drivers/char/cyclades.c

   1 #undef  BLOCKMOVE
   2 #define Z_WAKE
   3 #undef  Z_EXT_CHARS_IN_BUFFER
   4
   5 /*
   6  *  linux/drivers/char/cyclades.c
   7  *
   8  * This file contains the driver for the Cyclades async multiport
   9  * serial boards.
  10  *
  11  * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
  12  * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
  13  *
  14  * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
  15  *
  16  * Much of the design and some of the code came from serial.c
  17  * which was copyright (C) 1991, 1992  Linus Torvalds.  It was
  18  * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
  19  * and then fixed as suggested by Michael K. Johnson 12/12/92.
  20  * Converted to pci probing and cleaned up by Jiri Slaby.
  21  *
  22  * This version supports shared IRQ's (only for PCI boards).
  23  *
  24  * Prevent users from opening non-existing Z ports.
  25  *
  26  * Revision 2.3.2.8   2000/07/06 18:14:16 ivan
  27  * Fixed the PCI detection function to work properly on Alpha systems.
  28  * Implemented support for TIOCSERGETLSR ioctl.
  29  * Implemented full support for non-standard baud rates.
  30  *
  31  * Revision 2.3.2.7   2000/06/01 18:26:34 ivan
  32  * Request PLX I/O region, although driver doesn't use it, to avoid
  33  * problems with other drivers accessing it.
  34  * Removed count for on-board buffer characters in cy_chars_in_buffer
  35  * (Cyclades-Z only).
  36  *
  37  * Revision 2.3.2.6   2000/05/05 13:56:05 ivan
  38  * Driver now reports physical instead of virtual memory addresses.
  39  * Masks were added to some Cyclades-Z read accesses.
  40  * Implemented workaround for PLX9050 bug that would cause a system lockup
  41  * in certain systems, depending on the MMIO addresses allocated to the
  42  * board.
  43  * Changed the Tx interrupt programming in the CD1400 chips to boost up
  44  * performance (Cyclom-Y only).
  45  * Code is now compliant with the new module interface (module_[init|exit]).
  46  * Make use of the PCI helper functions to access PCI resources.
  47  * Did some code "housekeeping".
  48  *
  49  * Revision 2.3.2.5   2000/01/19 14:35:33 ivan
  50  * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
  51  *
  52  * Revision 2.3.2.4   2000/01/17 09:19:40 ivan
  53  * Fixed SMP locking in Cyclom-Y interrupt handler.
  54  *
  55  * Revision 2.3.2.3   1999/12/28 12:11:39 ivan
  56  * Added a new cyclades_card field called nports to allow the driver to
  57  * know the exact number of ports found by the Z firmware after its load;
  58  * RX buffer contention prevention logic on interrupt op mode revisited
  59  * (Cyclades-Z only);
  60  * Revisited printk's for Z debug;
  61  * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
  62  *
  63  * Revision 2.3.2.2   1999/10/01 11:27:43 ivan
  64  * Fixed bug in cyz_poll that would make all ports but port 0
  65  * unable to transmit/receive data (Cyclades-Z only);
  66  * Implemented logic to prevent the RX buffer from being stuck with data
  67  * due to a driver / firmware race condition in interrupt op mode
  68  * (Cyclades-Z only);
  69  * Fixed bug in block_til_ready logic that would lead to a system crash;
  70  * Revisited cy_close spinlock usage;
  71  *
  72  * Revision 2.3.2.1   1999/09/28 11:01:22 ivan
  73  * Revisited CONFIG_PCI conditional compilation for PCI board support;
  74  * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
  75  * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
  76  * Removed CTS handling from the driver -- this is now completely handled
  77  * by the firmware (Cyclades-Z only);
  78  * Flush RX on-board buffers on a port open (Cyclades-Z only);
  79  * Fixed handling of ASYNC_SPD_* TTY flags;
  80  * Module unload now unmaps all memory area allocated by ioremap;
  81  *
  82  * Revision 2.3.1.1   1999/07/15 16:45:53 ivan
  83  * Removed CY_PROC conditional compilation;
  84  * Implemented SMP-awareness for the driver;
  85  * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
  86  * functions;
  87  * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
  88  * (irq=NN) as parameters (only for ISA boards);
  89  * Fixed bug in set_line_char that would prevent the Cyclades-Z
  90  * ports from being configured at speeds above 115.2Kbps;
  91  * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
  92  * switching from working properly;
  93  * The driver now only prints IRQ info for the Cyclades-Z if it's
  94  * configured to work in interrupt mode;
  95  *
  96  * Revision 2.2.2.3   1999/06/28 11:13:29 ivan
  97  * Added support for interrupt mode operation for the Z cards;
  98  * Removed the driver inactivity control for the Z;
  99  * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
 100  * the Z firmware is not loaded yet;
 101  * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
 102  * same functionality;
 103  * Implemented workaround for IRQ setting loss on the PCI configuration
 104  * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
 105  *
 106  * Revision 2.2.2.2  1999/05/14 17:18:15 ivan
 107  * /proc entry location changed to /proc/tty/driver/cyclades;
 108  * Added support to shared IRQ's (only for PCI boards);
 109  * Added support for Cobalt Qube2 systems;
 110  * IRQ [de]allocation scheme revisited;
 111  * BREAK implementation changed in order to make use of the 'break_ctl'
 112  * TTY facility;
 113  * Fixed typo in TTY structure field 'driver_name';
 114  * Included a PCI bridge reset and EEPROM reload in the board
 115  * initialization code (for both Y and Z series).
 116  *
 117  * Revision 2.2.2.1  1999/04/08 16:17:43 ivan
 118  * Fixed a bug in cy_wait_until_sent that was preventing the port to be
 119  * closed properly after a SIGINT;
 120  * Module usage counter scheme revisited;
 121  * Added support to the upcoming Y PCI boards (i.e., support to additional
 122  * PCI Device ID's).
 123  *
 124  * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
 125  * Removed all unnecessary page-alignement operations in ioremap calls
 126  * (ioremap is currently safe for these operations).
 127  *
 128  * Revision 2.2.1.9  1998/12/30 18:18:30 ivan
 129  * Changed access to PLX PCI bridge registers from I/O to MMIO, in
 130  * order to make PLX9050-based boards work with certain motherboards.
 131  *
 132  * Revision 2.2.1.8  1998/11/13 12:46:20 ivan
 133  * cy_close function now resets (correctly) the tty->closing flag;
 134  * JIFFIES_DIFF macro fixed.
 135  *
 136  * Revision 2.2.1.7  1998/09/03 12:07:28 ivan
 137  * Fixed bug in cy_close function, which was not informing HW of
 138  * which port should have the reception disabled before doing so;
 139  * fixed Cyclom-8YoP hardware detection bug.
 140  *
 141  * Revision 2.2.1.6  1998/08/20 17:15:39 ivan
 142  * Fixed bug in cy_close function, which causes malfunction
 143  * of one of the first 4 ports when a higher port is closed
 144  * (Cyclom-Y only).
 145  *
 146  * Revision 2.2.1.5  1998/08/10 18:10:28 ivan
 147  * Fixed Cyclom-4Yo hardware detection bug.
 148  *
 149  * Revision 2.2.1.4  1998/08/04 11:02:50 ivan
 150  * /proc/cyclades implementation with great collaboration of
 151  * Marc Lewis <marc@blarg.net>;
 152  * cyy_interrupt was changed to avoid occurrence of kernel oopses
 153  * during PPP operation.
 154  *
 155  * Revision 2.2.1.3  1998/06/01 12:09:10 ivan
 156  * General code review in order to comply with 2.1 kernel standards;
 157  * data loss prevention for slow devices revisited (cy_wait_until_sent
 158  * was created);
 159  * removed conditional compilation for new/old PCI structure support
 160  * (now the driver only supports the new PCI structure).
 161  *
 162  * Revision 2.2.1.1  1998/03/19 16:43:12 ivan
 163  * added conditional compilation for new/old PCI structure support;
 164  * removed kernel series (2.0.x / 2.1.x) conditional compilation.
 165  *
 166  * Revision 2.1.1.3  1998/03/16 18:01:12 ivan
 167  * cleaned up the data loss fix;
 168  * fixed XON/XOFF handling once more (Cyclades-Z);
 169  * general review of the driver routines;
 170  * introduction of a mechanism to prevent data loss with slow
 171  * printers, by forcing a delay before closing the port.
 172  *
 173  * Revision 2.1.1.2  1998/02/17 16:50:00 ivan
 174  * fixed detection/handling of new CD1400 in Ye boards;
 175  * fixed XON/XOFF handling (Cyclades-Z);
 176  * fixed data loss caused by a premature port close;
 177  * introduction of a flag that holds the CD1400 version ID per port
 178  * (used by the CYGETCD1400VER new ioctl).
 179  *
 180  * Revision 2.1.1.1  1997/12/03 17:31:19 ivan
 181  * Code review for the module cleanup routine;
 182  * fixed RTS and DTR status report for new CD1400's in get_modem_info;
 183  * includes anonymous changes regarding signal_pending.
 184  *
 185  * Revision 2.1  1997/11/01 17:42:41 ivan
 186  * Changes in the driver to support Alpha systems (except 8Zo V_1);
 187  * BREAK fix for the Cyclades-Z boards;
 188  * driver inactivity control by FW implemented;
 189  * introduction of flag that allows driver to take advantage of
 190  * a special CD1400 feature related to HW flow control;
 191  * added support for the CD1400  rev. J (Cyclom-Y boards);
 192  * introduction of ioctls to:
 193  *  - control the rtsdtr_inv flag (Cyclom-Y);
 194  *  - control the rflow flag (Cyclom-Y);
 195  *  - adjust the polling interval (Cyclades-Z);
 196  *
 197  * Revision 1.36.4.33  1997/06/27 19:00:00  ivan
 198  * Fixes related to kernel version conditional
 199  * compilation.
 200  *
 201  * Revision 1.36.4.32  1997/06/14 19:30:00  ivan
 202  * Compatibility issues between kernels 2.0.x and
 203  * 2.1.x (mainly related to clear_bit function).
 204  *
 205  * Revision 1.36.4.31  1997/06/03 15:30:00  ivan
 206  * Changes to define the memory window according to the
 207  * board type.
 208  *
 209  * Revision 1.36.4.30  1997/05/16 15:30:00  daniel
 210  * Changes to support new cycladesZ boards.
 211  *
 212  * Revision 1.36.4.29  1997/05/12 11:30:00  daniel
 213  * Merge of Bentson's and Daniel's version 1.36.4.28.
 214  * Corrects bug in cy_detect_pci: check if there are more
 215  * ports than the number of static structs allocated.
 216  * Warning message during initialization if this driver is
 217  * used with the new generation of cycladesZ boards.  Those
 218  * will be supported only in next release of the driver.
 219  * Corrects bug in cy_detect_pci and cy_detect_isa that
 220  * returned wrong number of VALID boards, when a cyclomY
 221  * was found with no serial modules connected.
 222  * Changes to use current (2.1.x) kernel subroutine names
 223  * and created macros for compilation with 2.0.x kernel,
 224  * instead of the other way around.
 225  *
 226  * Revision 1.36.4.28  1997/05/?? ??:00:00  bentson
 227  * Change queue_task_irq_off to queue_task_irq.
 228  * The inline function queue_task_irq_off (tqueue.h)
 229  * was removed from latest releases of 2.1.x kernel.
 230  * Use of macro __init to mark the initialization
 231  * routines, so memory can be reused.
 232  * Also incorporate implementation of critical region
 233  * in function cleanup_module() created by anonymous
 234  * linuxer.
 235  *
 236  * Revision 1.36.4.28  1997/04/25 16:00:00  daniel
 237  * Change to support new firmware that solves DCD problem:
 238  * application could fail to receive SIGHUP signal when DCD
 239  * varying too fast.
 240  *
 241  * Revision 1.36.4.27  1997/03/26 10:30:00  daniel
 242  * Changed for support linux versions 2.1.X.
 243  * Backward compatible with linux versions 2.0.X.
 244  * Corrected illegal use of filler field in
 245  * CH_CTRL struct.
 246  * Deleted some debug messages.
 247  *
 248  * Revision 1.36.4.26  1997/02/27 12:00:00  daniel
 249  * Included check for NULL tty pointer in cyz_poll.
 250  *
 251  * Revision 1.36.4.25  1997/02/26 16:28:30  bentson
 252  * Bill Foster at Blarg! Online services noticed that
 253  * some of the switch elements of -Z modem control
 254  * lacked a closing "break;"
 255  *
 256  * Revision 1.36.4.24  1997/02/24 11:00:00  daniel
 257  * Changed low water threshold for buffer xmit_buf
 258  *
 259  * Revision 1.36.4.23  1996/12/02 21:50:16  bentson
 260  * Marcio provided fix to modem status fetch for -Z
 261  *
 262  * Revision 1.36.4.22  1996/10/28 22:41:17  bentson
 263  * improve mapping of -Z control page (thanks to Steve
 264  * Price <stevep@fa.tdktca.com> for help on this)
 265  *
 266  * Revision 1.36.4.21  1996/09/10 17:00:10  bentson
 267  * shift from CPU-bound to memcopy in cyz_polling operation
 268  *
 269  * Revision 1.36.4.20  1996/09/09 18:30:32  Bentson
 270  * Added support to set and report higher speeds.
 271  *
 272  * Revision 1.36.4.19c  1996/08/09 10:00:00  Marcio Saito
 273  * Some fixes in the HW flow control for the BETA release.
 274  * Don't try to register the IRQ.
 275  *
 276  * Revision 1.36.4.19  1996/08/08 16:23:18  Bentson
 277  * make sure "cyc" appears in all kernel messages; all soft interrupts
 278  * handled by same routine; recognize out-of-band reception; comment
 279  * out some diagnostic messages; leave RTS/CTS flow control to hardware;
 280  * fix race condition in -Z buffer management; only -Y needs to explicitly
 281  * flush chars; tidy up some startup messages;
 282  *
 283  * Revision 1.36.4.18  1996/07/25 18:57:31  bentson
 284  * shift MOD_INC_USE_COUNT location to match
 285  * serial.c; purge some diagnostic messages;
 286  *
 287  * Revision 1.36.4.17  1996/07/25 18:01:08  bentson
 288  * enable modem status messages and fetch & process them; note
 289  * time of last activity type for each port; set_line_char now
 290  * supports more than line 0 and treats 0 baud correctly;
 291  * get_modem_info senses rs_status;
 292  *
 293  * Revision 1.36.4.16  1996/07/20 08:43:15  bentson
 294  * barely works--now's time to turn on
 295  * more features 'til it breaks
 296  *
 297  * Revision 1.36.4.15  1996/07/19 22:30:06  bentson
 298  * check more -Z board status; shorten boot message
 299  *
 300  * Revision 1.36.4.14  1996/07/19 22:20:37  bentson
 301  * fix reference to ch_ctrl in startup; verify return
 302  * values from cyz_issue_cmd and cyz_update_channel;
 303  * more stuff to get modem control correct;
 304  *
 305  * Revision 1.36.4.13  1996/07/11 19:53:33  bentson
 306  * more -Z stuff folded in; re-order changes to put -Z stuff
 307  * after -Y stuff (to make changes clearer)
 308  *
 309  * Revision 1.36.4.12  1996/07/11 15:40:55  bentson
 310  * Add code to poll Cyclades-Z.  Add code to get & set RS-232 control.
 311  * Add code to send break.  Clear firmware ID word at startup (so
 312  * that other code won't talk to inactive board).
 313  *
 314  * Revision 1.36.4.11  1996/07/09 05:28:29  bentson
 315  * add code for -Z in set_line_char
 316  *
 317  * Revision 1.36.4.10  1996/07/08 19:28:37  bentson
 318  * fold more -Z stuff (or in some cases, error messages)
 319  * into driver; add text to "don't know what to do" messages.
 320  *
 321  * Revision 1.36.4.9  1996/07/08 18:38:38  bentson
 322  * moved compile-time flags near top of file; cosmetic changes
 323  * to narrow text (to allow 2-up printing); changed many declarations
 324  * to "static" to limit external symbols; shuffled code order to
 325  * coalesce -Y and -Z specific code, also to put internal functions
 326  * in order of tty_driver structure; added code to recognize -Z
 327  * ports (and for moment, do nothing or report error); add cy_startup
 328  * to parse boot command line for extra base addresses for ISA probes;
 329  *
 330  * Revision 1.36.4.8  1996/06/25 17:40:19  bentson
 331  * reorder some code, fix types of some vars (int vs. long),
 332  * add cy_setup to support user declared ISA addresses
 333  *
 334  * Revision 1.36.4.7  1996/06/21 23:06:18  bentson
 335  * dump ioctl based firmware load (it's now a user level
 336  * program); ensure uninitialzed ports cannot be used
 337  *
 338  * Revision 1.36.4.6  1996/06/20 23:17:19  bentson
 339  * rename vars and restructure some code
 340  *
 341  * Revision 1.36.4.5  1996/06/14 15:09:44  bentson
 342  * get right status back after boot load
 343  *
 344  * Revision 1.36.4.4  1996/06/13 19:51:44  bentson
 345  * successfully loads firmware
 346  *
 347  * Revision 1.36.4.3  1996/06/13 06:08:33  bentson
 348  * add more of the code for the boot/load ioctls
 349  *
 350  * Revision 1.36.4.2  1996/06/11 21:00:51  bentson
 351  * start to add Z functionality--starting with ioctl
 352  * for loading firmware
 353  *
 354  * Revision 1.36.4.1  1996/06/10 18:03:02  bentson
 355  * added code to recognize Z/PCI card at initialization; report
 356  * presence, but card is not initialized (because firmware needs
 357  * to be loaded)
 358  *
 359  * Revision 1.36.3.8  1996/06/07 16:29:00  bentson
 360  * starting minor number at zero; added missing verify_area
 361  * as noted by Heiko Eißfeldt <heiko@colossus.escape.de>
 362  *
 363  * Revision 1.36.3.7  1996/04/19 21:06:18  bentson
 364  * remove unneeded boot message & fix CLOCAL hardware flow
 365  * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
 366  * remove unused diagnostic statements; minor 0 is first;
 367  *
 368  * Revision 1.36.3.6  1996/03/13 13:21:17  marcio
 369  * The kernel function vremap (available only in later 1.3.xx kernels)
 370  * allows the access to memory addresses above the RAM. This revision
 371  * of the driver supports PCI boards below 1Mb (device id 0x100) and
 372  * above 1Mb (device id 0x101).
 373  *
 374  * Revision 1.36.3.5  1996/03/07 15:20:17  bentson
 375  * Some global changes to interrupt handling spilled into
 376  * this driver--mostly unused arguments in system function
 377  * calls.  Also added change by Marcio Saito which should
 378  * reduce lost interrupts at startup by fast processors.
 379  *
 380  * Revision 1.36.3.4  1995/11/13  20:45:10  bentson
 381  * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
 382  * in 1.3.41 kernel to remove a possible race condition, extend
 383  * some error messages, and let the driver run as a loadable module
 384  * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
 385  * possible race condition.
 386  * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
 387  *
 388  * Revision 1.36.3.3  1995/11/13  19:44:48  bentson
 389  * Changes by Linus Torvalds in 1.3.33 kernel distribution
 390  * required due to reordering of driver initialization.
 391  * Drivers are now initialized *after* memory management.
 392  *
 393  * Revision 1.36.3.2  1995/09/08  22:07:14  bentson
 394  * remove printk from ISR; fix typo
 395  *
 396  * Revision 1.36.3.1  1995/09/01  12:00:42  marcio
 397  * Minor fixes in the PCI board support. PCI function calls in
 398  * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
 399  * <duncan@okay.com>. "bad serial count" message removed.
 400  *
 401  * Revision 1.36.3  1995/08/22  09:19:42  marcio
 402  * Cyclom-Y/PCI support added. Changes in the cy_init routine and
 403  * board initialization. Changes in the boot messages. The driver
 404  * supports up to 4 boards and 64 ports by default.
 405  *
 406  * Revision 1.36.1.4  1995/03/29  06:14:14  bentson
 407  * disambiguate between Cyclom-16Y and Cyclom-32Ye;
 408  *
 409  * Revision 1.36.1.3  1995/03/23  22:15:35  bentson
 410  * add missing break in modem control block in ioctl switch statement
 411  * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
 412  *
 413  * Revision 1.36.1.2  1995/03/22  19:16:22  bentson
 414  * make sure CTS flow control is set as soon as possible (thanks
 415  * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
 416  *
 417  * Revision 1.36.1.1  1995/03/13  15:44:43  bentson
 418  * initialize defaults for receive threshold and stale data timeout;
 419  * cosmetic changes;
 420  *
 421  * Revision 1.36  1995/03/10  23:33:53  bentson
 422  * added support of chips 4-7 in 32 port Cyclom-Ye;
 423  * fix cy_interrupt pointer dereference problem
 424  * (Joe Portman <baron@aa.net>);
 425  * give better error response if open is attempted on non-existent port
 426  * (Zachariah Vaum <jchryslr@netcom.com>);
 427  * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
 428  * conditional compilation for -16Y on systems with fast, noisy bus;
 429  * comment out diagnostic print function;
 430  * cleaned up table of base addresses;
 431  * set receiver time-out period register to correct value,
 432  * set receive threshold to better default values,
 433  * set chip timer to more accurate 200 Hz ticking,
 434  * add code to monitor and modify receive parameters
 435  * (Rik Faith <faith@cs.unc.edu> Nick Simicich
 436  * <njs@scifi.emi.net>);
 437  *
 438  * Revision 1.35  1994/12/16  13:54:18  steffen
 439  * additional patch by Marcio Saito for board detection
 440  * Accidently left out in 1.34
 441  *
 442  * Revision 1.34  1994/12/10  12:37:12  steffen
 443  * This is the corrected version as suggested by Marcio Saito
 444  *
 445  * Revision 1.33  1994/12/01  22:41:18  bentson
 446  * add hooks to support more high speeds directly; add tytso
 447  * patch regarding CLOCAL wakeups
 448  *
 449  * Revision 1.32  1994/11/23  19:50:04  bentson
 450  * allow direct kernel control of higher signalling rates;
 451  * look for cards at additional locations
 452  *
 453  * Revision 1.31  1994/11/16  04:33:28  bentson
 454  * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
 455  * a problem in chars_in_buffer has been resolved by some
 456  * small changes;  this should yield smoother output
 457  *
 458  * Revision 1.30  1994/11/16  04:28:05  bentson
 459  * Fix from Corey Minyard, Internet: minyard@metronet.com,
 460  * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
 461  * cy_hangup that appears to clear up much (all?) of the
 462  * DTR glitches; also he's added/cleaned-up diagnostic messages
 463  *
 464  * Revision 1.29  1994/11/16  04:16:07  bentson
 465  * add change proposed by Ralph Sims, ralphs@halcyon.com, to
 466  * operate higher speeds in same way as other serial ports;
 467  * add more serial ports (for up to two 16-port muxes).
 468  *
 469  * Revision 1.28  1994/11/04  00:13:16  root
 470  * turn off diagnostic messages
 471  *
 472  * Revision 1.27  1994/11/03  23:46:37  root
 473  * bunch of changes to bring driver into greater conformance
 474  * with the serial.c driver (looking for missed fixes)
 475  *
 476  * Revision 1.26  1994/11/03  22:40:36  root
 477  * automatic interrupt probing fixed.
 478  *
 479  * Revision 1.25  1994/11/03  20:17:02  root
 480  * start to implement auto-irq
 481  *
 482  * Revision 1.24  1994/11/03  18:01:55  root
 483  * still working on modem signals--trying not to drop DTR
 484  * during the getty/login processes
 485  *
 486  * Revision 1.23  1994/11/03  17:51:36  root
 487  * extend baud rate support; set receive threshold as function
 488  * of baud rate; fix some problems with RTS/CTS;
 489  *
 490  * Revision 1.22  1994/11/02  18:05:35  root
 491  * changed arguments to udelay to type long to get
 492  * delays to be of correct duration
 493  *
 494  * Revision 1.21  1994/11/02  17:37:30  root
 495  * employ udelay (after calibrating loops_per_second earlier
 496  * in init/main.c) instead of using home-grown delay routines
 497  *
 498  * Revision 1.20  1994/11/02  03:11:38  root
 499  * cy_chars_in_buffer forces a return value of 0 to let
 500  * login work (don't know why it does); some functions
 501  * that were returning EFAULT, now executes the code;
 502  * more work on deciding when to disable xmit interrupts;
 503  *
 504  * Revision 1.19  1994/11/01  20:10:14  root
 505  * define routine to start transmission interrupts (by enabling
 506  * transmit interrupts); directly enable/disable modem interrupts;
 507  *
 508  * Revision 1.18  1994/11/01  18:40:45  bentson
 509  * Don't always enable transmit interrupts in startup; interrupt on
 510  * TxMpty instead of TxRdy to help characters get out before shutdown;
 511  * restructure xmit interrupt to check for chars first and quit if
 512  * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
 513  * (to my view);
 514  *
 515  * Revision 1.17  1994/10/30  04:39:45  bentson
 516  * rename serial_driver and callout_driver to cy_serial_driver and
 517  * cy_callout_driver to avoid linkage interference; initialize
 518  * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
 519  * from cyclades_port structure; add paranoia check to cy_close;
 520  *
 521  * Revision 1.16  1994/10/30  01:14:33  bentson
 522  * change major numbers; add some _early_ return statements;
 523  *
 524  * Revision 1.15  1994/10/29  06:43:15  bentson
 525  * final tidying up for clean compile;  enable some error reporting
 526  *
 527  * Revision 1.14  1994/10/28  20:30:22  Bentson
 528  * lots of changes to drag the driver towards the new tty_io
 529  * structures and operation.  not expected to work, but may
 530  * compile cleanly.
 531  *
 532  * Revision 1.13  1994/07/21  23:08:57  Bentson
 533  * add some diagnostic cruft; support 24 lines (for testing
 534  * both -8Y and -16Y cards; be more thorough in servicing all
 535  * chips during interrupt; add "volatile" a few places to
 536  * circumvent compiler optimizations; fix base & offset
 537  * computations in block_til_ready (was causing chip 0 to
 538  * stop operation)
 539  *
 540  * Revision 1.12  1994/07/19  16:42:11  Bentson
 541  * add some hackery for kernel version 1.1.8; expand
 542  * error messages; refine timing for delay loops and
 543  * declare loop params volatile
 544  *
 545  * Revision 1.11  1994/06/11  21:53:10  bentson
 546  * get use of save_car right in transmit interrupt service
 547  *
 548  * Revision 1.10.1.1  1994/06/11  21:31:18  bentson
 549  * add some diagnostic printing; try to fix save_car stuff
 550  *
 551  * Revision 1.10  1994/06/11  20:36:08  bentson
 552  * clean up compiler warnings
 553  *
 554  * Revision 1.9  1994/06/11  19:42:46  bentson
 555  * added a bunch of code to support modem signalling
 556  *
 557  * Revision 1.8  1994/06/11  17:57:07  bentson
 558  * recognize break & parity error
 559  *
 560  * Revision 1.7  1994/06/05  05:51:34  bentson
 561  * Reorder baud table to be monotonic; add cli to CP; discard
 562  * incoming characters and status if the line isn't open; start to
 563  * fold code into cy_throttle; start to port get_serial_info,
 564  * set_serial_info, get_modem_info, set_modem_info, and send_break
 565  * from serial.c; expand cy_ioctl; relocate and expand config_setup;
 566  * get flow control characters from tty struct; invalidate ports w/o
 567  * hardware;
 568  *
 569  * Revision 1.6  1994/05/31  18:42:21  bentson
 570  * add a loop-breaker in the interrupt service routine;
 571  * note when port is initialized so that it can be shut
 572  * down under the right conditions; receive works without
 573  * any obvious errors
 574  *
 575  * Revision 1.5  1994/05/30  00:55:02  bentson
 576  * transmit works without obvious errors
 577  *
 578  * Revision 1.4  1994/05/27  18:46:27  bentson
 579  * incorporated more code from lib_y.c; can now print short
 580  * strings under interrupt control to port zero; seems to
 581  * select ports/channels/lines correctly
 582  *
 583  * Revision 1.3  1994/05/25  22:12:44  bentson
 584  * shifting from multi-port on a card to proper multiplexor
 585  * data structures;  added skeletons of most routines
 586  *
 587  * Revision 1.2  1994/05/19  13:21:43  bentson
 588  * start to crib from other sources
 589  *
 590  */
 591
 592 #define CY_VERSION      "2.5"
 593
 594 /* If you need to install more boards than NR_CARDS, change the constant
 595    in the definition below. No other change is necessary to support up to
 596    eight boards. Beyond that you'll have to extend cy_isa_addresses. */
 597
 598 #define NR_CARDS        4
 599
 600 /*
 601    If the total number of ports is larger than NR_PORTS, change this
 602    constant in the definition below. No other change is necessary to
 603    support more boards/ports. */
 604
 605 #define NR_PORTS        256
 606
 607 #define ZO_V1   0
 608 #define ZO_V2   1
 609 #define ZE_V1   2
 610
 611 #define SERIAL_PARANOIA_CHECK
 612 #undef  CY_DEBUG_OPEN
 613 #undef  CY_DEBUG_THROTTLE
 614 #undef  CY_DEBUG_OTHER
 615 #undef  CY_DEBUG_IO
 616 #undef  CY_DEBUG_COUNT
 617 #undef  CY_DEBUG_DTR
 618 #undef  CY_DEBUG_WAIT_UNTIL_SENT
 619 #undef  CY_DEBUG_INTERRUPTS
 620 #undef  CY_16Y_HACK
 621 #undef  CY_ENABLE_MONITORING
 622 #undef  CY_PCI_DEBUG
 623
 624 /*
 625  * Include section
 626  */
 627 #include <linux/module.h>
 628 #include <linux/errno.h>
 629 #include <linux/signal.h>
 630 #include <linux/sched.h>
 631 #include <linux/timer.h>
 632 #include <linux/interrupt.h>
 633 #include <linux/tty.h>
 634 #include <linux/tty_flip.h>
 635 #include <linux/serial.h>
 636 #include <linux/smp_lock.h>
 637 #include <linux/major.h>
 638 #include <linux/string.h>
 639 #include <linux/fcntl.h>
 640 #include <linux/ptrace.h>
 641 #include <linux/cyclades.h>
 642 #include <linux/mm.h>
 643 #include <linux/ioport.h>
 644 #include <linux/init.h>
 645 #include <linux/delay.h>
 646 #include <linux/spinlock.h>
 647 #include <linux/bitops.h>
 648 #include <linux/firmware.h>
 649 #include <linux/device.h>
 650
 651 #include <asm/system.h>
 652 #include <linux/io.h>
 653 #include <asm/irq.h>
 654 #include <linux/uaccess.h>
 655
 656 #include <linux/kernel.h>
 657 #include <linux/pci.h>
 658
 659 #include <linux/stat.h>
 660 #include <linux/proc_fs.h>
 661 #include <linux/seq_file.h>
 662
 663 static void cy_throttle(struct tty_struct *tty);
 664 static void cy_send_xchar(struct tty_struct *tty, char ch);
 665
 666 #ifndef SERIAL_XMIT_SIZE
 667 #define SERIAL_XMIT_SIZE        (min(PAGE_SIZE, 4096))
 668 #endif
 669 #define WAKEUP_CHARS            256
 670
 671 #define STD_COM_FLAGS (0)
 672
 673 /* firmware stuff */
 674 #define ZL_MAX_BLOCKS   16
 675 #define DRIVER_VERSION  0x02010203
 676 #define RAM_SIZE 0x80000
 677
 678 enum zblock_type {
 679         ZBLOCK_PRG = 0,
 680         ZBLOCK_FPGA = 1
 681 };
 682
 683 struct zfile_header {
 684         char name[64];
 685         char date[32];
 686         char aux[32];
 687         u32 n_config;
 688         u32 config_offset;
 689         u32 n_blocks;
 690         u32 block_offset;
 691         u32 reserved[9];
 692 } __attribute__ ((packed));
 693
 694 struct zfile_config {
 695         char name[64];
 696         u32 mailbox;
 697         u32 function;
 698         u32 n_blocks;
 699         u32 block_list[ZL_MAX_BLOCKS];
 700 } __attribute__ ((packed));
 701
 702 struct zfile_block {
 703         u32 type;
 704         u32 file_offset;
 705         u32 ram_offset;
 706         u32 size;
 707 } __attribute__ ((packed));
 708
 709 static struct tty_driver *cy_serial_driver;
 710
 711 #ifdef CONFIG_ISA
 712 /* This is the address lookup table. The driver will probe for
 713    Cyclom-Y/ISA boards at all addresses in here. If you want the
 714    driver to probe addresses at a different address, add it to
 715    this table.  If the driver is probing some other board and
 716    causing problems, remove the offending address from this table.
 717 */
 718
 719 static unsigned int cy_isa_addresses[] = {
 720         0xD0000,
 721         0xD2000,
 722         0xD4000,
 723         0xD6000,
 724         0xD8000,
 725         0xDA000,
 726         0xDC000,
 727         0xDE000,
 728         0, 0, 0, 0, 0, 0, 0, 0
 729 };
 730
 731 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
 732
 733 #ifdef MODULE
 734 static long maddr[NR_CARDS];
 735 static int irq[NR_CARDS];
 736
 737 module_param_array(maddr, long, NULL, 0);
 738 module_param_array(irq, int, NULL, 0);
 739 #endif
 740
 741 #endif                          /* CONFIG_ISA */
 742
 743 /* This is the per-card data structure containing address, irq, number of
 744    channels, etc. This driver supports a maximum of NR_CARDS cards.
 745 */
 746 static struct cyclades_card cy_card[NR_CARDS];
 747
 748 static int cy_next_channel;     /* next minor available */
 749
 750 /*
 751  * This is used to look up the divisor speeds and the timeouts
 752  * We're normally limited to 15 distinct baud rates.  The extra
 753  * are accessed via settings in info->port.flags.
 754  *      0,     1,     2,     3,     4,     5,     6,     7,     8,     9,
 755  *     10,    11,    12,    13,    14,    15,    16,    17,    18,    19,
 756  *                                               HI            VHI
 757  *     20
 758  */
 759 static int baud_table[] = {
 760         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
 761         1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
 762         230400, 0
 763 };
 764
 765 static char baud_co_25[] = {    /* 25 MHz clock option table */
 766         /* value =>    00    01   02    03    04 */
 767         /* divide by    8    32   128   512  2048 */
 768         0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
 769         0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 770 };
 771
 772 static char baud_bpr_25[] = {   /* 25 MHz baud rate period table */
 773         0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
 774         0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
 775 };
 776
 777 static char baud_co_60[] = {    /* 60 MHz clock option table (CD1400 J) */
 778         /* value =>    00    01   02    03    04 */
 779         /* divide by    8    32   128   512  2048 */
 780         0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
 781         0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
 782         0x00
 783 };
 784
 785 static char baud_bpr_60[] = {   /* 60 MHz baud rate period table (CD1400 J) */
 786         0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
 787         0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
 788         0x21
 789 };
 790
 791 static char baud_cor3[] = {     /* receive threshold */
 792         0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
 793         0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
 794         0x07
 795 };
 796
 797 /*
 798  * The Cyclades driver implements HW flow control as any serial driver.
 799  * The cyclades_port structure member rflow and the vector rflow_thr
 800  * allows us to take advantage of a special feature in the CD1400 to avoid
 801  * data loss even when the system interrupt latency is too high. These flags
 802  * are to be used only with very special applications. Setting these flags
 803  * requires the use of a special cable (DTR and RTS reversed). In the new
 804  * CD1400-based boards (rev. 6.00 or later), there is no need for special
 805  * cables.
 806  */
 807
 808 static char rflow_thr[] = {     /* rflow threshold */
 809         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 810         0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
 811         0x0a
 812 };
 813
 814 /*  The Cyclom-Ye has placed the sequential chips in non-sequential
 815  *  address order.  This look-up table overcomes that problem.
 816  */
 817 static int cy_chip_offset[] = { 0x0000,
 818         0x0400,
 819         0x0800,
 820         0x0C00,
 821         0x0200,
 822         0x0600,
 823         0x0A00,
 824         0x0E00
 825 };
 826
 827 /* PCI related definitions */
 828
 829 #ifdef CONFIG_PCI
 830 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
 831         /* PCI < 1Mb */
 832         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
 833         /* PCI > 1Mb */
 834         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
 835         /* 4Y PCI < 1Mb */
 836         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
 837         /* 4Y PCI > 1Mb */
 838         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
 839         /* 8Y PCI < 1Mb */
 840         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
 841         /* 8Y PCI > 1Mb */
 842         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
 843         /* Z PCI < 1Mb */
 844         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
 845         /* Z PCI > 1Mb */
 846         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
 847         { }                     /* end of table */
 848 };
 849 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
 850 #endif
 851
 852 static void cy_start(struct tty_struct *);
 853 static void cy_set_line_char(struct cyclades_port *, struct tty_struct *);
 854 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
 855 #ifdef CONFIG_ISA
 856 static unsigned detect_isa_irq(void __iomem *);
 857 #endif                          /* CONFIG_ISA */
 858
 859 #ifndef CONFIG_CYZ_INTR
 860 static void cyz_poll(unsigned long);
 861
 862 /* The Cyclades-Z polling cycle is defined by this variable */
 863 static long cyz_polling_cycle = CZ_DEF_POLL;
 864
 865 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
 866
 867 #else                           /* CONFIG_CYZ_INTR */
 868 static void cyz_rx_restart(unsigned long);
 869 static struct timer_list cyz_rx_full_timer[NR_PORTS];
 870 #endif                          /* CONFIG_CYZ_INTR */
 871
 872 static inline bool cy_is_Z(struct cyclades_card *card)
 873 {
 874         return card->num_chips == (unsigned int)-1;
 875 }
 876
 877 static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr)
 878 {
 879         return readl(&ctl_addr->init_ctrl) & (1 << 17);
 880 }
 881
 882 static inline bool cyz_fpga_loaded(struct cyclades_card *card)
 883 {
 884         return __cyz_fpga_loaded(card->ctl_addr.p9060);
 885 }
 886
 887 static inline bool cyz_is_loaded(struct cyclades_card *card)
 888 {
 889         struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS;
 890
 891         return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) &&
 892                         readl(&fw_id->signature) == ZFIRM_ID;
 893 }
 894
 895 static inline int serial_paranoia_check(struct cyclades_port *info,
 896                 char *name, const char *routine)
 897 {
 898 #ifdef SERIAL_PARANOIA_CHECK
 899         if (!info) {
 900                 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
 901                                 "in %s\n", name, routine);
 902                 return 1;
 903         }
 904
 905         if (info->magic != CYCLADES_MAGIC) {
 906                 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
 907                                 "struct (%s) in %s\n", name, routine);
 908                 return 1;
 909         }
 910 #endif
 911         return 0;
 912 }                               /* serial_paranoia_check */
 913
 914 /***********************************************************/
 915 /********* Start of block of Cyclom-Y specific code ********/
 916
 917 /* This routine waits up to 1000 micro-seconds for the previous
 918    command to the Cirrus chip to complete and then issues the
 919    new command.  An error is returned if the previous command
 920    didn't finish within the time limit.
 921
 922    This function is only called from inside spinlock-protected code.
 923  */
 924 static int cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index)
 925 {
 926         unsigned int i;
 927
 928         /* Check to see that the previous command has completed */
 929         for (i = 0; i < 100; i++) {
 930                 if (readb(base_addr + (CyCCR << index)) == 0)
 931                         break;
 932                 udelay(10L);
 933         }
 934         /* if the CCR never cleared, the previous command
 935            didn't finish within the "reasonable time" */
 936         if (i == 100)
 937                 return -1;
 938
 939         /* Issue the new command */
 940         cy_writeb(base_addr + (CyCCR << index), cmd);
 941
 942         return 0;
 943 }                               /* cyy_issue_cmd */
 944
 945 #ifdef CONFIG_ISA
 946 /* ISA interrupt detection code */
 947 static unsigned detect_isa_irq(void __iomem *address)
 948 {
 949         int irq;
 950         unsigned long irqs, flags;
 951         int save_xir, save_car;
 952         int index = 0;          /* IRQ probing is only for ISA */
 953
 954         /* forget possible initially masked and pending IRQ */
 955         irq = probe_irq_off(probe_irq_on());
 956
 957         /* Clear interrupts on the board first */
 958         cy_writeb(address + (Cy_ClrIntr << index), 0);
 959         /* Cy_ClrIntr is 0x1800 */
 960
 961         irqs = probe_irq_on();
 962         /* Wait ... */
 963         udelay(5000L);
 964
 965         /* Enable the Tx interrupts on the CD1400 */
 966         local_irq_save(flags);
 967         cy_writeb(address + (CyCAR << index), 0);
 968         cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
 969
 970         cy_writeb(address + (CyCAR << index), 0);
 971         cy_writeb(address + (CySRER << index),
 972                   readb(address + (CySRER << index)) | CyTxRdy);
 973         local_irq_restore(flags);
 974
 975         /* Wait ... */
 976         udelay(5000L);
 977
 978         /* Check which interrupt is in use */
 979         irq = probe_irq_off(irqs);
 980
 981         /* Clean up */
 982         save_xir = (u_char) readb(address + (CyTIR << index));
 983         save_car = readb(address + (CyCAR << index));
 984         cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
 985         cy_writeb(address + (CySRER << index),
 986                   readb(address + (CySRER << index)) & ~CyTxRdy);
 987         cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
 988         cy_writeb(address + (CyCAR << index), (save_car));
 989         cy_writeb(address + (Cy_ClrIntr << index), 0);
 990         /* Cy_ClrIntr is 0x1800 */
 991
 992         return (irq > 0) ? irq : 0;
 993 }
 994 #endif                          /* CONFIG_ISA */
 995
 996 static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
 997                 void __iomem *base_addr)
 998 {
 999         struct cyclades_port *info;
1000         struct tty_struct *tty;
1001         int len, index = cinfo->bus_index;
1002         u8 save_xir, channel, save_car, data, char_count;
1003
1004 #ifdef CY_DEBUG_INTERRUPTS
1005         printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
1006 #endif
1007         /* determine the channel & change to that context */
1008         save_xir = readb(base_addr + (CyRIR << index));
1009         channel = save_xir & CyIRChannel;
1010         info = &cinfo->ports[channel + chip * 4];
1011         save_car = readb(base_addr + (CyCAR << index));
1012         cy_writeb(base_addr + (CyCAR << index), save_xir);
1013
1014         tty = tty_port_tty_get(&info->port);
1015         /* if there is nowhere to put the data, discard it */
1016         if (tty == NULL) {
1017                 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1018                                 CyIVRRxEx) {    /* exception */
1019                         data = readb(base_addr + (CyRDSR << index));
1020                 } else {        /* normal character reception */
1021                         char_count = readb(base_addr + (CyRDCR << index));
1022                         while (char_count--)
1023                                 data = readb(base_addr + (CyRDSR << index));
1024                 }
1025                 goto end;
1026         }
1027         /* there is an open port for this data */
1028         if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1029                         CyIVRRxEx) {    /* exception */
1030                 data = readb(base_addr + (CyRDSR << index));
1031
1032                 /* For statistics only */
1033                 if (data & CyBREAK)
1034                         info->icount.brk++;
1035                 else if (data & CyFRAME)
1036                         info->icount.frame++;
1037                 else if (data & CyPARITY)
1038                         info->icount.parity++;
1039                 else if (data & CyOVERRUN)
1040                         info->icount.overrun++;
1041
1042                 if (data & info->ignore_status_mask) {
1043                         info->icount.rx++;
1044                         tty_kref_put(tty);
1045                         return;
1046                 }
1047                 if (tty_buffer_request_room(tty, 1)) {
1048                         if (data & info->read_status_mask) {
1049                                 if (data & CyBREAK) {
1050                                         tty_insert_flip_char(tty,
1051                                                 readb(base_addr + (CyRDSR <<
1052                                                         index)), TTY_BREAK);
1053                                         info->icount.rx++;
1054                                         if (info->port.flags & ASYNC_SAK)
1055                                                 do_SAK(tty);
1056                                 } else if (data & CyFRAME) {
1057                                         tty_insert_flip_char(tty,
1058                                                 readb(base_addr + (CyRDSR <<
1059                                                         index)), TTY_FRAME);
1060                                         info->icount.rx++;
1061                                         info->idle_stats.frame_errs++;
1062                                 } else if (data & CyPARITY) {
1063                                         /* Pieces of seven... */
1064                                         tty_insert_flip_char(tty,
1065                                                 readb(base_addr + (CyRDSR <<
1066                                                         index)), TTY_PARITY);
1067                                         info->icount.rx++;
1068                                         info->idle_stats.parity_errs++;
1069                                 } else if (data & CyOVERRUN) {
1070                                         tty_insert_flip_char(tty, 0,
1071                                                         TTY_OVERRUN);
1072                                         info->icount.rx++;
1073                                         /* If the flip buffer itself is
1074                                            overflowing, we still lose
1075                                            the next incoming character.
1076                                          */
1077                                         tty_insert_flip_char(tty,
1078                                                 readb(base_addr + (CyRDSR <<
1079                                                         index)), TTY_FRAME);
1080                                         info->icount.rx++;
1081                                         info->idle_stats.overruns++;
1082                                 /* These two conditions may imply */
1083                                 /* a normal read should be done. */
1084                                 /* } else if(data & CyTIMEOUT) { */
1085                                 /* } else if(data & CySPECHAR) { */
1086                                 } else {
1087                                         tty_insert_flip_char(tty, 0,
1088                                                         TTY_NORMAL);
1089                                         info->icount.rx++;
1090                                 }
1091                         } else {
1092                                 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1093                                 info->icount.rx++;
1094                         }
1095                 } else {
1096                         /* there was a software buffer overrun and nothing
1097                          * could be done about it!!! */
1098                         info->icount.buf_overrun++;
1099                         info->idle_stats.overruns++;
1100                 }
1101         } else {        /* normal character reception */
1102                 /* load # chars available from the chip */
1103                 char_count = readb(base_addr + (CyRDCR << index));
1104
1105 #ifdef CY_ENABLE_MONITORING
1106                 ++info->mon.int_count;
1107                 info->mon.char_count += char_count;
1108                 if (char_count > info->mon.char_max)
1109                         info->mon.char_max = char_count;
1110                 info->mon.char_last = char_count;
1111 #endif
1112                 len = tty_buffer_request_room(tty, char_count);
1113                 while (len--) {
1114                         data = readb(base_addr + (CyRDSR << index));
1115                         tty_insert_flip_char(tty, data, TTY_NORMAL);
1116                         info->idle_stats.recv_bytes++;
1117                         info->icount.rx++;
1118 #ifdef CY_16Y_HACK
1119                         udelay(10L);
1120 #endif
1121                 }
1122                 info->idle_stats.recv_idle = jiffies;
1123         }
1124         tty_schedule_flip(tty);
1125         tty_kref_put(tty);
1126 end:
1127         /* end of service */
1128         cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f);
1129         cy_writeb(base_addr + (CyCAR << index), save_car);
1130 }
1131
1132 static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
1133                 void __iomem *base_addr)
1134 {
1135         struct cyclades_port *info;
1136         struct tty_struct *tty;
1137         int char_count, index = cinfo->bus_index;
1138         u8 save_xir, channel, save_car, outch;
1139
1140         /* Since we only get here when the transmit buffer
1141            is empty, we know we can always stuff a dozen
1142            characters. */
1143 #ifdef CY_DEBUG_INTERRUPTS
1144         printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1145 #endif
1146
1147         /* determine the channel & change to that context */
1148         save_xir = readb(base_addr + (CyTIR << index));
1149         channel = save_xir & CyIRChannel;
1150         save_car = readb(base_addr + (CyCAR << index));
1151         cy_writeb(base_addr + (CyCAR << index), save_xir);
1152
1153         /* validate the port# (as configured and open) */
1154         if (channel + chip * 4 >= cinfo->nports) {
1155                 cy_writeb(base_addr + (CySRER << index),
1156                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1157                 goto end;
1158         }
1159         info = &cinfo->ports[channel + chip * 4];
1160         tty = tty_port_tty_get(&info->port);
1161         if (tty == NULL) {
1162                 cy_writeb(base_addr + (CySRER << index),
1163                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1164                 goto end;
1165         }
1166
1167         /* load the on-chip space for outbound data */
1168         char_count = info->xmit_fifo_size;
1169
1170         if (info->x_char) {     /* send special char */
1171                 outch = info->x_char;
1172                 cy_writeb(base_addr + (CyTDR << index), outch);
1173                 char_count--;
1174                 info->icount.tx++;
1175                 info->x_char = 0;
1176         }
1177
1178         if (info->breakon || info->breakoff) {
1179                 if (info->breakon) {
1180                         cy_writeb(base_addr + (CyTDR << index), 0);
1181                         cy_writeb(base_addr + (CyTDR << index), 0x81);
1182                         info->breakon = 0;
1183                         char_count -= 2;
1184                 }
1185                 if (info->breakoff) {
1186                         cy_writeb(base_addr + (CyTDR << index), 0);
1187                         cy_writeb(base_addr + (CyTDR << index), 0x83);
1188                         info->breakoff = 0;
1189                         char_count -= 2;
1190                 }
1191         }
1192
1193         while (char_count-- > 0) {
1194                 if (!info->xmit_cnt) {
1195                         if (readb(base_addr + (CySRER << index)) & CyTxMpty) {
1196                                 cy_writeb(base_addr + (CySRER << index),
1197                                         readb(base_addr + (CySRER << index)) &
1198                                                 ~CyTxMpty);
1199                         } else {
1200                                 cy_writeb(base_addr + (CySRER << index),
1201                                         (readb(base_addr + (CySRER << index)) &
1202                                                 ~CyTxRdy) | CyTxMpty);
1203                         }
1204                         goto done;
1205                 }
1206                 if (info->port.xmit_buf == NULL) {
1207                         cy_writeb(base_addr + (CySRER << index),
1208                                 readb(base_addr + (CySRER << index)) &
1209                                         ~CyTxRdy);
1210                         goto done;
1211                 }
1212                 if (tty->stopped || tty->hw_stopped) {
1213                         cy_writeb(base_addr + (CySRER << index),
1214                                 readb(base_addr + (CySRER << index)) &
1215                                         ~CyTxRdy);
1216                         goto done;
1217                 }
1218                 /* Because the Embedded Transmit Commands have been enabled,
1219                  * we must check to see if the escape character, NULL, is being
1220                  * sent. If it is, we must ensure that there is room for it to
1221                  * be doubled in the output stream.  Therefore we no longer
1222                  * advance the pointer when the character is fetched, but
1223                  * rather wait until after the check for a NULL output
1224                  * character. This is necessary because there may not be room
1225                  * for the two chars needed to send a NULL.)
1226                  */
1227                 outch = info->port.xmit_buf[info->xmit_tail];
1228                 if (outch) {
1229                         info->xmit_cnt--;
1230                         info->xmit_tail = (info->xmit_tail + 1) &
1231                                         (SERIAL_XMIT_SIZE - 1);
1232                         cy_writeb(base_addr + (CyTDR << index), outch);
1233                         info->icount.tx++;
1234                 } else {
1235                         if (char_count > 1) {
1236                                 info->xmit_cnt--;
1237                                 info->xmit_tail = (info->xmit_tail + 1) &
1238                                         (SERIAL_XMIT_SIZE - 1);
1239                                 cy_writeb(base_addr + (CyTDR << index), outch);
1240                                 cy_writeb(base_addr + (CyTDR << index), 0);
1241                                 info->icount.tx++;
1242                                 char_count--;
1243                         }
1244                 }
1245         }
1246
1247 done:
1248         tty_wakeup(tty);
1249         tty_kref_put(tty);
1250 end:
1251         /* end of service */
1252         cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
1253         cy_writeb(base_addr + (CyCAR << index), save_car);
1254 }
1255
1256 static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
1257                 void __iomem *base_addr)
1258 {
1259         struct cyclades_port *info;
1260         struct tty_struct *tty;
1261         int index = cinfo->bus_index;
1262         u8 save_xir, channel, save_car, mdm_change, mdm_status;
1263
1264         /* determine the channel & change to that context */
1265         save_xir = readb(base_addr + (CyMIR << index));
1266         channel = save_xir & CyIRChannel;
1267         info = &cinfo->ports[channel + chip * 4];
1268         save_car = readb(base_addr + (CyCAR << index));
1269         cy_writeb(base_addr + (CyCAR << index), save_xir);
1270
1271         mdm_change = readb(base_addr + (CyMISR << index));
1272         mdm_status = readb(base_addr + (CyMSVR1 << index));
1273
1274         tty = tty_port_tty_get(&info->port);
1275         if (!tty)
1276                 goto end;
1277
1278         if (mdm_change & CyANY_DELTA) {
1279                 /* For statistics only */
1280                 if (mdm_change & CyDCD)
1281                         info->icount.dcd++;
1282                 if (mdm_change & CyCTS)
1283                         info->icount.cts++;
1284                 if (mdm_change & CyDSR)
1285                         info->icount.dsr++;
1286                 if (mdm_change & CyRI)
1287                         info->icount.rng++;
1288
1289                 wake_up_interruptible(&info->delta_msr_wait);
1290         }
1291
1292         if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) {
1293                 if (!(mdm_status & CyDCD)) {
1294                         tty_hangup(tty);
1295                         info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1296                 }
1297                 wake_up_interruptible(&info->port.open_wait);
1298         }
1299         if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) {
1300                 if (tty->hw_stopped) {
1301                         if (mdm_status & CyCTS) {
1302                                 /* cy_start isn't used
1303                                    because... !!! */
1304                                 tty->hw_stopped = 0;
1305                                 cy_writeb(base_addr + (CySRER << index),
1306                                         readb(base_addr + (CySRER << index)) |
1307                                                 CyTxRdy);
1308                                 tty_wakeup(tty);
1309                         }
1310                 } else {
1311                         if (!(mdm_status & CyCTS)) {
1312                                 /* cy_stop isn't used
1313                                    because ... !!! */
1314                                 tty->hw_stopped = 1;
1315                                 cy_writeb(base_addr + (CySRER << index),
1316                                         readb(base_addr + (CySRER << index)) &
1317                                                 ~CyTxRdy);
1318                         }
1319                 }
1320         }
1321 /*      if (mdm_change & CyDSR) {
1322         }
1323         if (mdm_change & CyRI) {
1324         }*/
1325         tty_kref_put(tty);
1326 end:
1327         /* end of service */
1328         cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
1329         cy_writeb(base_addr + (CyCAR << index), save_car);
1330 }
1331
1332 /* The real interrupt service routine is called
1333    whenever the card wants its hand held--chars
1334    received, out buffer empty, modem change, etc.
1335  */
1336 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1337 {
1338         int status;
1339         struct cyclades_card *cinfo = dev_id;
1340         void __iomem *base_addr, *card_base_addr;
1341         unsigned int chip, too_many, had_work;
1342         int index;
1343
1344         if (unlikely(cinfo == NULL)) {
1345 #ifdef CY_DEBUG_INTERRUPTS
1346                 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
1347                                 irq);
1348 #endif
1349                 return IRQ_NONE;        /* spurious interrupt */
1350         }
1351
1352         card_base_addr = cinfo->base_addr;
1353         index = cinfo->bus_index;
1354
1355         /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1356         if (unlikely(card_base_addr == NULL))
1357                 return IRQ_HANDLED;
1358
1359         /* This loop checks all chips in the card.  Make a note whenever
1360            _any_ chip had some work to do, as this is considered an
1361            indication that there will be more to do.  Only when no chip
1362            has any work does this outermost loop exit.
1363          */
1364         do {
1365                 had_work = 0;
1366                 for (chip = 0; chip < cinfo->num_chips; chip++) {
1367                         base_addr = cinfo->base_addr +
1368                                         (cy_chip_offset[chip] << index);
1369                         too_many = 0;
1370                         while ((status = readb(base_addr +
1371                                                 (CySVRR << index))) != 0x00) {
1372                                 had_work++;
1373                         /* The purpose of the following test is to ensure that
1374                            no chip can monopolize the driver.  This forces the
1375                            chips to be checked in a round-robin fashion (after
1376                            draining each of a bunch (1000) of characters).
1377                          */
1378                                 if (1000 < too_many++)
1379                                         break;
1380                                 spin_lock(&cinfo->card_lock);
1381                                 if (status & CySRReceive) /* rx intr */
1382                                         cyy_chip_rx(cinfo, chip, base_addr);
1383                                 if (status & CySRTransmit) /* tx intr */
1384                                         cyy_chip_tx(cinfo, chip, base_addr);
1385                                 if (status & CySRModem) /* modem intr */
1386                                         cyy_chip_modem(cinfo, chip, base_addr);
1387                                 spin_unlock(&cinfo->card_lock);
1388                         }
1389                 }
1390         } while (had_work);
1391
1392         /* clear interrupts */
1393         spin_lock(&cinfo->card_lock);
1394         cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1395         /* Cy_ClrIntr is 0x1800 */
1396         spin_unlock(&cinfo->card_lock);
1397         return IRQ_HANDLED;
1398 }                               /* cyy_interrupt */
1399
1400 /***********************************************************/
1401 /********* End of block of Cyclom-Y specific code **********/
1402 /******** Start of block of Cyclades-Z specific code *******/
1403 /***********************************************************/
1404
1405 static int
1406 cyz_fetch_msg(struct cyclades_card *cinfo,
1407                 __u32 *channel, __u8 *cmd, __u32 *param)
1408 {
1409         struct FIRM_ID __iomem *firm_id;
1410         struct ZFW_CTRL __iomem *zfw_ctrl;
1411         struct BOARD_CTRL __iomem *board_ctrl;
1412         unsigned long loc_doorbell;
1413
1414         firm_id = cinfo->base_addr + ID_ADDRESS;
1415         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1416         board_ctrl = &zfw_ctrl->board_ctrl;
1417
1418         loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell);
1419         if (loc_doorbell) {
1420                 *cmd = (char)(0xff & loc_doorbell);
1421                 *channel = readl(&board_ctrl->fwcmd_channel);
1422                 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1423                 cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff);
1424                 return 1;
1425         }
1426         return 0;
1427 }                               /* cyz_fetch_msg */
1428
1429 static int
1430 cyz_issue_cmd(struct cyclades_card *cinfo,
1431                 __u32 channel, __u8 cmd, __u32 param)
1432 {
1433         struct FIRM_ID __iomem *firm_id;
1434         struct ZFW_CTRL __iomem *zfw_ctrl;
1435         struct BOARD_CTRL __iomem *board_ctrl;
1436         __u32 __iomem *pci_doorbell;
1437         unsigned int index;
1438
1439         firm_id = cinfo->base_addr + ID_ADDRESS;
1440         if (!cyz_is_loaded(cinfo))
1441                 return -1;
1442
1443         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1444         board_ctrl = &zfw_ctrl->board_ctrl;
1445
1446         index = 0;
1447         pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell;
1448         while ((readl(pci_doorbell) & 0xff) != 0) {
1449                 if (index++ == 1000)
1450                         return (int)(readl(pci_doorbell) & 0xff);
1451                 udelay(50L);
1452         }
1453         cy_writel(&board_ctrl->hcmd_channel, channel);
1454         cy_writel(&board_ctrl->hcmd_param, param);
1455         cy_writel(pci_doorbell, (long)cmd);
1456
1457         return 0;
1458 }                               /* cyz_issue_cmd */
1459
1460 static void cyz_handle_rx(struct cyclades_port *info, struct tty_struct *tty,
1461                 struct BUF_CTRL __iomem *buf_ctrl)
1462 {
1463         struct cyclades_card *cinfo = info->card;
1464         unsigned int char_count;
1465         int len;
1466 #ifdef BLOCKMOVE
1467         unsigned char *buf;
1468 #else
1469         char data;
1470 #endif
1471         __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1472
1473         rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1474         rx_put = readl(&buf_ctrl->rx_put);
1475         rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1476         rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1477         if (rx_put >= rx_get)
1478                 char_count = rx_put - rx_get;
1479         else
1480                 char_count = rx_put - rx_get + rx_bufsize;
1481
1482         if (char_count) {
1483 #ifdef CY_ENABLE_MONITORING
1484                 info->mon.int_count++;
1485                 info->mon.char_count += char_count;
1486                 if (char_count > info->mon.char_max)
1487                         info->mon.char_max = char_count;
1488                 info->mon.char_last = char_count;
1489 #endif
1490                 if (tty == NULL) {
1491                         /* flush received characters */
1492                         new_rx_get = (new_rx_get + char_count) &
1493                                         (rx_bufsize - 1);
1494                         info->rflush_count++;
1495                 } else {
1496 #ifdef BLOCKMOVE
1497                 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1498                    for performance, but because of buffer boundaries, there
1499                    may be several steps to the operation */
1500                         while (1) {
1501                                 len = tty_prepare_flip_string(tty, &buf,
1502                                                 char_count);
1503                                 if (!len)
1504                                         break;
1505
1506                                 len = min_t(unsigned int, min(len, char_count),
1507                                                 rx_bufsize - new_rx_get);
1508
1509                                 memcpy_fromio(buf, cinfo->base_addr +
1510                                                 rx_bufaddr + new_rx_get, len);
1511
1512                                 new_rx_get = (new_rx_get + len) &
1513                                                 (rx_bufsize - 1);
1514                                 char_count -= len;
1515                                 info->icount.rx += len;
1516                                 info->idle_stats.recv_bytes += len;
1517                         }
1518 #else
1519                         len = tty_buffer_request_room(tty, char_count);
1520                         while (len--) {
1521                                 data = readb(cinfo->base_addr + rx_bufaddr +
1522                                                 new_rx_get);
1523                                 new_rx_get = (new_rx_get + 1) &
1524                                                         (rx_bufsize - 1);
1525                                 tty_insert_flip_char(tty, data, TTY_NORMAL);
1526                                 info->idle_stats.recv_bytes++;
1527                                 info->icount.rx++;
1528                         }
1529 #endif
1530 #ifdef CONFIG_CYZ_INTR
1531                 /* Recalculate the number of chars in the RX buffer and issue
1532                    a cmd in case it's higher than the RX high water mark */
1533                         rx_put = readl(&buf_ctrl->rx_put);
1534                         if (rx_put >= rx_get)
1535                                 char_count = rx_put - rx_get;
1536                         else
1537                                 char_count = rx_put - rx_get + rx_bufsize;
1538                         if (char_count >= readl(&buf_ctrl->rx_threshold) &&
1539                                         !timer_pending(&cyz_rx_full_timer[
1540                                                         info->line]))
1541                                 mod_timer(&cyz_rx_full_timer[info->line],
1542                                                 jiffies + 1);
1543 #endif
1544                         info->idle_stats.recv_idle = jiffies;
1545                         tty_schedule_flip(tty);
1546                 }
1547                 /* Update rx_get */
1548                 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1549         }
1550 }
1551
1552 static void cyz_handle_tx(struct cyclades_port *info, struct tty_struct *tty,
1553                 struct BUF_CTRL __iomem *buf_ctrl)
1554 {
1555         struct cyclades_card *cinfo = info->card;
1556         u8 data;
1557         unsigned int char_count;
1558 #ifdef BLOCKMOVE
1559         int small_count;
1560 #endif
1561         __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1562
1563         if (info->xmit_cnt <= 0)        /* Nothing to transmit */
1564                 return;
1565
1566         tx_get = readl(&buf_ctrl->tx_get);
1567         tx_put = readl(&buf_ctrl->tx_put);
1568         tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1569         tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1570         if (tx_put >= tx_get)
1571                 char_count = tx_get - tx_put - 1 + tx_bufsize;
1572         else
1573                 char_count = tx_get - tx_put - 1;
1574
1575         if (char_count) {
1576
1577                 if (tty == NULL)
1578                         goto ztxdone;
1579
1580                 if (info->x_char) {     /* send special char */
1581                         data = info->x_char;
1582
1583                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1584                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1585                         info->x_char = 0;
1586                         char_count--;
1587                         info->icount.tx++;
1588                 }
1589 #ifdef BLOCKMOVE
1590                 while (0 < (small_count = min_t(unsigned int,
1591                                 tx_bufsize - tx_put, min_t(unsigned int,
1592                                         (SERIAL_XMIT_SIZE - info->xmit_tail),
1593                                         min_t(unsigned int, info->xmit_cnt,
1594                                                 char_count))))) {
1595
1596                         memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1597                                         tx_put),
1598                                         &info->port.xmit_buf[info->xmit_tail],
1599                                         small_count);
1600
1601                         tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1602                         char_count -= small_count;
1603                         info->icount.tx += small_count;
1604                         info->xmit_cnt -= small_count;
1605                         info->xmit_tail = (info->xmit_tail + small_count) &
1606                                         (SERIAL_XMIT_SIZE - 1);
1607                 }
1608 #else
1609                 while (info->xmit_cnt && char_count) {
1610                         data = info->port.xmit_buf[info->xmit_tail];
1611                         info->xmit_cnt--;
1612                         info->xmit_tail = (info->xmit_tail + 1) &
1613                                         (SERIAL_XMIT_SIZE - 1);
1614
1615                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1616                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1617                         char_count--;
1618                         info->icount.tx++;
1619                 }
1620 #endif
1621                 tty_wakeup(tty);
1622 ztxdone:
1623                 /* Update tx_put */
1624                 cy_writel(&buf_ctrl->tx_put, tx_put);
1625         }
1626 }
1627
1628 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1629 {
1630         struct tty_struct *tty;
1631         struct cyclades_port *info;
1632         static struct FIRM_ID __iomem *firm_id;
1633         static struct ZFW_CTRL __iomem *zfw_ctrl;
1634         static struct BOARD_CTRL __iomem *board_ctrl;
1635         static struct CH_CTRL __iomem *ch_ctrl;
1636         static struct BUF_CTRL __iomem *buf_ctrl;
1637         __u32 channel, param, fw_ver;
1638         __u8 cmd;
1639         int special_count;
1640         int delta_count;
1641
1642         firm_id = cinfo->base_addr + ID_ADDRESS;
1643         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1644         board_ctrl = &zfw_ctrl->board_ctrl;
1645         fw_ver = readl(&board_ctrl->fw_version);
1646
1647         while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1648                 special_count = 0;
1649                 delta_count = 0;
1650                 info = &cinfo->ports[channel];
1651                 tty = tty_port_tty_get(&info->port);
1652                 if (tty == NULL)
1653                         continue;
1654
1655                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1656                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1657
1658                 switch (cmd) {
1659                 case C_CM_PR_ERROR:
1660                         tty_insert_flip_char(tty, 0, TTY_PARITY);
1661                         info->icount.rx++;
1662                         special_count++;
1663                         break;
1664                 case C_CM_FR_ERROR:
1665                         tty_insert_flip_char(tty, 0, TTY_FRAME);
1666                         info->icount.rx++;
1667                         special_count++;
1668                         break;
1669                 case C_CM_RXBRK:
1670                         tty_insert_flip_char(tty, 0, TTY_BREAK);
1671                         info->icount.rx++;
1672                         special_count++;
1673                         break;
1674                 case C_CM_MDCD:
1675                         info->icount.dcd++;
1676                         delta_count++;
1677                         if (info->port.flags & ASYNC_CHECK_CD) {
1678                                 if ((fw_ver > 241 ? ((u_long) param) :
1679                                                 readl(&ch_ctrl->rs_status)) &
1680                                                 C_RS_DCD) {
1681                                         wake_up_interruptible(&info->port.open_wait);
1682                                 } else {
1683                                         tty_hangup(tty);
1684                                         wake_up_interruptible(&info->port.open_wait);
1685                                         info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1686                                 }
1687                         }
1688                         break;
1689                 case C_CM_MCTS:
1690                         info->icount.cts++;
1691                         delta_count++;
1692                         break;
1693                 case C_CM_MRI:
1694                         info->icount.rng++;
1695                         delta_count++;
1696                         break;
1697                 case C_CM_MDSR:
1698                         info->icount.dsr++;
1699                         delta_count++;
1700                         break;
1701 #ifdef Z_WAKE
1702                 case C_CM_IOCTLW:
1703                         complete(&info->shutdown_wait);
1704                         break;
1705 #endif
1706 #ifdef CONFIG_CYZ_INTR
1707                 case C_CM_RXHIWM:
1708                 case C_CM_RXNNDT:
1709                 case C_CM_INTBACK2:
1710                         /* Reception Interrupt */
1711 #ifdef CY_DEBUG_INTERRUPTS
1712                         printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1713                                         "port %ld\n", info->card, channel);
1714 #endif
1715                         cyz_handle_rx(info, tty, buf_ctrl);
1716                         break;
1717                 case C_CM_TXBEMPTY:
1718                 case C_CM_TXLOWWM:
1719                 case C_CM_INTBACK:
1720                         /* Transmission Interrupt */
1721 #ifdef CY_DEBUG_INTERRUPTS
1722                         printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1723                                         "port %ld\n", info->card, channel);
1724 #endif
1725                         cyz_handle_tx(info, tty, buf_ctrl);
1726                         break;
1727 #endif                          /* CONFIG_CYZ_INTR */
1728                 case C_CM_FATAL:
1729                         /* should do something with this !!! */
1730                         break;
1731                 default:
1732                         break;
1733                 }
1734                 if (delta_count)
1735                         wake_up_interruptible(&info->delta_msr_wait);
1736                 if (special_count)
1737                         tty_schedule_flip(tty);
1738                 tty_kref_put(tty);
1739         }
1740 }
1741
1742 #ifdef CONFIG_CYZ_INTR
1743 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1744 {
1745         struct cyclades_card *cinfo = dev_id;
1746
1747         if (unlikely(!cyz_is_loaded(cinfo))) {
1748 #ifdef CY_DEBUG_INTERRUPTS
1749                 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1750                                 "(IRQ%d).\n", irq);
1751 #endif
1752                 return IRQ_NONE;
1753         }
1754
1755         /* Handle the interrupts */
1756         cyz_handle_cmd(cinfo);
1757
1758         return IRQ_HANDLED;
1759 }                               /* cyz_interrupt */
1760
1761 static void cyz_rx_restart(unsigned long arg)
1762 {
1763         struct cyclades_port *info = (struct cyclades_port *)arg;
1764         struct cyclades_card *card = info->card;
1765         int retval;
1766         __u32 channel = info->line - card->first_line;
1767         unsigned long flags;
1768
1769         spin_lock_irqsave(&card->card_lock, flags);
1770         retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1771         if (retval != 0) {
1772                 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1773                         info->line, retval);
1774         }
1775         spin_unlock_irqrestore(&card->card_lock, flags);
1776 }
1777
1778 #else                           /* CONFIG_CYZ_INTR */
1779
1780 static void cyz_poll(unsigned long arg)
1781 {
1782         struct cyclades_card *cinfo;
1783         struct cyclades_port *info;
1784         struct FIRM_ID __iomem *firm_id;
1785         struct ZFW_CTRL __iomem *zfw_ctrl;
1786         struct BUF_CTRL __iomem *buf_ctrl;
1787         unsigned long expires = jiffies + HZ;
1788         unsigned int port, card;
1789
1790         for (card = 0; card < NR_CARDS; card++) {
1791                 cinfo = &cy_card[card];
1792
1793                 if (!cy_is_Z(cinfo))
1794                         continue;
1795                 if (!cyz_is_loaded(cinfo))
1796                         continue;
1797
1798                 firm_id = cinfo->base_addr + ID_ADDRESS;
1799                 zfw_ctrl = cinfo->base_addr +
1800                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1801
1802         /* Skip first polling cycle to avoid racing conditions with the FW */
1803                 if (!cinfo->intr_enabled) {
1804                         cinfo->intr_enabled = 1;
1805                         continue;
1806                 }
1807
1808                 cyz_handle_cmd(cinfo);
1809
1810                 for (port = 0; port < cinfo->nports; port++) {
1811                         struct tty_struct *tty;
1812
1813                         info = &cinfo->ports[port];
1814                         buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1815
1816                         tty = tty_port_tty_get(&info->port);
1817                         /* OK to pass NULL to the handle functions below.
1818                            They need to drop the data in that case. */
1819
1820                         if (!info->throttle)
1821                                 cyz_handle_rx(info, tty, buf_ctrl);
1822                         cyz_handle_tx(info, tty, buf_ctrl);
1823                         tty_kref_put(tty);
1824                 }
1825                 /* poll every 'cyz_polling_cycle' period */
1826                 expires = jiffies + cyz_polling_cycle;
1827         }
1828         mod_timer(&cyz_timerlist, expires);
1829 }                               /* cyz_poll */
1830
1831 #endif                          /* CONFIG_CYZ_INTR */
1832
1833 /********** End of block of Cyclades-Z specific code *********/
1834 /***********************************************************/
1835
1836 /* This is called whenever a port becomes active;
1837    interrupts are enabled and DTR & RTS are turned on.
1838  */
1839 static int cy_startup(struct cyclades_port *info, struct tty_struct *tty)
1840 {
1841         struct cyclades_card *card;
1842         unsigned long flags;
1843         int retval = 0;
1844         void __iomem *base_addr;
1845         int chip, channel, index;
1846         unsigned long page;
1847
1848         card = info->card;
1849         channel = info->line - card->first_line;
1850
1851         page = get_zeroed_page(GFP_KERNEL);
1852         if (!page)
1853                 return -ENOMEM;
1854
1855         spin_lock_irqsave(&card->card_lock, flags);
1856
1857         if (info->port.flags & ASYNC_INITIALIZED) {
1858                 free_page(page);
1859                 goto errout;
1860         }
1861
1862         if (!info->type) {
1863                 set_bit(TTY_IO_ERROR, &tty->flags);
1864                 free_page(page);
1865                 goto errout;
1866         }
1867
1868         if (info->port.xmit_buf)
1869                 free_page(page);
1870         else
1871                 info->port.xmit_buf = (unsigned char *)page;
1872
1873         spin_unlock_irqrestore(&card->card_lock, flags);
1874
1875         cy_set_line_char(info, tty);
1876
1877         if (!cy_is_Z(card)) {
1878                 chip = channel >> 2;
1879                 channel &= 0x03;
1880                 index = card->bus_index;
1881                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1882
1883 #ifdef CY_DEBUG_OPEN
1884                 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1885                                 "base_addr %p\n",
1886                                 card, chip, channel, base_addr);
1887 #endif
1888                 spin_lock_irqsave(&card->card_lock, flags);
1889
1890                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1891
1892                 cy_writeb(base_addr + (CyRTPR << index),
1893                         (info->default_timeout ? info->default_timeout : 0x02));
1894                 /* 10ms rx timeout */
1895
1896                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1897                                 index);
1898
1899                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1900                 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1901                 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1902
1903 #ifdef CY_DEBUG_DTR
1904                 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1905                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
1906                         readb(base_addr + (CyMSVR1 << index)),
1907                         readb(base_addr + (CyMSVR2 << index)));
1908 #endif
1909
1910                 cy_writeb(base_addr + (CySRER << index),
1911                         readb(base_addr + (CySRER << index)) | CyRxData);
1912                 info->port.flags |= ASYNC_INITIALIZED;
1913
1914                 clear_bit(TTY_IO_ERROR, &tty->flags);
1915                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1916                 info->breakon = info->breakoff = 0;
1917                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1918                 info->idle_stats.in_use =
1919                 info->idle_stats.recv_idle =
1920                 info->idle_stats.xmit_idle = jiffies;
1921
1922                 spin_unlock_irqrestore(&card->card_lock, flags);
1923
1924         } else {
1925                 struct FIRM_ID __iomem *firm_id;
1926                 struct ZFW_CTRL __iomem *zfw_ctrl;
1927                 struct BOARD_CTRL __iomem *board_ctrl;
1928                 struct CH_CTRL __iomem *ch_ctrl;
1929
1930                 base_addr = card->base_addr;
1931
1932                 firm_id = base_addr + ID_ADDRESS;
1933                 if (!cyz_is_loaded(card))
1934                         return -ENODEV;
1935
1936                 zfw_ctrl = card->base_addr +
1937                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1938                 board_ctrl = &zfw_ctrl->board_ctrl;
1939                 ch_ctrl = zfw_ctrl->ch_ctrl;
1940
1941 #ifdef CY_DEBUG_OPEN
1942                 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1943                         "base_addr %p\n", card, channel, base_addr);
1944 #endif
1945                 spin_lock_irqsave(&card->card_lock, flags);
1946
1947                 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1948 #ifdef Z_WAKE
1949 #ifdef CONFIG_CYZ_INTR
1950                 cy_writel(&ch_ctrl[channel].intr_enable,
1951                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1952                           C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1953 #else
1954                 cy_writel(&ch_ctrl[channel].intr_enable,
1955                           C_IN_IOCTLW | C_IN_MDCD);
1956 #endif                          /* CONFIG_CYZ_INTR */
1957 #else
1958 #ifdef CONFIG_CYZ_INTR
1959                 cy_writel(&ch_ctrl[channel].intr_enable,
1960                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1961                           C_IN_RXNNDT | C_IN_MDCD);
1962 #else
1963                 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
1964 #endif                          /* CONFIG_CYZ_INTR */
1965 #endif                          /* Z_WAKE */
1966
1967                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
1968                 if (retval != 0) {
1969                         printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1970                                 "%x\n", info->line, retval);
1971                 }
1972
1973                 /* Flush RX buffers before raising DTR and RTS */
1974                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
1975                 if (retval != 0) {
1976                         printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1977                                 "%x\n", info->line, retval);
1978                 }
1979
1980                 /* set timeout !!! */
1981                 /* set RTS and DTR !!! */
1982                 cy_writel(&ch_ctrl[channel].rs_control,
1983                         readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
1984                         C_RS_DTR);
1985                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
1986                 if (retval != 0) {
1987                         printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
1988                                 "%x\n", info->line, retval);
1989                 }
1990 #ifdef CY_DEBUG_DTR
1991                 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
1992 #endif
1993
1994                 /* enable send, recv, modem !!! */
1995
1996                 info->port.flags |= ASYNC_INITIALIZED;
1997                 clear_bit(TTY_IO_ERROR, &tty->flags);
1998                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1999                 info->breakon = info->breakoff = 0;
2000                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2001                 info->idle_stats.in_use =
2002                 info->idle_stats.recv_idle =
2003                 info->idle_stats.xmit_idle = jiffies;
2004
2005                 spin_unlock_irqrestore(&card->card_lock, flags);
2006         }
2007
2008 #ifdef CY_DEBUG_OPEN
2009         printk(KERN_DEBUG "cyc startup done\n");
2010 #endif
2011         return 0;
2012
2013 errout:
2014         spin_unlock_irqrestore(&card->card_lock, flags);
2015         return retval;
2016 }                               /* startup */
2017
2018 static void start_xmit(struct cyclades_port *info)
2019 {
2020         struct cyclades_card *card;
2021         unsigned long flags;
2022         void __iomem *base_addr;
2023         int chip, channel, index;
2024
2025         card = info->card;
2026         channel = info->line - card->first_line;
2027         if (!cy_is_Z(card)) {
2028                 chip = channel >> 2;
2029                 channel &= 0x03;
2030                 index = card->bus_index;
2031                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2032
2033                 spin_lock_irqsave(&card->card_lock, flags);
2034                 cy_writeb(base_addr + (CyCAR << index), channel);
2035                 cy_writeb(base_addr + (CySRER << index),
2036                         readb(base_addr + (CySRER << index)) | CyTxRdy);
2037                 spin_unlock_irqrestore(&card->card_lock, flags);
2038         } else {
2039 #ifdef CONFIG_CYZ_INTR
2040                 int retval;
2041
2042                 spin_lock_irqsave(&card->card_lock, flags);
2043                 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2044                 if (retval != 0) {
2045                         printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2046                                 "%x\n", info->line, retval);
2047                 }
2048                 spin_unlock_irqrestore(&card->card_lock, flags);
2049 #else                           /* CONFIG_CYZ_INTR */
2050                 /* Don't have to do anything at this time */
2051 #endif                          /* CONFIG_CYZ_INTR */
2052         }
2053 }                               /* start_xmit */
2054
2055 /*
2056  * This routine shuts down a serial port; interrupts are disabled,
2057  * and DTR is dropped if the hangup on close termio flag is on.
2058  */
2059 static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
2060 {
2061         struct cyclades_card *card;
2062         unsigned long flags;
2063         void __iomem *base_addr;
2064         int chip, channel, index;
2065
2066         if (!(info->port.flags & ASYNC_INITIALIZED))
2067                 return;
2068
2069         card = info->card;
2070         channel = info->line - card->first_line;
2071         if (!cy_is_Z(card)) {
2072                 chip = channel >> 2;
2073                 channel &= 0x03;
2074                 index = card->bus_index;
2075                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2076
2077 #ifdef CY_DEBUG_OPEN
2078                 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2079                                 "channel %d, base_addr %p\n",
2080                                 card, chip, channel, base_addr);
2081 #endif
2082
2083                 spin_lock_irqsave(&card->card_lock, flags);
2084
2085                 /* Clear delta_msr_wait queue to avoid mem leaks. */
2086                 wake_up_interruptible(&info->delta_msr_wait);
2087
2088                 if (info->port.xmit_buf) {
2089                         unsigned char *temp;
2090                         temp = info->port.xmit_buf;
2091                         info->port.xmit_buf = NULL;
2092                         free_page((unsigned long)temp);
2093                 }
2094                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2095                 if (tty->termios->c_cflag & HUPCL) {
2096                         cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2097                         cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2098 #ifdef CY_DEBUG_DTR
2099                         printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2100                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2101                                 readb(base_addr + (CyMSVR1 << index)),
2102                                 readb(base_addr + (CyMSVR2 << index)));
2103 #endif
2104                 }
2105                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2106                 /* it may be appropriate to clear _XMIT at
2107                    some later date (after testing)!!! */
2108
2109                 set_bit(TTY_IO_ERROR, &tty->flags);
2110                 info->port.flags &= ~ASYNC_INITIALIZED;
2111                 spin_unlock_irqrestore(&card->card_lock, flags);
2112         } else {
2113                 struct FIRM_ID __iomem *firm_id;
2114                 struct ZFW_CTRL __iomem *zfw_ctrl;
2115                 struct BOARD_CTRL __iomem *board_ctrl;
2116                 struct CH_CTRL __iomem *ch_ctrl;
2117                 int retval;
2118
2119                 base_addr = card->base_addr;
2120 #ifdef CY_DEBUG_OPEN
2121                 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2122                         "base_addr %p\n", card, channel, base_addr);
2123 #endif
2124
2125                 firm_id = base_addr + ID_ADDRESS;
2126                 if (!cyz_is_loaded(card))
2127                         return;
2128
2129                 zfw_ctrl = card->base_addr +
2130                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2131                 board_ctrl = &zfw_ctrl->board_ctrl;
2132                 ch_ctrl = zfw_ctrl->ch_ctrl;
2133
2134                 spin_lock_irqsave(&card->card_lock, flags);
2135
2136                 if (info->port.xmit_buf) {
2137                         unsigned char *temp;
2138                         temp = info->port.xmit_buf;
2139                         info->port.xmit_buf = NULL;
2140                         free_page((unsigned long)temp);
2141                 }
2142
2143                 if (tty->termios->c_cflag & HUPCL) {
2144                         cy_writel(&ch_ctrl[channel].rs_control,
2145                                 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2146                                         ~(C_RS_RTS | C_RS_DTR)));
2147                         retval = cyz_issue_cmd(info->card, channel,
2148                                         C_CM_IOCTLM, 0L);
2149                         if (retval != 0) {
2150                                 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2151                                         "was %x\n", info->line, retval);
2152                         }
2153 #ifdef CY_DEBUG_DTR
2154                         printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2155 #endif
2156                 }
2157
2158                 set_bit(TTY_IO_ERROR, &tty->flags);
2159                 info->port.flags &= ~ASYNC_INITIALIZED;
2160
2161                 spin_unlock_irqrestore(&card->card_lock, flags);
2162         }
2163
2164 #ifdef CY_DEBUG_OPEN
2165         printk(KERN_DEBUG "cyc shutdown done\n");
2166 #endif
2167 }                               /* shutdown */
2168
2169 /*
2170  * ------------------------------------------------------------
2171  * cy_open() and friends
2172  * ------------------------------------------------------------
2173  */
2174
2175 static int
2176 block_til_ready(struct tty_struct *tty, struct file *filp,
2177                 struct cyclades_port *info)
2178 {
2179         DECLARE_WAITQUEUE(wait, current);
2180         struct cyclades_card *cinfo;
2181         unsigned long flags;
2182         int chip, channel, index;
2183         int retval;
2184         void __iomem *base_addr;
2185
2186         cinfo = info->card;
2187         channel = info->line - cinfo->first_line;
2188
2189         /*
2190          * If the device is in the middle of being closed, then block
2191          * until it's done, and then try again.
2192          */
2193         if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
2194                 wait_event_interruptible(info->port.close_wait,
2195                                 !(info->port.flags & ASYNC_CLOSING));
2196                 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2197         }
2198
2199         /*
2200          * If non-blocking mode is set, then make the check up front
2201          * and then exit.
2202          */
2203         if ((filp->f_flags & O_NONBLOCK) ||
2204                                         (tty->flags & (1 << TTY_IO_ERROR))) {
2205                 info->port.flags |= ASYNC_NORMAL_ACTIVE;
2206                 return 0;
2207         }
2208
2209         /*
2210          * Block waiting for the carrier detect and the line to become
2211          * free (i.e., not in use by the callout).  While we are in
2212          * this loop, info->port.count is dropped by one, so that
2213          * cy_close() knows when to free things.  We restore it upon
2214          * exit, either normal or abnormal.
2215          */
2216         retval = 0;
2217         add_wait_queue(&info->port.open_wait, &wait);
2218 #ifdef CY_DEBUG_OPEN
2219         printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2220                 "count = %d\n", info->line, info->port.count);
2221 #endif
2222         spin_lock_irqsave(&cinfo->card_lock, flags);
2223         if (!tty_hung_up_p(filp))
2224                 info->port.count--;
2225         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2226 #ifdef CY_DEBUG_COUNT
2227         printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2228                 "%d\n", current->pid, info->port.count);
2229 #endif
2230         info->port.blocked_open++;
2231
2232         if (!cy_is_Z(cinfo)) {
2233                 chip = channel >> 2;
2234                 channel &= 0x03;
2235                 index = cinfo->bus_index;
2236                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2237
2238                 while (1) {
2239                         spin_lock_irqsave(&cinfo->card_lock, flags);
2240                         if ((tty->termios->c_cflag & CBAUD)) {
2241                                 cy_writeb(base_addr + (CyCAR << index),
2242                                           (u_char) channel);
2243                                 cy_writeb(base_addr + (CyMSVR1 << index),
2244                                           CyRTS);
2245                                 cy_writeb(base_addr + (CyMSVR2 << index),
2246                                           CyDTR);
2247 #ifdef CY_DEBUG_DTR
2248                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2249                                         "DTR\n");
2250                                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2251                                         readb(base_addr + (CyMSVR1 << index)),
2252                                         readb(base_addr + (CyMSVR2 << index)));
2253 #endif
2254                         }
2255                         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2256
2257                         set_current_state(TASK_INTERRUPTIBLE);
2258                         if (tty_hung_up_p(filp) ||
2259                                         !(info->port.flags & ASYNC_INITIALIZED)) {
2260                                 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
2261                                           -EAGAIN : -ERESTARTSYS);
2262                                 break;
2263                         }
2264
2265                         spin_lock_irqsave(&cinfo->card_lock, flags);
2266                         cy_writeb(base_addr + (CyCAR << index),
2267                                   (u_char) channel);
2268                         if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2269                                         (readb(base_addr +
2270                                                 (CyMSVR1 << index)) & CyDCD))) {
2271                                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2272                                 break;
2273                         }
2274                         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2275
2276                         if (signal_pending(current)) {
2277                                 retval = -ERESTARTSYS;
2278                                 break;
2279                         }
2280 #ifdef CY_DEBUG_OPEN
2281                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2282                                 "ttyC%d, count = %d\n",
2283                                 info->line, info->port.count);
2284 #endif
2285                         schedule();
2286                 }
2287         } else {
2288                 struct FIRM_ID __iomem *firm_id;
2289                 struct ZFW_CTRL __iomem *zfw_ctrl;
2290                 struct BOARD_CTRL __iomem *board_ctrl;
2291                 struct CH_CTRL __iomem *ch_ctrl;
2292
2293                 base_addr = cinfo->base_addr;
2294                 firm_id = base_addr + ID_ADDRESS;
2295                 if (!cyz_is_loaded(cinfo)) {
2296                         __set_current_state(TASK_RUNNING);
2297                         remove_wait_queue(&info->port.open_wait, &wait);
2298                         return -EINVAL;
2299                 }
2300
2301                 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)
2302                                                                 & 0xfffff);
2303                 board_ctrl = &zfw_ctrl->board_ctrl;
2304                 ch_ctrl = zfw_ctrl->ch_ctrl;
2305
2306                 while (1) {
2307                         if ((tty->termios->c_cflag & CBAUD)) {
2308                                 cy_writel(&ch_ctrl[channel].rs_control,
2309                                         readl(&ch_ctrl[channel].rs_control) |
2310                                         C_RS_RTS | C_RS_DTR);
2311                                 retval = cyz_issue_cmd(cinfo,
2312                                         channel, C_CM_IOCTLM, 0L);
2313                                 if (retval != 0) {
2314                                         printk(KERN_ERR "cyc:block_til_ready "
2315                                                 "retval on ttyC%d was %x\n",
2316                                                 info->line, retval);
2317                                 }
2318 #ifdef CY_DEBUG_DTR
2319                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2320                                         "Z DTR\n");
2321 #endif
2322                         }
2323
2324                         set_current_state(TASK_INTERRUPTIBLE);
2325                         if (tty_hung_up_p(filp) ||
2326                                         !(info->port.flags & ASYNC_INITIALIZED)) {
2327                                 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
2328                                           -EAGAIN : -ERESTARTSYS);
2329                                 break;
2330                         }
2331                         if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2332                                         (readl(&ch_ctrl[channel].rs_status) &
2333                                                 C_RS_DCD))) {
2334                                 break;
2335                         }
2336                         if (signal_pending(current)) {
2337                                 retval = -ERESTARTSYS;
2338                                 break;
2339                         }
2340 #ifdef CY_DEBUG_OPEN
2341                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2342                                 "ttyC%d, count = %d\n",
2343                                 info->line, info->port.count);
2344 #endif
2345                         schedule();
2346                 }
2347         }
2348         __set_current_state(TASK_RUNNING);
2349         remove_wait_queue(&info->port.open_wait, &wait);
2350         if (!tty_hung_up_p(filp)) {
2351                 info->port.count++;
2352 #ifdef CY_DEBUG_COUNT
2353                 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2354                         "count to %d\n", current->pid, info->port.count);
2355 #endif
2356         }
2357         info->port.blocked_open--;
2358 #ifdef CY_DEBUG_OPEN
2359         printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2360                 "count = %d\n", info->line, info->port.count);
2361 #endif
2362         if (retval)
2363                 return retval;
2364         info->port.flags |= ASYNC_NORMAL_ACTIVE;
2365         return 0;
2366 }                               /* block_til_ready */
2367
2368 /*
2369  * This routine is called whenever a serial port is opened.  It
2370  * performs the serial-specific initialization for the tty structure.
2371  */
2372 static int cy_open(struct tty_struct *tty, struct file *filp)
2373 {
2374         struct cyclades_port *info;
2375         unsigned int i, line;
2376         int retval;
2377
2378         line = tty->index;
2379         if (tty->index < 0 || NR_PORTS <= line)
2380                 return -ENODEV;
2381
2382         for (i = 0; i < NR_CARDS; i++)
2383                 if (line < cy_card[i].first_line + cy_card[i].nports &&
2384                                 line >= cy_card[i].first_line)
2385                         break;
2386         if (i >= NR_CARDS)
2387                 return -ENODEV;
2388         info = &cy_card[i].ports[line - cy_card[i].first_line];
2389         if (info->line < 0)
2390                 return -ENODEV;
2391
2392         /* If the card's firmware hasn't been loaded,
2393            treat it as absent from the system.  This
2394            will make the user pay attention.
2395          */
2396         if (cy_is_Z(info->card)) {
2397                 struct cyclades_card *cinfo = info->card;
2398                 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2399
2400                 if (!cyz_is_loaded(cinfo)) {
2401                         if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) &&
2402                                         readl(&firm_id->signature) ==
2403                                         ZFIRM_HLT) {
2404                                 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2405                                         "need an external power supply for "
2406                                         "this number of ports.\nFirmware "
2407                                         "halted.\n");
2408                         } else {
2409                                 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2410                                         "yet loaded\n");
2411                         }
2412                         return -ENODEV;
2413                 }
2414 #ifdef CONFIG_CYZ_INTR
2415                 else {
2416                 /* In case this Z board is operating in interrupt mode, its
2417                    interrupts should be enabled as soon as the first open
2418                    happens to one of its ports. */
2419                         if (!cinfo->intr_enabled) {
2420                                 u16 intr;
2421
2422                                 /* Enable interrupts on the PLX chip */
2423                                 intr = readw(&cinfo->ctl_addr.p9060->
2424                                                 intr_ctrl_stat) | 0x0900;
2425                                 cy_writew(&cinfo->ctl_addr.p9060->
2426                                                 intr_ctrl_stat, intr);
2427                                 /* Enable interrupts on the FW */
2428                                 retval = cyz_issue_cmd(cinfo, 0,
2429                                                 C_CM_IRQ_ENBL, 0L);
2430                                 if (retval != 0) {
2431                                         printk(KERN_ERR "cyc:IRQ enable retval "
2432                                                 "was %x\n", retval);
2433                                 }
2434                                 cinfo->intr_enabled = 1;
2435                         }
2436                 }
2437 #endif                          /* CONFIG_CYZ_INTR */
2438                 /* Make sure this Z port really exists in hardware */
2439                 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2440                         return -ENODEV;
2441         }
2442 #ifdef CY_DEBUG_OTHER
2443         printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2444 #endif
2445         tty->driver_data = info;
2446         if (serial_paranoia_check(info, tty->name, "cy_open"))
2447                 return -ENODEV;
2448
2449 #ifdef CY_DEBUG_OPEN
2450         printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2451                         info->port.count);
2452 #endif
2453         info->port.count++;
2454 #ifdef CY_DEBUG_COUNT
2455         printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2456                 current->pid, info->port.count);
2457 #endif
2458
2459         /*
2460          * If the port is the middle of closing, bail out now
2461          */
2462         if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
2463                 wait_event_interruptible(info->port.close_wait,
2464                                 !(info->port.flags & ASYNC_CLOSING));
2465                 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2466         }
2467
2468         /*
2469          * Start up serial port
2470          */
2471         retval = cy_startup(info, tty);
2472         if (retval)
2473                 return retval;
2474
2475         retval = block_til_ready(tty, filp, info);
2476         if (retval) {
2477 #ifdef CY_DEBUG_OPEN
2478                 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2479                         "with %d\n", retval);
2480 #endif
2481                 return retval;
2482         }
2483
2484         info->throttle = 0;
2485         tty_port_tty_set(&info->port, tty);
2486
2487 #ifdef CY_DEBUG_OPEN
2488         printk(KERN_DEBUG "cyc:cy_open done\n");
2489 #endif
2490         return 0;
2491 }                               /* cy_open */
2492
2493 /*
2494  * cy_wait_until_sent() --- wait until the transmitter is empty
2495  */
2496 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2497 {
2498         struct cyclades_card *card;
2499         struct cyclades_port *info = tty->driver_data;
2500         void __iomem *base_addr;
2501         int chip, channel, index;
2502         unsigned long orig_jiffies;
2503         int char_time;
2504
2505         if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2506                 return;
2507
2508         if (info->xmit_fifo_size == 0)
2509                 return;         /* Just in case.... */
2510
2511         orig_jiffies = jiffies;
2512         lock_kernel();
2513         /*
2514          * Set the check interval to be 1/5 of the estimated time to
2515          * send a single character, and make it at least 1.  The check
2516          * interval should also be less than the timeout.
2517          *
2518          * Note: we have to use pretty tight timings here to satisfy
2519          * the NIST-PCTS.
2520          */
2521         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2522         char_time = char_time / 5;
2523         if (char_time <= 0)
2524                 char_time = 1;
2525         if (timeout < 0)
2526                 timeout = 0;
2527         if (timeout)
2528                 char_time = min(char_time, timeout);
2529         /*
2530          * If the transmitter hasn't cleared in twice the approximate
2531          * amount of time to send the entire FIFO, it probably won't
2532          * ever clear.  This assumes the UART isn't doing flow
2533          * control, which is currently the case.  Hence, if it ever
2534          * takes longer than info->timeout, this is probably due to a
2535          * UART bug of some kind.  So, we clamp the timeout parameter at
2536          * 2*info->timeout.
2537          */
2538         if (!timeout || timeout > 2 * info->timeout)
2539                 timeout = 2 * info->timeout;
2540 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2541         printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2542                 timeout, char_time, jiffies);
2543 #endif
2544         card = info->card;
2545         channel = (info->line) - (card->first_line);
2546         if (!cy_is_Z(card)) {
2547                 chip = channel >> 2;
2548                 channel &= 0x03;
2549                 index = card->bus_index;
2550                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2551                 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2552 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2553                         printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2554 #endif
2555                         if (msleep_interruptible(jiffies_to_msecs(char_time)))
2556                                 break;
2557                         if (timeout && time_after(jiffies, orig_jiffies +
2558                                         timeout))
2559                                 break;
2560                 }
2561         }
2562         /* Run one more char cycle */
2563         msleep_interruptible(jiffies_to_msecs(char_time * 5));
2564         unlock_kernel();
2565 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2566         printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2567 #endif
2568 }
2569
2570 static void cy_flush_buffer(struct tty_struct *tty)
2571 {
2572         struct cyclades_port *info = tty->driver_data;
2573         struct cyclades_card *card;
2574         int channel, retval;
2575         unsigned long flags;
2576
2577 #ifdef CY_DEBUG_IO
2578         printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
2579 #endif
2580
2581         if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
2582                 return;
2583
2584         card = info->card;
2585         channel = info->line - card->first_line;
2586
2587         spin_lock_irqsave(&card->card_lock, flags);
2588         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2589         spin_unlock_irqrestore(&card->card_lock, flags);
2590
2591         if (cy_is_Z(card)) {    /* If it is a Z card, flush the on-board
2592                                            buffers as well */
2593                 spin_lock_irqsave(&card->card_lock, flags);
2594                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
2595                 if (retval != 0) {
2596                         printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
2597                                 "was %x\n", info->line, retval);
2598                 }
2599                 spin_unlock_irqrestore(&card->card_lock, flags);
2600         }
2601         tty_wakeup(tty);
2602 }                               /* cy_flush_buffer */
2603
2604
2605 /*
2606  * This routine is called when a particular tty device is closed.
2607  */
2608 static void cy_close(struct tty_struct *tty, struct file *filp)
2609 {
2610         struct cyclades_port *info = tty->driver_data;
2611         struct cyclades_card *card;
2612         unsigned long flags;
2613
2614 #ifdef CY_DEBUG_OTHER
2615         printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2616 #endif
2617
2618         if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
2619                 return;
2620
2621         card = info->card;
2622
2623         spin_lock_irqsave(&card->card_lock, flags);
2624         /* If the TTY is being hung up, nothing to do */
2625         if (tty_hung_up_p(filp)) {
2626                 spin_unlock_irqrestore(&card->card_lock, flags);
2627                 return;
2628         }
2629 #ifdef CY_DEBUG_OPEN
2630         printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2631                 info->port.count);
2632 #endif
2633         if ((tty->count == 1) && (info->port.count != 1)) {
2634                 /*
2635                  * Uh, oh.  tty->count is 1, which means that the tty
2636                  * structure will be freed.  Info->count should always
2637                  * be one in these conditions.  If it's greater than
2638                  * one, we've got real problems, since it means the
2639                  * serial port won't be shutdown.
2640                  */
2641                 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2642                         "tty->count is 1, info->port.count is %d\n", info->port.count);
2643                 info->port.count = 1;
2644         }
2645 #ifdef CY_DEBUG_COUNT
2646         printk(KERN_DEBUG  "cyc:cy_close at (%d): decrementing count to %d\n",
2647                 current->pid, info->port.count - 1);
2648 #endif
2649         if (--info->port.count < 0) {
2650 #ifdef CY_DEBUG_COUNT
2651                 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2652 #endif
2653                 info->port.count = 0;
2654         }
2655         if (info->port.count) {
2656                 spin_unlock_irqrestore(&card->card_lock, flags);
2657                 return;
2658         }
2659         info->port.flags |= ASYNC_CLOSING;
2660
2661         /*
2662          * Now we wait for the transmit buffer to clear; and we notify
2663          * the line discipline to only process XON/XOFF characters.
2664          */
2665         tty->closing = 1;
2666         spin_unlock_irqrestore(&card->card_lock, flags);
2667         if (info->port.closing_wait != CY_CLOSING_WAIT_NONE)
2668                 tty_wait_until_sent(tty, info->port.closing_wait);
2669
2670         spin_lock_irqsave(&card->card_lock, flags);
2671
2672         if (!cy_is_Z(card)) {
2673                 int channel = info->line - card->first_line;
2674                 int index = card->bus_index;
2675                 void __iomem *base_addr = card->base_addr +
2676                         (cy_chip_offset[channel >> 2] << index);
2677                 /* Stop accepting input */
2678                 channel &= 0x03;
2679                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2680                 cy_writeb(base_addr + (CySRER << index),
2681                           readb(base_addr + (CySRER << index)) & ~CyRxData);
2682                 if (info->port.flags & ASYNC_INITIALIZED) {
2683                         /* Waiting for on-board buffers to be empty before
2684                            closing the port */
2685                         spin_unlock_irqrestore(&card->card_lock, flags);
2686                         cy_wait_until_sent(tty, info->timeout);
2687                         spin_lock_irqsave(&card->card_lock, flags);
2688                 }
2689         } else {
2690 #ifdef Z_WAKE
2691                 /* Waiting for on-board buffers to be empty before closing
2692                    the port */
2693                 void __iomem *base_addr = card->base_addr;
2694                 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2695                 struct ZFW_CTRL __iomem *zfw_ctrl =
2696                     base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2697                 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2698                 int channel = info->line - card->first_line;
2699                 int retval;
2700
2701                 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2702                         retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2703                         if (retval != 0) {
2704                                 printk(KERN_DEBUG "cyc:cy_close retval on "
2705                                         "ttyC%d was %x\n", info->line, retval);
2706                         }
2707                         spin_unlock_irqrestore(&card->card_lock, flags);
2708                         wait_for_completion_interruptible(&info->shutdown_wait);
2709                         spin_lock_irqsave(&card->card_lock, flags);
2710                 }
2711 #endif
2712         }
2713
2714         spin_unlock_irqrestore(&card->card_lock, flags);
2715         cy_shutdown(info, tty);
2716         cy_flush_buffer(tty);
2717         tty_ldisc_flush(tty);
2718         spin_lock_irqsave(&card->card_lock, flags);
2719
2720         tty->closing = 0;
2721         tty_port_tty_set(&info->port, NULL);
2722         if (info->port.blocked_open) {
2723                 spin_unlock_irqrestore(&card->card_lock, flags);
2724                 if (info->port.close_delay) {
2725                         msleep_interruptible(jiffies_to_msecs
2726                                                 (info->port.close_delay));
2727                 }
2728                 wake_up_interruptible(&info->port.open_wait);
2729                 spin_lock_irqsave(&card->card_lock, flags);
2730         }
2731         info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2732         wake_up_interruptible(&info->port.close_wait);
2733
2734 #ifdef CY_DEBUG_OTHER
2735         printk(KERN_DEBUG "cyc:cy_close done\n");
2736 #endif
2737
2738         spin_unlock_irqrestore(&card->card_lock, flags);
2739 }                               /* cy_close */
2740
2741 /* This routine gets called when tty_write has put something into
2742  * the write_queue.  The characters may come from user space or
2743  * kernel space.
2744  *
2745  * This routine will return the number of characters actually
2746  * accepted for writing.
2747  *
2748  * If the port is not already transmitting stuff, start it off by
2749  * enabling interrupts.  The interrupt service routine will then
2750  * ensure that the characters are sent.
2751  * If the port is already active, there is no need to kick it.
2752  *
2753  */
2754 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2755 {
2756         struct cyclades_port *info = tty->driver_data;
2757         unsigned long flags;
2758         int c, ret = 0;
2759
2760 #ifdef CY_DEBUG_IO
2761         printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2762 #endif
2763
2764         if (serial_paranoia_check(info, tty->name, "cy_write"))
2765                 return 0;
2766
2767         if (!info->port.xmit_buf)
2768                 return 0;
2769
2770         spin_lock_irqsave(&info->card->card_lock, flags);
2771         while (1) {
2772                 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
2773                 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
2774
2775                 if (c <= 0)
2776                         break;
2777
2778                 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
2779                 info->xmit_head = (info->xmit_head + c) &
2780                         (SERIAL_XMIT_SIZE - 1);
2781                 info->xmit_cnt += c;
2782                 buf += c;
2783                 count -= c;
2784                 ret += c;
2785         }
2786         spin_unlock_irqrestore(&info->card->card_lock, flags);
2787
2788         info->idle_stats.xmit_bytes += ret;
2789         info->idle_stats.xmit_idle = jiffies;
2790
2791         if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
2792                 start_xmit(info);
2793
2794         return ret;
2795 }                               /* cy_write */
2796
2797 /*
2798  * This routine is called by the kernel to write a single
2799  * character to the tty device.  If the kernel uses this routine,
2800  * it must call the flush_chars() routine (if defined) when it is
2801  * done stuffing characters into the driver.  If there is no room
2802  * in the queue, the character is ignored.
2803  */
2804 static int cy_put_char(struct tty_struct *tty, unsigned char ch)
2805 {
2806         struct cyclades_port *info = tty->driver_data;
2807         unsigned long flags;
2808
2809 #ifdef CY_DEBUG_IO
2810         printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2811 #endif
2812
2813         if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2814                 return 0;
2815
2816         if (!info->port.xmit_buf)
2817                 return 0;
2818
2819         spin_lock_irqsave(&info->card->card_lock, flags);
2820         if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2821                 spin_unlock_irqrestore(&info->card->card_lock, flags);
2822                 return 0;
2823         }
2824
2825         info->port.xmit_buf[info->xmit_head++] = ch;
2826         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2827         info->xmit_cnt++;
2828         info->idle_stats.xmit_bytes++;
2829         info->idle_stats.xmit_idle = jiffies;
2830         spin_unlock_irqrestore(&info->card->card_lock, flags);
2831         return 1;
2832 }                               /* cy_put_char */
2833
2834 /*
2835  * This routine is called by the kernel after it has written a
2836  * series of characters to the tty device using put_char().
2837  */
2838 static void cy_flush_chars(struct tty_struct *tty)
2839 {
2840         struct cyclades_port *info = tty->driver_data;
2841
2842 #ifdef CY_DEBUG_IO
2843         printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2844 #endif
2845
2846         if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2847                 return;
2848
2849         if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2850                         !info->port.xmit_buf)
2851                 return;
2852
2853         start_xmit(info);
2854 }                               /* cy_flush_chars */
2855
2856 /*
2857  * This routine returns the numbers of characters the tty driver
2858  * will accept for queuing to be written.  This number is subject
2859  * to change as output buffers get emptied, or if the output flow
2860  * control is activated.
2861  */
2862 static int cy_write_room(struct tty_struct *tty)
2863 {
2864         struct cyclades_port *info = tty->driver_data;
2865         int ret;
2866
2867 #ifdef CY_DEBUG_IO
2868         printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2869 #endif
2870
2871         if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2872                 return 0;
2873         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2874         if (ret < 0)
2875                 ret = 0;
2876         return ret;
2877 }                               /* cy_write_room */
2878
2879 static int cy_chars_in_buffer(struct tty_struct *tty)
2880 {
2881         struct cyclades_card *card;
2882         struct cyclades_port *info = tty->driver_data;
2883         int channel;
2884
2885         if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2886                 return 0;
2887
2888         card = info->card;
2889         channel = (info->line) - (card->first_line);
2890
2891 #ifdef Z_EXT_CHARS_IN_BUFFER
2892         if (!cy_is_Z(card)) {
2893 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
2894 #ifdef CY_DEBUG_IO
2895                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2896                         info->line, info->xmit_cnt);
2897 #endif
2898                 return info->xmit_cnt;
2899 #ifdef Z_EXT_CHARS_IN_BUFFER
2900         } else {
2901                 static struct FIRM_ID *firm_id;
2902                 static struct ZFW_CTRL *zfw_ctrl;
2903                 static struct CH_CTRL *ch_ctrl;
2904                 static struct BUF_CTRL *buf_ctrl;
2905                 int char_count;
2906                 __u32 tx_put, tx_get, tx_bufsize;
2907
2908                 lock_kernel();
2909                 firm_id = card->base_addr + ID_ADDRESS;
2910                 zfw_ctrl = card->base_addr +
2911                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2912                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2913                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2914
2915                 tx_get = readl(&buf_ctrl->tx_get);
2916                 tx_put = readl(&buf_ctrl->tx_put);
2917                 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
2918                 if (tx_put >= tx_get)
2919                         char_count = tx_put - tx_get;
2920                 else
2921                         char_count = tx_put - tx_get + tx_bufsize;
2922 #ifdef CY_DEBUG_IO
2923                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2924                         info->line, info->xmit_cnt + char_count);
2925 #endif
2926                 unlock_kernel();
2927                 return info->xmit_cnt + char_count;
2928         }
2929 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
2930 }                               /* cy_chars_in_buffer */
2931
2932 /*
2933  * ------------------------------------------------------------
2934  * cy_ioctl() and friends
2935  * ------------------------------------------------------------
2936  */
2937
2938 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
2939 {
2940         int co, co_val, bpr;
2941         __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
2942                         25000000);
2943
2944         if (baud == 0) {
2945                 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2946                 return;
2947         }
2948
2949         /* determine which prescaler to use */
2950         for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2951                 if (cy_clock / co_val / baud > 63)
2952                         break;
2953         }
2954
2955         bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2956         if (bpr > 255)
2957                 bpr = 255;
2958
2959         info->tbpr = info->rbpr = bpr;
2960         info->tco = info->rco = co;
2961 }
2962
2963 /*
2964  * This routine finds or computes the various line characteristics.
2965  * It used to be called config_setup
2966  */
2967 static void cy_set_line_char(struct cyclades_port *info, struct tty_struct *tty)
2968 {
2969         struct cyclades_card *card;
2970         unsigned long flags;
2971         void __iomem *base_addr;
2972         int chip, channel, index;
2973         unsigned cflag, iflag;
2974         int baud, baud_rate = 0;
2975         int i;
2976
2977         if (!tty->termios) /* XXX can this happen at all? */
2978                 return;
2979
2980         if (info->line == -1)
2981                 return;
2982
2983         cflag = tty->termios->c_cflag;
2984         iflag = tty->termios->c_iflag;
2985
2986         /*
2987          * Set up the tty->alt_speed kludge
2988          */
2989         if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2990                 tty->alt_speed = 57600;
2991         if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2992                 tty->alt_speed = 115200;
2993         if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2994                 tty->alt_speed = 230400;
2995         if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2996                 tty->alt_speed = 460800;
2997
2998         card = info->card;
2999         channel = info->line - card->first_line;
3000
3001         if (!cy_is_Z(card)) {
3002
3003                 index = card->bus_index;
3004
3005                 /* baud rate */
3006                 baud = tty_get_baud_rate(tty);
3007                 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3008                                 ASYNC_SPD_CUST) {
3009                         if (info->custom_divisor)
3010                                 baud_rate = info->baud / info->custom_divisor;
3011                         else
3012                                 baud_rate = info->baud;
3013                 } else if (baud > CD1400_MAX_SPEED) {
3014                         baud = CD1400_MAX_SPEED;
3015                 }
3016                 /* find the baud index */
3017                 for (i = 0; i < 20; i++) {
3018                         if (baud == baud_table[i])
3019                                 break;
3020                 }
3021                 if (i == 20)
3022                         i = 19; /* CD1400_MAX_SPEED */
3023
3024                 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3025                                 ASYNC_SPD_CUST) {
3026                         cyy_baud_calc(info, baud_rate);
3027                 } else {
3028                         if (info->chip_rev >= CD1400_REV_J) {
3029                                 /* It is a CD1400 rev. J or later */
3030                                 info->tbpr = baud_bpr_60[i];    /* Tx BPR */
3031                                 info->tco = baud_co_60[i];      /* Tx CO */
3032                                 info->rbpr = baud_bpr_60[i];    /* Rx BPR */
3033                                 info->rco = baud_co_60[i];      /* Rx CO */
3034                         } else {
3035                                 info->tbpr = baud_bpr_25[i];    /* Tx BPR */
3036                                 info->tco = baud_co_25[i];      /* Tx CO */
3037                                 info->rbpr = baud_bpr_25[i];    /* Rx BPR */
3038                                 info->rco = baud_co_25[i];      /* Rx CO */
3039                         }
3040                 }
3041                 if (baud_table[i] == 134) {
3042                         /* get it right for 134.5 baud */
3043                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3044                                         2;
3045                 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3046                                 ASYNC_SPD_CUST) {
3047                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3048                                         baud_rate) + 2;
3049                 } else if (baud_table[i]) {
3050                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3051                                         baud_table[i]) + 2;
3052                         /* this needs to be propagated into the card info */
3053                 } else {
3054                         info->timeout = 0;
3055                 }
3056                 /* By tradition (is it a standard?) a baud rate of zero
3057                    implies the line should be/has been closed.  A bit
3058                    later in this routine such a test is performed. */
3059
3060                 /* byte size and parity */
3061                 info->cor5 = 0;
3062                 info->cor4 = 0;
3063                 /* receive threshold */
3064                 info->cor3 = (info->default_threshold ?
3065                                 info->default_threshold : baud_cor3[i]);
3066                 info->cor2 = CyETC;
3067                 switch (cflag & CSIZE) {
3068                 case CS5:
3069                         info->cor1 = Cy_5_BITS;
3070                         break;
3071                 case CS6:
3072                         info->cor1 = Cy_6_BITS;
3073                         break;
3074                 case CS7:
3075                         info->cor1 = Cy_7_BITS;
3076                         break;
3077                 case CS8:
3078                         info->cor1 = Cy_8_BITS;
3079                         break;
3080                 }
3081                 if (cflag & CSTOPB)
3082                         info->cor1 |= Cy_2_STOP;
3083
3084                 if (cflag & PARENB) {
3085                         if (cflag & PARODD)
3086                                 info->cor1 |= CyPARITY_O;
3087                         else
3088                                 info->cor1 |= CyPARITY_E;
3089                 } else
3090                         info->cor1 |= CyPARITY_NONE;
3091
3092                 /* CTS flow control flag */
3093                 if (cflag & CRTSCTS) {
3094                         info->port.flags |= ASYNC_CTS_FLOW;
3095                         info->cor2 |= CyCtsAE;
3096                 } else {
3097                         info->port.flags &= ~ASYNC_CTS_FLOW;
3098                         info->cor2 &= ~CyCtsAE;
3099                 }
3100                 if (cflag & CLOCAL)
3101                         info->port.flags &= ~ASYNC_CHECK_CD;
3102                 else
3103                         info->port.flags |= ASYNC_CHECK_CD;
3104
3105          /***********************************************
3106             The hardware option, CyRtsAO, presents RTS when
3107             the chip has characters to send.  Since most modems
3108             use RTS as reverse (inbound) flow control, this
3109             option is not used.  If inbound flow control is
3110             necessary, DTR can be programmed to provide the
3111             appropriate signals for use with a non-standard
3112             cable.  Contact Marcio Saito for details.
3113          ***********************************************/
3114
3115                 chip = channel >> 2;
3116                 channel &= 0x03;
3117                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3118
3119                 spin_lock_irqsave(&card->card_lock, flags);
3120                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3121
3122                 /* tx and rx baud rate */
3123
3124                 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3125                 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3126                 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3127                 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3128
3129                 /* set line characteristics  according configuration */
3130
3131                 cy_writeb(base_addr + (CySCHR1 << index), START_CHAR(tty));
3132                 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(tty));
3133                 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3134                 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3135                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3136                 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3137                 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3138
3139                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3140                                 CyCOR3ch, index);
3141
3142                 /* !!! Is this needed? */
3143                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3144                 cy_writeb(base_addr + (CyRTPR << index),
3145                         (info->default_timeout ? info->default_timeout : 0x02));
3146                 /* 10ms rx timeout */
3147
3148                 if (C_CLOCAL(tty)) {
3149                         /* without modem intr */
3150                         cy_writeb(base_addr + (CySRER << index),
3151                                 readb(base_addr + (CySRER << index)) | CyMdmCh);
3152                         /* act on 1->0 modem transitions */
3153                         if ((cflag & CRTSCTS) && info->rflow) {
3154                                 cy_writeb(base_addr + (CyMCOR1 << index),
3155                                           (CyCTS | rflow_thr[i]));
3156                         } else {
3157                                 cy_writeb(base_addr + (CyMCOR1 << index),
3158                                           CyCTS);
3159                         }
3160                         /* act on 0->1 modem transitions */
3161                         cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3162                 } else {
3163                         /* without modem intr */
3164                         cy_writeb(base_addr + (CySRER << index),
3165                                   readb(base_addr +
3166                                            (CySRER << index)) | CyMdmCh);
3167                         /* act on 1->0 modem transitions */
3168                         if ((cflag & CRTSCTS) && info->rflow) {
3169                                 cy_writeb(base_addr + (CyMCOR1 << index),
3170                                           (CyDSR | CyCTS | CyRI | CyDCD |
3171                                            rflow_thr[i]));
3172                         } else {
3173                                 cy_writeb(base_addr + (CyMCOR1 << index),
3174                                           CyDSR | CyCTS | CyRI | CyDCD);
3175                         }
3176                         /* act on 0->1 modem transitions */
3177                         cy_writeb(base_addr + (CyMCOR2 << index),
3178                                   CyDSR | CyCTS | CyRI | CyDCD);
3179                 }
3180
3181                 if (i == 0) {   /* baud rate is zero, turn off line */
3182                         if (info->rtsdtr_inv) {
3183                                 cy_writeb(base_addr + (CyMSVR1 << index),
3184                                           ~CyRTS);
3185                         } else {
3186                                 cy_writeb(base_addr + (CyMSVR2 << index),
3187                                           ~CyDTR);
3188                         }
3189 #ifdef CY_DEBUG_DTR
3190                         printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3191                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3192                                 readb(base_addr + (CyMSVR1 << index)),
3193                                 readb(base_addr + (CyMSVR2 << index)));
3194 #endif
3195                 } else {
3196                         if (info->rtsdtr_inv) {
3197                                 cy_writeb(base_addr + (CyMSVR1 << index),
3198                                           CyRTS);
3199                         } else {
3200                                 cy_writeb(base_addr + (CyMSVR2 << index),
3201                                           CyDTR);
3202                         }
3203 #ifdef CY_DEBUG_DTR
3204                         printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3205                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3206                                 readb(base_addr + (CyMSVR1 << index)),
3207                                 readb(base_addr + (CyMSVR2 << index)));
3208 #endif
3209                 }
3210
3211                 clear_bit(TTY_IO_ERROR, &tty->flags);
3212                 spin_unlock_irqrestore(&card->card_lock, flags);
3213
3214         } else {
3215                 struct FIRM_ID __iomem *firm_id;
3216                 struct ZFW_CTRL __iomem *zfw_ctrl;
3217                 struct CH_CTRL __iomem *ch_ctrl;
3218                 __u32 sw_flow;
3219                 int retval;
3220
3221                 firm_id = card->base_addr + ID_ADDRESS;
3222                 if (!cyz_is_loaded(card))
3223                         return;
3224
3225                 zfw_ctrl = card->base_addr +
3226                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3227                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3228
3229                 /* baud rate */
3230                 baud = tty_get_baud_rate(tty);
3231                 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3232                                 ASYNC_SPD_CUST) {
3233                         if (info->custom_divisor)
3234                                 baud_rate = info->baud / info->custom_divisor;
3235                         else
3236                                 baud_rate = info->baud;
3237                 } else if (baud > CYZ_MAX_SPEED) {
3238                         baud = CYZ_MAX_SPEED;
3239                 }
3240                 cy_writel(&ch_ctrl->comm_baud, baud);
3241
3242                 if (baud == 134) {
3243                         /* get it right for 134.5 baud */
3244                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3245                                         2;
3246                 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
3247                                 ASYNC_SPD_CUST) {
3248                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3249                                         baud_rate) + 2;
3250                 } else if (baud) {
3251                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3252                                         baud) + 2;
3253                         /* this needs to be propagated into the card info */
3254                 } else {
3255                         info->timeout = 0;
3256                 }
3257
3258                 /* byte size and parity */
3259                 switch (cflag & CSIZE) {
3260                 case CS5:
3261                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3262                         break;
3263                 case CS6:
3264                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3265                         break;
3266                 case CS7:
3267                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3268                         break;
3269                 case CS8:
3270                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3271                         break;
3272                 }
3273                 if (cflag & CSTOPB) {
3274                         cy_writel(&ch_ctrl->comm_data_l,
3275                                   readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3276                 } else {
3277                         cy_writel(&ch_ctrl->comm_data_l,
3278                                   readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3279                 }
3280                 if (cflag & PARENB) {
3281                         if (cflag & PARODD)
3282                                 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3283                         else
3284                                 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3285                 } else
3286                         cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3287
3288                 /* CTS flow control flag */
3289                 if (cflag & CRTSCTS) {
3290                         cy_writel(&ch_ctrl->hw_flow,
3291                                 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3292                 } else {
3293                         cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3294                                         ~(C_RS_CTS | C_RS_RTS));
3295                 }
3296                 /* As the HW flow control is done in firmware, the driver
3297                    doesn't need to care about it */
3298                 info->port.flags &= ~ASYNC_CTS_FLOW;
3299
3300                 /* XON/XOFF/XANY flow control flags */
3301                 sw_flow = 0;
3302                 if (iflag & IXON) {
3303                         sw_flow |= C_FL_OXX;
3304                         if (iflag & IXANY)
3305                                 sw_flow |= C_FL_OIXANY;
3306                 }
3307                 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3308
3309                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3310                 if (retval != 0) {
3311                         printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3312                                 "was %x\n", info->line, retval);
3313                 }
3314
3315                 /* CD sensitivity */
3316                 if (cflag & CLOCAL)
3317                         info->port.flags &= ~ASYNC_CHECK_CD;
3318                 else
3319                         info->port.flags |= ASYNC_CHECK_CD;
3320
3321                 if (baud == 0) {        /* baud rate is zero, turn off line */
3322                         cy_writel(&ch_ctrl->rs_control,
3323                                   readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3324 #ifdef CY_DEBUG_DTR
3325                         printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3326 #endif
3327                 } else {
3328                         cy_writel(&ch_ctrl->rs_control,
3329                                   readl(&ch_ctrl->rs_control) | C_RS_DTR);
3330 #ifdef CY_DEBUG_DTR
3331                         printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3332 #endif
3333                 }
3334
3335                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3336                 if (retval != 0) {
3337                         printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3338                                 "was %x\n", info->line, retval);
3339                 }
3340
3341                 clear_bit(TTY_IO_ERROR, &tty->flags);
3342         }
3343 }                               /* set_line_char */
3344
3345 static int
3346 get_serial_info(struct cyclades_port *info,
3347                 struct serial_struct __user *retinfo)
3348 {
3349         struct serial_struct tmp;
3350         struct cyclades_card *cinfo = info->card;
3351
3352         if (!retinfo)
3353                 return -EFAULT;
3354         memset(&tmp, 0, sizeof(tmp));
3355         tmp.type = info->type;
3356         tmp.line = info->line;
3357         tmp.port = (info->card - cy_card) * 0x100 + info->line -
3358                 cinfo->first_line;
3359         tmp.irq = cinfo->irq;
3360         tmp.flags = info->port.flags;
3361         tmp.close_delay = info->port.close_delay;
3362         tmp.closing_wait = info->port.closing_wait;
3363         tmp.baud_base = info->baud;
3364         tmp.custom_divisor = info->custom_divisor;
3365         tmp.hub6 = 0;           /*!!! */
3366         return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3367 }                               /* get_serial_info */
3368
3369 static int
3370 cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty,
3371                 struct serial_struct __user *new_info)
3372 {
3373         struct serial_struct new_serial;
3374         struct cyclades_port old_info;
3375
3376         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3377                 return -EFAULT;
3378         old_info = *info;
3379
3380         if (!capable(CAP_SYS_ADMIN)) {
3381                 if (new_serial.close_delay != info->port.close_delay ||
3382                                 new_serial.baud_base != info->baud ||
3383                                 (new_serial.flags & ASYNC_FLAGS &
3384                                         ~ASYNC_USR_MASK) !=
3385                                 (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3386                         return -EPERM;
3387                 info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
3388                                 (new_serial.flags & ASYNC_USR_MASK);
3389                 info->baud = new_serial.baud_base;
3390                 info->custom_divisor = new_serial.custom_divisor;
3391                 goto check_and_exit;
3392         }
3393
3394         /*
3395          * OK, past this point, all the error checking has been done.
3396          * At this point, we start making changes.....
3397          */
3398
3399         info->baud = new_serial.baud_base;
3400         info->custom_divisor = new_serial.custom_divisor;
3401         info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
3402                         (new_serial.flags & ASYNC_FLAGS);
3403         info->port.close_delay = new_serial.close_delay * HZ / 100;
3404         info->port.closing_wait = new_serial.closing_wait * HZ / 100;
3405
3406 check_and_exit:
3407         if (info->port.flags & ASYNC_INITIALIZED) {
3408                 cy_set_line_char(info, tty);
3409                 return 0;
3410         } else {
3411                 return cy_startup(info, tty);
3412         }
3413 }                               /* set_serial_info */
3414
3415 /*
3416  * get_lsr_info - get line status register info
3417  *
3418  * Purpose: Let user call ioctl() to get info when the UART physically
3419  *          is emptied.  On bus types like RS485, the transmitter must
3420  *          release the bus after transmitting. This must be done when
3421  *          the transmit shift register is empty, not be done when the
3422  *          transmit holding register is empty.  This functionality
3423  *          allows an RS485 driver to be written in user space.
3424  */
3425 static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
3426 {
3427         struct cyclades_card *card;
3428         int chip, channel, index;
3429         unsigned char status;
3430         unsigned int result;
3431         unsigned long flags;
3432         void __iomem *base_addr;
3433
3434         card = info->card;
3435         channel = (info->line) - (card->first_line);
3436         if (!cy_is_Z(card)) {
3437                 chip = channel >> 2;
3438                 channel &= 0x03;
3439                 index = card->bus_index;
3440                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3441
3442                 spin_lock_irqsave(&card->card_lock, flags);
3443                 status = readb(base_addr + (CySRER << index)) &
3444                                 (CyTxRdy | CyTxMpty);
3445                 spin_unlock_irqrestore(&card->card_lock, flags);
3446                 result = (status ? 0 : TIOCSER_TEMT);
3447         } else {
3448                 /* Not supported yet */
3449                 return -EINVAL;
3450         }
3451         return put_user(result, (unsigned long __user *)value);
3452 }
3453
3454 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3455 {
3456         struct cyclades_port *info = tty->driver_data;
3457         struct cyclades_card *card;
3458         int chip, channel, index;
3459         void __iomem *base_addr;
3460         unsigned long flags;
3461         unsigned char status;
3462         unsigned long lstatus;
3463         unsigned int result;
3464         struct FIRM_ID __iomem *firm_id;
3465         struct ZFW_CTRL __iomem *zfw_ctrl;
3466         struct BOARD_CTRL __iomem *board_ctrl;
3467         struct CH_CTRL __iomem *ch_ctrl;
3468
3469         if (serial_paranoia_check(info, tty->name, __func__))
3470                 return -ENODEV;
3471
3472         lock_kernel();
3473
3474         card = info->card;
3475         channel = info->line - card->first_line;
3476         if (!cy_is_Z(card)) {
3477                 chip = channel >> 2;
3478                 channel &= 0x03;
3479                 index = card->bus_index;
3480                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3481
3482                 spin_lock_irqsave(&card->card_lock, flags);
3483                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3484                 status = readb(base_addr + (CyMSVR1 << index));
3485                 status |= readb(base_addr + (CyMSVR2 << index));
3486                 spin_unlock_irqrestore(&card->card_lock, flags);
3487
3488                 if (info->rtsdtr_inv) {
3489                         result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3490                                 ((status & CyDTR) ? TIOCM_RTS : 0);
3491                 } else {
3492                         result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3493                                 ((status & CyDTR) ? TIOCM_DTR : 0);
3494                 }
3495                 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3496                         ((status & CyRI) ? TIOCM_RNG : 0) |
3497                         ((status & CyDSR) ? TIOCM_DSR : 0) |
3498                         ((status & CyCTS) ? TIOCM_CTS : 0);
3499         } else {
3500                 base_addr = card->base_addr;
3501                 firm_id = card->base_addr + ID_ADDRESS;
3502                 if (cyz_is_loaded(card)) {
3503                         zfw_ctrl = card->base_addr +
3504                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3505                         board_ctrl = &zfw_ctrl->board_ctrl;
3506                         ch_ctrl = zfw_ctrl->ch_ctrl;
3507                         lstatus = readl(&ch_ctrl[channel].rs_status);
3508                         result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3509                                 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3510                                 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3511                                 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3512                                 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3513                                 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3514                 } else {
3515                         result = 0;
3516                         unlock_kernel();
3517                         return -ENODEV;
3518                 }
3519
3520         }
3521         unlock_kernel();
3522         return result;
3523 }                               /* cy_tiomget */
3524
3525 static int
3526 cy_tiocmset(struct tty_struct *tty, struct file *file,
3527                 unsigned int set, unsigned int clear)
3528 {
3529         struct cyclades_port *info = tty->driver_data;
3530         struct cyclades_card *card;
3531         int chip, channel, index;
3532         void __iomem *base_addr;
3533         unsigned long flags;
3534         struct FIRM_ID __iomem *firm_id;
3535         struct ZFW_CTRL __iomem *zfw_ctrl;
3536         struct BOARD_CTRL __iomem *board_ctrl;
3537         struct CH_CTRL __iomem *ch_ctrl;
3538         int retval;
3539
3540         if (serial_paranoia_check(info, tty->name, __func__))
3541                 return -ENODEV;
3542
3543         card = info->card;
3544         channel = (info->line) - (card->first_line);
3545         if (!cy_is_Z(card)) {
3546                 chip = channel >> 2;
3547                 channel &= 0x03;
3548                 index = card->bus_index;
3549                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3550
3551                 if (set & TIOCM_RTS) {
3552                         spin_lock_irqsave(&card->card_lock, flags);
3553                         cy_writeb(base_addr + (CyCAR << index),
3554                                   (u_char) channel);
3555                         if (info->rtsdtr_inv) {
3556                                 cy_writeb(base_addr + (CyMSVR2 << index),
3557                                           CyDTR);
3558                         } else {
3559                                 cy_writeb(base_addr + (CyMSVR1 << index),
3560                                           CyRTS);
3561                         }
3562                         spin_unlock_irqrestore(&card->card_lock, flags);
3563                 }
3564                 if (clear & TIOCM_RTS) {
3565                         spin_lock_irqsave(&card->card_lock, flags);
3566                         cy_writeb(base_addr + (CyCAR << index),
3567                                   (u_char) channel);
3568                         if (info->rtsdtr_inv) {
3569                                 cy_writeb(base_addr + (CyMSVR2 << index),
3570                                           ~CyDTR);
3571                         } else {
3572                                 cy_writeb(base_addr + (CyMSVR1 << index),
3573                                           ~CyRTS);
3574                         }
3575                         spin_unlock_irqrestore(&card->card_lock, flags);
3576                 }
3577                 if (set & TIOCM_DTR) {
3578                         spin_lock_irqsave(&card->card_lock, flags);
3579                         cy_writeb(base_addr + (CyCAR << index),
3580                                   (u_char) channel);
3581                         if (info->rtsdtr_inv) {
3582                                 cy_writeb(base_addr + (CyMSVR1 << index),
3583                                           CyRTS);
3584                         } else {
3585                                 cy_writeb(base_addr + (CyMSVR2 << index),
3586                                           CyDTR);
3587                         }
3588 #ifdef CY_DEBUG_DTR
3589                         printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3590                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3591                                 readb(base_addr + (CyMSVR1 << index)),
3592                                 readb(base_addr + (CyMSVR2 << index)));
3593 #endif
3594                         spin_unlock_irqrestore(&card->card_lock, flags);
3595                 }
3596                 if (clear & TIOCM_DTR) {
3597                         spin_lock_irqsave(&card->card_lock, flags);
3598                         cy_writeb(base_addr + (CyCAR << index),
3599                                   (u_char) channel);
3600                         if (info->rtsdtr_inv) {
3601                                 cy_writeb(base_addr + (CyMSVR1 << index),
3602                                           ~CyRTS);
3603                         } else {
3604                                 cy_writeb(base_addr + (CyMSVR2 << index),
3605                                           ~CyDTR);
3606                         }
3607
3608 #ifdef CY_DEBUG_DTR
3609                         printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3610                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3611                                 readb(base_addr + (CyMSVR1 << index)),
3612                                 readb(base_addr + (CyMSVR2 << index)));
3613 #endif
3614                         spin_unlock_irqrestore(&card->card_lock, flags);
3615                 }
3616         } else {
3617                 base_addr = card->base_addr;
3618
3619                 firm_id = card->base_addr + ID_ADDRESS;
3620                 if (cyz_is_loaded(card)) {
3621                         zfw_ctrl = card->base_addr +
3622                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3623                         board_ctrl = &zfw_ctrl->board_ctrl;
3624                         ch_ctrl = zfw_ctrl->ch_ctrl;
3625
3626                         if (set & TIOCM_RTS) {
3627                                 spin_lock_irqsave(&card->card_lock, flags);
3628                                 cy_writel(&ch_ctrl[channel].rs_control,
3629                                         readl(&ch_ctrl[channel].rs_control) |
3630                                         C_RS_RTS);
3631                                 spin_unlock_irqrestore(&card->card_lock, flags);
3632                         }
3633                         if (clear & TIOCM_RTS) {
3634                                 spin_lock_irqsave(&card->card_lock, flags);
3635                                 cy_writel(&ch_ctrl[channel].rs_control,
3636                                         readl(&ch_ctrl[channel].rs_control) &
3637                                         ~C_RS_RTS);
3638                                 spin_unlock_irqrestore(&card->card_lock, flags);
3639                         }
3640                         if (set & TIOCM_DTR) {
3641                                 spin_lock_irqsave(&card->card_lock, flags);
3642                                 cy_writel(&ch_ctrl[channel].rs_control,
3643                                         readl(&ch_ctrl[channel].rs_control) |
3644                                         C_RS_DTR);
3645 #ifdef CY_DEBUG_DTR
3646                                 printk(KERN_DEBUG "cyc:set_modem_info raising "
3647                                         "Z DTR\n");
3648 #endif
3649                                 spin_unlock_irqrestore(&card->card_lock, flags);
3650                         }
3651                         if (clear & TIOCM_DTR) {
3652                                 spin_lock_irqsave(&card->card_lock, flags);
3653                                 cy_writel(&ch_ctrl[channel].rs_control,
3654                                         readl(&ch_ctrl[channel].rs_control) &
3655                                         ~C_RS_DTR);
3656 #ifdef CY_DEBUG_DTR
3657                                 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3658                                         "Z DTR\n");
3659 #endif
3660                                 spin_unlock_irqrestore(&card->card_lock, flags);
3661                         }
3662                 } else {
3663                         return -ENODEV;
3664                 }
3665                 spin_lock_irqsave(&card->card_lock, flags);
3666                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3667                 if (retval != 0) {
3668                         printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3669                                 "was %x\n", info->line, retval);
3670                 }
3671                 spin_unlock_irqrestore(&card->card_lock, flags);
3672         }
3673         return 0;
3674 }                               /* cy_tiocmset */
3675
3676 /*
3677  * cy_break() --- routine which turns the break handling on or off
3678  */
3679 static int cy_break(struct tty_struct *tty, int break_state)
3680 {
3681         struct cyclades_port *info = tty->driver_data;
3682         struct cyclades_card *card;
3683         unsigned long flags;
3684         int retval = 0;
3685
3686         if (serial_paranoia_check(info, tty->name, "cy_break"))
3687                 return -EINVAL;
3688
3689         card = info->card;
3690
3691         spin_lock_irqsave(&card->card_lock, flags);
3692         if (!cy_is_Z(card)) {
3693                 /* Let the transmit ISR take care of this (since it
3694                    requires stuffing characters into the output stream).
3695                  */
3696                 if (break_state == -1) {
3697                         if (!info->breakon) {
3698                                 info->breakon = 1;
3699                                 if (!info->xmit_cnt) {
3700                                         spin_unlock_irqrestore(&card->card_lock, flags);
3701                                         start_xmit(info);
3702                                         spin_lock_irqsave(&card->card_lock, flags);
3703                                 }
3704                         }
3705                 } else {
3706                         if (!info->breakoff) {
3707                                 info->breakoff = 1;
3708                                 if (!info->xmit_cnt) {
3709                                         spin_unlock_irqrestore(&card->card_lock, flags);
3710                                         start_xmit(info);
3711                                         spin_lock_irqsave(&card->card_lock, flags);
3712                                 }
3713                         }
3714                 }
3715         } else {
3716                 if (break_state == -1) {
3717                         retval = cyz_issue_cmd(card,
3718                                 info->line - card->first_line,
3719                                 C_CM_SET_BREAK, 0L);
3720                         if (retval != 0) {
3721                                 printk(KERN_ERR "cyc:cy_break (set) retval on "
3722                                         "ttyC%d was %x\n", info->line, retval);
3723                         }
3724                 } else {
3725                         retval = cyz_issue_cmd(card,
3726                                 info->line - card->first_line,
3727                                 C_CM_CLR_BREAK, 0L);
3728                         if (retval != 0) {
3729                                 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3730                                         "on ttyC%d was %x\n", info->line,
3731                                         retval);
3732                         }
3733                 }
3734         }
3735         spin_unlock_irqrestore(&card->card_lock, flags);
3736         return retval;
3737 }                               /* cy_break */
3738
3739 static int get_mon_info(struct cyclades_port *info,
3740                                 struct cyclades_monitor __user *mon)
3741 {
3742
3743         if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3744                 return -EFAULT;
3745         info->mon.int_count = 0;
3746         info->mon.char_count = 0;
3747         info->mon.char_max = 0;
3748         info->mon.char_last = 0;
3749         return 0;
3750 }                               /* get_mon_info */
3751
3752 static int set_threshold(struct cyclades_port *info, unsigned long value)
3753 {
3754         struct cyclades_card *card;
3755         void __iomem *base_addr;
3756         int channel, chip, index;
3757         unsigned long flags;
3758
3759         card = info->card;
3760         channel = info->line - card->first_line;
3761         if (!cy_is_Z(card)) {
3762                 chip = channel >> 2;
3763                 channel &= 0x03;
3764                 index = card->bus_index;
3765                 base_addr =
3766                     card->base_addr + (cy_chip_offset[chip] << index);
3767
3768                 info->cor3 &= ~CyREC_FIFO;
3769                 info->cor3 |= value & CyREC_FIFO;
3770
3771                 spin_lock_irqsave(&card->card_lock, flags);
3772                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3773                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3774                 spin_unlock_irqrestore(&card->card_lock, flags);
3775         }
3776         return 0;
3777 }                               /* set_threshold */
3778
3779 static int get_threshold(struct cyclades_port *info,
3780                                                 unsigned long __user *value)
3781 {
3782         struct cyclades_card *card;
3783         void __iomem *base_addr;
3784         int channel, chip, index;
3785         unsigned long tmp;
3786
3787         card = info->card;
3788         channel = info->line - card->first_line;
3789         if (!cy_is_Z(card)) {
3790                 chip = channel >> 2;
3791                 channel &= 0x03;
3792                 index = card->bus_index;
3793                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3794
3795                 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3796                 return put_user(tmp, value);
3797         }
3798         return 0;
3799 }                               /* get_threshold */
3800
3801 static int set_default_threshold(struct cyclades_port *info,
3802                                                         unsigned long value)
3803 {
3804         info->default_threshold = value & 0x0f;
3805         return 0;
3806 }                               /* set_default_threshold */
3807
3808 static int get_default_threshold(struct cyclades_port *info,
3809                                                 unsigned long __user *value)
3810 {
3811         return put_user(info->default_threshold, value);
3812 }                               /* get_default_threshold */
3813
3814 static int set_timeout(struct cyclades_port *info, unsigned long value)
3815 {
3816         struct cyclades_card *card;
3817         void __iomem *base_addr;
3818         int channel, chip, index;
3819         unsigned long flags;
3820
3821         card = info->card;
3822         channel = info->line - card->first_line;
3823         if (!cy_is_Z(card)) {
3824                 chip = channel >> 2;
3825                 channel &= 0x03;
3826                 index = card->bus_index;
3827                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3828
3829                 spin_lock_irqsave(&card->card_lock, flags);
3830                 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3831                 spin_unlock_irqrestore(&card->card_lock, flags);
3832         }
3833         return 0;
3834 }                               /* set_timeout */
3835
3836 static int get_timeout(struct cyclades_port *info,
3837                                                 unsigned long __user *value)
3838 {
3839         struct cyclades_card *card;
3840         void __iomem *base_addr;
3841         int channel, chip, index;
3842         unsigned long tmp;
3843
3844         card = info->card;
3845         channel = info->line - card->first_line;
3846         if (!cy_is_Z(card)) {
3847                 chip = channel >> 2;
3848                 channel &= 0x03;
3849                 index = card->bus_index;
3850                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3851
3852                 tmp = readb(base_addr + (CyRTPR << index));
3853                 return put_user(tmp, value);
3854         }
3855         return 0;
3856 }                               /* get_timeout */
3857
3858 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3859 {
3860         info->default_timeout = value & 0xff;
3861         return 0;
3862 }                               /* set_default_timeout */
3863
3864 static int get_default_timeout(struct cyclades_port *info,
3865                                         unsigned long __user *value)
3866 {
3867         return put_user(info->default_timeout, value);
3868 }                               /* get_default_timeout */
3869
3870 /*
3871  * This routine allows the tty driver to implement device-
3872  * specific ioctl's.  If the ioctl number passed in cmd is
3873  * not recognized by the driver, it should return ENOIOCTLCMD.
3874  */
3875 static int
3876 cy_ioctl(struct tty_struct *tty, struct file *file,
3877          unsigned int cmd, unsigned long arg)
3878 {
3879         struct cyclades_port *info = tty->driver_data;
3880         struct cyclades_icount cprev, cnow;     /* kernel counter temps */
3881         struct serial_icounter_struct __user *p_cuser;  /* user space */
3882         int ret_val = 0;
3883         unsigned long flags;
3884         void __user *argp = (void __user *)arg;
3885
3886         if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3887                 return -ENODEV;
3888
3889 #ifdef CY_DEBUG_OTHER
3890         printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3891                 info->line, cmd, arg);
3892 #endif
3893         lock_kernel();
3894
3895         switch (cmd) {
3896         case CYGETMON:
3897                 ret_val = get_mon_info(info, argp);
3898                 break;
3899         case CYGETTHRESH:
3900                 ret_val = get_threshold(info, argp);
3901                 break;
3902         case CYSETTHRESH:
3903                 ret_val = set_threshold(info, arg);
3904                 break;
3905         case CYGETDEFTHRESH:
3906                 ret_val = get_default_threshold(info, argp);
3907                 break;
3908         case CYSETDEFTHRESH:
3909                 ret_val = set_default_threshold(info, arg);
3910                 break;
3911         case CYGETTIMEOUT:
3912                 ret_val = get_timeout(info, argp);
3913                 break;
3914         case CYSETTIMEOUT:
3915                 ret_val = set_timeout(info, arg);
3916                 break;
3917         case CYGETDEFTIMEOUT:
3918                 ret_val = get_default_timeout(info, argp);
3919                 break;
3920         case CYSETDEFTIMEOUT:
3921                 ret_val = set_default_timeout(info, arg);
3922                 break;
3923         case CYSETRFLOW:
3924                 info->rflow = (int)arg;
3925                 ret_val = 0;
3926                 break;
3927         case CYGETRFLOW:
3928                 ret_val = info->rflow;
3929                 break;
3930         case CYSETRTSDTR_INV:
3931                 info->rtsdtr_inv = (int)arg;
3932                 ret_val = 0;
3933                 break;
3934         case CYGETRTSDTR_INV:
3935                 ret_val = info->rtsdtr_inv;
3936                 break;
3937         case CYGETCD1400VER:
3938                 ret_val = info->chip_rev;
3939                 break;
3940 #ifndef CONFIG_CYZ_INTR
3941         case CYZSETPOLLCYCLE:
3942                 cyz_polling_cycle = (arg * HZ) / 1000;
3943                 ret_val = 0;
3944                 break;
3945         case CYZGETPOLLCYCLE:
3946                 ret_val = (cyz_polling_cycle * 1000) / HZ;
3947                 break;
3948 #endif                          /* CONFIG_CYZ_INTR */
3949         case CYSETWAIT:
3950                 info->port.closing_wait = (unsigned short)arg * HZ / 100;
3951                 ret_val = 0;
3952                 break;
3953         case CYGETWAIT:
3954                 ret_val = info->port.closing_wait / (HZ / 100);
3955                 break;
3956         case TIOCGSERIAL:
3957                 ret_val = get_serial_info(info, argp);
3958                 break;
3959         case TIOCSSERIAL:
3960                 ret_val = cy_set_serial_info(info, tty, argp);
3961                 break;
3962         case TIOCSERGETLSR:     /* Get line status register */
3963                 ret_val = get_lsr_info(info, argp);
3964                 break;
3965                 /*
3966                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
3967                  * - mask passed in arg for lines of interest
3968                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
3969                  * Caller should use TIOCGICOUNT to see which one it was
3970                  */
3971         case TIOCMIWAIT:
3972                 spin_lock_irqsave(&info->card->card_lock, flags);
3973                 /* note the counters on entry */
3974                 cnow = info->icount;
3975                 spin_unlock_irqrestore(&info->card->card_lock, flags);
3976                 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
3977                         cprev = cnow;
3978                         spin_lock_irqsave(&info->card->card_lock, flags);
3979                         cnow = info->icount;    /* atomic copy */
3980                         spin_unlock_irqrestore(&info->card->card_lock, flags);
3981
3982                         ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
3983                         ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
3984                         ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
3985                         ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
3986                 }));
3987                 break;
3988
3989                 /*
3990                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
3991                  * Return: write counters to the user passed counter struct
3992                  * NB: both 1->0 and 0->1 transitions are counted except for
3993                  *     RI where only 0->1 is counted.
3994                  */
3995         case TIOCGICOUNT:
3996                 spin_lock_irqsave(&info->card->card_lock, flags);
3997                 cnow = info->icount;
3998                 spin_unlock_irqrestore(&info->card->card_lock, flags);
3999                 p_cuser = argp;
4000                 ret_val = put_user(cnow.cts, &p_cuser->cts);
4001                 if (ret_val)
4002                         break;
4003                 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4004                 if (ret_val)
4005                         break;
4006                 ret_val = put_user(cnow.rng, &p_cuser->rng);
4007                 if (ret_val)
4008                         break;
4009                 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4010                 if (ret_val)
4011                         break;
4012                 ret_val = put_user(cnow.rx, &p_cuser->rx);
4013                 if (ret_val)
4014                         break;
4015                 ret_val = put_user(cnow.tx, &p_cuser->tx);
4016                 if (ret_val)
4017                         break;
4018                 ret_val = put_user(cnow.frame, &p_cuser->frame);
4019                 if (ret_val)
4020                         break;
4021                 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4022                 if (ret_val)
4023                         break;
4024                 ret_val = put_user(cnow.parity, &p_cuser->parity);
4025                 if (ret_val)
4026                         break;
4027                 ret_val = put_user(cnow.brk, &p_cuser->brk);
4028                 if (ret_val)
4029                         break;
4030                 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4031                 if (ret_val)
4032                         break;
4033                 ret_val = 0;
4034                 break;
4035         default:
4036                 ret_val = -ENOIOCTLCMD;
4037         }
4038         unlock_kernel();
4039
4040 #ifdef CY_DEBUG_OTHER
4041         printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4042 #endif
4043         return ret_val;
4044 }                               /* cy_ioctl */
4045
4046 /*
4047  * This routine allows the tty driver to be notified when
4048  * device's termios settings have changed.  Note that a
4049  * well-designed tty driver should be prepared to accept the case
4050  * where old == NULL, and try to do something rational.
4051  */
4052 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4053 {
4054         struct cyclades_port *info = tty->driver_data;
4055
4056 #ifdef CY_DEBUG_OTHER
4057         printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4058 #endif
4059
4060         cy_set_line_char(info, tty);
4061
4062         if ((old_termios->c_cflag & CRTSCTS) &&
4063                         !(tty->termios->c_cflag & CRTSCTS)) {
4064                 tty->hw_stopped = 0;
4065                 cy_start(tty);
4066         }
4067 #if 0
4068         /*
4069          * No need to wake up processes in open wait, since they
4070          * sample the CLOCAL flag once, and don't recheck it.
4071          * XXX  It's not clear whether the current behavior is correct
4072          * or not.  Hence, this may change.....
4073          */
4074         if (!(old_termios->c_cflag & CLOCAL) &&
4075             (tty->termios->c_cflag & CLOCAL))
4076                 wake_up_interruptible(&info->port.open_wait);
4077 #endif
4078 }                               /* cy_set_termios */
4079
4080 /* This function is used to send a high-priority XON/XOFF character to
4081    the device.
4082 */
4083 static void cy_send_xchar(struct tty_struct *tty, char ch)
4084 {
4085         struct cyclades_port *info = tty->driver_data;
4086         struct cyclades_card *card;
4087         int channel;
4088
4089         if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4090                 return;
4091
4092         info->x_char = ch;
4093
4094         if (ch)
4095                 cy_start(tty);
4096
4097         card = info->card;
4098         channel = info->line - card->first_line;
4099
4100         if (cy_is_Z(card)) {
4101                 if (ch == STOP_CHAR(tty))
4102                         cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4103                 else if (ch == START_CHAR(tty))
4104                         cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4105         }
4106 }
4107
4108 /* This routine is called by the upper-layer tty layer to signal
4109    that incoming characters should be throttled because the input
4110    buffers are close to full.
4111  */
4112 static void cy_throttle(struct tty_struct *tty)
4113 {
4114         struct cyclades_port *info = tty->driver_data;
4115         struct cyclades_card *card;
4116         unsigned long flags;
4117         void __iomem *base_addr;
4118         int chip, channel, index;
4119
4120 #ifdef CY_DEBUG_THROTTLE
4121         char buf[64];
4122
4123         printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4124                         tty->ldisc.chars_in_buffer(tty), info->line);
4125 #endif
4126
4127         if (serial_paranoia_check(info, tty->name, "cy_throttle"))
4128                 return;
4129
4130         card = info->card;
4131
4132         if (I_IXOFF(tty)) {
4133                 if (!cy_is_Z(card))
4134                         cy_send_xchar(tty, STOP_CHAR(tty));
4135                 else
4136                         info->throttle = 1;
4137         }
4138
4139         if (tty->termios->c_cflag & CRTSCTS) {
4140                 channel = info->line - card->first_line;
4141                 if (!cy_is_Z(card)) {
4142                         chip = channel >> 2;
4143                         channel &= 0x03;
4144                         index = card->bus_index;
4145                         base_addr = card->base_addr +
4146                                 (cy_chip_offset[chip] << index);
4147
4148                         spin_lock_irqsave(&card->card_lock, flags);
4149                         cy_writeb(base_addr + (CyCAR << index),
4150                                   (u_char) channel);
4151                         if (info->rtsdtr_inv) {
4152                                 cy_writeb(base_addr + (CyMSVR2 << index),
4153                                           ~CyDTR);
4154                         } else {
4155                                 cy_writeb(base_addr + (CyMSVR1 << index),
4156                                           ~CyRTS);
4157                         }
4158                         spin_unlock_irqrestore(&card->card_lock, flags);
4159                 } else {
4160                         info->throttle = 1;
4161                 }
4162         }
4163 }                               /* cy_throttle */
4164
4165 /*
4166  * This routine notifies the tty driver that it should signal
4167  * that characters can now be sent to the tty without fear of
4168  * overrunning the input buffers of the line disciplines.
4169  */
4170 static void cy_unthrottle(struct tty_struct *tty)
4171 {
4172         struct cyclades_port *info = tty->driver_data;
4173         struct cyclades_card *card;
4174         unsigned long flags;
4175         void __iomem *base_addr;
4176         int chip, channel, index;
4177
4178 #ifdef CY_DEBUG_THROTTLE
4179         char buf[64];
4180
4181         printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4182                 tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
4183 #endif
4184
4185         if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
4186                 return;
4187
4188         if (I_IXOFF(tty)) {
4189                 if (info->x_char)
4190                         info->x_char = 0;
4191                 else
4192                         cy_send_xchar(tty, START_CHAR(tty));
4193         }
4194
4195         if (tty->termios->c_cflag & CRTSCTS) {
4196                 card = info->card;
4197                 channel = info->line - card->first_line;
4198                 if (!cy_is_Z(card)) {
4199                         chip = channel >> 2;
4200                         channel &= 0x03;
4201                         index = card->bus_index;
4202                         base_addr = card->base_addr +
4203                                 (cy_chip_offset[chip] << index);
4204
4205                         spin_lock_irqsave(&card->card_lock, flags);
4206                         cy_writeb(base_addr + (CyCAR << index),
4207                                   (u_char) channel);
4208                         if (info->rtsdtr_inv) {
4209                                 cy_writeb(base_addr + (CyMSVR2 << index),
4210                                           CyDTR);
4211                         } else {
4212                                 cy_writeb(base_addr + (CyMSVR1 << index),
4213                                           CyRTS);
4214                         }
4215                         spin_unlock_irqrestore(&card->card_lock, flags);
4216                 } else {
4217                         info->throttle = 0;
4218                 }
4219         }
4220 }                               /* cy_unthrottle */
4221
4222 /* cy_start and cy_stop provide software output flow control as a
4223    function of XON/XOFF, software CTS, and other such stuff.
4224 */
4225 static void cy_stop(struct tty_struct *tty)
4226 {
4227         struct cyclades_card *cinfo;
4228         struct cyclades_port *info = tty->driver_data;
4229         void __iomem *base_addr;
4230         int chip, channel, index;
4231         unsigned long flags;
4232
4233 #ifdef CY_DEBUG_OTHER
4234         printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4235 #endif
4236
4237         if (serial_paranoia_check(info, tty->name, "cy_stop"))
4238                 return;
4239
4240         cinfo = info->card;
4241         channel = info->line - cinfo->first_line;
4242         if (!cy_is_Z(cinfo)) {
4243                 index = cinfo->bus_index;
4244                 chip = channel >> 2;
4245                 channel &= 0x03;
4246                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4247
4248                 spin_lock_irqsave(&cinfo->card_lock, flags);
4249                 cy_writeb(base_addr + (CyCAR << index),
4250                         (u_char)(channel & 0x0003)); /* index channel */
4251                 cy_writeb(base_addr + (CySRER << index),
4252                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4253                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4254         }
4255 }                               /* cy_stop */
4256
4257 static void cy_start(struct tty_struct *tty)
4258 {
4259         struct cyclades_card *cinfo;
4260         struct cyclades_port *info = tty->driver_data;
4261         void __iomem *base_addr;
4262         int chip, channel, index;
4263         unsigned long flags;
4264
4265 #ifdef CY_DEBUG_OTHER
4266         printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4267 #endif
4268
4269         if (serial_paranoia_check(info, tty->name, "cy_start"))
4270                 return;
4271
4272         cinfo = info->card;
4273         channel = info->line - cinfo->first_line;
4274         index = cinfo->bus_index;
4275         if (!cy_is_Z(cinfo)) {
4276                 chip = channel >> 2;
4277                 channel &= 0x03;
4278                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4279
4280                 spin_lock_irqsave(&cinfo->card_lock, flags);
4281                 cy_writeb(base_addr + (CyCAR << index),
4282                         (u_char) (channel & 0x0003));   /* index channel */
4283                 cy_writeb(base_addr + (CySRER << index),
4284                           readb(base_addr + (CySRER << index)) | CyTxRdy);
4285                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4286         }
4287 }                               /* cy_start */
4288
4289 /*
4290  * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4291  */
4292 static void cy_hangup(struct tty_struct *tty)
4293 {
4294         struct cyclades_port *info = tty->driver_data;
4295
4296 #ifdef CY_DEBUG_OTHER
4297         printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4298 #endif
4299
4300         if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4301                 return;
4302
4303         cy_flush_buffer(tty);
4304         cy_shutdown(info, tty);
4305         info->port.count = 0;
4306 #ifdef CY_DEBUG_COUNT
4307         printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4308                 current->pid);
4309 #endif
4310         tty_port_tty_set(&info->port, NULL);
4311         info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
4312         wake_up_interruptible(&info->port.open_wait);
4313 }                               /* cy_hangup */
4314
4315 /*
4316  * ---------------------------------------------------------------------
4317  * cy_init() and friends
4318  *
4319  * cy_init() is called at boot-time to initialize the serial driver.
4320  * ---------------------------------------------------------------------
4321  */
4322
4323 static int __devinit cy_init_card(struct cyclades_card *cinfo)
4324 {
4325         struct cyclades_port *info;
4326         unsigned int port;
4327         unsigned short chip_number;
4328
4329         spin_lock_init(&cinfo->card_lock);
4330         cinfo->intr_enabled = 0;
4331
4332         cinfo->ports = kcalloc(cinfo->nports, sizeof(*cinfo->ports),
4333                         GFP_KERNEL);
4334         if (cinfo->ports == NULL) {
4335                 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
4336                 return -ENOMEM;
4337         }
4338
4339         for (port = cinfo->first_line; port < cinfo->first_line + cinfo->nports;
4340                         port++) {
4341                 info = &cinfo->ports[port - cinfo->first_line];
4342                 tty_port_init(&info->port);
4343                 info->magic = CYCLADES_MAGIC;
4344                 info->card = cinfo;
4345                 info->line = port;
4346
4347                 info->port.closing_wait = CLOSING_WAIT_DELAY;
4348                 info->port.close_delay = 5 * HZ / 10;
4349                 info->port.flags = STD_COM_FLAGS;
4350                 init_completion(&info->shutdown_wait);
4351                 init_waitqueue_head(&info->delta_msr_wait);
4352
4353                 if (cy_is_Z(cinfo)) {
4354                         info->type = PORT_STARTECH;
4355                         if (cinfo->hw_ver == ZO_V1)
4356                                 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4357                         else
4358                                 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4359 #ifdef CONFIG_CYZ_INTR
4360                         setup_timer(&cyz_rx_full_timer[port],
4361                                 cyz_rx_restart, (unsigned long)info);
4362 #endif
4363                 } else {
4364                         int index = cinfo->bus_index;
4365                         info->type = PORT_CIRRUS;
4366                         info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4367                         info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4368                         info->cor2 = CyETC;
4369                         info->cor3 = 0x08;      /* _very_ small rcv threshold */
4370
4371                         chip_number = (port - cinfo->first_line) / 4;
4372                         info->chip_rev = readb(cinfo->base_addr +
4373                                       (cy_chip_offset[chip_number] << index) +
4374                                       (CyGFRCR << index));
4375
4376                         if (info->chip_rev >= CD1400_REV_J) {
4377                                 /* It is a CD1400 rev. J or later */
4378                                 info->tbpr = baud_bpr_60[13];   /* Tx BPR */
4379                                 info->tco = baud_co_60[13];     /* Tx CO */
4380                                 info->rbpr = baud_bpr_60[13];   /* Rx BPR */
4381                                 info->rco = baud_co_60[13];     /* Rx CO */
4382                                 info->rtsdtr_inv = 1;
4383                         } else {
4384                                 info->tbpr = baud_bpr_25[13];   /* Tx BPR */
4385                                 info->tco = baud_co_25[13];     /* Tx CO */
4386                                 info->rbpr = baud_bpr_25[13];   /* Rx BPR */
4387                                 info->rco = baud_co_25[13];     /* Rx CO */
4388                                 info->rtsdtr_inv = 0;
4389                         }
4390                         info->read_status_mask = CyTIMEOUT | CySPECHAR |
4391                                 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4392                 }
4393
4394         }
4395
4396 #ifndef CONFIG_CYZ_INTR
4397         if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) {
4398                 mod_timer(&cyz_timerlist, jiffies + 1);
4399 #ifdef CY_PCI_DEBUG
4400                 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4401 #endif
4402         }
4403 #endif
4404         return 0;
4405 }
4406
4407 /* initialize chips on Cyclom-Y card -- return number of valid
4408    chips (which is number of ports/4) */
4409 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4410                 int index)
4411 {
4412         unsigned int chip_number;
4413         void __iomem *base_addr;
4414
4415         cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4416         /* Cy_HwReset is 0x1400 */
4417         cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4418         /* Cy_ClrIntr is 0x1800 */
4419         udelay(500L);
4420
4421         for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
4422                                                         chip_number++) {
4423                 base_addr =
4424                     true_base_addr + (cy_chip_offset[chip_number] << index);
4425                 mdelay(1);
4426                 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4427                         /*************
4428                         printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4429                         chip_number, (unsigned long)base_addr);
4430                         *************/
4431                         return chip_number;
4432                 }
4433
4434                 cy_writeb(base_addr + (CyGFRCR << index), 0);
4435                 udelay(10L);
4436
4437                 /* The Cyclom-16Y does not decode address bit 9 and therefore
4438                    cannot distinguish between references to chip 0 and a non-
4439                    existent chip 4.  If the preceding clearing of the supposed
4440                    chip 4 GFRCR register appears at chip 0, there is no chip 4
4441                    and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4442                  */
4443                 if (chip_number == 4 && readb(true_base_addr +
4444                                 (cy_chip_offset[0] << index) +
4445                                 (CyGFRCR << index)) == 0) {
4446                         return chip_number;
4447                 }
4448
4449                 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4450                 mdelay(1);
4451
4452                 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4453                         /*
4454                            printk(" chip #%d at %#6lx is not responding ",
4455                            chip_number, (unsigned long)base_addr);
4456                            printk("(GFRCR stayed 0)\n",
4457                          */
4458                         return chip_number;
4459                 }
4460                 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4461                                 0x40) {
4462                         /*
4463                         printk(" chip #%d at %#6lx is not valid (GFRCR == "
4464                                         "%#2x)\n",
4465                                         chip_number, (unsigned long)base_addr,
4466                                         base_addr[CyGFRCR<<index]);
4467                          */
4468                         return chip_number;
4469                 }
4470                 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4471                 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4472                         /* It is a CD1400 rev. J or later */
4473                         /* Impossible to reach 5ms with this chip.
4474                            Changed to 2ms instead (f = 500 Hz). */
4475                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4476                 } else {
4477                         /* f = 200 Hz */
4478                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4479                 }
4480
4481                 /*
4482                    printk(" chip #%d at %#6lx is rev 0x%2x\n",
4483                    chip_number, (unsigned long)base_addr,
4484                    readb(base_addr+(CyGFRCR<<index)));
4485                  */
4486         }
4487         return chip_number;
4488 }                               /* cyy_init_card */
4489
4490 /*
4491  * ---------------------------------------------------------------------
4492  * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4493  * sets global variables and return the number of ISA boards found.
4494  * ---------------------------------------------------------------------
4495  */
4496 static int __init cy_detect_isa(void)
4497 {
4498 #ifdef CONFIG_ISA
4499         unsigned short cy_isa_irq, nboard;
4500         void __iomem *cy_isa_address;
4501         unsigned short i, j, cy_isa_nchan;
4502 #ifdef MODULE
4503         int isparam = 0;
4504 #endif
4505
4506         nboard = 0;
4507
4508 #ifdef MODULE
4509         /* Check for module parameters */
4510         for (i = 0; i < NR_CARDS; i++) {
4511                 if (maddr[i] || i) {
4512                         isparam = 1;
4513                         cy_isa_addresses[i] = maddr[i];
4514                 }
4515                 if (!maddr[i])
4516                         break;
4517         }
4518 #endif
4519
4520         /* scan the address table probing for Cyclom-Y/ISA boards */
4521         for (i = 0; i < NR_ISA_ADDRS; i++) {
4522                 unsigned int isa_address = cy_isa_addresses[i];
4523                 if (isa_address == 0x0000)
4524                         return nboard;
4525
4526                 /* probe for CD1400... */
4527                 cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
4528                 if (cy_isa_address == NULL) {
4529                         printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4530                                         "address\n");
4531                         continue;
4532                 }
4533                 cy_isa_nchan = CyPORTS_PER_CHIP *
4534                         cyy_init_card(cy_isa_address, 0);
4535                 if (cy_isa_nchan == 0) {
4536                         iounmap(cy_isa_address);
4537                         continue;
4538                 }
4539 #ifdef MODULE
4540                 if (isparam && irq[i])
4541                         cy_isa_irq = irq[i];
4542                 else
4543 #endif
4544                         /* find out the board's irq by probing */
4545                         cy_isa_irq = detect_isa_irq(cy_isa_address);
4546                 if (cy_isa_irq == 0) {
4547                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4548                                 "IRQ could not be detected.\n",
4549                                 (unsigned long)cy_isa_address);
4550                         iounmap(cy_isa_address);
4551                         continue;
4552                 }
4553
4554                 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4555                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4556                                 "more channels are available. Change NR_PORTS "
4557                                 "in cyclades.c and recompile kernel.\n",
4558                                 (unsigned long)cy_isa_address);
4559                         iounmap(cy_isa_address);
4560                         return nboard;
4561                 }
4562                 /* fill the next cy_card structure available */
4563                 for (j = 0; j < NR_CARDS; j++) {
4564                         if (cy_card[j].base_addr == NULL)
4565                                 break;
4566                 }
4567                 if (j == NR_CARDS) {    /* no more cy_cards available */
4568                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4569                                 "more cards can be used. Change NR_CARDS in "
4570                                 "cyclades.c and recompile kernel.\n",
4571                                 (unsigned long)cy_isa_address);
4572                         iounmap(cy_isa_address);
4573                         return nboard;
4574                 }
4575
4576                 /* allocate IRQ */
4577                 if (request_irq(cy_isa_irq, cyy_interrupt,
4578                                 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4579                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4580                                 "could not allocate IRQ#%d.\n",
4581                                 (unsigned long)cy_isa_address, cy_isa_irq);
4582                         iounmap(cy_isa_address);
4583                         return nboard;
4584                 }
4585
4586                 /* set cy_card */
4587                 cy_card[j].base_addr = cy_isa_address;
4588                 cy_card[j].ctl_addr.p9050 = NULL;
4589                 cy_card[j].irq = (int)cy_isa_irq;
4590                 cy_card[j].bus_index = 0;
4591                 cy_card[j].first_line = cy_next_channel;
4592                 cy_card[j].num_chips = cy_isa_nchan / CyPORTS_PER_CHIP;
4593                 cy_card[j].nports = cy_isa_nchan;
4594                 if (cy_init_card(&cy_card[j])) {
4595                         cy_card[j].base_addr = NULL;
4596                         free_irq(cy_isa_irq, &cy_card[j]);
4597                         iounmap(cy_isa_address);
4598                         continue;
4599                 }
4600                 nboard++;
4601
4602                 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4603                         "%d channels starting from port %d\n",
4604                         j + 1, (unsigned long)cy_isa_address,
4605                         (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4606                         cy_isa_irq, cy_isa_nchan, cy_next_channel);
4607
4608                 for (j = cy_next_channel;
4609                                 j < cy_next_channel + cy_isa_nchan; j++)
4610                         tty_register_device(cy_serial_driver, j, NULL);
4611                 cy_next_channel += cy_isa_nchan;
4612         }
4613         return nboard;
4614 #else
4615         return 0;
4616 #endif                          /* CONFIG_ISA */
4617 }                               /* cy_detect_isa */
4618
4619 #ifdef CONFIG_PCI
4620 static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4621 {
4622         unsigned int a;
4623
4624         for (a = 0; a < size && *str; a++, str++)
4625                 if (*str & 0x80)
4626                         return -EINVAL;
4627
4628         for (; a < size; a++, str++)
4629                 if (*str)
4630                         return -EINVAL;
4631
4632         return 0;
4633 }
4634
4635 static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
4636                 unsigned int size)
4637 {
4638         for (; size > 0; size--) {
4639                 cy_writel(fpga, *data++);
4640                 udelay(10);
4641         }
4642 }
4643
4644 static void __devinit plx_init(struct pci_dev *pdev, int irq,
4645                 struct RUNTIME_9060 __iomem *addr)
4646 {
4647         /* Reset PLX */
4648         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
4649         udelay(100L);
4650         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
4651
4652         /* Reload Config. Registers from EEPROM */
4653         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
4654         udelay(100L);
4655         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4656
4657         /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4658          * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4659          * registers. This will remain here until we find a permanent fix.
4660          */
4661         pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4662 }
4663
4664 static int __devinit __cyz_load_fw(const struct firmware *fw,
4665                 const char *name, const u32 mailbox, void __iomem *base,
4666                 void __iomem *fpga)
4667 {
4668         const void *ptr = fw->data;
4669         const struct zfile_header *h = ptr;
4670         const struct zfile_config *c, *cs;
4671         const struct zfile_block *b, *bs;
4672         unsigned int a, tmp, len = fw->size;
4673 #define BAD_FW KERN_ERR "Bad firmware: "
4674         if (len < sizeof(*h)) {
4675                 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4676                 return -EINVAL;
4677         }
4678
4679         cs = ptr + h->config_offset;
4680         bs = ptr + h->block_offset;
4681
4682         if ((void *)(cs + h->n_config) > ptr + len ||
4683                         (void *)(bs + h->n_blocks) > ptr + len) {
4684                 printk(BAD_FW "too short");
4685                 return  -EINVAL;
4686         }
4687
4688         if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4689                         cyc_isfwstr(h->date, sizeof(h->date))) {
4690                 printk(BAD_FW "bad formatted header string\n");
4691                 return -EINVAL;
4692         }
4693
4694         if (strncmp(name, h->name, sizeof(h->name))) {
4695                 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4696                 return -EINVAL;
4697         }
4698
4699         tmp = 0;
4700         for (c = cs; c < cs + h->n_config; c++) {
4701                 for (a = 0; a < c->n_blocks; a++)
4702                         if (c->block_list[a] > h->n_blocks) {
4703                                 printk(BAD_FW "bad block ref number in cfgs\n");
4704                                 return -EINVAL;
4705                         }
4706                 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4707                         tmp++;
4708         }
4709         if (!tmp) {
4710                 printk(BAD_FW "nothing appropriate\n");
4711                 return -EINVAL;
4712         }
4713
4714         for (b = bs; b < bs + h->n_blocks; b++)
4715                 if (b->file_offset + b->size > len) {
4716                         printk(BAD_FW "bad block data offset\n");
4717                         return -EINVAL;
4718                 }
4719
4720         /* everything is OK, let's seek'n'load it */
4721         for (c = cs; c < cs + h->n_config; c++)
4722                 if (c->mailbox == mailbox && c->function == 0)
4723                         break;
4724
4725         for (a = 0; a < c->n_blocks; a++) {
4726                 b = &bs[c->block_list[a]];
4727                 if (b->type == ZBLOCK_FPGA) {
4728                         if (fpga != NULL)
4729                                 cyz_fpga_copy(fpga, ptr + b->file_offset,
4730                                                 b->size);
4731                 } else {
4732                         if (base != NULL)
4733                                 memcpy_toio(base + b->ram_offset,
4734                                                ptr + b->file_offset, b->size);
4735                 }
4736         }
4737 #undef BAD_FW
4738         return 0;
4739 }
4740
4741 static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4742                 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4743 {
4744         const struct firmware *fw;
4745         struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4746         struct CUSTOM_REG __iomem *cust = base_addr;
4747         struct ZFW_CTRL __iomem *pt_zfwctrl;
4748         void __iomem *tmp;
4749         u32 mailbox, status, nchan;
4750         unsigned int i;
4751         int retval;
4752
4753         retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4754         if (retval) {
4755                 dev_err(&pdev->dev, "can't get firmware\n");
4756                 goto err;
4757         }
4758
4759         /* Check whether the firmware is already loaded and running. If
4760            positive, skip this board */
4761         if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4762                 u32 cntval = readl(base_addr + 0x190);
4763
4764                 udelay(100);
4765                 if (cntval != readl(base_addr + 0x190)) {
4766                         /* FW counter is working, FW is running */
4767                         dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4768                                         "Skipping board.\n");
4769                         retval = 0;
4770                         goto err_rel;
4771                 }
4772         }
4773
4774         /* start boot */
4775         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4776                         ~0x00030800UL);
4777
4778         mailbox = readl(&ctl_addr->mail_box_0);
4779
4780         if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) {
4781                 /* stops CPU and set window to beginning of RAM */
4782                 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4783                 cy_writel(&cust->cpu_stop, 0);
4784                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4785                 udelay(100);
4786         }
4787
4788         plx_init(pdev, irq, ctl_addr);
4789
4790         if (mailbox != 0) {
4791                 /* load FPGA */
4792                 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4793                                 base_addr);
4794                 if (retval)
4795                         goto err_rel;
4796                 if (!__cyz_fpga_loaded(ctl_addr)) {
4797                         dev_err(&pdev->dev, "fw upload successful, but fw is "
4798                                         "not loaded\n");
4799                         goto err_rel;
4800                 }
4801         }
4802
4803         /* stops CPU and set window to beginning of RAM */
4804         cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4805         cy_writel(&cust->cpu_stop, 0);
4806         cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4807         udelay(100);
4808
4809         /* clear memory */
4810         for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4811                 cy_writeb(tmp, 255);
4812         if (mailbox != 0) {
4813                 /* set window to last 512K of RAM */
4814                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
4815                 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4816                         cy_writeb(tmp, 255);
4817                 /* set window to beginning of RAM */
4818                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4819         }
4820
4821         retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4822         release_firmware(fw);
4823         if (retval)
4824                 goto err;
4825
4826         /* finish boot and start boards */
4827         cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4828         cy_writel(&cust->cpu_start, 0);
4829         cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4830         i = 0;
4831         while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4832                 msleep(100);
4833         if (status != ZFIRM_ID) {
4834                 if (status == ZFIRM_HLT) {
4835                         dev_err(&pdev->dev, "you need an external power supply "
4836                                 "for this number of ports. Firmware halted and "
4837                                 "board reset.\n");
4838                         retval = -EIO;
4839                         goto err;
4840                 }
4841                 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4842                                 "some more time\n", status);
4843                 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
4844                                 i++ < 200)
4845                         msleep(100);
4846                 if (status != ZFIRM_ID) {
4847                         dev_err(&pdev->dev, "Board not started in 20 seconds! "
4848                                         "Giving up. (fid->signature = 0x%x)\n",
4849                                         status);
4850                         dev_info(&pdev->dev, "*** Warning ***: if you are "
4851                                 "upgrading the FW, please power cycle the "
4852                                 "system before loading the new FW to the "
4853                                 "Cyclades-Z.\n");
4854
4855                         if (__cyz_fpga_loaded(ctl_addr))
4856                                 plx_init(pdev, irq, ctl_addr);
4857
4858                         retval = -EIO;
4859                         goto err;
4860                 }
4861                 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
4862                                 i / 10);
4863         }
4864         pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
4865
4866         dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
4867                         base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
4868                         base_addr + readl(&fid->zfwctrl_addr));
4869
4870         nchan = readl(&pt_zfwctrl->board_ctrl.n_channel);
4871         dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
4872                 readl(&pt_zfwctrl->board_ctrl.fw_version), nchan);
4873
4874         if (nchan == 0) {
4875                 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
4876                         "check the connection between the Z host card and the "
4877                         "serial expanders.\n");
4878
4879                 if (__cyz_fpga_loaded(ctl_addr))
4880                         plx_init(pdev, irq, ctl_addr);
4881
4882                 dev_info(&pdev->dev, "Null number of ports detected. Board "
4883                                 "reset.\n");
4884                 retval = 0;
4885                 goto err;
4886         }
4887
4888         cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
4889         cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
4890
4891         /*
4892            Early firmware failed to start looking for commands.
4893            This enables firmware interrupts for those commands.
4894          */
4895         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4896                         (1 << 17));
4897         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4898                         0x00030800UL);
4899
4900         return nchan;
4901 err_rel:
4902         release_firmware(fw);
4903 err:
4904         return retval;
4905 }
4906
4907 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4908                 const struct pci_device_id *ent)
4909 {
4910         void __iomem *addr0 = NULL, *addr2 = NULL;
4911         char *card_name = NULL;
4912         u32 uninitialized_var(mailbox);
4913         unsigned int device_id, nchan = 0, card_no, i;
4914         unsigned char plx_ver;
4915         int retval, irq;
4916
4917         retval = pci_enable_device(pdev);
4918         if (retval) {
4919                 dev_err(&pdev->dev, "cannot enable device\n");
4920                 goto err;
4921         }
4922
4923         /* read PCI configuration area */
4924         irq = pdev->irq;
4925         device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4926
4927 #if defined(__alpha__)
4928         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) {   /* below 1M? */
4929                 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
4930                         "addresses on Alpha systems.\n");
4931                 retval = -EIO;
4932                 goto err_dis;
4933         }
4934 #endif
4935         if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4936                 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4937                         "addresses\n");
4938                 retval = -EIO;
4939                 goto err_dis;
4940         }
4941
4942         if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4943                 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4944                                 "it...\n");
4945                 pdev->resource[2].flags &= ~IORESOURCE_IO;
4946         }
4947
4948         retval = pci_request_regions(pdev, "cyclades");
4949         if (retval) {
4950                 dev_err(&pdev->dev, "failed to reserve resources\n");
4951                 goto err_dis;
4952         }
4953
4954         retval = -EIO;
4955         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4956                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4957                 card_name = "Cyclom-Y";
4958
4959                 addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
4960                                 CyPCI_Yctl);
4961                 if (addr0 == NULL) {
4962                         dev_err(&pdev->dev, "can't remap ctl region\n");
4963                         goto err_reg;
4964                 }
4965                 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
4966                                 CyPCI_Ywin);
4967                 if (addr2 == NULL) {
4968                         dev_err(&pdev->dev, "can't remap base region\n");
4969                         goto err_unmap;
4970                 }
4971
4972                 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
4973                 if (nchan == 0) {
4974                         dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
4975                                         "Serial-Modules\n");
4976                         goto err_unmap;
4977                 }
4978         } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
4979                 struct RUNTIME_9060 __iomem *ctl_addr;
4980
4981                 ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
4982                                 CyPCI_Zctl);
4983                 if (addr0 == NULL) {
4984                         dev_err(&pdev->dev, "can't remap ctl region\n");
4985                         goto err_reg;
4986                 }
4987
4988                 /* Disable interrupts on the PLX before resetting it */
4989                 cy_writew(&ctl_addr->intr_ctrl_stat,
4990                                 readw(&ctl_addr->intr_ctrl_stat) & ~0x0900);
4991
4992                 plx_init(pdev, irq, addr0);
4993
4994                 mailbox = readl(&ctl_addr->mail_box_0);
4995
4996                 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
4997                                 mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
4998                 if (addr2 == NULL) {
4999                         dev_err(&pdev->dev, "can't remap base region\n");
5000                         goto err_unmap;
5001                 }
5002
5003                 if (mailbox == ZE_V1) {
5004                         card_name = "Cyclades-Ze";
5005                 } else {
5006                         card_name = "Cyclades-8Zo";
5007 #ifdef CY_PCI_DEBUG
5008                         if (mailbox == ZO_V1) {
5009                                 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5010                                 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5011                                         "id %lx, ver %lx\n", (ulong)(0xff &
5012                                         readl(&((struct CUSTOM_REG *)addr2)->
5013                                                 fpga_id)), (ulong)(0xff &
5014                                         readl(&((struct CUSTOM_REG *)addr2)->
5015                                                 fpga_version)));
5016                                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5017                         } else {
5018                                 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5019                                         "Cyclades-Z board.  FPGA not loaded\n");
5020                         }
5021 #endif
5022                         /* The following clears the firmware id word.  This
5023                            ensures that the driver will not attempt to talk to
5024                            the board until it has been properly initialized.
5025                          */
5026                         if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5027                                 cy_writel(addr2 + ID_ADDRESS, 0L);
5028                 }
5029
5030                 retval = cyz_load_fw(pdev, addr2, addr0, irq);
5031                 if (retval <= 0)
5032                         goto err_unmap;
5033                 nchan = retval;
5034         }
5035
5036         if ((cy_next_channel + nchan) > NR_PORTS) {
5037                 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5038                         "channels are available. Change NR_PORTS in "
5039                         "cyclades.c and recompile kernel.\n");
5040                 goto err_unmap;
5041         }
5042         /* fill the next cy_card structure available */
5043         for (card_no = 0; card_no < NR_CARDS; card_no++) {
5044                 if (cy_card[card_no].base_addr == NULL)
5045                         break;
5046         }
5047         if (card_no == NR_CARDS) {      /* no more cy_cards available */
5048                 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5049                         "more cards can be used. Change NR_CARDS in "
5050                         "cyclades.c and recompile kernel.\n");
5051                 goto err_unmap;
5052         }
5053
5054         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5055                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5056                 /* allocate IRQ */
5057                 retval = request_irq(irq, cyy_interrupt,
5058                                 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5059                 if (retval) {
5060                         dev_err(&pdev->dev, "could not allocate IRQ\n");
5061                         goto err_unmap;
5062                 }
5063                 cy_card[card_no].num_chips = nchan / CyPORTS_PER_CHIP;
5064         } else {
5065                 cy_card[card_no].hw_ver = mailbox;
5066                 cy_card[card_no].num_chips = (unsigned int)-1;
5067 #ifdef CONFIG_CYZ_INTR
5068                 /* allocate IRQ only if board has an IRQ */
5069                 if (irq != 0 && irq != 255) {
5070                         retval = request_irq(irq, cyz_interrupt,
5071                                         IRQF_SHARED, "Cyclades-Z",
5072                                         &cy_card[card_no]);
5073                         if (retval) {
5074                                 dev_err(&pdev->dev, "could not allocate IRQ\n");
5075                                 goto err_unmap;
5076                         }
5077                 }
5078 #endif                          /* CONFIG_CYZ_INTR */
5079         }
5080
5081         /* set cy_card */
5082         cy_card[card_no].base_addr = addr2;
5083         cy_card[card_no].ctl_addr.p9050 = addr0;
5084         cy_card[card_no].irq = irq;
5085         cy_card[card_no].bus_index = 1;
5086         cy_card[card_no].first_line = cy_next_channel;
5087         cy_card[card_no].nports = nchan;
5088         retval = cy_init_card(&cy_card[card_no]);
5089         if (retval)
5090                 goto err_null;
5091
5092         pci_set_drvdata(pdev, &cy_card[card_no]);
5093
5094         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5095                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5096                 /* enable interrupts in the PCI interface */
5097                 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5098                 switch (plx_ver) {
5099                 case PLX_9050:
5100                         cy_writeb(addr0 + 0x4c, 0x43);
5101                         break;
5102
5103                 case PLX_9060:
5104                 case PLX_9080:
5105                 default:        /* Old boards, use PLX_9060 */
5106                 {
5107                         struct RUNTIME_9060 __iomem *ctl_addr = addr0;
5108                         plx_init(pdev, irq, ctl_addr);
5109                         cy_writew(&ctl_addr->intr_ctrl_stat,
5110                                 readw(&ctl_addr->intr_ctrl_stat) | 0x0900);
5111                         break;
5112                 }
5113                 }
5114         }
5115
5116         dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5117                 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5118         for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5119                 tty_register_device(cy_serial_driver, i, &pdev->dev);
5120         cy_next_channel += nchan;
5121
5122         return 0;
5123 err_null:
5124         cy_card[card_no].base_addr = NULL;
5125         free_irq(irq, &cy_card[card_no]);
5126 err_unmap:
5127         iounmap(addr0);
5128         if (addr2)
5129                 iounmap(addr2);
5130 err_reg:
5131         pci_release_regions(pdev);
5132 err_dis:
5133         pci_disable_device(pdev);
5134 err:
5135         return retval;
5136 }
5137
5138 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5139 {
5140         struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5141         unsigned int i;
5142
5143         /* non-Z with old PLX */
5144         if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5145                         PLX_9050)
5146                 cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0);
5147         else
5148 #ifndef CONFIG_CYZ_INTR
5149                 if (!cy_is_Z(cinfo))
5150 #endif
5151                 cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat,
5152                         readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) &
5153                         ~0x0900);
5154
5155         iounmap(cinfo->base_addr);
5156         if (cinfo->ctl_addr.p9050)
5157                 iounmap(cinfo->ctl_addr.p9050);
5158         if (cinfo->irq
5159 #ifndef CONFIG_CYZ_INTR
5160                 && !cy_is_Z(cinfo)
5161 #endif /* CONFIG_CYZ_INTR */
5162                 )
5163                 free_irq(cinfo->irq, cinfo);
5164         pci_release_regions(pdev);
5165
5166         cinfo->base_addr = NULL;
5167         for (i = cinfo->first_line; i < cinfo->first_line +
5168                         cinfo->nports; i++)
5169                 tty_unregister_device(cy_serial_driver, i);
5170         cinfo->nports = 0;
5171         kfree(cinfo->ports);
5172 }
5173
5174 static struct pci_driver cy_pci_driver = {
5175         .name = "cyclades",
5176         .id_table = cy_pci_dev_id,
5177         .probe = cy_pci_probe,
5178         .remove = __devexit_p(cy_pci_remove)
5179 };
5180 #endif
5181
5182 static int cyclades_proc_show(struct seq_file *m, void *v)
5183 {
5184         struct cyclades_port *info;
5185         unsigned int i, j;
5186         __u32 cur_jifs = jiffies;
5187
5188         seq_puts(m, "Dev TimeOpen   BytesOut  IdleOut    BytesIn   "
5189                         "IdleIn  Overruns  Ldisc\n");
5190
5191         /* Output one line for each known port */
5192         for (i = 0; i < NR_CARDS; i++)
5193                 for (j = 0; j < cy_card[i].nports; j++) {
5194                         info = &cy_card[i].ports[j];
5195
5196                         if (info->port.count) {
5197                                 /* XXX is the ldisc num worth this? */
5198                                 struct tty_struct *tty;
5199                                 struct tty_ldisc *ld;
5200                                 int num = 0;
5201                                 tty = tty_port_tty_get(&info->port);
5202                                 if (tty) {
5203                                         ld = tty_ldisc_ref(tty);
5204                                         if (ld) {
5205                                                 num = ld->ops->num;
5206                                                 tty_ldisc_deref(ld);
5207                                         }
5208                                         tty_kref_put(tty);
5209                                 }
5210                                 seq_printf(m, "%3d %8lu %10lu %8lu "
5211                                         "%10lu %8lu %9lu %6d\n", info->line,
5212                                         (cur_jifs - info->idle_stats.in_use) /
5213                                         HZ, info->idle_stats.xmit_bytes,
5214                                         (cur_jifs - info->idle_stats.xmit_idle)/
5215                                         HZ, info->idle_stats.recv_bytes,
5216                                         (cur_jifs - info->idle_stats.recv_idle)/
5217                                         HZ, info->idle_stats.overruns,
5218                                         num);
5219                         } else
5220                                 seq_printf(m, "%3d %8lu %10lu %8lu "
5221                                         "%10lu %8lu %9lu %6ld\n",
5222                                         info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5223                 }
5224         return 0;
5225 }
5226
5227 static int cyclades_proc_open(struct inode *inode, struct file *file)
5228 {
5229         return single_open(file, cyclades_proc_show, NULL);
5230 }
5231
5232 static const struct file_operations cyclades_proc_fops = {
5233         .owner          = THIS_MODULE,
5234         .open           = cyclades_proc_open,
5235         .read           = seq_read,
5236         .llseek         = seq_lseek,
5237         .release        = single_release,
5238 };
5239
5240 /* The serial driver boot-time initialization code!
5241     Hardware I/O ports are mapped to character special devices on a
5242     first found, first allocated manner.  That is, this code searches
5243     for Cyclom cards in the system.  As each is found, it is probed
5244     to discover how many chips (and thus how many ports) are present.
5245     These ports are mapped to the tty ports 32 and upward in monotonic
5246     fashion.  If an 8-port card is replaced with a 16-port card, the
5247     port mapping on a following card will shift.
5248
5249     This approach is different from what is used in the other serial
5250     device driver because the Cyclom is more properly a multiplexer,
5251     not just an aggregation of serial ports on one card.
5252
5253     If there are more cards with more ports than have been
5254     statically allocated above, a warning is printed and the
5255     extra ports are ignored.
5256  */
5257
5258 static const struct tty_operations cy_ops = {
5259         .open = cy_open,
5260         .close = cy_close,
5261         .write = cy_write,
5262         .put_char = cy_put_char,
5263         .flush_chars = cy_flush_chars,
5264         .write_room = cy_write_room,
5265         .chars_in_buffer = cy_chars_in_buffer,
5266         .flush_buffer = cy_flush_buffer,
5267         .ioctl = cy_ioctl,
5268         .throttle = cy_throttle,
5269         .unthrottle = cy_unthrottle,
5270         .set_termios = cy_set_termios,
5271         .stop = cy_stop,
5272         .start = cy_start,
5273         .hangup = cy_hangup,
5274         .break_ctl = cy_break,
5275         .wait_until_sent = cy_wait_until_sent,
5276         .tiocmget = cy_tiocmget,
5277         .tiocmset = cy_tiocmset,
5278         .proc_fops = &cyclades_proc_fops,
5279 };
5280
5281 static int __init cy_init(void)
5282 {
5283         unsigned int nboards;
5284         int retval = -ENOMEM;
5285
5286         cy_serial_driver = alloc_tty_driver(NR_PORTS);
5287         if (!cy_serial_driver)
5288                 goto err;
5289
5290         printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5291                         __DATE__, __TIME__);
5292
5293         /* Initialize the tty_driver structure */
5294
5295         cy_serial_driver->owner = THIS_MODULE;
5296         cy_serial_driver->driver_name = "cyclades";
5297         cy_serial_driver->name = "ttyC";
5298         cy_serial_driver->major = CYCLADES_MAJOR;
5299         cy_serial_driver->minor_start = 0;
5300         cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5301         cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5302         cy_serial_driver->init_termios = tty_std_termios;
5303         cy_serial_driver->init_termios.c_cflag =
5304             B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5305         cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5306         tty_set_operations(cy_serial_driver, &cy_ops);
5307
5308         retval = tty_register_driver(cy_serial_driver);
5309         if (retval) {
5310                 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5311                 goto err_frtty;
5312         }
5313
5314         /* the code below is responsible to find the boards. Each different
5315            type of board has its own detection routine. If a board is found,
5316            the next cy_card structure available is set by the detection
5317            routine. These functions are responsible for checking the
5318            availability of cy_card and cy_port data structures and updating
5319            the cy_next_channel. */
5320
5321         /* look for isa boards */
5322         nboards = cy_detect_isa();
5323
5324 #ifdef CONFIG_PCI
5325         /* look for pci boards */
5326         retval = pci_register_driver(&cy_pci_driver);
5327         if (retval && !nboards) {
5328                 tty_unregister_driver(cy_serial_driver);
5329                 goto err_frtty;
5330         }
5331 #endif
5332
5333         return 0;
5334 err_frtty:
5335         put_tty_driver(cy_serial_driver);
5336 err:
5337         return retval;
5338 }                               /* cy_init */
5339
5340 static void __exit cy_cleanup_module(void)
5341 {
5342         struct cyclades_card *card;
5343         unsigned int i, e1;
5344
5345 #ifndef CONFIG_CYZ_INTR
5346         del_timer_sync(&cyz_timerlist);
5347 #endif /* CONFIG_CYZ_INTR */
5348
5349         e1 = tty_unregister_driver(cy_serial_driver);
5350         if (e1)
5351                 printk(KERN_ERR "failed to unregister Cyclades serial "
5352                                 "driver(%d)\n", e1);
5353
5354 #ifdef CONFIG_PCI
5355         pci_unregister_driver(&cy_pci_driver);
5356 #endif
5357
5358         for (i = 0; i < NR_CARDS; i++) {
5359                 card = &cy_card[i];
5360                 if (card->base_addr) {
5361                         /* clear interrupt */
5362                         cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5363                         iounmap(card->base_addr);
5364                         if (card->ctl_addr.p9050)
5365                                 iounmap(card->ctl_addr.p9050);
5366                         if (card->irq
5367 #ifndef CONFIG_CYZ_INTR
5368                                 && !cy_is_Z(card)
5369 #endif /* CONFIG_CYZ_INTR */
5370                                 )
5371                                 free_irq(card->irq, card);
5372                         for (e1 = card->first_line; e1 < card->first_line +
5373                                         card->nports; e1++)
5374                                 tty_unregister_device(cy_serial_driver, e1);
5375                         kfree(card->ports);
5376                 }
5377         }
5378
5379         put_tty_driver(cy_serial_driver);
5380 } /* cy_cleanup_module */
5381
5382 module_init(cy_init);
5383 module_exit(cy_cleanup_module);
5384
5385 MODULE_LICENSE("GPL");
5386 MODULE_VERSION(CY_VERSION);
5387 MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);