drivers/net/eexpress.c

   1 /* Intel EtherExpress 16 device driver for Linux
   2  *
   3  * Written by John Sullivan, 1995
   4  *  based on original code by Donald Becker, with changes by
   5  *  Alan Cox and Pauline Middelink.
   6  *
   7  * Support for 8-bit mode by Zoltan Szilagyi <zoltans@cs.arizona.edu>
   8  *
   9  * Many modifications, and currently maintained, by
  10  *  Philip Blundell <philb@gnu.org>
  11  * Added the Compaq LTE  Alan Cox <alan@redhat.com>
  12  * Added MCA support Adam Fritzler <mid@auk.cx>
  13  *
  14  * Note - this driver is experimental still - it has problems on faster
  15  * machines. Someone needs to sit down and go through it line by line with
  16  * a databook...
  17  */
  18
  19 /* The EtherExpress 16 is a fairly simple card, based on a shared-memory
  20  * design using the i82586 Ethernet coprocessor.  It bears no relationship,
  21  * as far as I know, to the similarly-named "EtherExpress Pro" range.
  22  *
  23  * Historically, Linux support for these cards has been very bad.  However,
  24  * things seem to be getting better slowly.
  25  */
  26
  27 /* If your card is confused about what sort of interface it has (eg it
  28  * persistently reports "10baseT" when none is fitted), running 'SOFTSET /BART'
  29  * or 'SOFTSET /LISA' from DOS seems to help.
  30  */
  31
  32 /* Here's the scoop on memory mapping.
  33  *
  34  * There are three ways to access EtherExpress card memory: either using the
  35  * shared-memory mapping, or using PIO through the dataport, or using PIO
  36  * through the "shadow memory" ports.
  37  *
  38  * The shadow memory system works by having the card map some of its memory
  39  * as follows:
  40  *
  41  * (the low five bits of the SMPTR are ignored)
  42  *
  43  *  base+0x4000..400f      memory at SMPTR+0..15
  44  *  base+0x8000..800f      memory at SMPTR+16..31
  45  *  base+0xc000..c007      dubious stuff (memory at SMPTR+16..23 apparently)
  46  *  base+0xc008..c00f      memory at 0x0008..0x000f
  47  *
  48  * This last set (the one at c008) is particularly handy because the SCB
  49  * lives at 0x0008.  So that set of ports gives us easy random access to data
  50  * in the SCB without having to mess around setting up pointers and the like.
  51  * We always use this method to access the SCB (via the scb_xx() functions).
  52  *
  53  * Dataport access works by aiming the appropriate (read or write) pointer
  54  * at the first address you're interested in, and then reading or writing from
  55  * the dataport.  The pointers auto-increment after each transfer.  We use
  56  * this for data transfer.
  57  *
  58  * We don't use the shared-memory system because it allegedly doesn't work on
  59  * all cards, and because it's a bit more prone to go wrong (it's one more
  60  * thing to configure...).
  61  */
  62
  63 /* Known bugs:
  64  *
  65  * - The card seems to want to give us two interrupts every time something
  66  *   happens, where just one would be better.
  67  */
  68
  69 /*
  70  *
  71  * Note by Zoltan Szilagyi 10-12-96:
  72  *
  73  * I've succeeded in eliminating the "CU wedged" messages, and hence the
  74  * lockups, which were only occurring with cards running in 8-bit mode ("force
  75  * 8-bit operation" in Intel's SoftSet utility). This version of the driver
  76  * sets the 82586 and the ASIC to 8-bit mode at startup; it also stops the
  77  * CU before submitting a packet for transmission, and then restarts it as soon
  78  * as the process of handing the packet is complete. This is definitely an
  79  * unnecessary slowdown if the card is running in 16-bit mode; therefore one
  80  * should detect 16-bit vs 8-bit mode from the EEPROM settings and act
  81  * accordingly. In 8-bit mode with this bugfix I'm getting about 150 K/s for
  82  * ftp's, which is significantly better than I get in DOS, so the overhead of
  83  * stopping and restarting the CU with each transmit is not prohibitive in
  84  * practice.
  85  *
  86  * Update by David Woodhouse 11/5/99:
  87  *
  88  * I've seen "CU wedged" messages in 16-bit mode, on the Alpha architecture.
  89  * I assume that this is because 16-bit accesses are actually handled as two
  90  * 8-bit accesses.
  91  */
  92
  93 #ifdef __alpha__
  94 #define LOCKUP16 1
  95 #endif
  96 #ifndef LOCKUP16
  97 #define LOCKUP16 0
  98 #endif
  99
 100 #include <linux/module.h>
 101 #include <linux/kernel.h>
 102 #include <linux/types.h>
 103 #include <linux/fcntl.h>
 104 #include <linux/interrupt.h>
 105 #include <linux/ioport.h>
 106 #include <linux/string.h>
 107 #include <linux/in.h>
 108 #include <linux/delay.h>
 109 #include <linux/errno.h>
 110 #include <linux/init.h>
 111 #include <linux/netdevice.h>
 112 #include <linux/etherdevice.h>
 113 #include <linux/skbuff.h>
 114 #include <linux/slab.h>
 115 #include <linux/mca-legacy.h>
 116 #include <linux/spinlock.h>
 117 #include <linux/bitops.h>
 118 #include <linux/jiffies.h>
 119
 120 #include <asm/system.h>
 121 #include <asm/io.h>
 122 #include <asm/irq.h>
 123
 124 #ifndef NET_DEBUG
 125 #define NET_DEBUG 4
 126 #endif
 127
 128 #include "eexpress.h"
 129
 130 #define EEXP_IO_EXTENT  16
 131
 132 /*
 133  * Private data declarations
 134  */
 135
 136 struct net_local
 137 {
 138         struct net_device_stats stats;
 139         unsigned long last_tx;       /* jiffies when last transmit started */
 140         unsigned long init_time;     /* jiffies when eexp_hw_init586 called */
 141         unsigned short rx_first;     /* first rx buf, same as RX_BUF_START */
 142         unsigned short rx_last;      /* last rx buf */
 143         unsigned short rx_ptr;       /* first rx buf to look at */
 144         unsigned short tx_head;      /* next free tx buf */
 145         unsigned short tx_reap;      /* first in-use tx buf */
 146         unsigned short tx_tail;      /* previous tx buf to tx_head */
 147         unsigned short tx_link;      /* last known-executing tx buf */
 148         unsigned short last_tx_restart;   /* set to tx_link when we
 149                                              restart the CU */
 150         unsigned char started;
 151         unsigned short rx_buf_start;
 152         unsigned short rx_buf_end;
 153         unsigned short num_tx_bufs;
 154         unsigned short num_rx_bufs;
 155         unsigned char width;         /* 0 for 16bit, 1 for 8bit */
 156         unsigned char was_promisc;
 157         unsigned char old_mc_count;
 158         spinlock_t lock;
 159 };
 160
 161 /* This is the code and data that is downloaded to the EtherExpress card's
 162  * memory at boot time.
 163  */
 164
 165 static unsigned short start_code[] = {
 166 /* 0x0000 */
 167         0x0001,                 /* ISCP: busy - cleared after reset */
 168         0x0008,0x0000,0x0000,   /* offset,address (lo,hi) of SCB */
 169
 170         0x0000,0x0000,          /* SCB: status, commands */
 171         0x0000,0x0000,          /* links to first command block,
 172                                    first receive descriptor */
 173         0x0000,0x0000,          /* CRC error, alignment error counts */
 174         0x0000,0x0000,          /* out of resources, overrun error counts */
 175
 176         0x0000,0x0000,          /* pad */
 177         0x0000,0x0000,
 178
 179 /* 0x20 -- start of 82586 CU program */
 180 #define CONF_LINK 0x20
 181         0x0000,Cmd_Config,
 182         0x0032,                 /* link to next command */
 183         0x080c,                 /* 12 bytes follow : fifo threshold=8 */
 184         0x2e40,                 /* don't rx bad frames
 185                                  * SRDY/ARDY => ext. sync. : preamble len=8
 186                                  * take addresses from data buffers
 187                                  * 6 bytes/address
 188                                  */
 189         0x6000,                 /* default backoff method & priority
 190                                  * interframe spacing = 0x60 */
 191         0xf200,                 /* slot time=0x200
 192                                  * max collision retry = 0xf */
 193 #define CONF_PROMISC  0x2e
 194         0x0000,                 /* no HDLC : normal CRC : enable broadcast
 195                                  * disable promiscuous/multicast modes */
 196         0x003c,                 /* minimum frame length = 60 octets) */
 197
 198         0x0000,Cmd_SetAddr,
 199         0x003e,                 /* link to next command */
 200 #define CONF_HWADDR  0x38
 201         0x0000,0x0000,0x0000,   /* hardware address placed here */
 202
 203         0x0000,Cmd_MCast,
 204         0x0076,                 /* link to next command */
 205 #define CONF_NR_MULTICAST 0x44
 206         0x0000,                 /* number of multicast addresses */
 207 #define CONF_MULTICAST 0x46
 208         0x0000, 0x0000, 0x0000, /* some addresses */
 209         0x0000, 0x0000, 0x0000,
 210         0x0000, 0x0000, 0x0000,
 211         0x0000, 0x0000, 0x0000,
 212         0x0000, 0x0000, 0x0000,
 213         0x0000, 0x0000, 0x0000,
 214         0x0000, 0x0000, 0x0000,
 215         0x0000, 0x0000, 0x0000,
 216
 217 #define CONF_DIAG_RESULT  0x76
 218         0x0000, Cmd_Diag,
 219         0x007c,                 /* link to next command */
 220
 221         0x0000,Cmd_TDR|Cmd_INT,
 222         0x0084,
 223 #define CONF_TDR_RESULT  0x82
 224         0x0000,
 225
 226         0x0000,Cmd_END|Cmd_Nop, /* end of configure sequence */
 227         0x0084                  /* dummy link */
 228 };
 229
 230 /* maps irq number to EtherExpress magic value */
 231 static char irqrmap[] = { 0,0,1,2,3,4,0,0,0,1,5,6,0,0,0,0 };
 232
 233 #ifdef CONFIG_MCA_LEGACY
 234 /* mapping of the first four bits of the second POS register */
 235 static unsigned short mca_iomap[] = {
 236         0x270, 0x260, 0x250, 0x240, 0x230, 0x220, 0x210, 0x200,
 237         0x370, 0x360, 0x350, 0x340, 0x330, 0x320, 0x310, 0x300
 238 };
 239 /* bits 5-7 of the second POS register */
 240 static char mca_irqmap[] = { 12, 9, 3, 4, 5, 10, 11, 15 };
 241 #endif
 242
 243 /*
 244  * Prototypes for Linux interface
 245  */
 246
 247 static int eexp_open(struct net_device *dev);
 248 static int eexp_close(struct net_device *dev);
 249 static void eexp_timeout(struct net_device *dev);
 250 static struct net_device_stats *eexp_stats(struct net_device *dev);
 251 static int eexp_xmit(struct sk_buff *buf, struct net_device *dev);
 252
 253 static irqreturn_t eexp_irq(int irq, void *dev_addr);
 254 static void eexp_set_multicast(struct net_device *dev);
 255
 256 /*
 257  * Prototypes for hardware access functions
 258  */
 259
 260 static void eexp_hw_rx_pio(struct net_device *dev);
 261 static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
 262                        unsigned short len);
 263 static int eexp_hw_probe(struct net_device *dev,unsigned short ioaddr);
 264 static unsigned short eexp_hw_readeeprom(unsigned short ioaddr,
 265                                          unsigned char location);
 266
 267 static unsigned short eexp_hw_lasttxstat(struct net_device *dev);
 268 static void eexp_hw_txrestart(struct net_device *dev);
 269
 270 static void eexp_hw_txinit    (struct net_device *dev);
 271 static void eexp_hw_rxinit    (struct net_device *dev);
 272
 273 static void eexp_hw_init586   (struct net_device *dev);
 274 static void eexp_setup_filter (struct net_device *dev);
 275
 276 static char *eexp_ifmap[]={"AUI", "BNC", "RJ45"};
 277 enum eexp_iftype {AUI=0, BNC=1, TPE=2};
 278
 279 #define STARTED_RU      2
 280 #define STARTED_CU      1
 281
 282 /*
 283  * Primitive hardware access functions.
 284  */
 285
 286 static inline unsigned short scb_status(struct net_device *dev)
 287 {
 288         return inw(dev->base_addr + 0xc008);
 289 }
 290
 291 static inline unsigned short scb_rdcmd(struct net_device *dev)
 292 {
 293         return inw(dev->base_addr + 0xc00a);
 294 }
 295
 296 static inline void scb_command(struct net_device *dev, unsigned short cmd)
 297 {
 298         outw(cmd, dev->base_addr + 0xc00a);
 299 }
 300
 301 static inline void scb_wrcbl(struct net_device *dev, unsigned short val)
 302 {
 303         outw(val, dev->base_addr + 0xc00c);
 304 }
 305
 306 static inline void scb_wrrfa(struct net_device *dev, unsigned short val)
 307 {
 308         outw(val, dev->base_addr + 0xc00e);
 309 }
 310
 311 static inline void set_loopback(struct net_device *dev)
 312 {
 313         outb(inb(dev->base_addr + Config) | 2, dev->base_addr + Config);
 314 }
 315
 316 static inline void clear_loopback(struct net_device *dev)
 317 {
 318         outb(inb(dev->base_addr + Config) & ~2, dev->base_addr + Config);
 319 }
 320
 321 static inline unsigned short int SHADOW(short int addr)
 322 {
 323         addr &= 0x1f;
 324         if (addr > 0xf) addr += 0x3ff0;
 325         return addr + 0x4000;
 326 }
 327
 328 /*
 329  * Linux interface
 330  */
 331
 332 /*
 333  * checks for presence of EtherExpress card
 334  */
 335
 336 static int __init do_express_probe(struct net_device *dev)
 337 {
 338         unsigned short *port;
 339         static unsigned short ports[] = { 0x240,0x300,0x310,0x270,0x320,0x340,0 };
 340         unsigned short ioaddr = dev->base_addr;
 341         int dev_irq = dev->irq;
 342         int err;
 343
 344         dev->if_port = 0xff; /* not set */
 345
 346 #ifdef CONFIG_MCA_LEGACY
 347         if (MCA_bus) {
 348                 int slot = 0;
 349
 350                 /*
 351                  * Only find one card at a time.  Subsequent calls
 352                  * will find others, however, proper multicard MCA
 353                  * probing and setup can't be done with the
 354                  * old-style Space.c init routines.  -- ASF
 355                  */
 356                 while (slot != MCA_NOTFOUND) {
 357                         int pos0, pos1;
 358
 359                         slot = mca_find_unused_adapter(0x628B, slot);
 360                         if (slot == MCA_NOTFOUND)
 361                                 break;
 362
 363                         pos0 = mca_read_stored_pos(slot, 2);
 364                         pos1 = mca_read_stored_pos(slot, 3);
 365                         ioaddr = mca_iomap[pos1&0xf];
 366
 367                         dev->irq = mca_irqmap[(pos1>>4)&0x7];
 368
 369                         /*
 370                          * XXX: Transciever selection is done
 371                          * differently on the MCA version.
 372                          * How to get it to select something
 373                          * other than external/AUI is currently
 374                          * unknown.  This code is just for looks. -- ASF
 375                          */
 376                         if ((pos0 & 0x7) == 0x1)
 377                                 dev->if_port = AUI;
 378                         else if ((pos0 & 0x7) == 0x5) {
 379                                 if (pos1 & 0x80)
 380                                         dev->if_port = BNC;
 381                                 else
 382                                         dev->if_port = TPE;
 383                         }
 384
 385                         mca_set_adapter_name(slot, "Intel EtherExpress 16 MCA");
 386                         mca_set_adapter_procfn(slot, NULL, dev);
 387                         mca_mark_as_used(slot);
 388
 389                         break;
 390                 }
 391         }
 392 #endif
 393         if (ioaddr&0xfe00) {
 394                 if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress"))
 395                         return -EBUSY;
 396                 err = eexp_hw_probe(dev,ioaddr);
 397                 release_region(ioaddr, EEXP_IO_EXTENT);
 398                 return err;
 399         } else if (ioaddr)
 400                 return -ENXIO;
 401
 402         for (port=&ports[0] ; *port ; port++ )
 403         {
 404                 unsigned short sum = 0;
 405                 int i;
 406                 if (!request_region(*port, EEXP_IO_EXTENT, "EtherExpress"))
 407                         continue;
 408                 for ( i=0 ; i<4 ; i++ )
 409                 {
 410                         unsigned short t;
 411                         t = inb(*port + ID_PORT);
 412                         sum |= (t>>4) << ((t & 0x03)<<2);
 413                 }
 414                 if (sum==0xbaba && !eexp_hw_probe(dev,*port)) {
 415                         release_region(*port, EEXP_IO_EXTENT);
 416                         return 0;
 417                 }
 418                 release_region(*port, EEXP_IO_EXTENT);
 419                 dev->irq = dev_irq;
 420         }
 421         return -ENODEV;
 422 }
 423
 424 #ifndef MODULE
 425 struct net_device * __init express_probe(int unit)
 426 {
 427         struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
 428         int err;
 429
 430         if (!dev)
 431                 return ERR_PTR(-ENOMEM);
 432
 433         sprintf(dev->name, "eth%d", unit);
 434         netdev_boot_setup_check(dev);
 435
 436         err = do_express_probe(dev);
 437         if (!err)
 438                 return dev;
 439         free_netdev(dev);
 440         return ERR_PTR(err);
 441 }
 442 #endif
 443
 444 /*
 445  * open and initialize the adapter, ready for use
 446  */
 447
 448 static int eexp_open(struct net_device *dev)
 449 {
 450         int ret;
 451         unsigned short ioaddr = dev->base_addr;
 452         struct net_local *lp = netdev_priv(dev);
 453
 454 #if NET_DEBUG > 6
 455         printk(KERN_DEBUG "%s: eexp_open()\n", dev->name);
 456 #endif
 457
 458         if (!dev->irq || !irqrmap[dev->irq])
 459                 return -ENXIO;
 460
 461         ret = request_irq(dev->irq,&eexp_irq,0,dev->name,dev);
 462         if (ret) return ret;
 463
 464         if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress")) {
 465                 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
 466                         , ioaddr);
 467                 goto err_out1;
 468         }
 469         if (!request_region(ioaddr+0x4000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
 470                 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
 471                         , ioaddr+0x4000);
 472                 goto err_out2;
 473         }
 474         if (!request_region(ioaddr+0x8000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
 475                 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
 476                         , ioaddr+0x8000);
 477                 goto err_out3;
 478         }
 479         if (!request_region(ioaddr+0xc000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
 480                 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
 481                         , ioaddr+0xc000);
 482                 goto err_out4;
 483         }
 484
 485         if (lp->width) {
 486                 printk("%s: forcing ASIC to 8-bit mode\n", dev->name);
 487                 outb(inb(dev->base_addr+Config)&~4, dev->base_addr+Config);
 488         }
 489
 490         eexp_hw_init586(dev);
 491         netif_start_queue(dev);
 492 #if NET_DEBUG > 6
 493         printk(KERN_DEBUG "%s: leaving eexp_open()\n", dev->name);
 494 #endif
 495         return 0;
 496
 497         err_out4:
 498                 release_region(ioaddr+0x8000, EEXP_IO_EXTENT);
 499         err_out3:
 500                 release_region(ioaddr+0x4000, EEXP_IO_EXTENT);
 501         err_out2:
 502                 release_region(ioaddr, EEXP_IO_EXTENT);
 503         err_out1:
 504                 free_irq(dev->irq, dev);
 505                 return -EBUSY;
 506 }
 507
 508 /*
 509  * close and disable the interface, leaving the 586 in reset.
 510  */
 511
 512 static int eexp_close(struct net_device *dev)
 513 {
 514         unsigned short ioaddr = dev->base_addr;
 515         struct net_local *lp = netdev_priv(dev);
 516
 517         int irq = dev->irq;
 518
 519         netif_stop_queue(dev);
 520
 521         outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
 522         lp->started = 0;
 523         scb_command(dev, SCB_CUsuspend|SCB_RUsuspend);
 524         outb(0,ioaddr+SIGNAL_CA);
 525         free_irq(irq,dev);
 526         outb(i586_RST,ioaddr+EEPROM_Ctrl);
 527         release_region(ioaddr, EEXP_IO_EXTENT);
 528         release_region(ioaddr+0x4000, 16);
 529         release_region(ioaddr+0x8000, 16);
 530         release_region(ioaddr+0xc000, 16);
 531
 532         return 0;
 533 }
 534
 535 /*
 536  * Return interface stats
 537  */
 538
 539 static struct net_device_stats *eexp_stats(struct net_device *dev)
 540 {
 541         struct net_local *lp = netdev_priv(dev);
 542
 543         return &lp->stats;
 544 }
 545
 546 /*
 547  * This gets called when a higher level thinks we are broken.  Check that
 548  * nothing has become jammed in the CU.
 549  */
 550
 551 static void unstick_cu(struct net_device *dev)
 552 {
 553         struct net_local *lp = netdev_priv(dev);
 554         unsigned short ioaddr = dev->base_addr;
 555
 556         if (lp->started)
 557         {
 558                 if (time_after(jiffies, dev->trans_start + 50))
 559                 {
 560                         if (lp->tx_link==lp->last_tx_restart)
 561                         {
 562                                 unsigned short boguscount=200,rsst;
 563                                 printk(KERN_WARNING "%s: Retransmit timed out, status %04x, resetting...\n",
 564                                        dev->name, scb_status(dev));
 565                                 eexp_hw_txinit(dev);
 566                                 lp->last_tx_restart = 0;
 567                                 scb_wrcbl(dev, lp->tx_link);
 568                                 scb_command(dev, SCB_CUstart);
 569                                 outb(0,ioaddr+SIGNAL_CA);
 570                                 while (!SCB_complete(rsst=scb_status(dev)))
 571                                 {
 572                                         if (!--boguscount)
 573                                         {
 574                                                 boguscount=200;
 575                                                 printk(KERN_WARNING "%s: Reset timed out status %04x, retrying...\n",
 576                                                        dev->name,rsst);
 577                                                 scb_wrcbl(dev, lp->tx_link);
 578                                                 scb_command(dev, SCB_CUstart);
 579                                                 outb(0,ioaddr+SIGNAL_CA);
 580                                         }
 581                                 }
 582                                 netif_wake_queue(dev);
 583                         }
 584                         else
 585                         {
 586                                 unsigned short status = scb_status(dev);
 587                                 if (SCB_CUdead(status))
 588                                 {
 589                                         unsigned short txstatus = eexp_hw_lasttxstat(dev);
 590                                         printk(KERN_WARNING "%s: Transmit timed out, CU not active status %04x %04x, restarting...\n",
 591                                                dev->name, status, txstatus);
 592                                         eexp_hw_txrestart(dev);
 593                                 }
 594                                 else
 595                                 {
 596                                         unsigned short txstatus = eexp_hw_lasttxstat(dev);
 597                                         if (netif_queue_stopped(dev) && !txstatus)
 598                                         {
 599                                                 printk(KERN_WARNING "%s: CU wedged, status %04x %04x, resetting...\n",
 600                                                        dev->name,status,txstatus);
 601                                                 eexp_hw_init586(dev);
 602                                                 netif_wake_queue(dev);
 603                                         }
 604                                         else
 605                                         {
 606                                                 printk(KERN_WARNING "%s: transmit timed out\n", dev->name);
 607                                         }
 608                                 }
 609                         }
 610                 }
 611         }
 612         else
 613         {
 614                 if (time_after(jiffies, lp->init_time + 10))
 615                 {
 616                         unsigned short status = scb_status(dev);
 617                         printk(KERN_WARNING "%s: i82586 startup timed out, status %04x, resetting...\n",
 618                                dev->name, status);
 619                         eexp_hw_init586(dev);
 620                         netif_wake_queue(dev);
 621                 }
 622         }
 623 }
 624
 625 static void eexp_timeout(struct net_device *dev)
 626 {
 627         struct net_local *lp = netdev_priv(dev);
 628 #ifdef CONFIG_SMP
 629         unsigned long flags;
 630 #endif
 631         int status;
 632
 633         disable_irq(dev->irq);
 634
 635         /*
 636          *      Best would be to use synchronize_irq(); spin_lock() here
 637          *      lets make it work first..
 638          */
 639
 640 #ifdef CONFIG_SMP
 641         spin_lock_irqsave(&lp->lock, flags);
 642 #endif
 643
 644         status = scb_status(dev);
 645         unstick_cu(dev);
 646         printk(KERN_INFO "%s: transmit timed out, %s?\n", dev->name,
 647                (SCB_complete(status)?"lost interrupt":
 648                 "board on fire"));
 649         lp->stats.tx_errors++;
 650         lp->last_tx = jiffies;
 651         if (!SCB_complete(status)) {
 652                 scb_command(dev, SCB_CUabort);
 653                 outb(0,dev->base_addr+SIGNAL_CA);
 654         }
 655         netif_wake_queue(dev);
 656 #ifdef CONFIG_SMP
 657         spin_unlock_irqrestore(&lp->lock, flags);
 658 #endif
 659 }
 660
 661 /*
 662  * Called to transmit a packet, or to allow us to right ourselves
 663  * if the kernel thinks we've died.
 664  */
 665 static int eexp_xmit(struct sk_buff *buf, struct net_device *dev)
 666 {
 667         struct net_local *lp = netdev_priv(dev);
 668         short length = buf->len;
 669 #ifdef CONFIG_SMP
 670         unsigned long flags;
 671 #endif
 672
 673 #if NET_DEBUG > 6
 674         printk(KERN_DEBUG "%s: eexp_xmit()\n", dev->name);
 675 #endif
 676
 677         if (buf->len < ETH_ZLEN) {
 678                 if (skb_padto(buf, ETH_ZLEN))
 679                         return 0;
 680                 length = ETH_ZLEN;
 681         }
 682
 683         disable_irq(dev->irq);
 684
 685         /*
 686          *      Best would be to use synchronize_irq(); spin_lock() here
 687          *      lets make it work first..
 688          */
 689
 690 #ifdef CONFIG_SMP
 691         spin_lock_irqsave(&lp->lock, flags);
 692 #endif
 693
 694         {
 695                 unsigned short *data = (unsigned short *)buf->data;
 696
 697                 lp->stats.tx_bytes += length;
 698
 699                 eexp_hw_tx_pio(dev,data,length);
 700         }
 701         dev_kfree_skb(buf);
 702 #ifdef CONFIG_SMP
 703         spin_unlock_irqrestore(&lp->lock, flags);
 704 #endif
 705         enable_irq(dev->irq);
 706         return 0;
 707 }
 708
 709 /*
 710  * Handle an EtherExpress interrupt
 711  * If we've finished initializing, start the RU and CU up.
 712  * If we've already started, reap tx buffers, handle any received packets,
 713  * check to make sure we've not become wedged.
 714  */
 715
 716 static unsigned short eexp_start_irq(struct net_device *dev,
 717                                      unsigned short status)
 718 {
 719         unsigned short ack_cmd = SCB_ack(status);
 720         struct net_local *lp = netdev_priv(dev);
 721         unsigned short ioaddr = dev->base_addr;
 722         if ((dev->flags & IFF_UP) && !(lp->started & STARTED_CU)) {
 723                 short diag_status, tdr_status;
 724                 while (SCB_CUstat(status)==2)
 725                         status = scb_status(dev);
 726 #if NET_DEBUG > 4
 727                 printk("%s: CU went non-active (status %04x)\n",
 728                        dev->name, status);
 729 #endif
 730
 731                 outw(CONF_DIAG_RESULT & ~31, ioaddr + SM_PTR);
 732                 diag_status = inw(ioaddr + SHADOW(CONF_DIAG_RESULT));
 733                 if (diag_status & 1<<11) {
 734                         printk(KERN_WARNING "%s: 82586 failed self-test\n",
 735                                dev->name);
 736                 } else if (!(diag_status & 1<<13)) {
 737                         printk(KERN_WARNING "%s: 82586 self-test failed to complete\n", dev->name);
 738                 }
 739
 740                 outw(CONF_TDR_RESULT & ~31, ioaddr + SM_PTR);
 741                 tdr_status = inw(ioaddr + SHADOW(CONF_TDR_RESULT));
 742                 if (tdr_status & (TDR_SHORT|TDR_OPEN)) {
 743                         printk(KERN_WARNING "%s: TDR reports cable %s at %d tick%s\n", dev->name, (tdr_status & TDR_SHORT)?"short":"broken", tdr_status & TDR_TIME, ((tdr_status & TDR_TIME) != 1) ? "s" : "");
 744                 }
 745                 else if (tdr_status & TDR_XCVRPROBLEM) {
 746                         printk(KERN_WARNING "%s: TDR reports transceiver problem\n", dev->name);
 747                 }
 748                 else if (tdr_status & TDR_LINKOK) {
 749 #if NET_DEBUG > 4
 750                         printk(KERN_DEBUG "%s: TDR reports link OK\n", dev->name);
 751 #endif
 752                 } else {
 753                         printk("%s: TDR is ga-ga (status %04x)\n", dev->name,
 754                                tdr_status);
 755                 }
 756
 757                 lp->started |= STARTED_CU;
 758                 scb_wrcbl(dev, lp->tx_link);
 759                 /* if the RU isn't running, start it now */
 760                 if (!(lp->started & STARTED_RU)) {
 761                         ack_cmd |= SCB_RUstart;
 762                         scb_wrrfa(dev, lp->rx_buf_start);
 763                         lp->rx_ptr = lp->rx_buf_start;
 764                         lp->started |= STARTED_RU;
 765                 }
 766                 ack_cmd |= SCB_CUstart | 0x2000;
 767         }
 768
 769         if ((dev->flags & IFF_UP) && !(lp->started & STARTED_RU) && SCB_RUstat(status)==4)
 770                 lp->started|=STARTED_RU;
 771
 772         return ack_cmd;
 773 }
 774
 775 static void eexp_cmd_clear(struct net_device *dev)
 776 {
 777         unsigned long int oldtime = jiffies;
 778         while (scb_rdcmd(dev) && (time_before(jiffies, oldtime + 10)));
 779         if (scb_rdcmd(dev)) {
 780                 printk("%s: command didn't clear\n", dev->name);
 781         }
 782 }
 783
 784 static irqreturn_t eexp_irq(int irq, void *dev_info)
 785 {
 786         struct net_device *dev = dev_info;
 787         struct net_local *lp;
 788         unsigned short ioaddr,status,ack_cmd;
 789         unsigned short old_read_ptr, old_write_ptr;
 790
 791         lp = netdev_priv(dev);
 792         ioaddr = dev->base_addr;
 793
 794         spin_lock(&lp->lock);
 795
 796         old_read_ptr = inw(ioaddr+READ_PTR);
 797         old_write_ptr = inw(ioaddr+WRITE_PTR);
 798
 799         outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
 800
 801
 802         status = scb_status(dev);
 803
 804 #if NET_DEBUG > 4
 805         printk(KERN_DEBUG "%s: interrupt (status %x)\n", dev->name, status);
 806 #endif
 807
 808         if (lp->started == (STARTED_CU | STARTED_RU)) {
 809
 810                 do {
 811                         eexp_cmd_clear(dev);
 812
 813                         ack_cmd = SCB_ack(status);
 814                         scb_command(dev, ack_cmd);
 815                         outb(0,ioaddr+SIGNAL_CA);
 816
 817                         eexp_cmd_clear(dev);
 818
 819                         if (SCB_complete(status)) {
 820                                 if (!eexp_hw_lasttxstat(dev)) {
 821                                         printk("%s: tx interrupt but no status\n", dev->name);
 822                                 }
 823                         }
 824
 825                         if (SCB_rxdframe(status))
 826                                 eexp_hw_rx_pio(dev);
 827
 828                         status = scb_status(dev);
 829                 } while (status & 0xc000);
 830
 831                 if (SCB_RUdead(status))
 832                 {
 833                         printk(KERN_WARNING "%s: RU stopped: status %04x\n",
 834                                dev->name,status);
 835 #if 0
 836                         printk(KERN_WARNING "%s: cur_rfd=%04x, cur_rbd=%04x\n", dev->name, lp->cur_rfd, lp->cur_rbd);
 837                         outw(lp->cur_rfd, ioaddr+READ_PTR);
 838                         printk(KERN_WARNING "%s: [%04x]\n", dev->name, inw(ioaddr+DATAPORT));
 839                         outw(lp->cur_rfd+6, ioaddr+READ_PTR);
 840                         printk(KERN_WARNING "%s: rbd is %04x\n", dev->name, rbd= inw(ioaddr+DATAPORT));
 841                         outw(rbd, ioaddr+READ_PTR);
 842                         printk(KERN_WARNING "%s: [%04x %04x] ", dev->name, inw(ioaddr+DATAPORT), inw(ioaddr+DATAPORT));
 843                         outw(rbd+8, ioaddr+READ_PTR);
 844                         printk("[%04x]\n", inw(ioaddr+DATAPORT));
 845 #endif
 846                         lp->stats.rx_errors++;
 847 #if 1
 848                         eexp_hw_rxinit(dev);
 849 #else
 850                         lp->cur_rfd = lp->first_rfd;
 851 #endif
 852                         scb_wrrfa(dev, lp->rx_buf_start);
 853                         scb_command(dev, SCB_RUstart);
 854                         outb(0,ioaddr+SIGNAL_CA);
 855                 }
 856         } else {
 857                 if (status & 0x8000)
 858                         ack_cmd = eexp_start_irq(dev, status);
 859                 else
 860                         ack_cmd = SCB_ack(status);
 861                 scb_command(dev, ack_cmd);
 862                 outb(0,ioaddr+SIGNAL_CA);
 863         }
 864
 865         eexp_cmd_clear(dev);
 866
 867         outb(SIRQ_en|irqrmap[irq],ioaddr+SET_IRQ);
 868
 869 #if NET_DEBUG > 6
 870         printk("%s: leaving eexp_irq()\n", dev->name);
 871 #endif
 872         outw(old_read_ptr, ioaddr+READ_PTR);
 873         outw(old_write_ptr, ioaddr+WRITE_PTR);
 874
 875         spin_unlock(&lp->lock);
 876         return IRQ_HANDLED;
 877 }
 878
 879 /*
 880  * Hardware access functions
 881  */
 882
 883 /*
 884  * Set the cable type to use.
 885  */
 886
 887 static void eexp_hw_set_interface(struct net_device *dev)
 888 {
 889         unsigned char oldval = inb(dev->base_addr + 0x300e);
 890         oldval &= ~0x82;
 891         switch (dev->if_port) {
 892         case TPE:
 893                 oldval |= 0x2;
 894         case BNC:
 895                 oldval |= 0x80;
 896                 break;
 897         }
 898         outb(oldval, dev->base_addr+0x300e);
 899         mdelay(20);
 900 }
 901
 902 /*
 903  * Check all the receive buffers, and hand any received packets
 904  * to the upper levels. Basic sanity check on each frame
 905  * descriptor, though we don't bother trying to fix broken ones.
 906  */
 907
 908 static void eexp_hw_rx_pio(struct net_device *dev)
 909 {
 910         struct net_local *lp = netdev_priv(dev);
 911         unsigned short rx_block = lp->rx_ptr;
 912         unsigned short boguscount = lp->num_rx_bufs;
 913         unsigned short ioaddr = dev->base_addr;
 914         unsigned short status;
 915
 916 #if NET_DEBUG > 6
 917         printk(KERN_DEBUG "%s: eexp_hw_rx()\n", dev->name);
 918 #endif
 919
 920         do {
 921                 unsigned short rfd_cmd, rx_next, pbuf, pkt_len;
 922
 923                 outw(rx_block, ioaddr + READ_PTR);
 924                 status = inw(ioaddr + DATAPORT);
 925
 926                 if (FD_Done(status))
 927                 {
 928                         rfd_cmd = inw(ioaddr + DATAPORT);
 929                         rx_next = inw(ioaddr + DATAPORT);
 930                         pbuf = inw(ioaddr + DATAPORT);
 931
 932                         outw(pbuf, ioaddr + READ_PTR);
 933                         pkt_len = inw(ioaddr + DATAPORT);
 934
 935                         if (rfd_cmd!=0x0000)
 936                         {
 937                                 printk(KERN_WARNING "%s: rfd_cmd not zero:0x%04x\n",
 938                                        dev->name, rfd_cmd);
 939                                 continue;
 940                         }
 941                         else if (pbuf!=rx_block+0x16)
 942                         {
 943                                 printk(KERN_WARNING "%s: rfd and rbd out of sync 0x%04x 0x%04x\n",
 944                                        dev->name, rx_block+0x16, pbuf);
 945                                 continue;
 946                         }
 947                         else if ((pkt_len & 0xc000)!=0xc000)
 948                         {
 949                                 printk(KERN_WARNING "%s: EOF or F not set on received buffer (%04x)\n",
 950                                        dev->name, pkt_len & 0xc000);
 951                                 continue;
 952                         }
 953                         else if (!FD_OK(status))
 954                         {
 955                                 lp->stats.rx_errors++;
 956                                 if (FD_CRC(status))
 957                                         lp->stats.rx_crc_errors++;
 958                                 if (FD_Align(status))
 959                                         lp->stats.rx_frame_errors++;
 960                                 if (FD_Resrc(status))
 961                                         lp->stats.rx_fifo_errors++;
 962                                 if (FD_DMA(status))
 963                                         lp->stats.rx_over_errors++;
 964                                 if (FD_Short(status))
 965                                         lp->stats.rx_length_errors++;
 966                         }
 967                         else
 968                         {
 969                                 struct sk_buff *skb;
 970                                 pkt_len &= 0x3fff;
 971                                 skb = dev_alloc_skb(pkt_len+16);
 972                                 if (skb == NULL)
 973                                 {
 974                                         printk(KERN_WARNING "%s: Memory squeeze, dropping packet\n",dev->name);
 975                                         lp->stats.rx_dropped++;
 976                                         break;
 977                                 }
 978                                 skb_reserve(skb, 2);
 979                                 outw(pbuf+10, ioaddr+READ_PTR);
 980                                 insw(ioaddr+DATAPORT, skb_put(skb,pkt_len),(pkt_len+1)>>1);
 981                                 skb->protocol = eth_type_trans(skb,dev);
 982                                 netif_rx(skb);
 983                                 dev->last_rx = jiffies;
 984                                 lp->stats.rx_packets++;
 985                                 lp->stats.rx_bytes += pkt_len;
 986                         }
 987                         outw(rx_block, ioaddr+WRITE_PTR);
 988                         outw(0, ioaddr+DATAPORT);
 989                         outw(0, ioaddr+DATAPORT);
 990                         rx_block = rx_next;
 991                 }
 992         } while (FD_Done(status) && boguscount--);
 993         lp->rx_ptr = rx_block;
 994 }
 995
 996 /*
 997  * Hand a packet to the card for transmission
 998  * If we get here, we MUST have already checked
 999  * to make sure there is room in the transmit
1000  * buffer region.
1001  */
1002
1003 static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
1004                        unsigned short len)
1005 {
1006         struct net_local *lp = netdev_priv(dev);
1007         unsigned short ioaddr = dev->base_addr;
1008
1009         if (LOCKUP16 || lp->width) {
1010                 /* Stop the CU so that there is no chance that it
1011                    jumps off to a bogus address while we are writing the
1012                    pointer to the next transmit packet in 8-bit mode --
1013                    this eliminates the "CU wedged" errors in 8-bit mode.
1014                    (Zoltan Szilagyi 10-12-96) */
1015                 scb_command(dev, SCB_CUsuspend);
1016                 outw(0xFFFF, ioaddr+SIGNAL_CA);
1017         }
1018
1019         outw(lp->tx_head, ioaddr + WRITE_PTR);
1020
1021         outw(0x0000, ioaddr + DATAPORT);
1022         outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
1023         outw(lp->tx_head+0x08, ioaddr + DATAPORT);
1024         outw(lp->tx_head+0x0e, ioaddr + DATAPORT);
1025
1026         outw(0x0000, ioaddr + DATAPORT);
1027         outw(0x0000, ioaddr + DATAPORT);
1028         outw(lp->tx_head+0x08, ioaddr + DATAPORT);
1029
1030         outw(0x8000|len, ioaddr + DATAPORT);
1031         outw(-1, ioaddr + DATAPORT);
1032         outw(lp->tx_head+0x16, ioaddr + DATAPORT);
1033         outw(0, ioaddr + DATAPORT);
1034
1035         outsw(ioaddr + DATAPORT, buf, (len+1)>>1);
1036
1037         outw(lp->tx_tail+0xc, ioaddr + WRITE_PTR);
1038         outw(lp->tx_head, ioaddr + DATAPORT);
1039
1040         dev->trans_start = jiffies;
1041         lp->tx_tail = lp->tx_head;
1042         if (lp->tx_head==TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
1043                 lp->tx_head = TX_BUF_START;
1044         else
1045                 lp->tx_head += TX_BUF_SIZE;
1046         if (lp->tx_head != lp->tx_reap)
1047                 netif_wake_queue(dev);
1048
1049         if (LOCKUP16 || lp->width) {
1050                 /* Restart the CU so that the packet can actually
1051                    be transmitted. (Zoltan Szilagyi 10-12-96) */
1052                 scb_command(dev, SCB_CUresume);
1053                 outw(0xFFFF, ioaddr+SIGNAL_CA);
1054         }
1055
1056         lp->stats.tx_packets++;
1057         lp->last_tx = jiffies;
1058 }
1059
1060 /*
1061  * Sanity check the suspected EtherExpress card
1062  * Read hardware address, reset card, size memory and initialize buffer
1063  * memory pointers. These are held in dev->priv, in case someone has more
1064  * than one card in a machine.
1065  */
1066
1067 static int __init eexp_hw_probe(struct net_device *dev, unsigned short ioaddr)
1068 {
1069         unsigned short hw_addr[3];
1070         unsigned char buswidth;
1071         unsigned int memory_size;
1072         int i;
1073         unsigned short xsum = 0;
1074         struct net_local *lp = netdev_priv(dev);
1075
1076         printk("%s: EtherExpress 16 at %#x ",dev->name,ioaddr);
1077
1078         outb(ASIC_RST, ioaddr+EEPROM_Ctrl);
1079         outb(0, ioaddr+EEPROM_Ctrl);
1080         udelay(500);
1081         outb(i586_RST, ioaddr+EEPROM_Ctrl);
1082
1083         hw_addr[0] = eexp_hw_readeeprom(ioaddr,2);
1084         hw_addr[1] = eexp_hw_readeeprom(ioaddr,3);
1085         hw_addr[2] = eexp_hw_readeeprom(ioaddr,4);
1086
1087         /* Standard Address or Compaq LTE Address */
1088         if (!((hw_addr[2]==0x00aa && ((hw_addr[1] & 0xff00)==0x0000)) ||
1089               (hw_addr[2]==0x0080 && ((hw_addr[1] & 0xff00)==0x5F00))))
1090         {
1091                 printk(" rejected: invalid address %04x%04x%04x\n",
1092                         hw_addr[2],hw_addr[1],hw_addr[0]);
1093                 return -ENODEV;
1094         }
1095
1096         /* Calculate the EEPROM checksum.  Carry on anyway if it's bad,
1097          * though.
1098          */
1099         for (i = 0; i < 64; i++)
1100                 xsum += eexp_hw_readeeprom(ioaddr, i);
1101         if (xsum != 0xbaba)
1102                 printk(" (bad EEPROM xsum 0x%02x)", xsum);
1103
1104         dev->base_addr = ioaddr;
1105         for ( i=0 ; i<6 ; i++ )
1106                 dev->dev_addr[i] = ((unsigned char *)hw_addr)[5-i];
1107
1108         {
1109                 static char irqmap[]={0, 9, 3, 4, 5, 10, 11, 0};
1110                 unsigned short setupval = eexp_hw_readeeprom(ioaddr,0);
1111
1112                 /* Use the IRQ from EEPROM if none was given */
1113                 if (!dev->irq)
1114                         dev->irq = irqmap[setupval>>13];
1115
1116                 if (dev->if_port == 0xff) {
1117                         dev->if_port = !(setupval & 0x1000) ? AUI :
1118                                 eexp_hw_readeeprom(ioaddr,5) & 0x1 ? TPE : BNC;
1119                 }
1120
1121                 buswidth = !((setupval & 0x400) >> 10);
1122         }
1123
1124         memset(lp, 0, sizeof(struct net_local));
1125         spin_lock_init(&lp->lock);
1126
1127         printk("(IRQ %d, %s connector, %d-bit bus", dev->irq,
1128                eexp_ifmap[dev->if_port], buswidth?8:16);
1129
1130         if (!request_region(dev->base_addr + 0x300e, 1, "EtherExpress"))
1131                 return -EBUSY;
1132
1133         eexp_hw_set_interface(dev);
1134
1135         release_region(dev->base_addr + 0x300e, 1);
1136
1137         /* Find out how much RAM we have on the card */
1138         outw(0, dev->base_addr + WRITE_PTR);
1139         for (i = 0; i < 32768; i++)
1140                 outw(0, dev->base_addr + DATAPORT);
1141
1142         for (memory_size = 0; memory_size < 64; memory_size++)
1143         {
1144                 outw(memory_size<<10, dev->base_addr + READ_PTR);
1145                 if (inw(dev->base_addr+DATAPORT))
1146                         break;
1147                 outw(memory_size<<10, dev->base_addr + WRITE_PTR);
1148                 outw(memory_size | 0x5000, dev->base_addr+DATAPORT);
1149                 outw(memory_size<<10, dev->base_addr + READ_PTR);
1150                 if (inw(dev->base_addr+DATAPORT) != (memory_size | 0x5000))
1151                         break;
1152         }
1153
1154         /* Sort out the number of buffers.  We may have 16, 32, 48 or 64k
1155          * of RAM to play with.
1156          */
1157         lp->num_tx_bufs = 4;
1158         lp->rx_buf_end = 0x3ff6;
1159         switch (memory_size)
1160         {
1161         case 64:
1162                 lp->rx_buf_end += 0x4000;
1163         case 48:
1164                 lp->num_tx_bufs += 4;
1165                 lp->rx_buf_end += 0x4000;
1166         case 32:
1167                 lp->rx_buf_end += 0x4000;
1168         case 16:
1169                 printk(", %dk RAM)\n", memory_size);
1170                 break;
1171         default:
1172                 printk(") bad memory size (%dk).\n", memory_size);
1173                 return -ENODEV;
1174                 break;
1175         }
1176
1177         lp->rx_buf_start = TX_BUF_START + (lp->num_tx_bufs*TX_BUF_SIZE);
1178         lp->width = buswidth;
1179
1180         dev->open = eexp_open;
1181         dev->stop = eexp_close;
1182         dev->hard_start_xmit = eexp_xmit;
1183         dev->get_stats = eexp_stats;
1184         dev->set_multicast_list = &eexp_set_multicast;
1185         dev->tx_timeout = eexp_timeout;
1186         dev->watchdog_timeo = 2*HZ;
1187
1188         return register_netdev(dev);
1189 }
1190
1191 /*
1192  * Read a word from the EtherExpress on-board serial EEPROM.
1193  * The EEPROM contains 64 words of 16 bits.
1194  */
1195 static unsigned short __init eexp_hw_readeeprom(unsigned short ioaddr,
1196                                                     unsigned char location)
1197 {
1198         unsigned short cmd = 0x180|(location&0x7f);
1199         unsigned short rval = 0,wval = EC_CS|i586_RST;
1200         int i;
1201
1202         outb(EC_CS|i586_RST,ioaddr+EEPROM_Ctrl);
1203         for (i=0x100 ; i ; i>>=1 )
1204         {
1205                 if (cmd&i)
1206                         wval |= EC_Wr;
1207                 else
1208                         wval &= ~EC_Wr;
1209
1210                 outb(wval,ioaddr+EEPROM_Ctrl);
1211                 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1212                 eeprom_delay();
1213                 outb(wval,ioaddr+EEPROM_Ctrl);
1214                 eeprom_delay();
1215         }
1216         wval &= ~EC_Wr;
1217         outb(wval,ioaddr+EEPROM_Ctrl);
1218         for (i=0x8000 ; i ; i>>=1 )
1219         {
1220                 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1221                 eeprom_delay();
1222                 if (inb(ioaddr+EEPROM_Ctrl)&EC_Rd)
1223                         rval |= i;
1224                 outb(wval,ioaddr+EEPROM_Ctrl);
1225                 eeprom_delay();
1226         }
1227         wval &= ~EC_CS;
1228         outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1229         eeprom_delay();
1230         outb(wval,ioaddr+EEPROM_Ctrl);
1231         eeprom_delay();
1232         return rval;
1233 }
1234
1235 /*
1236  * Reap tx buffers and return last transmit status.
1237  * if ==0 then either:
1238  *    a) we're not transmitting anything, so why are we here?
1239  *    b) we've died.
1240  * otherwise, Stat_Busy(return) means we've still got some packets
1241  * to transmit, Stat_Done(return) means our buffers should be empty
1242  * again
1243  */
1244
1245 static unsigned short eexp_hw_lasttxstat(struct net_device *dev)
1246 {
1247         struct net_local *lp = netdev_priv(dev);
1248         unsigned short tx_block = lp->tx_reap;
1249         unsigned short status;
1250
1251         if (!netif_queue_stopped(dev) && lp->tx_head==lp->tx_reap)
1252                 return 0x0000;
1253
1254         do
1255         {
1256                 outw(tx_block & ~31, dev->base_addr + SM_PTR);
1257                 status = inw(dev->base_addr + SHADOW(tx_block));
1258                 if (!Stat_Done(status))
1259                 {
1260                         lp->tx_link = tx_block;
1261                         return status;
1262                 }
1263                 else
1264                 {
1265                         lp->last_tx_restart = 0;
1266                         lp->stats.collisions += Stat_NoColl(status);
1267                         if (!Stat_OK(status))
1268                         {
1269                                 char *whatsup = NULL;
1270                                 lp->stats.tx_errors++;
1271                                 if (Stat_Abort(status))
1272                                         lp->stats.tx_aborted_errors++;
1273                                 if (Stat_TNoCar(status)) {
1274                                         whatsup = "aborted, no carrier";
1275                                         lp->stats.tx_carrier_errors++;
1276                                 }
1277                                 if (Stat_TNoCTS(status)) {
1278                                         whatsup = "aborted, lost CTS";
1279                                         lp->stats.tx_carrier_errors++;
1280                                 }
1281                                 if (Stat_TNoDMA(status)) {
1282                                         whatsup = "FIFO underran";
1283                                         lp->stats.tx_fifo_errors++;
1284                                 }
1285                                 if (Stat_TXColl(status)) {
1286                                         whatsup = "aborted, too many collisions";
1287                                         lp->stats.tx_aborted_errors++;
1288                                 }
1289                                 if (whatsup)
1290                                         printk(KERN_INFO "%s: transmit %s\n",
1291                                                dev->name, whatsup);
1292                         }
1293                         else
1294                                 lp->stats.tx_packets++;
1295                 }
1296                 if (tx_block == TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
1297                         lp->tx_reap = tx_block = TX_BUF_START;
1298                 else
1299                         lp->tx_reap = tx_block += TX_BUF_SIZE;
1300                 netif_wake_queue(dev);
1301         }
1302         while (lp->tx_reap != lp->tx_head);
1303
1304         lp->tx_link = lp->tx_tail + 0x08;
1305
1306         return status;
1307 }
1308
1309 /*
1310  * This should never happen. It is called when some higher routine detects
1311  * that the CU has stopped, to try to restart it from the last packet we knew
1312  * we were working on, or the idle loop if we had finished for the time.
1313  */
1314
1315 static void eexp_hw_txrestart(struct net_device *dev)
1316 {
1317         struct net_local *lp = netdev_priv(dev);
1318         unsigned short ioaddr = dev->base_addr;
1319
1320         lp->last_tx_restart = lp->tx_link;
1321         scb_wrcbl(dev, lp->tx_link);
1322         scb_command(dev, SCB_CUstart);
1323         outb(0,ioaddr+SIGNAL_CA);
1324
1325         {
1326                 unsigned short boguscount=50,failcount=5;
1327                 while (!scb_status(dev))
1328                 {
1329                         if (!--boguscount)
1330                         {
1331                                 if (--failcount)
1332                                 {
1333                                         printk(KERN_WARNING "%s: CU start timed out, status %04x, cmd %04x\n", dev->name, scb_status(dev), scb_rdcmd(dev));
1334                                         scb_wrcbl(dev, lp->tx_link);
1335                                         scb_command(dev, SCB_CUstart);
1336                                         outb(0,ioaddr+SIGNAL_CA);
1337                                         boguscount = 100;
1338                                 }
1339                                 else
1340                                 {
1341                                         printk(KERN_WARNING "%s: Failed to restart CU, resetting board...\n",dev->name);
1342                                         eexp_hw_init586(dev);
1343                                         netif_wake_queue(dev);
1344                                         return;
1345                                 }
1346                         }
1347                 }
1348         }
1349 }
1350
1351 /*
1352  * Writes down the list of transmit buffers into card memory.  Each
1353  * entry consists of an 82586 transmit command, followed by a jump
1354  * pointing to itself.  When we want to transmit a packet, we write
1355  * the data into the appropriate transmit buffer and then modify the
1356  * preceding jump to point at the new transmit command.  This means that
1357  * the 586 command unit is continuously active.
1358  */
1359
1360 static void eexp_hw_txinit(struct net_device *dev)
1361 {
1362         struct net_local *lp = netdev_priv(dev);
1363         unsigned short tx_block = TX_BUF_START;
1364         unsigned short curtbuf;
1365         unsigned short ioaddr = dev->base_addr;
1366
1367         for ( curtbuf=0 ; curtbuf<lp->num_tx_bufs ; curtbuf++ )
1368         {
1369                 outw(tx_block, ioaddr + WRITE_PTR);
1370
1371                 outw(0x0000, ioaddr + DATAPORT);
1372                 outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
1373                 outw(tx_block+0x08, ioaddr + DATAPORT);
1374                 outw(tx_block+0x0e, ioaddr + DATAPORT);
1375
1376                 outw(0x0000, ioaddr + DATAPORT);
1377                 outw(0x0000, ioaddr + DATAPORT);
1378                 outw(tx_block+0x08, ioaddr + DATAPORT);
1379
1380                 outw(0x8000, ioaddr + DATAPORT);
1381                 outw(-1, ioaddr + DATAPORT);
1382                 outw(tx_block+0x16, ioaddr + DATAPORT);
1383                 outw(0x0000, ioaddr + DATAPORT);
1384
1385                 tx_block += TX_BUF_SIZE;
1386         }
1387         lp->tx_head = TX_BUF_START;
1388         lp->tx_reap = TX_BUF_START;
1389         lp->tx_tail = tx_block - TX_BUF_SIZE;
1390         lp->tx_link = lp->tx_tail + 0x08;
1391         lp->rx_buf_start = tx_block;
1392
1393 }
1394
1395 /*
1396  * Write the circular list of receive buffer descriptors to card memory.
1397  * The end of the list isn't marked, which means that the 82586 receive
1398  * unit will loop until buffers become available (this avoids it giving us
1399  * "out of resources" messages).
1400  */
1401
1402 static void eexp_hw_rxinit(struct net_device *dev)
1403 {
1404         struct net_local *lp = netdev_priv(dev);
1405         unsigned short rx_block = lp->rx_buf_start;
1406         unsigned short ioaddr = dev->base_addr;
1407
1408         lp->num_rx_bufs = 0;
1409         lp->rx_first = lp->rx_ptr = rx_block;
1410         do
1411         {
1412                 lp->num_rx_bufs++;
1413
1414                 outw(rx_block, ioaddr + WRITE_PTR);
1415
1416                 outw(0, ioaddr + DATAPORT);  outw(0, ioaddr+DATAPORT);
1417                 outw(rx_block + RX_BUF_SIZE, ioaddr+DATAPORT);
1418                 outw(0xffff, ioaddr+DATAPORT);
1419
1420                 outw(0x0000, ioaddr+DATAPORT);
1421                 outw(0xdead, ioaddr+DATAPORT);
1422                 outw(0xdead, ioaddr+DATAPORT);
1423                 outw(0xdead, ioaddr+DATAPORT);
1424                 outw(0xdead, ioaddr+DATAPORT);
1425                 outw(0xdead, ioaddr+DATAPORT);
1426                 outw(0xdead, ioaddr+DATAPORT);
1427
1428                 outw(0x0000, ioaddr+DATAPORT);
1429                 outw(rx_block + RX_BUF_SIZE + 0x16, ioaddr+DATAPORT);
1430                 outw(rx_block + 0x20, ioaddr+DATAPORT);
1431                 outw(0, ioaddr+DATAPORT);
1432                 outw(RX_BUF_SIZE-0x20, ioaddr+DATAPORT);
1433
1434                 lp->rx_last = rx_block;
1435                 rx_block += RX_BUF_SIZE;
1436         } while (rx_block <= lp->rx_buf_end-RX_BUF_SIZE);
1437
1438
1439         /* Make first Rx frame descriptor point to first Rx buffer
1440            descriptor */
1441         outw(lp->rx_first + 6, ioaddr+WRITE_PTR);
1442         outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
1443
1444         /* Close Rx frame descriptor ring */
1445         outw(lp->rx_last + 4, ioaddr+WRITE_PTR);
1446         outw(lp->rx_first, ioaddr+DATAPORT);
1447
1448         /* Close Rx buffer descriptor ring */
1449         outw(lp->rx_last + 0x16 + 2, ioaddr+WRITE_PTR);
1450         outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
1451
1452 }
1453
1454 /*
1455  * Un-reset the 586, and start the configuration sequence. We don't wait for
1456  * this to finish, but allow the interrupt handler to start the CU and RU for
1457  * us.  We can't start the receive/transmission system up before we know that
1458  * the hardware is configured correctly.
1459  */
1460
1461 static void eexp_hw_init586(struct net_device *dev)
1462 {
1463         struct net_local *lp = netdev_priv(dev);
1464         unsigned short ioaddr = dev->base_addr;
1465         int i;
1466
1467 #if NET_DEBUG > 6
1468         printk("%s: eexp_hw_init586()\n", dev->name);
1469 #endif
1470
1471         lp->started = 0;
1472
1473         set_loopback(dev);
1474
1475         outb(SIRQ_dis|irqrmap[dev->irq],ioaddr+SET_IRQ);
1476
1477         /* Download the startup code */
1478         outw(lp->rx_buf_end & ~31, ioaddr + SM_PTR);
1479         outw(lp->width?0x0001:0x0000, ioaddr + 0x8006);
1480         outw(0x0000, ioaddr + 0x8008);
1481         outw(0x0000, ioaddr + 0x800a);
1482         outw(0x0000, ioaddr + 0x800c);
1483         outw(0x0000, ioaddr + 0x800e);
1484
1485         for (i = 0; i < (sizeof(start_code)); i+=32) {
1486                 int j;
1487                 outw(i, ioaddr + SM_PTR);
1488                 for (j = 0; j < 16; j+=2)
1489                         outw(start_code[(i+j)/2],
1490                              ioaddr+0x4000+j);
1491                 for (j = 0; j < 16; j+=2)
1492                         outw(start_code[(i+j+16)/2],
1493                              ioaddr+0x8000+j);
1494         }
1495
1496         /* Do we want promiscuous mode or multicast? */
1497         outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
1498         i = inw(ioaddr+SHADOW(CONF_PROMISC));
1499         outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
1500              ioaddr+SHADOW(CONF_PROMISC));
1501         lp->was_promisc = dev->flags & IFF_PROMISC;
1502 #if 0
1503         eexp_setup_filter(dev);
1504 #endif
1505
1506         /* Write our hardware address */
1507         outw(CONF_HWADDR & ~31, ioaddr+SM_PTR);
1508         outw(((unsigned short *)dev->dev_addr)[0], ioaddr+SHADOW(CONF_HWADDR));
1509         outw(((unsigned short *)dev->dev_addr)[1],
1510              ioaddr+SHADOW(CONF_HWADDR+2));
1511         outw(((unsigned short *)dev->dev_addr)[2],
1512              ioaddr+SHADOW(CONF_HWADDR+4));
1513
1514         eexp_hw_txinit(dev);
1515         eexp_hw_rxinit(dev);
1516
1517         outb(0,ioaddr+EEPROM_Ctrl);
1518         mdelay(5);
1519
1520         scb_command(dev, 0xf000);
1521         outb(0,ioaddr+SIGNAL_CA);
1522
1523         outw(0, ioaddr+SM_PTR);
1524
1525         {
1526                 unsigned short rboguscount=50,rfailcount=5;
1527                 while (inw(ioaddr+0x4000))
1528                 {
1529                         if (!--rboguscount)
1530                         {
1531                                 printk(KERN_WARNING "%s: i82586 reset timed out, kicking...\n",
1532                                         dev->name);
1533                                 scb_command(dev, 0);
1534                                 outb(0,ioaddr+SIGNAL_CA);
1535                                 rboguscount = 100;
1536                                 if (!--rfailcount)
1537                                 {
1538                                         printk(KERN_WARNING "%s: i82586 not responding, giving up.\n",
1539                                                 dev->name);
1540                                         return;
1541                                 }
1542                         }
1543                 }
1544         }
1545
1546         scb_wrcbl(dev, CONF_LINK);
1547         scb_command(dev, 0xf000|SCB_CUstart);
1548         outb(0,ioaddr+SIGNAL_CA);
1549
1550         {
1551                 unsigned short iboguscount=50,ifailcount=5;
1552                 while (!scb_status(dev))
1553                 {
1554                         if (!--iboguscount)
1555                         {
1556                                 if (--ifailcount)
1557                                 {
1558                                         printk(KERN_WARNING "%s: i82586 initialization timed out, status %04x, cmd %04x\n",
1559                                                 dev->name, scb_status(dev), scb_rdcmd(dev));
1560                                         scb_wrcbl(dev, CONF_LINK);
1561                                         scb_command(dev, 0xf000|SCB_CUstart);
1562                                         outb(0,ioaddr+SIGNAL_CA);
1563                                         iboguscount = 100;
1564                                 }
1565                                 else
1566                                 {
1567                                         printk(KERN_WARNING "%s: Failed to initialize i82586, giving up.\n",dev->name);
1568                                         return;
1569                                 }
1570                         }
1571                 }
1572         }
1573
1574         clear_loopback(dev);
1575         outb(SIRQ_en|irqrmap[dev->irq],ioaddr+SET_IRQ);
1576
1577         lp->init_time = jiffies;
1578 #if NET_DEBUG > 6
1579         printk("%s: leaving eexp_hw_init586()\n", dev->name);
1580 #endif
1581         return;
1582 }
1583
1584 static void eexp_setup_filter(struct net_device *dev)
1585 {
1586         struct dev_mc_list *dmi = dev->mc_list;
1587         unsigned short ioaddr = dev->base_addr;
1588         int count = dev->mc_count;
1589         int i;
1590         if (count > 8) {
1591                 printk(KERN_INFO "%s: too many multicast addresses (%d)\n",
1592                        dev->name, count);
1593                 count = 8;
1594         }
1595
1596         outw(CONF_NR_MULTICAST & ~31, ioaddr+SM_PTR);
1597         outw(count, ioaddr+SHADOW(CONF_NR_MULTICAST));
1598         for (i = 0; i < count; i++) {
1599                 unsigned short *data = (unsigned short *)dmi->dmi_addr;
1600                 if (!dmi) {
1601                         printk(KERN_INFO "%s: too few multicast addresses\n", dev->name);
1602                         break;
1603                 }
1604                 if (dmi->dmi_addrlen != ETH_ALEN) {
1605                         printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name);
1606                         continue;
1607                 }
1608                 outw((CONF_MULTICAST+(6*i)) & ~31, ioaddr+SM_PTR);
1609                 outw(data[0], ioaddr+SHADOW(CONF_MULTICAST+(6*i)));
1610                 outw((CONF_MULTICAST+(6*i)+2) & ~31, ioaddr+SM_PTR);
1611                 outw(data[1], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+2));
1612                 outw((CONF_MULTICAST+(6*i)+4) & ~31, ioaddr+SM_PTR);
1613                 outw(data[2], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+4));
1614         }
1615 }
1616
1617 /*
1618  * Set or clear the multicast filter for this adaptor.
1619  */
1620 static void
1621 eexp_set_multicast(struct net_device *dev)
1622 {
1623         unsigned short ioaddr = dev->base_addr;
1624         struct net_local *lp = netdev_priv(dev);
1625         int kick = 0, i;
1626         if ((dev->flags & IFF_PROMISC) != lp->was_promisc) {
1627                 outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
1628                 i = inw(ioaddr+SHADOW(CONF_PROMISC));
1629                 outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
1630                      ioaddr+SHADOW(CONF_PROMISC));
1631                 lp->was_promisc = dev->flags & IFF_PROMISC;
1632                 kick = 1;
1633         }
1634         if (!(dev->flags & IFF_PROMISC)) {
1635                 eexp_setup_filter(dev);
1636                 if (lp->old_mc_count != dev->mc_count) {
1637                         kick = 1;
1638                         lp->old_mc_count = dev->mc_count;
1639                 }
1640         }
1641         if (kick) {
1642                 unsigned long oj;
1643                 scb_command(dev, SCB_CUsuspend);
1644                 outb(0, ioaddr+SIGNAL_CA);
1645                 outb(0, ioaddr+SIGNAL_CA);
1646 #if 0
1647                 printk("%s: waiting for CU to go suspended\n", dev->name);
1648 #endif
1649                 oj = jiffies;
1650                 while ((SCB_CUstat(scb_status(dev)) == 2) &&
1651                        (time_before(jiffies, oj + 2000)));
1652                 if (SCB_CUstat(scb_status(dev)) == 2)
1653                         printk("%s: warning, CU didn't stop\n", dev->name);
1654                 lp->started &= ~(STARTED_CU);
1655                 scb_wrcbl(dev, CONF_LINK);
1656                 scb_command(dev, SCB_CUstart);
1657                 outb(0, ioaddr+SIGNAL_CA);
1658         }
1659 }
1660
1661
1662 /*
1663  * MODULE stuff
1664  */
1665
1666 #ifdef MODULE
1667
1668 #define EEXP_MAX_CARDS     4    /* max number of cards to support */
1669
1670 static struct net_device *dev_eexp[EEXP_MAX_CARDS];
1671 static int irq[EEXP_MAX_CARDS];
1672 static int io[EEXP_MAX_CARDS];
1673
1674 module_param_array(io, int, NULL, 0);
1675 module_param_array(irq, int, NULL, 0);
1676 MODULE_PARM_DESC(io, "EtherExpress 16 I/O base address(es)");
1677 MODULE_PARM_DESC(irq, "EtherExpress 16 IRQ number(s)");
1678 MODULE_LICENSE("GPL");
1679
1680
1681 /* Ideally the user would give us io=, irq= for every card.  If any parameters
1682  * are specified, we verify and then use them.  If no parameters are given, we
1683  * autoprobe for one card only.
1684  */
1685 int __init init_module(void)
1686 {
1687         struct net_device *dev;
1688         int this_dev, found = 0;
1689
1690         for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
1691                 dev = alloc_etherdev(sizeof(struct net_local));
1692                 dev->irq = irq[this_dev];
1693                 dev->base_addr = io[this_dev];
1694                 if (io[this_dev] == 0) {
1695                         if (this_dev)
1696                                 break;
1697                         printk(KERN_NOTICE "eexpress.c: Module autoprobe not recommended, give io=xx.\n");
1698                 }
1699                 if (do_express_probe(dev) == 0) {
1700                         dev_eexp[this_dev] = dev;
1701                         found++;
1702                         continue;
1703                 }
1704                 printk(KERN_WARNING "eexpress.c: Failed to register card at 0x%x.\n", io[this_dev]);
1705                 free_netdev(dev);
1706                 break;
1707         }
1708         if (found)
1709                 return 0;
1710         return -ENXIO;
1711 }
1712
1713 void __exit cleanup_module(void)
1714 {
1715         int this_dev;
1716
1717         for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
1718                 struct net_device *dev = dev_eexp[this_dev];
1719                 if (dev) {
1720                         unregister_netdev(dev);
1721                         free_netdev(dev);
1722                 }
1723         }
1724 }
1725 #endif
1726
1727 /*
1728  * Local Variables:
1729  *  c-file-style: "linux"
1730  *  tab-width: 8
1731  * End:
1732  */