drivers/net/usb/hso.c

   1 /******************************************************************************
   2  *
   3  * Driver for Option High Speed Mobile Devices.
   4  *
   5  *  Copyright (C) 2008 Option International
   6  *                     Filip Aben <f.aben@option.com>
   7  *                     Denis Joseph Barrow <d.barow@option.com>
   8  *                     Jan Dumon <j.dumon@option.com>
   9  *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
  10  *                      <ajb@spheresystems.co.uk>
  11  *  Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
  12  *  Copyright (C) 2008 Novell, Inc.
  13  *
  14  *  This program is free software; you can redistribute it and/or modify
  15  *  it under the terms of the GNU General Public License version 2 as
  16  *  published by the Free Software Foundation.
  17  *
  18  *  This program is distributed in the hope that it will be useful,
  19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *  GNU General Public License for more details.
  22  *
  23  *  You should have received a copy of the GNU General Public License
  24  *  along with this program; if not, write to the Free Software
  25  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  26  *  USA
  27  *
  28  *
  29  *****************************************************************************/
  30
  31 /******************************************************************************
  32  *
  33  * Description of the device:
  34  *
  35  * Interface 0: Contains the IP network interface on the bulk end points.
  36  *              The multiplexed serial ports are using the interrupt and
  37  *              control endpoints.
  38  *              Interrupt contains a bitmap telling which multiplexed
  39  *              serialport needs servicing.
  40  *
  41  * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
  42  *              port is opened, as this have a huge impact on the network port
  43  *              throughput.
  44  *
  45  * Interface 2: Standard modem interface - circuit switched interface, this
  46  *              can be used to make a standard ppp connection however it
  47  *              should not be used in conjunction with the IP network interface
  48  *              enabled for USB performance reasons i.e. if using this set
  49  *              ideally disable_net=1.
  50  *
  51  *****************************************************************************/
  52
  53 #include <linux/sched.h>
  54 #include <linux/slab.h>
  55 #include <linux/init.h>
  56 #include <linux/delay.h>
  57 #include <linux/netdevice.h>
  58 #include <linux/module.h>
  59 #include <linux/ethtool.h>
  60 #include <linux/usb.h>
  61 #include <linux/timer.h>
  62 #include <linux/tty.h>
  63 #include <linux/tty_driver.h>
  64 #include <linux/tty_flip.h>
  65 #include <linux/kmod.h>
  66 #include <linux/rfkill.h>
  67 #include <linux/ip.h>
  68 #include <linux/uaccess.h>
  69 #include <linux/usb/cdc.h>
  70 #include <net/arp.h>
  71 #include <asm/byteorder.h>
  72 #include <linux/serial_core.h>
  73 #include <linux/serial.h>
  74
  75
  76 #define MOD_AUTHOR                      "Option Wireless"
  77 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
  78 #define MOD_LICENSE                     "GPL"
  79
  80 #define HSO_MAX_NET_DEVICES             10
  81 #define HSO__MAX_MTU                    2048
  82 #define DEFAULT_MTU                     1500
  83 #define DEFAULT_MRU                     1500
  84
  85 #define CTRL_URB_RX_SIZE                1024
  86 #define CTRL_URB_TX_SIZE                64
  87
  88 #define BULK_URB_RX_SIZE                4096
  89 #define BULK_URB_TX_SIZE                8192
  90
  91 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
  92 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
  93 #define MUX_BULK_RX_BUF_COUNT           4
  94 #define USB_TYPE_OPTION_VENDOR          0x20
  95
  96 /* These definitions are used with the struct hso_net flags element */
  97 /* - use *_bit operations on it. (bit indices not values.) */
  98 #define HSO_NET_RUNNING                 0
  99
 100 #define HSO_NET_TX_TIMEOUT              (HZ*10)
 101
 102 #define HSO_SERIAL_MAGIC                0x48534f31
 103
 104 /* Number of ttys to handle */
 105 #define HSO_SERIAL_TTY_MINORS           256
 106
 107 #define MAX_RX_URBS                     2
 108
 109 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
 110 {
 111         if (tty)
 112                 return tty->driver_data;
 113         return NULL;
 114 }
 115
 116 /*****************************************************************************/
 117 /* Debugging functions                                                       */
 118 /*****************************************************************************/
 119 #define D__(lvl_, fmt, arg...)                          \
 120         do {                                            \
 121                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
 122                        __LINE__, __func__, ## arg);     \
 123         } while (0)
 124
 125 #define D_(lvl, args...)                                \
 126         do {                                            \
 127                 if (lvl & debug)                        \
 128                         D__(KERN_INFO, args);           \
 129         } while (0)
 130
 131 #define D1(args...)     D_(0x01, ##args)
 132 #define D2(args...)     D_(0x02, ##args)
 133 #define D3(args...)     D_(0x04, ##args)
 134 #define D4(args...)     D_(0x08, ##args)
 135 #define D5(args...)     D_(0x10, ##args)
 136
 137 /*****************************************************************************/
 138 /* Enumerators                                                               */
 139 /*****************************************************************************/
 140 enum pkt_parse_state {
 141         WAIT_IP,
 142         WAIT_DATA,
 143         WAIT_SYNC
 144 };
 145
 146 /*****************************************************************************/
 147 /* Structs                                                                   */
 148 /*****************************************************************************/
 149
 150 struct hso_shared_int {
 151         struct usb_endpoint_descriptor *intr_endp;
 152         void *shared_intr_buf;
 153         struct urb *shared_intr_urb;
 154         struct usb_device *usb;
 155         int use_count;
 156         int ref_count;
 157         struct mutex shared_int_lock;
 158 };
 159
 160 struct hso_net {
 161         struct hso_device *parent;
 162         struct net_device *net;
 163         struct rfkill *rfkill;
 164
 165         struct usb_endpoint_descriptor *in_endp;
 166         struct usb_endpoint_descriptor *out_endp;
 167
 168         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
 169         struct urb *mux_bulk_tx_urb;
 170         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
 171         void *mux_bulk_tx_buf;
 172
 173         struct sk_buff *skb_rx_buf;
 174         struct sk_buff *skb_tx_buf;
 175
 176         enum pkt_parse_state rx_parse_state;
 177         spinlock_t net_lock;
 178
 179         unsigned short rx_buf_size;
 180         unsigned short rx_buf_missing;
 181         struct iphdr rx_ip_hdr;
 182
 183         unsigned long flags;
 184 };
 185
 186 enum rx_ctrl_state{
 187         RX_IDLE,
 188         RX_SENT,
 189         RX_PENDING
 190 };
 191
 192 #define BM_REQUEST_TYPE (0xa1)
 193 #define B_NOTIFICATION  (0x20)
 194 #define W_VALUE         (0x0)
 195 #define W_INDEX         (0x2)
 196 #define W_LENGTH        (0x2)
 197
 198 #define B_OVERRUN       (0x1<<6)
 199 #define B_PARITY        (0x1<<5)
 200 #define B_FRAMING       (0x1<<4)
 201 #define B_RING_SIGNAL   (0x1<<3)
 202 #define B_BREAK         (0x1<<2)
 203 #define B_TX_CARRIER    (0x1<<1)
 204 #define B_RX_CARRIER    (0x1<<0)
 205
 206 struct hso_serial_state_notification {
 207         u8 bmRequestType;
 208         u8 bNotification;
 209         u16 wValue;
 210         u16 wIndex;
 211         u16 wLength;
 212         u16 UART_state_bitmap;
 213 } __packed;
 214
 215 struct hso_tiocmget {
 216         struct mutex mutex;
 217         wait_queue_head_t waitq;
 218         int    intr_completed;
 219         struct usb_endpoint_descriptor *endp;
 220         struct urb *urb;
 221         struct hso_serial_state_notification serial_state_notification;
 222         u16    prev_UART_state_bitmap;
 223         struct uart_icount icount;
 224 };
 225
 226
 227 struct hso_serial {
 228         struct hso_device *parent;
 229         int magic;
 230         u8 minor;
 231
 232         struct hso_shared_int *shared_int;
 233
 234         /* rx/tx urb could be either a bulk urb or a control urb depending
 235            on which serial port it is used on. */
 236         struct urb *rx_urb[MAX_RX_URBS];
 237         u8 num_rx_urbs;
 238         u8 *rx_data[MAX_RX_URBS];
 239         u16 rx_data_length;     /* should contain allocated length */
 240
 241         struct urb *tx_urb;
 242         u8 *tx_data;
 243         u8 *tx_buffer;
 244         u16 tx_data_length;     /* should contain allocated length */
 245         u16 tx_data_count;
 246         u16 tx_buffer_count;
 247         struct usb_ctrlrequest ctrl_req_tx;
 248         struct usb_ctrlrequest ctrl_req_rx;
 249
 250         struct usb_endpoint_descriptor *in_endp;
 251         struct usb_endpoint_descriptor *out_endp;
 252
 253         enum rx_ctrl_state rx_state;
 254         u8 rts_state;
 255         u8 dtr_state;
 256         unsigned tx_urb_used:1;
 257
 258         /* from usb_serial_port */
 259         struct tty_struct *tty;
 260         int open_count;
 261         spinlock_t serial_lock;
 262
 263         int (*write_data) (struct hso_serial *serial);
 264         struct hso_tiocmget  *tiocmget;
 265         /* Hacks required to get flow control
 266          * working on the serial receive buffers
 267          * so as not to drop characters on the floor.
 268          */
 269         int  curr_rx_urb_idx;
 270         u16  curr_rx_urb_offset;
 271         u8   rx_urb_filled[MAX_RX_URBS];
 272         struct tasklet_struct unthrottle_tasklet;
 273         struct work_struct    retry_unthrottle_workqueue;
 274 };
 275
 276 struct hso_device {
 277         union {
 278                 struct hso_serial *dev_serial;
 279                 struct hso_net *dev_net;
 280         } port_data;
 281
 282         u32 port_spec;
 283
 284         u8 is_active;
 285         u8 usb_gone;
 286         struct work_struct async_get_intf;
 287         struct work_struct async_put_intf;
 288         struct work_struct reset_device;
 289
 290         struct usb_device *usb;
 291         struct usb_interface *interface;
 292
 293         struct device *dev;
 294         struct kref ref;
 295         struct mutex mutex;
 296 };
 297
 298 /* Type of interface */
 299 #define HSO_INTF_MASK           0xFF00
 300 #define HSO_INTF_MUX            0x0100
 301 #define HSO_INTF_BULK           0x0200
 302
 303 /* Type of port */
 304 #define HSO_PORT_MASK           0xFF
 305 #define HSO_PORT_NO_PORT        0x0
 306 #define HSO_PORT_CONTROL        0x1
 307 #define HSO_PORT_APP            0x2
 308 #define HSO_PORT_GPS            0x3
 309 #define HSO_PORT_PCSC           0x4
 310 #define HSO_PORT_APP2           0x5
 311 #define HSO_PORT_GPS_CONTROL    0x6
 312 #define HSO_PORT_MSD            0x7
 313 #define HSO_PORT_VOICE          0x8
 314 #define HSO_PORT_DIAG2          0x9
 315 #define HSO_PORT_DIAG           0x10
 316 #define HSO_PORT_MODEM          0x11
 317 #define HSO_PORT_NETWORK        0x12
 318
 319 /* Additional device info */
 320 #define HSO_INFO_MASK           0xFF000000
 321 #define HSO_INFO_CRC_BUG        0x01000000
 322
 323 /*****************************************************************************/
 324 /* Prototypes                                                                */
 325 /*****************************************************************************/
 326 /* Serial driver functions */
 327 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
 328                                unsigned int set, unsigned int clear);
 329 static void ctrl_callback(struct urb *urb);
 330 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
 331 static void hso_kick_transmit(struct hso_serial *serial);
 332 /* Helper functions */
 333 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
 334                                    struct usb_device *usb, gfp_t gfp);
 335 static void handle_usb_error(int status, const char *function,
 336                              struct hso_device *hso_dev);
 337 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
 338                                                   int type, int dir);
 339 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
 340 static void hso_free_interface(struct usb_interface *intf);
 341 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
 342 static int hso_stop_serial_device(struct hso_device *hso_dev);
 343 static int hso_start_net_device(struct hso_device *hso_dev);
 344 static void hso_free_shared_int(struct hso_shared_int *shared_int);
 345 static int hso_stop_net_device(struct hso_device *hso_dev);
 346 static void hso_serial_ref_free(struct kref *ref);
 347 static void hso_std_serial_read_bulk_callback(struct urb *urb);
 348 static int hso_mux_serial_read(struct hso_serial *serial);
 349 static void async_get_intf(struct work_struct *data);
 350 static void async_put_intf(struct work_struct *data);
 351 static int hso_put_activity(struct hso_device *hso_dev);
 352 static int hso_get_activity(struct hso_device *hso_dev);
 353 static void tiocmget_intr_callback(struct urb *urb);
 354 static void reset_device(struct work_struct *data);
 355 /*****************************************************************************/
 356 /* Helping functions                                                         */
 357 /*****************************************************************************/
 358
 359 /* #define DEBUG */
 360
 361 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
 362 {
 363         return hso_dev->port_data.dev_net;
 364 }
 365
 366 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
 367 {
 368         return hso_dev->port_data.dev_serial;
 369 }
 370
 371 /* Debugging functions */
 372 #ifdef DEBUG
 373 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
 374                      unsigned int len)
 375 {
 376         static char name[255];
 377
 378         sprintf(name, "hso[%d:%s]", line_count, func_name);
 379         print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
 380 }
 381
 382 #define DUMP(buf_, len_)        \
 383         dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
 384
 385 #define DUMP1(buf_, len_)                       \
 386         do {                                    \
 387                 if (0x01 & debug)               \
 388                         DUMP(buf_, len_);       \
 389         } while (0)
 390 #else
 391 #define DUMP(buf_, len_)
 392 #define DUMP1(buf_, len_)
 393 #endif
 394
 395 /* module parameters */
 396 static int debug;
 397 static int tty_major;
 398 static int disable_net;
 399
 400 /* driver info */
 401 static const char driver_name[] = "hso";
 402 static const char tty_filename[] = "ttyHS";
 403 static const char *version = __FILE__ ": " MOD_AUTHOR;
 404 /* the usb driver itself (registered in hso_init) */
 405 static struct usb_driver hso_driver;
 406 /* serial structures */
 407 static struct tty_driver *tty_drv;
 408 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
 409 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
 410 static spinlock_t serial_table_lock;
 411
 412 static const s32 default_port_spec[] = {
 413         HSO_INTF_MUX | HSO_PORT_NETWORK,
 414         HSO_INTF_BULK | HSO_PORT_DIAG,
 415         HSO_INTF_BULK | HSO_PORT_MODEM,
 416         0
 417 };
 418
 419 static const s32 icon321_port_spec[] = {
 420         HSO_INTF_MUX | HSO_PORT_NETWORK,
 421         HSO_INTF_BULK | HSO_PORT_DIAG2,
 422         HSO_INTF_BULK | HSO_PORT_MODEM,
 423         HSO_INTF_BULK | HSO_PORT_DIAG,
 424         0
 425 };
 426
 427 #define default_port_device(vendor, product)    \
 428         USB_DEVICE(vendor, product),    \
 429                 .driver_info = (kernel_ulong_t)default_port_spec
 430
 431 #define icon321_port_device(vendor, product)    \
 432         USB_DEVICE(vendor, product),    \
 433                 .driver_info = (kernel_ulong_t)icon321_port_spec
 434
 435 /* list of devices we support */
 436 static const struct usb_device_id hso_ids[] = {
 437         {default_port_device(0x0af0, 0x6711)},
 438         {default_port_device(0x0af0, 0x6731)},
 439         {default_port_device(0x0af0, 0x6751)},
 440         {default_port_device(0x0af0, 0x6771)},
 441         {default_port_device(0x0af0, 0x6791)},
 442         {default_port_device(0x0af0, 0x6811)},
 443         {default_port_device(0x0af0, 0x6911)},
 444         {default_port_device(0x0af0, 0x6951)},
 445         {default_port_device(0x0af0, 0x6971)},
 446         {default_port_device(0x0af0, 0x7011)},
 447         {default_port_device(0x0af0, 0x7031)},
 448         {default_port_device(0x0af0, 0x7051)},
 449         {default_port_device(0x0af0, 0x7071)},
 450         {default_port_device(0x0af0, 0x7111)},
 451         {default_port_device(0x0af0, 0x7211)},
 452         {default_port_device(0x0af0, 0x7251)},
 453         {default_port_device(0x0af0, 0x7271)},
 454         {default_port_device(0x0af0, 0x7311)},
 455         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
 456         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
 457         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
 458         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
 459         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
 460         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
 461         {USB_DEVICE(0x0af0, 0x7381)},           /* GE40x */
 462         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
 463         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
 464         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
 465         {USB_DEVICE(0x0af0, 0x7701)},
 466         {USB_DEVICE(0x0af0, 0x7706)},
 467         {USB_DEVICE(0x0af0, 0x7801)},
 468         {USB_DEVICE(0x0af0, 0x7901)},
 469         {USB_DEVICE(0x0af0, 0x7A01)},
 470         {USB_DEVICE(0x0af0, 0x7A05)},
 471         {USB_DEVICE(0x0af0, 0x8200)},
 472         {USB_DEVICE(0x0af0, 0x8201)},
 473         {USB_DEVICE(0x0af0, 0x8300)},
 474         {USB_DEVICE(0x0af0, 0x8302)},
 475         {USB_DEVICE(0x0af0, 0x8304)},
 476         {USB_DEVICE(0x0af0, 0x8400)},
 477         {USB_DEVICE(0x0af0, 0x8600)},
 478         {USB_DEVICE(0x0af0, 0x8800)},
 479         {USB_DEVICE(0x0af0, 0x8900)},
 480         {USB_DEVICE(0x0af0, 0xd035)},
 481         {USB_DEVICE(0x0af0, 0xd055)},
 482         {USB_DEVICE(0x0af0, 0xd155)},
 483         {USB_DEVICE(0x0af0, 0xd255)},
 484         {USB_DEVICE(0x0af0, 0xd057)},
 485         {USB_DEVICE(0x0af0, 0xd157)},
 486         {USB_DEVICE(0x0af0, 0xd257)},
 487         {USB_DEVICE(0x0af0, 0xd357)},
 488         {USB_DEVICE(0x0af0, 0xd058)},
 489         {USB_DEVICE(0x0af0, 0xc100)},
 490         {}
 491 };
 492 MODULE_DEVICE_TABLE(usb, hso_ids);
 493
 494 /* Sysfs attribute */
 495 static ssize_t hso_sysfs_show_porttype(struct device *dev,
 496                                        struct device_attribute *attr,
 497                                        char *buf)
 498 {
 499         struct hso_device *hso_dev = dev_get_drvdata(dev);
 500         char *port_name;
 501
 502         if (!hso_dev)
 503                 return 0;
 504
 505         switch (hso_dev->port_spec & HSO_PORT_MASK) {
 506         case HSO_PORT_CONTROL:
 507                 port_name = "Control";
 508                 break;
 509         case HSO_PORT_APP:
 510                 port_name = "Application";
 511                 break;
 512         case HSO_PORT_APP2:
 513                 port_name = "Application2";
 514                 break;
 515         case HSO_PORT_GPS:
 516                 port_name = "GPS";
 517                 break;
 518         case HSO_PORT_GPS_CONTROL:
 519                 port_name = "GPS Control";
 520                 break;
 521         case HSO_PORT_PCSC:
 522                 port_name = "PCSC";
 523                 break;
 524         case HSO_PORT_DIAG:
 525                 port_name = "Diagnostic";
 526                 break;
 527         case HSO_PORT_DIAG2:
 528                 port_name = "Diagnostic2";
 529                 break;
 530         case HSO_PORT_MODEM:
 531                 port_name = "Modem";
 532                 break;
 533         case HSO_PORT_NETWORK:
 534                 port_name = "Network";
 535                 break;
 536         default:
 537                 port_name = "Unknown";
 538                 break;
 539         }
 540
 541         return sprintf(buf, "%s\n", port_name);
 542 }
 543 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
 544
 545 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
 546 {
 547         int idx;
 548
 549         for (idx = 0; idx < serial->num_rx_urbs; idx++)
 550                 if (serial->rx_urb[idx] == urb)
 551                         return idx;
 552         dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
 553         return -1;
 554 }
 555
 556 /* converts mux value to a port spec value */
 557 static u32 hso_mux_to_port(int mux)
 558 {
 559         u32 result;
 560
 561         switch (mux) {
 562         case 0x1:
 563                 result = HSO_PORT_CONTROL;
 564                 break;
 565         case 0x2:
 566                 result = HSO_PORT_APP;
 567                 break;
 568         case 0x4:
 569                 result = HSO_PORT_PCSC;
 570                 break;
 571         case 0x8:
 572                 result = HSO_PORT_GPS;
 573                 break;
 574         case 0x10:
 575                 result = HSO_PORT_APP2;
 576                 break;
 577         default:
 578                 result = HSO_PORT_NO_PORT;
 579         }
 580         return result;
 581 }
 582
 583 /* converts port spec value to a mux value */
 584 static u32 hso_port_to_mux(int port)
 585 {
 586         u32 result;
 587
 588         switch (port & HSO_PORT_MASK) {
 589         case HSO_PORT_CONTROL:
 590                 result = 0x0;
 591                 break;
 592         case HSO_PORT_APP:
 593                 result = 0x1;
 594                 break;
 595         case HSO_PORT_PCSC:
 596                 result = 0x2;
 597                 break;
 598         case HSO_PORT_GPS:
 599                 result = 0x3;
 600                 break;
 601         case HSO_PORT_APP2:
 602                 result = 0x4;
 603                 break;
 604         default:
 605                 result = 0x0;
 606         }
 607         return result;
 608 }
 609
 610 static struct hso_serial *get_serial_by_shared_int_and_type(
 611                                         struct hso_shared_int *shared_int,
 612                                         int mux)
 613 {
 614         int i, port;
 615
 616         port = hso_mux_to_port(mux);
 617
 618         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
 619                 if (serial_table[i] &&
 620                     (dev2ser(serial_table[i])->shared_int == shared_int) &&
 621                     ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
 622                         return dev2ser(serial_table[i]);
 623                 }
 624         }
 625
 626         return NULL;
 627 }
 628
 629 static struct hso_serial *get_serial_by_index(unsigned index)
 630 {
 631         struct hso_serial *serial = NULL;
 632         unsigned long flags;
 633
 634         spin_lock_irqsave(&serial_table_lock, flags);
 635         if (serial_table[index])
 636                 serial = dev2ser(serial_table[index]);
 637         spin_unlock_irqrestore(&serial_table_lock, flags);
 638
 639         return serial;
 640 }
 641
 642 static int get_free_serial_index(void)
 643 {
 644         int index;
 645         unsigned long flags;
 646
 647         spin_lock_irqsave(&serial_table_lock, flags);
 648         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
 649                 if (serial_table[index] == NULL) {
 650                         spin_unlock_irqrestore(&serial_table_lock, flags);
 651                         return index;
 652                 }
 653         }
 654         spin_unlock_irqrestore(&serial_table_lock, flags);
 655
 656         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
 657         return -1;
 658 }
 659
 660 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
 661 {
 662         unsigned long flags;
 663
 664         spin_lock_irqsave(&serial_table_lock, flags);
 665         if (serial)
 666                 serial_table[index] = serial->parent;
 667         else
 668                 serial_table[index] = NULL;
 669         spin_unlock_irqrestore(&serial_table_lock, flags);
 670 }
 671
 672 static void handle_usb_error(int status, const char *function,
 673                              struct hso_device *hso_dev)
 674 {
 675         char *explanation;
 676
 677         switch (status) {
 678         case -ENODEV:
 679                 explanation = "no device";
 680                 break;
 681         case -ENOENT:
 682                 explanation = "endpoint not enabled";
 683                 break;
 684         case -EPIPE:
 685                 explanation = "endpoint stalled";
 686                 break;
 687         case -ENOSPC:
 688                 explanation = "not enough bandwidth";
 689                 break;
 690         case -ESHUTDOWN:
 691                 explanation = "device disabled";
 692                 break;
 693         case -EHOSTUNREACH:
 694                 explanation = "device suspended";
 695                 break;
 696         case -EINVAL:
 697         case -EAGAIN:
 698         case -EFBIG:
 699         case -EMSGSIZE:
 700                 explanation = "internal error";
 701                 break;
 702         case -EILSEQ:
 703         case -EPROTO:
 704         case -ETIME:
 705         case -ETIMEDOUT:
 706                 explanation = "protocol error";
 707                 if (hso_dev)
 708                         schedule_work(&hso_dev->reset_device);
 709                 break;
 710         default:
 711                 explanation = "unknown status";
 712                 break;
 713         }
 714
 715         /* log a meaningful explanation of an USB status */
 716         D1("%s: received USB status - %s (%d)", function, explanation, status);
 717 }
 718
 719 /* Network interface functions */
 720
 721 /* called when net interface is brought up by ifconfig */
 722 static int hso_net_open(struct net_device *net)
 723 {
 724         struct hso_net *odev = netdev_priv(net);
 725         unsigned long flags = 0;
 726
 727         if (!odev) {
 728                 dev_err(&net->dev, "No net device !\n");
 729                 return -ENODEV;
 730         }
 731
 732         odev->skb_tx_buf = NULL;
 733
 734         /* setup environment */
 735         spin_lock_irqsave(&odev->net_lock, flags);
 736         odev->rx_parse_state = WAIT_IP;
 737         odev->rx_buf_size = 0;
 738         odev->rx_buf_missing = sizeof(struct iphdr);
 739         spin_unlock_irqrestore(&odev->net_lock, flags);
 740
 741         /* We are up and running. */
 742         set_bit(HSO_NET_RUNNING, &odev->flags);
 743         hso_start_net_device(odev->parent);
 744
 745         /* Tell the kernel we are ready to start receiving from it */
 746         netif_start_queue(net);
 747
 748         return 0;
 749 }
 750
 751 /* called when interface is brought down by ifconfig */
 752 static int hso_net_close(struct net_device *net)
 753 {
 754         struct hso_net *odev = netdev_priv(net);
 755
 756         /* we don't need the queue anymore */
 757         netif_stop_queue(net);
 758         /* no longer running */
 759         clear_bit(HSO_NET_RUNNING, &odev->flags);
 760
 761         hso_stop_net_device(odev->parent);
 762
 763         /* done */
 764         return 0;
 765 }
 766
 767 /* USB tells is xmit done, we should start the netqueue again */
 768 static void write_bulk_callback(struct urb *urb)
 769 {
 770         struct hso_net *odev = urb->context;
 771         int status = urb->status;
 772
 773         /* Sanity check */
 774         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 775                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
 776                 return;
 777         }
 778
 779         /* Do we still have a valid kernel network device? */
 780         if (!netif_device_present(odev->net)) {
 781                 dev_err(&urb->dev->dev, "%s: net device not present\n",
 782                         __func__);
 783                 return;
 784         }
 785
 786         /* log status, but don't act on it, we don't need to resubmit anything
 787          * anyhow */
 788         if (status)
 789                 handle_usb_error(status, __func__, odev->parent);
 790
 791         hso_put_activity(odev->parent);
 792
 793         /* Tell the network interface we are ready for another frame */
 794         netif_wake_queue(odev->net);
 795 }
 796
 797 /* called by kernel when we need to transmit a packet */
 798 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
 799                                             struct net_device *net)
 800 {
 801         struct hso_net *odev = netdev_priv(net);
 802         int result;
 803
 804         /* Tell the kernel, "No more frames 'til we are done with this one." */
 805         netif_stop_queue(net);
 806         if (hso_get_activity(odev->parent) == -EAGAIN) {
 807                 odev->skb_tx_buf = skb;
 808                 return NETDEV_TX_OK;
 809         }
 810
 811         /* log if asked */
 812         DUMP1(skb->data, skb->len);
 813         /* Copy it from kernel memory to OUR memory */
 814         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
 815         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
 816
 817         /* Fill in the URB for shipping it out. */
 818         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
 819                           odev->parent->usb,
 820                           usb_sndbulkpipe(odev->parent->usb,
 821                                           odev->out_endp->
 822                                           bEndpointAddress & 0x7F),
 823                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
 824                           odev);
 825
 826         /* Deal with the Zero Length packet problem, I hope */
 827         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
 828
 829         /* Send the URB on its merry way. */
 830         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
 831         if (result) {
 832                 dev_warn(&odev->parent->interface->dev,
 833                         "failed mux_bulk_tx_urb %d\n", result);
 834                 net->stats.tx_errors++;
 835                 netif_start_queue(net);
 836         } else {
 837                 net->stats.tx_packets++;
 838                 net->stats.tx_bytes += skb->len;
 839         }
 840         dev_kfree_skb(skb);
 841         /* we're done */
 842         return NETDEV_TX_OK;
 843 }
 844
 845 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
 846 {
 847         struct hso_net *odev = netdev_priv(net);
 848
 849         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 850         usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
 851 }
 852
 853 static const struct ethtool_ops ops = {
 854         .get_drvinfo = hso_get_drvinfo,
 855         .get_link = ethtool_op_get_link
 856 };
 857
 858 /* called when a packet did not ack after watchdogtimeout */
 859 static void hso_net_tx_timeout(struct net_device *net)
 860 {
 861         struct hso_net *odev = netdev_priv(net);
 862
 863         if (!odev)
 864                 return;
 865
 866         /* Tell syslog we are hosed. */
 867         dev_warn(&net->dev, "Tx timed out.\n");
 868
 869         /* Tear the waiting frame off the list */
 870         if (odev->mux_bulk_tx_urb &&
 871             (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 872                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 873
 874         /* Update statistics */
 875         net->stats.tx_errors++;
 876 }
 877
 878 /* make a real packet from the received USB buffer */
 879 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 880                         unsigned int count, unsigned char is_eop)
 881 {
 882         unsigned short temp_bytes;
 883         unsigned short buffer_offset = 0;
 884         unsigned short frame_len;
 885         unsigned char *tmp_rx_buf;
 886
 887         /* log if needed */
 888         D1("Rx %d bytes", count);
 889         DUMP(ip_pkt, min(128, (int)count));
 890
 891         while (count) {
 892                 switch (odev->rx_parse_state) {
 893                 case WAIT_IP:
 894                         /* waiting for IP header. */
 895                         /* wanted bytes - size of ip header */
 896                         temp_bytes =
 897                             (count <
 898                              odev->rx_buf_missing) ? count : odev->
 899                             rx_buf_missing;
 900
 901                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 902                                odev->rx_buf_size, ip_pkt + buffer_offset,
 903                                temp_bytes);
 904
 905                         odev->rx_buf_size += temp_bytes;
 906                         buffer_offset += temp_bytes;
 907                         odev->rx_buf_missing -= temp_bytes;
 908                         count -= temp_bytes;
 909
 910                         if (!odev->rx_buf_missing) {
 911                                 /* header is complete allocate an sk_buffer and
 912                                  * continue to WAIT_DATA */
 913                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 914
 915                                 if ((frame_len > DEFAULT_MRU) ||
 916                                     (frame_len < sizeof(struct iphdr))) {
 917                                         dev_err(&odev->net->dev,
 918                                                 "Invalid frame (%d) length\n",
 919                                                 frame_len);
 920                                         odev->rx_parse_state = WAIT_SYNC;
 921                                         continue;
 922                                 }
 923                                 /* Allocate an sk_buff */
 924                                 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
 925                                                                     frame_len);
 926                                 if (!odev->skb_rx_buf) {
 927                                         /* We got no receive buffer. */
 928                                         D1("could not allocate memory");
 929                                         odev->rx_parse_state = WAIT_SYNC;
 930                                         return;
 931                                 }
 932
 933                                 /* Copy what we got so far. make room for iphdr
 934                                  * after tail. */
 935                                 tmp_rx_buf =
 936                                     skb_put(odev->skb_rx_buf,
 937                                             sizeof(struct iphdr));
 938                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 939                                        sizeof(struct iphdr));
 940
 941                                 /* ETH_HLEN */
 942                                 odev->rx_buf_size = sizeof(struct iphdr);
 943
 944                                 /* Filip actually use .tot_len */
 945                                 odev->rx_buf_missing =
 946                                     frame_len - sizeof(struct iphdr);
 947                                 odev->rx_parse_state = WAIT_DATA;
 948                         }
 949                         break;
 950
 951                 case WAIT_DATA:
 952                         temp_bytes = (count < odev->rx_buf_missing)
 953                                         ? count : odev->rx_buf_missing;
 954
 955                         /* Copy the rest of the bytes that are left in the
 956                          * buffer into the waiting sk_buf. */
 957                         /* Make room for temp_bytes after tail. */
 958                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 959                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 960
 961                         odev->rx_buf_missing -= temp_bytes;
 962                         count -= temp_bytes;
 963                         buffer_offset += temp_bytes;
 964                         odev->rx_buf_size += temp_bytes;
 965                         if (!odev->rx_buf_missing) {
 966                                 /* Packet is complete. Inject into stack. */
 967                                 /* We have IP packet here */
 968                                 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
 969                                 /* don't check it */
 970                                 odev->skb_rx_buf->ip_summed =
 971                                         CHECKSUM_UNNECESSARY;
 972
 973                                 skb_reset_mac_header(odev->skb_rx_buf);
 974
 975                                 /* Ship it off to the kernel */
 976                                 netif_rx(odev->skb_rx_buf);
 977                                 /* No longer our buffer. */
 978                                 odev->skb_rx_buf = NULL;
 979
 980                                 /* update out statistics */
 981                                 odev->net->stats.rx_packets++;
 982
 983                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 984
 985                                 odev->rx_buf_size = 0;
 986                                 odev->rx_buf_missing = sizeof(struct iphdr);
 987                                 odev->rx_parse_state = WAIT_IP;
 988                         }
 989                         break;
 990
 991                 case WAIT_SYNC:
 992                         D1(" W_S");
 993                         count = 0;
 994                         break;
 995                 default:
 996                         D1(" ");
 997                         count--;
 998                         break;
 999                 }
1000         }
1001
1002         /* Recovery mechanism for WAIT_SYNC state. */
1003         if (is_eop) {
1004                 if (odev->rx_parse_state == WAIT_SYNC) {
1005                         odev->rx_parse_state = WAIT_IP;
1006                         odev->rx_buf_size = 0;
1007                         odev->rx_buf_missing = sizeof(struct iphdr);
1008                 }
1009         }
1010 }
1011
1012 /* Moving data from usb to kernel (in interrupt state) */
1013 static void read_bulk_callback(struct urb *urb)
1014 {
1015         struct hso_net *odev = urb->context;
1016         struct net_device *net;
1017         int result;
1018         int status = urb->status;
1019
1020         /* is al ok?  (Filip: Who's Al ?) */
1021         if (status) {
1022                 handle_usb_error(status, __func__, odev->parent);
1023                 return;
1024         }
1025
1026         /* Sanity check */
1027         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1028                 D1("BULK IN callback but driver is not active!");
1029                 return;
1030         }
1031         usb_mark_last_busy(urb->dev);
1032
1033         net = odev->net;
1034
1035         if (!netif_device_present(net)) {
1036                 /* Somebody killed our network interface... */
1037                 return;
1038         }
1039
1040         if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1041                 u32 rest;
1042                 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1043                 rest = urb->actual_length %
1044                         le16_to_cpu(odev->in_endp->wMaxPacketSize);
1045                 if (((rest == 5) || (rest == 6)) &&
1046                     !memcmp(((u8 *) urb->transfer_buffer) +
1047                             urb->actual_length - 4, crc_check, 4)) {
1048                         urb->actual_length -= 4;
1049                 }
1050         }
1051
1052         /* do we even have a packet? */
1053         if (urb->actual_length) {
1054                 /* Handle the IP stream, add header and push it onto network
1055                  * stack if the packet is complete. */
1056                 spin_lock(&odev->net_lock);
1057                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1058                             (urb->transfer_buffer_length >
1059                              urb->actual_length) ? 1 : 0);
1060                 spin_unlock(&odev->net_lock);
1061         }
1062
1063         /* We are done with this URB, resubmit it. Prep the USB to wait for
1064          * another frame. Reuse same as received. */
1065         usb_fill_bulk_urb(urb,
1066                           odev->parent->usb,
1067                           usb_rcvbulkpipe(odev->parent->usb,
1068                                           odev->in_endp->
1069                                           bEndpointAddress & 0x7F),
1070                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1071                           read_bulk_callback, odev);
1072
1073         /* Give this to the USB subsystem so it can tell us when more data
1074          * arrives. */
1075         result = usb_submit_urb(urb, GFP_ATOMIC);
1076         if (result)
1077                 dev_warn(&odev->parent->interface->dev,
1078                          "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1079                          result);
1080 }
1081
1082 /* Serial driver functions */
1083
1084 static void hso_init_termios(struct ktermios *termios)
1085 {
1086         /*
1087          * The default requirements for this device are:
1088          */
1089         termios->c_iflag &=
1090                 ~(IGNBRK        /* disable ignore break */
1091                 | BRKINT        /* disable break causes interrupt */
1092                 | PARMRK        /* disable mark parity errors */
1093                 | ISTRIP        /* disable clear high bit of input characters */
1094                 | INLCR         /* disable translate NL to CR */
1095                 | IGNCR         /* disable ignore CR */
1096                 | ICRNL         /* disable translate CR to NL */
1097                 | IXON);        /* disable enable XON/XOFF flow control */
1098
1099         /* disable postprocess output characters */
1100         termios->c_oflag &= ~OPOST;
1101
1102         termios->c_lflag &=
1103                 ~(ECHO          /* disable echo input characters */
1104                 | ECHONL        /* disable echo new line */
1105                 | ICANON        /* disable erase, kill, werase, and rprnt
1106                                    special characters */
1107                 | ISIG          /* disable interrupt, quit, and suspend special
1108                                    characters */
1109                 | IEXTEN);      /* disable non-POSIX special characters */
1110
1111         termios->c_cflag &=
1112                 ~(CSIZE         /* no size */
1113                 | PARENB        /* disable parity bit */
1114                 | CBAUD         /* clear current baud rate */
1115                 | CBAUDEX);     /* clear current buad rate */
1116
1117         termios->c_cflag |= CS8;        /* character size 8 bits */
1118
1119         /* baud rate 115200 */
1120         tty_termios_encode_baud_rate(termios, 115200, 115200);
1121 }
1122
1123 static void _hso_serial_set_termios(struct tty_struct *tty,
1124                                     struct ktermios *old)
1125 {
1126         struct hso_serial *serial = get_serial_by_tty(tty);
1127         struct ktermios *termios;
1128
1129         if (!serial) {
1130                 printk(KERN_ERR "%s: no tty structures", __func__);
1131                 return;
1132         }
1133
1134         D4("port %d", serial->minor);
1135
1136         /*
1137          *      Fix up unsupported bits
1138          */
1139         termios = tty->termios;
1140         termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1141
1142         termios->c_cflag &=
1143                 ~(CSIZE         /* no size */
1144                 | PARENB        /* disable parity bit */
1145                 | CBAUD         /* clear current baud rate */
1146                 | CBAUDEX);     /* clear current buad rate */
1147
1148         termios->c_cflag |= CS8;        /* character size 8 bits */
1149
1150         /* baud rate 115200 */
1151         tty_encode_baud_rate(tty, 115200, 115200);
1152 }
1153
1154 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1155 {
1156         int result;
1157         /* We are done with this URB, resubmit it. Prep the USB to wait for
1158          * another frame */
1159         usb_fill_bulk_urb(urb, serial->parent->usb,
1160                           usb_rcvbulkpipe(serial->parent->usb,
1161                                           serial->in_endp->
1162                                           bEndpointAddress & 0x7F),
1163                           urb->transfer_buffer, serial->rx_data_length,
1164                           hso_std_serial_read_bulk_callback, serial);
1165         /* Give this to the USB subsystem so it can tell us when more data
1166          * arrives. */
1167         result = usb_submit_urb(urb, GFP_ATOMIC);
1168         if (result) {
1169                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1170                         __func__, result);
1171         }
1172 }
1173
1174
1175
1176
1177 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1178 {
1179         int count;
1180         struct urb *curr_urb;
1181
1182         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1183                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1184                 count = put_rxbuf_data(curr_urb, serial);
1185                 if (count == -1)
1186                         return;
1187                 if (count == 0) {
1188                         serial->curr_rx_urb_idx++;
1189                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1190                                 serial->curr_rx_urb_idx = 0;
1191                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1192                 }
1193         }
1194 }
1195
1196 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1197 {
1198         int count = 0;
1199         struct urb *urb;
1200
1201         urb = serial->rx_urb[0];
1202         if (serial->open_count > 0) {
1203                 count = put_rxbuf_data(urb, serial);
1204                 if (count == -1)
1205                         return;
1206         }
1207         /* Re issue a read as long as we receive data. */
1208
1209         if (count == 0 && ((urb->actual_length != 0) ||
1210                            (serial->rx_state == RX_PENDING))) {
1211                 serial->rx_state = RX_SENT;
1212                 hso_mux_serial_read(serial);
1213         } else
1214                 serial->rx_state = RX_IDLE;
1215 }
1216
1217
1218 /* read callback for Diag and CS port */
1219 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1220 {
1221         struct hso_serial *serial = urb->context;
1222         int status = urb->status;
1223
1224         /* sanity check */
1225         if (!serial) {
1226                 D1("serial == NULL");
1227                 return;
1228         } else if (status) {
1229                 handle_usb_error(status, __func__, serial->parent);
1230                 return;
1231         }
1232
1233         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1234         D1("Actual length = %d\n", urb->actual_length);
1235         DUMP1(urb->transfer_buffer, urb->actual_length);
1236
1237         /* Anyone listening? */
1238         if (serial->open_count == 0)
1239                 return;
1240
1241         if (status == 0) {
1242                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1243                         u32 rest;
1244                         u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1245                         rest =
1246                             urb->actual_length %
1247                             le16_to_cpu(serial->in_endp->wMaxPacketSize);
1248                         if (((rest == 5) || (rest == 6)) &&
1249                             !memcmp(((u8 *) urb->transfer_buffer) +
1250                                     urb->actual_length - 4, crc_check, 4)) {
1251                                 urb->actual_length -= 4;
1252                         }
1253                 }
1254                 /* Valid data, handle RX data */
1255                 spin_lock(&serial->serial_lock);
1256                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1257                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1258                 spin_unlock(&serial->serial_lock);
1259         } else if (status == -ENOENT || status == -ECONNRESET) {
1260                 /* Unlinked - check for throttled port. */
1261                 D2("Port %d, successfully unlinked urb", serial->minor);
1262                 spin_lock(&serial->serial_lock);
1263                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1264                 hso_resubmit_rx_bulk_urb(serial, urb);
1265                 spin_unlock(&serial->serial_lock);
1266         } else {
1267                 D2("Port %d, status = %d for read urb", serial->minor, status);
1268                 return;
1269         }
1270 }
1271
1272 /*
1273  * This needs to be a tasklet otherwise we will
1274  * end up recursively calling this function.
1275  */
1276 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1277 {
1278         unsigned long flags;
1279
1280         spin_lock_irqsave(&serial->serial_lock, flags);
1281         if ((serial->parent->port_spec & HSO_INTF_MUX))
1282                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1283         else
1284                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1285         spin_unlock_irqrestore(&serial->serial_lock, flags);
1286 }
1287
1288 static  void hso_unthrottle(struct tty_struct *tty)
1289 {
1290         struct hso_serial *serial = get_serial_by_tty(tty);
1291
1292         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1293 }
1294
1295 static void hso_unthrottle_workfunc(struct work_struct *work)
1296 {
1297         struct hso_serial *serial =
1298             container_of(work, struct hso_serial,
1299                          retry_unthrottle_workqueue);
1300         hso_unthrottle_tasklet(serial);
1301 }
1302
1303 /* open the requested serial port */
1304 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1305 {
1306         struct hso_serial *serial = get_serial_by_index(tty->index);
1307         int result;
1308
1309         /* sanity check */
1310         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1311                 WARN_ON(1);
1312                 tty->driver_data = NULL;
1313                 D1("Failed to open port");
1314                 return -ENODEV;
1315         }
1316
1317         mutex_lock(&serial->parent->mutex);
1318         result = usb_autopm_get_interface(serial->parent->interface);
1319         if (result < 0)
1320                 goto err_out;
1321
1322         D1("Opening %d", serial->minor);
1323         kref_get(&serial->parent->ref);
1324
1325         /* setup */
1326         spin_lock_irq(&serial->serial_lock);
1327         tty->driver_data = serial;
1328         tty_kref_put(serial->tty);
1329         serial->tty = tty_kref_get(tty);
1330         spin_unlock_irq(&serial->serial_lock);
1331
1332         /* check for port already opened, if not set the termios */
1333         serial->open_count++;
1334         if (serial->open_count == 1) {
1335                 serial->rx_state = RX_IDLE;
1336                 /* Force default termio settings */
1337                 _hso_serial_set_termios(tty, NULL);
1338                 tasklet_init(&serial->unthrottle_tasklet,
1339                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1340                              (unsigned long)serial);
1341                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1342                           hso_unthrottle_workfunc);
1343                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1344                 if (result) {
1345                         hso_stop_serial_device(serial->parent);
1346                         serial->open_count--;
1347                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1348                 }
1349         } else {
1350                 D1("Port was already open");
1351         }
1352
1353         usb_autopm_put_interface(serial->parent->interface);
1354
1355         /* done */
1356         if (result)
1357                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1358 err_out:
1359         mutex_unlock(&serial->parent->mutex);
1360         return result;
1361 }
1362
1363 /* close the requested serial port */
1364 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1365 {
1366         struct hso_serial *serial = tty->driver_data;
1367         u8 usb_gone;
1368
1369         D1("Closing serial port");
1370
1371         /* Open failed, no close cleanup required */
1372         if (serial == NULL)
1373                 return;
1374
1375         mutex_lock(&serial->parent->mutex);
1376         usb_gone = serial->parent->usb_gone;
1377
1378         if (!usb_gone)
1379                 usb_autopm_get_interface(serial->parent->interface);
1380
1381         /* reset the rts and dtr */
1382         /* do the actual close */
1383         serial->open_count--;
1384
1385         if (serial->open_count <= 0) {
1386                 serial->open_count = 0;
1387                 spin_lock_irq(&serial->serial_lock);
1388                 if (serial->tty == tty) {
1389                         serial->tty->driver_data = NULL;
1390                         serial->tty = NULL;
1391                         tty_kref_put(tty);
1392                 }
1393                 spin_unlock_irq(&serial->serial_lock);
1394                 if (!usb_gone)
1395                         hso_stop_serial_device(serial->parent);
1396                 tasklet_kill(&serial->unthrottle_tasklet);
1397                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1398         }
1399
1400         if (!usb_gone)
1401                 usb_autopm_put_interface(serial->parent->interface);
1402
1403         mutex_unlock(&serial->parent->mutex);
1404
1405         kref_put(&serial->parent->ref, hso_serial_ref_free);
1406 }
1407
1408 /* close the requested serial port */
1409 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1410                             int count)
1411 {
1412         struct hso_serial *serial = get_serial_by_tty(tty);
1413         int space, tx_bytes;
1414         unsigned long flags;
1415
1416         /* sanity check */
1417         if (serial == NULL) {
1418                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1419                 return -ENODEV;
1420         }
1421
1422         spin_lock_irqsave(&serial->serial_lock, flags);
1423
1424         space = serial->tx_data_length - serial->tx_buffer_count;
1425         tx_bytes = (count < space) ? count : space;
1426
1427         if (!tx_bytes)
1428                 goto out;
1429
1430         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1431         serial->tx_buffer_count += tx_bytes;
1432
1433 out:
1434         spin_unlock_irqrestore(&serial->serial_lock, flags);
1435
1436         hso_kick_transmit(serial);
1437         /* done */
1438         return tx_bytes;
1439 }
1440
1441 /* how much room is there for writing */
1442 static int hso_serial_write_room(struct tty_struct *tty)
1443 {
1444         struct hso_serial *serial = get_serial_by_tty(tty);
1445         int room;
1446         unsigned long flags;
1447
1448         spin_lock_irqsave(&serial->serial_lock, flags);
1449         room = serial->tx_data_length - serial->tx_buffer_count;
1450         spin_unlock_irqrestore(&serial->serial_lock, flags);
1451
1452         /* return free room */
1453         return room;
1454 }
1455
1456 /* setup the term */
1457 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1458 {
1459         struct hso_serial *serial = get_serial_by_tty(tty);
1460         unsigned long flags;
1461
1462         if (old)
1463                 D5("Termios called with: cflags new[%d] - old[%d]",
1464                    tty->termios->c_cflag, old->c_cflag);
1465
1466         /* the actual setup */
1467         spin_lock_irqsave(&serial->serial_lock, flags);
1468         if (serial->open_count)
1469                 _hso_serial_set_termios(tty, old);
1470         else
1471                 tty->termios = old;
1472         spin_unlock_irqrestore(&serial->serial_lock, flags);
1473
1474         /* done */
1475 }
1476
1477 /* how many characters in the buffer */
1478 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1479 {
1480         struct hso_serial *serial = get_serial_by_tty(tty);
1481         int chars;
1482         unsigned long flags;
1483
1484         /* sanity check */
1485         if (serial == NULL)
1486                 return 0;
1487
1488         spin_lock_irqsave(&serial->serial_lock, flags);
1489         chars = serial->tx_buffer_count;
1490         spin_unlock_irqrestore(&serial->serial_lock, flags);
1491
1492         return chars;
1493 }
1494 static int tiocmget_submit_urb(struct hso_serial *serial,
1495                                struct hso_tiocmget *tiocmget,
1496                                struct usb_device *usb)
1497 {
1498         int result;
1499
1500         if (serial->parent->usb_gone)
1501                 return -ENODEV;
1502         usb_fill_int_urb(tiocmget->urb, usb,
1503                          usb_rcvintpipe(usb,
1504                                         tiocmget->endp->
1505                                         bEndpointAddress & 0x7F),
1506                          &tiocmget->serial_state_notification,
1507                          sizeof(struct hso_serial_state_notification),
1508                          tiocmget_intr_callback, serial,
1509                          tiocmget->endp->bInterval);
1510         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1511         if (result) {
1512                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1513                          result);
1514         }
1515         return result;
1516
1517 }
1518
1519 static void tiocmget_intr_callback(struct urb *urb)
1520 {
1521         struct hso_serial *serial = urb->context;
1522         struct hso_tiocmget *tiocmget;
1523         int status = urb->status;
1524         u16 UART_state_bitmap, prev_UART_state_bitmap;
1525         struct uart_icount *icount;
1526         struct hso_serial_state_notification *serial_state_notification;
1527         struct usb_device *usb;
1528
1529         /* Sanity checks */
1530         if (!serial)
1531                 return;
1532         if (status) {
1533                 handle_usb_error(status, __func__, serial->parent);
1534                 return;
1535         }
1536         tiocmget = serial->tiocmget;
1537         if (!tiocmget)
1538                 return;
1539         usb = serial->parent->usb;
1540         serial_state_notification = &tiocmget->serial_state_notification;
1541         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1542             serial_state_notification->bNotification != B_NOTIFICATION ||
1543             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1544             le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1545             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1546                 dev_warn(&usb->dev,
1547                          "hso received invalid serial state notification\n");
1548                 DUMP(serial_state_notification,
1549                      sizeof(struct hso_serial_state_notification));
1550         } else {
1551
1552                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1553                                                 UART_state_bitmap);
1554                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1555                 icount = &tiocmget->icount;
1556                 spin_lock(&serial->serial_lock);
1557                 if ((UART_state_bitmap & B_OVERRUN) !=
1558                    (prev_UART_state_bitmap & B_OVERRUN))
1559                         icount->parity++;
1560                 if ((UART_state_bitmap & B_PARITY) !=
1561                    (prev_UART_state_bitmap & B_PARITY))
1562                         icount->parity++;
1563                 if ((UART_state_bitmap & B_FRAMING) !=
1564                    (prev_UART_state_bitmap & B_FRAMING))
1565                         icount->frame++;
1566                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1567                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1568                         icount->rng++;
1569                 if ((UART_state_bitmap & B_BREAK) !=
1570                    (prev_UART_state_bitmap & B_BREAK))
1571                         icount->brk++;
1572                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1573                    (prev_UART_state_bitmap & B_TX_CARRIER))
1574                         icount->dsr++;
1575                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1576                    (prev_UART_state_bitmap & B_RX_CARRIER))
1577                         icount->dcd++;
1578                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1579                 spin_unlock(&serial->serial_lock);
1580                 tiocmget->intr_completed = 1;
1581                 wake_up_interruptible(&tiocmget->waitq);
1582         }
1583         memset(serial_state_notification, 0,
1584                sizeof(struct hso_serial_state_notification));
1585         tiocmget_submit_urb(serial,
1586                             tiocmget,
1587                             serial->parent->usb);
1588 }
1589
1590 /*
1591  * next few functions largely stolen from drivers/serial/serial_core.c
1592  */
1593 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1594  * - mask passed in arg for lines of interest
1595  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1596  * Caller should use TIOCGICOUNT to see which one it was
1597  */
1598 static int
1599 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1600 {
1601         DECLARE_WAITQUEUE(wait, current);
1602         struct uart_icount cprev, cnow;
1603         struct hso_tiocmget  *tiocmget;
1604         int ret;
1605
1606         tiocmget = serial->tiocmget;
1607         if (!tiocmget)
1608                 return -ENOENT;
1609         /*
1610          * note the counters on entry
1611          */
1612         spin_lock_irq(&serial->serial_lock);
1613         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1614         spin_unlock_irq(&serial->serial_lock);
1615         add_wait_queue(&tiocmget->waitq, &wait);
1616         for (;;) {
1617                 spin_lock_irq(&serial->serial_lock);
1618                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1619                 spin_unlock_irq(&serial->serial_lock);
1620                 set_current_state(TASK_INTERRUPTIBLE);
1621                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1622                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1623                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1624                         ret = 0;
1625                         break;
1626                 }
1627                 schedule();
1628                 /* see if a signal did it */
1629                 if (signal_pending(current)) {
1630                         ret = -ERESTARTSYS;
1631                         break;
1632                 }
1633                 cprev = cnow;
1634         }
1635         current->state = TASK_RUNNING;
1636         remove_wait_queue(&tiocmget->waitq, &wait);
1637
1638         return ret;
1639 }
1640
1641 /*
1642  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1643  * Return: write counters to the user passed counter struct
1644  * NB: both 1->0 and 0->1 transitions are counted except for
1645  *     RI where only 0->1 is counted.
1646  */
1647 static int hso_get_count(struct hso_serial *serial,
1648                           struct serial_icounter_struct __user *icnt)
1649 {
1650         struct serial_icounter_struct icount;
1651         struct uart_icount cnow;
1652         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1653
1654         if (!tiocmget)
1655                  return -ENOENT;
1656         spin_lock_irq(&serial->serial_lock);
1657         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1658         spin_unlock_irq(&serial->serial_lock);
1659
1660         icount.cts         = cnow.cts;
1661         icount.dsr         = cnow.dsr;
1662         icount.rng         = cnow.rng;
1663         icount.dcd         = cnow.dcd;
1664         icount.rx          = cnow.rx;
1665         icount.tx          = cnow.tx;
1666         icount.frame       = cnow.frame;
1667         icount.overrun     = cnow.overrun;
1668         icount.parity      = cnow.parity;
1669         icount.brk         = cnow.brk;
1670         icount.buf_overrun = cnow.buf_overrun;
1671
1672         return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1673 }
1674
1675
1676 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1677 {
1678         int retval;
1679         struct hso_serial *serial = get_serial_by_tty(tty);
1680         struct hso_tiocmget  *tiocmget;
1681         u16 UART_state_bitmap;
1682
1683         /* sanity check */
1684         if (!serial) {
1685                 D1("no tty structures");
1686                 return -EINVAL;
1687         }
1688         spin_lock_irq(&serial->serial_lock);
1689         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1690             ((serial->dtr_state) ? TIOCM_DTR : 0);
1691         tiocmget = serial->tiocmget;
1692         if (tiocmget) {
1693
1694                 UART_state_bitmap = le16_to_cpu(
1695                         tiocmget->prev_UART_state_bitmap);
1696                 if (UART_state_bitmap & B_RING_SIGNAL)
1697                         retval |=  TIOCM_RNG;
1698                 if (UART_state_bitmap & B_RX_CARRIER)
1699                         retval |=  TIOCM_CD;
1700                 if (UART_state_bitmap & B_TX_CARRIER)
1701                         retval |=  TIOCM_DSR;
1702         }
1703         spin_unlock_irq(&serial->serial_lock);
1704         return retval;
1705 }
1706
1707 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1708                                unsigned int set, unsigned int clear)
1709 {
1710         int val = 0;
1711         unsigned long flags;
1712         int if_num;
1713         struct hso_serial *serial = get_serial_by_tty(tty);
1714
1715         /* sanity check */
1716         if (!serial) {
1717                 D1("no tty structures");
1718                 return -EINVAL;
1719         }
1720
1721         if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1722                 return -EINVAL;
1723
1724         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1725
1726         spin_lock_irqsave(&serial->serial_lock, flags);
1727         if (set & TIOCM_RTS)
1728                 serial->rts_state = 1;
1729         if (set & TIOCM_DTR)
1730                 serial->dtr_state = 1;
1731
1732         if (clear & TIOCM_RTS)
1733                 serial->rts_state = 0;
1734         if (clear & TIOCM_DTR)
1735                 serial->dtr_state = 0;
1736
1737         if (serial->dtr_state)
1738                 val |= 0x01;
1739         if (serial->rts_state)
1740                 val |= 0x02;
1741
1742         spin_unlock_irqrestore(&serial->serial_lock, flags);
1743
1744         return usb_control_msg(serial->parent->usb,
1745                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1746                                0x21, val, if_num, NULL, 0,
1747                                USB_CTRL_SET_TIMEOUT);
1748 }
1749
1750 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1751                             unsigned int cmd, unsigned long arg)
1752 {
1753         struct hso_serial *serial =  get_serial_by_tty(tty);
1754         void __user *uarg = (void __user *)arg;
1755         int ret = 0;
1756         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1757
1758         if (!serial)
1759                 return -ENODEV;
1760         switch (cmd) {
1761         case TIOCMIWAIT:
1762                 ret = hso_wait_modem_status(serial, arg);
1763                 break;
1764
1765         case TIOCGICOUNT:
1766                 ret = hso_get_count(serial, uarg);
1767                 break;
1768         default:
1769                 ret = -ENOIOCTLCMD;
1770                 break;
1771         }
1772         return ret;
1773 }
1774
1775
1776 /* starts a transmit */
1777 static void hso_kick_transmit(struct hso_serial *serial)
1778 {
1779         u8 *temp;
1780         unsigned long flags;
1781         int res;
1782
1783         spin_lock_irqsave(&serial->serial_lock, flags);
1784         if (!serial->tx_buffer_count)
1785                 goto out;
1786
1787         if (serial->tx_urb_used)
1788                 goto out;
1789
1790         /* Wakeup USB interface if necessary */
1791         if (hso_get_activity(serial->parent) == -EAGAIN)
1792                 goto out;
1793
1794         /* Switch pointers around to avoid memcpy */
1795         temp = serial->tx_buffer;
1796         serial->tx_buffer = serial->tx_data;
1797         serial->tx_data = temp;
1798         serial->tx_data_count = serial->tx_buffer_count;
1799         serial->tx_buffer_count = 0;
1800
1801         /* If temp is set, it means we switched buffers */
1802         if (temp && serial->write_data) {
1803                 res = serial->write_data(serial);
1804                 if (res >= 0)
1805                         serial->tx_urb_used = 1;
1806         }
1807 out:
1808         spin_unlock_irqrestore(&serial->serial_lock, flags);
1809 }
1810
1811 /* make a request (for reading and writing data to muxed serial port) */
1812 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1813                               struct urb *ctrl_urb,
1814                               struct usb_ctrlrequest *ctrl_req,
1815                               u8 *ctrl_urb_data, u32 size)
1816 {
1817         int result;
1818         int pipe;
1819
1820         /* Sanity check */
1821         if (!serial || !ctrl_urb || !ctrl_req) {
1822                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1823                 return -EINVAL;
1824         }
1825
1826         /* initialize */
1827         ctrl_req->wValue = 0;
1828         ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1829         ctrl_req->wLength = cpu_to_le16(size);
1830
1831         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1832                 /* Reading command */
1833                 ctrl_req->bRequestType = USB_DIR_IN |
1834                                          USB_TYPE_OPTION_VENDOR |
1835                                          USB_RECIP_INTERFACE;
1836                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1837                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1838         } else {
1839                 /* Writing command */
1840                 ctrl_req->bRequestType = USB_DIR_OUT |
1841                                          USB_TYPE_OPTION_VENDOR |
1842                                          USB_RECIP_INTERFACE;
1843                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1844                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1845         }
1846         /* syslog */
1847         D2("%s command (%02x) len: %d, port: %d",
1848            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1849            ctrl_req->bRequestType, ctrl_req->wLength, port);
1850
1851         /* Load ctrl urb */
1852         ctrl_urb->transfer_flags = 0;
1853         usb_fill_control_urb(ctrl_urb,
1854                              serial->parent->usb,
1855                              pipe,
1856                              (u8 *) ctrl_req,
1857                              ctrl_urb_data, size, ctrl_callback, serial);
1858         /* Send it on merry way */
1859         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1860         if (result) {
1861                 dev_err(&ctrl_urb->dev->dev,
1862                         "%s failed submit ctrl_urb %d type %d\n", __func__,
1863                         result, type);
1864                 return result;
1865         }
1866
1867         /* done */
1868         return size;
1869 }
1870
1871 /* called by intr_callback when read occurs */
1872 static int hso_mux_serial_read(struct hso_serial *serial)
1873 {
1874         if (!serial)
1875                 return -EINVAL;
1876
1877         /* clean data */
1878         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1879         /* make the request */
1880
1881         if (serial->num_rx_urbs != 1) {
1882                 dev_err(&serial->parent->interface->dev,
1883                         "ERROR: mux'd reads with multiple buffers "
1884                         "not possible\n");
1885                 return 0;
1886         }
1887         return mux_device_request(serial,
1888                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1889                                   serial->parent->port_spec & HSO_PORT_MASK,
1890                                   serial->rx_urb[0],
1891                                   &serial->ctrl_req_rx,
1892                                   serial->rx_data[0], serial->rx_data_length);
1893 }
1894
1895 /* used for muxed serial port callback (muxed serial read) */
1896 static void intr_callback(struct urb *urb)
1897 {
1898         struct hso_shared_int *shared_int = urb->context;
1899         struct hso_serial *serial;
1900         unsigned char *port_req;
1901         int status = urb->status;
1902         int i;
1903
1904         usb_mark_last_busy(urb->dev);
1905
1906         /* sanity check */
1907         if (!shared_int)
1908                 return;
1909
1910         /* status check */
1911         if (status) {
1912                 handle_usb_error(status, __func__, NULL);
1913                 return;
1914         }
1915         D4("\n--- Got intr callback 0x%02X ---", status);
1916
1917         /* what request? */
1918         port_req = urb->transfer_buffer;
1919         D4(" port_req = 0x%.2X\n", *port_req);
1920         /* loop over all muxed ports to find the one sending this */
1921         for (i = 0; i < 8; i++) {
1922                 /* max 8 channels on MUX */
1923                 if (*port_req & (1 << i)) {
1924                         serial = get_serial_by_shared_int_and_type(shared_int,
1925                                                                    (1 << i));
1926                         if (serial != NULL) {
1927                                 D1("Pending read interrupt on port %d\n", i);
1928                                 spin_lock(&serial->serial_lock);
1929                                 if (serial->rx_state == RX_IDLE &&
1930                                         serial->open_count > 0) {
1931                                         /* Setup and send a ctrl req read on
1932                                          * port i */
1933                                         if (!serial->rx_urb_filled[0]) {
1934                                                 serial->rx_state = RX_SENT;
1935                                                 hso_mux_serial_read(serial);
1936                                         } else
1937                                                 serial->rx_state = RX_PENDING;
1938                                 } else {
1939                                         D1("Already a read pending on "
1940                                            "port %d or port not open\n", i);
1941                                 }
1942                                 spin_unlock(&serial->serial_lock);
1943                         }
1944                 }
1945         }
1946         /* Resubmit interrupt urb */
1947         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1948 }
1949
1950 /* called for writing to muxed serial port */
1951 static int hso_mux_serial_write_data(struct hso_serial *serial)
1952 {
1953         if (NULL == serial)
1954                 return -EINVAL;
1955
1956         return mux_device_request(serial,
1957                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1958                                   serial->parent->port_spec & HSO_PORT_MASK,
1959                                   serial->tx_urb,
1960                                   &serial->ctrl_req_tx,
1961                                   serial->tx_data, serial->tx_data_count);
1962 }
1963
1964 /* write callback for Diag and CS port */
1965 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1966 {
1967         struct hso_serial *serial = urb->context;
1968         int status = urb->status;
1969         struct tty_struct *tty;
1970
1971         /* sanity check */
1972         if (!serial) {
1973                 D1("serial == NULL");
1974                 return;
1975         }
1976
1977         spin_lock(&serial->serial_lock);
1978         serial->tx_urb_used = 0;
1979         tty = tty_kref_get(serial->tty);
1980         spin_unlock(&serial->serial_lock);
1981         if (status) {
1982                 handle_usb_error(status, __func__, serial->parent);
1983                 tty_kref_put(tty);
1984                 return;
1985         }
1986         hso_put_activity(serial->parent);
1987         if (tty) {
1988                 tty_wakeup(tty);
1989                 tty_kref_put(tty);
1990         }
1991         hso_kick_transmit(serial);
1992
1993         D1(" ");
1994 }
1995
1996 /* called for writing diag or CS serial port */
1997 static int hso_std_serial_write_data(struct hso_serial *serial)
1998 {
1999         int count = serial->tx_data_count;
2000         int result;
2001
2002         usb_fill_bulk_urb(serial->tx_urb,
2003                           serial->parent->usb,
2004                           usb_sndbulkpipe(serial->parent->usb,
2005                                           serial->out_endp->
2006                                           bEndpointAddress & 0x7F),
2007                           serial->tx_data, serial->tx_data_count,
2008                           hso_std_serial_write_bulk_callback, serial);
2009
2010         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
2011         if (result) {
2012                 dev_warn(&serial->parent->usb->dev,
2013                          "Failed to submit urb - res %d\n", result);
2014                 return result;
2015         }
2016
2017         return count;
2018 }
2019
2020 /* callback after read or write on muxed serial port */
2021 static void ctrl_callback(struct urb *urb)
2022 {
2023         struct hso_serial *serial = urb->context;
2024         struct usb_ctrlrequest *req;
2025         int status = urb->status;
2026         struct tty_struct *tty;
2027
2028         /* sanity check */
2029         if (!serial)
2030                 return;
2031
2032         spin_lock(&serial->serial_lock);
2033         serial->tx_urb_used = 0;
2034         tty = tty_kref_get(serial->tty);
2035         spin_unlock(&serial->serial_lock);
2036         if (status) {
2037                 handle_usb_error(status, __func__, serial->parent);
2038                 tty_kref_put(tty);
2039                 return;
2040         }
2041
2042         /* what request? */
2043         req = (struct usb_ctrlrequest *)(urb->setup_packet);
2044         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2045         D4("Actual length of urb = %d\n", urb->actual_length);
2046         DUMP1(urb->transfer_buffer, urb->actual_length);
2047
2048         if (req->bRequestType ==
2049             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2050                 /* response to a read command */
2051                 serial->rx_urb_filled[0] = 1;
2052                 spin_lock(&serial->serial_lock);
2053                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2054                 spin_unlock(&serial->serial_lock);
2055         } else {
2056                 hso_put_activity(serial->parent);
2057                 if (tty)
2058                         tty_wakeup(tty);
2059                 /* response to a write command */
2060                 hso_kick_transmit(serial);
2061         }
2062         tty_kref_put(tty);
2063 }
2064
2065 /* handle RX data for serial port */
2066 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2067 {
2068         struct tty_struct *tty;
2069         int write_length_remaining = 0;
2070         int curr_write_len;
2071
2072         /* Sanity check */
2073         if (urb == NULL || serial == NULL) {
2074                 D1("serial = NULL");
2075                 return -2;
2076         }
2077
2078         /* All callers to put_rxbuf_data hold serial_lock */
2079         tty = tty_kref_get(serial->tty);
2080
2081         /* Push data to tty */
2082         if (tty) {
2083                 write_length_remaining = urb->actual_length -
2084                         serial->curr_rx_urb_offset;
2085                 D1("data to push to tty");
2086                 while (write_length_remaining) {
2087                         if (test_bit(TTY_THROTTLED, &tty->flags)) {
2088                                 tty_kref_put(tty);
2089                                 return -1;
2090                         }
2091                         curr_write_len =  tty_insert_flip_string
2092                                 (tty, urb->transfer_buffer +
2093                                  serial->curr_rx_urb_offset,
2094                                  write_length_remaining);
2095                         serial->curr_rx_urb_offset += curr_write_len;
2096                         write_length_remaining -= curr_write_len;
2097                         tty_flip_buffer_push(tty);
2098                 }
2099         }
2100         if (write_length_remaining == 0) {
2101                 serial->curr_rx_urb_offset = 0;
2102                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2103         }
2104         tty_kref_put(tty);
2105         return write_length_remaining;
2106 }
2107
2108
2109 /* Base driver functions */
2110
2111 static void hso_log_port(struct hso_device *hso_dev)
2112 {
2113         char *port_type;
2114         char port_dev[20];
2115
2116         switch (hso_dev->port_spec & HSO_PORT_MASK) {
2117         case HSO_PORT_CONTROL:
2118                 port_type = "Control";
2119                 break;
2120         case HSO_PORT_APP:
2121                 port_type = "Application";
2122                 break;
2123         case HSO_PORT_GPS:
2124                 port_type = "GPS";
2125                 break;
2126         case HSO_PORT_GPS_CONTROL:
2127                 port_type = "GPS control";
2128                 break;
2129         case HSO_PORT_APP2:
2130                 port_type = "Application2";
2131                 break;
2132         case HSO_PORT_PCSC:
2133                 port_type = "PCSC";
2134                 break;
2135         case HSO_PORT_DIAG:
2136                 port_type = "Diagnostic";
2137                 break;
2138         case HSO_PORT_DIAG2:
2139                 port_type = "Diagnostic2";
2140                 break;
2141         case HSO_PORT_MODEM:
2142                 port_type = "Modem";
2143                 break;
2144         case HSO_PORT_NETWORK:
2145                 port_type = "Network";
2146                 break;
2147         default:
2148                 port_type = "Unknown";
2149                 break;
2150         }
2151         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2152                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2153         } else
2154                 sprintf(port_dev, "/dev/%s%d", tty_filename,
2155                         dev2ser(hso_dev)->minor);
2156
2157         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2158                 port_type, port_dev);
2159 }
2160
2161 static int hso_start_net_device(struct hso_device *hso_dev)
2162 {
2163         int i, result = 0;
2164         struct hso_net *hso_net = dev2net(hso_dev);
2165
2166         if (!hso_net)
2167                 return -ENODEV;
2168
2169         /* send URBs for all read buffers */
2170         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2171
2172                 /* Prep a receive URB */
2173                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2174                                   hso_dev->usb,
2175                                   usb_rcvbulkpipe(hso_dev->usb,
2176                                                   hso_net->in_endp->
2177                                                   bEndpointAddress & 0x7F),
2178                                   hso_net->mux_bulk_rx_buf_pool[i],
2179                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2180                                   hso_net);
2181
2182                 /* Put it out there so the device can send us stuff */
2183                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2184                                         GFP_NOIO);
2185                 if (result)
2186                         dev_warn(&hso_dev->usb->dev,
2187                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2188                                 i, result);
2189         }
2190
2191         return result;
2192 }
2193
2194 static int hso_stop_net_device(struct hso_device *hso_dev)
2195 {
2196         int i;
2197         struct hso_net *hso_net = dev2net(hso_dev);
2198
2199         if (!hso_net)
2200                 return -ENODEV;
2201
2202         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2203                 if (hso_net->mux_bulk_rx_urb_pool[i])
2204                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2205
2206         }
2207         if (hso_net->mux_bulk_tx_urb)
2208                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2209
2210         return 0;
2211 }
2212
2213 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2214 {
2215         int i, result = 0;
2216         struct hso_serial *serial = dev2ser(hso_dev);
2217
2218         if (!serial)
2219                 return -ENODEV;
2220
2221         /* If it is not the MUX port fill in and submit a bulk urb (already
2222          * allocated in hso_serial_start) */
2223         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2224                 for (i = 0; i < serial->num_rx_urbs; i++) {
2225                         usb_fill_bulk_urb(serial->rx_urb[i],
2226                                           serial->parent->usb,
2227                                           usb_rcvbulkpipe(serial->parent->usb,
2228                                                           serial->in_endp->
2229                                                           bEndpointAddress &
2230                                                           0x7F),
2231                                           serial->rx_data[i],
2232                                           serial->rx_data_length,
2233                                           hso_std_serial_read_bulk_callback,
2234                                           serial);
2235                         result = usb_submit_urb(serial->rx_urb[i], flags);
2236                         if (result) {
2237                                 dev_warn(&serial->parent->usb->dev,
2238                                          "Failed to submit urb - res %d\n",
2239                                          result);
2240                                 break;
2241                         }
2242                 }
2243         } else {
2244                 mutex_lock(&serial->shared_int->shared_int_lock);
2245                 if (!serial->shared_int->use_count) {
2246                         result =
2247                             hso_mux_submit_intr_urb(serial->shared_int,
2248                                                     hso_dev->usb, flags);
2249                 }
2250                 serial->shared_int->use_count++;
2251                 mutex_unlock(&serial->shared_int->shared_int_lock);
2252         }
2253         if (serial->tiocmget)
2254                 tiocmget_submit_urb(serial,
2255                                     serial->tiocmget,
2256                                     serial->parent->usb);
2257         return result;
2258 }
2259
2260 static int hso_stop_serial_device(struct hso_device *hso_dev)
2261 {
2262         int i;
2263         struct hso_serial *serial = dev2ser(hso_dev);
2264         struct hso_tiocmget  *tiocmget;
2265
2266         if (!serial)
2267                 return -ENODEV;
2268
2269         for (i = 0; i < serial->num_rx_urbs; i++) {
2270                 if (serial->rx_urb[i]) {
2271                                 usb_kill_urb(serial->rx_urb[i]);
2272                                 serial->rx_urb_filled[i] = 0;
2273                 }
2274         }
2275         serial->curr_rx_urb_idx = 0;
2276         serial->curr_rx_urb_offset = 0;
2277
2278         if (serial->tx_urb)
2279                 usb_kill_urb(serial->tx_urb);
2280
2281         if (serial->shared_int) {
2282                 mutex_lock(&serial->shared_int->shared_int_lock);
2283                 if (serial->shared_int->use_count &&
2284                     (--serial->shared_int->use_count == 0)) {
2285                         struct urb *urb;
2286
2287                         urb = serial->shared_int->shared_intr_urb;
2288                         if (urb)
2289                                 usb_kill_urb(urb);
2290                 }
2291                 mutex_unlock(&serial->shared_int->shared_int_lock);
2292         }
2293         tiocmget = serial->tiocmget;
2294         if (tiocmget) {
2295                 wake_up_interruptible(&tiocmget->waitq);
2296                 usb_kill_urb(tiocmget->urb);
2297         }
2298
2299         return 0;
2300 }
2301
2302 static void hso_serial_common_free(struct hso_serial *serial)
2303 {
2304         int i;
2305
2306         if (serial->parent->dev)
2307                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2308
2309         tty_unregister_device(tty_drv, serial->minor);
2310
2311         for (i = 0; i < serial->num_rx_urbs; i++) {
2312                 /* unlink and free RX URB */
2313                 usb_free_urb(serial->rx_urb[i]);
2314                 /* free the RX buffer */
2315                 kfree(serial->rx_data[i]);
2316         }
2317
2318         /* unlink and free TX URB */
2319         usb_free_urb(serial->tx_urb);
2320         kfree(serial->tx_data);
2321 }
2322
2323 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2324                                     int rx_size, int tx_size)
2325 {
2326         struct device *dev;
2327         int minor;
2328         int i;
2329
2330         minor = get_free_serial_index();
2331         if (minor < 0)
2332                 goto exit;
2333
2334         /* register our minor number */
2335         serial->parent->dev = tty_register_device(tty_drv, minor,
2336                                         &serial->parent->interface->dev);
2337         dev = serial->parent->dev;
2338         dev_set_drvdata(dev, serial->parent);
2339         i = device_create_file(dev, &dev_attr_hsotype);
2340
2341         /* fill in specific data for later use */
2342         serial->minor = minor;
2343         serial->magic = HSO_SERIAL_MAGIC;
2344         spin_lock_init(&serial->serial_lock);
2345         serial->num_rx_urbs = num_urbs;
2346
2347         /* RX, allocate urb and initialize */
2348
2349         /* prepare our RX buffer */
2350         serial->rx_data_length = rx_size;
2351         for (i = 0; i < serial->num_rx_urbs; i++) {
2352                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2353                 if (!serial->rx_urb[i]) {
2354                         dev_err(dev, "Could not allocate urb?\n");
2355                         goto exit;
2356                 }
2357                 serial->rx_urb[i]->transfer_buffer = NULL;
2358                 serial->rx_urb[i]->transfer_buffer_length = 0;
2359                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2360                                              GFP_KERNEL);
2361                 if (!serial->rx_data[i]) {
2362                         dev_err(dev, "%s - Out of memory\n", __func__);
2363                         goto exit;
2364                 }
2365         }
2366
2367         /* TX, allocate urb and initialize */
2368         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2369         if (!serial->tx_urb) {
2370                 dev_err(dev, "Could not allocate urb?\n");
2371                 goto exit;
2372         }
2373         serial->tx_urb->transfer_buffer = NULL;
2374         serial->tx_urb->transfer_buffer_length = 0;
2375         /* prepare our TX buffer */
2376         serial->tx_data_count = 0;
2377         serial->tx_buffer_count = 0;
2378         serial->tx_data_length = tx_size;
2379         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2380         if (!serial->tx_data) {
2381                 dev_err(dev, "%s - Out of memory\n", __func__);
2382                 goto exit;
2383         }
2384         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2385         if (!serial->tx_buffer) {
2386                 dev_err(dev, "%s - Out of memory\n", __func__);
2387                 goto exit;
2388         }
2389
2390         return 0;
2391 exit:
2392         hso_serial_common_free(serial);
2393         return -1;
2394 }
2395
2396 /* Creates a general hso device */
2397 static struct hso_device *hso_create_device(struct usb_interface *intf,
2398                                             int port_spec)
2399 {
2400         struct hso_device *hso_dev;
2401
2402         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2403         if (!hso_dev)
2404                 return NULL;
2405
2406         hso_dev->port_spec = port_spec;
2407         hso_dev->usb = interface_to_usbdev(intf);
2408         hso_dev->interface = intf;
2409         kref_init(&hso_dev->ref);
2410         mutex_init(&hso_dev->mutex);
2411
2412         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2413         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2414         INIT_WORK(&hso_dev->reset_device, reset_device);
2415
2416         return hso_dev;
2417 }
2418
2419 /* Removes a network device in the network device table */
2420 static int remove_net_device(struct hso_device *hso_dev)
2421 {
2422         int i;
2423
2424         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2425                 if (network_table[i] == hso_dev) {
2426                         network_table[i] = NULL;
2427                         break;
2428                 }
2429         }
2430         if (i == HSO_MAX_NET_DEVICES)
2431                 return -1;
2432         return 0;
2433 }
2434
2435 /* Frees our network device */
2436 static void hso_free_net_device(struct hso_device *hso_dev)
2437 {
2438         int i;
2439         struct hso_net *hso_net = dev2net(hso_dev);
2440
2441         if (!hso_net)
2442                 return;
2443
2444         remove_net_device(hso_net->parent);
2445
2446         if (hso_net->net) {
2447                 unregister_netdev(hso_net->net);
2448                 free_netdev(hso_net->net);
2449         }
2450
2451         /* start freeing */
2452         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2453                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2454                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2455                 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2456         }
2457         usb_free_urb(hso_net->mux_bulk_tx_urb);
2458         kfree(hso_net->mux_bulk_tx_buf);
2459         hso_net->mux_bulk_tx_buf = NULL;
2460
2461         kfree(hso_dev);
2462 }
2463
2464 static const struct net_device_ops hso_netdev_ops = {
2465         .ndo_open       = hso_net_open,
2466         .ndo_stop       = hso_net_close,
2467         .ndo_start_xmit = hso_net_start_xmit,
2468         .ndo_tx_timeout = hso_net_tx_timeout,
2469 };
2470
2471 /* initialize the network interface */
2472 static void hso_net_init(struct net_device *net)
2473 {
2474         struct hso_net *hso_net = netdev_priv(net);
2475
2476         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2477
2478         /* fill in the other fields */
2479         net->netdev_ops = &hso_netdev_ops;
2480         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2481         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2482         net->type = ARPHRD_NONE;
2483         net->mtu = DEFAULT_MTU - 14;
2484         net->tx_queue_len = 10;
2485         SET_ETHTOOL_OPS(net, &ops);
2486
2487         /* and initialize the semaphore */
2488         spin_lock_init(&hso_net->net_lock);
2489 }
2490
2491 /* Adds a network device in the network device table */
2492 static int add_net_device(struct hso_device *hso_dev)
2493 {
2494         int i;
2495
2496         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2497                 if (network_table[i] == NULL) {
2498                         network_table[i] = hso_dev;
2499                         break;
2500                 }
2501         }
2502         if (i == HSO_MAX_NET_DEVICES)
2503                 return -1;
2504         return 0;
2505 }
2506
2507 static int hso_rfkill_set_block(void *data, bool blocked)
2508 {
2509         struct hso_device *hso_dev = data;
2510         int enabled = !blocked;
2511         int rv;
2512
2513         mutex_lock(&hso_dev->mutex);
2514         if (hso_dev->usb_gone)
2515                 rv = 0;
2516         else
2517                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2518                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2519                                        USB_CTRL_SET_TIMEOUT);
2520         mutex_unlock(&hso_dev->mutex);
2521         return rv;
2522 }
2523
2524 static const struct rfkill_ops hso_rfkill_ops = {
2525         .set_block = hso_rfkill_set_block,
2526 };
2527
2528 /* Creates and sets up everything for rfkill */
2529 static void hso_create_rfkill(struct hso_device *hso_dev,
2530                              struct usb_interface *interface)
2531 {
2532         struct hso_net *hso_net = dev2net(hso_dev);
2533         struct device *dev = &hso_net->net->dev;
2534         char *rfkn;
2535
2536         rfkn = kzalloc(20, GFP_KERNEL);
2537         if (!rfkn)
2538                 dev_err(dev, "%s - Out of memory\n", __func__);
2539
2540         snprintf(rfkn, 20, "hso-%d",
2541                  interface->altsetting->desc.bInterfaceNumber);
2542
2543         hso_net->rfkill = rfkill_alloc(rfkn,
2544                                        &interface_to_usbdev(interface)->dev,
2545                                        RFKILL_TYPE_WWAN,
2546                                        &hso_rfkill_ops, hso_dev);
2547         if (!hso_net->rfkill) {
2548                 dev_err(dev, "%s - Out of memory\n", __func__);
2549                 kfree(rfkn);
2550                 return;
2551         }
2552         if (rfkill_register(hso_net->rfkill) < 0) {
2553                 rfkill_destroy(hso_net->rfkill);
2554                 kfree(rfkn);
2555                 hso_net->rfkill = NULL;
2556                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2557                 return;
2558         }
2559 }
2560
2561 static struct device_type hso_type = {
2562         .name   = "wwan",
2563 };
2564
2565 /* Creates our network device */
2566 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2567                                                 int port_spec)
2568 {
2569         int result, i;
2570         struct net_device *net;
2571         struct hso_net *hso_net;
2572         struct hso_device *hso_dev;
2573
2574         hso_dev = hso_create_device(interface, port_spec);
2575         if (!hso_dev)
2576                 return NULL;
2577
2578         /* allocate our network device, then we can put in our private data */
2579         /* call hso_net_init to do the basic initialization */
2580         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2581         if (!net) {
2582                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2583                 goto exit;
2584         }
2585
2586         hso_net = netdev_priv(net);
2587
2588         hso_dev->port_data.dev_net = hso_net;
2589         hso_net->net = net;
2590         hso_net->parent = hso_dev;
2591
2592         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2593                                       USB_DIR_IN);
2594         if (!hso_net->in_endp) {
2595                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2596                 goto exit;
2597         }
2598         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2599                                        USB_DIR_OUT);
2600         if (!hso_net->out_endp) {
2601                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2602                 goto exit;
2603         }
2604         SET_NETDEV_DEV(net, &interface->dev);
2605         SET_NETDEV_DEVTYPE(net, &hso_type);
2606
2607         /* registering our net device */
2608         result = register_netdev(net);
2609         if (result) {
2610                 dev_err(&interface->dev, "Failed to register device\n");
2611                 goto exit;
2612         }
2613
2614         /* start allocating */
2615         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2616                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2617                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2618                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2619                         goto exit;
2620                 }
2621                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2622                                                            GFP_KERNEL);
2623                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2624                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2625                         goto exit;
2626                 }
2627         }
2628         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2629         if (!hso_net->mux_bulk_tx_urb) {
2630                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2631                 goto exit;
2632         }
2633         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2634         if (!hso_net->mux_bulk_tx_buf) {
2635                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2636                 goto exit;
2637         }
2638
2639         add_net_device(hso_dev);
2640
2641         hso_log_port(hso_dev);
2642
2643         hso_create_rfkill(hso_dev, interface);
2644
2645         return hso_dev;
2646 exit:
2647         hso_free_net_device(hso_dev);
2648         return NULL;
2649 }
2650
2651 static void hso_free_tiomget(struct hso_serial *serial)
2652 {
2653         struct hso_tiocmget *tiocmget = serial->tiocmget;
2654         if (tiocmget) {
2655                 if (tiocmget->urb) {
2656                         usb_free_urb(tiocmget->urb);
2657                         tiocmget->urb = NULL;
2658                 }
2659                 serial->tiocmget = NULL;
2660                 kfree(tiocmget);
2661
2662         }
2663 }
2664
2665 /* Frees an AT channel ( goes for both mux and non-mux ) */
2666 static void hso_free_serial_device(struct hso_device *hso_dev)
2667 {
2668         struct hso_serial *serial = dev2ser(hso_dev);
2669
2670         if (!serial)
2671                 return;
2672         set_serial_by_index(serial->minor, NULL);
2673
2674         hso_serial_common_free(serial);
2675
2676         if (serial->shared_int) {
2677                 mutex_lock(&serial->shared_int->shared_int_lock);
2678                 if (--serial->shared_int->ref_count == 0)
2679                         hso_free_shared_int(serial->shared_int);
2680                 else
2681                         mutex_unlock(&serial->shared_int->shared_int_lock);
2682         }
2683         hso_free_tiomget(serial);
2684         kfree(serial);
2685         kfree(hso_dev);
2686 }
2687
2688 /* Creates a bulk AT channel */
2689 static struct hso_device *hso_create_bulk_serial_device(
2690                         struct usb_interface *interface, int port)
2691 {
2692         struct hso_device *hso_dev;
2693         struct hso_serial *serial;
2694         int num_urbs;
2695         struct hso_tiocmget *tiocmget;
2696
2697         hso_dev = hso_create_device(interface, port);
2698         if (!hso_dev)
2699                 return NULL;
2700
2701         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2702         if (!serial)
2703                 goto exit;
2704
2705         serial->parent = hso_dev;
2706         hso_dev->port_data.dev_serial = serial;
2707
2708         if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2709                 num_urbs = 2;
2710                 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2711                                            GFP_KERNEL);
2712                 /* it isn't going to break our heart if serial->tiocmget
2713                  *  allocation fails don't bother checking this.
2714                  */
2715                 if (serial->tiocmget) {
2716                         tiocmget = serial->tiocmget;
2717                         tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2718                         if (tiocmget->urb) {
2719                                 mutex_init(&tiocmget->mutex);
2720                                 init_waitqueue_head(&tiocmget->waitq);
2721                                 tiocmget->endp = hso_get_ep(
2722                                         interface,
2723                                         USB_ENDPOINT_XFER_INT,
2724                                         USB_DIR_IN);
2725                         } else
2726                                 hso_free_tiomget(serial);
2727                 }
2728         }
2729         else
2730                 num_urbs = 1;
2731
2732         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2733                                      BULK_URB_TX_SIZE))
2734                 goto exit;
2735
2736         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2737                                      USB_DIR_IN);
2738         if (!serial->in_endp) {
2739                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2740                 goto exit2;
2741         }
2742
2743         if (!
2744             (serial->out_endp =
2745              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2746                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2747                 goto exit2;
2748         }
2749
2750         serial->write_data = hso_std_serial_write_data;
2751
2752         /* and record this serial */
2753         set_serial_by_index(serial->minor, serial);
2754
2755         /* setup the proc dirs and files if needed */
2756         hso_log_port(hso_dev);
2757
2758         /* done, return it */
2759         return hso_dev;
2760
2761 exit2:
2762         hso_serial_common_free(serial);
2763 exit:
2764         hso_free_tiomget(serial);
2765         kfree(serial);
2766         kfree(hso_dev);
2767         return NULL;
2768 }
2769
2770 /* Creates a multiplexed AT channel */
2771 static
2772 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2773                                                 int port,
2774                                                 struct hso_shared_int *mux)
2775 {
2776         struct hso_device *hso_dev;
2777         struct hso_serial *serial;
2778         int port_spec;
2779
2780         port_spec = HSO_INTF_MUX;
2781         port_spec &= ~HSO_PORT_MASK;
2782
2783         port_spec |= hso_mux_to_port(port);
2784         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2785                 return NULL;
2786
2787         hso_dev = hso_create_device(interface, port_spec);
2788         if (!hso_dev)
2789                 return NULL;
2790
2791         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2792         if (!serial)
2793                 goto exit;
2794
2795         hso_dev->port_data.dev_serial = serial;
2796         serial->parent = hso_dev;
2797
2798         if (hso_serial_common_create
2799             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2800                 goto exit;
2801
2802         serial->tx_data_length--;
2803         serial->write_data = hso_mux_serial_write_data;
2804
2805         serial->shared_int = mux;
2806         mutex_lock(&serial->shared_int->shared_int_lock);
2807         serial->shared_int->ref_count++;
2808         mutex_unlock(&serial->shared_int->shared_int_lock);
2809
2810         /* and record this serial */
2811         set_serial_by_index(serial->minor, serial);
2812
2813         /* setup the proc dirs and files if needed */
2814         hso_log_port(hso_dev);
2815
2816         /* done, return it */
2817         return hso_dev;
2818
2819 exit:
2820         if (serial) {
2821                 tty_unregister_device(tty_drv, serial->minor);
2822                 kfree(serial);
2823         }
2824         if (hso_dev)
2825                 kfree(hso_dev);
2826         return NULL;
2827
2828 }
2829
2830 static void hso_free_shared_int(struct hso_shared_int *mux)
2831 {
2832         usb_free_urb(mux->shared_intr_urb);
2833         kfree(mux->shared_intr_buf);
2834         mutex_unlock(&mux->shared_int_lock);
2835         kfree(mux);
2836 }
2837
2838 static
2839 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2840 {
2841         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2842
2843         if (!mux)
2844                 return NULL;
2845
2846         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2847                                     USB_DIR_IN);
2848         if (!mux->intr_endp) {
2849                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2850                 goto exit;
2851         }
2852
2853         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2854         if (!mux->shared_intr_urb) {
2855                 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2856                 goto exit;
2857         }
2858         mux->shared_intr_buf =
2859                 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2860                         GFP_KERNEL);
2861         if (!mux->shared_intr_buf) {
2862                 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2863                 goto exit;
2864         }
2865
2866         mutex_init(&mux->shared_int_lock);
2867
2868         return mux;
2869
2870 exit:
2871         kfree(mux->shared_intr_buf);
2872         usb_free_urb(mux->shared_intr_urb);
2873         kfree(mux);
2874         return NULL;
2875 }
2876
2877 /* Gets the port spec for a certain interface */
2878 static int hso_get_config_data(struct usb_interface *interface)
2879 {
2880         struct usb_device *usbdev = interface_to_usbdev(interface);
2881         u8 config_data[17];
2882         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2883         s32 result;
2884
2885         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2886                             0x86, 0xC0, 0, 0, config_data, 17,
2887                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2888                 return -EIO;
2889         }
2890
2891         switch (config_data[if_num]) {
2892         case 0x0:
2893                 result = 0;
2894                 break;
2895         case 0x1:
2896                 result = HSO_PORT_DIAG;
2897                 break;
2898         case 0x2:
2899                 result = HSO_PORT_GPS;
2900                 break;
2901         case 0x3:
2902                 result = HSO_PORT_GPS_CONTROL;
2903                 break;
2904         case 0x4:
2905                 result = HSO_PORT_APP;
2906                 break;
2907         case 0x5:
2908                 result = HSO_PORT_APP2;
2909                 break;
2910         case 0x6:
2911                 result = HSO_PORT_CONTROL;
2912                 break;
2913         case 0x7:
2914                 result = HSO_PORT_NETWORK;
2915                 break;
2916         case 0x8:
2917                 result = HSO_PORT_MODEM;
2918                 break;
2919         case 0x9:
2920                 result = HSO_PORT_MSD;
2921                 break;
2922         case 0xa:
2923                 result = HSO_PORT_PCSC;
2924                 break;
2925         case 0xb:
2926                 result = HSO_PORT_VOICE;
2927                 break;
2928         default:
2929                 result = 0;
2930         }
2931
2932         if (result)
2933                 result |= HSO_INTF_BULK;
2934
2935         if (config_data[16] & 0x1)
2936                 result |= HSO_INFO_CRC_BUG;
2937
2938         return result;
2939 }
2940
2941 /* called once for each interface upon device insertion */
2942 static int hso_probe(struct usb_interface *interface,
2943                      const struct usb_device_id *id)
2944 {
2945         int mux, i, if_num, port_spec;
2946         unsigned char port_mask;
2947         struct hso_device *hso_dev = NULL;
2948         struct hso_shared_int *shared_int;
2949         struct hso_device *tmp_dev = NULL;
2950
2951         if_num = interface->altsetting->desc.bInterfaceNumber;
2952
2953         /* Get the interface/port specification from either driver_info or from
2954          * the device itself */
2955         if (id->driver_info)
2956                 port_spec = ((u32 *)(id->driver_info))[if_num];
2957         else
2958                 port_spec = hso_get_config_data(interface);
2959
2960         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2961                 dev_err(&interface->dev, "Not our interface\n");
2962                 return -ENODEV;
2963         }
2964         /* Check if we need to switch to alt interfaces prior to port
2965          * configuration */
2966         if (interface->num_altsetting > 1)
2967                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2968         interface->needs_remote_wakeup = 1;
2969
2970         /* Allocate new hso device(s) */
2971         switch (port_spec & HSO_INTF_MASK) {
2972         case HSO_INTF_MUX:
2973                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2974                         /* Create the network device */
2975                         if (!disable_net) {
2976                                 hso_dev = hso_create_net_device(interface,
2977                                                                 port_spec);
2978                                 if (!hso_dev)
2979                                         goto exit;
2980                                 tmp_dev = hso_dev;
2981                         }
2982                 }
2983
2984                 if (hso_get_mux_ports(interface, &port_mask))
2985                         /* TODO: de-allocate everything */
2986                         goto exit;
2987
2988                 shared_int = hso_create_shared_int(interface);
2989                 if (!shared_int)
2990                         goto exit;
2991
2992                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2993                         if (port_mask & i) {
2994                                 hso_dev = hso_create_mux_serial_device(
2995                                                 interface, i, shared_int);
2996                                 if (!hso_dev)
2997                                         goto exit;
2998                         }
2999                 }
3000
3001                 if (tmp_dev)
3002                         hso_dev = tmp_dev;
3003                 break;
3004
3005         case HSO_INTF_BULK:
3006                 /* It's a regular bulk interface */
3007                 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) &&
3008                     !disable_net)
3009                         hso_dev = hso_create_net_device(interface, port_spec);
3010                 else
3011                         hso_dev =
3012                             hso_create_bulk_serial_device(interface, port_spec);
3013                 if (!hso_dev)
3014                         goto exit;
3015                 break;
3016         default:
3017                 goto exit;
3018         }
3019
3020         /* save our data pointer in this device */
3021         usb_set_intfdata(interface, hso_dev);
3022
3023         /* done */
3024         return 0;
3025 exit:
3026         hso_free_interface(interface);
3027         return -ENODEV;
3028 }
3029
3030 /* device removed, cleaning up */
3031 static void hso_disconnect(struct usb_interface *interface)
3032 {
3033         hso_free_interface(interface);
3034
3035         /* remove reference of our private data */
3036         usb_set_intfdata(interface, NULL);
3037 }
3038
3039 static void async_get_intf(struct work_struct *data)
3040 {
3041         struct hso_device *hso_dev =
3042             container_of(data, struct hso_device, async_get_intf);
3043         usb_autopm_get_interface(hso_dev->interface);
3044 }
3045
3046 static void async_put_intf(struct work_struct *data)
3047 {
3048         struct hso_device *hso_dev =
3049             container_of(data, struct hso_device, async_put_intf);
3050         usb_autopm_put_interface(hso_dev->interface);
3051 }
3052
3053 static int hso_get_activity(struct hso_device *hso_dev)
3054 {
3055         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3056                 if (!hso_dev->is_active) {
3057                         hso_dev->is_active = 1;
3058                         schedule_work(&hso_dev->async_get_intf);
3059                 }
3060         }
3061
3062         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3063                 return -EAGAIN;
3064
3065         usb_mark_last_busy(hso_dev->usb);
3066
3067         return 0;
3068 }
3069
3070 static int hso_put_activity(struct hso_device *hso_dev)
3071 {
3072         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3073                 if (hso_dev->is_active) {
3074                         hso_dev->is_active = 0;
3075                         schedule_work(&hso_dev->async_put_intf);
3076                         return -EAGAIN;
3077                 }
3078         }
3079         hso_dev->is_active = 0;
3080         return 0;
3081 }
3082
3083 /* called by kernel when we need to suspend device */
3084 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3085 {
3086         int i, result;
3087
3088         /* Stop all serial ports */
3089         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3090                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3091                         result = hso_stop_serial_device(serial_table[i]);
3092                         if (result)
3093                                 goto out;
3094                 }
3095         }
3096
3097         /* Stop all network ports */
3098         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3099                 if (network_table[i] &&
3100                     (network_table[i]->interface == iface)) {
3101                         result = hso_stop_net_device(network_table[i]);
3102                         if (result)
3103                                 goto out;
3104                 }
3105         }
3106
3107 out:
3108         return 0;
3109 }
3110
3111 /* called by kernel when we need to resume device */
3112 static int hso_resume(struct usb_interface *iface)
3113 {
3114         int i, result = 0;
3115         struct hso_net *hso_net;
3116
3117         /* Start all serial ports */
3118         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3119                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3120                         if (dev2ser(serial_table[i])->open_count) {
3121                                 result =
3122                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3123                                 hso_kick_transmit(dev2ser(serial_table[i]));
3124                                 if (result)
3125                                         goto out;
3126                         }
3127                 }
3128         }
3129
3130         /* Start all network ports */
3131         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3132                 if (network_table[i] &&
3133                     (network_table[i]->interface == iface)) {
3134                         hso_net = dev2net(network_table[i]);
3135                         if (hso_net->flags & IFF_UP) {
3136                                 /* First transmit any lingering data,
3137                                    then restart the device. */
3138                                 if (hso_net->skb_tx_buf) {
3139                                         dev_dbg(&iface->dev,
3140                                                 "Transmitting"
3141                                                 " lingering data\n");
3142                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3143                                                            hso_net->net);
3144                                         hso_net->skb_tx_buf = NULL;
3145                                 }
3146                                 result = hso_start_net_device(network_table[i]);
3147                                 if (result)
3148                                         goto out;
3149                         }
3150                 }
3151         }
3152
3153 out:
3154         return result;
3155 }
3156
3157 static void reset_device(struct work_struct *data)
3158 {
3159         struct hso_device *hso_dev =
3160             container_of(data, struct hso_device, reset_device);
3161         struct usb_device *usb = hso_dev->usb;
3162         int result;
3163
3164         if (hso_dev->usb_gone) {
3165                 D1("No reset during disconnect\n");
3166         } else {
3167                 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3168                 if (result < 0)
3169                         D1("unable to lock device for reset: %d\n", result);
3170                 else {
3171                         usb_reset_device(usb);
3172                         usb_unlock_device(usb);
3173                 }
3174         }
3175 }
3176
3177 static void hso_serial_ref_free(struct kref *ref)
3178 {
3179         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3180
3181         hso_free_serial_device(hso_dev);
3182 }
3183
3184 static void hso_free_interface(struct usb_interface *interface)
3185 {
3186         struct hso_serial *hso_dev;
3187         struct tty_struct *tty;
3188         int i;
3189
3190         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3191                 if (serial_table[i] &&
3192                     (serial_table[i]->interface == interface)) {
3193                         hso_dev = dev2ser(serial_table[i]);
3194                         spin_lock_irq(&hso_dev->serial_lock);
3195                         tty = tty_kref_get(hso_dev->tty);
3196                         spin_unlock_irq(&hso_dev->serial_lock);
3197                         if (tty)
3198                                 tty_hangup(tty);
3199                         mutex_lock(&hso_dev->parent->mutex);
3200                         tty_kref_put(tty);
3201                         hso_dev->parent->usb_gone = 1;
3202                         mutex_unlock(&hso_dev->parent->mutex);
3203                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3204                 }
3205         }
3206
3207         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3208                 if (network_table[i] &&
3209                     (network_table[i]->interface == interface)) {
3210                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3211                         /* hso_stop_net_device doesn't stop the net queue since
3212                          * traffic needs to start it again when suspended */
3213                         netif_stop_queue(dev2net(network_table[i])->net);
3214                         hso_stop_net_device(network_table[i]);
3215                         cancel_work_sync(&network_table[i]->async_put_intf);
3216                         cancel_work_sync(&network_table[i]->async_get_intf);
3217                         if (rfk) {
3218                                 rfkill_unregister(rfk);
3219                                 rfkill_destroy(rfk);
3220                         }
3221                         hso_free_net_device(network_table[i]);
3222                 }
3223         }
3224 }
3225
3226 /* Helper functions */
3227
3228 /* Get the endpoint ! */
3229 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3230                                                   int type, int dir)
3231 {
3232         int i;
3233         struct usb_host_interface *iface = intf->cur_altsetting;
3234         struct usb_endpoint_descriptor *endp;
3235
3236         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3237                 endp = &iface->endpoint[i].desc;
3238                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3239                     (usb_endpoint_type(endp) == type))
3240                         return endp;
3241         }
3242
3243         return NULL;
3244 }
3245
3246 /* Get the byte that describes which ports are enabled */
3247 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3248 {
3249         int i;
3250         struct usb_host_interface *iface = intf->cur_altsetting;
3251
3252         if (iface->extralen == 3) {
3253                 *ports = iface->extra[2];
3254                 return 0;
3255         }
3256
3257         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3258                 if (iface->endpoint[i].extralen == 3) {
3259                         *ports = iface->endpoint[i].extra[2];
3260                         return 0;
3261                 }
3262         }
3263
3264         return -1;
3265 }
3266
3267 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3268 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3269                                    struct usb_device *usb, gfp_t gfp)
3270 {
3271         int result;
3272
3273         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3274                          usb_rcvintpipe(usb,
3275                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
3276                          shared_int->shared_intr_buf,
3277                          1,
3278                          intr_callback, shared_int,
3279                          shared_int->intr_endp->bInterval);
3280
3281         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3282         if (result)
3283                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3284                         result);
3285
3286         return result;
3287 }
3288
3289 /* operations setup of the serial interface */
3290 static const struct tty_operations hso_serial_ops = {
3291         .open = hso_serial_open,
3292         .close = hso_serial_close,
3293         .write = hso_serial_write,
3294         .write_room = hso_serial_write_room,
3295         .ioctl = hso_serial_ioctl,
3296         .set_termios = hso_serial_set_termios,
3297         .chars_in_buffer = hso_serial_chars_in_buffer,
3298         .tiocmget = hso_serial_tiocmget,
3299         .tiocmset = hso_serial_tiocmset,
3300         .unthrottle = hso_unthrottle
3301 };
3302
3303 static struct usb_driver hso_driver = {
3304         .name = driver_name,
3305         .probe = hso_probe,
3306         .disconnect = hso_disconnect,
3307         .id_table = hso_ids,
3308         .suspend = hso_suspend,
3309         .resume = hso_resume,
3310         .reset_resume = hso_resume,
3311         .supports_autosuspend = 1,
3312 };
3313
3314 static int __init hso_init(void)
3315 {
3316         int i;
3317         int result;
3318
3319         /* put it in the log */
3320         printk(KERN_INFO "hso: %s\n", version);
3321
3322         /* Initialise the serial table semaphore and table */
3323         spin_lock_init(&serial_table_lock);
3324         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3325                 serial_table[i] = NULL;
3326
3327         /* allocate our driver using the proper amount of supported minors */
3328         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3329         if (!tty_drv)
3330                 return -ENOMEM;
3331
3332         /* fill in all needed values */
3333         tty_drv->magic = TTY_DRIVER_MAGIC;
3334         tty_drv->owner = THIS_MODULE;
3335         tty_drv->driver_name = driver_name;
3336         tty_drv->name = tty_filename;
3337
3338         /* if major number is provided as parameter, use that one */
3339         if (tty_major)
3340                 tty_drv->major = tty_major;
3341
3342         tty_drv->minor_start = 0;
3343         tty_drv->num = HSO_SERIAL_TTY_MINORS;
3344         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3345         tty_drv->subtype = SERIAL_TYPE_NORMAL;
3346         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3347         tty_drv->init_termios = tty_std_termios;
3348         hso_init_termios(&tty_drv->init_termios);
3349         tty_set_operations(tty_drv, &hso_serial_ops);
3350
3351         /* register the tty driver */
3352         result = tty_register_driver(tty_drv);
3353         if (result) {
3354                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3355                         __func__, result);
3356                 return result;
3357         }
3358
3359         /* register this module as an usb driver */
3360         result = usb_register(&hso_driver);
3361         if (result) {
3362                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3363                         result);
3364                 /* cleanup serial interface */
3365                 tty_unregister_driver(tty_drv);
3366                 return result;
3367         }
3368
3369         /* done */
3370         return 0;
3371 }
3372
3373 static void __exit hso_exit(void)
3374 {
3375         printk(KERN_INFO "hso: unloaded\n");
3376
3377         tty_unregister_driver(tty_drv);
3378         /* deregister the usb driver */
3379         usb_deregister(&hso_driver);
3380 }
3381
3382 /* Module definitions */
3383 module_init(hso_init);
3384 module_exit(hso_exit);
3385
3386 MODULE_AUTHOR(MOD_AUTHOR);
3387 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3388 MODULE_LICENSE(MOD_LICENSE);
3389
3390 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3391 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3392 module_param(debug, int, S_IRUGO | S_IWUSR);
3393
3394 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3395 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3396 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3397
3398 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3399 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3400 module_param(disable_net, int, S_IRUGO | S_IWUSR);