drivers/net/wireless/libertas_tf/if_usb.c

   1 /*
   2  *  Copyright (C) 2008, cozybit Inc.
   3  *  Copyright (C) 2003-2006, Marvell International Ltd.
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or (at
   8  *  your option) any later version.
   9  */
  10 #include <linux/delay.h>
  11 #include <linux/moduleparam.h>
  12 #include <linux/firmware.h>
  13 #include <linux/netdevice.h>
  14 #include <linux/usb.h>
  15
  16 #define DRV_NAME "lbtf_usb"
  17
  18 #include "libertas_tf.h"
  19 #include "if_usb.h"
  20
  21 #define MESSAGE_HEADER_LEN      4
  22
  23 static char *lbtf_fw_name = "lbtf_usb.bin";
  24 module_param_named(fw_name, lbtf_fw_name, charp, 0644);
  25
  26 MODULE_FIRMWARE("lbtf_usb.bin");
  27
  28 static struct usb_device_id if_usb_table[] = {
  29         /* Enter the device signature inside */
  30         { USB_DEVICE(0x1286, 0x2001) },
  31         { USB_DEVICE(0x05a3, 0x8388) },
  32         {}      /* Terminating entry */
  33 };
  34
  35 MODULE_DEVICE_TABLE(usb, if_usb_table);
  36
  37 static void if_usb_receive(struct urb *urb);
  38 static void if_usb_receive_fwload(struct urb *urb);
  39 static int if_usb_prog_firmware(struct if_usb_card *cardp);
  40 static int if_usb_host_to_card(struct lbtf_private *priv, uint8_t type,
  41                                uint8_t *payload, uint16_t nb);
  42 static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload,
  43                         uint16_t nb, u8 data);
  44 static void if_usb_free(struct if_usb_card *cardp);
  45 static int if_usb_submit_rx_urb(struct if_usb_card *cardp);
  46 static int if_usb_reset_device(struct if_usb_card *cardp);
  47
  48 /**
  49  *  if_usb_wrike_bulk_callback -  call back to handle URB status
  50  *
  51  *  @param urb          pointer to urb structure
  52  */
  53 static void if_usb_write_bulk_callback(struct urb *urb)
  54 {
  55         if (urb->status != 0)
  56                 printk(KERN_INFO "libertastf: URB in failure status: %d\n",
  57                        urb->status);
  58 }
  59
  60 /**
  61  *  if_usb_free - free tx/rx urb, skb and rx buffer
  62  *
  63  *  @param cardp        pointer if_usb_card
  64  */
  65 static void if_usb_free(struct if_usb_card *cardp)
  66 {
  67         /* Unlink tx & rx urb */
  68         usb_kill_urb(cardp->tx_urb);
  69         usb_kill_urb(cardp->rx_urb);
  70         usb_kill_urb(cardp->cmd_urb);
  71
  72         usb_free_urb(cardp->tx_urb);
  73         cardp->tx_urb = NULL;
  74
  75         usb_free_urb(cardp->rx_urb);
  76         cardp->rx_urb = NULL;
  77
  78         usb_free_urb(cardp->cmd_urb);
  79         cardp->cmd_urb = NULL;
  80
  81         kfree(cardp->ep_out_buf);
  82         cardp->ep_out_buf = NULL;
  83 }
  84
  85 static void if_usb_setup_firmware(struct lbtf_private *priv)
  86 {
  87         struct if_usb_card *cardp = priv->card;
  88         struct cmd_ds_set_boot2_ver b2_cmd;
  89
  90         if_usb_submit_rx_urb(cardp);
  91         b2_cmd.hdr.size = cpu_to_le16(sizeof(b2_cmd));
  92         b2_cmd.action = 0;
  93         b2_cmd.version = cardp->boot2_version;
  94
  95         if (lbtf_cmd_with_response(priv, CMD_SET_BOOT2_VER, &b2_cmd))
  96                 printk(KERN_INFO "libertastf: setting boot2 version failed\n");
  97 }
  98
  99 static void if_usb_fw_timeo(unsigned long priv)
 100 {
 101         struct if_usb_card *cardp = (void *)priv;
 102
 103         if (!cardp->fwdnldover)
 104                 /* Download timed out */
 105                 cardp->priv->surpriseremoved = 1;
 106         wake_up(&cardp->fw_wq);
 107 }
 108
 109 /**
 110  *  if_usb_probe - sets the configuration values
 111  *
 112  *  @ifnum      interface number
 113  *  @id         pointer to usb_device_id
 114  *
 115  *  Returns: 0 on success, error code on failure
 116  */
 117 static int if_usb_probe(struct usb_interface *intf,
 118                         const struct usb_device_id *id)
 119 {
 120         struct usb_device *udev;
 121         struct usb_host_interface *iface_desc;
 122         struct usb_endpoint_descriptor *endpoint;
 123         struct lbtf_private *priv;
 124         struct if_usb_card *cardp;
 125         int i;
 126
 127         udev = interface_to_usbdev(intf);
 128
 129         cardp = kzalloc(sizeof(struct if_usb_card), GFP_KERNEL);
 130         if (!cardp)
 131                 goto error;
 132
 133         setup_timer(&cardp->fw_timeout, if_usb_fw_timeo, (unsigned long)cardp);
 134         init_waitqueue_head(&cardp->fw_wq);
 135
 136         cardp->udev = udev;
 137         iface_desc = intf->cur_altsetting;
 138
 139         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 140                 endpoint = &iface_desc->endpoint[i].desc;
 141                 if (usb_endpoint_is_bulk_in(endpoint)) {
 142                         cardp->ep_in_size =
 143                                 le16_to_cpu(endpoint->wMaxPacketSize);
 144                         cardp->ep_in = usb_endpoint_num(endpoint);
 145                 } else if (usb_endpoint_is_bulk_out(endpoint)) {
 146                         cardp->ep_out_size =
 147                                 le16_to_cpu(endpoint->wMaxPacketSize);
 148                         cardp->ep_out = usb_endpoint_num(endpoint);
 149                 }
 150         }
 151         if (!cardp->ep_out_size || !cardp->ep_in_size)
 152                 /* Endpoints not found */
 153                 goto dealloc;
 154
 155         cardp->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 156         if (!cardp->rx_urb)
 157                 goto dealloc;
 158
 159         cardp->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 160         if (!cardp->tx_urb)
 161                 goto dealloc;
 162
 163         cardp->cmd_urb = usb_alloc_urb(0, GFP_KERNEL);
 164         if (!cardp->cmd_urb)
 165                 goto dealloc;
 166
 167         cardp->ep_out_buf = kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE,
 168                                     GFP_KERNEL);
 169         if (!cardp->ep_out_buf)
 170                 goto dealloc;
 171
 172         priv = lbtf_add_card(cardp, &udev->dev);
 173         if (!priv)
 174                 goto dealloc;
 175
 176         cardp->priv = priv;
 177
 178         priv->hw_host_to_card = if_usb_host_to_card;
 179         priv->hw_prog_firmware = if_usb_prog_firmware;
 180         priv->hw_reset_device = if_usb_reset_device;
 181         cardp->boot2_version = udev->descriptor.bcdDevice;
 182
 183         usb_get_dev(udev);
 184         usb_set_intfdata(intf, cardp);
 185
 186         return 0;
 187
 188 dealloc:
 189         if_usb_free(cardp);
 190 error:
 191         return -ENOMEM;
 192 }
 193
 194 /**
 195  *  if_usb_disconnect -  free resource and cleanup
 196  *
 197  *  @intf       USB interface structure
 198  */
 199 static void if_usb_disconnect(struct usb_interface *intf)
 200 {
 201         struct if_usb_card *cardp = usb_get_intfdata(intf);
 202         struct lbtf_private *priv = (struct lbtf_private *) cardp->priv;
 203
 204         if_usb_reset_device(cardp);
 205
 206         if (priv)
 207                 lbtf_remove_card(priv);
 208
 209         /* Unlink and free urb */
 210         if_usb_free(cardp);
 211
 212         usb_set_intfdata(intf, NULL);
 213         usb_put_dev(interface_to_usbdev(intf));
 214 }
 215
 216 /**
 217  *  if_usb_send_fw_pkt -  This function downloads the FW
 218  *
 219  *  @priv       pointer to struct lbtf_private
 220  *
 221  *  Returns: 0
 222  */
 223 static int if_usb_send_fw_pkt(struct if_usb_card *cardp)
 224 {
 225         struct fwdata *fwdata = cardp->ep_out_buf;
 226         u8 *firmware = (u8 *) cardp->fw->data;
 227
 228         /* If we got a CRC failure on the last block, back
 229            up and retry it */
 230         if (!cardp->CRC_OK) {
 231                 cardp->totalbytes = cardp->fwlastblksent;
 232                 cardp->fwseqnum--;
 233         }
 234
 235         /* struct fwdata (which we sent to the card) has an
 236            extra __le32 field in between the header and the data,
 237            which is not in the struct fwheader in the actual
 238            firmware binary. Insert the seqnum in the middle... */
 239         memcpy(&fwdata->hdr, &firmware[cardp->totalbytes],
 240                sizeof(struct fwheader));
 241
 242         cardp->fwlastblksent = cardp->totalbytes;
 243         cardp->totalbytes += sizeof(struct fwheader);
 244
 245         memcpy(fwdata->data, &firmware[cardp->totalbytes],
 246                le32_to_cpu(fwdata->hdr.datalength));
 247
 248         fwdata->seqnum = cpu_to_le32(++cardp->fwseqnum);
 249         cardp->totalbytes += le32_to_cpu(fwdata->hdr.datalength);
 250
 251         usb_tx_block(cardp, cardp->ep_out_buf, sizeof(struct fwdata) +
 252                      le32_to_cpu(fwdata->hdr.datalength), 0);
 253
 254         if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_LAST_BLOCK))
 255                 /* Host has finished FW downloading
 256                  * Donwloading FW JUMP BLOCK
 257                  */
 258                 cardp->fwfinalblk = 1;
 259
 260         return 0;
 261 }
 262
 263 static int if_usb_reset_device(struct if_usb_card *cardp)
 264 {
 265         struct cmd_ds_802_11_reset *cmd = cardp->ep_out_buf + 4;
 266         int ret;
 267
 268         *(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
 269
 270         cmd->hdr.command = cpu_to_le16(CMD_802_11_RESET);
 271         cmd->hdr.size = cpu_to_le16(sizeof(struct cmd_ds_802_11_reset));
 272         cmd->hdr.result = cpu_to_le16(0);
 273         cmd->hdr.seqnum = cpu_to_le16(0x5a5a);
 274         cmd->action = cpu_to_le16(CMD_ACT_HALT);
 275         usb_tx_block(cardp, cardp->ep_out_buf,
 276                      4 + sizeof(struct cmd_ds_802_11_reset), 0);
 277
 278         msleep(100);
 279         ret = usb_reset_device(cardp->udev);
 280         msleep(100);
 281
 282         return ret;
 283 }
 284 EXPORT_SYMBOL_GPL(if_usb_reset_device);
 285
 286 /**
 287  *  usb_tx_block - transfer data to the device
 288  *
 289  *  @priv       pointer to struct lbtf_private
 290  *  @payload    pointer to payload data
 291  *  @nb         data length
 292  *  @data       non-zero for data, zero for commands
 293  *
 294  *  Returns: 0 on success, nonzero otherwise.
 295  */
 296 static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload,
 297                         uint16_t nb, u8 data)
 298 {
 299         struct urb *urb;
 300
 301         /* check if device is removed */
 302         if (cardp->priv->surpriseremoved)
 303                 return -1;
 304
 305         if (data)
 306                 urb = cardp->tx_urb;
 307         else
 308                 urb = cardp->cmd_urb;
 309
 310         usb_fill_bulk_urb(urb, cardp->udev,
 311                           usb_sndbulkpipe(cardp->udev,
 312                                           cardp->ep_out),
 313                           payload, nb, if_usb_write_bulk_callback, cardp);
 314
 315         urb->transfer_flags |= URB_ZERO_PACKET;
 316
 317         if (usb_submit_urb(urb, GFP_ATOMIC))
 318                 return -1;
 319         return 0;
 320 }
 321
 322 static int __if_usb_submit_rx_urb(struct if_usb_card *cardp,
 323                                   void (*callbackfn)(struct urb *urb))
 324 {
 325         struct sk_buff *skb;
 326
 327         skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE);
 328         if (!skb)
 329                 return -1;
 330
 331         cardp->rx_skb = skb;
 332
 333         /* Fill the receive configuration URB and initialise the Rx call back */
 334         usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
 335                           usb_rcvbulkpipe(cardp->udev, cardp->ep_in),
 336                           skb_tail_pointer(skb),
 337                           MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn, cardp);
 338
 339         cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;
 340
 341         if (usb_submit_urb(cardp->rx_urb, GFP_ATOMIC)) {
 342                 kfree_skb(skb);
 343                 cardp->rx_skb = NULL;
 344                 return -1;
 345         } else
 346                 return 0;
 347 }
 348
 349 static int if_usb_submit_rx_urb_fwload(struct if_usb_card *cardp)
 350 {
 351         return __if_usb_submit_rx_urb(cardp, &if_usb_receive_fwload);
 352 }
 353
 354 static int if_usb_submit_rx_urb(struct if_usb_card *cardp)
 355 {
 356         return __if_usb_submit_rx_urb(cardp, &if_usb_receive);
 357 }
 358
 359 static void if_usb_receive_fwload(struct urb *urb)
 360 {
 361         struct if_usb_card *cardp = urb->context;
 362         struct sk_buff *skb = cardp->rx_skb;
 363         struct fwsyncheader *syncfwheader;
 364         struct bootcmdresp bcmdresp;
 365
 366         if (urb->status) {
 367                 kfree_skb(skb);
 368                 return;
 369         }
 370
 371         if (cardp->fwdnldover) {
 372                 __le32 *tmp = (__le32 *)(skb->data);
 373
 374                 if (tmp[0] == cpu_to_le32(CMD_TYPE_INDICATION) &&
 375                     tmp[1] == cpu_to_le32(MACREG_INT_CODE_FIRMWARE_READY))
 376                         /* Firmware ready event received */
 377                         wake_up(&cardp->fw_wq);
 378                 else
 379                         if_usb_submit_rx_urb_fwload(cardp);
 380                 kfree_skb(skb);
 381                 return;
 382         }
 383         if (cardp->bootcmdresp <= 0) {
 384                 memcpy(&bcmdresp, skb->data, sizeof(bcmdresp));
 385
 386                 if (le16_to_cpu(cardp->udev->descriptor.bcdDevice) < 0x3106) {
 387                         kfree_skb(skb);
 388                         if_usb_submit_rx_urb_fwload(cardp);
 389                         cardp->bootcmdresp = 1;
 390                         /* Received valid boot command response */
 391                         return;
 392                 }
 393                 if (bcmdresp.magic != cpu_to_le32(BOOT_CMD_MAGIC_NUMBER)) {
 394                         if (bcmdresp.magic == cpu_to_le32(CMD_TYPE_REQUEST) ||
 395                             bcmdresp.magic == cpu_to_le32(CMD_TYPE_DATA) ||
 396                             bcmdresp.magic == cpu_to_le32(CMD_TYPE_INDICATION))
 397                                 cardp->bootcmdresp = -1;
 398                 } else if (bcmdresp.cmd == BOOT_CMD_FW_BY_USB &&
 399                            bcmdresp.result == BOOT_CMD_RESP_OK)
 400                         cardp->bootcmdresp = 1;
 401
 402                 kfree_skb(skb);
 403                 if_usb_submit_rx_urb_fwload(cardp);
 404                 return;
 405         }
 406
 407         syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
 408         if (!syncfwheader) {
 409                 kfree_skb(skb);
 410                 return;
 411         }
 412
 413         memcpy(syncfwheader, skb->data, sizeof(struct fwsyncheader));
 414
 415         if (!syncfwheader->cmd)
 416                 cardp->CRC_OK = 1;
 417         else
 418                 cardp->CRC_OK = 0;
 419         kfree_skb(skb);
 420
 421         /* reschedule timer for 200ms hence */
 422         mod_timer(&cardp->fw_timeout, jiffies + (HZ/5));
 423
 424         if (cardp->fwfinalblk) {
 425                 cardp->fwdnldover = 1;
 426                 goto exit;
 427         }
 428
 429         if_usb_send_fw_pkt(cardp);
 430
 431  exit:
 432         if_usb_submit_rx_urb_fwload(cardp);
 433
 434         kfree(syncfwheader);
 435
 436         return;
 437 }
 438
 439 #define MRVDRV_MIN_PKT_LEN      30
 440
 441 static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
 442                                        struct if_usb_card *cardp,
 443                                        struct lbtf_private *priv)
 444 {
 445         if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + MESSAGE_HEADER_LEN
 446             || recvlength < MRVDRV_MIN_PKT_LEN) {
 447                 kfree_skb(skb);
 448                 return;
 449         }
 450
 451         skb_put(skb, recvlength);
 452         skb_pull(skb, MESSAGE_HEADER_LEN);
 453         lbtf_rx(priv, skb);
 454 }
 455
 456 static inline void process_cmdrequest(int recvlength, uint8_t *recvbuff,
 457                                       struct sk_buff *skb,
 458                                       struct if_usb_card *cardp,
 459                                       struct lbtf_private *priv)
 460 {
 461         if (recvlength > LBS_CMD_BUFFER_SIZE) {
 462                 kfree_skb(skb);
 463                 return;
 464         }
 465
 466         BUG_ON(!in_interrupt());
 467
 468         spin_lock(&priv->driver_lock);
 469         memcpy(priv->cmd_resp_buff, recvbuff + MESSAGE_HEADER_LEN,
 470                recvlength - MESSAGE_HEADER_LEN);
 471         kfree_skb(skb);
 472         lbtf_cmd_response_rx(priv);
 473         spin_unlock(&priv->driver_lock);
 474 }
 475
 476 /**
 477  *  if_usb_receive - read data received from the device.
 478  *
 479  *  @urb                pointer to struct urb
 480  */
 481 static void if_usb_receive(struct urb *urb)
 482 {
 483         struct if_usb_card *cardp = urb->context;
 484         struct sk_buff *skb = cardp->rx_skb;
 485         struct lbtf_private *priv = cardp->priv;
 486         int recvlength = urb->actual_length;
 487         uint8_t *recvbuff = NULL;
 488         uint32_t recvtype = 0;
 489         __le32 *pkt = (__le32 *) skb->data;
 490
 491         if (recvlength) {
 492                 if (urb->status) {
 493                         kfree_skb(skb);
 494                         goto setup_for_next;
 495                 }
 496
 497                 recvbuff = skb->data;
 498                 recvtype = le32_to_cpu(pkt[0]);
 499         } else if (urb->status) {
 500                 kfree_skb(skb);
 501                 return;
 502         }
 503
 504         switch (recvtype) {
 505         case CMD_TYPE_DATA:
 506                 process_cmdtypedata(recvlength, skb, cardp, priv);
 507                 break;
 508
 509         case CMD_TYPE_REQUEST:
 510                 process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
 511                 break;
 512
 513         case CMD_TYPE_INDICATION:
 514         {
 515                 /* Event cause handling */
 516                 u32 event_cause = le32_to_cpu(pkt[1]);
 517
 518                 /* Icky undocumented magic special case */
 519                 if (event_cause & 0xffff0000) {
 520                         u16 tmp;
 521                         u8 retrycnt;
 522                         u8 failure;
 523
 524                         tmp = event_cause >> 16;
 525                         retrycnt = tmp & 0x00ff;
 526                         failure = (tmp & 0xff00) >> 8;
 527                         lbtf_send_tx_feedback(priv, retrycnt, failure);
 528                 } else if (event_cause == LBTF_EVENT_BCN_SENT)
 529                         lbtf_bcn_sent(priv);
 530                 else
 531                         printk(KERN_DEBUG
 532                                "Unsupported notification %d received\n",
 533                                event_cause);
 534                 kfree_skb(skb);
 535                 break;
 536         }
 537         default:
 538                 printk(KERN_DEBUG "libertastf: unknown command type 0x%X\n",
 539                              recvtype);
 540                 kfree_skb(skb);
 541                 break;
 542         }
 543
 544 setup_for_next:
 545         if_usb_submit_rx_urb(cardp);
 546 }
 547
 548 /**
 549  *  if_usb_host_to_card -  Download data to the device
 550  *
 551  *  @priv               pointer to struct lbtf_private structure
 552  *  @type               type of data
 553  *  @buf                pointer to data buffer
 554  *  @len                number of bytes
 555  *
 556  *  Returns: 0 on success, nonzero otherwise
 557  */
 558 static int if_usb_host_to_card(struct lbtf_private *priv, uint8_t type,
 559                                uint8_t *payload, uint16_t nb)
 560 {
 561         struct if_usb_card *cardp = priv->card;
 562         u8 data = 0;
 563
 564         if (type == MVMS_CMD) {
 565                 *(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
 566         } else {
 567                 *(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_DATA);
 568                 data = 1;
 569         }
 570
 571         memcpy((cardp->ep_out_buf + MESSAGE_HEADER_LEN), payload, nb);
 572
 573         return usb_tx_block(cardp, cardp->ep_out_buf, nb + MESSAGE_HEADER_LEN,
 574                             data);
 575 }
 576
 577 /**
 578  *  if_usb_issue_boot_command - Issue boot command to Boot2.
 579  *
 580  *  @ivalue   1 boots from FW by USB-Download, 2 boots from FW in EEPROM.
 581  *
 582  *  Returns: 0
 583  */
 584 static int if_usb_issue_boot_command(struct if_usb_card *cardp, int ivalue)
 585 {
 586         struct bootcmd *bootcmd = cardp->ep_out_buf;
 587
 588         /* Prepare command */
 589         bootcmd->magic = cpu_to_le32(BOOT_CMD_MAGIC_NUMBER);
 590         bootcmd->cmd = ivalue;
 591         memset(bootcmd->pad, 0, sizeof(bootcmd->pad));
 592
 593         /* Issue command */
 594         usb_tx_block(cardp, cardp->ep_out_buf, sizeof(*bootcmd), 0);
 595
 596         return 0;
 597 }
 598
 599
 600 /**
 601  *  check_fwfile_format - Check the validity of Boot2/FW image.
 602  *
 603  *  @data       pointer to image
 604  *  @totlen     image length
 605  *
 606  *  Returns: 0 if the image is valid, nonzero otherwise.
 607  */
 608 static int check_fwfile_format(const u8 *data, u32 totlen)
 609 {
 610         u32 bincmd, exit;
 611         u32 blksize, offset, len;
 612         int ret;
 613
 614         ret = 1;
 615         exit = len = 0;
 616
 617         do {
 618                 struct fwheader *fwh = (void *) data;
 619
 620                 bincmd = le32_to_cpu(fwh->dnldcmd);
 621                 blksize = le32_to_cpu(fwh->datalength);
 622                 switch (bincmd) {
 623                 case FW_HAS_DATA_TO_RECV:
 624                         offset = sizeof(struct fwheader) + blksize;
 625                         data += offset;
 626                         len += offset;
 627                         if (len >= totlen)
 628                                 exit = 1;
 629                         break;
 630                 case FW_HAS_LAST_BLOCK:
 631                         exit = 1;
 632                         ret = 0;
 633                         break;
 634                 default:
 635                         exit = 1;
 636                         break;
 637                 }
 638         } while (!exit);
 639
 640         if (ret)
 641                 printk(KERN_INFO
 642                        "libertastf: firmware file format check failed\n");
 643         return ret;
 644 }
 645
 646
 647 static int if_usb_prog_firmware(struct if_usb_card *cardp)
 648 {
 649         int i = 0;
 650         static int reset_count = 10;
 651         int ret = 0;
 652
 653         ret = request_firmware(&cardp->fw, lbtf_fw_name, &cardp->udev->dev);
 654         if (ret < 0) {
 655                 printk(KERN_INFO "libertastf: firmware %s not found\n",
 656                        lbtf_fw_name);
 657                 goto done;
 658         }
 659
 660         if (check_fwfile_format(cardp->fw->data, cardp->fw->size))
 661                 goto release_fw;
 662
 663 restart:
 664         if (if_usb_submit_rx_urb_fwload(cardp) < 0) {
 665                 ret = -1;
 666                 goto release_fw;
 667         }
 668
 669         cardp->bootcmdresp = 0;
 670         do {
 671                 int j = 0;
 672                 i++;
 673                 /* Issue Boot command = 1, Boot from Download-FW */
 674                 if_usb_issue_boot_command(cardp, BOOT_CMD_FW_BY_USB);
 675                 /* wait for command response */
 676                 do {
 677                         j++;
 678                         msleep_interruptible(100);
 679                 } while (cardp->bootcmdresp == 0 && j < 10);
 680         } while (cardp->bootcmdresp == 0 && i < 5);
 681
 682         if (cardp->bootcmdresp <= 0) {
 683                 if (--reset_count >= 0) {
 684                         if_usb_reset_device(cardp);
 685                         goto restart;
 686                 }
 687                 return -1;
 688         }
 689
 690         i = 0;
 691
 692         cardp->totalbytes = 0;
 693         cardp->fwlastblksent = 0;
 694         cardp->CRC_OK = 1;
 695         cardp->fwdnldover = 0;
 696         cardp->fwseqnum = -1;
 697         cardp->totalbytes = 0;
 698         cardp->fwfinalblk = 0;
 699
 700         /* Send the first firmware packet... */
 701         if_usb_send_fw_pkt(cardp);
 702
 703         /* ... and wait for the process to complete */
 704         wait_event_interruptible(cardp->fw_wq, cardp->priv->surpriseremoved ||
 705                                                cardp->fwdnldover);
 706
 707         del_timer_sync(&cardp->fw_timeout);
 708         usb_kill_urb(cardp->rx_urb);
 709
 710         if (!cardp->fwdnldover) {
 711                 printk(KERN_INFO "libertastf: failed to load fw,"
 712                                  " resetting device!\n");
 713                 if (--reset_count >= 0) {
 714                         if_usb_reset_device(cardp);
 715                         goto restart;
 716                 }
 717
 718                 printk(KERN_INFO "libertastf: fw download failure\n");
 719                 ret = -1;
 720                 goto release_fw;
 721         }
 722
 723         cardp->priv->fw_ready = 1;
 724
 725  release_fw:
 726         release_firmware(cardp->fw);
 727         cardp->fw = NULL;
 728
 729         if_usb_setup_firmware(cardp->priv);
 730
 731  done:
 732         return ret;
 733 }
 734 EXPORT_SYMBOL_GPL(if_usb_prog_firmware);
 735
 736
 737 #define if_usb_suspend NULL
 738 #define if_usb_resume NULL
 739
 740 static struct usb_driver if_usb_driver = {
 741         .name = DRV_NAME,
 742         .probe = if_usb_probe,
 743         .disconnect = if_usb_disconnect,
 744         .id_table = if_usb_table,
 745         .suspend = if_usb_suspend,
 746         .resume = if_usb_resume,
 747 };
 748
 749 static int __init if_usb_init_module(void)
 750 {
 751         int ret = 0;
 752
 753         ret = usb_register(&if_usb_driver);
 754         return ret;
 755 }
 756
 757 static void __exit if_usb_exit_module(void)
 758 {
 759         usb_deregister(&if_usb_driver);
 760 }
 761
 762 module_init(if_usb_init_module);
 763 module_exit(if_usb_exit_module);
 764
 765 MODULE_DESCRIPTION("8388 USB WLAN Thinfirm Driver");
 766 MODULE_AUTHOR("Cozybit Inc.");
 767 MODULE_LICENSE("GPL");