git.oblomov.eu Git - linux-2.6/blob - 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 static struct usb_device_id if_usb_table[] = {
  27         /* Enter the device signature inside */
  28         { USB_DEVICE(0x1286, 0x2001) },
  29         { USB_DEVICE(0x05a3, 0x8388) },
  30         {}      /* Terminating entry */
  31 };
  32
  33 MODULE_DEVICE_TABLE(usb, if_usb_table);
  34
  35 static void if_usb_receive(struct urb *urb);
  36 static void if_usb_receive_fwload(struct urb *urb);
  37 static int if_usb_prog_firmware(struct if_usb_card *cardp);
  38 static int if_usb_host_to_card(struct lbtf_private *priv, uint8_t type,
  39                                uint8_t *payload, uint16_t nb);
  40 static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload,
  41                         uint16_t nb, u8 data);
  42 static void if_usb_free(struct if_usb_card *cardp);
  43 static int if_usb_submit_rx_urb(struct if_usb_card *cardp);
  44 static int if_usb_reset_device(struct if_usb_card *cardp);
  45
  46 /**
  47  *  if_usb_wrike_bulk_callback -  call back to handle URB status
  48  *
  49  *  @param urb          pointer to urb structure
  50  */
  51 static void if_usb_write_bulk_callback(struct urb *urb)
  52 {
  53         if (urb->status != 0)
  54                 printk(KERN_INFO "libertastf: URB in failure status: %d\n",
  55                        urb->status);
  56 }
  57
  58 /**
  59  *  if_usb_free - free tx/rx urb, skb and rx buffer
  60  *
  61  *  @param cardp        pointer if_usb_card
  62  */
  63 static void if_usb_free(struct if_usb_card *cardp)
  64 {
  65         /* Unlink tx & rx urb */
  66         usb_kill_urb(cardp->tx_urb);
  67         usb_kill_urb(cardp->rx_urb);
  68         usb_kill_urb(cardp->cmd_urb);
  69
  70         usb_free_urb(cardp->tx_urb);
  71         cardp->tx_urb = NULL;
  72
  73         usb_free_urb(cardp->rx_urb);
  74         cardp->rx_urb = NULL;
  75
  76         usb_free_urb(cardp->cmd_urb);
  77         cardp->cmd_urb = NULL;
  78
  79         kfree(cardp->ep_out_buf);
  80         cardp->ep_out_buf = NULL;
  81 }
  82
  83 static void if_usb_setup_firmware(struct lbtf_private *priv)
  84 {
  85         struct if_usb_card *cardp = priv->card;
  86         struct cmd_ds_set_boot2_ver b2_cmd;
  87
  88         if_usb_submit_rx_urb(cardp);
  89         b2_cmd.hdr.size = cpu_to_le16(sizeof(b2_cmd));
  90         b2_cmd.action = 0;
  91         b2_cmd.version = cardp->boot2_version;
  92
  93         if (lbtf_cmd_with_response(priv, CMD_SET_BOOT2_VER, &b2_cmd))
  94                 printk(KERN_INFO "libertastf: setting boot2 version failed\n");
  95 }
  96
  97 static void if_usb_fw_timeo(unsigned long priv)
  98 {
  99         struct if_usb_card *cardp = (void *)priv;
 100
 101         if (!cardp->fwdnldover)
 102                 /* Download timed out */
 103                 cardp->priv->surpriseremoved = 1;
 104         wake_up(&cardp->fw_wq);
 105 }
 106
 107 /**
 108  *  if_usb_probe - sets the configuration values
 109  *
 110  *  @ifnum      interface number
 111  *  @id         pointer to usb_device_id
 112  *
 113  *  Returns: 0 on success, error code on failure
 114  */
 115 static int if_usb_probe(struct usb_interface *intf,
 116                         const struct usb_device_id *id)
 117 {
 118         struct usb_device *udev;
 119         struct usb_host_interface *iface_desc;
 120         struct usb_endpoint_descriptor *endpoint;
 121         struct lbtf_private *priv;
 122         struct if_usb_card *cardp;
 123         int i;
 124
 125         udev = interface_to_usbdev(intf);
 126
 127         cardp = kzalloc(sizeof(struct if_usb_card), GFP_KERNEL);
 128         if (!cardp)
 129                 goto error;
 130
 131         setup_timer(&cardp->fw_timeout, if_usb_fw_timeo, (unsigned long)cardp);
 132         init_waitqueue_head(&cardp->fw_wq);
 133
 134         cardp->udev = udev;
 135         iface_desc = intf->cur_altsetting;
 136
 137         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 138                 endpoint = &iface_desc->endpoint[i].desc;
 139                 if (usb_endpoint_is_bulk_in(endpoint)) {
 140                         cardp->ep_in_size =
 141                                 le16_to_cpu(endpoint->wMaxPacketSize);
 142                         cardp->ep_in = usb_endpoint_num(endpoint);
 143                 } else if (usb_endpoint_is_bulk_out(endpoint)) {
 144                         cardp->ep_out_size =
 145                                 le16_to_cpu(endpoint->wMaxPacketSize);
 146                         cardp->ep_out = usb_endpoint_num(endpoint);
 147                 }
 148         }
 149         if (!cardp->ep_out_size || !cardp->ep_in_size)
 150                 /* Endpoints not found */
 151                 goto dealloc;
 152
 153         cardp->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 154         if (!cardp->rx_urb)
 155                 goto dealloc;
 156
 157         cardp->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 158         if (!cardp->tx_urb)
 159                 goto dealloc;
 160
 161         cardp->cmd_urb = usb_alloc_urb(0, GFP_KERNEL);
 162         if (!cardp->cmd_urb)
 163                 goto dealloc;
 164
 165         cardp->ep_out_buf = kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE,
 166                                     GFP_KERNEL);
 167         if (!cardp->ep_out_buf)
 168                 goto dealloc;
 169
 170         priv = lbtf_add_card(cardp, &udev->dev);
 171         if (!priv)
 172                 goto dealloc;
 173
 174         cardp->priv = priv;
 175
 176         priv->hw_host_to_card = if_usb_host_to_card;
 177         priv->hw_prog_firmware = if_usb_prog_firmware;
 178         priv->hw_reset_device = if_usb_reset_device;
 179         cardp->boot2_version = udev->descriptor.bcdDevice;
 180
 181         usb_get_dev(udev);
 182         usb_set_intfdata(intf, cardp);
 183
 184         return 0;
 185
 186 dealloc:
 187         if_usb_free(cardp);
 188 error:
 189         return -ENOMEM;
 190 }
 191
 192 /**
 193  *  if_usb_disconnect -  free resource and cleanup
 194  *
 195  *  @intf       USB interface structure
 196  */
 197 static void if_usb_disconnect(struct usb_interface *intf)
 198 {
 199         struct if_usb_card *cardp = usb_get_intfdata(intf);
 200         struct lbtf_private *priv = (struct lbtf_private *) cardp->priv;
 201
 202         if_usb_reset_device(cardp);
 203
 204         if (priv)
 205                 lbtf_remove_card(priv);
 206
 207         /* Unlink and free urb */
 208         if_usb_free(cardp);
 209
 210         usb_set_intfdata(intf, NULL);
 211         usb_put_dev(interface_to_usbdev(intf));
 212 }
 213
 214 /**
 215  *  if_usb_send_fw_pkt -  This function downloads the FW
 216  *
 217  *  @priv       pointer to struct lbtf_private
 218  *
 219  *  Returns: 0
 220  */
 221 static int if_usb_send_fw_pkt(struct if_usb_card *cardp)
 222 {
 223         struct fwdata *fwdata = cardp->ep_out_buf;
 224         u8 *firmware = (u8 *) cardp->fw->data;
 225
 226         /* If we got a CRC failure on the last block, back
 227            up and retry it */
 228         if (!cardp->CRC_OK) {
 229                 cardp->totalbytes = cardp->fwlastblksent;
 230                 cardp->fwseqnum--;
 231         }
 232
 233         /* struct fwdata (which we sent to the card) has an
 234            extra __le32 field in between the header and the data,
 235            which is not in the struct fwheader in the actual
 236            firmware binary. Insert the seqnum in the middle... */
 237         memcpy(&fwdata->hdr, &firmware[cardp->totalbytes],
 238                sizeof(struct fwheader));
 239
 240         cardp->fwlastblksent = cardp->totalbytes;
 241         cardp->totalbytes += sizeof(struct fwheader);
 242
 243         memcpy(fwdata->data, &firmware[cardp->totalbytes],
 244                le32_to_cpu(fwdata->hdr.datalength));
 245
 246         fwdata->seqnum = cpu_to_le32(++cardp->fwseqnum);
 247         cardp->totalbytes += le32_to_cpu(fwdata->hdr.datalength);
 248
 249         usb_tx_block(cardp, cardp->ep_out_buf, sizeof(struct fwdata) +
 250                      le32_to_cpu(fwdata->hdr.datalength), 0);
 251
 252         if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_LAST_BLOCK))
 253                 /* Host has finished FW downloading
 254                  * Donwloading FW JUMP BLOCK
 255                  */
 256                 cardp->fwfinalblk = 1;
 257
 258         return 0;
 259 }
 260
 261 static int if_usb_reset_device(struct if_usb_card *cardp)
 262 {
 263         struct cmd_ds_802_11_reset *cmd = cardp->ep_out_buf + 4;
 264         int ret;
 265
 266         *(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
 267
 268         cmd->hdr.command = cpu_to_le16(CMD_802_11_RESET);
 269         cmd->hdr.size = cpu_to_le16(sizeof(struct cmd_ds_802_11_reset));
 270         cmd->hdr.result = cpu_to_le16(0);
 271         cmd->hdr.seqnum = cpu_to_le16(0x5a5a);
 272         cmd->action = cpu_to_le16(CMD_ACT_HALT);
 273         usb_tx_block(cardp, cardp->ep_out_buf,
 274                      4 + sizeof(struct cmd_ds_802_11_reset), 0);
 275
 276         msleep(100);
 277         ret = usb_reset_device(cardp->udev);
 278         msleep(100);
 279
 280         return ret;
 281 }
 282 EXPORT_SYMBOL_GPL(if_usb_reset_device);
 283
 284 /**
 285  *  usb_tx_block - transfer data to the device
 286  *
 287  *  @priv       pointer to struct lbtf_private
 288  *  @payload    pointer to payload data
 289  *  @nb         data length
 290  *  @data       non-zero for data, zero for commands
 291  *
 292  *  Returns: 0 on success, nonzero otherwise.
 293  */
 294 static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload,
 295                         uint16_t nb, u8 data)
 296 {
 297         struct urb *urb;
 298
 299         /* check if device is removed */
 300         if (cardp->priv->surpriseremoved)
 301                 return -1;
 302
 303         if (data)
 304                 urb = cardp->tx_urb;
 305         else
 306                 urb = cardp->cmd_urb;
 307
 308         usb_fill_bulk_urb(urb, cardp->udev,
 309                           usb_sndbulkpipe(cardp->udev,
 310                                           cardp->ep_out),
 311                           payload, nb, if_usb_write_bulk_callback, cardp);
 312
 313         urb->transfer_flags |= URB_ZERO_PACKET;
 314
 315         if (usb_submit_urb(urb, GFP_ATOMIC))
 316                 return -1;
 317         return 0;
 318 }
 319
 320 static int __if_usb_submit_rx_urb(struct if_usb_card *cardp,
 321                                   void (*callbackfn)(struct urb *urb))
 322 {
 323         struct sk_buff *skb;
 324
 325         skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE);
 326         if (!skb)
 327                 return -1;
 328
 329         cardp->rx_skb = skb;
 330
 331         /* Fill the receive configuration URB and initialise the Rx call back */
 332         usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
 333                           usb_rcvbulkpipe(cardp->udev, cardp->ep_in),
 334                           skb_tail_pointer(skb),
 335                           MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn, cardp);
 336
 337         cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;
 338
 339         if (usb_submit_urb(cardp->rx_urb, GFP_ATOMIC)) {
 340                 kfree_skb(skb);
 341                 cardp->rx_skb = NULL;
 342                 return -1;
 343         } else
 344                 return 0;
 345 }
 346
 347 static int if_usb_submit_rx_urb_fwload(struct if_usb_card *cardp)
 348 {
 349         return __if_usb_submit_rx_urb(cardp, &if_usb_receive_fwload);
 350 }
 351
 352 static int if_usb_submit_rx_urb(struct if_usb_card *cardp)
 353 {
 354         return __if_usb_submit_rx_urb(cardp, &if_usb_receive);
 355 }
 356
 357 static void if_usb_receive_fwload(struct urb *urb)
 358 {
 359         struct if_usb_card *cardp = urb->context;
 360         struct sk_buff *skb = cardp->rx_skb;
 361         struct fwsyncheader *syncfwheader;
 362         struct bootcmdresp bcmdresp;
 363
 364         if (urb->status) {
 365                 kfree_skb(skb);
 366                 return;
 367         }
 368
 369         if (cardp->fwdnldover) {
 370                 __le32 *tmp = (__le32 *)(skb->data);
 371
 372                 if (tmp[0] == cpu_to_le32(CMD_TYPE_INDICATION) &&
 373                     tmp[1] == cpu_to_le32(MACREG_INT_CODE_FIRMWARE_READY))
 374                         /* Firmware ready event received */
 375                         wake_up(&cardp->fw_wq);
 376                 else
 377                         if_usb_submit_rx_urb_fwload(cardp);
 378                 kfree_skb(skb);
 379                 return;
 380         }
 381         if (cardp->bootcmdresp <= 0) {
 382                 memcpy(&bcmdresp, skb->data, sizeof(bcmdresp));
 383
 384                 if (le16_to_cpu(cardp->udev->descriptor.bcdDevice) < 0x3106) {
 385                         kfree_skb(skb);
 386                         if_usb_submit_rx_urb_fwload(cardp);
 387                         cardp->bootcmdresp = 1;
 388                         /* Received valid boot command response */
 389                         return;
 390                 }
 391                 if (bcmdresp.magic != cpu_to_le32(BOOT_CMD_MAGIC_NUMBER)) {
 392                         if (bcmdresp.magic == cpu_to_le32(CMD_TYPE_REQUEST) ||
 393                             bcmdresp.magic == cpu_to_le32(CMD_TYPE_DATA) ||
 394                             bcmdresp.magic == cpu_to_le32(CMD_TYPE_INDICATION))
 395                                 cardp->bootcmdresp = -1;
 396                 } else if (bcmdresp.cmd == BOOT_CMD_FW_BY_USB &&
 397                            bcmdresp.result == BOOT_CMD_RESP_OK)
 398                         cardp->bootcmdresp = 1;
 399
 400                 kfree_skb(skb);
 401                 if_usb_submit_rx_urb_fwload(cardp);
 402                 return;
 403         }
 404
 405         syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
 406         if (!syncfwheader) {
 407                 kfree_skb(skb);
 408                 return;
 409         }
 410
 411         memcpy(syncfwheader, skb->data, sizeof(struct fwsyncheader));
 412
 413         if (!syncfwheader->cmd)
 414                 cardp->CRC_OK = 1;
 415         else
 416                 cardp->CRC_OK = 0;
 417         kfree_skb(skb);
 418
 419         /* reschedule timer for 200ms hence */
 420         mod_timer(&cardp->fw_timeout, jiffies + (HZ/5));
 421
 422         if (cardp->fwfinalblk) {
 423                 cardp->fwdnldover = 1;
 424                 goto exit;
 425         }
 426
 427         if_usb_send_fw_pkt(cardp);
 428
 429  exit:
 430         if_usb_submit_rx_urb_fwload(cardp);
 431
 432         kfree(syncfwheader);
 433
 434         return;
 435 }
 436
 437 #define MRVDRV_MIN_PKT_LEN      30
 438
 439 static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
 440                                        struct if_usb_card *cardp,
 441                                        struct lbtf_private *priv)
 442 {
 443         if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + MESSAGE_HEADER_LEN
 444             || recvlength < MRVDRV_MIN_PKT_LEN) {
 445                 kfree_skb(skb);
 446                 return;
 447         }
 448
 449         skb_put(skb, recvlength);
 450         skb_pull(skb, MESSAGE_HEADER_LEN);
 451         lbtf_rx(priv, skb);
 452 }
 453
 454 static inline void process_cmdrequest(int recvlength, uint8_t *recvbuff,
 455                                       struct sk_buff *skb,
 456                                       struct if_usb_card *cardp,
 457                                       struct lbtf_private *priv)
 458 {
 459         if (recvlength > LBS_CMD_BUFFER_SIZE) {
 460                 kfree_skb(skb);
 461                 return;
 462         }
 463
 464         BUG_ON(!in_interrupt());
 465
 466         spin_lock(&priv->driver_lock);
 467         memcpy(priv->cmd_resp_buff, recvbuff + MESSAGE_HEADER_LEN,
 468                recvlength - MESSAGE_HEADER_LEN);
 469         kfree_skb(skb);
 470         lbtf_cmd_response_rx(priv);
 471         spin_unlock(&priv->driver_lock);
 472 }
 473
 474 /**
 475  *  if_usb_receive - read data received from the device.
 476  *
 477  *  @urb                pointer to struct urb
 478  */
 479 static void if_usb_receive(struct urb *urb)
 480 {
 481         struct if_usb_card *cardp = urb->context;
 482         struct sk_buff *skb = cardp->rx_skb;
 483         struct lbtf_private *priv = cardp->priv;
 484         int recvlength = urb->actual_length;
 485         uint8_t *recvbuff = NULL;
 486         uint32_t recvtype = 0;
 487         __le32 *pkt = (__le32 *) skb->data;
 488
 489         if (recvlength) {
 490                 if (urb->status) {
 491                         kfree_skb(skb);
 492                         goto setup_for_next;
 493                 }
 494
 495                 recvbuff = skb->data;
 496                 recvtype = le32_to_cpu(pkt[0]);
 497         } else if (urb->status) {
 498                 kfree_skb(skb);
 499                 return;
 500         }
 501
 502         switch (recvtype) {
 503         case CMD_TYPE_DATA:
 504                 process_cmdtypedata(recvlength, skb, cardp, priv);
 505                 break;
 506
 507         case CMD_TYPE_REQUEST:
 508                 process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
 509                 break;
 510
 511         case CMD_TYPE_INDICATION:
 512         {
 513                 /* Event cause handling */
 514                 u32 event_cause = le32_to_cpu(pkt[1]);
 515
 516                 /* Icky undocumented magic special case */
 517                 if (event_cause & 0xffff0000) {
 518                         u16 tmp;
 519                         u8 retrycnt;
 520                         u8 failure;
 521
 522                         tmp = event_cause >> 16;
 523                         retrycnt = tmp & 0x00ff;
 524                         failure = (tmp & 0xff00) >> 8;
 525                         lbtf_send_tx_feedback(priv, retrycnt, failure);
 526                 } else if (event_cause == LBTF_EVENT_BCN_SENT)
 527                         lbtf_bcn_sent(priv);
 528                 else
 529                         printk(KERN_DEBUG
 530                                "Unsupported notification %d received\n",
 531                                event_cause);
 532                 kfree_skb(skb);
 533                 break;
 534         }
 535         default:
 536                 printk(KERN_DEBUG "libertastf: unknown command type 0x%X\n",
 537                              recvtype);
 538                 kfree_skb(skb);
 539                 break;
 540         }
 541
 542 setup_for_next:
 543         if_usb_submit_rx_urb(cardp);
 544 }
 545
 546 /**
 547  *  if_usb_host_to_card -  Download data to the device
 548  *
 549  *  @priv               pointer to struct lbtf_private structure
 550  *  @type               type of data
 551  *  @buf                pointer to data buffer
 552  *  @len                number of bytes
 553  *
 554  *  Returns: 0 on success, nonzero otherwise
 555  */
 556 static int if_usb_host_to_card(struct lbtf_private *priv, uint8_t type,
 557                                uint8_t *payload, uint16_t nb)
 558 {
 559         struct if_usb_card *cardp = priv->card;
 560         u8 data = 0;
 561
 562         if (type == MVMS_CMD) {
 563                 *(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
 564         } else {
 565                 *(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_DATA);
 566                 data = 1;
 567         }
 568
 569         memcpy((cardp->ep_out_buf + MESSAGE_HEADER_LEN), payload, nb);
 570
 571         return usb_tx_block(cardp, cardp->ep_out_buf, nb + MESSAGE_HEADER_LEN,
 572                             data);
 573 }
 574
 575 /**
 576  *  if_usb_issue_boot_command - Issue boot command to Boot2.
 577  *
 578  *  @ivalue   1 boots from FW by USB-Download, 2 boots from FW in EEPROM.
 579  *
 580  *  Returns: 0
 581  */
 582 static int if_usb_issue_boot_command(struct if_usb_card *cardp, int ivalue)
 583 {
 584         struct bootcmd *bootcmd = cardp->ep_out_buf;
 585
 586         /* Prepare command */
 587         bootcmd->magic = cpu_to_le32(BOOT_CMD_MAGIC_NUMBER);
 588         bootcmd->cmd = ivalue;
 589         memset(bootcmd->pad, 0, sizeof(bootcmd->pad));
 590
 591         /* Issue command */
 592         usb_tx_block(cardp, cardp->ep_out_buf, sizeof(*bootcmd), 0);
 593
 594         return 0;
 595 }
 596
 597
 598 /**
 599  *  check_fwfile_format - Check the validity of Boot2/FW image.
 600  *
 601  *  @data       pointer to image
 602  *  @totlen     image length
 603  *
 604  *  Returns: 0 if the image is valid, nonzero otherwise.
 605  */
 606 static int check_fwfile_format(const u8 *data, u32 totlen)
 607 {
 608         u32 bincmd, exit;
 609         u32 blksize, offset, len;
 610         int ret;
 611
 612         ret = 1;
 613         exit = len = 0;
 614
 615         do {
 616                 struct fwheader *fwh = (void *) data;
 617
 618                 bincmd = le32_to_cpu(fwh->dnldcmd);
 619                 blksize = le32_to_cpu(fwh->datalength);
 620                 switch (bincmd) {
 621                 case FW_HAS_DATA_TO_RECV:
 622                         offset = sizeof(struct fwheader) + blksize;
 623                         data += offset;
 624                         len += offset;
 625                         if (len >= totlen)
 626                                 exit = 1;
 627                         break;
 628                 case FW_HAS_LAST_BLOCK:
 629                         exit = 1;
 630                         ret = 0;
 631                         break;
 632                 default:
 633                         exit = 1;
 634                         break;
 635                 }
 636         } while (!exit);
 637
 638         if (ret)
 639                 printk(KERN_INFO
 640                        "libertastf: firmware file format check failed\n");
 641         return ret;
 642 }
 643
 644
 645 static int if_usb_prog_firmware(struct if_usb_card *cardp)
 646 {
 647         int i = 0;
 648         static int reset_count = 10;
 649         int ret = 0;
 650
 651         ret = request_firmware(&cardp->fw, lbtf_fw_name, &cardp->udev->dev);
 652         if (ret < 0) {
 653                 printk(KERN_INFO "libertastf: firmware %s not found\n",
 654                        lbtf_fw_name);
 655                 goto done;
 656         }
 657
 658         if (check_fwfile_format(cardp->fw->data, cardp->fw->size))
 659                 goto release_fw;
 660
 661 restart:
 662         if (if_usb_submit_rx_urb_fwload(cardp) < 0) {
 663                 ret = -1;
 664                 goto release_fw;
 665         }
 666
 667         cardp->bootcmdresp = 0;
 668         do {
 669                 int j = 0;
 670                 i++;
 671                 /* Issue Boot command = 1, Boot from Download-FW */
 672                 if_usb_issue_boot_command(cardp, BOOT_CMD_FW_BY_USB);
 673                 /* wait for command response */
 674                 do {
 675                         j++;
 676                         msleep_interruptible(100);
 677                 } while (cardp->bootcmdresp == 0 && j < 10);
 678         } while (cardp->bootcmdresp == 0 && i < 5);
 679
 680         if (cardp->bootcmdresp <= 0) {
 681                 if (--reset_count >= 0) {
 682                         if_usb_reset_device(cardp);
 683                         goto restart;
 684                 }
 685                 return -1;
 686         }
 687
 688         i = 0;
 689
 690         cardp->totalbytes = 0;
 691         cardp->fwlastblksent = 0;
 692         cardp->CRC_OK = 1;
 693         cardp->fwdnldover = 0;
 694         cardp->fwseqnum = -1;
 695         cardp->totalbytes = 0;
 696         cardp->fwfinalblk = 0;
 697
 698         /* Send the first firmware packet... */
 699         if_usb_send_fw_pkt(cardp);
 700
 701         /* ... and wait for the process to complete */
 702         wait_event_interruptible(cardp->fw_wq, cardp->priv->surpriseremoved ||
 703                                                cardp->fwdnldover);
 704
 705         del_timer_sync(&cardp->fw_timeout);
 706         usb_kill_urb(cardp->rx_urb);
 707
 708         if (!cardp->fwdnldover) {
 709                 printk(KERN_INFO "libertastf: failed to load fw,"
 710                                  " resetting device!\n");
 711                 if (--reset_count >= 0) {
 712                         if_usb_reset_device(cardp);
 713                         goto restart;
 714                 }
 715
 716                 printk(KERN_INFO "libertastf: fw download failure\n");
 717                 ret = -1;
 718                 goto release_fw;
 719         }
 720
 721         cardp->priv->fw_ready = 1;
 722
 723  release_fw:
 724         release_firmware(cardp->fw);
 725         cardp->fw = NULL;
 726
 727         if_usb_setup_firmware(cardp->priv);
 728
 729  done:
 730         return ret;
 731 }
 732 EXPORT_SYMBOL_GPL(if_usb_prog_firmware);
 733
 734
 735 #define if_usb_suspend NULL
 736 #define if_usb_resume NULL
 737
 738 static struct usb_driver if_usb_driver = {
 739         .name = DRV_NAME,
 740         .probe = if_usb_probe,
 741         .disconnect = if_usb_disconnect,
 742         .id_table = if_usb_table,
 743         .suspend = if_usb_suspend,
 744         .resume = if_usb_resume,
 745 };
 746
 747 static int __init if_usb_init_module(void)
 748 {
 749         int ret = 0;
 750
 751         ret = usb_register(&if_usb_driver);
 752         return ret;
 753 }
 754
 755 static void __exit if_usb_exit_module(void)
 756 {
 757         usb_deregister(&if_usb_driver);
 758 }
 759
 760 module_init(if_usb_init_module);
 761 module_exit(if_usb_exit_module);
 762
 763 MODULE_DESCRIPTION("8388 USB WLAN Thinfirm Driver");
 764 MODULE_AUTHOR("Cozybit Inc.");
 765 MODULE_LICENSE("GPL");