drivers/net/wireless/libertas/if_usb.c

   1 /**
   2   * This file contains functions used in USB interface module.
   3   */
   4 #include <linux/delay.h>
   5 #include <linux/moduleparam.h>
   6 #include <linux/firmware.h>
   7 #include <linux/netdevice.h>
   8 #include <linux/list.h>
   9 #include <linux/usb.h>
  10
  11 #define DRV_NAME "usb8xxx"
  12
  13 #include "host.h"
  14 #include "decl.h"
  15 #include "defs.h"
  16 #include "dev.h"
  17 #include "if_usb.h"
  18 #include "decl.h"
  19
  20 #define MESSAGE_HEADER_LEN      4
  21
  22 static const char usbdriver_name[] = "usb8xxx";
  23 static u8 *default_fw_name = "usb8388.bin";
  24
  25 static char *libertas_fw_name = NULL;
  26 module_param_named(fw_name, libertas_fw_name, charp, 0644);
  27
  28 /*
  29  * We need to send a RESET command to all USB devices before
  30  * we tear down the USB connection. Otherwise we would not
  31  * be able to re-init device the device if the module gets
  32  * loaded again. This is a list of all initialized USB devices,
  33  * for the reset code see if_usb_reset_device()
  34 */
  35 static LIST_HEAD(usb_devices);
  36
  37 static struct usb_device_id if_usb_table[] = {
  38         /* Enter the device signature inside */
  39         { USB_DEVICE(0x1286, 0x2001) },
  40         { USB_DEVICE(0x05a3, 0x8388) },
  41         {}      /* Terminating entry */
  42 };
  43
  44 MODULE_DEVICE_TABLE(usb, if_usb_table);
  45
  46 static void if_usb_receive(struct urb *urb);
  47 static void if_usb_receive_fwload(struct urb *urb);
  48 static int if_usb_register_dev(wlan_private * priv);
  49 static int if_usb_unregister_dev(wlan_private *);
  50 static int if_usb_prog_firmware(wlan_private *);
  51 static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb);
  52 static int if_usb_get_int_status(wlan_private * priv, u8 *);
  53 static int if_usb_read_event_cause(wlan_private *);
  54 static int usb_tx_block(wlan_private *priv, u8 *payload, u16 nb);
  55 static void if_usb_free(struct usb_card_rec *cardp);
  56
  57 /**
  58  *  @brief  call back function to handle the status of the URB
  59  *  @param urb          pointer to urb structure
  60  *  @return             N/A
  61  */
  62 static void if_usb_write_bulk_callback(struct urb *urb)
  63 {
  64         wlan_private *priv = (wlan_private *) (urb->context);
  65         wlan_adapter *adapter = priv->adapter;
  66         struct net_device *dev = priv->dev;
  67
  68         /* handle the transmission complete validations */
  69
  70         if (urb->status != 0) {
  71                 /* print the failure status number for debug */
  72                 lbs_pr_info("URB in failure status: %d\n", urb->status);
  73         } else {
  74                 /*
  75                 lbs_deb_usbd(&urb->dev->dev, "URB status is successfull\n");
  76                 lbs_deb_usbd(&urb->dev->dev, "Actual length transmitted %d\n",
  77                        urb->actual_length);
  78                 */
  79                 priv->dnld_sent = DNLD_RES_RECEIVED;
  80                 /* Wake main thread if commands are pending */
  81                 if (!adapter->cur_cmd)
  82                         wake_up_interruptible(&priv->waitq);
  83                 if ((adapter->connect_status == LIBERTAS_CONNECTED)) {
  84                         netif_wake_queue(dev);
  85                         netif_wake_queue(priv->mesh_dev);
  86                 }
  87         }
  88
  89         return;
  90 }
  91
  92 /**
  93  *  @brief  free tx/rx urb, skb and rx buffer
  94  *  @param cardp        pointer usb_card_rec
  95  *  @return             N/A
  96  */
  97 static void if_usb_free(struct usb_card_rec *cardp)
  98 {
  99         lbs_deb_enter(LBS_DEB_USB);
 100
 101         /* Unlink tx & rx urb */
 102         usb_kill_urb(cardp->tx_urb);
 103         usb_kill_urb(cardp->rx_urb);
 104
 105         usb_free_urb(cardp->tx_urb);
 106         cardp->tx_urb = NULL;
 107
 108         usb_free_urb(cardp->rx_urb);
 109         cardp->rx_urb = NULL;
 110
 111         kfree(cardp->bulk_out_buffer);
 112         cardp->bulk_out_buffer = NULL;
 113
 114         lbs_deb_leave(LBS_DEB_USB);
 115 }
 116
 117 /**
 118  *  @brief sets the configuration values
 119  *  @param ifnum        interface number
 120  *  @param id           pointer to usb_device_id
 121  *  @return             0 on success, error code on failure
 122  */
 123 static int if_usb_probe(struct usb_interface *intf,
 124                         const struct usb_device_id *id)
 125 {
 126         struct usb_device *udev;
 127         struct usb_host_interface *iface_desc;
 128         struct usb_endpoint_descriptor *endpoint;
 129         wlan_private *priv;
 130         struct usb_card_rec *cardp;
 131         int i;
 132
 133         udev = interface_to_usbdev(intf);
 134
 135         cardp = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
 136         if (!cardp) {
 137                 lbs_pr_err("Out of memory allocating private data.\n");
 138                 goto error;
 139         }
 140
 141         cardp->udev = udev;
 142         iface_desc = intf->cur_altsetting;
 143
 144         lbs_deb_usbd(&udev->dev, "bcdUSB = 0x%X bDeviceClass = 0x%X"
 145                " bDeviceSubClass = 0x%X, bDeviceProtocol = 0x%X\n",
 146                      le16_to_cpu(udev->descriptor.bcdUSB),
 147                      udev->descriptor.bDeviceClass,
 148                      udev->descriptor.bDeviceSubClass,
 149                      udev->descriptor.bDeviceProtocol);
 150
 151         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 152                 endpoint = &iface_desc->endpoint[i].desc;
 153                 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
 154                     && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 155                         USB_ENDPOINT_XFER_BULK)) {
 156                         /* we found a bulk in endpoint */
 157                         lbs_deb_usbd(&udev->dev, "Bulk in size is %d\n",
 158                                      le16_to_cpu(endpoint->wMaxPacketSize));
 159                         if (!(cardp->rx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
 160                                 lbs_deb_usbd(&udev->dev,
 161                                        "Rx URB allocation failed\n");
 162                                 goto dealloc;
 163                         }
 164                         cardp->rx_urb_recall = 0;
 165
 166                         cardp->bulk_in_size =
 167                                 le16_to_cpu(endpoint->wMaxPacketSize);
 168                         cardp->bulk_in_endpointAddr =
 169                             (endpoint->
 170                              bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 171                         lbs_deb_usbd(&udev->dev, "in_endpoint = %d\n",
 172                                endpoint->bEndpointAddress);
 173                 }
 174
 175                 if (((endpoint->
 176                       bEndpointAddress & USB_ENDPOINT_DIR_MASK) ==
 177                      USB_DIR_OUT)
 178                     && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 179                         USB_ENDPOINT_XFER_BULK)) {
 180                         /* We found bulk out endpoint */
 181                         if (!(cardp->tx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
 182                                 lbs_deb_usbd(&udev->dev,
 183                                        "Tx URB allocation failed\n");
 184                                 goto dealloc;
 185                         }
 186
 187                         cardp->bulk_out_size =
 188                                 le16_to_cpu(endpoint->wMaxPacketSize);
 189                         lbs_deb_usbd(&udev->dev,
 190                                      "Bulk out size is %d\n",
 191                                      le16_to_cpu(endpoint->wMaxPacketSize));
 192                         cardp->bulk_out_endpointAddr =
 193                             endpoint->bEndpointAddress;
 194                         lbs_deb_usbd(&udev->dev, "out_endpoint = %d\n",
 195                                     endpoint->bEndpointAddress);
 196                         cardp->bulk_out_buffer =
 197                             kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE,
 198                                     GFP_KERNEL);
 199
 200                         if (!cardp->bulk_out_buffer) {
 201                                 lbs_deb_usbd(&udev->dev,
 202                                        "Could not allocate buffer\n");
 203                                 goto dealloc;
 204                         }
 205                 }
 206         }
 207
 208         if (!(priv = libertas_add_card(cardp, &udev->dev)))
 209                 goto dealloc;
 210
 211         if (libertas_add_mesh(priv, &udev->dev))
 212                 goto err_add_mesh;
 213
 214         priv->hw_register_dev = if_usb_register_dev;
 215         priv->hw_unregister_dev = if_usb_unregister_dev;
 216         priv->hw_prog_firmware = if_usb_prog_firmware;
 217         priv->hw_host_to_card = if_usb_host_to_card;
 218         priv->hw_get_int_status = if_usb_get_int_status;
 219         priv->hw_read_event_cause = if_usb_read_event_cause;
 220
 221         if (libertas_activate_card(priv))
 222                 goto err_activate_card;
 223
 224         list_add_tail(&cardp->list, &usb_devices);
 225
 226         usb_get_dev(udev);
 227         usb_set_intfdata(intf, cardp);
 228
 229         return 0;
 230
 231 err_activate_card:
 232         libertas_remove_mesh(priv);
 233 err_add_mesh:
 234         free_netdev(priv->dev);
 235         kfree(priv->adapter);
 236 dealloc:
 237         if_usb_free(cardp);
 238
 239 error:
 240         return -ENOMEM;
 241 }
 242
 243 /**
 244  *  @brief free resource and cleanup
 245  *  @param intf         USB interface structure
 246  *  @return             N/A
 247  */
 248 static void if_usb_disconnect(struct usb_interface *intf)
 249 {
 250         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 251         wlan_private *priv = (wlan_private *) cardp->priv;
 252         wlan_adapter *adapter = NULL;
 253
 254         adapter = priv->adapter;
 255
 256         /*
 257          * Update Surprise removed to TRUE
 258          */
 259         adapter->surpriseremoved = 1;
 260
 261         list_del(&cardp->list);
 262
 263         /* card is removed and we can call wlan_remove_card */
 264         lbs_deb_usbd(&cardp->udev->dev, "call remove card\n");
 265         libertas_remove_mesh(priv);
 266         libertas_remove_card(priv);
 267
 268         /* Unlink and free urb */
 269         if_usb_free(cardp);
 270
 271         usb_set_intfdata(intf, NULL);
 272         usb_put_dev(interface_to_usbdev(intf));
 273
 274         return;
 275 }
 276
 277 /**
 278  *  @brief  This function download FW
 279  *  @param priv         pointer to wlan_private
 280  *  @return             0
 281  */
 282 static int if_prog_firmware(wlan_private * priv)
 283 {
 284         struct usb_card_rec *cardp = priv->card;
 285         struct FWData *fwdata;
 286         struct fwheader *fwheader;
 287         u8 *firmware = priv->firmware->data;
 288
 289         fwdata = kmalloc(sizeof(struct FWData), GFP_ATOMIC);
 290
 291         if (!fwdata)
 292                 return -1;
 293
 294         fwheader = &fwdata->fwheader;
 295
 296         if (!cardp->CRC_OK) {
 297                 cardp->totalbytes = cardp->fwlastblksent;
 298                 cardp->fwseqnum = cardp->lastseqnum - 1;
 299         }
 300
 301         /*
 302         lbs_deb_usbd(&cardp->udev->dev, "totalbytes = %d\n",
 303                     cardp->totalbytes);
 304         */
 305
 306         memcpy(fwheader, &firmware[cardp->totalbytes],
 307                sizeof(struct fwheader));
 308
 309         cardp->fwlastblksent = cardp->totalbytes;
 310         cardp->totalbytes += sizeof(struct fwheader);
 311
 312         /* lbs_deb_usbd(&cardp->udev->dev,"Copy Data\n"); */
 313         memcpy(fwdata->data, &firmware[cardp->totalbytes],
 314                le32_to_cpu(fwdata->fwheader.datalength));
 315
 316         /*
 317         lbs_deb_usbd(&cardp->udev->dev,
 318                     "Data length = %d\n", le32_to_cpu(fwdata->fwheader.datalength));
 319         */
 320
 321         cardp->fwseqnum = cardp->fwseqnum + 1;
 322
 323         fwdata->seqnum = cpu_to_le32(cardp->fwseqnum);
 324         cardp->lastseqnum = cardp->fwseqnum;
 325         cardp->totalbytes += le32_to_cpu(fwdata->fwheader.datalength);
 326
 327         if (fwheader->dnldcmd == cpu_to_le32(FW_HAS_DATA_TO_RECV)) {
 328                 /*
 329                 lbs_deb_usbd(&cardp->udev->dev, "There are data to follow\n");
 330                 lbs_deb_usbd(&cardp->udev->dev,
 331                             "seqnum = %d totalbytes = %d\n", cardp->fwseqnum,
 332                             cardp->totalbytes);
 333                 */
 334                 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
 335                 usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
 336
 337         } else if (fwdata->fwheader.dnldcmd == cpu_to_le32(FW_HAS_LAST_BLOCK)) {
 338                 /*
 339                 lbs_deb_usbd(&cardp->udev->dev,
 340                             "Host has finished FW downloading\n");
 341                 lbs_deb_usbd(&cardp->udev->dev,
 342                             "Donwloading FW JUMP BLOCK\n");
 343                 */
 344                 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
 345                 usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
 346                 cardp->fwfinalblk = 1;
 347         }
 348
 349         /*
 350         lbs_deb_usbd(&cardp->udev->dev,
 351                     "The firmware download is done size is %d\n",
 352                     cardp->totalbytes);
 353         */
 354
 355         kfree(fwdata);
 356
 357         return 0;
 358 }
 359
 360 static int if_usb_reset_device(wlan_private *priv)
 361 {
 362         int ret;
 363         struct usb_card_rec *cardp = priv->card;
 364
 365         lbs_deb_enter(LBS_DEB_USB);
 366
 367         /* Try a USB port reset first, if that fails send the reset
 368          * command to the firmware.
 369          */
 370         ret = usb_reset_device(cardp->udev);
 371         if (!ret) {
 372                 msleep(10);
 373                 ret = libertas_reset_device(priv);
 374                 msleep(10);
 375         }
 376
 377         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 378
 379         return ret;
 380 }
 381
 382 /**
 383  *  @brief This function transfer the data to the device.
 384  *  @param priv         pointer to wlan_private
 385  *  @param payload      pointer to payload data
 386  *  @param nb           data length
 387  *  @return             0 or -1
 388  */
 389 static int usb_tx_block(wlan_private * priv, u8 * payload, u16 nb)
 390 {
 391         /* pointer to card structure */
 392         struct usb_card_rec *cardp = priv->card;
 393         int ret = -1;
 394
 395         /* check if device is removed */
 396         if (priv->adapter->surpriseremoved) {
 397                 lbs_deb_usbd(&cardp->udev->dev, "Device removed\n");
 398                 goto tx_ret;
 399         }
 400
 401         usb_fill_bulk_urb(cardp->tx_urb, cardp->udev,
 402                           usb_sndbulkpipe(cardp->udev,
 403                                           cardp->bulk_out_endpointAddr),
 404                           payload, nb, if_usb_write_bulk_callback, priv);
 405
 406         cardp->tx_urb->transfer_flags |= URB_ZERO_PACKET;
 407
 408         if ((ret = usb_submit_urb(cardp->tx_urb, GFP_ATOMIC))) {
 409                 /*  transfer failed */
 410                 lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb failed\n");
 411                 ret = -1;
 412         } else {
 413                 /* lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb success\n"); */
 414                 ret = 0;
 415         }
 416
 417 tx_ret:
 418         return ret;
 419 }
 420
 421 static int __if_usb_submit_rx_urb(wlan_private * priv,
 422                                   void (*callbackfn)
 423                                   (struct urb *urb))
 424 {
 425         struct usb_card_rec *cardp = priv->card;
 426         struct sk_buff *skb;
 427         struct read_cb_info *rinfo = &cardp->rinfo;
 428         int ret = -1;
 429
 430         if (!(skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE))) {
 431                 lbs_pr_err("No free skb\n");
 432                 goto rx_ret;
 433         }
 434
 435         rinfo->skb = skb;
 436
 437         /* Fill the receive configuration URB and initialise the Rx call back */
 438         usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
 439                           usb_rcvbulkpipe(cardp->udev,
 440                                           cardp->bulk_in_endpointAddr),
 441                           (void *) (skb->tail + (size_t) IPFIELD_ALIGN_OFFSET),
 442                           MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn,
 443                           rinfo);
 444
 445         cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;
 446
 447         /* lbs_deb_usbd(&cardp->udev->dev, "Pointer for rx_urb %p\n", cardp->rx_urb); */
 448         if ((ret = usb_submit_urb(cardp->rx_urb, GFP_ATOMIC))) {
 449                 /* handle failure conditions */
 450                 lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB failed\n");
 451                 ret = -1;
 452         } else {
 453                 /* lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB success\n"); */
 454                 ret = 0;
 455         }
 456
 457 rx_ret:
 458         return ret;
 459 }
 460
 461 static inline int if_usb_submit_rx_urb_fwload(wlan_private * priv)
 462 {
 463         return __if_usb_submit_rx_urb(priv, &if_usb_receive_fwload);
 464 }
 465
 466 static inline int if_usb_submit_rx_urb(wlan_private * priv)
 467 {
 468         return __if_usb_submit_rx_urb(priv, &if_usb_receive);
 469 }
 470
 471 static void if_usb_receive_fwload(struct urb *urb)
 472 {
 473         struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
 474         wlan_private *priv = rinfo->priv;
 475         struct sk_buff *skb = rinfo->skb;
 476         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
 477         struct fwsyncheader *syncfwheader;
 478         struct bootcmdrespStr bootcmdresp;
 479
 480         if (urb->status) {
 481                 lbs_deb_usbd(&cardp->udev->dev,
 482                             "URB status is failed during fw load\n");
 483                 kfree_skb(skb);
 484                 return;
 485         }
 486
 487         if (cardp->bootcmdresp == 0) {
 488                 memcpy (&bootcmdresp, skb->data + IPFIELD_ALIGN_OFFSET,
 489                         sizeof(bootcmdresp));
 490                 if (le16_to_cpu(cardp->udev->descriptor.bcdDevice) < 0x3106) {
 491                         kfree_skb(skb);
 492                         if_usb_submit_rx_urb_fwload(priv);
 493                         cardp->bootcmdresp = 1;
 494                         lbs_deb_usbd(&cardp->udev->dev,
 495                                     "Received valid boot command response\n");
 496                         return;
 497                 }
 498                 if (bootcmdresp.u32magicnumber != cpu_to_le32(BOOT_CMD_MAGIC_NUMBER)) {
 499                         lbs_pr_info(
 500                                 "boot cmd response wrong magic number (0x%x)\n",
 501                                 le32_to_cpu(bootcmdresp.u32magicnumber));
 502                 } else if (bootcmdresp.u8cmd_tag != BOOT_CMD_FW_BY_USB) {
 503                         lbs_pr_info(
 504                                 "boot cmd response cmd_tag error (%d)\n",
 505                                 bootcmdresp.u8cmd_tag);
 506                 } else if (bootcmdresp.u8result != BOOT_CMD_RESP_OK) {
 507                         lbs_pr_info(
 508                                 "boot cmd response result error (%d)\n",
 509                                 bootcmdresp.u8result);
 510                 } else {
 511                         cardp->bootcmdresp = 1;
 512                         lbs_deb_usbd(&cardp->udev->dev,
 513                                     "Received valid boot command response\n");
 514                 }
 515                 kfree_skb(skb);
 516                 if_usb_submit_rx_urb_fwload(priv);
 517                 return;
 518         }
 519
 520         syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
 521         if (!syncfwheader) {
 522                 lbs_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
 523                 kfree_skb(skb);
 524                 return;
 525         }
 526
 527         memcpy(syncfwheader, skb->data + IPFIELD_ALIGN_OFFSET,
 528                         sizeof(struct fwsyncheader));
 529
 530         if (!syncfwheader->cmd) {
 531                 /*
 532                 lbs_deb_usbd(&cardp->udev->dev,
 533                             "FW received Blk with correct CRC\n");
 534                 lbs_deb_usbd(&cardp->udev->dev,
 535                             "FW received Blk seqnum = %d\n",
 536                        syncfwheader->seqnum);
 537                 */
 538                 cardp->CRC_OK = 1;
 539         } else {
 540                 lbs_deb_usbd(&cardp->udev->dev,
 541                             "FW received Blk with CRC error\n");
 542                 cardp->CRC_OK = 0;
 543         }
 544
 545         kfree_skb(skb);
 546
 547         if (cardp->fwfinalblk) {
 548                 cardp->fwdnldover = 1;
 549                 goto exit;
 550         }
 551
 552         if_prog_firmware(priv);
 553
 554         if_usb_submit_rx_urb_fwload(priv);
 555 exit:
 556         kfree(syncfwheader);
 557
 558         return;
 559
 560 }
 561
 562 #define MRVDRV_MIN_PKT_LEN      30
 563
 564 static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
 565                                        struct usb_card_rec *cardp,
 566                                        wlan_private *priv)
 567 {
 568         if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE +
 569             MESSAGE_HEADER_LEN || recvlength < MRVDRV_MIN_PKT_LEN) {
 570                 lbs_deb_usbd(&cardp->udev->dev,
 571                             "Packet length is Invalid\n");
 572                 kfree_skb(skb);
 573                 return;
 574         }
 575
 576         skb_reserve(skb, IPFIELD_ALIGN_OFFSET);
 577         skb_put(skb, recvlength);
 578         skb_pull(skb, MESSAGE_HEADER_LEN);
 579         libertas_process_rxed_packet(priv, skb);
 580         priv->upld_len = (recvlength - MESSAGE_HEADER_LEN);
 581 }
 582
 583 static inline void process_cmdrequest(int recvlength, u8 *recvbuff,
 584                                       struct sk_buff *skb,
 585                                       struct usb_card_rec *cardp,
 586                                       wlan_private *priv)
 587 {
 588         u8 *cmdbuf;
 589         if (recvlength > MRVDRV_SIZE_OF_CMD_BUFFER) {
 590                 lbs_deb_usbd(&cardp->udev->dev,
 591                             "The receive buffer is too large\n");
 592                 kfree_skb(skb);
 593                 return;
 594         }
 595
 596         if (!in_interrupt())
 597                 BUG();
 598
 599         spin_lock(&priv->adapter->driver_lock);
 600         /* take care of cur_cmd = NULL case by reading the
 601          * data to clear the interrupt */
 602         if (!priv->adapter->cur_cmd) {
 603                 cmdbuf = priv->upld_buf;
 604                 priv->adapter->hisregcpy &= ~his_cmdupldrdy;
 605         } else
 606                 cmdbuf = priv->adapter->cur_cmd->bufvirtualaddr;
 607
 608         cardp->usb_int_cause |= his_cmdupldrdy;
 609         priv->upld_len = (recvlength - MESSAGE_HEADER_LEN);
 610         memcpy(cmdbuf, recvbuff + MESSAGE_HEADER_LEN,
 611                priv->upld_len);
 612
 613         kfree_skb(skb);
 614         libertas_interrupt(priv->dev);
 615         spin_unlock(&priv->adapter->driver_lock);
 616
 617         lbs_deb_usbd(&cardp->udev->dev,
 618                     "Wake up main thread to handle cmd response\n");
 619
 620         return;
 621 }
 622
 623 /**
 624  *  @brief This function reads of the packet into the upload buff,
 625  *  wake up the main thread and initialise the Rx callack.
 626  *
 627  *  @param urb          pointer to struct urb
 628  *  @return             N/A
 629  */
 630 static void if_usb_receive(struct urb *urb)
 631 {
 632         struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
 633         wlan_private *priv = rinfo->priv;
 634         struct sk_buff *skb = rinfo->skb;
 635         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
 636
 637         int recvlength = urb->actual_length;
 638         u8 *recvbuff = NULL;
 639         u32 recvtype;
 640
 641         lbs_deb_enter(LBS_DEB_USB);
 642
 643         if (recvlength) {
 644                 if (urb->status) {
 645                         lbs_deb_usbd(&cardp->udev->dev,
 646                                     "URB status is failed\n");
 647                         kfree_skb(skb);
 648                         goto setup_for_next;
 649                 }
 650
 651                 recvbuff = skb->data + IPFIELD_ALIGN_OFFSET;
 652                 memcpy(&recvtype, recvbuff, sizeof(u32));
 653                 lbs_deb_usbd(&cardp->udev->dev,
 654                             "Recv length = 0x%x\n", recvlength);
 655                 lbs_deb_usbd(&cardp->udev->dev,
 656                             "Receive type = 0x%X\n", recvtype);
 657                 recvtype = le32_to_cpu(recvtype);
 658                 lbs_deb_usbd(&cardp->udev->dev,
 659                             "Receive type after = 0x%X\n", recvtype);
 660         } else if (urb->status)
 661                 goto rx_exit;
 662
 663
 664         switch (recvtype) {
 665         case CMD_TYPE_DATA:
 666                 process_cmdtypedata(recvlength, skb, cardp, priv);
 667                 break;
 668
 669         case CMD_TYPE_REQUEST:
 670                 process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
 671                 break;
 672
 673         case CMD_TYPE_INDICATION:
 674                 /* Event cause handling */
 675                 spin_lock(&priv->adapter->driver_lock);
 676                 cardp->usb_event_cause = le32_to_cpu(*(__le32 *) (recvbuff + MESSAGE_HEADER_LEN));
 677                 lbs_deb_usbd(&cardp->udev->dev,"**EVENT** 0x%X\n",
 678                             cardp->usb_event_cause);
 679                 if (cardp->usb_event_cause & 0xffff0000) {
 680                         libertas_send_tx_feedback(priv);
 681                         spin_unlock(&priv->adapter->driver_lock);
 682                         break;
 683                 }
 684                 cardp->usb_event_cause <<= 3;
 685                 cardp->usb_int_cause |= his_cardevent;
 686                 kfree_skb(skb);
 687                 libertas_interrupt(priv->dev);
 688                 spin_unlock(&priv->adapter->driver_lock);
 689                 goto rx_exit;
 690         default:
 691                 kfree_skb(skb);
 692                 break;
 693         }
 694
 695 setup_for_next:
 696         if_usb_submit_rx_urb(priv);
 697 rx_exit:
 698         lbs_deb_leave(LBS_DEB_USB);
 699 }
 700
 701 /**
 702  *  @brief This function downloads data to FW
 703  *  @param priv         pointer to wlan_private structure
 704  *  @param type         type of data
 705  *  @param buf          pointer to data buffer
 706  *  @param len          number of bytes
 707  *  @return             0 or -1
 708  */
 709 static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb)
 710 {
 711         int ret = -1;
 712         u32 tmp;
 713         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
 714
 715         lbs_deb_usbd(&cardp->udev->dev,"*** type = %u\n", type);
 716         lbs_deb_usbd(&cardp->udev->dev,"size after = %d\n", nb);
 717
 718         if (type == MVMS_CMD) {
 719                 tmp = cpu_to_le32(CMD_TYPE_REQUEST);
 720                 priv->dnld_sent = DNLD_CMD_SENT;
 721                 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
 722                        MESSAGE_HEADER_LEN);
 723
 724         } else {
 725                 tmp = cpu_to_le32(CMD_TYPE_DATA);
 726                 priv->dnld_sent = DNLD_DATA_SENT;
 727                 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
 728                        MESSAGE_HEADER_LEN);
 729         }
 730
 731         memcpy((cardp->bulk_out_buffer + MESSAGE_HEADER_LEN), payload, nb);
 732
 733         ret =
 734             usb_tx_block(priv, cardp->bulk_out_buffer, nb + MESSAGE_HEADER_LEN);
 735
 736         return ret;
 737 }
 738
 739 /* called with adapter->driver_lock held */
 740 static int if_usb_get_int_status(wlan_private * priv, u8 * ireg)
 741 {
 742         struct usb_card_rec *cardp = priv->card;
 743
 744         *ireg = cardp->usb_int_cause;
 745         cardp->usb_int_cause = 0;
 746
 747         lbs_deb_usbd(&cardp->udev->dev,"Int cause is 0x%X\n", *ireg);
 748
 749         return 0;
 750 }
 751
 752 static int if_usb_read_event_cause(wlan_private * priv)
 753 {
 754         struct usb_card_rec *cardp = priv->card;
 755         priv->adapter->eventcause = cardp->usb_event_cause;
 756         /* Re-submit rx urb here to avoid event lost issue */
 757         if_usb_submit_rx_urb(priv);
 758         return 0;
 759 }
 760
 761 static int if_usb_unregister_dev(wlan_private * priv)
 762 {
 763         int ret = 0;
 764
 765         /* Need to send a Reset command to device before USB resources freed
 766          * and wlan_remove_card() called, then device can handle FW download
 767          * again.
 768          */
 769         if (priv)
 770                 libertas_reset_device(priv);
 771
 772         return ret;
 773 }
 774
 775
 776 /**
 777  *  @brief  This function register usb device and initialize parameter
 778  *  @param              priv pointer to wlan_private
 779  *  @return             0 or -1
 780  */
 781 static int if_usb_register_dev(wlan_private * priv)
 782 {
 783         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
 784
 785         lbs_deb_enter(LBS_DEB_USB);
 786
 787         cardp->priv = priv;
 788         cardp->eth_dev = priv->dev;
 789         priv->hotplug_device = &(cardp->udev->dev);
 790
 791         lbs_deb_usbd(&cardp->udev->dev, "udev pointer is at %p\n",
 792                     cardp->udev);
 793
 794         lbs_deb_leave(LBS_DEB_USB);
 795         return 0;
 796 }
 797
 798 /**
 799  *  @brief This function issues Boot command to the Boot2 code
 800  *  @param ivalue   1:Boot from FW by USB-Download
 801  *                  2:Boot from FW in EEPROM
 802  *  @return             0
 803  */
 804 static int if_usb_issue_boot_command(wlan_private *priv, int ivalue)
 805 {
 806         struct usb_card_rec     *cardp = priv->card;
 807         struct bootcmdstr       sbootcmd;
 808         int i;
 809
 810         /* Prepare command */
 811         sbootcmd.u32magicnumber = cpu_to_le32(BOOT_CMD_MAGIC_NUMBER);
 812         sbootcmd.u8cmd_tag = ivalue;
 813         for (i=0; i<11; i++)
 814                 sbootcmd.au8dumy[i]=0x00;
 815         memcpy(cardp->bulk_out_buffer, &sbootcmd, sizeof(struct bootcmdstr));
 816
 817         /* Issue command */
 818         usb_tx_block(priv, cardp->bulk_out_buffer, sizeof(struct bootcmdstr));
 819
 820         return 0;
 821 }
 822
 823
 824 static int if_usb_do_prog_firmware(wlan_private * priv)
 825 {
 826         struct usb_card_rec *cardp = priv->card;
 827         int i = 0;
 828         static int reset_count = 10;
 829         int ret = 0;
 830
 831         lbs_deb_enter(LBS_DEB_USB);
 832
 833         cardp->rinfo.priv = priv;
 834
 835 restart:
 836         if (if_usb_submit_rx_urb_fwload(priv) < 0) {
 837                 lbs_deb_usbd(&cardp->udev->dev, "URB submission is failed\n");
 838                 ret = -1;
 839                 goto done;
 840         }
 841
 842         cardp->bootcmdresp = 0;
 843         do {
 844                 int j = 0;
 845                 i++;
 846                 /* Issue Boot command = 1, Boot from Download-FW */
 847                 if_usb_issue_boot_command(priv, BOOT_CMD_FW_BY_USB);
 848                 /* wait for command response */
 849                 do {
 850                         j++;
 851                         msleep_interruptible(100);
 852                 } while (cardp->bootcmdresp == 0 && j < 10);
 853         } while (cardp->bootcmdresp == 0 && i < 5);
 854
 855         if (cardp->bootcmdresp == 0) {
 856                 if (--reset_count >= 0) {
 857                         if_usb_reset_device(priv);
 858                         goto restart;
 859                 }
 860                 return -1;
 861         }
 862
 863         i = 0;
 864         priv->adapter->fw_ready = 0;
 865
 866         cardp->totalbytes = 0;
 867         cardp->fwlastblksent = 0;
 868         cardp->CRC_OK = 1;
 869         cardp->fwdnldover = 0;
 870         cardp->fwseqnum = -1;
 871         cardp->totalbytes = 0;
 872         cardp->fwfinalblk = 0;
 873
 874         if_prog_firmware(priv);
 875
 876         do {
 877                 lbs_deb_usbd(&cardp->udev->dev,"Wlan sched timeout\n");
 878                 i++;
 879                 msleep_interruptible(100);
 880                 if (priv->adapter->surpriseremoved || i >= 20)
 881                         break;
 882         } while (!cardp->fwdnldover);
 883
 884         if (!cardp->fwdnldover) {
 885                 lbs_pr_info("failed to load fw, resetting device!\n");
 886                 if (--reset_count >= 0) {
 887                         if_usb_reset_device(priv);
 888                         goto restart;
 889                 }
 890
 891                 lbs_pr_info("FW download failure, time = %d ms\n", i * 100);
 892                 ret = -1;
 893                 goto done;
 894         }
 895
 896         if_usb_submit_rx_urb(priv);
 897
 898         /* Delay 200 ms to waiting for the FW ready */
 899         msleep_interruptible(200);
 900
 901         priv->adapter->fw_ready = 1;
 902
 903 done:
 904         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 905         return ret;
 906 }
 907
 908 /**
 909  *  @brief This function checks the validity of Boot2/FW image.
 910  *
 911  *  @param data              pointer to image
 912  *         len               image length
 913  *  @return     0 or -1
 914  */
 915 static int check_fwfile_format(u8 *data, u32 totlen)
 916 {
 917         u32 bincmd, exit;
 918         u32 blksize, offset, len;
 919         int ret;
 920
 921         ret = 1;
 922         exit = len = 0;
 923
 924         do {
 925                 struct fwheader *fwh = (void *)data;
 926
 927                 bincmd = le32_to_cpu(fwh->dnldcmd);
 928                 blksize = le32_to_cpu(fwh->datalength);
 929                 switch (bincmd) {
 930                 case FW_HAS_DATA_TO_RECV:
 931                         offset = sizeof(struct fwheader) + blksize;
 932                         data += offset;
 933                         len += offset;
 934                         if (len >= totlen)
 935                                 exit = 1;
 936                         break;
 937                 case FW_HAS_LAST_BLOCK:
 938                         exit = 1;
 939                         ret = 0;
 940                         break;
 941                 default:
 942                         exit = 1;
 943                         break;
 944                 }
 945         } while (!exit);
 946
 947         if (ret)
 948                 lbs_pr_err("firmware file format check FAIL\n");
 949         else
 950                 lbs_deb_fw("firmware file format check PASS\n");
 951
 952         return ret;
 953 }
 954
 955
 956 static int if_usb_prog_firmware(wlan_private *priv)
 957 {
 958         int ret = -1;
 959
 960         lbs_deb_enter(LBS_DEB_FW);
 961
 962         if ((ret = request_firmware(&priv->firmware, libertas_fw_name,
 963                                     priv->hotplug_device)) < 0) {
 964                 lbs_pr_err("request_firmware() failed with %#x\n", ret);
 965                 lbs_pr_err("firmware %s not found\n", libertas_fw_name);
 966                 goto done;
 967         }
 968
 969         if (check_fwfile_format(priv->firmware->data, priv->firmware->size)) {
 970                 release_firmware(priv->firmware);
 971                 goto done;
 972         }
 973
 974         ret = if_usb_do_prog_firmware(priv);
 975
 976         release_firmware(priv->firmware);
 977 done:
 978         return ret;
 979 }
 980
 981
 982 #ifdef CONFIG_PM
 983 static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)
 984 {
 985         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 986         wlan_private *priv = cardp->priv;
 987
 988         lbs_deb_enter(LBS_DEB_USB);
 989
 990         if (priv->adapter->psstate != PS_STATE_FULL_POWER)
 991                 return -1;
 992
 993         netif_device_detach(cardp->eth_dev);
 994         netif_device_detach(priv->mesh_dev);
 995
 996         /* Unlink tx & rx urb */
 997         usb_kill_urb(cardp->tx_urb);
 998         usb_kill_urb(cardp->rx_urb);
 999
1000         cardp->rx_urb_recall = 1;
1001
1002         lbs_deb_leave(LBS_DEB_USB);
1003         return 0;
1004 }
1005
1006 static int if_usb_resume(struct usb_interface *intf)
1007 {
1008         struct usb_card_rec *cardp = usb_get_intfdata(intf);
1009         wlan_private *priv = cardp->priv;
1010
1011         lbs_deb_enter(LBS_DEB_USB);
1012
1013         cardp->rx_urb_recall = 0;
1014
1015         if_usb_submit_rx_urb(cardp->priv);
1016
1017         netif_device_attach(cardp->eth_dev);
1018         netif_device_attach(priv->mesh_dev);
1019
1020         lbs_deb_leave(LBS_DEB_USB);
1021         return 0;
1022 }
1023 #else
1024 #define if_usb_suspend NULL
1025 #define if_usb_resume NULL
1026 #endif
1027
1028 static struct usb_driver if_usb_driver = {
1029         /* driver name */
1030         .name = usbdriver_name,
1031         /* probe function name */
1032         .probe = if_usb_probe,
1033         /* disconnect function  name */
1034         .disconnect = if_usb_disconnect,
1035         /* device signature table */
1036         .id_table = if_usb_table,
1037         .suspend = if_usb_suspend,
1038         .resume = if_usb_resume,
1039 };
1040
1041 static int if_usb_init_module(void)
1042 {
1043         int ret = 0;
1044
1045         lbs_deb_enter(LBS_DEB_MAIN);
1046
1047         if (libertas_fw_name == NULL) {
1048                 libertas_fw_name = default_fw_name;
1049         }
1050
1051         ret = usb_register(&if_usb_driver);
1052
1053         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1054         return ret;
1055 }
1056
1057 static void if_usb_exit_module(void)
1058 {
1059         struct usb_card_rec *cardp, *cardp_temp;
1060
1061         lbs_deb_enter(LBS_DEB_MAIN);
1062
1063         list_for_each_entry_safe(cardp, cardp_temp, &usb_devices, list)
1064                 libertas_reset_device((wlan_private *) cardp->priv);
1065
1066         /* API unregisters the driver from USB subsystem */
1067         usb_deregister(&if_usb_driver);
1068
1069         lbs_deb_leave(LBS_DEB_MAIN);
1070 }
1071
1072 module_init(if_usb_init_module);
1073 module_exit(if_usb_exit_module);
1074
1075 MODULE_DESCRIPTION("8388 USB WLAN Driver");
1076 MODULE_AUTHOR("Marvell International Ltd.");
1077 MODULE_LICENSE("GPL");