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
  19 #define MESSAGE_HEADER_LEN      4
  20
  21 static const char usbdriver_name[] = "usb8xxx";
  22 static u8 *default_fw_name = "usb8388.bin";
  23
  24 char *libertas_fw_name = NULL;
  25 module_param_named(fw_name, libertas_fw_name, charp, 0644);
  26
  27 /*
  28  * We need to send a RESET command to all USB devices before
  29  * we tear down the USB connection. Otherwise we would not
  30  * be able to re-init device the device if the module gets
  31  * loaded again. This is a list of all initialized USB devices,
  32  * for the reset code see if_usb_reset_device()
  33 */
  34 static LIST_HEAD(usb_devices);
  35
  36 static struct usb_device_id if_usb_table[] = {
  37         /* Enter the device signature inside */
  38         { USB_DEVICE(0x1286, 0x2001) },
  39         { USB_DEVICE(0x05a3, 0x8388) },
  40         {}      /* Terminating entry */
  41 };
  42
  43 MODULE_DEVICE_TABLE(usb, if_usb_table);
  44
  45 static void if_usb_receive(struct urb *urb);
  46 static void if_usb_receive_fwload(struct urb *urb);
  47 static int if_usb_reset_device(wlan_private *priv);
  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
  55 /**
  56  *  @brief  call back function to handle the status of the URB
  57  *  @param urb          pointer to urb structure
  58  *  @return             N/A
  59  */
  60 static void if_usb_write_bulk_callback(struct urb *urb)
  61 {
  62         wlan_private *priv = (wlan_private *) (urb->context);
  63         wlan_adapter *adapter = priv->adapter;
  64         struct net_device *dev = priv->dev;
  65
  66         /* handle the transmission complete validations */
  67
  68         if (urb->status != 0) {
  69                 /* print the failure status number for debug */
  70                 lbs_pr_info("URB in failure status: %d\n", urb->status);
  71         } else {
  72                 /*
  73                 lbs_deb_usbd(&urb->dev->dev, "URB status is successfull\n");
  74                 lbs_deb_usbd(&urb->dev->dev, "Actual length transmitted %d\n",
  75                        urb->actual_length);
  76                 */
  77                 priv->dnld_sent = DNLD_RES_RECEIVED;
  78                 /* Wake main thread if commands are pending */
  79                 if (!adapter->cur_cmd)
  80                         wake_up_interruptible(&priv->mainthread.waitq);
  81                 if ((adapter->connect_status == libertas_connected)) {
  82                         netif_wake_queue(dev);
  83                         netif_wake_queue(priv->mesh_dev);
  84                 }
  85         }
  86
  87         return;
  88 }
  89
  90 /**
  91  *  @brief  free tx/rx urb, skb and rx buffer
  92  *  @param cardp        pointer usb_card_rec
  93  *  @return             N/A
  94  */
  95 void if_usb_free(struct usb_card_rec *cardp)
  96 {
  97         lbs_deb_enter(LBS_DEB_USB);
  98
  99         /* Unlink tx & rx urb */
 100         usb_kill_urb(cardp->tx_urb);
 101         usb_kill_urb(cardp->rx_urb);
 102
 103         usb_free_urb(cardp->tx_urb);
 104         cardp->tx_urb = NULL;
 105
 106         usb_free_urb(cardp->rx_urb);
 107         cardp->rx_urb = NULL;
 108
 109         kfree(cardp->bulk_out_buffer);
 110         cardp->bulk_out_buffer = NULL;
 111
 112         lbs_deb_leave(LBS_DEB_USB);
 113 }
 114
 115 /**
 116  *  @brief sets the configuration values
 117  *  @param ifnum        interface number
 118  *  @param id           pointer to usb_device_id
 119  *  @return             0 on success, error code on failure
 120  */
 121 static int if_usb_probe(struct usb_interface *intf,
 122                         const struct usb_device_id *id)
 123 {
 124         struct usb_device *udev;
 125         struct usb_host_interface *iface_desc;
 126         struct usb_endpoint_descriptor *endpoint;
 127         wlan_private *priv;
 128         struct usb_card_rec *cardp;
 129         int i;
 130
 131         udev = interface_to_usbdev(intf);
 132
 133         cardp = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
 134         if (!cardp) {
 135                 lbs_pr_err("Out of memory allocating private data.\n");
 136                 goto error;
 137         }
 138
 139         cardp->udev = udev;
 140         iface_desc = intf->cur_altsetting;
 141
 142         lbs_deb_usbd(&udev->dev, "bcdUSB = 0x%X bDeviceClass = 0x%X"
 143                " bDeviceSubClass = 0x%X, bDeviceProtocol = 0x%X\n",
 144                      le16_to_cpu(udev->descriptor.bcdUSB),
 145                      udev->descriptor.bDeviceClass,
 146                      udev->descriptor.bDeviceSubClass,
 147                      udev->descriptor.bDeviceProtocol);
 148
 149         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 150                 endpoint = &iface_desc->endpoint[i].desc;
 151                 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
 152                     && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 153                         USB_ENDPOINT_XFER_BULK)) {
 154                         /* we found a bulk in endpoint */
 155                         lbs_deb_usbd(&udev->dev, "Bulk in size is %d\n",
 156                                      le16_to_cpu(endpoint->wMaxPacketSize));
 157                         if (!(cardp->rx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
 158                                 lbs_deb_usbd(&udev->dev,
 159                                        "Rx URB allocation failed\n");
 160                                 goto dealloc;
 161                         }
 162                         cardp->rx_urb_recall = 0;
 163
 164                         cardp->bulk_in_size =
 165                                 le16_to_cpu(endpoint->wMaxPacketSize);
 166                         cardp->bulk_in_endpointAddr =
 167                             (endpoint->
 168                              bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 169                         lbs_deb_usbd(&udev->dev, "in_endpoint = %d\n",
 170                                endpoint->bEndpointAddress);
 171                 }
 172
 173                 if (((endpoint->
 174                       bEndpointAddress & USB_ENDPOINT_DIR_MASK) ==
 175                      USB_DIR_OUT)
 176                     && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 177                         USB_ENDPOINT_XFER_BULK)) {
 178                         /* We found bulk out endpoint */
 179                         if (!(cardp->tx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
 180                                 lbs_deb_usbd(&udev->dev,
 181                                        "Tx URB allocation failed\n");
 182                                 goto dealloc;
 183                         }
 184
 185                         cardp->bulk_out_size =
 186                                 le16_to_cpu(endpoint->wMaxPacketSize);
 187                         lbs_deb_usbd(&udev->dev,
 188                                      "Bulk out size is %d\n",
 189                                      le16_to_cpu(endpoint->wMaxPacketSize));
 190                         cardp->bulk_out_endpointAddr =
 191                             endpoint->bEndpointAddress;
 192                         lbs_deb_usbd(&udev->dev, "out_endpoint = %d\n",
 193                                     endpoint->bEndpointAddress);
 194                         cardp->bulk_out_buffer =
 195                             kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE,
 196                                     GFP_KERNEL);
 197
 198                         if (!cardp->bulk_out_buffer) {
 199                                 lbs_deb_usbd(&udev->dev,
 200                                        "Could not allocate buffer\n");
 201                                 goto dealloc;
 202                         }
 203                 }
 204         }
 205
 206         if (!(priv = libertas_add_card(cardp, &udev->dev)))
 207                 goto dealloc;
 208
 209         if (libertas_add_mesh(priv, &udev->dev))
 210                 goto err_add_mesh;
 211
 212         priv->hw_register_dev = if_usb_register_dev;
 213         priv->hw_unregister_dev = if_usb_unregister_dev;
 214         priv->hw_prog_firmware = if_usb_prog_firmware;
 215         priv->hw_host_to_card = if_usb_host_to_card;
 216         priv->hw_get_int_status = if_usb_get_int_status;
 217         priv->hw_read_event_cause = if_usb_read_event_cause;
 218
 219         if (libertas_activate_card(priv, libertas_fw_name))
 220                 goto err_activate_card;
 221
 222         list_add_tail(&cardp->list, &usb_devices);
 223
 224         usb_get_dev(udev);
 225         usb_set_intfdata(intf, cardp);
 226
 227         return 0;
 228
 229 err_activate_card:
 230         libertas_remove_mesh(priv);
 231 err_add_mesh:
 232         free_netdev(priv->dev);
 233         kfree(priv->adapter);
 234 dealloc:
 235         if_usb_free(cardp);
 236
 237 error:
 238         return -ENOMEM;
 239 }
 240
 241 /**
 242  *  @brief free resource and cleanup
 243  *  @param intf         USB interface structure
 244  *  @return             N/A
 245  */
 246 static void if_usb_disconnect(struct usb_interface *intf)
 247 {
 248         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 249         wlan_private *priv = (wlan_private *) cardp->priv;
 250         wlan_adapter *adapter = NULL;
 251
 252         adapter = priv->adapter;
 253
 254         /*
 255          * Update Surprise removed to TRUE
 256          */
 257         adapter->surpriseremoved = 1;
 258
 259         list_del(&cardp->list);
 260
 261         /* card is removed and we can call wlan_remove_card */
 262         lbs_deb_usbd(&cardp->udev->dev, "call remove card\n");
 263         libertas_remove_mesh(priv);
 264         libertas_remove_card(priv);
 265
 266         /* Unlink and free urb */
 267         if_usb_free(cardp);
 268
 269         usb_set_intfdata(intf, NULL);
 270         usb_put_dev(interface_to_usbdev(intf));
 271
 272         return;
 273 }
 274
 275 /**
 276  *  @brief  This function download FW
 277  *  @param priv         pointer to wlan_private
 278  *  @return             0
 279  */
 280 static int if_prog_firmware(wlan_private * priv)
 281 {
 282         struct usb_card_rec *cardp = priv->card;
 283         struct FWData *fwdata;
 284         struct fwheader *fwheader;
 285         u8 *firmware = priv->firmware->data;
 286
 287         fwdata = kmalloc(sizeof(struct FWData), GFP_ATOMIC);
 288
 289         if (!fwdata)
 290                 return -1;
 291
 292         fwheader = &fwdata->fwheader;
 293
 294         if (!cardp->CRC_OK) {
 295                 cardp->totalbytes = cardp->fwlastblksent;
 296                 cardp->fwseqnum = cardp->lastseqnum - 1;
 297         }
 298
 299         /*
 300         lbs_deb_usbd(&cardp->udev->dev, "totalbytes = %d\n",
 301                     cardp->totalbytes);
 302         */
 303
 304         memcpy(fwheader, &firmware[cardp->totalbytes],
 305                sizeof(struct fwheader));
 306
 307         cardp->fwlastblksent = cardp->totalbytes;
 308         cardp->totalbytes += sizeof(struct fwheader);
 309
 310         /* lbs_deb_usbd(&cardp->udev->dev,"Copy Data\n"); */
 311         memcpy(fwdata->data, &firmware[cardp->totalbytes],
 312                le32_to_cpu(fwdata->fwheader.datalength));
 313
 314         /*
 315         lbs_deb_usbd(&cardp->udev->dev,
 316                     "Data length = %d\n", le32_to_cpu(fwdata->fwheader.datalength));
 317         */
 318
 319         cardp->fwseqnum = cardp->fwseqnum + 1;
 320
 321         fwdata->seqnum = cpu_to_le32(cardp->fwseqnum);
 322         cardp->lastseqnum = cardp->fwseqnum;
 323         cardp->totalbytes += le32_to_cpu(fwdata->fwheader.datalength);
 324
 325         if (fwheader->dnldcmd == cpu_to_le32(FW_HAS_DATA_TO_RECV)) {
 326                 /*
 327                 lbs_deb_usbd(&cardp->udev->dev, "There are data to follow\n");
 328                 lbs_deb_usbd(&cardp->udev->dev,
 329                             "seqnum = %d totalbytes = %d\n", cardp->fwseqnum,
 330                             cardp->totalbytes);
 331                 */
 332                 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
 333                 usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
 334
 335         } else if (fwdata->fwheader.dnldcmd == cpu_to_le32(FW_HAS_LAST_BLOCK)) {
 336                 /*
 337                 lbs_deb_usbd(&cardp->udev->dev,
 338                             "Host has finished FW downloading\n");
 339                 lbs_deb_usbd(&cardp->udev->dev,
 340                             "Donwloading FW JUMP BLOCK\n");
 341                 */
 342                 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
 343                 usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
 344                 cardp->fwfinalblk = 1;
 345         }
 346
 347         /*
 348         lbs_deb_usbd(&cardp->udev->dev,
 349                     "The firmware download is done size is %d\n",
 350                     cardp->totalbytes);
 351         */
 352
 353         kfree(fwdata);
 354
 355         return 0;
 356 }
 357
 358 static int libertas_do_reset(wlan_private *priv)
 359 {
 360         int ret;
 361         struct usb_card_rec *cardp = priv->card;
 362
 363         lbs_deb_enter(LBS_DEB_USB);
 364
 365         ret = usb_reset_device(cardp->udev);
 366         if (!ret) {
 367                 msleep(10);
 368                 if_usb_reset_device(priv);
 369                 msleep(10);
 370         }
 371
 372         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 373
 374         return ret;
 375 }
 376
 377 /**
 378  *  @brief This function transfer the data to the device.
 379  *  @param priv         pointer to wlan_private
 380  *  @param payload      pointer to payload data
 381  *  @param nb           data length
 382  *  @return             0 or -1
 383  */
 384 int usb_tx_block(wlan_private * priv, u8 * payload, u16 nb)
 385 {
 386         /* pointer to card structure */
 387         struct usb_card_rec *cardp = priv->card;
 388         int ret = -1;
 389
 390         /* check if device is removed */
 391         if (priv->adapter->surpriseremoved) {
 392                 lbs_deb_usbd(&cardp->udev->dev, "Device removed\n");
 393                 goto tx_ret;
 394         }
 395
 396         usb_fill_bulk_urb(cardp->tx_urb, cardp->udev,
 397                           usb_sndbulkpipe(cardp->udev,
 398                                           cardp->bulk_out_endpointAddr),
 399                           payload, nb, if_usb_write_bulk_callback, priv);
 400
 401         cardp->tx_urb->transfer_flags |= URB_ZERO_PACKET;
 402
 403         if ((ret = usb_submit_urb(cardp->tx_urb, GFP_ATOMIC))) {
 404                 /*  transfer failed */
 405                 lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb failed\n");
 406                 ret = -1;
 407         } else {
 408                 /* lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb success\n"); */
 409                 ret = 0;
 410         }
 411
 412 tx_ret:
 413         return ret;
 414 }
 415
 416 static int __if_usb_submit_rx_urb(wlan_private * priv,
 417                                   void (*callbackfn)
 418                                   (struct urb *urb))
 419 {
 420         struct usb_card_rec *cardp = priv->card;
 421         struct sk_buff *skb;
 422         struct read_cb_info *rinfo = &cardp->rinfo;
 423         int ret = -1;
 424
 425         if (!(skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE))) {
 426                 lbs_pr_err("No free skb\n");
 427                 goto rx_ret;
 428         }
 429
 430         rinfo->skb = skb;
 431
 432         /* Fill the receive configuration URB and initialise the Rx call back */
 433         usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
 434                           usb_rcvbulkpipe(cardp->udev,
 435                                           cardp->bulk_in_endpointAddr),
 436                           (void *) (skb->tail + (size_t) IPFIELD_ALIGN_OFFSET),
 437                           MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn,
 438                           rinfo);
 439
 440         cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;
 441
 442         /* lbs_deb_usbd(&cardp->udev->dev, "Pointer for rx_urb %p\n", cardp->rx_urb); */
 443         if ((ret = usb_submit_urb(cardp->rx_urb, GFP_ATOMIC))) {
 444                 /* handle failure conditions */
 445                 lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB failed\n");
 446                 ret = -1;
 447         } else {
 448                 /* lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB success\n"); */
 449                 ret = 0;
 450         }
 451
 452 rx_ret:
 453         return ret;
 454 }
 455
 456 static inline int if_usb_submit_rx_urb_fwload(wlan_private * priv)
 457 {
 458         return __if_usb_submit_rx_urb(priv, &if_usb_receive_fwload);
 459 }
 460
 461 static inline int if_usb_submit_rx_urb(wlan_private * priv)
 462 {
 463         return __if_usb_submit_rx_urb(priv, &if_usb_receive);
 464 }
 465
 466 static void if_usb_receive_fwload(struct urb *urb)
 467 {
 468         struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
 469         wlan_private *priv = rinfo->priv;
 470         struct sk_buff *skb = rinfo->skb;
 471         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
 472         struct fwsyncheader *syncfwheader;
 473         struct bootcmdrespStr bootcmdresp;
 474
 475         if (urb->status) {
 476                 lbs_deb_usbd(&cardp->udev->dev,
 477                             "URB status is failed during fw load\n");
 478                 kfree_skb(skb);
 479                 return;
 480         }
 481
 482         if (cardp->bootcmdresp == 0) {
 483                 memcpy (&bootcmdresp, skb->data + IPFIELD_ALIGN_OFFSET,
 484                         sizeof(bootcmdresp));
 485                 if (le16_to_cpu(cardp->udev->descriptor.bcdDevice) < 0x3106) {
 486                         kfree_skb(skb);
 487                         if_usb_submit_rx_urb_fwload(priv);
 488                         cardp->bootcmdresp = 1;
 489                         lbs_deb_usbd(&cardp->udev->dev,
 490                                     "Received valid boot command response\n");
 491                         return;
 492                 }
 493                 if (bootcmdresp.u32magicnumber != cpu_to_le32(BOOT_CMD_MAGIC_NUMBER)) {
 494                         lbs_pr_info(
 495                                 "boot cmd response wrong magic number (0x%x)\n",
 496                                 le32_to_cpu(bootcmdresp.u32magicnumber));
 497                 } else if (bootcmdresp.u8cmd_tag != BOOT_CMD_FW_BY_USB) {
 498                         lbs_pr_info(
 499                                 "boot cmd response cmd_tag error (%d)\n",
 500                                 bootcmdresp.u8cmd_tag);
 501                 } else if (bootcmdresp.u8result != BOOT_CMD_RESP_OK) {
 502                         lbs_pr_info(
 503                                 "boot cmd response result error (%d)\n",
 504                                 bootcmdresp.u8result);
 505                 } else {
 506                         cardp->bootcmdresp = 1;
 507                         lbs_deb_usbd(&cardp->udev->dev,
 508                                     "Received valid boot command response\n");
 509                 }
 510                 kfree_skb(skb);
 511                 if_usb_submit_rx_urb_fwload(priv);
 512                 return;
 513         }
 514
 515         syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
 516         if (!syncfwheader) {
 517                 lbs_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
 518                 kfree_skb(skb);
 519                 return;
 520         }
 521
 522         memcpy(syncfwheader, skb->data + IPFIELD_ALIGN_OFFSET,
 523                         sizeof(struct fwsyncheader));
 524
 525         if (!syncfwheader->cmd) {
 526                 /*
 527                 lbs_deb_usbd(&cardp->udev->dev,
 528                             "FW received Blk with correct CRC\n");
 529                 lbs_deb_usbd(&cardp->udev->dev,
 530                             "FW received Blk seqnum = %d\n",
 531                        syncfwheader->seqnum);
 532                 */
 533                 cardp->CRC_OK = 1;
 534         } else {
 535                 lbs_deb_usbd(&cardp->udev->dev,
 536                             "FW received Blk with CRC error\n");
 537                 cardp->CRC_OK = 0;
 538         }
 539
 540         kfree_skb(skb);
 541
 542         if (cardp->fwfinalblk) {
 543                 cardp->fwdnldover = 1;
 544                 goto exit;
 545         }
 546
 547         if_prog_firmware(priv);
 548
 549         if_usb_submit_rx_urb_fwload(priv);
 550 exit:
 551         kfree(syncfwheader);
 552
 553         return;
 554
 555 }
 556
 557 #define MRVDRV_MIN_PKT_LEN      30
 558
 559 static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
 560                                        struct usb_card_rec *cardp,
 561                                        wlan_private *priv)
 562 {
 563         if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE +
 564             MESSAGE_HEADER_LEN || recvlength < MRVDRV_MIN_PKT_LEN) {
 565                 lbs_deb_usbd(&cardp->udev->dev,
 566                             "Packet length is Invalid\n");
 567                 kfree_skb(skb);
 568                 return;
 569         }
 570
 571         skb_reserve(skb, IPFIELD_ALIGN_OFFSET);
 572         skb_put(skb, recvlength);
 573         skb_pull(skb, MESSAGE_HEADER_LEN);
 574         libertas_process_rxed_packet(priv, skb);
 575         priv->upld_len = (recvlength - MESSAGE_HEADER_LEN);
 576 }
 577
 578 static inline void process_cmdrequest(int recvlength, u8 *recvbuff,
 579                                       struct sk_buff *skb,
 580                                       struct usb_card_rec *cardp,
 581                                       wlan_private *priv)
 582 {
 583         u8 *cmdbuf;
 584         if (recvlength > MRVDRV_SIZE_OF_CMD_BUFFER) {
 585                 lbs_deb_usbd(&cardp->udev->dev,
 586                             "The receive buffer is too large\n");
 587                 kfree_skb(skb);
 588                 return;
 589         }
 590
 591         if (!in_interrupt())
 592                 BUG();
 593
 594         spin_lock(&priv->adapter->driver_lock);
 595         /* take care of cur_cmd = NULL case by reading the
 596          * data to clear the interrupt */
 597         if (!priv->adapter->cur_cmd) {
 598                 cmdbuf = priv->upld_buf;
 599                 priv->adapter->hisregcpy &= ~his_cmdupldrdy;
 600         } else
 601                 cmdbuf = priv->adapter->cur_cmd->bufvirtualaddr;
 602
 603         cardp->usb_int_cause |= his_cmdupldrdy;
 604         priv->upld_len = (recvlength - MESSAGE_HEADER_LEN);
 605         memcpy(cmdbuf, recvbuff + MESSAGE_HEADER_LEN,
 606                priv->upld_len);
 607
 608         kfree_skb(skb);
 609         libertas_interrupt(priv->dev);
 610         spin_unlock(&priv->adapter->driver_lock);
 611
 612         lbs_deb_usbd(&cardp->udev->dev,
 613                     "Wake up main thread to handle cmd response\n");
 614
 615         return;
 616 }
 617
 618 /**
 619  *  @brief This function reads of the packet into the upload buff,
 620  *  wake up the main thread and initialise the Rx callack.
 621  *
 622  *  @param urb          pointer to struct urb
 623  *  @return             N/A
 624  */
 625 static void if_usb_receive(struct urb *urb)
 626 {
 627         struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
 628         wlan_private *priv = rinfo->priv;
 629         struct sk_buff *skb = rinfo->skb;
 630         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
 631
 632         int recvlength = urb->actual_length;
 633         u8 *recvbuff = NULL;
 634         u32 recvtype;
 635
 636         lbs_deb_enter(LBS_DEB_USB);
 637
 638         if (recvlength) {
 639                 if (urb->status) {
 640                         lbs_deb_usbd(&cardp->udev->dev,
 641                                     "URB status is failed\n");
 642                         kfree_skb(skb);
 643                         goto setup_for_next;
 644                 }
 645
 646                 recvbuff = skb->data + IPFIELD_ALIGN_OFFSET;
 647                 memcpy(&recvtype, recvbuff, sizeof(u32));
 648                 lbs_deb_usbd(&cardp->udev->dev,
 649                             "Recv length = 0x%x\n", recvlength);
 650                 lbs_deb_usbd(&cardp->udev->dev,
 651                             "Receive type = 0x%X\n", recvtype);
 652                 recvtype = le32_to_cpu(recvtype);
 653                 lbs_deb_usbd(&cardp->udev->dev,
 654                             "Receive type after = 0x%X\n", recvtype);
 655         } else if (urb->status)
 656                 goto rx_exit;
 657
 658
 659         switch (recvtype) {
 660         case CMD_TYPE_DATA:
 661                 process_cmdtypedata(recvlength, skb, cardp, priv);
 662                 break;
 663
 664         case CMD_TYPE_REQUEST:
 665                 process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
 666                 break;
 667
 668         case CMD_TYPE_INDICATION:
 669                 /* Event cause handling */
 670                 spin_lock(&priv->adapter->driver_lock);
 671                 cardp->usb_event_cause = le32_to_cpu(*(__le32 *) (recvbuff + MESSAGE_HEADER_LEN));
 672                 lbs_deb_usbd(&cardp->udev->dev,"**EVENT** 0x%X\n",
 673                             cardp->usb_event_cause);
 674                 if (cardp->usb_event_cause & 0xffff0000) {
 675                         libertas_send_tx_feedback(priv);
 676                         spin_unlock(&priv->adapter->driver_lock);
 677                         break;
 678                 }
 679                 cardp->usb_event_cause <<= 3;
 680                 cardp->usb_int_cause |= his_cardevent;
 681                 kfree_skb(skb);
 682                 libertas_interrupt(priv->dev);
 683                 spin_unlock(&priv->adapter->driver_lock);
 684                 goto rx_exit;
 685         default:
 686                 kfree_skb(skb);
 687                 break;
 688         }
 689
 690 setup_for_next:
 691         if_usb_submit_rx_urb(priv);
 692 rx_exit:
 693         lbs_deb_leave(LBS_DEB_USB);
 694 }
 695
 696 /**
 697  *  @brief This function downloads data to FW
 698  *  @param priv         pointer to wlan_private structure
 699  *  @param type         type of data
 700  *  @param buf          pointer to data buffer
 701  *  @param len          number of bytes
 702  *  @return             0 or -1
 703  */
 704 static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb)
 705 {
 706         int ret = -1;
 707         u32 tmp;
 708         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
 709
 710         lbs_deb_usbd(&cardp->udev->dev,"*** type = %u\n", type);
 711         lbs_deb_usbd(&cardp->udev->dev,"size after = %d\n", nb);
 712
 713         if (type == MVMS_CMD) {
 714                 tmp = cpu_to_le32(CMD_TYPE_REQUEST);
 715                 priv->dnld_sent = DNLD_CMD_SENT;
 716                 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
 717                        MESSAGE_HEADER_LEN);
 718
 719         } else {
 720                 tmp = cpu_to_le32(CMD_TYPE_DATA);
 721                 priv->dnld_sent = DNLD_DATA_SENT;
 722                 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
 723                        MESSAGE_HEADER_LEN);
 724         }
 725
 726         memcpy((cardp->bulk_out_buffer + MESSAGE_HEADER_LEN), payload, nb);
 727
 728         ret =
 729             usb_tx_block(priv, cardp->bulk_out_buffer, nb + MESSAGE_HEADER_LEN);
 730
 731         return ret;
 732 }
 733
 734 /* called with adapter->driver_lock held */
 735 static int if_usb_get_int_status(wlan_private * priv, u8 * ireg)
 736 {
 737         struct usb_card_rec *cardp = priv->card;
 738
 739         *ireg = cardp->usb_int_cause;
 740         cardp->usb_int_cause = 0;
 741
 742         lbs_deb_usbd(&cardp->udev->dev,"Int cause is 0x%X\n", *ireg);
 743
 744         return 0;
 745 }
 746
 747 static int if_usb_read_event_cause(wlan_private * priv)
 748 {
 749         struct usb_card_rec *cardp = priv->card;
 750         priv->adapter->eventcause = cardp->usb_event_cause;
 751         /* Re-submit rx urb here to avoid event lost issue */
 752         if_usb_submit_rx_urb(priv);
 753         return 0;
 754 }
 755
 756 static int if_usb_reset_device(wlan_private *priv)
 757 {
 758         int ret;
 759
 760         lbs_deb_enter(LBS_DEB_USB);
 761         ret = libertas_prepare_and_send_command(priv, cmd_802_11_reset,
 762                                     cmd_act_halt, 0, 0, NULL);
 763         msleep_interruptible(10);
 764
 765         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 766         return ret;
 767 }
 768
 769 static int if_usb_unregister_dev(wlan_private * priv)
 770 {
 771         int ret = 0;
 772
 773         /* Need to send a Reset command to device before USB resources freed
 774          * and wlan_remove_card() called, then device can handle FW download
 775          * again.
 776          */
 777         if (priv)
 778                 if_usb_reset_device(priv);
 779
 780         return ret;
 781 }
 782
 783
 784 /**
 785  *  @brief  This function register usb device and initialize parameter
 786  *  @param              priv pointer to wlan_private
 787  *  @return             0 or -1
 788  */
 789 static int if_usb_register_dev(wlan_private * priv)
 790 {
 791         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
 792
 793         lbs_deb_enter(LBS_DEB_USB);
 794
 795         cardp->priv = priv;
 796         cardp->eth_dev = priv->dev;
 797         priv->hotplug_device = &(cardp->udev->dev);
 798
 799         lbs_deb_usbd(&cardp->udev->dev, "udev pointer is at %p\n",
 800                     cardp->udev);
 801
 802         lbs_deb_leave(LBS_DEB_USB);
 803         return 0;
 804 }
 805
 806
 807
 808 static int if_usb_prog_firmware(wlan_private * priv)
 809 {
 810         struct usb_card_rec *cardp = priv->card;
 811         int i = 0;
 812         static int reset_count = 10;
 813         int ret = 0;
 814
 815         lbs_deb_enter(LBS_DEB_USB);
 816
 817         cardp->rinfo.priv = priv;
 818
 819 restart:
 820         if (if_usb_submit_rx_urb_fwload(priv) < 0) {
 821                 lbs_deb_usbd(&cardp->udev->dev, "URB submission is failed\n");
 822                 ret = -1;
 823                 goto done;
 824         }
 825
 826         cardp->bootcmdresp = 0;
 827         do {
 828                 int j = 0;
 829                 i++;
 830                 /* Issue Boot command = 1, Boot from Download-FW */
 831                 if_usb_issue_boot_command(priv, BOOT_CMD_FW_BY_USB);
 832                 /* wait for command response */
 833                 do {
 834                         j++;
 835                         msleep_interruptible(100);
 836                 } while (cardp->bootcmdresp == 0 && j < 10);
 837         } while (cardp->bootcmdresp == 0 && i < 5);
 838
 839         if (cardp->bootcmdresp == 0) {
 840                 if (--reset_count >= 0) {
 841                         libertas_do_reset(priv);
 842                         goto restart;
 843                 }
 844                 return -1;
 845         }
 846
 847         i = 0;
 848         priv->adapter->fw_ready = 0;
 849
 850         cardp->totalbytes = 0;
 851         cardp->fwlastblksent = 0;
 852         cardp->CRC_OK = 1;
 853         cardp->fwdnldover = 0;
 854         cardp->fwseqnum = -1;
 855         cardp->totalbytes = 0;
 856         cardp->fwfinalblk = 0;
 857
 858         if_prog_firmware(priv);
 859
 860         do {
 861                 lbs_deb_usbd(&cardp->udev->dev,"Wlan sched timeout\n");
 862                 i++;
 863                 msleep_interruptible(100);
 864                 if (priv->adapter->surpriseremoved || i >= 20)
 865                         break;
 866         } while (!cardp->fwdnldover);
 867
 868         if (!cardp->fwdnldover) {
 869                 lbs_pr_info("failed to load fw, resetting device!\n");
 870                 if (--reset_count >= 0) {
 871                         libertas_do_reset(priv);
 872                         goto restart;
 873                 }
 874
 875                 lbs_pr_info("FW download failure, time = %d ms\n", i * 100);
 876                 ret = -1;
 877                 goto done;
 878         }
 879
 880         if_usb_submit_rx_urb(priv);
 881
 882         /* Delay 200 ms to waiting for the FW ready */
 883         msleep_interruptible(200);
 884
 885         priv->adapter->fw_ready = 1;
 886
 887 done:
 888         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 889         return ret;
 890 }
 891
 892 #ifdef CONFIG_PM
 893 static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)
 894 {
 895         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 896         wlan_private *priv = cardp->priv;
 897
 898         lbs_deb_enter(LBS_DEB_USB);
 899
 900         if (priv->adapter->psstate != PS_STATE_FULL_POWER)
 901                 return -1;
 902
 903         netif_device_detach(cardp->eth_dev);
 904         netif_device_detach(priv->mesh_dev);
 905
 906         /* Unlink tx & rx urb */
 907         usb_kill_urb(cardp->tx_urb);
 908         usb_kill_urb(cardp->rx_urb);
 909
 910         cardp->rx_urb_recall = 1;
 911
 912         lbs_deb_leave(LBS_DEB_USB);
 913         return 0;
 914 }
 915
 916 static int if_usb_resume(struct usb_interface *intf)
 917 {
 918         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 919         wlan_private *priv = cardp->priv;
 920
 921         lbs_deb_enter(LBS_DEB_USB);
 922
 923         cardp->rx_urb_recall = 0;
 924
 925         if_usb_submit_rx_urb(cardp->priv);
 926
 927         netif_device_attach(cardp->eth_dev);
 928         netif_device_attach(priv->mesh_dev);
 929
 930         lbs_deb_leave(LBS_DEB_USB);
 931         return 0;
 932 }
 933 #else
 934 #define if_usb_suspend NULL
 935 #define if_usb_resume NULL
 936 #endif
 937
 938 static struct usb_driver if_usb_driver = {
 939         /* driver name */
 940         .name = usbdriver_name,
 941         /* probe function name */
 942         .probe = if_usb_probe,
 943         /* disconnect function  name */
 944         .disconnect = if_usb_disconnect,
 945         /* device signature table */
 946         .id_table = if_usb_table,
 947         .suspend = if_usb_suspend,
 948         .resume = if_usb_resume,
 949 };
 950
 951 static int if_usb_init_module(void)
 952 {
 953         int ret = 0;
 954
 955         lbs_deb_enter(LBS_DEB_MAIN);
 956
 957         if (libertas_fw_name == NULL) {
 958                 libertas_fw_name = default_fw_name;
 959         }
 960
 961         ret = usb_register(&if_usb_driver);
 962
 963         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
 964         return ret;
 965 }
 966
 967 static void if_usb_exit_module(void)
 968 {
 969         struct usb_card_rec *cardp, *cardp_temp;
 970
 971         lbs_deb_enter(LBS_DEB_MAIN);
 972
 973         list_for_each_entry_safe(cardp, cardp_temp, &usb_devices, list)
 974                 if_usb_reset_device((wlan_private *) cardp->priv);
 975
 976         /* API unregisters the driver from USB subsystem */
 977         usb_deregister(&if_usb_driver);
 978
 979         lbs_deb_leave(LBS_DEB_MAIN);
 980 }
 981
 982 module_init(if_usb_init_module);
 983 module_exit(if_usb_exit_module);
 984
 985 MODULE_DESCRIPTION("8388 USB WLAN Driver");
 986 MODULE_AUTHOR("Marvell International Ltd.");
 987 MODULE_LICENSE("GPL");