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                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                                endpoint->wMaxPacketSize);
 157                         if (!
 158                             (cardp->rx_urb =
 159                              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                             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 (!
 182                             (cardp->tx_urb =
 183                              usb_alloc_urb(0, GFP_KERNEL))) {
 184                                 lbs_deb_usbd(&udev->dev,
 185                                        "Tx URB allocation failed\n");
 186                                 goto dealloc;
 187                         }
 188
 189                         cardp->bulk_out_size =
 190                             endpoint->wMaxPacketSize;
 191                         lbs_deb_usbd(&udev->dev,
 192                                     "Bulk out size is %d\n",
 193                                     endpoint->wMaxPacketSize);
 194                         cardp->bulk_out_endpointAddr =
 195                             endpoint->bEndpointAddress;
 196                         lbs_deb_usbd(&udev->dev, "out_endpoint = %d\n",
 197                                     endpoint->bEndpointAddress);
 198                         cardp->bulk_out_buffer =
 199                             kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE,
 200                                     GFP_KERNEL);
 201
 202                         if (!cardp->bulk_out_buffer) {
 203                                 lbs_deb_usbd(&udev->dev,
 204                                        "Could not allocate buffer\n");
 205                                 goto dealloc;
 206                         }
 207                 }
 208         }
 209
 210         if (!(priv = libertas_add_card(cardp, &udev->dev)))
 211                 goto dealloc;
 212
 213         if (libertas_add_mesh(priv, &udev->dev))
 214                 goto err_add_mesh;
 215
 216         priv->hw_register_dev = if_usb_register_dev;
 217         priv->hw_unregister_dev = if_usb_unregister_dev;
 218         priv->hw_prog_firmware = if_usb_prog_firmware;
 219         priv->hw_host_to_card = if_usb_host_to_card;
 220         priv->hw_get_int_status = if_usb_get_int_status;
 221         priv->hw_read_event_cause = if_usb_read_event_cause;
 222
 223         if (libertas_activate_card(priv, libertas_fw_name))
 224                 goto err_activate_card;
 225
 226         list_add_tail(&cardp->list, &usb_devices);
 227
 228         usb_get_dev(udev);
 229         usb_set_intfdata(intf, cardp);
 230
 231         return 0;
 232
 233 err_activate_card:
 234         libertas_remove_mesh(priv);
 235 err_add_mesh:
 236         free_netdev(priv->dev);
 237         kfree(priv->adapter);
 238 dealloc:
 239         if_usb_free(cardp);
 240
 241 error:
 242         return -ENOMEM;
 243 }
 244
 245 /**
 246  *  @brief free resource and cleanup
 247  *  @param intf         USB interface structure
 248  *  @return             N/A
 249  */
 250 static void if_usb_disconnect(struct usb_interface *intf)
 251 {
 252         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 253         wlan_private *priv = (wlan_private *) cardp->priv;
 254         wlan_adapter *adapter = NULL;
 255
 256         adapter = priv->adapter;
 257
 258         /*
 259          * Update Surprise removed to TRUE
 260          */
 261         adapter->surpriseremoved = 1;
 262
 263         list_del(&cardp->list);
 264
 265         /* card is removed and we can call wlan_remove_card */
 266         lbs_deb_usbd(&cardp->udev->dev, "call remove card\n");
 267         libertas_remove_mesh(priv);
 268         libertas_remove_card(priv);
 269
 270         /* Unlink and free urb */
 271         if_usb_free(cardp);
 272
 273         usb_set_intfdata(intf, NULL);
 274         usb_put_dev(interface_to_usbdev(intf));
 275
 276         return;
 277 }
 278
 279 /**
 280  *  @brief  This function download FW
 281  *  @param priv         pointer to wlan_private
 282  *  @return             0
 283  */
 284 static int if_prog_firmware(wlan_private * priv)
 285 {
 286         struct usb_card_rec *cardp = priv->card;
 287         struct FWData *fwdata;
 288         struct fwheader *fwheader;
 289         u8 *firmware = priv->firmware->data;
 290
 291         fwdata = kmalloc(sizeof(struct FWData), GFP_ATOMIC);
 292
 293         if (!fwdata)
 294                 return -1;
 295
 296         fwheader = &fwdata->fwheader;
 297
 298         if (!cardp->CRC_OK) {
 299                 cardp->totalbytes = cardp->fwlastblksent;
 300                 cardp->fwseqnum = cardp->lastseqnum - 1;
 301         }
 302
 303         /*
 304         lbs_deb_usbd(&cardp->udev->dev, "totalbytes = %d\n",
 305                     cardp->totalbytes);
 306         */
 307
 308         memcpy(fwheader, &firmware[cardp->totalbytes],
 309                sizeof(struct fwheader));
 310
 311         cardp->fwlastblksent = cardp->totalbytes;
 312         cardp->totalbytes += sizeof(struct fwheader);
 313
 314         /* lbs_deb_usbd(&cardp->udev->dev,"Copy Data\n"); */
 315         memcpy(fwdata->data, &firmware[cardp->totalbytes],
 316                fwdata->fwheader.datalength);
 317
 318         /*
 319         lbs_deb_usbd(&cardp->udev->dev,
 320                     "Data length = %d\n", fwdata->fwheader.datalength);
 321         */
 322
 323         cardp->fwseqnum = cardp->fwseqnum + 1;
 324
 325         fwdata->seqnum = cardp->fwseqnum;
 326         cardp->lastseqnum = fwdata->seqnum;
 327         cardp->totalbytes += fwdata->fwheader.datalength;
 328
 329         if (fwheader->dnldcmd == FW_HAS_DATA_TO_RECV) {
 330                 /*
 331                 lbs_deb_usbd(&cardp->udev->dev, "There is data to follow\n");
 332                 lbs_deb_usbd(&cardp->udev->dev,
 333                             "seqnum = %d totalbytes = %d\n", cardp->fwseqnum,
 334                             cardp->totalbytes);
 335                 */
 336                 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
 337                 usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
 338
 339         } else if (fwdata->fwheader.dnldcmd == FW_HAS_LAST_BLOCK) {
 340                 /*
 341                 lbs_deb_usbd(&cardp->udev->dev,
 342                             "Host has finished FW downloading\n");
 343                 lbs_deb_usbd(&cardp->udev->dev,
 344                             "Donwloading FW JUMP BLOCK\n");
 345                 */
 346                 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
 347                 usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
 348                 cardp->fwfinalblk = 1;
 349         }
 350
 351         /*
 352         lbs_deb_usbd(&cardp->udev->dev,
 353                     "The firmware download is done size is %d\n",
 354                     cardp->totalbytes);
 355         */
 356
 357         kfree(fwdata);
 358
 359         return 0;
 360 }
 361
 362 static int libertas_do_reset(wlan_private *priv)
 363 {
 364         int ret;
 365         struct usb_card_rec *cardp = priv->card;
 366
 367         lbs_deb_enter(LBS_DEB_USB);
 368
 369         ret = usb_reset_device(cardp->udev);
 370         if (!ret) {
 371                 msleep(10);
 372                 if_usb_reset_device(priv);
 373                 msleep(10);
 374         }
 375
 376         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 377
 378         return ret;
 379 }
 380
 381 /**
 382  *  @brief This function transfer the data to the device.
 383  *  @param priv         pointer to wlan_private
 384  *  @param payload      pointer to payload data
 385  *  @param nb           data length
 386  *  @return             0 or -1
 387  */
 388 int usb_tx_block(wlan_private * priv, u8 * payload, u16 nb)
 389 {
 390         /* pointer to card structure */
 391         struct usb_card_rec *cardp = priv->card;
 392         int ret = -1;
 393
 394         /* check if device is removed */
 395         if (priv->adapter->surpriseremoved) {
 396                 lbs_deb_usbd(&cardp->udev->dev, "Device removed\n");
 397                 goto tx_ret;
 398         }
 399
 400         usb_fill_bulk_urb(cardp->tx_urb, cardp->udev,
 401                           usb_sndbulkpipe(cardp->udev,
 402                                           cardp->bulk_out_endpointAddr),
 403                           payload, nb, if_usb_write_bulk_callback, priv);
 404
 405         cardp->tx_urb->transfer_flags |= URB_ZERO_PACKET;
 406
 407         if ((ret = usb_submit_urb(cardp->tx_urb, GFP_ATOMIC))) {
 408                 /*  transfer failed */
 409                 lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb failed\n");
 410                 ret = -1;
 411         } else {
 412                 /* lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb success\n"); */
 413                 ret = 0;
 414         }
 415
 416 tx_ret:
 417         return ret;
 418 }
 419
 420 static int __if_usb_submit_rx_urb(wlan_private * priv,
 421                                   void (*callbackfn)
 422                                   (struct urb *urb))
 423 {
 424         struct usb_card_rec *cardp = priv->card;
 425         struct sk_buff *skb;
 426         struct read_cb_info *rinfo = &cardp->rinfo;
 427         int ret = -1;
 428
 429         if (!(skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE))) {
 430                 lbs_pr_err("No free skb\n");
 431                 goto rx_ret;
 432         }
 433
 434         rinfo->skb = skb;
 435
 436         /* Fill the receive configuration URB and initialise the Rx call back */
 437         usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
 438                           usb_rcvbulkpipe(cardp->udev,
 439                                           cardp->bulk_in_endpointAddr),
 440                           (void *) (skb->tail + (size_t) IPFIELD_ALIGN_OFFSET),
 441                           MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn,
 442                           rinfo);
 443
 444         cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;
 445
 446         /* lbs_deb_usbd(&cardp->udev->dev, "Pointer for rx_urb %p\n", cardp->rx_urb); */
 447         if ((ret = usb_submit_urb(cardp->rx_urb, GFP_ATOMIC))) {
 448                 /* handle failure conditions */
 449                 lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB failed\n");
 450                 ret = -1;
 451         } else {
 452                 /* lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB success\n"); */
 453                 ret = 0;
 454         }
 455
 456 rx_ret:
 457         return ret;
 458 }
 459
 460 static inline int if_usb_submit_rx_urb_fwload(wlan_private * priv)
 461 {
 462         return __if_usb_submit_rx_urb(priv, &if_usb_receive_fwload);
 463 }
 464
 465 static inline int if_usb_submit_rx_urb(wlan_private * priv)
 466 {
 467         return __if_usb_submit_rx_urb(priv, &if_usb_receive);
 468 }
 469
 470 static void if_usb_receive_fwload(struct urb *urb)
 471 {
 472         struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
 473         wlan_private *priv = rinfo->priv;
 474         struct sk_buff *skb = rinfo->skb;
 475         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
 476         struct fwsyncheader *syncfwheader;
 477         struct bootcmdrespStr bootcmdresp;
 478
 479         if (urb->status) {
 480                 lbs_deb_usbd(&cardp->udev->dev,
 481                             "URB status is failed during fw load\n");
 482                 kfree_skb(skb);
 483                 return;
 484         }
 485
 486         if (cardp->bootcmdresp == 0) {
 487                 memcpy (&bootcmdresp, skb->data + IPFIELD_ALIGN_OFFSET,
 488                         sizeof(bootcmdresp));
 489                 if (cardp->udev->descriptor.bcdDevice < 0x3106) {
 490                         kfree_skb(skb);
 491                         if_usb_submit_rx_urb_fwload(priv);
 492                         cardp->bootcmdresp = 1;
 493                         lbs_deb_usbd(&cardp->udev->dev,
 494                                     "Received valid boot command response\n");
 495                         return;
 496                 }
 497                 if (bootcmdresp.u32magicnumber != BOOT_CMD_MAGIC_NUMBER) {
 498                         lbs_pr_info(
 499                                 "boot cmd response wrong magic number (0x%x)\n",
 500                                 bootcmdresp.u32magicnumber);
 501                 } else if (bootcmdresp.u8cmd_tag != BOOT_CMD_FW_BY_USB) {
 502                         lbs_pr_info(
 503                                 "boot cmd response cmd_tag error (%d)\n",
 504                                 bootcmdresp.u8cmd_tag);
 505                 } else if (bootcmdresp.u8result != BOOT_CMD_RESP_OK) {
 506                         lbs_pr_info(
 507                                 "boot cmd response result error (%d)\n",
 508                                 bootcmdresp.u8result);
 509                 } else {
 510                         cardp->bootcmdresp = 1;
 511                         lbs_deb_usbd(&cardp->udev->dev,
 512                                     "Received valid boot command response\n");
 513                 }
 514                 kfree_skb(skb);
 515                 if_usb_submit_rx_urb_fwload(priv);
 516                 return;
 517         }
 518
 519         syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
 520         if (!syncfwheader) {
 521                 lbs_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
 522                 kfree_skb(skb);
 523                 return;
 524         }
 525
 526         memcpy(syncfwheader, skb->data + IPFIELD_ALIGN_OFFSET,
 527                         sizeof(struct fwsyncheader));
 528
 529         if (!syncfwheader->cmd) {
 530                 /*
 531                 lbs_deb_usbd(&cardp->udev->dev,
 532                             "FW received Blk with correct CRC\n");
 533                 lbs_deb_usbd(&cardp->udev->dev,
 534                             "FW received Blk seqnum = %d\n",
 535                        syncfwheader->seqnum);
 536                 */
 537                 cardp->CRC_OK = 1;
 538         } else {
 539                 lbs_deb_usbd(&cardp->udev->dev,
 540                             "FW received Blk with CRC error\n");
 541                 cardp->CRC_OK = 0;
 542         }
 543
 544         kfree_skb(skb);
 545
 546         if (cardp->fwfinalblk) {
 547                 cardp->fwdnldover = 1;
 548                 goto exit;
 549         }
 550
 551         if_prog_firmware(priv);
 552
 553         if_usb_submit_rx_urb_fwload(priv);
 554 exit:
 555         kfree(syncfwheader);
 556
 557         return;
 558
 559 }
 560
 561 #define MRVDRV_MIN_PKT_LEN      30
 562
 563 static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
 564                                        struct usb_card_rec *cardp,
 565                                        wlan_private *priv)
 566 {
 567         if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE +
 568             MESSAGE_HEADER_LEN || recvlength < MRVDRV_MIN_PKT_LEN) {
 569                 lbs_deb_usbd(&cardp->udev->dev,
 570                             "Packet length is Invalid\n");
 571                 kfree_skb(skb);
 572                 return;
 573         }
 574
 575         skb_reserve(skb, IPFIELD_ALIGN_OFFSET);
 576         skb_put(skb, recvlength);
 577         skb_pull(skb, MESSAGE_HEADER_LEN);
 578         libertas_process_rxed_packet(priv, skb);
 579         priv->upld_len = (recvlength - MESSAGE_HEADER_LEN);
 580 }
 581
 582 static inline void process_cmdrequest(int recvlength, u8 *recvbuff,
 583                                       struct sk_buff *skb,
 584                                       struct usb_card_rec *cardp,
 585                                       wlan_private *priv)
 586 {
 587         u8 *cmdbuf;
 588         if (recvlength > MRVDRV_SIZE_OF_CMD_BUFFER) {
 589                 lbs_deb_usbd(&cardp->udev->dev,
 590                             "The receive buffer is too large\n");
 591                 kfree_skb(skb);
 592                 return;
 593         }
 594
 595         if (!in_interrupt())
 596                 BUG();
 597
 598         spin_lock(&priv->adapter->driver_lock);
 599         /* take care of cur_cmd = NULL case by reading the
 600          * data to clear the interrupt */
 601         if (!priv->adapter->cur_cmd) {
 602                 cmdbuf = priv->upld_buf;
 603                 priv->adapter->hisregcpy &= ~his_cmdupldrdy;
 604         } else
 605                 cmdbuf = priv->adapter->cur_cmd->bufvirtualaddr;
 606
 607         cardp->usb_int_cause |= his_cmdupldrdy;
 608         priv->upld_len = (recvlength - MESSAGE_HEADER_LEN);
 609         memcpy(cmdbuf, recvbuff + MESSAGE_HEADER_LEN,
 610                priv->upld_len);
 611
 612         kfree_skb(skb);
 613         libertas_interrupt(priv->dev);
 614         spin_unlock(&priv->adapter->driver_lock);
 615
 616         lbs_deb_usbd(&cardp->udev->dev,
 617                     "Wake up main thread to handle cmd response\n");
 618
 619         return;
 620 }
 621
 622 /**
 623  *  @brief This function reads of the packet into the upload buff,
 624  *  wake up the main thread and initialise the Rx callack.
 625  *
 626  *  @param urb          pointer to struct urb
 627  *  @return             N/A
 628  */
 629 static void if_usb_receive(struct urb *urb)
 630 {
 631         struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
 632         wlan_private *priv = rinfo->priv;
 633         struct sk_buff *skb = rinfo->skb;
 634         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
 635
 636         int recvlength = urb->actual_length;
 637         u8 *recvbuff = NULL;
 638         u32 recvtype;
 639
 640         lbs_deb_enter(LBS_DEB_USB);
 641
 642         if (recvlength) {
 643                 if (urb->status) {
 644                         lbs_deb_usbd(&cardp->udev->dev,
 645                                     "URB status is failed\n");
 646                         kfree_skb(skb);
 647                         goto setup_for_next;
 648                 }
 649
 650                 recvbuff = skb->data + IPFIELD_ALIGN_OFFSET;
 651                 memcpy(&recvtype, recvbuff, sizeof(u32));
 652                 lbs_deb_usbd(&cardp->udev->dev,
 653                             "Recv length = 0x%x\n", recvlength);
 654                 lbs_deb_usbd(&cardp->udev->dev,
 655                             "Receive type = 0x%X\n", recvtype);
 656                 recvtype = le32_to_cpu(recvtype);
 657                 lbs_deb_usbd(&cardp->udev->dev,
 658                             "Receive type after = 0x%X\n", recvtype);
 659         } else if (urb->status)
 660                 goto rx_exit;
 661
 662
 663         switch (recvtype) {
 664         case CMD_TYPE_DATA:
 665                 process_cmdtypedata(recvlength, skb, cardp, priv);
 666                 break;
 667
 668         case CMD_TYPE_REQUEST:
 669                 process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
 670                 break;
 671
 672         case CMD_TYPE_INDICATION:
 673                 /* Event cause handling */
 674                 spin_lock(&priv->adapter->driver_lock);
 675                 cardp->usb_event_cause = *(u32 *) (recvbuff + MESSAGE_HEADER_LEN);
 676                 lbs_deb_usbd(&cardp->udev->dev,"**EVENT** 0x%X\n",
 677                             cardp->usb_event_cause);
 678                 if (cardp->usb_event_cause & 0xffff0000) {
 679                         libertas_send_tx_feedback(priv);
 680                         spin_unlock(&priv->adapter->driver_lock);
 681                         break;
 682                 }
 683                 cardp->usb_event_cause = le32_to_cpu(cardp->usb_event_cause) << 3;
 684                 cardp->usb_int_cause |= his_cardevent;
 685                 kfree_skb(skb);
 686                 libertas_interrupt(priv->dev);
 687                 spin_unlock(&priv->adapter->driver_lock);
 688                 goto rx_exit;
 689         default:
 690                 kfree_skb(skb);
 691                 break;
 692         }
 693
 694 setup_for_next:
 695         if_usb_submit_rx_urb(priv);
 696 rx_exit:
 697         lbs_deb_leave(LBS_DEB_USB);
 698 }
 699
 700 /**
 701  *  @brief This function downloads data to FW
 702  *  @param priv         pointer to wlan_private structure
 703  *  @param type         type of data
 704  *  @param buf          pointer to data buffer
 705  *  @param len          number of bytes
 706  *  @return             0 or -1
 707  */
 708 static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb)
 709 {
 710         int ret = -1;
 711         u32 tmp;
 712         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
 713
 714         lbs_deb_usbd(&cardp->udev->dev,"*** type = %u\n", type);
 715         lbs_deb_usbd(&cardp->udev->dev,"size after = %d\n", nb);
 716
 717         if (type == MVMS_CMD) {
 718                 tmp = cpu_to_le32(CMD_TYPE_REQUEST);
 719                 priv->dnld_sent = DNLD_CMD_SENT;
 720                 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
 721                        MESSAGE_HEADER_LEN);
 722
 723         } else {
 724                 tmp = cpu_to_le32(CMD_TYPE_DATA);
 725                 priv->dnld_sent = DNLD_DATA_SENT;
 726                 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
 727                        MESSAGE_HEADER_LEN);
 728         }
 729
 730         memcpy((cardp->bulk_out_buffer + MESSAGE_HEADER_LEN), payload, nb);
 731
 732         ret =
 733             usb_tx_block(priv, cardp->bulk_out_buffer, nb + MESSAGE_HEADER_LEN);
 734
 735         return ret;
 736 }
 737
 738 /* called with adapter->driver_lock held */
 739 static int if_usb_get_int_status(wlan_private * priv, u8 * ireg)
 740 {
 741         struct usb_card_rec *cardp = priv->card;
 742
 743         *ireg = cardp->usb_int_cause;
 744         cardp->usb_int_cause = 0;
 745
 746         lbs_deb_usbd(&cardp->udev->dev,"Int cause is 0x%X\n", *ireg);
 747
 748         return 0;
 749 }
 750
 751 static int if_usb_read_event_cause(wlan_private * priv)
 752 {
 753         struct usb_card_rec *cardp = priv->card;
 754         priv->adapter->eventcause = cardp->usb_event_cause;
 755         /* Re-submit rx urb here to avoid event lost issue */
 756         if_usb_submit_rx_urb(priv);
 757         return 0;
 758 }
 759
 760 static int if_usb_reset_device(wlan_private *priv)
 761 {
 762         int ret;
 763
 764         lbs_deb_enter(LBS_DEB_USB);
 765         ret = libertas_prepare_and_send_command(priv, cmd_802_11_reset,
 766                                     cmd_act_halt, 0, 0, NULL);
 767         msleep_interruptible(10);
 768
 769         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 770         return ret;
 771 }
 772
 773 static int if_usb_unregister_dev(wlan_private * priv)
 774 {
 775         int ret = 0;
 776
 777         /* Need to send a Reset command to device before USB resources freed
 778          * and wlan_remove_card() called, then device can handle FW download
 779          * again.
 780          */
 781         if (priv)
 782                 if_usb_reset_device(priv);
 783
 784         return ret;
 785 }
 786
 787
 788 /**
 789  *  @brief  This function register usb device and initialize parameter
 790  *  @param              priv pointer to wlan_private
 791  *  @return             0 or -1
 792  */
 793 static int if_usb_register_dev(wlan_private * priv)
 794 {
 795         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
 796
 797         lbs_deb_enter(LBS_DEB_USB);
 798
 799         cardp->priv = priv;
 800         cardp->eth_dev = priv->dev;
 801         priv->hotplug_device = &(cardp->udev->dev);
 802
 803         lbs_deb_usbd(&cardp->udev->dev, "udev pointer is at %p\n",
 804                     cardp->udev);
 805
 806         lbs_deb_leave(LBS_DEB_USB);
 807         return 0;
 808 }
 809
 810
 811
 812 static int if_usb_prog_firmware(wlan_private * priv)
 813 {
 814         struct usb_card_rec *cardp = priv->card;
 815         int i = 0;
 816         static int reset_count = 10;
 817         int ret = 0;
 818
 819         lbs_deb_enter(LBS_DEB_USB);
 820
 821         cardp->rinfo.priv = priv;
 822
 823 restart:
 824         if (if_usb_submit_rx_urb_fwload(priv) < 0) {
 825                 lbs_deb_usbd(&cardp->udev->dev, "URB submission is failed\n");
 826                 ret = -1;
 827                 goto done;
 828         }
 829
 830         cardp->bootcmdresp = 0;
 831         do {
 832                 int j = 0;
 833                 i++;
 834                 /* Issue Boot command = 1, Boot from Download-FW */
 835                 if_usb_issue_boot_command(priv, BOOT_CMD_FW_BY_USB);
 836                 /* wait for command response */
 837                 do {
 838                         j++;
 839                         msleep_interruptible(100);
 840                 } while (cardp->bootcmdresp == 0 && j < 10);
 841         } while (cardp->bootcmdresp == 0 && i < 5);
 842
 843         if (cardp->bootcmdresp == 0) {
 844                 if (--reset_count >= 0) {
 845                         libertas_do_reset(priv);
 846                         goto restart;
 847                 }
 848                 return -1;
 849         }
 850
 851         i = 0;
 852         priv->adapter->fw_ready = 0;
 853
 854         cardp->totalbytes = 0;
 855         cardp->fwlastblksent = 0;
 856         cardp->CRC_OK = 1;
 857         cardp->fwdnldover = 0;
 858         cardp->fwseqnum = -1;
 859         cardp->totalbytes = 0;
 860         cardp->fwfinalblk = 0;
 861
 862         if_prog_firmware(priv);
 863
 864         do {
 865                 lbs_deb_usbd(&cardp->udev->dev,"Wlan sched timeout\n");
 866                 i++;
 867                 msleep_interruptible(100);
 868                 if (priv->adapter->surpriseremoved || i >= 20)
 869                         break;
 870         } while (!cardp->fwdnldover);
 871
 872         if (!cardp->fwdnldover) {
 873                 lbs_pr_info("failed to load fw, resetting device!\n");
 874                 if (--reset_count >= 0) {
 875                         libertas_do_reset(priv);
 876                         goto restart;
 877                 }
 878
 879                 lbs_pr_info("FW download failure, time = %d ms\n", i * 100);
 880                 ret = -1;
 881                 goto done;
 882         }
 883
 884         if_usb_submit_rx_urb(priv);
 885
 886         /* Delay 200 ms to waiting for the FW ready */
 887         msleep_interruptible(200);
 888
 889         priv->adapter->fw_ready = 1;
 890
 891 done:
 892         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 893         return ret;
 894 }
 895
 896 #ifdef CONFIG_PM
 897 static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)
 898 {
 899         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 900         wlan_private *priv = cardp->priv;
 901
 902         lbs_deb_enter(LBS_DEB_USB);
 903
 904         if (priv->adapter->psstate != PS_STATE_FULL_POWER)
 905                 return -1;
 906
 907         netif_device_detach(cardp->eth_dev);
 908         netif_device_detach(priv->mesh_dev);
 909
 910         /* Unlink tx & rx urb */
 911         usb_kill_urb(cardp->tx_urb);
 912         usb_kill_urb(cardp->rx_urb);
 913
 914         cardp->rx_urb_recall = 1;
 915
 916         lbs_deb_leave(LBS_DEB_USB);
 917         return 0;
 918 }
 919
 920 static int if_usb_resume(struct usb_interface *intf)
 921 {
 922         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 923         wlan_private *priv = cardp->priv;
 924
 925         lbs_deb_enter(LBS_DEB_USB);
 926
 927         cardp->rx_urb_recall = 0;
 928
 929         if_usb_submit_rx_urb(cardp->priv);
 930
 931         netif_device_attach(cardp->eth_dev);
 932         netif_device_attach(priv->mesh_dev);
 933
 934         lbs_deb_leave(LBS_DEB_USB);
 935         return 0;
 936 }
 937 #else
 938 #define if_usb_suspend NULL
 939 #define if_usb_resume NULL
 940 #endif
 941
 942 static struct usb_driver if_usb_driver = {
 943         /* driver name */
 944         .name = usbdriver_name,
 945         /* probe function name */
 946         .probe = if_usb_probe,
 947         /* disconnect function  name */
 948         .disconnect = if_usb_disconnect,
 949         /* device signature table */
 950         .id_table = if_usb_table,
 951         .suspend = if_usb_suspend,
 952         .resume = if_usb_resume,
 953 };
 954
 955 static int if_usb_init_module(void)
 956 {
 957         int ret = 0;
 958
 959         lbs_deb_enter(LBS_DEB_MAIN);
 960
 961         if (libertas_fw_name == NULL) {
 962                 libertas_fw_name = default_fw_name;
 963         }
 964
 965         ret = usb_register(&if_usb_driver);
 966
 967         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
 968         return ret;
 969 }
 970
 971 static void if_usb_exit_module(void)
 972 {
 973         struct usb_card_rec *cardp, *cardp_temp;
 974
 975         lbs_deb_enter(LBS_DEB_MAIN);
 976
 977         list_for_each_entry_safe(cardp, cardp_temp, &usb_devices, list)
 978                 if_usb_reset_device((wlan_private *) cardp->priv);
 979
 980         /* API unregisters the driver from USB subsystem */
 981         usb_deregister(&if_usb_driver);
 982
 983         lbs_deb_leave(LBS_DEB_MAIN);
 984 }
 985
 986 module_init(if_usb_init_module);
 987 module_exit(if_usb_exit_module);
 988
 989 MODULE_DESCRIPTION("8388 USB WLAN Driver");
 990 MODULE_AUTHOR("Marvell International Ltd.");
 991 MODULE_LICENSE("GPL");