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/firmware.h>
   6 #include <linux/netdevice.h>
   7 #include <linux/usb.h>
   8
   9 #include "host.h"
  10 #include "sbi.h"
  11 #include "decl.h"
  12 #include "defs.h"
  13 #include "dev.h"
  14 #include "if_usb.h"
  15
  16 #define MESSAGE_HEADER_LEN      4
  17
  18 static const char usbdriver_name[] = "usb8xxx";
  19
  20 #define MAX_DEVS 5
  21 static struct net_device *libertas_devs[MAX_DEVS];
  22 static int libertas_found = 0;
  23
  24 static struct usb_device_id if_usb_table[] = {
  25         /* Enter the device signature inside */
  26         { USB_DEVICE(0x1286, 0x2001) },
  27         { USB_DEVICE(0x05a3, 0x8388) },
  28         {}      /* Terminating entry */
  29 };
  30
  31 MODULE_DEVICE_TABLE(usb, if_usb_table);
  32
  33 static void if_usb_receive(struct urb *urb);
  34 static void if_usb_receive_fwload(struct urb *urb);
  35 static int reset_device(wlan_private *priv);
  36
  37 /**
  38  *  @brief  call back function to handle the status of the URB
  39  *  @param urb          pointer to urb structure
  40  *  @return             N/A
  41  */
  42 static void if_usb_write_bulk_callback(struct urb *urb)
  43 {
  44         wlan_private *priv = (wlan_private *) (urb->context);
  45         wlan_adapter *adapter = priv->adapter;
  46         struct net_device *dev = priv->wlan_dev.netdev;
  47
  48         /* handle the transmission complete validations */
  49
  50         if (urb->status != 0) {
  51                 /* print the failure status number for debug */
  52                 lbs_pr_info("URB in failure status\n");
  53         } else {
  54                 /*
  55                 lbs_deb_usbd(&urb->dev->dev, "URB status is successfull\n");
  56                 lbs_deb_usbd(&urb->dev->dev, "Actual length transmitted %d\n",
  57                        urb->actual_length);
  58                 */
  59                 priv->wlan_dev.dnld_sent = DNLD_RES_RECEIVED;
  60                 /* Wake main thread if commands are pending */
  61                 if (!adapter->cur_cmd)
  62                         wake_up_interruptible(&priv->mainthread.waitq);
  63                 if ((adapter->connect_status == libertas_connected)) {
  64                         netif_wake_queue(dev);
  65                         netif_wake_queue(priv->mesh_dev);
  66                 }
  67         }
  68
  69         return;
  70 }
  71
  72 /**
  73  *  @brief  free tx/rx urb, skb and rx buffer
  74  *  @param cardp        pointer usb_card_rec
  75  *  @return             N/A
  76  */
  77 void if_usb_free(struct usb_card_rec *cardp)
  78 {
  79         lbs_deb_enter(LBS_DEB_USB);
  80
  81         /* Unlink tx & rx urb */
  82         usb_kill_urb(cardp->tx_urb);
  83         usb_kill_urb(cardp->rx_urb);
  84
  85         usb_free_urb(cardp->tx_urb);
  86         cardp->tx_urb = NULL;
  87
  88         usb_free_urb(cardp->rx_urb);
  89         cardp->rx_urb = NULL;
  90
  91         kfree(cardp->bulk_out_buffer);
  92         cardp->bulk_out_buffer = NULL;
  93
  94         lbs_deb_leave(LBS_DEB_USB);
  95 }
  96
  97 /**
  98  *  @brief sets the configuration values
  99  *  @param ifnum        interface number
 100  *  @param id           pointer to usb_device_id
 101  *  @return             0 on success, error code on failure
 102  */
 103 static int if_usb_probe(struct usb_interface *intf,
 104                         const struct usb_device_id *id)
 105 {
 106         struct usb_device *udev;
 107         struct usb_host_interface *iface_desc;
 108         struct usb_endpoint_descriptor *endpoint;
 109         wlan_private *priv;
 110         struct usb_card_rec *usb_cardp;
 111         int i;
 112
 113         udev = interface_to_usbdev(intf);
 114
 115         usb_cardp = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
 116         if (!usb_cardp) {
 117                 lbs_pr_err("Out of memory allocating private data.\n");
 118                 goto error;
 119         }
 120
 121         usb_cardp->udev = udev;
 122         iface_desc = intf->cur_altsetting;
 123
 124         lbs_deb_usbd(&udev->dev, "bcdUSB = 0x%X bDeviceClass = 0x%X"
 125                " bDeviceSubClass = 0x%X, bDeviceProtocol = 0x%X\n",
 126                udev->descriptor.bcdUSB,
 127                udev->descriptor.bDeviceClass,
 128                udev->descriptor.bDeviceSubClass,
 129                udev->descriptor.bDeviceProtocol);
 130
 131         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 132                 endpoint = &iface_desc->endpoint[i].desc;
 133                 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
 134                     && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 135                         USB_ENDPOINT_XFER_BULK)) {
 136                         /* we found a bulk in endpoint */
 137                         lbs_deb_usbd(&udev->dev, "Bulk in size is %d\n",
 138                                endpoint->wMaxPacketSize);
 139                         if (!
 140                             (usb_cardp->rx_urb =
 141                              usb_alloc_urb(0, GFP_KERNEL))) {
 142                                 lbs_deb_usbd(&udev->dev,
 143                                        "Rx URB allocation failed\n");
 144                                 goto dealloc;
 145                         }
 146                         usb_cardp->rx_urb_recall = 0;
 147
 148                         usb_cardp->bulk_in_size =
 149                             endpoint->wMaxPacketSize;
 150                         usb_cardp->bulk_in_endpointAddr =
 151                             (endpoint->
 152                              bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 153                         lbs_deb_usbd(&udev->dev, "in_endpoint = %d\n",
 154                                endpoint->bEndpointAddress);
 155                 }
 156
 157                 if (((endpoint->
 158                       bEndpointAddress & USB_ENDPOINT_DIR_MASK) ==
 159                      USB_DIR_OUT)
 160                     && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 161                         USB_ENDPOINT_XFER_BULK)) {
 162                         /* We found bulk out endpoint */
 163                         if (!
 164                             (usb_cardp->tx_urb =
 165                              usb_alloc_urb(0, GFP_KERNEL))) {
 166                                 lbs_deb_usbd(&udev->dev,
 167                                        "Tx URB allocation failed\n");
 168                                 goto dealloc;
 169                         }
 170
 171                         usb_cardp->bulk_out_size =
 172                             endpoint->wMaxPacketSize;
 173                         lbs_deb_usbd(&udev->dev,
 174                                     "Bulk out size is %d\n",
 175                                     endpoint->wMaxPacketSize);
 176                         usb_cardp->bulk_out_endpointAddr =
 177                             endpoint->bEndpointAddress;
 178                         lbs_deb_usbd(&udev->dev, "out_endpoint = %d\n",
 179                                     endpoint->bEndpointAddress);
 180                         usb_cardp->bulk_out_buffer =
 181                             kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE,
 182                                     GFP_KERNEL);
 183
 184                         if (!usb_cardp->bulk_out_buffer) {
 185                                 lbs_deb_usbd(&udev->dev,
 186                                        "Could not allocate buffer\n");
 187                                 goto dealloc;
 188                         }
 189                 }
 190         }
 191
 192
 193         /* At this point wlan_add_card() will be called.  Don't worry
 194          * about keeping pwlanpriv around since it will be set on our
 195          * usb device data in -> add() -> libertas_sbi_register_dev().
 196          */
 197         if (!(priv = wlan_add_card(usb_cardp)))
 198                 goto dealloc;
 199
 200         if (wlan_add_mesh(priv))
 201                 goto err_add_mesh;
 202
 203         if (libertas_activate_card(priv))
 204                 goto err_activate_card;
 205
 206         if (libertas_found < MAX_DEVS) {
 207                 libertas_devs[libertas_found] = priv->wlan_dev.netdev;
 208                 libertas_found++;
 209         }
 210
 211         usb_get_dev(udev);
 212         usb_set_intfdata(intf, usb_cardp);
 213
 214         /*
 215          * return card structure, which can be got back in the
 216          * diconnect function as the ptr
 217          * argument.
 218          */
 219         return 0;
 220
 221 err_activate_card:
 222         unregister_netdev(priv->mesh_dev);
 223         free_netdev(priv->mesh_dev);
 224 err_add_mesh:
 225         free_netdev(priv->wlan_dev.netdev);
 226         kfree(priv->adapter);
 227 dealloc:
 228         if_usb_free(usb_cardp);
 229
 230 error:
 231         return -ENOMEM;
 232 }
 233
 234 /**
 235  *  @brief free resource and cleanup
 236  *  @param udev         pointer to usb_device
 237  *  @param ptr          pointer to usb_cardp
 238  *  @return             N/A
 239  */
 240 static void if_usb_disconnect(struct usb_interface *intf)
 241 {
 242         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 243         wlan_private *priv = (wlan_private *) cardp->priv;
 244         wlan_adapter *adapter = NULL;
 245         int i;
 246
 247         adapter = priv->adapter;
 248
 249         /*
 250          * Update Surprise removed to TRUE
 251          */
 252         adapter->surpriseremoved = 1;
 253
 254         for (i = 0; i<libertas_found; i++) {
 255                 if (libertas_devs[i]==priv->wlan_dev.netdev) {
 256                         libertas_devs[i] = libertas_devs[--libertas_found];
 257                         libertas_devs[libertas_found] = NULL ;
 258                         break;
 259                 }
 260         }
 261
 262         /* card is removed and we can call wlan_remove_card */
 263         lbs_deb_usbd(&cardp->udev->dev, "call remove card\n");
 264         wlan_remove_mesh(priv);
 265         wlan_remove_card(priv);
 266
 267         /* Unlink and free urb */
 268         if_usb_free(cardp);
 269
 270         usb_set_intfdata(intf, NULL);
 271         usb_put_dev(interface_to_usbdev(intf));
 272
 273         return;
 274 }
 275
 276 /**
 277  *  @brief  This function download FW
 278  *  @param priv         pointer to wlan_private
 279  *  @return             0
 280  */
 281 static int if_prog_firmware(wlan_private * priv)
 282 {
 283         struct usb_card_rec *cardp = priv->wlan_dev.card;
 284         struct FWData *fwdata;
 285         struct fwheader *fwheader;
 286         u8 *firmware = priv->firmware->data;
 287
 288         fwdata = kmalloc(sizeof(struct FWData), GFP_ATOMIC);
 289
 290         if (!fwdata)
 291                 return -1;
 292
 293         fwheader = &fwdata->fwheader;
 294
 295         if (!cardp->CRC_OK) {
 296                 cardp->totalbytes = cardp->fwlastblksent;
 297                 cardp->fwseqnum = cardp->lastseqnum - 1;
 298         }
 299
 300         /*
 301         lbs_deb_usbd(&cardp->udev->dev, "totalbytes = %d\n",
 302                     cardp->totalbytes);
 303         */
 304
 305         memcpy(fwheader, &firmware[cardp->totalbytes],
 306                sizeof(struct fwheader));
 307
 308         cardp->fwlastblksent = cardp->totalbytes;
 309         cardp->totalbytes += sizeof(struct fwheader);
 310
 311         /* lbs_deb_usbd(&cardp->udev->dev,"Copy Data\n"); */
 312         memcpy(fwdata->data, &firmware[cardp->totalbytes],
 313                fwdata->fwheader.datalength);
 314
 315         /*
 316         lbs_deb_usbd(&cardp->udev->dev,
 317                     "Data length = %d\n", fwdata->fwheader.datalength);
 318         */
 319
 320         cardp->fwseqnum = cardp->fwseqnum + 1;
 321
 322         fwdata->seqnum = cardp->fwseqnum;
 323         cardp->lastseqnum = fwdata->seqnum;
 324         cardp->totalbytes += fwdata->fwheader.datalength;
 325
 326         if (fwheader->dnldcmd == FW_HAS_DATA_TO_RECV) {
 327                 /*
 328                 lbs_deb_usbd(&cardp->udev->dev, "There is data to follow\n");
 329                 lbs_deb_usbd(&cardp->udev->dev,
 330                             "seqnum = %d totalbytes = %d\n", cardp->fwseqnum,
 331                             cardp->totalbytes);
 332                 */
 333                 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
 334                 usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
 335
 336         } else if (fwdata->fwheader.dnldcmd == FW_HAS_LAST_BLOCK) {
 337                 /*
 338                 lbs_deb_usbd(&cardp->udev->dev,
 339                             "Host has finished FW downloading\n");
 340                 lbs_deb_usbd(&cardp->udev->dev,
 341                             "Donwloading FW JUMP BLOCK\n");
 342                 */
 343                 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
 344                 usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
 345                 cardp->fwfinalblk = 1;
 346         }
 347
 348         /*
 349         lbs_deb_usbd(&cardp->udev->dev,
 350                     "The firmware download is done size is %d\n",
 351                     cardp->totalbytes);
 352         */
 353
 354         kfree(fwdata);
 355
 356         return 0;
 357 }
 358
 359 static int libertas_do_reset(wlan_private *priv)
 360 {
 361         int ret;
 362         struct usb_card_rec *cardp = priv->wlan_dev.card;
 363
 364         lbs_deb_enter(LBS_DEB_USB);
 365
 366         ret = usb_reset_device(cardp->udev);
 367         if (!ret) {
 368                 msleep(10);
 369                 reset_device(priv);
 370                 msleep(10);
 371         }
 372
 373         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 374
 375         return ret;
 376 }
 377
 378 /**
 379  *  @brief This function transfer the data to the device.
 380  *  @param priv         pointer to wlan_private
 381  *  @param payload      pointer to payload data
 382  *  @param nb           data length
 383  *  @return             0 or -1
 384  */
 385 int usb_tx_block(wlan_private * priv, u8 * payload, u16 nb)
 386 {
 387         /* pointer to card structure */
 388         struct usb_card_rec *cardp = priv->wlan_dev.card;
 389         int ret = -1;
 390
 391         /* check if device is removed */
 392         if (priv->adapter->surpriseremoved) {
 393                 lbs_deb_usbd(&cardp->udev->dev, "Device removed\n");
 394                 goto tx_ret;
 395         }
 396
 397         usb_fill_bulk_urb(cardp->tx_urb, cardp->udev,
 398                           usb_sndbulkpipe(cardp->udev,
 399                                           cardp->bulk_out_endpointAddr),
 400                           payload, nb, if_usb_write_bulk_callback, priv);
 401
 402         cardp->tx_urb->transfer_flags |= URB_ZERO_PACKET;
 403
 404         if ((ret = usb_submit_urb(cardp->tx_urb, GFP_ATOMIC))) {
 405                 /*  transfer failed */
 406                 lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb failed\n");
 407                 ret = -1;
 408         } else {
 409                 /* lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb success\n"); */
 410                 ret = 0;
 411         }
 412
 413 tx_ret:
 414         return ret;
 415 }
 416
 417 static int __if_usb_submit_rx_urb(wlan_private * priv,
 418                                   void (*callbackfn)
 419                                   (struct urb *urb))
 420 {
 421         struct usb_card_rec *cardp = priv->wlan_dev.card;
 422         struct sk_buff *skb;
 423         struct read_cb_info *rinfo = &cardp->rinfo;
 424         int ret = -1;
 425
 426         if (!(skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE))) {
 427                 lbs_pr_err("No free skb\n");
 428                 goto rx_ret;
 429         }
 430
 431         rinfo->skb = skb;
 432
 433         /* Fill the receive configuration URB and initialise the Rx call back */
 434         usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
 435                           usb_rcvbulkpipe(cardp->udev,
 436                                           cardp->bulk_in_endpointAddr),
 437                           (void *) (skb->tail + (size_t) IPFIELD_ALIGN_OFFSET),
 438                           MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn,
 439                           rinfo);
 440
 441         cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;
 442
 443         /* lbs_deb_usbd(&cardp->udev->dev, "Pointer for rx_urb %p\n", cardp->rx_urb); */
 444         if ((ret = usb_submit_urb(cardp->rx_urb, GFP_ATOMIC))) {
 445                 /* handle failure conditions */
 446                 lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB failed\n");
 447                 ret = -1;
 448         } else {
 449                 /* lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB success\n"); */
 450                 ret = 0;
 451         }
 452
 453 rx_ret:
 454         return ret;
 455 }
 456
 457 static inline int if_usb_submit_rx_urb_fwload(wlan_private * priv)
 458 {
 459         return __if_usb_submit_rx_urb(priv, &if_usb_receive_fwload);
 460 }
 461
 462 static inline int if_usb_submit_rx_urb(wlan_private * priv)
 463 {
 464         return __if_usb_submit_rx_urb(priv, &if_usb_receive);
 465 }
 466
 467 static void if_usb_receive_fwload(struct urb *urb)
 468 {
 469         struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
 470         wlan_private *priv = rinfo->priv;
 471         struct sk_buff *skb = rinfo->skb;
 472         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
 473         struct fwsyncheader *syncfwheader;
 474         struct bootcmdrespStr bootcmdresp;
 475
 476         if (urb->status) {
 477                 lbs_deb_usbd(&cardp->udev->dev,
 478                             "URB status is failed during fw load\n");
 479                 kfree_skb(skb);
 480                 return;
 481         }
 482
 483         if (cardp->bootcmdresp == 0) {
 484                 memcpy (&bootcmdresp, skb->data + IPFIELD_ALIGN_OFFSET,
 485                         sizeof(bootcmdresp));
 486                 if (cardp->udev->descriptor.bcdDevice < 0x3106) {
 487                         kfree_skb(skb);
 488                         if_usb_submit_rx_urb_fwload(priv);
 489                         cardp->bootcmdresp = 1;
 490                         lbs_deb_usbd(&cardp->udev->dev,
 491                                     "Received valid boot command response\n");
 492                         return;
 493                 }
 494                 if (bootcmdresp.u32magicnumber != BOOT_CMD_MAGIC_NUMBER) {
 495                         lbs_pr_info(
 496                                 "boot cmd response wrong magic number (0x%x)\n",
 497                                 bootcmdresp.u32magicnumber);
 498                 } else if (bootcmdresp.u8cmd_tag != BOOT_CMD_FW_BY_USB) {
 499                         lbs_pr_info(
 500                                 "boot cmd response cmd_tag error (%d)\n",
 501                                 bootcmdresp.u8cmd_tag);
 502                 } else if (bootcmdresp.u8result != BOOT_CMD_RESP_OK) {
 503                         lbs_pr_info(
 504                                 "boot cmd response result error (%d)\n",
 505                                 bootcmdresp.u8result);
 506                 } else {
 507                         cardp->bootcmdresp = 1;
 508                         lbs_deb_usbd(&cardp->udev->dev,
 509                                     "Received valid boot command response\n");
 510                 }
 511                 kfree_skb(skb);
 512                 if_usb_submit_rx_urb_fwload(priv);
 513                 return;
 514         }
 515
 516         syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
 517         if (!syncfwheader) {
 518                 lbs_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
 519                 kfree_skb(skb);
 520                 return;
 521         }
 522
 523         memcpy(syncfwheader, skb->data + IPFIELD_ALIGN_OFFSET,
 524                         sizeof(struct fwsyncheader));
 525
 526         if (!syncfwheader->cmd) {
 527                 /*
 528                 lbs_deb_usbd(&cardp->udev->dev,
 529                             "FW received Blk with correct CRC\n");
 530                 lbs_deb_usbd(&cardp->udev->dev,
 531                             "FW received Blk seqnum = %d\n",
 532                        syncfwheader->seqnum);
 533                 */
 534                 cardp->CRC_OK = 1;
 535         } else {
 536                 lbs_deb_usbd(&cardp->udev->dev,
 537                             "FW received Blk with CRC error\n");
 538                 cardp->CRC_OK = 0;
 539         }
 540
 541         kfree_skb(skb);
 542
 543         if (cardp->fwfinalblk) {
 544                 cardp->fwdnldover = 1;
 545                 goto exit;
 546         }
 547
 548         if_prog_firmware(priv);
 549
 550         if_usb_submit_rx_urb_fwload(priv);
 551 exit:
 552         kfree(syncfwheader);
 553
 554         return;
 555
 556 }
 557
 558 #define MRVDRV_MIN_PKT_LEN      30
 559
 560 static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
 561                                        struct usb_card_rec *cardp,
 562                                        wlan_private *priv)
 563 {
 564         if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE +
 565             MESSAGE_HEADER_LEN || recvlength < MRVDRV_MIN_PKT_LEN) {
 566                 lbs_deb_usbd(&cardp->udev->dev,
 567                             "Packet length is Invalid\n");
 568                 kfree_skb(skb);
 569                 return;
 570         }
 571
 572         skb_reserve(skb, IPFIELD_ALIGN_OFFSET);
 573         skb_put(skb, recvlength);
 574         skb_pull(skb, MESSAGE_HEADER_LEN);
 575         libertas_process_rxed_packet(priv, skb);
 576         priv->wlan_dev.upld_len = (recvlength - MESSAGE_HEADER_LEN);
 577 }
 578
 579 static inline void process_cmdrequest(int recvlength, u8 *recvbuff,
 580                                       struct sk_buff *skb,
 581                                       struct usb_card_rec *cardp,
 582                                       wlan_private *priv)
 583 {
 584         u8 *cmdbuf;
 585         if (recvlength > MRVDRV_SIZE_OF_CMD_BUFFER) {
 586                 lbs_deb_usbd(&cardp->udev->dev,
 587                             "The receive buffer is too large\n");
 588                 kfree_skb(skb);
 589                 return;
 590         }
 591
 592         if (!in_interrupt())
 593                 BUG();
 594
 595         spin_lock(&priv->adapter->driver_lock);
 596         /* take care of cur_cmd = NULL case by reading the
 597          * data to clear the interrupt */
 598         if (!priv->adapter->cur_cmd) {
 599                 cmdbuf = priv->wlan_dev.upld_buf;
 600                 priv->adapter->hisregcpy &= ~his_cmdupldrdy;
 601         } else
 602                 cmdbuf = priv->adapter->cur_cmd->bufvirtualaddr;
 603
 604         cardp->usb_int_cause |= his_cmdupldrdy;
 605         priv->wlan_dev.upld_len = (recvlength - MESSAGE_HEADER_LEN);
 606         memcpy(cmdbuf, recvbuff + MESSAGE_HEADER_LEN,
 607                priv->wlan_dev.upld_len);
 608
 609         kfree_skb(skb);
 610         libertas_interrupt(priv->wlan_dev.netdev);
 611         spin_unlock(&priv->adapter->driver_lock);
 612
 613         lbs_deb_usbd(&cardp->udev->dev,
 614                     "Wake up main thread to handle cmd response\n");
 615
 616         return;
 617 }
 618
 619 /**
 620  *  @brief This function reads of the packet into the upload buff,
 621  *  wake up the main thread and initialise the Rx callack.
 622  *
 623  *  @param urb          pointer to struct urb
 624  *  @return             N/A
 625  */
 626 static void if_usb_receive(struct urb *urb)
 627 {
 628         struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
 629         wlan_private *priv = rinfo->priv;
 630         struct sk_buff *skb = rinfo->skb;
 631         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
 632
 633         int recvlength = urb->actual_length;
 634         u8 *recvbuff = NULL;
 635         u32 recvtype;
 636
 637         lbs_deb_enter(LBS_DEB_USB);
 638
 639         if (recvlength) {
 640                 if (urb->status) {
 641                         lbs_deb_usbd(&cardp->udev->dev,
 642                                     "URB status is failed\n");
 643                         kfree_skb(skb);
 644                         goto setup_for_next;
 645                 }
 646
 647                 recvbuff = skb->data + IPFIELD_ALIGN_OFFSET;
 648                 memcpy(&recvtype, recvbuff, sizeof(u32));
 649                 lbs_deb_usbd(&cardp->udev->dev,
 650                             "Recv length = 0x%x\n", recvlength);
 651                 lbs_deb_usbd(&cardp->udev->dev,
 652                             "Receive type = 0x%X\n", recvtype);
 653                 recvtype = le32_to_cpu(recvtype);
 654                 lbs_deb_usbd(&cardp->udev->dev,
 655                             "Receive type after = 0x%X\n", recvtype);
 656         } else if (urb->status)
 657                 goto rx_exit;
 658
 659
 660         switch (recvtype) {
 661         case CMD_TYPE_DATA:
 662                 process_cmdtypedata(recvlength, skb, cardp, priv);
 663                 break;
 664
 665         case CMD_TYPE_REQUEST:
 666                 process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
 667                 break;
 668
 669         case CMD_TYPE_INDICATION:
 670                 /* Event cause handling */
 671                 spin_lock(&priv->adapter->driver_lock);
 672                 cardp->usb_event_cause = *(u32 *) (recvbuff + MESSAGE_HEADER_LEN);
 673                 lbs_deb_usbd(&cardp->udev->dev,"**EVENT** 0x%X\n",
 674                             cardp->usb_event_cause);
 675                 if (cardp->usb_event_cause & 0xffff0000) {
 676                         libertas_send_tx_feedback(priv);
 677                         spin_unlock(&priv->adapter->driver_lock);
 678                         break;
 679                 }
 680                 cardp->usb_event_cause = le32_to_cpu(cardp->usb_event_cause) << 3;
 681                 cardp->usb_int_cause |= his_cardevent;
 682                 kfree_skb(skb);
 683                 libertas_interrupt(priv->wlan_dev.netdev);
 684                 spin_unlock(&priv->adapter->driver_lock);
 685                 goto rx_exit;
 686         default:
 687                 kfree_skb(skb);
 688                 break;
 689         }
 690
 691 setup_for_next:
 692         if_usb_submit_rx_urb(priv);
 693 rx_exit:
 694         lbs_deb_leave(LBS_DEB_USB);
 695 }
 696
 697 /**
 698  *  @brief This function downloads data to FW
 699  *  @param priv         pointer to wlan_private structure
 700  *  @param type         type of data
 701  *  @param buf          pointer to data buffer
 702  *  @param len          number of bytes
 703  *  @return             0 or -1
 704  */
 705 int libertas_sbi_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb)
 706 {
 707         int ret = -1;
 708         u32 tmp;
 709         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
 710
 711         lbs_deb_usbd(&cardp->udev->dev,"*** type = %u\n", type);
 712         lbs_deb_usbd(&cardp->udev->dev,"size after = %d\n", nb);
 713
 714         if (type == MVMS_CMD) {
 715                 tmp = cpu_to_le32(CMD_TYPE_REQUEST);
 716                 priv->wlan_dev.dnld_sent = DNLD_CMD_SENT;
 717                 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
 718                        MESSAGE_HEADER_LEN);
 719
 720         } else {
 721                 tmp = cpu_to_le32(CMD_TYPE_DATA);
 722                 priv->wlan_dev.dnld_sent = DNLD_DATA_SENT;
 723                 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
 724                        MESSAGE_HEADER_LEN);
 725         }
 726
 727         memcpy((cardp->bulk_out_buffer + MESSAGE_HEADER_LEN), payload, nb);
 728
 729         ret =
 730             usb_tx_block(priv, cardp->bulk_out_buffer, nb + MESSAGE_HEADER_LEN);
 731
 732         return ret;
 733 }
 734
 735 /* called with adapter->driver_lock held */
 736 int libertas_sbi_get_int_status(wlan_private * priv, u8 * ireg)
 737 {
 738         struct usb_card_rec *cardp = priv->wlan_dev.card;
 739
 740         *ireg = cardp->usb_int_cause;
 741         cardp->usb_int_cause = 0;
 742
 743         lbs_deb_usbd(&cardp->udev->dev,"Int cause is 0x%X\n", *ireg);
 744
 745         return 0;
 746 }
 747
 748 int libertas_sbi_read_event_cause(wlan_private * priv)
 749 {
 750         struct usb_card_rec *cardp = priv->wlan_dev.card;
 751         priv->adapter->eventcause = cardp->usb_event_cause;
 752         /* Re-submit rx urb here to avoid event lost issue */
 753         if_usb_submit_rx_urb(priv);
 754         return 0;
 755 }
 756
 757 static int reset_device(wlan_private *priv)
 758 {
 759         int ret;
 760
 761         lbs_deb_enter(LBS_DEB_USB);
 762         ret = libertas_prepare_and_send_command(priv, cmd_802_11_reset,
 763                                     cmd_act_halt, 0, 0, NULL);
 764         msleep_interruptible(10);
 765
 766         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 767         return ret;
 768 }
 769
 770 int libertas_sbi_unregister_dev(wlan_private * priv)
 771 {
 772         int ret = 0;
 773
 774         /* Need to send a Reset command to device before USB resources freed
 775          * and wlan_remove_card() called, then device can handle FW download
 776          * again.
 777          */
 778         if (priv)
 779                 reset_device(priv);
 780
 781         return ret;
 782 }
 783
 784
 785 /**
 786  *  @brief  This function register usb device and initialize parameter
 787  *  @param              priv pointer to wlan_private
 788  *  @return             0 or -1
 789  */
 790 int libertas_sbi_register_dev(wlan_private * priv)
 791 {
 792         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
 793
 794         lbs_deb_enter(LBS_DEB_USB);
 795
 796         cardp->priv = priv;
 797         cardp->eth_dev = priv->wlan_dev.netdev;
 798         priv->hotplug_device = &(cardp->udev->dev);
 799
 800         SET_NETDEV_DEV(cardp->eth_dev, &(cardp->udev->dev));
 801         SET_NETDEV_DEV(priv->mesh_dev, &(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 int libertas_sbi_prog_firmware(wlan_private * priv)
 813 {
 814         struct usb_card_rec *cardp = priv->wlan_dev.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 /**
 956  *  @brief This function registers driver.
 957  *  @param add          pointer to add_card callback function
 958  *  @param remove       pointer to remove card callback function
 959  *  @param arg          pointer to call back function parameter
 960  *  @return             dummy success variable
 961  */
 962 int libertas_sbi_register(void)
 963 {
 964         /*
 965          * API registers the Marvell USB driver
 966          * to the USB system
 967          */
 968         usb_register(&if_usb_driver);
 969
 970         /* Return success to wlan layer */
 971         return 0;
 972 }
 973
 974 /**
 975  *  @brief This function removes usb driver.
 976  *  @return             N/A
 977  */
 978 void libertas_sbi_unregister(void)
 979 {
 980         int i;
 981
 982         for (i = 0; i<libertas_found; i++) {
 983                 wlan_private *priv = libertas_devs[i]->priv;
 984                 reset_device(priv);
 985         }
 986
 987         /* API unregisters the driver from USB subsystem */
 988         usb_deregister(&if_usb_driver);
 989 }