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 "decl.h"
  11 #include "defs.h"
  12 #include "dev.h"
  13 #include "if_usb.h"
  14
  15 #define MESSAGE_HEADER_LEN      4
  16
  17 static const char usbdriver_name[] = "usb8xxx";
  18
  19 #define MAX_DEVS 5
  20 static struct net_device *libertas_devs[MAX_DEVS];
  21 static int libertas_found = 0;
  22
  23 static struct usb_device_id if_usb_table[] = {
  24         /* Enter the device signature inside */
  25         { USB_DEVICE(0x1286, 0x2001) },
  26         { USB_DEVICE(0x05a3, 0x8388) },
  27         {}      /* Terminating entry */
  28 };
  29
  30 MODULE_DEVICE_TABLE(usb, if_usb_table);
  31
  32 static void if_usb_receive(struct urb *urb);
  33 static void if_usb_receive_fwload(struct urb *urb);
  34 static int reset_device(wlan_private *priv);
  35 static int if_usb_register_dev(wlan_private * priv);
  36 static int if_usb_unregister_dev(wlan_private *);
  37 static int if_usb_prog_firmware(wlan_private *);
  38 static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb);
  39 static int if_usb_get_int_status(wlan_private * priv, u8 *);
  40 static int if_usb_read_event_cause(wlan_private *);
  41
  42 /**
  43  *  @brief  call back function to handle the status of the URB
  44  *  @param urb          pointer to urb structure
  45  *  @return             N/A
  46  */
  47 static void if_usb_write_bulk_callback(struct urb *urb)
  48 {
  49         wlan_private *priv = (wlan_private *) (urb->context);
  50         wlan_adapter *adapter = priv->adapter;
  51         struct net_device *dev = priv->wlan_dev.netdev;
  52
  53         /* handle the transmission complete validations */
  54
  55         if (urb->status != 0) {
  56                 /* print the failure status number for debug */
  57                 lbs_pr_info("URB in failure status\n");
  58         } else {
  59                 /*
  60                 lbs_deb_usbd(&urb->dev->dev, "URB status is successfull\n");
  61                 lbs_deb_usbd(&urb->dev->dev, "Actual length transmitted %d\n",
  62                        urb->actual_length);
  63                 */
  64                 priv->wlan_dev.dnld_sent = DNLD_RES_RECEIVED;
  65                 /* Wake main thread if commands are pending */
  66                 if (!adapter->cur_cmd)
  67                         wake_up_interruptible(&priv->mainthread.waitq);
  68                 if ((adapter->connect_status == libertas_connected)) {
  69                         netif_wake_queue(dev);
  70                         netif_wake_queue(priv->mesh_dev);
  71                 }
  72         }
  73
  74         return;
  75 }
  76
  77 /**
  78  *  @brief  free tx/rx urb, skb and rx buffer
  79  *  @param cardp        pointer usb_card_rec
  80  *  @return             N/A
  81  */
  82 void if_usb_free(struct usb_card_rec *cardp)
  83 {
  84         lbs_deb_enter(LBS_DEB_USB);
  85
  86         /* Unlink tx & rx urb */
  87         usb_kill_urb(cardp->tx_urb);
  88         usb_kill_urb(cardp->rx_urb);
  89
  90         usb_free_urb(cardp->tx_urb);
  91         cardp->tx_urb = NULL;
  92
  93         usb_free_urb(cardp->rx_urb);
  94         cardp->rx_urb = NULL;
  95
  96         kfree(cardp->bulk_out_buffer);
  97         cardp->bulk_out_buffer = NULL;
  98
  99         lbs_deb_leave(LBS_DEB_USB);
 100 }
 101
 102 /**
 103  *  @brief sets the configuration values
 104  *  @param ifnum        interface number
 105  *  @param id           pointer to usb_device_id
 106  *  @return             0 on success, error code on failure
 107  */
 108 static int if_usb_probe(struct usb_interface *intf,
 109                         const struct usb_device_id *id)
 110 {
 111         struct usb_device *udev;
 112         struct usb_host_interface *iface_desc;
 113         struct usb_endpoint_descriptor *endpoint;
 114         wlan_private *priv;
 115         struct usb_card_rec *usb_cardp;
 116         int i;
 117
 118         udev = interface_to_usbdev(intf);
 119
 120         usb_cardp = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
 121         if (!usb_cardp) {
 122                 lbs_pr_err("Out of memory allocating private data.\n");
 123                 goto error;
 124         }
 125
 126         usb_cardp->udev = udev;
 127         iface_desc = intf->cur_altsetting;
 128
 129         lbs_deb_usbd(&udev->dev, "bcdUSB = 0x%X bDeviceClass = 0x%X"
 130                " bDeviceSubClass = 0x%X, bDeviceProtocol = 0x%X\n",
 131                udev->descriptor.bcdUSB,
 132                udev->descriptor.bDeviceClass,
 133                udev->descriptor.bDeviceSubClass,
 134                udev->descriptor.bDeviceProtocol);
 135
 136         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 137                 endpoint = &iface_desc->endpoint[i].desc;
 138                 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
 139                     && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 140                         USB_ENDPOINT_XFER_BULK)) {
 141                         /* we found a bulk in endpoint */
 142                         lbs_deb_usbd(&udev->dev, "Bulk in size is %d\n",
 143                                endpoint->wMaxPacketSize);
 144                         if (!
 145                             (usb_cardp->rx_urb =
 146                              usb_alloc_urb(0, GFP_KERNEL))) {
 147                                 lbs_deb_usbd(&udev->dev,
 148                                        "Rx URB allocation failed\n");
 149                                 goto dealloc;
 150                         }
 151                         usb_cardp->rx_urb_recall = 0;
 152
 153                         usb_cardp->bulk_in_size =
 154                             endpoint->wMaxPacketSize;
 155                         usb_cardp->bulk_in_endpointAddr =
 156                             (endpoint->
 157                              bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 158                         lbs_deb_usbd(&udev->dev, "in_endpoint = %d\n",
 159                                endpoint->bEndpointAddress);
 160                 }
 161
 162                 if (((endpoint->
 163                       bEndpointAddress & USB_ENDPOINT_DIR_MASK) ==
 164                      USB_DIR_OUT)
 165                     && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 166                         USB_ENDPOINT_XFER_BULK)) {
 167                         /* We found bulk out endpoint */
 168                         if (!
 169                             (usb_cardp->tx_urb =
 170                              usb_alloc_urb(0, GFP_KERNEL))) {
 171                                 lbs_deb_usbd(&udev->dev,
 172                                        "Tx URB allocation failed\n");
 173                                 goto dealloc;
 174                         }
 175
 176                         usb_cardp->bulk_out_size =
 177                             endpoint->wMaxPacketSize;
 178                         lbs_deb_usbd(&udev->dev,
 179                                     "Bulk out size is %d\n",
 180                                     endpoint->wMaxPacketSize);
 181                         usb_cardp->bulk_out_endpointAddr =
 182                             endpoint->bEndpointAddress;
 183                         lbs_deb_usbd(&udev->dev, "out_endpoint = %d\n",
 184                                     endpoint->bEndpointAddress);
 185                         usb_cardp->bulk_out_buffer =
 186                             kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE,
 187                                     GFP_KERNEL);
 188
 189                         if (!usb_cardp->bulk_out_buffer) {
 190                                 lbs_deb_usbd(&udev->dev,
 191                                        "Could not allocate buffer\n");
 192                                 goto dealloc;
 193                         }
 194                 }
 195         }
 196
 197
 198         /* At this point wlan_add_card() will be called.  Don't worry
 199          * about keeping pwlanpriv around since it will be set on our
 200          * usb device data in -> add() -> hw_register_dev() -> if_usb_register_dev.
 201          */
 202         if (!(priv = wlan_add_card(usb_cardp)))
 203                 goto dealloc;
 204
 205         if (wlan_add_mesh(priv))
 206                 goto err_add_mesh;
 207
 208         priv->hw_register_dev = if_usb_register_dev;
 209         priv->hw_unregister_dev = if_usb_unregister_dev;
 210         priv->hw_prog_firmware = if_usb_prog_firmware;
 211         priv->hw_host_to_card = if_usb_host_to_card;
 212         priv->hw_get_int_status = if_usb_get_int_status;
 213         priv->hw_read_event_cause = if_usb_read_event_cause;
 214
 215         if (libertas_activate_card(priv))
 216                 goto err_activate_card;
 217
 218         if (libertas_found < MAX_DEVS) {
 219                 libertas_devs[libertas_found] = priv->wlan_dev.netdev;
 220                 libertas_found++;
 221         }
 222
 223         usb_get_dev(udev);
 224         usb_set_intfdata(intf, usb_cardp);
 225
 226         /*
 227          * return card structure, which can be got back in the
 228          * diconnect function as the ptr
 229          * argument.
 230          */
 231         return 0;
 232
 233 err_activate_card:
 234         unregister_netdev(priv->mesh_dev);
 235         free_netdev(priv->mesh_dev);
 236 err_add_mesh:
 237         free_netdev(priv->wlan_dev.netdev);
 238         kfree(priv->adapter);
 239 dealloc:
 240         if_usb_free(usb_cardp);
 241
 242 error:
 243         return -ENOMEM;
 244 }
 245
 246 /**
 247  *  @brief free resource and cleanup
 248  *  @param udev         pointer to usb_device
 249  *  @param ptr          pointer to usb_cardp
 250  *  @return             N/A
 251  */
 252 static void if_usb_disconnect(struct usb_interface *intf)
 253 {
 254         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 255         wlan_private *priv = (wlan_private *) cardp->priv;
 256         wlan_adapter *adapter = NULL;
 257         int i;
 258
 259         adapter = priv->adapter;
 260
 261         /*
 262          * Update Surprise removed to TRUE
 263          */
 264         adapter->surpriseremoved = 1;
 265
 266         for (i = 0; i<libertas_found; i++) {
 267                 if (libertas_devs[i]==priv->wlan_dev.netdev) {
 268                         libertas_devs[i] = libertas_devs[--libertas_found];
 269                         libertas_devs[libertas_found] = NULL ;
 270                         break;
 271                 }
 272         }
 273
 274         /* card is removed and we can call wlan_remove_card */
 275         lbs_deb_usbd(&cardp->udev->dev, "call remove card\n");
 276         wlan_remove_mesh(priv);
 277         wlan_remove_card(priv);
 278
 279         /* Unlink and free urb */
 280         if_usb_free(cardp);
 281
 282         usb_set_intfdata(intf, NULL);
 283         usb_put_dev(interface_to_usbdev(intf));
 284
 285         return;
 286 }
 287
 288 /**
 289  *  @brief  This function download FW
 290  *  @param priv         pointer to wlan_private
 291  *  @return             0
 292  */
 293 static int if_prog_firmware(wlan_private * priv)
 294 {
 295         struct usb_card_rec *cardp = priv->wlan_dev.card;
 296         struct FWData *fwdata;
 297         struct fwheader *fwheader;
 298         u8 *firmware = priv->firmware->data;
 299
 300         fwdata = kmalloc(sizeof(struct FWData), GFP_ATOMIC);
 301
 302         if (!fwdata)
 303                 return -1;
 304
 305         fwheader = &fwdata->fwheader;
 306
 307         if (!cardp->CRC_OK) {
 308                 cardp->totalbytes = cardp->fwlastblksent;
 309                 cardp->fwseqnum = cardp->lastseqnum - 1;
 310         }
 311
 312         /*
 313         lbs_deb_usbd(&cardp->udev->dev, "totalbytes = %d\n",
 314                     cardp->totalbytes);
 315         */
 316
 317         memcpy(fwheader, &firmware[cardp->totalbytes],
 318                sizeof(struct fwheader));
 319
 320         cardp->fwlastblksent = cardp->totalbytes;
 321         cardp->totalbytes += sizeof(struct fwheader);
 322
 323         /* lbs_deb_usbd(&cardp->udev->dev,"Copy Data\n"); */
 324         memcpy(fwdata->data, &firmware[cardp->totalbytes],
 325                fwdata->fwheader.datalength);
 326
 327         /*
 328         lbs_deb_usbd(&cardp->udev->dev,
 329                     "Data length = %d\n", fwdata->fwheader.datalength);
 330         */
 331
 332         cardp->fwseqnum = cardp->fwseqnum + 1;
 333
 334         fwdata->seqnum = cardp->fwseqnum;
 335         cardp->lastseqnum = fwdata->seqnum;
 336         cardp->totalbytes += fwdata->fwheader.datalength;
 337
 338         if (fwheader->dnldcmd == FW_HAS_DATA_TO_RECV) {
 339                 /*
 340                 lbs_deb_usbd(&cardp->udev->dev, "There is data to follow\n");
 341                 lbs_deb_usbd(&cardp->udev->dev,
 342                             "seqnum = %d totalbytes = %d\n", cardp->fwseqnum,
 343                             cardp->totalbytes);
 344                 */
 345                 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
 346                 usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
 347
 348         } else if (fwdata->fwheader.dnldcmd == FW_HAS_LAST_BLOCK) {
 349                 /*
 350                 lbs_deb_usbd(&cardp->udev->dev,
 351                             "Host has finished FW downloading\n");
 352                 lbs_deb_usbd(&cardp->udev->dev,
 353                             "Donwloading FW JUMP BLOCK\n");
 354                 */
 355                 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
 356                 usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
 357                 cardp->fwfinalblk = 1;
 358         }
 359
 360         /*
 361         lbs_deb_usbd(&cardp->udev->dev,
 362                     "The firmware download is done size is %d\n",
 363                     cardp->totalbytes);
 364         */
 365
 366         kfree(fwdata);
 367
 368         return 0;
 369 }
 370
 371 static int libertas_do_reset(wlan_private *priv)
 372 {
 373         int ret;
 374         struct usb_card_rec *cardp = priv->wlan_dev.card;
 375
 376         lbs_deb_enter(LBS_DEB_USB);
 377
 378         ret = usb_reset_device(cardp->udev);
 379         if (!ret) {
 380                 msleep(10);
 381                 reset_device(priv);
 382                 msleep(10);
 383         }
 384
 385         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 386
 387         return ret;
 388 }
 389
 390 /**
 391  *  @brief This function transfer the data to the device.
 392  *  @param priv         pointer to wlan_private
 393  *  @param payload      pointer to payload data
 394  *  @param nb           data length
 395  *  @return             0 or -1
 396  */
 397 int usb_tx_block(wlan_private * priv, u8 * payload, u16 nb)
 398 {
 399         /* pointer to card structure */
 400         struct usb_card_rec *cardp = priv->wlan_dev.card;
 401         int ret = -1;
 402
 403         /* check if device is removed */
 404         if (priv->adapter->surpriseremoved) {
 405                 lbs_deb_usbd(&cardp->udev->dev, "Device removed\n");
 406                 goto tx_ret;
 407         }
 408
 409         usb_fill_bulk_urb(cardp->tx_urb, cardp->udev,
 410                           usb_sndbulkpipe(cardp->udev,
 411                                           cardp->bulk_out_endpointAddr),
 412                           payload, nb, if_usb_write_bulk_callback, priv);
 413
 414         cardp->tx_urb->transfer_flags |= URB_ZERO_PACKET;
 415
 416         if ((ret = usb_submit_urb(cardp->tx_urb, GFP_ATOMIC))) {
 417                 /*  transfer failed */
 418                 lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb failed\n");
 419                 ret = -1;
 420         } else {
 421                 /* lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb success\n"); */
 422                 ret = 0;
 423         }
 424
 425 tx_ret:
 426         return ret;
 427 }
 428
 429 static int __if_usb_submit_rx_urb(wlan_private * priv,
 430                                   void (*callbackfn)
 431                                   (struct urb *urb))
 432 {
 433         struct usb_card_rec *cardp = priv->wlan_dev.card;
 434         struct sk_buff *skb;
 435         struct read_cb_info *rinfo = &cardp->rinfo;
 436         int ret = -1;
 437
 438         if (!(skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE))) {
 439                 lbs_pr_err("No free skb\n");
 440                 goto rx_ret;
 441         }
 442
 443         rinfo->skb = skb;
 444
 445         /* Fill the receive configuration URB and initialise the Rx call back */
 446         usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
 447                           usb_rcvbulkpipe(cardp->udev,
 448                                           cardp->bulk_in_endpointAddr),
 449                           (void *) (skb->tail + (size_t) IPFIELD_ALIGN_OFFSET),
 450                           MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn,
 451                           rinfo);
 452
 453         cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;
 454
 455         /* lbs_deb_usbd(&cardp->udev->dev, "Pointer for rx_urb %p\n", cardp->rx_urb); */
 456         if ((ret = usb_submit_urb(cardp->rx_urb, GFP_ATOMIC))) {
 457                 /* handle failure conditions */
 458                 lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB failed\n");
 459                 ret = -1;
 460         } else {
 461                 /* lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB success\n"); */
 462                 ret = 0;
 463         }
 464
 465 rx_ret:
 466         return ret;
 467 }
 468
 469 static inline int if_usb_submit_rx_urb_fwload(wlan_private * priv)
 470 {
 471         return __if_usb_submit_rx_urb(priv, &if_usb_receive_fwload);
 472 }
 473
 474 static inline int if_usb_submit_rx_urb(wlan_private * priv)
 475 {
 476         return __if_usb_submit_rx_urb(priv, &if_usb_receive);
 477 }
 478
 479 static void if_usb_receive_fwload(struct urb *urb)
 480 {
 481         struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
 482         wlan_private *priv = rinfo->priv;
 483         struct sk_buff *skb = rinfo->skb;
 484         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
 485         struct fwsyncheader *syncfwheader;
 486         struct bootcmdrespStr bootcmdresp;
 487
 488         if (urb->status) {
 489                 lbs_deb_usbd(&cardp->udev->dev,
 490                             "URB status is failed during fw load\n");
 491                 kfree_skb(skb);
 492                 return;
 493         }
 494
 495         if (cardp->bootcmdresp == 0) {
 496                 memcpy (&bootcmdresp, skb->data + IPFIELD_ALIGN_OFFSET,
 497                         sizeof(bootcmdresp));
 498                 if (cardp->udev->descriptor.bcdDevice < 0x3106) {
 499                         kfree_skb(skb);
 500                         if_usb_submit_rx_urb_fwload(priv);
 501                         cardp->bootcmdresp = 1;
 502                         lbs_deb_usbd(&cardp->udev->dev,
 503                                     "Received valid boot command response\n");
 504                         return;
 505                 }
 506                 if (bootcmdresp.u32magicnumber != BOOT_CMD_MAGIC_NUMBER) {
 507                         lbs_pr_info(
 508                                 "boot cmd response wrong magic number (0x%x)\n",
 509                                 bootcmdresp.u32magicnumber);
 510                 } else if (bootcmdresp.u8cmd_tag != BOOT_CMD_FW_BY_USB) {
 511                         lbs_pr_info(
 512                                 "boot cmd response cmd_tag error (%d)\n",
 513                                 bootcmdresp.u8cmd_tag);
 514                 } else if (bootcmdresp.u8result != BOOT_CMD_RESP_OK) {
 515                         lbs_pr_info(
 516                                 "boot cmd response result error (%d)\n",
 517                                 bootcmdresp.u8result);
 518                 } else {
 519                         cardp->bootcmdresp = 1;
 520                         lbs_deb_usbd(&cardp->udev->dev,
 521                                     "Received valid boot command response\n");
 522                 }
 523                 kfree_skb(skb);
 524                 if_usb_submit_rx_urb_fwload(priv);
 525                 return;
 526         }
 527
 528         syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
 529         if (!syncfwheader) {
 530                 lbs_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
 531                 kfree_skb(skb);
 532                 return;
 533         }
 534
 535         memcpy(syncfwheader, skb->data + IPFIELD_ALIGN_OFFSET,
 536                         sizeof(struct fwsyncheader));
 537
 538         if (!syncfwheader->cmd) {
 539                 /*
 540                 lbs_deb_usbd(&cardp->udev->dev,
 541                             "FW received Blk with correct CRC\n");
 542                 lbs_deb_usbd(&cardp->udev->dev,
 543                             "FW received Blk seqnum = %d\n",
 544                        syncfwheader->seqnum);
 545                 */
 546                 cardp->CRC_OK = 1;
 547         } else {
 548                 lbs_deb_usbd(&cardp->udev->dev,
 549                             "FW received Blk with CRC error\n");
 550                 cardp->CRC_OK = 0;
 551         }
 552
 553         kfree_skb(skb);
 554
 555         if (cardp->fwfinalblk) {
 556                 cardp->fwdnldover = 1;
 557                 goto exit;
 558         }
 559
 560         if_prog_firmware(priv);
 561
 562         if_usb_submit_rx_urb_fwload(priv);
 563 exit:
 564         kfree(syncfwheader);
 565
 566         return;
 567
 568 }
 569
 570 #define MRVDRV_MIN_PKT_LEN      30
 571
 572 static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
 573                                        struct usb_card_rec *cardp,
 574                                        wlan_private *priv)
 575 {
 576         if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE +
 577             MESSAGE_HEADER_LEN || recvlength < MRVDRV_MIN_PKT_LEN) {
 578                 lbs_deb_usbd(&cardp->udev->dev,
 579                             "Packet length is Invalid\n");
 580                 kfree_skb(skb);
 581                 return;
 582         }
 583
 584         skb_reserve(skb, IPFIELD_ALIGN_OFFSET);
 585         skb_put(skb, recvlength);
 586         skb_pull(skb, MESSAGE_HEADER_LEN);
 587         libertas_process_rxed_packet(priv, skb);
 588         priv->wlan_dev.upld_len = (recvlength - MESSAGE_HEADER_LEN);
 589 }
 590
 591 static inline void process_cmdrequest(int recvlength, u8 *recvbuff,
 592                                       struct sk_buff *skb,
 593                                       struct usb_card_rec *cardp,
 594                                       wlan_private *priv)
 595 {
 596         u8 *cmdbuf;
 597         if (recvlength > MRVDRV_SIZE_OF_CMD_BUFFER) {
 598                 lbs_deb_usbd(&cardp->udev->dev,
 599                             "The receive buffer is too large\n");
 600                 kfree_skb(skb);
 601                 return;
 602         }
 603
 604         if (!in_interrupt())
 605                 BUG();
 606
 607         spin_lock(&priv->adapter->driver_lock);
 608         /* take care of cur_cmd = NULL case by reading the
 609          * data to clear the interrupt */
 610         if (!priv->adapter->cur_cmd) {
 611                 cmdbuf = priv->wlan_dev.upld_buf;
 612                 priv->adapter->hisregcpy &= ~his_cmdupldrdy;
 613         } else
 614                 cmdbuf = priv->adapter->cur_cmd->bufvirtualaddr;
 615
 616         cardp->usb_int_cause |= his_cmdupldrdy;
 617         priv->wlan_dev.upld_len = (recvlength - MESSAGE_HEADER_LEN);
 618         memcpy(cmdbuf, recvbuff + MESSAGE_HEADER_LEN,
 619                priv->wlan_dev.upld_len);
 620
 621         kfree_skb(skb);
 622         libertas_interrupt(priv->wlan_dev.netdev);
 623         spin_unlock(&priv->adapter->driver_lock);
 624
 625         lbs_deb_usbd(&cardp->udev->dev,
 626                     "Wake up main thread to handle cmd response\n");
 627
 628         return;
 629 }
 630
 631 /**
 632  *  @brief This function reads of the packet into the upload buff,
 633  *  wake up the main thread and initialise the Rx callack.
 634  *
 635  *  @param urb          pointer to struct urb
 636  *  @return             N/A
 637  */
 638 static void if_usb_receive(struct urb *urb)
 639 {
 640         struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
 641         wlan_private *priv = rinfo->priv;
 642         struct sk_buff *skb = rinfo->skb;
 643         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
 644
 645         int recvlength = urb->actual_length;
 646         u8 *recvbuff = NULL;
 647         u32 recvtype;
 648
 649         lbs_deb_enter(LBS_DEB_USB);
 650
 651         if (recvlength) {
 652                 if (urb->status) {
 653                         lbs_deb_usbd(&cardp->udev->dev,
 654                                     "URB status is failed\n");
 655                         kfree_skb(skb);
 656                         goto setup_for_next;
 657                 }
 658
 659                 recvbuff = skb->data + IPFIELD_ALIGN_OFFSET;
 660                 memcpy(&recvtype, recvbuff, sizeof(u32));
 661                 lbs_deb_usbd(&cardp->udev->dev,
 662                             "Recv length = 0x%x\n", recvlength);
 663                 lbs_deb_usbd(&cardp->udev->dev,
 664                             "Receive type = 0x%X\n", recvtype);
 665                 recvtype = le32_to_cpu(recvtype);
 666                 lbs_deb_usbd(&cardp->udev->dev,
 667                             "Receive type after = 0x%X\n", recvtype);
 668         } else if (urb->status)
 669                 goto rx_exit;
 670
 671
 672         switch (recvtype) {
 673         case CMD_TYPE_DATA:
 674                 process_cmdtypedata(recvlength, skb, cardp, priv);
 675                 break;
 676
 677         case CMD_TYPE_REQUEST:
 678                 process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
 679                 break;
 680
 681         case CMD_TYPE_INDICATION:
 682                 /* Event cause handling */
 683                 spin_lock(&priv->adapter->driver_lock);
 684                 cardp->usb_event_cause = *(u32 *) (recvbuff + MESSAGE_HEADER_LEN);
 685                 lbs_deb_usbd(&cardp->udev->dev,"**EVENT** 0x%X\n",
 686                             cardp->usb_event_cause);
 687                 if (cardp->usb_event_cause & 0xffff0000) {
 688                         libertas_send_tx_feedback(priv);
 689                         spin_unlock(&priv->adapter->driver_lock);
 690                         break;
 691                 }
 692                 cardp->usb_event_cause = le32_to_cpu(cardp->usb_event_cause) << 3;
 693                 cardp->usb_int_cause |= his_cardevent;
 694                 kfree_skb(skb);
 695                 libertas_interrupt(priv->wlan_dev.netdev);
 696                 spin_unlock(&priv->adapter->driver_lock);
 697                 goto rx_exit;
 698         default:
 699                 kfree_skb(skb);
 700                 break;
 701         }
 702
 703 setup_for_next:
 704         if_usb_submit_rx_urb(priv);
 705 rx_exit:
 706         lbs_deb_leave(LBS_DEB_USB);
 707 }
 708
 709 /**
 710  *  @brief This function downloads data to FW
 711  *  @param priv         pointer to wlan_private structure
 712  *  @param type         type of data
 713  *  @param buf          pointer to data buffer
 714  *  @param len          number of bytes
 715  *  @return             0 or -1
 716  */
 717 static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb)
 718 {
 719         int ret = -1;
 720         u32 tmp;
 721         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
 722
 723         lbs_deb_usbd(&cardp->udev->dev,"*** type = %u\n", type);
 724         lbs_deb_usbd(&cardp->udev->dev,"size after = %d\n", nb);
 725
 726         if (type == MVMS_CMD) {
 727                 tmp = cpu_to_le32(CMD_TYPE_REQUEST);
 728                 priv->wlan_dev.dnld_sent = DNLD_CMD_SENT;
 729                 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
 730                        MESSAGE_HEADER_LEN);
 731
 732         } else {
 733                 tmp = cpu_to_le32(CMD_TYPE_DATA);
 734                 priv->wlan_dev.dnld_sent = DNLD_DATA_SENT;
 735                 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
 736                        MESSAGE_HEADER_LEN);
 737         }
 738
 739         memcpy((cardp->bulk_out_buffer + MESSAGE_HEADER_LEN), payload, nb);
 740
 741         ret =
 742             usb_tx_block(priv, cardp->bulk_out_buffer, nb + MESSAGE_HEADER_LEN);
 743
 744         return ret;
 745 }
 746
 747 /* called with adapter->driver_lock held */
 748 static int if_usb_get_int_status(wlan_private * priv, u8 * ireg)
 749 {
 750         struct usb_card_rec *cardp = priv->wlan_dev.card;
 751
 752         *ireg = cardp->usb_int_cause;
 753         cardp->usb_int_cause = 0;
 754
 755         lbs_deb_usbd(&cardp->udev->dev,"Int cause is 0x%X\n", *ireg);
 756
 757         return 0;
 758 }
 759
 760 static int if_usb_read_event_cause(wlan_private * priv)
 761 {
 762         struct usb_card_rec *cardp = priv->wlan_dev.card;
 763         priv->adapter->eventcause = cardp->usb_event_cause;
 764         /* Re-submit rx urb here to avoid event lost issue */
 765         if_usb_submit_rx_urb(priv);
 766         return 0;
 767 }
 768
 769 static int reset_device(wlan_private *priv)
 770 {
 771         int ret;
 772
 773         lbs_deb_enter(LBS_DEB_USB);
 774         ret = libertas_prepare_and_send_command(priv, cmd_802_11_reset,
 775                                     cmd_act_halt, 0, 0, NULL);
 776         msleep_interruptible(10);
 777
 778         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 779         return ret;
 780 }
 781
 782 static int if_usb_unregister_dev(wlan_private * priv)
 783 {
 784         int ret = 0;
 785
 786         /* Need to send a Reset command to device before USB resources freed
 787          * and wlan_remove_card() called, then device can handle FW download
 788          * again.
 789          */
 790         if (priv)
 791                 reset_device(priv);
 792
 793         return ret;
 794 }
 795
 796
 797 /**
 798  *  @brief  This function register usb device and initialize parameter
 799  *  @param              priv pointer to wlan_private
 800  *  @return             0 or -1
 801  */
 802 static int if_usb_register_dev(wlan_private * priv)
 803 {
 804         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
 805
 806         lbs_deb_enter(LBS_DEB_USB);
 807
 808         cardp->priv = priv;
 809         cardp->eth_dev = priv->wlan_dev.netdev;
 810         priv->hotplug_device = &(cardp->udev->dev);
 811
 812         SET_NETDEV_DEV(cardp->eth_dev, &(cardp->udev->dev));
 813         SET_NETDEV_DEV(priv->mesh_dev, &(cardp->udev->dev));
 814
 815         lbs_deb_usbd(&cardp->udev->dev, "udev pointer is at %p\n",
 816                     cardp->udev);
 817
 818         lbs_deb_leave(LBS_DEB_USB);
 819         return 0;
 820 }
 821
 822
 823
 824 static int if_usb_prog_firmware(wlan_private * priv)
 825 {
 826         struct usb_card_rec *cardp = priv->wlan_dev.card;
 827         int i = 0;
 828         static int reset_count = 10;
 829         int ret = 0;
 830
 831         lbs_deb_enter(LBS_DEB_USB);
 832
 833         cardp->rinfo.priv = priv;
 834
 835 restart:
 836         if (if_usb_submit_rx_urb_fwload(priv) < 0) {
 837                 lbs_deb_usbd(&cardp->udev->dev, "URB submission is failed\n");
 838                 ret = -1;
 839                 goto done;
 840         }
 841
 842         cardp->bootcmdresp = 0;
 843         do {
 844                 int j = 0;
 845                 i++;
 846                 /* Issue Boot command = 1, Boot from Download-FW */
 847                 if_usb_issue_boot_command(priv, BOOT_CMD_FW_BY_USB);
 848                 /* wait for command response */
 849                 do {
 850                         j++;
 851                         msleep_interruptible(100);
 852                 } while (cardp->bootcmdresp == 0 && j < 10);
 853         } while (cardp->bootcmdresp == 0 && i < 5);
 854
 855         if (cardp->bootcmdresp == 0) {
 856                 if (--reset_count >= 0) {
 857                         libertas_do_reset(priv);
 858                         goto restart;
 859                 }
 860                 return -1;
 861         }
 862
 863         i = 0;
 864         priv->adapter->fw_ready = 0;
 865
 866         cardp->totalbytes = 0;
 867         cardp->fwlastblksent = 0;
 868         cardp->CRC_OK = 1;
 869         cardp->fwdnldover = 0;
 870         cardp->fwseqnum = -1;
 871         cardp->totalbytes = 0;
 872         cardp->fwfinalblk = 0;
 873
 874         if_prog_firmware(priv);
 875
 876         do {
 877                 lbs_deb_usbd(&cardp->udev->dev,"Wlan sched timeout\n");
 878                 i++;
 879                 msleep_interruptible(100);
 880                 if (priv->adapter->surpriseremoved || i >= 20)
 881                         break;
 882         } while (!cardp->fwdnldover);
 883
 884         if (!cardp->fwdnldover) {
 885                 lbs_pr_info("failed to load fw, resetting device!\n");
 886                 if (--reset_count >= 0) {
 887                         libertas_do_reset(priv);
 888                         goto restart;
 889                 }
 890
 891                 lbs_pr_info("FW download failure, time = %d ms\n", i * 100);
 892                 ret = -1;
 893                 goto done;
 894         }
 895
 896         if_usb_submit_rx_urb(priv);
 897
 898         /* Delay 200 ms to waiting for the FW ready */
 899         msleep_interruptible(200);
 900
 901         priv->adapter->fw_ready = 1;
 902
 903 done:
 904         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 905         return ret;
 906 }
 907
 908 #ifdef CONFIG_PM
 909 static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)
 910 {
 911         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 912         wlan_private *priv = cardp->priv;
 913
 914         lbs_deb_enter(LBS_DEB_USB);
 915
 916         if (priv->adapter->psstate != PS_STATE_FULL_POWER)
 917                 return -1;
 918
 919         netif_device_detach(cardp->eth_dev);
 920         netif_device_detach(priv->mesh_dev);
 921
 922         /* Unlink tx & rx urb */
 923         usb_kill_urb(cardp->tx_urb);
 924         usb_kill_urb(cardp->rx_urb);
 925
 926         cardp->rx_urb_recall = 1;
 927
 928         lbs_deb_leave(LBS_DEB_USB);
 929         return 0;
 930 }
 931
 932 static int if_usb_resume(struct usb_interface *intf)
 933 {
 934         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 935         wlan_private *priv = cardp->priv;
 936
 937         lbs_deb_enter(LBS_DEB_USB);
 938
 939         cardp->rx_urb_recall = 0;
 940
 941         if_usb_submit_rx_urb(cardp->priv);
 942
 943         netif_device_attach(cardp->eth_dev);
 944         netif_device_attach(priv->mesh_dev);
 945
 946         lbs_deb_leave(LBS_DEB_USB);
 947         return 0;
 948 }
 949 #else
 950 #define if_usb_suspend NULL
 951 #define if_usb_resume NULL
 952 #endif
 953
 954 static struct usb_driver if_usb_driver = {
 955         /* driver name */
 956         .name = usbdriver_name,
 957         /* probe function name */
 958         .probe = if_usb_probe,
 959         /* disconnect function  name */
 960         .disconnect = if_usb_disconnect,
 961         /* device signature table */
 962         .id_table = if_usb_table,
 963         .suspend = if_usb_suspend,
 964         .resume = if_usb_resume,
 965 };
 966
 967 /**
 968  *  @brief This function registers driver.
 969  *  @param add          pointer to add_card callback function
 970  *  @param remove       pointer to remove card callback function
 971  *  @param arg          pointer to call back function parameter
 972  *  @return             dummy success variable
 973  */
 974 int if_usb_register(void)
 975 {
 976         /*
 977          * API registers the Marvell USB driver
 978          * to the USB system
 979          */
 980         usb_register(&if_usb_driver);
 981
 982         /* Return success to wlan layer */
 983         return 0;
 984 }
 985
 986 /**
 987  *  @brief This function removes usb driver.
 988  *  @return             N/A
 989  */
 990 void if_usb_unregister(void)
 991 {
 992         int i;
 993
 994         for (i = 0; i<libertas_found; i++) {
 995                 wlan_private *priv = libertas_devs[i]->priv;
 996                 reset_device(priv);
 997         }
 998
 999         /* API unregisters the driver from USB subsystem */
1000         usb_deregister(&if_usb_driver);
1001 }