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 #include "host.h"
  12 #include "decl.h"
  13 #include "defs.h"
  14 #include "dev.h"
  15 #include "if_usb.h"
  16
  17 #define MESSAGE_HEADER_LEN      4
  18
  19 static const char usbdriver_name[] = "usb8xxx";
  20 static u8 *default_fw_name = "usb8388.bin";
  21
  22 char *libertas_fw_name = NULL;
  23 module_param_named(fw_name, libertas_fw_name, charp, 0644);
  24
  25 /*
  26  * We need to send a RESET command to all USB devices before
  27  * we tear down the USB connection. Otherwise we would not
  28  * be able to re-init device the device if the module gets
  29  * loaded again. This is a list of all initialized USB devices,
  30  * for the reset code see if_usb_reset_device()
  31 */
  32 static LIST_HEAD(usb_devices);
  33
  34 static struct usb_device_id if_usb_table[] = {
  35         /* Enter the device signature inside */
  36         { USB_DEVICE(0x1286, 0x2001) },
  37         { USB_DEVICE(0x05a3, 0x8388) },
  38         {}      /* Terminating entry */
  39 };
  40
  41 MODULE_DEVICE_TABLE(usb, if_usb_table);
  42
  43 static void if_usb_receive(struct urb *urb);
  44 static void if_usb_receive_fwload(struct urb *urb);
  45 static int if_usb_reset_device(wlan_private *priv);
  46 static int if_usb_register_dev(wlan_private * priv);
  47 static int if_usb_unregister_dev(wlan_private *);
  48 static int if_usb_prog_firmware(wlan_private *);
  49 static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb);
  50 static int if_usb_get_int_status(wlan_private * priv, u8 *);
  51 static int if_usb_read_event_cause(wlan_private *);
  52
  53 /**
  54  *  @brief  call back function to handle the status of the URB
  55  *  @param urb          pointer to urb structure
  56  *  @return             N/A
  57  */
  58 static void if_usb_write_bulk_callback(struct urb *urb)
  59 {
  60         wlan_private *priv = (wlan_private *) (urb->context);
  61         wlan_adapter *adapter = priv->adapter;
  62         struct net_device *dev = priv->wlan_dev.netdev;
  63
  64         /* handle the transmission complete validations */
  65
  66         if (urb->status != 0) {
  67                 /* print the failure status number for debug */
  68                 lbs_pr_info("URB in failure status\n");
  69         } else {
  70                 /*
  71                 lbs_deb_usbd(&urb->dev->dev, "URB status is successfull\n");
  72                 lbs_deb_usbd(&urb->dev->dev, "Actual length transmitted %d\n",
  73                        urb->actual_length);
  74                 */
  75                 priv->wlan_dev.dnld_sent = DNLD_RES_RECEIVED;
  76                 /* Wake main thread if commands are pending */
  77                 if (!adapter->cur_cmd)
  78                         wake_up_interruptible(&priv->mainthread.waitq);
  79                 if ((adapter->connect_status == libertas_connected)) {
  80                         netif_wake_queue(dev);
  81                         netif_wake_queue(priv->mesh_dev);
  82                 }
  83         }
  84
  85         return;
  86 }
  87
  88 /**
  89  *  @brief  free tx/rx urb, skb and rx buffer
  90  *  @param cardp        pointer usb_card_rec
  91  *  @return             N/A
  92  */
  93 void if_usb_free(struct usb_card_rec *cardp)
  94 {
  95         lbs_deb_enter(LBS_DEB_USB);
  96
  97         /* Unlink tx & rx urb */
  98         usb_kill_urb(cardp->tx_urb);
  99         usb_kill_urb(cardp->rx_urb);
 100
 101         usb_free_urb(cardp->tx_urb);
 102         cardp->tx_urb = NULL;
 103
 104         usb_free_urb(cardp->rx_urb);
 105         cardp->rx_urb = NULL;
 106
 107         kfree(cardp->bulk_out_buffer);
 108         cardp->bulk_out_buffer = NULL;
 109
 110         lbs_deb_leave(LBS_DEB_USB);
 111 }
 112
 113 /**
 114  *  @brief sets the configuration values
 115  *  @param ifnum        interface number
 116  *  @param id           pointer to usb_device_id
 117  *  @return             0 on success, error code on failure
 118  */
 119 static int if_usb_probe(struct usb_interface *intf,
 120                         const struct usb_device_id *id)
 121 {
 122         struct usb_device *udev;
 123         struct usb_host_interface *iface_desc;
 124         struct usb_endpoint_descriptor *endpoint;
 125         wlan_private *priv;
 126         struct usb_card_rec *cardp;
 127         int i;
 128
 129         udev = interface_to_usbdev(intf);
 130
 131         cardp = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
 132         if (!cardp) {
 133                 lbs_pr_err("Out of memory allocating private data.\n");
 134                 goto error;
 135         }
 136
 137         cardp->udev = udev;
 138         iface_desc = intf->cur_altsetting;
 139
 140         lbs_deb_usbd(&udev->dev, "bcdUSB = 0x%X bDeviceClass = 0x%X"
 141                " bDeviceSubClass = 0x%X, bDeviceProtocol = 0x%X\n",
 142                udev->descriptor.bcdUSB,
 143                udev->descriptor.bDeviceClass,
 144                udev->descriptor.bDeviceSubClass,
 145                udev->descriptor.bDeviceProtocol);
 146
 147         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 148                 endpoint = &iface_desc->endpoint[i].desc;
 149                 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
 150                     && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 151                         USB_ENDPOINT_XFER_BULK)) {
 152                         /* we found a bulk in endpoint */
 153                         lbs_deb_usbd(&udev->dev, "Bulk in size is %d\n",
 154                                endpoint->wMaxPacketSize);
 155                         if (!
 156                             (cardp->rx_urb =
 157                              usb_alloc_urb(0, GFP_KERNEL))) {
 158                                 lbs_deb_usbd(&udev->dev,
 159                                        "Rx URB allocation failed\n");
 160                                 goto dealloc;
 161                         }
 162                         cardp->rx_urb_recall = 0;
 163
 164                         cardp->bulk_in_size =
 165                             endpoint->wMaxPacketSize;
 166                         cardp->bulk_in_endpointAddr =
 167                             (endpoint->
 168                              bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 169                         lbs_deb_usbd(&udev->dev, "in_endpoint = %d\n",
 170                                endpoint->bEndpointAddress);
 171                 }
 172
 173                 if (((endpoint->
 174                       bEndpointAddress & USB_ENDPOINT_DIR_MASK) ==
 175                      USB_DIR_OUT)
 176                     && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 177                         USB_ENDPOINT_XFER_BULK)) {
 178                         /* We found bulk out endpoint */
 179                         if (!
 180                             (cardp->tx_urb =
 181                              usb_alloc_urb(0, GFP_KERNEL))) {
 182                                 lbs_deb_usbd(&udev->dev,
 183                                        "Tx URB allocation failed\n");
 184                                 goto dealloc;
 185                         }
 186
 187                         cardp->bulk_out_size =
 188                             endpoint->wMaxPacketSize;
 189                         lbs_deb_usbd(&udev->dev,
 190                                     "Bulk out size is %d\n",
 191                                     endpoint->wMaxPacketSize);
 192                         cardp->bulk_out_endpointAddr =
 193                             endpoint->bEndpointAddress;
 194                         lbs_deb_usbd(&udev->dev, "out_endpoint = %d\n",
 195                                     endpoint->bEndpointAddress);
 196                         cardp->bulk_out_buffer =
 197                             kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE,
 198                                     GFP_KERNEL);
 199
 200                         if (!cardp->bulk_out_buffer) {
 201                                 lbs_deb_usbd(&udev->dev,
 202                                        "Could not allocate buffer\n");
 203                                 goto dealloc;
 204                         }
 205                 }
 206         }
 207
 208
 209         /* At this point libertas_add_card() will be called.  Don't worry
 210          * about keeping pwlanpriv around since it will be set on our
 211          * usb device data in -> add() -> hw_register_dev() -> if_usb_register_dev.
 212          */
 213         if (!(priv = libertas_add_card(cardp)))
 214                 goto dealloc;
 215
 216         if (libertas_add_mesh(priv))
 217                 goto err_add_mesh;
 218
 219         priv->hw_register_dev = if_usb_register_dev;
 220         priv->hw_unregister_dev = if_usb_unregister_dev;
 221         priv->hw_prog_firmware = if_usb_prog_firmware;
 222         priv->hw_host_to_card = if_usb_host_to_card;
 223         priv->hw_get_int_status = if_usb_get_int_status;
 224         priv->hw_read_event_cause = if_usb_read_event_cause;
 225
 226         if (libertas_activate_card(priv, libertas_fw_name))
 227                 goto err_activate_card;
 228
 229         list_add_tail(&cardp->list, &usb_devices);
 230
 231         usb_get_dev(udev);
 232         usb_set_intfdata(intf, cardp);
 233
 234         return 0;
 235
 236 err_activate_card:
 237         unregister_netdev(priv->mesh_dev);
 238         free_netdev(priv->mesh_dev);
 239 err_add_mesh:
 240         free_netdev(priv->wlan_dev.netdev);
 241         kfree(priv->adapter);
 242 dealloc:
 243         if_usb_free(cardp);
 244
 245 error:
 246         return -ENOMEM;
 247 }
 248
 249 /**
 250  *  @brief free resource and cleanup
 251  *  @param intf         USB interface structure
 252  *  @return             N/A
 253  */
 254 static void if_usb_disconnect(struct usb_interface *intf)
 255 {
 256         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 257         wlan_private *priv = (wlan_private *) cardp->priv;
 258         wlan_adapter *adapter = NULL;
 259
 260         adapter = priv->adapter;
 261
 262         /*
 263          * Update Surprise removed to TRUE
 264          */
 265         adapter->surpriseremoved = 1;
 266
 267         list_del(&cardp->list);
 268
 269         /* card is removed and we can call wlan_remove_card */
 270         lbs_deb_usbd(&cardp->udev->dev, "call remove card\n");
 271         libertas_remove_mesh(priv);
 272         libertas_remove_card(priv);
 273
 274         /* Unlink and free urb */
 275         if_usb_free(cardp);
 276
 277         usb_set_intfdata(intf, NULL);
 278         usb_put_dev(interface_to_usbdev(intf));
 279
 280         return;
 281 }
 282
 283 /**
 284  *  @brief  This function download FW
 285  *  @param priv         pointer to wlan_private
 286  *  @return             0
 287  */
 288 static int if_prog_firmware(wlan_private * priv)
 289 {
 290         struct usb_card_rec *cardp = priv->wlan_dev.card;
 291         struct FWData *fwdata;
 292         struct fwheader *fwheader;
 293         u8 *firmware = priv->firmware->data;
 294
 295         fwdata = kmalloc(sizeof(struct FWData), GFP_ATOMIC);
 296
 297         if (!fwdata)
 298                 return -1;
 299
 300         fwheader = &fwdata->fwheader;
 301
 302         if (!cardp->CRC_OK) {
 303                 cardp->totalbytes = cardp->fwlastblksent;
 304                 cardp->fwseqnum = cardp->lastseqnum - 1;
 305         }
 306
 307         /*
 308         lbs_deb_usbd(&cardp->udev->dev, "totalbytes = %d\n",
 309                     cardp->totalbytes);
 310         */
 311
 312         memcpy(fwheader, &firmware[cardp->totalbytes],
 313                sizeof(struct fwheader));
 314
 315         cardp->fwlastblksent = cardp->totalbytes;
 316         cardp->totalbytes += sizeof(struct fwheader);
 317
 318         /* lbs_deb_usbd(&cardp->udev->dev,"Copy Data\n"); */
 319         memcpy(fwdata->data, &firmware[cardp->totalbytes],
 320                fwdata->fwheader.datalength);
 321
 322         /*
 323         lbs_deb_usbd(&cardp->udev->dev,
 324                     "Data length = %d\n", fwdata->fwheader.datalength);
 325         */
 326
 327         cardp->fwseqnum = cardp->fwseqnum + 1;
 328
 329         fwdata->seqnum = cardp->fwseqnum;
 330         cardp->lastseqnum = fwdata->seqnum;
 331         cardp->totalbytes += fwdata->fwheader.datalength;
 332
 333         if (fwheader->dnldcmd == FW_HAS_DATA_TO_RECV) {
 334                 /*
 335                 lbs_deb_usbd(&cardp->udev->dev, "There is data to follow\n");
 336                 lbs_deb_usbd(&cardp->udev->dev,
 337                             "seqnum = %d totalbytes = %d\n", cardp->fwseqnum,
 338                             cardp->totalbytes);
 339                 */
 340                 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
 341                 usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
 342
 343         } else if (fwdata->fwheader.dnldcmd == FW_HAS_LAST_BLOCK) {
 344                 /*
 345                 lbs_deb_usbd(&cardp->udev->dev,
 346                             "Host has finished FW downloading\n");
 347                 lbs_deb_usbd(&cardp->udev->dev,
 348                             "Donwloading FW JUMP BLOCK\n");
 349                 */
 350                 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
 351                 usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
 352                 cardp->fwfinalblk = 1;
 353         }
 354
 355         /*
 356         lbs_deb_usbd(&cardp->udev->dev,
 357                     "The firmware download is done size is %d\n",
 358                     cardp->totalbytes);
 359         */
 360
 361         kfree(fwdata);
 362
 363         return 0;
 364 }
 365
 366 static int libertas_do_reset(wlan_private *priv)
 367 {
 368         int ret;
 369         struct usb_card_rec *cardp = priv->wlan_dev.card;
 370
 371         lbs_deb_enter(LBS_DEB_USB);
 372
 373         ret = usb_reset_device(cardp->udev);
 374         if (!ret) {
 375                 msleep(10);
 376                 if_usb_reset_device(priv);
 377                 msleep(10);
 378         }
 379
 380         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 381
 382         return ret;
 383 }
 384
 385 /**
 386  *  @brief This function transfer the data to the device.
 387  *  @param priv         pointer to wlan_private
 388  *  @param payload      pointer to payload data
 389  *  @param nb           data length
 390  *  @return             0 or -1
 391  */
 392 int usb_tx_block(wlan_private * priv, u8 * payload, u16 nb)
 393 {
 394         /* pointer to card structure */
 395         struct usb_card_rec *cardp = priv->wlan_dev.card;
 396         int ret = -1;
 397
 398         /* check if device is removed */
 399         if (priv->adapter->surpriseremoved) {
 400                 lbs_deb_usbd(&cardp->udev->dev, "Device removed\n");
 401                 goto tx_ret;
 402         }
 403
 404         usb_fill_bulk_urb(cardp->tx_urb, cardp->udev,
 405                           usb_sndbulkpipe(cardp->udev,
 406                                           cardp->bulk_out_endpointAddr),
 407                           payload, nb, if_usb_write_bulk_callback, priv);
 408
 409         cardp->tx_urb->transfer_flags |= URB_ZERO_PACKET;
 410
 411         if ((ret = usb_submit_urb(cardp->tx_urb, GFP_ATOMIC))) {
 412                 /*  transfer failed */
 413                 lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb failed\n");
 414                 ret = -1;
 415         } else {
 416                 /* lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb success\n"); */
 417                 ret = 0;
 418         }
 419
 420 tx_ret:
 421         return ret;
 422 }
 423
 424 static int __if_usb_submit_rx_urb(wlan_private * priv,
 425                                   void (*callbackfn)
 426                                   (struct urb *urb))
 427 {
 428         struct usb_card_rec *cardp = priv->wlan_dev.card;
 429         struct sk_buff *skb;
 430         struct read_cb_info *rinfo = &cardp->rinfo;
 431         int ret = -1;
 432
 433         if (!(skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE))) {
 434                 lbs_pr_err("No free skb\n");
 435                 goto rx_ret;
 436         }
 437
 438         rinfo->skb = skb;
 439
 440         /* Fill the receive configuration URB and initialise the Rx call back */
 441         usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
 442                           usb_rcvbulkpipe(cardp->udev,
 443                                           cardp->bulk_in_endpointAddr),
 444                           (void *) (skb->tail + (size_t) IPFIELD_ALIGN_OFFSET),
 445                           MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn,
 446                           rinfo);
 447
 448         cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;
 449
 450         /* lbs_deb_usbd(&cardp->udev->dev, "Pointer for rx_urb %p\n", cardp->rx_urb); */
 451         if ((ret = usb_submit_urb(cardp->rx_urb, GFP_ATOMIC))) {
 452                 /* handle failure conditions */
 453                 lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB failed\n");
 454                 ret = -1;
 455         } else {
 456                 /* lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB success\n"); */
 457                 ret = 0;
 458         }
 459
 460 rx_ret:
 461         return ret;
 462 }
 463
 464 static inline int if_usb_submit_rx_urb_fwload(wlan_private * priv)
 465 {
 466         return __if_usb_submit_rx_urb(priv, &if_usb_receive_fwload);
 467 }
 468
 469 static inline int if_usb_submit_rx_urb(wlan_private * priv)
 470 {
 471         return __if_usb_submit_rx_urb(priv, &if_usb_receive);
 472 }
 473
 474 static void if_usb_receive_fwload(struct urb *urb)
 475 {
 476         struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
 477         wlan_private *priv = rinfo->priv;
 478         struct sk_buff *skb = rinfo->skb;
 479         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
 480         struct fwsyncheader *syncfwheader;
 481         struct bootcmdrespStr bootcmdresp;
 482
 483         if (urb->status) {
 484                 lbs_deb_usbd(&cardp->udev->dev,
 485                             "URB status is failed during fw load\n");
 486                 kfree_skb(skb);
 487                 return;
 488         }
 489
 490         if (cardp->bootcmdresp == 0) {
 491                 memcpy (&bootcmdresp, skb->data + IPFIELD_ALIGN_OFFSET,
 492                         sizeof(bootcmdresp));
 493                 if (cardp->udev->descriptor.bcdDevice < 0x3106) {
 494                         kfree_skb(skb);
 495                         if_usb_submit_rx_urb_fwload(priv);
 496                         cardp->bootcmdresp = 1;
 497                         lbs_deb_usbd(&cardp->udev->dev,
 498                                     "Received valid boot command response\n");
 499                         return;
 500                 }
 501                 if (bootcmdresp.u32magicnumber != BOOT_CMD_MAGIC_NUMBER) {
 502                         lbs_pr_info(
 503                                 "boot cmd response wrong magic number (0x%x)\n",
 504                                 bootcmdresp.u32magicnumber);
 505                 } else if (bootcmdresp.u8cmd_tag != BOOT_CMD_FW_BY_USB) {
 506                         lbs_pr_info(
 507                                 "boot cmd response cmd_tag error (%d)\n",
 508                                 bootcmdresp.u8cmd_tag);
 509                 } else if (bootcmdresp.u8result != BOOT_CMD_RESP_OK) {
 510                         lbs_pr_info(
 511                                 "boot cmd response result error (%d)\n",
 512                                 bootcmdresp.u8result);
 513                 } else {
 514                         cardp->bootcmdresp = 1;
 515                         lbs_deb_usbd(&cardp->udev->dev,
 516                                     "Received valid boot command response\n");
 517                 }
 518                 kfree_skb(skb);
 519                 if_usb_submit_rx_urb_fwload(priv);
 520                 return;
 521         }
 522
 523         syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
 524         if (!syncfwheader) {
 525                 lbs_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
 526                 kfree_skb(skb);
 527                 return;
 528         }
 529
 530         memcpy(syncfwheader, skb->data + IPFIELD_ALIGN_OFFSET,
 531                         sizeof(struct fwsyncheader));
 532
 533         if (!syncfwheader->cmd) {
 534                 /*
 535                 lbs_deb_usbd(&cardp->udev->dev,
 536                             "FW received Blk with correct CRC\n");
 537                 lbs_deb_usbd(&cardp->udev->dev,
 538                             "FW received Blk seqnum = %d\n",
 539                        syncfwheader->seqnum);
 540                 */
 541                 cardp->CRC_OK = 1;
 542         } else {
 543                 lbs_deb_usbd(&cardp->udev->dev,
 544                             "FW received Blk with CRC error\n");
 545                 cardp->CRC_OK = 0;
 546         }
 547
 548         kfree_skb(skb);
 549
 550         if (cardp->fwfinalblk) {
 551                 cardp->fwdnldover = 1;
 552                 goto exit;
 553         }
 554
 555         if_prog_firmware(priv);
 556
 557         if_usb_submit_rx_urb_fwload(priv);
 558 exit:
 559         kfree(syncfwheader);
 560
 561         return;
 562
 563 }
 564
 565 #define MRVDRV_MIN_PKT_LEN      30
 566
 567 static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
 568                                        struct usb_card_rec *cardp,
 569                                        wlan_private *priv)
 570 {
 571         if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE +
 572             MESSAGE_HEADER_LEN || recvlength < MRVDRV_MIN_PKT_LEN) {
 573                 lbs_deb_usbd(&cardp->udev->dev,
 574                             "Packet length is Invalid\n");
 575                 kfree_skb(skb);
 576                 return;
 577         }
 578
 579         skb_reserve(skb, IPFIELD_ALIGN_OFFSET);
 580         skb_put(skb, recvlength);
 581         skb_pull(skb, MESSAGE_HEADER_LEN);
 582         libertas_process_rxed_packet(priv, skb);
 583         priv->wlan_dev.upld_len = (recvlength - MESSAGE_HEADER_LEN);
 584 }
 585
 586 static inline void process_cmdrequest(int recvlength, u8 *recvbuff,
 587                                       struct sk_buff *skb,
 588                                       struct usb_card_rec *cardp,
 589                                       wlan_private *priv)
 590 {
 591         u8 *cmdbuf;
 592         if (recvlength > MRVDRV_SIZE_OF_CMD_BUFFER) {
 593                 lbs_deb_usbd(&cardp->udev->dev,
 594                             "The receive buffer is too large\n");
 595                 kfree_skb(skb);
 596                 return;
 597         }
 598
 599         if (!in_interrupt())
 600                 BUG();
 601
 602         spin_lock(&priv->adapter->driver_lock);
 603         /* take care of cur_cmd = NULL case by reading the
 604          * data to clear the interrupt */
 605         if (!priv->adapter->cur_cmd) {
 606                 cmdbuf = priv->wlan_dev.upld_buf;
 607                 priv->adapter->hisregcpy &= ~his_cmdupldrdy;
 608         } else
 609                 cmdbuf = priv->adapter->cur_cmd->bufvirtualaddr;
 610
 611         cardp->usb_int_cause |= his_cmdupldrdy;
 612         priv->wlan_dev.upld_len = (recvlength - MESSAGE_HEADER_LEN);
 613         memcpy(cmdbuf, recvbuff + MESSAGE_HEADER_LEN,
 614                priv->wlan_dev.upld_len);
 615
 616         kfree_skb(skb);
 617         libertas_interrupt(priv->wlan_dev.netdev);
 618         spin_unlock(&priv->adapter->driver_lock);
 619
 620         lbs_deb_usbd(&cardp->udev->dev,
 621                     "Wake up main thread to handle cmd response\n");
 622
 623         return;
 624 }
 625
 626 /**
 627  *  @brief This function reads of the packet into the upload buff,
 628  *  wake up the main thread and initialise the Rx callack.
 629  *
 630  *  @param urb          pointer to struct urb
 631  *  @return             N/A
 632  */
 633 static void if_usb_receive(struct urb *urb)
 634 {
 635         struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
 636         wlan_private *priv = rinfo->priv;
 637         struct sk_buff *skb = rinfo->skb;
 638         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
 639
 640         int recvlength = urb->actual_length;
 641         u8 *recvbuff = NULL;
 642         u32 recvtype;
 643
 644         lbs_deb_enter(LBS_DEB_USB);
 645
 646         if (recvlength) {
 647                 if (urb->status) {
 648                         lbs_deb_usbd(&cardp->udev->dev,
 649                                     "URB status is failed\n");
 650                         kfree_skb(skb);
 651                         goto setup_for_next;
 652                 }
 653
 654                 recvbuff = skb->data + IPFIELD_ALIGN_OFFSET;
 655                 memcpy(&recvtype, recvbuff, sizeof(u32));
 656                 lbs_deb_usbd(&cardp->udev->dev,
 657                             "Recv length = 0x%x\n", recvlength);
 658                 lbs_deb_usbd(&cardp->udev->dev,
 659                             "Receive type = 0x%X\n", recvtype);
 660                 recvtype = le32_to_cpu(recvtype);
 661                 lbs_deb_usbd(&cardp->udev->dev,
 662                             "Receive type after = 0x%X\n", recvtype);
 663         } else if (urb->status)
 664                 goto rx_exit;
 665
 666
 667         switch (recvtype) {
 668         case CMD_TYPE_DATA:
 669                 process_cmdtypedata(recvlength, skb, cardp, priv);
 670                 break;
 671
 672         case CMD_TYPE_REQUEST:
 673                 process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
 674                 break;
 675
 676         case CMD_TYPE_INDICATION:
 677                 /* Event cause handling */
 678                 spin_lock(&priv->adapter->driver_lock);
 679                 cardp->usb_event_cause = *(u32 *) (recvbuff + MESSAGE_HEADER_LEN);
 680                 lbs_deb_usbd(&cardp->udev->dev,"**EVENT** 0x%X\n",
 681                             cardp->usb_event_cause);
 682                 if (cardp->usb_event_cause & 0xffff0000) {
 683                         libertas_send_tx_feedback(priv);
 684                         spin_unlock(&priv->adapter->driver_lock);
 685                         break;
 686                 }
 687                 cardp->usb_event_cause = le32_to_cpu(cardp->usb_event_cause) << 3;
 688                 cardp->usb_int_cause |= his_cardevent;
 689                 kfree_skb(skb);
 690                 libertas_interrupt(priv->wlan_dev.netdev);
 691                 spin_unlock(&priv->adapter->driver_lock);
 692                 goto rx_exit;
 693         default:
 694                 kfree_skb(skb);
 695                 break;
 696         }
 697
 698 setup_for_next:
 699         if_usb_submit_rx_urb(priv);
 700 rx_exit:
 701         lbs_deb_leave(LBS_DEB_USB);
 702 }
 703
 704 /**
 705  *  @brief This function downloads data to FW
 706  *  @param priv         pointer to wlan_private structure
 707  *  @param type         type of data
 708  *  @param buf          pointer to data buffer
 709  *  @param len          number of bytes
 710  *  @return             0 or -1
 711  */
 712 static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb)
 713 {
 714         int ret = -1;
 715         u32 tmp;
 716         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
 717
 718         lbs_deb_usbd(&cardp->udev->dev,"*** type = %u\n", type);
 719         lbs_deb_usbd(&cardp->udev->dev,"size after = %d\n", nb);
 720
 721         if (type == MVMS_CMD) {
 722                 tmp = cpu_to_le32(CMD_TYPE_REQUEST);
 723                 priv->wlan_dev.dnld_sent = DNLD_CMD_SENT;
 724                 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
 725                        MESSAGE_HEADER_LEN);
 726
 727         } else {
 728                 tmp = cpu_to_le32(CMD_TYPE_DATA);
 729                 priv->wlan_dev.dnld_sent = DNLD_DATA_SENT;
 730                 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
 731                        MESSAGE_HEADER_LEN);
 732         }
 733
 734         memcpy((cardp->bulk_out_buffer + MESSAGE_HEADER_LEN), payload, nb);
 735
 736         ret =
 737             usb_tx_block(priv, cardp->bulk_out_buffer, nb + MESSAGE_HEADER_LEN);
 738
 739         return ret;
 740 }
 741
 742 /* called with adapter->driver_lock held */
 743 static int if_usb_get_int_status(wlan_private * priv, u8 * ireg)
 744 {
 745         struct usb_card_rec *cardp = priv->wlan_dev.card;
 746
 747         *ireg = cardp->usb_int_cause;
 748         cardp->usb_int_cause = 0;
 749
 750         lbs_deb_usbd(&cardp->udev->dev,"Int cause is 0x%X\n", *ireg);
 751
 752         return 0;
 753 }
 754
 755 static int if_usb_read_event_cause(wlan_private * priv)
 756 {
 757         struct usb_card_rec *cardp = priv->wlan_dev.card;
 758         priv->adapter->eventcause = cardp->usb_event_cause;
 759         /* Re-submit rx urb here to avoid event lost issue */
 760         if_usb_submit_rx_urb(priv);
 761         return 0;
 762 }
 763
 764 static int if_usb_reset_device(wlan_private *priv)
 765 {
 766         int ret;
 767
 768         lbs_deb_enter(LBS_DEB_USB);
 769         ret = libertas_prepare_and_send_command(priv, cmd_802_11_reset,
 770                                     cmd_act_halt, 0, 0, NULL);
 771         msleep_interruptible(10);
 772
 773         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 774         return ret;
 775 }
 776
 777 static int if_usb_unregister_dev(wlan_private * priv)
 778 {
 779         int ret = 0;
 780
 781         /* Need to send a Reset command to device before USB resources freed
 782          * and wlan_remove_card() called, then device can handle FW download
 783          * again.
 784          */
 785         if (priv)
 786                 if_usb_reset_device(priv);
 787
 788         return ret;
 789 }
 790
 791
 792 /**
 793  *  @brief  This function register usb device and initialize parameter
 794  *  @param              priv pointer to wlan_private
 795  *  @return             0 or -1
 796  */
 797 static int if_usb_register_dev(wlan_private * priv)
 798 {
 799         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
 800
 801         lbs_deb_enter(LBS_DEB_USB);
 802
 803         cardp->priv = priv;
 804         cardp->eth_dev = priv->wlan_dev.netdev;
 805         priv->hotplug_device = &(cardp->udev->dev);
 806
 807         SET_NETDEV_DEV(cardp->eth_dev, &(cardp->udev->dev));
 808         SET_NETDEV_DEV(priv->mesh_dev, &(cardp->udev->dev));
 809
 810         lbs_deb_usbd(&cardp->udev->dev, "udev pointer is at %p\n",
 811                     cardp->udev);
 812
 813         lbs_deb_leave(LBS_DEB_USB);
 814         return 0;
 815 }
 816
 817
 818
 819 static int if_usb_prog_firmware(wlan_private * priv)
 820 {
 821         struct usb_card_rec *cardp = priv->wlan_dev.card;
 822         int i = 0;
 823         static int reset_count = 10;
 824         int ret = 0;
 825
 826         lbs_deb_enter(LBS_DEB_USB);
 827
 828         cardp->rinfo.priv = priv;
 829
 830 restart:
 831         if (if_usb_submit_rx_urb_fwload(priv) < 0) {
 832                 lbs_deb_usbd(&cardp->udev->dev, "URB submission is failed\n");
 833                 ret = -1;
 834                 goto done;
 835         }
 836
 837         cardp->bootcmdresp = 0;
 838         do {
 839                 int j = 0;
 840                 i++;
 841                 /* Issue Boot command = 1, Boot from Download-FW */
 842                 if_usb_issue_boot_command(priv, BOOT_CMD_FW_BY_USB);
 843                 /* wait for command response */
 844                 do {
 845                         j++;
 846                         msleep_interruptible(100);
 847                 } while (cardp->bootcmdresp == 0 && j < 10);
 848         } while (cardp->bootcmdresp == 0 && i < 5);
 849
 850         if (cardp->bootcmdresp == 0) {
 851                 if (--reset_count >= 0) {
 852                         libertas_do_reset(priv);
 853                         goto restart;
 854                 }
 855                 return -1;
 856         }
 857
 858         i = 0;
 859         priv->adapter->fw_ready = 0;
 860
 861         cardp->totalbytes = 0;
 862         cardp->fwlastblksent = 0;
 863         cardp->CRC_OK = 1;
 864         cardp->fwdnldover = 0;
 865         cardp->fwseqnum = -1;
 866         cardp->totalbytes = 0;
 867         cardp->fwfinalblk = 0;
 868
 869         if_prog_firmware(priv);
 870
 871         do {
 872                 lbs_deb_usbd(&cardp->udev->dev,"Wlan sched timeout\n");
 873                 i++;
 874                 msleep_interruptible(100);
 875                 if (priv->adapter->surpriseremoved || i >= 20)
 876                         break;
 877         } while (!cardp->fwdnldover);
 878
 879         if (!cardp->fwdnldover) {
 880                 lbs_pr_info("failed to load fw, resetting device!\n");
 881                 if (--reset_count >= 0) {
 882                         libertas_do_reset(priv);
 883                         goto restart;
 884                 }
 885
 886                 lbs_pr_info("FW download failure, time = %d ms\n", i * 100);
 887                 ret = -1;
 888                 goto done;
 889         }
 890
 891         if_usb_submit_rx_urb(priv);
 892
 893         /* Delay 200 ms to waiting for the FW ready */
 894         msleep_interruptible(200);
 895
 896         priv->adapter->fw_ready = 1;
 897
 898 done:
 899         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 900         return ret;
 901 }
 902
 903 #ifdef CONFIG_PM
 904 static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)
 905 {
 906         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 907         wlan_private *priv = cardp->priv;
 908
 909         lbs_deb_enter(LBS_DEB_USB);
 910
 911         if (priv->adapter->psstate != PS_STATE_FULL_POWER)
 912                 return -1;
 913
 914         netif_device_detach(cardp->eth_dev);
 915         netif_device_detach(priv->mesh_dev);
 916
 917         /* Unlink tx & rx urb */
 918         usb_kill_urb(cardp->tx_urb);
 919         usb_kill_urb(cardp->rx_urb);
 920
 921         cardp->rx_urb_recall = 1;
 922
 923         lbs_deb_leave(LBS_DEB_USB);
 924         return 0;
 925 }
 926
 927 static int if_usb_resume(struct usb_interface *intf)
 928 {
 929         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 930         wlan_private *priv = cardp->priv;
 931
 932         lbs_deb_enter(LBS_DEB_USB);
 933
 934         cardp->rx_urb_recall = 0;
 935
 936         if_usb_submit_rx_urb(cardp->priv);
 937
 938         netif_device_attach(cardp->eth_dev);
 939         netif_device_attach(priv->mesh_dev);
 940
 941         lbs_deb_leave(LBS_DEB_USB);
 942         return 0;
 943 }
 944 #else
 945 #define if_usb_suspend NULL
 946 #define if_usb_resume NULL
 947 #endif
 948
 949 static struct usb_driver if_usb_driver = {
 950         /* driver name */
 951         .name = usbdriver_name,
 952         /* probe function name */
 953         .probe = if_usb_probe,
 954         /* disconnect function  name */
 955         .disconnect = if_usb_disconnect,
 956         /* device signature table */
 957         .id_table = if_usb_table,
 958         .suspend = if_usb_suspend,
 959         .resume = if_usb_resume,
 960 };
 961
 962 static int if_usb_init_module(void)
 963 {
 964         int ret = 0;
 965
 966         lbs_deb_enter(LBS_DEB_MAIN);
 967
 968         if (libertas_fw_name == NULL) {
 969                 libertas_fw_name = default_fw_name;
 970         }
 971
 972         ret = usb_register(&if_usb_driver);
 973
 974         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
 975         return ret;
 976 }
 977
 978 static void if_usb_exit_module(void)
 979 {
 980         struct list_head *ptr;
 981         struct usb_card_rec *cardp;
 982
 983         lbs_deb_enter(LBS_DEB_MAIN);
 984
 985         list_for_each(ptr, &usb_devices) {
 986                 cardp = list_entry(ptr, struct usb_card_rec, list);
 987                 if_usb_reset_device((wlan_private *) cardp->priv);
 988         }
 989
 990         /* API unregisters the driver from USB subsystem */
 991         usb_deregister(&if_usb_driver);
 992
 993         lbs_deb_leave(LBS_DEB_MAIN);
 994 }
 995
 996 module_init(if_usb_init_module);
 997 module_exit(if_usb_exit_module);
 998
 999 MODULE_DESCRIPTION("8388 USB WLAN Driver");
1000 MODULE_AUTHOR("Marvell International Ltd.");
1001 MODULE_LICENSE("GPL");