drivers/net/wireless/libertas/if_usb.c

   1 /**
   2   * This file contains functions used in USB interface module.
   3   */
   4 #include <linux/delay.h>
   5 #include <linux/moduleparam.h>
   6 #include <linux/firmware.h>
   7 #include <linux/netdevice.h>
   8 #include <linux/list.h>
   9 #include <linux/usb.h>
  10
  11 #define DRV_NAME "usb8xxx"
  12
  13 #include "host.h"
  14 #include "decl.h"
  15 #include "defs.h"
  16 #include "dev.h"
  17 #include "if_usb.h"
  18
  19 #define MESSAGE_HEADER_LEN      4
  20
  21 static const char usbdriver_name[] = "usb8xxx";
  22 static u8 *default_fw_name = "usb8388.bin";
  23
  24 char *libertas_fw_name = NULL;
  25 module_param_named(fw_name, libertas_fw_name, charp, 0644);
  26
  27 /*
  28  * We need to send a RESET command to all USB devices before
  29  * we tear down the USB connection. Otherwise we would not
  30  * be able to re-init device the device if the module gets
  31  * loaded again. This is a list of all initialized USB devices,
  32  * for the reset code see if_usb_reset_device()
  33 */
  34 static LIST_HEAD(usb_devices);
  35
  36 static struct usb_device_id if_usb_table[] = {
  37         /* Enter the device signature inside */
  38         { USB_DEVICE(0x1286, 0x2001) },
  39         { USB_DEVICE(0x05a3, 0x8388) },
  40         {}      /* Terminating entry */
  41 };
  42
  43 MODULE_DEVICE_TABLE(usb, if_usb_table);
  44
  45 static void if_usb_receive(struct urb *urb);
  46 static void if_usb_receive_fwload(struct urb *urb);
  47 static int if_usb_reset_device(wlan_private *priv);
  48 static int if_usb_register_dev(wlan_private * priv);
  49 static int if_usb_unregister_dev(wlan_private *);
  50 static int if_usb_prog_firmware(wlan_private *);
  51 static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb);
  52 static int if_usb_get_int_status(wlan_private * priv, u8 *);
  53 static int if_usb_read_event_cause(wlan_private *);
  54
  55 /**
  56  *  @brief  call back function to handle the status of the URB
  57  *  @param urb          pointer to urb structure
  58  *  @return             N/A
  59  */
  60 static void if_usb_write_bulk_callback(struct urb *urb)
  61 {
  62         wlan_private *priv = (wlan_private *) (urb->context);
  63         wlan_adapter *adapter = priv->adapter;
  64         struct net_device *dev = priv->dev;
  65
  66         /* handle the transmission complete validations */
  67
  68         if (urb->status != 0) {
  69                 /* print the failure status number for debug */
  70                 lbs_pr_info("URB in failure status: %d\n", urb->status);
  71         } else {
  72                 /*
  73                 lbs_deb_usbd(&urb->dev->dev, "URB status is successfull\n");
  74                 lbs_deb_usbd(&urb->dev->dev, "Actual length transmitted %d\n",
  75                        urb->actual_length);
  76                 */
  77                 priv->dnld_sent = DNLD_RES_RECEIVED;
  78                 /* Wake main thread if commands are pending */
  79                 if (!adapter->cur_cmd)
  80                         wake_up_interruptible(&priv->mainthread.waitq);
  81                 if ((adapter->connect_status == libertas_connected)) {
  82                         netif_wake_queue(dev);
  83                         netif_wake_queue(priv->mesh_dev);
  84                 }
  85         }
  86
  87         return;
  88 }
  89
  90 /**
  91  *  @brief  free tx/rx urb, skb and rx buffer
  92  *  @param cardp        pointer usb_card_rec
  93  *  @return             N/A
  94  */
  95 void if_usb_free(struct usb_card_rec *cardp)
  96 {
  97         lbs_deb_enter(LBS_DEB_USB);
  98
  99         /* Unlink tx & rx urb */
 100         usb_kill_urb(cardp->tx_urb);
 101         usb_kill_urb(cardp->rx_urb);
 102
 103         usb_free_urb(cardp->tx_urb);
 104         cardp->tx_urb = NULL;
 105
 106         usb_free_urb(cardp->rx_urb);
 107         cardp->rx_urb = NULL;
 108
 109         kfree(cardp->bulk_out_buffer);
 110         cardp->bulk_out_buffer = NULL;
 111
 112         lbs_deb_leave(LBS_DEB_USB);
 113 }
 114
 115 /**
 116  *  @brief sets the configuration values
 117  *  @param ifnum        interface number
 118  *  @param id           pointer to usb_device_id
 119  *  @return             0 on success, error code on failure
 120  */
 121 static int if_usb_probe(struct usb_interface *intf,
 122                         const struct usb_device_id *id)
 123 {
 124         struct usb_device *udev;
 125         struct usb_host_interface *iface_desc;
 126         struct usb_endpoint_descriptor *endpoint;
 127         wlan_private *priv;
 128         struct usb_card_rec *cardp;
 129         int i;
 130
 131         udev = interface_to_usbdev(intf);
 132
 133         cardp = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
 134         if (!cardp) {
 135                 lbs_pr_err("Out of memory allocating private data.\n");
 136                 goto error;
 137         }
 138
 139         cardp->udev = udev;
 140         iface_desc = intf->cur_altsetting;
 141
 142         lbs_deb_usbd(&udev->dev, "bcdUSB = 0x%X bDeviceClass = 0x%X"
 143                " bDeviceSubClass = 0x%X, bDeviceProtocol = 0x%X\n",
 144                udev->descriptor.bcdUSB,
 145                udev->descriptor.bDeviceClass,
 146                udev->descriptor.bDeviceSubClass,
 147                udev->descriptor.bDeviceProtocol);
 148
 149         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 150                 endpoint = &iface_desc->endpoint[i].desc;
 151                 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
 152                     && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 153                         USB_ENDPOINT_XFER_BULK)) {
 154                         /* we found a bulk in endpoint */
 155                         lbs_deb_usbd(&udev->dev, "Bulk in size is %d\n",
 156                                endpoint->wMaxPacketSize);
 157                         if (!
 158                             (cardp->rx_urb =
 159                              usb_alloc_urb(0, GFP_KERNEL))) {
 160                                 lbs_deb_usbd(&udev->dev,
 161                                        "Rx URB allocation failed\n");
 162                                 goto dealloc;
 163                         }
 164                         cardp->rx_urb_recall = 0;
 165
 166                         cardp->bulk_in_size =
 167                             endpoint->wMaxPacketSize;
 168                         cardp->bulk_in_endpointAddr =
 169                             (endpoint->
 170                              bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 171                         lbs_deb_usbd(&udev->dev, "in_endpoint = %d\n",
 172                                endpoint->bEndpointAddress);
 173                 }
 174
 175                 if (((endpoint->
 176                       bEndpointAddress & USB_ENDPOINT_DIR_MASK) ==
 177                      USB_DIR_OUT)
 178                     && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 179                         USB_ENDPOINT_XFER_BULK)) {
 180                         /* We found bulk out endpoint */
 181                         if (!
 182                             (cardp->tx_urb =
 183                              usb_alloc_urb(0, GFP_KERNEL))) {
 184                                 lbs_deb_usbd(&udev->dev,
 185                                        "Tx URB allocation failed\n");
 186                                 goto dealloc;
 187                         }
 188
 189                         cardp->bulk_out_size =
 190                             endpoint->wMaxPacketSize;
 191                         lbs_deb_usbd(&udev->dev,
 192                                     "Bulk out size is %d\n",
 193                                     endpoint->wMaxPacketSize);
 194                         cardp->bulk_out_endpointAddr =
 195                             endpoint->bEndpointAddress;
 196                         lbs_deb_usbd(&udev->dev, "out_endpoint = %d\n",
 197                                     endpoint->bEndpointAddress);
 198                         cardp->bulk_out_buffer =
 199                             kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE,
 200                                     GFP_KERNEL);
 201
 202                         if (!cardp->bulk_out_buffer) {
 203                                 lbs_deb_usbd(&udev->dev,
 204                                        "Could not allocate buffer\n");
 205                                 goto dealloc;
 206                         }
 207                 }
 208         }
 209
 210
 211         /* At this point libertas_add_card() will be called.  Don't worry
 212          * about keeping pwlanpriv around since it will be set on our
 213          * usb device data in -> add() -> hw_register_dev() -> if_usb_register_dev.
 214          */
 215         if (!(priv = libertas_add_card(cardp)))
 216                 goto dealloc;
 217
 218         if (libertas_add_mesh(priv))
 219                 goto err_add_mesh;
 220
 221         priv->hw_register_dev = if_usb_register_dev;
 222         priv->hw_unregister_dev = if_usb_unregister_dev;
 223         priv->hw_prog_firmware = if_usb_prog_firmware;
 224         priv->hw_host_to_card = if_usb_host_to_card;
 225         priv->hw_get_int_status = if_usb_get_int_status;
 226         priv->hw_read_event_cause = if_usb_read_event_cause;
 227
 228         if (libertas_activate_card(priv, libertas_fw_name))
 229                 goto err_activate_card;
 230
 231         list_add_tail(&cardp->list, &usb_devices);
 232
 233         usb_get_dev(udev);
 234         usb_set_intfdata(intf, cardp);
 235
 236         return 0;
 237
 238 err_activate_card:
 239         unregister_netdev(priv->mesh_dev);
 240         free_netdev(priv->mesh_dev);
 241 err_add_mesh:
 242         free_netdev(priv->dev);
 243         kfree(priv->adapter);
 244 dealloc:
 245         if_usb_free(cardp);
 246
 247 error:
 248         return -ENOMEM;
 249 }
 250
 251 /**
 252  *  @brief free resource and cleanup
 253  *  @param intf         USB interface structure
 254  *  @return             N/A
 255  */
 256 static void if_usb_disconnect(struct usb_interface *intf)
 257 {
 258         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 259         wlan_private *priv = (wlan_private *) cardp->priv;
 260         wlan_adapter *adapter = NULL;
 261
 262         adapter = priv->adapter;
 263
 264         /*
 265          * Update Surprise removed to TRUE
 266          */
 267         adapter->surpriseremoved = 1;
 268
 269         list_del(&cardp->list);
 270
 271         /* card is removed and we can call wlan_remove_card */
 272         lbs_deb_usbd(&cardp->udev->dev, "call remove card\n");
 273         libertas_remove_mesh(priv);
 274         libertas_remove_card(priv);
 275
 276         /* Unlink and free urb */
 277         if_usb_free(cardp);
 278
 279         usb_set_intfdata(intf, NULL);
 280         usb_put_dev(interface_to_usbdev(intf));
 281
 282         return;
 283 }
 284
 285 /**
 286  *  @brief  This function download FW
 287  *  @param priv         pointer to wlan_private
 288  *  @return             0
 289  */
 290 static int if_prog_firmware(wlan_private * priv)
 291 {
 292         struct usb_card_rec *cardp = priv->card;
 293         struct FWData *fwdata;
 294         struct fwheader *fwheader;
 295         u8 *firmware = priv->firmware->data;
 296
 297         fwdata = kmalloc(sizeof(struct FWData), GFP_ATOMIC);
 298
 299         if (!fwdata)
 300                 return -1;
 301
 302         fwheader = &fwdata->fwheader;
 303
 304         if (!cardp->CRC_OK) {
 305                 cardp->totalbytes = cardp->fwlastblksent;
 306                 cardp->fwseqnum = cardp->lastseqnum - 1;
 307         }
 308
 309         /*
 310         lbs_deb_usbd(&cardp->udev->dev, "totalbytes = %d\n",
 311                     cardp->totalbytes);
 312         */
 313
 314         memcpy(fwheader, &firmware[cardp->totalbytes],
 315                sizeof(struct fwheader));
 316
 317         cardp->fwlastblksent = cardp->totalbytes;
 318         cardp->totalbytes += sizeof(struct fwheader);
 319
 320         /* lbs_deb_usbd(&cardp->udev->dev,"Copy Data\n"); */
 321         memcpy(fwdata->data, &firmware[cardp->totalbytes],
 322                fwdata->fwheader.datalength);
 323
 324         /*
 325         lbs_deb_usbd(&cardp->udev->dev,
 326                     "Data length = %d\n", fwdata->fwheader.datalength);
 327         */
 328
 329         cardp->fwseqnum = cardp->fwseqnum + 1;
 330
 331         fwdata->seqnum = cardp->fwseqnum;
 332         cardp->lastseqnum = fwdata->seqnum;
 333         cardp->totalbytes += fwdata->fwheader.datalength;
 334
 335         if (fwheader->dnldcmd == FW_HAS_DATA_TO_RECV) {
 336                 /*
 337                 lbs_deb_usbd(&cardp->udev->dev, "There is data to follow\n");
 338                 lbs_deb_usbd(&cardp->udev->dev,
 339                             "seqnum = %d totalbytes = %d\n", cardp->fwseqnum,
 340                             cardp->totalbytes);
 341                 */
 342                 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
 343                 usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
 344
 345         } else if (fwdata->fwheader.dnldcmd == FW_HAS_LAST_BLOCK) {
 346                 /*
 347                 lbs_deb_usbd(&cardp->udev->dev,
 348                             "Host has finished FW downloading\n");
 349                 lbs_deb_usbd(&cardp->udev->dev,
 350                             "Donwloading FW JUMP BLOCK\n");
 351                 */
 352                 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
 353                 usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
 354                 cardp->fwfinalblk = 1;
 355         }
 356
 357         /*
 358         lbs_deb_usbd(&cardp->udev->dev,
 359                     "The firmware download is done size is %d\n",
 360                     cardp->totalbytes);
 361         */
 362
 363         kfree(fwdata);
 364
 365         return 0;
 366 }
 367
 368 static int libertas_do_reset(wlan_private *priv)
 369 {
 370         int ret;
 371         struct usb_card_rec *cardp = priv->card;
 372
 373         lbs_deb_enter(LBS_DEB_USB);
 374
 375         ret = usb_reset_device(cardp->udev);
 376         if (!ret) {
 377                 msleep(10);
 378                 if_usb_reset_device(priv);
 379                 msleep(10);
 380         }
 381
 382         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 383
 384         return ret;
 385 }
 386
 387 /**
 388  *  @brief This function transfer the data to the device.
 389  *  @param priv         pointer to wlan_private
 390  *  @param payload      pointer to payload data
 391  *  @param nb           data length
 392  *  @return             0 or -1
 393  */
 394 int usb_tx_block(wlan_private * priv, u8 * payload, u16 nb)
 395 {
 396         /* pointer to card structure */
 397         struct usb_card_rec *cardp = priv->card;
 398         int ret = -1;
 399
 400         /* check if device is removed */
 401         if (priv->adapter->surpriseremoved) {
 402                 lbs_deb_usbd(&cardp->udev->dev, "Device removed\n");
 403                 goto tx_ret;
 404         }
 405
 406         usb_fill_bulk_urb(cardp->tx_urb, cardp->udev,
 407                           usb_sndbulkpipe(cardp->udev,
 408                                           cardp->bulk_out_endpointAddr),
 409                           payload, nb, if_usb_write_bulk_callback, priv);
 410
 411         cardp->tx_urb->transfer_flags |= URB_ZERO_PACKET;
 412
 413         if ((ret = usb_submit_urb(cardp->tx_urb, GFP_ATOMIC))) {
 414                 /*  transfer failed */
 415                 lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb failed\n");
 416                 ret = -1;
 417         } else {
 418                 /* lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb success\n"); */
 419                 ret = 0;
 420         }
 421
 422 tx_ret:
 423         return ret;
 424 }
 425
 426 static int __if_usb_submit_rx_urb(wlan_private * priv,
 427                                   void (*callbackfn)
 428                                   (struct urb *urb))
 429 {
 430         struct usb_card_rec *cardp = priv->card;
 431         struct sk_buff *skb;
 432         struct read_cb_info *rinfo = &cardp->rinfo;
 433         int ret = -1;
 434
 435         if (!(skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE))) {
 436                 lbs_pr_err("No free skb\n");
 437                 goto rx_ret;
 438         }
 439
 440         rinfo->skb = skb;
 441
 442         /* Fill the receive configuration URB and initialise the Rx call back */
 443         usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
 444                           usb_rcvbulkpipe(cardp->udev,
 445                                           cardp->bulk_in_endpointAddr),
 446                           (void *) (skb->tail + (size_t) IPFIELD_ALIGN_OFFSET),
 447                           MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn,
 448                           rinfo);
 449
 450         cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;
 451
 452         /* lbs_deb_usbd(&cardp->udev->dev, "Pointer for rx_urb %p\n", cardp->rx_urb); */
 453         if ((ret = usb_submit_urb(cardp->rx_urb, GFP_ATOMIC))) {
 454                 /* handle failure conditions */
 455                 lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB failed\n");
 456                 ret = -1;
 457         } else {
 458                 /* lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB success\n"); */
 459                 ret = 0;
 460         }
 461
 462 rx_ret:
 463         return ret;
 464 }
 465
 466 static inline int if_usb_submit_rx_urb_fwload(wlan_private * priv)
 467 {
 468         return __if_usb_submit_rx_urb(priv, &if_usb_receive_fwload);
 469 }
 470
 471 static inline int if_usb_submit_rx_urb(wlan_private * priv)
 472 {
 473         return __if_usb_submit_rx_urb(priv, &if_usb_receive);
 474 }
 475
 476 static void if_usb_receive_fwload(struct urb *urb)
 477 {
 478         struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
 479         wlan_private *priv = rinfo->priv;
 480         struct sk_buff *skb = rinfo->skb;
 481         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
 482         struct fwsyncheader *syncfwheader;
 483         struct bootcmdrespStr bootcmdresp;
 484
 485         if (urb->status) {
 486                 lbs_deb_usbd(&cardp->udev->dev,
 487                             "URB status is failed during fw load\n");
 488                 kfree_skb(skb);
 489                 return;
 490         }
 491
 492         if (cardp->bootcmdresp == 0) {
 493                 memcpy (&bootcmdresp, skb->data + IPFIELD_ALIGN_OFFSET,
 494                         sizeof(bootcmdresp));
 495                 if (cardp->udev->descriptor.bcdDevice < 0x3106) {
 496                         kfree_skb(skb);
 497                         if_usb_submit_rx_urb_fwload(priv);
 498                         cardp->bootcmdresp = 1;
 499                         lbs_deb_usbd(&cardp->udev->dev,
 500                                     "Received valid boot command response\n");
 501                         return;
 502                 }
 503                 if (bootcmdresp.u32magicnumber != BOOT_CMD_MAGIC_NUMBER) {
 504                         lbs_pr_info(
 505                                 "boot cmd response wrong magic number (0x%x)\n",
 506                                 bootcmdresp.u32magicnumber);
 507                 } else if (bootcmdresp.u8cmd_tag != BOOT_CMD_FW_BY_USB) {
 508                         lbs_pr_info(
 509                                 "boot cmd response cmd_tag error (%d)\n",
 510                                 bootcmdresp.u8cmd_tag);
 511                 } else if (bootcmdresp.u8result != BOOT_CMD_RESP_OK) {
 512                         lbs_pr_info(
 513                                 "boot cmd response result error (%d)\n",
 514                                 bootcmdresp.u8result);
 515                 } else {
 516                         cardp->bootcmdresp = 1;
 517                         lbs_deb_usbd(&cardp->udev->dev,
 518                                     "Received valid boot command response\n");
 519                 }
 520                 kfree_skb(skb);
 521                 if_usb_submit_rx_urb_fwload(priv);
 522                 return;
 523         }
 524
 525         syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
 526         if (!syncfwheader) {
 527                 lbs_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
 528                 kfree_skb(skb);
 529                 return;
 530         }
 531
 532         memcpy(syncfwheader, skb->data + IPFIELD_ALIGN_OFFSET,
 533                         sizeof(struct fwsyncheader));
 534
 535         if (!syncfwheader->cmd) {
 536                 /*
 537                 lbs_deb_usbd(&cardp->udev->dev,
 538                             "FW received Blk with correct CRC\n");
 539                 lbs_deb_usbd(&cardp->udev->dev,
 540                             "FW received Blk seqnum = %d\n",
 541                        syncfwheader->seqnum);
 542                 */
 543                 cardp->CRC_OK = 1;
 544         } else {
 545                 lbs_deb_usbd(&cardp->udev->dev,
 546                             "FW received Blk with CRC error\n");
 547                 cardp->CRC_OK = 0;
 548         }
 549
 550         kfree_skb(skb);
 551
 552         if (cardp->fwfinalblk) {
 553                 cardp->fwdnldover = 1;
 554                 goto exit;
 555         }
 556
 557         if_prog_firmware(priv);
 558
 559         if_usb_submit_rx_urb_fwload(priv);
 560 exit:
 561         kfree(syncfwheader);
 562
 563         return;
 564
 565 }
 566
 567 #define MRVDRV_MIN_PKT_LEN      30
 568
 569 static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
 570                                        struct usb_card_rec *cardp,
 571                                        wlan_private *priv)
 572 {
 573         if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE +
 574             MESSAGE_HEADER_LEN || recvlength < MRVDRV_MIN_PKT_LEN) {
 575                 lbs_deb_usbd(&cardp->udev->dev,
 576                             "Packet length is Invalid\n");
 577                 kfree_skb(skb);
 578                 return;
 579         }
 580
 581         skb_reserve(skb, IPFIELD_ALIGN_OFFSET);
 582         skb_put(skb, recvlength);
 583         skb_pull(skb, MESSAGE_HEADER_LEN);
 584         libertas_process_rxed_packet(priv, skb);
 585         priv->upld_len = (recvlength - MESSAGE_HEADER_LEN);
 586 }
 587
 588 static inline void process_cmdrequest(int recvlength, u8 *recvbuff,
 589                                       struct sk_buff *skb,
 590                                       struct usb_card_rec *cardp,
 591                                       wlan_private *priv)
 592 {
 593         u8 *cmdbuf;
 594         if (recvlength > MRVDRV_SIZE_OF_CMD_BUFFER) {
 595                 lbs_deb_usbd(&cardp->udev->dev,
 596                             "The receive buffer is too large\n");
 597                 kfree_skb(skb);
 598                 return;
 599         }
 600
 601         if (!in_interrupt())
 602                 BUG();
 603
 604         spin_lock(&priv->adapter->driver_lock);
 605         /* take care of cur_cmd = NULL case by reading the
 606          * data to clear the interrupt */
 607         if (!priv->adapter->cur_cmd) {
 608                 cmdbuf = priv->upld_buf;
 609                 priv->adapter->hisregcpy &= ~his_cmdupldrdy;
 610         } else
 611                 cmdbuf = priv->adapter->cur_cmd->bufvirtualaddr;
 612
 613         cardp->usb_int_cause |= his_cmdupldrdy;
 614         priv->upld_len = (recvlength - MESSAGE_HEADER_LEN);
 615         memcpy(cmdbuf, recvbuff + MESSAGE_HEADER_LEN,
 616                priv->upld_len);
 617
 618         kfree_skb(skb);
 619         libertas_interrupt(priv->dev);
 620         spin_unlock(&priv->adapter->driver_lock);
 621
 622         lbs_deb_usbd(&cardp->udev->dev,
 623                     "Wake up main thread to handle cmd response\n");
 624
 625         return;
 626 }
 627
 628 /**
 629  *  @brief This function reads of the packet into the upload buff,
 630  *  wake up the main thread and initialise the Rx callack.
 631  *
 632  *  @param urb          pointer to struct urb
 633  *  @return             N/A
 634  */
 635 static void if_usb_receive(struct urb *urb)
 636 {
 637         struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
 638         wlan_private *priv = rinfo->priv;
 639         struct sk_buff *skb = rinfo->skb;
 640         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
 641
 642         int recvlength = urb->actual_length;
 643         u8 *recvbuff = NULL;
 644         u32 recvtype;
 645
 646         lbs_deb_enter(LBS_DEB_USB);
 647
 648         if (recvlength) {
 649                 if (urb->status) {
 650                         lbs_deb_usbd(&cardp->udev->dev,
 651                                     "URB status is failed\n");
 652                         kfree_skb(skb);
 653                         goto setup_for_next;
 654                 }
 655
 656                 recvbuff = skb->data + IPFIELD_ALIGN_OFFSET;
 657                 memcpy(&recvtype, recvbuff, sizeof(u32));
 658                 lbs_deb_usbd(&cardp->udev->dev,
 659                             "Recv length = 0x%x\n", recvlength);
 660                 lbs_deb_usbd(&cardp->udev->dev,
 661                             "Receive type = 0x%X\n", recvtype);
 662                 recvtype = le32_to_cpu(recvtype);
 663                 lbs_deb_usbd(&cardp->udev->dev,
 664                             "Receive type after = 0x%X\n", recvtype);
 665         } else if (urb->status)
 666                 goto rx_exit;
 667
 668
 669         switch (recvtype) {
 670         case CMD_TYPE_DATA:
 671                 process_cmdtypedata(recvlength, skb, cardp, priv);
 672                 break;
 673
 674         case CMD_TYPE_REQUEST:
 675                 process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
 676                 break;
 677
 678         case CMD_TYPE_INDICATION:
 679                 /* Event cause handling */
 680                 spin_lock(&priv->adapter->driver_lock);
 681                 cardp->usb_event_cause = *(u32 *) (recvbuff + MESSAGE_HEADER_LEN);
 682                 lbs_deb_usbd(&cardp->udev->dev,"**EVENT** 0x%X\n",
 683                             cardp->usb_event_cause);
 684                 if (cardp->usb_event_cause & 0xffff0000) {
 685                         libertas_send_tx_feedback(priv);
 686                         spin_unlock(&priv->adapter->driver_lock);
 687                         break;
 688                 }
 689                 cardp->usb_event_cause = le32_to_cpu(cardp->usb_event_cause) << 3;
 690                 cardp->usb_int_cause |= his_cardevent;
 691                 kfree_skb(skb);
 692                 libertas_interrupt(priv->dev);
 693                 spin_unlock(&priv->adapter->driver_lock);
 694                 goto rx_exit;
 695         default:
 696                 kfree_skb(skb);
 697                 break;
 698         }
 699
 700 setup_for_next:
 701         if_usb_submit_rx_urb(priv);
 702 rx_exit:
 703         lbs_deb_leave(LBS_DEB_USB);
 704 }
 705
 706 /**
 707  *  @brief This function downloads data to FW
 708  *  @param priv         pointer to wlan_private structure
 709  *  @param type         type of data
 710  *  @param buf          pointer to data buffer
 711  *  @param len          number of bytes
 712  *  @return             0 or -1
 713  */
 714 static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb)
 715 {
 716         int ret = -1;
 717         u32 tmp;
 718         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
 719
 720         lbs_deb_usbd(&cardp->udev->dev,"*** type = %u\n", type);
 721         lbs_deb_usbd(&cardp->udev->dev,"size after = %d\n", nb);
 722
 723         if (type == MVMS_CMD) {
 724                 tmp = cpu_to_le32(CMD_TYPE_REQUEST);
 725                 priv->dnld_sent = DNLD_CMD_SENT;
 726                 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
 727                        MESSAGE_HEADER_LEN);
 728
 729         } else {
 730                 tmp = cpu_to_le32(CMD_TYPE_DATA);
 731                 priv->dnld_sent = DNLD_DATA_SENT;
 732                 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
 733                        MESSAGE_HEADER_LEN);
 734         }
 735
 736         memcpy((cardp->bulk_out_buffer + MESSAGE_HEADER_LEN), payload, nb);
 737
 738         ret =
 739             usb_tx_block(priv, cardp->bulk_out_buffer, nb + MESSAGE_HEADER_LEN);
 740
 741         return ret;
 742 }
 743
 744 /* called with adapter->driver_lock held */
 745 static int if_usb_get_int_status(wlan_private * priv, u8 * ireg)
 746 {
 747         struct usb_card_rec *cardp = priv->card;
 748
 749         *ireg = cardp->usb_int_cause;
 750         cardp->usb_int_cause = 0;
 751
 752         lbs_deb_usbd(&cardp->udev->dev,"Int cause is 0x%X\n", *ireg);
 753
 754         return 0;
 755 }
 756
 757 static int if_usb_read_event_cause(wlan_private * priv)
 758 {
 759         struct usb_card_rec *cardp = priv->card;
 760         priv->adapter->eventcause = cardp->usb_event_cause;
 761         /* Re-submit rx urb here to avoid event lost issue */
 762         if_usb_submit_rx_urb(priv);
 763         return 0;
 764 }
 765
 766 static int if_usb_reset_device(wlan_private *priv)
 767 {
 768         int ret;
 769
 770         lbs_deb_enter(LBS_DEB_USB);
 771         ret = libertas_prepare_and_send_command(priv, cmd_802_11_reset,
 772                                     cmd_act_halt, 0, 0, NULL);
 773         msleep_interruptible(10);
 774
 775         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 776         return ret;
 777 }
 778
 779 static int if_usb_unregister_dev(wlan_private * priv)
 780 {
 781         int ret = 0;
 782
 783         /* Need to send a Reset command to device before USB resources freed
 784          * and wlan_remove_card() called, then device can handle FW download
 785          * again.
 786          */
 787         if (priv)
 788                 if_usb_reset_device(priv);
 789
 790         return ret;
 791 }
 792
 793
 794 /**
 795  *  @brief  This function register usb device and initialize parameter
 796  *  @param              priv pointer to wlan_private
 797  *  @return             0 or -1
 798  */
 799 static int if_usb_register_dev(wlan_private * priv)
 800 {
 801         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
 802
 803         lbs_deb_enter(LBS_DEB_USB);
 804
 805         cardp->priv = priv;
 806         cardp->eth_dev = priv->dev;
 807         priv->hotplug_device = &(cardp->udev->dev);
 808
 809         SET_NETDEV_DEV(cardp->eth_dev, &(cardp->udev->dev));
 810         SET_NETDEV_DEV(priv->mesh_dev, &(cardp->udev->dev));
 811
 812         lbs_deb_usbd(&cardp->udev->dev, "udev pointer is at %p\n",
 813                     cardp->udev);
 814
 815         lbs_deb_leave(LBS_DEB_USB);
 816         return 0;
 817 }
 818
 819
 820
 821 static int if_usb_prog_firmware(wlan_private * priv)
 822 {
 823         struct usb_card_rec *cardp = priv->card;
 824         int i = 0;
 825         static int reset_count = 10;
 826         int ret = 0;
 827
 828         lbs_deb_enter(LBS_DEB_USB);
 829
 830         cardp->rinfo.priv = priv;
 831
 832 restart:
 833         if (if_usb_submit_rx_urb_fwload(priv) < 0) {
 834                 lbs_deb_usbd(&cardp->udev->dev, "URB submission is failed\n");
 835                 ret = -1;
 836                 goto done;
 837         }
 838
 839         cardp->bootcmdresp = 0;
 840         do {
 841                 int j = 0;
 842                 i++;
 843                 /* Issue Boot command = 1, Boot from Download-FW */
 844                 if_usb_issue_boot_command(priv, BOOT_CMD_FW_BY_USB);
 845                 /* wait for command response */
 846                 do {
 847                         j++;
 848                         msleep_interruptible(100);
 849                 } while (cardp->bootcmdresp == 0 && j < 10);
 850         } while (cardp->bootcmdresp == 0 && i < 5);
 851
 852         if (cardp->bootcmdresp == 0) {
 853                 if (--reset_count >= 0) {
 854                         libertas_do_reset(priv);
 855                         goto restart;
 856                 }
 857                 return -1;
 858         }
 859
 860         i = 0;
 861         priv->adapter->fw_ready = 0;
 862
 863         cardp->totalbytes = 0;
 864         cardp->fwlastblksent = 0;
 865         cardp->CRC_OK = 1;
 866         cardp->fwdnldover = 0;
 867         cardp->fwseqnum = -1;
 868         cardp->totalbytes = 0;
 869         cardp->fwfinalblk = 0;
 870
 871         if_prog_firmware(priv);
 872
 873         do {
 874                 lbs_deb_usbd(&cardp->udev->dev,"Wlan sched timeout\n");
 875                 i++;
 876                 msleep_interruptible(100);
 877                 if (priv->adapter->surpriseremoved || i >= 20)
 878                         break;
 879         } while (!cardp->fwdnldover);
 880
 881         if (!cardp->fwdnldover) {
 882                 lbs_pr_info("failed to load fw, resetting device!\n");
 883                 if (--reset_count >= 0) {
 884                         libertas_do_reset(priv);
 885                         goto restart;
 886                 }
 887
 888                 lbs_pr_info("FW download failure, time = %d ms\n", i * 100);
 889                 ret = -1;
 890                 goto done;
 891         }
 892
 893         if_usb_submit_rx_urb(priv);
 894
 895         /* Delay 200 ms to waiting for the FW ready */
 896         msleep_interruptible(200);
 897
 898         priv->adapter->fw_ready = 1;
 899
 900 done:
 901         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 902         return ret;
 903 }
 904
 905 #ifdef CONFIG_PM
 906 static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)
 907 {
 908         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 909         wlan_private *priv = cardp->priv;
 910
 911         lbs_deb_enter(LBS_DEB_USB);
 912
 913         if (priv->adapter->psstate != PS_STATE_FULL_POWER)
 914                 return -1;
 915
 916         netif_device_detach(cardp->eth_dev);
 917         netif_device_detach(priv->mesh_dev);
 918
 919         /* Unlink tx & rx urb */
 920         usb_kill_urb(cardp->tx_urb);
 921         usb_kill_urb(cardp->rx_urb);
 922
 923         cardp->rx_urb_recall = 1;
 924
 925         lbs_deb_leave(LBS_DEB_USB);
 926         return 0;
 927 }
 928
 929 static int if_usb_resume(struct usb_interface *intf)
 930 {
 931         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 932         wlan_private *priv = cardp->priv;
 933
 934         lbs_deb_enter(LBS_DEB_USB);
 935
 936         cardp->rx_urb_recall = 0;
 937
 938         if_usb_submit_rx_urb(cardp->priv);
 939
 940         netif_device_attach(cardp->eth_dev);
 941         netif_device_attach(priv->mesh_dev);
 942
 943         lbs_deb_leave(LBS_DEB_USB);
 944         return 0;
 945 }
 946 #else
 947 #define if_usb_suspend NULL
 948 #define if_usb_resume NULL
 949 #endif
 950
 951 static struct usb_driver if_usb_driver = {
 952         /* driver name */
 953         .name = usbdriver_name,
 954         /* probe function name */
 955         .probe = if_usb_probe,
 956         /* disconnect function  name */
 957         .disconnect = if_usb_disconnect,
 958         /* device signature table */
 959         .id_table = if_usb_table,
 960         .suspend = if_usb_suspend,
 961         .resume = if_usb_resume,
 962 };
 963
 964 static int if_usb_init_module(void)
 965 {
 966         int ret = 0;
 967
 968         lbs_deb_enter(LBS_DEB_MAIN);
 969
 970         if (libertas_fw_name == NULL) {
 971                 libertas_fw_name = default_fw_name;
 972         }
 973
 974         ret = usb_register(&if_usb_driver);
 975
 976         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
 977         return ret;
 978 }
 979
 980 static void if_usb_exit_module(void)
 981 {
 982         struct list_head *ptr;
 983         struct usb_card_rec *cardp;
 984
 985         lbs_deb_enter(LBS_DEB_MAIN);
 986
 987         list_for_each(ptr, &usb_devices) {
 988                 cardp = list_entry(ptr, struct usb_card_rec, list);
 989                 if_usb_reset_device((wlan_private *) cardp->priv);
 990         }
 991
 992         /* API unregisters the driver from USB subsystem */
 993         usb_deregister(&if_usb_driver);
 994
 995         lbs_deb_leave(LBS_DEB_MAIN);
 996 }
 997
 998 module_init(if_usb_init_module);
 999 module_exit(if_usb_exit_module);
1000
1001 MODULE_DESCRIPTION("8388 USB WLAN Driver");
1002 MODULE_AUTHOR("Marvell International Ltd.");
1003 MODULE_LICENSE("GPL");