Pileus Git - ~andy/linux/blob - 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/usb.h>
   9
  10 #include "host.h"
  11 #include "decl.h"
  12 #include "defs.h"
  13 #include "dev.h"
  14 #include "if_usb.h"
  15
  16 #define MESSAGE_HEADER_LEN      4
  17
  18 static const char usbdriver_name[] = "usb8xxx";
  19 static u8 *default_fw_name = "usb8388.bin";
  20
  21 char *libertas_fw_name = NULL;
  22 module_param_named(fw_name, libertas_fw_name, charp, 0644);
  23
  24
  25 #define MAX_DEVS 5
  26 static struct net_device *libertas_devs[MAX_DEVS];
  27 static int libertas_found = 0;
  28
  29 static struct usb_device_id if_usb_table[] = {
  30         /* Enter the device signature inside */
  31         { USB_DEVICE(0x1286, 0x2001) },
  32         { USB_DEVICE(0x05a3, 0x8388) },
  33         {}      /* Terminating entry */
  34 };
  35
  36 MODULE_DEVICE_TABLE(usb, if_usb_table);
  37
  38 static void if_usb_receive(struct urb *urb);
  39 static void if_usb_receive_fwload(struct urb *urb);
  40 static int reset_device(wlan_private *priv);
  41 static int if_usb_register_dev(wlan_private * priv);
  42 static int if_usb_unregister_dev(wlan_private *);
  43 static int if_usb_prog_firmware(wlan_private *);
  44 static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb);
  45 static int if_usb_get_int_status(wlan_private * priv, u8 *);
  46 static int if_usb_read_event_cause(wlan_private *);
  47
  48 /**
  49  *  @brief  call back function to handle the status of the URB
  50  *  @param urb          pointer to urb structure
  51  *  @return             N/A
  52  */
  53 static void if_usb_write_bulk_callback(struct urb *urb)
  54 {
  55         wlan_private *priv = (wlan_private *) (urb->context);
  56         wlan_adapter *adapter = priv->adapter;
  57         struct net_device *dev = priv->wlan_dev.netdev;
  58
  59         /* handle the transmission complete validations */
  60
  61         if (urb->status != 0) {
  62                 /* print the failure status number for debug */
  63                 lbs_pr_info("URB in failure status\n");
  64         } else {
  65                 /*
  66                 lbs_deb_usbd(&urb->dev->dev, "URB status is successfull\n");
  67                 lbs_deb_usbd(&urb->dev->dev, "Actual length transmitted %d\n",
  68                        urb->actual_length);
  69                 */
  70                 priv->wlan_dev.dnld_sent = DNLD_RES_RECEIVED;
  71                 /* Wake main thread if commands are pending */
  72                 if (!adapter->cur_cmd)
  73                         wake_up_interruptible(&priv->mainthread.waitq);
  74                 if ((adapter->connect_status == libertas_connected)) {
  75                         netif_wake_queue(dev);
  76                         netif_wake_queue(priv->mesh_dev);
  77                 }
  78         }
  79
  80         return;
  81 }
  82
  83 /**
  84  *  @brief  free tx/rx urb, skb and rx buffer
  85  *  @param cardp        pointer usb_card_rec
  86  *  @return             N/A
  87  */
  88 void if_usb_free(struct usb_card_rec *cardp)
  89 {
  90         lbs_deb_enter(LBS_DEB_USB);
  91
  92         /* Unlink tx & rx urb */
  93         usb_kill_urb(cardp->tx_urb);
  94         usb_kill_urb(cardp->rx_urb);
  95
  96         usb_free_urb(cardp->tx_urb);
  97         cardp->tx_urb = NULL;
  98
  99         usb_free_urb(cardp->rx_urb);
 100         cardp->rx_urb = NULL;
 101
 102         kfree(cardp->bulk_out_buffer);
 103         cardp->bulk_out_buffer = NULL;
 104
 105         lbs_deb_leave(LBS_DEB_USB);
 106 }
 107
 108 /**
 109  *  @brief sets the configuration values
 110  *  @param ifnum        interface number
 111  *  @param id           pointer to usb_device_id
 112  *  @return             0 on success, error code on failure
 113  */
 114 static int if_usb_probe(struct usb_interface *intf,
 115                         const struct usb_device_id *id)
 116 {
 117         struct usb_device *udev;
 118         struct usb_host_interface *iface_desc;
 119         struct usb_endpoint_descriptor *endpoint;
 120         wlan_private *priv;
 121         struct usb_card_rec *usb_cardp;
 122         int i;
 123
 124         udev = interface_to_usbdev(intf);
 125
 126         usb_cardp = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
 127         if (!usb_cardp) {
 128                 lbs_pr_err("Out of memory allocating private data.\n");
 129                 goto error;
 130         }
 131
 132         usb_cardp->udev = udev;
 133         iface_desc = intf->cur_altsetting;
 134
 135         lbs_deb_usbd(&udev->dev, "bcdUSB = 0x%X bDeviceClass = 0x%X"
 136                " bDeviceSubClass = 0x%X, bDeviceProtocol = 0x%X\n",
 137                udev->descriptor.bcdUSB,
 138                udev->descriptor.bDeviceClass,
 139                udev->descriptor.bDeviceSubClass,
 140                udev->descriptor.bDeviceProtocol);
 141
 142         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 143                 endpoint = &iface_desc->endpoint[i].desc;
 144                 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
 145                     && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 146                         USB_ENDPOINT_XFER_BULK)) {
 147                         /* we found a bulk in endpoint */
 148                         lbs_deb_usbd(&udev->dev, "Bulk in size is %d\n",
 149                                endpoint->wMaxPacketSize);
 150                         if (!
 151                             (usb_cardp->rx_urb =
 152                              usb_alloc_urb(0, GFP_KERNEL))) {
 153                                 lbs_deb_usbd(&udev->dev,
 154                                        "Rx URB allocation failed\n");
 155                                 goto dealloc;
 156                         }
 157                         usb_cardp->rx_urb_recall = 0;
 158
 159                         usb_cardp->bulk_in_size =
 160                             endpoint->wMaxPacketSize;
 161                         usb_cardp->bulk_in_endpointAddr =
 162                             (endpoint->
 163                              bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 164                         lbs_deb_usbd(&udev->dev, "in_endpoint = %d\n",
 165                                endpoint->bEndpointAddress);
 166                 }
 167
 168                 if (((endpoint->
 169                       bEndpointAddress & USB_ENDPOINT_DIR_MASK) ==
 170                      USB_DIR_OUT)
 171                     && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 172                         USB_ENDPOINT_XFER_BULK)) {
 173                         /* We found bulk out endpoint */
 174                         if (!
 175                             (usb_cardp->tx_urb =
 176                              usb_alloc_urb(0, GFP_KERNEL))) {
 177                                 lbs_deb_usbd(&udev->dev,
 178                                        "Tx URB allocation failed\n");
 179                                 goto dealloc;
 180                         }
 181
 182                         usb_cardp->bulk_out_size =
 183                             endpoint->wMaxPacketSize;
 184                         lbs_deb_usbd(&udev->dev,
 185                                     "Bulk out size is %d\n",
 186                                     endpoint->wMaxPacketSize);
 187                         usb_cardp->bulk_out_endpointAddr =
 188                             endpoint->bEndpointAddress;
 189                         lbs_deb_usbd(&udev->dev, "out_endpoint = %d\n",
 190                                     endpoint->bEndpointAddress);
 191                         usb_cardp->bulk_out_buffer =
 192                             kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE,
 193                                     GFP_KERNEL);
 194
 195                         if (!usb_cardp->bulk_out_buffer) {
 196                                 lbs_deb_usbd(&udev->dev,
 197                                        "Could not allocate buffer\n");
 198                                 goto dealloc;
 199                         }
 200                 }
 201         }
 202
 203
 204         /* At this point libertas_add_card() will be called.  Don't worry
 205          * about keeping pwlanpriv around since it will be set on our
 206          * usb device data in -> add() -> hw_register_dev() -> if_usb_register_dev.
 207          */
 208         if (!(priv = libertas_add_card(usb_cardp)))
 209                 goto dealloc;
 210
 211         if (libertas_add_mesh(priv))
 212                 goto err_add_mesh;
 213
 214         priv->hw_register_dev = if_usb_register_dev;
 215         priv->hw_unregister_dev = if_usb_unregister_dev;
 216         priv->hw_prog_firmware = if_usb_prog_firmware;
 217         priv->hw_host_to_card = if_usb_host_to_card;
 218         priv->hw_get_int_status = if_usb_get_int_status;
 219         priv->hw_read_event_cause = if_usb_read_event_cause;
 220
 221         if (libertas_activate_card(priv, libertas_fw_name))
 222                 goto err_activate_card;
 223
 224         if (libertas_found < MAX_DEVS) {
 225                 libertas_devs[libertas_found] = priv->wlan_dev.netdev;
 226                 libertas_found++;
 227         }
 228
 229         usb_get_dev(udev);
 230         usb_set_intfdata(intf, usb_cardp);
 231
 232         /*
 233          * return card structure, which can be got back in the
 234          * diconnect function as the ptr
 235          * argument.
 236          */
 237         return 0;
 238
 239 err_activate_card:
 240         unregister_netdev(priv->mesh_dev);
 241         free_netdev(priv->mesh_dev);
 242 err_add_mesh:
 243         free_netdev(priv->wlan_dev.netdev);
 244         kfree(priv->adapter);
 245 dealloc:
 246         if_usb_free(usb_cardp);
 247
 248 error:
 249         return -ENOMEM;
 250 }
 251
 252 /**
 253  *  @brief free resource and cleanup
 254  *  @param udev         pointer to usb_device
 255  *  @param ptr          pointer to usb_cardp
 256  *  @return             N/A
 257  */
 258 static void if_usb_disconnect(struct usb_interface *intf)
 259 {
 260         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 261         wlan_private *priv = (wlan_private *) cardp->priv;
 262         wlan_adapter *adapter = NULL;
 263         int i;
 264
 265         adapter = priv->adapter;
 266
 267         /*
 268          * Update Surprise removed to TRUE
 269          */
 270         adapter->surpriseremoved = 1;
 271
 272         for (i = 0; i<libertas_found; i++) {
 273                 if (libertas_devs[i]==priv->wlan_dev.netdev) {
 274                         libertas_devs[i] = libertas_devs[--libertas_found];
 275                         libertas_devs[libertas_found] = NULL ;
 276                         break;
 277                 }
 278         }
 279
 280         /* card is removed and we can call wlan_remove_card */
 281         lbs_deb_usbd(&cardp->udev->dev, "call remove card\n");
 282         libertas_remove_mesh(priv);
 283         libertas_remove_card(priv);
 284
 285         /* Unlink and free urb */
 286         if_usb_free(cardp);
 287
 288         usb_set_intfdata(intf, NULL);
 289         usb_put_dev(interface_to_usbdev(intf));
 290
 291         return;
 292 }
 293
 294 /**
 295  *  @brief  This function download FW
 296  *  @param priv         pointer to wlan_private
 297  *  @return             0
 298  */
 299 static int if_prog_firmware(wlan_private * priv)
 300 {
 301         struct usb_card_rec *cardp = priv->wlan_dev.card;
 302         struct FWData *fwdata;
 303         struct fwheader *fwheader;
 304         u8 *firmware = priv->firmware->data;
 305
 306         fwdata = kmalloc(sizeof(struct FWData), GFP_ATOMIC);
 307
 308         if (!fwdata)
 309                 return -1;
 310
 311         fwheader = &fwdata->fwheader;
 312
 313         if (!cardp->CRC_OK) {
 314                 cardp->totalbytes = cardp->fwlastblksent;
 315                 cardp->fwseqnum = cardp->lastseqnum - 1;
 316         }
 317
 318         /*
 319         lbs_deb_usbd(&cardp->udev->dev, "totalbytes = %d\n",
 320                     cardp->totalbytes);
 321         */
 322
 323         memcpy(fwheader, &firmware[cardp->totalbytes],
 324                sizeof(struct fwheader));
 325
 326         cardp->fwlastblksent = cardp->totalbytes;
 327         cardp->totalbytes += sizeof(struct fwheader);
 328
 329         /* lbs_deb_usbd(&cardp->udev->dev,"Copy Data\n"); */
 330         memcpy(fwdata->data, &firmware[cardp->totalbytes],
 331                fwdata->fwheader.datalength);
 332
 333         /*
 334         lbs_deb_usbd(&cardp->udev->dev,
 335                     "Data length = %d\n", fwdata->fwheader.datalength);
 336         */
 337
 338         cardp->fwseqnum = cardp->fwseqnum + 1;
 339
 340         fwdata->seqnum = cardp->fwseqnum;
 341         cardp->lastseqnum = fwdata->seqnum;
 342         cardp->totalbytes += fwdata->fwheader.datalength;
 343
 344         if (fwheader->dnldcmd == FW_HAS_DATA_TO_RECV) {
 345                 /*
 346                 lbs_deb_usbd(&cardp->udev->dev, "There is data to follow\n");
 347                 lbs_deb_usbd(&cardp->udev->dev,
 348                             "seqnum = %d totalbytes = %d\n", cardp->fwseqnum,
 349                             cardp->totalbytes);
 350                 */
 351                 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
 352                 usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
 353
 354         } else if (fwdata->fwheader.dnldcmd == FW_HAS_LAST_BLOCK) {
 355                 /*
 356                 lbs_deb_usbd(&cardp->udev->dev,
 357                             "Host has finished FW downloading\n");
 358                 lbs_deb_usbd(&cardp->udev->dev,
 359                             "Donwloading FW JUMP BLOCK\n");
 360                 */
 361                 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
 362                 usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
 363                 cardp->fwfinalblk = 1;
 364         }
 365
 366         /*
 367         lbs_deb_usbd(&cardp->udev->dev,
 368                     "The firmware download is done size is %d\n",
 369                     cardp->totalbytes);
 370         */
 371
 372         kfree(fwdata);
 373
 374         return 0;
 375 }
 376
 377 static int libertas_do_reset(wlan_private *priv)
 378 {
 379         int ret;
 380         struct usb_card_rec *cardp = priv->wlan_dev.card;
 381
 382         lbs_deb_enter(LBS_DEB_USB);
 383
 384         ret = usb_reset_device(cardp->udev);
 385         if (!ret) {
 386                 msleep(10);
 387                 reset_device(priv);
 388                 msleep(10);
 389         }
 390
 391         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 392
 393         return ret;
 394 }
 395
 396 /**
 397  *  @brief This function transfer the data to the device.
 398  *  @param priv         pointer to wlan_private
 399  *  @param payload      pointer to payload data
 400  *  @param nb           data length
 401  *  @return             0 or -1
 402  */
 403 int usb_tx_block(wlan_private * priv, u8 * payload, u16 nb)
 404 {
 405         /* pointer to card structure */
 406         struct usb_card_rec *cardp = priv->wlan_dev.card;
 407         int ret = -1;
 408
 409         /* check if device is removed */
 410         if (priv->adapter->surpriseremoved) {
 411                 lbs_deb_usbd(&cardp->udev->dev, "Device removed\n");
 412                 goto tx_ret;
 413         }
 414
 415         usb_fill_bulk_urb(cardp->tx_urb, cardp->udev,
 416                           usb_sndbulkpipe(cardp->udev,
 417                                           cardp->bulk_out_endpointAddr),
 418                           payload, nb, if_usb_write_bulk_callback, priv);
 419
 420         cardp->tx_urb->transfer_flags |= URB_ZERO_PACKET;
 421
 422         if ((ret = usb_submit_urb(cardp->tx_urb, GFP_ATOMIC))) {
 423                 /*  transfer failed */
 424                 lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb failed\n");
 425                 ret = -1;
 426         } else {
 427                 /* lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb success\n"); */
 428                 ret = 0;
 429         }
 430
 431 tx_ret:
 432         return ret;
 433 }
 434
 435 static int __if_usb_submit_rx_urb(wlan_private * priv,
 436                                   void (*callbackfn)
 437                                   (struct urb *urb))
 438 {
 439         struct usb_card_rec *cardp = priv->wlan_dev.card;
 440         struct sk_buff *skb;
 441         struct read_cb_info *rinfo = &cardp->rinfo;
 442         int ret = -1;
 443
 444         if (!(skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE))) {
 445                 lbs_pr_err("No free skb\n");
 446                 goto rx_ret;
 447         }
 448
 449         rinfo->skb = skb;
 450
 451         /* Fill the receive configuration URB and initialise the Rx call back */
 452         usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
 453                           usb_rcvbulkpipe(cardp->udev,
 454                                           cardp->bulk_in_endpointAddr),
 455                           (void *) (skb->tail + (size_t) IPFIELD_ALIGN_OFFSET),
 456                           MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn,
 457                           rinfo);
 458
 459         cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;
 460
 461         /* lbs_deb_usbd(&cardp->udev->dev, "Pointer for rx_urb %p\n", cardp->rx_urb); */
 462         if ((ret = usb_submit_urb(cardp->rx_urb, GFP_ATOMIC))) {
 463                 /* handle failure conditions */
 464                 lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB failed\n");
 465                 ret = -1;
 466         } else {
 467                 /* lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB success\n"); */
 468                 ret = 0;
 469         }
 470
 471 rx_ret:
 472         return ret;
 473 }
 474
 475 static inline int if_usb_submit_rx_urb_fwload(wlan_private * priv)
 476 {
 477         return __if_usb_submit_rx_urb(priv, &if_usb_receive_fwload);
 478 }
 479
 480 static inline int if_usb_submit_rx_urb(wlan_private * priv)
 481 {
 482         return __if_usb_submit_rx_urb(priv, &if_usb_receive);
 483 }
 484
 485 static void if_usb_receive_fwload(struct urb *urb)
 486 {
 487         struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
 488         wlan_private *priv = rinfo->priv;
 489         struct sk_buff *skb = rinfo->skb;
 490         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
 491         struct fwsyncheader *syncfwheader;
 492         struct bootcmdrespStr bootcmdresp;
 493
 494         if (urb->status) {
 495                 lbs_deb_usbd(&cardp->udev->dev,
 496                             "URB status is failed during fw load\n");
 497                 kfree_skb(skb);
 498                 return;
 499         }
 500
 501         if (cardp->bootcmdresp == 0) {
 502                 memcpy (&bootcmdresp, skb->data + IPFIELD_ALIGN_OFFSET,
 503                         sizeof(bootcmdresp));
 504                 if (cardp->udev->descriptor.bcdDevice < 0x3106) {
 505                         kfree_skb(skb);
 506                         if_usb_submit_rx_urb_fwload(priv);
 507                         cardp->bootcmdresp = 1;
 508                         lbs_deb_usbd(&cardp->udev->dev,
 509                                     "Received valid boot command response\n");
 510                         return;
 511                 }
 512                 if (bootcmdresp.u32magicnumber != BOOT_CMD_MAGIC_NUMBER) {
 513                         lbs_pr_info(
 514                                 "boot cmd response wrong magic number (0x%x)\n",
 515                                 bootcmdresp.u32magicnumber);
 516                 } else if (bootcmdresp.u8cmd_tag != BOOT_CMD_FW_BY_USB) {
 517                         lbs_pr_info(
 518                                 "boot cmd response cmd_tag error (%d)\n",
 519                                 bootcmdresp.u8cmd_tag);
 520                 } else if (bootcmdresp.u8result != BOOT_CMD_RESP_OK) {
 521                         lbs_pr_info(
 522                                 "boot cmd response result error (%d)\n",
 523                                 bootcmdresp.u8result);
 524                 } else {
 525                         cardp->bootcmdresp = 1;
 526                         lbs_deb_usbd(&cardp->udev->dev,
 527                                     "Received valid boot command response\n");
 528                 }
 529                 kfree_skb(skb);
 530                 if_usb_submit_rx_urb_fwload(priv);
 531                 return;
 532         }
 533
 534         syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
 535         if (!syncfwheader) {
 536                 lbs_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
 537                 kfree_skb(skb);
 538                 return;
 539         }
 540
 541         memcpy(syncfwheader, skb->data + IPFIELD_ALIGN_OFFSET,
 542                         sizeof(struct fwsyncheader));
 543
 544         if (!syncfwheader->cmd) {
 545                 /*
 546                 lbs_deb_usbd(&cardp->udev->dev,
 547                             "FW received Blk with correct CRC\n");
 548                 lbs_deb_usbd(&cardp->udev->dev,
 549                             "FW received Blk seqnum = %d\n",
 550                        syncfwheader->seqnum);
 551                 */
 552                 cardp->CRC_OK = 1;
 553         } else {
 554                 lbs_deb_usbd(&cardp->udev->dev,
 555                             "FW received Blk with CRC error\n");
 556                 cardp->CRC_OK = 0;
 557         }
 558
 559         kfree_skb(skb);
 560
 561         if (cardp->fwfinalblk) {
 562                 cardp->fwdnldover = 1;
 563                 goto exit;
 564         }
 565
 566         if_prog_firmware(priv);
 567
 568         if_usb_submit_rx_urb_fwload(priv);
 569 exit:
 570         kfree(syncfwheader);
 571
 572         return;
 573
 574 }
 575
 576 #define MRVDRV_MIN_PKT_LEN      30
 577
 578 static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
 579                                        struct usb_card_rec *cardp,
 580                                        wlan_private *priv)
 581 {
 582         if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE +
 583             MESSAGE_HEADER_LEN || recvlength < MRVDRV_MIN_PKT_LEN) {
 584                 lbs_deb_usbd(&cardp->udev->dev,
 585                             "Packet length is Invalid\n");
 586                 kfree_skb(skb);
 587                 return;
 588         }
 589
 590         skb_reserve(skb, IPFIELD_ALIGN_OFFSET);
 591         skb_put(skb, recvlength);
 592         skb_pull(skb, MESSAGE_HEADER_LEN);
 593         libertas_process_rxed_packet(priv, skb);
 594         priv->wlan_dev.upld_len = (recvlength - MESSAGE_HEADER_LEN);
 595 }
 596
 597 static inline void process_cmdrequest(int recvlength, u8 *recvbuff,
 598                                       struct sk_buff *skb,
 599                                       struct usb_card_rec *cardp,
 600                                       wlan_private *priv)
 601 {
 602         u8 *cmdbuf;
 603         if (recvlength > MRVDRV_SIZE_OF_CMD_BUFFER) {
 604                 lbs_deb_usbd(&cardp->udev->dev,
 605                             "The receive buffer is too large\n");
 606                 kfree_skb(skb);
 607                 return;
 608         }
 609
 610         if (!in_interrupt())
 611                 BUG();
 612
 613         spin_lock(&priv->adapter->driver_lock);
 614         /* take care of cur_cmd = NULL case by reading the
 615          * data to clear the interrupt */
 616         if (!priv->adapter->cur_cmd) {
 617                 cmdbuf = priv->wlan_dev.upld_buf;
 618                 priv->adapter->hisregcpy &= ~his_cmdupldrdy;
 619         } else
 620                 cmdbuf = priv->adapter->cur_cmd->bufvirtualaddr;
 621
 622         cardp->usb_int_cause |= his_cmdupldrdy;
 623         priv->wlan_dev.upld_len = (recvlength - MESSAGE_HEADER_LEN);
 624         memcpy(cmdbuf, recvbuff + MESSAGE_HEADER_LEN,
 625                priv->wlan_dev.upld_len);
 626
 627         kfree_skb(skb);
 628         libertas_interrupt(priv->wlan_dev.netdev);
 629         spin_unlock(&priv->adapter->driver_lock);
 630
 631         lbs_deb_usbd(&cardp->udev->dev,
 632                     "Wake up main thread to handle cmd response\n");
 633
 634         return;
 635 }
 636
 637 /**
 638  *  @brief This function reads of the packet into the upload buff,
 639  *  wake up the main thread and initialise the Rx callack.
 640  *
 641  *  @param urb          pointer to struct urb
 642  *  @return             N/A
 643  */
 644 static void if_usb_receive(struct urb *urb)
 645 {
 646         struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
 647         wlan_private *priv = rinfo->priv;
 648         struct sk_buff *skb = rinfo->skb;
 649         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
 650
 651         int recvlength = urb->actual_length;
 652         u8 *recvbuff = NULL;
 653         u32 recvtype;
 654
 655         lbs_deb_enter(LBS_DEB_USB);
 656
 657         if (recvlength) {
 658                 if (urb->status) {
 659                         lbs_deb_usbd(&cardp->udev->dev,
 660                                     "URB status is failed\n");
 661                         kfree_skb(skb);
 662                         goto setup_for_next;
 663                 }
 664
 665                 recvbuff = skb->data + IPFIELD_ALIGN_OFFSET;
 666                 memcpy(&recvtype, recvbuff, sizeof(u32));
 667                 lbs_deb_usbd(&cardp->udev->dev,
 668                             "Recv length = 0x%x\n", recvlength);
 669                 lbs_deb_usbd(&cardp->udev->dev,
 670                             "Receive type = 0x%X\n", recvtype);
 671                 recvtype = le32_to_cpu(recvtype);
 672                 lbs_deb_usbd(&cardp->udev->dev,
 673                             "Receive type after = 0x%X\n", recvtype);
 674         } else if (urb->status)
 675                 goto rx_exit;
 676
 677
 678         switch (recvtype) {
 679         case CMD_TYPE_DATA:
 680                 process_cmdtypedata(recvlength, skb, cardp, priv);
 681                 break;
 682
 683         case CMD_TYPE_REQUEST:
 684                 process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
 685                 break;
 686
 687         case CMD_TYPE_INDICATION:
 688                 /* Event cause handling */
 689                 spin_lock(&priv->adapter->driver_lock);
 690                 cardp->usb_event_cause = *(u32 *) (recvbuff + MESSAGE_HEADER_LEN);
 691                 lbs_deb_usbd(&cardp->udev->dev,"**EVENT** 0x%X\n",
 692                             cardp->usb_event_cause);
 693                 if (cardp->usb_event_cause & 0xffff0000) {
 694                         libertas_send_tx_feedback(priv);
 695                         spin_unlock(&priv->adapter->driver_lock);
 696                         break;
 697                 }
 698                 cardp->usb_event_cause = le32_to_cpu(cardp->usb_event_cause) << 3;
 699                 cardp->usb_int_cause |= his_cardevent;
 700                 kfree_skb(skb);
 701                 libertas_interrupt(priv->wlan_dev.netdev);
 702                 spin_unlock(&priv->adapter->driver_lock);
 703                 goto rx_exit;
 704         default:
 705                 kfree_skb(skb);
 706                 break;
 707         }
 708
 709 setup_for_next:
 710         if_usb_submit_rx_urb(priv);
 711 rx_exit:
 712         lbs_deb_leave(LBS_DEB_USB);
 713 }
 714
 715 /**
 716  *  @brief This function downloads data to FW
 717  *  @param priv         pointer to wlan_private structure
 718  *  @param type         type of data
 719  *  @param buf          pointer to data buffer
 720  *  @param len          number of bytes
 721  *  @return             0 or -1
 722  */
 723 static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb)
 724 {
 725         int ret = -1;
 726         u32 tmp;
 727         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
 728
 729         lbs_deb_usbd(&cardp->udev->dev,"*** type = %u\n", type);
 730         lbs_deb_usbd(&cardp->udev->dev,"size after = %d\n", nb);
 731
 732         if (type == MVMS_CMD) {
 733                 tmp = cpu_to_le32(CMD_TYPE_REQUEST);
 734                 priv->wlan_dev.dnld_sent = DNLD_CMD_SENT;
 735                 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
 736                        MESSAGE_HEADER_LEN);
 737
 738         } else {
 739                 tmp = cpu_to_le32(CMD_TYPE_DATA);
 740                 priv->wlan_dev.dnld_sent = DNLD_DATA_SENT;
 741                 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
 742                        MESSAGE_HEADER_LEN);
 743         }
 744
 745         memcpy((cardp->bulk_out_buffer + MESSAGE_HEADER_LEN), payload, nb);
 746
 747         ret =
 748             usb_tx_block(priv, cardp->bulk_out_buffer, nb + MESSAGE_HEADER_LEN);
 749
 750         return ret;
 751 }
 752
 753 /* called with adapter->driver_lock held */
 754 static int if_usb_get_int_status(wlan_private * priv, u8 * ireg)
 755 {
 756         struct usb_card_rec *cardp = priv->wlan_dev.card;
 757
 758         *ireg = cardp->usb_int_cause;
 759         cardp->usb_int_cause = 0;
 760
 761         lbs_deb_usbd(&cardp->udev->dev,"Int cause is 0x%X\n", *ireg);
 762
 763         return 0;
 764 }
 765
 766 static int if_usb_read_event_cause(wlan_private * priv)
 767 {
 768         struct usb_card_rec *cardp = priv->wlan_dev.card;
 769         priv->adapter->eventcause = cardp->usb_event_cause;
 770         /* Re-submit rx urb here to avoid event lost issue */
 771         if_usb_submit_rx_urb(priv);
 772         return 0;
 773 }
 774
 775 static int reset_device(wlan_private *priv)
 776 {
 777         int ret;
 778
 779         lbs_deb_enter(LBS_DEB_USB);
 780         ret = libertas_prepare_and_send_command(priv, cmd_802_11_reset,
 781                                     cmd_act_halt, 0, 0, NULL);
 782         msleep_interruptible(10);
 783
 784         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 785         return ret;
 786 }
 787
 788 static int if_usb_unregister_dev(wlan_private * priv)
 789 {
 790         int ret = 0;
 791
 792         /* Need to send a Reset command to device before USB resources freed
 793          * and wlan_remove_card() called, then device can handle FW download
 794          * again.
 795          */
 796         if (priv)
 797                 reset_device(priv);
 798
 799         return ret;
 800 }
 801
 802
 803 /**
 804  *  @brief  This function register usb device and initialize parameter
 805  *  @param              priv pointer to wlan_private
 806  *  @return             0 or -1
 807  */
 808 static int if_usb_register_dev(wlan_private * priv)
 809 {
 810         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
 811
 812         lbs_deb_enter(LBS_DEB_USB);
 813
 814         cardp->priv = priv;
 815         cardp->eth_dev = priv->wlan_dev.netdev;
 816         priv->hotplug_device = &(cardp->udev->dev);
 817
 818         SET_NETDEV_DEV(cardp->eth_dev, &(cardp->udev->dev));
 819         SET_NETDEV_DEV(priv->mesh_dev, &(cardp->udev->dev));
 820
 821         lbs_deb_usbd(&cardp->udev->dev, "udev pointer is at %p\n",
 822                     cardp->udev);
 823
 824         lbs_deb_leave(LBS_DEB_USB);
 825         return 0;
 826 }
 827
 828
 829
 830 static int if_usb_prog_firmware(wlan_private * priv)
 831 {
 832         struct usb_card_rec *cardp = priv->wlan_dev.card;
 833         int i = 0;
 834         static int reset_count = 10;
 835         int ret = 0;
 836
 837         lbs_deb_enter(LBS_DEB_USB);
 838
 839         cardp->rinfo.priv = priv;
 840
 841 restart:
 842         if (if_usb_submit_rx_urb_fwload(priv) < 0) {
 843                 lbs_deb_usbd(&cardp->udev->dev, "URB submission is failed\n");
 844                 ret = -1;
 845                 goto done;
 846         }
 847
 848         cardp->bootcmdresp = 0;
 849         do {
 850                 int j = 0;
 851                 i++;
 852                 /* Issue Boot command = 1, Boot from Download-FW */
 853                 if_usb_issue_boot_command(priv, BOOT_CMD_FW_BY_USB);
 854                 /* wait for command response */
 855                 do {
 856                         j++;
 857                         msleep_interruptible(100);
 858                 } while (cardp->bootcmdresp == 0 && j < 10);
 859         } while (cardp->bootcmdresp == 0 && i < 5);
 860
 861         if (cardp->bootcmdresp == 0) {
 862                 if (--reset_count >= 0) {
 863                         libertas_do_reset(priv);
 864                         goto restart;
 865                 }
 866                 return -1;
 867         }
 868
 869         i = 0;
 870         priv->adapter->fw_ready = 0;
 871
 872         cardp->totalbytes = 0;
 873         cardp->fwlastblksent = 0;
 874         cardp->CRC_OK = 1;
 875         cardp->fwdnldover = 0;
 876         cardp->fwseqnum = -1;
 877         cardp->totalbytes = 0;
 878         cardp->fwfinalblk = 0;
 879
 880         if_prog_firmware(priv);
 881
 882         do {
 883                 lbs_deb_usbd(&cardp->udev->dev,"Wlan sched timeout\n");
 884                 i++;
 885                 msleep_interruptible(100);
 886                 if (priv->adapter->surpriseremoved || i >= 20)
 887                         break;
 888         } while (!cardp->fwdnldover);
 889
 890         if (!cardp->fwdnldover) {
 891                 lbs_pr_info("failed to load fw, resetting device!\n");
 892                 if (--reset_count >= 0) {
 893                         libertas_do_reset(priv);
 894                         goto restart;
 895                 }
 896
 897                 lbs_pr_info("FW download failure, time = %d ms\n", i * 100);
 898                 ret = -1;
 899                 goto done;
 900         }
 901
 902         if_usb_submit_rx_urb(priv);
 903
 904         /* Delay 200 ms to waiting for the FW ready */
 905         msleep_interruptible(200);
 906
 907         priv->adapter->fw_ready = 1;
 908
 909 done:
 910         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
 911         return ret;
 912 }
 913
 914 #ifdef CONFIG_PM
 915 static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)
 916 {
 917         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 918         wlan_private *priv = cardp->priv;
 919
 920         lbs_deb_enter(LBS_DEB_USB);
 921
 922         if (priv->adapter->psstate != PS_STATE_FULL_POWER)
 923                 return -1;
 924
 925         netif_device_detach(cardp->eth_dev);
 926         netif_device_detach(priv->mesh_dev);
 927
 928         /* Unlink tx & rx urb */
 929         usb_kill_urb(cardp->tx_urb);
 930         usb_kill_urb(cardp->rx_urb);
 931
 932         cardp->rx_urb_recall = 1;
 933
 934         lbs_deb_leave(LBS_DEB_USB);
 935         return 0;
 936 }
 937
 938 static int if_usb_resume(struct usb_interface *intf)
 939 {
 940         struct usb_card_rec *cardp = usb_get_intfdata(intf);
 941         wlan_private *priv = cardp->priv;
 942
 943         lbs_deb_enter(LBS_DEB_USB);
 944
 945         cardp->rx_urb_recall = 0;
 946
 947         if_usb_submit_rx_urb(cardp->priv);
 948
 949         netif_device_attach(cardp->eth_dev);
 950         netif_device_attach(priv->mesh_dev);
 951
 952         lbs_deb_leave(LBS_DEB_USB);
 953         return 0;
 954 }
 955 #else
 956 #define if_usb_suspend NULL
 957 #define if_usb_resume NULL
 958 #endif
 959
 960 static struct usb_driver if_usb_driver = {
 961         /* driver name */
 962         .name = usbdriver_name,
 963         /* probe function name */
 964         .probe = if_usb_probe,
 965         /* disconnect function  name */
 966         .disconnect = if_usb_disconnect,
 967         /* device signature table */
 968         .id_table = if_usb_table,
 969         .suspend = if_usb_suspend,
 970         .resume = if_usb_resume,
 971 };
 972
 973 static int if_usb_init_module(void)
 974 {
 975         int ret = 0;
 976
 977         lbs_deb_enter(LBS_DEB_MAIN);
 978
 979         if (libertas_fw_name == NULL) {
 980                 libertas_fw_name = default_fw_name;
 981         }
 982
 983         ret = usb_register(&if_usb_driver);
 984
 985         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
 986         return ret;
 987 }
 988
 989 static void if_usb_exit_module(void)
 990 {
 991         int i;
 992
 993         lbs_deb_enter(LBS_DEB_MAIN);
 994
 995         for (i = 0; i<libertas_found; i++) {
 996                 wlan_private *priv = libertas_devs[i]->priv;
 997                 reset_device(priv);
 998         }
 999
1000         /* API unregisters the driver from USB subsystem */
1001         usb_deregister(&if_usb_driver);
1002
1003         lbs_deb_leave(LBS_DEB_MAIN);
1004 }
1005
1006 module_init(if_usb_init_module);
1007 module_exit(if_usb_exit_module);
1008
1009 MODULE_DESCRIPTION("8388 USB WLAN Driver");
1010 MODULE_AUTHOR("Marvell International Ltd.");
1011 MODULE_LICENSE("GPL");