drivers/net/wireless/libertas/if_usb.c

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