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