drivers/bluetooth/btmrvl_main.c

   1 /**
   2  * Marvell Bluetooth driver
   3  *
   4  * Copyright (C) 2009, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  *
  15  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  18  * this warranty disclaimer.
  19  **/
  20
  21 #include <net/bluetooth/bluetooth.h>
  22 #include <net/bluetooth/hci_core.h>
  23
  24 #include "btmrvl_drv.h"
  25
  26 #define VERSION "1.0"
  27
  28 /*
  29  * This function is called by interface specific interrupt handler.
  30  * It updates Power Save & Host Sleep states, and wakes up the main
  31  * thread.
  32  */
  33 void btmrvl_interrupt(struct btmrvl_private *priv)
  34 {
  35         BT_DBG("Enter");
  36
  37         priv->adapter->ps_state = PS_AWAKE;
  38
  39         priv->adapter->wakeup_tries = 0;
  40
  41         priv->adapter->int_count++;
  42
  43         wake_up_interruptible(&priv->main_thread.wait_q);
  44
  45         BT_DBG("Leave");
  46 }
  47 EXPORT_SYMBOL_GPL(btmrvl_interrupt);
  48
  49 void btmrvl_check_evtpkt(struct btmrvl_private *priv, struct sk_buff *skb)
  50 {
  51         struct hci_event_hdr *hdr = (struct hci_event_hdr *)skb->data;
  52         struct hci_ev_cmd_complete *ec;
  53         u16 opcode, ocf;
  54
  55         BT_DBG("Enter");
  56
  57         if (hdr->evt == HCI_EV_CMD_COMPLETE) {
  58                 ec = (struct hci_ev_cmd_complete *)(skb->data +
  59                                                     HCI_EVENT_HDR_SIZE);
  60                 opcode = __le16_to_cpu(ec->opcode);
  61                 ocf = hci_opcode_ocf(opcode);
  62                 if ((ocf == BT_CMD_MODULE_CFG_REQ) &&
  63                     (priv->btmrvl_dev.sendcmdflag)) {
  64                         priv->btmrvl_dev.sendcmdflag = false;
  65                         priv->adapter->cmd_complete = true;
  66                         wake_up_interruptible(&priv->adapter->cmd_wait_q);
  67                 }
  68         }
  69
  70         BT_DBG("Leave");
  71 }
  72 EXPORT_SYMBOL_GPL(btmrvl_check_evtpkt);
  73
  74 int btmrvl_process_event(struct btmrvl_private *priv, struct sk_buff *skb)
  75 {
  76         struct btmrvl_adapter *adapter = priv->adapter;
  77         u8 ret = 0;
  78         struct btmrvl_event *event;
  79
  80         BT_DBG("Enter");
  81
  82         event = (struct btmrvl_event *) skb->data;
  83         if (event->ec != 0xff) {
  84                 BT_DBG("Not Marvell Event=%x", event->ec);
  85                 ret = -EINVAL;
  86                 goto exit;
  87         }
  88
  89         switch (event->data[0]) {
  90         case BT_CMD_AUTO_SLEEP_MODE:
  91                 if (!event->data[2]) {
  92                         if (event->data[1] == BT_PS_ENABLE)
  93                                 adapter->psmode = 1;
  94                         else
  95                                 adapter->psmode = 0;
  96                         BT_DBG("PS Mode:%s",
  97                                 (adapter->psmode) ? "Enable" : "Disable");
  98                 } else {
  99                         BT_DBG("PS Mode command failed");
 100                 }
 101                 break;
 102
 103         case BT_CMD_HOST_SLEEP_CONFIG:
 104                 if (!event->data[3])
 105                         BT_DBG("gpio=%x, gap=%x", event->data[1],
 106                                 event->data[2]);
 107                 else
 108                         BT_DBG("HSCFG command failed");
 109                 break;
 110
 111         case BT_CMD_HOST_SLEEP_ENABLE:
 112                 if (!event->data[1]) {
 113                         adapter->hs_state = HS_ACTIVATED;
 114                         if (adapter->psmode)
 115                                 adapter->ps_state = PS_SLEEP;
 116                         wake_up_interruptible(&adapter->cmd_wait_q);
 117                         BT_DBG("HS ACTIVATED!");
 118                 } else {
 119                         BT_DBG("HS Enable failed");
 120                 }
 121                 break;
 122
 123         case BT_CMD_MODULE_CFG_REQ:
 124                 if ((priv->btmrvl_dev.sendcmdflag) &&
 125                         (event->data[1] == MODULE_BRINGUP_REQ)) {
 126                         BT_DBG("EVENT:%s", (event->data[2]) ?
 127                                 "Bring-up failed" : "Bring-up succeed");
 128                 } else if ((priv->btmrvl_dev.sendcmdflag) &&
 129                         (event->data[1] == MODULE_SHUTDOWN_REQ)) {
 130                         BT_DBG("EVENT:%s", (event->data[2]) ?
 131                                 "Shutdown failed" : "Shutdown succeed");
 132                 } else {
 133                         BT_DBG("BT_CMD_MODULE_CFG_REQ resp for APP");
 134                         ret = -EINVAL;
 135                 }
 136                 break;
 137
 138         case BT_EVENT_POWER_STATE:
 139                 if (event->data[1] == BT_PS_SLEEP)
 140                         adapter->ps_state = PS_SLEEP;
 141                 BT_DBG("EVENT:%s",
 142                         (adapter->ps_state) ? "PS_SLEEP" : "PS_AWAKE");
 143                 break;
 144
 145         default:
 146                 BT_DBG("Unknown Event=%d", event->data[0]);
 147                 ret = -EINVAL;
 148                 break;
 149         }
 150
 151 exit:
 152         if (!ret)
 153                 kfree_skb(skb);
 154
 155         BT_DBG("Leave");
 156
 157         return ret;
 158 }
 159 EXPORT_SYMBOL_GPL(btmrvl_process_event);
 160
 161 int btmrvl_send_module_cfg_cmd(struct btmrvl_private *priv, int subcmd)
 162 {
 163         struct sk_buff *skb = NULL;
 164         u8 ret = 0;
 165         struct btmrvl_cmd *cmd;
 166
 167         BT_DBG("Enter");
 168
 169         skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
 170         if (skb == NULL) {
 171                 BT_ERR("No free skb");
 172                 ret = -ENOMEM;
 173                 goto exit;
 174         }
 175
 176         cmd = (struct btmrvl_cmd *) skb->tail;
 177         cmd->ocf_ogf = cpu_to_le16((OGF << 10) | BT_CMD_MODULE_CFG_REQ);
 178         cmd->length = 1;
 179         cmd->data[0] = subcmd;
 180
 181         bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
 182
 183         skb_put(skb, sizeof(*cmd));
 184         skb->dev = (void *)priv->btmrvl_dev.hcidev;
 185         skb_queue_head(&priv->adapter->tx_queue, skb);
 186
 187         priv->btmrvl_dev.sendcmdflag = true;
 188
 189         priv->adapter->cmd_complete = false;
 190
 191         BT_DBG("Queue module cfg Command");
 192
 193         wake_up_interruptible(&priv->main_thread.wait_q);
 194
 195         if (!wait_event_interruptible_timeout(
 196                         priv->adapter->cmd_wait_q,
 197                         priv->adapter->cmd_complete,
 198                         msecs_to_jiffies(WAIT_UNTIL_CMD_RESP))) {
 199                 ret = -ETIMEDOUT;
 200                 BT_ERR("module_cfg_cmd(%x): timeout: %d",
 201                         subcmd, priv->btmrvl_dev.sendcmdflag);
 202         }
 203
 204         BT_DBG("module cfg Command done");
 205
 206 exit:
 207         BT_DBG("Leave");
 208
 209         return ret;
 210 }
 211 EXPORT_SYMBOL_GPL(btmrvl_send_module_cfg_cmd);
 212
 213 static int btmrvl_enable_hs(struct btmrvl_private *priv)
 214 {
 215         struct sk_buff *skb = NULL;
 216         u8 ret = 0;
 217         struct btmrvl_cmd *cmd;
 218
 219         BT_DBG("Enter");
 220
 221         skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
 222         if (skb == NULL) {
 223                 BT_ERR("No free skb");
 224                 ret = -ENOMEM;
 225                 goto exit;
 226         }
 227
 228         cmd = (struct btmrvl_cmd *) skb->tail;
 229         cmd->ocf_ogf = cpu_to_le16((OGF << 10) | BT_CMD_HOST_SLEEP_ENABLE);
 230         cmd->length = 0;
 231
 232         bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
 233
 234         skb_put(skb, sizeof(*cmd));
 235         skb->dev = (void *)priv->btmrvl_dev.hcidev;
 236         skb_queue_head(&priv->adapter->tx_queue, skb);
 237
 238         BT_DBG("Queue hs enable Command");
 239
 240         wake_up_interruptible(&priv->main_thread.wait_q);
 241
 242         if (!wait_event_interruptible_timeout(
 243                         priv->adapter->cmd_wait_q,
 244                         priv->adapter->hs_state,
 245                         msecs_to_jiffies(WAIT_UNTIL_HS_STATE_CHANGED))) {
 246                 ret = -ETIMEDOUT;
 247                 BT_ERR("timeout: %d, %d,%d",
 248                         priv->adapter->hs_state,
 249                         priv->adapter->ps_state,
 250                         priv->adapter->wakeup_tries);
 251         }
 252
 253 exit:
 254         BT_DBG("Leave");
 255
 256         return ret;
 257 }
 258
 259 int btmrvl_prepare_command(struct btmrvl_private *priv)
 260 {
 261         struct sk_buff *skb = NULL;
 262         u8 ret = 0;
 263         struct btmrvl_cmd *cmd;
 264
 265         BT_DBG("Enter");
 266
 267         if (priv->btmrvl_dev.hscfgcmd) {
 268                 priv->btmrvl_dev.hscfgcmd = 0;
 269
 270                 skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
 271                 if (skb == NULL) {
 272                         BT_ERR("No free skb");
 273                         ret = -ENOMEM;
 274                         goto exit;
 275                 }
 276
 277                 cmd = (struct btmrvl_cmd *) skb->tail;
 278                 cmd->ocf_ogf = cpu_to_le16((OGF << 10) |
 279                                                 BT_CMD_HOST_SLEEP_CONFIG);
 280                 cmd->length = 2;
 281                 cmd->data[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
 282                 cmd->data[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff);
 283
 284                 bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
 285
 286                 skb_put(skb, sizeof(*cmd));
 287                 skb->dev = (void *)priv->btmrvl_dev.hcidev;
 288                 skb_queue_head(&priv->adapter->tx_queue, skb);
 289
 290                 BT_DBG("Queue HSCFG Command, gpio=0x%x, gap=0x%x",
 291                        cmd->data[0], cmd->data[1]);
 292         }
 293
 294         if (priv->btmrvl_dev.pscmd) {
 295                 priv->btmrvl_dev.pscmd = 0;
 296
 297                 skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
 298                 if (skb == NULL) {
 299                         BT_ERR("No free skb");
 300                         ret = -ENOMEM;
 301                         goto exit;
 302                 }
 303
 304                 cmd = (struct btmrvl_cmd *) skb->tail;
 305                 cmd->ocf_ogf = cpu_to_le16((OGF << 10) |
 306                                                 BT_CMD_AUTO_SLEEP_MODE);
 307                 cmd->length = 1;
 308
 309                 if (priv->btmrvl_dev.psmode)
 310                         cmd->data[0] = BT_PS_ENABLE;
 311                 else
 312                         cmd->data[0] = BT_PS_DISABLE;
 313
 314                 bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
 315
 316                 skb_put(skb, sizeof(*cmd));
 317                 skb->dev = (void *)priv->btmrvl_dev.hcidev;
 318                 skb_queue_head(&priv->adapter->tx_queue, skb);
 319
 320                 BT_DBG("Queue PSMODE Command:%d", cmd->data[0]);
 321         }
 322
 323         if (priv->btmrvl_dev.hscmd) {
 324                 priv->btmrvl_dev.hscmd = 0;
 325
 326                 if (priv->btmrvl_dev.hsmode) {
 327                         ret = btmrvl_enable_hs(priv);
 328                 } else {
 329                         ret = priv->hw_wakeup_firmware(priv);
 330                         priv->adapter->hs_state = HS_DEACTIVATED;
 331                 }
 332         }
 333
 334 exit:
 335         BT_DBG("Leave");
 336
 337         return ret;
 338 }
 339
 340 static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb)
 341 {
 342         u8 ret = 0;
 343
 344         BT_DBG("Enter");
 345
 346         if (!skb || !skb->data) {
 347                 BT_DBG("Leave");
 348                 return -EINVAL;
 349         }
 350
 351         if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) {
 352                 BT_ERR("Tx Error: Bad skb length %d : %d",
 353                         skb->len, BTM_UPLD_SIZE);
 354                 BT_DBG("Leave");
 355                 return -EINVAL;
 356         }
 357
 358         if (skb_headroom(skb) < BTM_HEADER_LEN) {
 359                 struct sk_buff *tmp = skb;
 360
 361                 skb = skb_realloc_headroom(skb, BTM_HEADER_LEN);
 362                 if (!skb) {
 363                         BT_ERR("Tx Error: realloc_headroom failed %d",
 364                                 BTM_HEADER_LEN);
 365                         skb = tmp;
 366                         BT_DBG("Leave");
 367                         return -EINVAL;
 368                 }
 369
 370                 kfree_skb(tmp);
 371         }
 372
 373         skb_push(skb, BTM_HEADER_LEN);
 374
 375         /* header type: byte[3]
 376          * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor
 377          * header length: byte[2][1][0]
 378          */
 379
 380         skb->data[0] = (skb->len & 0x0000ff);
 381         skb->data[1] = (skb->len & 0x00ff00) >> 8;
 382         skb->data[2] = (skb->len & 0xff0000) >> 16;
 383         skb->data[3] = bt_cb(skb)->pkt_type;
 384
 385         if (priv->hw_host_to_card)
 386                 ret = priv->hw_host_to_card(priv, skb->data, skb->len);
 387
 388         BT_DBG("Leave");
 389
 390         return ret;
 391 }
 392
 393 static void btmrvl_init_adapter(struct btmrvl_private *priv)
 394 {
 395         BT_DBG("Enter");
 396
 397         skb_queue_head_init(&priv->adapter->tx_queue);
 398
 399         priv->adapter->ps_state = PS_AWAKE;
 400
 401         init_waitqueue_head(&priv->adapter->cmd_wait_q);
 402
 403         BT_DBG("Leave");
 404 }
 405
 406 static void btmrvl_free_adapter(struct btmrvl_private *priv)
 407 {
 408         BT_DBG("Enter");
 409
 410         skb_queue_purge(&priv->adapter->tx_queue);
 411
 412         kfree(priv->adapter);
 413
 414         priv->adapter = NULL;
 415
 416         BT_DBG("Leave");
 417 }
 418
 419 static int
 420 btmrvl_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
 421 {
 422         BT_DBG("Enter");
 423
 424         BT_DBG("Leave");
 425
 426         return -ENOIOCTLCMD;
 427 }
 428
 429 static void btmrvl_destruct(struct hci_dev *hdev)
 430 {
 431         BT_DBG("Enter");
 432
 433         BT_DBG("Leave");
 434 }
 435
 436 static int btmrvl_send_frame(struct sk_buff *skb)
 437 {
 438         struct hci_dev *hdev = (struct hci_dev *)skb->dev;
 439         struct btmrvl_private *priv = NULL;
 440
 441         BT_DBG("Enter: type=%d, len=%d", skb->pkt_type, skb->len);
 442
 443         if (!hdev || !hdev->driver_data) {
 444                 BT_ERR("Frame for unknown HCI device");
 445                 BT_DBG("Leave");
 446                 return -ENODEV;
 447         }
 448
 449         priv = (struct btmrvl_private *)hdev->driver_data;
 450         if (!test_bit(HCI_RUNNING, &hdev->flags)) {
 451                 BT_ERR("Failed testing HCI_RUNING, flags=%lx", hdev->flags);
 452                 print_hex_dump_bytes("data: ", DUMP_PREFIX_OFFSET,
 453                                         skb->data, skb->len);
 454                 BT_DBG("Leave");
 455                 return -EBUSY;
 456         }
 457
 458         switch (bt_cb(skb)->pkt_type) {
 459         case HCI_COMMAND_PKT:
 460                 hdev->stat.cmd_tx++;
 461                 break;
 462
 463         case HCI_ACLDATA_PKT:
 464                 hdev->stat.acl_tx++;
 465                 break;
 466
 467         case HCI_SCODATA_PKT:
 468                 hdev->stat.sco_tx++;
 469                 break;
 470         }
 471
 472         skb_queue_tail(&priv->adapter->tx_queue, skb);
 473
 474         wake_up_interruptible(&priv->main_thread.wait_q);
 475
 476         BT_DBG("Leave");
 477
 478         return 0;
 479 }
 480
 481 static int btmrvl_flush(struct hci_dev *hdev)
 482 {
 483         struct btmrvl_private *priv =
 484                                 (struct btmrvl_private *) hdev->driver_data;
 485
 486         BT_DBG("Enter");
 487
 488         skb_queue_purge(&priv->adapter->tx_queue);
 489
 490         BT_DBG("Leave");
 491
 492         return 0;
 493 }
 494
 495 static int btmrvl_close(struct hci_dev *hdev)
 496 {
 497         struct btmrvl_private *priv =
 498                                 (struct btmrvl_private *) hdev->driver_data;
 499
 500         BT_DBG("Enter");
 501
 502         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags)) {
 503                 BT_DBG("Leave");
 504                 return 0;
 505         }
 506
 507         skb_queue_purge(&priv->adapter->tx_queue);
 508
 509         BT_DBG("Leave");
 510
 511         return 0;
 512 }
 513
 514 static int btmrvl_open(struct hci_dev *hdev)
 515 {
 516         BT_DBG("Enter");
 517
 518         set_bit(HCI_RUNNING, &hdev->flags);
 519
 520         BT_DBG("Leave");
 521
 522         return 0;
 523 }
 524
 525 /*
 526  * This function handles the event generated by firmware, rx data
 527  * received from firmware, and tx data sent from kernel.
 528  */
 529 static int btmrvl_service_main_thread(void *data)
 530 {
 531         struct btmrvl_thread *thread = data;
 532         struct btmrvl_private *priv = thread->priv;
 533         struct btmrvl_adapter *adapter = priv->adapter;
 534         wait_queue_t wait;
 535         struct sk_buff *skb;
 536         ulong flags;
 537
 538         BT_DBG("Enter");
 539
 540         init_waitqueue_entry(&wait, current);
 541
 542         current->flags |= PF_NOFREEZE;
 543
 544         for (;;) {
 545                 add_wait_queue(&thread->wait_q, &wait);
 546
 547                 set_current_state(TASK_INTERRUPTIBLE);
 548
 549                 if (adapter->wakeup_tries ||
 550                     ((!adapter->int_count) &&
 551                      (!priv->btmrvl_dev.tx_dnld_rdy ||
 552                       skb_queue_empty(&adapter->tx_queue)))) {
 553                         BT_DBG("main_thread is sleeping...");
 554                         schedule();
 555                 }
 556
 557                 set_current_state(TASK_RUNNING);
 558
 559                 remove_wait_queue(&thread->wait_q, &wait);
 560
 561                 BT_DBG("main_thread woke up");
 562
 563                 if (kthread_should_stop()) {
 564                         BT_DBG("main_thread: break from main thread");
 565                         break;
 566                 }
 567
 568                 spin_lock_irqsave(&priv->driver_lock, flags);
 569                 if (adapter->int_count) {
 570                         adapter->int_count = 0;
 571                 } else if ((adapter->ps_state == PS_SLEEP) &&
 572                            !skb_queue_empty(&adapter->tx_queue)) {
 573                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 574                         adapter->wakeup_tries++;
 575                         priv->hw_wakeup_firmware(priv);
 576                         continue;
 577                 }
 578                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 579
 580                 if (adapter->ps_state == PS_SLEEP)
 581                         continue;
 582
 583                 if (!priv->btmrvl_dev.tx_dnld_rdy)
 584                         continue;
 585
 586                 skb = skb_dequeue(&adapter->tx_queue);
 587                 if (skb) {
 588                         if (btmrvl_tx_pkt(priv, skb))
 589                                 priv->btmrvl_dev.hcidev->stat.err_tx++;
 590                         else
 591                                 priv->btmrvl_dev.hcidev->stat.byte_tx
 592                                         += skb->len;
 593
 594                         kfree_skb(skb);
 595                 }
 596         }
 597
 598         BT_DBG("Leave");
 599
 600         return 0;
 601 }
 602
 603 struct btmrvl_private *btmrvl_add_card(void *card)
 604 {
 605         struct hci_dev *hdev = NULL;
 606         struct btmrvl_private *priv = NULL;
 607         int ret;
 608
 609         BT_DBG("Enter");
 610
 611         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 612         if (!priv) {
 613                 BT_ERR("Can not allocate priv");
 614                 goto err_priv;
 615         }
 616
 617         priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL);
 618         if (!priv->adapter) {
 619                 BT_ERR("Allocate buffer for btmrvl_adapter failed!");
 620                 goto err_adapter;
 621         }
 622
 623         btmrvl_init_adapter(priv);
 624
 625         hdev = hci_alloc_dev();
 626         if (!hdev) {
 627                 BT_ERR("Can not allocate HCI device");
 628                 goto err_hdev;
 629         }
 630
 631         BT_DBG("Starting kthread...");
 632         priv->main_thread.priv = priv;
 633         spin_lock_init(&priv->driver_lock);
 634
 635         init_waitqueue_head(&priv->main_thread.wait_q);
 636         priv->main_thread.task = kthread_run(btmrvl_service_main_thread,
 637                 &priv->main_thread, "btmrvl_main_service");
 638
 639         priv->btmrvl_dev.hcidev = hdev;
 640         priv->btmrvl_dev.card = card;
 641
 642         hdev->driver_data = priv;
 643
 644         priv->btmrvl_dev.tx_dnld_rdy = true;
 645
 646         hdev->type = HCI_SDIO;
 647         hdev->open = btmrvl_open;
 648         hdev->close = btmrvl_close;
 649         hdev->flush = btmrvl_flush;
 650         hdev->send = btmrvl_send_frame;
 651         hdev->destruct = btmrvl_destruct;
 652         hdev->ioctl = btmrvl_ioctl;
 653         hdev->owner = THIS_MODULE;
 654
 655         ret = hci_register_dev(hdev);
 656         if (ret < 0) {
 657                 BT_ERR("Can not register HCI device");
 658                 goto err_hci_register_dev;
 659         }
 660
 661         BT_DBG("Leave");
 662         return priv;
 663
 664 err_hci_register_dev:
 665         /* Stop the thread servicing the interrupts */
 666         kthread_stop(priv->main_thread.task);
 667
 668         hci_free_dev(hdev);
 669
 670 err_hdev:
 671         btmrvl_free_adapter(priv);
 672
 673 err_adapter:
 674         kfree(priv);
 675
 676 err_priv:
 677         BT_DBG("Leave");
 678
 679         return NULL;
 680 }
 681 EXPORT_SYMBOL_GPL(btmrvl_add_card);
 682
 683 int btmrvl_remove_card(struct btmrvl_private *priv)
 684 {
 685         struct hci_dev *hdev;
 686
 687         BT_DBG("Enter");
 688
 689         hdev = priv->btmrvl_dev.hcidev;
 690
 691         wake_up_interruptible(&priv->adapter->cmd_wait_q);
 692
 693         kthread_stop(priv->main_thread.task);
 694
 695         hci_unregister_dev(hdev);
 696
 697         hci_free_dev(hdev);
 698
 699         priv->btmrvl_dev.hcidev = NULL;
 700
 701         btmrvl_free_adapter(priv);
 702
 703         kfree(priv);
 704
 705         BT_DBG("Leave");
 706
 707         return 0;
 708 }
 709 EXPORT_SYMBOL_GPL(btmrvl_remove_card);
 710
 711 MODULE_AUTHOR("Marvell International Ltd.");
 712 MODULE_DESCRIPTION("Marvell Bluetooth Driver v" VERSION);
 713 MODULE_VERSION(VERSION);
 714 MODULE_LICENSE("GPL v2");