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