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