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 <linux/module.h>
  22
  23 #include <net/bluetooth/bluetooth.h>
  24 #include <net/bluetooth/hci_core.h>
  25
  26 #include "btmrvl_drv.h"
  27
  28 #define VERSION "1.0"
  29
  30 /*
  31  * This function is called by interface specific interrupt handler.
  32  * It updates Power Save & Host Sleep states, and wakes up the main
  33  * thread.
  34  */
  35 void btmrvl_interrupt(struct btmrvl_private *priv)
  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 EXPORT_SYMBOL_GPL(btmrvl_interrupt);
  46
  47 bool btmrvl_check_evtpkt(struct btmrvl_private *priv, struct sk_buff *skb)
  48 {
  49         struct hci_event_hdr *hdr = (void *) skb->data;
  50
  51         if (hdr->evt == HCI_EV_CMD_COMPLETE) {
  52                 struct hci_ev_cmd_complete *ec;
  53                 u16 opcode, ocf, ogf;
  54
  55                 ec = (void *) (skb->data + HCI_EVENT_HDR_SIZE);
  56                 opcode = __le16_to_cpu(ec->opcode);
  57                 ocf = hci_opcode_ocf(opcode);
  58                 ogf = hci_opcode_ogf(opcode);
  59
  60                 if (ocf == BT_CMD_MODULE_CFG_REQ &&
  61                                         priv->btmrvl_dev.sendcmdflag) {
  62                         priv->btmrvl_dev.sendcmdflag = false;
  63                         priv->adapter->cmd_complete = true;
  64                         wake_up_interruptible(&priv->adapter->cmd_wait_q);
  65                 }
  66
  67                 if (ogf == OGF) {
  68                         BT_DBG("vendor event skipped: ogf 0x%4.4x ocf 0x%4.4x",
  69                                ogf, ocf);
  70                         kfree_skb(skb);
  71                         return false;
  72                 }
  73         }
  74
  75         return true;
  76 }
  77 EXPORT_SYMBOL_GPL(btmrvl_check_evtpkt);
  78
  79 int btmrvl_process_event(struct btmrvl_private *priv, struct sk_buff *skb)
  80 {
  81         struct btmrvl_adapter *adapter = priv->adapter;
  82         struct btmrvl_event *event;
  83         int ret = 0;
  84
  85         event = (struct btmrvl_event *) skb->data;
  86         if (event->ec != 0xff) {
  87                 BT_DBG("Not Marvell Event=%x", event->ec);
  88                 ret = -EINVAL;
  89                 goto exit;
  90         }
  91
  92         switch (event->data[0]) {
  93         case BT_CMD_AUTO_SLEEP_MODE:
  94                 if (!event->data[2]) {
  95                         if (event->data[1] == BT_PS_ENABLE)
  96                                 adapter->psmode = 1;
  97                         else
  98                                 adapter->psmode = 0;
  99                         BT_DBG("PS Mode:%s",
 100                                 (adapter->psmode) ? "Enable" : "Disable");
 101                 } else {
 102                         BT_DBG("PS Mode command failed");
 103                 }
 104                 break;
 105
 106         case BT_CMD_HOST_SLEEP_CONFIG:
 107                 if (!event->data[3])
 108                         BT_DBG("gpio=%x, gap=%x", event->data[1],
 109                                                         event->data[2]);
 110                 else
 111                         BT_DBG("HSCFG command failed");
 112                 break;
 113
 114         case BT_CMD_HOST_SLEEP_ENABLE:
 115                 if (!event->data[1]) {
 116                         adapter->hs_state = HS_ACTIVATED;
 117                         if (adapter->psmode)
 118                                 adapter->ps_state = PS_SLEEP;
 119                         wake_up_interruptible(&adapter->cmd_wait_q);
 120                         BT_DBG("HS ACTIVATED!");
 121                 } else {
 122                         BT_DBG("HS Enable failed");
 123                 }
 124                 break;
 125
 126         case BT_CMD_MODULE_CFG_REQ:
 127                 if (priv->btmrvl_dev.sendcmdflag &&
 128                                 event->data[1] == MODULE_BRINGUP_REQ) {
 129                         BT_DBG("EVENT:%s",
 130                                 ((event->data[2] == MODULE_BROUGHT_UP) ||
 131                                 (event->data[2] == MODULE_ALREADY_UP)) ?
 132                                 "Bring-up succeed" : "Bring-up failed");
 133
 134                         if (event->length > 3 && event->data[3])
 135                                 priv->btmrvl_dev.dev_type = HCI_AMP;
 136                         else
 137                                 priv->btmrvl_dev.dev_type = HCI_BREDR;
 138
 139                         BT_DBG("dev_type: %d", priv->btmrvl_dev.dev_type);
 140                 } else if (priv->btmrvl_dev.sendcmdflag &&
 141                                 event->data[1] == MODULE_SHUTDOWN_REQ) {
 142                         BT_DBG("EVENT:%s", (event->data[2]) ?
 143                                 "Shutdown failed" : "Shutdown succeed");
 144                 } else {
 145                         BT_DBG("BT_CMD_MODULE_CFG_REQ resp for APP");
 146                         ret = -EINVAL;
 147                 }
 148                 break;
 149
 150         case BT_EVENT_POWER_STATE:
 151                 if (event->data[1] == BT_PS_SLEEP)
 152                         adapter->ps_state = PS_SLEEP;
 153                 BT_DBG("EVENT:%s",
 154                         (adapter->ps_state) ? "PS_SLEEP" : "PS_AWAKE");
 155                 break;
 156
 157         default:
 158                 BT_DBG("Unknown Event=%d", event->data[0]);
 159                 ret = -EINVAL;
 160                 break;
 161         }
 162
 163 exit:
 164         if (!ret)
 165                 kfree_skb(skb);
 166
 167         return ret;
 168 }
 169 EXPORT_SYMBOL_GPL(btmrvl_process_event);
 170
 171 int btmrvl_send_module_cfg_cmd(struct btmrvl_private *priv, int subcmd)
 172 {
 173         struct sk_buff *skb;
 174         struct btmrvl_cmd *cmd;
 175         int ret = 0;
 176
 177         skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
 178         if (skb == NULL) {
 179                 BT_ERR("No free skb");
 180                 return -ENOMEM;
 181         }
 182
 183         cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
 184         cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_MODULE_CFG_REQ));
 185         cmd->length = 1;
 186         cmd->data[0] = subcmd;
 187
 188         bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
 189
 190         skb->dev = (void *) priv->btmrvl_dev.hcidev;
 191         skb_queue_head(&priv->adapter->tx_queue, skb);
 192
 193         priv->btmrvl_dev.sendcmdflag = true;
 194
 195         priv->adapter->cmd_complete = false;
 196
 197         BT_DBG("Queue module cfg Command");
 198
 199         wake_up_interruptible(&priv->main_thread.wait_q);
 200
 201         if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q,
 202                                 priv->adapter->cmd_complete,
 203                                 msecs_to_jiffies(WAIT_UNTIL_CMD_RESP))) {
 204                 ret = -ETIMEDOUT;
 205                 BT_ERR("module_cfg_cmd(%x): timeout: %d",
 206                                         subcmd, priv->btmrvl_dev.sendcmdflag);
 207         }
 208
 209         BT_DBG("module cfg Command done");
 210
 211         return ret;
 212 }
 213 EXPORT_SYMBOL_GPL(btmrvl_send_module_cfg_cmd);
 214
 215 int btmrvl_send_hscfg_cmd(struct btmrvl_private *priv)
 216 {
 217         struct sk_buff *skb;
 218         struct btmrvl_cmd *cmd;
 219
 220         skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
 221         if (!skb) {
 222                 BT_ERR("No free skb");
 223                 return -ENOMEM;
 224         }
 225
 226         cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
 227         cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF,
 228                                                    BT_CMD_HOST_SLEEP_CONFIG));
 229         cmd->length = 2;
 230         cmd->data[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
 231         cmd->data[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff);
 232
 233         bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
 234
 235         skb->dev = (void *) priv->btmrvl_dev.hcidev;
 236         skb_queue_head(&priv->adapter->tx_queue, skb);
 237
 238         BT_DBG("Queue HSCFG Command, gpio=0x%x, gap=0x%x", cmd->data[0],
 239                cmd->data[1]);
 240
 241         return 0;
 242 }
 243 EXPORT_SYMBOL_GPL(btmrvl_send_hscfg_cmd);
 244
 245 int btmrvl_enable_ps(struct btmrvl_private *priv)
 246 {
 247         struct sk_buff *skb;
 248         struct btmrvl_cmd *cmd;
 249
 250         skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
 251         if (skb == NULL) {
 252                 BT_ERR("No free skb");
 253                 return -ENOMEM;
 254         }
 255
 256         cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
 257         cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF,
 258                                         BT_CMD_AUTO_SLEEP_MODE));
 259         cmd->length = 1;
 260
 261         if (priv->btmrvl_dev.psmode)
 262                 cmd->data[0] = BT_PS_ENABLE;
 263         else
 264                 cmd->data[0] = BT_PS_DISABLE;
 265
 266         bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
 267
 268         skb->dev = (void *) priv->btmrvl_dev.hcidev;
 269         skb_queue_head(&priv->adapter->tx_queue, skb);
 270
 271         BT_DBG("Queue PSMODE Command:%d", cmd->data[0]);
 272
 273         return 0;
 274 }
 275 EXPORT_SYMBOL_GPL(btmrvl_enable_ps);
 276
 277 int btmrvl_enable_hs(struct btmrvl_private *priv)
 278 {
 279         struct sk_buff *skb;
 280         struct btmrvl_cmd *cmd;
 281         int ret = 0;
 282
 283         skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
 284         if (skb == NULL) {
 285                 BT_ERR("No free skb");
 286                 return -ENOMEM;
 287         }
 288
 289         cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
 290         cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_HOST_SLEEP_ENABLE));
 291         cmd->length = 0;
 292
 293         bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
 294
 295         skb->dev = (void *) priv->btmrvl_dev.hcidev;
 296         skb_queue_head(&priv->adapter->tx_queue, skb);
 297
 298         BT_DBG("Queue hs enable Command");
 299
 300         wake_up_interruptible(&priv->main_thread.wait_q);
 301
 302         if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q,
 303                         priv->adapter->hs_state,
 304                         msecs_to_jiffies(WAIT_UNTIL_HS_STATE_CHANGED))) {
 305                 ret = -ETIMEDOUT;
 306                 BT_ERR("timeout: %d, %d,%d", priv->adapter->hs_state,
 307                                                 priv->adapter->ps_state,
 308                                                 priv->adapter->wakeup_tries);
 309         }
 310
 311         return ret;
 312 }
 313 EXPORT_SYMBOL_GPL(btmrvl_enable_hs);
 314
 315 int btmrvl_prepare_command(struct btmrvl_private *priv)
 316 {
 317         int ret = 0;
 318
 319         if (priv->btmrvl_dev.hscfgcmd) {
 320                 priv->btmrvl_dev.hscfgcmd = 0;
 321                 btmrvl_send_hscfg_cmd(priv);
 322         }
 323
 324         if (priv->btmrvl_dev.pscmd) {
 325                 priv->btmrvl_dev.pscmd = 0;
 326                 btmrvl_enable_ps(priv);
 327         }
 328
 329         if (priv->btmrvl_dev.hscmd) {
 330                 priv->btmrvl_dev.hscmd = 0;
 331
 332                 if (priv->btmrvl_dev.hsmode) {
 333                         ret = btmrvl_enable_hs(priv);
 334                 } else {
 335                         ret = priv->hw_wakeup_firmware(priv);
 336                         priv->adapter->hs_state = HS_DEACTIVATED;
 337                 }
 338         }
 339
 340         return ret;
 341 }
 342
 343 static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb)
 344 {
 345         int ret = 0;
 346
 347         if (!skb || !skb->data)
 348                 return -EINVAL;
 349
 350         if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) {
 351                 BT_ERR("Tx Error: Bad skb length %d : %d",
 352                                                 skb->len, BTM_UPLD_SIZE);
 353                 return -EINVAL;
 354         }
 355
 356         if (skb_headroom(skb) < BTM_HEADER_LEN) {
 357                 struct sk_buff *tmp = skb;
 358
 359                 skb = skb_realloc_headroom(skb, BTM_HEADER_LEN);
 360                 if (!skb) {
 361                         BT_ERR("Tx Error: realloc_headroom failed %d",
 362                                 BTM_HEADER_LEN);
 363                         skb = tmp;
 364                         return -EINVAL;
 365                 }
 366
 367                 kfree_skb(tmp);
 368         }
 369
 370         skb_push(skb, BTM_HEADER_LEN);
 371
 372         /* header type: byte[3]
 373          * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor
 374          * header length: byte[2][1][0]
 375          */
 376
 377         skb->data[0] = (skb->len & 0x0000ff);
 378         skb->data[1] = (skb->len & 0x00ff00) >> 8;
 379         skb->data[2] = (skb->len & 0xff0000) >> 16;
 380         skb->data[3] = bt_cb(skb)->pkt_type;
 381
 382         if (priv->hw_host_to_card)
 383                 ret = priv->hw_host_to_card(priv, skb->data, skb->len);
 384
 385         return ret;
 386 }
 387
 388 static void btmrvl_init_adapter(struct btmrvl_private *priv)
 389 {
 390         skb_queue_head_init(&priv->adapter->tx_queue);
 391
 392         priv->adapter->ps_state = PS_AWAKE;
 393
 394         init_waitqueue_head(&priv->adapter->cmd_wait_q);
 395 }
 396
 397 static void btmrvl_free_adapter(struct btmrvl_private *priv)
 398 {
 399         skb_queue_purge(&priv->adapter->tx_queue);
 400
 401         kfree(priv->adapter);
 402
 403         priv->adapter = NULL;
 404 }
 405
 406 static int btmrvl_ioctl(struct hci_dev *hdev,
 407                                 unsigned int cmd, unsigned long arg)
 408 {
 409         return -ENOIOCTLCMD;
 410 }
 411
 412 static int btmrvl_send_frame(struct sk_buff *skb)
 413 {
 414         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 415         struct btmrvl_private *priv = NULL;
 416
 417         BT_DBG("type=%d, len=%d", skb->pkt_type, skb->len);
 418
 419         if (!hdev) {
 420                 BT_ERR("Frame for unknown HCI device");
 421                 return -ENODEV;
 422         }
 423
 424         priv = hci_get_drvdata(hdev);
 425
 426         if (!test_bit(HCI_RUNNING, &hdev->flags)) {
 427                 BT_ERR("Failed testing HCI_RUNING, flags=%lx", hdev->flags);
 428                 print_hex_dump_bytes("data: ", DUMP_PREFIX_OFFSET,
 429                                                         skb->data, skb->len);
 430                 return -EBUSY;
 431         }
 432
 433         switch (bt_cb(skb)->pkt_type) {
 434         case HCI_COMMAND_PKT:
 435                 hdev->stat.cmd_tx++;
 436                 break;
 437
 438         case HCI_ACLDATA_PKT:
 439                 hdev->stat.acl_tx++;
 440                 break;
 441
 442         case HCI_SCODATA_PKT:
 443                 hdev->stat.sco_tx++;
 444                 break;
 445         }
 446
 447         skb_queue_tail(&priv->adapter->tx_queue, skb);
 448
 449         wake_up_interruptible(&priv->main_thread.wait_q);
 450
 451         return 0;
 452 }
 453
 454 static int btmrvl_flush(struct hci_dev *hdev)
 455 {
 456         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 457
 458         skb_queue_purge(&priv->adapter->tx_queue);
 459
 460         return 0;
 461 }
 462
 463 static int btmrvl_close(struct hci_dev *hdev)
 464 {
 465         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 466
 467         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 468                 return 0;
 469
 470         skb_queue_purge(&priv->adapter->tx_queue);
 471
 472         return 0;
 473 }
 474
 475 static int btmrvl_open(struct hci_dev *hdev)
 476 {
 477         set_bit(HCI_RUNNING, &hdev->flags);
 478
 479         return 0;
 480 }
 481
 482 /*
 483  * This function handles the event generated by firmware, rx data
 484  * received from firmware, and tx data sent from kernel.
 485  */
 486 static int btmrvl_service_main_thread(void *data)
 487 {
 488         struct btmrvl_thread *thread = data;
 489         struct btmrvl_private *priv = thread->priv;
 490         struct btmrvl_adapter *adapter = priv->adapter;
 491         wait_queue_t wait;
 492         struct sk_buff *skb;
 493         ulong flags;
 494
 495         init_waitqueue_entry(&wait, current);
 496
 497         for (;;) {
 498                 add_wait_queue(&thread->wait_q, &wait);
 499
 500                 set_current_state(TASK_INTERRUPTIBLE);
 501                 if (kthread_should_stop()) {
 502                         BT_DBG("main_thread: break from main thread");
 503                         break;
 504                 }
 505
 506                 if (adapter->wakeup_tries ||
 507                                 ((!adapter->int_count) &&
 508                                 (!priv->btmrvl_dev.tx_dnld_rdy ||
 509                                 skb_queue_empty(&adapter->tx_queue)))) {
 510                         BT_DBG("main_thread is sleeping...");
 511                         schedule();
 512                 }
 513
 514                 set_current_state(TASK_RUNNING);
 515
 516                 remove_wait_queue(&thread->wait_q, &wait);
 517
 518                 BT_DBG("main_thread woke up");
 519
 520                 spin_lock_irqsave(&priv->driver_lock, flags);
 521                 if (adapter->int_count) {
 522                         adapter->int_count = 0;
 523                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 524                         priv->hw_process_int_status(priv);
 525                 } else if (adapter->ps_state == PS_SLEEP &&
 526                                         !skb_queue_empty(&adapter->tx_queue)) {
 527                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 528                         adapter->wakeup_tries++;
 529                         priv->hw_wakeup_firmware(priv);
 530                         continue;
 531                 } else {
 532                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 533                 }
 534
 535                 if (adapter->ps_state == PS_SLEEP)
 536                         continue;
 537
 538                 if (!priv->btmrvl_dev.tx_dnld_rdy)
 539                         continue;
 540
 541                 skb = skb_dequeue(&adapter->tx_queue);
 542                 if (skb) {
 543                         if (btmrvl_tx_pkt(priv, skb))
 544                                 priv->btmrvl_dev.hcidev->stat.err_tx++;
 545                         else
 546                                 priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len;
 547
 548                         kfree_skb(skb);
 549                 }
 550         }
 551
 552         return 0;
 553 }
 554
 555 int btmrvl_register_hdev(struct btmrvl_private *priv)
 556 {
 557         struct hci_dev *hdev = NULL;
 558         int ret;
 559
 560         hdev = hci_alloc_dev();
 561         if (!hdev) {
 562                 BT_ERR("Can not allocate HCI device");
 563                 goto err_hdev;
 564         }
 565
 566         priv->btmrvl_dev.hcidev = hdev;
 567         hci_set_drvdata(hdev, priv);
 568
 569         hdev->bus = HCI_SDIO;
 570         hdev->open = btmrvl_open;
 571         hdev->close = btmrvl_close;
 572         hdev->flush = btmrvl_flush;
 573         hdev->send = btmrvl_send_frame;
 574         hdev->ioctl = btmrvl_ioctl;
 575
 576         btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
 577
 578         hdev->dev_type = priv->btmrvl_dev.dev_type;
 579
 580         ret = hci_register_dev(hdev);
 581         if (ret < 0) {
 582                 BT_ERR("Can not register HCI device");
 583                 goto err_hci_register_dev;
 584         }
 585
 586 #ifdef CONFIG_DEBUG_FS
 587         btmrvl_debugfs_init(hdev);
 588 #endif
 589
 590         return 0;
 591
 592 err_hci_register_dev:
 593         hci_free_dev(hdev);
 594
 595 err_hdev:
 596         /* Stop the thread servicing the interrupts */
 597         kthread_stop(priv->main_thread.task);
 598
 599         btmrvl_free_adapter(priv);
 600         kfree(priv);
 601
 602         return -ENOMEM;
 603 }
 604 EXPORT_SYMBOL_GPL(btmrvl_register_hdev);
 605
 606 struct btmrvl_private *btmrvl_add_card(void *card)
 607 {
 608         struct btmrvl_private *priv;
 609
 610         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 611         if (!priv) {
 612                 BT_ERR("Can not allocate priv");
 613                 goto err_priv;
 614         }
 615
 616         priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL);
 617         if (!priv->adapter) {
 618                 BT_ERR("Allocate buffer for btmrvl_adapter failed!");
 619                 goto err_adapter;
 620         }
 621
 622         btmrvl_init_adapter(priv);
 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         if (IS_ERR(priv->main_thread.task))
 632                 goto err_thread;
 633
 634         priv->btmrvl_dev.card = card;
 635         priv->btmrvl_dev.tx_dnld_rdy = true;
 636
 637         return priv;
 638
 639 err_thread:
 640         btmrvl_free_adapter(priv);
 641
 642 err_adapter:
 643         kfree(priv);
 644
 645 err_priv:
 646         return NULL;
 647 }
 648 EXPORT_SYMBOL_GPL(btmrvl_add_card);
 649
 650 int btmrvl_remove_card(struct btmrvl_private *priv)
 651 {
 652         struct hci_dev *hdev;
 653
 654         hdev = priv->btmrvl_dev.hcidev;
 655
 656         wake_up_interruptible(&priv->adapter->cmd_wait_q);
 657
 658         kthread_stop(priv->main_thread.task);
 659
 660 #ifdef CONFIG_DEBUG_FS
 661         btmrvl_debugfs_remove(hdev);
 662 #endif
 663
 664         hci_unregister_dev(hdev);
 665
 666         hci_free_dev(hdev);
 667
 668         priv->btmrvl_dev.hcidev = NULL;
 669
 670         btmrvl_free_adapter(priv);
 671
 672         kfree(priv);
 673
 674         return 0;
 675 }
 676 EXPORT_SYMBOL_GPL(btmrvl_remove_card);
 677
 678 MODULE_AUTHOR("Marvell International Ltd.");
 679 MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION);
 680 MODULE_VERSION(VERSION);
 681 MODULE_LICENSE("GPL v2");