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 (priv->btmrvl_dev.sendcmdflag) {
  61                         priv->btmrvl_dev.sendcmdflag = false;
  62                         priv->adapter->cmd_complete = true;
  63                         wake_up_interruptible(&priv->adapter->cmd_wait_q);
  64                 }
  65
  66                 if (ogf == OGF) {
  67                         BT_DBG("vendor event skipped: ogf 0x%4.4x ocf 0x%4.4x",
  68                                ogf, ocf);
  69                         kfree_skb(skb);
  70                         return false;
  71                 }
  72         }
  73
  74         return true;
  75 }
  76 EXPORT_SYMBOL_GPL(btmrvl_check_evtpkt);
  77
  78 int btmrvl_process_event(struct btmrvl_private *priv, struct sk_buff *skb)
  79 {
  80         struct btmrvl_adapter *adapter = priv->adapter;
  81         struct btmrvl_event *event;
  82         int ret = 0;
  83
  84         event = (struct btmrvl_event *) skb->data;
  85         if (event->ec != 0xff) {
  86                 BT_DBG("Not Marvell Event=%x", event->ec);
  87                 ret = -EINVAL;
  88                 goto exit;
  89         }
  90
  91         switch (event->data[0]) {
  92         case BT_CMD_AUTO_SLEEP_MODE:
  93                 if (!event->data[2]) {
  94                         if (event->data[1] == BT_PS_ENABLE)
  95                                 adapter->psmode = 1;
  96                         else
  97                                 adapter->psmode = 0;
  98                         BT_DBG("PS Mode:%s",
  99                                 (adapter->psmode) ? "Enable" : "Disable");
 100                 } else {
 101                         BT_DBG("PS Mode command failed");
 102                 }
 103                 break;
 104
 105         case BT_CMD_HOST_SLEEP_CONFIG:
 106                 if (!event->data[3])
 107                         BT_DBG("gpio=%x, gap=%x", event->data[1],
 108                                                         event->data[2]);
 109                 else
 110                         BT_DBG("HSCFG command failed");
 111                 break;
 112
 113         case BT_CMD_HOST_SLEEP_ENABLE:
 114                 if (!event->data[1]) {
 115                         adapter->hs_state = HS_ACTIVATED;
 116                         if (adapter->psmode)
 117                                 adapter->ps_state = PS_SLEEP;
 118                         BT_DBG("HS ACTIVATED!");
 119                 } else {
 120                         BT_DBG("HS Enable failed");
 121                 }
 122                 break;
 123
 124         case BT_CMD_MODULE_CFG_REQ:
 125                 if (priv->btmrvl_dev.sendcmdflag &&
 126                                 event->data[1] == MODULE_BRINGUP_REQ) {
 127                         BT_DBG("EVENT:%s",
 128                                 ((event->data[2] == MODULE_BROUGHT_UP) ||
 129                                 (event->data[2] == MODULE_ALREADY_UP)) ?
 130                                 "Bring-up succeed" : "Bring-up failed");
 131
 132                         if (event->length > 3 && event->data[3])
 133                                 priv->btmrvl_dev.dev_type = HCI_AMP;
 134                         else
 135                                 priv->btmrvl_dev.dev_type = HCI_BREDR;
 136
 137                         BT_DBG("dev_type: %d", priv->btmrvl_dev.dev_type);
 138                 } else if (priv->btmrvl_dev.sendcmdflag &&
 139                                 event->data[1] == MODULE_SHUTDOWN_REQ) {
 140                         BT_DBG("EVENT:%s", (event->data[2]) ?
 141                                 "Shutdown failed" : "Shutdown succeed");
 142                 } else {
 143                         BT_DBG("BT_CMD_MODULE_CFG_REQ resp for APP");
 144                         ret = -EINVAL;
 145                 }
 146                 break;
 147
 148         case BT_EVENT_POWER_STATE:
 149                 if (event->data[1] == BT_PS_SLEEP)
 150                         adapter->ps_state = PS_SLEEP;
 151                 BT_DBG("EVENT:%s",
 152                         (adapter->ps_state) ? "PS_SLEEP" : "PS_AWAKE");
 153                 break;
 154
 155         default:
 156                 BT_DBG("Unknown Event=%d", event->data[0]);
 157                 ret = -EINVAL;
 158                 break;
 159         }
 160
 161 exit:
 162         if (!ret)
 163                 kfree_skb(skb);
 164
 165         return ret;
 166 }
 167 EXPORT_SYMBOL_GPL(btmrvl_process_event);
 168
 169 static int btmrvl_send_sync_cmd(struct btmrvl_private *priv, u16 cmd_no,
 170                                 const void *param, u8 len)
 171 {
 172         struct sk_buff *skb;
 173         struct hci_command_hdr *hdr;
 174
 175         skb = bt_skb_alloc(HCI_COMMAND_HDR_SIZE + len, GFP_ATOMIC);
 176         if (skb == NULL) {
 177                 BT_ERR("No free skb");
 178                 return -ENOMEM;
 179         }
 180
 181         hdr = (struct hci_command_hdr *)skb_put(skb, HCI_COMMAND_HDR_SIZE);
 182         hdr->opcode = cpu_to_le16(hci_opcode_pack(OGF, cmd_no));
 183         hdr->plen = len;
 184
 185         if (len)
 186                 memcpy(skb_put(skb, len), param, len);
 187
 188         bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
 189
 190         skb_queue_head(&priv->adapter->tx_queue, skb);
 191
 192         priv->btmrvl_dev.sendcmdflag = true;
 193
 194         priv->adapter->cmd_complete = false;
 195
 196         wake_up_interruptible(&priv->main_thread.wait_q);
 197
 198         if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q,
 199                                 priv->adapter->cmd_complete,
 200                                 msecs_to_jiffies(WAIT_UNTIL_CMD_RESP)))
 201                 return -ETIMEDOUT;
 202
 203         return 0;
 204 }
 205
 206 int btmrvl_send_module_cfg_cmd(struct btmrvl_private *priv, int subcmd)
 207 {
 208         int ret;
 209
 210         ret = btmrvl_send_sync_cmd(priv, BT_CMD_MODULE_CFG_REQ, &subcmd, 1);
 211         if (ret)
 212                 BT_ERR("module_cfg_cmd(%x) failed\n", subcmd);
 213
 214         return ret;
 215 }
 216 EXPORT_SYMBOL_GPL(btmrvl_send_module_cfg_cmd);
 217
 218 int btmrvl_send_hscfg_cmd(struct btmrvl_private *priv)
 219 {
 220         int ret;
 221         u8 param[2];
 222
 223         param[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
 224         param[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff);
 225
 226         BT_DBG("Sending HSCFG Command, gpio=0x%x, gap=0x%x",
 227                param[0], param[1]);
 228
 229         ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_CONFIG, param, 2);
 230         if (ret)
 231                 BT_ERR("HSCFG command failed\n");
 232
 233         return ret;
 234 }
 235 EXPORT_SYMBOL_GPL(btmrvl_send_hscfg_cmd);
 236
 237 int btmrvl_enable_ps(struct btmrvl_private *priv)
 238 {
 239         int ret;
 240         u8 param;
 241
 242         if (priv->btmrvl_dev.psmode)
 243                 param = BT_PS_ENABLE;
 244         else
 245                 param = BT_PS_DISABLE;
 246
 247         ret = btmrvl_send_sync_cmd(priv, BT_CMD_AUTO_SLEEP_MODE, &param, 1);
 248         if (ret)
 249                 BT_ERR("PSMODE command failed\n");
 250
 251         return 0;
 252 }
 253 EXPORT_SYMBOL_GPL(btmrvl_enable_ps);
 254
 255 int btmrvl_enable_hs(struct btmrvl_private *priv)
 256 {
 257         int ret;
 258
 259         ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_ENABLE, NULL, 0);
 260         if (ret)
 261                 BT_ERR("Host sleep enable command failed\n");
 262
 263         return ret;
 264 }
 265 EXPORT_SYMBOL_GPL(btmrvl_enable_hs);
 266
 267 int btmrvl_prepare_command(struct btmrvl_private *priv)
 268 {
 269         int ret = 0;
 270
 271         if (priv->btmrvl_dev.hscfgcmd) {
 272                 priv->btmrvl_dev.hscfgcmd = 0;
 273                 btmrvl_send_hscfg_cmd(priv);
 274         }
 275
 276         if (priv->btmrvl_dev.pscmd) {
 277                 priv->btmrvl_dev.pscmd = 0;
 278                 btmrvl_enable_ps(priv);
 279         }
 280
 281         if (priv->btmrvl_dev.hscmd) {
 282                 priv->btmrvl_dev.hscmd = 0;
 283
 284                 if (priv->btmrvl_dev.hsmode) {
 285                         ret = btmrvl_enable_hs(priv);
 286                 } else {
 287                         ret = priv->hw_wakeup_firmware(priv);
 288                         priv->adapter->hs_state = HS_DEACTIVATED;
 289                 }
 290         }
 291
 292         return ret;
 293 }
 294
 295 static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb)
 296 {
 297         int ret = 0;
 298
 299         if (!skb || !skb->data)
 300                 return -EINVAL;
 301
 302         if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) {
 303                 BT_ERR("Tx Error: Bad skb length %d : %d",
 304                                                 skb->len, BTM_UPLD_SIZE);
 305                 return -EINVAL;
 306         }
 307
 308         if (skb_headroom(skb) < BTM_HEADER_LEN) {
 309                 struct sk_buff *tmp = skb;
 310
 311                 skb = skb_realloc_headroom(skb, BTM_HEADER_LEN);
 312                 if (!skb) {
 313                         BT_ERR("Tx Error: realloc_headroom failed %d",
 314                                 BTM_HEADER_LEN);
 315                         skb = tmp;
 316                         return -EINVAL;
 317                 }
 318
 319                 kfree_skb(tmp);
 320         }
 321
 322         skb_push(skb, BTM_HEADER_LEN);
 323
 324         /* header type: byte[3]
 325          * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor
 326          * header length: byte[2][1][0]
 327          */
 328
 329         skb->data[0] = (skb->len & 0x0000ff);
 330         skb->data[1] = (skb->len & 0x00ff00) >> 8;
 331         skb->data[2] = (skb->len & 0xff0000) >> 16;
 332         skb->data[3] = bt_cb(skb)->pkt_type;
 333
 334         if (priv->hw_host_to_card)
 335                 ret = priv->hw_host_to_card(priv, skb->data, skb->len);
 336
 337         return ret;
 338 }
 339
 340 static void btmrvl_init_adapter(struct btmrvl_private *priv)
 341 {
 342         skb_queue_head_init(&priv->adapter->tx_queue);
 343
 344         priv->adapter->ps_state = PS_AWAKE;
 345
 346         init_waitqueue_head(&priv->adapter->cmd_wait_q);
 347 }
 348
 349 static void btmrvl_free_adapter(struct btmrvl_private *priv)
 350 {
 351         skb_queue_purge(&priv->adapter->tx_queue);
 352
 353         kfree(priv->adapter);
 354
 355         priv->adapter = NULL;
 356 }
 357
 358 static int btmrvl_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
 359 {
 360         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 361
 362         BT_DBG("type=%d, len=%d", skb->pkt_type, skb->len);
 363
 364         if (!test_bit(HCI_RUNNING, &hdev->flags)) {
 365                 BT_ERR("Failed testing HCI_RUNING, flags=%lx", hdev->flags);
 366                 print_hex_dump_bytes("data: ", DUMP_PREFIX_OFFSET,
 367                                                         skb->data, skb->len);
 368                 return -EBUSY;
 369         }
 370
 371         switch (bt_cb(skb)->pkt_type) {
 372         case HCI_COMMAND_PKT:
 373                 hdev->stat.cmd_tx++;
 374                 break;
 375
 376         case HCI_ACLDATA_PKT:
 377                 hdev->stat.acl_tx++;
 378                 break;
 379
 380         case HCI_SCODATA_PKT:
 381                 hdev->stat.sco_tx++;
 382                 break;
 383         }
 384
 385         skb_queue_tail(&priv->adapter->tx_queue, skb);
 386
 387         wake_up_interruptible(&priv->main_thread.wait_q);
 388
 389         return 0;
 390 }
 391
 392 static int btmrvl_flush(struct hci_dev *hdev)
 393 {
 394         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 395
 396         skb_queue_purge(&priv->adapter->tx_queue);
 397
 398         return 0;
 399 }
 400
 401 static int btmrvl_close(struct hci_dev *hdev)
 402 {
 403         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 404
 405         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 406                 return 0;
 407
 408         skb_queue_purge(&priv->adapter->tx_queue);
 409
 410         return 0;
 411 }
 412
 413 static int btmrvl_open(struct hci_dev *hdev)
 414 {
 415         set_bit(HCI_RUNNING, &hdev->flags);
 416
 417         return 0;
 418 }
 419
 420 /*
 421  * This function parses provided calibration data input. It should contain
 422  * hex bytes separated by space or new line character. Here is an example.
 423  * 00 1C 01 37 FF FF FF FF 02 04 7F 01
 424  * CE BA 00 00 00 2D C6 C0 00 00 00 00
 425  * 00 F0 00 00
 426  */
 427 static int btmrvl_parse_cal_cfg(const u8 *src, u32 len, u8 *dst, u32 dst_size)
 428 {
 429         const u8 *s = src;
 430         u8 *d = dst;
 431         int ret;
 432         u8 tmp[3];
 433
 434         tmp[2] = '\0';
 435         while ((s - src) <= len - 2) {
 436                 if (isspace(*s)) {
 437                         s++;
 438                         continue;
 439                 }
 440
 441                 if (isxdigit(*s)) {
 442                         if ((d - dst) >= dst_size) {
 443                                 BT_ERR("calibration data file too big!!!");
 444                                 return -EINVAL;
 445                         }
 446
 447                         memcpy(tmp, s, 2);
 448
 449                         ret = kstrtou8(tmp, 16, d++);
 450                         if (ret < 0)
 451                                 return ret;
 452
 453                         s += 2;
 454                 } else {
 455                         return -EINVAL;
 456                 }
 457         }
 458         if (d == dst)
 459                 return -EINVAL;
 460
 461         return 0;
 462 }
 463
 464 static int btmrvl_load_cal_data(struct btmrvl_private *priv,
 465                                 u8 *config_data)
 466 {
 467         int i, ret;
 468         u8 data[BT_CMD_DATA_SIZE];
 469
 470         data[0] = 0x00;
 471         data[1] = 0x00;
 472         data[2] = 0x00;
 473         data[3] = BT_CMD_DATA_SIZE - 4;
 474
 475         /* Swap cal-data bytes. Each four bytes are swapped. Considering 4
 476          * byte SDIO header offset, mapping of input and output bytes will be
 477          * {3, 2, 1, 0} -> {0+4, 1+4, 2+4, 3+4},
 478          * {7, 6, 5, 4} -> {4+4, 5+4, 6+4, 7+4} */
 479         for (i = 4; i < BT_CMD_DATA_SIZE; i++)
 480                 data[i] = config_data[(i / 4) * 8 - 1 - i];
 481
 482         print_hex_dump_bytes("Calibration data: ",
 483                              DUMP_PREFIX_OFFSET, data, BT_CMD_DATA_SIZE);
 484
 485         ret = btmrvl_send_sync_cmd(priv, BT_CMD_LOAD_CONFIG_DATA, data,
 486                                    BT_CMD_DATA_SIZE);
 487         if (ret)
 488                 BT_ERR("Failed to download caibration data\n");
 489
 490         return 0;
 491 }
 492
 493 static int
 494 btmrvl_process_cal_cfg(struct btmrvl_private *priv, u8 *data, u32 size)
 495 {
 496         u8 cal_data[BT_CAL_DATA_SIZE];
 497         int ret;
 498
 499         ret = btmrvl_parse_cal_cfg(data, size, cal_data, sizeof(cal_data));
 500         if (ret)
 501                 return ret;
 502
 503         ret = btmrvl_load_cal_data(priv, cal_data);
 504         if (ret) {
 505                 BT_ERR("Fail to load calibrate data");
 506                 return ret;
 507         }
 508
 509         return 0;
 510 }
 511
 512 static int btmrvl_cal_data_config(struct btmrvl_private *priv)
 513 {
 514         const struct firmware *cfg;
 515         int ret;
 516         const char *cal_data = priv->btmrvl_dev.cal_data;
 517
 518         if (!cal_data)
 519                 return 0;
 520
 521         ret = request_firmware(&cfg, cal_data, priv->btmrvl_dev.dev);
 522         if (ret < 0) {
 523                 BT_DBG("Failed to get %s file, skipping cal data download",
 524                        cal_data);
 525                 return 0;
 526         }
 527
 528         ret = btmrvl_process_cal_cfg(priv, (u8 *)cfg->data, cfg->size);
 529         release_firmware(cfg);
 530         return ret;
 531 }
 532
 533 static int btmrvl_setup(struct hci_dev *hdev)
 534 {
 535         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 536
 537         btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
 538
 539         if (btmrvl_cal_data_config(priv))
 540                 BT_ERR("Set cal data failed");
 541
 542         priv->btmrvl_dev.psmode = 1;
 543         btmrvl_enable_ps(priv);
 544
 545         priv->btmrvl_dev.gpio_gap = 0xffff;
 546         btmrvl_send_hscfg_cmd(priv);
 547
 548         return 0;
 549 }
 550
 551 /*
 552  * This function handles the event generated by firmware, rx data
 553  * received from firmware, and tx data sent from kernel.
 554  */
 555 static int btmrvl_service_main_thread(void *data)
 556 {
 557         struct btmrvl_thread *thread = data;
 558         struct btmrvl_private *priv = thread->priv;
 559         struct btmrvl_adapter *adapter = priv->adapter;
 560         wait_queue_t wait;
 561         struct sk_buff *skb;
 562         ulong flags;
 563
 564         init_waitqueue_entry(&wait, current);
 565
 566         for (;;) {
 567                 add_wait_queue(&thread->wait_q, &wait);
 568
 569                 set_current_state(TASK_INTERRUPTIBLE);
 570                 if (kthread_should_stop()) {
 571                         BT_DBG("main_thread: break from main thread");
 572                         break;
 573                 }
 574
 575                 if (adapter->wakeup_tries ||
 576                                 ((!adapter->int_count) &&
 577                                 (!priv->btmrvl_dev.tx_dnld_rdy ||
 578                                 skb_queue_empty(&adapter->tx_queue)))) {
 579                         BT_DBG("main_thread is sleeping...");
 580                         schedule();
 581                 }
 582
 583                 set_current_state(TASK_RUNNING);
 584
 585                 remove_wait_queue(&thread->wait_q, &wait);
 586
 587                 BT_DBG("main_thread woke up");
 588
 589                 spin_lock_irqsave(&priv->driver_lock, flags);
 590                 if (adapter->int_count) {
 591                         adapter->int_count = 0;
 592                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 593                         priv->hw_process_int_status(priv);
 594                 } else if (adapter->ps_state == PS_SLEEP &&
 595                                         !skb_queue_empty(&adapter->tx_queue)) {
 596                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 597                         adapter->wakeup_tries++;
 598                         priv->hw_wakeup_firmware(priv);
 599                         continue;
 600                 } else {
 601                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 602                 }
 603
 604                 if (adapter->ps_state == PS_SLEEP)
 605                         continue;
 606
 607                 if (!priv->btmrvl_dev.tx_dnld_rdy)
 608                         continue;
 609
 610                 skb = skb_dequeue(&adapter->tx_queue);
 611                 if (skb) {
 612                         if (btmrvl_tx_pkt(priv, skb))
 613                                 priv->btmrvl_dev.hcidev->stat.err_tx++;
 614                         else
 615                                 priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len;
 616
 617                         kfree_skb(skb);
 618                 }
 619         }
 620
 621         return 0;
 622 }
 623
 624 int btmrvl_register_hdev(struct btmrvl_private *priv)
 625 {
 626         struct hci_dev *hdev = NULL;
 627         int ret;
 628
 629         hdev = hci_alloc_dev();
 630         if (!hdev) {
 631                 BT_ERR("Can not allocate HCI device");
 632                 goto err_hdev;
 633         }
 634
 635         priv->btmrvl_dev.hcidev = hdev;
 636         hci_set_drvdata(hdev, priv);
 637
 638         hdev->bus   = HCI_SDIO;
 639         hdev->open  = btmrvl_open;
 640         hdev->close = btmrvl_close;
 641         hdev->flush = btmrvl_flush;
 642         hdev->send  = btmrvl_send_frame;
 643         hdev->setup = btmrvl_setup;
 644
 645         hdev->dev_type = priv->btmrvl_dev.dev_type;
 646
 647         ret = hci_register_dev(hdev);
 648         if (ret < 0) {
 649                 BT_ERR("Can not register HCI device");
 650                 goto err_hci_register_dev;
 651         }
 652
 653 #ifdef CONFIG_DEBUG_FS
 654         btmrvl_debugfs_init(hdev);
 655 #endif
 656
 657         return 0;
 658
 659 err_hci_register_dev:
 660         hci_free_dev(hdev);
 661
 662 err_hdev:
 663         /* Stop the thread servicing the interrupts */
 664         kthread_stop(priv->main_thread.task);
 665
 666         btmrvl_free_adapter(priv);
 667         kfree(priv);
 668
 669         return -ENOMEM;
 670 }
 671 EXPORT_SYMBOL_GPL(btmrvl_register_hdev);
 672
 673 struct btmrvl_private *btmrvl_add_card(void *card)
 674 {
 675         struct btmrvl_private *priv;
 676
 677         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 678         if (!priv) {
 679                 BT_ERR("Can not allocate priv");
 680                 goto err_priv;
 681         }
 682
 683         priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL);
 684         if (!priv->adapter) {
 685                 BT_ERR("Allocate buffer for btmrvl_adapter failed!");
 686                 goto err_adapter;
 687         }
 688
 689         btmrvl_init_adapter(priv);
 690
 691         BT_DBG("Starting kthread...");
 692         priv->main_thread.priv = priv;
 693         spin_lock_init(&priv->driver_lock);
 694
 695         init_waitqueue_head(&priv->main_thread.wait_q);
 696         priv->main_thread.task = kthread_run(btmrvl_service_main_thread,
 697                                 &priv->main_thread, "btmrvl_main_service");
 698
 699         priv->btmrvl_dev.card = card;
 700         priv->btmrvl_dev.tx_dnld_rdy = true;
 701
 702         return priv;
 703
 704 err_adapter:
 705         kfree(priv);
 706
 707 err_priv:
 708         return NULL;
 709 }
 710 EXPORT_SYMBOL_GPL(btmrvl_add_card);
 711
 712 int btmrvl_remove_card(struct btmrvl_private *priv)
 713 {
 714         struct hci_dev *hdev;
 715
 716         hdev = priv->btmrvl_dev.hcidev;
 717
 718         wake_up_interruptible(&priv->adapter->cmd_wait_q);
 719
 720         kthread_stop(priv->main_thread.task);
 721
 722 #ifdef CONFIG_DEBUG_FS
 723         btmrvl_debugfs_remove(hdev);
 724 #endif
 725
 726         hci_unregister_dev(hdev);
 727
 728         hci_free_dev(hdev);
 729
 730         priv->btmrvl_dev.hcidev = NULL;
 731
 732         btmrvl_free_adapter(priv);
 733
 734         kfree(priv);
 735
 736         return 0;
 737 }
 738 EXPORT_SYMBOL_GPL(btmrvl_remove_card);
 739
 740 MODULE_AUTHOR("Marvell International Ltd.");
 741 MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION);
 742 MODULE_VERSION(VERSION);
 743 MODULE_LICENSE("GPL v2");