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 #include <linux/of.h>
  23 #include <net/bluetooth/bluetooth.h>
  24 #include <net/bluetooth/hci_core.h>
  25 #include <linux/mmc/sdio_func.h>
  26
  27 #include "btmrvl_drv.h"
  28 #include "btmrvl_sdio.h"
  29
  30 #define VERSION "1.0"
  31
  32 /*
  33  * This function is called by interface specific interrupt handler.
  34  * It updates Power Save & Host Sleep states, and wakes up the main
  35  * thread.
  36  */
  37 void btmrvl_interrupt(struct btmrvl_private *priv)
  38 {
  39         priv->adapter->ps_state = PS_AWAKE;
  40
  41         priv->adapter->wakeup_tries = 0;
  42
  43         priv->adapter->int_count++;
  44
  45         if (priv->adapter->hs_state == HS_ACTIVATED) {
  46                 BT_DBG("BT: HS DEACTIVATED in ISR!");
  47                 priv->adapter->hs_state = HS_DEACTIVATED;
  48         }
  49
  50         wake_up_interruptible(&priv->main_thread.wait_q);
  51 }
  52 EXPORT_SYMBOL_GPL(btmrvl_interrupt);
  53
  54 bool btmrvl_check_evtpkt(struct btmrvl_private *priv, struct sk_buff *skb)
  55 {
  56         struct hci_event_hdr *hdr = (void *) skb->data;
  57
  58         if (hdr->evt == HCI_EV_CMD_COMPLETE) {
  59                 struct hci_ev_cmd_complete *ec;
  60                 u16 opcode;
  61
  62                 ec = (void *) (skb->data + HCI_EVENT_HDR_SIZE);
  63                 opcode = __le16_to_cpu(ec->opcode);
  64
  65                 if (priv->btmrvl_dev.sendcmdflag) {
  66                         priv->btmrvl_dev.sendcmdflag = false;
  67                         priv->adapter->cmd_complete = true;
  68                         wake_up_interruptible(&priv->adapter->cmd_wait_q);
  69
  70                         if (hci_opcode_ogf(opcode) == 0x3F) {
  71                                 BT_DBG("vendor event skipped: opcode=%#4.4x",
  72                                        opcode);
  73                                 kfree_skb(skb);
  74                                 return false;
  75                         }
  76                 }
  77         }
  78
  79         return true;
  80 }
  81 EXPORT_SYMBOL_GPL(btmrvl_check_evtpkt);
  82
  83 int btmrvl_process_event(struct btmrvl_private *priv, struct sk_buff *skb)
  84 {
  85         struct btmrvl_adapter *adapter = priv->adapter;
  86         struct btmrvl_event *event;
  87         int ret = 0;
  88
  89         event = (struct btmrvl_event *) skb->data;
  90         if (event->ec != 0xff) {
  91                 BT_DBG("Not Marvell Event=%x", event->ec);
  92                 ret = -EINVAL;
  93                 goto exit;
  94         }
  95
  96         switch (event->data[0]) {
  97         case BT_EVENT_AUTO_SLEEP_MODE:
  98                 if (!event->data[2]) {
  99                         if (event->data[1] == BT_PS_ENABLE)
 100                                 adapter->psmode = 1;
 101                         else
 102                                 adapter->psmode = 0;
 103                         BT_DBG("PS Mode:%s",
 104                                 (adapter->psmode) ? "Enable" : "Disable");
 105                 } else {
 106                         BT_DBG("PS Mode command failed");
 107                 }
 108                 break;
 109
 110         case BT_EVENT_HOST_SLEEP_CONFIG:
 111                 if (!event->data[3])
 112                         BT_DBG("gpio=%x, gap=%x", event->data[1],
 113                                                         event->data[2]);
 114                 else
 115                         BT_DBG("HSCFG command failed");
 116                 break;
 117
 118         case BT_EVENT_HOST_SLEEP_ENABLE:
 119                 if (!event->data[1]) {
 120                         adapter->hs_state = HS_ACTIVATED;
 121                         if (adapter->psmode)
 122                                 adapter->ps_state = PS_SLEEP;
 123                         wake_up_interruptible(&adapter->event_hs_wait_q);
 124                         BT_DBG("HS ACTIVATED!");
 125                 } else {
 126                         BT_DBG("HS Enable failed");
 127                 }
 128                 break;
 129
 130         case BT_EVENT_MODULE_CFG_REQ:
 131                 if (priv->btmrvl_dev.sendcmdflag &&
 132                                 event->data[1] == MODULE_BRINGUP_REQ) {
 133                         BT_DBG("EVENT:%s",
 134                                 ((event->data[2] == MODULE_BROUGHT_UP) ||
 135                                 (event->data[2] == MODULE_ALREADY_UP)) ?
 136                                 "Bring-up succeed" : "Bring-up failed");
 137
 138                         if (event->length > 3 && event->data[3])
 139                                 priv->btmrvl_dev.dev_type = HCI_AMP;
 140                         else
 141                                 priv->btmrvl_dev.dev_type = HCI_BREDR;
 142
 143                         BT_DBG("dev_type: %d", priv->btmrvl_dev.dev_type);
 144                 } else if (priv->btmrvl_dev.sendcmdflag &&
 145                                 event->data[1] == MODULE_SHUTDOWN_REQ) {
 146                         BT_DBG("EVENT:%s", (event->data[2]) ?
 147                                 "Shutdown failed" : "Shutdown succeed");
 148                 } else {
 149                         BT_DBG("BT_CMD_MODULE_CFG_REQ resp for APP");
 150                         ret = -EINVAL;
 151                 }
 152                 break;
 153
 154         case BT_EVENT_POWER_STATE:
 155                 if (event->data[1] == BT_PS_SLEEP)
 156                         adapter->ps_state = PS_SLEEP;
 157                 BT_DBG("EVENT:%s",
 158                         (adapter->ps_state) ? "PS_SLEEP" : "PS_AWAKE");
 159                 break;
 160
 161         default:
 162                 BT_DBG("Unknown Event=%d", event->data[0]);
 163                 ret = -EINVAL;
 164                 break;
 165         }
 166
 167 exit:
 168         if (!ret)
 169                 kfree_skb(skb);
 170
 171         return ret;
 172 }
 173 EXPORT_SYMBOL_GPL(btmrvl_process_event);
 174
 175 static int btmrvl_send_sync_cmd(struct btmrvl_private *priv, u16 opcode,
 176                                 const void *param, u8 len)
 177 {
 178         struct sk_buff *skb;
 179         struct hci_command_hdr *hdr;
 180
 181         if (priv->surprise_removed) {
 182                 BT_ERR("Card is removed");
 183                 return -EFAULT;
 184         }
 185
 186         skb = bt_skb_alloc(HCI_COMMAND_HDR_SIZE + len, GFP_ATOMIC);
 187         if (skb == NULL) {
 188                 BT_ERR("No free skb");
 189                 return -ENOMEM;
 190         }
 191
 192         hdr = (struct hci_command_hdr *)skb_put(skb, HCI_COMMAND_HDR_SIZE);
 193         hdr->opcode = cpu_to_le16(opcode);
 194         hdr->plen = len;
 195
 196         if (len)
 197                 memcpy(skb_put(skb, len), param, len);
 198
 199         bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
 200
 201         skb_queue_head(&priv->adapter->tx_queue, skb);
 202
 203         priv->btmrvl_dev.sendcmdflag = true;
 204
 205         priv->adapter->cmd_complete = false;
 206
 207         wake_up_interruptible(&priv->main_thread.wait_q);
 208
 209         if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q,
 210                                               priv->adapter->cmd_complete ||
 211                                               priv->surprise_removed,
 212                                               WAIT_UNTIL_CMD_RESP))
 213                 return -ETIMEDOUT;
 214
 215         if (priv->surprise_removed)
 216                 return -EFAULT;
 217
 218         return 0;
 219 }
 220
 221 int btmrvl_send_module_cfg_cmd(struct btmrvl_private *priv, u8 subcmd)
 222 {
 223         int ret;
 224
 225         ret = btmrvl_send_sync_cmd(priv, BT_CMD_MODULE_CFG_REQ, &subcmd, 1);
 226         if (ret)
 227                 BT_ERR("module_cfg_cmd(%x) failed", subcmd);
 228
 229         return ret;
 230 }
 231 EXPORT_SYMBOL_GPL(btmrvl_send_module_cfg_cmd);
 232
 233 int btmrvl_pscan_window_reporting(struct btmrvl_private *priv, u8 subcmd)
 234 {
 235         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 236         int ret;
 237
 238         if (!card->support_pscan_win_report)
 239                 return 0;
 240
 241         ret = btmrvl_send_sync_cmd(priv, BT_CMD_PSCAN_WIN_REPORT_ENABLE,
 242                                    &subcmd, 1);
 243         if (ret)
 244                 BT_ERR("PSCAN_WIN_REPORT_ENABLE command failed: %#x", ret);
 245
 246         return ret;
 247 }
 248 EXPORT_SYMBOL_GPL(btmrvl_pscan_window_reporting);
 249
 250 int btmrvl_send_hscfg_cmd(struct btmrvl_private *priv)
 251 {
 252         int ret;
 253         u8 param[2];
 254
 255         param[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
 256         param[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff);
 257
 258         BT_DBG("Sending HSCFG Command, gpio=0x%x, gap=0x%x",
 259                param[0], param[1]);
 260
 261         ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_CONFIG, param, 2);
 262         if (ret)
 263                 BT_ERR("HSCFG command failed");
 264
 265         return ret;
 266 }
 267 EXPORT_SYMBOL_GPL(btmrvl_send_hscfg_cmd);
 268
 269 int btmrvl_enable_ps(struct btmrvl_private *priv)
 270 {
 271         int ret;
 272         u8 param;
 273
 274         if (priv->btmrvl_dev.psmode)
 275                 param = BT_PS_ENABLE;
 276         else
 277                 param = BT_PS_DISABLE;
 278
 279         ret = btmrvl_send_sync_cmd(priv, BT_CMD_AUTO_SLEEP_MODE, &param, 1);
 280         if (ret)
 281                 BT_ERR("PSMODE command failed");
 282
 283         return 0;
 284 }
 285 EXPORT_SYMBOL_GPL(btmrvl_enable_ps);
 286
 287 int btmrvl_enable_hs(struct btmrvl_private *priv)
 288 {
 289         struct btmrvl_adapter *adapter = priv->adapter;
 290         int ret;
 291
 292         ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_ENABLE, NULL, 0);
 293         if (ret) {
 294                 BT_ERR("Host sleep enable command failed");
 295                 return ret;
 296         }
 297
 298         ret = wait_event_interruptible_timeout(adapter->event_hs_wait_q,
 299                                                adapter->hs_state ||
 300                                                priv->surprise_removed,
 301                                                WAIT_UNTIL_HS_STATE_CHANGED);
 302         if (ret < 0 || priv->surprise_removed) {
 303                 BT_ERR("event_hs_wait_q terminated (%d): %d,%d,%d",
 304                        ret, adapter->hs_state, adapter->ps_state,
 305                        adapter->wakeup_tries);
 306         } else if (!ret) {
 307                 BT_ERR("hs_enable timeout: %d,%d,%d", adapter->hs_state,
 308                        adapter->ps_state, adapter->wakeup_tries);
 309                 ret = -ETIMEDOUT;
 310         } else {
 311                 BT_DBG("host sleep enabled: %d,%d,%d", adapter->hs_state,
 312                        adapter->ps_state, adapter->wakeup_tries);
 313                 ret = 0;
 314         }
 315
 316         return ret;
 317 }
 318 EXPORT_SYMBOL_GPL(btmrvl_enable_hs);
 319
 320 int btmrvl_prepare_command(struct btmrvl_private *priv)
 321 {
 322         int ret = 0;
 323
 324         if (priv->btmrvl_dev.hscfgcmd) {
 325                 priv->btmrvl_dev.hscfgcmd = 0;
 326                 btmrvl_send_hscfg_cmd(priv);
 327         }
 328
 329         if (priv->btmrvl_dev.pscmd) {
 330                 priv->btmrvl_dev.pscmd = 0;
 331                 btmrvl_enable_ps(priv);
 332         }
 333
 334         if (priv->btmrvl_dev.hscmd) {
 335                 priv->btmrvl_dev.hscmd = 0;
 336
 337                 if (priv->btmrvl_dev.hsmode) {
 338                         ret = btmrvl_enable_hs(priv);
 339                 } else {
 340                         ret = priv->hw_wakeup_firmware(priv);
 341                         priv->adapter->hs_state = HS_DEACTIVATED;
 342                         BT_DBG("BT: HS DEACTIVATED due to host activity!");
 343                 }
 344         }
 345
 346         return ret;
 347 }
 348
 349 void btmrvl_firmware_dump(struct btmrvl_private *priv)
 350 {
 351         if (priv->firmware_dump)
 352                 priv->firmware_dump(priv);
 353 }
 354
 355 static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb)
 356 {
 357         int ret = 0;
 358
 359         if (!skb || !skb->data)
 360                 return -EINVAL;
 361
 362         if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) {
 363                 BT_ERR("Tx Error: Bad skb length %d : %d",
 364                                                 skb->len, BTM_UPLD_SIZE);
 365                 return -EINVAL;
 366         }
 367
 368         if (skb_headroom(skb) < BTM_HEADER_LEN) {
 369                 struct sk_buff *tmp = skb;
 370
 371                 skb = skb_realloc_headroom(skb, BTM_HEADER_LEN);
 372                 if (!skb) {
 373                         BT_ERR("Tx Error: realloc_headroom failed %d",
 374                                 BTM_HEADER_LEN);
 375                         skb = tmp;
 376                         return -EINVAL;
 377                 }
 378
 379                 kfree_skb(tmp);
 380         }
 381
 382         skb_push(skb, BTM_HEADER_LEN);
 383
 384         /* header type: byte[3]
 385          * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor
 386          * header length: byte[2][1][0]
 387          */
 388
 389         skb->data[0] = (skb->len & 0x0000ff);
 390         skb->data[1] = (skb->len & 0x00ff00) >> 8;
 391         skb->data[2] = (skb->len & 0xff0000) >> 16;
 392         skb->data[3] = bt_cb(skb)->pkt_type;
 393
 394         if (priv->hw_host_to_card)
 395                 ret = priv->hw_host_to_card(priv, skb->data, skb->len);
 396
 397         return ret;
 398 }
 399
 400 static void btmrvl_init_adapter(struct btmrvl_private *priv)
 401 {
 402         int buf_size;
 403
 404         skb_queue_head_init(&priv->adapter->tx_queue);
 405
 406         priv->adapter->ps_state = PS_AWAKE;
 407
 408         buf_size = ALIGN_SZ(SDIO_BLOCK_SIZE, BTSDIO_DMA_ALIGN);
 409         priv->adapter->hw_regs_buf = kzalloc(buf_size, GFP_KERNEL);
 410         if (!priv->adapter->hw_regs_buf) {
 411                 priv->adapter->hw_regs = NULL;
 412                 BT_ERR("Unable to allocate buffer for hw_regs.");
 413         } else {
 414                 priv->adapter->hw_regs =
 415                         (u8 *)ALIGN_ADDR(priv->adapter->hw_regs_buf,
 416                                          BTSDIO_DMA_ALIGN);
 417                 BT_DBG("hw_regs_buf=%p hw_regs=%p",
 418                        priv->adapter->hw_regs_buf, priv->adapter->hw_regs);
 419         }
 420
 421         init_waitqueue_head(&priv->adapter->cmd_wait_q);
 422         init_waitqueue_head(&priv->adapter->event_hs_wait_q);
 423 }
 424
 425 static void btmrvl_free_adapter(struct btmrvl_private *priv)
 426 {
 427         skb_queue_purge(&priv->adapter->tx_queue);
 428
 429         kfree(priv->adapter->hw_regs_buf);
 430         kfree(priv->adapter);
 431
 432         priv->adapter = NULL;
 433 }
 434
 435 static int btmrvl_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
 436 {
 437         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 438
 439         BT_DBG("type=%d, len=%d", skb->pkt_type, skb->len);
 440
 441         if (!test_bit(HCI_RUNNING, &hdev->flags)) {
 442                 BT_ERR("Failed testing HCI_RUNING, flags=%lx", hdev->flags);
 443                 print_hex_dump_bytes("data: ", DUMP_PREFIX_OFFSET,
 444                                                         skb->data, skb->len);
 445                 return -EBUSY;
 446         }
 447
 448         switch (bt_cb(skb)->pkt_type) {
 449         case HCI_COMMAND_PKT:
 450                 hdev->stat.cmd_tx++;
 451                 break;
 452
 453         case HCI_ACLDATA_PKT:
 454                 hdev->stat.acl_tx++;
 455                 break;
 456
 457         case HCI_SCODATA_PKT:
 458                 hdev->stat.sco_tx++;
 459                 break;
 460         }
 461
 462         skb_queue_tail(&priv->adapter->tx_queue, skb);
 463
 464         wake_up_interruptible(&priv->main_thread.wait_q);
 465
 466         return 0;
 467 }
 468
 469 static int btmrvl_flush(struct hci_dev *hdev)
 470 {
 471         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 472
 473         skb_queue_purge(&priv->adapter->tx_queue);
 474
 475         return 0;
 476 }
 477
 478 static int btmrvl_close(struct hci_dev *hdev)
 479 {
 480         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 481
 482         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 483                 return 0;
 484
 485         skb_queue_purge(&priv->adapter->tx_queue);
 486
 487         return 0;
 488 }
 489
 490 static int btmrvl_open(struct hci_dev *hdev)
 491 {
 492         set_bit(HCI_RUNNING, &hdev->flags);
 493
 494         return 0;
 495 }
 496
 497 static int btmrvl_download_cal_data(struct btmrvl_private *priv,
 498                                     u8 *data, int len)
 499 {
 500         int ret;
 501
 502         data[0] = 0x00;
 503         data[1] = 0x00;
 504         data[2] = 0x00;
 505         data[3] = len;
 506
 507         print_hex_dump_bytes("Calibration data: ",
 508                              DUMP_PREFIX_OFFSET, data, BT_CAL_HDR_LEN + len);
 509
 510         ret = btmrvl_send_sync_cmd(priv, BT_CMD_LOAD_CONFIG_DATA, data,
 511                                    BT_CAL_HDR_LEN + len);
 512         if (ret)
 513                 BT_ERR("Failed to download caibration data");
 514
 515         return 0;
 516 }
 517
 518 static int btmrvl_check_device_tree(struct btmrvl_private *priv)
 519 {
 520         struct device_node *dt_node;
 521         u8 cal_data[BT_CAL_HDR_LEN + BT_CAL_DATA_SIZE];
 522         int ret;
 523         u32 val;
 524
 525         for_each_compatible_node(dt_node, NULL, "btmrvl,cfgdata") {
 526                 ret = of_property_read_u32(dt_node, "btmrvl,gpio-gap", &val);
 527                 if (!ret)
 528                         priv->btmrvl_dev.gpio_gap = val;
 529
 530                 ret = of_property_read_u8_array(dt_node, "btmrvl,cal-data",
 531                                                 cal_data + BT_CAL_HDR_LEN,
 532                                                 BT_CAL_DATA_SIZE);
 533                 if (ret)
 534                         return ret;
 535
 536                 BT_DBG("Use cal data from device tree");
 537                 ret = btmrvl_download_cal_data(priv, cal_data,
 538                                                BT_CAL_DATA_SIZE);
 539                 if (ret) {
 540                         BT_ERR("Fail to download calibrate data");
 541                         return ret;
 542                 }
 543         }
 544
 545         return 0;
 546 }
 547
 548 static int btmrvl_setup(struct hci_dev *hdev)
 549 {
 550         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 551         int ret;
 552
 553         ret = btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
 554         if (ret)
 555                 return ret;
 556
 557         priv->btmrvl_dev.gpio_gap = 0xffff;
 558
 559         btmrvl_check_device_tree(priv);
 560
 561         btmrvl_pscan_window_reporting(priv, 0x01);
 562
 563         priv->btmrvl_dev.psmode = 1;
 564         btmrvl_enable_ps(priv);
 565
 566         btmrvl_send_hscfg_cmd(priv);
 567
 568         return 0;
 569 }
 570
 571 static int btmrvl_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
 572 {
 573         struct sk_buff *skb;
 574         long ret;
 575         u8 buf[8];
 576
 577         buf[0] = MRVL_VENDOR_PKT;
 578         buf[1] = sizeof(bdaddr_t);
 579         memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
 580
 581         skb = __hci_cmd_sync(hdev, BT_CMD_SET_BDADDR, sizeof(buf), buf,
 582                              HCI_INIT_TIMEOUT);
 583         if (IS_ERR(skb)) {
 584                 ret = PTR_ERR(skb);
 585                 BT_ERR("%s: changing btmrvl device address failed (%ld)",
 586                        hdev->name, ret);
 587                 return ret;
 588         }
 589         kfree_skb(skb);
 590
 591         return 0;
 592 }
 593
 594 /*
 595  * This function handles the event generated by firmware, rx data
 596  * received from firmware, and tx data sent from kernel.
 597  */
 598 static int btmrvl_service_main_thread(void *data)
 599 {
 600         struct btmrvl_thread *thread = data;
 601         struct btmrvl_private *priv = thread->priv;
 602         struct btmrvl_adapter *adapter = priv->adapter;
 603         wait_queue_t wait;
 604         struct sk_buff *skb;
 605         ulong flags;
 606
 607         init_waitqueue_entry(&wait, current);
 608
 609         for (;;) {
 610                 add_wait_queue(&thread->wait_q, &wait);
 611
 612                 set_current_state(TASK_INTERRUPTIBLE);
 613                 if (kthread_should_stop() || priv->surprise_removed) {
 614                         BT_DBG("main_thread: break from main thread");
 615                         break;
 616                 }
 617
 618                 if (adapter->wakeup_tries ||
 619                                 ((!adapter->int_count) &&
 620                                 (!priv->btmrvl_dev.tx_dnld_rdy ||
 621                                 skb_queue_empty(&adapter->tx_queue)))) {
 622                         BT_DBG("main_thread is sleeping...");
 623                         schedule();
 624                 }
 625
 626                 set_current_state(TASK_RUNNING);
 627
 628                 remove_wait_queue(&thread->wait_q, &wait);
 629
 630                 BT_DBG("main_thread woke up");
 631
 632                 if (kthread_should_stop() || priv->surprise_removed) {
 633                         BT_DBG("main_thread: break from main thread");
 634                         break;
 635                 }
 636
 637                 spin_lock_irqsave(&priv->driver_lock, flags);
 638                 if (adapter->int_count) {
 639                         adapter->int_count = 0;
 640                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 641                         priv->hw_process_int_status(priv);
 642                 } else if (adapter->ps_state == PS_SLEEP &&
 643                                         !skb_queue_empty(&adapter->tx_queue)) {
 644                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 645                         adapter->wakeup_tries++;
 646                         priv->hw_wakeup_firmware(priv);
 647                         continue;
 648                 } else {
 649                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 650                 }
 651
 652                 if (adapter->ps_state == PS_SLEEP)
 653                         continue;
 654
 655                 if (!priv->btmrvl_dev.tx_dnld_rdy)
 656                         continue;
 657
 658                 skb = skb_dequeue(&adapter->tx_queue);
 659                 if (skb) {
 660                         if (btmrvl_tx_pkt(priv, skb))
 661                                 priv->btmrvl_dev.hcidev->stat.err_tx++;
 662                         else
 663                                 priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len;
 664
 665                         kfree_skb(skb);
 666                 }
 667         }
 668
 669         return 0;
 670 }
 671
 672 int btmrvl_register_hdev(struct btmrvl_private *priv)
 673 {
 674         struct hci_dev *hdev = NULL;
 675         int ret;
 676
 677         hdev = hci_alloc_dev();
 678         if (!hdev) {
 679                 BT_ERR("Can not allocate HCI device");
 680                 goto err_hdev;
 681         }
 682
 683         priv->btmrvl_dev.hcidev = hdev;
 684         hci_set_drvdata(hdev, priv);
 685
 686         hdev->bus   = HCI_SDIO;
 687         hdev->open  = btmrvl_open;
 688         hdev->close = btmrvl_close;
 689         hdev->flush = btmrvl_flush;
 690         hdev->send  = btmrvl_send_frame;
 691         hdev->setup = btmrvl_setup;
 692         hdev->set_bdaddr = btmrvl_set_bdaddr;
 693
 694         hdev->dev_type = priv->btmrvl_dev.dev_type;
 695
 696         ret = hci_register_dev(hdev);
 697         if (ret < 0) {
 698                 BT_ERR("Can not register HCI device");
 699                 goto err_hci_register_dev;
 700         }
 701
 702 #ifdef CONFIG_DEBUG_FS
 703         btmrvl_debugfs_init(hdev);
 704 #endif
 705
 706         return 0;
 707
 708 err_hci_register_dev:
 709         hci_free_dev(hdev);
 710
 711 err_hdev:
 712         /* Stop the thread servicing the interrupts */
 713         kthread_stop(priv->main_thread.task);
 714
 715         btmrvl_free_adapter(priv);
 716         kfree(priv);
 717
 718         return -ENOMEM;
 719 }
 720 EXPORT_SYMBOL_GPL(btmrvl_register_hdev);
 721
 722 struct btmrvl_private *btmrvl_add_card(void *card)
 723 {
 724         struct btmrvl_private *priv;
 725
 726         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 727         if (!priv) {
 728                 BT_ERR("Can not allocate priv");
 729                 goto err_priv;
 730         }
 731
 732         priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL);
 733         if (!priv->adapter) {
 734                 BT_ERR("Allocate buffer for btmrvl_adapter failed!");
 735                 goto err_adapter;
 736         }
 737
 738         btmrvl_init_adapter(priv);
 739
 740         BT_DBG("Starting kthread...");
 741         priv->main_thread.priv = priv;
 742         spin_lock_init(&priv->driver_lock);
 743
 744         init_waitqueue_head(&priv->main_thread.wait_q);
 745         priv->main_thread.task = kthread_run(btmrvl_service_main_thread,
 746                                 &priv->main_thread, "btmrvl_main_service");
 747         if (IS_ERR(priv->main_thread.task))
 748                 goto err_thread;
 749
 750         priv->btmrvl_dev.card = card;
 751         priv->btmrvl_dev.tx_dnld_rdy = true;
 752
 753         return priv;
 754
 755 err_thread:
 756         btmrvl_free_adapter(priv);
 757
 758 err_adapter:
 759         kfree(priv);
 760
 761 err_priv:
 762         return NULL;
 763 }
 764 EXPORT_SYMBOL_GPL(btmrvl_add_card);
 765
 766 int btmrvl_remove_card(struct btmrvl_private *priv)
 767 {
 768         struct hci_dev *hdev;
 769
 770         hdev = priv->btmrvl_dev.hcidev;
 771
 772         wake_up_interruptible(&priv->adapter->cmd_wait_q);
 773         wake_up_interruptible(&priv->adapter->event_hs_wait_q);
 774
 775         kthread_stop(priv->main_thread.task);
 776
 777 #ifdef CONFIG_DEBUG_FS
 778         btmrvl_debugfs_remove(hdev);
 779 #endif
 780
 781         hci_unregister_dev(hdev);
 782
 783         hci_free_dev(hdev);
 784
 785         priv->btmrvl_dev.hcidev = NULL;
 786
 787         btmrvl_free_adapter(priv);
 788
 789         kfree(priv);
 790
 791         return 0;
 792 }
 793 EXPORT_SYMBOL_GPL(btmrvl_remove_card);
 794
 795 MODULE_AUTHOR("Marvell International Ltd.");
 796 MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION);
 797 MODULE_VERSION(VERSION);
 798 MODULE_LICENSE("GPL v2");