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 static int btmrvl_enable_sco_routing_to_host(struct btmrvl_private *priv)
 234 {
 235         int ret;
 236         u8 subcmd = 0;
 237
 238         ret = btmrvl_send_sync_cmd(priv, BT_CMD_ROUTE_SCO_TO_HOST, &subcmd, 1);
 239         if (ret)
 240                 BT_ERR("BT_CMD_ROUTE_SCO_TO_HOST command failed: %#x", ret);
 241
 242         return ret;
 243 }
 244
 245 int btmrvl_pscan_window_reporting(struct btmrvl_private *priv, u8 subcmd)
 246 {
 247         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 248         int ret;
 249
 250         if (!card->support_pscan_win_report)
 251                 return 0;
 252
 253         ret = btmrvl_send_sync_cmd(priv, BT_CMD_PSCAN_WIN_REPORT_ENABLE,
 254                                    &subcmd, 1);
 255         if (ret)
 256                 BT_ERR("PSCAN_WIN_REPORT_ENABLE command failed: %#x", ret);
 257
 258         return ret;
 259 }
 260 EXPORT_SYMBOL_GPL(btmrvl_pscan_window_reporting);
 261
 262 int btmrvl_send_hscfg_cmd(struct btmrvl_private *priv)
 263 {
 264         int ret;
 265         u8 param[2];
 266
 267         param[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
 268         param[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff);
 269
 270         BT_DBG("Sending HSCFG Command, gpio=0x%x, gap=0x%x",
 271                param[0], param[1]);
 272
 273         ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_CONFIG, param, 2);
 274         if (ret)
 275                 BT_ERR("HSCFG command failed");
 276
 277         return ret;
 278 }
 279 EXPORT_SYMBOL_GPL(btmrvl_send_hscfg_cmd);
 280
 281 int btmrvl_enable_ps(struct btmrvl_private *priv)
 282 {
 283         int ret;
 284         u8 param;
 285
 286         if (priv->btmrvl_dev.psmode)
 287                 param = BT_PS_ENABLE;
 288         else
 289                 param = BT_PS_DISABLE;
 290
 291         ret = btmrvl_send_sync_cmd(priv, BT_CMD_AUTO_SLEEP_MODE, &param, 1);
 292         if (ret)
 293                 BT_ERR("PSMODE command failed");
 294
 295         return 0;
 296 }
 297 EXPORT_SYMBOL_GPL(btmrvl_enable_ps);
 298
 299 int btmrvl_enable_hs(struct btmrvl_private *priv)
 300 {
 301         struct btmrvl_adapter *adapter = priv->adapter;
 302         int ret;
 303
 304         ret = btmrvl_send_sync_cmd(priv, BT_CMD_HOST_SLEEP_ENABLE, NULL, 0);
 305         if (ret) {
 306                 BT_ERR("Host sleep enable command failed");
 307                 return ret;
 308         }
 309
 310         ret = wait_event_interruptible_timeout(adapter->event_hs_wait_q,
 311                                                adapter->hs_state ||
 312                                                priv->surprise_removed,
 313                                                WAIT_UNTIL_HS_STATE_CHANGED);
 314         if (ret < 0 || priv->surprise_removed) {
 315                 BT_ERR("event_hs_wait_q terminated (%d): %d,%d,%d",
 316                        ret, adapter->hs_state, adapter->ps_state,
 317                        adapter->wakeup_tries);
 318         } else if (!ret) {
 319                 BT_ERR("hs_enable timeout: %d,%d,%d", adapter->hs_state,
 320                        adapter->ps_state, adapter->wakeup_tries);
 321                 ret = -ETIMEDOUT;
 322         } else {
 323                 BT_DBG("host sleep enabled: %d,%d,%d", adapter->hs_state,
 324                        adapter->ps_state, adapter->wakeup_tries);
 325                 ret = 0;
 326         }
 327
 328         return ret;
 329 }
 330 EXPORT_SYMBOL_GPL(btmrvl_enable_hs);
 331
 332 int btmrvl_prepare_command(struct btmrvl_private *priv)
 333 {
 334         int ret = 0;
 335
 336         if (priv->btmrvl_dev.hscfgcmd) {
 337                 priv->btmrvl_dev.hscfgcmd = 0;
 338                 btmrvl_send_hscfg_cmd(priv);
 339         }
 340
 341         if (priv->btmrvl_dev.pscmd) {
 342                 priv->btmrvl_dev.pscmd = 0;
 343                 btmrvl_enable_ps(priv);
 344         }
 345
 346         if (priv->btmrvl_dev.hscmd) {
 347                 priv->btmrvl_dev.hscmd = 0;
 348
 349                 if (priv->btmrvl_dev.hsmode) {
 350                         ret = btmrvl_enable_hs(priv);
 351                 } else {
 352                         ret = priv->hw_wakeup_firmware(priv);
 353                         priv->adapter->hs_state = HS_DEACTIVATED;
 354                         BT_DBG("BT: HS DEACTIVATED due to host activity!");
 355                 }
 356         }
 357
 358         return ret;
 359 }
 360
 361 void btmrvl_firmware_dump(struct btmrvl_private *priv)
 362 {
 363         if (priv->firmware_dump)
 364                 priv->firmware_dump(priv);
 365 }
 366
 367 static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb)
 368 {
 369         int ret = 0;
 370
 371         if (!skb || !skb->data)
 372                 return -EINVAL;
 373
 374         if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) {
 375                 BT_ERR("Tx Error: Bad skb length %d : %d",
 376                                                 skb->len, BTM_UPLD_SIZE);
 377                 return -EINVAL;
 378         }
 379
 380         if (skb_headroom(skb) < BTM_HEADER_LEN) {
 381                 struct sk_buff *tmp = skb;
 382
 383                 skb = skb_realloc_headroom(skb, BTM_HEADER_LEN);
 384                 if (!skb) {
 385                         BT_ERR("Tx Error: realloc_headroom failed %d",
 386                                 BTM_HEADER_LEN);
 387                         skb = tmp;
 388                         return -EINVAL;
 389                 }
 390
 391                 kfree_skb(tmp);
 392         }
 393
 394         skb_push(skb, BTM_HEADER_LEN);
 395
 396         /* header type: byte[3]
 397          * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor
 398          * header length: byte[2][1][0]
 399          */
 400
 401         skb->data[0] = (skb->len & 0x0000ff);
 402         skb->data[1] = (skb->len & 0x00ff00) >> 8;
 403         skb->data[2] = (skb->len & 0xff0000) >> 16;
 404         skb->data[3] = bt_cb(skb)->pkt_type;
 405
 406         if (priv->hw_host_to_card)
 407                 ret = priv->hw_host_to_card(priv, skb->data, skb->len);
 408
 409         return ret;
 410 }
 411
 412 static void btmrvl_init_adapter(struct btmrvl_private *priv)
 413 {
 414         int buf_size;
 415
 416         skb_queue_head_init(&priv->adapter->tx_queue);
 417
 418         priv->adapter->ps_state = PS_AWAKE;
 419
 420         buf_size = ALIGN_SZ(SDIO_BLOCK_SIZE, BTSDIO_DMA_ALIGN);
 421         priv->adapter->hw_regs_buf = kzalloc(buf_size, GFP_KERNEL);
 422         if (!priv->adapter->hw_regs_buf) {
 423                 priv->adapter->hw_regs = NULL;
 424                 BT_ERR("Unable to allocate buffer for hw_regs.");
 425         } else {
 426                 priv->adapter->hw_regs =
 427                         (u8 *)ALIGN_ADDR(priv->adapter->hw_regs_buf,
 428                                          BTSDIO_DMA_ALIGN);
 429                 BT_DBG("hw_regs_buf=%p hw_regs=%p",
 430                        priv->adapter->hw_regs_buf, priv->adapter->hw_regs);
 431         }
 432
 433         init_waitqueue_head(&priv->adapter->cmd_wait_q);
 434         init_waitqueue_head(&priv->adapter->event_hs_wait_q);
 435 }
 436
 437 static void btmrvl_free_adapter(struct btmrvl_private *priv)
 438 {
 439         skb_queue_purge(&priv->adapter->tx_queue);
 440
 441         kfree(priv->adapter->hw_regs_buf);
 442         kfree(priv->adapter);
 443
 444         priv->adapter = NULL;
 445 }
 446
 447 static int btmrvl_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
 448 {
 449         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 450
 451         BT_DBG("type=%d, len=%d", skb->pkt_type, skb->len);
 452
 453         if (!test_bit(HCI_RUNNING, &hdev->flags)) {
 454                 BT_ERR("Failed testing HCI_RUNING, flags=%lx", hdev->flags);
 455                 print_hex_dump_bytes("data: ", DUMP_PREFIX_OFFSET,
 456                                                         skb->data, skb->len);
 457                 return -EBUSY;
 458         }
 459
 460         switch (bt_cb(skb)->pkt_type) {
 461         case HCI_COMMAND_PKT:
 462                 hdev->stat.cmd_tx++;
 463                 break;
 464
 465         case HCI_ACLDATA_PKT:
 466                 hdev->stat.acl_tx++;
 467                 break;
 468
 469         case HCI_SCODATA_PKT:
 470                 hdev->stat.sco_tx++;
 471                 break;
 472         }
 473
 474         skb_queue_tail(&priv->adapter->tx_queue, skb);
 475
 476         wake_up_interruptible(&priv->main_thread.wait_q);
 477
 478         return 0;
 479 }
 480
 481 static int btmrvl_flush(struct hci_dev *hdev)
 482 {
 483         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 484
 485         skb_queue_purge(&priv->adapter->tx_queue);
 486
 487         return 0;
 488 }
 489
 490 static int btmrvl_close(struct hci_dev *hdev)
 491 {
 492         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 493
 494         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 495                 return 0;
 496
 497         skb_queue_purge(&priv->adapter->tx_queue);
 498
 499         return 0;
 500 }
 501
 502 static int btmrvl_open(struct hci_dev *hdev)
 503 {
 504         set_bit(HCI_RUNNING, &hdev->flags);
 505
 506         return 0;
 507 }
 508
 509 static int btmrvl_download_cal_data(struct btmrvl_private *priv,
 510                                     u8 *data, int len)
 511 {
 512         int ret;
 513
 514         data[0] = 0x00;
 515         data[1] = 0x00;
 516         data[2] = 0x00;
 517         data[3] = len;
 518
 519         print_hex_dump_bytes("Calibration data: ",
 520                              DUMP_PREFIX_OFFSET, data, BT_CAL_HDR_LEN + len);
 521
 522         ret = btmrvl_send_sync_cmd(priv, BT_CMD_LOAD_CONFIG_DATA, data,
 523                                    BT_CAL_HDR_LEN + len);
 524         if (ret)
 525                 BT_ERR("Failed to download caibration data");
 526
 527         return 0;
 528 }
 529
 530 static int btmrvl_check_device_tree(struct btmrvl_private *priv)
 531 {
 532         struct device_node *dt_node;
 533         u8 cal_data[BT_CAL_HDR_LEN + BT_CAL_DATA_SIZE];
 534         int ret;
 535         u32 val;
 536
 537         for_each_compatible_node(dt_node, NULL, "btmrvl,cfgdata") {
 538                 ret = of_property_read_u32(dt_node, "btmrvl,gpio-gap", &val);
 539                 if (!ret)
 540                         priv->btmrvl_dev.gpio_gap = val;
 541
 542                 ret = of_property_read_u8_array(dt_node, "btmrvl,cal-data",
 543                                                 cal_data + BT_CAL_HDR_LEN,
 544                                                 BT_CAL_DATA_SIZE);
 545                 if (ret)
 546                         return ret;
 547
 548                 BT_DBG("Use cal data from device tree");
 549                 ret = btmrvl_download_cal_data(priv, cal_data,
 550                                                BT_CAL_DATA_SIZE);
 551                 if (ret) {
 552                         BT_ERR("Fail to download calibrate data");
 553                         return ret;
 554                 }
 555         }
 556
 557         return 0;
 558 }
 559
 560 static int btmrvl_setup(struct hci_dev *hdev)
 561 {
 562         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 563         int ret;
 564
 565         ret = btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
 566         if (ret)
 567                 return ret;
 568
 569         priv->btmrvl_dev.gpio_gap = 0xffff;
 570
 571         btmrvl_check_device_tree(priv);
 572
 573         btmrvl_enable_sco_routing_to_host(priv);
 574
 575         btmrvl_pscan_window_reporting(priv, 0x01);
 576
 577         priv->btmrvl_dev.psmode = 1;
 578         btmrvl_enable_ps(priv);
 579
 580         btmrvl_send_hscfg_cmd(priv);
 581
 582         return 0;
 583 }
 584
 585 static int btmrvl_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
 586 {
 587         struct sk_buff *skb;
 588         long ret;
 589         u8 buf[8];
 590
 591         buf[0] = MRVL_VENDOR_PKT;
 592         buf[1] = sizeof(bdaddr_t);
 593         memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
 594
 595         skb = __hci_cmd_sync(hdev, BT_CMD_SET_BDADDR, sizeof(buf), buf,
 596                              HCI_INIT_TIMEOUT);
 597         if (IS_ERR(skb)) {
 598                 ret = PTR_ERR(skb);
 599                 BT_ERR("%s: changing btmrvl device address failed (%ld)",
 600                        hdev->name, ret);
 601                 return ret;
 602         }
 603         kfree_skb(skb);
 604
 605         return 0;
 606 }
 607
 608 /*
 609  * This function handles the event generated by firmware, rx data
 610  * received from firmware, and tx data sent from kernel.
 611  */
 612 static int btmrvl_service_main_thread(void *data)
 613 {
 614         struct btmrvl_thread *thread = data;
 615         struct btmrvl_private *priv = thread->priv;
 616         struct btmrvl_adapter *adapter = priv->adapter;
 617         wait_queue_t wait;
 618         struct sk_buff *skb;
 619         ulong flags;
 620
 621         init_waitqueue_entry(&wait, current);
 622
 623         for (;;) {
 624                 add_wait_queue(&thread->wait_q, &wait);
 625
 626                 set_current_state(TASK_INTERRUPTIBLE);
 627                 if (kthread_should_stop() || priv->surprise_removed) {
 628                         BT_DBG("main_thread: break from main thread");
 629                         break;
 630                 }
 631
 632                 if (adapter->wakeup_tries ||
 633                                 ((!adapter->int_count) &&
 634                                 (!priv->btmrvl_dev.tx_dnld_rdy ||
 635                                 skb_queue_empty(&adapter->tx_queue)))) {
 636                         BT_DBG("main_thread is sleeping...");
 637                         schedule();
 638                 }
 639
 640                 set_current_state(TASK_RUNNING);
 641
 642                 remove_wait_queue(&thread->wait_q, &wait);
 643
 644                 BT_DBG("main_thread woke up");
 645
 646                 if (kthread_should_stop() || priv->surprise_removed) {
 647                         BT_DBG("main_thread: break from main thread");
 648                         break;
 649                 }
 650
 651                 spin_lock_irqsave(&priv->driver_lock, flags);
 652                 if (adapter->int_count) {
 653                         adapter->int_count = 0;
 654                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 655                         priv->hw_process_int_status(priv);
 656                 } else if (adapter->ps_state == PS_SLEEP &&
 657                                         !skb_queue_empty(&adapter->tx_queue)) {
 658                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 659                         adapter->wakeup_tries++;
 660                         priv->hw_wakeup_firmware(priv);
 661                         continue;
 662                 } else {
 663                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 664                 }
 665
 666                 if (adapter->ps_state == PS_SLEEP)
 667                         continue;
 668
 669                 if (!priv->btmrvl_dev.tx_dnld_rdy)
 670                         continue;
 671
 672                 skb = skb_dequeue(&adapter->tx_queue);
 673                 if (skb) {
 674                         if (btmrvl_tx_pkt(priv, skb))
 675                                 priv->btmrvl_dev.hcidev->stat.err_tx++;
 676                         else
 677                                 priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len;
 678
 679                         kfree_skb(skb);
 680                 }
 681         }
 682
 683         return 0;
 684 }
 685
 686 int btmrvl_register_hdev(struct btmrvl_private *priv)
 687 {
 688         struct hci_dev *hdev = NULL;
 689         int ret;
 690
 691         hdev = hci_alloc_dev();
 692         if (!hdev) {
 693                 BT_ERR("Can not allocate HCI device");
 694                 goto err_hdev;
 695         }
 696
 697         priv->btmrvl_dev.hcidev = hdev;
 698         hci_set_drvdata(hdev, priv);
 699
 700         hdev->bus   = HCI_SDIO;
 701         hdev->open  = btmrvl_open;
 702         hdev->close = btmrvl_close;
 703         hdev->flush = btmrvl_flush;
 704         hdev->send  = btmrvl_send_frame;
 705         hdev->setup = btmrvl_setup;
 706         hdev->set_bdaddr = btmrvl_set_bdaddr;
 707
 708         hdev->dev_type = priv->btmrvl_dev.dev_type;
 709
 710         ret = hci_register_dev(hdev);
 711         if (ret < 0) {
 712                 BT_ERR("Can not register HCI device");
 713                 goto err_hci_register_dev;
 714         }
 715
 716 #ifdef CONFIG_DEBUG_FS
 717         btmrvl_debugfs_init(hdev);
 718 #endif
 719
 720         return 0;
 721
 722 err_hci_register_dev:
 723         hci_free_dev(hdev);
 724
 725 err_hdev:
 726         /* Stop the thread servicing the interrupts */
 727         kthread_stop(priv->main_thread.task);
 728
 729         btmrvl_free_adapter(priv);
 730         kfree(priv);
 731
 732         return -ENOMEM;
 733 }
 734 EXPORT_SYMBOL_GPL(btmrvl_register_hdev);
 735
 736 struct btmrvl_private *btmrvl_add_card(void *card)
 737 {
 738         struct btmrvl_private *priv;
 739
 740         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 741         if (!priv) {
 742                 BT_ERR("Can not allocate priv");
 743                 goto err_priv;
 744         }
 745
 746         priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL);
 747         if (!priv->adapter) {
 748                 BT_ERR("Allocate buffer for btmrvl_adapter failed!");
 749                 goto err_adapter;
 750         }
 751
 752         btmrvl_init_adapter(priv);
 753
 754         BT_DBG("Starting kthread...");
 755         priv->main_thread.priv = priv;
 756         spin_lock_init(&priv->driver_lock);
 757
 758         init_waitqueue_head(&priv->main_thread.wait_q);
 759         priv->main_thread.task = kthread_run(btmrvl_service_main_thread,
 760                                 &priv->main_thread, "btmrvl_main_service");
 761         if (IS_ERR(priv->main_thread.task))
 762                 goto err_thread;
 763
 764         priv->btmrvl_dev.card = card;
 765         priv->btmrvl_dev.tx_dnld_rdy = true;
 766
 767         return priv;
 768
 769 err_thread:
 770         btmrvl_free_adapter(priv);
 771
 772 err_adapter:
 773         kfree(priv);
 774
 775 err_priv:
 776         return NULL;
 777 }
 778 EXPORT_SYMBOL_GPL(btmrvl_add_card);
 779
 780 int btmrvl_remove_card(struct btmrvl_private *priv)
 781 {
 782         struct hci_dev *hdev;
 783
 784         hdev = priv->btmrvl_dev.hcidev;
 785
 786         wake_up_interruptible(&priv->adapter->cmd_wait_q);
 787         wake_up_interruptible(&priv->adapter->event_hs_wait_q);
 788
 789         kthread_stop(priv->main_thread.task);
 790
 791 #ifdef CONFIG_DEBUG_FS
 792         btmrvl_debugfs_remove(hdev);
 793 #endif
 794
 795         hci_unregister_dev(hdev);
 796
 797         hci_free_dev(hdev);
 798
 799         priv->btmrvl_dev.hcidev = NULL;
 800
 801         btmrvl_free_adapter(priv);
 802
 803         kfree(priv);
 804
 805         return 0;
 806 }
 807 EXPORT_SYMBOL_GPL(btmrvl_remove_card);
 808
 809 MODULE_AUTHOR("Marvell International Ltd.");
 810 MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION);
 811 MODULE_VERSION(VERSION);
 812 MODULE_LICENSE("GPL v2");