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_PRIMARY;
 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) {
 188                 BT_ERR("No free skb");
 189                 return -ENOMEM;
 190         }
 191
 192         hdr = skb_put(skb, HCI_COMMAND_HDR_SIZE);
 193         hdr->opcode = cpu_to_le16(opcode);
 194         hdr->plen = len;
 195
 196         if (len)
 197                 skb_put_data(skb, param, len);
 198
 199         hci_skb_pkt_type(skb) = 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         skb_push(skb, BTM_HEADER_LEN);
 381
 382         /* header type: byte[3]
 383          * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor
 384          * header length: byte[2][1][0]
 385          */
 386
 387         skb->data[0] = (skb->len & 0x0000ff);
 388         skb->data[1] = (skb->len & 0x00ff00) >> 8;
 389         skb->data[2] = (skb->len & 0xff0000) >> 16;
 390         skb->data[3] = hci_skb_pkt_type(skb);
 391
 392         if (priv->hw_host_to_card)
 393                 ret = priv->hw_host_to_card(priv, skb->data, skb->len);
 394
 395         return ret;
 396 }
 397
 398 static void btmrvl_init_adapter(struct btmrvl_private *priv)
 399 {
 400         int buf_size;
 401
 402         skb_queue_head_init(&priv->adapter->tx_queue);
 403
 404         priv->adapter->ps_state = PS_AWAKE;
 405
 406         buf_size = ALIGN_SZ(SDIO_BLOCK_SIZE, BTSDIO_DMA_ALIGN);
 407         priv->adapter->hw_regs_buf = kzalloc(buf_size, GFP_KERNEL);
 408         if (!priv->adapter->hw_regs_buf) {
 409                 priv->adapter->hw_regs = NULL;
 410                 BT_ERR("Unable to allocate buffer for hw_regs.");
 411         } else {
 412                 priv->adapter->hw_regs =
 413                         (u8 *)ALIGN_ADDR(priv->adapter->hw_regs_buf,
 414                                          BTSDIO_DMA_ALIGN);
 415                 BT_DBG("hw_regs_buf=%p hw_regs=%p",
 416                        priv->adapter->hw_regs_buf, priv->adapter->hw_regs);
 417         }
 418
 419         init_waitqueue_head(&priv->adapter->cmd_wait_q);
 420         init_waitqueue_head(&priv->adapter->event_hs_wait_q);
 421 }
 422
 423 static void btmrvl_free_adapter(struct btmrvl_private *priv)
 424 {
 425         skb_queue_purge(&priv->adapter->tx_queue);
 426
 427         kfree(priv->adapter->hw_regs_buf);
 428         kfree(priv->adapter);
 429
 430         priv->adapter = NULL;
 431 }
 432
 433 static int btmrvl_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
 434 {
 435         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 436
 437         BT_DBG("type=%d, len=%d", hci_skb_pkt_type(skb), skb->len);
 438
 439         if (priv->adapter->is_suspending || priv->adapter->is_suspended) {
 440                 BT_ERR("%s: Device is suspending or suspended", __func__);
 441                 return -EBUSY;
 442         }
 443
 444         switch (hci_skb_pkt_type(skb)) {
 445         case HCI_COMMAND_PKT:
 446                 hdev->stat.cmd_tx++;
 447                 break;
 448
 449         case HCI_ACLDATA_PKT:
 450                 hdev->stat.acl_tx++;
 451                 break;
 452
 453         case HCI_SCODATA_PKT:
 454                 hdev->stat.sco_tx++;
 455                 break;
 456         }
 457
 458         skb_queue_tail(&priv->adapter->tx_queue, skb);
 459
 460         if (!priv->adapter->is_suspended)
 461                 wake_up_interruptible(&priv->main_thread.wait_q);
 462
 463         return 0;
 464 }
 465
 466 static int btmrvl_flush(struct hci_dev *hdev)
 467 {
 468         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 469
 470         skb_queue_purge(&priv->adapter->tx_queue);
 471
 472         return 0;
 473 }
 474
 475 static int btmrvl_close(struct hci_dev *hdev)
 476 {
 477         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 478
 479         skb_queue_purge(&priv->adapter->tx_queue);
 480
 481         return 0;
 482 }
 483
 484 static int btmrvl_open(struct hci_dev *hdev)
 485 {
 486         return 0;
 487 }
 488
 489 static int btmrvl_download_cal_data(struct btmrvl_private *priv,
 490                                     u8 *data, int len)
 491 {
 492         int ret;
 493
 494         data[0] = 0x00;
 495         data[1] = 0x00;
 496         data[2] = 0x00;
 497         data[3] = len;
 498
 499         print_hex_dump_bytes("Calibration data: ",
 500                              DUMP_PREFIX_OFFSET, data, BT_CAL_HDR_LEN + len);
 501
 502         ret = btmrvl_send_sync_cmd(priv, BT_CMD_LOAD_CONFIG_DATA, data,
 503                                    BT_CAL_HDR_LEN + len);
 504         if (ret)
 505                 BT_ERR("Failed to download calibration data");
 506
 507         return 0;
 508 }
 509
 510 static int btmrvl_check_device_tree(struct btmrvl_private *priv)
 511 {
 512         struct device_node *dt_node;
 513         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 514         u8 cal_data[BT_CAL_HDR_LEN + BT_CAL_DATA_SIZE];
 515         int ret = 0;
 516         u16 gpio, gap;
 517
 518         if (card->plt_of_node) {
 519                 dt_node = card->plt_of_node;
 520                 ret = of_property_read_u16(dt_node, "marvell,wakeup-pin",
 521                                            &gpio);
 522                 if (ret)
 523                         gpio = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
 524
 525                 ret = of_property_read_u16(dt_node, "marvell,wakeup-gap-ms",
 526                                            &gap);
 527                 if (ret)
 528                         gap = (u8)(priv->btmrvl_dev.gpio_gap & 0x00ff);
 529
 530                 priv->btmrvl_dev.gpio_gap = (gpio << 8) + gap;
 531
 532                 ret = of_property_read_u8_array(dt_node, "marvell,cal-data",
 533                                                 cal_data + BT_CAL_HDR_LEN,
 534                                                 BT_CAL_DATA_SIZE);
 535                 if (ret)
 536                         return ret;
 537
 538                 BT_DBG("Use cal data from device tree");
 539                 ret = btmrvl_download_cal_data(priv, cal_data,
 540                                                BT_CAL_DATA_SIZE);
 541                 if (ret)
 542                         BT_ERR("Fail to download calibrate data");
 543         }
 544
 545         return ret;
 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 = 0xfffe;
 558
 559         btmrvl_check_device_tree(priv);
 560
 561         btmrvl_enable_sco_routing_to_host(priv);
 562
 563         btmrvl_pscan_window_reporting(priv, 0x01);
 564
 565         priv->btmrvl_dev.psmode = 1;
 566         btmrvl_enable_ps(priv);
 567
 568         btmrvl_send_hscfg_cmd(priv);
 569
 570         return 0;
 571 }
 572
 573 static int btmrvl_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
 574 {
 575         struct sk_buff *skb;
 576         long ret;
 577         u8 buf[8];
 578
 579         buf[0] = MRVL_VENDOR_PKT;
 580         buf[1] = sizeof(bdaddr_t);
 581         memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
 582
 583         skb = __hci_cmd_sync(hdev, BT_CMD_SET_BDADDR, sizeof(buf), buf,
 584                              HCI_INIT_TIMEOUT);
 585         if (IS_ERR(skb)) {
 586                 ret = PTR_ERR(skb);
 587                 BT_ERR("%s: changing btmrvl device address failed (%ld)",
 588                        hdev->name, ret);
 589                 return ret;
 590         }
 591         kfree_skb(skb);
 592
 593         return 0;
 594 }
 595
 596 /*
 597  * This function handles the event generated by firmware, rx data
 598  * received from firmware, and tx data sent from kernel.
 599  */
 600 static int btmrvl_service_main_thread(void *data)
 601 {
 602         struct btmrvl_thread *thread = data;
 603         struct btmrvl_private *priv = thread->priv;
 604         struct btmrvl_adapter *adapter = priv->adapter;
 605         wait_queue_entry_t wait;
 606         struct sk_buff *skb;
 607         ulong flags;
 608
 609         init_waitqueue_entry(&wait, current);
 610
 611         for (;;) {
 612                 add_wait_queue(&thread->wait_q, &wait);
 613
 614                 set_current_state(TASK_INTERRUPTIBLE);
 615                 if (kthread_should_stop() || priv->surprise_removed) {
 616                         BT_DBG("main_thread: break from main thread");
 617                         break;
 618                 }
 619
 620                 if (adapter->wakeup_tries ||
 621                                 ((!adapter->int_count) &&
 622                                 (!priv->btmrvl_dev.tx_dnld_rdy ||
 623                                 skb_queue_empty(&adapter->tx_queue)))) {
 624                         BT_DBG("main_thread is sleeping...");
 625                         schedule();
 626                 }
 627
 628                 set_current_state(TASK_RUNNING);
 629
 630                 remove_wait_queue(&thread->wait_q, &wait);
 631
 632                 BT_DBG("main_thread woke up");
 633
 634                 if (kthread_should_stop() || priv->surprise_removed) {
 635                         BT_DBG("main_thread: break from main thread");
 636                         break;
 637                 }
 638
 639                 spin_lock_irqsave(&priv->driver_lock, flags);
 640                 if (adapter->int_count) {
 641                         adapter->int_count = 0;
 642                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 643                         priv->hw_process_int_status(priv);
 644                 } else if (adapter->ps_state == PS_SLEEP &&
 645                                         !skb_queue_empty(&adapter->tx_queue)) {
 646                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 647                         adapter->wakeup_tries++;
 648                         priv->hw_wakeup_firmware(priv);
 649                         continue;
 650                 } else {
 651                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 652                 }
 653
 654                 if (adapter->ps_state == PS_SLEEP)
 655                         continue;
 656
 657                 if (!priv->btmrvl_dev.tx_dnld_rdy ||
 658                     priv->adapter->is_suspended)
 659                         continue;
 660
 661                 skb = skb_dequeue(&adapter->tx_queue);
 662                 if (skb) {
 663                         if (btmrvl_tx_pkt(priv, skb))
 664                                 priv->btmrvl_dev.hcidev->stat.err_tx++;
 665                         else
 666                                 priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len;
 667
 668                         kfree_skb(skb);
 669                 }
 670         }
 671
 672         return 0;
 673 }
 674
 675 int btmrvl_register_hdev(struct btmrvl_private *priv)
 676 {
 677         struct hci_dev *hdev = NULL;
 678         int ret;
 679
 680         hdev = hci_alloc_dev();
 681         if (!hdev) {
 682                 BT_ERR("Can not allocate HCI device");
 683                 goto err_hdev;
 684         }
 685
 686         priv->btmrvl_dev.hcidev = hdev;
 687         hci_set_drvdata(hdev, priv);
 688
 689         hdev->bus   = HCI_SDIO;
 690         hdev->open  = btmrvl_open;
 691         hdev->close = btmrvl_close;
 692         hdev->flush = btmrvl_flush;
 693         hdev->send  = btmrvl_send_frame;
 694         hdev->setup = btmrvl_setup;
 695         hdev->set_bdaddr = btmrvl_set_bdaddr;
 696
 697         hdev->dev_type = priv->btmrvl_dev.dev_type;
 698
 699         ret = hci_register_dev(hdev);
 700         if (ret < 0) {
 701                 BT_ERR("Can not register HCI device");
 702                 goto err_hci_register_dev;
 703         }
 704
 705 #ifdef CONFIG_DEBUG_FS
 706         btmrvl_debugfs_init(hdev);
 707 #endif
 708
 709         return 0;
 710
 711 err_hci_register_dev:
 712         hci_free_dev(hdev);
 713
 714 err_hdev:
 715         /* Stop the thread servicing the interrupts */
 716         kthread_stop(priv->main_thread.task);
 717
 718         btmrvl_free_adapter(priv);
 719         kfree(priv);
 720
 721         return -ENOMEM;
 722 }
 723 EXPORT_SYMBOL_GPL(btmrvl_register_hdev);
 724
 725 struct btmrvl_private *btmrvl_add_card(void *card)
 726 {
 727         struct btmrvl_private *priv;
 728
 729         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 730         if (!priv) {
 731                 BT_ERR("Can not allocate priv");
 732                 goto err_priv;
 733         }
 734
 735         priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL);
 736         if (!priv->adapter) {
 737                 BT_ERR("Allocate buffer for btmrvl_adapter failed!");
 738                 goto err_adapter;
 739         }
 740
 741         btmrvl_init_adapter(priv);
 742
 743         BT_DBG("Starting kthread...");
 744         priv->main_thread.priv = priv;
 745         spin_lock_init(&priv->driver_lock);
 746
 747         init_waitqueue_head(&priv->main_thread.wait_q);
 748         priv->main_thread.task = kthread_run(btmrvl_service_main_thread,
 749                                 &priv->main_thread, "btmrvl_main_service");
 750         if (IS_ERR(priv->main_thread.task))
 751                 goto err_thread;
 752
 753         priv->btmrvl_dev.card = card;
 754         priv->btmrvl_dev.tx_dnld_rdy = true;
 755
 756         return priv;
 757
 758 err_thread:
 759         btmrvl_free_adapter(priv);
 760
 761 err_adapter:
 762         kfree(priv);
 763
 764 err_priv:
 765         return NULL;
 766 }
 767 EXPORT_SYMBOL_GPL(btmrvl_add_card);
 768
 769 int btmrvl_remove_card(struct btmrvl_private *priv)
 770 {
 771         struct hci_dev *hdev;
 772
 773         hdev = priv->btmrvl_dev.hcidev;
 774
 775         wake_up_interruptible(&priv->adapter->cmd_wait_q);
 776         wake_up_interruptible(&priv->adapter->event_hs_wait_q);
 777
 778         kthread_stop(priv->main_thread.task);
 779
 780 #ifdef CONFIG_DEBUG_FS
 781         btmrvl_debugfs_remove(hdev);
 782 #endif
 783
 784         hci_unregister_dev(hdev);
 785
 786         hci_free_dev(hdev);
 787
 788         priv->btmrvl_dev.hcidev = NULL;
 789
 790         btmrvl_free_adapter(priv);
 791
 792         kfree(priv);
 793
 794         return 0;
 795 }
 796 EXPORT_SYMBOL_GPL(btmrvl_remove_card);
 797
 798 MODULE_AUTHOR("Marvell International Ltd.");
 799 MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION);
 800 MODULE_VERSION(VERSION);
 801 MODULE_LICENSE("GPL v2");