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_KERNEL);
 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 static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb)
 362 {
 363         int ret = 0;
 364
 365         if (!skb || !skb->data)
 366                 return -EINVAL;
 367
 368         if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) {
 369                 BT_ERR("Tx Error: Bad skb length %d : %d",
 370                                                 skb->len, BTM_UPLD_SIZE);
 371                 return -EINVAL;
 372         }
 373
 374         skb_push(skb, BTM_HEADER_LEN);
 375
 376         /* header type: byte[3]
 377          * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor
 378          * header length: byte[2][1][0]
 379          */
 380
 381         skb->data[0] = (skb->len & 0x0000ff);
 382         skb->data[1] = (skb->len & 0x00ff00) >> 8;
 383         skb->data[2] = (skb->len & 0xff0000) >> 16;
 384         skb->data[3] = hci_skb_pkt_type(skb);
 385
 386         if (priv->hw_host_to_card)
 387                 ret = priv->hw_host_to_card(priv, skb->data, skb->len);
 388
 389         return ret;
 390 }
 391
 392 static void btmrvl_init_adapter(struct btmrvl_private *priv)
 393 {
 394         int buf_size;
 395
 396         skb_queue_head_init(&priv->adapter->tx_queue);
 397
 398         priv->adapter->ps_state = PS_AWAKE;
 399
 400         buf_size = ALIGN_SZ(SDIO_BLOCK_SIZE, BTSDIO_DMA_ALIGN);
 401         priv->adapter->hw_regs_buf = kzalloc(buf_size, GFP_KERNEL);
 402         if (!priv->adapter->hw_regs_buf) {
 403                 priv->adapter->hw_regs = NULL;
 404                 BT_ERR("Unable to allocate buffer for hw_regs.");
 405         } else {
 406                 priv->adapter->hw_regs =
 407                         (u8 *)ALIGN_ADDR(priv->adapter->hw_regs_buf,
 408                                          BTSDIO_DMA_ALIGN);
 409                 BT_DBG("hw_regs_buf=%p hw_regs=%p",
 410                        priv->adapter->hw_regs_buf, priv->adapter->hw_regs);
 411         }
 412
 413         init_waitqueue_head(&priv->adapter->cmd_wait_q);
 414         init_waitqueue_head(&priv->adapter->event_hs_wait_q);
 415 }
 416
 417 static void btmrvl_free_adapter(struct btmrvl_private *priv)
 418 {
 419         skb_queue_purge(&priv->adapter->tx_queue);
 420
 421         kfree(priv->adapter->hw_regs_buf);
 422         kfree(priv->adapter);
 423
 424         priv->adapter = NULL;
 425 }
 426
 427 static int btmrvl_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
 428 {
 429         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 430
 431         BT_DBG("type=%d, len=%d", hci_skb_pkt_type(skb), skb->len);
 432
 433         if (priv->adapter->is_suspending || priv->adapter->is_suspended) {
 434                 BT_ERR("%s: Device is suspending or suspended", __func__);
 435                 return -EBUSY;
 436         }
 437
 438         switch (hci_skb_pkt_type(skb)) {
 439         case HCI_COMMAND_PKT:
 440                 hdev->stat.cmd_tx++;
 441                 break;
 442
 443         case HCI_ACLDATA_PKT:
 444                 hdev->stat.acl_tx++;
 445                 break;
 446
 447         case HCI_SCODATA_PKT:
 448                 hdev->stat.sco_tx++;
 449                 break;
 450         }
 451
 452         skb_queue_tail(&priv->adapter->tx_queue, skb);
 453
 454         if (!priv->adapter->is_suspended)
 455                 wake_up_interruptible(&priv->main_thread.wait_q);
 456
 457         return 0;
 458 }
 459
 460 static int btmrvl_flush(struct hci_dev *hdev)
 461 {
 462         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 463
 464         skb_queue_purge(&priv->adapter->tx_queue);
 465
 466         return 0;
 467 }
 468
 469 static int btmrvl_close(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_open(struct hci_dev *hdev)
 479 {
 480         return 0;
 481 }
 482
 483 static int btmrvl_download_cal_data(struct btmrvl_private *priv,
 484                                     u8 *data, int len)
 485 {
 486         int ret;
 487
 488         data[0] = 0x00;
 489         data[1] = 0x00;
 490         data[2] = 0x00;
 491         data[3] = len;
 492
 493         print_hex_dump_bytes("Calibration data: ",
 494                              DUMP_PREFIX_OFFSET, data, BT_CAL_HDR_LEN + len);
 495
 496         ret = btmrvl_send_sync_cmd(priv, BT_CMD_LOAD_CONFIG_DATA, data,
 497                                    BT_CAL_HDR_LEN + len);
 498         if (ret)
 499                 BT_ERR("Failed to download calibration data");
 500
 501         return 0;
 502 }
 503
 504 static int btmrvl_check_device_tree(struct btmrvl_private *priv)
 505 {
 506         struct device_node *dt_node;
 507         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 508         u8 cal_data[BT_CAL_HDR_LEN + BT_CAL_DATA_SIZE];
 509         int ret = 0;
 510         u16 gpio, gap;
 511
 512         if (card->plt_of_node) {
 513                 dt_node = card->plt_of_node;
 514                 ret = of_property_read_u16(dt_node, "marvell,wakeup-pin",
 515                                            &gpio);
 516                 if (ret)
 517                         gpio = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
 518
 519                 ret = of_property_read_u16(dt_node, "marvell,wakeup-gap-ms",
 520                                            &gap);
 521                 if (ret)
 522                         gap = (u8)(priv->btmrvl_dev.gpio_gap & 0x00ff);
 523
 524                 priv->btmrvl_dev.gpio_gap = (gpio << 8) + gap;
 525
 526                 ret = of_property_read_u8_array(dt_node, "marvell,cal-data",
 527                                                 cal_data + BT_CAL_HDR_LEN,
 528                                                 BT_CAL_DATA_SIZE);
 529                 if (ret)
 530                         return ret;
 531
 532                 BT_DBG("Use cal data from device tree");
 533                 ret = btmrvl_download_cal_data(priv, cal_data,
 534                                                BT_CAL_DATA_SIZE);
 535                 if (ret)
 536                         BT_ERR("Fail to download calibrate data");
 537         }
 538
 539         return ret;
 540 }
 541
 542 static int btmrvl_setup(struct hci_dev *hdev)
 543 {
 544         struct btmrvl_private *priv = hci_get_drvdata(hdev);
 545         int ret;
 546
 547         ret = btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
 548         if (ret)
 549                 return ret;
 550
 551         priv->btmrvl_dev.gpio_gap = 0xfffe;
 552
 553         btmrvl_check_device_tree(priv);
 554
 555         btmrvl_enable_sco_routing_to_host(priv);
 556
 557         btmrvl_pscan_window_reporting(priv, 0x01);
 558
 559         priv->btmrvl_dev.psmode = 1;
 560         btmrvl_enable_ps(priv);
 561
 562         btmrvl_send_hscfg_cmd(priv);
 563
 564         return 0;
 565 }
 566
 567 static int btmrvl_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
 568 {
 569         struct sk_buff *skb;
 570         long ret;
 571         u8 buf[8];
 572
 573         buf[0] = MRVL_VENDOR_PKT;
 574         buf[1] = sizeof(bdaddr_t);
 575         memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
 576
 577         skb = __hci_cmd_sync(hdev, BT_CMD_SET_BDADDR, sizeof(buf), buf,
 578                              HCI_INIT_TIMEOUT);
 579         if (IS_ERR(skb)) {
 580                 ret = PTR_ERR(skb);
 581                 BT_ERR("%s: changing btmrvl device address failed (%ld)",
 582                        hdev->name, ret);
 583                 return ret;
 584         }
 585         kfree_skb(skb);
 586
 587         return 0;
 588 }
 589
 590 /*
 591  * This function handles the event generated by firmware, rx data
 592  * received from firmware, and tx data sent from kernel.
 593  */
 594 static int btmrvl_service_main_thread(void *data)
 595 {
 596         struct btmrvl_thread *thread = data;
 597         struct btmrvl_private *priv = thread->priv;
 598         struct btmrvl_adapter *adapter = priv->adapter;
 599         wait_queue_entry_t wait;
 600         struct sk_buff *skb;
 601         ulong flags;
 602
 603         init_waitqueue_entry(&wait, current);
 604
 605         for (;;) {
 606                 add_wait_queue(&thread->wait_q, &wait);
 607
 608                 set_current_state(TASK_INTERRUPTIBLE);
 609                 if (kthread_should_stop() || priv->surprise_removed) {
 610                         BT_DBG("main_thread: break from main thread");
 611                         break;
 612                 }
 613
 614                 if (adapter->wakeup_tries ||
 615                                 ((!adapter->int_count) &&
 616                                 (!priv->btmrvl_dev.tx_dnld_rdy ||
 617                                 skb_queue_empty(&adapter->tx_queue)))) {
 618                         BT_DBG("main_thread is sleeping...");
 619                         schedule();
 620                 }
 621
 622                 set_current_state(TASK_RUNNING);
 623
 624                 remove_wait_queue(&thread->wait_q, &wait);
 625
 626                 BT_DBG("main_thread woke up");
 627
 628                 if (kthread_should_stop() || priv->surprise_removed) {
 629                         BT_DBG("main_thread: break from main thread");
 630                         break;
 631                 }
 632
 633                 spin_lock_irqsave(&priv->driver_lock, flags);
 634                 if (adapter->int_count) {
 635                         adapter->int_count = 0;
 636                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 637                         priv->hw_process_int_status(priv);
 638                 } else if (adapter->ps_state == PS_SLEEP &&
 639                                         !skb_queue_empty(&adapter->tx_queue)) {
 640                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 641                         adapter->wakeup_tries++;
 642                         priv->hw_wakeup_firmware(priv);
 643                         continue;
 644                 } else {
 645                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 646                 }
 647
 648                 if (adapter->ps_state == PS_SLEEP)
 649                         continue;
 650
 651                 if (!priv->btmrvl_dev.tx_dnld_rdy ||
 652                     priv->adapter->is_suspended)
 653                         continue;
 654
 655                 skb = skb_dequeue(&adapter->tx_queue);
 656                 if (skb) {
 657                         if (btmrvl_tx_pkt(priv, skb))
 658                                 priv->btmrvl_dev.hcidev->stat.err_tx++;
 659                         else
 660                                 priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len;
 661
 662                         kfree_skb(skb);
 663                 }
 664         }
 665
 666         return 0;
 667 }
 668
 669 int btmrvl_register_hdev(struct btmrvl_private *priv)
 670 {
 671         struct hci_dev *hdev = NULL;
 672         int ret;
 673
 674         hdev = hci_alloc_dev();
 675         if (!hdev) {
 676                 BT_ERR("Can not allocate HCI device");
 677                 goto err_hdev;
 678         }
 679
 680         priv->btmrvl_dev.hcidev = hdev;
 681         hci_set_drvdata(hdev, priv);
 682
 683         hdev->bus   = HCI_SDIO;
 684         hdev->open  = btmrvl_open;
 685         hdev->close = btmrvl_close;
 686         hdev->flush = btmrvl_flush;
 687         hdev->send  = btmrvl_send_frame;
 688         hdev->setup = btmrvl_setup;
 689         hdev->set_bdaddr = btmrvl_set_bdaddr;
 690
 691         hdev->dev_type = priv->btmrvl_dev.dev_type;
 692
 693         ret = hci_register_dev(hdev);
 694         if (ret < 0) {
 695                 BT_ERR("Can not register HCI device");
 696                 goto err_hci_register_dev;
 697         }
 698
 699 #ifdef CONFIG_DEBUG_FS
 700         btmrvl_debugfs_init(hdev);
 701 #endif
 702
 703         return 0;
 704
 705 err_hci_register_dev:
 706         hci_free_dev(hdev);
 707
 708 err_hdev:
 709         /* Stop the thread servicing the interrupts */
 710         kthread_stop(priv->main_thread.task);
 711
 712         btmrvl_free_adapter(priv);
 713         kfree(priv);
 714
 715         return -ENOMEM;
 716 }
 717 EXPORT_SYMBOL_GPL(btmrvl_register_hdev);
 718
 719 struct btmrvl_private *btmrvl_add_card(void *card)
 720 {
 721         struct btmrvl_private *priv;
 722
 723         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 724         if (!priv) {
 725                 BT_ERR("Can not allocate priv");
 726                 goto err_priv;
 727         }
 728
 729         priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL);
 730         if (!priv->adapter) {
 731                 BT_ERR("Allocate buffer for btmrvl_adapter failed!");
 732                 goto err_adapter;
 733         }
 734
 735         btmrvl_init_adapter(priv);
 736
 737         BT_DBG("Starting kthread...");
 738         priv->main_thread.priv = priv;
 739         spin_lock_init(&priv->driver_lock);
 740
 741         init_waitqueue_head(&priv->main_thread.wait_q);
 742         priv->main_thread.task = kthread_run(btmrvl_service_main_thread,
 743                                 &priv->main_thread, "btmrvl_main_service");
 744         if (IS_ERR(priv->main_thread.task))
 745                 goto err_thread;
 746
 747         priv->btmrvl_dev.card = card;
 748         priv->btmrvl_dev.tx_dnld_rdy = true;
 749
 750         return priv;
 751
 752 err_thread:
 753         btmrvl_free_adapter(priv);
 754
 755 err_adapter:
 756         kfree(priv);
 757
 758 err_priv:
 759         return NULL;
 760 }
 761 EXPORT_SYMBOL_GPL(btmrvl_add_card);
 762
 763 int btmrvl_remove_card(struct btmrvl_private *priv)
 764 {
 765         struct hci_dev *hdev;
 766
 767         hdev = priv->btmrvl_dev.hcidev;
 768
 769         wake_up_interruptible(&priv->adapter->cmd_wait_q);
 770         wake_up_interruptible(&priv->adapter->event_hs_wait_q);
 771
 772         kthread_stop(priv->main_thread.task);
 773
 774 #ifdef CONFIG_DEBUG_FS
 775         btmrvl_debugfs_remove(hdev);
 776 #endif
 777
 778         hci_unregister_dev(hdev);
 779
 780         hci_free_dev(hdev);
 781
 782         priv->btmrvl_dev.hcidev = NULL;
 783
 784         btmrvl_free_adapter(priv);
 785
 786         kfree(priv);
 787
 788         return 0;
 789 }
 790 EXPORT_SYMBOL_GPL(btmrvl_remove_card);
 791
 792 MODULE_AUTHOR("Marvell International Ltd.");
 793 MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION);
 794 MODULE_VERSION(VERSION);
 795 MODULE_LICENSE("GPL v2");