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 <net/bluetooth/bluetooth.h>
  22 #include <net/bluetooth/hci_core.h>
  23
  24 #include "btmrvl_drv.h"
  25
  26 #define VERSION "1.0"
  27
  28 /*
  29  * This function is called by interface specific interrupt handler.
  30  * It updates Power Save & Host Sleep states, and wakes up the main
  31  * thread.
  32  */
  33 void btmrvl_interrupt(struct btmrvl_private *priv)
  34 {
  35         priv->adapter->ps_state = PS_AWAKE;
  36
  37         priv->adapter->wakeup_tries = 0;
  38
  39         priv->adapter->int_count++;
  40
  41         wake_up_interruptible(&priv->main_thread.wait_q);
  42 }
  43 EXPORT_SYMBOL_GPL(btmrvl_interrupt);
  44
  45 void btmrvl_check_evtpkt(struct btmrvl_private *priv, struct sk_buff *skb)
  46 {
  47         struct hci_event_hdr *hdr = (void *) skb->data;
  48         struct hci_ev_cmd_complete *ec;
  49         u16 opcode, ocf;
  50
  51         if (hdr->evt == HCI_EV_CMD_COMPLETE) {
  52                 ec = (void *) (skb->data + HCI_EVENT_HDR_SIZE);
  53                 opcode = __le16_to_cpu(ec->opcode);
  54                 ocf = hci_opcode_ocf(opcode);
  55                 if (ocf == BT_CMD_MODULE_CFG_REQ &&
  56                                         priv->btmrvl_dev.sendcmdflag) {
  57                         priv->btmrvl_dev.sendcmdflag = false;
  58                         priv->adapter->cmd_complete = true;
  59                         wake_up_interruptible(&priv->adapter->cmd_wait_q);
  60                 }
  61         }
  62 }
  63 EXPORT_SYMBOL_GPL(btmrvl_check_evtpkt);
  64
  65 int btmrvl_process_event(struct btmrvl_private *priv, struct sk_buff *skb)
  66 {
  67         struct btmrvl_adapter *adapter = priv->adapter;
  68         struct btmrvl_event *event;
  69         u8 ret = 0;
  70
  71         event = (struct btmrvl_event *) skb->data;
  72         if (event->ec != 0xff) {
  73                 BT_DBG("Not Marvell Event=%x", event->ec);
  74                 ret = -EINVAL;
  75                 goto exit;
  76         }
  77
  78         switch (event->data[0]) {
  79         case BT_CMD_AUTO_SLEEP_MODE:
  80                 if (!event->data[2]) {
  81                         if (event->data[1] == BT_PS_ENABLE)
  82                                 adapter->psmode = 1;
  83                         else
  84                                 adapter->psmode = 0;
  85                         BT_DBG("PS Mode:%s",
  86                                 (adapter->psmode) ? "Enable" : "Disable");
  87                 } else {
  88                         BT_DBG("PS Mode command failed");
  89                 }
  90                 break;
  91
  92         case BT_CMD_HOST_SLEEP_CONFIG:
  93                 if (!event->data[3])
  94                         BT_DBG("gpio=%x, gap=%x", event->data[1],
  95                                                         event->data[2]);
  96                 else
  97                         BT_DBG("HSCFG command failed");
  98                 break;
  99
 100         case BT_CMD_HOST_SLEEP_ENABLE:
 101                 if (!event->data[1]) {
 102                         adapter->hs_state = HS_ACTIVATED;
 103                         if (adapter->psmode)
 104                                 adapter->ps_state = PS_SLEEP;
 105                         wake_up_interruptible(&adapter->cmd_wait_q);
 106                         BT_DBG("HS ACTIVATED!");
 107                 } else {
 108                         BT_DBG("HS Enable failed");
 109                 }
 110                 break;
 111
 112         case BT_CMD_MODULE_CFG_REQ:
 113                 if (priv->btmrvl_dev.sendcmdflag &&
 114                                 event->data[1] == MODULE_BRINGUP_REQ) {
 115                         BT_DBG("EVENT:%s", (event->data[2]) ?
 116                                 "Bring-up failed" : "Bring-up succeed");
 117                 } else if (priv->btmrvl_dev.sendcmdflag &&
 118                                 event->data[1] == MODULE_SHUTDOWN_REQ) {
 119                         BT_DBG("EVENT:%s", (event->data[2]) ?
 120                                 "Shutdown failed" : "Shutdown succeed");
 121                 } else {
 122                         BT_DBG("BT_CMD_MODULE_CFG_REQ resp for APP");
 123                         ret = -EINVAL;
 124                 }
 125                 break;
 126
 127         case BT_EVENT_POWER_STATE:
 128                 if (event->data[1] == BT_PS_SLEEP)
 129                         adapter->ps_state = PS_SLEEP;
 130                 BT_DBG("EVENT:%s",
 131                         (adapter->ps_state) ? "PS_SLEEP" : "PS_AWAKE");
 132                 break;
 133
 134         default:
 135                 BT_DBG("Unknown Event=%d", event->data[0]);
 136                 ret = -EINVAL;
 137                 break;
 138         }
 139
 140 exit:
 141         if (!ret)
 142                 kfree_skb(skb);
 143
 144         return ret;
 145 }
 146 EXPORT_SYMBOL_GPL(btmrvl_process_event);
 147
 148 int btmrvl_send_module_cfg_cmd(struct btmrvl_private *priv, int subcmd)
 149 {
 150         struct sk_buff *skb;
 151         struct btmrvl_cmd *cmd;
 152         int ret = 0;
 153
 154         skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
 155         if (skb == NULL) {
 156                 BT_ERR("No free skb");
 157                 return -ENOMEM;
 158         }
 159
 160         cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
 161         cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_MODULE_CFG_REQ));
 162         cmd->length = 1;
 163         cmd->data[0] = subcmd;
 164
 165         bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
 166
 167         skb->dev = (void *) priv->btmrvl_dev.hcidev;
 168         skb_queue_head(&priv->adapter->tx_queue, skb);
 169
 170         priv->btmrvl_dev.sendcmdflag = true;
 171
 172         priv->adapter->cmd_complete = false;
 173
 174         BT_DBG("Queue module cfg Command");
 175
 176         wake_up_interruptible(&priv->main_thread.wait_q);
 177
 178         if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q,
 179                                 priv->adapter->cmd_complete,
 180                                 msecs_to_jiffies(WAIT_UNTIL_CMD_RESP))) {
 181                 ret = -ETIMEDOUT;
 182                 BT_ERR("module_cfg_cmd(%x): timeout: %d",
 183                                         subcmd, priv->btmrvl_dev.sendcmdflag);
 184         }
 185
 186         BT_DBG("module cfg Command done");
 187
 188         return ret;
 189 }
 190 EXPORT_SYMBOL_GPL(btmrvl_send_module_cfg_cmd);
 191
 192 int btmrvl_enable_ps(struct btmrvl_private *priv)
 193 {
 194         struct sk_buff *skb;
 195         struct btmrvl_cmd *cmd;
 196
 197         skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
 198         if (skb == NULL) {
 199                 BT_ERR("No free skb");
 200                 return -ENOMEM;
 201         }
 202
 203         cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
 204         cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF,
 205                                         BT_CMD_AUTO_SLEEP_MODE));
 206         cmd->length = 1;
 207
 208         if (priv->btmrvl_dev.psmode)
 209                 cmd->data[0] = BT_PS_ENABLE;
 210         else
 211                 cmd->data[0] = BT_PS_DISABLE;
 212
 213         bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
 214
 215         skb->dev = (void *) priv->btmrvl_dev.hcidev;
 216         skb_queue_head(&priv->adapter->tx_queue, skb);
 217
 218         BT_DBG("Queue PSMODE Command:%d", cmd->data[0]);
 219
 220         return 0;
 221 }
 222 EXPORT_SYMBOL_GPL(btmrvl_enable_ps);
 223
 224 static int btmrvl_enable_hs(struct btmrvl_private *priv)
 225 {
 226         struct sk_buff *skb;
 227         struct btmrvl_cmd *cmd;
 228         int ret = 0;
 229
 230         skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
 231         if (skb == NULL) {
 232                 BT_ERR("No free skb");
 233                 return -ENOMEM;
 234         }
 235
 236         cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
 237         cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_HOST_SLEEP_ENABLE));
 238         cmd->length = 0;
 239
 240         bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
 241
 242         skb->dev = (void *) priv->btmrvl_dev.hcidev;
 243         skb_queue_head(&priv->adapter->tx_queue, skb);
 244
 245         BT_DBG("Queue hs enable Command");
 246
 247         wake_up_interruptible(&priv->main_thread.wait_q);
 248
 249         if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q,
 250                         priv->adapter->hs_state,
 251                         msecs_to_jiffies(WAIT_UNTIL_HS_STATE_CHANGED))) {
 252                 ret = -ETIMEDOUT;
 253                 BT_ERR("timeout: %d, %d,%d", priv->adapter->hs_state,
 254                                                 priv->adapter->ps_state,
 255                                                 priv->adapter->wakeup_tries);
 256         }
 257
 258         return ret;
 259 }
 260
 261 int btmrvl_prepare_command(struct btmrvl_private *priv)
 262 {
 263         struct sk_buff *skb = NULL;
 264         struct btmrvl_cmd *cmd;
 265         int ret = 0;
 266
 267         if (priv->btmrvl_dev.hscfgcmd) {
 268                 priv->btmrvl_dev.hscfgcmd = 0;
 269
 270                 skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC);
 271                 if (skb == NULL) {
 272                         BT_ERR("No free skb");
 273                         return -ENOMEM;
 274                 }
 275
 276                 cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd));
 277                 cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_HOST_SLEEP_CONFIG));
 278                 cmd->length = 2;
 279                 cmd->data[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8;
 280                 cmd->data[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff);
 281
 282                 bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT;
 283
 284                 skb->dev = (void *) priv->btmrvl_dev.hcidev;
 285                 skb_queue_head(&priv->adapter->tx_queue, skb);
 286
 287                 BT_DBG("Queue HSCFG Command, gpio=0x%x, gap=0x%x",
 288                                                 cmd->data[0], cmd->data[1]);
 289         }
 290
 291         if (priv->btmrvl_dev.pscmd) {
 292                 priv->btmrvl_dev.pscmd = 0;
 293                 btmrvl_enable_ps(priv);
 294         }
 295
 296         if (priv->btmrvl_dev.hscmd) {
 297                 priv->btmrvl_dev.hscmd = 0;
 298
 299                 if (priv->btmrvl_dev.hsmode) {
 300                         ret = btmrvl_enable_hs(priv);
 301                 } else {
 302                         ret = priv->hw_wakeup_firmware(priv);
 303                         priv->adapter->hs_state = HS_DEACTIVATED;
 304                 }
 305         }
 306
 307         return ret;
 308 }
 309
 310 static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb)
 311 {
 312         int ret = 0;
 313
 314         if (!skb || !skb->data)
 315                 return -EINVAL;
 316
 317         if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) {
 318                 BT_ERR("Tx Error: Bad skb length %d : %d",
 319                                                 skb->len, BTM_UPLD_SIZE);
 320                 return -EINVAL;
 321         }
 322
 323         if (skb_headroom(skb) < BTM_HEADER_LEN) {
 324                 struct sk_buff *tmp = skb;
 325
 326                 skb = skb_realloc_headroom(skb, BTM_HEADER_LEN);
 327                 if (!skb) {
 328                         BT_ERR("Tx Error: realloc_headroom failed %d",
 329                                 BTM_HEADER_LEN);
 330                         skb = tmp;
 331                         return -EINVAL;
 332                 }
 333
 334                 kfree_skb(tmp);
 335         }
 336
 337         skb_push(skb, BTM_HEADER_LEN);
 338
 339         /* header type: byte[3]
 340          * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor
 341          * header length: byte[2][1][0]
 342          */
 343
 344         skb->data[0] = (skb->len & 0x0000ff);
 345         skb->data[1] = (skb->len & 0x00ff00) >> 8;
 346         skb->data[2] = (skb->len & 0xff0000) >> 16;
 347         skb->data[3] = bt_cb(skb)->pkt_type;
 348
 349         if (priv->hw_host_to_card)
 350                 ret = priv->hw_host_to_card(priv, skb->data, skb->len);
 351
 352         return ret;
 353 }
 354
 355 static void btmrvl_init_adapter(struct btmrvl_private *priv)
 356 {
 357         skb_queue_head_init(&priv->adapter->tx_queue);
 358
 359         priv->adapter->ps_state = PS_AWAKE;
 360
 361         init_waitqueue_head(&priv->adapter->cmd_wait_q);
 362 }
 363
 364 static void btmrvl_free_adapter(struct btmrvl_private *priv)
 365 {
 366         skb_queue_purge(&priv->adapter->tx_queue);
 367
 368         kfree(priv->adapter);
 369
 370         priv->adapter = NULL;
 371 }
 372
 373 static int btmrvl_ioctl(struct hci_dev *hdev,
 374                                 unsigned int cmd, unsigned long arg)
 375 {
 376         return -ENOIOCTLCMD;
 377 }
 378
 379 static void btmrvl_destruct(struct hci_dev *hdev)
 380 {
 381 }
 382
 383 static int btmrvl_send_frame(struct sk_buff *skb)
 384 {
 385         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 386         struct btmrvl_private *priv = NULL;
 387
 388         BT_DBG("type=%d, len=%d", skb->pkt_type, skb->len);
 389
 390         if (!hdev || !hdev->driver_data) {
 391                 BT_ERR("Frame for unknown HCI device");
 392                 return -ENODEV;
 393         }
 394
 395         priv = (struct btmrvl_private *) hdev->driver_data;
 396         if (!test_bit(HCI_RUNNING, &hdev->flags)) {
 397                 BT_ERR("Failed testing HCI_RUNING, flags=%lx", hdev->flags);
 398                 print_hex_dump_bytes("data: ", DUMP_PREFIX_OFFSET,
 399                                                         skb->data, skb->len);
 400                 return -EBUSY;
 401         }
 402
 403         switch (bt_cb(skb)->pkt_type) {
 404         case HCI_COMMAND_PKT:
 405                 hdev->stat.cmd_tx++;
 406                 break;
 407
 408         case HCI_ACLDATA_PKT:
 409                 hdev->stat.acl_tx++;
 410                 break;
 411
 412         case HCI_SCODATA_PKT:
 413                 hdev->stat.sco_tx++;
 414                 break;
 415         }
 416
 417         skb_queue_tail(&priv->adapter->tx_queue, skb);
 418
 419         wake_up_interruptible(&priv->main_thread.wait_q);
 420
 421         return 0;
 422 }
 423
 424 static int btmrvl_flush(struct hci_dev *hdev)
 425 {
 426         struct btmrvl_private *priv = hdev->driver_data;
 427
 428         skb_queue_purge(&priv->adapter->tx_queue);
 429
 430         return 0;
 431 }
 432
 433 static int btmrvl_close(struct hci_dev *hdev)
 434 {
 435         struct btmrvl_private *priv = hdev->driver_data;
 436
 437         if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 438                 return 0;
 439
 440         skb_queue_purge(&priv->adapter->tx_queue);
 441
 442         return 0;
 443 }
 444
 445 static int btmrvl_open(struct hci_dev *hdev)
 446 {
 447         set_bit(HCI_RUNNING, &hdev->flags);
 448
 449         return 0;
 450 }
 451
 452 /*
 453  * This function handles the event generated by firmware, rx data
 454  * received from firmware, and tx data sent from kernel.
 455  */
 456 static int btmrvl_service_main_thread(void *data)
 457 {
 458         struct btmrvl_thread *thread = data;
 459         struct btmrvl_private *priv = thread->priv;
 460         struct btmrvl_adapter *adapter = priv->adapter;
 461         wait_queue_t wait;
 462         struct sk_buff *skb;
 463         ulong flags;
 464
 465         init_waitqueue_entry(&wait, current);
 466
 467         current->flags |= PF_NOFREEZE;
 468
 469         for (;;) {
 470                 add_wait_queue(&thread->wait_q, &wait);
 471
 472                 set_current_state(TASK_INTERRUPTIBLE);
 473
 474                 if (adapter->wakeup_tries ||
 475                                 ((!adapter->int_count) &&
 476                                 (!priv->btmrvl_dev.tx_dnld_rdy ||
 477                                 skb_queue_empty(&adapter->tx_queue)))) {
 478                         BT_DBG("main_thread is sleeping...");
 479                         schedule();
 480                 }
 481
 482                 set_current_state(TASK_RUNNING);
 483
 484                 remove_wait_queue(&thread->wait_q, &wait);
 485
 486                 BT_DBG("main_thread woke up");
 487
 488                 if (kthread_should_stop()) {
 489                         BT_DBG("main_thread: break from main thread");
 490                         break;
 491                 }
 492
 493                 spin_lock_irqsave(&priv->driver_lock, flags);
 494                 if (adapter->int_count) {
 495                         adapter->int_count = 0;
 496                 } else if (adapter->ps_state == PS_SLEEP &&
 497                                         !skb_queue_empty(&adapter->tx_queue)) {
 498                         spin_unlock_irqrestore(&priv->driver_lock, flags);
 499                         adapter->wakeup_tries++;
 500                         priv->hw_wakeup_firmware(priv);
 501                         continue;
 502                 }
 503                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 504
 505                 if (adapter->ps_state == PS_SLEEP)
 506                         continue;
 507
 508                 if (!priv->btmrvl_dev.tx_dnld_rdy)
 509                         continue;
 510
 511                 skb = skb_dequeue(&adapter->tx_queue);
 512                 if (skb) {
 513                         if (btmrvl_tx_pkt(priv, skb))
 514                                 priv->btmrvl_dev.hcidev->stat.err_tx++;
 515                         else
 516                                 priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len;
 517
 518                         kfree_skb(skb);
 519                 }
 520         }
 521
 522         return 0;
 523 }
 524
 525 struct btmrvl_private *btmrvl_add_card(void *card)
 526 {
 527         struct hci_dev *hdev = NULL;
 528         struct btmrvl_private *priv;
 529         int ret;
 530
 531         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 532         if (!priv) {
 533                 BT_ERR("Can not allocate priv");
 534                 goto err_priv;
 535         }
 536
 537         priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL);
 538         if (!priv->adapter) {
 539                 BT_ERR("Allocate buffer for btmrvl_adapter failed!");
 540                 goto err_adapter;
 541         }
 542
 543         btmrvl_init_adapter(priv);
 544
 545         hdev = hci_alloc_dev();
 546         if (!hdev) {
 547                 BT_ERR("Can not allocate HCI device");
 548                 goto err_hdev;
 549         }
 550
 551         BT_DBG("Starting kthread...");
 552         priv->main_thread.priv = priv;
 553         spin_lock_init(&priv->driver_lock);
 554
 555         init_waitqueue_head(&priv->main_thread.wait_q);
 556         priv->main_thread.task = kthread_run(btmrvl_service_main_thread,
 557                                 &priv->main_thread, "btmrvl_main_service");
 558
 559         priv->btmrvl_dev.hcidev = hdev;
 560         priv->btmrvl_dev.card = card;
 561
 562         hdev->driver_data = priv;
 563
 564         priv->btmrvl_dev.tx_dnld_rdy = true;
 565
 566         hdev->bus = HCI_SDIO;
 567         hdev->open = btmrvl_open;
 568         hdev->close = btmrvl_close;
 569         hdev->flush = btmrvl_flush;
 570         hdev->send = btmrvl_send_frame;
 571         hdev->destruct = btmrvl_destruct;
 572         hdev->ioctl = btmrvl_ioctl;
 573         hdev->owner = THIS_MODULE;
 574
 575         ret = hci_register_dev(hdev);
 576         if (ret < 0) {
 577                 BT_ERR("Can not register HCI device");
 578                 goto err_hci_register_dev;
 579         }
 580
 581 #ifdef CONFIG_DEBUG_FS
 582         btmrvl_debugfs_init(hdev);
 583 #endif
 584
 585         return priv;
 586
 587 err_hci_register_dev:
 588         /* Stop the thread servicing the interrupts */
 589         kthread_stop(priv->main_thread.task);
 590
 591         hci_free_dev(hdev);
 592
 593 err_hdev:
 594         btmrvl_free_adapter(priv);
 595
 596 err_adapter:
 597         kfree(priv);
 598
 599 err_priv:
 600         return NULL;
 601 }
 602 EXPORT_SYMBOL_GPL(btmrvl_add_card);
 603
 604 int btmrvl_remove_card(struct btmrvl_private *priv)
 605 {
 606         struct hci_dev *hdev;
 607
 608         hdev = priv->btmrvl_dev.hcidev;
 609
 610         wake_up_interruptible(&priv->adapter->cmd_wait_q);
 611
 612         kthread_stop(priv->main_thread.task);
 613
 614 #ifdef CONFIG_DEBUG_FS
 615         btmrvl_debugfs_remove(hdev);
 616 #endif
 617
 618         hci_unregister_dev(hdev);
 619
 620         hci_free_dev(hdev);
 621
 622         priv->btmrvl_dev.hcidev = NULL;
 623
 624         btmrvl_free_adapter(priv);
 625
 626         kfree(priv);
 627
 628         return 0;
 629 }
 630 EXPORT_SYMBOL_GPL(btmrvl_remove_card);
 631
 632 MODULE_AUTHOR("Marvell International Ltd.");
 633 MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION);
 634 MODULE_VERSION(VERSION);
 635 MODULE_LICENSE("GPL v2");