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 int 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", 116 ((event->data[2] == MODULE_BROUGHT_UP) || 117 (event->data[2] == MODULE_ALREADY_UP)) ? 118 "Bring-up succeed" : "Bring-up failed"); 119 120 if (event->length > 3) 121 priv->btmrvl_dev.dev_type = event->data[3]; 122 else 123 priv->btmrvl_dev.dev_type = HCI_BREDR; 124 125 BT_DBG("dev_type: %d", priv->btmrvl_dev.dev_type); 126 } else if (priv->btmrvl_dev.sendcmdflag && 127 event->data[1] == MODULE_SHUTDOWN_REQ) { 128 BT_DBG("EVENT:%s", (event->data[2]) ? 129 "Shutdown failed" : "Shutdown succeed"); 130 } else { 131 BT_DBG("BT_CMD_MODULE_CFG_REQ resp for APP"); 132 ret = -EINVAL; 133 } 134 break; 135 136 case BT_EVENT_POWER_STATE: 137 if (event->data[1] == BT_PS_SLEEP) 138 adapter->ps_state = PS_SLEEP; 139 BT_DBG("EVENT:%s", 140 (adapter->ps_state) ? "PS_SLEEP" : "PS_AWAKE"); 141 break; 142 143 default: 144 BT_DBG("Unknown Event=%d", event->data[0]); 145 ret = -EINVAL; 146 break; 147 } 148 149 exit: 150 if (!ret) 151 kfree_skb(skb); 152 153 return ret; 154 } 155 EXPORT_SYMBOL_GPL(btmrvl_process_event); 156 157 int btmrvl_send_module_cfg_cmd(struct btmrvl_private *priv, int subcmd) 158 { 159 struct sk_buff *skb; 160 struct btmrvl_cmd *cmd; 161 int ret = 0; 162 163 skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); 164 if (skb == NULL) { 165 BT_ERR("No free skb"); 166 return -ENOMEM; 167 } 168 169 cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd)); 170 cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_MODULE_CFG_REQ)); 171 cmd->length = 1; 172 cmd->data[0] = subcmd; 173 174 bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; 175 176 skb->dev = (void *) priv->btmrvl_dev.hcidev; 177 skb_queue_head(&priv->adapter->tx_queue, skb); 178 179 priv->btmrvl_dev.sendcmdflag = true; 180 181 priv->adapter->cmd_complete = false; 182 183 BT_DBG("Queue module cfg Command"); 184 185 wake_up_interruptible(&priv->main_thread.wait_q); 186 187 if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q, 188 priv->adapter->cmd_complete, 189 msecs_to_jiffies(WAIT_UNTIL_CMD_RESP))) { 190 ret = -ETIMEDOUT; 191 BT_ERR("module_cfg_cmd(%x): timeout: %d", 192 subcmd, priv->btmrvl_dev.sendcmdflag); 193 } 194 195 BT_DBG("module cfg Command done"); 196 197 return ret; 198 } 199 EXPORT_SYMBOL_GPL(btmrvl_send_module_cfg_cmd); 200 201 int btmrvl_enable_ps(struct btmrvl_private *priv) 202 { 203 struct sk_buff *skb; 204 struct btmrvl_cmd *cmd; 205 206 skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); 207 if (skb == NULL) { 208 BT_ERR("No free skb"); 209 return -ENOMEM; 210 } 211 212 cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd)); 213 cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, 214 BT_CMD_AUTO_SLEEP_MODE)); 215 cmd->length = 1; 216 217 if (priv->btmrvl_dev.psmode) 218 cmd->data[0] = BT_PS_ENABLE; 219 else 220 cmd->data[0] = BT_PS_DISABLE; 221 222 bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; 223 224 skb->dev = (void *) priv->btmrvl_dev.hcidev; 225 skb_queue_head(&priv->adapter->tx_queue, skb); 226 227 BT_DBG("Queue PSMODE Command:%d", cmd->data[0]); 228 229 return 0; 230 } 231 EXPORT_SYMBOL_GPL(btmrvl_enable_ps); 232 233 static int btmrvl_enable_hs(struct btmrvl_private *priv) 234 { 235 struct sk_buff *skb; 236 struct btmrvl_cmd *cmd; 237 int ret = 0; 238 239 skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); 240 if (skb == NULL) { 241 BT_ERR("No free skb"); 242 return -ENOMEM; 243 } 244 245 cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd)); 246 cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_HOST_SLEEP_ENABLE)); 247 cmd->length = 0; 248 249 bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; 250 251 skb->dev = (void *) priv->btmrvl_dev.hcidev; 252 skb_queue_head(&priv->adapter->tx_queue, skb); 253 254 BT_DBG("Queue hs enable Command"); 255 256 wake_up_interruptible(&priv->main_thread.wait_q); 257 258 if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q, 259 priv->adapter->hs_state, 260 msecs_to_jiffies(WAIT_UNTIL_HS_STATE_CHANGED))) { 261 ret = -ETIMEDOUT; 262 BT_ERR("timeout: %d, %d,%d", priv->adapter->hs_state, 263 priv->adapter->ps_state, 264 priv->adapter->wakeup_tries); 265 } 266 267 return ret; 268 } 269 270 int btmrvl_prepare_command(struct btmrvl_private *priv) 271 { 272 struct sk_buff *skb = NULL; 273 struct btmrvl_cmd *cmd; 274 int ret = 0; 275 276 if (priv->btmrvl_dev.hscfgcmd) { 277 priv->btmrvl_dev.hscfgcmd = 0; 278 279 skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); 280 if (skb == NULL) { 281 BT_ERR("No free skb"); 282 return -ENOMEM; 283 } 284 285 cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd)); 286 cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_HOST_SLEEP_CONFIG)); 287 cmd->length = 2; 288 cmd->data[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8; 289 cmd->data[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff); 290 291 bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; 292 293 skb->dev = (void *) priv->btmrvl_dev.hcidev; 294 skb_queue_head(&priv->adapter->tx_queue, skb); 295 296 BT_DBG("Queue HSCFG Command, gpio=0x%x, gap=0x%x", 297 cmd->data[0], cmd->data[1]); 298 } 299 300 if (priv->btmrvl_dev.pscmd) { 301 priv->btmrvl_dev.pscmd = 0; 302 btmrvl_enable_ps(priv); 303 } 304 305 if (priv->btmrvl_dev.hscmd) { 306 priv->btmrvl_dev.hscmd = 0; 307 308 if (priv->btmrvl_dev.hsmode) { 309 ret = btmrvl_enable_hs(priv); 310 } else { 311 ret = priv->hw_wakeup_firmware(priv); 312 priv->adapter->hs_state = HS_DEACTIVATED; 313 } 314 } 315 316 return ret; 317 } 318 319 static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb) 320 { 321 int ret = 0; 322 323 if (!skb || !skb->data) 324 return -EINVAL; 325 326 if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) { 327 BT_ERR("Tx Error: Bad skb length %d : %d", 328 skb->len, BTM_UPLD_SIZE); 329 return -EINVAL; 330 } 331 332 if (skb_headroom(skb) < BTM_HEADER_LEN) { 333 struct sk_buff *tmp = skb; 334 335 skb = skb_realloc_headroom(skb, BTM_HEADER_LEN); 336 if (!skb) { 337 BT_ERR("Tx Error: realloc_headroom failed %d", 338 BTM_HEADER_LEN); 339 skb = tmp; 340 return -EINVAL; 341 } 342 343 kfree_skb(tmp); 344 } 345 346 skb_push(skb, BTM_HEADER_LEN); 347 348 /* header type: byte[3] 349 * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor 350 * header length: byte[2][1][0] 351 */ 352 353 skb->data[0] = (skb->len & 0x0000ff); 354 skb->data[1] = (skb->len & 0x00ff00) >> 8; 355 skb->data[2] = (skb->len & 0xff0000) >> 16; 356 skb->data[3] = bt_cb(skb)->pkt_type; 357 358 if (priv->hw_host_to_card) 359 ret = priv->hw_host_to_card(priv, skb->data, skb->len); 360 361 return ret; 362 } 363 364 static void btmrvl_init_adapter(struct btmrvl_private *priv) 365 { 366 skb_queue_head_init(&priv->adapter->tx_queue); 367 368 priv->adapter->ps_state = PS_AWAKE; 369 370 init_waitqueue_head(&priv->adapter->cmd_wait_q); 371 } 372 373 static void btmrvl_free_adapter(struct btmrvl_private *priv) 374 { 375 skb_queue_purge(&priv->adapter->tx_queue); 376 377 kfree(priv->adapter); 378 379 priv->adapter = NULL; 380 } 381 382 static int btmrvl_ioctl(struct hci_dev *hdev, 383 unsigned int cmd, unsigned long arg) 384 { 385 return -ENOIOCTLCMD; 386 } 387 388 static void btmrvl_destruct(struct hci_dev *hdev) 389 { 390 } 391 392 static int btmrvl_send_frame(struct sk_buff *skb) 393 { 394 struct hci_dev *hdev = (struct hci_dev *) skb->dev; 395 struct btmrvl_private *priv = NULL; 396 397 BT_DBG("type=%d, len=%d", skb->pkt_type, skb->len); 398 399 if (!hdev || !hdev->driver_data) { 400 BT_ERR("Frame for unknown HCI device"); 401 return -ENODEV; 402 } 403 404 priv = (struct btmrvl_private *) hdev->driver_data; 405 if (!test_bit(HCI_RUNNING, &hdev->flags)) { 406 BT_ERR("Failed testing HCI_RUNING, flags=%lx", hdev->flags); 407 print_hex_dump_bytes("data: ", DUMP_PREFIX_OFFSET, 408 skb->data, skb->len); 409 return -EBUSY; 410 } 411 412 switch (bt_cb(skb)->pkt_type) { 413 case HCI_COMMAND_PKT: 414 hdev->stat.cmd_tx++; 415 break; 416 417 case HCI_ACLDATA_PKT: 418 hdev->stat.acl_tx++; 419 break; 420 421 case HCI_SCODATA_PKT: 422 hdev->stat.sco_tx++; 423 break; 424 } 425 426 skb_queue_tail(&priv->adapter->tx_queue, skb); 427 428 wake_up_interruptible(&priv->main_thread.wait_q); 429 430 return 0; 431 } 432 433 static int btmrvl_flush(struct hci_dev *hdev) 434 { 435 struct btmrvl_private *priv = hdev->driver_data; 436 437 skb_queue_purge(&priv->adapter->tx_queue); 438 439 return 0; 440 } 441 442 static int btmrvl_close(struct hci_dev *hdev) 443 { 444 struct btmrvl_private *priv = hdev->driver_data; 445 446 if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags)) 447 return 0; 448 449 skb_queue_purge(&priv->adapter->tx_queue); 450 451 return 0; 452 } 453 454 static int btmrvl_open(struct hci_dev *hdev) 455 { 456 set_bit(HCI_RUNNING, &hdev->flags); 457 458 return 0; 459 } 460 461 /* 462 * This function handles the event generated by firmware, rx data 463 * received from firmware, and tx data sent from kernel. 464 */ 465 static int btmrvl_service_main_thread(void *data) 466 { 467 struct btmrvl_thread *thread = data; 468 struct btmrvl_private *priv = thread->priv; 469 struct btmrvl_adapter *adapter = priv->adapter; 470 wait_queue_t wait; 471 struct sk_buff *skb; 472 ulong flags; 473 474 init_waitqueue_entry(&wait, current); 475 476 current->flags |= PF_NOFREEZE; 477 478 for (;;) { 479 add_wait_queue(&thread->wait_q, &wait); 480 481 set_current_state(TASK_INTERRUPTIBLE); 482 483 if (adapter->wakeup_tries || 484 ((!adapter->int_count) && 485 (!priv->btmrvl_dev.tx_dnld_rdy || 486 skb_queue_empty(&adapter->tx_queue)))) { 487 BT_DBG("main_thread is sleeping..."); 488 schedule(); 489 } 490 491 set_current_state(TASK_RUNNING); 492 493 remove_wait_queue(&thread->wait_q, &wait); 494 495 BT_DBG("main_thread woke up"); 496 497 if (kthread_should_stop()) { 498 BT_DBG("main_thread: break from main thread"); 499 break; 500 } 501 502 spin_lock_irqsave(&priv->driver_lock, flags); 503 if (adapter->int_count) { 504 adapter->int_count = 0; 505 } else if (adapter->ps_state == PS_SLEEP && 506 !skb_queue_empty(&adapter->tx_queue)) { 507 spin_unlock_irqrestore(&priv->driver_lock, flags); 508 adapter->wakeup_tries++; 509 priv->hw_wakeup_firmware(priv); 510 continue; 511 } 512 spin_unlock_irqrestore(&priv->driver_lock, flags); 513 514 if (adapter->ps_state == PS_SLEEP) 515 continue; 516 517 if (!priv->btmrvl_dev.tx_dnld_rdy) 518 continue; 519 520 skb = skb_dequeue(&adapter->tx_queue); 521 if (skb) { 522 if (btmrvl_tx_pkt(priv, skb)) 523 priv->btmrvl_dev.hcidev->stat.err_tx++; 524 else 525 priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len; 526 527 kfree_skb(skb); 528 } 529 } 530 531 return 0; 532 } 533 534 int btmrvl_register_hdev(struct btmrvl_private *priv) 535 { 536 struct hci_dev *hdev = NULL; 537 int ret; 538 539 hdev = hci_alloc_dev(); 540 if (!hdev) { 541 BT_ERR("Can not allocate HCI device"); 542 goto err_hdev; 543 } 544 545 priv->btmrvl_dev.hcidev = hdev; 546 hdev->driver_data = priv; 547 548 hdev->bus = HCI_SDIO; 549 hdev->open = btmrvl_open; 550 hdev->close = btmrvl_close; 551 hdev->flush = btmrvl_flush; 552 hdev->send = btmrvl_send_frame; 553 hdev->destruct = btmrvl_destruct; 554 hdev->ioctl = btmrvl_ioctl; 555 hdev->owner = THIS_MODULE; 556 557 btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ); 558 559 hdev->dev_type = priv->btmrvl_dev.dev_type; 560 561 ret = hci_register_dev(hdev); 562 if (ret < 0) { 563 BT_ERR("Can not register HCI device"); 564 goto err_hci_register_dev; 565 } 566 567 #ifdef CONFIG_DEBUG_FS 568 btmrvl_debugfs_init(hdev); 569 #endif 570 571 return 0; 572 573 err_hci_register_dev: 574 hci_free_dev(hdev); 575 576 err_hdev: 577 /* Stop the thread servicing the interrupts */ 578 kthread_stop(priv->main_thread.task); 579 580 btmrvl_free_adapter(priv); 581 kfree(priv); 582 583 return -ENOMEM; 584 } 585 EXPORT_SYMBOL_GPL(btmrvl_register_hdev); 586 587 struct btmrvl_private *btmrvl_add_card(void *card) 588 { 589 struct btmrvl_private *priv; 590 591 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 592 if (!priv) { 593 BT_ERR("Can not allocate priv"); 594 goto err_priv; 595 } 596 597 priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL); 598 if (!priv->adapter) { 599 BT_ERR("Allocate buffer for btmrvl_adapter failed!"); 600 goto err_adapter; 601 } 602 603 btmrvl_init_adapter(priv); 604 605 BT_DBG("Starting kthread..."); 606 priv->main_thread.priv = priv; 607 spin_lock_init(&priv->driver_lock); 608 609 init_waitqueue_head(&priv->main_thread.wait_q); 610 priv->main_thread.task = kthread_run(btmrvl_service_main_thread, 611 &priv->main_thread, "btmrvl_main_service"); 612 613 priv->btmrvl_dev.card = card; 614 priv->btmrvl_dev.tx_dnld_rdy = true; 615 616 return priv; 617 618 err_adapter: 619 kfree(priv); 620 621 err_priv: 622 return NULL; 623 } 624 EXPORT_SYMBOL_GPL(btmrvl_add_card); 625 626 int btmrvl_remove_card(struct btmrvl_private *priv) 627 { 628 struct hci_dev *hdev; 629 630 hdev = priv->btmrvl_dev.hcidev; 631 632 wake_up_interruptible(&priv->adapter->cmd_wait_q); 633 634 kthread_stop(priv->main_thread.task); 635 636 #ifdef CONFIG_DEBUG_FS 637 btmrvl_debugfs_remove(hdev); 638 #endif 639 640 hci_unregister_dev(hdev); 641 642 hci_free_dev(hdev); 643 644 priv->btmrvl_dev.hcidev = NULL; 645 646 btmrvl_free_adapter(priv); 647 648 kfree(priv); 649 650 return 0; 651 } 652 EXPORT_SYMBOL_GPL(btmrvl_remove_card); 653 654 MODULE_AUTHOR("Marvell International Ltd."); 655 MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION); 656 MODULE_VERSION(VERSION); 657 MODULE_LICENSE("GPL v2"); 658