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 23 #include <net/bluetooth/bluetooth.h> 24 #include <net/bluetooth/hci_core.h> 25 26 #include "btmrvl_drv.h" 27 28 #define VERSION "1.0" 29 30 /* 31 * This function is called by interface specific interrupt handler. 32 * It updates Power Save & Host Sleep states, and wakes up the main 33 * thread. 34 */ 35 void btmrvl_interrupt(struct btmrvl_private *priv) 36 { 37 priv->adapter->ps_state = PS_AWAKE; 38 39 priv->adapter->wakeup_tries = 0; 40 41 priv->adapter->int_count++; 42 43 wake_up_interruptible(&priv->main_thread.wait_q); 44 } 45 EXPORT_SYMBOL_GPL(btmrvl_interrupt); 46 47 bool btmrvl_check_evtpkt(struct btmrvl_private *priv, struct sk_buff *skb) 48 { 49 struct hci_event_hdr *hdr = (void *) skb->data; 50 51 if (hdr->evt == HCI_EV_CMD_COMPLETE) { 52 struct hci_ev_cmd_complete *ec; 53 u16 opcode, ocf, ogf; 54 55 ec = (void *) (skb->data + HCI_EVENT_HDR_SIZE); 56 opcode = __le16_to_cpu(ec->opcode); 57 ocf = hci_opcode_ocf(opcode); 58 ogf = hci_opcode_ogf(opcode); 59 60 if (ocf == BT_CMD_MODULE_CFG_REQ && 61 priv->btmrvl_dev.sendcmdflag) { 62 priv->btmrvl_dev.sendcmdflag = false; 63 priv->adapter->cmd_complete = true; 64 wake_up_interruptible(&priv->adapter->cmd_wait_q); 65 } 66 67 if (ogf == OGF) { 68 BT_DBG("vendor event skipped: ogf 0x%4.4x ocf 0x%4.4x", 69 ogf, ocf); 70 kfree_skb(skb); 71 return false; 72 } 73 } 74 75 return true; 76 } 77 EXPORT_SYMBOL_GPL(btmrvl_check_evtpkt); 78 79 int btmrvl_process_event(struct btmrvl_private *priv, struct sk_buff *skb) 80 { 81 struct btmrvl_adapter *adapter = priv->adapter; 82 struct btmrvl_event *event; 83 int ret = 0; 84 85 event = (struct btmrvl_event *) skb->data; 86 if (event->ec != 0xff) { 87 BT_DBG("Not Marvell Event=%x", event->ec); 88 ret = -EINVAL; 89 goto exit; 90 } 91 92 switch (event->data[0]) { 93 case BT_CMD_AUTO_SLEEP_MODE: 94 if (!event->data[2]) { 95 if (event->data[1] == BT_PS_ENABLE) 96 adapter->psmode = 1; 97 else 98 adapter->psmode = 0; 99 BT_DBG("PS Mode:%s", 100 (adapter->psmode) ? "Enable" : "Disable"); 101 } else { 102 BT_DBG("PS Mode command failed"); 103 } 104 break; 105 106 case BT_CMD_HOST_SLEEP_CONFIG: 107 if (!event->data[3]) 108 BT_DBG("gpio=%x, gap=%x", event->data[1], 109 event->data[2]); 110 else 111 BT_DBG("HSCFG command failed"); 112 break; 113 114 case BT_CMD_HOST_SLEEP_ENABLE: 115 if (!event->data[1]) { 116 adapter->hs_state = HS_ACTIVATED; 117 if (adapter->psmode) 118 adapter->ps_state = PS_SLEEP; 119 wake_up_interruptible(&adapter->cmd_wait_q); 120 BT_DBG("HS ACTIVATED!"); 121 } else { 122 BT_DBG("HS Enable failed"); 123 } 124 break; 125 126 case BT_CMD_MODULE_CFG_REQ: 127 if (priv->btmrvl_dev.sendcmdflag && 128 event->data[1] == MODULE_BRINGUP_REQ) { 129 BT_DBG("EVENT:%s", 130 ((event->data[2] == MODULE_BROUGHT_UP) || 131 (event->data[2] == MODULE_ALREADY_UP)) ? 132 "Bring-up succeed" : "Bring-up failed"); 133 134 if (event->length > 3 && event->data[3]) 135 priv->btmrvl_dev.dev_type = HCI_AMP; 136 else 137 priv->btmrvl_dev.dev_type = HCI_BREDR; 138 139 BT_DBG("dev_type: %d", priv->btmrvl_dev.dev_type); 140 } else if (priv->btmrvl_dev.sendcmdflag && 141 event->data[1] == MODULE_SHUTDOWN_REQ) { 142 BT_DBG("EVENT:%s", (event->data[2]) ? 143 "Shutdown failed" : "Shutdown succeed"); 144 } else { 145 BT_DBG("BT_CMD_MODULE_CFG_REQ resp for APP"); 146 ret = -EINVAL; 147 } 148 break; 149 150 case BT_EVENT_POWER_STATE: 151 if (event->data[1] == BT_PS_SLEEP) 152 adapter->ps_state = PS_SLEEP; 153 BT_DBG("EVENT:%s", 154 (adapter->ps_state) ? "PS_SLEEP" : "PS_AWAKE"); 155 break; 156 157 default: 158 BT_DBG("Unknown Event=%d", event->data[0]); 159 ret = -EINVAL; 160 break; 161 } 162 163 exit: 164 if (!ret) 165 kfree_skb(skb); 166 167 return ret; 168 } 169 EXPORT_SYMBOL_GPL(btmrvl_process_event); 170 171 int btmrvl_send_module_cfg_cmd(struct btmrvl_private *priv, int subcmd) 172 { 173 struct sk_buff *skb; 174 struct btmrvl_cmd *cmd; 175 int ret = 0; 176 177 skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); 178 if (skb == NULL) { 179 BT_ERR("No free skb"); 180 return -ENOMEM; 181 } 182 183 cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd)); 184 cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_MODULE_CFG_REQ)); 185 cmd->length = 1; 186 cmd->data[0] = subcmd; 187 188 bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; 189 190 skb->dev = (void *) priv->btmrvl_dev.hcidev; 191 skb_queue_head(&priv->adapter->tx_queue, skb); 192 193 priv->btmrvl_dev.sendcmdflag = true; 194 195 priv->adapter->cmd_complete = false; 196 197 BT_DBG("Queue module cfg Command"); 198 199 wake_up_interruptible(&priv->main_thread.wait_q); 200 201 if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q, 202 priv->adapter->cmd_complete, 203 msecs_to_jiffies(WAIT_UNTIL_CMD_RESP))) { 204 ret = -ETIMEDOUT; 205 BT_ERR("module_cfg_cmd(%x): timeout: %d", 206 subcmd, priv->btmrvl_dev.sendcmdflag); 207 } 208 209 BT_DBG("module cfg Command done"); 210 211 return ret; 212 } 213 EXPORT_SYMBOL_GPL(btmrvl_send_module_cfg_cmd); 214 215 int btmrvl_send_hscfg_cmd(struct btmrvl_private *priv) 216 { 217 struct sk_buff *skb; 218 struct btmrvl_cmd *cmd; 219 220 skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); 221 if (!skb) { 222 BT_ERR("No free skb"); 223 return -ENOMEM; 224 } 225 226 cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd)); 227 cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, 228 BT_CMD_HOST_SLEEP_CONFIG)); 229 cmd->length = 2; 230 cmd->data[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8; 231 cmd->data[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff); 232 233 bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; 234 235 skb->dev = (void *) priv->btmrvl_dev.hcidev; 236 skb_queue_head(&priv->adapter->tx_queue, skb); 237 238 BT_DBG("Queue HSCFG Command, gpio=0x%x, gap=0x%x", cmd->data[0], 239 cmd->data[1]); 240 241 return 0; 242 } 243 EXPORT_SYMBOL_GPL(btmrvl_send_hscfg_cmd); 244 245 int btmrvl_enable_ps(struct btmrvl_private *priv) 246 { 247 struct sk_buff *skb; 248 struct btmrvl_cmd *cmd; 249 250 skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); 251 if (skb == NULL) { 252 BT_ERR("No free skb"); 253 return -ENOMEM; 254 } 255 256 cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd)); 257 cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, 258 BT_CMD_AUTO_SLEEP_MODE)); 259 cmd->length = 1; 260 261 if (priv->btmrvl_dev.psmode) 262 cmd->data[0] = BT_PS_ENABLE; 263 else 264 cmd->data[0] = BT_PS_DISABLE; 265 266 bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; 267 268 skb->dev = (void *) priv->btmrvl_dev.hcidev; 269 skb_queue_head(&priv->adapter->tx_queue, skb); 270 271 BT_DBG("Queue PSMODE Command:%d", cmd->data[0]); 272 273 return 0; 274 } 275 EXPORT_SYMBOL_GPL(btmrvl_enable_ps); 276 277 int btmrvl_enable_hs(struct btmrvl_private *priv) 278 { 279 struct sk_buff *skb; 280 struct btmrvl_cmd *cmd; 281 int ret = 0; 282 283 skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); 284 if (skb == NULL) { 285 BT_ERR("No free skb"); 286 return -ENOMEM; 287 } 288 289 cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd)); 290 cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_HOST_SLEEP_ENABLE)); 291 cmd->length = 0; 292 293 bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; 294 295 skb->dev = (void *) priv->btmrvl_dev.hcidev; 296 skb_queue_head(&priv->adapter->tx_queue, skb); 297 298 BT_DBG("Queue hs enable Command"); 299 300 wake_up_interruptible(&priv->main_thread.wait_q); 301 302 if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q, 303 priv->adapter->hs_state, 304 msecs_to_jiffies(WAIT_UNTIL_HS_STATE_CHANGED))) { 305 ret = -ETIMEDOUT; 306 BT_ERR("timeout: %d, %d,%d", priv->adapter->hs_state, 307 priv->adapter->ps_state, 308 priv->adapter->wakeup_tries); 309 } 310 311 return ret; 312 } 313 EXPORT_SYMBOL_GPL(btmrvl_enable_hs); 314 315 int btmrvl_prepare_command(struct btmrvl_private *priv) 316 { 317 int ret = 0; 318 319 if (priv->btmrvl_dev.hscfgcmd) { 320 priv->btmrvl_dev.hscfgcmd = 0; 321 btmrvl_send_hscfg_cmd(priv); 322 } 323 324 if (priv->btmrvl_dev.pscmd) { 325 priv->btmrvl_dev.pscmd = 0; 326 btmrvl_enable_ps(priv); 327 } 328 329 if (priv->btmrvl_dev.hscmd) { 330 priv->btmrvl_dev.hscmd = 0; 331 332 if (priv->btmrvl_dev.hsmode) { 333 ret = btmrvl_enable_hs(priv); 334 } else { 335 ret = priv->hw_wakeup_firmware(priv); 336 priv->adapter->hs_state = HS_DEACTIVATED; 337 } 338 } 339 340 return ret; 341 } 342 343 static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb) 344 { 345 int ret = 0; 346 347 if (!skb || !skb->data) 348 return -EINVAL; 349 350 if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) { 351 BT_ERR("Tx Error: Bad skb length %d : %d", 352 skb->len, BTM_UPLD_SIZE); 353 return -EINVAL; 354 } 355 356 if (skb_headroom(skb) < BTM_HEADER_LEN) { 357 struct sk_buff *tmp = skb; 358 359 skb = skb_realloc_headroom(skb, BTM_HEADER_LEN); 360 if (!skb) { 361 BT_ERR("Tx Error: realloc_headroom failed %d", 362 BTM_HEADER_LEN); 363 skb = tmp; 364 return -EINVAL; 365 } 366 367 kfree_skb(tmp); 368 } 369 370 skb_push(skb, BTM_HEADER_LEN); 371 372 /* header type: byte[3] 373 * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor 374 * header length: byte[2][1][0] 375 */ 376 377 skb->data[0] = (skb->len & 0x0000ff); 378 skb->data[1] = (skb->len & 0x00ff00) >> 8; 379 skb->data[2] = (skb->len & 0xff0000) >> 16; 380 skb->data[3] = bt_cb(skb)->pkt_type; 381 382 if (priv->hw_host_to_card) 383 ret = priv->hw_host_to_card(priv, skb->data, skb->len); 384 385 return ret; 386 } 387 388 static void btmrvl_init_adapter(struct btmrvl_private *priv) 389 { 390 skb_queue_head_init(&priv->adapter->tx_queue); 391 392 priv->adapter->ps_state = PS_AWAKE; 393 394 init_waitqueue_head(&priv->adapter->cmd_wait_q); 395 } 396 397 static void btmrvl_free_adapter(struct btmrvl_private *priv) 398 { 399 skb_queue_purge(&priv->adapter->tx_queue); 400 401 kfree(priv->adapter); 402 403 priv->adapter = NULL; 404 } 405 406 static int btmrvl_ioctl(struct hci_dev *hdev, 407 unsigned int cmd, unsigned long arg) 408 { 409 return -ENOIOCTLCMD; 410 } 411 412 static int btmrvl_send_frame(struct sk_buff *skb) 413 { 414 struct hci_dev *hdev = (struct hci_dev *) skb->dev; 415 struct btmrvl_private *priv = NULL; 416 417 BT_DBG("type=%d, len=%d", skb->pkt_type, skb->len); 418 419 if (!hdev) { 420 BT_ERR("Frame for unknown HCI device"); 421 return -ENODEV; 422 } 423 424 priv = hci_get_drvdata(hdev); 425 426 if (!test_bit(HCI_RUNNING, &hdev->flags)) { 427 BT_ERR("Failed testing HCI_RUNING, flags=%lx", hdev->flags); 428 print_hex_dump_bytes("data: ", DUMP_PREFIX_OFFSET, 429 skb->data, skb->len); 430 return -EBUSY; 431 } 432 433 switch (bt_cb(skb)->pkt_type) { 434 case HCI_COMMAND_PKT: 435 hdev->stat.cmd_tx++; 436 break; 437 438 case HCI_ACLDATA_PKT: 439 hdev->stat.acl_tx++; 440 break; 441 442 case HCI_SCODATA_PKT: 443 hdev->stat.sco_tx++; 444 break; 445 } 446 447 skb_queue_tail(&priv->adapter->tx_queue, skb); 448 449 wake_up_interruptible(&priv->main_thread.wait_q); 450 451 return 0; 452 } 453 454 static int btmrvl_flush(struct hci_dev *hdev) 455 { 456 struct btmrvl_private *priv = hci_get_drvdata(hdev); 457 458 skb_queue_purge(&priv->adapter->tx_queue); 459 460 return 0; 461 } 462 463 static int btmrvl_close(struct hci_dev *hdev) 464 { 465 struct btmrvl_private *priv = hci_get_drvdata(hdev); 466 467 if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags)) 468 return 0; 469 470 skb_queue_purge(&priv->adapter->tx_queue); 471 472 return 0; 473 } 474 475 static int btmrvl_open(struct hci_dev *hdev) 476 { 477 set_bit(HCI_RUNNING, &hdev->flags); 478 479 return 0; 480 } 481 482 /* 483 * This function handles the event generated by firmware, rx data 484 * received from firmware, and tx data sent from kernel. 485 */ 486 static int btmrvl_service_main_thread(void *data) 487 { 488 struct btmrvl_thread *thread = data; 489 struct btmrvl_private *priv = thread->priv; 490 struct btmrvl_adapter *adapter = priv->adapter; 491 wait_queue_t wait; 492 struct sk_buff *skb; 493 ulong flags; 494 495 init_waitqueue_entry(&wait, current); 496 497 for (;;) { 498 add_wait_queue(&thread->wait_q, &wait); 499 500 set_current_state(TASK_INTERRUPTIBLE); 501 502 if (adapter->wakeup_tries || 503 ((!adapter->int_count) && 504 (!priv->btmrvl_dev.tx_dnld_rdy || 505 skb_queue_empty(&adapter->tx_queue)))) { 506 BT_DBG("main_thread is sleeping..."); 507 schedule(); 508 } 509 510 set_current_state(TASK_RUNNING); 511 512 remove_wait_queue(&thread->wait_q, &wait); 513 514 BT_DBG("main_thread woke up"); 515 516 if (kthread_should_stop()) { 517 BT_DBG("main_thread: break from main thread"); 518 break; 519 } 520 521 spin_lock_irqsave(&priv->driver_lock, flags); 522 if (adapter->int_count) { 523 adapter->int_count = 0; 524 spin_unlock_irqrestore(&priv->driver_lock, flags); 525 priv->hw_process_int_status(priv); 526 } else if (adapter->ps_state == PS_SLEEP && 527 !skb_queue_empty(&adapter->tx_queue)) { 528 spin_unlock_irqrestore(&priv->driver_lock, flags); 529 adapter->wakeup_tries++; 530 priv->hw_wakeup_firmware(priv); 531 continue; 532 } else { 533 spin_unlock_irqrestore(&priv->driver_lock, flags); 534 } 535 536 if (adapter->ps_state == PS_SLEEP) 537 continue; 538 539 if (!priv->btmrvl_dev.tx_dnld_rdy) 540 continue; 541 542 skb = skb_dequeue(&adapter->tx_queue); 543 if (skb) { 544 if (btmrvl_tx_pkt(priv, skb)) 545 priv->btmrvl_dev.hcidev->stat.err_tx++; 546 else 547 priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len; 548 549 kfree_skb(skb); 550 } 551 } 552 553 return 0; 554 } 555 556 int btmrvl_register_hdev(struct btmrvl_private *priv) 557 { 558 struct hci_dev *hdev = NULL; 559 int ret; 560 561 hdev = hci_alloc_dev(); 562 if (!hdev) { 563 BT_ERR("Can not allocate HCI device"); 564 goto err_hdev; 565 } 566 567 priv->btmrvl_dev.hcidev = hdev; 568 hci_set_drvdata(hdev, priv); 569 570 hdev->bus = HCI_SDIO; 571 hdev->open = btmrvl_open; 572 hdev->close = btmrvl_close; 573 hdev->flush = btmrvl_flush; 574 hdev->send = btmrvl_send_frame; 575 hdev->ioctl = btmrvl_ioctl; 576 577 btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ); 578 579 hdev->dev_type = priv->btmrvl_dev.dev_type; 580 581 ret = hci_register_dev(hdev); 582 if (ret < 0) { 583 BT_ERR("Can not register HCI device"); 584 goto err_hci_register_dev; 585 } 586 587 #ifdef CONFIG_DEBUG_FS 588 btmrvl_debugfs_init(hdev); 589 #endif 590 591 return 0; 592 593 err_hci_register_dev: 594 hci_free_dev(hdev); 595 596 err_hdev: 597 /* Stop the thread servicing the interrupts */ 598 kthread_stop(priv->main_thread.task); 599 600 btmrvl_free_adapter(priv); 601 kfree(priv); 602 603 return -ENOMEM; 604 } 605 EXPORT_SYMBOL_GPL(btmrvl_register_hdev); 606 607 struct btmrvl_private *btmrvl_add_card(void *card) 608 { 609 struct btmrvl_private *priv; 610 611 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 612 if (!priv) { 613 BT_ERR("Can not allocate priv"); 614 goto err_priv; 615 } 616 617 priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL); 618 if (!priv->adapter) { 619 BT_ERR("Allocate buffer for btmrvl_adapter failed!"); 620 goto err_adapter; 621 } 622 623 btmrvl_init_adapter(priv); 624 625 BT_DBG("Starting kthread..."); 626 priv->main_thread.priv = priv; 627 spin_lock_init(&priv->driver_lock); 628 629 init_waitqueue_head(&priv->main_thread.wait_q); 630 priv->main_thread.task = kthread_run(btmrvl_service_main_thread, 631 &priv->main_thread, "btmrvl_main_service"); 632 633 priv->btmrvl_dev.card = card; 634 priv->btmrvl_dev.tx_dnld_rdy = true; 635 636 return priv; 637 638 err_adapter: 639 kfree(priv); 640 641 err_priv: 642 return NULL; 643 } 644 EXPORT_SYMBOL_GPL(btmrvl_add_card); 645 646 int btmrvl_remove_card(struct btmrvl_private *priv) 647 { 648 struct hci_dev *hdev; 649 650 hdev = priv->btmrvl_dev.hcidev; 651 652 wake_up_interruptible(&priv->adapter->cmd_wait_q); 653 654 kthread_stop(priv->main_thread.task); 655 656 #ifdef CONFIG_DEBUG_FS 657 btmrvl_debugfs_remove(hdev); 658 #endif 659 660 hci_unregister_dev(hdev); 661 662 hci_free_dev(hdev); 663 664 priv->btmrvl_dev.hcidev = NULL; 665 666 btmrvl_free_adapter(priv); 667 668 kfree(priv); 669 670 return 0; 671 } 672 EXPORT_SYMBOL_GPL(btmrvl_remove_card); 673 674 MODULE_AUTHOR("Marvell International Ltd."); 675 MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION); 676 MODULE_VERSION(VERSION); 677 MODULE_LICENSE("GPL v2"); 678