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