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_enable_ps(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 == NULL) { 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_AUTO_SLEEP_MODE)); 217 cmd->length = 1; 218 219 if (priv->btmrvl_dev.psmode) 220 cmd->data[0] = BT_PS_ENABLE; 221 else 222 cmd->data[0] = BT_PS_DISABLE; 223 224 bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; 225 226 skb->dev = (void *) priv->btmrvl_dev.hcidev; 227 skb_queue_head(&priv->adapter->tx_queue, skb); 228 229 BT_DBG("Queue PSMODE Command:%d", cmd->data[0]); 230 231 return 0; 232 } 233 EXPORT_SYMBOL_GPL(btmrvl_enable_ps); 234 235 static int btmrvl_enable_hs(struct btmrvl_private *priv) 236 { 237 struct sk_buff *skb; 238 struct btmrvl_cmd *cmd; 239 int ret = 0; 240 241 skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); 242 if (skb == NULL) { 243 BT_ERR("No free skb"); 244 return -ENOMEM; 245 } 246 247 cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd)); 248 cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_HOST_SLEEP_ENABLE)); 249 cmd->length = 0; 250 251 bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; 252 253 skb->dev = (void *) priv->btmrvl_dev.hcidev; 254 skb_queue_head(&priv->adapter->tx_queue, skb); 255 256 BT_DBG("Queue hs enable Command"); 257 258 wake_up_interruptible(&priv->main_thread.wait_q); 259 260 if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q, 261 priv->adapter->hs_state, 262 msecs_to_jiffies(WAIT_UNTIL_HS_STATE_CHANGED))) { 263 ret = -ETIMEDOUT; 264 BT_ERR("timeout: %d, %d,%d", priv->adapter->hs_state, 265 priv->adapter->ps_state, 266 priv->adapter->wakeup_tries); 267 } 268 269 return ret; 270 } 271 272 int btmrvl_prepare_command(struct btmrvl_private *priv) 273 { 274 struct sk_buff *skb = NULL; 275 struct btmrvl_cmd *cmd; 276 int ret = 0; 277 278 if (priv->btmrvl_dev.hscfgcmd) { 279 priv->btmrvl_dev.hscfgcmd = 0; 280 281 skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); 282 if (skb == NULL) { 283 BT_ERR("No free skb"); 284 return -ENOMEM; 285 } 286 287 cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd)); 288 cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_HOST_SLEEP_CONFIG)); 289 cmd->length = 2; 290 cmd->data[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8; 291 cmd->data[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff); 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 HSCFG Command, gpio=0x%x, gap=0x%x", 299 cmd->data[0], cmd->data[1]); 300 } 301 302 if (priv->btmrvl_dev.pscmd) { 303 priv->btmrvl_dev.pscmd = 0; 304 btmrvl_enable_ps(priv); 305 } 306 307 if (priv->btmrvl_dev.hscmd) { 308 priv->btmrvl_dev.hscmd = 0; 309 310 if (priv->btmrvl_dev.hsmode) { 311 ret = btmrvl_enable_hs(priv); 312 } else { 313 ret = priv->hw_wakeup_firmware(priv); 314 priv->adapter->hs_state = HS_DEACTIVATED; 315 } 316 } 317 318 return ret; 319 } 320 321 static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb) 322 { 323 int ret = 0; 324 325 if (!skb || !skb->data) 326 return -EINVAL; 327 328 if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) { 329 BT_ERR("Tx Error: Bad skb length %d : %d", 330 skb->len, BTM_UPLD_SIZE); 331 return -EINVAL; 332 } 333 334 if (skb_headroom(skb) < BTM_HEADER_LEN) { 335 struct sk_buff *tmp = skb; 336 337 skb = skb_realloc_headroom(skb, BTM_HEADER_LEN); 338 if (!skb) { 339 BT_ERR("Tx Error: realloc_headroom failed %d", 340 BTM_HEADER_LEN); 341 skb = tmp; 342 return -EINVAL; 343 } 344 345 kfree_skb(tmp); 346 } 347 348 skb_push(skb, BTM_HEADER_LEN); 349 350 /* header type: byte[3] 351 * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor 352 * header length: byte[2][1][0] 353 */ 354 355 skb->data[0] = (skb->len & 0x0000ff); 356 skb->data[1] = (skb->len & 0x00ff00) >> 8; 357 skb->data[2] = (skb->len & 0xff0000) >> 16; 358 skb->data[3] = bt_cb(skb)->pkt_type; 359 360 if (priv->hw_host_to_card) 361 ret = priv->hw_host_to_card(priv, skb->data, skb->len); 362 363 return ret; 364 } 365 366 static void btmrvl_init_adapter(struct btmrvl_private *priv) 367 { 368 skb_queue_head_init(&priv->adapter->tx_queue); 369 370 priv->adapter->ps_state = PS_AWAKE; 371 372 init_waitqueue_head(&priv->adapter->cmd_wait_q); 373 } 374 375 static void btmrvl_free_adapter(struct btmrvl_private *priv) 376 { 377 skb_queue_purge(&priv->adapter->tx_queue); 378 379 kfree(priv->adapter); 380 381 priv->adapter = NULL; 382 } 383 384 static int btmrvl_ioctl(struct hci_dev *hdev, 385 unsigned int cmd, unsigned long arg) 386 { 387 return -ENOIOCTLCMD; 388 } 389 390 static int btmrvl_send_frame(struct sk_buff *skb) 391 { 392 struct hci_dev *hdev = (struct hci_dev *) skb->dev; 393 struct btmrvl_private *priv = NULL; 394 395 BT_DBG("type=%d, len=%d", skb->pkt_type, skb->len); 396 397 if (!hdev) { 398 BT_ERR("Frame for unknown HCI device"); 399 return -ENODEV; 400 } 401 402 priv = hci_get_drvdata(hdev); 403 404 if (!test_bit(HCI_RUNNING, &hdev->flags)) { 405 BT_ERR("Failed testing HCI_RUNING, flags=%lx", hdev->flags); 406 print_hex_dump_bytes("data: ", DUMP_PREFIX_OFFSET, 407 skb->data, skb->len); 408 return -EBUSY; 409 } 410 411 switch (bt_cb(skb)->pkt_type) { 412 case HCI_COMMAND_PKT: 413 hdev->stat.cmd_tx++; 414 break; 415 416 case HCI_ACLDATA_PKT: 417 hdev->stat.acl_tx++; 418 break; 419 420 case HCI_SCODATA_PKT: 421 hdev->stat.sco_tx++; 422 break; 423 } 424 425 skb_queue_tail(&priv->adapter->tx_queue, skb); 426 427 wake_up_interruptible(&priv->main_thread.wait_q); 428 429 return 0; 430 } 431 432 static int btmrvl_flush(struct hci_dev *hdev) 433 { 434 struct btmrvl_private *priv = hci_get_drvdata(hdev); 435 436 skb_queue_purge(&priv->adapter->tx_queue); 437 438 return 0; 439 } 440 441 static int btmrvl_close(struct hci_dev *hdev) 442 { 443 struct btmrvl_private *priv = hci_get_drvdata(hdev); 444 445 if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags)) 446 return 0; 447 448 skb_queue_purge(&priv->adapter->tx_queue); 449 450 return 0; 451 } 452 453 static int btmrvl_open(struct hci_dev *hdev) 454 { 455 set_bit(HCI_RUNNING, &hdev->flags); 456 457 return 0; 458 } 459 460 /* 461 * This function handles the event generated by firmware, rx data 462 * received from firmware, and tx data sent from kernel. 463 */ 464 static int btmrvl_service_main_thread(void *data) 465 { 466 struct btmrvl_thread *thread = data; 467 struct btmrvl_private *priv = thread->priv; 468 struct btmrvl_adapter *adapter = priv->adapter; 469 wait_queue_t wait; 470 struct sk_buff *skb; 471 ulong flags; 472 473 init_waitqueue_entry(&wait, current); 474 475 for (;;) { 476 add_wait_queue(&thread->wait_q, &wait); 477 478 set_current_state(TASK_INTERRUPTIBLE); 479 480 if (adapter->wakeup_tries || 481 ((!adapter->int_count) && 482 (!priv->btmrvl_dev.tx_dnld_rdy || 483 skb_queue_empty(&adapter->tx_queue)))) { 484 BT_DBG("main_thread is sleeping..."); 485 schedule(); 486 } 487 488 set_current_state(TASK_RUNNING); 489 490 remove_wait_queue(&thread->wait_q, &wait); 491 492 BT_DBG("main_thread woke up"); 493 494 if (kthread_should_stop()) { 495 BT_DBG("main_thread: break from main thread"); 496 break; 497 } 498 499 spin_lock_irqsave(&priv->driver_lock, flags); 500 if (adapter->int_count) { 501 adapter->int_count = 0; 502 spin_unlock_irqrestore(&priv->driver_lock, flags); 503 priv->hw_process_int_status(priv); 504 } else if (adapter->ps_state == PS_SLEEP && 505 !skb_queue_empty(&adapter->tx_queue)) { 506 spin_unlock_irqrestore(&priv->driver_lock, flags); 507 adapter->wakeup_tries++; 508 priv->hw_wakeup_firmware(priv); 509 continue; 510 } else { 511 spin_unlock_irqrestore(&priv->driver_lock, flags); 512 } 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 hci_set_drvdata(hdev, 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->ioctl = btmrvl_ioctl; 554 555 btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ); 556 557 hdev->dev_type = priv->btmrvl_dev.dev_type; 558 559 ret = hci_register_dev(hdev); 560 if (ret < 0) { 561 BT_ERR("Can not register HCI device"); 562 goto err_hci_register_dev; 563 } 564 565 #ifdef CONFIG_DEBUG_FS 566 btmrvl_debugfs_init(hdev); 567 #endif 568 569 return 0; 570 571 err_hci_register_dev: 572 hci_free_dev(hdev); 573 574 err_hdev: 575 /* Stop the thread servicing the interrupts */ 576 kthread_stop(priv->main_thread.task); 577 578 btmrvl_free_adapter(priv); 579 kfree(priv); 580 581 return -ENOMEM; 582 } 583 EXPORT_SYMBOL_GPL(btmrvl_register_hdev); 584 585 struct btmrvl_private *btmrvl_add_card(void *card) 586 { 587 struct btmrvl_private *priv; 588 589 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 590 if (!priv) { 591 BT_ERR("Can not allocate priv"); 592 goto err_priv; 593 } 594 595 priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL); 596 if (!priv->adapter) { 597 BT_ERR("Allocate buffer for btmrvl_adapter failed!"); 598 goto err_adapter; 599 } 600 601 btmrvl_init_adapter(priv); 602 603 BT_DBG("Starting kthread..."); 604 priv->main_thread.priv = priv; 605 spin_lock_init(&priv->driver_lock); 606 607 init_waitqueue_head(&priv->main_thread.wait_q); 608 priv->main_thread.task = kthread_run(btmrvl_service_main_thread, 609 &priv->main_thread, "btmrvl_main_service"); 610 611 priv->btmrvl_dev.card = card; 612 priv->btmrvl_dev.tx_dnld_rdy = true; 613 614 return priv; 615 616 err_adapter: 617 kfree(priv); 618 619 err_priv: 620 return NULL; 621 } 622 EXPORT_SYMBOL_GPL(btmrvl_add_card); 623 624 int btmrvl_remove_card(struct btmrvl_private *priv) 625 { 626 struct hci_dev *hdev; 627 628 hdev = priv->btmrvl_dev.hcidev; 629 630 wake_up_interruptible(&priv->adapter->cmd_wait_q); 631 632 kthread_stop(priv->main_thread.task); 633 634 #ifdef CONFIG_DEBUG_FS 635 btmrvl_debugfs_remove(hdev); 636 #endif 637 638 hci_unregister_dev(hdev); 639 640 hci_free_dev(hdev); 641 642 priv->btmrvl_dev.hcidev = NULL; 643 644 btmrvl_free_adapter(priv); 645 646 kfree(priv); 647 648 return 0; 649 } 650 EXPORT_SYMBOL_GPL(btmrvl_remove_card); 651 652 MODULE_AUTHOR("Marvell International Ltd."); 653 MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION); 654 MODULE_VERSION(VERSION); 655 MODULE_LICENSE("GPL v2"); 656