1 /* 2 * 3 * Bluetooth HCI UART driver 4 * 5 * Copyright (C) 2000-2001 Qualcomm Incorporated 6 * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com> 7 * Copyright (C) 2004-2005 Marcel Holtmann <marcel@holtmann.org> 8 * 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 * 24 */ 25 26 #include <linux/module.h> 27 28 #include <linux/kernel.h> 29 #include <linux/init.h> 30 #include <linux/types.h> 31 #include <linux/fcntl.h> 32 #include <linux/interrupt.h> 33 #include <linux/ptrace.h> 34 #include <linux/poll.h> 35 36 #include <linux/slab.h> 37 #include <linux/tty.h> 38 #include <linux/errno.h> 39 #include <linux/string.h> 40 #include <linux/signal.h> 41 #include <linux/ioctl.h> 42 #include <linux/skbuff.h> 43 #include <linux/firmware.h> 44 45 #include <net/bluetooth/bluetooth.h> 46 #include <net/bluetooth/hci_core.h> 47 48 #include "btintel.h" 49 #include "btbcm.h" 50 #include "hci_uart.h" 51 52 #define VERSION "2.3" 53 54 static const struct hci_uart_proto *hup[HCI_UART_MAX_PROTO]; 55 56 int hci_uart_register_proto(const struct hci_uart_proto *p) 57 { 58 if (p->id >= HCI_UART_MAX_PROTO) 59 return -EINVAL; 60 61 if (hup[p->id]) 62 return -EEXIST; 63 64 hup[p->id] = p; 65 66 BT_INFO("HCI UART protocol %s registered", p->name); 67 68 return 0; 69 } 70 71 int hci_uart_unregister_proto(const struct hci_uart_proto *p) 72 { 73 if (p->id >= HCI_UART_MAX_PROTO) 74 return -EINVAL; 75 76 if (!hup[p->id]) 77 return -EINVAL; 78 79 hup[p->id] = NULL; 80 81 return 0; 82 } 83 84 static const struct hci_uart_proto *hci_uart_get_proto(unsigned int id) 85 { 86 if (id >= HCI_UART_MAX_PROTO) 87 return NULL; 88 89 return hup[id]; 90 } 91 92 static inline void hci_uart_tx_complete(struct hci_uart *hu, int pkt_type) 93 { 94 struct hci_dev *hdev = hu->hdev; 95 96 /* Update HCI stat counters */ 97 switch (pkt_type) { 98 case HCI_COMMAND_PKT: 99 hdev->stat.cmd_tx++; 100 break; 101 102 case HCI_ACLDATA_PKT: 103 hdev->stat.acl_tx++; 104 break; 105 106 case HCI_SCODATA_PKT: 107 hdev->stat.sco_tx++; 108 break; 109 } 110 } 111 112 static inline struct sk_buff *hci_uart_dequeue(struct hci_uart *hu) 113 { 114 struct sk_buff *skb = hu->tx_skb; 115 116 if (!skb) 117 skb = hu->proto->dequeue(hu); 118 else 119 hu->tx_skb = NULL; 120 121 return skb; 122 } 123 124 int hci_uart_tx_wakeup(struct hci_uart *hu) 125 { 126 if (test_and_set_bit(HCI_UART_SENDING, &hu->tx_state)) { 127 set_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); 128 return 0; 129 } 130 131 BT_DBG(""); 132 133 schedule_work(&hu->write_work); 134 135 return 0; 136 } 137 138 static void hci_uart_write_work(struct work_struct *work) 139 { 140 struct hci_uart *hu = container_of(work, struct hci_uart, write_work); 141 struct tty_struct *tty = hu->tty; 142 struct hci_dev *hdev = hu->hdev; 143 struct sk_buff *skb; 144 145 /* REVISIT: should we cope with bad skbs or ->write() returning 146 * and error value ? 147 */ 148 149 restart: 150 clear_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); 151 152 while ((skb = hci_uart_dequeue(hu))) { 153 int len; 154 155 set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); 156 len = tty->ops->write(tty, skb->data, skb->len); 157 hdev->stat.byte_tx += len; 158 159 skb_pull(skb, len); 160 if (skb->len) { 161 hu->tx_skb = skb; 162 break; 163 } 164 165 hci_uart_tx_complete(hu, hci_skb_pkt_type(skb)); 166 kfree_skb(skb); 167 } 168 169 if (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state)) 170 goto restart; 171 172 clear_bit(HCI_UART_SENDING, &hu->tx_state); 173 } 174 175 static void hci_uart_init_work(struct work_struct *work) 176 { 177 struct hci_uart *hu = container_of(work, struct hci_uart, init_ready); 178 int err; 179 180 if (!test_and_clear_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) 181 return; 182 183 err = hci_register_dev(hu->hdev); 184 if (err < 0) { 185 BT_ERR("Can't register HCI device"); 186 hci_free_dev(hu->hdev); 187 hu->hdev = NULL; 188 hu->proto->close(hu); 189 } 190 191 set_bit(HCI_UART_REGISTERED, &hu->flags); 192 } 193 194 int hci_uart_init_ready(struct hci_uart *hu) 195 { 196 if (!test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) 197 return -EALREADY; 198 199 schedule_work(&hu->init_ready); 200 201 return 0; 202 } 203 204 /* ------- Interface to HCI layer ------ */ 205 /* Initialize device */ 206 static int hci_uart_open(struct hci_dev *hdev) 207 { 208 BT_DBG("%s %p", hdev->name, hdev); 209 210 /* Nothing to do for UART driver */ 211 return 0; 212 } 213 214 /* Reset device */ 215 static int hci_uart_flush(struct hci_dev *hdev) 216 { 217 struct hci_uart *hu = hci_get_drvdata(hdev); 218 struct tty_struct *tty = hu->tty; 219 220 BT_DBG("hdev %p tty %p", hdev, tty); 221 222 if (hu->tx_skb) { 223 kfree_skb(hu->tx_skb); hu->tx_skb = NULL; 224 } 225 226 /* Flush any pending characters in the driver and discipline. */ 227 tty_ldisc_flush(tty); 228 tty_driver_flush_buffer(tty); 229 230 if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) 231 hu->proto->flush(hu); 232 233 return 0; 234 } 235 236 /* Close device */ 237 static int hci_uart_close(struct hci_dev *hdev) 238 { 239 BT_DBG("hdev %p", hdev); 240 241 hci_uart_flush(hdev); 242 hdev->flush = NULL; 243 return 0; 244 } 245 246 /* Send frames from HCI layer */ 247 static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb) 248 { 249 struct hci_uart *hu = hci_get_drvdata(hdev); 250 251 BT_DBG("%s: type %d len %d", hdev->name, hci_skb_pkt_type(skb), 252 skb->len); 253 254 hu->proto->enqueue(hu, skb); 255 256 hci_uart_tx_wakeup(hu); 257 258 return 0; 259 } 260 261 /* Flow control or un-flow control the device */ 262 void hci_uart_set_flow_control(struct hci_uart *hu, bool enable) 263 { 264 struct tty_struct *tty = hu->tty; 265 struct ktermios ktermios; 266 int status; 267 unsigned int set = 0; 268 unsigned int clear = 0; 269 270 if (enable) { 271 /* Disable hardware flow control */ 272 ktermios = tty->termios; 273 ktermios.c_cflag &= ~CRTSCTS; 274 status = tty_set_termios(tty, &ktermios); 275 BT_DBG("Disabling hardware flow control: %s", 276 status ? "failed" : "success"); 277 278 /* Clear RTS to prevent the device from sending */ 279 /* Most UARTs need OUT2 to enable interrupts */ 280 status = tty->driver->ops->tiocmget(tty); 281 BT_DBG("Current tiocm 0x%x", status); 282 283 set &= ~(TIOCM_OUT2 | TIOCM_RTS); 284 clear = ~set; 285 set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | 286 TIOCM_OUT2 | TIOCM_LOOP; 287 clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | 288 TIOCM_OUT2 | TIOCM_LOOP; 289 status = tty->driver->ops->tiocmset(tty, set, clear); 290 BT_DBG("Clearing RTS: %s", status ? "failed" : "success"); 291 } else { 292 /* Set RTS to allow the device to send again */ 293 status = tty->driver->ops->tiocmget(tty); 294 BT_DBG("Current tiocm 0x%x", status); 295 296 set |= (TIOCM_OUT2 | TIOCM_RTS); 297 clear = ~set; 298 set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | 299 TIOCM_OUT2 | TIOCM_LOOP; 300 clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | 301 TIOCM_OUT2 | TIOCM_LOOP; 302 status = tty->driver->ops->tiocmset(tty, set, clear); 303 BT_DBG("Setting RTS: %s", status ? "failed" : "success"); 304 305 /* Re-enable hardware flow control */ 306 ktermios = tty->termios; 307 ktermios.c_cflag |= CRTSCTS; 308 status = tty_set_termios(tty, &ktermios); 309 BT_DBG("Enabling hardware flow control: %s", 310 status ? "failed" : "success"); 311 } 312 } 313 314 void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed, 315 unsigned int oper_speed) 316 { 317 hu->init_speed = init_speed; 318 hu->oper_speed = oper_speed; 319 } 320 321 void hci_uart_init_tty(struct hci_uart *hu) 322 { 323 struct tty_struct *tty = hu->tty; 324 struct ktermios ktermios; 325 326 /* Bring the UART into a known 8 bits no parity hw fc state */ 327 ktermios = tty->termios; 328 ktermios.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | 329 INLCR | IGNCR | ICRNL | IXON); 330 ktermios.c_oflag &= ~OPOST; 331 ktermios.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN); 332 ktermios.c_cflag &= ~(CSIZE | PARENB); 333 ktermios.c_cflag |= CS8; 334 ktermios.c_cflag |= CRTSCTS; 335 336 /* tty_set_termios() return not checked as it is always 0 */ 337 tty_set_termios(tty, &ktermios); 338 } 339 340 void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed) 341 { 342 struct tty_struct *tty = hu->tty; 343 struct ktermios ktermios; 344 345 ktermios = tty->termios; 346 ktermios.c_cflag &= ~CBAUD; 347 tty_termios_encode_baud_rate(&ktermios, speed, speed); 348 349 /* tty_set_termios() return not checked as it is always 0 */ 350 tty_set_termios(tty, &ktermios); 351 352 BT_DBG("%s: New tty speeds: %d/%d", hu->hdev->name, 353 tty->termios.c_ispeed, tty->termios.c_ospeed); 354 } 355 356 static int hci_uart_setup(struct hci_dev *hdev) 357 { 358 struct hci_uart *hu = hci_get_drvdata(hdev); 359 struct hci_rp_read_local_version *ver; 360 struct sk_buff *skb; 361 unsigned int speed; 362 int err; 363 364 /* Init speed if any */ 365 if (hu->init_speed) 366 speed = hu->init_speed; 367 else if (hu->proto->init_speed) 368 speed = hu->proto->init_speed; 369 else 370 speed = 0; 371 372 if (speed) 373 hci_uart_set_baudrate(hu, speed); 374 375 /* Operational speed if any */ 376 if (hu->oper_speed) 377 speed = hu->oper_speed; 378 else if (hu->proto->oper_speed) 379 speed = hu->proto->oper_speed; 380 else 381 speed = 0; 382 383 if (hu->proto->set_baudrate && speed) { 384 err = hu->proto->set_baudrate(hu, speed); 385 if (!err) 386 hci_uart_set_baudrate(hu, speed); 387 } 388 389 if (hu->proto->setup) 390 return hu->proto->setup(hu); 391 392 if (!test_bit(HCI_UART_VND_DETECT, &hu->hdev_flags)) 393 return 0; 394 395 skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL, 396 HCI_INIT_TIMEOUT); 397 if (IS_ERR(skb)) { 398 BT_ERR("%s: Reading local version information failed (%ld)", 399 hdev->name, PTR_ERR(skb)); 400 return 0; 401 } 402 403 if (skb->len != sizeof(*ver)) { 404 BT_ERR("%s: Event length mismatch for version information", 405 hdev->name); 406 goto done; 407 } 408 409 ver = (struct hci_rp_read_local_version *)skb->data; 410 411 switch (le16_to_cpu(ver->manufacturer)) { 412 #ifdef CONFIG_BT_HCIUART_INTEL 413 case 2: 414 hdev->set_bdaddr = btintel_set_bdaddr; 415 btintel_check_bdaddr(hdev); 416 break; 417 #endif 418 #ifdef CONFIG_BT_HCIUART_BCM 419 case 15: 420 hdev->set_bdaddr = btbcm_set_bdaddr; 421 btbcm_check_bdaddr(hdev); 422 break; 423 #endif 424 } 425 426 done: 427 kfree_skb(skb); 428 return 0; 429 } 430 431 /* ------ LDISC part ------ */ 432 /* hci_uart_tty_open 433 * 434 * Called when line discipline changed to HCI_UART. 435 * 436 * Arguments: 437 * tty pointer to tty info structure 438 * Return Value: 439 * 0 if success, otherwise error code 440 */ 441 static int hci_uart_tty_open(struct tty_struct *tty) 442 { 443 struct hci_uart *hu; 444 445 BT_DBG("tty %p", tty); 446 447 /* Error if the tty has no write op instead of leaving an exploitable 448 hole */ 449 if (tty->ops->write == NULL) 450 return -EOPNOTSUPP; 451 452 hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL); 453 if (!hu) { 454 BT_ERR("Can't allocate control structure"); 455 return -ENFILE; 456 } 457 458 tty->disc_data = hu; 459 hu->tty = tty; 460 tty->receive_room = 65536; 461 462 INIT_WORK(&hu->init_ready, hci_uart_init_work); 463 INIT_WORK(&hu->write_work, hci_uart_write_work); 464 465 /* Flush any pending characters in the driver */ 466 tty_driver_flush_buffer(tty); 467 468 return 0; 469 } 470 471 /* hci_uart_tty_close() 472 * 473 * Called when the line discipline is changed to something 474 * else, the tty is closed, or the tty detects a hangup. 475 */ 476 static void hci_uart_tty_close(struct tty_struct *tty) 477 { 478 struct hci_uart *hu = tty->disc_data; 479 struct hci_dev *hdev; 480 481 BT_DBG("tty %p", tty); 482 483 /* Detach from the tty */ 484 tty->disc_data = NULL; 485 486 if (!hu) 487 return; 488 489 hdev = hu->hdev; 490 if (hdev) 491 hci_uart_close(hdev); 492 493 cancel_work_sync(&hu->write_work); 494 495 if (test_and_clear_bit(HCI_UART_PROTO_READY, &hu->flags)) { 496 if (hdev) { 497 if (test_bit(HCI_UART_REGISTERED, &hu->flags)) 498 hci_unregister_dev(hdev); 499 hci_free_dev(hdev); 500 } 501 hu->proto->close(hu); 502 } 503 clear_bit(HCI_UART_PROTO_SET, &hu->flags); 504 505 kfree(hu); 506 } 507 508 /* hci_uart_tty_wakeup() 509 * 510 * Callback for transmit wakeup. Called when low level 511 * device driver can accept more send data. 512 * 513 * Arguments: tty pointer to associated tty instance data 514 * Return Value: None 515 */ 516 static void hci_uart_tty_wakeup(struct tty_struct *tty) 517 { 518 struct hci_uart *hu = tty->disc_data; 519 520 BT_DBG(""); 521 522 if (!hu) 523 return; 524 525 clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); 526 527 if (tty != hu->tty) 528 return; 529 530 if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) 531 hci_uart_tx_wakeup(hu); 532 } 533 534 /* hci_uart_tty_receive() 535 * 536 * Called by tty low level driver when receive data is 537 * available. 538 * 539 * Arguments: tty pointer to tty isntance data 540 * data pointer to received data 541 * flags pointer to flags for data 542 * count count of received data in bytes 543 * 544 * Return Value: None 545 */ 546 static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data, 547 char *flags, int count) 548 { 549 struct hci_uart *hu = tty->disc_data; 550 551 if (!hu || tty != hu->tty) 552 return; 553 554 if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) 555 return; 556 557 /* It does not need a lock here as it is already protected by a mutex in 558 * tty caller 559 */ 560 hu->proto->recv(hu, data, count); 561 562 if (hu->hdev) 563 hu->hdev->stat.byte_rx += count; 564 565 tty_unthrottle(tty); 566 } 567 568 static int hci_uart_register_dev(struct hci_uart *hu) 569 { 570 struct hci_dev *hdev; 571 572 BT_DBG(""); 573 574 /* Initialize and register HCI device */ 575 hdev = hci_alloc_dev(); 576 if (!hdev) { 577 BT_ERR("Can't allocate HCI device"); 578 return -ENOMEM; 579 } 580 581 hu->hdev = hdev; 582 583 hdev->bus = HCI_UART; 584 hci_set_drvdata(hdev, hu); 585 586 /* Only when vendor specific setup callback is provided, consider 587 * the manufacturer information valid. This avoids filling in the 588 * value for Ericsson when nothing is specified. 589 */ 590 if (hu->proto->setup) 591 hdev->manufacturer = hu->proto->manufacturer; 592 593 hdev->open = hci_uart_open; 594 hdev->close = hci_uart_close; 595 hdev->flush = hci_uart_flush; 596 hdev->send = hci_uart_send_frame; 597 hdev->setup = hci_uart_setup; 598 SET_HCIDEV_DEV(hdev, hu->tty->dev); 599 600 if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags)) 601 set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks); 602 603 if (test_bit(HCI_UART_EXT_CONFIG, &hu->hdev_flags)) 604 set_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks); 605 606 if (!test_bit(HCI_UART_RESET_ON_INIT, &hu->hdev_flags)) 607 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks); 608 609 if (test_bit(HCI_UART_CREATE_AMP, &hu->hdev_flags)) 610 hdev->dev_type = HCI_AMP; 611 else 612 hdev->dev_type = HCI_PRIMARY; 613 614 if (test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) 615 return 0; 616 617 if (hci_register_dev(hdev) < 0) { 618 BT_ERR("Can't register HCI device"); 619 hci_free_dev(hdev); 620 return -ENODEV; 621 } 622 623 set_bit(HCI_UART_REGISTERED, &hu->flags); 624 625 return 0; 626 } 627 628 static int hci_uart_set_proto(struct hci_uart *hu, int id) 629 { 630 const struct hci_uart_proto *p; 631 int err; 632 633 p = hci_uart_get_proto(id); 634 if (!p) 635 return -EPROTONOSUPPORT; 636 637 err = p->open(hu); 638 if (err) 639 return err; 640 641 hu->proto = p; 642 set_bit(HCI_UART_PROTO_READY, &hu->flags); 643 644 err = hci_uart_register_dev(hu); 645 if (err) { 646 clear_bit(HCI_UART_PROTO_READY, &hu->flags); 647 p->close(hu); 648 return err; 649 } 650 651 return 0; 652 } 653 654 static int hci_uart_set_flags(struct hci_uart *hu, unsigned long flags) 655 { 656 unsigned long valid_flags = BIT(HCI_UART_RAW_DEVICE) | 657 BIT(HCI_UART_RESET_ON_INIT) | 658 BIT(HCI_UART_CREATE_AMP) | 659 BIT(HCI_UART_INIT_PENDING) | 660 BIT(HCI_UART_EXT_CONFIG) | 661 BIT(HCI_UART_VND_DETECT); 662 663 if (flags & ~valid_flags) 664 return -EINVAL; 665 666 hu->hdev_flags = flags; 667 668 return 0; 669 } 670 671 /* hci_uart_tty_ioctl() 672 * 673 * Process IOCTL system call for the tty device. 674 * 675 * Arguments: 676 * 677 * tty pointer to tty instance data 678 * file pointer to open file object for device 679 * cmd IOCTL command code 680 * arg argument for IOCTL call (cmd dependent) 681 * 682 * Return Value: Command dependent 683 */ 684 static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file *file, 685 unsigned int cmd, unsigned long arg) 686 { 687 struct hci_uart *hu = tty->disc_data; 688 int err = 0; 689 690 BT_DBG(""); 691 692 /* Verify the status of the device */ 693 if (!hu) 694 return -EBADF; 695 696 switch (cmd) { 697 case HCIUARTSETPROTO: 698 if (!test_and_set_bit(HCI_UART_PROTO_SET, &hu->flags)) { 699 err = hci_uart_set_proto(hu, arg); 700 if (err) 701 clear_bit(HCI_UART_PROTO_SET, &hu->flags); 702 } else 703 err = -EBUSY; 704 break; 705 706 case HCIUARTGETPROTO: 707 if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) 708 err = hu->proto->id; 709 else 710 err = -EUNATCH; 711 break; 712 713 case HCIUARTGETDEVICE: 714 if (test_bit(HCI_UART_REGISTERED, &hu->flags)) 715 err = hu->hdev->id; 716 else 717 err = -EUNATCH; 718 break; 719 720 case HCIUARTSETFLAGS: 721 if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) 722 err = -EBUSY; 723 else 724 err = hci_uart_set_flags(hu, arg); 725 break; 726 727 case HCIUARTGETFLAGS: 728 err = hu->hdev_flags; 729 break; 730 731 default: 732 err = n_tty_ioctl_helper(tty, file, cmd, arg); 733 break; 734 } 735 736 return err; 737 } 738 739 /* 740 * We don't provide read/write/poll interface for user space. 741 */ 742 static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file, 743 unsigned char __user *buf, size_t nr) 744 { 745 return 0; 746 } 747 748 static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file, 749 const unsigned char *data, size_t count) 750 { 751 return 0; 752 } 753 754 static unsigned int hci_uart_tty_poll(struct tty_struct *tty, 755 struct file *filp, poll_table *wait) 756 { 757 return 0; 758 } 759 760 static int __init hci_uart_init(void) 761 { 762 static struct tty_ldisc_ops hci_uart_ldisc; 763 int err; 764 765 BT_INFO("HCI UART driver ver %s", VERSION); 766 767 /* Register the tty discipline */ 768 769 memset(&hci_uart_ldisc, 0, sizeof(hci_uart_ldisc)); 770 hci_uart_ldisc.magic = TTY_LDISC_MAGIC; 771 hci_uart_ldisc.name = "n_hci"; 772 hci_uart_ldisc.open = hci_uart_tty_open; 773 hci_uart_ldisc.close = hci_uart_tty_close; 774 hci_uart_ldisc.read = hci_uart_tty_read; 775 hci_uart_ldisc.write = hci_uart_tty_write; 776 hci_uart_ldisc.ioctl = hci_uart_tty_ioctl; 777 hci_uart_ldisc.poll = hci_uart_tty_poll; 778 hci_uart_ldisc.receive_buf = hci_uart_tty_receive; 779 hci_uart_ldisc.write_wakeup = hci_uart_tty_wakeup; 780 hci_uart_ldisc.owner = THIS_MODULE; 781 782 err = tty_register_ldisc(N_HCI, &hci_uart_ldisc); 783 if (err) { 784 BT_ERR("HCI line discipline registration failed. (%d)", err); 785 return err; 786 } 787 788 #ifdef CONFIG_BT_HCIUART_H4 789 h4_init(); 790 #endif 791 #ifdef CONFIG_BT_HCIUART_BCSP 792 bcsp_init(); 793 #endif 794 #ifdef CONFIG_BT_HCIUART_LL 795 ll_init(); 796 #endif 797 #ifdef CONFIG_BT_HCIUART_ATH3K 798 ath_init(); 799 #endif 800 #ifdef CONFIG_BT_HCIUART_3WIRE 801 h5_init(); 802 #endif 803 #ifdef CONFIG_BT_HCIUART_INTEL 804 intel_init(); 805 #endif 806 #ifdef CONFIG_BT_HCIUART_BCM 807 bcm_init(); 808 #endif 809 #ifdef CONFIG_BT_HCIUART_QCA 810 qca_init(); 811 #endif 812 #ifdef CONFIG_BT_HCIUART_AG6XX 813 ag6xx_init(); 814 #endif 815 #ifdef CONFIG_BT_HCIUART_MRVL 816 mrvl_init(); 817 #endif 818 819 return 0; 820 } 821 822 static void __exit hci_uart_exit(void) 823 { 824 int err; 825 826 #ifdef CONFIG_BT_HCIUART_H4 827 h4_deinit(); 828 #endif 829 #ifdef CONFIG_BT_HCIUART_BCSP 830 bcsp_deinit(); 831 #endif 832 #ifdef CONFIG_BT_HCIUART_LL 833 ll_deinit(); 834 #endif 835 #ifdef CONFIG_BT_HCIUART_ATH3K 836 ath_deinit(); 837 #endif 838 #ifdef CONFIG_BT_HCIUART_3WIRE 839 h5_deinit(); 840 #endif 841 #ifdef CONFIG_BT_HCIUART_INTEL 842 intel_deinit(); 843 #endif 844 #ifdef CONFIG_BT_HCIUART_BCM 845 bcm_deinit(); 846 #endif 847 #ifdef CONFIG_BT_HCIUART_QCA 848 qca_deinit(); 849 #endif 850 #ifdef CONFIG_BT_HCIUART_AG6XX 851 ag6xx_deinit(); 852 #endif 853 #ifdef CONFIG_BT_HCIUART_MRVL 854 mrvl_deinit(); 855 #endif 856 857 /* Release tty registration of line discipline */ 858 err = tty_unregister_ldisc(N_HCI); 859 if (err) 860 BT_ERR("Can't unregister HCI line discipline (%d)", err); 861 } 862 863 module_init(hci_uart_init); 864 module_exit(hci_uart_exit); 865 866 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 867 MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION); 868 MODULE_VERSION(VERSION); 869 MODULE_LICENSE("GPL"); 870 MODULE_ALIAS_LDISC(N_HCI); 871