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, bt_cb(skb)->pkt_type); 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_SET, &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, bt_cb(skb)->pkt_type, skb->len); 252 253 hu->proto->enqueue(hu, skb); 254 255 hci_uart_tx_wakeup(hu); 256 257 return 0; 258 } 259 260 /* Flow control or un-flow control the device */ 261 void hci_uart_set_flow_control(struct hci_uart *hu, bool enable) 262 { 263 struct tty_struct *tty = hu->tty; 264 struct ktermios ktermios; 265 int status; 266 unsigned int set = 0; 267 unsigned int clear = 0; 268 269 if (enable) { 270 /* Disable hardware flow control */ 271 ktermios = tty->termios; 272 ktermios.c_cflag &= ~CRTSCTS; 273 status = tty_set_termios(tty, &ktermios); 274 BT_DBG("Disabling hardware flow control: %s", 275 status ? "failed" : "success"); 276 277 /* Clear RTS to prevent the device from sending */ 278 /* Most UARTs need OUT2 to enable interrupts */ 279 status = tty->driver->ops->tiocmget(tty); 280 BT_DBG("Current tiocm 0x%x", status); 281 282 set &= ~(TIOCM_OUT2 | TIOCM_RTS); 283 clear = ~set; 284 set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | 285 TIOCM_OUT2 | TIOCM_LOOP; 286 clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | 287 TIOCM_OUT2 | TIOCM_LOOP; 288 status = tty->driver->ops->tiocmset(tty, set, clear); 289 BT_DBG("Clearing RTS: %s", status ? "failed" : "success"); 290 } else { 291 /* Set RTS to allow the device to send again */ 292 status = tty->driver->ops->tiocmget(tty); 293 BT_DBG("Current tiocm 0x%x", status); 294 295 set |= (TIOCM_OUT2 | TIOCM_RTS); 296 clear = ~set; 297 set &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | 298 TIOCM_OUT2 | TIOCM_LOOP; 299 clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_OUT1 | 300 TIOCM_OUT2 | TIOCM_LOOP; 301 status = tty->driver->ops->tiocmset(tty, set, clear); 302 BT_DBG("Setting RTS: %s", status ? "failed" : "success"); 303 304 /* Re-enable hardware flow control */ 305 ktermios = tty->termios; 306 ktermios.c_cflag |= CRTSCTS; 307 status = tty_set_termios(tty, &ktermios); 308 BT_DBG("Enabling hardware flow control: %s", 309 status ? "failed" : "success"); 310 } 311 } 312 313 void hci_uart_set_speeds(struct hci_uart *hu, unsigned int init_speed, 314 unsigned int oper_speed) 315 { 316 hu->init_speed = init_speed; 317 hu->oper_speed = oper_speed; 318 } 319 320 void hci_uart_init_tty(struct hci_uart *hu) 321 { 322 struct tty_struct *tty = hu->tty; 323 struct ktermios ktermios; 324 325 /* Bring the UART into a known 8 bits no parity hw fc state */ 326 ktermios = tty->termios; 327 ktermios.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | 328 INLCR | IGNCR | ICRNL | IXON); 329 ktermios.c_oflag &= ~OPOST; 330 ktermios.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN); 331 ktermios.c_cflag &= ~(CSIZE | PARENB); 332 ktermios.c_cflag |= CS8; 333 ktermios.c_cflag |= CRTSCTS; 334 335 /* tty_set_termios() return not checked as it is always 0 */ 336 tty_set_termios(tty, &ktermios); 337 } 338 339 void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed) 340 { 341 struct tty_struct *tty = hu->tty; 342 struct ktermios ktermios; 343 344 ktermios = tty->termios; 345 ktermios.c_cflag &= ~CBAUD; 346 tty_termios_encode_baud_rate(&ktermios, speed, speed); 347 348 /* tty_set_termios() return not checked as it is always 0 */ 349 tty_set_termios(tty, &ktermios); 350 351 BT_DBG("%s: New tty speeds: %d/%d", hu->hdev->name, 352 tty->termios.c_ispeed, tty->termios.c_ospeed); 353 } 354 355 static int hci_uart_setup(struct hci_dev *hdev) 356 { 357 struct hci_uart *hu = hci_get_drvdata(hdev); 358 struct hci_rp_read_local_version *ver; 359 struct sk_buff *skb; 360 unsigned int speed; 361 int err; 362 363 /* Init speed if any */ 364 if (hu->init_speed) 365 speed = hu->init_speed; 366 else if (hu->proto->init_speed) 367 speed = hu->proto->init_speed; 368 else 369 speed = 0; 370 371 if (speed) 372 hci_uart_set_baudrate(hu, speed); 373 374 /* Operational speed if any */ 375 if (hu->oper_speed) 376 speed = hu->oper_speed; 377 else if (hu->proto->oper_speed) 378 speed = hu->proto->oper_speed; 379 else 380 speed = 0; 381 382 if (hu->proto->set_baudrate && speed) { 383 err = hu->proto->set_baudrate(hu, speed); 384 if (!err) 385 hci_uart_set_baudrate(hu, speed); 386 } 387 388 if (hu->proto->setup) 389 return hu->proto->setup(hu); 390 391 if (!test_bit(HCI_UART_VND_DETECT, &hu->hdev_flags)) 392 return 0; 393 394 skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL, 395 HCI_INIT_TIMEOUT); 396 if (IS_ERR(skb)) { 397 BT_ERR("%s: Reading local version information failed (%ld)", 398 hdev->name, PTR_ERR(skb)); 399 return 0; 400 } 401 402 if (skb->len != sizeof(*ver)) { 403 BT_ERR("%s: Event length mismatch for version information", 404 hdev->name); 405 goto done; 406 } 407 408 ver = (struct hci_rp_read_local_version *)skb->data; 409 410 switch (le16_to_cpu(ver->manufacturer)) { 411 #ifdef CONFIG_BT_HCIUART_INTEL 412 case 2: 413 hdev->set_bdaddr = btintel_set_bdaddr; 414 btintel_check_bdaddr(hdev); 415 break; 416 #endif 417 #ifdef CONFIG_BT_HCIUART_BCM 418 case 15: 419 hdev->set_bdaddr = btbcm_set_bdaddr; 420 btbcm_check_bdaddr(hdev); 421 break; 422 #endif 423 } 424 425 done: 426 kfree_skb(skb); 427 return 0; 428 } 429 430 /* ------ LDISC part ------ */ 431 /* hci_uart_tty_open 432 * 433 * Called when line discipline changed to HCI_UART. 434 * 435 * Arguments: 436 * tty pointer to tty info structure 437 * Return Value: 438 * 0 if success, otherwise error code 439 */ 440 static int hci_uart_tty_open(struct tty_struct *tty) 441 { 442 struct hci_uart *hu; 443 444 BT_DBG("tty %p", tty); 445 446 /* Error if the tty has no write op instead of leaving an exploitable 447 hole */ 448 if (tty->ops->write == NULL) 449 return -EOPNOTSUPP; 450 451 hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL); 452 if (!hu) { 453 BT_ERR("Can't allocate control structure"); 454 return -ENFILE; 455 } 456 457 tty->disc_data = hu; 458 hu->tty = tty; 459 tty->receive_room = 65536; 460 461 INIT_WORK(&hu->init_ready, hci_uart_init_work); 462 INIT_WORK(&hu->write_work, hci_uart_write_work); 463 464 /* Flush any pending characters in the driver and line discipline. */ 465 466 /* FIXME: why is this needed. Note don't use ldisc_ref here as the 467 open path is before the ldisc is referencable */ 468 469 if (tty->ldisc->ops->flush_buffer) 470 tty->ldisc->ops->flush_buffer(tty); 471 tty_driver_flush_buffer(tty); 472 473 return 0; 474 } 475 476 /* hci_uart_tty_close() 477 * 478 * Called when the line discipline is changed to something 479 * else, the tty is closed, or the tty detects a hangup. 480 */ 481 static void hci_uart_tty_close(struct tty_struct *tty) 482 { 483 struct hci_uart *hu = tty->disc_data; 484 struct hci_dev *hdev; 485 486 BT_DBG("tty %p", tty); 487 488 /* Detach from the tty */ 489 tty->disc_data = NULL; 490 491 if (!hu) 492 return; 493 494 hdev = hu->hdev; 495 if (hdev) 496 hci_uart_close(hdev); 497 498 cancel_work_sync(&hu->write_work); 499 500 if (test_and_clear_bit(HCI_UART_PROTO_SET, &hu->flags)) { 501 if (hdev) { 502 if (test_bit(HCI_UART_REGISTERED, &hu->flags)) 503 hci_unregister_dev(hdev); 504 hci_free_dev(hdev); 505 } 506 hu->proto->close(hu); 507 } 508 509 kfree(hu); 510 } 511 512 /* hci_uart_tty_wakeup() 513 * 514 * Callback for transmit wakeup. Called when low level 515 * device driver can accept more send data. 516 * 517 * Arguments: tty pointer to associated tty instance data 518 * Return Value: None 519 */ 520 static void hci_uart_tty_wakeup(struct tty_struct *tty) 521 { 522 struct hci_uart *hu = tty->disc_data; 523 524 BT_DBG(""); 525 526 if (!hu) 527 return; 528 529 clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); 530 531 if (tty != hu->tty) 532 return; 533 534 if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) 535 hci_uart_tx_wakeup(hu); 536 } 537 538 /* hci_uart_tty_receive() 539 * 540 * Called by tty low level driver when receive data is 541 * available. 542 * 543 * Arguments: tty pointer to tty isntance data 544 * data pointer to received data 545 * flags pointer to flags for data 546 * count count of received data in bytes 547 * 548 * Return Value: None 549 */ 550 static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data, 551 char *flags, int count) 552 { 553 struct hci_uart *hu = tty->disc_data; 554 555 if (!hu || tty != hu->tty) 556 return; 557 558 if (!test_bit(HCI_UART_PROTO_SET, &hu->flags)) 559 return; 560 561 /* It does not need a lock here as it is already protected by a mutex in 562 * tty caller 563 */ 564 hu->proto->recv(hu, data, count); 565 566 if (hu->hdev) 567 hu->hdev->stat.byte_rx += count; 568 569 tty_unthrottle(tty); 570 } 571 572 static int hci_uart_register_dev(struct hci_uart *hu) 573 { 574 struct hci_dev *hdev; 575 576 BT_DBG(""); 577 578 /* Initialize and register HCI device */ 579 hdev = hci_alloc_dev(); 580 if (!hdev) { 581 BT_ERR("Can't allocate HCI device"); 582 return -ENOMEM; 583 } 584 585 hu->hdev = hdev; 586 587 hdev->bus = HCI_UART; 588 hci_set_drvdata(hdev, hu); 589 590 /* Only when vendor specific setup callback is provided, consider 591 * the manufacturer information valid. This avoids filling in the 592 * value for Ericsson when nothing is specified. 593 */ 594 if (hu->proto->setup) 595 hdev->manufacturer = hu->proto->manufacturer; 596 597 hdev->open = hci_uart_open; 598 hdev->close = hci_uart_close; 599 hdev->flush = hci_uart_flush; 600 hdev->send = hci_uart_send_frame; 601 hdev->setup = hci_uart_setup; 602 SET_HCIDEV_DEV(hdev, hu->tty->dev); 603 604 if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags)) 605 set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks); 606 607 if (test_bit(HCI_UART_EXT_CONFIG, &hu->hdev_flags)) 608 set_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks); 609 610 if (!test_bit(HCI_UART_RESET_ON_INIT, &hu->hdev_flags)) 611 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks); 612 613 if (test_bit(HCI_UART_CREATE_AMP, &hu->hdev_flags)) 614 hdev->dev_type = HCI_AMP; 615 else 616 hdev->dev_type = HCI_BREDR; 617 618 if (test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) 619 return 0; 620 621 if (hci_register_dev(hdev) < 0) { 622 BT_ERR("Can't register HCI device"); 623 hci_free_dev(hdev); 624 return -ENODEV; 625 } 626 627 set_bit(HCI_UART_REGISTERED, &hu->flags); 628 629 return 0; 630 } 631 632 static int hci_uart_set_proto(struct hci_uart *hu, int id) 633 { 634 const struct hci_uart_proto *p; 635 int err; 636 637 p = hci_uart_get_proto(id); 638 if (!p) 639 return -EPROTONOSUPPORT; 640 641 err = p->open(hu); 642 if (err) 643 return err; 644 645 hu->proto = p; 646 647 err = hci_uart_register_dev(hu); 648 if (err) { 649 p->close(hu); 650 return err; 651 } 652 653 return 0; 654 } 655 656 static int hci_uart_set_flags(struct hci_uart *hu, unsigned long flags) 657 { 658 unsigned long valid_flags = BIT(HCI_UART_RAW_DEVICE) | 659 BIT(HCI_UART_RESET_ON_INIT) | 660 BIT(HCI_UART_CREATE_AMP) | 661 BIT(HCI_UART_INIT_PENDING) | 662 BIT(HCI_UART_EXT_CONFIG) | 663 BIT(HCI_UART_VND_DETECT); 664 665 if (flags & ~valid_flags) 666 return -EINVAL; 667 668 hu->hdev_flags = flags; 669 670 return 0; 671 } 672 673 /* hci_uart_tty_ioctl() 674 * 675 * Process IOCTL system call for the tty device. 676 * 677 * Arguments: 678 * 679 * tty pointer to tty instance data 680 * file pointer to open file object for device 681 * cmd IOCTL command code 682 * arg argument for IOCTL call (cmd dependent) 683 * 684 * Return Value: Command dependent 685 */ 686 static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file *file, 687 unsigned int cmd, unsigned long arg) 688 { 689 struct hci_uart *hu = tty->disc_data; 690 int err = 0; 691 692 BT_DBG(""); 693 694 /* Verify the status of the device */ 695 if (!hu) 696 return -EBADF; 697 698 switch (cmd) { 699 case HCIUARTSETPROTO: 700 if (!test_and_set_bit(HCI_UART_PROTO_SET, &hu->flags)) { 701 err = hci_uart_set_proto(hu, arg); 702 if (err) { 703 clear_bit(HCI_UART_PROTO_SET, &hu->flags); 704 return err; 705 } 706 } else 707 return -EBUSY; 708 break; 709 710 case HCIUARTGETPROTO: 711 if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) 712 return hu->proto->id; 713 return -EUNATCH; 714 715 case HCIUARTGETDEVICE: 716 if (test_bit(HCI_UART_REGISTERED, &hu->flags)) 717 return hu->hdev->id; 718 return -EUNATCH; 719 720 case HCIUARTSETFLAGS: 721 if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) 722 return -EBUSY; 723 err = hci_uart_set_flags(hu, arg); 724 if (err) 725 return err; 726 break; 727 728 case HCIUARTGETFLAGS: 729 return hu->hdev_flags; 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 812 813 return 0; 814 } 815 816 static void __exit hci_uart_exit(void) 817 { 818 int err; 819 820 #ifdef CONFIG_BT_HCIUART_H4 821 h4_deinit(); 822 #endif 823 #ifdef CONFIG_BT_HCIUART_BCSP 824 bcsp_deinit(); 825 #endif 826 #ifdef CONFIG_BT_HCIUART_LL 827 ll_deinit(); 828 #endif 829 #ifdef CONFIG_BT_HCIUART_ATH3K 830 ath_deinit(); 831 #endif 832 #ifdef CONFIG_BT_HCIUART_3WIRE 833 h5_deinit(); 834 #endif 835 #ifdef CONFIG_BT_HCIUART_INTEL 836 intel_deinit(); 837 #endif 838 #ifdef CONFIG_BT_HCIUART_BCM 839 bcm_deinit(); 840 #endif 841 #ifdef CONFIG_BT_HCIUART_QCA 842 qca_deinit(); 843 #endif 844 845 /* Release tty registration of line discipline */ 846 err = tty_unregister_ldisc(N_HCI); 847 if (err) 848 BT_ERR("Can't unregister HCI line discipline (%d)", err); 849 } 850 851 module_init(hci_uart_init); 852 module_exit(hci_uart_exit); 853 854 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 855 MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION); 856 MODULE_VERSION(VERSION); 857 MODULE_LICENSE("GPL"); 858 MODULE_ALIAS_LDISC(N_HCI); 859