| 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 | |
| 44 | #include <net/bluetooth/bluetooth.h> |
| 45 | #include <net/bluetooth/hci_core.h> |
| 46 | |
| 47 | #include "hci_uart.h" |
| 48 | |
| 49 | #define VERSION "2.2" |
| 50 | |
| 51 | static struct hci_uart_proto *hup[HCI_UART_MAX_PROTO]; |
| 52 | |
| 53 | int hci_uart_register_proto(struct hci_uart_proto *p) |
| 54 | { |
| 55 | if (p->id >= HCI_UART_MAX_PROTO) |
| 56 | return -EINVAL; |
| 57 | |
| 58 | if (hup[p->id]) |
| 59 | return -EEXIST; |
| 60 | |
| 61 | hup[p->id] = p; |
| 62 | |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | int hci_uart_unregister_proto(struct hci_uart_proto *p) |
| 67 | { |
| 68 | if (p->id >= HCI_UART_MAX_PROTO) |
| 69 | return -EINVAL; |
| 70 | |
| 71 | if (!hup[p->id]) |
| 72 | return -EINVAL; |
| 73 | |
| 74 | hup[p->id] = NULL; |
| 75 | |
| 76 | return 0; |
| 77 | } |
| 78 | |
| 79 | static struct hci_uart_proto *hci_uart_get_proto(unsigned int id) |
| 80 | { |
| 81 | if (id >= HCI_UART_MAX_PROTO) |
| 82 | return NULL; |
| 83 | |
| 84 | return hup[id]; |
| 85 | } |
| 86 | |
| 87 | static inline void hci_uart_tx_complete(struct hci_uart *hu, int pkt_type) |
| 88 | { |
| 89 | struct hci_dev *hdev = hu->hdev; |
| 90 | |
| 91 | /* Update HCI stat counters */ |
| 92 | switch (pkt_type) { |
| 93 | case HCI_COMMAND_PKT: |
| 94 | hdev->stat.cmd_tx++; |
| 95 | break; |
| 96 | |
| 97 | case HCI_ACLDATA_PKT: |
| 98 | hdev->stat.acl_tx++; |
| 99 | break; |
| 100 | |
| 101 | case HCI_SCODATA_PKT: |
| 102 | hdev->stat.sco_tx++; |
| 103 | break; |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | static inline struct sk_buff *hci_uart_dequeue(struct hci_uart *hu) |
| 108 | { |
| 109 | struct sk_buff *skb = hu->tx_skb; |
| 110 | |
| 111 | if (!skb) |
| 112 | skb = hu->proto->dequeue(hu); |
| 113 | else |
| 114 | hu->tx_skb = NULL; |
| 115 | |
| 116 | return skb; |
| 117 | } |
| 118 | |
| 119 | int hci_uart_tx_wakeup(struct hci_uart *hu) |
| 120 | { |
| 121 | if (test_and_set_bit(HCI_UART_SENDING, &hu->tx_state)) { |
| 122 | set_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); |
| 123 | return 0; |
| 124 | } |
| 125 | |
| 126 | BT_DBG(""); |
| 127 | |
| 128 | schedule_work(&hu->write_work); |
| 129 | |
| 130 | return 0; |
| 131 | } |
| 132 | |
| 133 | static void hci_uart_write_work(struct work_struct *work) |
| 134 | { |
| 135 | struct hci_uart *hu = container_of(work, struct hci_uart, write_work); |
| 136 | struct tty_struct *tty = hu->tty; |
| 137 | struct hci_dev *hdev = hu->hdev; |
| 138 | struct sk_buff *skb; |
| 139 | |
| 140 | /* REVISIT: should we cope with bad skbs or ->write() returning |
| 141 | * and error value ? |
| 142 | */ |
| 143 | |
| 144 | restart: |
| 145 | clear_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); |
| 146 | |
| 147 | while ((skb = hci_uart_dequeue(hu))) { |
| 148 | int len; |
| 149 | |
| 150 | set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); |
| 151 | len = tty->ops->write(tty, skb->data, skb->len); |
| 152 | hdev->stat.byte_tx += len; |
| 153 | |
| 154 | skb_pull(skb, len); |
| 155 | if (skb->len) { |
| 156 | hu->tx_skb = skb; |
| 157 | break; |
| 158 | } |
| 159 | |
| 160 | hci_uart_tx_complete(hu, bt_cb(skb)->pkt_type); |
| 161 | kfree_skb(skb); |
| 162 | } |
| 163 | |
| 164 | if (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state)) |
| 165 | goto restart; |
| 166 | |
| 167 | clear_bit(HCI_UART_SENDING, &hu->tx_state); |
| 168 | } |
| 169 | |
| 170 | static void hci_uart_init_work(struct work_struct *work) |
| 171 | { |
| 172 | struct hci_uart *hu = container_of(work, struct hci_uart, init_ready); |
| 173 | int err; |
| 174 | |
| 175 | if (!test_and_clear_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) |
| 176 | return; |
| 177 | |
| 178 | err = hci_register_dev(hu->hdev); |
| 179 | if (err < 0) { |
| 180 | BT_ERR("Can't register HCI device"); |
| 181 | hci_free_dev(hu->hdev); |
| 182 | hu->hdev = NULL; |
| 183 | hu->proto->close(hu); |
| 184 | } |
| 185 | |
| 186 | set_bit(HCI_UART_REGISTERED, &hu->flags); |
| 187 | } |
| 188 | |
| 189 | int hci_uart_init_ready(struct hci_uart *hu) |
| 190 | { |
| 191 | if (!test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) |
| 192 | return -EALREADY; |
| 193 | |
| 194 | schedule_work(&hu->init_ready); |
| 195 | |
| 196 | return 0; |
| 197 | } |
| 198 | |
| 199 | /* ------- Interface to HCI layer ------ */ |
| 200 | /* Initialize device */ |
| 201 | static int hci_uart_open(struct hci_dev *hdev) |
| 202 | { |
| 203 | BT_DBG("%s %p", hdev->name, hdev); |
| 204 | |
| 205 | /* Nothing to do for UART driver */ |
| 206 | |
| 207 | set_bit(HCI_RUNNING, &hdev->flags); |
| 208 | |
| 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | /* Reset device */ |
| 213 | static int hci_uart_flush(struct hci_dev *hdev) |
| 214 | { |
| 215 | struct hci_uart *hu = hci_get_drvdata(hdev); |
| 216 | struct tty_struct *tty = hu->tty; |
| 217 | |
| 218 | BT_DBG("hdev %p tty %p", hdev, tty); |
| 219 | |
| 220 | if (hu->tx_skb) { |
| 221 | kfree_skb(hu->tx_skb); hu->tx_skb = NULL; |
| 222 | } |
| 223 | |
| 224 | /* Flush any pending characters in the driver and discipline. */ |
| 225 | tty_ldisc_flush(tty); |
| 226 | tty_driver_flush_buffer(tty); |
| 227 | |
| 228 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) |
| 229 | hu->proto->flush(hu); |
| 230 | |
| 231 | return 0; |
| 232 | } |
| 233 | |
| 234 | /* Close device */ |
| 235 | static int hci_uart_close(struct hci_dev *hdev) |
| 236 | { |
| 237 | BT_DBG("hdev %p", hdev); |
| 238 | |
| 239 | if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags)) |
| 240 | return 0; |
| 241 | |
| 242 | hci_uart_flush(hdev); |
| 243 | hdev->flush = NULL; |
| 244 | return 0; |
| 245 | } |
| 246 | |
| 247 | /* Send frames from HCI layer */ |
| 248 | static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb) |
| 249 | { |
| 250 | struct hci_uart *hu = hci_get_drvdata(hdev); |
| 251 | |
| 252 | if (!test_bit(HCI_RUNNING, &hdev->flags)) |
| 253 | return -EBUSY; |
| 254 | |
| 255 | BT_DBG("%s: type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
| 256 | |
| 257 | hu->proto->enqueue(hu, skb); |
| 258 | |
| 259 | hci_uart_tx_wakeup(hu); |
| 260 | |
| 261 | return 0; |
| 262 | } |
| 263 | |
| 264 | static int hci_uart_setup(struct hci_dev *hdev) |
| 265 | { |
| 266 | struct hci_uart *hu = hci_get_drvdata(hdev); |
| 267 | |
| 268 | if (hu->proto->setup) |
| 269 | return hu->proto->setup(hu); |
| 270 | |
| 271 | return 0; |
| 272 | } |
| 273 | |
| 274 | /* ------ LDISC part ------ */ |
| 275 | /* hci_uart_tty_open |
| 276 | * |
| 277 | * Called when line discipline changed to HCI_UART. |
| 278 | * |
| 279 | * Arguments: |
| 280 | * tty pointer to tty info structure |
| 281 | * Return Value: |
| 282 | * 0 if success, otherwise error code |
| 283 | */ |
| 284 | static int hci_uart_tty_open(struct tty_struct *tty) |
| 285 | { |
| 286 | struct hci_uart *hu; |
| 287 | |
| 288 | BT_DBG("tty %p", tty); |
| 289 | |
| 290 | /* Error if the tty has no write op instead of leaving an exploitable |
| 291 | hole */ |
| 292 | if (tty->ops->write == NULL) |
| 293 | return -EOPNOTSUPP; |
| 294 | |
| 295 | hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL); |
| 296 | if (!hu) { |
| 297 | BT_ERR("Can't allocate control structure"); |
| 298 | return -ENFILE; |
| 299 | } |
| 300 | |
| 301 | tty->disc_data = hu; |
| 302 | hu->tty = tty; |
| 303 | tty->receive_room = 65536; |
| 304 | |
| 305 | INIT_WORK(&hu->init_ready, hci_uart_init_work); |
| 306 | INIT_WORK(&hu->write_work, hci_uart_write_work); |
| 307 | |
| 308 | spin_lock_init(&hu->rx_lock); |
| 309 | |
| 310 | /* Flush any pending characters in the driver and line discipline. */ |
| 311 | |
| 312 | /* FIXME: why is this needed. Note don't use ldisc_ref here as the |
| 313 | open path is before the ldisc is referencable */ |
| 314 | |
| 315 | if (tty->ldisc->ops->flush_buffer) |
| 316 | tty->ldisc->ops->flush_buffer(tty); |
| 317 | tty_driver_flush_buffer(tty); |
| 318 | |
| 319 | return 0; |
| 320 | } |
| 321 | |
| 322 | /* hci_uart_tty_close() |
| 323 | * |
| 324 | * Called when the line discipline is changed to something |
| 325 | * else, the tty is closed, or the tty detects a hangup. |
| 326 | */ |
| 327 | static void hci_uart_tty_close(struct tty_struct *tty) |
| 328 | { |
| 329 | struct hci_uart *hu = (void *)tty->disc_data; |
| 330 | struct hci_dev *hdev; |
| 331 | |
| 332 | BT_DBG("tty %p", tty); |
| 333 | |
| 334 | /* Detach from the tty */ |
| 335 | tty->disc_data = NULL; |
| 336 | |
| 337 | if (!hu) |
| 338 | return; |
| 339 | |
| 340 | hdev = hu->hdev; |
| 341 | if (hdev) |
| 342 | hci_uart_close(hdev); |
| 343 | |
| 344 | cancel_work_sync(&hu->write_work); |
| 345 | |
| 346 | if (test_and_clear_bit(HCI_UART_PROTO_SET, &hu->flags)) { |
| 347 | if (hdev) { |
| 348 | if (test_bit(HCI_UART_REGISTERED, &hu->flags)) |
| 349 | hci_unregister_dev(hdev); |
| 350 | hci_free_dev(hdev); |
| 351 | } |
| 352 | hu->proto->close(hu); |
| 353 | } |
| 354 | |
| 355 | kfree(hu); |
| 356 | } |
| 357 | |
| 358 | /* hci_uart_tty_wakeup() |
| 359 | * |
| 360 | * Callback for transmit wakeup. Called when low level |
| 361 | * device driver can accept more send data. |
| 362 | * |
| 363 | * Arguments: tty pointer to associated tty instance data |
| 364 | * Return Value: None |
| 365 | */ |
| 366 | static void hci_uart_tty_wakeup(struct tty_struct *tty) |
| 367 | { |
| 368 | struct hci_uart *hu = (void *)tty->disc_data; |
| 369 | |
| 370 | BT_DBG(""); |
| 371 | |
| 372 | if (!hu) |
| 373 | return; |
| 374 | |
| 375 | clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); |
| 376 | |
| 377 | if (tty != hu->tty) |
| 378 | return; |
| 379 | |
| 380 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) |
| 381 | hci_uart_tx_wakeup(hu); |
| 382 | } |
| 383 | |
| 384 | /* hci_uart_tty_receive() |
| 385 | * |
| 386 | * Called by tty low level driver when receive data is |
| 387 | * available. |
| 388 | * |
| 389 | * Arguments: tty pointer to tty isntance data |
| 390 | * data pointer to received data |
| 391 | * flags pointer to flags for data |
| 392 | * count count of received data in bytes |
| 393 | * |
| 394 | * Return Value: None |
| 395 | */ |
| 396 | static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data, char *flags, int count) |
| 397 | { |
| 398 | struct hci_uart *hu = (void *)tty->disc_data; |
| 399 | |
| 400 | if (!hu || tty != hu->tty) |
| 401 | return; |
| 402 | |
| 403 | if (!test_bit(HCI_UART_PROTO_SET, &hu->flags)) |
| 404 | return; |
| 405 | |
| 406 | spin_lock(&hu->rx_lock); |
| 407 | hu->proto->recv(hu, (void *) data, count); |
| 408 | |
| 409 | if (hu->hdev) |
| 410 | hu->hdev->stat.byte_rx += count; |
| 411 | |
| 412 | spin_unlock(&hu->rx_lock); |
| 413 | |
| 414 | tty_unthrottle(tty); |
| 415 | } |
| 416 | |
| 417 | static int hci_uart_register_dev(struct hci_uart *hu) |
| 418 | { |
| 419 | struct hci_dev *hdev; |
| 420 | |
| 421 | BT_DBG(""); |
| 422 | |
| 423 | /* Initialize and register HCI device */ |
| 424 | hdev = hci_alloc_dev(); |
| 425 | if (!hdev) { |
| 426 | BT_ERR("Can't allocate HCI device"); |
| 427 | return -ENOMEM; |
| 428 | } |
| 429 | |
| 430 | hu->hdev = hdev; |
| 431 | |
| 432 | hdev->bus = HCI_UART; |
| 433 | hci_set_drvdata(hdev, hu); |
| 434 | |
| 435 | hdev->open = hci_uart_open; |
| 436 | hdev->close = hci_uart_close; |
| 437 | hdev->flush = hci_uart_flush; |
| 438 | hdev->send = hci_uart_send_frame; |
| 439 | hdev->setup = hci_uart_setup; |
| 440 | SET_HCIDEV_DEV(hdev, hu->tty->dev); |
| 441 | |
| 442 | if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags)) |
| 443 | set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks); |
| 444 | |
| 445 | if (test_bit(HCI_UART_EXT_CONFIG, &hu->hdev_flags)) |
| 446 | set_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks); |
| 447 | |
| 448 | if (!test_bit(HCI_UART_RESET_ON_INIT, &hu->hdev_flags)) |
| 449 | set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks); |
| 450 | |
| 451 | if (test_bit(HCI_UART_CREATE_AMP, &hu->hdev_flags)) |
| 452 | hdev->dev_type = HCI_AMP; |
| 453 | else |
| 454 | hdev->dev_type = HCI_BREDR; |
| 455 | |
| 456 | if (test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) |
| 457 | return 0; |
| 458 | |
| 459 | if (hci_register_dev(hdev) < 0) { |
| 460 | BT_ERR("Can't register HCI device"); |
| 461 | hci_free_dev(hdev); |
| 462 | return -ENODEV; |
| 463 | } |
| 464 | |
| 465 | set_bit(HCI_UART_REGISTERED, &hu->flags); |
| 466 | |
| 467 | return 0; |
| 468 | } |
| 469 | |
| 470 | static int hci_uart_set_proto(struct hci_uart *hu, int id) |
| 471 | { |
| 472 | struct hci_uart_proto *p; |
| 473 | int err; |
| 474 | |
| 475 | p = hci_uart_get_proto(id); |
| 476 | if (!p) |
| 477 | return -EPROTONOSUPPORT; |
| 478 | |
| 479 | err = p->open(hu); |
| 480 | if (err) |
| 481 | return err; |
| 482 | |
| 483 | hu->proto = p; |
| 484 | |
| 485 | err = hci_uart_register_dev(hu); |
| 486 | if (err) { |
| 487 | p->close(hu); |
| 488 | return err; |
| 489 | } |
| 490 | |
| 491 | return 0; |
| 492 | } |
| 493 | |
| 494 | static int hci_uart_set_flags(struct hci_uart *hu, unsigned long flags) |
| 495 | { |
| 496 | unsigned long valid_flags = BIT(HCI_UART_RAW_DEVICE) | |
| 497 | BIT(HCI_UART_RESET_ON_INIT) | |
| 498 | BIT(HCI_UART_CREATE_AMP) | |
| 499 | BIT(HCI_UART_INIT_PENDING) | |
| 500 | BIT(HCI_UART_EXT_CONFIG); |
| 501 | |
| 502 | if (flags & ~valid_flags) |
| 503 | return -EINVAL; |
| 504 | |
| 505 | hu->hdev_flags = flags; |
| 506 | |
| 507 | return 0; |
| 508 | } |
| 509 | |
| 510 | /* hci_uart_tty_ioctl() |
| 511 | * |
| 512 | * Process IOCTL system call for the tty device. |
| 513 | * |
| 514 | * Arguments: |
| 515 | * |
| 516 | * tty pointer to tty instance data |
| 517 | * file pointer to open file object for device |
| 518 | * cmd IOCTL command code |
| 519 | * arg argument for IOCTL call (cmd dependent) |
| 520 | * |
| 521 | * Return Value: Command dependent |
| 522 | */ |
| 523 | static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file * file, |
| 524 | unsigned int cmd, unsigned long arg) |
| 525 | { |
| 526 | struct hci_uart *hu = (void *)tty->disc_data; |
| 527 | int err = 0; |
| 528 | |
| 529 | BT_DBG(""); |
| 530 | |
| 531 | /* Verify the status of the device */ |
| 532 | if (!hu) |
| 533 | return -EBADF; |
| 534 | |
| 535 | switch (cmd) { |
| 536 | case HCIUARTSETPROTO: |
| 537 | if (!test_and_set_bit(HCI_UART_PROTO_SET, &hu->flags)) { |
| 538 | err = hci_uart_set_proto(hu, arg); |
| 539 | if (err) { |
| 540 | clear_bit(HCI_UART_PROTO_SET, &hu->flags); |
| 541 | return err; |
| 542 | } |
| 543 | } else |
| 544 | return -EBUSY; |
| 545 | break; |
| 546 | |
| 547 | case HCIUARTGETPROTO: |
| 548 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) |
| 549 | return hu->proto->id; |
| 550 | return -EUNATCH; |
| 551 | |
| 552 | case HCIUARTGETDEVICE: |
| 553 | if (test_bit(HCI_UART_REGISTERED, &hu->flags)) |
| 554 | return hu->hdev->id; |
| 555 | return -EUNATCH; |
| 556 | |
| 557 | case HCIUARTSETFLAGS: |
| 558 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) |
| 559 | return -EBUSY; |
| 560 | err = hci_uart_set_flags(hu, arg); |
| 561 | if (err) |
| 562 | return err; |
| 563 | break; |
| 564 | |
| 565 | case HCIUARTGETFLAGS: |
| 566 | return hu->hdev_flags; |
| 567 | |
| 568 | default: |
| 569 | err = n_tty_ioctl_helper(tty, file, cmd, arg); |
| 570 | break; |
| 571 | } |
| 572 | |
| 573 | return err; |
| 574 | } |
| 575 | |
| 576 | /* |
| 577 | * We don't provide read/write/poll interface for user space. |
| 578 | */ |
| 579 | static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file, |
| 580 | unsigned char __user *buf, size_t nr) |
| 581 | { |
| 582 | return 0; |
| 583 | } |
| 584 | |
| 585 | static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file, |
| 586 | const unsigned char *data, size_t count) |
| 587 | { |
| 588 | return 0; |
| 589 | } |
| 590 | |
| 591 | static unsigned int hci_uart_tty_poll(struct tty_struct *tty, |
| 592 | struct file *filp, poll_table *wait) |
| 593 | { |
| 594 | return 0; |
| 595 | } |
| 596 | |
| 597 | static int __init hci_uart_init(void) |
| 598 | { |
| 599 | static struct tty_ldisc_ops hci_uart_ldisc; |
| 600 | int err; |
| 601 | |
| 602 | BT_INFO("HCI UART driver ver %s", VERSION); |
| 603 | |
| 604 | /* Register the tty discipline */ |
| 605 | |
| 606 | memset(&hci_uart_ldisc, 0, sizeof (hci_uart_ldisc)); |
| 607 | hci_uart_ldisc.magic = TTY_LDISC_MAGIC; |
| 608 | hci_uart_ldisc.name = "n_hci"; |
| 609 | hci_uart_ldisc.open = hci_uart_tty_open; |
| 610 | hci_uart_ldisc.close = hci_uart_tty_close; |
| 611 | hci_uart_ldisc.read = hci_uart_tty_read; |
| 612 | hci_uart_ldisc.write = hci_uart_tty_write; |
| 613 | hci_uart_ldisc.ioctl = hci_uart_tty_ioctl; |
| 614 | hci_uart_ldisc.poll = hci_uart_tty_poll; |
| 615 | hci_uart_ldisc.receive_buf = hci_uart_tty_receive; |
| 616 | hci_uart_ldisc.write_wakeup = hci_uart_tty_wakeup; |
| 617 | hci_uart_ldisc.owner = THIS_MODULE; |
| 618 | |
| 619 | err = tty_register_ldisc(N_HCI, &hci_uart_ldisc); |
| 620 | if (err) { |
| 621 | BT_ERR("HCI line discipline registration failed. (%d)", err); |
| 622 | return err; |
| 623 | } |
| 624 | |
| 625 | #ifdef CONFIG_BT_HCIUART_H4 |
| 626 | h4_init(); |
| 627 | #endif |
| 628 | #ifdef CONFIG_BT_HCIUART_BCSP |
| 629 | bcsp_init(); |
| 630 | #endif |
| 631 | #ifdef CONFIG_BT_HCIUART_LL |
| 632 | ll_init(); |
| 633 | #endif |
| 634 | #ifdef CONFIG_BT_HCIUART_ATH3K |
| 635 | ath_init(); |
| 636 | #endif |
| 637 | #ifdef CONFIG_BT_HCIUART_3WIRE |
| 638 | h5_init(); |
| 639 | #endif |
| 640 | |
| 641 | return 0; |
| 642 | } |
| 643 | |
| 644 | static void __exit hci_uart_exit(void) |
| 645 | { |
| 646 | int err; |
| 647 | |
| 648 | #ifdef CONFIG_BT_HCIUART_H4 |
| 649 | h4_deinit(); |
| 650 | #endif |
| 651 | #ifdef CONFIG_BT_HCIUART_BCSP |
| 652 | bcsp_deinit(); |
| 653 | #endif |
| 654 | #ifdef CONFIG_BT_HCIUART_LL |
| 655 | ll_deinit(); |
| 656 | #endif |
| 657 | #ifdef CONFIG_BT_HCIUART_ATH3K |
| 658 | ath_deinit(); |
| 659 | #endif |
| 660 | #ifdef CONFIG_BT_HCIUART_3WIRE |
| 661 | h5_deinit(); |
| 662 | #endif |
| 663 | |
| 664 | /* Release tty registration of line discipline */ |
| 665 | err = tty_unregister_ldisc(N_HCI); |
| 666 | if (err) |
| 667 | BT_ERR("Can't unregister HCI line discipline (%d)", err); |
| 668 | } |
| 669 | |
| 670 | module_init(hci_uart_init); |
| 671 | module_exit(hci_uart_exit); |
| 672 | |
| 673 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
| 674 | MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION); |
| 675 | MODULE_VERSION(VERSION); |
| 676 | MODULE_LICENSE("GPL"); |
| 677 | MODULE_ALIAS_LDISC(N_HCI); |