Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 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 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/module.h> |
| 27 | |
| 28 | #include <linux/kernel.h> |
| 29 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 49 | #define VERSION "2.2" |
| 50 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | static int reset = 0; |
| 52 | |
| 53 | static struct hci_uart_proto *hup[HCI_UART_MAX_PROTO]; |
| 54 | |
| 55 | int hci_uart_register_proto(struct hci_uart_proto *p) |
| 56 | { |
| 57 | if (p->id >= HCI_UART_MAX_PROTO) |
| 58 | return -EINVAL; |
| 59 | |
| 60 | if (hup[p->id]) |
| 61 | return -EEXIST; |
| 62 | |
| 63 | hup[p->id] = p; |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 64 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | return 0; |
| 66 | } |
| 67 | |
| 68 | int hci_uart_unregister_proto(struct hci_uart_proto *p) |
| 69 | { |
| 70 | if (p->id >= HCI_UART_MAX_PROTO) |
| 71 | return -EINVAL; |
| 72 | |
| 73 | if (!hup[p->id]) |
| 74 | return -EINVAL; |
| 75 | |
| 76 | hup[p->id] = NULL; |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 77 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | return 0; |
| 79 | } |
| 80 | |
| 81 | static struct hci_uart_proto *hci_uart_get_proto(unsigned int id) |
| 82 | { |
| 83 | if (id >= HCI_UART_MAX_PROTO) |
| 84 | return NULL; |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 85 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | return hup[id]; |
| 87 | } |
| 88 | |
| 89 | static inline void hci_uart_tx_complete(struct hci_uart *hu, int pkt_type) |
| 90 | { |
| 91 | struct hci_dev *hdev = hu->hdev; |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 92 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | /* Update HCI stat counters */ |
| 94 | switch (pkt_type) { |
| 95 | case HCI_COMMAND_PKT: |
| 96 | hdev->stat.cmd_tx++; |
| 97 | break; |
| 98 | |
| 99 | case HCI_ACLDATA_PKT: |
| 100 | hdev->stat.acl_tx++; |
| 101 | break; |
| 102 | |
| 103 | case HCI_SCODATA_PKT: |
Karl Beldan | 7f8f272 | 2010-10-07 21:57:10 +0200 | [diff] [blame] | 104 | hdev->stat.sco_tx++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | break; |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | static inline struct sk_buff *hci_uart_dequeue(struct hci_uart *hu) |
| 110 | { |
| 111 | struct sk_buff *skb = hu->tx_skb; |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | if (!skb) |
| 114 | skb = hu->proto->dequeue(hu); |
| 115 | else |
| 116 | hu->tx_skb = NULL; |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 117 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | return skb; |
| 119 | } |
| 120 | |
| 121 | int hci_uart_tx_wakeup(struct hci_uart *hu) |
| 122 | { |
| 123 | struct tty_struct *tty = hu->tty; |
| 124 | struct hci_dev *hdev = hu->hdev; |
| 125 | struct sk_buff *skb; |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 126 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | if (test_and_set_bit(HCI_UART_SENDING, &hu->tx_state)) { |
| 128 | set_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); |
| 129 | return 0; |
| 130 | } |
| 131 | |
| 132 | BT_DBG(""); |
| 133 | |
| 134 | restart: |
| 135 | clear_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); |
| 136 | |
| 137 | while ((skb = hci_uart_dequeue(hu))) { |
| 138 | int len; |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 139 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); |
Alan Cox | f34d7a5 | 2008-04-30 00:54:13 -0700 | [diff] [blame] | 141 | len = tty->ops->write(tty, skb->data, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | hdev->stat.byte_tx += len; |
| 143 | |
| 144 | skb_pull(skb, len); |
| 145 | if (skb->len) { |
| 146 | hu->tx_skb = skb; |
| 147 | break; |
| 148 | } |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 149 | |
Marcel Holtmann | 0d48d93 | 2005-08-09 20:30:28 -0700 | [diff] [blame] | 150 | hci_uart_tx_complete(hu, bt_cb(skb)->pkt_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | kfree_skb(skb); |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 152 | } |
| 153 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | if (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state)) |
| 155 | goto restart; |
| 156 | |
| 157 | clear_bit(HCI_UART_SENDING, &hu->tx_state); |
| 158 | return 0; |
| 159 | } |
| 160 | |
| 161 | /* ------- Interface to HCI layer ------ */ |
| 162 | /* Initialize device */ |
| 163 | static int hci_uart_open(struct hci_dev *hdev) |
| 164 | { |
| 165 | BT_DBG("%s %p", hdev->name, hdev); |
| 166 | |
| 167 | /* Nothing to do for UART driver */ |
| 168 | |
| 169 | set_bit(HCI_RUNNING, &hdev->flags); |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 170 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | /* Reset device */ |
| 175 | static int hci_uart_flush(struct hci_dev *hdev) |
| 176 | { |
| 177 | struct hci_uart *hu = (struct hci_uart *) hdev->driver_data; |
| 178 | struct tty_struct *tty = hu->tty; |
| 179 | |
| 180 | BT_DBG("hdev %p tty %p", hdev, tty); |
| 181 | |
| 182 | if (hu->tx_skb) { |
| 183 | kfree_skb(hu->tx_skb); hu->tx_skb = NULL; |
| 184 | } |
| 185 | |
| 186 | /* Flush any pending characters in the driver and discipline. */ |
| 187 | tty_ldisc_flush(tty); |
Alan Cox | f34d7a5 | 2008-04-30 00:54:13 -0700 | [diff] [blame] | 188 | tty_driver_flush_buffer(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | |
| 190 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) |
| 191 | hu->proto->flush(hu); |
| 192 | |
| 193 | return 0; |
| 194 | } |
| 195 | |
| 196 | /* Close device */ |
| 197 | static int hci_uart_close(struct hci_dev *hdev) |
| 198 | { |
| 199 | BT_DBG("hdev %p", hdev); |
| 200 | |
| 201 | if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags)) |
| 202 | return 0; |
| 203 | |
| 204 | hci_uart_flush(hdev); |
David Newall | 3611f4d2 | 2008-02-11 21:41:30 -0800 | [diff] [blame] | 205 | hdev->flush = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | return 0; |
| 207 | } |
| 208 | |
| 209 | /* Send frames from HCI layer */ |
| 210 | static int hci_uart_send_frame(struct sk_buff *skb) |
| 211 | { |
| 212 | struct hci_dev* hdev = (struct hci_dev *) skb->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | struct hci_uart *hu; |
| 214 | |
| 215 | if (!hdev) { |
André Goddard Rosa | af901ca | 2009-11-14 13:09:05 -0200 | [diff] [blame] | 216 | BT_ERR("Frame for unknown device (hdev=NULL)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | return -ENODEV; |
| 218 | } |
| 219 | |
| 220 | if (!test_bit(HCI_RUNNING, &hdev->flags)) |
| 221 | return -EBUSY; |
| 222 | |
| 223 | hu = (struct hci_uart *) hdev->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | |
Marcel Holtmann | 0d48d93 | 2005-08-09 20:30:28 -0700 | [diff] [blame] | 225 | BT_DBG("%s: type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
| 227 | hu->proto->enqueue(hu, skb); |
| 228 | |
| 229 | hci_uart_tx_wakeup(hu); |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 230 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | return 0; |
| 232 | } |
| 233 | |
| 234 | static void hci_uart_destruct(struct hci_dev *hdev) |
| 235 | { |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 236 | if (!hdev) |
| 237 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
| 239 | BT_DBG("%s", hdev->name); |
Marcel Holtmann | 7785162 | 2006-09-21 16:23:19 +0200 | [diff] [blame] | 240 | kfree(hdev->driver_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | /* ------ LDISC part ------ */ |
| 244 | /* hci_uart_tty_open |
| 245 | * |
| 246 | * Called when line discipline changed to HCI_UART. |
| 247 | * |
| 248 | * Arguments: |
| 249 | * tty pointer to tty info structure |
| 250 | * Return Value: |
| 251 | * 0 if success, otherwise error code |
| 252 | */ |
| 253 | static int hci_uart_tty_open(struct tty_struct *tty) |
| 254 | { |
| 255 | struct hci_uart *hu = (void *) tty->disc_data; |
| 256 | |
| 257 | BT_DBG("tty %p", tty); |
| 258 | |
Alan Cox | c19483c | 2010-10-22 14:11:26 +0100 | [diff] [blame] | 259 | /* FIXME: This btw is bogus, nothing requires the old ldisc to clear |
| 260 | the pointer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | if (hu) |
| 262 | return -EEXIST; |
| 263 | |
Alan Cox | c19483c | 2010-10-22 14:11:26 +0100 | [diff] [blame] | 264 | /* Error if the tty has no write op instead of leaving an exploitable |
| 265 | hole */ |
| 266 | if (tty->ops->write == NULL) |
| 267 | return -EOPNOTSUPP; |
| 268 | |
Deepak Saxena | 089b1db | 2005-11-07 01:01:26 -0800 | [diff] [blame] | 269 | if (!(hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL))) { |
Marcel Holtmann | 7785162 | 2006-09-21 16:23:19 +0200 | [diff] [blame] | 270 | BT_ERR("Can't allocate control structure"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | return -ENFILE; |
| 272 | } |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 273 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | tty->disc_data = hu; |
| 275 | hu->tty = tty; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 276 | tty->receive_room = 65536; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | |
| 278 | spin_lock_init(&hu->rx_lock); |
| 279 | |
| 280 | /* Flush any pending characters in the driver and line discipline. */ |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 281 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | /* FIXME: why is this needed. Note don't use ldisc_ref here as the |
| 283 | open path is before the ldisc is referencable */ |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 284 | |
Alan Cox | c65c9bc | 2009-06-11 12:50:12 +0100 | [diff] [blame] | 285 | if (tty->ldisc->ops->flush_buffer) |
| 286 | tty->ldisc->ops->flush_buffer(tty); |
Alan Cox | f34d7a5 | 2008-04-30 00:54:13 -0700 | [diff] [blame] | 287 | tty_driver_flush_buffer(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | |
| 289 | return 0; |
| 290 | } |
| 291 | |
| 292 | /* hci_uart_tty_close() |
| 293 | * |
| 294 | * Called when the line discipline is changed to something |
| 295 | * else, the tty is closed, or the tty detects a hangup. |
| 296 | */ |
| 297 | static void hci_uart_tty_close(struct tty_struct *tty) |
| 298 | { |
| 299 | struct hci_uart *hu = (void *)tty->disc_data; |
| 300 | |
| 301 | BT_DBG("tty %p", tty); |
| 302 | |
| 303 | /* Detach from the tty */ |
| 304 | tty->disc_data = NULL; |
| 305 | |
| 306 | if (hu) { |
| 307 | struct hci_dev *hdev = hu->hdev; |
Marcel Holtmann | 22ad420 | 2007-05-09 09:15:40 +0200 | [diff] [blame] | 308 | |
| 309 | if (hdev) |
| 310 | hci_uart_close(hdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | |
| 312 | if (test_and_clear_bit(HCI_UART_PROTO_SET, &hu->flags)) { |
| 313 | hu->proto->close(hu); |
Jun Nie | d931956 | 2010-12-07 14:03:38 +0800 | [diff] [blame] | 314 | if (hdev) { |
| 315 | hci_unregister_dev(hdev); |
| 316 | hci_free_dev(hdev); |
| 317 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | } |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | /* hci_uart_tty_wakeup() |
| 323 | * |
| 324 | * Callback for transmit wakeup. Called when low level |
| 325 | * device driver can accept more send data. |
| 326 | * |
| 327 | * Arguments: tty pointer to associated tty instance data |
| 328 | * Return Value: None |
| 329 | */ |
| 330 | static void hci_uart_tty_wakeup(struct tty_struct *tty) |
| 331 | { |
| 332 | struct hci_uart *hu = (void *)tty->disc_data; |
| 333 | |
| 334 | BT_DBG(""); |
| 335 | |
| 336 | if (!hu) |
| 337 | return; |
| 338 | |
| 339 | clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); |
| 340 | |
| 341 | if (tty != hu->tty) |
| 342 | return; |
| 343 | |
| 344 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) |
| 345 | hci_uart_tx_wakeup(hu); |
| 346 | } |
| 347 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | /* hci_uart_tty_receive() |
| 349 | * |
| 350 | * Called by tty low level driver when receive data is |
| 351 | * available. |
| 352 | * |
| 353 | * Arguments: tty pointer to tty isntance data |
| 354 | * data pointer to received data |
| 355 | * flags pointer to flags for data |
| 356 | * count count of received data in bytes |
| 357 | * |
Linus Torvalds | 55db4c6 | 2011-06-04 06:33:24 +0900 | [diff] [blame] | 358 | * Return Value: None |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | */ |
Linus Torvalds | 55db4c6 | 2011-06-04 06:33:24 +0900 | [diff] [blame] | 360 | static void hci_uart_tty_receive(struct tty_struct *tty, const u8 *data, char *flags, int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | { |
| 362 | struct hci_uart *hu = (void *)tty->disc_data; |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 363 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | if (!hu || tty != hu->tty) |
Linus Torvalds | 55db4c6 | 2011-06-04 06:33:24 +0900 | [diff] [blame] | 365 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | |
| 367 | if (!test_bit(HCI_UART_PROTO_SET, &hu->flags)) |
Linus Torvalds | 55db4c6 | 2011-06-04 06:33:24 +0900 | [diff] [blame] | 368 | return; |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 369 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | spin_lock(&hu->rx_lock); |
Linus Torvalds | 55db4c6 | 2011-06-04 06:33:24 +0900 | [diff] [blame] | 371 | hu->proto->recv(hu, (void *) data, count); |
| 372 | hu->hdev->stat.byte_rx += count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | spin_unlock(&hu->rx_lock); |
| 374 | |
Alan Cox | 39c2e60 | 2008-04-30 00:54:18 -0700 | [diff] [blame] | 375 | tty_unthrottle(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | } |
| 377 | |
| 378 | static int hci_uart_register_dev(struct hci_uart *hu) |
| 379 | { |
| 380 | struct hci_dev *hdev; |
| 381 | |
| 382 | BT_DBG(""); |
| 383 | |
| 384 | /* Initialize and register HCI device */ |
| 385 | hdev = hci_alloc_dev(); |
| 386 | if (!hdev) { |
| 387 | BT_ERR("Can't allocate HCI device"); |
| 388 | return -ENOMEM; |
| 389 | } |
| 390 | |
| 391 | hu->hdev = hdev; |
| 392 | |
Marcel Holtmann | c13854c | 2010-02-08 15:27:07 +0100 | [diff] [blame] | 393 | hdev->bus = HCI_UART; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | hdev->driver_data = hu; |
| 395 | |
| 396 | hdev->open = hci_uart_open; |
| 397 | hdev->close = hci_uart_close; |
| 398 | hdev->flush = hci_uart_flush; |
| 399 | hdev->send = hci_uart_send_frame; |
| 400 | hdev->destruct = hci_uart_destruct; |
Andrei Warkentin | 7f4b2b0 | 2011-02-11 17:19:26 -0600 | [diff] [blame] | 401 | hdev->parent = hu->tty->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
| 403 | hdev->owner = THIS_MODULE; |
| 404 | |
Marcel Holtmann | 7a9d402 | 2008-11-30 12:17:26 +0100 | [diff] [blame] | 405 | if (!reset) |
| 406 | set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | |
Johan Hedberg | 63c7d09 | 2010-07-12 11:37:04 -0300 | [diff] [blame] | 408 | if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags)) |
| 409 | set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks); |
| 410 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | if (hci_register_dev(hdev) < 0) { |
| 412 | BT_ERR("Can't register HCI device"); |
| 413 | hci_free_dev(hdev); |
| 414 | return -ENODEV; |
| 415 | } |
| 416 | |
| 417 | return 0; |
| 418 | } |
| 419 | |
| 420 | static int hci_uart_set_proto(struct hci_uart *hu, int id) |
| 421 | { |
| 422 | struct hci_uart_proto *p; |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 423 | int err; |
| 424 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | p = hci_uart_get_proto(id); |
| 426 | if (!p) |
| 427 | return -EPROTONOSUPPORT; |
| 428 | |
| 429 | err = p->open(hu); |
| 430 | if (err) |
| 431 | return err; |
| 432 | |
| 433 | hu->proto = p; |
| 434 | |
| 435 | err = hci_uart_register_dev(hu); |
| 436 | if (err) { |
| 437 | p->close(hu); |
| 438 | return err; |
| 439 | } |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 440 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | return 0; |
| 442 | } |
| 443 | |
| 444 | /* hci_uart_tty_ioctl() |
| 445 | * |
| 446 | * Process IOCTL system call for the tty device. |
| 447 | * |
| 448 | * Arguments: |
| 449 | * |
| 450 | * tty pointer to tty instance data |
| 451 | * file pointer to open file object for device |
| 452 | * cmd IOCTL command code |
| 453 | * arg argument for IOCTL call (cmd dependent) |
| 454 | * |
| 455 | * Return Value: Command dependent |
| 456 | */ |
| 457 | static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file * file, |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 458 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | { |
| 460 | struct hci_uart *hu = (void *)tty->disc_data; |
| 461 | int err = 0; |
| 462 | |
| 463 | BT_DBG(""); |
| 464 | |
| 465 | /* Verify the status of the device */ |
| 466 | if (!hu) |
| 467 | return -EBADF; |
| 468 | |
| 469 | switch (cmd) { |
| 470 | case HCIUARTSETPROTO: |
| 471 | if (!test_and_set_bit(HCI_UART_PROTO_SET, &hu->flags)) { |
| 472 | err = hci_uart_set_proto(hu, arg); |
| 473 | if (err) { |
| 474 | clear_bit(HCI_UART_PROTO_SET, &hu->flags); |
| 475 | return err; |
| 476 | } |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 477 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | return -EBUSY; |
Marcel Holtmann | c33be3c | 2007-05-09 09:15:45 +0200 | [diff] [blame] | 479 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | |
| 481 | case HCIUARTGETPROTO: |
| 482 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) |
| 483 | return hu->proto->id; |
| 484 | return -EUNATCH; |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 485 | |
Marcel Holtmann | d215874 | 2007-05-09 09:15:35 +0200 | [diff] [blame] | 486 | case HCIUARTGETDEVICE: |
| 487 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) |
| 488 | return hu->hdev->id; |
| 489 | return -EUNATCH; |
| 490 | |
Johan Hedberg | 63c7d09 | 2010-07-12 11:37:04 -0300 | [diff] [blame] | 491 | case HCIUARTSETFLAGS: |
| 492 | if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) |
| 493 | return -EBUSY; |
| 494 | hu->hdev_flags = arg; |
| 495 | break; |
| 496 | |
| 497 | case HCIUARTGETFLAGS: |
| 498 | return hu->hdev_flags; |
| 499 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | default: |
Alan Cox | 47afa7a | 2008-10-13 10:44:17 +0100 | [diff] [blame] | 501 | err = n_tty_ioctl_helper(tty, file, cmd, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | break; |
| 503 | }; |
| 504 | |
| 505 | return err; |
| 506 | } |
| 507 | |
| 508 | /* |
| 509 | * We don't provide read/write/poll interface for user space. |
| 510 | */ |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 511 | static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file, |
| 512 | unsigned char __user *buf, size_t nr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | { |
| 514 | return 0; |
| 515 | } |
| 516 | |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 517 | static ssize_t hci_uart_tty_write(struct tty_struct *tty, struct file *file, |
| 518 | const unsigned char *data, size_t count) |
| 519 | { |
| 520 | return 0; |
| 521 | } |
| 522 | |
| 523 | static unsigned int hci_uart_tty_poll(struct tty_struct *tty, |
| 524 | struct file *filp, poll_table *wait) |
| 525 | { |
| 526 | return 0; |
| 527 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | |
| 529 | static int __init hci_uart_init(void) |
| 530 | { |
Alan Cox | a352def | 2008-07-16 21:53:12 +0100 | [diff] [blame] | 531 | static struct tty_ldisc_ops hci_uart_ldisc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | int err; |
| 533 | |
| 534 | BT_INFO("HCI UART driver ver %s", VERSION); |
| 535 | |
| 536 | /* Register the tty discipline */ |
| 537 | |
| 538 | memset(&hci_uart_ldisc, 0, sizeof (hci_uart_ldisc)); |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 539 | hci_uart_ldisc.magic = TTY_LDISC_MAGIC; |
| 540 | hci_uart_ldisc.name = "n_hci"; |
| 541 | hci_uart_ldisc.open = hci_uart_tty_open; |
| 542 | hci_uart_ldisc.close = hci_uart_tty_close; |
| 543 | hci_uart_ldisc.read = hci_uart_tty_read; |
| 544 | hci_uart_ldisc.write = hci_uart_tty_write; |
| 545 | hci_uart_ldisc.ioctl = hci_uart_tty_ioctl; |
| 546 | hci_uart_ldisc.poll = hci_uart_tty_poll; |
Marcel Holtmann | 0372a66 | 2005-10-28 19:20:45 +0200 | [diff] [blame] | 547 | hci_uart_ldisc.receive_buf = hci_uart_tty_receive; |
| 548 | hci_uart_ldisc.write_wakeup = hci_uart_tty_wakeup; |
| 549 | hci_uart_ldisc.owner = THIS_MODULE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | |
| 551 | if ((err = tty_register_ldisc(N_HCI, &hci_uart_ldisc))) { |
| 552 | BT_ERR("HCI line discipline registration failed. (%d)", err); |
| 553 | return err; |
| 554 | } |
| 555 | |
| 556 | #ifdef CONFIG_BT_HCIUART_H4 |
| 557 | h4_init(); |
| 558 | #endif |
| 559 | #ifdef CONFIG_BT_HCIUART_BCSP |
| 560 | bcsp_init(); |
| 561 | #endif |
Ohad Ben-Cohen | 166d2f6 | 2007-10-20 13:42:36 +0200 | [diff] [blame] | 562 | #ifdef CONFIG_BT_HCIUART_LL |
| 563 | ll_init(); |
| 564 | #endif |
Suraj Sumangala | b3190df | 2010-07-19 12:34:07 +0530 | [diff] [blame] | 565 | #ifdef CONFIG_BT_HCIUART_ATH3K |
| 566 | ath_init(); |
| 567 | #endif |
Ohad Ben-Cohen | 166d2f6 | 2007-10-20 13:42:36 +0200 | [diff] [blame] | 568 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | return 0; |
| 570 | } |
| 571 | |
| 572 | static void __exit hci_uart_exit(void) |
| 573 | { |
| 574 | int err; |
| 575 | |
| 576 | #ifdef CONFIG_BT_HCIUART_H4 |
| 577 | h4_deinit(); |
| 578 | #endif |
| 579 | #ifdef CONFIG_BT_HCIUART_BCSP |
| 580 | bcsp_deinit(); |
| 581 | #endif |
Ohad Ben-Cohen | 166d2f6 | 2007-10-20 13:42:36 +0200 | [diff] [blame] | 582 | #ifdef CONFIG_BT_HCIUART_LL |
| 583 | ll_deinit(); |
| 584 | #endif |
Suraj Sumangala | b3190df | 2010-07-19 12:34:07 +0530 | [diff] [blame] | 585 | #ifdef CONFIG_BT_HCIUART_ATH3K |
| 586 | ath_deinit(); |
| 587 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | |
| 589 | /* Release tty registration of line discipline */ |
Alexey Dobriyan | 64ccd71 | 2005-06-23 00:10:33 -0700 | [diff] [blame] | 590 | if ((err = tty_unregister_ldisc(N_HCI))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | BT_ERR("Can't unregister HCI line discipline (%d)", err); |
| 592 | } |
| 593 | |
| 594 | module_init(hci_uart_init); |
| 595 | module_exit(hci_uart_exit); |
| 596 | |
| 597 | module_param(reset, bool, 0644); |
| 598 | MODULE_PARM_DESC(reset, "Send HCI reset command on initialization"); |
| 599 | |
Marcel Holtmann | 63fbd24 | 2008-08-18 13:23:53 +0200 | [diff] [blame] | 600 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | MODULE_DESCRIPTION("Bluetooth HCI UART driver ver " VERSION); |
| 602 | MODULE_VERSION(VERSION); |
| 603 | MODULE_LICENSE("GPL"); |
| 604 | MODULE_ALIAS_LDISC(N_HCI); |