net/bluetooth/hidp/core.c

   1 /*
   2    HIDP implementation for Linux Bluetooth stack (BlueZ).
   3    Copyright (C) 2003-2004 Marcel Holtmann <marcel@holtmann.org>
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License version 2 as
   7    published by the Free Software Foundation;
   8
   9    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  10    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  11    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
  12    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
  13    CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
  14    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17
  18    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
  19    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
  20    SOFTWARE IS DISCLAIMED.
  21 */
  22
  23 #include <linux/module.h>
  24
  25 #include <linux/types.h>
  26 #include <linux/errno.h>
  27 #include <linux/kernel.h>
  28 #include <linux/sched.h>
  29 #include <linux/slab.h>
  30 #include <linux/poll.h>
  31 #include <linux/freezer.h>
  32 #include <linux/fcntl.h>
  33 #include <linux/skbuff.h>
  34 #include <linux/socket.h>
  35 #include <linux/ioctl.h>
  36 #include <linux/file.h>
  37 #include <linux/init.h>
  38 #include <linux/wait.h>
  39 #include <net/sock.h>
  40
  41 #include <linux/input.h>
  42 #include <linux/hid.h>
  43
  44 #include <net/bluetooth/bluetooth.h>
  45 #include <net/bluetooth/hci_core.h>
  46 #include <net/bluetooth/l2cap.h>
  47
  48 #include "hidp.h"
  49
  50 #ifndef CONFIG_BT_HIDP_DEBUG
  51 #undef  BT_DBG
  52 #define BT_DBG(D...)
  53 #endif
  54
  55 #define VERSION "1.2"
  56
  57 static DECLARE_RWSEM(hidp_session_sem);
  58 static LIST_HEAD(hidp_session_list);
  59
  60 static unsigned char hidp_keycode[256] = {
  61           0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
  62          50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
  63           4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
  64          27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
  65          65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
  66         105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
  67          72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
  68         191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
  69         115,114,  0,  0,  0,121,  0, 89, 93,124, 92, 94, 95,  0,  0,  0,
  70         122,123, 90, 91, 85,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
  71           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
  72           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
  73           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
  74           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
  75          29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
  76         150,158,159,128,136,177,178,176,142,152,173,140
  77 };
  78
  79 static unsigned char hidp_mkeyspat[] = { 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 };
  80
  81 static struct hidp_session *__hidp_get_session(bdaddr_t *bdaddr)
  82 {
  83         struct hidp_session *session;
  84         struct list_head *p;
  85
  86         BT_DBG("");
  87
  88         list_for_each(p, &hidp_session_list) {
  89                 session = list_entry(p, struct hidp_session, list);
  90                 if (!bacmp(bdaddr, &session->bdaddr))
  91                         return session;
  92         }
  93         return NULL;
  94 }
  95
  96 static void __hidp_link_session(struct hidp_session *session)
  97 {
  98         __module_get(THIS_MODULE);
  99         list_add(&session->list, &hidp_session_list);
 100 }
 101
 102 static void __hidp_unlink_session(struct hidp_session *session)
 103 {
 104         list_del(&session->list);
 105         module_put(THIS_MODULE);
 106 }
 107
 108 static void __hidp_copy_session(struct hidp_session *session, struct hidp_conninfo *ci)
 109 {
 110         bacpy(&ci->bdaddr, &session->bdaddr);
 111
 112         ci->flags = session->flags;
 113         ci->state = session->state;
 114
 115         ci->vendor  = 0x0000;
 116         ci->product = 0x0000;
 117         ci->version = 0x0000;
 118         memset(ci->name, 0, 128);
 119
 120         if (session->input) {
 121                 ci->vendor  = session->input->id.vendor;
 122                 ci->product = session->input->id.product;
 123                 ci->version = session->input->id.version;
 124                 if (session->input->name)
 125                         strncpy(ci->name, session->input->name, 128);
 126                 else
 127                         strncpy(ci->name, "HID Boot Device", 128);
 128         }
 129
 130         if (session->hid) {
 131                 ci->vendor  = session->hid->vendor;
 132                 ci->product = session->hid->product;
 133                 ci->version = session->hid->version;
 134                 strncpy(ci->name, session->hid->name, 128);
 135         }
 136 }
 137
 138 static int hidp_queue_event(struct hidp_session *session, struct input_dev *dev,
 139                                 unsigned int type, unsigned int code, int value)
 140 {
 141         unsigned char newleds;
 142         struct sk_buff *skb;
 143
 144         BT_DBG("session %p type %d code %d value %d", session, type, code, value);
 145
 146         if (type != EV_LED)
 147                 return -1;
 148
 149         newleds = (!!test_bit(LED_KANA,    dev->led) << 3) |
 150                   (!!test_bit(LED_COMPOSE, dev->led) << 3) |
 151                   (!!test_bit(LED_SCROLLL, dev->led) << 2) |
 152                   (!!test_bit(LED_CAPSL,   dev->led) << 1) |
 153                   (!!test_bit(LED_NUML,    dev->led));
 154
 155         if (session->leds == newleds)
 156                 return 0;
 157
 158         session->leds = newleds;
 159
 160         if (!(skb = alloc_skb(3, GFP_ATOMIC))) {
 161                 BT_ERR("Can't allocate memory for new frame");
 162                 return -ENOMEM;
 163         }
 164
 165         *skb_put(skb, 1) = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT;
 166         *skb_put(skb, 1) = 0x01;
 167         *skb_put(skb, 1) = newleds;
 168
 169         skb_queue_tail(&session->intr_transmit, skb);
 170
 171         hidp_schedule(session);
 172
 173         return 0;
 174 }
 175
 176 static int hidp_hidinput_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
 177 {
 178         struct hid_device *hid = input_get_drvdata(dev);
 179         struct hidp_session *session = hid->driver_data;
 180
 181         return hidp_queue_event(session, dev, type, code, value);
 182 }
 183
 184 static int hidp_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
 185 {
 186         struct hidp_session *session = input_get_drvdata(dev);
 187
 188         return hidp_queue_event(session, dev, type, code, value);
 189 }
 190
 191 static void hidp_input_report(struct hidp_session *session, struct sk_buff *skb)
 192 {
 193         struct input_dev *dev = session->input;
 194         unsigned char *keys = session->keys;
 195         unsigned char *udata = skb->data + 1;
 196         signed char *sdata = skb->data + 1;
 197         int i, size = skb->len - 1;
 198
 199         switch (skb->data[0]) {
 200         case 0x01:      /* Keyboard report */
 201                 for (i = 0; i < 8; i++)
 202                         input_report_key(dev, hidp_keycode[i + 224], (udata[0] >> i) & 1);
 203
 204                 /* If all the key codes have been set to 0x01, it means
 205                  * too many keys were pressed at the same time. */
 206                 if (!memcmp(udata + 2, hidp_mkeyspat, 6))
 207                         break;
 208
 209                 for (i = 2; i < 8; i++) {
 210                         if (keys[i] > 3 && memscan(udata + 2, keys[i], 6) == udata + 8) {
 211                                 if (hidp_keycode[keys[i]])
 212                                         input_report_key(dev, hidp_keycode[keys[i]], 0);
 213                                 else
 214                                         BT_ERR("Unknown key (scancode %#x) released.", keys[i]);
 215                         }
 216
 217                         if (udata[i] > 3 && memscan(keys + 2, udata[i], 6) == keys + 8) {
 218                                 if (hidp_keycode[udata[i]])
 219                                         input_report_key(dev, hidp_keycode[udata[i]], 1);
 220                                 else
 221                                         BT_ERR("Unknown key (scancode %#x) pressed.", udata[i]);
 222                         }
 223                 }
 224
 225                 memcpy(keys, udata, 8);
 226                 break;
 227
 228         case 0x02:      /* Mouse report */
 229                 input_report_key(dev, BTN_LEFT,   sdata[0] & 0x01);
 230                 input_report_key(dev, BTN_RIGHT,  sdata[0] & 0x02);
 231                 input_report_key(dev, BTN_MIDDLE, sdata[0] & 0x04);
 232                 input_report_key(dev, BTN_SIDE,   sdata[0] & 0x08);
 233                 input_report_key(dev, BTN_EXTRA,  sdata[0] & 0x10);
 234
 235                 input_report_rel(dev, REL_X, sdata[1]);
 236                 input_report_rel(dev, REL_Y, sdata[2]);
 237
 238                 if (size > 3)
 239                         input_report_rel(dev, REL_WHEEL, sdata[3]);
 240                 break;
 241         }
 242
 243         input_sync(dev);
 244 }
 245
 246 static int hidp_queue_report(struct hidp_session *session,
 247                                 unsigned char *data, int size)
 248 {
 249         struct sk_buff *skb;
 250
 251         BT_DBG("session %p hid %p data %p size %d", session, session->hid, data, size);
 252
 253         if (!(skb = alloc_skb(size + 1, GFP_ATOMIC))) {
 254                 BT_ERR("Can't allocate memory for new frame");
 255                 return -ENOMEM;
 256         }
 257
 258         *skb_put(skb, 1) = 0xa2;
 259         if (size > 0)
 260                 memcpy(skb_put(skb, size), data, size);
 261
 262         skb_queue_tail(&session->intr_transmit, skb);
 263
 264         hidp_schedule(session);
 265
 266         return 0;
 267 }
 268
 269 static int hidp_send_report(struct hidp_session *session, struct hid_report *report)
 270 {
 271         unsigned char buf[32];
 272         int rsize;
 273
 274         rsize = ((report->size - 1) >> 3) + 1 + (report->id > 0);
 275         if (rsize > sizeof(buf))
 276                 return -EIO;
 277
 278         hid_output_report(report, buf);
 279
 280         return hidp_queue_report(session, buf, rsize);
 281 }
 282
 283 static void hidp_idle_timeout(unsigned long arg)
 284 {
 285         struct hidp_session *session = (struct hidp_session *) arg;
 286
 287         atomic_inc(&session->terminate);
 288         hidp_schedule(session);
 289 }
 290
 291 static void hidp_set_timer(struct hidp_session *session)
 292 {
 293         if (session->idle_to > 0)
 294                 mod_timer(&session->timer, jiffies + HZ * session->idle_to);
 295 }
 296
 297 static inline void hidp_del_timer(struct hidp_session *session)
 298 {
 299         if (session->idle_to > 0)
 300                 del_timer(&session->timer);
 301 }
 302
 303 static int __hidp_send_ctrl_message(struct hidp_session *session,
 304                         unsigned char hdr, unsigned char *data, int size)
 305 {
 306         struct sk_buff *skb;
 307
 308         BT_DBG("session %p data %p size %d", session, data, size);
 309
 310         if (!(skb = alloc_skb(size + 1, GFP_ATOMIC))) {
 311                 BT_ERR("Can't allocate memory for new frame");
 312                 return -ENOMEM;
 313         }
 314
 315         *skb_put(skb, 1) = hdr;
 316         if (data && size > 0)
 317                 memcpy(skb_put(skb, size), data, size);
 318
 319         skb_queue_tail(&session->ctrl_transmit, skb);
 320
 321         return 0;
 322 }
 323
 324 static inline int hidp_send_ctrl_message(struct hidp_session *session,
 325                         unsigned char hdr, unsigned char *data, int size)
 326 {
 327         int err;
 328
 329         err = __hidp_send_ctrl_message(session, hdr, data, size);
 330
 331         hidp_schedule(session);
 332
 333         return err;
 334 }
 335
 336 static void hidp_process_handshake(struct hidp_session *session,
 337                                         unsigned char param)
 338 {
 339         BT_DBG("session %p param 0x%02x", session, param);
 340
 341         switch (param) {
 342         case HIDP_HSHK_SUCCESSFUL:
 343                 /* FIXME: Call into SET_ GET_ handlers here */
 344                 break;
 345
 346         case HIDP_HSHK_NOT_READY:
 347         case HIDP_HSHK_ERR_INVALID_REPORT_ID:
 348         case HIDP_HSHK_ERR_UNSUPPORTED_REQUEST:
 349         case HIDP_HSHK_ERR_INVALID_PARAMETER:
 350                 /* FIXME: Call into SET_ GET_ handlers here */
 351                 break;
 352
 353         case HIDP_HSHK_ERR_UNKNOWN:
 354                 break;
 355
 356         case HIDP_HSHK_ERR_FATAL:
 357                 /* Device requests a reboot, as this is the only way this error
 358                  * can be recovered. */
 359                 __hidp_send_ctrl_message(session,
 360                         HIDP_TRANS_HID_CONTROL | HIDP_CTRL_SOFT_RESET, NULL, 0);
 361                 break;
 362
 363         default:
 364                 __hidp_send_ctrl_message(session,
 365                         HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
 366                 break;
 367         }
 368 }
 369
 370 static void hidp_process_hid_control(struct hidp_session *session,
 371                                         unsigned char param)
 372 {
 373         BT_DBG("session %p param 0x%02x", session, param);
 374
 375         if (param == HIDP_CTRL_VIRTUAL_CABLE_UNPLUG) {
 376                 /* Flush the transmit queues */
 377                 skb_queue_purge(&session->ctrl_transmit);
 378                 skb_queue_purge(&session->intr_transmit);
 379
 380                 /* Kill session thread */
 381                 atomic_inc(&session->terminate);
 382         }
 383 }
 384
 385 static void hidp_process_data(struct hidp_session *session, struct sk_buff *skb,
 386                                 unsigned char param)
 387 {
 388         BT_DBG("session %p skb %p len %d param 0x%02x", session, skb, skb->len, param);
 389
 390         switch (param) {
 391         case HIDP_DATA_RTYPE_INPUT:
 392                 hidp_set_timer(session);
 393
 394                 if (session->input)
 395                         hidp_input_report(session, skb);
 396
 397                 if (session->hid)
 398                         hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 0);
 399
 400                 break;
 401
 402         case HIDP_DATA_RTYPE_OTHER:
 403         case HIDP_DATA_RTYPE_OUPUT:
 404         case HIDP_DATA_RTYPE_FEATURE:
 405                 break;
 406
 407         default:
 408                 __hidp_send_ctrl_message(session,
 409                         HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0);
 410         }
 411 }
 412
 413 static void hidp_recv_ctrl_frame(struct hidp_session *session,
 414                                         struct sk_buff *skb)
 415 {
 416         unsigned char hdr, type, param;
 417
 418         BT_DBG("session %p skb %p len %d", session, skb, skb->len);
 419
 420         hdr = skb->data[0];
 421         skb_pull(skb, 1);
 422
 423         type = hdr & HIDP_HEADER_TRANS_MASK;
 424         param = hdr & HIDP_HEADER_PARAM_MASK;
 425
 426         switch (type) {
 427         case HIDP_TRANS_HANDSHAKE:
 428                 hidp_process_handshake(session, param);
 429                 break;
 430
 431         case HIDP_TRANS_HID_CONTROL:
 432                 hidp_process_hid_control(session, param);
 433                 break;
 434
 435         case HIDP_TRANS_DATA:
 436                 hidp_process_data(session, skb, param);
 437                 break;
 438
 439         default:
 440                 __hidp_send_ctrl_message(session,
 441                         HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_UNSUPPORTED_REQUEST, NULL, 0);
 442                 break;
 443         }
 444
 445         kfree_skb(skb);
 446 }
 447
 448 static void hidp_recv_intr_frame(struct hidp_session *session,
 449                                 struct sk_buff *skb)
 450 {
 451         unsigned char hdr;
 452
 453         BT_DBG("session %p skb %p len %d", session, skb, skb->len);
 454
 455         hdr = skb->data[0];
 456         skb_pull(skb, 1);
 457
 458         if (hdr == (HIDP_TRANS_DATA | HIDP_DATA_RTYPE_INPUT)) {
 459                 hidp_set_timer(session);
 460
 461                 if (session->input)
 462                         hidp_input_report(session, skb);
 463
 464                 if (session->hid) {
 465                         hid_input_report(session->hid, HID_INPUT_REPORT, skb->data, skb->len, 1);
 466                         BT_DBG("report len %d", skb->len);
 467                 }
 468         } else {
 469                 BT_DBG("Unsupported protocol header 0x%02x", hdr);
 470         }
 471
 472         kfree_skb(skb);
 473 }
 474
 475 static int hidp_send_frame(struct socket *sock, unsigned char *data, int len)
 476 {
 477         struct kvec iv = { data, len };
 478         struct msghdr msg;
 479
 480         BT_DBG("sock %p data %p len %d", sock, data, len);
 481
 482         if (!len)
 483                 return 0;
 484
 485         memset(&msg, 0, sizeof(msg));
 486
 487         return kernel_sendmsg(sock, &msg, &iv, 1, len);
 488 }
 489
 490 static void hidp_process_transmit(struct hidp_session *session)
 491 {
 492         struct sk_buff *skb;
 493
 494         BT_DBG("session %p", session);
 495
 496         while ((skb = skb_dequeue(&session->ctrl_transmit))) {
 497                 if (hidp_send_frame(session->ctrl_sock, skb->data, skb->len) < 0) {
 498                         skb_queue_head(&session->ctrl_transmit, skb);
 499                         break;
 500                 }
 501
 502                 hidp_set_timer(session);
 503                 kfree_skb(skb);
 504         }
 505
 506         while ((skb = skb_dequeue(&session->intr_transmit))) {
 507                 if (hidp_send_frame(session->intr_sock, skb->data, skb->len) < 0) {
 508                         skb_queue_head(&session->intr_transmit, skb);
 509                         break;
 510                 }
 511
 512                 hidp_set_timer(session);
 513                 kfree_skb(skb);
 514         }
 515 }
 516
 517 static int hidp_session(void *arg)
 518 {
 519         struct hidp_session *session = arg;
 520         struct sock *ctrl_sk = session->ctrl_sock->sk;
 521         struct sock *intr_sk = session->intr_sock->sk;
 522         struct sk_buff *skb;
 523         int vendor = 0x0000, product = 0x0000;
 524         wait_queue_t ctrl_wait, intr_wait;
 525
 526         BT_DBG("session %p", session);
 527
 528         if (session->input) {
 529                 vendor  = session->input->id.vendor;
 530                 product = session->input->id.product;
 531         }
 532
 533         if (session->hid) {
 534                 vendor  = session->hid->vendor;
 535                 product = session->hid->product;
 536         }
 537
 538         daemonize("khidpd_%04x%04x", vendor, product);
 539         set_user_nice(current, -15);
 540
 541         init_waitqueue_entry(&ctrl_wait, current);
 542         init_waitqueue_entry(&intr_wait, current);
 543         add_wait_queue(ctrl_sk->sk_sleep, &ctrl_wait);
 544         add_wait_queue(intr_sk->sk_sleep, &intr_wait);
 545         while (!atomic_read(&session->terminate)) {
 546                 set_current_state(TASK_INTERRUPTIBLE);
 547
 548                 if (ctrl_sk->sk_state != BT_CONNECTED || intr_sk->sk_state != BT_CONNECTED)
 549                         break;
 550
 551                 while ((skb = skb_dequeue(&ctrl_sk->sk_receive_queue))) {
 552                         skb_orphan(skb);
 553                         hidp_recv_ctrl_frame(session, skb);
 554                 }
 555
 556                 while ((skb = skb_dequeue(&intr_sk->sk_receive_queue))) {
 557                         skb_orphan(skb);
 558                         hidp_recv_intr_frame(session, skb);
 559                 }
 560
 561                 hidp_process_transmit(session);
 562
 563                 schedule();
 564         }
 565         set_current_state(TASK_RUNNING);
 566         remove_wait_queue(intr_sk->sk_sleep, &intr_wait);
 567         remove_wait_queue(ctrl_sk->sk_sleep, &ctrl_wait);
 568
 569         down_write(&hidp_session_sem);
 570
 571         hidp_del_timer(session);
 572
 573         if (session->input) {
 574                 input_unregister_device(session->input);
 575                 session->input = NULL;
 576         }
 577
 578         if (session->hid) {
 579                 if (session->hid->claimed & HID_CLAIMED_INPUT)
 580                         hidinput_disconnect(session->hid);
 581                 hid_free_device(session->hid);
 582         }
 583
 584         /* Wakeup user-space polling for socket errors */
 585         session->intr_sock->sk->sk_err = EUNATCH;
 586         session->ctrl_sock->sk->sk_err = EUNATCH;
 587
 588         hidp_schedule(session);
 589
 590         fput(session->intr_sock->file);
 591
 592         wait_event_timeout(*(ctrl_sk->sk_sleep),
 593                 (ctrl_sk->sk_state == BT_CLOSED), msecs_to_jiffies(500));
 594
 595         fput(session->ctrl_sock->file);
 596
 597         __hidp_unlink_session(session);
 598
 599         up_write(&hidp_session_sem);
 600
 601         kfree(session);
 602         return 0;
 603 }
 604
 605 static struct device *hidp_get_device(struct hidp_session *session)
 606 {
 607         bdaddr_t *src = &bt_sk(session->ctrl_sock->sk)->src;
 608         bdaddr_t *dst = &bt_sk(session->ctrl_sock->sk)->dst;
 609         struct hci_dev *hdev;
 610         struct hci_conn *conn;
 611
 612         hdev = hci_get_route(dst, src);
 613         if (!hdev)
 614                 return NULL;
 615
 616         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
 617
 618         hci_dev_put(hdev);
 619
 620         return conn ? &conn->dev : NULL;
 621 }
 622
 623 static int hidp_setup_input(struct hidp_session *session,
 624                                 struct hidp_connadd_req *req)
 625 {
 626         struct input_dev *input = session->input;
 627         int i;
 628
 629         input_set_drvdata(input, session);
 630
 631         input->name = "Bluetooth HID Boot Protocol Device";
 632
 633         input->id.bustype = BUS_BLUETOOTH;
 634         input->id.vendor  = req->vendor;
 635         input->id.product = req->product;
 636         input->id.version = req->version;
 637
 638         if (req->subclass & 0x40) {
 639                 set_bit(EV_KEY, input->evbit);
 640                 set_bit(EV_LED, input->evbit);
 641                 set_bit(EV_REP, input->evbit);
 642
 643                 set_bit(LED_NUML,    input->ledbit);
 644                 set_bit(LED_CAPSL,   input->ledbit);
 645                 set_bit(LED_SCROLLL, input->ledbit);
 646                 set_bit(LED_COMPOSE, input->ledbit);
 647                 set_bit(LED_KANA,    input->ledbit);
 648
 649                 for (i = 0; i < sizeof(hidp_keycode); i++)
 650                         set_bit(hidp_keycode[i], input->keybit);
 651                 clear_bit(0, input->keybit);
 652         }
 653
 654         if (req->subclass & 0x80) {
 655                 input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 656                 input->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
 657                         BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
 658                 input->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 659                 input->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) |
 660                         BIT_MASK(BTN_EXTRA);
 661                 input->relbit[0] |= BIT_MASK(REL_WHEEL);
 662         }
 663
 664         input->dev.parent = hidp_get_device(session);
 665
 666         input->event = hidp_input_event;
 667
 668         return input_register_device(input);
 669 }
 670
 671 static int hidp_open(struct hid_device *hid)
 672 {
 673         return 0;
 674 }
 675
 676 static void hidp_close(struct hid_device *hid)
 677 {
 678 }
 679
 680 static const struct {
 681         __u16 idVendor;
 682         __u16 idProduct;
 683         unsigned quirks;
 684 } hidp_blacklist[] = {
 685         /* Apple wireless Mighty Mouse */
 686         { 0x05ac, 0x030c, HID_QUIRK_MIGHTYMOUSE | HID_QUIRK_INVERT_HWHEEL },
 687
 688         { }     /* Terminating entry */
 689 };
 690
 691 static void hidp_setup_quirks(struct hid_device *hid)
 692 {
 693         unsigned int n;
 694
 695         for (n = 0; hidp_blacklist[n].idVendor; n++)
 696                 if (hidp_blacklist[n].idVendor == le16_to_cpu(hid->vendor) &&
 697                                 hidp_blacklist[n].idProduct == le16_to_cpu(hid->product))
 698                         hid->quirks = hidp_blacklist[n].quirks;
 699 }
 700
 701 static void hidp_setup_hid(struct hidp_session *session,
 702                                 struct hidp_connadd_req *req)
 703 {
 704         struct hid_device *hid = session->hid;
 705         struct hid_report *report;
 706         bdaddr_t src, dst;
 707
 708         baswap(&src, &bt_sk(session->ctrl_sock->sk)->src);
 709         baswap(&dst, &bt_sk(session->ctrl_sock->sk)->dst);
 710
 711         hid->driver_data = session;
 712
 713         hid->country = req->country;
 714
 715         hid->bus     = BUS_BLUETOOTH;
 716         hid->vendor  = req->vendor;
 717         hid->product = req->product;
 718         hid->version = req->version;
 719
 720         strncpy(hid->name, req->name, 128);
 721         strncpy(hid->phys, batostr(&src), 64);
 722         strncpy(hid->uniq, batostr(&dst), 64);
 723
 724         hid->dev = hidp_get_device(session);
 725
 726         hid->hid_open  = hidp_open;
 727         hid->hid_close = hidp_close;
 728
 729         hid->hidinput_input_event = hidp_hidinput_event;
 730
 731         hidp_setup_quirks(hid);
 732
 733         list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
 734                 hidp_send_report(session, report);
 735
 736         list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
 737                 hidp_send_report(session, report);
 738
 739         if (hidinput_connect(hid) == 0)
 740                 hid->claimed |= HID_CLAIMED_INPUT;
 741 }
 742
 743 int hidp_add_connection(struct hidp_connadd_req *req, struct socket *ctrl_sock, struct socket *intr_sock)
 744 {
 745         struct hidp_session *session, *s;
 746         int err;
 747
 748         BT_DBG("");
 749
 750         if (bacmp(&bt_sk(ctrl_sock->sk)->src, &bt_sk(intr_sock->sk)->src) ||
 751                         bacmp(&bt_sk(ctrl_sock->sk)->dst, &bt_sk(intr_sock->sk)->dst))
 752                 return -ENOTUNIQ;
 753
 754         session = kzalloc(sizeof(struct hidp_session), GFP_KERNEL);
 755         if (!session)
 756                 return -ENOMEM;
 757
 758         BT_DBG("rd_data %p rd_size %d", req->rd_data, req->rd_size);
 759
 760         if (req->rd_size > 0) {
 761                 unsigned char *buf = kmalloc(req->rd_size, GFP_KERNEL);
 762
 763                 if (!buf) {
 764                         kfree(session);
 765                         return -ENOMEM;
 766                 }
 767
 768                 if (copy_from_user(buf, req->rd_data, req->rd_size)) {
 769                         kfree(buf);
 770                         kfree(session);
 771                         return -EFAULT;
 772                 }
 773
 774                 session->hid = hid_parse_report(buf, req->rd_size);
 775
 776                 kfree(buf);
 777
 778                 if (!session->hid) {
 779                         kfree(session);
 780                         return -EINVAL;
 781                 }
 782         }
 783
 784         if (!session->hid) {
 785                 session->input = input_allocate_device();
 786                 if (!session->input) {
 787                         kfree(session);
 788                         return -ENOMEM;
 789                 }
 790         }
 791
 792         down_write(&hidp_session_sem);
 793
 794         s = __hidp_get_session(&bt_sk(ctrl_sock->sk)->dst);
 795         if (s && s->state == BT_CONNECTED) {
 796                 err = -EEXIST;
 797                 goto failed;
 798         }
 799
 800         bacpy(&session->bdaddr, &bt_sk(ctrl_sock->sk)->dst);
 801
 802         session->ctrl_mtu = min_t(uint, l2cap_pi(ctrl_sock->sk)->omtu, l2cap_pi(ctrl_sock->sk)->imtu);
 803         session->intr_mtu = min_t(uint, l2cap_pi(intr_sock->sk)->omtu, l2cap_pi(intr_sock->sk)->imtu);
 804
 805         BT_DBG("ctrl mtu %d intr mtu %d", session->ctrl_mtu, session->intr_mtu);
 806
 807         session->ctrl_sock = ctrl_sock;
 808         session->intr_sock = intr_sock;
 809         session->state     = BT_CONNECTED;
 810
 811         setup_timer(&session->timer, hidp_idle_timeout, (unsigned long)session);
 812
 813         skb_queue_head_init(&session->ctrl_transmit);
 814         skb_queue_head_init(&session->intr_transmit);
 815
 816         session->flags   = req->flags & (1 << HIDP_BLUETOOTH_VENDOR_ID);
 817         session->idle_to = req->idle_to;
 818
 819         if (session->input) {
 820                 err = hidp_setup_input(session, req);
 821                 if (err < 0)
 822                         goto failed;
 823         }
 824
 825         if (session->hid)
 826                 hidp_setup_hid(session, req);
 827
 828         __hidp_link_session(session);
 829
 830         hidp_set_timer(session);
 831
 832         err = kernel_thread(hidp_session, session, CLONE_KERNEL);
 833         if (err < 0)
 834                 goto unlink;
 835
 836         if (session->input) {
 837                 hidp_send_ctrl_message(session,
 838                         HIDP_TRANS_SET_PROTOCOL | HIDP_PROTO_BOOT, NULL, 0);
 839                 session->flags |= (1 << HIDP_BOOT_PROTOCOL_MODE);
 840
 841                 session->leds = 0xff;
 842                 hidp_input_event(session->input, EV_LED, 0, 0);
 843         }
 844
 845         up_write(&hidp_session_sem);
 846         return 0;
 847
 848 unlink:
 849         hidp_del_timer(session);
 850
 851         __hidp_unlink_session(session);
 852
 853         if (session->input) {
 854                 input_unregister_device(session->input);
 855                 session->input = NULL; /* don't try to free it here */
 856         }
 857
 858 failed:
 859         up_write(&hidp_session_sem);
 860
 861         if (session->hid)
 862                 hid_free_device(session->hid);
 863
 864         input_free_device(session->input);
 865         kfree(session);
 866         return err;
 867 }
 868
 869 int hidp_del_connection(struct hidp_conndel_req *req)
 870 {
 871         struct hidp_session *session;
 872         int err = 0;
 873
 874         BT_DBG("");
 875
 876         down_read(&hidp_session_sem);
 877
 878         session = __hidp_get_session(&req->bdaddr);
 879         if (session) {
 880                 if (req->flags & (1 << HIDP_VIRTUAL_CABLE_UNPLUG)) {
 881                         hidp_send_ctrl_message(session,
 882                                 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_VIRTUAL_CABLE_UNPLUG, NULL, 0);
 883                 } else {
 884                         /* Flush the transmit queues */
 885                         skb_queue_purge(&session->ctrl_transmit);
 886                         skb_queue_purge(&session->intr_transmit);
 887
 888                         /* Wakeup user-space polling for socket errors */
 889                         session->intr_sock->sk->sk_err = EUNATCH;
 890                         session->ctrl_sock->sk->sk_err = EUNATCH;
 891
 892                         /* Kill session thread */
 893                         atomic_inc(&session->terminate);
 894                         hidp_schedule(session);
 895                 }
 896         } else
 897                 err = -ENOENT;
 898
 899         up_read(&hidp_session_sem);
 900         return err;
 901 }
 902
 903 int hidp_get_connlist(struct hidp_connlist_req *req)
 904 {
 905         struct list_head *p;
 906         int err = 0, n = 0;
 907
 908         BT_DBG("");
 909
 910         down_read(&hidp_session_sem);
 911
 912         list_for_each(p, &hidp_session_list) {
 913                 struct hidp_session *session;
 914                 struct hidp_conninfo ci;
 915
 916                 session = list_entry(p, struct hidp_session, list);
 917
 918                 __hidp_copy_session(session, &ci);
 919
 920                 if (copy_to_user(req->ci, &ci, sizeof(ci))) {
 921                         err = -EFAULT;
 922                         break;
 923                 }
 924
 925                 if (++n >= req->cnum)
 926                         break;
 927
 928                 req->ci++;
 929         }
 930         req->cnum = n;
 931
 932         up_read(&hidp_session_sem);
 933         return err;
 934 }
 935
 936 int hidp_get_conninfo(struct hidp_conninfo *ci)
 937 {
 938         struct hidp_session *session;
 939         int err = 0;
 940
 941         down_read(&hidp_session_sem);
 942
 943         session = __hidp_get_session(&ci->bdaddr);
 944         if (session)
 945                 __hidp_copy_session(session, ci);
 946         else
 947                 err = -ENOENT;
 948
 949         up_read(&hidp_session_sem);
 950         return err;
 951 }
 952
 953 static int __init hidp_init(void)
 954 {
 955         l2cap_load();
 956
 957         BT_INFO("HIDP (Human Interface Emulation) ver %s", VERSION);
 958
 959         return hidp_init_sockets();
 960 }
 961
 962 static void __exit hidp_exit(void)
 963 {
 964         hidp_cleanup_sockets();
 965 }
 966
 967 module_init(hidp_init);
 968 module_exit(hidp_exit);
 969
 970 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 971 MODULE_DESCRIPTION("Bluetooth HIDP ver " VERSION);
 972 MODULE_VERSION(VERSION);
 973 MODULE_LICENSE("GPL");
 974 MODULE_ALIAS("bt-proto-6");