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         fput(session->intr_sock->file);
 585
 586         wait_event_timeout(*(ctrl_sk->sk_sleep),
 587                 (ctrl_sk->sk_state == BT_CLOSED), msecs_to_jiffies(500));
 588
 589         fput(session->ctrl_sock->file);
 590
 591         __hidp_unlink_session(session);
 592
 593         up_write(&hidp_session_sem);
 594
 595         kfree(session);
 596         return 0;
 597 }
 598
 599 static struct device *hidp_get_device(struct hidp_session *session)
 600 {
 601         bdaddr_t *src = &bt_sk(session->ctrl_sock->sk)->src;
 602         bdaddr_t *dst = &bt_sk(session->ctrl_sock->sk)->dst;
 603         struct hci_dev *hdev;
 604         struct hci_conn *conn;
 605
 606         hdev = hci_get_route(dst, src);
 607         if (!hdev)
 608                 return NULL;
 609
 610         conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
 611
 612         hci_dev_put(hdev);
 613
 614         return conn ? &conn->dev : NULL;
 615 }
 616
 617 static int hidp_setup_input(struct hidp_session *session,
 618                                 struct hidp_connadd_req *req)
 619 {
 620         struct input_dev *input = session->input;
 621         int i;
 622
 623         input_set_drvdata(input, session);
 624
 625         input->name = "Bluetooth HID Boot Protocol Device";
 626
 627         input->id.bustype = BUS_BLUETOOTH;
 628         input->id.vendor  = req->vendor;
 629         input->id.product = req->product;
 630         input->id.version = req->version;
 631
 632         if (req->subclass & 0x40) {
 633                 set_bit(EV_KEY, input->evbit);
 634                 set_bit(EV_LED, input->evbit);
 635                 set_bit(EV_REP, input->evbit);
 636
 637                 set_bit(LED_NUML,    input->ledbit);
 638                 set_bit(LED_CAPSL,   input->ledbit);
 639                 set_bit(LED_SCROLLL, input->ledbit);
 640                 set_bit(LED_COMPOSE, input->ledbit);
 641                 set_bit(LED_KANA,    input->ledbit);
 642
 643                 for (i = 0; i < sizeof(hidp_keycode); i++)
 644                         set_bit(hidp_keycode[i], input->keybit);
 645                 clear_bit(0, input->keybit);
 646         }
 647
 648         if (req->subclass & 0x80) {
 649                 input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 650                 input->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
 651                         BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
 652                 input->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 653                 input->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) |
 654                         BIT_MASK(BTN_EXTRA);
 655                 input->relbit[0] |= BIT_MASK(REL_WHEEL);
 656         }
 657
 658         input->dev.parent = hidp_get_device(session);
 659
 660         input->event = hidp_input_event;
 661
 662         return input_register_device(input);
 663 }
 664
 665 static int hidp_open(struct hid_device *hid)
 666 {
 667         return 0;
 668 }
 669
 670 static void hidp_close(struct hid_device *hid)
 671 {
 672 }
 673
 674 static const struct {
 675         __u16 idVendor;
 676         __u16 idProduct;
 677         unsigned quirks;
 678 } hidp_blacklist[] = {
 679         /* Apple wireless Mighty Mouse */
 680         { 0x05ac, 0x030c, HID_QUIRK_MIGHTYMOUSE | HID_QUIRK_INVERT_HWHEEL },
 681
 682         { }     /* Terminating entry */
 683 };
 684
 685 static void hidp_setup_quirks(struct hid_device *hid)
 686 {
 687         unsigned int n;
 688
 689         for (n = 0; hidp_blacklist[n].idVendor; n++)
 690                 if (hidp_blacklist[n].idVendor == le16_to_cpu(hid->vendor) &&
 691                                 hidp_blacklist[n].idProduct == le16_to_cpu(hid->product))
 692                         hid->quirks = hidp_blacklist[n].quirks;
 693 }
 694
 695 static void hidp_setup_hid(struct hidp_session *session,
 696                                 struct hidp_connadd_req *req)
 697 {
 698         struct hid_device *hid = session->hid;
 699         struct hid_report *report;
 700         bdaddr_t src, dst;
 701
 702         baswap(&src, &bt_sk(session->ctrl_sock->sk)->src);
 703         baswap(&dst, &bt_sk(session->ctrl_sock->sk)->dst);
 704
 705         hid->driver_data = session;
 706
 707         hid->country = req->country;
 708
 709         hid->bus     = BUS_BLUETOOTH;
 710         hid->vendor  = req->vendor;
 711         hid->product = req->product;
 712         hid->version = req->version;
 713
 714         strncpy(hid->name, req->name, 128);
 715         strncpy(hid->phys, batostr(&src), 64);
 716         strncpy(hid->uniq, batostr(&dst), 64);
 717
 718         hid->dev = hidp_get_device(session);
 719
 720         hid->hid_open  = hidp_open;
 721         hid->hid_close = hidp_close;
 722
 723         hid->hidinput_input_event = hidp_hidinput_event;
 724
 725         hidp_setup_quirks(hid);
 726
 727         list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
 728                 hidp_send_report(session, report);
 729
 730         list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
 731                 hidp_send_report(session, report);
 732
 733         if (hidinput_connect(hid) == 0)
 734                 hid->claimed |= HID_CLAIMED_INPUT;
 735 }
 736
 737 int hidp_add_connection(struct hidp_connadd_req *req, struct socket *ctrl_sock, struct socket *intr_sock)
 738 {
 739         struct hidp_session *session, *s;
 740         int err;
 741
 742         BT_DBG("");
 743
 744         if (bacmp(&bt_sk(ctrl_sock->sk)->src, &bt_sk(intr_sock->sk)->src) ||
 745                         bacmp(&bt_sk(ctrl_sock->sk)->dst, &bt_sk(intr_sock->sk)->dst))
 746                 return -ENOTUNIQ;
 747
 748         session = kzalloc(sizeof(struct hidp_session), GFP_KERNEL);
 749         if (!session)
 750                 return -ENOMEM;
 751
 752         BT_DBG("rd_data %p rd_size %d", req->rd_data, req->rd_size);
 753
 754         if (req->rd_size > 0) {
 755                 unsigned char *buf = kmalloc(req->rd_size, GFP_KERNEL);
 756
 757                 if (!buf) {
 758                         kfree(session);
 759                         return -ENOMEM;
 760                 }
 761
 762                 if (copy_from_user(buf, req->rd_data, req->rd_size)) {
 763                         kfree(buf);
 764                         kfree(session);
 765                         return -EFAULT;
 766                 }
 767
 768                 session->hid = hid_parse_report(buf, req->rd_size);
 769
 770                 kfree(buf);
 771
 772                 if (!session->hid) {
 773                         kfree(session);
 774                         return -EINVAL;
 775                 }
 776         }
 777
 778         if (!session->hid) {
 779                 session->input = input_allocate_device();
 780                 if (!session->input) {
 781                         kfree(session);
 782                         return -ENOMEM;
 783                 }
 784         }
 785
 786         down_write(&hidp_session_sem);
 787
 788         s = __hidp_get_session(&bt_sk(ctrl_sock->sk)->dst);
 789         if (s && s->state == BT_CONNECTED) {
 790                 err = -EEXIST;
 791                 goto failed;
 792         }
 793
 794         bacpy(&session->bdaddr, &bt_sk(ctrl_sock->sk)->dst);
 795
 796         session->ctrl_mtu = min_t(uint, l2cap_pi(ctrl_sock->sk)->omtu, l2cap_pi(ctrl_sock->sk)->imtu);
 797         session->intr_mtu = min_t(uint, l2cap_pi(intr_sock->sk)->omtu, l2cap_pi(intr_sock->sk)->imtu);
 798
 799         BT_DBG("ctrl mtu %d intr mtu %d", session->ctrl_mtu, session->intr_mtu);
 800
 801         session->ctrl_sock = ctrl_sock;
 802         session->intr_sock = intr_sock;
 803         session->state     = BT_CONNECTED;
 804
 805         setup_timer(&session->timer, hidp_idle_timeout, (unsigned long)session);
 806
 807         skb_queue_head_init(&session->ctrl_transmit);
 808         skb_queue_head_init(&session->intr_transmit);
 809
 810         session->flags   = req->flags & (1 << HIDP_BLUETOOTH_VENDOR_ID);
 811         session->idle_to = req->idle_to;
 812
 813         if (session->input) {
 814                 err = hidp_setup_input(session, req);
 815                 if (err < 0)
 816                         goto failed;
 817         }
 818
 819         if (session->hid)
 820                 hidp_setup_hid(session, req);
 821
 822         __hidp_link_session(session);
 823
 824         hidp_set_timer(session);
 825
 826         err = kernel_thread(hidp_session, session, CLONE_KERNEL);
 827         if (err < 0)
 828                 goto unlink;
 829
 830         if (session->input) {
 831                 hidp_send_ctrl_message(session,
 832                         HIDP_TRANS_SET_PROTOCOL | HIDP_PROTO_BOOT, NULL, 0);
 833                 session->flags |= (1 << HIDP_BOOT_PROTOCOL_MODE);
 834
 835                 session->leds = 0xff;
 836                 hidp_input_event(session->input, EV_LED, 0, 0);
 837         }
 838
 839         up_write(&hidp_session_sem);
 840         return 0;
 841
 842 unlink:
 843         hidp_del_timer(session);
 844
 845         __hidp_unlink_session(session);
 846
 847         if (session->input) {
 848                 input_unregister_device(session->input);
 849                 session->input = NULL; /* don't try to free it here */
 850         }
 851
 852 failed:
 853         up_write(&hidp_session_sem);
 854
 855         if (session->hid)
 856                 hid_free_device(session->hid);
 857
 858         input_free_device(session->input);
 859         kfree(session);
 860         return err;
 861 }
 862
 863 int hidp_del_connection(struct hidp_conndel_req *req)
 864 {
 865         struct hidp_session *session;
 866         int err = 0;
 867
 868         BT_DBG("");
 869
 870         down_read(&hidp_session_sem);
 871
 872         session = __hidp_get_session(&req->bdaddr);
 873         if (session) {
 874                 if (req->flags & (1 << HIDP_VIRTUAL_CABLE_UNPLUG)) {
 875                         hidp_send_ctrl_message(session,
 876                                 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_VIRTUAL_CABLE_UNPLUG, NULL, 0);
 877                 } else {
 878                         /* Flush the transmit queues */
 879                         skb_queue_purge(&session->ctrl_transmit);
 880                         skb_queue_purge(&session->intr_transmit);
 881
 882                         /* Kill session thread */
 883                         atomic_inc(&session->terminate);
 884                         hidp_schedule(session);
 885                 }
 886         } else
 887                 err = -ENOENT;
 888
 889         up_read(&hidp_session_sem);
 890         return err;
 891 }
 892
 893 int hidp_get_connlist(struct hidp_connlist_req *req)
 894 {
 895         struct list_head *p;
 896         int err = 0, n = 0;
 897
 898         BT_DBG("");
 899
 900         down_read(&hidp_session_sem);
 901
 902         list_for_each(p, &hidp_session_list) {
 903                 struct hidp_session *session;
 904                 struct hidp_conninfo ci;
 905
 906                 session = list_entry(p, struct hidp_session, list);
 907
 908                 __hidp_copy_session(session, &ci);
 909
 910                 if (copy_to_user(req->ci, &ci, sizeof(ci))) {
 911                         err = -EFAULT;
 912                         break;
 913                 }
 914
 915                 if (++n >= req->cnum)
 916                         break;
 917
 918                 req->ci++;
 919         }
 920         req->cnum = n;
 921
 922         up_read(&hidp_session_sem);
 923         return err;
 924 }
 925
 926 int hidp_get_conninfo(struct hidp_conninfo *ci)
 927 {
 928         struct hidp_session *session;
 929         int err = 0;
 930
 931         down_read(&hidp_session_sem);
 932
 933         session = __hidp_get_session(&ci->bdaddr);
 934         if (session)
 935                 __hidp_copy_session(session, ci);
 936         else
 937                 err = -ENOENT;
 938
 939         up_read(&hidp_session_sem);
 940         return err;
 941 }
 942
 943 static int __init hidp_init(void)
 944 {
 945         l2cap_load();
 946
 947         BT_INFO("HIDP (Human Interface Emulation) ver %s", VERSION);
 948
 949         return hidp_init_sockets();
 950 }
 951
 952 static void __exit hidp_exit(void)
 953 {
 954         hidp_cleanup_sockets();
 955 }
 956
 957 module_init(hidp_init);
 958 module_exit(hidp_exit);
 959
 960 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 961 MODULE_DESCRIPTION("Bluetooth HIDP ver " VERSION);
 962 MODULE_VERSION(VERSION);
 963 MODULE_LICENSE("GPL");
 964 MODULE_ALIAS("bt-proto-6");