1 /****************************************************************************** 2 * 3 * Copyright (C) 2009-2012 Broadcom Corporation 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ******************************************************************************/ 18 19 //#if (defined(BTA_HH_INCLUDED) && (BTA_HH_INCLUDED == TRUE)) 20 21 #include <ctype.h> 22 #include <fcntl.h> 23 #include <sys/poll.h> 24 #include <pthread.h> 25 #include <stdio.h> 26 #include <string.h> 27 #include <stdint.h> 28 #include <errno.h> 29 #include <unistd.h> 30 #include <linux/uhid.h> 31 #include <unistd.h> 32 #include "btif_hh.h" 33 #include "bta_api.h" 34 #include "bta_hh_api.h" 35 #include "btif_util.h" 36 #include "bta_hh_co.h" 37 38 const char *dev_path = "/dev/uhid"; 39 40 #if (BLE_INCLUDED == TRUE && BTA_HH_LE_INCLUDED == TRUE) 41 #include "btif_config.h" 42 #define BTA_HH_NV_LOAD_MAX 16 43 static tBTA_HH_RPT_CACHE_ENTRY sReportCache[BTA_HH_NV_LOAD_MAX]; 44 #endif 45 46 /*Internal function to perform UHID write and error checking*/ 47 static int uhid_write(int fd, const struct uhid_event *ev) 48 { 49 ssize_t ret; 50 ret = write(fd, ev, sizeof(*ev)); 51 if (ret < 0){ 52 int rtn = -errno; 53 APPL_TRACE_ERROR("%s: Cannot write to uhid:%s", 54 __FUNCTION__, strerror(errno)); 55 return rtn; 56 } else if (ret != (ssize_t)sizeof(*ev)) { 57 APPL_TRACE_ERROR("%s: Wrong size written to uhid: %zd != %zu", 58 __FUNCTION__, ret, sizeof(*ev)); 59 return -EFAULT; 60 } else { 61 return 0; 62 } 63 } 64 65 /* Internal function to parse the events received from UHID driver*/ 66 static int uhid_event(btif_hh_device_t *p_dev) 67 { 68 struct uhid_event ev; 69 ssize_t ret; 70 memset(&ev, 0, sizeof(ev)); 71 if(!p_dev) 72 { 73 APPL_TRACE_ERROR("%s: Device not found",__FUNCTION__) 74 return -1; 75 } 76 ret = read(p_dev->fd, &ev, sizeof(ev)); 77 if (ret == 0) { 78 APPL_TRACE_ERROR("%s: Read HUP on uhid-cdev %s", __FUNCTION__, 79 strerror(errno)); 80 return -EFAULT; 81 } else if (ret < 0) { 82 APPL_TRACE_ERROR("%s: Cannot read uhid-cdev: %s", __FUNCTION__, 83 strerror(errno)); 84 return -errno; 85 } else if (ret < (ssize_t)sizeof(ev.type)) { 86 APPL_TRACE_ERROR("%s: Invalid size read from uhid-dev: %zd < %zu", 87 __FUNCTION__, ret, sizeof(ev.type)); 88 return -EFAULT; 89 } 90 91 switch (ev.type) { 92 case UHID_START: 93 APPL_TRACE_DEBUG("UHID_START from uhid-dev\n"); 94 break; 95 case UHID_STOP: 96 APPL_TRACE_DEBUG("UHID_STOP from uhid-dev\n"); 97 break; 98 case UHID_OPEN: 99 APPL_TRACE_DEBUG("UHID_OPEN from uhid-dev\n"); 100 break; 101 case UHID_CLOSE: 102 APPL_TRACE_DEBUG("UHID_CLOSE from uhid-dev\n"); 103 break; 104 case UHID_OUTPUT: 105 if (ret < (ssize_t)(sizeof(ev.type) + sizeof(ev.u.output))) { 106 APPL_TRACE_ERROR("%s: Invalid size read from uhid-dev: %zd < %zu", 107 __FUNCTION__, ret, 108 sizeof(ev.type) + sizeof(ev.u.output)); 109 return -EFAULT; 110 } 111 112 APPL_TRACE_DEBUG("UHID_OUTPUT: Report type = %d, report_size = %d" 113 ,ev.u.output.rtype, ev.u.output.size); 114 //Send SET_REPORT with feature report if the report type in output event is FEATURE 115 if(ev.u.output.rtype == UHID_FEATURE_REPORT) 116 btif_hh_setreport(p_dev, BTHH_FEATURE_REPORT, 117 ev.u.output.size, ev.u.output.data); 118 else if(ev.u.output.rtype == UHID_OUTPUT_REPORT) 119 btif_hh_setreport(p_dev, BTHH_OUTPUT_REPORT, 120 ev.u.output.size, ev.u.output.data); 121 else 122 btif_hh_setreport(p_dev, BTHH_INPUT_REPORT, 123 ev.u.output.size, ev.u.output.data); 124 break; 125 case UHID_OUTPUT_EV: 126 APPL_TRACE_DEBUG("UHID_OUTPUT_EV from uhid-dev\n"); 127 break; 128 case UHID_FEATURE: 129 APPL_TRACE_DEBUG("UHID_FEATURE from uhid-dev\n"); 130 break; 131 case UHID_FEATURE_ANSWER: 132 APPL_TRACE_DEBUG("UHID_FEATURE_ANSWER from uhid-dev\n"); 133 break; 134 135 default: 136 APPL_TRACE_DEBUG("Invalid event from uhid-dev: %u\n", ev.type); 137 } 138 139 return 0; 140 } 141 142 /******************************************************************************* 143 ** 144 ** Function create_thread 145 ** 146 ** Description creat a select loop 147 ** 148 ** Returns pthread_t 149 ** 150 *******************************************************************************/ 151 static inline pthread_t create_thread(void *(*start_routine)(void *), void * arg){ 152 APPL_TRACE_DEBUG("create_thread: entered"); 153 pthread_attr_t thread_attr; 154 155 pthread_attr_init(&thread_attr); 156 pthread_attr_setdetachstate(&thread_attr, PTHREAD_CREATE_JOINABLE); 157 pthread_t thread_id = -1; 158 if ( pthread_create(&thread_id, &thread_attr, start_routine, arg)!=0 ) 159 { 160 APPL_TRACE_ERROR("pthread_create : %s", strerror(errno)); 161 return -1; 162 } 163 APPL_TRACE_DEBUG("create_thread: thread created successfully"); 164 return thread_id; 165 } 166 167 /******************************************************************************* 168 ** 169 ** Function btif_hh_poll_event_thread 170 ** 171 ** Description the polling thread which polls for event from UHID driver 172 ** 173 ** Returns void 174 ** 175 *******************************************************************************/ 176 static void *btif_hh_poll_event_thread(void *arg) 177 { 178 179 btif_hh_device_t *p_dev = arg; 180 APPL_TRACE_DEBUG("%s: Thread created fd = %d", __FUNCTION__, p_dev->fd); 181 struct pollfd pfds[1]; 182 int ret; 183 pfds[0].fd = p_dev->fd; 184 pfds[0].events = POLLIN; 185 186 while(p_dev->hh_keep_polling){ 187 ret = poll(pfds, 1, 50); 188 if (ret < 0) { 189 APPL_TRACE_ERROR("%s: Cannot poll for fds: %s\n", __FUNCTION__, strerror(errno)); 190 break; 191 } 192 if (pfds[0].revents & POLLIN) { 193 APPL_TRACE_DEBUG("btif_hh_poll_event_thread: POLLIN"); 194 ret = uhid_event(p_dev); 195 if (ret){ 196 break; 197 } 198 } 199 } 200 201 p_dev->hh_poll_thread_id = -1; 202 return 0; 203 } 204 205 static inline void btif_hh_close_poll_thread(btif_hh_device_t *p_dev) 206 { 207 APPL_TRACE_DEBUG("%s", __FUNCTION__); 208 p_dev->hh_keep_polling = 0; 209 if(p_dev->hh_poll_thread_id > 0) 210 pthread_join(p_dev->hh_poll_thread_id,NULL); 211 212 return; 213 } 214 215 void bta_hh_co_destroy(int fd) 216 { 217 struct uhid_event ev; 218 memset(&ev, 0, sizeof(ev)); 219 ev.type = UHID_DESTROY; 220 uhid_write(fd, &ev); 221 APPL_TRACE_DEBUG("%s: Closing fd=%d", __func__, fd); 222 close(fd); 223 } 224 225 int bta_hh_co_write(int fd, UINT8* rpt, UINT16 len) 226 { 227 APPL_TRACE_DEBUG("bta_hh_co_data: UHID write"); 228 struct uhid_event ev; 229 memset(&ev, 0, sizeof(ev)); 230 ev.type = UHID_INPUT; 231 ev.u.input.size = len; 232 if(len > sizeof(ev.u.input.data)){ 233 APPL_TRACE_WARNING("%s: Report size greater than allowed size", 234 __FUNCTION__); 235 return -1; 236 } 237 memcpy(ev.u.input.data, rpt, len); 238 return uhid_write(fd, &ev); 239 240 } 241 242 243 /******************************************************************************* 244 ** 245 ** Function bta_hh_co_open 246 ** 247 ** Description When connection is opened, this call-out function is executed 248 ** by HH to do platform specific initialization. 249 ** 250 ** Returns void. 251 *******************************************************************************/ 252 void bta_hh_co_open(UINT8 dev_handle, UINT8 sub_class, tBTA_HH_ATTR_MASK attr_mask, 253 UINT8 app_id) 254 { 255 UINT32 i; 256 btif_hh_device_t *p_dev = NULL; 257 258 if (dev_handle == BTA_HH_INVALID_HANDLE) { 259 APPL_TRACE_WARNING("%s: Oops, dev_handle (%d) is invalid...", 260 __FUNCTION__, dev_handle); 261 return; 262 } 263 264 for (i = 0; i < BTIF_HH_MAX_HID; i++) { 265 p_dev = &btif_hh_cb.devices[i]; 266 if (p_dev->dev_status != BTHH_CONN_STATE_UNKNOWN && 267 p_dev->dev_handle == dev_handle) { 268 // We found a device with the same handle. Must be a device reconnected. 269 APPL_TRACE_WARNING("%s: Found an existing device with the same handle " 270 "dev_status = %d",__FUNCTION__, 271 p_dev->dev_status); 272 APPL_TRACE_WARNING("%s: bd_addr = [%02X:%02X:%02X:%02X:%02X:]", __FUNCTION__, 273 p_dev->bd_addr.address[0], p_dev->bd_addr.address[1], p_dev->bd_addr.address[2], 274 p_dev->bd_addr.address[3], p_dev->bd_addr.address[4]); 275 APPL_TRACE_WARNING("%s: attr_mask = 0x%04x, sub_class = 0x%02x, app_id = %d", 276 __FUNCTION__, p_dev->attr_mask, p_dev->sub_class, p_dev->app_id); 277 278 if(p_dev->fd<0) { 279 p_dev->fd = open(dev_path, O_RDWR | O_CLOEXEC); 280 if (p_dev->fd < 0){ 281 APPL_TRACE_ERROR("%s: Error: failed to open uhid, err:%s", 282 __FUNCTION__,strerror(errno)); 283 }else 284 APPL_TRACE_DEBUG("%s: uhid fd = %d", __FUNCTION__, p_dev->fd); 285 } 286 p_dev->hh_keep_polling = 1; 287 p_dev->hh_poll_thread_id = create_thread(btif_hh_poll_event_thread, p_dev); 288 break; 289 } 290 p_dev = NULL; 291 } 292 293 if (p_dev == NULL) { 294 // Did not find a device reconnection case. Find an empty slot now. 295 for (i = 0; i < BTIF_HH_MAX_HID; i++) { 296 if (btif_hh_cb.devices[i].dev_status == BTHH_CONN_STATE_UNKNOWN) { 297 p_dev = &btif_hh_cb.devices[i]; 298 p_dev->dev_handle = dev_handle; 299 p_dev->attr_mask = attr_mask; 300 p_dev->sub_class = sub_class; 301 p_dev->app_id = app_id; 302 p_dev->local_vup = FALSE; 303 304 btif_hh_cb.device_num++; 305 // This is a new device,open the uhid driver now. 306 p_dev->fd = open(dev_path, O_RDWR | O_CLOEXEC); 307 if (p_dev->fd < 0){ 308 APPL_TRACE_ERROR("%s: Error: failed to open uhid, err:%s", 309 __FUNCTION__,strerror(errno)); 310 }else{ 311 APPL_TRACE_DEBUG("%s: uhid fd = %d", __FUNCTION__, p_dev->fd); 312 p_dev->hh_keep_polling = 1; 313 p_dev->hh_poll_thread_id = create_thread(btif_hh_poll_event_thread, p_dev); 314 } 315 316 317 break; 318 } 319 } 320 } 321 322 if (p_dev == NULL) { 323 APPL_TRACE_ERROR("%s: Error: too many HID devices are connected", __FUNCTION__); 324 return; 325 } 326 327 p_dev->dev_status = BTHH_CONN_STATE_CONNECTED; 328 APPL_TRACE_DEBUG("%s: Return device status %d", __FUNCTION__, p_dev->dev_status); 329 } 330 331 332 /******************************************************************************* 333 ** 334 ** Function bta_hh_co_close 335 ** 336 ** Description When connection is closed, this call-out function is executed 337 ** by HH to do platform specific finalization. 338 ** 339 ** Parameters dev_handle - device handle 340 ** app_id - application id 341 ** 342 ** Returns void. 343 *******************************************************************************/ 344 void bta_hh_co_close(UINT8 dev_handle, UINT8 app_id) 345 { 346 UINT32 i; 347 btif_hh_device_t *p_dev = NULL; 348 349 APPL_TRACE_WARNING("%s: dev_handle = %d, app_id = %d", __FUNCTION__, dev_handle, app_id); 350 if (dev_handle == BTA_HH_INVALID_HANDLE) { 351 APPL_TRACE_WARNING("%s: Oops, dev_handle (%d) is invalid...", __FUNCTION__, dev_handle); 352 return; 353 } 354 355 for (i = 0; i < BTIF_HH_MAX_HID; i++) { 356 p_dev = &btif_hh_cb.devices[i]; 357 if (p_dev->dev_status != BTHH_CONN_STATE_UNKNOWN && p_dev->dev_handle == dev_handle) { 358 APPL_TRACE_WARNING("%s: Found an existing device with the same handle " 359 "dev_status = %d, dev_handle =%d" 360 ,__FUNCTION__,p_dev->dev_status 361 ,p_dev->dev_handle); 362 btif_hh_close_poll_thread(p_dev); 363 break; 364 } 365 } 366 } 367 368 369 /******************************************************************************* 370 ** 371 ** Function bta_hh_co_data 372 ** 373 ** Description This function is executed by BTA when HID host receive a data 374 ** report. 375 ** 376 ** Parameters dev_handle - device handle 377 ** *p_rpt - pointer to the report data 378 ** len - length of report data 379 ** mode - Hid host Protocol Mode 380 ** sub_clas - Device Subclass 381 ** app_id - application id 382 ** 383 ** Returns void 384 *******************************************************************************/ 385 void bta_hh_co_data(UINT8 dev_handle, UINT8 *p_rpt, UINT16 len, tBTA_HH_PROTO_MODE mode, 386 UINT8 sub_class, UINT8 ctry_code, BD_ADDR peer_addr, UINT8 app_id) 387 { 388 btif_hh_device_t *p_dev; 389 UNUSED(peer_addr); 390 391 APPL_TRACE_DEBUG("%s: dev_handle = %d, subclass = 0x%02X, mode = %d, " 392 "ctry_code = %d, app_id = %d", 393 __FUNCTION__, dev_handle, sub_class, mode, ctry_code, app_id); 394 395 p_dev = btif_hh_find_connected_dev_by_handle(dev_handle); 396 if (p_dev == NULL) { 397 APPL_TRACE_WARNING("%s: Error: unknown HID device handle %d", __FUNCTION__, dev_handle); 398 return; 399 } 400 // Send the HID report to the kernel. 401 if (p_dev->fd >= 0) { 402 bta_hh_co_write(p_dev->fd, p_rpt, len); 403 }else { 404 APPL_TRACE_WARNING("%s: Error: fd = %d, len = %d", __FUNCTION__, p_dev->fd, len); 405 } 406 } 407 408 409 /******************************************************************************* 410 ** 411 ** Function bta_hh_co_send_hid_info 412 ** 413 ** Description This function is called in btif_hh.c to process DSCP received. 414 ** 415 ** Parameters dev_handle - device handle 416 ** dscp_len - report descriptor length 417 ** *p_dscp - report descriptor 418 ** 419 ** Returns void 420 *******************************************************************************/ 421 void bta_hh_co_send_hid_info(btif_hh_device_t *p_dev, char *dev_name, UINT16 vendor_id, 422 UINT16 product_id, UINT16 version, UINT8 ctry_code, 423 int dscp_len, UINT8 *p_dscp) 424 { 425 int result; 426 struct uhid_event ev; 427 428 if (p_dev->fd < 0) { 429 APPL_TRACE_WARNING("%s: Error: fd = %d, dscp_len = %d", __FUNCTION__, p_dev->fd, dscp_len); 430 return; 431 } 432 433 APPL_TRACE_WARNING("%s: fd = %d, name = [%s], dscp_len = %d", __FUNCTION__, 434 p_dev->fd, dev_name, dscp_len); 435 APPL_TRACE_WARNING("%s: vendor_id = 0x%04x, product_id = 0x%04x, version= 0x%04x," 436 "ctry_code=0x%02x",__FUNCTION__, 437 vendor_id, product_id, 438 version, ctry_code); 439 440 //Create and send hid descriptor to kernel 441 memset(&ev, 0, sizeof(ev)); 442 ev.type = UHID_CREATE; 443 strncpy((char*)ev.u.create.name, dev_name, sizeof(ev.u.create.name) - 1); 444 snprintf((char*)ev.u.create.uniq, sizeof(ev.u.create.uniq), 445 "%2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X", 446 p_dev->bd_addr.address[5], p_dev->bd_addr.address[4], 447 p_dev->bd_addr.address[3], p_dev->bd_addr.address[2], 448 p_dev->bd_addr.address[1], p_dev->bd_addr.address[0]); 449 ev.u.create.rd_size = dscp_len; 450 ev.u.create.rd_data = p_dscp; 451 ev.u.create.bus = BUS_BLUETOOTH; 452 ev.u.create.vendor = vendor_id; 453 ev.u.create.product = product_id; 454 ev.u.create.version = version; 455 ev.u.create.country = ctry_code; 456 result = uhid_write(p_dev->fd, &ev); 457 458 APPL_TRACE_WARNING("%s: fd = %d, dscp_len = %d, result = %d", __FUNCTION__, 459 p_dev->fd, dscp_len, result); 460 461 if (result) { 462 APPL_TRACE_WARNING("%s: Error: failed to send DSCP, result = %d", __FUNCTION__, result); 463 464 /* The HID report descriptor is corrupted. Close the driver. */ 465 close(p_dev->fd); 466 p_dev->fd = -1; 467 } 468 } 469 470 #if (BLE_INCLUDED == TRUE && BTA_HH_LE_INCLUDED == TRUE) 471 /******************************************************************************* 472 ** 473 ** Function bta_hh_le_co_rpt_info 474 ** 475 ** Description This callout function is to convey the report information on 476 ** a HOGP device to the application. Application can save this 477 ** information in NV if device is bonded and load it back when 478 ** stack reboot. 479 ** 480 ** Parameters remote_bda - remote device address 481 ** p_entry - report entry pointer 482 ** app_id - application id 483 ** 484 ** Returns void. 485 ** 486 *******************************************************************************/ 487 void bta_hh_le_co_rpt_info(BD_ADDR remote_bda, tBTA_HH_RPT_CACHE_ENTRY *p_entry, UINT8 app_id) 488 { 489 UNUSED(app_id); 490 491 unsigned idx = 0; 492 493 bdstr_t bdstr; 494 sprintf(bdstr, "%02x:%02x:%02x:%02x:%02x:%02x", 495 remote_bda[0], remote_bda[1], remote_bda[2], 496 remote_bda[3], remote_bda[4], remote_bda[5]); 497 498 size_t len = btif_config_get_bin_length(bdstr, "HidReport"); 499 if (len >= sizeof(tBTA_HH_RPT_CACHE_ENTRY) && len <= sizeof(sReportCache)) 500 { 501 btif_config_get_bin(bdstr, "HidReport", (uint8_t *)sReportCache, &len); 502 idx = len / sizeof(tBTA_HH_RPT_CACHE_ENTRY); 503 } 504 505 if (idx < BTA_HH_NV_LOAD_MAX) 506 { 507 memcpy(&sReportCache[idx++], p_entry, sizeof(tBTA_HH_RPT_CACHE_ENTRY)); 508 btif_config_set_bin(bdstr, "HidReport", (const uint8_t *)sReportCache, 509 idx * sizeof(tBTA_HH_RPT_CACHE_ENTRY)); 510 BTIF_TRACE_DEBUG("%s() - Saving report; dev=%s, idx=%d", __FUNCTION__, bdstr, idx); 511 } 512 } 513 514 515 /******************************************************************************* 516 ** 517 ** Function bta_hh_le_co_cache_load 518 ** 519 ** Description This callout function is to request the application to load the 520 ** cached HOGP report if there is any. When cache reading is completed, 521 ** bta_hh_le_ci_cache_load() is called by the application. 522 ** 523 ** Parameters remote_bda - remote device address 524 ** p_num_rpt: number of cached report 525 ** app_id - application id 526 ** 527 ** Returns the acched report array 528 ** 529 *******************************************************************************/ 530 tBTA_HH_RPT_CACHE_ENTRY * bta_hh_le_co_cache_load (BD_ADDR remote_bda, 531 UINT8 *p_num_rpt, UINT8 app_id) 532 { 533 UNUSED(app_id); 534 535 unsigned idx = 0; 536 537 bdstr_t bdstr; 538 sprintf(bdstr, "%02x:%02x:%02x:%02x:%02x:%02x", 539 remote_bda[0], remote_bda[1], remote_bda[2], 540 remote_bda[3], remote_bda[4], remote_bda[5]); 541 542 size_t len = btif_config_get_bin_length(bdstr, "HidReport"); 543 if (!p_num_rpt && len < sizeof(tBTA_HH_RPT_CACHE_ENTRY)) 544 return NULL; 545 546 if (len > sizeof(sReportCache)) 547 len = sizeof(sReportCache); 548 btif_config_get_bin(bdstr, "HidReport", (uint8_t *)sReportCache, &len); 549 *p_num_rpt = len / sizeof(tBTA_HH_RPT_CACHE_ENTRY); 550 551 BTIF_TRACE_DEBUG("%s() - Loaded %d reports; dev=%s", __FUNCTION__, *p_num_rpt, bdstr); 552 553 return sReportCache; 554 } 555 556 /******************************************************************************* 557 ** 558 ** Function bta_hh_le_co_reset_rpt_cache 559 ** 560 ** Description This callout function is to reset the HOGP device cache. 561 ** 562 ** Parameters remote_bda - remote device address 563 ** 564 ** Returns none 565 ** 566 *******************************************************************************/ 567 void bta_hh_le_co_reset_rpt_cache (BD_ADDR remote_bda, UINT8 app_id) 568 { 569 UNUSED(app_id); 570 571 bdstr_t bdstr; 572 sprintf(bdstr, "%02x:%02x:%02x:%02x:%02x:%02x", 573 remote_bda[0], remote_bda[1], remote_bda[2], 574 remote_bda[3], remote_bda[4], remote_bda[5]); 575 btif_config_remove(bdstr, "HidReport"); 576 577 BTIF_TRACE_DEBUG("%s() - Reset cache for bda %s", __FUNCTION__, bdstr); 578 } 579 #endif /* #if (BLE_INCLUDED == TRUE && BTA_HH_LE_INCLUDED == TRUE) */ 580 581
