1 /****************************************************************************** 2 * 3 * Copyright (C) 2000-2012 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 /***************************************************************************** 20 * 21 * This file contains functions that manages ACL link modes. 22 * This includes operations such as active, hold, 23 * park and sniff modes. 24 * 25 * This module contains both internal and external (API) 26 * functions. External (API) functions are distinguishable 27 * by their names beginning with uppercase BTM. 28 * 29 *****************************************************************************/ 30 31 #define LOG_TAG "bt_btm_pm" 32 33 #include <stdlib.h> 34 #include <string.h> 35 #include <stdio.h> 36 #include <stddef.h> 37 38 #include "bt_types.h" 39 #include "gki.h" 40 #include "hcimsgs.h" 41 #include "btu.h" 42 #include "btm_api.h" 43 #include "btm_int.h" 44 #include "l2c_int.h" 45 #include "hcidefs.h" 46 #include "bt_utils.h" 47 #include "osi/include/log.h" 48 49 /*****************************************************************************/ 50 /* to handle different modes */ 51 /*****************************************************************************/ 52 #define BTM_PM_STORED_MASK 0x80 /* set this mask if the command is stored */ 53 #define BTM_PM_NUM_SET_MODES 3 /* only hold, sniff & park */ 54 55 /* Usage: (ptr_features[ offset ] & mask )?TRUE:FALSE */ 56 /* offset to supported feature */ 57 const UINT8 btm_pm_mode_off[BTM_PM_NUM_SET_MODES] = {0, 0, 1}; 58 /* mask to supported feature */ 59 const UINT8 btm_pm_mode_msk[BTM_PM_NUM_SET_MODES] = {0x40, 0x80, 0x01}; 60 61 #define BTM_PM_GET_MD1 1 62 #define BTM_PM_GET_MD2 2 63 #define BTM_PM_GET_COMP 3 64 65 const UINT8 btm_pm_md_comp_matrix[BTM_PM_NUM_SET_MODES*BTM_PM_NUM_SET_MODES] = 66 { 67 BTM_PM_GET_COMP, 68 BTM_PM_GET_MD2, 69 BTM_PM_GET_MD2, 70 71 BTM_PM_GET_MD1, 72 BTM_PM_GET_COMP, 73 BTM_PM_GET_MD1, 74 75 BTM_PM_GET_MD1, 76 BTM_PM_GET_MD2, 77 BTM_PM_GET_COMP 78 }; 79 80 /* function prototype */ 81 static int btm_pm_find_acl_ind(BD_ADDR remote_bda); 82 static tBTM_STATUS btm_pm_snd_md_req( UINT8 pm_id, int link_ind, tBTM_PM_PWR_MD *p_mode ); 83 static const char *mode_to_string(tBTM_PM_MODE mode); 84 85 /* 86 #ifdef BTM_PM_DEBUG 87 #undef BTM_PM_DEBUG 88 #define BTM_PM_DEBUG TRUE 89 #endif 90 */ 91 92 #if BTM_PM_DEBUG == TRUE 93 const char * btm_pm_state_str[] = 94 { 95 "pm_active_state", 96 "pm_hold_state", 97 "pm_sniff_state", 98 "pm_park_state", 99 "pm_pend_state" 100 }; 101 102 const char * btm_pm_event_str[] = 103 { 104 "pm_set_mode_event", 105 "pm_hci_sts_event", 106 "pm_mod_chg_event", 107 "pm_update_event" 108 }; 109 110 const char * btm_pm_action_str[] = 111 { 112 "pm_set_mode_action", 113 "pm_update_db_action", 114 "pm_mod_chg_action", 115 "pm_hci_sts_action", 116 "pm_update_action" 117 }; 118 #endif // BTM_PM_DEBUG 119 120 /*****************************************************************************/ 121 /* P U B L I C F U N C T I O N S */ 122 /*****************************************************************************/ 123 /******************************************************************************* 124 ** 125 ** Function BTM_PmRegister 126 ** 127 ** Description register or deregister with power manager 128 ** 129 ** Returns BTM_SUCCESS if successful, 130 ** BTM_NO_RESOURCES if no room to hold registration 131 ** BTM_ILLEGAL_VALUE 132 ** 133 *******************************************************************************/ 134 tBTM_STATUS BTM_PmRegister (UINT8 mask, UINT8 *p_pm_id, tBTM_PM_STATUS_CBACK *p_cb) 135 { 136 int xx; 137 138 /* de-register */ 139 if(mask & BTM_PM_DEREG) 140 { 141 if(*p_pm_id >= BTM_MAX_PM_RECORDS) 142 return BTM_ILLEGAL_VALUE; 143 btm_cb.pm_reg_db[*p_pm_id].mask = BTM_PM_REC_NOT_USED; 144 return BTM_SUCCESS; 145 } 146 147 for(xx=0; xx<BTM_MAX_PM_RECORDS; xx++) 148 { 149 /* find an unused entry */ 150 if(btm_cb.pm_reg_db[xx].mask == BTM_PM_REC_NOT_USED) 151 { 152 /* if register for notification, should provide callback routine */ 153 if(mask & BTM_PM_REG_NOTIF) 154 { 155 if(p_cb == NULL) 156 return BTM_ILLEGAL_VALUE; 157 btm_cb.pm_reg_db[xx].cback = p_cb; 158 } 159 btm_cb.pm_reg_db[xx].mask = mask; 160 *p_pm_id = xx; 161 return BTM_SUCCESS; 162 } 163 } 164 165 return BTM_NO_RESOURCES; 166 } 167 168 /******************************************************************************* 169 ** 170 ** Function BTM_SetPowerMode 171 ** 172 ** Description store the mode in control block or 173 ** alter ACL connection behavior. 174 ** 175 ** Returns BTM_SUCCESS if successful, 176 ** BTM_UNKNOWN_ADDR if bd addr is not active or bad 177 ** 178 *******************************************************************************/ 179 tBTM_STATUS BTM_SetPowerMode (UINT8 pm_id, BD_ADDR remote_bda, tBTM_PM_PWR_MD *p_mode) 180 { 181 UINT8 *p_features; 182 int ind, acl_ind; 183 tBTM_PM_MCB *p_cb = NULL; /* per ACL link */ 184 tBTM_PM_MODE mode; 185 int temp_pm_id; 186 187 188 if(pm_id >= BTM_MAX_PM_RECORDS) 189 pm_id = BTM_PM_SET_ONLY_ID; 190 191 if(p_mode == NULL) 192 return BTM_ILLEGAL_VALUE; 193 194 BTM_TRACE_API( "BTM_SetPowerMode: pm_id %d BDA: %08x mode:0x%x", pm_id, 195 (remote_bda[2]<<24)+(remote_bda[3]<<16)+(remote_bda[4]<<8)+remote_bda[5], p_mode->mode); 196 197 /* take out the force bit */ 198 mode = p_mode->mode & ~BTM_PM_MD_FORCE; 199 200 acl_ind = btm_pm_find_acl_ind(remote_bda); 201 if(acl_ind == MAX_L2CAP_LINKS) 202 return (BTM_UNKNOWN_ADDR); 203 204 p_cb = &(btm_cb.pm_mode_db[acl_ind]); 205 206 if(mode != BTM_PM_MD_ACTIVE) 207 { 208 /* check if the requested mode is supported */ 209 ind = mode - BTM_PM_MD_HOLD; /* make it base 0 */ 210 p_features = BTM_ReadLocalFeatures(); 211 if( !(p_features[ btm_pm_mode_off[ind] ] & btm_pm_mode_msk[ind] ) ) 212 return BTM_MODE_UNSUPPORTED; 213 } 214 215 if(mode == p_cb->state) /* the requested mode is current mode */ 216 { 217 /* already in the requested mode and the current interval has less latency than the max */ 218 if( (mode == BTM_PM_MD_ACTIVE) || 219 ((p_mode->mode & BTM_PM_MD_FORCE) && (p_mode->max >= p_cb->interval) && (p_mode->min <= p_cb->interval)) || 220 ((p_mode->mode & BTM_PM_MD_FORCE)==0 && (p_mode->max >= p_cb->interval)) ) 221 { 222 BTM_TRACE_DEBUG( "BTM_SetPowerMode: mode:0x%x interval %d max:%d, min:%d", p_mode->mode, p_cb->interval, p_mode->max, p_mode->min); 223 return BTM_SUCCESS; 224 } 225 } 226 227 temp_pm_id = pm_id; 228 if(pm_id == BTM_PM_SET_ONLY_ID) 229 temp_pm_id = BTM_MAX_PM_RECORDS; 230 231 /* update mode database */ 232 if( ((pm_id != BTM_PM_SET_ONLY_ID) && 233 (btm_cb.pm_reg_db[pm_id].mask & BTM_PM_REG_SET)) 234 || ((pm_id == BTM_PM_SET_ONLY_ID) && (btm_cb.pm_pend_link != MAX_L2CAP_LINKS)) ) 235 { 236 #if BTM_PM_DEBUG == TRUE 237 BTM_TRACE_DEBUG( "BTM_SetPowerMode: Saving cmd acl_ind %d temp_pm_id %d", acl_ind,temp_pm_id); 238 #endif // BTM_PM_DEBUG 239 /* Make sure mask is set to BTM_PM_REG_SET */ 240 btm_cb.pm_reg_db[temp_pm_id].mask |= BTM_PM_REG_SET; 241 *(&p_cb->req_mode[temp_pm_id]) = *((tBTM_PM_PWR_MD *)p_mode); 242 p_cb->chg_ind = TRUE; 243 } 244 245 #if BTM_PM_DEBUG == TRUE 246 BTM_TRACE_DEBUG( "btm_pm state:0x%x, pm_pend_link: %d", p_cb->state, btm_cb.pm_pend_link); 247 #endif // BTM_PM_DEBUG 248 /* if mode == hold or pending, return */ 249 if( (p_cb->state == BTM_PM_STS_HOLD) || 250 (p_cb->state == BTM_PM_STS_PENDING) || 251 (btm_cb.pm_pend_link != MAX_L2CAP_LINKS) ) /* command pending */ 252 { 253 if(acl_ind != btm_cb.pm_pend_link) 254 { 255 /* set the stored mask */ 256 p_cb->state |= BTM_PM_STORED_MASK; 257 BTM_TRACE_DEBUG( "btm_pm state stored:%d",acl_ind); 258 } 259 return BTM_CMD_STORED; 260 } 261 262 263 264 return btm_pm_snd_md_req(pm_id, acl_ind, p_mode); 265 } 266 267 /******************************************************************************* 268 ** 269 ** Function BTM_ReadPowerMode 270 ** 271 ** Description This returns the current mode for a specific 272 ** ACL connection. 273 ** 274 ** Input Param remote_bda - device address of desired ACL connection 275 ** 276 ** Output Param p_mode - address where the current mode is copied into. 277 ** BTM_ACL_MODE_NORMAL 278 ** BTM_ACL_MODE_HOLD 279 ** BTM_ACL_MODE_SNIFF 280 ** BTM_ACL_MODE_PARK 281 ** (valid only if return code is BTM_SUCCESS) 282 ** 283 ** Returns BTM_SUCCESS if successful, 284 ** BTM_UNKNOWN_ADDR if bd addr is not active or bad 285 ** 286 *******************************************************************************/ 287 tBTM_STATUS BTM_ReadPowerMode (BD_ADDR remote_bda, tBTM_PM_MODE *p_mode) 288 { 289 int acl_ind; 290 291 if( (acl_ind = btm_pm_find_acl_ind(remote_bda)) == MAX_L2CAP_LINKS) 292 return (BTM_UNKNOWN_ADDR); 293 294 *p_mode = btm_cb.pm_mode_db[acl_ind].state; 295 return BTM_SUCCESS; 296 } 297 298 /******************************************************************************* 299 ** 300 ** Function BTM_SetSsrParams 301 ** 302 ** Description This sends the given SSR parameters for the given ACL 303 ** connection if it is in ACTIVE mode. 304 ** 305 ** Input Param remote_bda - device address of desired ACL connection 306 ** max_lat - maximum latency (in 0.625ms)(0-0xFFFE) 307 ** min_rmt_to - minimum remote timeout 308 ** min_loc_to - minimum local timeout 309 ** 310 ** 311 ** Returns BTM_SUCCESS if the HCI command is issued successful, 312 ** BTM_UNKNOWN_ADDR if bd addr is not active or bad 313 ** BTM_CMD_STORED if the command is stored 314 ** 315 *******************************************************************************/ 316 tBTM_STATUS BTM_SetSsrParams (BD_ADDR remote_bda, UINT16 max_lat, 317 UINT16 min_rmt_to, UINT16 min_loc_to) 318 { 319 #if (BTM_SSR_INCLUDED == TRUE) 320 int acl_ind; 321 tBTM_PM_MCB *p_cb; 322 323 if( (acl_ind = btm_pm_find_acl_ind(remote_bda)) == MAX_L2CAP_LINKS) 324 return (BTM_UNKNOWN_ADDR); 325 326 if(BTM_PM_STS_ACTIVE == btm_cb.pm_mode_db[acl_ind].state || 327 BTM_PM_STS_SNIFF == btm_cb.pm_mode_db[acl_ind].state) 328 { 329 if (btsnd_hcic_sniff_sub_rate(btm_cb.acl_db[acl_ind].hci_handle, max_lat, 330 min_rmt_to, min_loc_to)) 331 return BTM_SUCCESS; 332 else 333 return BTM_NO_RESOURCES; 334 } 335 p_cb = &btm_cb.pm_mode_db[acl_ind]; 336 p_cb->max_lat = max_lat; 337 p_cb->min_rmt_to = min_rmt_to; 338 p_cb->min_loc_to = min_loc_to; 339 return BTM_CMD_STORED; 340 #else 341 return BTM_ILLEGAL_ACTION; 342 #endif // BTM_SSR_INCLUDED 343 } 344 345 /******************************************************************************* 346 ** 347 ** Function btm_pm_reset 348 ** 349 ** Description as a part of the BTM reset process. 350 ** 351 ** Returns void 352 ** 353 *******************************************************************************/ 354 void btm_pm_reset(void) 355 { 356 int xx; 357 tBTM_PM_STATUS_CBACK *cb = NULL; 358 359 /* clear the pending request for application */ 360 if( (btm_cb.pm_pend_id != BTM_PM_SET_ONLY_ID) && 361 (btm_cb.pm_reg_db[btm_cb.pm_pend_id].mask & BTM_PM_REG_NOTIF) ) 362 { 363 cb = btm_cb.pm_reg_db[btm_cb.pm_pend_id].cback; 364 } 365 366 367 /* clear the register record */ 368 for(xx=0; xx<BTM_MAX_PM_RECORDS; xx++) 369 { 370 btm_cb.pm_reg_db[xx].mask = BTM_PM_REC_NOT_USED; 371 } 372 373 if(cb != NULL && btm_cb.pm_pend_link < MAX_L2CAP_LINKS) 374 (*cb)(btm_cb.acl_db[btm_cb.pm_pend_link].remote_addr, BTM_PM_STS_ERROR, BTM_DEV_RESET, 0); 375 376 /* no command pending */ 377 btm_cb.pm_pend_link = MAX_L2CAP_LINKS; 378 } 379 380 /******************************************************************************* 381 ** 382 ** Function btm_pm_sm_alloc 383 ** 384 ** Description This function initializes the control block of an ACL link. 385 ** It is called when an ACL connection is created. 386 ** 387 ** Returns void 388 ** 389 *******************************************************************************/ 390 void btm_pm_sm_alloc(UINT8 ind) 391 { 392 tBTM_PM_MCB *p_db = &btm_cb.pm_mode_db[ind]; /* per ACL link */ 393 memset (p_db, 0, sizeof(tBTM_PM_MCB)); 394 p_db->state = BTM_PM_ST_ACTIVE; 395 #if BTM_PM_DEBUG == TRUE 396 BTM_TRACE_DEBUG( "btm_pm_sm_alloc ind:%d st:%d", ind, p_db->state); 397 #endif // BTM_PM_DEBUG 398 } 399 400 /******************************************************************************* 401 ** 402 ** Function btm_pm_find_acl_ind 403 ** 404 ** Description This function initializes the control block of an ACL link. 405 ** It is called when an ACL connection is created. 406 ** 407 ** Returns void 408 ** 409 *******************************************************************************/ 410 static int btm_pm_find_acl_ind(BD_ADDR remote_bda) 411 { 412 tACL_CONN *p = &btm_cb.acl_db[0]; 413 UINT8 xx; 414 415 for (xx = 0; xx < MAX_L2CAP_LINKS; xx++, p++) 416 { 417 if ((p->in_use) && (!memcmp (p->remote_addr, remote_bda, BD_ADDR_LEN)) 418 #if (BLE_INCLUDED == TRUE) 419 && p->transport == BT_TRANSPORT_BR_EDR 420 #endif // BLE_INCLUDED 421 ) 422 { 423 #if BTM_PM_DEBUG == TRUE 424 BTM_TRACE_DEBUG( "btm_pm_find_acl_ind ind:%d, st:%d", xx, btm_cb.pm_mode_db[xx].state); 425 #endif // BTM_PM_DEBUG 426 break; 427 } 428 } 429 return xx; 430 } 431 432 /******************************************************************************* 433 ** 434 ** Function btm_pm_compare_modes 435 ** Description get the "more active" mode of the 2 436 ** Returns void 437 ** 438 *******************************************************************************/ 439 static tBTM_PM_PWR_MD * btm_pm_compare_modes(tBTM_PM_PWR_MD *p_md1, tBTM_PM_PWR_MD *p_md2, tBTM_PM_PWR_MD *p_res) 440 { 441 UINT8 res; 442 443 if(p_md1 == NULL) 444 { 445 *p_res = *p_md2; 446 p_res->mode &= ~BTM_PM_MD_FORCE; 447 448 return p_md2; 449 } 450 451 if(p_md2->mode == BTM_PM_MD_ACTIVE || p_md1->mode == BTM_PM_MD_ACTIVE) 452 { 453 return NULL; 454 } 455 456 /* check if force bit is involved */ 457 if(p_md1->mode & BTM_PM_MD_FORCE) 458 { 459 *p_res = *p_md1; 460 p_res->mode &= ~BTM_PM_MD_FORCE; 461 return p_res; 462 } 463 464 if(p_md2->mode & BTM_PM_MD_FORCE) 465 { 466 *p_res = *p_md2; 467 p_res->mode &= ~BTM_PM_MD_FORCE; 468 return p_res; 469 } 470 471 res = (p_md1->mode - 1) * BTM_PM_NUM_SET_MODES + (p_md2->mode - 1); 472 res = btm_pm_md_comp_matrix[res]; 473 switch(res) 474 { 475 case BTM_PM_GET_MD1: 476 *p_res = *p_md1; 477 return p_md1; 478 479 case BTM_PM_GET_MD2: 480 *p_res = *p_md2; 481 return p_md2; 482 483 case BTM_PM_GET_COMP: 484 p_res->mode = p_md1->mode; 485 /* min of the two */ 486 p_res->max = (p_md1->max < p_md2->max)? (p_md1->max) : (p_md2->max); 487 /* max of the two */ 488 p_res->min = (p_md1->min > p_md2->min)? (p_md1->min) : (p_md2->min); 489 490 /* the intersection is NULL */ 491 if( p_res->max < p_res->min) 492 return NULL; 493 494 if(p_res->mode == BTM_PM_MD_SNIFF) 495 { 496 /* max of the two */ 497 p_res->attempt = (p_md1->attempt > p_md2->attempt)? (p_md1->attempt) : (p_md2->attempt); 498 p_res->timeout = (p_md1->timeout > p_md2->timeout)? (p_md1->timeout) : (p_md2->timeout); 499 } 500 return p_res; 501 } 502 return NULL; 503 } 504 505 /******************************************************************************* 506 ** 507 ** Function btm_pm_get_set_mode 508 ** Description get the resulting mode from the registered parties, then compare it 509 ** with the requested mode, if the command is from an unregistered party. 510 ** Returns void 511 ** 512 *******************************************************************************/ 513 static tBTM_PM_MODE btm_pm_get_set_mode(UINT8 pm_id, tBTM_PM_MCB *p_cb, tBTM_PM_PWR_MD *p_mode, tBTM_PM_PWR_MD *p_res) 514 { 515 int xx, loop_max; 516 tBTM_PM_PWR_MD *p_md = NULL; 517 518 if(p_mode != NULL && p_mode->mode & BTM_PM_MD_FORCE) 519 { 520 *p_res = *p_mode; 521 p_res->mode &= ~BTM_PM_MD_FORCE; 522 return p_res->mode; 523 } 524 525 if(!p_mode) 526 loop_max = BTM_MAX_PM_RECORDS+1; 527 else 528 loop_max = BTM_MAX_PM_RECORDS; 529 530 for( xx=0; xx<loop_max; xx++) 531 { 532 /* g through all the registered "set" parties */ 533 if(btm_cb.pm_reg_db[xx].mask & BTM_PM_REG_SET) 534 { 535 if(p_cb->req_mode[xx].mode == BTM_PM_MD_ACTIVE) 536 { 537 /* if at least one registered (SET) party says ACTIVE, stay active */ 538 return BTM_PM_MD_ACTIVE; 539 } 540 else 541 { 542 /* if registered parties give conflicting information, stay active */ 543 if( (btm_pm_compare_modes(p_md, &p_cb->req_mode[xx], p_res)) == NULL) 544 return BTM_PM_MD_ACTIVE; 545 p_md = p_res; 546 } 547 } 548 } 549 550 /* if the resulting mode is NULL(nobody registers SET), use the requested mode */ 551 if(p_md == NULL) 552 { 553 if(p_mode) 554 *p_res = *((tBTM_PM_PWR_MD *)p_mode); 555 else /* p_mode is NULL when btm_pm_snd_md_req is called from btm_pm_proc_mode_change */ 556 return BTM_PM_MD_ACTIVE; 557 } 558 else 559 { 560 /* if the command is from unregistered party, 561 compare the resulting mode from registered party*/ 562 if( (pm_id == BTM_PM_SET_ONLY_ID) && 563 ((btm_pm_compare_modes(p_mode, p_md, p_res)) == NULL) ) 564 return BTM_PM_MD_ACTIVE; 565 } 566 567 return p_res->mode; 568 } 569 570 /******************************************************************************* 571 ** 572 ** Function btm_pm_snd_md_req 573 ** Description get the resulting mode and send the resuest to host controller 574 ** Returns tBTM_STATUS 575 **, BOOLEAN *p_chg_ind 576 *******************************************************************************/ 577 static tBTM_STATUS btm_pm_snd_md_req(UINT8 pm_id, int link_ind, tBTM_PM_PWR_MD *p_mode) 578 { 579 tBTM_PM_PWR_MD md_res; 580 tBTM_PM_MODE mode; 581 tBTM_PM_MCB *p_cb = &btm_cb.pm_mode_db[link_ind]; 582 BOOLEAN chg_ind = FALSE; 583 584 mode = btm_pm_get_set_mode(pm_id, p_cb, p_mode, &md_res); 585 md_res.mode = mode; 586 587 #if BTM_PM_DEBUG == TRUE 588 BTM_TRACE_DEBUG( "btm_pm_snd_md_req link_ind:%d, mode: %d", 589 link_ind, mode); 590 #endif // BTM_PM_DEBUG 591 592 if( p_cb->state == mode) 593 { 594 /* already in the resulting mode */ 595 if( (mode == BTM_PM_MD_ACTIVE) || 596 ((md_res.max >= p_cb->interval) && (md_res.min <= p_cb->interval)) ) 597 return BTM_CMD_STORED; 598 /* Otherwise, needs to wake, then sleep */ 599 chg_ind = TRUE; 600 } 601 p_cb->chg_ind = chg_ind; 602 603 /* cannot go directly from current mode to resulting mode. */ 604 if( mode != BTM_PM_MD_ACTIVE && p_cb->state != BTM_PM_MD_ACTIVE) 605 p_cb->chg_ind = TRUE; /* needs to wake, then sleep */ 606 607 if(p_cb->chg_ind == TRUE) /* needs to wake first */ 608 md_res.mode = BTM_PM_MD_ACTIVE; 609 #if (BTM_SSR_INCLUDED == TRUE) 610 else if(BTM_PM_MD_SNIFF == md_res.mode && p_cb->max_lat) 611 { 612 btsnd_hcic_sniff_sub_rate(btm_cb.acl_db[link_ind].hci_handle, p_cb->max_lat, 613 p_cb->min_rmt_to, p_cb->min_loc_to); 614 p_cb->max_lat = 0; 615 } 616 #endif // BTM_SSR_INCLUDED 617 /* Default is failure */ 618 btm_cb.pm_pend_link = MAX_L2CAP_LINKS; 619 620 /* send the appropriate HCI command */ 621 btm_cb.pm_pend_id = pm_id; 622 623 #if BTM_PM_DEBUG == TRUE 624 BTM_TRACE_DEBUG("btm_pm_snd_md_req state:0x%x, link_ind: %d", p_cb->state, link_ind); 625 #endif // BTM_PM_DEBUG 626 627 LOG_DEBUG("%s switching from %s to %s.", __func__, mode_to_string(p_cb->state), mode_to_string(md_res.mode)); 628 switch(md_res.mode) 629 { 630 case BTM_PM_MD_ACTIVE: 631 switch(p_cb->state) 632 { 633 case BTM_PM_MD_SNIFF: 634 if (btsnd_hcic_exit_sniff_mode(btm_cb.acl_db[link_ind].hci_handle)) 635 { 636 btm_cb.pm_pend_link = link_ind; 637 } 638 break; 639 case BTM_PM_MD_PARK: 640 if (btsnd_hcic_exit_park_mode(btm_cb.acl_db[link_ind].hci_handle)) 641 { 642 btm_cb.pm_pend_link = link_ind; 643 } 644 break; 645 default: 646 /* Failure btm_cb.pm_pend_link = MAX_L2CAP_LINKS */ 647 break; 648 } 649 break; 650 651 case BTM_PM_MD_HOLD: 652 if (btsnd_hcic_hold_mode (btm_cb.acl_db[link_ind].hci_handle, 653 md_res.max, md_res.min)) 654 { 655 btm_cb.pm_pend_link = link_ind; 656 } 657 break; 658 659 case BTM_PM_MD_SNIFF: 660 if (btsnd_hcic_sniff_mode (btm_cb.acl_db[link_ind].hci_handle, 661 md_res.max, md_res.min, md_res.attempt, 662 md_res.timeout)) 663 { 664 btm_cb.pm_pend_link = link_ind; 665 } 666 break; 667 668 case BTM_PM_MD_PARK: 669 if (btsnd_hcic_park_mode (btm_cb.acl_db[link_ind].hci_handle, 670 md_res.max, md_res.min)) 671 { 672 btm_cb.pm_pend_link = link_ind; 673 } 674 break; 675 default: 676 /* Failure btm_cb.pm_pend_link = MAX_L2CAP_LINKS */ 677 break; 678 } 679 680 if(btm_cb.pm_pend_link == MAX_L2CAP_LINKS) 681 { 682 /* the command was not sent */ 683 #if BTM_PM_DEBUG == TRUE 684 BTM_TRACE_DEBUG( "pm_pend_link: %d",btm_cb.pm_pend_link); 685 #endif // BTM_PM_DEBUG 686 return (BTM_NO_RESOURCES); 687 } 688 689 return BTM_CMD_STARTED; 690 } 691 692 /******************************************************************************* 693 ** 694 ** Function btm_pm_check_stored 695 ** 696 ** Description This function is called when an HCI command status event occurs 697 ** to check if there's any PM command issued while waiting for 698 ** HCI command status. 699 ** 700 ** Returns none. 701 ** 702 *******************************************************************************/ 703 static void btm_pm_check_stored(void) 704 { 705 int xx; 706 for(xx=0; xx<MAX_L2CAP_LINKS; xx++) 707 { 708 if(btm_cb.pm_mode_db[xx].state & BTM_PM_STORED_MASK) 709 { 710 btm_cb.pm_mode_db[xx].state &= ~BTM_PM_STORED_MASK; 711 BTM_TRACE_DEBUG( "btm_pm_check_stored :%d", xx); 712 btm_pm_snd_md_req(BTM_PM_SET_ONLY_ID, xx, NULL); 713 break; 714 } 715 } 716 } 717 718 719 /******************************************************************************* 720 ** 721 ** Function btm_pm_proc_cmd_status 722 ** 723 ** Description This function is called when an HCI command status event occurs 724 ** for power manager related commands. 725 ** 726 ** Input Parms status - status of the event (HCI_SUCCESS if no errors) 727 ** 728 ** Returns none. 729 ** 730 *******************************************************************************/ 731 void btm_pm_proc_cmd_status(UINT8 status) 732 { 733 tBTM_PM_MCB *p_cb; 734 tBTM_PM_STATUS pm_status; 735 736 if(btm_cb.pm_pend_link >= MAX_L2CAP_LINKS) 737 return; 738 739 p_cb = &btm_cb.pm_mode_db[btm_cb.pm_pend_link]; 740 741 if(status == HCI_SUCCESS) 742 { 743 p_cb->state = BTM_PM_ST_PENDING; 744 pm_status = BTM_PM_STS_PENDING; 745 #if BTM_PM_DEBUG == TRUE 746 BTM_TRACE_DEBUG( "btm_pm_proc_cmd_status new state:0x%x", p_cb->state); 747 #endif // BTM_PM_DEBUG 748 } 749 else /* the command was not successfull. Stay in the same state */ 750 { 751 pm_status = BTM_PM_STS_ERROR; 752 } 753 754 /* notify the caller is appropriate */ 755 if( (btm_cb.pm_pend_id != BTM_PM_SET_ONLY_ID) && 756 (btm_cb.pm_reg_db[btm_cb.pm_pend_id].mask & BTM_PM_REG_NOTIF) ) 757 { 758 (*btm_cb.pm_reg_db[btm_cb.pm_pend_id].cback)(btm_cb.acl_db[btm_cb.pm_pend_link].remote_addr, pm_status, 0, status); 759 } 760 761 /* no pending cmd now */ 762 #if BTM_PM_DEBUG == TRUE 763 BTM_TRACE_DEBUG( "btm_pm_proc_cmd_status state:0x%x, pm_pend_link: %d(new: %d)", 764 p_cb->state, btm_cb.pm_pend_link, MAX_L2CAP_LINKS); 765 #endif // BTM_PM_DEBUG 766 btm_cb.pm_pend_link = MAX_L2CAP_LINKS; 767 768 btm_pm_check_stored(); 769 } 770 771 /******************************************************************************* 772 ** 773 ** Function btm_process_mode_change 774 ** 775 ** Description This function is called when an HCI mode change event occurs. 776 ** 777 ** Input Parms hci_status - status of the event (HCI_SUCCESS if no errors) 778 ** hci_handle - connection handle associated with the change 779 ** mode - HCI_MODE_ACTIVE, HCI_MODE_HOLD, HCI_MODE_SNIFF, or HCI_MODE_PARK 780 ** interval - number of baseband slots (meaning depends on mode) 781 ** 782 ** Returns none. 783 ** 784 *******************************************************************************/ 785 void btm_pm_proc_mode_change (UINT8 hci_status, UINT16 hci_handle, UINT8 mode, UINT16 interval) 786 { 787 tACL_CONN *p; 788 tBTM_PM_MCB *p_cb = NULL; 789 int xx, yy, zz; 790 tBTM_PM_STATE old_state; 791 tL2C_LCB *p_lcb; 792 793 /* get the index to acl_db */ 794 if ((xx = btm_handle_to_acl_index(hci_handle)) >= MAX_L2CAP_LINKS) 795 return; 796 797 p = &btm_cb.acl_db[xx]; 798 799 /* update control block */ 800 p_cb = &(btm_cb.pm_mode_db[xx]); 801 old_state = p_cb->state; 802 p_cb->state = mode; 803 p_cb->interval = interval; 804 805 LOG_DEBUG("%s switched from %s to %s.", __func__, mode_to_string(old_state), mode_to_string(p_cb->state)); 806 807 if ((p_lcb = l2cu_find_lcb_by_bd_addr(p->remote_addr, BT_TRANSPORT_BR_EDR)) != NULL) 808 { 809 if ((p_cb->state == BTM_PM_ST_ACTIVE) || (p_cb->state == BTM_PM_ST_SNIFF)) 810 { 811 /* There might be any pending packets due to SNIFF or PENDING state */ 812 /* Trigger L2C to start transmission of the pending packets. */ 813 BTM_TRACE_DEBUG("btm mode change to active; check l2c_link for outgoing packets"); 814 l2c_link_check_send_pkts(p_lcb, NULL, NULL); 815 } 816 } 817 818 /* notify registered parties */ 819 for(yy=0; yy<=BTM_MAX_PM_RECORDS; yy++) 820 { 821 /* set req_mode HOLD mode->ACTIVE */ 822 if( (mode == BTM_PM_MD_ACTIVE) && (p_cb->req_mode[yy].mode == BTM_PM_MD_HOLD) ) 823 p_cb->req_mode[yy].mode = BTM_PM_MD_ACTIVE; 824 } 825 826 /* new request has been made. - post a message to BTU task */ 827 if(old_state & BTM_PM_STORED_MASK) 828 { 829 #if BTM_PM_DEBUG == TRUE 830 BTM_TRACE_DEBUG( "btm_pm_proc_mode_change: Sending stored req:%d", xx); 831 #endif // BTM_PM_DEBUG 832 btm_pm_snd_md_req(BTM_PM_SET_ONLY_ID, xx, NULL); 833 } 834 else 835 { 836 for(zz=0; zz<MAX_L2CAP_LINKS; zz++) 837 { 838 if(btm_cb.pm_mode_db[zz].chg_ind == TRUE) 839 { 840 #if BTM_PM_DEBUG == TRUE 841 BTM_TRACE_DEBUG( "btm_pm_proc_mode_change: Sending PM req :%d", zz); 842 #endif // BTM_PM_DEBUG 843 btm_pm_snd_md_req(BTM_PM_SET_ONLY_ID, zz, NULL); 844 break; 845 } 846 } 847 } 848 849 850 /* notify registered parties */ 851 for(yy=0; yy<BTM_MAX_PM_RECORDS; yy++) 852 { 853 if(btm_cb.pm_reg_db[yy].mask & BTM_PM_REG_NOTIF) 854 { 855 (*btm_cb.pm_reg_db[yy].cback)( p->remote_addr, mode, interval, hci_status); 856 } 857 } 858 859 /* If mode change was because of an active role switch or change link key */ 860 btm_cont_rswitch(p, btm_find_dev(p->remote_addr), hci_status); 861 } 862 863 /******************************************************************************* 864 ** 865 ** Function btm_pm_proc_ssr_evt 866 ** 867 ** Description This function is called when an HCI sniff subrating event occurs. 868 ** 869 ** Returns none. 870 ** 871 *******************************************************************************/ 872 #if (BTM_SSR_INCLUDED == TRUE) 873 void btm_pm_proc_ssr_evt (UINT8 *p, UINT16 evt_len) 874 { 875 UINT8 status; 876 UINT16 handle; 877 UINT16 max_rx_lat; 878 int xx, yy; 879 tBTM_PM_MCB *p_cb; 880 tACL_CONN *p_acl=NULL; 881 UINT16 use_ssr = TRUE; 882 UNUSED(evt_len); 883 884 STREAM_TO_UINT8 (status, p); 885 886 STREAM_TO_UINT16 (handle, p); 887 /* get the index to acl_db */ 888 if ((xx = btm_handle_to_acl_index(handle)) >= MAX_L2CAP_LINKS) 889 return; 890 891 p += 2; 892 STREAM_TO_UINT16 (max_rx_lat, p); 893 p_cb = &(btm_cb.pm_mode_db[xx]); 894 895 p_acl = &btm_cb.acl_db[xx]; 896 if(p_cb->interval == max_rx_lat) 897 { 898 /* using legacy sniff */ 899 use_ssr = FALSE; 900 } 901 902 /* notify registered parties */ 903 for(yy=0; yy<BTM_MAX_PM_RECORDS; yy++) 904 { 905 if(btm_cb.pm_reg_db[yy].mask & BTM_PM_REG_NOTIF) 906 { 907 if( p_acl) 908 { 909 (*btm_cb.pm_reg_db[yy].cback)( p_acl->remote_addr, BTM_PM_STS_SSR, use_ssr, status); 910 } 911 } 912 } 913 } 914 #endif // BTM_SSR_INCLUDED 915 916 /******************************************************************************* 917 ** 918 ** Function btm_pm_device_in_active_or_sniff_mode 919 ** 920 ** Description This function is called to check if in active or sniff mode 921 ** 922 ** Returns TRUE, if in active or sniff mode 923 ** 924 *******************************************************************************/ 925 BOOLEAN btm_pm_device_in_active_or_sniff_mode(void) 926 { 927 /* The active state is the highest state-includes connected device and sniff mode*/ 928 929 /* Covers active and sniff modes */ 930 if (BTM_GetNumAclLinks() > 0) 931 { 932 BTM_TRACE_DEBUG("%s - ACL links: %d", __func__, BTM_GetNumAclLinks()); 933 return TRUE; 934 } 935 936 #if ((defined BLE_INCLUDED) && (BLE_INCLUDED == TRUE)) 937 /* Check BLE states */ 938 if (btm_ble_get_conn_st() != BLE_CONN_IDLE) 939 { 940 BTM_TRACE_DEBUG("%s - BLE state: %x", __func__, btm_ble_get_conn_st()); 941 return TRUE; 942 } 943 #endif 944 945 return FALSE; 946 } 947 948 /******************************************************************************* 949 ** 950 ** Function btm_pm_device_in_scan_state 951 ** 952 ** Description This function is called to check if in paging, inquiry or connecting mode 953 ** 954 ** Returns TRUE, if in paging, inquiry or connecting mode 955 ** 956 *******************************************************************************/ 957 BOOLEAN btm_pm_device_in_scan_state(void) 958 { 959 /* Scan state-paging, inquiry, and trying to connect */ 960 961 /* Check for paging */ 962 if (btm_cb.is_paging || GKI_queue_length(&btm_cb.page_queue) > 0 || 963 BTM_BL_PAGING_STARTED == btm_cb.busy_level) 964 { 965 BTM_TRACE_DEBUG("btm_pm_device_in_scan_state- paging"); 966 return TRUE; 967 } 968 969 /* Check for inquiry */ 970 if ((btm_cb.btm_inq_vars.inq_active & (BTM_BR_INQ_ACTIVE_MASK | BTM_BLE_INQ_ACTIVE_MASK)) != 0) 971 { 972 BTM_TRACE_DEBUG("btm_pm_device_in_scan_state- Inq active"); 973 return TRUE; 974 } 975 976 return FALSE; 977 } 978 979 /******************************************************************************* 980 ** 981 ** Function BTM_PM_ReadControllerState 982 ** 983 ** Description This function is called to obtain the controller state 984 ** 985 ** Returns Controller State-BTM_CONTRL_ACTIVE, BTM_CONTRL_SCAN, and BTM_CONTRL_IDLE 986 ** 987 *******************************************************************************/ 988 tBTM_CONTRL_STATE BTM_PM_ReadControllerState(void) 989 { 990 if (TRUE == btm_pm_device_in_active_or_sniff_mode()) 991 return BTM_CONTRL_ACTIVE; 992 else 993 if (TRUE == btm_pm_device_in_scan_state()) 994 return BTM_CONTRL_SCAN; 995 else 996 return BTM_CONTRL_IDLE; 997 } 998 999 static const char *mode_to_string(tBTM_PM_MODE mode) { 1000 switch (mode) { 1001 case BTM_PM_MD_ACTIVE: return "ACTIVE"; 1002 case BTM_PM_MD_SNIFF: return "SNIFF"; 1003 case BTM_PM_MD_PARK: return "PARK"; 1004 case BTM_PM_MD_HOLD: return "HOLD"; 1005 default: return "UNKNOWN"; 1006 } 1007 } 1008
