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 #include <stdlib.h> 32 #include <string.h> 33 #include <stdio.h> 34 #include <stddef.h> 35 #include "bt_types.h" 36 #include "gki.h" 37 #include "hcimsgs.h" 38 #include "btu.h" 39 #include "btm_api.h" 40 #include "btm_int.h" 41 #include "l2c_int.h" 42 #include "hcidefs.h" 43 44 45 #if BTM_PWR_MGR_INCLUDED == TRUE 46 47 /* This compile option is only useful when the FW has a bug 48 * it automatically uses single slot when entering SNIFF mode, but does not restore the setting 49 * This issue was found when A2DP link goes into sniff and existing sniff still has choppy audio. 50 * If this issue is seen, look for FW solution first. 51 * This work around code will be removed later. */ 52 #ifndef BTM_PM_SNIFF_SLOT_WORK_AROUND 53 #define BTM_PM_SNIFF_SLOT_WORK_AROUND FALSE 54 #endif 55 56 /*****************************************************************************/ 57 /* to handle different modes */ 58 /*****************************************************************************/ 59 #define BTM_PM_STORED_MASK 0x80 /* set this mask if the command is stored */ 60 #define BTM_PM_NUM_SET_MODES 3 /* only hold, sniff & park */ 61 62 /* Usage: (ptr_features[ offset ] & mask )?TRUE:FALSE */ 63 /* offset to supported feature */ 64 const UINT8 btm_pm_mode_off[BTM_PM_NUM_SET_MODES] = {0, 0, 1}; 65 /* mask to supported feature */ 66 const UINT8 btm_pm_mode_msk[BTM_PM_NUM_SET_MODES] = {0x40, 0x80, 0x01}; 67 68 #define BTM_PM_GET_MD1 1 69 #define BTM_PM_GET_MD2 2 70 #define BTM_PM_GET_COMP 3 71 72 const UINT8 btm_pm_md_comp_matrix[BTM_PM_NUM_SET_MODES*BTM_PM_NUM_SET_MODES] = 73 { 74 BTM_PM_GET_COMP, 75 BTM_PM_GET_MD2, 76 BTM_PM_GET_MD2, 77 78 BTM_PM_GET_MD1, 79 BTM_PM_GET_COMP, 80 BTM_PM_GET_MD1, 81 82 BTM_PM_GET_MD1, 83 BTM_PM_GET_MD2, 84 BTM_PM_GET_COMP 85 }; 86 87 /* function prototype */ 88 static int btm_pm_find_acl_ind(BD_ADDR remote_bda); 89 static tBTM_STATUS btm_pm_snd_md_req( UINT8 pm_id, int link_ind, tBTM_PM_PWR_MD *p_mode ); 90 91 /* 92 #ifdef BTM_PM_DEBUG 93 #undef BTM_PM_DEBUG 94 #define BTM_PM_DEBUG TRUE 95 #endif 96 */ 97 98 #if BTM_PM_DEBUG == TRUE 99 const char * btm_pm_state_str[] = 100 { 101 "pm_active_state", 102 "pm_hold_state", 103 "pm_sniff_state", 104 "pm_park_state", 105 "pm_pend_state" 106 }; 107 108 const char * btm_pm_event_str[] = 109 { 110 "pm_set_mode_event", 111 "pm_hci_sts_event", 112 "pm_mod_chg_event", 113 "pm_update_event" 114 }; 115 116 const char * btm_pm_action_str[] = 117 { 118 "pm_set_mode_action", 119 "pm_update_db_action", 120 "pm_mod_chg_action", 121 "pm_hci_sts_action", 122 "pm_update_action" 123 }; 124 #endif 125 126 /*****************************************************************************/ 127 /* P U B L I C F U N C T I O N S */ 128 /*****************************************************************************/ 129 /******************************************************************************* 130 ** 131 ** Function BTM_PmRegister 132 ** 133 ** Description register or deregister with power manager 134 ** 135 ** Returns BTM_SUCCESS if successful, 136 ** BTM_NO_RESOURCES if no room to hold registration 137 ** BTM_ILLEGAL_VALUE 138 ** 139 *******************************************************************************/ 140 tBTM_STATUS BTM_PmRegister (UINT8 mask, UINT8 *p_pm_id, tBTM_PM_STATUS_CBACK *p_cb) 141 { 142 int xx; 143 144 /* de-register */ 145 if(mask & BTM_PM_DEREG) 146 { 147 if(*p_pm_id >= BTM_MAX_PM_RECORDS) 148 return BTM_ILLEGAL_VALUE; 149 btm_cb.pm_reg_db[*p_pm_id].mask = BTM_PM_REC_NOT_USED; 150 return BTM_SUCCESS; 151 } 152 153 for(xx=0; xx<BTM_MAX_PM_RECORDS; xx++) 154 { 155 /* find an unused entry */ 156 if(btm_cb.pm_reg_db[xx].mask == BTM_PM_REC_NOT_USED) 157 { 158 /* if register for notification, should provide callback routine */ 159 if(mask & BTM_PM_REG_NOTIF) 160 { 161 if(p_cb == NULL) 162 return BTM_ILLEGAL_VALUE; 163 btm_cb.pm_reg_db[xx].cback = p_cb; 164 } 165 btm_cb.pm_reg_db[xx].mask = mask; 166 *p_pm_id = xx; 167 return BTM_SUCCESS; 168 } 169 } 170 171 return BTM_NO_RESOURCES; 172 } 173 174 /******************************************************************************* 175 ** 176 ** Function BTM_SetPowerMode 177 ** 178 ** Description store the mode in control block or 179 ** alter ACL connection behavior. 180 ** 181 ** Returns BTM_SUCCESS if successful, 182 ** BTM_UNKNOWN_ADDR if bd addr is not active or bad 183 ** 184 *******************************************************************************/ 185 tBTM_STATUS BTM_SetPowerMode (UINT8 pm_id, BD_ADDR remote_bda, tBTM_PM_PWR_MD *p_mode) 186 { 187 UINT8 *p_features; 188 int ind, acl_ind; 189 tBTM_PM_MCB *p_cb = NULL; /* per ACL link */ 190 tBTM_PM_MODE mode; 191 int temp_pm_id; 192 193 194 if(pm_id >= BTM_MAX_PM_RECORDS) 195 pm_id = BTM_PM_SET_ONLY_ID; 196 197 if(p_mode == NULL) 198 return BTM_ILLEGAL_VALUE; 199 200 BTM_TRACE_API3( "BTM_SetPowerMode: pm_id %d BDA: %08x mode:0x%x", pm_id, 201 (remote_bda[2]<<24)+(remote_bda[3]<<16)+(remote_bda[4]<<8)+remote_bda[5], p_mode->mode); 202 203 /* take out the force bit */ 204 mode = p_mode->mode & ~BTM_PM_MD_FORCE; 205 206 acl_ind = btm_pm_find_acl_ind(remote_bda); 207 if(acl_ind == MAX_L2CAP_LINKS) 208 return (BTM_UNKNOWN_ADDR); 209 210 p_cb = &(btm_cb.pm_mode_db[acl_ind]); 211 212 if(mode != BTM_PM_MD_ACTIVE) 213 { 214 /* check if the requested mode is supported */ 215 ind = mode - BTM_PM_MD_HOLD; /* make it base 0 */ 216 p_features = BTM_ReadLocalFeatures(); 217 if( !(p_features[ btm_pm_mode_off[ind] ] & btm_pm_mode_msk[ind] ) ) 218 return BTM_MODE_UNSUPPORTED; 219 } 220 221 if(mode == p_cb->state) /* the requested mode is current mode */ 222 { 223 /* already in the requested mode and the current interval has less latency than the max */ 224 if( (mode == BTM_PM_MD_ACTIVE) || 225 ((p_mode->mode & BTM_PM_MD_FORCE) && (p_mode->max >= p_cb->interval) && (p_mode->min <= p_cb->interval)) || 226 ((p_mode->mode & BTM_PM_MD_FORCE)==0 && (p_mode->max >= p_cb->interval)) ) 227 { 228 BTM_TRACE_DEBUG4( "BTM_SetPowerMode: mode:0x%x interval %d max:%d, min:%d", p_mode->mode, p_cb->interval, p_mode->max, p_mode->min); 229 return BTM_SUCCESS; 230 } 231 } 232 233 temp_pm_id = pm_id; 234 if(pm_id == BTM_PM_SET_ONLY_ID) 235 temp_pm_id = BTM_MAX_PM_RECORDS; 236 237 /* update mode database */ 238 if( ((pm_id != BTM_PM_SET_ONLY_ID) && 239 (btm_cb.pm_reg_db[pm_id].mask & BTM_PM_REG_SET)) 240 || ((pm_id == BTM_PM_SET_ONLY_ID) && (btm_cb.pm_pend_link != MAX_L2CAP_LINKS)) ) 241 { 242 #if BTM_PM_DEBUG == TRUE 243 BTM_TRACE_DEBUG2( "BTM_SetPowerMode: Saving cmd acl_ind %d temp_pm_id %d", acl_ind,temp_pm_id); 244 #endif 245 /* Make sure mask is set to BTM_PM_REG_SET */ 246 btm_cb.pm_reg_db[temp_pm_id].mask |= BTM_PM_REG_SET; 247 *(&p_cb->req_mode[temp_pm_id]) = *((tBTM_PM_PWR_MD *)p_mode); 248 p_cb->chg_ind = TRUE; 249 } 250 251 #if BTM_PM_DEBUG == TRUE 252 BTM_TRACE_DEBUG2( "btm_pm state:0x%x, pm_pend_link: %d", p_cb->state, btm_cb.pm_pend_link); 253 #endif 254 /* if mode == hold or pending, return */ 255 if( (p_cb->state == BTM_PM_STS_HOLD) || 256 (p_cb->state == BTM_PM_STS_PENDING) || 257 (btm_cb.pm_pend_link != MAX_L2CAP_LINKS) ) /* command pending */ 258 { 259 if(acl_ind != btm_cb.pm_pend_link) 260 { 261 /* set the stored mask */ 262 p_cb->state |= BTM_PM_STORED_MASK; 263 BTM_TRACE_DEBUG1( "btm_pm state stored:%d",acl_ind); 264 } 265 return BTM_CMD_STORED; 266 } 267 268 269 270 return btm_pm_snd_md_req(pm_id, acl_ind, p_mode); 271 } 272 273 /******************************************************************************* 274 ** 275 ** Function BTM_ReadPowerMode 276 ** 277 ** Description This returns the current mode for a specific 278 ** ACL connection. 279 ** 280 ** Input Param remote_bda - device address of desired ACL connection 281 ** 282 ** Output Param p_mode - address where the current mode is copied into. 283 ** BTM_ACL_MODE_NORMAL 284 ** BTM_ACL_MODE_HOLD 285 ** BTM_ACL_MODE_SNIFF 286 ** BTM_ACL_MODE_PARK 287 ** (valid only if return code is BTM_SUCCESS) 288 ** 289 ** Returns BTM_SUCCESS if successful, 290 ** BTM_UNKNOWN_ADDR if bd addr is not active or bad 291 ** 292 *******************************************************************************/ 293 tBTM_STATUS BTM_ReadPowerMode (BD_ADDR remote_bda, tBTM_PM_MODE *p_mode) 294 { 295 int acl_ind; 296 297 if( (acl_ind = btm_pm_find_acl_ind(remote_bda)) == MAX_L2CAP_LINKS) 298 return (BTM_UNKNOWN_ADDR); 299 300 *p_mode = btm_cb.pm_mode_db[acl_ind].state; 301 return BTM_SUCCESS; 302 } 303 304 /******************************************************************************* 305 ** 306 ** Function BTM_SetSsrParams 307 ** 308 ** Description This sends the given SSR parameters for the given ACL 309 ** connection if it is in ACTIVE mode. 310 ** 311 ** Input Param remote_bda - device address of desired ACL connection 312 ** max_lat - maximum latency (in 0.625ms)(0-0xFFFE) 313 ** min_rmt_to - minimum remote timeout 314 ** min_loc_to - minimum local timeout 315 ** 316 ** 317 ** Returns BTM_SUCCESS if the HCI command is issued successful, 318 ** BTM_UNKNOWN_ADDR if bd addr is not active or bad 319 ** BTM_CMD_STORED if the command is stored 320 ** 321 *******************************************************************************/ 322 tBTM_STATUS BTM_SetSsrParams (BD_ADDR remote_bda, UINT16 max_lat, 323 UINT16 min_rmt_to, UINT16 min_loc_to) 324 { 325 #if (BTM_SSR_INCLUDED == TRUE) 326 int acl_ind; 327 tBTM_PM_MCB *p_cb; 328 329 if( (acl_ind = btm_pm_find_acl_ind(remote_bda)) == MAX_L2CAP_LINKS) 330 return (BTM_UNKNOWN_ADDR); 331 332 if(BTM_PM_STS_ACTIVE == btm_cb.pm_mode_db[acl_ind].state || 333 BTM_PM_STS_SNIFF == btm_cb.pm_mode_db[acl_ind].state) 334 { 335 if (btsnd_hcic_sniff_sub_rate(btm_cb.acl_db[acl_ind].hci_handle, max_lat, 336 min_rmt_to, min_loc_to)) 337 return BTM_SUCCESS; 338 else 339 return BTM_NO_RESOURCES; 340 } 341 p_cb = &btm_cb.pm_mode_db[acl_ind]; 342 p_cb->max_lat = max_lat; 343 p_cb->min_rmt_to = min_rmt_to; 344 p_cb->min_loc_to = min_loc_to; 345 return BTM_CMD_STORED; 346 #else 347 return BTM_ILLEGAL_ACTION; 348 #endif 349 } 350 351 /******************************************************************************* 352 ** 353 ** Function btm_pm_reset 354 ** 355 ** Description as a part of the BTM reset process. 356 ** 357 ** Returns void 358 ** 359 *******************************************************************************/ 360 void btm_pm_reset(void) 361 { 362 int xx; 363 tBTM_PM_STATUS_CBACK *cb = NULL; 364 365 /* clear the pending request for application */ 366 if( (btm_cb.pm_pend_id != BTM_PM_SET_ONLY_ID) && 367 (btm_cb.pm_reg_db[btm_cb.pm_pend_id].mask & BTM_PM_REG_NOTIF) ) 368 { 369 cb = btm_cb.pm_reg_db[btm_cb.pm_pend_id].cback; 370 } 371 372 /* no command pending */ 373 btm_cb.pm_pend_link = MAX_L2CAP_LINKS; 374 375 /* clear the register record */ 376 for(xx=0; xx<BTM_MAX_PM_RECORDS; xx++) 377 { 378 btm_cb.pm_reg_db[xx].mask = BTM_PM_REC_NOT_USED; 379 } 380 381 if(cb != NULL) 382 (*cb)(btm_cb.acl_db[btm_cb.pm_pend_link].remote_addr, BTM_PM_STS_ERROR, BTM_DEV_RESET, 0); 383 } 384 385 /******************************************************************************* 386 ** 387 ** Function btm_pm_sm_alloc 388 ** 389 ** Description This function initializes the control block of an ACL link. 390 ** It is called when an ACL connection is created. 391 ** 392 ** Returns void 393 ** 394 *******************************************************************************/ 395 void btm_pm_sm_alloc(UINT8 ind) 396 { 397 tBTM_PM_MCB *p_db = &btm_cb.pm_mode_db[ind]; /* per ACL link */ 398 memset (p_db, 0, sizeof(tBTM_PM_MCB)); 399 p_db->state = BTM_PM_ST_ACTIVE; 400 #if BTM_PM_DEBUG == TRUE 401 BTM_TRACE_DEBUG2( "btm_pm_sm_alloc ind:%d st:%d", ind, p_db->state); 402 #endif 403 } 404 405 /******************************************************************************* 406 ** 407 ** Function btm_pm_find_acl_ind 408 ** 409 ** Description This function initializes the control block of an ACL link. 410 ** It is called when an ACL connection is created. 411 ** 412 ** Returns void 413 ** 414 *******************************************************************************/ 415 static int btm_pm_find_acl_ind(BD_ADDR remote_bda) 416 { 417 tACL_CONN *p = &btm_cb.acl_db[0]; 418 UINT8 xx; 419 420 for (xx = 0; xx < MAX_L2CAP_LINKS; xx++, p++) 421 { 422 if ((p->in_use) && (!memcmp (p->remote_addr, remote_bda, BD_ADDR_LEN))) 423 { 424 #if BTM_PM_DEBUG == TRUE 425 BTM_TRACE_DEBUG2( "btm_pm_find_acl_ind ind:%d, st:%d", xx, btm_cb.pm_mode_db[xx].state); 426 #endif 427 break; 428 } 429 } 430 return xx; 431 } 432 433 /******************************************************************************* 434 ** 435 ** Function btm_pm_compare_modes 436 ** Description get the "more active" mode of the 2 437 ** Returns void 438 ** 439 *******************************************************************************/ 440 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) 441 { 442 UINT8 res; 443 444 if(p_md1 == NULL) 445 { 446 *p_res = *p_md2; 447 p_res->mode &= ~BTM_PM_MD_FORCE; 448 449 return p_md2; 450 } 451 452 if(p_md2->mode == BTM_PM_MD_ACTIVE || p_md1->mode == BTM_PM_MD_ACTIVE) 453 { 454 return NULL; 455 } 456 457 /* check if force bit is involved */ 458 if(p_md1->mode & BTM_PM_MD_FORCE) 459 { 460 *p_res = *p_md1; 461 p_res->mode &= ~BTM_PM_MD_FORCE; 462 return p_res; 463 } 464 465 if(p_md2->mode & BTM_PM_MD_FORCE) 466 { 467 *p_res = *p_md2; 468 p_res->mode &= ~BTM_PM_MD_FORCE; 469 return p_res; 470 } 471 472 res = (p_md1->mode - 1) * BTM_PM_NUM_SET_MODES + (p_md2->mode - 1); 473 res = btm_pm_md_comp_matrix[res]; 474 switch(res) 475 { 476 case BTM_PM_GET_MD1: 477 *p_res = *p_md1; 478 return p_md1; 479 480 case BTM_PM_GET_MD2: 481 *p_res = *p_md2; 482 return p_md2; 483 484 case BTM_PM_GET_COMP: 485 p_res->mode = p_md1->mode; 486 /* min of the two */ 487 p_res->max = (p_md1->max < p_md2->max)? (p_md1->max) : (p_md2->max); 488 /* max of the two */ 489 p_res->min = (p_md1->min > p_md2->min)? (p_md1->min) : (p_md2->min); 490 491 /* the intersection is NULL */ 492 if( p_res->max < p_res->min) 493 return NULL; 494 495 if(p_res->mode == BTM_PM_MD_SNIFF) 496 { 497 /* max of the two */ 498 p_res->attempt = (p_md1->attempt > p_md2->attempt)? (p_md1->attempt) : (p_md2->attempt); 499 p_res->timeout = (p_md1->timeout > p_md2->timeout)? (p_md1->timeout) : (p_md2->timeout); 500 } 501 return p_res; 502 } 503 return NULL; 504 } 505 506 /******************************************************************************* 507 ** 508 ** Function btm_pm_get_set_mode 509 ** Description get the resulting mode from the registered parties, then compare it 510 ** with the requested mode, if the command is from an unregistered party. 511 ** Returns void 512 ** 513 *******************************************************************************/ 514 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) 515 { 516 int xx, loop_max; 517 tBTM_PM_PWR_MD *p_md = NULL; 518 519 if(p_mode != NULL && p_mode->mode & BTM_PM_MD_FORCE) 520 { 521 *p_res = *p_mode; 522 p_res->mode &= ~BTM_PM_MD_FORCE; 523 return p_res->mode; 524 } 525 526 if(!p_mode) 527 loop_max = BTM_MAX_PM_RECORDS+1; 528 else 529 loop_max = BTM_MAX_PM_RECORDS; 530 531 for( xx=0; xx<loop_max; xx++) 532 { 533 /* g through all the registered "set" parties */ 534 if(btm_cb.pm_reg_db[xx].mask & BTM_PM_REG_SET) 535 { 536 if(p_cb->req_mode[xx].mode == BTM_PM_MD_ACTIVE) 537 { 538 /* if at least one registered (SET) party says ACTIVE, stay active */ 539 return BTM_PM_MD_ACTIVE; 540 } 541 else 542 { 543 /* if registered parties give conflicting information, stay active */ 544 if( (btm_pm_compare_modes(p_md, &p_cb->req_mode[xx], p_res)) == NULL) 545 return BTM_PM_MD_ACTIVE; 546 p_md = p_res; 547 } 548 } 549 } 550 551 /* if the resulting mode is NULL(nobody registers SET), use the requested mode */ 552 if(p_md == NULL) 553 { 554 if(p_mode) 555 *p_res = *((tBTM_PM_PWR_MD *)p_mode); 556 else /* p_mode is NULL when btm_pm_snd_md_req is called from btm_pm_proc_mode_change */ 557 return BTM_PM_MD_ACTIVE; 558 } 559 else 560 { 561 /* if the command is from unregistered party, 562 compare the resulting mode from registered party*/ 563 if( (pm_id == BTM_PM_SET_ONLY_ID) && 564 ((btm_pm_compare_modes(p_mode, p_md, p_res)) == NULL) ) 565 return BTM_PM_MD_ACTIVE; 566 } 567 568 return p_res->mode; 569 } 570 571 /******************************************************************************* 572 ** 573 ** Function btm_pm_snd_md_req 574 ** Description get the resulting mode and send the resuest to host controller 575 ** Returns tBTM_STATUS 576 **, BOOLEAN *p_chg_ind 577 *******************************************************************************/ 578 static tBTM_STATUS btm_pm_snd_md_req(UINT8 pm_id, int link_ind, tBTM_PM_PWR_MD *p_mode) 579 { 580 tBTM_PM_PWR_MD md_res; 581 tBTM_PM_MODE mode; 582 tBTM_PM_MCB *p_cb = &btm_cb.pm_mode_db[link_ind]; 583 BOOLEAN chg_ind = FALSE; 584 585 mode = btm_pm_get_set_mode(pm_id, p_cb, p_mode, &md_res); 586 md_res.mode = mode; 587 588 #if BTM_PM_DEBUG == TRUE 589 BTM_TRACE_DEBUG2( "btm_pm_snd_md_req link_ind:%d, mode: %d", 590 link_ind, mode); 591 #endif 592 593 if( p_cb->state == mode) 594 { 595 /* already in the resulting mode */ 596 if( (mode == BTM_PM_MD_ACTIVE) || 597 ((md_res.max >= p_cb->interval) && (md_res.min <= p_cb->interval)) ) 598 return BTM_CMD_STORED; 599 /* Otherwise, needs to wake, then sleep */ 600 chg_ind = TRUE; 601 } 602 p_cb->chg_ind = chg_ind; 603 604 /* cannot go directly from current mode to resulting mode. */ 605 if( mode != BTM_PM_MD_ACTIVE && p_cb->state != BTM_PM_MD_ACTIVE) 606 p_cb->chg_ind = TRUE; /* needs to wake, then sleep */ 607 608 if(p_cb->chg_ind == TRUE) /* needs to wake first */ 609 md_res.mode = BTM_PM_MD_ACTIVE; 610 #if (BTM_SSR_INCLUDED == TRUE) 611 else if(BTM_PM_MD_SNIFF == md_res.mode && p_cb->max_lat) 612 { 613 btsnd_hcic_sniff_sub_rate(btm_cb.acl_db[link_ind].hci_handle, p_cb->max_lat, 614 p_cb->min_rmt_to, p_cb->min_loc_to); 615 p_cb->max_lat = 0; 616 } 617 #endif 618 /* Default is failure */ 619 btm_cb.pm_pend_link = MAX_L2CAP_LINKS; 620 621 /* send the appropriate HCI command */ 622 btm_cb.pm_pend_id = pm_id; 623 624 #if BTM_PM_DEBUG == TRUE 625 BTM_TRACE_DEBUG2("btm_pm_snd_md_req state:0x%x, link_ind: %d", p_cb->state, link_ind); 626 #endif 627 switch(md_res.mode) 628 { 629 case BTM_PM_MD_ACTIVE: 630 switch(p_cb->state) 631 { 632 case BTM_PM_MD_SNIFF: 633 if (btsnd_hcic_exit_sniff_mode(btm_cb.acl_db[link_ind].hci_handle)) 634 { 635 btm_cb.pm_pend_link = link_ind; 636 } 637 break; 638 case BTM_PM_MD_PARK: 639 if (btsnd_hcic_exit_park_mode(btm_cb.acl_db[link_ind].hci_handle)) 640 { 641 btm_cb.pm_pend_link = link_ind; 642 } 643 break; 644 default: 645 /* Failure btm_cb.pm_pend_link = MAX_L2CAP_LINKS */ 646 break; 647 } 648 break; 649 650 case BTM_PM_MD_HOLD: 651 if (btsnd_hcic_hold_mode (btm_cb.acl_db[link_ind].hci_handle, 652 md_res.max, md_res.min)) 653 { 654 btm_cb.pm_pend_link = link_ind; 655 } 656 break; 657 658 case BTM_PM_MD_SNIFF: 659 if (btsnd_hcic_sniff_mode (btm_cb.acl_db[link_ind].hci_handle, 660 md_res.max, md_res.min, md_res.attempt, 661 md_res.timeout)) 662 { 663 btm_cb.pm_pend_link = link_ind; 664 } 665 break; 666 667 case BTM_PM_MD_PARK: 668 if (btsnd_hcic_park_mode (btm_cb.acl_db[link_ind].hci_handle, 669 md_res.max, md_res.min)) 670 { 671 btm_cb.pm_pend_link = link_ind; 672 } 673 break; 674 default: 675 /* Failure btm_cb.pm_pend_link = MAX_L2CAP_LINKS */ 676 break; 677 } 678 679 if(btm_cb.pm_pend_link == MAX_L2CAP_LINKS) 680 { 681 /* the command was not sent */ 682 #if BTM_PM_DEBUG == TRUE 683 BTM_TRACE_DEBUG1( "pm_pend_link: %d",btm_cb.pm_pend_link); 684 #endif 685 return (BTM_NO_RESOURCES); 686 } 687 688 return BTM_CMD_STARTED; 689 } 690 691 /******************************************************************************* 692 ** 693 ** Function btm_pm_check_stored 694 ** 695 ** Description This function is called when an HCI command status event occurs 696 ** to check if there's any PM command issued while waiting for 697 ** HCI command status. 698 ** 699 ** Returns none. 700 ** 701 *******************************************************************************/ 702 static void btm_pm_check_stored(void) 703 { 704 int xx; 705 for(xx=0; xx<MAX_L2CAP_LINKS; xx++) 706 { 707 if(btm_cb.pm_mode_db[xx].state & BTM_PM_STORED_MASK) 708 { 709 btm_cb.pm_mode_db[xx].state &= ~BTM_PM_STORED_MASK; 710 BTM_TRACE_DEBUG1( "btm_pm_check_stored :%d", xx); 711 btm_pm_snd_md_req(BTM_PM_SET_ONLY_ID, xx, NULL); 712 break; 713 } 714 } 715 } 716 717 718 /******************************************************************************* 719 ** 720 ** Function btm_pm_proc_cmd_status 721 ** 722 ** Description This function is called when an HCI command status event occurs 723 ** for power manager related commands. 724 ** 725 ** Input Parms status - status of the event (HCI_SUCCESS if no errors) 726 ** 727 ** Returns none. 728 ** 729 *******************************************************************************/ 730 void btm_pm_proc_cmd_status(UINT8 status) 731 { 732 tBTM_PM_MCB *p_cb; 733 tBTM_PM_STATUS pm_status; 734 735 if(btm_cb.pm_pend_link >= MAX_L2CAP_LINKS) 736 return; 737 738 p_cb = &btm_cb.pm_mode_db[btm_cb.pm_pend_link]; 739 740 if(status == HCI_SUCCESS) 741 { 742 p_cb->state = BTM_PM_ST_PENDING; 743 pm_status = BTM_PM_STS_PENDING; 744 #if BTM_PM_DEBUG == TRUE 745 BTM_TRACE_DEBUG1( "btm_pm_proc_cmd_status new state:0x%x", p_cb->state); 746 #endif 747 } 748 else /* the command was not successfull. Stay in the same state */ 749 { 750 pm_status = BTM_PM_STS_ERROR; 751 } 752 753 /* notify the caller is appropriate */ 754 if( (btm_cb.pm_pend_id != BTM_PM_SET_ONLY_ID) && 755 (btm_cb.pm_reg_db[btm_cb.pm_pend_id].mask & BTM_PM_REG_NOTIF) ) 756 { 757 (*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); 758 } 759 760 /* no pending cmd now */ 761 #if BTM_PM_DEBUG == TRUE 762 BTM_TRACE_DEBUG3( "btm_pm_proc_cmd_status state:0x%x, pm_pend_link: %d(new: %d)", 763 p_cb->state, btm_cb.pm_pend_link, MAX_L2CAP_LINKS); 764 #endif 765 btm_cb.pm_pend_link = MAX_L2CAP_LINKS; 766 767 btm_pm_check_stored(); 768 } 769 770 /******************************************************************************* 771 ** 772 ** Function btm_process_mode_change 773 ** 774 ** Description This function is called when an HCI mode change event occurs. 775 ** 776 ** Input Parms hci_status - status of the event (HCI_SUCCESS if no errors) 777 ** hci_handle - connection handle associated with the change 778 ** mode - HCI_MODE_ACTIVE, HCI_MODE_HOLD, HCI_MODE_SNIFF, or HCI_MODE_PARK 779 ** interval - number of baseband slots (meaning depends on mode) 780 ** 781 ** Returns none. 782 ** 783 *******************************************************************************/ 784 void btm_pm_proc_mode_change (UINT8 hci_status, UINT16 hci_handle, UINT8 mode, UINT16 interval) 785 { 786 tACL_CONN *p; 787 tBTM_PM_MCB *p_cb = NULL; 788 int xx, yy, zz; 789 tBTM_PM_STATE old_state; 790 tL2C_LCB *p_lcb; 791 792 /* get the index to acl_db */ 793 if ((xx = btm_handle_to_acl_index(hci_handle)) >= MAX_L2CAP_LINKS) 794 return; 795 796 p = &btm_cb.acl_db[xx]; 797 798 /*** 2035 and 2045 work around: If mode is active and coming out of a SCO disconnect, restore packet types ***/ 799 if (mode == HCI_MODE_ACTIVE) 800 { 801 if(BTM_GetNumScoLinks() == 0) 802 { 803 if(p->restore_pkt_types) 804 { 805 BTM_TRACE_DEBUG3("btm mode change AFTER unsniffing; hci hdl 0x%x, types 0x%02x/0x%02x", 806 hci_handle, p->pkt_types_mask, p->restore_pkt_types); 807 p->pkt_types_mask = p->restore_pkt_types; 808 p->restore_pkt_types = 0; /* Only exists while SCO is active */ 809 btsnd_hcic_change_conn_type (p->hci_handle, p->pkt_types_mask); 810 } 811 #if (BTM_PM_SNIFF_SLOT_WORK_AROUND == TRUE) 812 else 813 { 814 BTM_TRACE_DEBUG2("btm mode change AFTER unsniffing; hci hdl 0x%x, types 0x%02x", 815 hci_handle, btm_cb.btm_acl_pkt_types_supported); 816 btm_set_packet_types (p, btm_cb.btm_acl_pkt_types_supported); 817 } 818 #endif 819 } 820 #if (BTM_PM_SNIFF_SLOT_WORK_AROUND == TRUE) 821 else 822 { 823 /* Mode changed from Sniff to Active while SCO is open. */ 824 /* Packet types of active mode, not sniff mode, should be used for ACL when SCO is closed. */ 825 p->restore_pkt_types = btm_cb.btm_acl_pkt_types_supported; 826 827 /* Exclude packet types not supported by the peer */ 828 btm_acl_chk_peer_pkt_type_support (p, &p->restore_pkt_types); 829 } 830 #endif 831 } 832 #if (BTM_PM_SNIFF_SLOT_WORK_AROUND == TRUE) 833 else if (mode == HCI_MODE_SNIFF) 834 { 835 BTM_TRACE_DEBUG1("btm mode change to sniff; hci hdl 0x%x use single slot", 836 hci_handle); 837 btm_set_packet_types (p, (HCI_PKT_TYPES_MASK_DM1 | HCI_PKT_TYPES_MASK_DH1)); 838 } 839 #endif 840 841 /* update control block */ 842 p_cb = &(btm_cb.pm_mode_db[xx]); 843 old_state = p_cb->state; 844 p_cb->state = mode; 845 p_cb->interval = interval; 846 #if BTM_PM_DEBUG == TRUE 847 BTM_TRACE_DEBUG2( "btm_pm_proc_mode_change new state:0x%x (old:0x%x)", p_cb->state, old_state); 848 #endif 849 850 if ((p_cb->state == HCI_MODE_ACTIVE) && 851 ((p_lcb = l2cu_find_lcb_by_bd_addr (p->remote_addr)) != NULL)) 852 { 853 /* There might be any pending packets due to SNIFF or PENDING state */ 854 /* Trigger L2C to start transmission of the pending packets. */ 855 BTM_TRACE_DEBUG0 ("btm mode change to active; check l2c_link for outgoing packets"); 856 l2c_link_check_send_pkts (p_lcb, NULL, NULL); 857 858 //btu_stop_timer (&p_lcb->timer_entry); 859 } 860 861 /* notify registered parties */ 862 for(yy=0; yy<=BTM_MAX_PM_RECORDS; yy++) 863 { 864 /* set req_mode HOLD mode->ACTIVE */ 865 if( (mode == BTM_PM_MD_ACTIVE) && (p_cb->req_mode[yy].mode == BTM_PM_MD_HOLD) ) 866 p_cb->req_mode[yy].mode = BTM_PM_MD_ACTIVE; 867 } 868 869 /* new request has been made. - post a message to BTU task */ 870 if(old_state & BTM_PM_STORED_MASK) 871 { 872 #if BTM_PM_DEBUG == TRUE 873 BTM_TRACE_DEBUG1( "btm_pm_proc_mode_change: Sending stored req:%d", xx); 874 #endif 875 btm_pm_snd_md_req(BTM_PM_SET_ONLY_ID, xx, NULL); 876 } 877 else 878 { 879 for(zz=0; zz<MAX_L2CAP_LINKS; zz++) 880 { 881 if(btm_cb.pm_mode_db[zz].chg_ind == TRUE) 882 { 883 #if BTM_PM_DEBUG == TRUE 884 BTM_TRACE_DEBUG1( "btm_pm_proc_mode_change: Sending PM req :%d", zz); 885 #endif 886 btm_pm_snd_md_req(BTM_PM_SET_ONLY_ID, zz, NULL); 887 break; 888 } 889 } 890 } 891 892 893 /* notify registered parties */ 894 for(yy=0; yy<BTM_MAX_PM_RECORDS; yy++) 895 { 896 if(btm_cb.pm_reg_db[yy].mask & BTM_PM_REG_NOTIF) 897 { 898 (*btm_cb.pm_reg_db[yy].cback)( p->remote_addr, mode, interval, hci_status); 899 } 900 } 901 902 /* If mode change was because of an active role switch or change link key */ 903 btm_cont_rswitch_or_chglinkkey(p, btm_find_dev(p->remote_addr), hci_status); 904 } 905 906 /******************************************************************************* 907 ** 908 ** Function btm_pm_proc_ssr_evt 909 ** 910 ** Description This function is called when an HCI sniff subrating event occurs. 911 ** 912 ** Returns none. 913 ** 914 *******************************************************************************/ 915 #if (BTM_SSR_INCLUDED == TRUE) 916 void btm_pm_proc_ssr_evt (UINT8 *p, UINT16 evt_len) 917 { 918 UINT8 status; 919 UINT16 handle; 920 UINT16 max_tx_lat, max_rx_lat; 921 int xx, yy; 922 tBTM_PM_MCB *p_cb; 923 tACL_CONN *p_acl=NULL; 924 UINT16 use_ssr = TRUE; 925 926 STREAM_TO_UINT8 (status, p); 927 928 STREAM_TO_UINT16 (handle, p); 929 /* get the index to acl_db */ 930 if ((xx = btm_handle_to_acl_index(handle)) >= MAX_L2CAP_LINKS) 931 return; 932 933 STREAM_TO_UINT16 (max_tx_lat, p); 934 STREAM_TO_UINT16 (max_rx_lat, p); 935 p_cb = &(btm_cb.pm_mode_db[xx]); 936 937 p_acl = &btm_cb.acl_db[xx]; 938 if(p_cb->interval == max_rx_lat) 939 { 940 /* using legacy sniff */ 941 use_ssr = FALSE; 942 } 943 944 /* notify registered parties */ 945 for(yy=0; yy<BTM_MAX_PM_RECORDS; yy++) 946 { 947 if(btm_cb.pm_reg_db[yy].mask & BTM_PM_REG_NOTIF) 948 { 949 if( p_acl) 950 { 951 (*btm_cb.pm_reg_db[yy].cback)( p_acl->remote_addr, BTM_PM_STS_SSR, use_ssr, status); 952 } 953 } 954 } 955 } 956 #endif 957 #else /* BTM_PWR_MGR_INCLUDED == TRUE */ 958 959 /******************************************************************************* 960 ** 961 ** Functions BTM_PmRegister, BTM_SetPowerMode, and BTM_ReadPowerMode 962 ** 963 ** Description Stubbed versions for BTM_PWR_MGR_INCLUDED = FALSE 964 ** 965 ** Returns BTM_MODE_UNSUPPORTED. 966 ** 967 *******************************************************************************/ 968 tBTM_STATUS BTM_PmRegister (UINT8 mask, UINT8 *p_pm_id, tBTM_PM_STATUS_CBACK *p_cb) 969 { 970 return BTM_MODE_UNSUPPORTED; 971 } 972 973 tBTM_STATUS BTM_SetPowerMode (UINT8 pm_id, BD_ADDR remote_bda, tBTM_PM_PWR_MD *p_mode) 974 { 975 return BTM_MODE_UNSUPPORTED; 976 } 977 978 tBTM_STATUS BTM_ReadPowerMode (BD_ADDR remote_bda, tBTM_PM_MODE *p_mode) 979 { 980 return BTM_MODE_UNSUPPORTED; 981 } 982 983 #endif 984 985 /******************************************************************************* 986 ** 987 ** Function BTM_IsPowerManagerOn 988 ** 989 ** Description This function is called to check if power manager is included. 990 ** in the BTE version. 991 ** 992 ** Returns BTM_PWR_MGR_INCLUDED. 993 ** 994 *******************************************************************************/ 995 BOOLEAN BTM_IsPowerManagerOn (void) 996 { 997 return BTM_PWR_MGR_INCLUDED; 998 } 999
