/****************************************************************************** * * Copyright (C) 2000-2012 Broadcom Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ******************************************************************************/ /***************************************************************************** * * This file contains functions that manages ACL link modes. * This includes operations such as active, hold, * park and sniff modes. * * This module contains both internal and external (API) * functions. External (API) functions are distinguishable * by their names beginning with uppercase BTM. * *****************************************************************************/ //#define LOG_TAG "bt_btm_pm" #include #include //#include #include #include "stack/bt_types.h" #include "stack/hcimsgs.h" #include "stack/btu.h" #include "stack/btm_api.h" #include "btm_int.h" #include "l2c_int.h" #include "stack/hcidefs.h" //#include "bt_utils.h" //#include "osi/include/log.h" #include "osi/allocator.h" #if (CLASSIC_BT_INCLUDED == TRUE) /*****************************************************************************/ /* to handle different modes */ /*****************************************************************************/ #define BTM_PM_STORED_MASK 0x80 /* set this mask if the command is stored */ #define BTM_PM_NUM_SET_MODES 3 /* only hold, sniff & park */ /* Usage: (ptr_features[ offset ] & mask )?TRUE:FALSE */ /* offset to supported feature */ const UINT8 btm_pm_mode_off[BTM_PM_NUM_SET_MODES] = {0, 0, 1}; /* mask to supported feature */ const UINT8 btm_pm_mode_msk[BTM_PM_NUM_SET_MODES] = {0x40, 0x80, 0x01}; #define BTM_PM_GET_MD1 1 #define BTM_PM_GET_MD2 2 #define BTM_PM_GET_COMP 3 const UINT8 btm_pm_md_comp_matrix[BTM_PM_NUM_SET_MODES * BTM_PM_NUM_SET_MODES] = { BTM_PM_GET_COMP, BTM_PM_GET_MD2, BTM_PM_GET_MD2, BTM_PM_GET_MD1, BTM_PM_GET_COMP, BTM_PM_GET_MD1, BTM_PM_GET_MD1, BTM_PM_GET_MD2, BTM_PM_GET_COMP }; /* function prototype */ static tBTM_STATUS btm_pm_snd_md_req( UINT8 pm_id, UINT16 link_hdl, tBTM_PM_PWR_MD *p_mode ); #if (!CONFIG_BT_STACK_NO_LOG) static const char *mode_to_string(tBTM_PM_MODE mode); #endif /* #ifdef BTM_PM_DEBUG #undef BTM_PM_DEBUG #define BTM_PM_DEBUG TRUE #endif */ #if BTM_PM_DEBUG == TRUE const char *btm_pm_state_str[] = { "pm_active_state", "pm_hold_state", "pm_sniff_state", "pm_park_state", "pm_pend_state" }; const char *btm_pm_event_str[] = { "pm_set_mode_event", "pm_hci_sts_event", "pm_mod_chg_event", "pm_update_event" }; const char *btm_pm_action_str[] = { "pm_set_mode_action", "pm_update_db_action", "pm_mod_chg_action", "pm_hci_sts_action", "pm_update_action" }; #endif // BTM_PM_DEBUG /*****************************************************************************/ /* P U B L I C F U N C T I O N S */ /*****************************************************************************/ /******************************************************************************* ** ** Function BTM_PmRegister ** ** Description register or deregister with power manager ** ** Returns BTM_SUCCESS if successful, ** BTM_NO_RESOURCES if no room to hold registration ** BTM_ILLEGAL_VALUE ** *******************************************************************************/ tBTM_STATUS BTM_PmRegister (UINT8 mask, UINT8 *p_pm_id, tBTM_PM_STATUS_CBACK *p_cb) { int xx; /* de-register */ if (mask & BTM_PM_DEREG) { if (*p_pm_id >= BTM_MAX_PM_RECORDS) { return BTM_ILLEGAL_VALUE; } btm_cb.pm_reg_db[*p_pm_id].mask = BTM_PM_REC_NOT_USED; return BTM_SUCCESS; } for (xx = 0; xx < BTM_MAX_PM_RECORDS; xx++) { /* find an unused entry */ if (btm_cb.pm_reg_db[xx].mask == BTM_PM_REC_NOT_USED) { /* if register for notification, should provide callback routine */ if (mask & BTM_PM_REG_NOTIF) { if (p_cb == NULL) { return BTM_ILLEGAL_VALUE; } btm_cb.pm_reg_db[xx].cback = p_cb; } btm_cb.pm_reg_db[xx].mask = mask; *p_pm_id = xx; return BTM_SUCCESS; } } return BTM_NO_RESOURCES; } /******************************************************************************* ** ** Function BTM_SetPowerMode ** ** Description store the mode in control block or ** alter ACL connection behavior. ** ** Returns BTM_SUCCESS if successful, ** BTM_UNKNOWN_ADDR if bd addr is not active or bad ** *******************************************************************************/ tBTM_STATUS BTM_SetPowerMode (UINT8 pm_id, BD_ADDR remote_bda, tBTM_PM_PWR_MD *p_mode) { UINT8 *p_features; int ind; tBTM_PM_MCB *p_cb = NULL; /* per ACL link */ tBTM_PM_MODE mode; int temp_pm_id; tACL_CONN *p_acl_cb; if (pm_id >= BTM_MAX_PM_RECORDS) { pm_id = BTM_PM_SET_ONLY_ID; } if (p_mode == NULL) { return BTM_ILLEGAL_VALUE; } BTM_TRACE_API( "BTM_SetPowerMode: pm_id %d BDA: %08x mode:0x%x", pm_id, (remote_bda[2] << 24) + (remote_bda[3] << 16) + (remote_bda[4] << 8) + remote_bda[5], p_mode->mode); /* take out the force bit */ mode = p_mode->mode & ~BTM_PM_MD_FORCE; p_acl_cb = btm_bda_to_acl(remote_bda, BT_TRANSPORT_BR_EDR); if (p_acl_cb == NULL){ return BTM_UNKNOWN_ADDR; } p_cb = p_acl_cb->p_pm_mode_db; if (mode != BTM_PM_MD_ACTIVE) { /* check if the requested mode is supported */ ind = mode - BTM_PM_MD_HOLD; /* make it base 0 */ p_features = BTM_ReadLocalFeatures(); if ( !(p_features[ btm_pm_mode_off[ind] ] & btm_pm_mode_msk[ind] ) ) { return BTM_MODE_UNSUPPORTED; } } if (mode == p_cb->state) { /* the requested mode is current mode */ /* already in the requested mode and the current interval has less latency than the max */ if ( (mode == BTM_PM_MD_ACTIVE) || ((p_mode->mode & BTM_PM_MD_FORCE) && (p_mode->max >= p_cb->interval) && (p_mode->min <= p_cb->interval)) || ((p_mode->mode & BTM_PM_MD_FORCE) == 0 && (p_mode->max >= p_cb->interval)) ) { 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); return BTM_SUCCESS; } } temp_pm_id = pm_id; if (pm_id == BTM_PM_SET_ONLY_ID) { temp_pm_id = BTM_MAX_PM_RECORDS; } /* update mode database */ if ( ((pm_id != BTM_PM_SET_ONLY_ID) && (btm_cb.pm_reg_db[pm_id].mask & BTM_PM_REG_SET)) || ((pm_id == BTM_PM_SET_ONLY_ID) && (btm_cb.pm_pend_link_hdl != BTM_INVALID_HANDLE)) ) { #if BTM_PM_DEBUG == TRUE BTM_TRACE_DEBUG( "BTM_SetPowerMode: Saving cmd acl handle %d temp_pm_id %d", p_acl_cb->hci_handle, temp_pm_id); #endif // BTM_PM_DEBUG /* Make sure mask is set to BTM_PM_REG_SET */ btm_cb.pm_reg_db[temp_pm_id].mask |= BTM_PM_REG_SET; *(&p_cb->req_mode[temp_pm_id]) = *((tBTM_PM_PWR_MD *)p_mode); p_cb->chg_ind = TRUE; } #if BTM_PM_DEBUG == TRUE BTM_TRACE_DEBUG( "btm_pm state:0x%x, pm_pend_link_hdl: %d", p_cb->state, btm_cb.pm_pend_link_hdl); #endif // BTM_PM_DEBUG /* if mode == hold or pending, return */ if ( (p_cb->state == BTM_PM_STS_HOLD) || (p_cb->state == BTM_PM_STS_PENDING) || (btm_cb.pm_pend_link_hdl != BTM_INVALID_HANDLE) || (p_cb->state & BTM_PM_STORED_MASK) ) { /* command pending */ if (p_acl_cb->hci_handle != btm_cb.pm_pend_link_hdl) { /* set the stored mask */ p_cb->state |= BTM_PM_STORED_MASK; BTM_TRACE_DEBUG( "btm_pm state stored:%d", p_acl_cb->hci_handle); } return BTM_CMD_STORED; } return btm_pm_snd_md_req(pm_id, p_acl_cb->hci_handle, p_mode); } /******************************************************************************* ** ** Function BTM_ReadPowerMode ** ** Description This returns the current mode for a specific ** ACL connection. ** ** Input Param remote_bda - device address of desired ACL connection ** ** Output Param p_mode - address where the current mode is copied into. ** BTM_ACL_MODE_NORMAL ** BTM_ACL_MODE_HOLD ** BTM_ACL_MODE_SNIFF ** BTM_ACL_MODE_PARK ** (valid only if return code is BTM_SUCCESS) ** ** Returns BTM_SUCCESS if successful, ** BTM_UNKNOWN_ADDR if bd addr is not active or bad ** *******************************************************************************/ tBTM_STATUS BTM_ReadPowerMode (BD_ADDR remote_bda, tBTM_PM_MODE *p_mode) { tACL_CONN *p_acl_cb = btm_bda_to_acl(remote_bda, BT_TRANSPORT_BR_EDR); if (!p_acl_cb) { return (BTM_UNKNOWN_ADDR); } *p_mode = p_acl_cb->p_pm_mode_db->state; return BTM_SUCCESS; } /******************************************************************************* ** ** Function BTM_SetSsrParams ** ** Description This sends the given SSR parameters for the given ACL ** connection if it is in ACTIVE mode. ** ** Input Param remote_bda - device address of desired ACL connection ** max_lat - maximum latency (in 0.625ms)(0-0xFFFE) ** min_rmt_to - minimum remote timeout ** min_loc_to - minimum local timeout ** ** ** Returns BTM_SUCCESS if the HCI command is issued successful, ** BTM_UNKNOWN_ADDR if bd addr is not active or bad ** BTM_CMD_STORED if the command is stored ** *******************************************************************************/ tBTM_STATUS BTM_SetSsrParams (BD_ADDR remote_bda, UINT16 max_lat, UINT16 min_rmt_to, UINT16 min_loc_to) { #if (BTM_SSR_INCLUDED == TRUE) tBTM_PM_MCB *p_cb; tACL_CONN *p_acl_cb = NULL; p_acl_cb = btm_bda_to_acl(remote_bda, BT_TRANSPORT_BR_EDR); if (!p_acl_cb) { return (BTM_UNKNOWN_ADDR); } p_cb = p_acl_cb->p_pm_mode_db; if (BTM_PM_STS_ACTIVE == p_cb->state || BTM_PM_STS_SNIFF == p_cb->state) { if (btsnd_hcic_sniff_sub_rate(p_acl_cb->hci_handle, max_lat, min_rmt_to, min_loc_to)) { return BTM_SUCCESS; } else { return BTM_NO_RESOURCES; } } p_cb->max_lat = max_lat; p_cb->min_rmt_to = min_rmt_to; p_cb->min_loc_to = min_loc_to; return BTM_CMD_STORED; #else return BTM_ILLEGAL_ACTION; #endif // BTM_SSR_INCLUDED } /******************************************************************************* ** ** Function btm_pm_reset ** ** Description as a part of the BTM reset process. ** ** Returns void ** *******************************************************************************/ void btm_pm_reset(void) { int xx; tBTM_PM_STATUS_CBACK *cb = NULL; /* clear the pending request for application */ if ( (btm_cb.pm_pend_id != BTM_PM_SET_ONLY_ID) && (btm_cb.pm_reg_db[btm_cb.pm_pend_id].mask & BTM_PM_REG_NOTIF) ) { cb = btm_cb.pm_reg_db[btm_cb.pm_pend_id].cback; } /* clear the register record */ for (xx = 0; xx < BTM_MAX_PM_RECORDS; xx++) { btm_cb.pm_reg_db[xx].mask = BTM_PM_REC_NOT_USED; } if (cb != NULL && btm_cb.pm_pend_link_hdl != BTM_INVALID_HANDLE) { (*cb)((btm_handle_to_acl(btm_cb.pm_pend_link_hdl))->remote_addr, BTM_PM_STS_ERROR, BTM_DEV_RESET, 0); } /* no command pending */ btm_cb.pm_pend_link_hdl = BTM_INVALID_HANDLE; } /******************************************************************************* ** ** Function btm_pm_sm_alloc ** ** Description This function initializes the control block of an ACL link. ** It is called when an ACL connection is created. ** ** Returns void ** *******************************************************************************/ tBTM_PM_MCB *btm_pm_sm_alloc(void) { tBTM_PM_MCB *p_db = (tBTM_PM_MCB *) osi_malloc(sizeof(tBTM_PM_MCB)); /* per ACL link */ if (p_db) { memset (p_db, 0, sizeof(tBTM_PM_MCB)); p_db->state = BTM_PM_ST_ACTIVE; if (list_length(btm_cb.p_pm_mode_db_list) >= MAX_L2CAP_LINKS) { osi_free(p_db); p_db = NULL; } if (!list_append(btm_cb.p_pm_mode_db_list, p_db)) { osi_free(p_db); p_db = NULL; } } return p_db; } /******************************************************************************* ** ** Function btm_pm_find_acl_ind ** ** Description This function initializes the control block of an ACL link. ** It is called when an ACL connection is created. ** ** Returns void ** *******************************************************************************/ /******************************************************************************* ** ** Function btm_pm_compare_modes ** Description get the "more active" mode of the 2 ** Returns void ** *******************************************************************************/ 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) { UINT8 res; if (p_md1 == NULL) { *p_res = *p_md2; p_res->mode &= ~BTM_PM_MD_FORCE; return p_md2; } if (p_md2->mode == BTM_PM_MD_ACTIVE || p_md1->mode == BTM_PM_MD_ACTIVE) { return NULL; } /* check if force bit is involved */ if (p_md1->mode & BTM_PM_MD_FORCE) { *p_res = *p_md1; p_res->mode &= ~BTM_PM_MD_FORCE; return p_res; } if (p_md2->mode & BTM_PM_MD_FORCE) { *p_res = *p_md2; p_res->mode &= ~BTM_PM_MD_FORCE; return p_res; } res = (p_md1->mode - 1) * BTM_PM_NUM_SET_MODES + (p_md2->mode - 1); res = btm_pm_md_comp_matrix[res]; switch (res) { case BTM_PM_GET_MD1: *p_res = *p_md1; return p_md1; case BTM_PM_GET_MD2: *p_res = *p_md2; return p_md2; case BTM_PM_GET_COMP: p_res->mode = p_md1->mode; /* min of the two */ p_res->max = (p_md1->max < p_md2->max) ? (p_md1->max) : (p_md2->max); /* max of the two */ p_res->min = (p_md1->min > p_md2->min) ? (p_md1->min) : (p_md2->min); /* the intersection is NULL */ if ( p_res->max < p_res->min) { return NULL; } if (p_res->mode == BTM_PM_MD_SNIFF) { /* max of the two */ p_res->attempt = (p_md1->attempt > p_md2->attempt) ? (p_md1->attempt) : (p_md2->attempt); p_res->timeout = (p_md1->timeout > p_md2->timeout) ? (p_md1->timeout) : (p_md2->timeout); } return p_res; } return NULL; } /******************************************************************************* ** ** Function btm_pm_get_set_mode ** Description get the resulting mode from the registered parties, then compare it ** with the requested mode, if the command is from an unregistered party. ** Returns void ** *******************************************************************************/ 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) { int xx, loop_max; tBTM_PM_PWR_MD *p_md = NULL; if (p_mode != NULL && p_mode->mode & BTM_PM_MD_FORCE) { *p_res = *p_mode; p_res->mode &= ~BTM_PM_MD_FORCE; return p_res->mode; } if (!p_mode) { loop_max = BTM_MAX_PM_RECORDS + 1; } else { loop_max = BTM_MAX_PM_RECORDS; } for ( xx = 0; xx < loop_max; xx++) { /* g through all the registered "set" parties */ if (btm_cb.pm_reg_db[xx].mask & BTM_PM_REG_SET) { if (p_cb->req_mode[xx].mode == BTM_PM_MD_ACTIVE) { /* if at least one registered (SET) party says ACTIVE, stay active */ return BTM_PM_MD_ACTIVE; } else { /* if registered parties give conflicting information, stay active */ if ( (btm_pm_compare_modes(p_md, &p_cb->req_mode[xx], p_res)) == NULL) { return BTM_PM_MD_ACTIVE; } p_md = p_res; } } } /* if the resulting mode is NULL(nobody registers SET), use the requested mode */ if (p_md == NULL) { if (p_mode) { *p_res = *((tBTM_PM_PWR_MD *)p_mode); } else { /* p_mode is NULL when btm_pm_snd_md_req is called from btm_pm_proc_mode_change */ return BTM_PM_MD_ACTIVE; } } else { /* if the command is from unregistered party, compare the resulting mode from registered party*/ if ( (pm_id == BTM_PM_SET_ONLY_ID) && ((btm_pm_compare_modes(p_mode, p_md, p_res)) == NULL) ) { return BTM_PM_MD_ACTIVE; } } return p_res->mode; } /******************************************************************************* ** ** Function btm_pm_snd_md_req ** Description get the resulting mode and send the resuest to host controller ** Returns tBTM_STATUS ** *******************************************************************************/ static tBTM_STATUS btm_pm_snd_md_req(UINT8 pm_id, UINT16 link_hdl, tBTM_PM_PWR_MD *p_mode) { tBTM_PM_PWR_MD md_res; tBTM_PM_MODE mode; tACL_CONN *p_acl_cb = btm_handle_to_acl(link_hdl); tBTM_PM_MCB *p_cb = p_acl_cb->p_pm_mode_db; BOOLEAN chg_ind = FALSE; mode = btm_pm_get_set_mode(pm_id, p_cb, p_mode, &md_res); md_res.mode = mode; #if BTM_PM_DEBUG == TRUE BTM_TRACE_DEBUG( "btm_pm_snd_md_req link_hdl:%d, mode: %d", link_hdl, mode); #endif // BTM_PM_DEBUG if ( p_cb->state == mode) { /* already in the resulting mode */ if ( (mode == BTM_PM_MD_ACTIVE) || ((md_res.max >= p_cb->interval) && (md_res.min <= p_cb->interval)) ) { // Clear request change indication because already in result mode p_cb->chg_ind = FALSE; return BTM_CMD_STORED; } /* Otherwise, needs to wake, then sleep */ chg_ind = TRUE; } p_cb->chg_ind = chg_ind; /* cannot go directly from current mode to resulting mode. */ if ( mode != BTM_PM_MD_ACTIVE && p_cb->state != BTM_PM_MD_ACTIVE) { p_cb->chg_ind = TRUE; /* needs to wake, then sleep */ } if (p_cb->chg_ind == TRUE) { /* needs to wake first */ md_res.mode = BTM_PM_MD_ACTIVE; } #if (BTM_SSR_INCLUDED == TRUE) else if (BTM_PM_MD_SNIFF == md_res.mode && p_cb->max_lat) { btsnd_hcic_sniff_sub_rate(link_hdl, p_cb->max_lat, p_cb->min_rmt_to, p_cb->min_loc_to); p_cb->max_lat = 0; } #endif // BTM_SSR_INCLUDED /* Default is failure */ btm_cb.pm_pend_link_hdl = BTM_INVALID_HANDLE; /* send the appropriate HCI command */ btm_cb.pm_pend_id = pm_id; #if BTM_PM_DEBUG == TRUE BTM_TRACE_DEBUG("btm_pm_snd_md_req state:0x%x, link_hdl: %d", p_cb->state, link_hdl); #endif // BTM_PM_DEBUG BTM_TRACE_DEBUG("%s switching from %s to %s.", __func__, mode_to_string(p_cb->state), mode_to_string(md_res.mode)); switch (md_res.mode) { case BTM_PM_MD_ACTIVE: switch (p_cb->state) { case BTM_PM_MD_SNIFF: if (btsnd_hcic_exit_sniff_mode(link_hdl)) { btm_cb.pm_pend_link_hdl = link_hdl; } break; case BTM_PM_MD_PARK: if (btsnd_hcic_exit_park_mode(link_hdl)) { btm_cb.pm_pend_link_hdl = link_hdl; } break; default: /* Failure btm_cb.pm_pend_link = MAX_L2CAP_LINKS */ break; } break; case BTM_PM_MD_HOLD: if (btsnd_hcic_hold_mode (link_hdl, md_res.max, md_res.min)) { btm_cb.pm_pend_link_hdl = link_hdl; } break; case BTM_PM_MD_SNIFF: if (btsnd_hcic_sniff_mode (link_hdl, md_res.max, md_res.min, md_res.attempt, md_res.timeout)) { btm_cb.pm_pend_link_hdl = link_hdl; } break; case BTM_PM_MD_PARK: if (btsnd_hcic_park_mode (link_hdl, md_res.max, md_res.min)) { btm_cb.pm_pend_link_hdl = link_hdl; } break; default: /* Failure btm_cb.pm_pend_link = MAX_L2CAP_LINKS */ break; } if (btm_cb.pm_pend_link_hdl == BTM_INVALID_HANDLE) { /* the command was not sent */ #if BTM_PM_DEBUG == TRUE BTM_TRACE_DEBUG( "pm_pend_link_hdl: %d", btm_cb.pm_pend_link_hdl); #endif // BTM_PM_DEBUG return (BTM_NO_RESOURCES); } return BTM_CMD_STARTED; } /******************************************************************************* ** ** Function btm_pm_check_stored ** ** Description This function is called when an HCI command status event occurs ** to check if there's any PM command issued while waiting for ** HCI command status. ** ** Returns none. ** *******************************************************************************/ static void btm_pm_check_stored(void) { tACL_CONN *p_acl_cb = NULL; list_node_t *p_node = NULL; for (p_node = list_begin(btm_cb.p_acl_db_list); p_node; p_node = list_next(p_node)) { p_acl_cb = list_node(p_node); if (p_acl_cb->p_pm_mode_db->state & BTM_PM_STORED_MASK) { p_acl_cb->p_pm_mode_db->state &= ~BTM_PM_STORED_MASK; BTM_TRACE_DEBUG( "btm_pm_check_stored :%d", p_acl_cb->hci_handle); btm_pm_snd_md_req(BTM_PM_SET_ONLY_ID, p_acl_cb->hci_handle, NULL); break; } } } /******************************************************************************* ** ** Function btm_pm_proc_cmd_status ** ** Description This function is called when an HCI command status event occurs ** for power manager related commands. ** ** Input Params status - status of the event (HCI_SUCCESS if no errors) ** ** Returns none. ** *******************************************************************************/ void btm_pm_proc_cmd_status(UINT8 status) { tBTM_PM_MCB *p_cb; tBTM_PM_STATUS pm_status; tACL_CONN *p_acl_cb; if (btm_cb.pm_pend_link_hdl == BTM_INVALID_HANDLE) { return; } p_acl_cb = btm_handle_to_acl(btm_cb.pm_pend_link_hdl); if (p_acl_cb == NULL) { return; } p_cb = p_acl_cb->p_pm_mode_db; if (status == HCI_SUCCESS) { p_cb->state = BTM_PM_ST_PENDING; pm_status = BTM_PM_STS_PENDING; #if BTM_PM_DEBUG == TRUE BTM_TRACE_DEBUG( "btm_pm_proc_cmd_status new state:0x%x", p_cb->state); #endif // BTM_PM_DEBUG } else { /* the command was not successful. Stay in the same state */ pm_status = BTM_PM_STS_ERROR; } /* notify the caller is appropriate */ if ( (btm_cb.pm_pend_id != BTM_PM_SET_ONLY_ID) && (btm_cb.pm_reg_db[btm_cb.pm_pend_id].mask & BTM_PM_REG_NOTIF) ) { (*btm_cb.pm_reg_db[btm_cb.pm_pend_id].cback)(p_acl_cb->remote_addr, pm_status, 0, status); } /* no pending cmd now */ #if BTM_PM_DEBUG == TRUE BTM_TRACE_DEBUG( "btm_pm_proc_cmd_status state:0x%x, pm_pend_link: %d(new: %d)", p_cb->state, btm_cb.pm_pend_link_hdl, MAX_L2CAP_LINKS); #endif // BTM_PM_DEBUG btm_cb.pm_pend_link_hdl = BTM_INVALID_HANDLE; btm_pm_check_stored(); } /******************************************************************************* ** ** Function btm_process_mode_change ** ** Description This function is called when an HCI mode change event occurs. ** ** Input Params hci_status - status of the event (HCI_SUCCESS if no errors) ** hci_handle - connection handle associated with the change ** mode - HCI_MODE_ACTIVE, HCI_MODE_HOLD, HCI_MODE_SNIFF, or HCI_MODE_PARK ** interval - number of baseband slots (meaning depends on mode) ** ** Returns none. ** *******************************************************************************/ void btm_pm_proc_mode_change (UINT8 hci_status, UINT16 hci_handle, UINT8 mode, UINT16 interval) { tACL_CONN *p; tBTM_PM_MCB *p_cb = NULL; int yy; tBTM_PM_STATE old_state; tL2C_LCB *p_lcb; /* get the index to acl_db */ p = btm_handle_to_acl(hci_handle); if (!p) { return; } /* update control block */ p_cb = p->p_pm_mode_db; old_state = p_cb->state; p_cb->state = mode; p_cb->interval = interval; BTM_TRACE_DEBUG("%s switched from %s to %s.", __func__, mode_to_string(old_state), mode_to_string(p_cb->state)); if ((p_lcb = l2cu_find_lcb_by_bd_addr(p->remote_addr, BT_TRANSPORT_BR_EDR)) != NULL) { if ((p_cb->state == BTM_PM_ST_ACTIVE) || (p_cb->state == BTM_PM_ST_SNIFF)) { /* There might be any pending packets due to SNIFF or PENDING state */ /* Trigger L2C to start transmission of the pending packets. */ BTM_TRACE_DEBUG("btm mode change to active; check l2c_link for outgoing packets"); l2c_link_check_send_pkts(p_lcb, NULL, NULL); } } /* notify registered parties */ for (yy = 0; yy <= BTM_MAX_PM_RECORDS; yy++) { /* set req_mode HOLD mode->ACTIVE */ if ( (mode == BTM_PM_MD_ACTIVE) && (p_cb->req_mode[yy].mode == BTM_PM_MD_HOLD) ) { p_cb->req_mode[yy].mode = BTM_PM_MD_ACTIVE; } } /* new request has been made. - post a message to BTU task */ if (old_state & BTM_PM_STORED_MASK) { #if BTM_PM_DEBUG == TRUE BTM_TRACE_DEBUG( "btm_pm_proc_mode_change: Sending stored req:%d", xx); #endif // BTM_PM_DEBUG btm_pm_snd_md_req(BTM_PM_SET_ONLY_ID, hci_handle, NULL); } else { list_node_t *p_node = NULL; for (p_node =(list_begin(btm_cb.p_pm_mode_db_list)); p_node; p_node = (list_next(p_node))) { p_cb = (tBTM_PM_MCB *)list_node(p_node); if (p_cb->chg_ind == TRUE) { #if BTM_PM_DEBUG == TRUE BTM_TRACE_DEBUG( "btm_pm_proc_mode_change: Sending PM req :%d", zz); #endif // BTM_PM_DEBUG btm_pm_snd_md_req(BTM_PM_SET_ONLY_ID, hci_handle, NULL); break; } } } /* notify registered parties */ for (yy = 0; yy < BTM_MAX_PM_RECORDS; yy++) { if (btm_cb.pm_reg_db[yy].mask & BTM_PM_REG_NOTIF) { (*btm_cb.pm_reg_db[yy].cback)( p->remote_addr, mode, interval, hci_status); } } #if (CLASSIC_BT_INCLUDED == TRUE) /* If mode change was because of an active role switch or change link key */ btm_cont_rswitch(p, btm_find_dev(p->remote_addr), hci_status); #endif // (CLASSIC_BT_INCLUDED == TRUE) } /******************************************************************************* ** ** Function btm_pm_proc_ssr_evt ** ** Description This function is called when an HCI sniff subrating event occurs. ** ** Returns none. ** *******************************************************************************/ #if (BTM_SSR_INCLUDED == TRUE) void btm_pm_proc_ssr_evt (UINT8 *p, UINT16 evt_len) { UINT8 status; UINT16 handle; UINT16 max_rx_lat; int xx; tBTM_PM_MCB *p_cb; tACL_CONN *p_acl = NULL; UINT16 use_ssr = TRUE; UNUSED(evt_len); STREAM_TO_UINT8 (status, p); STREAM_TO_UINT16 (handle, p); /* get the index to acl_db */ p += 2; STREAM_TO_UINT16 (max_rx_lat, p); p_acl = btm_handle_to_acl(handle); if (!p_acl) { return; } p_cb = p_acl->p_pm_mode_db; if (p_cb->interval == max_rx_lat) { /* using legacy sniff */ use_ssr = FALSE; } /* notify registered parties */ for (xx = 0; xx < BTM_MAX_PM_RECORDS; xx++) { if (btm_cb.pm_reg_db[xx].mask & BTM_PM_REG_NOTIF) { (*btm_cb.pm_reg_db[xx].cback)( p_acl->remote_addr, BTM_PM_STS_SSR, use_ssr, status); } } } #endif // BTM_SSR_INCLUDED /******************************************************************************* ** ** Function btm_pm_device_in_active_or_sniff_mode ** ** Description This function is called to check if in active or sniff mode ** ** Returns TRUE, if in active or sniff mode ** *******************************************************************************/ BOOLEAN btm_pm_device_in_active_or_sniff_mode(void) { /* The active state is the highest state-includes connected device and sniff mode*/ /* Covers active and sniff modes */ if (BTM_GetNumAclLinks() > 0) { BTM_TRACE_DEBUG("%s - ACL links: %d", __func__, BTM_GetNumAclLinks()); return TRUE; } #if ((defined BLE_INCLUDED) && (BLE_INCLUDED == TRUE)) /* Check BLE states */ if (btm_ble_get_conn_st() != BLE_CONN_IDLE) { BTM_TRACE_DEBUG("%s - BLE state: %x", __func__, btm_ble_get_conn_st()); return TRUE; } #endif return FALSE; } #if (CLASSIC_BT_INCLUDED == TRUE) /******************************************************************************* ** ** Function btm_pm_device_in_scan_state ** ** Description This function is called to check if in paging, inquiry or connecting mode ** ** Returns TRUE, if in paging, inquiry or connecting mode ** *******************************************************************************/ BOOLEAN btm_pm_device_in_scan_state(void) { /* Scan state-paging, inquiry, and trying to connect */ /* Check for paging */ if (btm_cb.is_paging || (!fixed_queue_is_empty(btm_cb.page_queue)) || BTM_BL_PAGING_STARTED == btm_cb.busy_level) { BTM_TRACE_DEBUG("btm_pm_device_in_scan_state- paging"); return TRUE; } /* Check for inquiry */ if ((btm_cb.btm_inq_vars.inq_active & (BTM_BR_INQ_ACTIVE_MASK | BTM_BLE_INQ_ACTIVE_MASK)) != 0) { BTM_TRACE_DEBUG("btm_pm_device_in_scan_state- Inq active"); return TRUE; } return FALSE; } #endif // #if (CLASSIC_BT_INCLUDED == TRUE) /******************************************************************************* ** ** Function BTM_PM_ReadControllerState ** ** Description This function is called to obtain the controller state ** ** Returns Controller State-BTM_CONTRL_ACTIVE, BTM_CONTRL_SCAN, and BTM_CONTRL_IDLE ** *******************************************************************************/ tBTM_CONTRL_STATE BTM_PM_ReadControllerState(void) { if (TRUE == btm_pm_device_in_active_or_sniff_mode()) { return BTM_CONTRL_ACTIVE; } #if (CLASSIC_BT_INCLUDED == TRUE) else if (TRUE == btm_pm_device_in_scan_state()) { return BTM_CONTRL_SCAN; } #endif // #if (CLASSIC_BT_INCLUDED == TRUE) else { return BTM_CONTRL_IDLE; } } #if (!CONFIG_BT_STACK_NO_LOG) static const char *mode_to_string(tBTM_PM_MODE mode) { switch (mode) { case BTM_PM_MD_ACTIVE: return "ACTIVE"; case BTM_PM_MD_SNIFF: return "SNIFF"; case BTM_PM_MD_PARK: return "PARK"; case BTM_PM_MD_HOLD: return "HOLD"; default: return "UNKNOWN"; } } #endif #endif // #if (CLASSIC_BT_INCLUDED == TRUE)