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esp-idf/components/bt/host/bluedroid/stack/btm/btm_pm.c
xiongweichao 97e728a9aa Dereference null return value
2021-11-22 10:47:23 +08:00

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/******************************************************************************
*
* 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 <stdlib.h>
#include <string.h>
//#include <stdio.h>
#include <stddef.h>
#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"
/*****************************************************************************/
/* 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) ) { /* 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)
int acl_ind;
tBTM_PM_MCB *p_cb;
tACL_CONN *p_acl_cb = NULL;
if ( (acl_ind = btm_pm_find_acl_ind(remote_bda)) == MAX_L2CAP_LINKS) {
return (BTM_UNKNOWN_ADDR);
}
p_acl_cb = btm_bda_to_acl(remote_bda);
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
**, BOOLEAN *p_chg_ind
*******************************************************************************/
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)) ) {
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 Parms 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 successfull. 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 Parms 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 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);
}
/*******************************************************************************
**
** 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, yy;
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 (yy = 0; yy < BTM_MAX_PM_RECORDS; yy++) {
if (btm_cb.pm_reg_db[yy].mask & BTM_PM_REG_NOTIF) {
if ( p_acl) {
(*btm_cb.pm_reg_db[yy].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;
}
/*******************************************************************************
**
** 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;
}
/*******************************************************************************
**
** 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;
} else if (TRUE == btm_pm_device_in_scan_state()) {
return BTM_CONTRL_SCAN;
} 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
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