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esp-idf/components/bt/bluedroid/bta/dm/bta_dm_pm.c

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/******************************************************************************
*
* Copyright (C) 2003-2012 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 the action functions for device manager state
* machine.
*
******************************************************************************/
// #include <assert.h>
#include <string.h>
#include "bta/bta_sys.h"
#include "bta/bta_api.h"
#include "bta_dm_int.h"
#include "stack/btm_api.h"
#include "osi/allocator.h"
tBTA_DM_CONNECTED_SRVCS bta_dm_conn_srvcs;
#if (BTA_DM_PM_INCLUDED == TRUE)
static void bta_dm_pm_cback(tBTA_SYS_CONN_STATUS status, UINT8 id, UINT8 app_id, BD_ADDR peer_addr);
static void bta_dm_pm_set_mode(BD_ADDR peer_addr, tBTA_DM_PM_ACTION pm_mode,
tBTA_DM_PM_REQ pm_req);
static void bta_dm_pm_timer_cback(void *p_tle);
static void bta_dm_pm_btm_cback(BD_ADDR bd_addr, tBTM_PM_STATUS status, UINT16 value, UINT8 hci_status);
static BOOLEAN bta_dm_pm_park(BD_ADDR peer_addr);
static BOOLEAN bta_dm_pm_sniff(tBTA_DM_PEER_DEVICE *p_peer_dev, UINT8 index);
static BOOLEAN bta_dm_pm_is_sco_active ();
static void bta_dm_pm_hid_check(BOOLEAN bScoActive);
static void bta_dm_pm_set_sniff_policy(tBTA_DM_PEER_DEVICE *p_dev, BOOLEAN bDisable);
static void bta_dm_pm_stop_timer_by_index(tBTA_PM_TIMER *p_timer,
UINT8 timer_idx);
#if (BTM_SSR_INCLUDED == TRUE)
#if (defined BTA_HH_INCLUDED && BTA_HH_INCLUDED == TRUE)
#include "../hh/bta_hh_int.h"
/* BTA_DM_PM_SSR1 will be dedicated for HH SSR setting entry, no other profile can use it */
#define BTA_DM_PM_SSR_HH BTA_DM_PM_SSR1
#endif /* (defined BTA_HH_INCLUDED && BTA_HH_INCLUDED == TRUE) */
static void bta_dm_pm_ssr(BD_ADDR peer_addr);
#endif /* (BTM_SSR_INCLUDED == TRUE) */
/*******************************************************************************
**
** Function bta_dm_init_pm
**
** Description Initializes the BT low power manager
**
**
** Returns void
**
*******************************************************************************/
void bta_dm_init_pm(void)
{
memset(&bta_dm_conn_srvcs, 0x00, sizeof(bta_dm_conn_srvcs));
/* if there are no power manger entries, so not register */
if (p_bta_dm_pm_cfg[0].app_id != 0) {
bta_sys_pm_register((tBTA_SYS_CONN_CBACK *)bta_dm_pm_cback);
BTM_PmRegister((BTM_PM_REG_SET | BTM_PM_REG_NOTIF), &bta_dm_cb.pm_id,
bta_dm_pm_btm_cback);
}
/* Need to initialize all PM timer service IDs */
for (int i = 0; i < BTA_DM_NUM_PM_TIMER; i++) {
for (int j = 0; j < BTA_DM_PM_MODE_TIMER_MAX; j++) {
bta_dm_cb.pm_timer[i].srvc_id[j] = BTA_ID_MAX;
}
}
}
/*******************************************************************************
**
** Function bta_dm_disable_pm
**
** Description Disable PM
**
**
** Returns void
**
*******************************************************************************/
void bta_dm_disable_pm(void)
{
BTM_PmRegister( BTM_PM_DEREG, &bta_dm_cb.pm_id, NULL);
/*
* Deregister the PM callback from the system handling to prevent
* re-enabling the PM timers after this call if the callback is invoked.
*/
bta_sys_pm_register((tBTA_SYS_CONN_CBACK *)NULL);
/* Need to stop all active timers. */
for (int i = 0; i < BTA_DM_NUM_PM_TIMER; i++) {
for (int j = 0; j < BTA_DM_PM_MODE_TIMER_MAX; j++) {
bta_dm_pm_stop_timer_by_index(&bta_dm_cb.pm_timer[i], j);
bta_dm_cb.pm_timer[i].pm_action[j] = BTA_DM_PM_NO_ACTION;
}
}
}
/*******************************************************************************
**
** Function bta_dm_pm_stop_timer
**
** Description stop a PM timer
**
**
** Returns void
**
*******************************************************************************/
static void bta_dm_pm_stop_timer(BD_ADDR peer_addr)
{
APPL_TRACE_DEBUG("%s: ", __func__);
for (int i = 0; i < BTA_DM_NUM_PM_TIMER; i++) {
if (bta_dm_cb.pm_timer[i].in_use && !bdcmp(bta_dm_cb.pm_timer[i].peer_bdaddr, peer_addr)) {
for (int j = 0; j < BTA_DM_PM_MODE_TIMER_MAX; j++) {
bta_dm_pm_stop_timer_by_index(&bta_dm_cb.pm_timer[i], j);
/*
* TODO: For now, stopping the timer does not reset
* pm_action[j].
* The reason is because some of the internal logic that
* (re)assigns the pm_action[] values is taking into account
* the older value; e.g., see the pm_action[] assignment in
* function bta_dm_pm_start_timer().
* Such subtlety in the execution logic is error prone, and
* should be eliminiated in the future.
*/
}
break;
}
}
}
/*******************************************************************************
**
** Function bta_pm_action_to_timer_idx
**
** Description convert power mode into timer index for each connected device
**
**
** Returns index of the power mode delay timer
**
*******************************************************************************/
static UINT8 bta_pm_action_to_timer_idx(UINT8 pm_action)
{
if (pm_action == BTA_DM_PM_SUSPEND) {
return BTA_DM_PM_SUSPEND_TIMER_IDX;
} else if (pm_action == BTA_DM_PM_PARK) {
return BTA_DM_PM_PARK_TIMER_IDX;
} else if ((pm_action & BTA_DM_PM_SNIFF) == BTA_DM_PM_SNIFF) {
return BTA_DM_PM_SNIFF_TIMER_IDX;
}
/* Active, no preference, no action and retry */
return BTA_DM_PM_MODE_TIMER_MAX;
}
/*******************************************************************************
**
** Function bta_dm_pm_stop_timer_by_mode
**
** Description stop a PM timer
**
**
** Returns void
**
*******************************************************************************/
static void bta_dm_pm_stop_timer_by_mode(BD_ADDR peer_addr, UINT8 power_mode)
{
const UINT8 timer_idx = bta_pm_action_to_timer_idx(power_mode);
if (timer_idx == BTA_DM_PM_MODE_TIMER_MAX) {
return;
}
for (int i = 0; i < BTA_DM_NUM_PM_TIMER; i++) {
if (bta_dm_cb.pm_timer[i].in_use && !bdcmp(bta_dm_cb.pm_timer[i].peer_bdaddr, peer_addr)) {
if (bta_dm_cb.pm_timer[i].srvc_id[timer_idx] != BTA_ID_MAX) {
bta_dm_pm_stop_timer_by_index(&bta_dm_cb.pm_timer[i], timer_idx);
/*
* TODO: Intentionally setting pm_action[timer_idx].
* This assignment should be eliminated in the future - see the
* pm_action[] related comment inside function
* bta_dm_pm_stop_timer().
*/
bta_dm_cb.pm_timer[i].pm_action[timer_idx] = power_mode;
}
break;
}
}
}
/*******************************************************************************
**
** Function bta_dm_pm_stop_timer_by_srvc_id
**
** Description stop all timer started by the service ID.
**
**
** Returns index of the power mode delay timer
**
*******************************************************************************/
static void bta_dm_pm_stop_timer_by_srvc_id(BD_ADDR peer_addr, UINT8 srvc_id)
{
for (int i = 0; i < BTA_DM_NUM_PM_TIMER; i++) {
if (bta_dm_cb.pm_timer[i].in_use && !bdcmp(bta_dm_cb.pm_timer[i].peer_bdaddr, peer_addr)) {
for (int j = 0; j < BTA_DM_PM_MODE_TIMER_MAX; j++) {
if (bta_dm_cb.pm_timer[i].srvc_id[j] == srvc_id) {
bta_dm_pm_stop_timer_by_index(&bta_dm_cb.pm_timer[i], j);
bta_dm_cb.pm_timer[i].pm_action[j] = BTA_DM_PM_NO_ACTION;
break;
}
}
}
}
}
/*******************************************************************************
**
** Function bta_dm_pm_start_timer
**
** Description start a PM timer
**
**
** Returns void
**
*******************************************************************************/
static void bta_dm_pm_start_timer(tBTA_PM_TIMER *p_timer, UINT8 timer_idx,
INT32 timeout, UINT8 srvc_id, UINT8 pm_action)
{
p_timer->in_use = TRUE;
p_timer->timer[timer_idx].p_cback = bta_dm_pm_timer_cback;
if (p_timer->srvc_id[timer_idx] == BTA_ID_MAX) {
p_timer->active++;
}
if (p_timer->pm_action[timer_idx] < pm_action) {
p_timer->pm_action[timer_idx] = pm_action;
}
p_timer->srvc_id[timer_idx] = srvc_id;
bta_sys_start_timer(&p_timer->timer[timer_idx], 0, timeout);
}
/*******************************************************************************
**
** Function bta_dm_pm_stop_timer_by_index
**
** Description stop a PM timer
**
**
** Returns void
**
*******************************************************************************/
static void bta_dm_pm_stop_timer_by_index(tBTA_PM_TIMER *p_timer,
UINT8 timer_idx)
{
if ((p_timer == NULL) || (timer_idx >= BTA_DM_PM_MODE_TIMER_MAX)) {
return;
}
if (p_timer->srvc_id[timer_idx] == BTA_ID_MAX) {
return; /* The timer was not scheduled */
}
assert(p_timer->in_use && (p_timer->active > 0));
bta_sys_stop_timer(&p_timer->timer[timer_idx]);
p_timer->srvc_id[timer_idx] = BTA_ID_MAX;
/* NOTE: pm_action[timer_idx] intentionally not reset */
p_timer->active--;
if (p_timer->active == 0) {
p_timer->in_use = FALSE;
}
}
UINT32 bta_dm_pm_get_remaining_ticks (TIMER_LIST_ENT *p_target_tle)
{
return bta_sys_get_remaining_ticks(p_target_tle);
}
/*******************************************************************************
**
** Function bta_dm_pm_cback
**
** Description Conn change callback from sys for low power management
**
**
** Returns void
**
*******************************************************************************/
static void bta_dm_pm_cback(tBTA_SYS_CONN_STATUS status, UINT8 id, UINT8 app_id, BD_ADDR peer_addr)
{
UINT8 i, j;
tBTA_DM_PEER_DEVICE *p_dev;
#if (BTM_SSR_INCLUDED == TRUE)
UINT8 *p = NULL;
int index = BTA_DM_PM_SSR0;
#endif
APPL_TRACE_DEBUG("bta_dm_pm_cback: st(%d), id(%d), app(%d)", status, id, app_id);
p_dev = bta_dm_find_peer_device(peer_addr);
/* find if there is an power mode entry for the service */
for (i = 1; i <= p_bta_dm_pm_cfg[0].app_id; i++) {
if ((p_bta_dm_pm_cfg[i].id == id)
&& ((p_bta_dm_pm_cfg[i].app_id == BTA_ALL_APP_ID ) || (p_bta_dm_pm_cfg[i].app_id == app_id ))) {
break;
}
}
/* if no entries are there for the app_id and subsystem in p_bta_dm_pm_spec*/
if (i > p_bta_dm_pm_cfg[0].app_id) {
return;
}
bta_dm_pm_stop_timer_by_srvc_id(peer_addr, id);
/*p_dev = bta_dm_find_peer_device(peer_addr);*/
#if (BTM_SSR_INCLUDED == TRUE)
/* set SSR parameters on SYS CONN OPEN */
if ((BTA_SYS_CONN_OPEN == status) && p_dev && (p_dev->info & BTA_DM_DI_USE_SSR)) {
index = p_bta_dm_pm_spec[p_bta_dm_pm_cfg[i].spec_idx].ssr;
}
#endif
/* if no action for the event */
if (p_bta_dm_pm_spec[p_bta_dm_pm_cfg[i].spec_idx].actn_tbl[status][0].power_mode == BTA_DM_PM_NO_ACTION) {
#if (BTM_SSR_INCLUDED == TRUE)
if (BTA_DM_PM_SSR0 == index) /* and do not need to set SSR, return. */
#endif
return;
}
for (j = 0; j < bta_dm_conn_srvcs.count ; j++) {
/* check if an entry already present */
if ((bta_dm_conn_srvcs.conn_srvc[j].id == id)
&& (bta_dm_conn_srvcs.conn_srvc[j].app_id == app_id )
&& !bdcmp(bta_dm_conn_srvcs.conn_srvc[j].peer_bdaddr, peer_addr)) {
bta_dm_conn_srvcs.conn_srvc[j].new_request = TRUE;
break;
}
}
/* if subsystem has no more preference on the power mode remove
the cb */
if (p_bta_dm_pm_spec[p_bta_dm_pm_cfg[i].spec_idx].actn_tbl[status][0].power_mode == BTA_DM_PM_NO_PREF) {
if (j != bta_dm_conn_srvcs.count) {
bta_dm_conn_srvcs.count--;
for (; j < bta_dm_conn_srvcs.count ; j++) {
memcpy(&bta_dm_conn_srvcs.conn_srvc[j], &bta_dm_conn_srvcs.conn_srvc[j + 1], sizeof(bta_dm_conn_srvcs.conn_srvc[j]));
}
} else {
APPL_TRACE_WARNING("bta_dm_act no entry for connected service cbs");
return;
}
} else if (j == bta_dm_conn_srvcs.count ) {
/* check if we have more connected service that cbs */
if (bta_dm_conn_srvcs.count == BTA_DM_NUM_CONN_SRVS) {
APPL_TRACE_WARNING("bta_dm_act no more connected service cbs");
return;
}
/* fill in a new cb */
bta_dm_conn_srvcs.conn_srvc[j].id = id;
bta_dm_conn_srvcs.conn_srvc[j].app_id = app_id;
bta_dm_conn_srvcs.conn_srvc[j].new_request = TRUE;
bdcpy(bta_dm_conn_srvcs.conn_srvc[j].peer_bdaddr, peer_addr);
APPL_TRACE_WARNING("new conn_srvc id:%d, app_id:%d", id, app_id);
bta_dm_conn_srvcs.count++;
bta_dm_conn_srvcs.conn_srvc[j].state = status;
} else {
/* no service is added or removed. only updating status. */
bta_dm_conn_srvcs.conn_srvc[j].state = status;
}
/* stop timer */
bta_dm_pm_stop_timer(peer_addr);
if (p_dev) {
p_dev->pm_mode_attempted = 0;
p_dev->pm_mode_failed = 0;
}
#if (BTM_SSR_INCLUDED == TRUE)
if (p_bta_dm_ssr_spec[index].max_lat
#if (defined BTA_HH_INCLUDED && BTA_HH_INCLUDED == TRUE)
|| index == BTA_DM_PM_SSR_HH
#endif
) {
bta_dm_pm_ssr(peer_addr);
} else {
if ( ((NULL != (p = BTM_ReadLocalFeatures ())) && HCI_SNIFF_SUB_RATE_SUPPORTED(p)) &&
((NULL != (p = BTM_ReadRemoteFeatures (peer_addr))) && HCI_SNIFF_SUB_RATE_SUPPORTED(p)) &&
(index == BTA_DM_PM_SSR0)) {
if (status == BTA_SYS_SCO_OPEN) {
APPL_TRACE_DEBUG("%s: SCO inactive, reset SSR to zero", __func__);
BTM_SetSsrParams (peer_addr, 0, 0, 0 );
} else if (status == BTA_SYS_SCO_CLOSE) {
APPL_TRACE_DEBUG("%s: SCO active, back to old SSR", __func__);
bta_dm_pm_ssr(peer_addr);
}
}
}
#endif
bta_dm_pm_set_mode(peer_addr, BTA_DM_PM_NO_ACTION, BTA_DM_PM_NEW_REQ);
/* perform the HID link workaround if needed
** 1. If SCO up/down event is received OR
** 2. If HID connection open is received and SCO is already active.
** This will handle the case where HID connects when SCO already active
*/
if ( BTM_IsDeviceUp() &&
( ((status == BTA_SYS_SCO_OPEN) || (status == BTA_SYS_SCO_CLOSE)) ||
((status == BTA_SYS_CONN_OPEN) && (id == BTA_ID_HH) && bta_dm_pm_is_sco_active()) ) ) {
BOOLEAN bScoActive;
if (status == BTA_SYS_CONN_OPEN) {
bScoActive = TRUE;
} else {
bScoActive = (status == BTA_SYS_SCO_OPEN);
}
bta_dm_pm_hid_check(bScoActive);
}
}
/*******************************************************************************
**
** Function bta_dm_pm_set_mode
**
** Description Set the power mode for the device
**
**
** Returns void
**
*******************************************************************************/
static void bta_dm_pm_set_mode(BD_ADDR peer_addr, tBTA_DM_PM_ACTION pm_request,
tBTA_DM_PM_REQ pm_req )
{
tBTA_DM_PM_ACTION pm_action = BTA_DM_PM_NO_ACTION;
UINT16 timeout = 0;
UINT8 i, j;
tBTA_DM_PM_ACTION failed_pm = 0;
tBTA_DM_PEER_DEVICE *p_peer_device = NULL;
tBTA_DM_PM_ACTION allowed_modes = 0;
tBTA_DM_PM_ACTION pref_modes = 0;
tBTA_DM_PM_CFG *p_pm_cfg;
tBTA_DM_PM_SPEC *p_pm_spec;
tBTA_DM_PM_ACTN *p_act0, *p_act1;
tBTA_DM_SRVCS *p_srvcs = NULL;
BOOLEAN timer_started = FALSE;
UINT8 timer_idx, available_timer = BTA_DM_PM_MODE_TIMER_MAX;
UINT32 remaining_ticks = 0;
if (!bta_dm_cb.device_list.count) {
return;
}
/* see if any attempt to put device in low power mode failed */
p_peer_device = bta_dm_find_peer_device(peer_addr);
/* if no peer device found return */
if (p_peer_device == NULL) {
return;
}
failed_pm = p_peer_device->pm_mode_failed;
for (i = 0; i < bta_dm_conn_srvcs.count ; i++) {
p_srvcs = &bta_dm_conn_srvcs.conn_srvc[i];
if (!bdcmp(p_srvcs->peer_bdaddr, peer_addr)) {
/* p_bta_dm_pm_cfg[0].app_id is the number of entries */
for (j = 1; j <= p_bta_dm_pm_cfg[0].app_id; j++) {
if ((p_bta_dm_pm_cfg[j].id == p_srvcs->id)
&& ((p_bta_dm_pm_cfg[j].app_id == BTA_ALL_APP_ID ) ||
(p_bta_dm_pm_cfg[j].app_id == p_srvcs->app_id))) {
break;
}
}
p_pm_cfg = &p_bta_dm_pm_cfg[j];
p_pm_spec = &p_bta_dm_pm_spec[p_pm_cfg->spec_idx];
p_act0 = &p_pm_spec->actn_tbl[p_srvcs->state][0];
p_act1 = &p_pm_spec->actn_tbl[p_srvcs->state][1];
APPL_TRACE_DEBUG("bta_dm_pm_set_mode: srvcsid: %d, state: %d, j: %d", p_srvcs->id, p_srvcs->state, j);
allowed_modes |= p_pm_spec->allow_mask;
/* PM actions are in the order of strictness */
/* first check if the first preference is ok */
if (!(failed_pm & p_act0->power_mode)) {
pref_modes |= p_act0->power_mode;
if (p_act0->power_mode >= pm_action) {
pm_action = p_act0->power_mode;
if (pm_req != BTA_DM_PM_NEW_REQ || p_srvcs->new_request) {
p_srvcs->new_request = FALSE;
timeout = p_act0->timeout;
}
}
}
/* if first preference has already failed, try second preference */
else if (!(failed_pm & p_act1->power_mode)) {
pref_modes |= p_act1->power_mode;
if (p_act1->power_mode > pm_action) {
pm_action = p_act1->power_mode;
timeout = p_act1->timeout;
}
}
}
}
if (pm_action & (BTA_DM_PM_PARK | BTA_DM_PM_SNIFF)) {
/* some service don't like the mode */
if (!(allowed_modes & pm_action)) {
/* select the other mode if its allowed and preferred, otherwise 0 which is BTA_DM_PM_NO_ACTION */
pm_action = (allowed_modes & (BTA_DM_PM_PARK | BTA_DM_PM_SNIFF) & pref_modes);
/* no timeout needed if no action is required */
if (pm_action == BTA_DM_PM_NO_ACTION) {
timeout = 0;
}
}
}
/* if need to start a timer */
if ((pm_req != BTA_DM_PM_EXECUTE) && timeout) {
for (i = 0; i < BTA_DM_NUM_PM_TIMER; i++) {
if (bta_dm_cb.pm_timer[i].in_use && bdcmp(bta_dm_cb.pm_timer[i].peer_bdaddr, peer_addr) == 0) {
if ((timer_idx = bta_pm_action_to_timer_idx(pm_action)) != BTA_DM_PM_MODE_TIMER_MAX) {
remaining_ticks = bta_dm_pm_get_remaining_ticks(&bta_dm_cb.pm_timer[i].timer[timer_idx]);
if (remaining_ticks < timeout) {
APPL_TRACE_DEBUG("%s remain 0\n", __func__);
/* Cancel and restart the timer */
/*
* TODO: The value of pm_action[timer_idx] is
* conditionally updated between the two function
* calls below when the timer is restarted.
* This logic is error-prone and should be eliminated
* in the future.
*/
bta_dm_pm_stop_timer_by_index(&bta_dm_cb.pm_timer[i],
timer_idx);
bta_dm_pm_start_timer(&bta_dm_cb.pm_timer[i], timer_idx, timeout, p_srvcs->id, pm_action);
}
timer_started = TRUE;
}
break;
} else if (!bta_dm_cb.pm_timer[i].in_use) {
APPL_TRACE_DEBUG("%s dm_pm_timer:%d, %d", __func__, i, timeout);
if (available_timer == BTA_DM_PM_MODE_TIMER_MAX) {
available_timer = i;
}
}
}
/* new power mode for a new active connection */
if (!timer_started) {
if ( available_timer != BTA_DM_PM_MODE_TIMER_MAX) {
bdcpy(bta_dm_cb.pm_timer[available_timer].peer_bdaddr, peer_addr);
if ((timer_idx = bta_pm_action_to_timer_idx(pm_action)) != BTA_DM_PM_MODE_TIMER_MAX) {
bta_dm_pm_start_timer(&bta_dm_cb.pm_timer[available_timer], timer_idx, timeout, p_srvcs->id, pm_action);
timer_started = TRUE;
}
}
/* no more timers */
else {
APPL_TRACE_WARNING("bta_dm_act dm_pm_timer no more");
}
}
return;
}
/* if pending power mode timer expires, and currecnt link is in a
lower power mode than current profile requirement, igonre it */
if (pm_req == BTA_DM_PM_EXECUTE && pm_request < pm_action) {
APPL_TRACE_ERROR("Ignore the power mode request: %d", pm_request)
return;
}
if (pm_action == BTA_DM_PM_PARK) {
p_peer_device->pm_mode_attempted = BTA_DM_PM_PARK;
bta_dm_pm_park(peer_addr);
} else if (pm_action & BTA_DM_PM_SNIFF) {
/* dont initiate SNIFF, if link_policy has it disabled */
if (p_peer_device->link_policy & HCI_ENABLE_SNIFF_MODE) {
p_peer_device->pm_mode_attempted = BTA_DM_PM_SNIFF;
bta_dm_pm_sniff(p_peer_device, (UINT8)(pm_action & 0x0F) );
} else {
APPL_TRACE_DEBUG("bta_dm_pm_set_mode: Link policy disallows SNIFF, ignore request");
}
} else if (pm_action == BTA_DM_PM_ACTIVE) {
bta_dm_pm_active(peer_addr);
}
}
/*******************************************************************************
**
** Function bta_ag_pm_park
**
** Description Switch to park mode.
**
**
** Returns TRUE if park attempted, FALSE otherwise.
**
*******************************************************************************/
static BOOLEAN bta_dm_pm_park(BD_ADDR peer_addr)
{
tBTM_PM_MODE mode = BTM_PM_STS_ACTIVE;
/* if not in park mode, switch to park */
BTM_ReadPowerMode(peer_addr, &mode);
if (mode != BTM_PM_MD_PARK) {
BTM_SetPowerMode (bta_dm_cb.pm_id, peer_addr, &p_bta_dm_pm_md[BTA_DM_PM_PARK_IDX]);
}
return TRUE;
}
/*******************************************************************************
**
** Function bta_ag_pm_sniff
**
** Description Switch to sniff mode.
**
**
** Returns TRUE if sniff attempted, FALSE otherwise.
**
*******************************************************************************/
static BOOLEAN bta_dm_pm_sniff(tBTA_DM_PEER_DEVICE *p_peer_dev, UINT8 index)
{
tBTM_PM_MODE mode = BTM_PM_STS_ACTIVE;
tBTM_PM_PWR_MD pwr_md;
tBTM_STATUS status;
#if (BTM_SSR_INCLUDED == TRUE)
UINT8 *p_rem_feat = NULL;
#endif
BTM_ReadPowerMode(p_peer_dev->peer_bdaddr, &mode);
#if (BTM_SSR_INCLUDED == TRUE)
p_rem_feat = BTM_ReadRemoteFeatures (p_peer_dev->peer_bdaddr);
APPL_TRACE_DEBUG("bta_dm_pm_sniff cur:%d, idx:%d, info:x%x", mode, index, p_peer_dev->info);
if (mode != BTM_PM_MD_SNIFF ||
(HCI_SNIFF_SUB_RATE_SUPPORTED(BTM_ReadLocalFeatures ()) && p_rem_feat &&
HCI_SNIFF_SUB_RATE_SUPPORTED(p_rem_feat) &&
!(p_peer_dev->info & BTA_DM_DI_USE_SSR)))
#else
APPL_TRACE_DEBUG("bta_dm_pm_sniff cur:%d, idx:%d", mode, index);
if (mode != BTM_PM_MD_SNIFF)
#endif
{
#if (BTM_SSR_INCLUDED == TRUE)
/* Dont initiate Sniff if controller has alreay accepted
* remote sniff params. This avoid sniff loop issue with
* some agrresive headsets who use sniff latencies more than
* DUT supported range of Sniff intervals.*/
if ((mode == BTM_PM_MD_SNIFF) && (p_peer_dev->info & BTA_DM_DI_ACP_SNIFF)) {
APPL_TRACE_DEBUG("%s: already in remote initiate sniff", __func__);
return TRUE;
}
#endif
/* if the current mode is not sniff, issue the sniff command.
* If sniff, but SSR is not used in this link, still issue the command */
memcpy(&pwr_md, &p_bta_dm_pm_md[index], sizeof (tBTM_PM_PWR_MD));
if (p_peer_dev->info & BTA_DM_DI_INT_SNIFF) {
pwr_md.mode |= BTM_PM_MD_FORCE;
}
status = BTM_SetPowerMode (bta_dm_cb.pm_id, p_peer_dev->peer_bdaddr, &pwr_md);
if (status == BTM_CMD_STORED || status == BTM_CMD_STARTED) {
p_peer_dev->info &= ~(BTA_DM_DI_INT_SNIFF | BTA_DM_DI_ACP_SNIFF);
p_peer_dev->info |= BTA_DM_DI_SET_SNIFF;
} else if (status == BTM_SUCCESS) {
APPL_TRACE_DEBUG("bta_dm_pm_sniff BTM_SetPowerMode() returns BTM_SUCCESS");
p_peer_dev->info &= ~(BTA_DM_DI_INT_SNIFF | BTA_DM_DI_ACP_SNIFF | BTA_DM_DI_SET_SNIFF);
} else { /* error */
APPL_TRACE_ERROR("bta_dm_pm_sniff BTM_SetPowerMode() returns ERROR status=%d", status);
p_peer_dev->info &= ~(BTA_DM_DI_INT_SNIFF | BTA_DM_DI_ACP_SNIFF | BTA_DM_DI_SET_SNIFF);
}
}
return TRUE;
}
/*******************************************************************************
**
** Function bta_dm_pm_ssr
**
** Description checks and sends SSR parameters
**
** Returns void
**
*******************************************************************************/
#if (BTM_SSR_INCLUDED == TRUE)
static void bta_dm_pm_ssr(BD_ADDR peer_addr)
{
tBTA_DM_SSR_SPEC *p_spec, *p_spec_cur;
UINT8 i, j;
int ssr = BTA_DM_PM_SSR0;
/* go through the connected services */
for (i = 0; i < bta_dm_conn_srvcs.count ; i++) {
if (!bdcmp(bta_dm_conn_srvcs.conn_srvc[i].peer_bdaddr, peer_addr)) {
/* p_bta_dm_pm_cfg[0].app_id is the number of entries */
for (j = 1; j <= p_bta_dm_pm_cfg[0].app_id; j++) {
/* find the associated p_bta_dm_pm_cfg */
if ((p_bta_dm_pm_cfg[j].id == bta_dm_conn_srvcs.conn_srvc[i].id)
&& ((p_bta_dm_pm_cfg[j].app_id == BTA_ALL_APP_ID )
|| (p_bta_dm_pm_cfg[j].app_id == bta_dm_conn_srvcs.conn_srvc[i].app_id))) {
APPL_TRACE_WARNING("bta_dm_pm_ssr conn_srvc id:%d, app_id:%d",
bta_dm_conn_srvcs.conn_srvc[i].id, bta_dm_conn_srvcs.conn_srvc[i].app_id);
break;
}
}
/* find the ssr index with the smallest max latency. */
p_spec_cur = &p_bta_dm_ssr_spec[p_bta_dm_pm_spec[p_bta_dm_pm_cfg[j].spec_idx].ssr];
p_spec = &p_bta_dm_ssr_spec[ssr];
#if (defined BTA_HH_INCLUDED && BTA_HH_INCLUDED == TRUE)
/* HH has the per connection SSR preference, already read the SSR params from BTA HH */
if (p_bta_dm_pm_spec[p_bta_dm_pm_cfg[j].spec_idx].ssr == BTA_DM_PM_SSR_HH) {
if (bta_hh_read_ssr_param(peer_addr, &p_spec_cur->max_lat, &p_spec_cur->min_rmt_to) == BTA_HH_ERR) {
continue;
}
}
#endif
if (p_spec_cur->max_lat < p_spec->max_lat ||
(ssr == BTA_DM_PM_SSR0 && p_bta_dm_pm_spec[p_bta_dm_pm_cfg[j].spec_idx].ssr != BTA_DM_PM_SSR0)) {
ssr = p_bta_dm_pm_spec[p_bta_dm_pm_cfg[j].spec_idx].ssr;
}
}
}
p_spec = &p_bta_dm_ssr_spec[ssr];
APPL_TRACE_WARNING("bta_dm_pm_ssr:%d, lat:%d", ssr, p_spec->max_lat);
if (p_spec->max_lat) {
/* set the SSR parameters. */
BTM_SetSsrParams (peer_addr, p_spec->max_lat,
p_spec->min_rmt_to, p_spec->min_loc_to);
}
}
#endif
/*******************************************************************************
**
** Function bta_dm_pm_active
**
** Description Brings connection to active mode
**
**
** Returns void
**
*******************************************************************************/
void bta_dm_pm_active(BD_ADDR peer_addr)
{
tBTM_PM_PWR_MD pm;
memset( (void *)&pm, 0, sizeof(pm));
/* switch to active mode */
pm.mode = BTM_PM_MD_ACTIVE;
BTM_SetPowerMode (bta_dm_cb.pm_id, peer_addr, &pm);
}
/*******************************************************************************
**
** Function bta_dm_pm_btm_cback
**
** Description BTM power manager callback.
**
**
** Returns void
**
*******************************************************************************/
static void bta_dm_pm_btm_cback(BD_ADDR bd_addr, tBTM_PM_STATUS status, UINT16 value, UINT8 hci_status)
{
tBTA_DM_PM_BTM_STATUS *p_buf;
if ((p_buf = (tBTA_DM_PM_BTM_STATUS *) osi_malloc(sizeof(tBTA_DM_PM_BTM_STATUS))) != NULL) {
p_buf->hdr.event = BTA_DM_PM_BTM_STATUS_EVT;
p_buf->status = status;
p_buf->value = value;
p_buf->hci_status = hci_status;
bdcpy(p_buf->bd_addr, bd_addr);
bta_sys_sendmsg(p_buf);
}
}
/*******************************************************************************
**
** Function bta_dm_pm_timer_cback
**
** Description Power management timer callback.
**
**
** Returns void
**
*******************************************************************************/
static void bta_dm_pm_timer_cback(void *p_tle)
{
UINT8 i, j;
for (i = 0; i < BTA_DM_NUM_PM_TIMER; i++) {
APPL_TRACE_DEBUG("dm_pm_timer[%d] in use? %d", i, bta_dm_cb.pm_timer[i].in_use);
if (bta_dm_cb.pm_timer[i].in_use) {
for (j = 0; j < BTA_DM_PM_MODE_TIMER_MAX; j++) {
if (&bta_dm_cb.pm_timer[i].timer[j] == (TIMER_LIST_ENT *) p_tle) {
bta_dm_cb.pm_timer[i].active --;
bta_dm_cb.pm_timer[i].srvc_id[j] = BTA_ID_MAX;
APPL_TRACE_DEBUG("dm_pm_timer[%d] expires, timer_idx=%d", i, j);
break;
}
}
if (bta_dm_cb.pm_timer[i].active == 0) {
bta_dm_cb.pm_timer[i].in_use = FALSE;
}
if (j < BTA_DM_PM_MODE_TIMER_MAX) {
break;
}
}
}
/* no more timers */
if (i == BTA_DM_NUM_PM_TIMER) {
return;
}
tBTA_DM_PM_TIMER *p_buf = (tBTA_DM_PM_TIMER *) osi_malloc(sizeof(tBTA_DM_PM_TIMER));
if (p_buf != NULL) {
p_buf->hdr.event = BTA_DM_PM_TIMER_EVT;
p_buf->pm_request = bta_dm_cb.pm_timer[i].pm_action[j];
bdcpy(p_buf->bd_addr, bta_dm_cb.pm_timer[i].peer_bdaddr);
bta_sys_sendmsg(p_buf);
}
}
/*******************************************************************************
**
** Function bta_dm_pm_btm_status
**
** Description Process pm status event from btm
**
**
** Returns void
**
*******************************************************************************/
void bta_dm_pm_btm_status(tBTA_DM_MSG *p_data)
{
APPL_TRACE_DEBUG("%s status: %d", __func__, p_data->pm_status.status);
tBTA_DM_PEER_DEVICE *p_dev = bta_dm_find_peer_device(p_data->pm_status.bd_addr);
if (NULL == p_dev) {
return;
}
tBTA_DM_DEV_INFO info = p_dev->info;
/* check new mode */
switch (p_data->pm_status.status) {
case BTM_PM_STS_ACTIVE:
/* if our sniff or park attempt failed
we should not try it again*/
if (p_data->pm_status.hci_status != 0) {
APPL_TRACE_ERROR("%s hci_status=%d", __func__, p_data->pm_status.hci_status);
p_dev->info &= ~(BTA_DM_DI_INT_SNIFF | BTA_DM_DI_ACP_SNIFF | BTA_DM_DI_SET_SNIFF);
if (p_dev->pm_mode_attempted & (BTA_DM_PM_PARK | BTA_DM_PM_SNIFF)) {
p_dev->pm_mode_failed
|= ((BTA_DM_PM_PARK | BTA_DM_PM_SNIFF) & p_dev->pm_mode_attempted);
bta_dm_pm_stop_timer_by_mode(p_data->pm_status.bd_addr, p_dev->pm_mode_attempted);
bta_dm_pm_set_mode(p_data->pm_status.bd_addr, BTA_DM_PM_NO_ACTION, BTA_DM_PM_RESTART);
}
} else {
#if (BTM_SSR_INCLUDED == TRUE)
if (p_dev->prev_low) {
/* need to send the SSR paramaters to controller again */
bta_dm_pm_ssr(p_dev->peer_bdaddr);
}
p_dev->prev_low = BTM_PM_STS_ACTIVE;
#endif
/* link to active mode, need to restart the timer for next low power mode if needed */
bta_dm_pm_stop_timer(p_data->pm_status.bd_addr);
bta_dm_pm_set_mode(p_data->pm_status.bd_addr, BTA_DM_PM_NO_ACTION, BTA_DM_PM_RESTART);
}
break;
#if (BTM_SSR_INCLUDED == TRUE)
case BTM_PM_STS_PARK:
case BTM_PM_STS_HOLD:
/* save the previous low power mode - for SSR.
* SSR parameters are sent to controller on "conn open".
* the numbers stay good until park/hold/detach */
if (p_dev->info & BTA_DM_DI_USE_SSR) {
p_dev->prev_low = p_data->pm_status.status;
}
break;
case BTM_PM_STS_SSR:
if (p_data->pm_status.value) {
p_dev->info |= BTA_DM_DI_USE_SSR;
} else {
p_dev->info &= ~BTA_DM_DI_USE_SSR;
}
break;
#endif
case BTM_PM_STS_SNIFF:
if (p_data->pm_status.hci_status == 0) {
/* Stop PM timer now if already active for
* particular device since link is already
* put in sniff mode by remote device, and
* PM timer sole purpose is to put the link
* in sniff mode from host side.
*/
bta_dm_pm_stop_timer(p_data->pm_status.bd_addr);
} else {
p_dev->info &= ~(BTA_DM_DI_SET_SNIFF | BTA_DM_DI_INT_SNIFF | BTA_DM_DI_ACP_SNIFF);
if (info & BTA_DM_DI_SET_SNIFF) {
p_dev->info |= BTA_DM_DI_INT_SNIFF;
} else {
p_dev->info |= BTA_DM_DI_ACP_SNIFF;
}
}
break;
case BTM_PM_STS_ERROR:
p_dev->info &= ~BTA_DM_DI_SET_SNIFF;
break;
default:
break;
}
}
/*******************************************************************************
**
** Function bta_dm_pm_timer
**
** Description Process pm timer event from btm
**
**
** Returns void
**
*******************************************************************************/
void bta_dm_pm_timer(tBTA_DM_MSG *p_data)
{
APPL_TRACE_EVENT("%s", __func__);
bta_dm_pm_set_mode(p_data->pm_timer.bd_addr, p_data->pm_timer.pm_request, BTA_DM_PM_EXECUTE);
}
/*******************************************************************************
**
** Function bta_dm_is_sco_active
**
** Description Loop through connected services for HFP+State=SCO
**
** Returns BOOLEAN. TRUE if SCO active, else FALSE
**
*******************************************************************************/
static BOOLEAN bta_dm_pm_is_sco_active ()
{
int j;
BOOLEAN bScoActive = FALSE;
for (j = 0; j < bta_dm_conn_srvcs.count ; j++) {
/* check if an entry already present */
if ( (bta_dm_conn_srvcs.conn_srvc[j].id == BTA_ID_AG ) && (bta_dm_conn_srvcs.conn_srvc[j].state == BTA_SYS_SCO_OPEN) ) {
bScoActive = TRUE;
break;
}
}
APPL_TRACE_DEBUG("bta_dm_is_sco_active: SCO active: %d", bScoActive);
return bScoActive;
}
/*******************************************************************************
**
** Function bta_dm_pm_hid_check
**
** Description Disables/Enables sniff in link policy based on SCO Up/Down
**
** Returns None
**
*******************************************************************************/
static void bta_dm_pm_hid_check(BOOLEAN bScoActive)
{
int j;
/* if HID is active, disable the link policy */
for (j = 0; j < bta_dm_conn_srvcs.count ; j++) {
/* check if an entry already present */
if (bta_dm_conn_srvcs.conn_srvc[j].id == BTA_ID_HH ) {
APPL_TRACE_DEBUG ("SCO status change(Active: %d), modify HID link policy. state: %d",
bScoActive, bta_dm_conn_srvcs.conn_srvc[j].state);
bta_dm_pm_set_sniff_policy( bta_dm_find_peer_device(bta_dm_conn_srvcs.conn_srvc[j].peer_bdaddr), bScoActive);
/* if we had disabled link policy, seems like the hid device stop retrying SNIFF after a few tries. force sniff if needed */
if (!bScoActive) {
bta_dm_pm_set_mode(bta_dm_conn_srvcs.conn_srvc[j].peer_bdaddr, BTA_DM_PM_NO_ACTION,
BTA_DM_PM_RESTART);
}
}
}
}
/*******************************************************************************
**
** Function bta_dm_pm_set_sniff_policy
**
** Description Disables/Enables sniff in link policy for the give device
**
** Returns None
**
*******************************************************************************/
static void bta_dm_pm_set_sniff_policy(tBTA_DM_PEER_DEVICE *p_dev, BOOLEAN bDisable)
{
UINT16 policy_setting;
if (!p_dev) {
return;
}
if (bDisable) {
policy_setting = bta_dm_cb.cur_policy &
(HCI_ENABLE_MASTER_SLAVE_SWITCH |
HCI_ENABLE_HOLD_MODE |
HCI_ENABLE_PARK_MODE);
} else {
/* allow sniff after sco is closed */
policy_setting = bta_dm_cb.cur_policy;
}
/* if disabling SNIFF, make sure link is Active */
if (bDisable) {
bta_dm_pm_active(p_dev->peer_bdaddr);
}
/* update device record and set link policy */
p_dev->link_policy = policy_setting;
BTM_SetLinkPolicy(p_dev->peer_bdaddr, &policy_setting);
}
#endif /* #if (BTA_DM_PM_INCLUDED == TRUE) */
/*******************************************************************************
**
** Function bta_dm_get_av_count
**
** Description Get the number of connected AV
**
**
** Returns number of av connections
**
*******************************************************************************/
UINT8 bta_dm_get_av_count(void)
{
UINT8 count = 0;
for (int i = 0; i < bta_dm_conn_srvcs.count; i++) {
if (bta_dm_conn_srvcs.conn_srvc[i].id == BTA_ID_AV) {
++count;
}
}
return count;
}
/*******************************************************************************
**
** Function bta_dm_find_peer_device
**
** Description Given an address, find the associated control block.
**
** Returns tBTA_DM_PEER_DEVICE
**
*******************************************************************************/
tBTA_DM_PEER_DEVICE *bta_dm_find_peer_device(BD_ADDR peer_addr)
{
tBTA_DM_PEER_DEVICE *p_dev = NULL;
for (int i = 0; i < bta_dm_cb.device_list.count; i++) {
if (!bdcmp( bta_dm_cb.device_list.peer_device[i].peer_bdaddr, peer_addr)) {
p_dev = &bta_dm_cb.device_list.peer_device[i];
break;
}
}
return p_dev;
}
#if ((defined BLE_INCLUDED) && (BLE_INCLUDED == TRUE) && SDP_INCLUDED == TRUE)
/*******************************************************************************
**
** Function bta_dm_pm_obtain_controller_state
**
** Description This function obtains the consolidated controller power state
**
** Parameters:
**
*******************************************************************************/
tBTA_DM_CONTRL_STATE bta_dm_pm_obtain_controller_state(void)
{
/* Did not use counts as it is not sure, how accurate the count values are in
** bta_dm_cb.device_list.count > 0 || bta_dm_cb.device_list.le_count > 0 */
tBTA_DM_CONTRL_STATE cur_state = BTA_DM_CONTRL_UNKNOWN;
cur_state = BTM_PM_ReadControllerState();
APPL_TRACE_DEBUG("bta_dm_pm_obtain_controller_state: %d", cur_state);
return cur_state;
}
#endif
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