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/******************************************************************************
*
* Copyright (C) 2014 Google, Inc.
*
* 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.
*
******************************************************************************/
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include "osi/alarm.h"
#include "osi/allocator.h"
#include "osi/list.h"
#include "esp_timer.h"
#include "btc/btc_task.h"
#include "btc/btc_alarm.h"
#include "osi/mutex.h"
#include "bt_common.h"
typedef struct alarm_t {
/* timer id point to here */
esp_timer_handle_t alarm_hdl;
osi_alarm_callback_t cb;
void *cb_data;
int64_t deadline_us;
} osi_alarm_t;
enum {
ALARM_STATE_IDLE,
ALARM_STATE_OPEN,
};
static osi_mutex_t alarm_mutex;
static int alarm_state;
#if (BT_BLE_DYNAMIC_ENV_MEMORY == FALSE)
static struct alarm_t alarm_cbs[ALARM_CBS_NUM];
#else
static struct alarm_t *alarm_cbs;
#endif
static osi_alarm_err_t alarm_free(osi_alarm_t *alarm);
static osi_alarm_err_t alarm_set(osi_alarm_t *alarm, period_ms_t timeout, bool is_periodic);
int osi_alarm_create_mux(void)
{
if (alarm_state != ALARM_STATE_IDLE) {
OSI_TRACE_WARNING("%s, invalid state %d\n", __func__, alarm_state);
return -1;
}
osi_mutex_new(&alarm_mutex);
return 0;
}
int osi_alarm_delete_mux(void)
{
if (alarm_state != ALARM_STATE_IDLE) {
OSI_TRACE_WARNING("%s, invalid state %d\n", __func__, alarm_state);
return -1;
}
osi_mutex_free(&alarm_mutex);
return 0;
}
void osi_alarm_init(void)
{
assert(alarm_mutex != NULL);
osi_mutex_lock(&alarm_mutex, OSI_MUTEX_MAX_TIMEOUT);
if (alarm_state != ALARM_STATE_IDLE) {
OSI_TRACE_WARNING("%s, invalid state %d\n", __func__, alarm_state);
goto end;
}
#if (BT_BLE_DYNAMIC_ENV_MEMORY == TRUE)
if ((alarm_cbs = (osi_alarm_t *)osi_malloc(sizeof(osi_alarm_t) * ALARM_CBS_NUM)) == NULL) {
OSI_TRACE_ERROR("%s, malloc failed\n", __func__);
goto end;
}
#endif
memset(alarm_cbs, 0x00, sizeof(osi_alarm_t) * ALARM_CBS_NUM);
alarm_state = ALARM_STATE_OPEN;
end:
osi_mutex_unlock(&alarm_mutex);
}
void osi_alarm_deinit(void)
{
assert(alarm_mutex != NULL);
osi_mutex_lock(&alarm_mutex, OSI_MUTEX_MAX_TIMEOUT);
if (alarm_state != ALARM_STATE_OPEN) {
OSI_TRACE_WARNING("%s, invalid state %d\n", __func__, alarm_state);
goto end;
}
for (int i = 0; i < ALARM_CBS_NUM; i++) {
if (alarm_cbs[i].alarm_hdl != NULL) {
alarm_free(&alarm_cbs[i]);
}
}
#if (BT_BLE_DYNAMIC_ENV_MEMORY == TRUE)
osi_free(alarm_cbs);
alarm_cbs = NULL;
#endif
alarm_state = ALARM_STATE_IDLE;
end:
osi_mutex_unlock(&alarm_mutex);
}
static struct alarm_t *alarm_cbs_lookfor_available(void)
{
int i;
for (i = 0; i < ALARM_CBS_NUM; i++) {
if (alarm_cbs[i].alarm_hdl == NULL) { //available
OSI_TRACE_DEBUG("%s %d %p\n", __func__, i, &alarm_cbs[i]);
return &alarm_cbs[i];
}
}
return NULL;
}
static void alarm_cb_handler(struct alarm_t *alarm)
{
OSI_TRACE_DEBUG("TimerID %p\n", alarm);
if (alarm_state != ALARM_STATE_OPEN) {
OSI_TRACE_WARNING("%s, invalid state %d\n", __func__, alarm_state);
return;
}
btc_msg_t msg = {0};
btc_alarm_args_t arg;
msg.sig = BTC_SIG_API_CALL;
msg.pid = BTC_PID_ALARM;
arg.cb = alarm->cb;
arg.cb_data = alarm->cb_data;
btc_transfer_context(&msg, &arg, sizeof(btc_alarm_args_t), NULL, NULL);
}
osi_alarm_t *osi_alarm_new(const char *alarm_name, osi_alarm_callback_t callback, void *data, period_ms_t timer_expire)
{
assert(alarm_mutex != NULL);
struct alarm_t *timer_id = NULL;
osi_mutex_lock(&alarm_mutex, OSI_MUTEX_MAX_TIMEOUT);
if (alarm_state != ALARM_STATE_OPEN) {
OSI_TRACE_ERROR("%s, invalid state %d\n", __func__, alarm_state);
timer_id = NULL;
goto end;
}
timer_id = alarm_cbs_lookfor_available();
if (!timer_id) {
OSI_TRACE_ERROR("%s alarm_cbs exhausted\n", __func__);
timer_id = NULL;
goto end;
}
esp_timer_create_args_t tca = {0};
tca.callback = (esp_timer_cb_t)alarm_cb_handler;
tca.arg = timer_id;
tca.dispatch_method = ESP_TIMER_TASK;
tca.name = alarm_name;
timer_id->cb = callback;
timer_id->cb_data = data;
timer_id->deadline_us = 0;
esp_err_t stat = esp_timer_create(&tca, &timer_id->alarm_hdl);
if (stat != ESP_OK) {
OSI_TRACE_ERROR("%s failed to create timer, err 0x%x\n", __func__, stat);
timer_id = NULL;
goto end;
}
end:
osi_mutex_unlock(&alarm_mutex);
return timer_id;
}
static osi_alarm_err_t alarm_free(osi_alarm_t *alarm)
{
if (!alarm || alarm->alarm_hdl == NULL) {
OSI_TRACE_ERROR("%s null\n", __func__);
return OSI_ALARM_ERR_INVALID_ARG;
}
esp_timer_stop(alarm->alarm_hdl);
esp_err_t stat = esp_timer_delete(alarm->alarm_hdl);
if (stat != ESP_OK) {
OSI_TRACE_ERROR("%s failed to delete timer, err 0x%x\n", __func__, stat);
return OSI_ALARM_ERR_FAIL;
}
memset(alarm, 0, sizeof(osi_alarm_t));
return OSI_ALARM_ERR_PASS;
}
void osi_alarm_free(osi_alarm_t *alarm)
{
assert(alarm_mutex != NULL);
osi_mutex_lock(&alarm_mutex, OSI_MUTEX_MAX_TIMEOUT);
if (alarm_state != ALARM_STATE_OPEN) {
OSI_TRACE_ERROR("%s, invalid state %d\n", __func__, alarm_state);
goto end;
}
alarm_free(alarm);
end:
osi_mutex_unlock(&alarm_mutex);
return;
}
static osi_alarm_err_t alarm_set(osi_alarm_t *alarm, period_ms_t timeout, bool is_periodic)
{
assert(alarm_mutex != NULL);
osi_alarm_err_t ret = OSI_ALARM_ERR_PASS;
osi_mutex_lock(&alarm_mutex, OSI_MUTEX_MAX_TIMEOUT);
if (alarm_state != ALARM_STATE_OPEN) {
OSI_TRACE_ERROR("%s, invalid state %d\n", __func__, alarm_state);
ret = OSI_ALARM_ERR_INVALID_STATE;
goto end;
}
if (!alarm || alarm->alarm_hdl == NULL) {
OSI_TRACE_ERROR("%s null\n", __func__);
ret = OSI_ALARM_ERR_INVALID_ARG;
goto end;
}
int64_t timeout_us = 1000 * (int64_t)timeout;
esp_err_t stat;
if (is_periodic) {
stat = esp_timer_start_periodic(alarm->alarm_hdl, (uint64_t)timeout_us);
} else {
stat = esp_timer_start_once(alarm->alarm_hdl, (uint64_t)timeout_us);
}
if (stat != ESP_OK) {
OSI_TRACE_ERROR("%s failed to start timer, err 0x%x\n", __func__, stat);
ret = OSI_ALARM_ERR_FAIL;
goto end;
}
alarm->deadline_us = is_periodic ? 0 : (timeout_us + esp_timer_get_time());
end:
osi_mutex_unlock(&alarm_mutex);
return ret;
}
osi_alarm_err_t osi_alarm_set(osi_alarm_t *alarm, period_ms_t timeout)
{
return alarm_set(alarm, timeout, FALSE);
}
osi_alarm_err_t osi_alarm_set_periodic(osi_alarm_t *alarm, period_ms_t period)
{
return alarm_set(alarm, period, TRUE);
}
osi_alarm_err_t osi_alarm_cancel(osi_alarm_t *alarm)
{
int ret = OSI_ALARM_ERR_PASS;
osi_mutex_lock(&alarm_mutex, OSI_MUTEX_MAX_TIMEOUT);
if (alarm_state != ALARM_STATE_OPEN) {
OSI_TRACE_ERROR("%s, invalid state %d\n", __func__, alarm_state);
ret = OSI_ALARM_ERR_INVALID_STATE;
goto end;
}
if (!alarm || alarm->alarm_hdl == NULL) {
OSI_TRACE_ERROR("%s null\n", __func__);
ret = OSI_ALARM_ERR_INVALID_ARG;
goto end;
}
esp_err_t stat = esp_timer_stop(alarm->alarm_hdl);
if (stat != ESP_OK) {
OSI_TRACE_DEBUG("%s failed to stop timer, err 0x%x\n", __func__, stat);
ret = OSI_ALARM_ERR_FAIL;
goto end;
}
end:
osi_mutex_unlock(&alarm_mutex);
return ret;
}
period_ms_t osi_alarm_get_remaining_ms(const osi_alarm_t *alarm)
{
assert(alarm_mutex != NULL);
int64_t dt_us = 0;
osi_mutex_lock(&alarm_mutex, OSI_MUTEX_MAX_TIMEOUT);
dt_us = alarm->deadline_us - esp_timer_get_time();
osi_mutex_unlock(&alarm_mutex);
return (dt_us > 0) ? (period_ms_t)(dt_us / 1000) : 0;
}
uint32_t osi_time_get_os_boottime_ms(void)
{
return (uint32_t)(esp_timer_get_time() / 1000);
}
bool osi_alarm_is_active(osi_alarm_t *alarm)
{
assert(alarm != NULL);
if (alarm->alarm_hdl != NULL) {
return esp_timer_is_active(alarm->alarm_hdl);
}
return false;
}
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