| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 <stdint.h> |
| #include <stddef.h> |
| #include <assert.h> |
| #include <stddef.h> |
| #include "syscfg/syscfg.h" |
| #include "os/os_cputime.h" |
| #include "controller/ble_phy.h" |
| #include "controller/ble_ll.h" |
| #include "controller/ble_ll_sched.h" |
| #include "controller/ble_ll_rfmgmt.h" |
| |
| #if MYNEWT_VAL(BLE_LL_RFMGMT_ENABLE_TIME) > 0 |
| |
| enum ble_ll_rfmgmt_state { |
| RFMGMT_STATE_OFF = 0, |
| RFMGMT_STATE_ENABLING = 1, |
| RFMGMT_STATE_ENABLED = 2, |
| }; |
| |
| struct ble_ll_rfmgmt_data { |
| enum ble_ll_rfmgmt_state state; |
| uint16_t ticks_to_enabled; |
| |
| struct hal_timer timer; |
| bool timer_scheduled; |
| uint32_t timer_scheduled_at; |
| |
| bool enable_scan; |
| bool enable_sched; |
| uint32_t enable_scan_at; |
| uint32_t enable_sched_at; |
| |
| uint32_t enabled_at; |
| |
| struct ble_npl_event release_ev; |
| }; |
| |
| static struct ble_ll_rfmgmt_data g_ble_ll_rfmgmt_data; |
| |
| static void |
| ble_ll_rfmgmt_enable(void) |
| { |
| OS_ASSERT_CRITICAL(); |
| |
| if (g_ble_ll_rfmgmt_data.state == RFMGMT_STATE_OFF) { |
| g_ble_ll_rfmgmt_data.state = RFMGMT_STATE_ENABLING; |
| g_ble_ll_rfmgmt_data.enabled_at = os_cputime_get32(); |
| ble_phy_rfclk_enable(); |
| } |
| } |
| |
| static void |
| ble_ll_rfmgmt_disable(void) |
| { |
| OS_ASSERT_CRITICAL(); |
| |
| if (g_ble_ll_rfmgmt_data.state != RFMGMT_STATE_OFF) { |
| ble_phy_rfclk_disable(); |
| g_ble_ll_rfmgmt_data.state = RFMGMT_STATE_OFF; |
| } |
| } |
| |
| static void |
| ble_ll_rfmgmt_timer_reschedule(void) |
| { |
| struct ble_ll_rfmgmt_data *rfmgmt = &g_ble_ll_rfmgmt_data; |
| uint32_t enable_at; |
| |
| /* Figure out when we need to enable RF */ |
| if (rfmgmt->enable_scan && rfmgmt->enable_sched) { |
| if (CPUTIME_LT(rfmgmt->enable_scan_at, rfmgmt->enable_sched_at)) { |
| enable_at = rfmgmt->enable_scan_at; |
| } else { |
| enable_at = rfmgmt->enable_sched_at; |
| } |
| } else if (rfmgmt->enable_scan) { |
| enable_at = rfmgmt->enable_scan_at; |
| } else if (rfmgmt->enable_sched) { |
| enable_at = rfmgmt->enable_sched_at; |
| } else { |
| rfmgmt->timer_scheduled = false; |
| os_cputime_timer_stop(&rfmgmt->timer); |
| return; |
| } |
| |
| if (rfmgmt->timer_scheduled) { |
| /* |
| * If there is timer already scheduled at the same time we do not need |
| * to do anything. Otherwise we need to stop timer and schedule it again |
| * regardless if it's earlier or later to make sure it fires at the time |
| * something expects it. |
| */ |
| |
| if (rfmgmt->timer_scheduled_at == enable_at) { |
| return; |
| } |
| |
| rfmgmt->timer_scheduled = false; |
| os_cputime_timer_stop(&rfmgmt->timer); |
| } |
| |
| /* |
| * In case timer was requested to be enabled before current time, just make |
| * sure it's enabled and assume caller can deal with this. This will happen |
| * if something is scheduled "now" since "enable_at" is in the past, but in |
| * such case it's absolutely harmless since we already have clock enabled |
| * and this will do nothing. |
| */ |
| if (CPUTIME_LEQ(enable_at, os_cputime_get32())) { |
| ble_ll_rfmgmt_enable(); |
| return; |
| } |
| |
| rfmgmt->timer_scheduled = true; |
| rfmgmt->timer_scheduled_at = enable_at; |
| os_cputime_timer_start(&rfmgmt->timer, enable_at); |
| } |
| |
| static void |
| ble_ll_rfmgmt_timer_exp(void *arg) |
| { |
| g_ble_ll_rfmgmt_data.timer_scheduled = false; |
| ble_ll_rfmgmt_enable(); |
| } |
| |
| static void |
| ble_ll_rfmgmt_release_ev(struct ble_npl_event *ev) |
| { |
| struct ble_ll_rfmgmt_data *rfmgmt = &g_ble_ll_rfmgmt_data; |
| uint32_t now; |
| bool can_disable; |
| uint8_t lls; |
| os_sr_t sr; |
| |
| OS_ENTER_CRITICAL(sr); |
| |
| now = os_cputime_get32(); |
| |
| can_disable = true; |
| lls = ble_ll_state_get(); |
| |
| if (rfmgmt->enable_scan && CPUTIME_GEQ(now, rfmgmt->enable_scan_at)) { |
| /* Blocked by scan */ |
| can_disable = false; |
| } else if (rfmgmt->enable_sched && CPUTIME_GEQ(now, rfmgmt->enable_sched_at)) { |
| /* Blocked by scheduler item */ |
| can_disable = false; |
| } else if (lls != BLE_LL_STATE_STANDBY) { |
| /* Blocked by LL state */ |
| can_disable = false; |
| } |
| |
| if (can_disable) { |
| ble_ll_rfmgmt_disable(); |
| } |
| |
| OS_EXIT_CRITICAL(sr); |
| } |
| |
| static uint32_t |
| ble_ll_rfmgmt_ticks_to_enabled(void) |
| { |
| struct ble_ll_rfmgmt_data *rfmgmt = &g_ble_ll_rfmgmt_data; |
| uint32_t rem_ticks; |
| uint32_t now; |
| |
| switch (rfmgmt->state) { |
| case RFMGMT_STATE_OFF: |
| rem_ticks = rfmgmt->ticks_to_enabled; |
| break; |
| case RFMGMT_STATE_ENABLING: |
| now = os_cputime_get32(); |
| if (CPUTIME_LT(now, rfmgmt->enabled_at + rfmgmt->ticks_to_enabled)) { |
| rem_ticks = rfmgmt->enabled_at + rfmgmt->ticks_to_enabled - now; |
| break; |
| } |
| rfmgmt->state = RFMGMT_STATE_ENABLED; |
| /* no break */ |
| case RFMGMT_STATE_ENABLED: |
| rem_ticks = 0; |
| break; |
| default: |
| BLE_LL_ASSERT(0); |
| rem_ticks = 0; |
| break; |
| } |
| |
| return rem_ticks; |
| } |
| |
| void |
| ble_ll_rfmgmt_init(void) |
| { |
| struct ble_ll_rfmgmt_data *rfmgmt = &g_ble_ll_rfmgmt_data; |
| |
| rfmgmt->state = RFMGMT_STATE_OFF; |
| |
| rfmgmt->ticks_to_enabled = |
| ble_ll_usecs_to_ticks_round_up(MYNEWT_VAL(BLE_LL_RFMGMT_ENABLE_TIME)); |
| |
| rfmgmt->timer_scheduled = false; |
| os_cputime_timer_init(&rfmgmt->timer, ble_ll_rfmgmt_timer_exp, NULL); |
| |
| ble_npl_event_init(&rfmgmt->release_ev, ble_ll_rfmgmt_release_ev, NULL); |
| } |
| |
| void |
| ble_ll_rfmgmt_reset(void) |
| { |
| struct ble_ll_rfmgmt_data *rfmgmt = &g_ble_ll_rfmgmt_data; |
| |
| rfmgmt->timer_scheduled = false; |
| rfmgmt->timer_scheduled_at = 0; |
| os_cputime_timer_stop(&rfmgmt->timer); |
| |
| ble_npl_eventq_remove(&g_ble_ll_data.ll_evq, &rfmgmt->release_ev); |
| |
| ble_ll_rfmgmt_disable(); |
| |
| rfmgmt->enable_scan = false; |
| rfmgmt->enable_scan_at = 0; |
| rfmgmt->enable_sched = false; |
| rfmgmt->enable_sched_at = 0; |
| |
| rfmgmt->enabled_at = 0; |
| } |
| |
| void |
| ble_ll_rfmgmt_scan_changed(bool enabled, uint32_t next_window) |
| { |
| struct ble_ll_rfmgmt_data *rfmgmt = &g_ble_ll_rfmgmt_data; |
| os_sr_t sr; |
| |
| OS_ENTER_CRITICAL(sr); |
| |
| rfmgmt->enable_scan = enabled; |
| rfmgmt->enable_scan_at = next_window - rfmgmt->ticks_to_enabled; |
| |
| ble_ll_rfmgmt_timer_reschedule(); |
| |
| OS_EXIT_CRITICAL(sr); |
| } |
| |
| void |
| ble_ll_rfmgmt_sched_changed(struct ble_ll_sched_item *first) |
| { |
| struct ble_ll_rfmgmt_data *rfmgmt = &g_ble_ll_rfmgmt_data; |
| os_sr_t sr; |
| |
| OS_ENTER_CRITICAL(sr); |
| |
| rfmgmt->enable_sched = (first != NULL); |
| if (first) { |
| rfmgmt->enable_sched_at = first->start_time - rfmgmt->ticks_to_enabled; |
| } |
| |
| ble_ll_rfmgmt_timer_reschedule(); |
| |
| OS_EXIT_CRITICAL(sr); |
| } |
| |
| void |
| ble_ll_rfmgmt_release(void) |
| { |
| struct ble_ll_rfmgmt_data *rfmgmt = &g_ble_ll_rfmgmt_data; |
| os_sr_t sr; |
| |
| OS_ENTER_CRITICAL(sr); |
| |
| ble_npl_eventq_remove(&g_ble_ll_data.ll_evq, &rfmgmt->release_ev); |
| |
| if (g_ble_ll_rfmgmt_data.state != RFMGMT_STATE_OFF) { |
| ble_npl_eventq_put(&g_ble_ll_data.ll_evq, &rfmgmt->release_ev); |
| } |
| |
| OS_EXIT_CRITICAL(sr); |
| } |
| |
| uint32_t |
| ble_ll_rfmgmt_enable_now(void) |
| { |
| struct ble_ll_rfmgmt_data *rfmgmt = &g_ble_ll_rfmgmt_data; |
| uint32_t enabled_at; |
| os_sr_t sr; |
| |
| OS_ENTER_CRITICAL(sr); |
| |
| ble_ll_rfmgmt_enable(); |
| |
| if (rfmgmt->state == RFMGMT_STATE_ENABLED) { |
| enabled_at = os_cputime_get32(); |
| } else { |
| enabled_at = rfmgmt->enabled_at + rfmgmt->ticks_to_enabled + 1; |
| } |
| |
| OS_EXIT_CRITICAL(sr); |
| |
| return enabled_at; |
| } |
| |
| bool |
| ble_ll_rfmgmt_is_enabled(void) |
| { |
| bool ret; |
| |
| OS_ASSERT_CRITICAL(); |
| |
| ret = ble_ll_rfmgmt_ticks_to_enabled() == 0; |
| |
| return ret; |
| } |
| |
| #else |
| |
| void |
| ble_ll_rfmgmt_init(void) |
| { |
| static bool enabled = false; |
| |
| if (!enabled) { |
| ble_phy_rfclk_enable(); |
| } |
| |
| enabled = true; |
| } |
| |
| #endif |