[5d0f0de4] | 1 | /* |
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| 2 | * Copyright (c) 2016 embedded brains GmbH. All rights reserved. |
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| 3 | * |
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| 4 | * embedded brains GmbH |
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| 5 | * Dornierstr. 4 |
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| 6 | * 82178 Puchheim |
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| 7 | * Germany |
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| 8 | * <rtems@embedded-brains.de> |
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| 9 | * |
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| 10 | * The license and distribution terms for this file may be |
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| 11 | * found in the file LICENSE in this distribution or at |
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| 12 | * http://www.rtems.org/license/LICENSE. |
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| 13 | */ |
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| 14 | |
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| 15 | #include <bsp.h> |
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| 16 | #include <bsp/power.h> |
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| 17 | #include <bsp/irq.h> |
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| 18 | |
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| 19 | #include <libchip/chip.h> |
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| 20 | |
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[ee36616] | 21 | #define ATSAM_ENABLE_ALARM_INTERRUPT RTC_IER_ALREN |
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[5d0f0de4] | 22 | |
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[ee36616] | 23 | static void set_rtc_alarm_interrupt(uint32_t interval) |
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[5d0f0de4] | 24 | { |
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| 25 | Rtc *rtc = RTC; |
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[ee36616] | 26 | uint8_t hour; |
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| 27 | uint8_t minute; |
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| 28 | uint8_t second; |
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| 29 | uint32_t time; |
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[5d0f0de4] | 30 | |
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| 31 | /* Clear current status register */ |
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| 32 | RTC_ClearSCCR(rtc, 0x3F); |
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| 33 | |
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[ee36616] | 34 | RTC_GetTime(rtc, &hour, &minute, &second); |
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| 35 | |
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| 36 | time = UINT32_C(3600) * hour + UINT32_C(60) * minute + second; |
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| 37 | time = (time + interval) % (UINT32_C(24) * 3600); |
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| 38 | |
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| 39 | second = (uint8_t) (time % 60); |
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| 40 | minute = (uint8_t) ((time / 60) % 60); |
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| 41 | hour = (uint8_t) (time / 3600); |
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| 42 | |
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| 43 | if (interval < 60) { |
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| 44 | RTC_SetTimeAlarm(rtc, NULL, NULL, &second); |
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| 45 | } else if (interval < 3600) { |
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| 46 | RTC_SetTimeAlarm(rtc, NULL, &minute, &second); |
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| 47 | } else { |
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| 48 | RTC_SetTimeAlarm(rtc, &hour, &minute, &second); |
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| 49 | } |
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[5d0f0de4] | 50 | |
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| 51 | RTC_EnableIt(rtc, ATSAM_ENABLE_ALARM_INTERRUPT); |
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| 52 | } |
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| 53 | |
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| 54 | static void rtc_interrupt_handler(void *arg) |
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| 55 | { |
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| 56 | atsam_power_data_rtc_driver *rtc_data; |
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| 57 | |
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| 58 | rtc_data = (atsam_power_data_rtc_driver *)arg; |
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| 59 | set_rtc_alarm_interrupt(rtc_data->interval); |
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| 60 | } |
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| 61 | |
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| 62 | static void rtc_alarm_handler(void *arg) |
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| 63 | { |
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| 64 | Rtc *rtc = RTC; |
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| 65 | rtems_status_code sc; |
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| 66 | |
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| 67 | /* Clear current status register */ |
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| 68 | RTC_ClearSCCR(rtc, 0x3F); |
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| 69 | |
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| 70 | /* Switch off all RTC interrupts */ |
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| 71 | RTC_DisableIt(rtc, 0x1F); |
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| 72 | |
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| 73 | /* Install RTC interrupt handler */ |
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| 74 | sc = rtems_interrupt_handler_install(RTC_IRQn, |
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| 75 | "RTC", |
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| 76 | RTEMS_INTERRUPT_UNIQUE, |
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| 77 | rtc_interrupt_handler, |
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| 78 | arg |
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| 79 | ); |
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| 80 | assert(sc == RTEMS_SUCCESSFUL); |
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| 81 | } |
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| 82 | |
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| 83 | static void set_time(void) |
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| 84 | { |
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| 85 | rtems_time_of_day tod; |
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| 86 | rtems_status_code sc; |
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| 87 | |
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| 88 | atsam_rtc_get_time(&tod); |
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| 89 | sc = rtems_clock_set(&tod); |
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| 90 | assert(sc == RTEMS_SUCCESSFUL); |
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| 91 | } |
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| 92 | |
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| 93 | void atsam_power_handler_rtc_driver( |
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| 94 | const atsam_power_control *control, |
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| 95 | atsam_power_state state |
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| 96 | ) |
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| 97 | { |
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| 98 | atsam_power_data_rtc_driver *rtc_data; |
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| 99 | Rtc *rtc = RTC; |
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| 100 | |
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| 101 | rtc_data = (atsam_power_data_rtc_driver *)control->data.arg; |
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| 102 | |
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| 103 | switch (state) { |
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| 104 | case ATSAM_POWER_ON: |
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| 105 | RTC_DisableIt(rtc, ATSAM_ENABLE_ALARM_INTERRUPT); |
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| 106 | set_time(); |
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| 107 | break; |
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| 108 | case ATSAM_POWER_OFF: |
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| 109 | set_rtc_alarm_interrupt(rtc_data->interval); |
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| 110 | break; |
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| 111 | case ATSAM_POWER_INIT: |
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| 112 | rtc_alarm_handler(rtc_data); |
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| 113 | break; |
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| 114 | default: |
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| 115 | break; |
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| 116 | } |
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| 117 | } |
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