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Fixed NO_SUSPEND_POWER_DOWN handling
[qmk_firmware.git] / tmk_core / common / avr / suspend.c
1 #include <stdbool.h>
2 #include <avr/sleep.h>
3 #include <avr/wdt.h>
4 #include <avr/interrupt.h>
5 #include "matrix.h"
6 #include "action.h"
7 #include "backlight.h"
8 #include "suspend_avr.h"
9 #include "suspend.h"
10 #include "timer.h"
11 #include "led.h"
12
13 #ifdef PROTOCOL_LUFA
14         #include "lufa.h"
15 #endif
16
17 #ifdef AUDIO_ENABLE
18     #include "audio.h"
19 #endif /* AUDIO_ENABLE */
20
21
22
23 #define wdt_intr_enable(value)   \
24 __asm__ __volatile__ (  \
25     "in __tmp_reg__,__SREG__" "\n\t"    \
26     "cli" "\n\t"    \
27     "wdr" "\n\t"    \
28     "sts %0,%1" "\n\t"  \
29     "out __SREG__,__tmp_reg__" "\n\t"   \
30     "sts %0,%2" "\n\t" \
31     : /* no outputs */  \
32     : "M" (_SFR_MEM_ADDR(_WD_CONTROL_REG)), \
33     "r" (_BV(_WD_CHANGE_BIT) | _BV(WDE)), \
34     "r" ((uint8_t) ((value & 0x08 ? _WD_PS3_MASK : 0x00) | \
35         _BV(WDIE) | (value & 0x07)) ) \
36     : "r0"  \
37 )
38
39
40 void suspend_idle(uint8_t time)
41 {
42     cli();
43     set_sleep_mode(SLEEP_MODE_IDLE);
44     sleep_enable();
45     sei();
46     sleep_cpu();
47     sleep_disable();
48 }
49
50 #ifndef NO_SUSPEND_POWER_DOWN
51 /* Power down MCU with watchdog timer
52  * wdto: watchdog timer timeout defined in <avr/wdt.h>
53  *          WDTO_15MS
54  *          WDTO_30MS
55  *          WDTO_60MS
56  *          WDTO_120MS
57  *          WDTO_250MS
58  *          WDTO_500MS
59  *          WDTO_1S
60  *          WDTO_2S
61  *          WDTO_4S
62  *          WDTO_8S
63  */
64 static uint8_t wdt_timeout = 0;
65
66 static void power_down(uint8_t wdto)
67 {
68 #ifdef PROTOCOL_LUFA
69     if (USB_DeviceState == DEVICE_STATE_Configured) return;
70 #endif
71     wdt_timeout = wdto;
72
73     // Watchdog Interrupt Mode
74     wdt_intr_enable(wdto);
75
76 #ifdef BACKLIGHT_ENABLE
77         backlight_set(0);
78 #endif
79
80         // Turn off LED indicators
81         led_set(0);
82
83         #ifdef AUDIO_ENABLE
84         // This sometimes disables the start-up noise, so it's been disabled
85                 // stop_all_notes();
86         #endif /* AUDIO_ENABLE */
87
88     // TODO: more power saving
89     // See PicoPower application note
90     // - I/O port input with pullup
91     // - prescale clock
92     // - BOD disable
93     // - Power Reduction Register PRR
94     set_sleep_mode(SLEEP_MODE_PWR_DOWN);
95     sleep_enable();
96     sei();
97     sleep_cpu();
98     sleep_disable();
99
100     // Disable watchdog after sleep
101     wdt_disable();
102 }
103 #endif
104
105 void suspend_power_down(void)
106 {
107 #ifndef NO_SUSPEND_POWER_DOWN
108     power_down(WDTO_15MS);
109 #endif
110 }
111
112 __attribute__ ((weak)) void matrix_power_up(void) {}
113 __attribute__ ((weak)) void matrix_power_down(void) {}
114 bool suspend_wakeup_condition(void)
115 {
116     matrix_power_up();
117     matrix_scan();
118     matrix_power_down();
119     for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
120         if (matrix_get_row(r)) return true;
121     }
122      return false;
123 }
124
125 // run immediately after wakeup
126 void suspend_wakeup_init(void)
127 {
128     // clear keyboard state
129     clear_keyboard();
130 #ifdef BACKLIGHT_ENABLE
131     backlight_init();
132 #endif
133         led_set(host_keyboard_leds());
134 }
135
136 #ifndef NO_SUSPEND_POWER_DOWN
137 /* watchdog timeout */
138 ISR(WDT_vect)
139 {
140     // compensate timer for sleep
141     switch (wdt_timeout) {
142         case WDTO_15MS:
143             timer_count += 15 + 2;  // WDTO_15MS + 2(from observation)
144             break;
145         default:
146             ;
147     }
148 }
149 #endif