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core: Add matrix_clear() and default impl.
[max/tmk_keyboard.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 #ifdef PROTOCOL_LUFA
12 #include "lufa.h"
13 #endif
14
15
16 #define wdt_intr_enable(value)   \
17 __asm__ __volatile__ (  \
18     "in __tmp_reg__,__SREG__" "\n\t"    \
19     "cli" "\n\t"    \
20     "wdr" "\n\t"    \
21     "sts %0,%1" "\n\t"  \
22     "out __SREG__,__tmp_reg__" "\n\t"   \
23     "sts %0,%2" "\n\t" \
24     : /* no outputs */  \
25     : "M" (_SFR_MEM_ADDR(_WD_CONTROL_REG)), \
26     "r" (_BV(_WD_CHANGE_BIT) | _BV(WDE)), \
27     "r" ((uint8_t) ((value & 0x08 ? _WD_PS3_MASK : 0x00) | \
28         _BV(WDIE) | (value & 0x07)) ) \
29     : "r0"  \
30 )
31
32
33 /* Power down MCU with watchdog timer
34  * wdto: watchdog timer timeout defined in <avr/wdt.h>
35  *          WDTO_15MS
36  *          WDTO_30MS
37  *          WDTO_60MS
38  *          WDTO_120MS
39  *          WDTO_250MS
40  *          WDTO_500MS
41  *          WDTO_1S
42  *          WDTO_2S
43  *          WDTO_4S
44  *          WDTO_8S
45  */
46 static uint8_t wdt_timeout = 0;
47 static void power_down(uint8_t wdto)
48 {
49 #ifdef PROTOCOL_LUFA
50     if (USB_DeviceState == DEVICE_STATE_Configured) return;
51 #endif
52     wdt_timeout = wdto;
53
54     // Watchdog Interrupt Mode
55     wdt_intr_enable(wdto);
56
57     // TODO: more power saving
58     // See PicoPower application note
59     // - I/O port input with pullup
60     // - prescale clock
61     // - BOD disable
62     // - Power Reduction Register PRR
63     set_sleep_mode(SLEEP_MODE_PWR_DOWN);
64     sleep_enable();
65     sei();
66     sleep_cpu();
67     sleep_disable();
68
69     // Disable watchdog after sleep
70     wdt_disable();
71 }
72
73 static void standby(void)
74 {
75     set_sleep_mode(SLEEP_MODE_STANDBY);
76     sleep_enable();
77     sei();
78     sleep_cpu();
79     sleep_disable();
80 }
81
82 static void idle(void)
83 {
84     set_sleep_mode(SLEEP_MODE_IDLE);
85     sleep_enable();
86     sei();
87     sleep_cpu();
88     sleep_disable();
89 }
90
91
92 void suspend_idle(uint8_t time)
93 {
94     idle();
95 }
96
97 void suspend_power_down(void)
98 {
99 #ifdef SUSPEND_MODE_STANDBY
100     standby();
101 #elif defined(SUSPEND_MODE_IDLE)
102     idle();
103 #else
104     power_down(WDTO_15MS);
105 #endif
106 }
107
108 bool suspend_wakeup_condition(void)
109 {
110     matrix_power_up();
111     matrix_scan();
112     matrix_power_down();
113     for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
114         if (matrix_get_row(r)) return true;
115     }
116     return false;
117 }
118
119 // run immediately after wakeup
120 void suspend_wakeup_init(void)
121 {
122     // clear keyboard state
123     matrix_clear();
124     clear_keyboard();
125 #ifdef BACKLIGHT_ENABLE
126     backlight_init();
127 #endif
128 }
129
130 #ifndef NO_SUSPEND_POWER_DOWN
131 /* watchdog timeout */
132 ISR(WDT_vect)
133 {
134     // compensate timer for sleep
135     switch (wdt_timeout) {
136         case WDTO_15MS:
137             timer_count += 15 + 2;  // WDTO_15MS + 2(from observation)
138             break;
139         default:
140             ;
141     }
142 }
143 #endif