sdk-hwV1.3/lichee/brandy-2.0/spl/drivers/lrkey.c

92 lines
1.8 KiB
C

/*
* (C) Copyright 2016
* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
* zhouhuacai <zhouhuacai@allwinnertech.com>
*
*/
#include <common.h>
#include <asm/io.h>
#include <arch/physical_key.h>
#include <arch/clock.h>
#include <arch/axp.h>
__attribute__((section(".data")))
static uint32_t keyen_flag = 1;
__weak int sunxi_clock_init_key(void)
{
return 0;
}
int sunxi_key_init(void)
{
struct sunxi_lradc *sunxi_key_base = (struct sunxi_lradc *)SUNXI_KEYADC_BASE;
uint reg_val = 0;
sunxi_clock_init_key();
reg_val = sunxi_key_base->ctrl;
reg_val &= ~((7 << 1) | (0xffU << 24));
reg_val |= LRADC_HOLD_EN;
reg_val |= LRADC_EN;
sunxi_key_base->ctrl = reg_val;
/* disable all key irq */
sunxi_key_base->intc = 0;
sunxi_key_base->ints = 0x1f1f;
return 0;
}
int sunxi_key_read(void)
{
u32 ints;
int key = -1;
struct sunxi_lradc *sunxi_key_base = (struct sunxi_lradc *)SUNXI_LRADC_BASE;
if (!keyen_flag) {
return -1;
}
ints = sunxi_key_base->ints;
/* clear the pending data */
sunxi_key_base->ints |= (ints & 0x1f);
/* if there is already data pending,
read it */
mdelay(10);
if (ints & ADC0_KEYDOWN_PENDING) {
if (ints & ADC0_DATA_PENDING) {
key = sunxi_key_base->data0 & 0x3f;
}
} else if (ints & ADC0_DATA_PENDING) {
key = sunxi_key_base->data0 & 0x3f;
}
if (key > 0) {
printf("key pressed value=0x%x\n", key);
}
return key;
}
int check_update_key(u16 *key_input)
{
int power_key_cnt = 0;
u32 time_tick = get_sys_ticks();
*key_input = sunxi_key_read();
while (sunxi_key_read() > 0) {
if (probe_power_key() > 0)
power_key_cnt++;
if (power_key_cnt >= 3)
return -1;
if ((get_sys_ticks() - time_tick) > 3000)
break;
}
if ((!power_key_cnt) && (get_power_source() != AXP_BOOT_SOURCE_BUTTON))
*key_input = 0;
return 0;
}