recovery.c
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/*
* Copyright (C) 2010-2016 Freescale Semiconductor, Inc. All Rights Reserved.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <malloc.h>
#include <recovery.h>
#ifdef CONFIG_MXC_KPD
#include <mxc_keyb.h>
#endif
#include <asm/imx-common/boot_mode.h>
#ifdef CONFIG_MXC_KPD
#define PRESSED_VOL_DOWN 0x01
#define PRESSED_POWER 0x02
#define RECOVERY_KEY_MASK (PRESSED_VOL_DOWN | PRESSED_POWER)
inline int test_key(int value, struct kpp_key_info *ki)
{
return (ki->val == value) && (ki->evt == KDepress);
}
int check_key_pressing(void)
{
struct kpp_key_info *key_info = NULL;
int state = 0, keys, i;
int ret = 0;
mxc_kpp_init();
/* due to glitch suppression circuit,
wait sometime to let all keys scanned. */
udelay(1000);
keys = mxc_kpp_getc(&key_info);
printf("Detecting VOL_DOWN+POWER key for recovery(%d:%d) ...\n",
keys, keys ? key_info->val : 0);
if (keys > 1) {
for (i = 0; i < keys; i++) {
if (test_key(CONFIG_POWER_KEY, &key_info[i]))
state |= PRESSED_POWER;
else if (test_key(CONFIG_VOL_DOWN_KEY, &key_info[i]))
state |= PRESSED_VOL_DOWN;
}
}
if ((state & RECOVERY_KEY_MASK) == RECOVERY_KEY_MASK)
ret = 1;
if (key_info)
free(key_info);
return ret;
}
#else
/* If not using mxc keypad, currently we will detect power key on board */
int check_key_pressing(void)
{
return 0;
}
#endif
void setup_recovery_env(void)
{
board_recovery_setup();
}
/* export to lib_arm/board.c */
void check_recovery_mode(void)
{
if (check_key_pressing()) {
puts("Fastboot: Recovery key pressing got!\n");
setup_recovery_env();
} else if (check_recovery_cmd_file()) {
puts("Fastboot: Recovery command file found!\n");
setup_recovery_env();
} else {
puts("Fastboot: Normal\n");
}
}