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rockchip: check download key before bootup 

Enter download mode if the download key pressed.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
[Converted printfs in boot_mode.c to debug/pr_err:]
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
This commit is contained in:
Andy Yan 2017-10-11 15:01:31 +08:00 committed by Philipp Tomsich
parent b4d23f7643
commit ecb103bf68
1 changed files with 46 additions and 3 deletions
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49
arch/arm/mach-rockchip/boot_mode.c
View File

@ -5,26 +5,69 @@
*/ */
#include <common.h> #include <common.h>
#include <adc.h>
#include <asm/io.h> #include <asm/io.h>
#include <asm/arch/boot_mode.h> #include <asm/arch/boot_mode.h>
void set_back_to_bootrom_dnl_flag(void)
{
writel(BOOT_BROM_DOWNLOAD, CONFIG_ROCKCHIP_BOOT_MODE_REG);
}
/*
* detect download key status by adc, most rockchip
* based boards use adc sample the download key status,
* but there are also some use gpio. So it's better to
* make this a weak function that can be override by
* some special boards.
*/
#define KEY_DOWN_MIN_VAL 0
#define KEY_DOWN_MAX_VAL 30
__weak int rockchip_dnl_key_pressed(void)
{
unsigned int val;
if (adc_channel_single_shot("saradc", 1, &val)) {
pr_err("%s: adc_channel_single_shot fail!\n", __func__);
return false;
}
if ((val >= KEY_DOWN_MIN_VAL) && (val <= KEY_DOWN_MAX_VAL))
return true;
else
return false;
}
void rockchip_dnl_mode_check(void)
{
if (rockchip_dnl_key_pressed()) {
printf("download key pressed, entering download mode...");
set_back_to_bootrom_dnl_flag();
do_reset(NULL, 0, 0, NULL);
}
}
int setup_boot_mode(void) int setup_boot_mode(void)
{ {
void *reg = (void *)CONFIG_ROCKCHIP_BOOT_MODE_REG; void *reg = (void *)CONFIG_ROCKCHIP_BOOT_MODE_REG;
int boot_mode = readl(reg); int boot_mode = readl(reg);
debug("boot mode %x.\n", boot_mode); rockchip_dnl_mode_check();
boot_mode = readl(reg);
debug("%s: boot mode 0x%08x\n", __func__, boot_mode);
/* Clear boot mode */ /* Clear boot mode */
writel(BOOT_NORMAL, reg); writel(BOOT_NORMAL, reg);
switch (boot_mode) { switch (boot_mode) {
case BOOT_FASTBOOT: case BOOT_FASTBOOT:
printf("enter fastboot!\n"); debug("%s: enter fastboot!\n", __func__);
env_set("preboot", "setenv preboot; fastboot usb0"); env_set("preboot", "setenv preboot; fastboot usb0");
break; break;
case BOOT_UMS: case BOOT_UMS:
printf("enter UMS!\n"); debug("%s: enter UMS!\n", __func__);
env_set("preboot", "setenv preboot; ums mmc 0"); env_set("preboot", "setenv preboot; ums mmc 0");
break; break;
} }