u-boot/arch/arm/mach-rockchip/boot_mode.c
Simon Glass 0d968ceb1f rockchip: Drop call to rockchip_dnl_mode_check() for now
This function causes a 5-second delay and stops the display working on
minnie. This code should be in a driver and should only be enabled by
a device-tree property, so that it does not affect devices which do not
have this feature.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
2019-02-01 16:59:10 +01:00

92 lines
1.9 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2016 Rockchip Electronics Co., Ltd
*/
#include <common.h>
#include <adc.h>
#include <asm/io.h>
#include <asm/arch/boot_mode.h>
#if (CONFIG_ROCKCHIP_BOOT_MODE_REG == 0)
int setup_boot_mode(void)
{
return 0;
}
#else
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)
{
void *reg = (void *)CONFIG_ROCKCHIP_BOOT_MODE_REG;
int boot_mode = readl(reg);
/*
* This should be handled using a driver-tree property and a suitable
* driver which can read the appropriate settings. As it is, this
* breaks chromebook_minnie.\
*
* rockchip_dnl_mode_check();
*/
boot_mode = readl(reg);
debug("%s: boot mode 0x%08x\n", __func__, boot_mode);
/* Clear boot mode */
writel(BOOT_NORMAL, reg);
switch (boot_mode) {
case BOOT_FASTBOOT:
debug("%s: enter fastboot!\n", __func__);
env_set("preboot", "setenv preboot; fastboot usb0");
break;
case BOOT_UMS:
debug("%s: enter UMS!\n", __func__);
env_set("preboot", "setenv preboot; ums mmc 0");
break;
}
return 0;
}
#endif