mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-25 04:23:46 +00:00
1e94b46f73
This old patch was marked as deferred. Bring it back to life, to continue towards the removal of common.h Move this out of the common header and include it only where needed. Signed-off-by: Simon Glass <sjg@chromium.org>
110 lines
2.2 KiB
C
110 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2016 Rockchip Electronics Co., Ltd
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*/
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#include <common.h>
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#include <adc.h>
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#include <command.h>
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#include <env.h>
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#include <log.h>
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#include <asm/io.h>
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#include <asm/arch-rockchip/boot_mode.h>
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#include <dm/device.h>
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#include <dm/uclass.h>
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#include <linux/printk.h>
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#if (CONFIG_ROCKCHIP_BOOT_MODE_REG == 0)
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int setup_boot_mode(void)
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{
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return 0;
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}
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#else
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void set_back_to_bootrom_dnl_flag(void)
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{
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writel(BOOT_BROM_DOWNLOAD, CONFIG_ROCKCHIP_BOOT_MODE_REG);
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}
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/*
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* detect download key status by adc, most rockchip
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* based boards use adc sample the download key status,
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* but there are also some use gpio. So it's better to
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* make this a weak function that can be override by
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* some special boards.
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*/
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#define KEY_DOWN_MIN_VAL 0
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#define KEY_DOWN_MAX_VAL 30
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__weak int rockchip_dnl_key_pressed(void)
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{
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unsigned int val;
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struct udevice *dev;
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struct uclass *uc;
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int ret;
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ret = uclass_get(UCLASS_ADC, &uc);
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if (ret)
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return false;
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ret = -ENODEV;
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uclass_foreach_dev(dev, uc) {
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if (!strncmp(dev->name, "saradc", 6)) {
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ret = adc_channel_single_shot(dev->name, 1, &val);
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break;
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}
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}
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if (ret == -ENODEV) {
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pr_warn("%s: no saradc device found\n", __func__);
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return false;
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} else if (ret) {
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pr_err("%s: adc_channel_single_shot fail!\n", __func__);
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return false;
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}
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if ((val >= KEY_DOWN_MIN_VAL) && (val <= KEY_DOWN_MAX_VAL))
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return true;
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else
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return false;
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}
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void rockchip_dnl_mode_check(void)
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{
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if (rockchip_dnl_key_pressed()) {
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printf("download key pressed, entering download mode...");
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set_back_to_bootrom_dnl_flag();
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do_reset(NULL, 0, 0, NULL);
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}
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}
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int setup_boot_mode(void)
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{
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void *reg = (void *)CONFIG_ROCKCHIP_BOOT_MODE_REG;
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int boot_mode = readl(reg);
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rockchip_dnl_mode_check();
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boot_mode = readl(reg);
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debug("%s: boot mode 0x%08x\n", __func__, boot_mode);
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/* Clear boot mode */
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writel(BOOT_NORMAL, reg);
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switch (boot_mode) {
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case BOOT_FASTBOOT:
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debug("%s: enter fastboot!\n", __func__);
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env_set("preboot", "setenv preboot; fastboot usb 0");
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break;
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case BOOT_UMS:
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debug("%s: enter UMS!\n", __func__);
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env_set("preboot", "setenv preboot; ums mmc 0");
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break;
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}
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return 0;
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}
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#endif
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