mirror of
https://source.denx.de/u-boot/u-boot.git
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a2893baa47
Due to a final resolution not coming up in time for 2019.04 and following the consensus on the discussion, we'll keep this around for 2019.04 after all. This reverts commit 0d968ceb1ff63b0d220a571f438f0d5fe6350e88.
87 lines
1.7 KiB
C
87 lines
1.7 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 <asm/io.h>
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#include <asm/arch/boot_mode.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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if (adc_channel_single_shot("saradc", 1, &val)) {
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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 usb0");
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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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