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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>
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1 changed files with 46 additions and 3 deletions
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@ -5,26 +5,69 @@
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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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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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debug("boot mode %x.\n", boot_mode);
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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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printf("enter fastboot!\n");
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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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printf("enter UMS!\n");
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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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