From: Klaus Goger klaus.goger@theobroma-systems.com
The order distroboot searches for a boot.scr is fixed at compile time. To make BIOS_DISABLE work as expected and boot from mmc1 instead of mmc0 if enabled, we need to change the environment at runtime. Especially as commit: 482cf22333 ("rockchip: rk3399-puma: add boot-on regulator to override BIOS_DISABLE") enables the eMMC in U-Boot even if BIOS_DISABLE is active.
Signed-off-by: Klaus Goger klaus.goger@theobroma-systems.com Signed-off-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com
---
board/theobroma-systems/puma_rk3399/puma-rk3399.c | 74 +++++++++++++++++++++++ 1 file changed, 74 insertions(+)
diff --git a/board/theobroma-systems/puma_rk3399/puma-rk3399.c b/board/theobroma-systems/puma_rk3399/puma-rk3399.c index 6af9411..573e691 100644 --- a/board/theobroma-systems/puma_rk3399/puma-rk3399.c +++ b/board/theobroma-systems/puma_rk3399/puma-rk3399.c @@ -196,11 +196,85 @@ static void setup_iodomain(void) rk_setreg(&grf->io_vsel, 1 << GRF_IO_VSEL_GPIO4CD_SHIFT); }
+/* + * Swap mmc0 and mmc1 in boot_targets if booted from SD-Card. + * + * If bootsource is uSD-card we can assume that we want to use the + * SD-Card instead of the eMMC as first boot_target for distroboot. + * We only want to swap the defaults and not any custom environment a + * user has set. We exit early if a changed boot_targets environment + * is detected. + */ +static int setup_boottargets(void) +{ + const char *boot_device = + ofnode_get_chosen_prop("u-boot,spl-boot-device"); + char *env_default, *env; + + if (!boot_device) { + debug("%s: /chosen/u-boot,spl-boot-device not set\n", + __func__); + return -1; + } + debug("%s: booted from %s\n", __func__, boot_device); + + env_default = env_get_default("boot_targets"); + env = env_get("boot_targets"); + if (!env) { + debug("%s: boot_targets does not exist\n", __func__); + return -1; + } + debug("%s: boot_targets current: %s - default: %s\n", + __func__, env, env_default); + + if (strcmp(env_default, env) != 0) { + debug("%s: boot_targets not default, don't change it\n", + __func__); + return 0; + } + + /* + * Only run, if booting from mmc1 (i.e. /dwmmc@fe320000) and + * only consider cases where the default boot-order first + * tries to boot from mmc0 (eMMC) and then from mmc1 + * (i.e. external SD). + * + * In other words: the SD card will be moved to earlier in the + * order, if U-Boot was also loaded from the SD-card. + */ + if (!strcmp(boot_device, "/dwmmc@fe320000")) { + char *mmc0, *mmc1; + + debug("%s: booted from SD-Card\n", __func__); + mmc0 = strstr(env, "mmc0"); + mmc1 = strstr(env, "mmc1"); + + if (!mmc0 || !mmc1) { + debug("%s: only one mmc boot_target found\n", __func__); + return -1; + } + + /* + * If mmc0 comes first in the boot order, we need to change + * the strings to make mmc1 first. + */ + if (mmc0 < mmc1) { + mmc0[3] = '1'; + mmc1[3] = '0'; + debug("%s: set boot_targets to: %s\n", __func__, env); + env_set("boot_targets", env); + } + } + + return 0; +} + int misc_init_r(void) { setup_serial(); setup_macaddr(); setup_iodomain(); + setup_boottargets();
return 0; }