From: Quentin Schulz quentin.schulz@theobroma-systems.com
BOOT_DEVICE_* is set by spl_node_to_boot_device() depending on the block device number associated with the MMC device the SPL used to load U-Boot proper from. It is NOT related to the mmc alias in the Device Tree.
For SPI flashes, all SPI flashes will return BOOT_DEVICE_SPI so there's currently no way to know from which one the SPL loaded U-Boot proper from. Therefore, let's just find the first valid candidate in /chosen/u-boot,spl-boot-order that is a SPI flash and return that path. This is a best effort.
While the original implementation may have worked, using the exact same mechanism but in inverted fashion makes it less likely to have surprising corner-cases or side-effects.
A nice side-effect is that all existing and future Rockchip SoCs now automatically have their /chosen/u-boot,spl-boot-device set.
Cc: Quentin Schulz foss+uboot@0leil.net Reviewed-by: Kever Yang kever.yang@rock-chips.com Signed-off-by: Quentin Schulz quentin.schulz@theobroma-systems.com --- arch/arm/mach-rockchip/px30/px30.c | 7 --- arch/arm/mach-rockchip/rk3399/rk3399.c | 6 -- arch/arm/mach-rockchip/spl-boot-order.c | 98 +++++++++++++++++++++++++++------ 3 files changed, 80 insertions(+), 31 deletions(-)
diff --git a/arch/arm/mach-rockchip/px30/px30.c b/arch/arm/mach-rockchip/px30/px30.c index 7676adcb044..fc7456e680c 100644 --- a/arch/arm/mach-rockchip/px30/px30.c +++ b/arch/arm/mach-rockchip/px30/px30.c @@ -443,10 +443,3 @@ void board_debug_uart_init(void) #endif /* CONFIG_DEBUG_UART_BASE && CONFIG_DEBUG_UART_BASE == ... */ } #endif /* CONFIG_DEBUG_UART_BOARD_INIT */ - -#if defined(CONFIG_SPL_BUILD) && !defined(CONFIG_TPL_BUILD) -const char * const spl_boot_devices[BOOT_DEVICE_NONE + 1] = { - [BOOT_DEVICE_MMC2] = "/mmc@ff370000", - [BOOT_DEVICE_MMC1] = "/mmc@ff390000", -}; -#endif diff --git a/arch/arm/mach-rockchip/rk3399/rk3399.c b/arch/arm/mach-rockchip/rk3399/rk3399.c index 6929de5603c..801a4a6662e 100644 --- a/arch/arm/mach-rockchip/rk3399/rk3399.c +++ b/arch/arm/mach-rockchip/rk3399/rk3399.c @@ -175,12 +175,6 @@ void board_debug_uart_init(void) #endif
#if defined(CONFIG_SPL_BUILD) && !defined(CONFIG_TPL_BUILD) -const char * const spl_boot_devices[BOOT_DEVICE_NONE + 1] = { - [BOOT_DEVICE_MMC2] = "/mmc@fe320000", - [BOOT_DEVICE_MMC1] = "/mmc@fe330000", - [BOOT_DEVICE_SPI] = "/spi@ff1d0000/flash@0", -}; - static void rk3399_force_power_on_reset(void) { ofnode node; diff --git a/arch/arm/mach-rockchip/spl-boot-order.c b/arch/arm/mach-rockchip/spl-boot-order.c index 0cd3da20c95..2c39a215c10 100644 --- a/arch/arm/mach-rockchip/spl-boot-order.c +++ b/arch/arm/mach-rockchip/spl-boot-order.c @@ -10,6 +10,7 @@ #include <mmc.h> #include <spl.h> #include <asm/global_data.h> +#include <dm/uclass-internal.h>
#if CONFIG_IS_ENABLED(OF_LIBFDT) /** @@ -163,30 +164,91 @@ void board_boot_order(u32 *spl_boot_list) spl_boot_list[0] = spl_boot_device(); }
-__weak const char * const spl_boot_devices[BOOT_DEVICE_NONE + 1] = {}; - -const char *spl_decode_boot_device(u32 boot_device) +int spl_decode_boot_device(u32 boot_device, char *buf, size_t buflen) { - const char *spl_bootdevice_ofpath = NULL; + struct udevice *dev; +#if CONFIG_IS_ENABLED(BLK) + int dev_num; +#endif + int ret; + + if (boot_device == BOOT_DEVICE_SPI) { + /* Revert spl_node_to_boot_device() logic to find appropriate SPI flash device */ + + /* + * Devices with multiple SPI flash devices will take the first SPI flash found in + * /chosen/u-boot,spl-boot-order. + */ + const void *blob = gd->fdt_blob; + int chosen_node = fdt_path_offset(blob, "/chosen"); + int elem; + int node; + const char *conf; + + if (chosen_node < 0) { + debug("%s: /chosen not found\n", __func__); + return -ENODEV; + } + + for (elem = 0; + (conf = fdt_stringlist_get(blob, chosen_node, + "u-boot,spl-boot-order", elem, NULL)); + elem++) { + const char *alias; + + /* Handle the case of 'same device the SPL was loaded from' */ + if (strncmp(conf, "same-as-spl", 11) == 0) { + conf = board_spl_was_booted_from(); + if (!conf) + continue; + } + + /* First check if the list element is an alias */ + alias = fdt_get_alias(blob, conf); + if (alias) + conf = alias; + + /* Try to resolve the config item (or alias) as a path */ + node = fdt_path_offset(blob, conf); + if (node < 0) { + debug("%s: could not find %s in FDT\n", __func__, conf); + continue; + }
- if (boot_device < ARRAY_SIZE(spl_boot_devices)) - spl_bootdevice_ofpath = spl_boot_devices[boot_device]; + ret = uclass_find_device_by_of_offset(UCLASS_SPI_FLASH, node, &dev); + if (ret) { + debug("%s: could not find udevice for %s\n", __func__, conf); + continue; + }
- if (spl_bootdevice_ofpath) - debug("%s: spl_bootdevice_id %x maps to '%s'\n", - __func__, boot_device, spl_bootdevice_ofpath); - else - debug("%s: failed to resolve spl_bootdevice_id %x\n", - __func__, boot_device); + return ofnode_get_path(dev_ofnode(dev), buf, buflen); + }
- return spl_bootdevice_ofpath; + return -ENODEV; + } + +#if CONFIG_IS_ENABLED(BLK) + dev_num = (boot_device == BOOT_DEVICE_MMC1) ? 0 : 1; + + ret = blk_find_device(UCLASS_MMC, dev_num, &dev); + if (ret) { + debug("%s: could not find blk device for MMC device %d: %d\n", + __func__, dev_num, ret); + return ret; + } + + dev = dev_get_parent(dev); + return ofnode_get_path(dev_ofnode(dev), buf, buflen); +#else + return -ENODEV; +#endif }
void spl_perform_fixups(struct spl_image_info *spl_image) { void *blob = spl_image_fdt_addr(spl_image); - const char *boot_ofpath; - int chosen; + char boot_ofpath[512]; + int chosen, ret;
/* * Inject the ofpath of the device the full U-Boot (or Linux in @@ -196,9 +258,9 @@ void spl_perform_fixups(struct spl_image_info *spl_image) if (!blob) return;
- boot_ofpath = spl_decode_boot_device(spl_image->boot_device); - if (!boot_ofpath) { - pr_err("%s: could not map boot_device to ofpath\n", __func__); + ret = spl_decode_boot_device(spl_image->boot_device, boot_ofpath, sizeof(boot_ofpath)); + if (ret) { + pr_err("%s: could not map boot_device to ofpath: %d\n", __func__, ret); return; }