diff options
| -rw-r--r-- | arch/arm/mach-rockchip/rk3399-board-spl.c | 99 | ||||
| -rw-r--r-- | doc/device-tree-bindings/chosen.txt | 22 |
2 files changed, 121 insertions, 0 deletions
diff --git a/arch/arm/mach-rockchip/rk3399-board-spl.c b/arch/arm/mach-rockchip/rk3399-board-spl.c index 08aa0cb..4f84ec1 100644 --- a/arch/arm/mach-rockchip/rk3399-board-spl.c +++ b/arch/arm/mach-rockchip/rk3399-board-spl.c @@ -10,6 +10,7 @@ #include <fdtdec.h> #include <led.h> #include <malloc.h> +#include <mmc.h> #include <ram.h> #include <spl.h> #include <asm/gpio.h> @@ -27,6 +28,104 @@ DECLARE_GLOBAL_DATA_PTR; +#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_OF_CONTROL) +static int spl_node_to_boot_device(int node) +{ + struct udevice *parent; + + /* + * This should eventually move into the SPL code, once SPL becomes + * aware of the block-device layer. Until then (and to avoid unneeded + * delays in getting this feature out, it lives at the board-level). + */ + if (!uclass_get_device_by_of_offset(UCLASS_MMC, node, &parent)) { + struct udevice *dev; + struct blk_desc *desc = NULL; + + for (device_find_first_child(parent, &dev); + dev; + device_find_next_child(&dev)) { + if (device_get_uclass_id(dev) == UCLASS_BLK) { + desc = dev_get_uclass_platdata(dev); + break; + } + } + + if (!desc) + return -ENOENT; + + switch (desc->devnum) { + case 0: + return BOOT_DEVICE_MMC1; + case 1: + return BOOT_DEVICE_MMC2; + default: + return -ENOSYS; + } + } + + /* + * SPL doesn't differentiate SPI flashes, so we keep the detection + * brief and inaccurate... hopefully, the common SPL layer can be + * extended with awareness of the BLK layer (and matching OF_CONTROL) + * soon. + */ + if (!uclass_get_device_by_of_offset(UCLASS_SPI_FLASH, node, &parent)) + return BOOT_DEVICE_SPI; + + return -1; +} + +void board_boot_order(u32 *spl_boot_list) +{ + const void *blob = gd->fdt_blob; + int chosen_node = fdt_path_offset(blob, "/chosen"); + int idx = 0; + int elem; + int boot_device; + int node; + const char *conf; + + if (chosen_node < 0) { + debug("%s: /chosen not found, using spl_boot_device()\n", + __func__); + spl_boot_list[0] = spl_boot_device(); + return; + } + + for (elem = 0; + (conf = fdt_stringlist_get(blob, chosen_node, + "u-boot,spl-boot-order", elem, NULL)); + elem++) { + /* First check if the list element is an alias */ + const char *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", __func__, conf); + continue; + } + + /* Try to map this back onto SPL boot devices */ + boot_device = spl_node_to_boot_device(node); + if (boot_device < 0) { + debug("%s: could not map node @%x to a boot-device\n", + __func__, node); + continue; + } + + spl_boot_list[idx++] = boot_device; + } + + /* If we had no matches, fall back to spl_boot_device */ + if (idx == 0) + spl_boot_list[0] = spl_boot_device(); +} +#endif + u32 spl_boot_device(void) { return BOOT_DEVICE_MMC1; diff --git a/doc/device-tree-bindings/chosen.txt b/doc/device-tree-bindings/chosen.txt index bf9a30a..5625d21 100644 --- a/doc/device-tree-bindings/chosen.txt +++ b/doc/device-tree-bindings/chosen.txt @@ -41,3 +41,25 @@ Example reg = <0xf00 0x10>; }; }; + +u-boot,spl-boot-order property +------------------------------ + +In a system using an SPL stage and having multiple boot sources +(e.g. SPI NOR flash, on-board eMMC and a removable SD-card), the boot +device may be probed by reading the image and verifying an image +signature. + +If the SPL is configured through the device-tree, the boot-order can +be configured with the spl-boot-order property under the /chosen node. +Each list element of the property should specify a device to be probed +in the order they are listed: references (i.e. implicit paths), a full +path or an alias is expected for each entry. + +Example +------- +/ { + chosen { + u-boot,spl-boot-order = &sdmmc, "/sdhci@fe330000"; + }; +}; |