| Philipp Tomsich | 5c360af | 2017-07-19 22:04:32 +0200 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0+ |
| 5 | */ |
| 6 | |
| 7 | #include <common.h> |
| 8 | #include <dm.h> |
| 9 | #include <mmc.h> |
| 10 | #include <spl.h> |
| 11 | |
| 12 | #if CONFIG_IS_ENABLED(OF_CONTROL) |
| 13 | static int spl_node_to_boot_device(int node) |
| 14 | { |
| 15 | struct udevice *parent; |
| 16 | |
| 17 | /* |
| 18 | * This should eventually move into the SPL code, once SPL becomes |
| 19 | * aware of the block-device layer. Until then (and to avoid unneeded |
| 20 | * delays in getting this feature out, it lives at the board-level). |
| 21 | */ |
| 22 | if (!uclass_get_device_by_of_offset(UCLASS_MMC, node, &parent)) { |
| 23 | struct udevice *dev; |
| 24 | struct blk_desc *desc = NULL; |
| 25 | |
| 26 | for (device_find_first_child(parent, &dev); |
| 27 | dev; |
| 28 | device_find_next_child(&dev)) { |
| 29 | if (device_get_uclass_id(dev) == UCLASS_BLK) { |
| 30 | desc = dev_get_uclass_platdata(dev); |
| 31 | break; |
| 32 | } |
| 33 | } |
| 34 | |
| 35 | if (!desc) |
| 36 | return -ENOENT; |
| 37 | |
| 38 | switch (desc->devnum) { |
| 39 | case 0: |
| 40 | return BOOT_DEVICE_MMC1; |
| 41 | case 1: |
| 42 | return BOOT_DEVICE_MMC2; |
| 43 | default: |
| 44 | return -ENOSYS; |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | /* |
| 49 | * SPL doesn't differentiate SPI flashes, so we keep the detection |
| 50 | * brief and inaccurate... hopefully, the common SPL layer can be |
| 51 | * extended with awareness of the BLK layer (and matching OF_CONTROL) |
| 52 | * soon. |
| 53 | */ |
| 54 | if (!uclass_get_device_by_of_offset(UCLASS_SPI_FLASH, node, &parent)) |
| 55 | return BOOT_DEVICE_SPI; |
| 56 | |
| 57 | return -1; |
| 58 | } |
| 59 | |
| 60 | void board_boot_order(u32 *spl_boot_list) |
| 61 | { |
| 62 | const void *blob = gd->fdt_blob; |
| 63 | int chosen_node = fdt_path_offset(blob, "/chosen"); |
| 64 | int idx = 0; |
| 65 | int elem; |
| 66 | int boot_device; |
| 67 | int node; |
| 68 | const char *conf; |
| 69 | |
| 70 | if (chosen_node < 0) { |
| 71 | debug("%s: /chosen not found, using spl_boot_device()\n", |
| 72 | __func__); |
| 73 | spl_boot_list[0] = spl_boot_device(); |
| 74 | return; |
| 75 | } |
| 76 | |
| 77 | for (elem = 0; |
| 78 | (conf = fdt_stringlist_get(blob, chosen_node, |
| 79 | "u-boot,spl-boot-order", elem, NULL)); |
| 80 | elem++) { |
| 81 | /* First check if the list element is an alias */ |
| 82 | const char *alias = fdt_get_alias(blob, conf); |
| 83 | if (alias) |
| 84 | conf = alias; |
| 85 | |
| 86 | /* Try to resolve the config item (or alias) as a path */ |
| 87 | node = fdt_path_offset(blob, conf); |
| 88 | if (node < 0) { |
| 89 | debug("%s: could not find %s in FDT", __func__, conf); |
| 90 | continue; |
| 91 | } |
| 92 | |
| 93 | /* Try to map this back onto SPL boot devices */ |
| 94 | boot_device = spl_node_to_boot_device(node); |
| 95 | if (boot_device < 0) { |
| 96 | debug("%s: could not map node @%x to a boot-device\n", |
| 97 | __func__, node); |
| 98 | continue; |
| 99 | } |
| 100 | |
| 101 | spl_boot_list[idx++] = boot_device; |
| 102 | } |
| 103 | |
| 104 | /* If we had no matches, fall back to spl_boot_device */ |
| 105 | if (idx == 0) |
| 106 | spl_boot_list[0] = spl_boot_device(); |
| 107 | } |
| 108 | #endif |