In order to reuse the support for the u-boot,spl-boot-order property from the rk3399, we split it into a reusable module that can be included by the SPL code for any of our boards. Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> Reviewed-by: Simon Glass <sjg@chromium.org>master
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/*
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* (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#include <common.h> |
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#include <dm.h> |
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#include <mmc.h> |
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#include <spl.h> |
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#if CONFIG_IS_ENABLED(OF_CONTROL) |
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static int spl_node_to_boot_device(int node) |
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{ |
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struct udevice *parent; |
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/*
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* This should eventually move into the SPL code, once SPL becomes |
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* aware of the block-device layer. Until then (and to avoid unneeded |
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* delays in getting this feature out, it lives at the board-level). |
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*/ |
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if (!uclass_get_device_by_of_offset(UCLASS_MMC, node, &parent)) { |
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struct udevice *dev; |
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struct blk_desc *desc = NULL; |
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for (device_find_first_child(parent, &dev); |
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dev; |
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device_find_next_child(&dev)) { |
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if (device_get_uclass_id(dev) == UCLASS_BLK) { |
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desc = dev_get_uclass_platdata(dev); |
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break; |
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} |
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} |
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if (!desc) |
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return -ENOENT; |
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switch (desc->devnum) { |
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case 0: |
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return BOOT_DEVICE_MMC1; |
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case 1: |
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return BOOT_DEVICE_MMC2; |
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default: |
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return -ENOSYS; |
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} |
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} |
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/*
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* SPL doesn't differentiate SPI flashes, so we keep the detection |
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* brief and inaccurate... hopefully, the common SPL layer can be |
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* extended with awareness of the BLK layer (and matching OF_CONTROL) |
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* soon. |
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*/ |
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if (!uclass_get_device_by_of_offset(UCLASS_SPI_FLASH, node, &parent)) |
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return BOOT_DEVICE_SPI; |
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return -1; |
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} |
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void board_boot_order(u32 *spl_boot_list) |
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{ |
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const void *blob = gd->fdt_blob; |
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int chosen_node = fdt_path_offset(blob, "/chosen"); |
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int idx = 0; |
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int elem; |
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int boot_device; |
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int node; |
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const char *conf; |
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if (chosen_node < 0) { |
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debug("%s: /chosen not found, using spl_boot_device()\n", |
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__func__); |
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spl_boot_list[0] = spl_boot_device(); |
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return; |
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} |
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for (elem = 0; |
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(conf = fdt_stringlist_get(blob, chosen_node, |
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"u-boot,spl-boot-order", elem, NULL)); |
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elem++) { |
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/* First check if the list element is an alias */ |
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const char *alias = fdt_get_alias(blob, conf); |
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if (alias) |
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conf = alias; |
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/* Try to resolve the config item (or alias) as a path */ |
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node = fdt_path_offset(blob, conf); |
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if (node < 0) { |
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debug("%s: could not find %s in FDT", __func__, conf); |
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continue; |
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} |
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/* Try to map this back onto SPL boot devices */ |
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boot_device = spl_node_to_boot_device(node); |
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if (boot_device < 0) { |
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debug("%s: could not map node @%x to a boot-device\n", |
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__func__, node); |
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continue; |
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} |
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spl_boot_list[idx++] = boot_device; |
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} |
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/* If we had no matches, fall back to spl_boot_device */ |
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if (idx == 0) |
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spl_boot_list[0] = spl_boot_device(); |
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} |
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#endif |
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