rockchip: spl: make spl-boot-order code reusable (split from rk3399)
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>
diff --git a/arch/arm/mach-rockchip/spl-boot-order.c b/arch/arm/mach-rockchip/spl-boot-order.c
new file mode 100644
index 0000000..4f78c72
--- /dev/null
+++ b/arch/arm/mach-rockchip/spl-boot-order.c
@@ -0,0 +1,108 @@
+/*
+ * (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <mmc.h>
+#include <spl.h>
+
+#if CONFIG_IS_ENABLED(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