blob: 4f78c72720948e9adc77ae1c3437d096d5c5dca9 [file] [log] [blame]
Philipp Tomsich9b0bc592017-07-19 22:04:32 +02001/*
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)
13static 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
60void 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