1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2014
4 * Texas Instruments, <www.ti.com>
5 *
6 * Dan Murphy <dmurphy@ti.com>
7 *
8 * FAT Image Functions copied from spl_mmc.c
9 */
10
11 #include <common.h>
12 #include <spl.h>
13 #include <asm/u-boot.h>
14 #include <fat.h>
15 #include <errno.h>
16 #include <image.h>
17 #include <linux/libfdt.h>
18
19 static int fat_registered;
20
spl_register_fat_device(struct blk_desc * block_dev,int partition)21 static int spl_register_fat_device(struct blk_desc *block_dev, int partition)
22 {
23 int err = 0;
24
25 if (fat_registered)
26 return err;
27
28 err = fat_register_device(block_dev, partition);
29 if (err) {
30 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
31 printf("%s: fat register err - %d\n", __func__, err);
32 #endif
33 return err;
34 }
35
36 fat_registered = 1;
37
38 return err;
39 }
40
spl_fit_read(struct spl_load_info * load,ulong file_offset,ulong size,void * buf)41 static ulong spl_fit_read(struct spl_load_info *load, ulong file_offset,
42 ulong size, void *buf)
43 {
44 loff_t actread;
45 int ret;
46 char *filename = (char *)load->filename;
47
48 ret = fat_read_file(filename, buf, file_offset, size, &actread);
49 if (ret)
50 return ret;
51
52 return actread;
53 }
54
spl_load_image_fat(struct spl_image_info * spl_image,struct blk_desc * block_dev,int partition,const char * filename)55 int spl_load_image_fat(struct spl_image_info *spl_image,
56 struct blk_desc *block_dev, int partition,
57 const char *filename)
58 {
59 int err;
60 struct image_header *header;
61
62 err = spl_register_fat_device(block_dev, partition);
63 if (err)
64 goto end;
65
66 header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
67 sizeof(struct image_header));
68
69 err = file_fat_read(filename, header, sizeof(struct image_header));
70 if (err <= 0)
71 goto end;
72
73 if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
74 image_get_magic(header) == FDT_MAGIC) {
75 struct spl_load_info load;
76
77 debug("Found FIT\n");
78 load.read = spl_fit_read;
79 load.bl_len = 1;
80 load.filename = (void *)filename;
81 load.priv = NULL;
82
83 return spl_load_simple_fit(spl_image, &load, 0, header);
84 } else {
85 err = spl_parse_image_header(spl_image, header);
86 if (err)
87 goto end;
88
89 err = file_fat_read(filename,
90 (u8 *)(uintptr_t)spl_image->load_addr, 0);
91 }
92
93 end:
94 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
95 if (err <= 0)
96 printf("%s: error reading image %s, err - %d\n",
97 __func__, filename, err);
98 #endif
99
100 return (err <= 0);
101 }
102
103 #ifdef CONFIG_SPL_OS_BOOT
spl_load_image_fat_os(struct spl_image_info * spl_image,struct blk_desc * block_dev,int partition)104 int spl_load_image_fat_os(struct spl_image_info *spl_image,
105 struct blk_desc *block_dev, int partition)
106 {
107 int err;
108 __maybe_unused char *file;
109
110 err = spl_register_fat_device(block_dev, partition);
111 if (err)
112 return err;
113
114 #if defined(CONFIG_SPL_ENV_SUPPORT) && defined(CONFIG_SPL_OS_BOOT)
115 file = env_get("falcon_args_file");
116 if (file) {
117 err = file_fat_read(file, (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
118 if (err <= 0) {
119 printf("spl: error reading image %s, err - %d, falling back to default\n",
120 file, err);
121 goto defaults;
122 }
123 file = env_get("falcon_image_file");
124 if (file) {
125 err = spl_load_image_fat(spl_image, block_dev,
126 partition, file);
127 if (err != 0) {
128 puts("spl: falling back to default\n");
129 goto defaults;
130 }
131
132 return 0;
133 } else
134 puts("spl: falcon_image_file not set in environment, falling back to default\n");
135 } else
136 puts("spl: falcon_args_file not set in environment, falling back to default\n");
137
138 defaults:
139 #endif
140
141 err = file_fat_read(CONFIG_SPL_FS_LOAD_ARGS_NAME,
142 (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
143 if (err <= 0) {
144 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
145 printf("%s: error reading image %s, err - %d\n",
146 __func__, CONFIG_SPL_FS_LOAD_ARGS_NAME, err);
147 #endif
148 return -1;
149 }
150
151 return spl_load_image_fat(spl_image, block_dev, partition,
152 CONFIG_SPL_FS_LOAD_KERNEL_NAME);
153 }
154 #else
spl_load_image_fat_os(struct spl_image_info * spl_image,struct blk_desc * block_dev,int partition)155 int spl_load_image_fat_os(struct spl_image_info *spl_image,
156 struct blk_desc *block_dev, int partition)
157 {
158 return -ENOSYS;
159 }
160 #endif
161