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 = spl_get_load_buffer(-sizeof(*header), sizeof(*header));
67
68 err = file_fat_read(filename, header, sizeof(struct image_header));
69 if (err <= 0)
70 goto end;
71
72 if (IS_ENABLED(CONFIG_SPL_LOAD_FIT_FULL) &&
73 image_get_magic(header) == FDT_MAGIC) {
74 err = file_fat_read(filename, (void *)CONFIG_SYS_LOAD_ADDR, 0);
75 if (err <= 0)
76 goto end;
77 err = spl_parse_image_header(spl_image,
78 (struct image_header *)CONFIG_SYS_LOAD_ADDR);
79 if (err == -EAGAIN)
80 return err;
81 if (err == 0)
82 err = 1;
83 } else if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
84 image_get_magic(header) == FDT_MAGIC) {
85 struct spl_load_info load;
86
87 debug("Found FIT\n");
88 load.read = spl_fit_read;
89 load.bl_len = 1;
90 load.filename = (void *)filename;
91 load.priv = NULL;
92
93 return spl_load_simple_fit(spl_image, &load, 0, header);
94 } else {
95 err = spl_parse_image_header(spl_image, header);
96 if (err)
97 goto end;
98
99 err = file_fat_read(filename,
100 (u8 *)(uintptr_t)spl_image->load_addr, 0);
101 }
102
103 end:
104 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
105 if (err <= 0)
106 printf("%s: error reading image %s, err - %d\n",
107 __func__, filename, err);
108 #endif
109
110 return (err <= 0);
111 }
112
113 #ifdef CONFIG_SPL_OS_BOOT
spl_load_image_fat_os(struct spl_image_info * spl_image,struct blk_desc * block_dev,int partition)114 int spl_load_image_fat_os(struct spl_image_info *spl_image,
115 struct blk_desc *block_dev, int partition)
116 {
117 int err;
118 __maybe_unused char *file;
119
120 err = spl_register_fat_device(block_dev, partition);
121 if (err)
122 return err;
123
124 #if defined(CONFIG_SPL_ENV_SUPPORT) && defined(CONFIG_SPL_OS_BOOT)
125 file = env_get("falcon_args_file");
126 if (file) {
127 err = file_fat_read(file, (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
128 if (err <= 0) {
129 printf("spl: error reading image %s, err - %d, falling back to default\n",
130 file, err);
131 goto defaults;
132 }
133 file = env_get("falcon_image_file");
134 if (file) {
135 err = spl_load_image_fat(spl_image, block_dev,
136 partition, file);
137 if (err != 0) {
138 puts("spl: falling back to default\n");
139 goto defaults;
140 }
141
142 return 0;
143 } else
144 puts("spl: falcon_image_file not set in environment, falling back to default\n");
145 } else
146 puts("spl: falcon_args_file not set in environment, falling back to default\n");
147
148 defaults:
149 #endif
150
151 err = file_fat_read(CONFIG_SPL_FS_LOAD_ARGS_NAME,
152 (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
153 if (err <= 0) {
154 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
155 printf("%s: error reading image %s, err - %d\n",
156 __func__, CONFIG_SPL_FS_LOAD_ARGS_NAME, err);
157 #endif
158 return -1;
159 }
160
161 return spl_load_image_fat(spl_image, block_dev, partition,
162 CONFIG_SPL_FS_LOAD_KERNEL_NAME);
163 }
164 #else
spl_load_image_fat_os(struct spl_image_info * spl_image,struct blk_desc * block_dev,int partition)165 int spl_load_image_fat_os(struct spl_image_info *spl_image,
166 struct blk_desc *block_dev, int partition)
167 {
168 return -ENOSYS;
169 }
170 #endif
171