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 <env.h>
13 #include <spl.h>
14 #include <asm/u-boot.h>
15 #include <fat.h>
16 #include <errno.h>
17 #include <image.h>
18 #include <linux/libfdt.h>
19
20 static int fat_registered;
21
spl_register_fat_device(struct blk_desc * block_dev,int partition)22 static int spl_register_fat_device(struct blk_desc *block_dev, int partition)
23 {
24 int err = 0;
25
26 if (fat_registered)
27 return err;
28
29 err = fat_register_device(block_dev, partition);
30 if (err) {
31 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
32 printf("%s: fat register err - %d\n", __func__, err);
33 #endif
34 return err;
35 }
36
37 fat_registered = 1;
38
39 return err;
40 }
41
spl_fit_read(struct spl_load_info * load,ulong file_offset,ulong size,void * buf)42 static ulong spl_fit_read(struct spl_load_info *load, ulong file_offset,
43 ulong size, void *buf)
44 {
45 loff_t actread;
46 int ret;
47 char *filename = (char *)load->filename;
48
49 ret = fat_read_file(filename, buf, file_offset, size, &actread);
50 if (ret)
51 return ret;
52
53 return actread;
54 }
55
spl_load_image_fat(struct spl_image_info * spl_image,struct blk_desc * block_dev,int partition,const char * filename)56 int spl_load_image_fat(struct spl_image_info *spl_image,
57 struct blk_desc *block_dev, int partition,
58 const char *filename)
59 {
60 int err;
61 struct image_header *header;
62
63 err = spl_register_fat_device(block_dev, partition);
64 if (err)
65 goto end;
66
67 header = spl_get_load_buffer(-sizeof(*header), sizeof(*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_FULL) &&
74 image_get_magic(header) == FDT_MAGIC) {
75 err = file_fat_read(filename, (void *)CONFIG_SYS_LOAD_ADDR, 0);
76 if (err <= 0)
77 goto end;
78 err = spl_parse_image_header(spl_image,
79 (struct image_header *)CONFIG_SYS_LOAD_ADDR);
80 if (err == -EAGAIN)
81 return err;
82 if (err == 0)
83 err = 1;
84 } else if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
85 image_get_magic(header) == FDT_MAGIC) {
86 struct spl_load_info load;
87
88 debug("Found FIT\n");
89 load.read = spl_fit_read;
90 load.bl_len = 1;
91 load.filename = (void *)filename;
92 load.priv = NULL;
93
94 return spl_load_simple_fit(spl_image, &load, 0, header);
95 } else {
96 err = spl_parse_image_header(spl_image, header);
97 if (err)
98 goto end;
99
100 err = file_fat_read(filename,
101 (u8 *)(uintptr_t)spl_image->load_addr, 0);
102 }
103
104 end:
105 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
106 if (err <= 0)
107 printf("%s: error reading image %s, err - %d\n",
108 __func__, filename, err);
109 #endif
110
111 return (err <= 0);
112 }
113
114 #ifdef CONFIG_SPL_OS_BOOT
spl_load_image_fat_os(struct spl_image_info * spl_image,struct blk_desc * block_dev,int partition)115 int spl_load_image_fat_os(struct spl_image_info *spl_image,
116 struct blk_desc *block_dev, int partition)
117 {
118 int err;
119 __maybe_unused char *file;
120
121 err = spl_register_fat_device(block_dev, partition);
122 if (err)
123 return err;
124
125 #if defined(CONFIG_SPL_ENV_SUPPORT) && defined(CONFIG_SPL_OS_BOOT)
126 file = env_get("falcon_args_file");
127 if (file) {
128 err = file_fat_read(file, (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
129 if (err <= 0) {
130 printf("spl: error reading image %s, err - %d, falling back to default\n",
131 file, err);
132 goto defaults;
133 }
134 file = env_get("falcon_image_file");
135 if (file) {
136 err = spl_load_image_fat(spl_image, block_dev,
137 partition, file);
138 if (err != 0) {
139 puts("spl: falling back to default\n");
140 goto defaults;
141 }
142
143 return 0;
144 } else
145 puts("spl: falcon_image_file not set in environment, falling back to default\n");
146 } else
147 puts("spl: falcon_args_file not set in environment, falling back to default\n");
148
149 defaults:
150 #endif
151
152 err = file_fat_read(CONFIG_SPL_FS_LOAD_ARGS_NAME,
153 (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
154 if (err <= 0) {
155 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
156 printf("%s: error reading image %s, err - %d\n",
157 __func__, CONFIG_SPL_FS_LOAD_ARGS_NAME, err);
158 #endif
159 return -1;
160 }
161
162 return spl_load_image_fat(spl_image, block_dev, partition,
163 CONFIG_SPL_FS_LOAD_KERNEL_NAME);
164 }
165 #else
spl_load_image_fat_os(struct spl_image_info * spl_image,struct blk_desc * block_dev,int partition)166 int spl_load_image_fat_os(struct spl_image_info *spl_image,
167 struct blk_desc *block_dev, int partition)
168 {
169 return -ENOSYS;
170 }
171 #endif
172