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 <log.h>
14 #include <spl.h>
15 #include <asm/u-boot.h>
16 #include <fat.h>
17 #include <errno.h>
18 #include <image.h>
19 #include <linux/libfdt.h>
20
21 static int fat_registered;
22
spl_register_fat_device(struct blk_desc * block_dev,int partition)23 static int spl_register_fat_device(struct blk_desc *block_dev, int partition)
24 {
25 int err = 0;
26
27 if (fat_registered)
28 return err;
29
30 err = fat_register_device(block_dev, partition);
31 if (err) {
32 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
33 printf("%s: fat register err - %d\n", __func__, err);
34 #endif
35 return err;
36 }
37
38 fat_registered = 1;
39
40 return err;
41 }
42
spl_fit_read(struct spl_load_info * load,ulong file_offset,ulong size,void * buf)43 static ulong spl_fit_read(struct spl_load_info *load, ulong file_offset,
44 ulong size, void *buf)
45 {
46 loff_t actread;
47 int ret;
48 char *filename = (char *)load->filename;
49
50 ret = fat_read_file(filename, buf, file_offset, size, &actread);
51 if (ret)
52 return ret;
53
54 return actread;
55 }
56
spl_load_image_fat(struct spl_image_info * spl_image,struct spl_boot_device * bootdev,struct blk_desc * block_dev,int partition,const char * filename)57 int spl_load_image_fat(struct spl_image_info *spl_image,
58 struct spl_boot_device *bootdev,
59 struct blk_desc *block_dev, int partition,
60 const char *filename)
61 {
62 int err;
63 struct legacy_img_hdr *header;
64
65 err = spl_register_fat_device(block_dev, partition);
66 if (err)
67 goto end;
68
69 header = spl_get_load_buffer(-sizeof(*header), sizeof(*header));
70
71 err = file_fat_read(filename, header, sizeof(struct legacy_img_hdr));
72 if (err <= 0)
73 goto end;
74
75 if (IS_ENABLED(CONFIG_SPL_LOAD_FIT_FULL) &&
76 image_get_magic(header) == FDT_MAGIC) {
77 err = file_fat_read(filename, (void *)CONFIG_SYS_LOAD_ADDR, 0);
78 if (err <= 0)
79 goto end;
80 err = spl_parse_image_header(spl_image, bootdev,
81 (struct legacy_img_hdr *)CONFIG_SYS_LOAD_ADDR);
82 if (err == -EAGAIN)
83 return err;
84 if (err == 0)
85 err = 1;
86 } else if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
87 image_get_magic(header) == FDT_MAGIC) {
88 struct spl_load_info load;
89
90 debug("Found FIT\n");
91 load.read = spl_fit_read;
92 load.bl_len = 1;
93 load.filename = (void *)filename;
94 load.priv = NULL;
95
96 return spl_load_simple_fit(spl_image, &load, 0, header);
97 } else {
98 err = spl_parse_image_header(spl_image, bootdev, header);
99 if (err)
100 goto end;
101
102 err = file_fat_read(filename,
103 (u8 *)(uintptr_t)spl_image->load_addr, 0);
104 }
105
106 end:
107 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
108 if (err <= 0)
109 printf("%s: error reading image %s, err - %d\n",
110 __func__, filename, err);
111 #endif
112
113 return (err <= 0);
114 }
115
116 #if CONFIG_IS_ENABLED(OS_BOOT)
spl_load_image_fat_os(struct spl_image_info * spl_image,struct spl_boot_device * bootdev,struct blk_desc * block_dev,int partition)117 int spl_load_image_fat_os(struct spl_image_info *spl_image,
118 struct spl_boot_device *bootdev,
119 struct blk_desc *block_dev, int partition)
120 {
121 int err;
122 __maybe_unused char *file;
123
124 err = spl_register_fat_device(block_dev, partition);
125 if (err)
126 return err;
127
128 #if defined(CONFIG_SPL_ENV_SUPPORT) && defined(CONFIG_SPL_OS_BOOT)
129 file = env_get("falcon_args_file");
130 if (file) {
131 err = file_fat_read(file, (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
132 if (err <= 0) {
133 printf("spl: error reading image %s, err - %d, falling back to default\n",
134 file, err);
135 goto defaults;
136 }
137 file = env_get("falcon_image_file");
138 if (file) {
139 err = spl_load_image_fat(spl_image, bootdev, block_dev,
140 partition, file);
141 if (err != 0) {
142 puts("spl: falling back to default\n");
143 goto defaults;
144 }
145
146 return 0;
147 } else
148 puts("spl: falcon_image_file not set in environment, falling back to default\n");
149 } else
150 puts("spl: falcon_args_file not set in environment, falling back to default\n");
151
152 defaults:
153 #endif
154
155 err = file_fat_read(CONFIG_SPL_FS_LOAD_ARGS_NAME,
156 (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
157 if (err <= 0) {
158 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
159 printf("%s: error reading image %s, err - %d\n",
160 __func__, CONFIG_SPL_FS_LOAD_ARGS_NAME, err);
161 #endif
162 return -1;
163 }
164
165 return spl_load_image_fat(spl_image, bootdev, block_dev, partition,
166 CONFIG_SPL_FS_LOAD_KERNEL_NAME);
167 }
168 #else
spl_load_image_fat_os(struct spl_image_info * spl_image,struct spl_boot_device * bootdev,struct blk_desc * block_dev,int partition)169 int spl_load_image_fat_os(struct spl_image_info *spl_image,
170 struct spl_boot_device *bootdev,
171 struct blk_desc *block_dev, int partition)
172 {
173 return -ENOSYS;
174 }
175 #endif
176