Merge branch 'master' of git://git.denx.de/u-boot-fsl-qoriq
[oweals/u-boot.git] / common / spl / spl_fat.c
1 /*
2  * (C) Copyright 2014
3  * Texas Instruments, <www.ti.com>
4  *
5  * Dan Murphy <dmurphy@ti.com>
6  *
7  * SPDX-License-Identifier:     GPL-2.0+
8  *
9  * FAT Image Functions copied from spl_mmc.c
10  */
11
12 #include <common.h>
13 #include <spl.h>
14 #include <asm/u-boot.h>
15 #include <fat.h>
16 #include <errno.h>
17 #include <image.h>
18
19 static int fat_registered;
20
21 #ifdef CONFIG_SPL_FAT_SUPPORT
22 static int spl_register_fat_device(block_dev_desc_t *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
42 int spl_load_image_fat(block_dev_desc_t *block_dev,
43                                                 int partition,
44                                                 const char *filename)
45 {
46         int err;
47         struct image_header *header;
48
49         err = spl_register_fat_device(block_dev, partition);
50         if (err)
51                 goto end;
52
53         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
54                                                 sizeof(struct image_header));
55
56         err = file_fat_read(filename, header, sizeof(struct image_header));
57         if (err <= 0)
58                 goto end;
59
60         spl_parse_image_header(header);
61
62         err = file_fat_read(filename, (u8 *)spl_image.load_addr, 0);
63
64 end:
65 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
66         if (err <= 0)
67                 printf("%s: error reading image %s, err - %d\n",
68                        __func__, filename, err);
69 #endif
70
71         return (err <= 0);
72 }
73
74 #ifdef CONFIG_SPL_OS_BOOT
75 int spl_load_image_fat_os(block_dev_desc_t *block_dev, int partition)
76 {
77         int err;
78         __maybe_unused char *file;
79
80         err = spl_register_fat_device(block_dev, partition);
81         if (err)
82                 return err;
83
84 #if defined(CONFIG_SPL_ENV_SUPPORT) && defined(CONFIG_SPL_OS_BOOT)
85         file = getenv("falcon_args_file");
86         if (file) {
87                 err = file_fat_read(file, (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
88                 if (err <= 0) {
89                         printf("spl: error reading image %s, err - %d, falling back to default\n",
90                                file, err);
91                         goto defaults;
92                 }
93                 file = getenv("falcon_image_file");
94                 if (file) {
95                         err = spl_load_image_fat(block_dev, partition, file);
96                         if (err != 0) {
97                                 puts("spl: falling back to default\n");
98                                 goto defaults;
99                         }
100
101                         return 0;
102                 } else
103                         puts("spl: falcon_image_file not set in environment, falling back to default\n");
104         } else
105                 puts("spl: falcon_args_file not set in environment, falling back to default\n");
106
107 defaults:
108 #endif
109
110         err = file_fat_read(CONFIG_SPL_FS_LOAD_ARGS_NAME,
111                             (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
112         if (err <= 0) {
113 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
114                 printf("%s: error reading image %s, err - %d\n",
115                        __func__, CONFIG_SPL_FS_LOAD_ARGS_NAME, err);
116 #endif
117                 return -1;
118         }
119
120         return spl_load_image_fat(block_dev, partition,
121                         CONFIG_SPL_FS_LOAD_KERNEL_NAME);
122 }
123 #else
124 int spl_load_image_fat_os(block_dev_desc_t *block_dev, int partition)
125 {
126         return -ENOSYS;
127 }
128 #endif
129 #endif