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83d290c5 1// SPDX-License-Identifier: GPL-2.0+
57210c7c
MS
2/*
3 * (c) Copyright 2011 by Tigris Elektronik GmbH
4 *
5 * Author:
6 * Maximilian Schwerin <[email protected]>
57210c7c
MS
7 */
8
9#include <common.h>
57210c7c 10#include <command.h>
0ac7d722 11#include <env.h>
f3998fdc 12#include <env_internal.h>
e6f6f9e6 13#include <part.h>
57210c7c 14#include <malloc.h>
cf92e05c 15#include <memalign.h>
57210c7c
MS
16#include <search.h>
17#include <errno.h>
18#include <fat.h>
19#include <mmc.h>
54ee5ae8 20#include <scsi.h>
e6f6f9e6 21#include <asm/cache.h>
2339f01a 22#include <asm/global_data.h>
e6f6f9e6 23#include <linux/stddef.h>
57210c7c 24
4415f1d1
SG
25#ifdef CONFIG_SPL_BUILD
26/* TODO([email protected]): Figure out why this is needed */
27# if !defined(CONFIG_TARGET_AM335X_EVM) || defined(CONFIG_SPL_OS_BOOT)
28# define LOADENV
29# endif
30#else
31# define LOADENV
4415f1d1
SG
32#endif
33
2339f01a
BM
34DECLARE_GLOBAL_DATA_PTR;
35
eb68ead2
HY
36__weak const char *env_fat_get_intf(void)
37{
38 return (const char *)CONFIG_ENV_FAT_INTERFACE;
39}
40
41__weak char *env_fat_get_dev_part(void)
6731bef6
DW
42{
43#ifdef CONFIG_MMC
44 static char *part_str;
45
46 if (!part_str) {
47 part_str = CONFIG_ENV_FAT_DEVICE_AND_PART;
48 if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "mmc") && part_str[0] == ':') {
49 part_str = "0" CONFIG_ENV_FAT_DEVICE_AND_PART;
50 part_str[0] += mmc_get_env_dev();
51 }
52 }
53
54 return part_str;
55#else
56 return CONFIG_ENV_FAT_DEVICE_AND_PART;
57#endif
58}
59
e5bce247 60static int env_fat_save(void)
57210c7c 61{
cda87ec5 62 env_t __aligned(ARCH_DMA_MINALIGN) env_new;
4101f687 63 struct blk_desc *dev_desc = NULL;
0528979f 64 struct disk_partition info;
2339f01a 65 const char *file = CONFIG_ENV_FAT_FILE;
be354c1a 66 int dev, part;
9aa90c1d 67 int err;
1ad0b98a 68 loff_t size;
eb68ead2
HY
69 const char *ifname = env_fat_get_intf();
70 const char *dev_and_part = env_fat_get_dev_part();
57210c7c 71
7ce1526e
MV
72 err = env_export(&env_new);
73 if (err)
74 return err;
57210c7c 75
eb68ead2
HY
76 part = blk_get_device_part_str(ifname, dev_and_part,
77 &dev_desc, &info, 1);
be354c1a 78 if (part < 0)
57210c7c 79 return 1;
9aa90c1d 80
bcce53d0 81 dev = dev_desc->devnum;
be354c1a 82 if (fat_set_blk_dev(dev_desc, &info) != 0) {
d0816da5
MR
83 /*
84 * This printf is embedded in the messages from env_save that
85 * will calling it. The missing \n is intentional.
86 */
eb68ead2 87 printf("Unable to use %s %d:%d...\n", ifname, dev, part);
57210c7c
MS
88 return 1;
89 }
90
2339f01a
BM
91#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
92 if (gd->env_valid == ENV_VALID)
93 file = CONFIG_ENV_FAT_FILE_REDUND;
94#endif
95
96 err = file_fat_write(file, (void *)&env_new, 0, sizeof(env_t), &size);
9aa90c1d 97 if (err == -1) {
d0816da5
MR
98 /*
99 * This printf is embedded in the messages from env_save that
100 * will calling it. The missing \n is intentional.
101 */
eb68ead2 102 printf("Unable to write \"%s\" from %s%d:%d...\n", file, ifname, dev, part);
57210c7c
MS
103 return 1;
104 }
105
2339f01a
BM
106#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
107 gd->env_valid = (gd->env_valid == ENV_REDUND) ? ENV_VALID : ENV_REDUND;
108#endif
109
57210c7c
MS
110 return 0;
111}
57210c7c 112
4415f1d1 113#ifdef LOADENV
c5951991 114static int env_fat_load(void)
57210c7c 115{
2339f01a
BM
116 ALLOC_CACHE_ALIGN_BUFFER(char, buf1, CONFIG_ENV_SIZE);
117#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
118 ALLOC_CACHE_ALIGN_BUFFER(char, buf2, CONFIG_ENV_SIZE);
119 int err2;
120#endif
4101f687 121 struct blk_desc *dev_desc = NULL;
0528979f 122 struct disk_partition info;
be354c1a 123 int dev, part;
2339f01a 124 int err1;
eb68ead2
HY
125 const char *ifname = env_fat_get_intf();
126 const char *dev_and_part = env_fat_get_dev_part();
57210c7c 127
95058fbb 128#ifdef CONFIG_MMC
eb68ead2 129 if (!strcmp(ifname, "mmc"))
26862b4a 130 mmc_initialize(NULL);
95058fbb 131#endif
54ee5ae8
RS
132#ifndef CONFIG_SPL_BUILD
133#if defined(CONFIG_AHCI) || defined(CONFIG_SCSI)
134 if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "scsi"))
135 scsi_scan(true);
136#endif
137#endif
eb68ead2
HY
138 part = blk_get_device_part_str(ifname, dev_and_part,
139 &dev_desc, &info, 1);
be354c1a
WJ
140 if (part < 0)
141 goto err_env_relocate;
142
bcce53d0 143 dev = dev_desc->devnum;
be354c1a 144 if (fat_set_blk_dev(dev_desc, &info) != 0) {
d0816da5
MR
145 /*
146 * This printf is embedded in the messages from env_save that
147 * will calling it. The missing \n is intentional.
148 */
eb68ead2 149 printf("Unable to use %s %d:%d...\n", ifname, dev, part);
be354c1a 150 goto err_env_relocate;
57210c7c
MS
151 }
152
2339f01a
BM
153 err1 = file_fat_read(CONFIG_ENV_FAT_FILE, buf1, CONFIG_ENV_SIZE);
154#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
155 err2 = file_fat_read(CONFIG_ENV_FAT_FILE_REDUND, buf2, CONFIG_ENV_SIZE);
156
157 err1 = (err1 >= 0) ? 0 : -1;
158 err2 = (err2 >= 0) ? 0 : -1;
159 return env_import_redund(buf1, err1, buf2, err2, H_EXTERNAL);
160#else
161 if (err1 < 0) {
d0816da5
MR
162 /*
163 * This printf is embedded in the messages from env_save that
164 * will calling it. The missing \n is intentional.
165 */
f6f27be1 166 printf("Unable to read \"%s\" from %s%d:%d... \n",
eb68ead2 167 CONFIG_ENV_FAT_FILE, ifname, dev, part);
be354c1a 168 goto err_env_relocate;
57210c7c
MS
169 }
170
2339f01a
BM
171 return env_import(buf1, 1, H_EXTERNAL);
172#endif
be354c1a
WJ
173
174err_env_relocate:
0ac7d722 175 env_set_default(NULL, 0);
c5951991
SG
176
177 return -EIO;
57210c7c 178}
4415f1d1
SG
179#endif /* LOADENV */
180
181U_BOOT_ENV_LOCATION(fat) = {
182 .location = ENVL_FAT,
ac358beb 183 ENV_NAME("FAT")
4415f1d1 184#ifdef LOADENV
e5bce247 185 .load = env_fat_load,
4415f1d1 186#endif
3908bc93 187 .save = ENV_SAVE_PTR(env_fat_save),
4415f1d1 188};
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