1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * (c) Copyright 2011 by Tigris Elektronik GmbH
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Author:
5*4882a593Smuzhiyun * Maximilian Schwerin <mvs@tigris.de>
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <common.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <command.h>
13*4882a593Smuzhiyun #include <environment.h>
14*4882a593Smuzhiyun #include <linux/stddef.h>
15*4882a593Smuzhiyun #include <malloc.h>
16*4882a593Smuzhiyun #include <memalign.h>
17*4882a593Smuzhiyun #include <search.h>
18*4882a593Smuzhiyun #include <errno.h>
19*4882a593Smuzhiyun #include <fat.h>
20*4882a593Smuzhiyun #include <mmc.h>
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #ifdef CONFIG_SPL_BUILD
23*4882a593Smuzhiyun /* TODO(sjg@chromium.org): Figure out why this is needed */
24*4882a593Smuzhiyun # if !defined(CONFIG_TARGET_AM335X_EVM) || defined(CONFIG_SPL_OS_BOOT)
25*4882a593Smuzhiyun # define LOADENV
26*4882a593Smuzhiyun # endif
27*4882a593Smuzhiyun #else
28*4882a593Smuzhiyun # define LOADENV
29*4882a593Smuzhiyun # if defined(CONFIG_CMD_SAVEENV)
30*4882a593Smuzhiyun # define CMD_SAVEENV
31*4882a593Smuzhiyun # endif
32*4882a593Smuzhiyun #endif
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun DECLARE_GLOBAL_DATA_PTR;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun #ifdef CMD_SAVEENV
env_fat_save(void)37*4882a593Smuzhiyun static int env_fat_save(void)
38*4882a593Smuzhiyun {
39*4882a593Smuzhiyun env_t env_new;
40*4882a593Smuzhiyun struct blk_desc *dev_desc = NULL;
41*4882a593Smuzhiyun disk_partition_t info;
42*4882a593Smuzhiyun int dev, part;
43*4882a593Smuzhiyun int err;
44*4882a593Smuzhiyun loff_t size;
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun err = env_export(&env_new);
47*4882a593Smuzhiyun if (err)
48*4882a593Smuzhiyun return err;
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
51*4882a593Smuzhiyun CONFIG_ENV_FAT_DEVICE_AND_PART,
52*4882a593Smuzhiyun &dev_desc, &info, 1);
53*4882a593Smuzhiyun if (part < 0)
54*4882a593Smuzhiyun return 1;
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun dev = dev_desc->devnum;
57*4882a593Smuzhiyun if (fat_set_blk_dev(dev_desc, &info) != 0) {
58*4882a593Smuzhiyun printf("\n** Unable to use %s %d:%d for saveenv **\n",
59*4882a593Smuzhiyun CONFIG_ENV_FAT_INTERFACE, dev, part);
60*4882a593Smuzhiyun return 1;
61*4882a593Smuzhiyun }
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun err = file_fat_write(CONFIG_ENV_FAT_FILE, (void *)&env_new, 0, sizeof(env_t),
64*4882a593Smuzhiyun &size);
65*4882a593Smuzhiyun if (err == -1) {
66*4882a593Smuzhiyun printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
67*4882a593Smuzhiyun CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part);
68*4882a593Smuzhiyun return 1;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun puts("done\n");
72*4882a593Smuzhiyun return 0;
73*4882a593Smuzhiyun }
74*4882a593Smuzhiyun #endif /* CMD_SAVEENV */
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun #ifdef LOADENV
env_fat_load(void)77*4882a593Smuzhiyun static int env_fat_load(void)
78*4882a593Smuzhiyun {
79*4882a593Smuzhiyun ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
80*4882a593Smuzhiyun struct blk_desc *dev_desc = NULL;
81*4882a593Smuzhiyun disk_partition_t info;
82*4882a593Smuzhiyun int dev, part;
83*4882a593Smuzhiyun int err;
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
86*4882a593Smuzhiyun CONFIG_ENV_FAT_DEVICE_AND_PART,
87*4882a593Smuzhiyun &dev_desc, &info, 1);
88*4882a593Smuzhiyun if (part < 0)
89*4882a593Smuzhiyun goto err_env_relocate;
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun dev = dev_desc->devnum;
92*4882a593Smuzhiyun if (fat_set_blk_dev(dev_desc, &info) != 0) {
93*4882a593Smuzhiyun printf("\n** Unable to use %s %d:%d for loading the env **\n",
94*4882a593Smuzhiyun CONFIG_ENV_FAT_INTERFACE, dev, part);
95*4882a593Smuzhiyun goto err_env_relocate;
96*4882a593Smuzhiyun }
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun err = file_fat_read(CONFIG_ENV_FAT_FILE, buf, CONFIG_ENV_SIZE);
99*4882a593Smuzhiyun if (err == -1) {
100*4882a593Smuzhiyun printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
101*4882a593Smuzhiyun CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part);
102*4882a593Smuzhiyun goto err_env_relocate;
103*4882a593Smuzhiyun }
104*4882a593Smuzhiyun
105*4882a593Smuzhiyun env_import(buf, 1);
106*4882a593Smuzhiyun return 0;
107*4882a593Smuzhiyun
108*4882a593Smuzhiyun err_env_relocate:
109*4882a593Smuzhiyun set_default_env(NULL);
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun return -EIO;
112*4882a593Smuzhiyun }
113*4882a593Smuzhiyun #endif /* LOADENV */
114*4882a593Smuzhiyun
115*4882a593Smuzhiyun U_BOOT_ENV_LOCATION(fat) = {
116*4882a593Smuzhiyun .location = ENVL_FAT,
117*4882a593Smuzhiyun ENV_NAME("FAT")
118*4882a593Smuzhiyun #ifdef LOADENV
119*4882a593Smuzhiyun .load = env_fat_load,
120*4882a593Smuzhiyun #endif
121*4882a593Smuzhiyun #ifdef CMD_SAVEENV
122*4882a593Smuzhiyun .save = env_save_ptr(env_fat_save),
123*4882a593Smuzhiyun #endif
124*4882a593Smuzhiyun };
125