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Terry Lva8060352010-05-17 10:57:01 +08001/*
Mingkai Hu97039ab2011-01-24 17:09:55 +00002 * (C) Copyright 2008-2011 Freescale Semiconductor, Inc.
Terry Lva8060352010-05-17 10:57:01 +08003 *
4 * See file CREDITS for list of people who contributed to this
5 * project.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20 * MA 02111-1307 USA
21 */
22
23/* #define DEBUG */
24
25#include <common.h>
26
27#include <command.h>
28#include <environment.h>
29#include <linux/stddef.h>
30#include <malloc.h>
31#include <mmc.h>
Lei Wen6d1d51b2010-11-10 07:39:23 +080032#include <search.h>
Lei Wene79f4832010-10-13 11:07:21 +080033#include <errno.h>
Terry Lva8060352010-05-17 10:57:01 +080034
Terry Lva8060352010-05-17 10:57:01 +080035char *env_name_spec = "MMC";
36
37#ifdef ENV_IS_EMBEDDED
Igor Grinberg994bc672011-11-17 06:07:23 +000038env_t *env_ptr = &environment;
Terry Lva8060352010-05-17 10:57:01 +080039#else /* ! ENV_IS_EMBEDDED */
Igor Grinberge8db8f72011-11-07 01:14:05 +000040env_t *env_ptr;
Terry Lva8060352010-05-17 10:57:01 +080041#endif /* ENV_IS_EMBEDDED */
42
Terry Lva8060352010-05-17 10:57:01 +080043DECLARE_GLOBAL_DATA_PTR;
44
Mingkai Hu97039ab2011-01-24 17:09:55 +000045#if !defined(CONFIG_ENV_OFFSET)
46#define CONFIG_ENV_OFFSET 0
47#endif
48
49static int __mmc_get_env_addr(struct mmc *mmc, u32 *env_addr)
50{
51 *env_addr = CONFIG_ENV_OFFSET;
52 return 0;
53}
Igor Grinberge8db8f72011-11-07 01:14:05 +000054int mmc_get_env_addr(struct mmc *mmc, u32 *env_addr)
55 __attribute__((weak, alias("__mmc_get_env_addr")));
Mingkai Hu97039ab2011-01-24 17:09:55 +000056
Terry Lva8060352010-05-17 10:57:01 +080057int env_init(void)
58{
59 /* use default */
Igor Grinberge8db8f72011-11-07 01:14:05 +000060 gd->env_addr = (ulong)&default_environment[0];
61 gd->env_valid = 1;
Terry Lva8060352010-05-17 10:57:01 +080062
63 return 0;
64}
65
Igor Grinberge8db8f72011-11-07 01:14:05 +000066static int init_mmc_for_env(struct mmc *mmc)
Terry Lva8060352010-05-17 10:57:01 +080067{
68 if (!mmc) {
69 puts("No MMC card found\n");
70 return -1;
71 }
72
73 if (mmc_init(mmc)) {
74 puts("MMC init failed\n");
Igor Grinberge8db8f72011-11-07 01:14:05 +000075 return -1;
Terry Lva8060352010-05-17 10:57:01 +080076 }
77
78 return 0;
79}
80
81#ifdef CONFIG_CMD_SAVEENV
Igor Grinberge8db8f72011-11-07 01:14:05 +000082static inline int write_env(struct mmc *mmc, unsigned long size,
83 unsigned long offset, const void *buffer)
Terry Lva8060352010-05-17 10:57:01 +080084{
85 uint blk_start, blk_cnt, n;
86
Igor Grinberge8db8f72011-11-07 01:14:05 +000087 blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;
88 blk_cnt = ALIGN(size, mmc->write_bl_len) / mmc->write_bl_len;
Terry Lva8060352010-05-17 10:57:01 +080089
90 n = mmc->block_dev.block_write(CONFIG_SYS_MMC_ENV_DEV, blk_start,
91 blk_cnt, (u_char *)buffer);
92
93 return (n == blk_cnt) ? 0 : -1;
94}
95
96int saveenv(void)
97{
Stephen Warren4036b632012-05-24 11:38:33 +000098 ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
Lei Wene79f4832010-10-13 11:07:21 +080099 ssize_t len;
100 char *res;
Terry Lva8060352010-05-17 10:57:01 +0800101 struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV);
Igor Grinberge8db8f72011-11-07 01:14:05 +0000102 u32 offset;
Terry Lva8060352010-05-17 10:57:01 +0800103
Igor Grinberge8db8f72011-11-07 01:14:05 +0000104 if (init_mmc_for_env(mmc) || mmc_get_env_addr(mmc, &offset))
Mingkai Hu97039ab2011-01-24 17:09:55 +0000105 return 1;
106
Stephen Warren4036b632012-05-24 11:38:33 +0000107 res = (char *)&env_new->data;
Wolfgang Denk37f2fe72011-11-06 22:49:44 +0100108 len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, 0, NULL);
Lei Wene79f4832010-10-13 11:07:21 +0800109 if (len < 0) {
110 error("Cannot export environment: errno = %d\n", errno);
111 return 1;
112 }
Igor Grinberge8db8f72011-11-07 01:14:05 +0000113
Stephen Warren4036b632012-05-24 11:38:33 +0000114 env_new->crc = crc32(0, &env_new->data[0], ENV_SIZE);
Terry Lva8060352010-05-17 10:57:01 +0800115 printf("Writing to MMC(%d)... ", CONFIG_SYS_MMC_ENV_DEV);
Stephen Warren4036b632012-05-24 11:38:33 +0000116 if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)env_new)) {
Terry Lva8060352010-05-17 10:57:01 +0800117 puts("failed\n");
118 return 1;
119 }
120
121 puts("done\n");
122 return 0;
123}
124#endif /* CONFIG_CMD_SAVEENV */
125
Igor Grinberge8db8f72011-11-07 01:14:05 +0000126static inline int read_env(struct mmc *mmc, unsigned long size,
127 unsigned long offset, const void *buffer)
Terry Lva8060352010-05-17 10:57:01 +0800128{
129 uint blk_start, blk_cnt, n;
130
Igor Grinberge8db8f72011-11-07 01:14:05 +0000131 blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
132 blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
Terry Lva8060352010-05-17 10:57:01 +0800133
134 n = mmc->block_dev.block_read(CONFIG_SYS_MMC_ENV_DEV, blk_start,
135 blk_cnt, (uchar *)buffer);
136
137 return (n == blk_cnt) ? 0 : -1;
138}
139
140void env_relocate_spec(void)
141{
142#if !defined(ENV_IS_EMBEDDED)
Stephen Warren4036b632012-05-24 11:38:33 +0000143 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
Terry Lva8060352010-05-17 10:57:01 +0800144 struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV);
Mingkai Hu97039ab2011-01-24 17:09:55 +0000145 u32 offset;
Terry Lva8060352010-05-17 10:57:01 +0800146
Igor Grinberge8db8f72011-11-07 01:14:05 +0000147 if (init_mmc_for_env(mmc) || mmc_get_env_addr(mmc, &offset))
148 return set_default_env(NULL);
Terry Lva8060352010-05-17 10:57:01 +0800149
Igor Grinberge8db8f72011-11-07 01:14:05 +0000150 if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf))
151 return set_default_env(NULL);
Terry Lva8060352010-05-17 10:57:01 +0800152
Steve Sakomand470a6f2010-10-11 05:51:39 -0700153 env_import(buf, 1);
Terry Lva8060352010-05-17 10:57:01 +0800154#endif
155}