blob: b0cee35a60fd60f80fea0c4b9bbd445993e0c664 [file] [log] [blame]
Peng Fan125d1932016-04-03 21:52:13 +08001/*
2 * (C) Copyright 2010-2016 Freescale Semiconductor, Inc.
3 *
4 * SPDX-License-Identifier: GPL-2.0+
5 */
6
7/* #define DEBUG */
8
9#include <common.h>
10
11#include <command.h>
12#include <environment.h>
13#include <linux/stddef.h>
14#include <errno.h>
15#include <memalign.h>
16#include <sata.h>
17#include <search.h>
18
19#if defined(CONFIG_ENV_SIZE_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
20#error ENV REDUND not supported
21#endif
22
23#if !defined(CONFIG_ENV_OFFSET) || !defined(CONFIG_ENV_SIZE)
24#error CONFIG_ENV_OFFSET or CONFIG_ENV_SIZE not defined
25#endif
26
27char *env_name_spec = "SATA";
28
29DECLARE_GLOBAL_DATA_PTR;
30
31__weak int sata_get_env_dev(void)
32{
33 return CONFIG_SYS_SATA_ENV_DEV;
34}
35
36int env_init(void)
37{
38 /* use default */
39 gd->env_addr = (ulong)&default_environment[0];
40 gd->env_valid = 1;
41
42 return 0;
43}
44
45#ifdef CONFIG_CMD_SAVEENV
46static inline int write_env(struct blk_desc *sata, unsigned long size,
47 unsigned long offset, void *buffer)
48{
49 uint blk_start, blk_cnt, n;
50
51 blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
52 blk_cnt = ALIGN(size, sata->blksz) / sata->blksz;
53
54 n = blk_dwrite(sata, blk_start, blk_cnt, buffer);
55
56 return (n == blk_cnt) ? 0 : -1;
57}
58
59int saveenv(void)
60{
61 ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
62 struct blk_desc *sata = NULL;
63 int env_sata, ret;
64
65 if (sata_initialize())
66 return 1;
67
68 env_sata = sata_get_env_dev();
69
70 sata = sata_get_dev(env_sata);
71 if (sata == NULL) {
72 printf("Unknown SATA(%d) device for environment!\n",
73 env_sata);
74 return 1;
75 }
76
77 ret = env_export(env_new);
78 if (ret)
79 return 1;
80
81 printf("Writing to SATA(%d)...", env_sata);
82 if (write_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, &env_new)) {
83 puts("failed\n");
84 return 1;
85 }
86
87 puts("done\n");
88 return 0;
89}
90#endif /* CONFIG_CMD_SAVEENV */
91
92static inline int read_env(struct blk_desc *sata, unsigned long size,
93 unsigned long offset, void *buffer)
94{
95 uint blk_start, blk_cnt, n;
96
97 blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
98 blk_cnt = ALIGN(size, sata->blksz) / sata->blksz;
99
100 n = blk_dread(sata, blk_start, blk_cnt, buffer);
101
102 return (n == blk_cnt) ? 0 : -1;
103}
104
105void env_relocate_spec(void)
106{
107 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
108 struct blk_desc *sata = NULL;
109 int env_sata;
110
111 if (sata_initialize())
112 return;
113
114 env_sata = sata_get_env_dev();
115
116 sata = sata_get_dev(env_sata);
117 if (sata == NULL) {
118 printf("Unknown SATA(%d) device for environment!\n",
119 env_sata);
120 return;
121 }
122
123 if (read_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, buf))
124 return set_default_env(NULL);
125
126 env_import(buf, 1);
127}