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8c66497e HS |
1 | /* |
2 | * (C) Copyright 2000-2002 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
5 | * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com> | |
6 | * Andreas Heppel <aheppel@sysgo.de> | |
7 | * | |
8 | * (C) Copyright 2008 Atmel Corporation | |
9 | * | |
10 | * See file CREDITS for list of people who contributed to this | |
11 | * project. | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or | |
14 | * modify it under the terms of the GNU General Public License as | |
15 | * published by the Free Software Foundation; either version 2 of | |
16 | * the License, or (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
26 | * MA 02111-1307 USA | |
27 | */ | |
28 | #include <common.h> | |
8c66497e | 29 | #include <environment.h> |
5b3375ac | 30 | #include <malloc.h> |
8c66497e HS |
31 | #include <spi_flash.h> |
32 | ||
0e8d1586 JCPV |
33 | #ifndef CONFIG_ENV_SPI_BUS |
34 | # define CONFIG_ENV_SPI_BUS 0 | |
8c66497e | 35 | #endif |
0e8d1586 JCPV |
36 | #ifndef CONFIG_ENV_SPI_CS |
37 | # define CONFIG_ENV_SPI_CS 0 | |
8c66497e | 38 | #endif |
0e8d1586 JCPV |
39 | #ifndef CONFIG_ENV_SPI_MAX_HZ |
40 | # define CONFIG_ENV_SPI_MAX_HZ 1000000 | |
8c66497e | 41 | #endif |
0e8d1586 JCPV |
42 | #ifndef CONFIG_ENV_SPI_MODE |
43 | # define CONFIG_ENV_SPI_MODE SPI_MODE_3 | |
8c66497e HS |
44 | #endif |
45 | ||
46 | DECLARE_GLOBAL_DATA_PTR; | |
47 | ||
48 | /* references to names in env_common.c */ | |
49 | extern uchar default_environment[]; | |
50 | extern int default_environment_size; | |
51 | ||
52 | char * env_name_spec = "SPI Flash"; | |
53 | env_t *env_ptr; | |
54 | ||
55 | static struct spi_flash *env_flash; | |
56 | ||
57 | uchar env_get_char_spec(int index) | |
58 | { | |
59 | return *((uchar *)(gd->env_addr + index)); | |
60 | } | |
61 | ||
62 | int saveenv(void) | |
63 | { | |
5b3375ac MF |
64 | u32 saved_size, saved_offset; |
65 | char *saved_buffer = NULL; | |
07efc9e3 | 66 | u32 sector = 1; |
5b3375ac | 67 | int ret; |
07efc9e3 | 68 | |
8c66497e HS |
69 | if (!env_flash) { |
70 | puts("Environment SPI flash not initialized\n"); | |
71 | return 1; | |
72 | } | |
73 | ||
5b3375ac MF |
74 | /* Is the sector larger than the env (i.e. embedded) */ |
75 | if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) { | |
76 | saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE; | |
77 | saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE; | |
78 | saved_buffer = malloc(saved_size); | |
79 | if (!saved_buffer) { | |
80 | ret = 1; | |
81 | goto done; | |
82 | } | |
83 | ret = spi_flash_read(env_flash, saved_offset, saved_size, saved_buffer); | |
84 | if (ret) | |
85 | goto done; | |
86 | } | |
87 | ||
0e8d1586 JCPV |
88 | if (CONFIG_ENV_SIZE > CONFIG_ENV_SECT_SIZE) { |
89 | sector = CONFIG_ENV_SIZE / CONFIG_ENV_SECT_SIZE; | |
90 | if (CONFIG_ENV_SIZE % CONFIG_ENV_SECT_SIZE) | |
07efc9e3 TL |
91 | sector++; |
92 | } | |
93 | ||
8c66497e | 94 | puts("Erasing SPI flash..."); |
5b3375ac MF |
95 | ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET, sector * CONFIG_ENV_SECT_SIZE); |
96 | if (ret) | |
97 | goto done; | |
8c66497e HS |
98 | |
99 | puts("Writing to SPI flash..."); | |
5b3375ac MF |
100 | ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, env_ptr); |
101 | if (ret) | |
102 | goto done; | |
8c66497e | 103 | |
5b3375ac MF |
104 | if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) { |
105 | ret = spi_flash_write(env_flash, saved_offset, saved_size, saved_buffer); | |
106 | if (ret) | |
107 | goto done; | |
108 | } | |
109 | ||
110 | ret = 0; | |
8c66497e | 111 | puts("done\n"); |
5b3375ac MF |
112 | |
113 | done: | |
114 | if (saved_buffer) | |
115 | free(saved_buffer); | |
116 | return ret; | |
8c66497e HS |
117 | } |
118 | ||
119 | void env_relocate_spec(void) | |
120 | { | |
121 | int ret; | |
122 | ||
0e8d1586 JCPV |
123 | env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS, |
124 | CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE); | |
8c66497e HS |
125 | if (!env_flash) |
126 | goto err_probe; | |
127 | ||
0e8d1586 | 128 | ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, env_ptr); |
8c66497e HS |
129 | if (ret) |
130 | goto err_read; | |
131 | ||
132 | if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc) | |
133 | goto err_crc; | |
134 | ||
135 | gd->env_valid = 1; | |
136 | ||
137 | return; | |
138 | ||
139 | err_read: | |
140 | spi_flash_free(env_flash); | |
141 | env_flash = NULL; | |
142 | err_probe: | |
143 | err_crc: | |
144 | puts("*** Warning - bad CRC, using default environment\n\n"); | |
145 | ||
0e8d1586 | 146 | if (default_environment_size > CONFIG_ENV_SIZE) { |
8c66497e HS |
147 | gd->env_valid = 0; |
148 | puts("*** Error - default environment is too large\n\n"); | |
149 | return; | |
150 | } | |
151 | ||
152 | memset(env_ptr, 0, sizeof(env_t)); | |
153 | memcpy(env_ptr->data, default_environment, default_environment_size); | |
154 | env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE); | |
155 | gd->env_valid = 1; | |
156 | } | |
157 | ||
158 | int env_init(void) | |
159 | { | |
160 | /* SPI flash isn't usable before relocation */ | |
161 | gd->env_addr = (ulong)&default_environment[0]; | |
162 | gd->env_valid = 1; | |
163 | ||
164 | return 0; | |
165 | } |