2 * (C) Copyright 2008-2011 Freescale Semiconductor, Inc.
4 * SPDX-License-Identifier: GPL-2.0+
12 #include <environment.h>
14 #include <linux/stddef.h>
21 #if defined(CONFIG_ENV_SIZE_REDUND) && \
22 (CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
23 #error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
26 char *env_name_spec = "MMC";
28 #ifdef ENV_IS_EMBEDDED
29 env_t *env_ptr = &environment;
30 #else /* ! ENV_IS_EMBEDDED */
32 #endif /* ENV_IS_EMBEDDED */
34 DECLARE_GLOBAL_DATA_PTR;
36 #if !defined(CONFIG_ENV_OFFSET)
37 #define CONFIG_ENV_OFFSET 0
40 #if CONFIG_IS_ENABLED(OF_CONTROL)
41 static inline s64 mmc_offset(int copy)
43 const char *propname = "u-boot,mmc-env-offset";
44 s64 defvalue = CONFIG_ENV_OFFSET;
46 #if defined(CONFIG_ENV_OFFSET_REDUND)
48 propname = "u-boot,mmc-env-offset-redundant";
49 defvalue = CONFIG_ENV_OFFSET_REDUND;
53 return fdtdec_get_config_int(gd->fdt_blob, propname, defvalue);
56 static inline s64 mmc_offset(int copy)
58 s64 offset = CONFIG_ENV_OFFSET;
60 #if defined(CONFIG_ENV_OFFSET_REDUND)
62 offset = CONFIG_ENV_OFFSET_REDUND;
68 __weak int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr)
70 s64 offset = mmc_offset(copy);
73 offset += mmc->capacity;
80 __weak int mmc_get_env_dev(void)
82 return CONFIG_SYS_MMC_ENV_DEV;
88 gd->env_addr = (ulong)&default_environment[0];
89 gd->env_valid = ENV_VALID;
94 #ifdef CONFIG_SYS_MMC_ENV_PART
95 __weak uint mmc_get_env_part(struct mmc *mmc)
97 return CONFIG_SYS_MMC_ENV_PART;
100 static unsigned char env_mmc_orig_hwpart;
102 static int mmc_set_env_part(struct mmc *mmc)
104 uint part = mmc_get_env_part(mmc);
105 int dev = mmc_get_env_dev();
108 env_mmc_orig_hwpart = mmc_get_blk_desc(mmc)->hwpart;
109 ret = blk_select_hwpart_devnum(IF_TYPE_MMC, dev, part);
111 puts("MMC partition switch failed\n");
116 static inline int mmc_set_env_part(struct mmc *mmc) {return 0; };
119 static const char *init_mmc_for_env(struct mmc *mmc)
122 return "!No MMC card found";
127 if (blk_get_from_parent(mmc->dev, &dev))
128 return "!No block device";
131 return "!MMC init failed";
133 if (mmc_set_env_part(mmc))
134 return "!MMC partition switch failed";
139 static void fini_mmc_for_env(struct mmc *mmc)
141 #ifdef CONFIG_SYS_MMC_ENV_PART
142 int dev = mmc_get_env_dev();
144 blk_select_hwpart_devnum(IF_TYPE_MMC, dev, env_mmc_orig_hwpart);
148 #ifdef CONFIG_CMD_SAVEENV
149 static inline int write_env(struct mmc *mmc, unsigned long size,
150 unsigned long offset, const void *buffer)
152 uint blk_start, blk_cnt, n;
153 struct blk_desc *desc = mmc_get_blk_desc(mmc);
155 blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;
156 blk_cnt = ALIGN(size, mmc->write_bl_len) / mmc->write_bl_len;
158 n = blk_dwrite(desc, blk_start, blk_cnt, (u_char *)buffer);
160 return (n == blk_cnt) ? 0 : -1;
165 ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
166 int dev = mmc_get_env_dev();
167 struct mmc *mmc = find_mmc_device(dev);
172 errmsg = init_mmc_for_env(mmc);
174 printf("%s\n", errmsg);
178 ret = env_export(env_new);
182 #ifdef CONFIG_ENV_OFFSET_REDUND
183 if (gd->env_valid == ENV_VALID)
187 if (mmc_get_env_addr(mmc, copy, &offset)) {
192 printf("Writing to %sMMC(%d)... ", copy ? "redundant " : "", dev);
193 if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)env_new)) {
202 #ifdef CONFIG_ENV_OFFSET_REDUND
203 gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
207 fini_mmc_for_env(mmc);
210 #endif /* CONFIG_CMD_SAVEENV */
212 static inline int read_env(struct mmc *mmc, unsigned long size,
213 unsigned long offset, const void *buffer)
215 uint blk_start, blk_cnt, n;
216 struct blk_desc *desc = mmc_get_blk_desc(mmc);
218 blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
219 blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
221 n = blk_dread(desc, blk_start, blk_cnt, (uchar *)buffer);
223 return (n == blk_cnt) ? 0 : -1;
226 #ifdef CONFIG_ENV_OFFSET_REDUND
227 void env_relocate_spec(void)
229 #if !defined(ENV_IS_EMBEDDED)
231 u32 offset1, offset2;
232 int read1_fail = 0, read2_fail = 0;
234 int dev = mmc_get_env_dev();
235 const char *errmsg = NULL;
237 ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env1, 1);
238 ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env2, 1);
240 mmc = find_mmc_device(dev);
242 errmsg = init_mmc_for_env(mmc);
248 if (mmc_get_env_addr(mmc, 0, &offset1) ||
249 mmc_get_env_addr(mmc, 1, &offset2)) {
254 read1_fail = read_env(mmc, CONFIG_ENV_SIZE, offset1, tmp_env1);
255 read2_fail = read_env(mmc, CONFIG_ENV_SIZE, offset2, tmp_env2);
257 if (read1_fail && read2_fail)
258 puts("*** Error - No Valid Environment Area found\n");
259 else if (read1_fail || read2_fail)
260 puts("*** Warning - some problems detected "
261 "reading environment; recovered successfully\n");
263 if (read1_fail && read2_fail) {
267 } else if (!read1_fail && read2_fail) {
268 gd->env_valid = ENV_VALID;
269 env_import((char *)tmp_env1, 1);
270 } else if (read1_fail && !read2_fail) {
271 gd->env_valid = ENV_REDUND;
272 env_import((char *)tmp_env2, 1);
274 env_import_redund((char *)tmp_env1, (char *)tmp_env2);
280 fini_mmc_for_env(mmc);
283 set_default_env(errmsg);
286 #else /* ! CONFIG_ENV_OFFSET_REDUND */
287 void env_relocate_spec(void)
289 #if !defined(ENV_IS_EMBEDDED)
290 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
294 int dev = mmc_get_env_dev();
297 mmc = find_mmc_device(dev);
299 errmsg = init_mmc_for_env(mmc);
305 if (mmc_get_env_addr(mmc, 0, &offset)) {
310 if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) {
311 errmsg = "!read failed";
320 fini_mmc_for_env(mmc);
323 set_default_env(errmsg);
326 #endif /* CONFIG_ENV_OFFSET_REDUND */
328 U_BOOT_ENV_LOCATION(mmc) = {
329 .location = ENVL_MMC,
330 .get_char = env_get_char_spec,
331 .load = env_relocate_spec,
332 #ifndef CONFIG_SPL_BUILD
333 .save = env_save_ptr(saveenv),