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 #ifdef ENV_IS_EMBEDDED
27 env_t *env_ptr = &environment;
28 #else /* ! ENV_IS_EMBEDDED */
30 #endif /* ENV_IS_EMBEDDED */
32 DECLARE_GLOBAL_DATA_PTR;
34 #if !defined(CONFIG_ENV_OFFSET)
35 #define CONFIG_ENV_OFFSET 0
38 #if CONFIG_IS_ENABLED(OF_CONTROL)
39 static inline s64 mmc_offset(int copy)
41 const char *propname = "u-boot,mmc-env-offset";
42 s64 defvalue = CONFIG_ENV_OFFSET;
44 #if defined(CONFIG_ENV_OFFSET_REDUND)
46 propname = "u-boot,mmc-env-offset-redundant";
47 defvalue = CONFIG_ENV_OFFSET_REDUND;
51 return fdtdec_get_config_int(gd->fdt_blob, propname, defvalue);
54 static inline s64 mmc_offset(int copy)
56 s64 offset = CONFIG_ENV_OFFSET;
58 #if defined(CONFIG_ENV_OFFSET_REDUND)
60 offset = CONFIG_ENV_OFFSET_REDUND;
66 __weak int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr)
68 s64 offset = mmc_offset(copy);
71 offset += mmc->capacity;
78 __weak int mmc_get_env_dev(void)
80 return CONFIG_SYS_MMC_ENV_DEV;
83 #ifdef CONFIG_SYS_MMC_ENV_PART
84 __weak uint mmc_get_env_part(struct mmc *mmc)
86 return CONFIG_SYS_MMC_ENV_PART;
89 static unsigned char env_mmc_orig_hwpart;
91 static int mmc_set_env_part(struct mmc *mmc)
93 uint part = mmc_get_env_part(mmc);
94 int dev = mmc_get_env_dev();
97 env_mmc_orig_hwpart = mmc_get_blk_desc(mmc)->hwpart;
98 ret = blk_select_hwpart_devnum(IF_TYPE_MMC, dev, part);
100 puts("MMC partition switch failed\n");
105 static inline int mmc_set_env_part(struct mmc *mmc) {return 0; };
108 static const char *init_mmc_for_env(struct mmc *mmc)
111 return "!No MMC card found";
116 if (blk_get_from_parent(mmc->dev, &dev))
117 return "!No block device";
120 return "!MMC init failed";
122 if (mmc_set_env_part(mmc))
123 return "!MMC partition switch failed";
128 static void fini_mmc_for_env(struct mmc *mmc)
130 #ifdef CONFIG_SYS_MMC_ENV_PART
131 int dev = mmc_get_env_dev();
133 blk_select_hwpart_devnum(IF_TYPE_MMC, dev, env_mmc_orig_hwpart);
137 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_SPL_BUILD)
138 static inline int write_env(struct mmc *mmc, unsigned long size,
139 unsigned long offset, const void *buffer)
141 uint blk_start, blk_cnt, n;
142 struct blk_desc *desc = mmc_get_blk_desc(mmc);
144 blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;
145 blk_cnt = ALIGN(size, mmc->write_bl_len) / mmc->write_bl_len;
147 n = blk_dwrite(desc, blk_start, blk_cnt, (u_char *)buffer);
149 return (n == blk_cnt) ? 0 : -1;
152 static int env_mmc_save(void)
154 ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
155 int dev = mmc_get_env_dev();
156 struct mmc *mmc = find_mmc_device(dev);
161 errmsg = init_mmc_for_env(mmc);
163 printf("%s\n", errmsg);
167 ret = env_export(env_new);
171 #ifdef CONFIG_ENV_OFFSET_REDUND
172 if (gd->env_valid == ENV_VALID)
176 if (mmc_get_env_addr(mmc, copy, &offset)) {
181 printf("Writing to %sMMC(%d)... ", copy ? "redundant " : "", dev);
182 if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)env_new)) {
191 #ifdef CONFIG_ENV_OFFSET_REDUND
192 gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
196 fini_mmc_for_env(mmc);
199 #endif /* CONFIG_CMD_SAVEENV && !CONFIG_SPL_BUILD */
201 static inline int read_env(struct mmc *mmc, unsigned long size,
202 unsigned long offset, const void *buffer)
204 uint blk_start, blk_cnt, n;
205 struct blk_desc *desc = mmc_get_blk_desc(mmc);
207 blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
208 blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
210 n = blk_dread(desc, blk_start, blk_cnt, (uchar *)buffer);
212 return (n == blk_cnt) ? 0 : -1;
215 #ifdef CONFIG_ENV_OFFSET_REDUND
216 static void env_mmc_load(void)
218 #if !defined(ENV_IS_EMBEDDED)
220 u32 offset1, offset2;
221 int read1_fail = 0, read2_fail = 0;
223 int dev = mmc_get_env_dev();
224 const char *errmsg = NULL;
226 ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env1, 1);
227 ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env2, 1);
229 mmc = find_mmc_device(dev);
231 errmsg = init_mmc_for_env(mmc);
237 if (mmc_get_env_addr(mmc, 0, &offset1) ||
238 mmc_get_env_addr(mmc, 1, &offset2)) {
243 read1_fail = read_env(mmc, CONFIG_ENV_SIZE, offset1, tmp_env1);
244 read2_fail = read_env(mmc, CONFIG_ENV_SIZE, offset2, tmp_env2);
246 if (read1_fail && read2_fail)
247 puts("*** Error - No Valid Environment Area found\n");
248 else if (read1_fail || read2_fail)
249 puts("*** Warning - some problems detected "
250 "reading environment; recovered successfully\n");
252 if (read1_fail && read2_fail) {
256 } else if (!read1_fail && read2_fail) {
257 gd->env_valid = ENV_VALID;
258 env_import((char *)tmp_env1, 1);
259 } else if (read1_fail && !read2_fail) {
260 gd->env_valid = ENV_REDUND;
261 env_import((char *)tmp_env2, 1);
263 env_import_redund((char *)tmp_env1, (char *)tmp_env2);
269 fini_mmc_for_env(mmc);
272 set_default_env(errmsg);
275 #else /* ! CONFIG_ENV_OFFSET_REDUND */
276 static void env_mmc_load(void)
278 #if !defined(ENV_IS_EMBEDDED)
279 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
283 int dev = mmc_get_env_dev();
286 mmc = find_mmc_device(dev);
288 errmsg = init_mmc_for_env(mmc);
294 if (mmc_get_env_addr(mmc, 0, &offset)) {
299 if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) {
300 errmsg = "!read failed";
309 fini_mmc_for_env(mmc);
312 set_default_env(errmsg);
315 #endif /* CONFIG_ENV_OFFSET_REDUND */
317 U_BOOT_ENV_LOCATION(mmc) = {
318 .location = ENVL_MMC,
320 .load = env_mmc_load,
321 #ifndef CONFIG_SPL_BUILD
322 .save = env_save_ptr(env_mmc_save),