1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2008-2011 Freescale Semiconductor, Inc.
11 #include <environment.h>
13 #include <linux/stddef.h>
22 #define STR(X) __STR(X)
24 #if defined(CONFIG_ENV_SIZE_REDUND) && \
25 (CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
26 #error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
29 DECLARE_GLOBAL_DATA_PTR;
31 #if !defined(CONFIG_ENV_OFFSET)
32 #define CONFIG_ENV_OFFSET 0
35 #if CONFIG_IS_ENABLED(OF_CONTROL)
36 static inline int mmc_offset_try_partition(const char *str, s64 *val)
38 disk_partition_t info;
39 struct blk_desc *desc;
42 ret = blk_get_device_by_str("mmc", STR(CONFIG_SYS_MMC_ENV_DEV), &desc);
47 ret = part_get_info(desc, i, &info);
51 if (!strncmp((const char *)info.name, str, sizeof(str)))
55 /* round up to info.blksz */
56 len = (CONFIG_ENV_SIZE + info.blksz - 1) & ~(info.blksz - 1);
58 /* use the top of the partion for the environment */
59 *val = (info.start + info.size - 1) - len / info.blksz;
64 static inline s64 mmc_offset(int copy)
67 const char *offset_redund;
68 const char *partition;
71 .offset_redund = "u-boot,mmc-env-offset-redundant",
72 .partition = "u-boot,mmc-env-partition",
73 .offset = "u-boot,mmc-env-offset",
75 s64 val = 0, defvalue;
80 /* look for the partition in mmc CONFIG_SYS_MMC_ENV_DEV */
81 str = fdtdec_get_config_string(gd->fdt_blob, dt_prop.partition);
83 /* try to place the environment at end of the partition */
84 err = mmc_offset_try_partition(str, &val);
89 defvalue = CONFIG_ENV_OFFSET;
90 propname = dt_prop.offset;
92 #if defined(CONFIG_ENV_OFFSET_REDUND)
94 defvalue = CONFIG_ENV_OFFSET_REDUND;
95 propname = dt_prop.offset_redund;
98 return fdtdec_get_config_int(gd->fdt_blob, propname, defvalue);
101 static inline s64 mmc_offset(int copy)
103 s64 offset = CONFIG_ENV_OFFSET;
105 #if defined(CONFIG_ENV_OFFSET_REDUND)
107 offset = CONFIG_ENV_OFFSET_REDUND;
113 __weak int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr)
115 s64 offset = mmc_offset(copy);
118 offset += mmc->capacity;
125 __weak int mmc_get_env_dev(void)
127 return CONFIG_SYS_MMC_ENV_DEV;
130 #ifdef CONFIG_SYS_MMC_ENV_PART
131 __weak uint mmc_get_env_part(struct mmc *mmc)
133 return CONFIG_SYS_MMC_ENV_PART;
136 static unsigned char env_mmc_orig_hwpart;
138 static int mmc_set_env_part(struct mmc *mmc)
140 uint part = mmc_get_env_part(mmc);
141 int dev = mmc_get_env_dev();
144 env_mmc_orig_hwpart = mmc_get_blk_desc(mmc)->hwpart;
145 ret = blk_select_hwpart_devnum(IF_TYPE_MMC, dev, part);
147 puts("MMC partition switch failed\n");
152 static inline int mmc_set_env_part(struct mmc *mmc) {return 0; };
155 static const char *init_mmc_for_env(struct mmc *mmc)
158 return "No MMC card found";
160 #if CONFIG_IS_ENABLED(BLK)
163 if (blk_get_from_parent(mmc->dev, &dev))
164 return "No block device";
167 return "MMC init failed";
169 if (mmc_set_env_part(mmc))
170 return "MMC partition switch failed";
175 static void fini_mmc_for_env(struct mmc *mmc)
177 #ifdef CONFIG_SYS_MMC_ENV_PART
178 int dev = mmc_get_env_dev();
180 blk_select_hwpart_devnum(IF_TYPE_MMC, dev, env_mmc_orig_hwpart);
184 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_SPL_BUILD)
185 static inline int write_env(struct mmc *mmc, unsigned long size,
186 unsigned long offset, const void *buffer)
188 uint blk_start, blk_cnt, n;
189 struct blk_desc *desc = mmc_get_blk_desc(mmc);
191 blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;
192 blk_cnt = ALIGN(size, mmc->write_bl_len) / mmc->write_bl_len;
194 n = blk_dwrite(desc, blk_start, blk_cnt, (u_char *)buffer);
196 return (n == blk_cnt) ? 0 : -1;
199 static int env_mmc_save(void)
201 ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
202 int dev = mmc_get_env_dev();
203 struct mmc *mmc = find_mmc_device(dev);
208 errmsg = init_mmc_for_env(mmc);
210 printf("%s\n", errmsg);
214 ret = env_export(env_new);
218 #ifdef CONFIG_ENV_OFFSET_REDUND
219 if (gd->env_valid == ENV_VALID)
223 if (mmc_get_env_addr(mmc, copy, &offset)) {
228 printf("Writing to %sMMC(%d)... ", copy ? "redundant " : "", dev);
229 if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)env_new)) {
237 #ifdef CONFIG_ENV_OFFSET_REDUND
238 gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
242 fini_mmc_for_env(mmc);
245 #endif /* CONFIG_CMD_SAVEENV && !CONFIG_SPL_BUILD */
247 static inline int read_env(struct mmc *mmc, unsigned long size,
248 unsigned long offset, const void *buffer)
250 uint blk_start, blk_cnt, n;
251 struct blk_desc *desc = mmc_get_blk_desc(mmc);
253 blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
254 blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
256 n = blk_dread(desc, blk_start, blk_cnt, (uchar *)buffer);
258 return (n == blk_cnt) ? 0 : -1;
261 #ifdef CONFIG_ENV_OFFSET_REDUND
262 static int env_mmc_load(void)
264 #if !defined(ENV_IS_EMBEDDED)
266 u32 offset1, offset2;
267 int read1_fail = 0, read2_fail = 0;
269 int dev = mmc_get_env_dev();
270 const char *errmsg = NULL;
272 ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env1, 1);
273 ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env2, 1);
275 mmc_initialize(NULL);
277 mmc = find_mmc_device(dev);
279 errmsg = init_mmc_for_env(mmc);
285 if (mmc_get_env_addr(mmc, 0, &offset1) ||
286 mmc_get_env_addr(mmc, 1, &offset2)) {
291 read1_fail = read_env(mmc, CONFIG_ENV_SIZE, offset1, tmp_env1);
292 read2_fail = read_env(mmc, CONFIG_ENV_SIZE, offset2, tmp_env2);
294 ret = env_import_redund((char *)tmp_env1, read1_fail, (char *)tmp_env2,
298 fini_mmc_for_env(mmc);
301 set_default_env(errmsg, 0);
306 #else /* ! CONFIG_ENV_OFFSET_REDUND */
307 static int env_mmc_load(void)
309 #if !defined(ENV_IS_EMBEDDED)
310 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
314 int dev = mmc_get_env_dev();
317 mmc = find_mmc_device(dev);
319 errmsg = init_mmc_for_env(mmc);
325 if (mmc_get_env_addr(mmc, 0, &offset)) {
330 if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) {
331 errmsg = "!read failed";
336 ret = env_import(buf, 1);
339 fini_mmc_for_env(mmc);
342 set_default_env(errmsg, 0);
346 #endif /* CONFIG_ENV_OFFSET_REDUND */
348 U_BOOT_ENV_LOCATION(mmc) = {
349 .location = ENVL_MMC,
351 .load = env_mmc_load,
352 #ifndef CONFIG_SPL_BUILD
353 .save = env_save_ptr(env_mmc_save),