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;
85 #ifdef CONFIG_SYS_MMC_ENV_PART
86 __weak uint mmc_get_env_part(struct mmc *mmc)
88 return CONFIG_SYS_MMC_ENV_PART;
91 static unsigned char env_mmc_orig_hwpart;
93 static int mmc_set_env_part(struct mmc *mmc)
95 uint part = mmc_get_env_part(mmc);
96 int dev = mmc_get_env_dev();
99 env_mmc_orig_hwpart = mmc_get_blk_desc(mmc)->hwpart;
100 ret = blk_select_hwpart_devnum(IF_TYPE_MMC, dev, part);
102 puts("MMC partition switch failed\n");
107 static inline int mmc_set_env_part(struct mmc *mmc) {return 0; };
110 static const char *init_mmc_for_env(struct mmc *mmc)
113 return "!No MMC card found";
118 if (blk_get_from_parent(mmc->dev, &dev))
119 return "!No block device";
122 return "!MMC init failed";
124 if (mmc_set_env_part(mmc))
125 return "!MMC partition switch failed";
130 static void fini_mmc_for_env(struct mmc *mmc)
132 #ifdef CONFIG_SYS_MMC_ENV_PART
133 int dev = mmc_get_env_dev();
135 blk_select_hwpart_devnum(IF_TYPE_MMC, dev, env_mmc_orig_hwpart);
139 #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_SPL_BUILD)
140 static inline int write_env(struct mmc *mmc, unsigned long size,
141 unsigned long offset, const void *buffer)
143 uint blk_start, blk_cnt, n;
144 struct blk_desc *desc = mmc_get_blk_desc(mmc);
146 blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;
147 blk_cnt = ALIGN(size, mmc->write_bl_len) / mmc->write_bl_len;
149 n = blk_dwrite(desc, blk_start, blk_cnt, (u_char *)buffer);
151 return (n == blk_cnt) ? 0 : -1;
154 static int env_mmc_save(void)
156 ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
157 int dev = mmc_get_env_dev();
158 struct mmc *mmc = find_mmc_device(dev);
163 errmsg = init_mmc_for_env(mmc);
165 printf("%s\n", errmsg);
169 ret = env_export(env_new);
173 #ifdef CONFIG_ENV_OFFSET_REDUND
174 if (gd->env_valid == ENV_VALID)
178 if (mmc_get_env_addr(mmc, copy, &offset)) {
183 printf("Writing to %sMMC(%d)... ", copy ? "redundant " : "", dev);
184 if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)env_new)) {
193 #ifdef CONFIG_ENV_OFFSET_REDUND
194 gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
198 fini_mmc_for_env(mmc);
201 #endif /* CONFIG_CMD_SAVEENV && !CONFIG_SPL_BUILD */
203 static inline int read_env(struct mmc *mmc, unsigned long size,
204 unsigned long offset, const void *buffer)
206 uint blk_start, blk_cnt, n;
207 struct blk_desc *desc = mmc_get_blk_desc(mmc);
209 blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
210 blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
212 n = blk_dread(desc, blk_start, blk_cnt, (uchar *)buffer);
214 return (n == blk_cnt) ? 0 : -1;
217 #ifdef CONFIG_ENV_OFFSET_REDUND
218 static void env_mmc_load(void)
220 #if !defined(ENV_IS_EMBEDDED)
222 u32 offset1, offset2;
223 int read1_fail = 0, read2_fail = 0;
225 int dev = mmc_get_env_dev();
226 const char *errmsg = NULL;
228 ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env1, 1);
229 ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env2, 1);
231 mmc = find_mmc_device(dev);
233 errmsg = init_mmc_for_env(mmc);
239 if (mmc_get_env_addr(mmc, 0, &offset1) ||
240 mmc_get_env_addr(mmc, 1, &offset2)) {
245 read1_fail = read_env(mmc, CONFIG_ENV_SIZE, offset1, tmp_env1);
246 read2_fail = read_env(mmc, CONFIG_ENV_SIZE, offset2, tmp_env2);
248 if (read1_fail && read2_fail)
249 puts("*** Error - No Valid Environment Area found\n");
250 else if (read1_fail || read2_fail)
251 puts("*** Warning - some problems detected "
252 "reading environment; recovered successfully\n");
254 if (read1_fail && read2_fail) {
258 } else if (!read1_fail && read2_fail) {
259 gd->env_valid = ENV_VALID;
260 env_import((char *)tmp_env1, 1);
261 } else if (read1_fail && !read2_fail) {
262 gd->env_valid = ENV_REDUND;
263 env_import((char *)tmp_env2, 1);
265 env_import_redund((char *)tmp_env1, (char *)tmp_env2);
271 fini_mmc_for_env(mmc);
274 set_default_env(errmsg);
277 #else /* ! CONFIG_ENV_OFFSET_REDUND */
278 static void env_mmc_load(void)
280 #if !defined(ENV_IS_EMBEDDED)
281 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
285 int dev = mmc_get_env_dev();
288 mmc = find_mmc_device(dev);
290 errmsg = init_mmc_for_env(mmc);
296 if (mmc_get_env_addr(mmc, 0, &offset)) {
301 if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) {
302 errmsg = "!read failed";
311 fini_mmc_for_env(mmc);
314 set_default_env(errmsg);
317 #endif /* CONFIG_ENV_OFFSET_REDUND */
319 U_BOOT_ENV_LOCATION(mmc) = {
320 .location = ENVL_MMC,
321 .load = env_mmc_load,
322 #ifndef CONFIG_SPL_BUILD
323 .save = env_save_ptr(env_mmc_save),