diff options
Diffstat (limited to 'env/mmc.c')
| -rw-r--r-- | env/mmc.c | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/env/mmc.c b/env/mmc.c new file mode 100644 index 0000000000..bb760a00ed --- /dev/null +++ b/env/mmc.c @@ -0,0 +1,326 @@ +/* + * (C) Copyright 2008-2011 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +/* #define DEBUG */ + +#include <common.h> + +#include <command.h> +#include <environment.h> +#include <fdtdec.h> +#include <linux/stddef.h> +#include <malloc.h> +#include <memalign.h> +#include <mmc.h> +#include <search.h> +#include <errno.h> + +#if defined(CONFIG_ENV_SIZE_REDUND) && \ + (CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE) +#error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE +#endif + +char *env_name_spec = "MMC"; + +#ifdef ENV_IS_EMBEDDED +env_t *env_ptr = &environment; +#else /* ! ENV_IS_EMBEDDED */ +env_t *env_ptr; +#endif /* ENV_IS_EMBEDDED */ + +DECLARE_GLOBAL_DATA_PTR; + +#if !defined(CONFIG_ENV_OFFSET) +#define CONFIG_ENV_OFFSET 0 +#endif + +#if CONFIG_IS_ENABLED(OF_CONTROL) +static inline s64 mmc_offset(int copy) +{ + const char *propname = "u-boot,mmc-env-offset"; + s64 defvalue = CONFIG_ENV_OFFSET; + +#if defined(CONFIG_ENV_OFFSET_REDUND) + if (copy) { + propname = "u-boot,mmc-env-offset-redundant"; + defvalue = CONFIG_ENV_OFFSET_REDUND; + } +#endif + + return fdtdec_get_config_int(gd->fdt_blob, propname, defvalue); +} +#else +static inline s64 mmc_offset(int copy) +{ + s64 offset = CONFIG_ENV_OFFSET; + +#if defined(CONFIG_ENV_OFFSET_REDUND) + if (copy) + offset = CONFIG_ENV_OFFSET_REDUND; +#endif + return offset; +} +#endif + +__weak int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr) +{ + s64 offset = mmc_offset(copy); + + if (offset < 0) + offset += mmc->capacity; + + *env_addr = offset; + + return 0; +} + +__weak int mmc_get_env_dev(void) +{ + return CONFIG_SYS_MMC_ENV_DEV; +} + +int env_init(void) +{ + /* use default */ + gd->env_addr = (ulong)&default_environment[0]; + gd->env_valid = 1; + + return 0; +} + +#ifdef CONFIG_SYS_MMC_ENV_PART +__weak uint mmc_get_env_part(struct mmc *mmc) +{ + return CONFIG_SYS_MMC_ENV_PART; +} + +static unsigned char env_mmc_orig_hwpart; + +static int mmc_set_env_part(struct mmc *mmc) +{ + uint part = mmc_get_env_part(mmc); + int dev = mmc_get_env_dev(); + int ret = 0; + + env_mmc_orig_hwpart = mmc_get_blk_desc(mmc)->hwpart; + ret = blk_select_hwpart_devnum(IF_TYPE_MMC, dev, part); + if (ret) + puts("MMC partition switch failed\n"); + + return ret; +} +#else +static inline int mmc_set_env_part(struct mmc *mmc) {return 0; }; +#endif + +static const char *init_mmc_for_env(struct mmc *mmc) +{ + if (!mmc) + return "!No MMC card found"; + +#ifdef CONFIG_BLK + struct udevice *dev; + + if (blk_get_from_parent(mmc->dev, &dev)) + return "!No block device"; +#else + if (mmc_init(mmc)) + return "!MMC init failed"; +#endif + if (mmc_set_env_part(mmc)) + return "!MMC partition switch failed"; + + return NULL; +} + +static void fini_mmc_for_env(struct mmc *mmc) +{ +#ifdef CONFIG_SYS_MMC_ENV_PART + int dev = mmc_get_env_dev(); + + blk_select_hwpart_devnum(IF_TYPE_MMC, dev, env_mmc_orig_hwpart); +#endif +} + +#ifdef CONFIG_CMD_SAVEENV +static inline int write_env(struct mmc *mmc, unsigned long size, + unsigned long offset, const void *buffer) +{ + uint blk_start, blk_cnt, n; + struct blk_desc *desc = mmc_get_blk_desc(mmc); + + blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len; + blk_cnt = ALIGN(size, mmc->write_bl_len) / mmc->write_bl_len; + + n = blk_dwrite(desc, blk_start, blk_cnt, (u_char *)buffer); + + return (n == blk_cnt) ? 0 : -1; +} + +int saveenv(void) +{ + ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1); + int dev = mmc_get_env_dev(); + struct mmc *mmc = find_mmc_device(dev); + u32 offset; + int ret, copy = 0; + const char *errmsg; + + errmsg = init_mmc_for_env(mmc); + if (errmsg) { + printf("%s\n", errmsg); + return 1; + } + + ret = env_export(env_new); + if (ret) + goto fini; + +#ifdef CONFIG_ENV_OFFSET_REDUND + if (gd->env_valid == 1) + copy = 1; +#endif + + if (mmc_get_env_addr(mmc, copy, &offset)) { + ret = 1; + goto fini; + } + + printf("Writing to %sMMC(%d)... ", copy ? "redundant " : "", dev); + if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)env_new)) { + puts("failed\n"); + ret = 1; + goto fini; + } + + puts("done\n"); + ret = 0; + +#ifdef CONFIG_ENV_OFFSET_REDUND + gd->env_valid = gd->env_valid == 2 ? 1 : 2; +#endif + +fini: + fini_mmc_for_env(mmc); + return ret; +} +#endif /* CONFIG_CMD_SAVEENV */ + +static inline int read_env(struct mmc *mmc, unsigned long size, + unsigned long offset, const void *buffer) +{ + uint blk_start, blk_cnt, n; + struct blk_desc *desc = mmc_get_blk_desc(mmc); + + blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len; + blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len; + + n = blk_dread(desc, blk_start, blk_cnt, (uchar *)buffer); + + return (n == blk_cnt) ? 0 : -1; +} + +#ifdef CONFIG_ENV_OFFSET_REDUND +void env_relocate_spec(void) +{ +#if !defined(ENV_IS_EMBEDDED) + struct mmc *mmc; + u32 offset1, offset2; + int read1_fail = 0, read2_fail = 0; + int ret; + int dev = mmc_get_env_dev(); + const char *errmsg = NULL; + + ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env1, 1); + ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env2, 1); + + mmc = find_mmc_device(dev); + + errmsg = init_mmc_for_env(mmc); + if (errmsg) { + ret = 1; + goto err; + } + + if (mmc_get_env_addr(mmc, 0, &offset1) || + mmc_get_env_addr(mmc, 1, &offset2)) { + ret = 1; + goto fini; + } + + read1_fail = read_env(mmc, CONFIG_ENV_SIZE, offset1, tmp_env1); + read2_fail = read_env(mmc, CONFIG_ENV_SIZE, offset2, tmp_env2); + + if (read1_fail && read2_fail) + puts("*** Error - No Valid Environment Area found\n"); + else if (read1_fail || read2_fail) + puts("*** Warning - some problems detected " + "reading environment; recovered successfully\n"); + + if (read1_fail && read2_fail) { + errmsg = "!bad CRC"; + ret = 1; + goto fini; + } else if (!read1_fail && read2_fail) { + gd->env_valid = 1; + env_import((char *)tmp_env1, 1); + } else if (read1_fail && !read2_fail) { + gd->env_valid = 2; + env_import((char *)tmp_env2, 1); + } else { + env_import_redund((char *)tmp_env1, (char *)tmp_env2); + } + + ret = 0; + +fini: + fini_mmc_for_env(mmc); +err: + if (ret) + set_default_env(errmsg); +#endif +} +#else /* ! CONFIG_ENV_OFFSET_REDUND */ +void env_relocate_spec(void) +{ +#if !defined(ENV_IS_EMBEDDED) + ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE); + struct mmc *mmc; + u32 offset; + int ret; + int dev = mmc_get_env_dev(); + const char *errmsg; + + mmc = find_mmc_device(dev); + + errmsg = init_mmc_for_env(mmc); + if (errmsg) { + ret = 1; + goto err; + } + + if (mmc_get_env_addr(mmc, 0, &offset)) { + ret = 1; + goto fini; + } + + if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) { + errmsg = "!read failed"; + ret = 1; + goto fini; + } + + env_import(buf, 1); + ret = 0; + +fini: + fini_mmc_for_env(mmc); +err: + if (ret) + set_default_env(errmsg); +#endif +} +#endif /* CONFIG_ENV_OFFSET_REDUND */ |