342 lines
6.6 KiB
C
342 lines
6.6 KiB
C
/*
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* (C) Copyright 2008-2011 Freescale Semiconductor, Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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/* #define DEBUG */
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#include <common.h>
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#include <command.h>
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#include <environment.h>
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#include <linux/stddef.h>
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#include <malloc.h>
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#include <memalign.h>
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#include <mmc.h>
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#include <search.h>
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#include <errno.h>
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#if defined(CONFIG_ENV_SIZE_REDUND) && \
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(CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
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#error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
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#endif
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char *env_name_spec = "MMC";
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#ifdef ENV_IS_EMBEDDED
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env_t *env_ptr = &environment;
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#else /* ! ENV_IS_EMBEDDED */
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env_t *env_ptr;
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#endif /* ENV_IS_EMBEDDED */
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DECLARE_GLOBAL_DATA_PTR;
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#if !defined(CONFIG_ENV_OFFSET)
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#define CONFIG_ENV_OFFSET 0
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#endif
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__weak int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr)
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{
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s64 offset;
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offset = CONFIG_ENV_OFFSET;
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#ifdef CONFIG_ENV_OFFSET_REDUND
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if (copy)
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offset = CONFIG_ENV_OFFSET_REDUND;
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#endif
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if (offset < 0)
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offset += mmc->capacity;
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*env_addr = offset;
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return 0;
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}
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int env_init(void)
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{
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/* use default */
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gd->env_addr = (ulong)&default_environment[0];
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gd->env_valid = 1;
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return 0;
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}
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#ifdef CONFIG_SYS_MMC_ENV_PART
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__weak uint mmc_get_env_part(struct mmc *mmc)
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{
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return CONFIG_SYS_MMC_ENV_PART;
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}
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static int mmc_set_env_part(struct mmc *mmc)
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{
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uint part = mmc_get_env_part(mmc);
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int dev = CONFIG_SYS_MMC_ENV_DEV;
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int ret = 0;
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#ifdef CONFIG_SPL_BUILD
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dev = 0;
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#endif
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if (part != mmc->part_num) {
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ret = mmc_switch_part(dev, part);
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if (ret)
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puts("MMC partition switch failed\n");
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}
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return ret;
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}
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#else
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static inline int mmc_set_env_part(struct mmc *mmc) {return 0; };
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#endif
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static const char *init_mmc_for_env(struct mmc *mmc)
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{
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if (!mmc)
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return "!No MMC card found";
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if (mmc_init(mmc))
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return "!MMC init failed";
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if (mmc_set_env_part(mmc))
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return "!MMC partition switch failed";
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return NULL;
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}
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static void fini_mmc_for_env(struct mmc *mmc)
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{
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#ifdef CONFIG_SYS_MMC_ENV_PART
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int dev = CONFIG_SYS_MMC_ENV_DEV;
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#ifdef CONFIG_SPL_BUILD
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dev = 0;
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#endif
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if (mmc_get_env_part(mmc) != mmc->part_num)
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mmc_switch_part(dev, mmc->part_num);
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#endif
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}
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#ifdef CONFIG_CMD_SAVEENV
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static inline int write_env(struct mmc *mmc, unsigned long size,
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unsigned long offset, const void *buffer)
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{
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uint blk_start, blk_cnt, n;
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blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;
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blk_cnt = ALIGN(size, mmc->write_bl_len) / mmc->write_bl_len;
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n = mmc->block_dev.block_write(CONFIG_SYS_MMC_ENV_DEV, blk_start,
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blk_cnt, (u_char *)buffer);
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return (n == blk_cnt) ? 0 : -1;
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}
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#ifdef CONFIG_ENV_OFFSET_REDUND
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static unsigned char env_flags;
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#endif
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int saveenv(void)
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{
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ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
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struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV);
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u32 offset;
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int ret, copy = 0;
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const char *errmsg;
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errmsg = init_mmc_for_env(mmc);
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if (errmsg) {
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printf("%s\n", errmsg);
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return 1;
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}
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ret = env_export(env_new);
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if (ret)
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goto fini;
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#ifdef CONFIG_ENV_OFFSET_REDUND
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env_new->flags = ++env_flags; /* increase the serial */
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if (gd->env_valid == 1)
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copy = 1;
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#endif
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if (mmc_get_env_addr(mmc, copy, &offset)) {
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ret = 1;
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goto fini;
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}
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printf("Writing to %sMMC(%d)... ", copy ? "redundant " : "",
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CONFIG_SYS_MMC_ENV_DEV);
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if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)env_new)) {
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puts("failed\n");
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ret = 1;
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goto fini;
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}
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puts("done\n");
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ret = 0;
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#ifdef CONFIG_ENV_OFFSET_REDUND
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gd->env_valid = gd->env_valid == 2 ? 1 : 2;
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#endif
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fini:
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fini_mmc_for_env(mmc);
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return ret;
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}
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#endif /* CONFIG_CMD_SAVEENV */
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static inline int read_env(struct mmc *mmc, unsigned long size,
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unsigned long offset, const void *buffer)
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{
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uint blk_start, blk_cnt, n;
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int dev = CONFIG_SYS_MMC_ENV_DEV;
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#ifdef CONFIG_SPL_BUILD
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dev = 0;
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#endif
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blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
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blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
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n = mmc->block_dev.block_read(dev, blk_start, blk_cnt, (uchar *)buffer);
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return (n == blk_cnt) ? 0 : -1;
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}
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#ifdef CONFIG_ENV_OFFSET_REDUND
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void env_relocate_spec(void)
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{
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#if !defined(ENV_IS_EMBEDDED)
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struct mmc *mmc;
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u32 offset1, offset2;
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int read1_fail = 0, read2_fail = 0;
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int crc1_ok = 0, crc2_ok = 0;
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env_t *ep;
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int ret;
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int dev = CONFIG_SYS_MMC_ENV_DEV;
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const char *errmsg = NULL;
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ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env1, 1);
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ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env2, 1);
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#ifdef CONFIG_SPL_BUILD
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dev = 0;
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#endif
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mmc = find_mmc_device(dev);
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errmsg = init_mmc_for_env(mmc);
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if (errmsg) {
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ret = 1;
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goto err;
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}
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if (mmc_get_env_addr(mmc, 0, &offset1) ||
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mmc_get_env_addr(mmc, 1, &offset2)) {
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ret = 1;
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goto fini;
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}
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read1_fail = read_env(mmc, CONFIG_ENV_SIZE, offset1, tmp_env1);
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read2_fail = read_env(mmc, CONFIG_ENV_SIZE, offset2, tmp_env2);
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if (read1_fail && read2_fail)
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puts("*** Error - No Valid Environment Area found\n");
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else if (read1_fail || read2_fail)
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puts("*** Warning - some problems detected "
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"reading environment; recovered successfully\n");
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crc1_ok = !read1_fail &&
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(crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
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crc2_ok = !read2_fail &&
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(crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
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if (!crc1_ok && !crc2_ok) {
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errmsg = "!bad CRC";
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ret = 1;
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goto fini;
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} else if (crc1_ok && !crc2_ok) {
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gd->env_valid = 1;
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} else if (!crc1_ok && crc2_ok) {
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gd->env_valid = 2;
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} else {
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/* both ok - check serial */
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if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
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gd->env_valid = 2;
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else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
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gd->env_valid = 1;
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else if (tmp_env1->flags > tmp_env2->flags)
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gd->env_valid = 1;
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else if (tmp_env2->flags > tmp_env1->flags)
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gd->env_valid = 2;
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else /* flags are equal - almost impossible */
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gd->env_valid = 1;
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}
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free(env_ptr);
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if (gd->env_valid == 1)
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ep = tmp_env1;
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else
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ep = tmp_env2;
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env_flags = ep->flags;
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env_import((char *)ep, 0);
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ret = 0;
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fini:
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fini_mmc_for_env(mmc);
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err:
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if (ret)
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set_default_env(errmsg);
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#endif
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}
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#else /* ! CONFIG_ENV_OFFSET_REDUND */
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void env_relocate_spec(void)
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{
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#if !defined(ENV_IS_EMBEDDED)
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ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
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struct mmc *mmc;
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u32 offset;
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int ret;
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int dev = CONFIG_SYS_MMC_ENV_DEV;
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const char *errmsg;
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#ifdef CONFIG_SPL_BUILD
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dev = 0;
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#endif
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mmc = find_mmc_device(dev);
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errmsg = init_mmc_for_env(mmc);
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if (errmsg) {
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ret = 1;
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goto err;
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}
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if (mmc_get_env_addr(mmc, 0, &offset)) {
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ret = 1;
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goto fini;
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}
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if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) {
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errmsg = "!read failed";
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ret = 1;
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goto fini;
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}
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env_import(buf, 1);
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ret = 0;
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fini:
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fini_mmc_for_env(mmc);
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err:
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if (ret)
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set_default_env(errmsg);
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#endif
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}
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#endif /* CONFIG_ENV_OFFSET_REDUND */
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