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https://github.com/brain-hackers/u-boot-brain
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![Jean-Jacques Hiblot](/assets/img/avatar_default.png)
SPL has been restricted to use only dev 0 based on the assumption that only one MMC device is registered. This is not always the case and many platforms now register several devices as expected by the spl mmc boot code For those platform SPL_ENV_SUPPORT is broken if dev is forced to 0. A word of warning: this commit may break SPL_ENV_SUPPORT on platforms that do not register the same MMC controllers in SPL and in u-boot (mostly iMX6 based platforms). Fortunately none of those activate SPL_ENV_SUPPORT in their default configuration. Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
328 lines
6.5 KiB
C
328 lines
6.5 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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__weak int mmc_get_env_dev(void)
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{
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return CONFIG_SYS_MMC_ENV_DEV;
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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 unsigned char env_mmc_orig_hwpart;
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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 = mmc_get_env_dev();
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int ret = 0;
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env_mmc_orig_hwpart = mmc_get_blk_desc(mmc)->hwpart;
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ret = blk_select_hwpart_devnum(IF_TYPE_MMC, dev, part);
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if (ret)
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puts("MMC partition switch failed\n");
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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 = mmc_get_env_dev();
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blk_select_hwpart_devnum(IF_TYPE_MMC, dev, env_mmc_orig_hwpart);
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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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struct blk_desc *desc = mmc_get_blk_desc(mmc);
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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 = blk_dwrite(desc, blk_start, 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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int dev = mmc_get_env_dev();
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struct mmc *mmc = find_mmc_device(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 " : "", 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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struct blk_desc *desc = mmc_get_blk_desc(mmc);
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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 = blk_dread(desc, 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 = mmc_get_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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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 = mmc_get_env_dev();
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const char *errmsg;
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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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