--- /dev/null
+/*
+ * (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 <linux/stddef.h>
+#include <malloc.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
+
+__weak int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr)
+{
+ s64 offset;
+
+ offset = CONFIG_ENV_OFFSET;
+#ifdef CONFIG_ENV_OFFSET_REDUND
+ if (copy)
+ offset = CONFIG_ENV_OFFSET_REDUND;
+#endif
+
+ if (offset < 0)
+ offset += mmc->capacity;
+
+ *env_addr = offset;
+
+ return 0;
+}
+
+int env_init(void)
+{
+ /* use default */
+ gd->env_addr = (ulong)&default_environment[0];
+ gd->env_valid = 1;
+
+ return 0;
+}
+
+static int init_mmc_for_env(struct mmc *mmc)
+{
+#ifdef CONFIG_SYS_MMC_ENV_PART
+ int dev = CONFIG_SYS_MMC_ENV_DEV;
+
+#ifdef CONFIG_SPL_BUILD
+ dev = 0;
+#endif
+#endif
+
+ if (!mmc) {
+ puts("No MMC card found\n");
+ return -1;
+ }
+
+ if (mmc_init(mmc)) {
+ puts("MMC init failed\n");
+ return -1;
+ }
+
+#ifdef CONFIG_SYS_MMC_ENV_PART
+ if (CONFIG_SYS_MMC_ENV_PART != mmc->part_num) {
+ if (mmc_switch_part(dev, CONFIG_SYS_MMC_ENV_PART)) {
+ puts("MMC partition switch failed\n");
+ return -1;
+ }
+ }
+#endif
+
+ return 0;
+}
+
+static void fini_mmc_for_env(struct mmc *mmc)
+{
+#ifdef CONFIG_SYS_MMC_ENV_PART
+ int dev = CONFIG_SYS_MMC_ENV_DEV;
+
+#ifdef CONFIG_SPL_BUILD
+ dev = 0;
+#endif
+ if (CONFIG_SYS_MMC_ENV_PART != mmc->part_num)
+ mmc_switch_part(dev, mmc->part_num);
+#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;
+
+ 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 = mmc->block_dev.block_write(CONFIG_SYS_MMC_ENV_DEV, blk_start,
+ blk_cnt, (u_char *)buffer);
+
+ return (n == blk_cnt) ? 0 : -1;
+}
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
+static unsigned char env_flags;
+#endif
+
+int saveenv(void)
+{
+ ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
+ struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV);
+ u32 offset;
+ int ret, copy = 0;
+
+ if (init_mmc_for_env(mmc))
+ return 1;
+
+ ret = env_export(env_new);
+ if (ret)
+ goto fini;
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
+ env_new->flags = ++env_flags; /* increase the serial */
+
+ 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 " : "",
+ CONFIG_SYS_MMC_ENV_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;
+ int dev = CONFIG_SYS_MMC_ENV_DEV;
+
+#ifdef CONFIG_SPL_BUILD
+ dev = 0;
+#endif
+
+ 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 = mmc->block_dev.block_read(dev, 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 crc1_ok = 0, crc2_ok = 0;
+ env_t *ep;
+ int ret;
+ int dev = CONFIG_SYS_MMC_ENV_DEV;
+
+ ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env1, 1);
+ ALLOC_CACHE_ALIGN_BUFFER(env_t, tmp_env2, 1);
+
+#ifdef CONFIG_SPL_BUILD
+ dev = 0;
+#endif
+
+ mmc = find_mmc_device(dev);
+
+ if (init_mmc_for_env(mmc)) {
+ 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");
+
+ crc1_ok = !read1_fail &&
+ (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
+ crc2_ok = !read2_fail &&
+ (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
+
+ if (!crc1_ok && !crc2_ok) {
+ ret = 1;
+ goto fini;
+ } else if (crc1_ok && !crc2_ok) {
+ gd->env_valid = 1;
+ } else if (!crc1_ok && crc2_ok) {
+ gd->env_valid = 2;
+ } else {
+ /* both ok - check serial */
+ if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
+ gd->env_valid = 2;
+ else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
+ gd->env_valid = 1;
+ else if (tmp_env1->flags > tmp_env2->flags)
+ gd->env_valid = 1;
+ else if (tmp_env2->flags > tmp_env1->flags)
+ gd->env_valid = 2;
+ else /* flags are equal - almost impossible */
+ gd->env_valid = 1;
+ }
+
+ free(env_ptr);
+
+ if (gd->env_valid == 1)
+ ep = tmp_env1;
+ else
+ ep = tmp_env2;
+
+ env_flags = ep->flags;
+ env_import((char *)ep, 0);
+ ret = 0;
+
+fini:
+ fini_mmc_for_env(mmc);
+err:
+ if (ret)
+ set_default_env(NULL);
+
+#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 = CONFIG_SYS_MMC_ENV_DEV;
+
+#ifdef CONFIG_SPL_BUILD
+ dev = 0;
+#endif
+
+ mmc = find_mmc_device(dev);
+
+ if (init_mmc_for_env(mmc)) {
+ 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)) {
+ ret = 1;
+ goto fini;
+ }
+
+ env_import(buf, 1);
+ ret = 0;
+
+fini:
+ fini_mmc_for_env(mmc);
+err:
+ if (ret)
+ set_default_env(NULL);
+#endif
+}
+#endif /* CONFIG_ENV_OFFSET_REDUND */
Code Review / kvmfornfv.git / blobdiff