1 files changed, 397 insertions, 0 deletions

diff --git a/roms/u-boot/env/mmc.c b/roms/u-boot/env/mmc.c
new file mode 100644
index 000000000..09e94f0bd
--- /dev/null
+++ b/roms/u-boot/env/mmc.c
@@ -0,0 +1,397 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2008-2011 Freescale Semiconductor, Inc.
+ */
+
+/* #define DEBUG */
+
+#include <common.h>
+#include <asm/global_data.h>
+
+#include <command.h>
+#include <env.h>
+#include <env_internal.h>
+#include <fdtdec.h>
+#include <linux/stddef.h>
+#include <malloc.h>
+#include <memalign.h>
+#include <mmc.h>
+#include <part.h>
+#include <search.h>
+#include <errno.h>
+
+#define __STR(X) #X
+#define STR(X) __STR(X)
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+static inline int mmc_offset_try_partition(const char *str, int copy, s64 *val)
+{
+	struct disk_partition info;
+	struct blk_desc *desc;
+	int len, i, ret;
+	char dev_str[4];
+
+	snprintf(dev_str, sizeof(dev_str), "%d", mmc_get_env_dev());
+	ret = blk_get_device_by_str("mmc", dev_str, &desc);
+	if (ret < 0)
+		return (ret);
+
+	for (i = 1;;i++) {
+		ret = part_get_info(desc, i, &info);
+		if (ret < 0)
+			return ret;
+
+		if (!strncmp((const char *)info.name, str, sizeof(info.name)))
+			break;
+	}
+
+	/* round up to info.blksz */
+	len = DIV_ROUND_UP(CONFIG_ENV_SIZE, info.blksz);
+
+	/* use the top of the partion for the environment */
+	*val = (info.start + info.size - (1 + copy) * len) * info.blksz;
+
+	return 0;
+}
+
+static inline s64 mmc_offset(int copy)
+{
+	const struct {
+		const char *offset_redund;
+		const char *partition;
+		const char *offset;
+	} dt_prop = {
+		.offset_redund = "u-boot,mmc-env-offset-redundant",
+		.partition = "u-boot,mmc-env-partition",
+		.offset = "u-boot,mmc-env-offset",
+	};
+	s64 val = 0, defvalue;
+	const char *propname;
+	const char *str;
+	int err;
+
+	/* look for the partition in mmc CONFIG_SYS_MMC_ENV_DEV */
+	str = fdtdec_get_config_string(gd->fdt_blob, dt_prop.partition);
+	if (str) {
+		/* try to place the environment at end of the partition */
+		err = mmc_offset_try_partition(str, copy, &val);
+		if (!err)
+			return val;
+	}
+
+	defvalue = CONFIG_ENV_OFFSET;
+	propname = dt_prop.offset;
+
+#if defined(CONFIG_ENV_OFFSET_REDUND)
+	if (copy) {
+		defvalue = CONFIG_ENV_OFFSET_REDUND;
+		propname = dt_prop.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;
+}
+
+#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";
+
+#if CONFIG_IS_ENABLED(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
+}
+
+#if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_SPL_BUILD)
+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;
+}
+
+static int env_mmc_save(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 == ENV_VALID)
+		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;
+	}
+
+	ret = 0;
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
+	gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
+#endif
+
+fini:
+	fini_mmc_for_env(mmc);
+	return ret;
+}
+
+static inline int erase_env(struct mmc *mmc, unsigned long size,
+			    unsigned long offset)
+{
+	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_derase(desc, blk_start, blk_cnt);
+	printf("%d blocks erased: %s\n", n, (n == blk_cnt) ? "OK" : "ERROR");
+
+	return (n == blk_cnt) ? 0 : 1;
+}
+
+static int env_mmc_erase(void)
+{
+	int dev = mmc_get_env_dev();
+	struct mmc *mmc = find_mmc_device(dev);
+	int	ret, copy = 0;
+	u32	offset;
+	const char *errmsg;
+
+	errmsg = init_mmc_for_env(mmc);
+	if (errmsg) {
+		printf("%s\n", errmsg);
+		return 1;
+	}
+
+	if (mmc_get_env_addr(mmc, copy, &offset))
+		return CMD_RET_FAILURE;
+
+	ret = erase_env(mmc, CONFIG_ENV_SIZE, offset);
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
+	copy = 1;
+
+	if (mmc_get_env_addr(mmc, copy, &offset))
+		return CMD_RET_FAILURE;
+
+	ret |= erase_env(mmc, CONFIG_ENV_SIZE, offset);
+#endif
+
+	return ret;
+}
+#endif /* CONFIG_CMD_SAVEENV && !CONFIG_SPL_BUILD */
+
+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
+static int env_mmc_load(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_initialize(NULL);
+
+	mmc = find_mmc_device(dev);
+
+	errmsg = init_mmc_for_env(mmc);
+	if (errmsg) {
+		ret = -EIO;
+		goto err;
+	}
+
+	if (mmc_get_env_addr(mmc, 0, &offset1) ||
+	    mmc_get_env_addr(mmc, 1, &offset2)) {
+		ret = -EIO;
+		goto fini;
+	}
+
+	read1_fail = read_env(mmc, CONFIG_ENV_SIZE, offset1, tmp_env1);
+	read2_fail = read_env(mmc, CONFIG_ENV_SIZE, offset2, tmp_env2);
+
+	ret = env_import_redund((char *)tmp_env1, read1_fail, (char *)tmp_env2,
+				read2_fail, H_EXTERNAL);
+
+fini:
+	fini_mmc_for_env(mmc);
+err:
+	if (ret)
+		env_set_default(errmsg, 0);
+
+#endif
+	return ret;
+}
+#else /* ! CONFIG_ENV_OFFSET_REDUND */
+static int env_mmc_load(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;
+	env_t *ep = NULL;
+
+	mmc = find_mmc_device(dev);
+
+	errmsg = init_mmc_for_env(mmc);
+	if (errmsg) {
+		ret = -EIO;
+		goto err;
+	}
+
+	if (mmc_get_env_addr(mmc, 0, &offset)) {
+		ret = -EIO;
+		goto fini;
+	}
+
+	if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) {
+		errmsg = "!read failed";
+		ret = -EIO;
+		goto fini;
+	}
+
+	ret = env_import(buf, 1, H_EXTERNAL);
+	if (!ret) {
+		ep = (env_t *)buf;
+		gd->env_addr = (ulong)&ep->data;
+	}
+
+fini:
+	fini_mmc_for_env(mmc);
+err:
+	if (ret)
+		env_set_default(errmsg, 0);
+#endif
+	return ret;
+}
+#endif /* CONFIG_ENV_OFFSET_REDUND */
+
+U_BOOT_ENV_LOCATION(mmc) = {
+	.location	= ENVL_MMC,
+	ENV_NAME("MMC")
+	.load		= env_mmc_load,
+#ifndef CONFIG_SPL_BUILD
+	.save		= env_save_ptr(env_mmc_save),
+	.erase		= ENV_ERASE_PTR(env_mmc_erase)
+#endif
+};