common/cmd_mmc.c - github/trini/u-boot - Gitiles

 /*
  * (C) Copyright 2003
  * Kyle Harris, kharris@nexus-tech.net
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */

 #include <common.h>
 #include <command.h>
 #include <mmc.h>

 static int curr_device = -1;
 #ifndef CONFIG_GENERIC_MMC
 int do_mmc (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
 	int dev;

 	if (argc < 2)
 		return CMD_RET_USAGE;

 	if (strcmp(argv[1], "init") == 0) {
 		if (argc == 2) {
 			if (curr_device < 0)
 				dev = 1;
 			else
 				dev = curr_device;
 		} else if (argc == 3) {
 			dev = (int)simple_strtoul(argv[2], NULL, 10);
 		} else {
 			return CMD_RET_USAGE;
 		}

 		if (mmc_legacy_init(dev) != 0) {
 			puts("No MMC card found\n");
 			return 1;
 		}

 		curr_device = dev;
 		printf("mmc%d is available\n", curr_device);
 	} else if (strcmp(argv[1], "device") == 0) {
 		if (argc == 2) {
 			if (curr_device < 0) {
 				puts("No MMC device available\n");
 				return 1;
 			}
 		} else if (argc == 3) {
 			dev = (int)simple_strtoul(argv[2], NULL, 10);

 #ifdef CONFIG_SYS_MMC_SET_DEV
 			if (mmc_set_dev(dev) != 0)
 				return 1;
 #endif
 			curr_device = dev;
 		} else {
 			return CMD_RET_USAGE;
 		}

 		printf("mmc%d is current device\n", curr_device);
 	} else {
 		return CMD_RET_USAGE;
 	}

 	return 0;
 }

 U_BOOT_CMD(
 	mmc, 3, 1, do_mmc,
 	"MMC sub-system",
 	"init [dev] - init MMC sub system\n"
 	"mmc device [dev] - show or set current device"
 );
 #else /* !CONFIG_GENERIC_MMC */

 enum mmc_state {
 	MMC_INVALID,
 	MMC_READ,
 	MMC_WRITE,
 	MMC_ERASE,
 };
 static void print_mmcinfo(struct mmc *mmc)
 {
 	printf("Device: %s\n", mmc->name);
 	printf("Manufacturer ID: %x\n", mmc->cid[0] >> 24);
 	printf("OEM: %x\n", (mmc->cid[0] >> 8) & 0xffff);
 	printf("Name: %c%c%c%c%c \n", mmc->cid[0] & 0xff,
 			(mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
 			(mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff);

 	printf("Tran Speed: %d\n", mmc->tran_speed);
 	printf("Rd Block Len: %d\n", mmc->read_bl_len);

 	printf("%s version %d.%d\n", IS_SD(mmc) ? "SD" : "MMC",
 			(mmc->version >> 8) & 0xf, mmc->version & 0xff);

 	printf("High Capacity: %s\n", mmc->high_capacity ? "Yes" : "No");
 	puts("Capacity: ");
 	print_size(mmc->capacity, "\n");

 	printf("Bus Width: %d-bit\n", mmc->bus_width);
 }

 static int do_mmcinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
 	struct mmc *mmc;

 	if (curr_device < 0) {
 		if (get_mmc_num() > 0)
 			curr_device = 0;
 		else {
 			puts("No MMC device available\n");
 			return 1;
 		}
 	}

 	mmc = find_mmc_device(curr_device);

 	if (mmc) {
 		mmc_init(mmc);

 		print_mmcinfo(mmc);
 		return 0;
 	} else {
 		printf("no mmc device at slot %x\n", curr_device);
 		return 1;
 	}
 }

 U_BOOT_CMD(
 	mmcinfo, 1, 0, do_mmcinfo,
 	"display MMC info",
 	"- display info of the current MMC device"
 );

 #ifdef CONFIG_SUPPORT_EMMC_BOOT
 static int boot_part_access(struct mmc *mmc, u8 ack, u8 part_num, u8 access)
 {
 	int err;
 	err = mmc_boot_part_access(mmc, ack, part_num, access);

 	if ((err == 0) && (access != 0)) {
 		printf("\t\t\t!!!Notice!!!\n");

 		printf("!You must close EMMC boot Partition");
 		printf("after all images are written\n");

 		printf("!EMMC boot partition has continuity");
 		printf("at image writing time.\n");

 		printf("!So, do not close the boot partition");
 		printf("before all images are written.\n");
 		return 0;
 	} else if ((err == 0) && (access == 0))
 		return 0;
 	else if ((err != 0) && (access != 0)) {
 		printf("EMMC boot partition-%d OPEN Failed.\n", part_num);
 		return 1;
 	} else {
 		printf("EMMC boot partition-%d CLOSE Failed.\n", part_num);
 		return 1;
 	}
 }
 #endif

 static int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
 	enum mmc_state state;

 	if (argc < 2)
 		return CMD_RET_USAGE;

 	if (curr_device < 0) {
 		if (get_mmc_num() > 0)
 			curr_device = 0;
 		else {
 			puts("No MMC device available\n");
 			return 1;
 		}
 	}

 	if (strcmp(argv[1], "rescan") == 0) {
 		struct mmc *mmc;

 		if (argc != 2)
 			return CMD_RET_USAGE;

 		mmc = find_mmc_device(curr_device);
 		if (!mmc) {
 			printf("no mmc device at slot %x\n", curr_device);
 			return 1;
 		}

 		mmc->has_init = 0;

 		if (mmc_init(mmc))
 			return 1;
 		else
 			return 0;
 	} else if (strncmp(argv[1], "part", 4) == 0) {
 		block_dev_desc_t *mmc_dev;
 		struct mmc *mmc;

 		if (argc != 2)
 			return CMD_RET_USAGE;

 		mmc = find_mmc_device(curr_device);
 		if (!mmc) {
 			printf("no mmc device at slot %x\n", curr_device);
 			return 1;
 		}
 		mmc_init(mmc);
 		mmc_dev = mmc_get_dev(curr_device);
 		if (mmc_dev != NULL &&
 				mmc_dev->type != DEV_TYPE_UNKNOWN) {
 			print_part(mmc_dev);
 			return 0;
 		}

 		puts("get mmc type error!\n");
 		return 1;
 	} else if (strcmp(argv[1], "list") == 0) {
 		if (argc != 2)
 			return CMD_RET_USAGE;
 		print_mmc_devices('\n');
 		return 0;
 	} else if (strcmp(argv[1], "dev") == 0) {
 		int dev, part = -1;
 		struct mmc *mmc;

 		if (argc == 2)
 			dev = curr_device;
 		else if (argc == 3)
 			dev = simple_strtoul(argv[2], NULL, 10);
 		else if (argc == 4) {
 			dev = (int)simple_strtoul(argv[2], NULL, 10);
 			part = (int)simple_strtoul(argv[3], NULL, 10);
 			if (part > PART_ACCESS_MASK) {
 				printf("#part_num shouldn't be larger"
 					" than %d\n", PART_ACCESS_MASK);
 				return 1;
 			}
 		} else
 			return CMD_RET_USAGE;

 		mmc = find_mmc_device(dev);
 		if (!mmc) {
 			printf("no mmc device at slot %x\n", dev);
 			return 1;
 		}

 		mmc_init(mmc);
 		if (part != -1) {
 			int ret;
 			if (mmc->part_config == MMCPART_NOAVAILABLE) {
 				printf("Card doesn't support part_switch\n");
 				return 1;
 			}

 			if (part != mmc->part_num) {
 				ret = mmc_switch_part(dev, part);
 				if (!ret)
 					mmc->part_num = part;

 				printf("switch to partions #%d, %s\n",
 						part, (!ret) ? "OK" : "ERROR");
 			}
 		}
 		curr_device = dev;
 		if (mmc->part_config == MMCPART_NOAVAILABLE)
 			printf("mmc%d is current device\n", curr_device);
 		else
 			printf("mmc%d(part %d) is current device\n",
 				curr_device, mmc->part_num);

 		return 0;
 #ifdef CONFIG_SUPPORT_EMMC_BOOT
 	} else if ((strcmp(argv[1], "open") == 0) ||
 			(strcmp(argv[1], "close") == 0)) {
 		int dev;
 		struct mmc *mmc;
 		u8 part_num, access = 0;

 		if (argc == 4) {
 			dev = simple_strtoul(argv[2], NULL, 10);
 			part_num = simple_strtoul(argv[3], NULL, 10);
 		} else {
 			return CMD_RET_USAGE;
 		}

 		mmc = find_mmc_device(dev);
 		if (!mmc) {
 			printf("no mmc device at slot %x\n", dev);
 			return 1;
 		}

 		if (IS_SD(mmc)) {
 			printf("SD device cannot be opened/closed\n");
 			return 1;
 		}

 		if ((part_num <= 0) || (part_num > MMC_NUM_BOOT_PARTITION)) {
 			printf("Invalid boot partition number:\n");
 			printf("Boot partition number cannot be <= 0\n");
 			printf("EMMC44 supports only 2 boot partitions\n");
 			return 1;
 		}

 		if (strcmp(argv[1], "open") == 0)
 			access = part_num; /* enable R/W access to boot part*/
 		else
 			access = 0; /* No access to boot partition */

 		/* acknowledge to be sent during boot operation */
 		return boot_part_access(mmc, 1, part_num, access);

 	} else if (strcmp(argv[1], "bootpart") == 0) {
 		int dev;
 		dev = simple_strtoul(argv[2], NULL, 10);

 		u32 bootsize = simple_strtoul(argv[3], NULL, 10);
 		u32 rpmbsize = simple_strtoul(argv[4], NULL, 10);
 		struct mmc *mmc = find_mmc_device(dev);
 		if (!mmc) {
 			printf("no mmc device at slot %x\n", dev);
 			return 1;
 		}

 		if (IS_SD(mmc)) {
 			printf("It is not a EMMC device\n");
 			return 1;
 		}

 		if (0 == mmc_boot_partition_size_change(mmc,
 							bootsize, rpmbsize)) {
 			printf("EMMC boot partition Size %d MB\n", bootsize);
 			printf("EMMC RPMB partition Size %d MB\n", rpmbsize);
 			return 0;
 		} else {
 			printf("EMMC boot partition Size change Failed.\n");
 			return 1;
 		}
 #endif /* CONFIG_SUPPORT_EMMC_BOOT */
 	}
 	state = MMC_INVALID;
 	if (argc == 5 && strcmp(argv[1], "read") == 0)
 		state = MMC_READ;
 	else if (argc == 5 && strcmp(argv[1], "write") == 0)
 		state = MMC_WRITE;
 	else if (argc == 4 && strcmp(argv[1], "erase") == 0)
 		state = MMC_ERASE;

 	if (state != MMC_INVALID) {
 		struct mmc *mmc = find_mmc_device(curr_device);
 		int idx = 2;
 		u32 blk, cnt, n;
 		void *addr;

 		if (state != MMC_ERASE) {
 			addr = (void *)simple_strtoul(argv[idx], NULL, 16);
 			++idx;
 		} else
 			addr = NULL;
 		blk = simple_strtoul(argv[idx], NULL, 16);
 		cnt = simple_strtoul(argv[idx + 1], NULL, 16);

 		if (!mmc) {
 			printf("no mmc device at slot %x\n", curr_device);
 			return 1;
 		}

 		printf("\nMMC %s: dev # %d, block # %d, count %d ... ",
 				argv[1], curr_device, blk, cnt);

 		mmc_init(mmc);

 		if ((state == MMC_WRITE || state == MMC_ERASE)) {
 			if (mmc_getwp(mmc) == 1) {
 				printf("Error: card is write protected!\n");
 				return 1;
 			}
 		}

 		switch (state) {
 		case MMC_READ:
 			n = mmc->block_dev.block_read(curr_device, blk,
 						      cnt, addr);
 			/* flush cache after read */
 			flush_cache((ulong)addr, cnt * 512); /* FIXME */
 			break;
 		case MMC_WRITE:
 			n = mmc->block_dev.block_write(curr_device, blk,
 						      cnt, addr);
 			break;
 		case MMC_ERASE:
 			n = mmc->block_dev.block_erase(curr_device, blk, cnt);
 			break;
 		default:
 			BUG();
 		}

 		printf("%d blocks %s: %s\n",
 				n, argv[1], (n == cnt) ? "OK" : "ERROR");
 		return (n == cnt) ? 0 : 1;
 	}

 	return CMD_RET_USAGE;
 }

 U_BOOT_CMD(
 	mmc, 6, 1, do_mmcops,
 	"MMC sub system",
 	"read addr blk# cnt\n"
 	"mmc write addr blk# cnt\n"
 	"mmc erase blk# cnt\n"
 	"mmc rescan\n"
 	"mmc part - lists available partition on current mmc device\n"
 	"mmc dev [dev] [part] - show or set current mmc device [partition]\n"
 	"mmc list - lists available devices\n"
 #ifdef CONFIG_SUPPORT_EMMC_BOOT
 	"mmc open <dev> <boot_partition>\n"
 	" - Enable boot_part for booting and enable R/W access of boot_part\n"
 	"mmc close <dev> <boot_partition>\n"
 	" - Enable boot_part for booting and disable access to boot_part\n"
 	"mmc bootpart <device num> <boot part size MB> <RPMB part size MB>\n"
 	" - change sizes of boot and RPMB partions of specified device\n"
 #endif
 	);
 #endif /* !CONFIG_GENERIC_MMC */
	/*
	* (C) Copyright 2003
	* Kyle Harris, kharris@nexus-tech.net
	*
	* SPDX-License-Identifier: GPL-2.0+
	*/

	#include <common.h>
	#include <command.h>
	#include <mmc.h>

	static int curr_device = -1;
	#ifndef CONFIG_GENERIC_MMC
	int do_mmc (cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
	{
	int dev;

	if (argc < 2)
	return CMD_RET_USAGE;

	if (strcmp(argv[1], "init") == 0) {
	if (argc == 2) {
	if (curr_device < 0)
	dev = 1;
	else
	dev = curr_device;
	} else if (argc == 3) {
	dev = (int)simple_strtoul(argv[2], NULL, 10);
	} else {
	return CMD_RET_USAGE;
	}

	if (mmc_legacy_init(dev) != 0) {
	puts("No MMC card found\n");
	return 1;
	}

	curr_device = dev;
	printf("mmc%d is available\n", curr_device);
	} else if (strcmp(argv[1], "device") == 0) {
	if (argc == 2) {
	if (curr_device < 0) {
	puts("No MMC device available\n");
	return 1;
	}
	} else if (argc == 3) {
	dev = (int)simple_strtoul(argv[2], NULL, 10);

	#ifdef CONFIG_SYS_MMC_SET_DEV
	if (mmc_set_dev(dev) != 0)
	return 1;
	#endif
	curr_device = dev;
	} else {
	return CMD_RET_USAGE;
	}

	printf("mmc%d is current device\n", curr_device);
	} else {
	return CMD_RET_USAGE;
	}

	return 0;
	}

	U_BOOT_CMD(
	mmc, 3, 1, do_mmc,
	"MMC sub-system",
	"init [dev] - init MMC sub system\n"
	"mmc device [dev] - show or set current device"
	);
	#else /* !CONFIG_GENERIC_MMC */

	enum mmc_state {
	MMC_INVALID,
	MMC_READ,
	MMC_WRITE,
	MMC_ERASE,
	};
	static void print_mmcinfo(struct mmc *mmc)
	{
	printf("Device: %s\n", mmc->name);
	printf("Manufacturer ID: %x\n", mmc->cid[0] >> 24);
	printf("OEM: %x\n", (mmc->cid[0] >> 8) & 0xffff);
	printf("Name: %c%c%c%c%c \n", mmc->cid[0] & 0xff,
	(mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
	(mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff);

	printf("Tran Speed: %d\n", mmc->tran_speed);
	printf("Rd Block Len: %d\n", mmc->read_bl_len);

	printf("%s version %d.%d\n", IS_SD(mmc) ? "SD" : "MMC",
	(mmc->version >> 8) & 0xf, mmc->version & 0xff);

	printf("High Capacity: %s\n", mmc->high_capacity ? "Yes" : "No");
	puts("Capacity: ");
	print_size(mmc->capacity, "\n");

	printf("Bus Width: %d-bit\n", mmc->bus_width);
	}

	static int do_mmcinfo(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
	{
	struct mmc *mmc;

	if (curr_device < 0) {
	if (get_mmc_num() > 0)
	curr_device = 0;
	else {
	puts("No MMC device available\n");
	return 1;
	}
	}

	mmc = find_mmc_device(curr_device);

	if (mmc) {
	mmc_init(mmc);

	print_mmcinfo(mmc);
	return 0;
	} else {
	printf("no mmc device at slot %x\n", curr_device);
	return 1;
	}
	}

	U_BOOT_CMD(
	mmcinfo, 1, 0, do_mmcinfo,
	"display MMC info",
	"- display info of the current MMC device"
	);

	#ifdef CONFIG_SUPPORT_EMMC_BOOT
	static int boot_part_access(struct mmc *mmc, u8 ack, u8 part_num, u8 access)
	{
	int err;
	err = mmc_boot_part_access(mmc, ack, part_num, access);

	if ((err == 0) && (access != 0)) {
	printf("\t\t\t!!!Notice!!!\n");

	printf("!You must close EMMC boot Partition");
	printf("after all images are written\n");

	printf("!EMMC boot partition has continuity");
	printf("at image writing time.\n");

	printf("!So, do not close the boot partition");
	printf("before all images are written.\n");
	return 0;
	} else if ((err == 0) && (access == 0))
	return 0;
	else if ((err != 0) && (access != 0)) {
	printf("EMMC boot partition-%d OPEN Failed.\n", part_num);
	return 1;
	} else {
	printf("EMMC boot partition-%d CLOSE Failed.\n", part_num);
	return 1;
	}
	}
	#endif

	static int do_mmcops(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
	{
	enum mmc_state state;

	if (argc < 2)
	return CMD_RET_USAGE;

	if (curr_device < 0) {
	if (get_mmc_num() > 0)
	curr_device = 0;
	else {
	puts("No MMC device available\n");
	return 1;
	}
	}

	if (strcmp(argv[1], "rescan") == 0) {
	struct mmc *mmc;

	if (argc != 2)
	return CMD_RET_USAGE;

	mmc = find_mmc_device(curr_device);
	if (!mmc) {
	printf("no mmc device at slot %x\n", curr_device);
	return 1;
	}

	mmc->has_init = 0;

	if (mmc_init(mmc))
	return 1;
	else
	return 0;
	} else if (strncmp(argv[1], "part", 4) == 0) {
	block_dev_desc_t *mmc_dev;
	struct mmc *mmc;

	if (argc != 2)
	return CMD_RET_USAGE;

	mmc = find_mmc_device(curr_device);
	if (!mmc) {
	printf("no mmc device at slot %x\n", curr_device);
	return 1;
	}
	mmc_init(mmc);
	mmc_dev = mmc_get_dev(curr_device);
	if (mmc_dev != NULL &&
	mmc_dev->type != DEV_TYPE_UNKNOWN) {
	print_part(mmc_dev);
	return 0;
	}

	puts("get mmc type error!\n");
	return 1;
	} else if (strcmp(argv[1], "list") == 0) {
	if (argc != 2)
	return CMD_RET_USAGE;
	print_mmc_devices('\n');
	return 0;
	} else if (strcmp(argv[1], "dev") == 0) {
	int dev, part = -1;
	struct mmc *mmc;

	if (argc == 2)
	dev = curr_device;
	else if (argc == 3)
	dev = simple_strtoul(argv[2], NULL, 10);
	else if (argc == 4) {
	dev = (int)simple_strtoul(argv[2], NULL, 10);
	part = (int)simple_strtoul(argv[3], NULL, 10);
	if (part > PART_ACCESS_MASK) {
	printf("#part_num shouldn't be larger"
	" than %d\n", PART_ACCESS_MASK);
	return 1;
	}
	} else
	return CMD_RET_USAGE;

	mmc = find_mmc_device(dev);
	if (!mmc) {
	printf("no mmc device at slot %x\n", dev);
	return 1;
	}

	mmc_init(mmc);
	if (part != -1) {
	int ret;
	if (mmc->part_config == MMCPART_NOAVAILABLE) {
	printf("Card doesn't support part_switch\n");
	return 1;
	}

	if (part != mmc->part_num) {
	ret = mmc_switch_part(dev, part);
	if (!ret)
	mmc->part_num = part;

	printf("switch to partions #%d, %s\n",
	part, (!ret) ? "OK" : "ERROR");
	}
	}
	curr_device = dev;
	if (mmc->part_config == MMCPART_NOAVAILABLE)
	printf("mmc%d is current device\n", curr_device);
	else
	printf("mmc%d(part %d) is current device\n",
	curr_device, mmc->part_num);

	return 0;
	#ifdef CONFIG_SUPPORT_EMMC_BOOT
	} else if ((strcmp(argv[1], "open") == 0) \|\|
	(strcmp(argv[1], "close") == 0)) {
	int dev;
	struct mmc *mmc;
	u8 part_num, access = 0;

	if (argc == 4) {
	dev = simple_strtoul(argv[2], NULL, 10);
	part_num = simple_strtoul(argv[3], NULL, 10);
	} else {
	return CMD_RET_USAGE;
	}

	mmc = find_mmc_device(dev);
	if (!mmc) {
	printf("no mmc device at slot %x\n", dev);
	return 1;
	}

	if (IS_SD(mmc)) {
	printf("SD device cannot be opened/closed\n");
	return 1;
	}

	if ((part_num <= 0) \|\| (part_num > MMC_NUM_BOOT_PARTITION)) {
	printf("Invalid boot partition number:\n");
	printf("Boot partition number cannot be <= 0\n");
	printf("EMMC44 supports only 2 boot partitions\n");
	return 1;
	}

	if (strcmp(argv[1], "open") == 0)
	access = part_num; /* enable R/W access to boot part*/
	else
	access = 0; /* No access to boot partition */

	/* acknowledge to be sent during boot operation */
	return boot_part_access(mmc, 1, part_num, access);

	} else if (strcmp(argv[1], "bootpart") == 0) {
	int dev;
	dev = simple_strtoul(argv[2], NULL, 10);

	u32 bootsize = simple_strtoul(argv[3], NULL, 10);
	u32 rpmbsize = simple_strtoul(argv[4], NULL, 10);
	struct mmc *mmc = find_mmc_device(dev);
	if (!mmc) {
	printf("no mmc device at slot %x\n", dev);
	return 1;
	}

	if (IS_SD(mmc)) {
	printf("It is not a EMMC device\n");
	return 1;
	}

	if (0 == mmc_boot_partition_size_change(mmc,
	bootsize, rpmbsize)) {
	printf("EMMC boot partition Size %d MB\n", bootsize);
	printf("EMMC RPMB partition Size %d MB\n", rpmbsize);
	return 0;
	} else {
	printf("EMMC boot partition Size change Failed.\n");
	return 1;
	}
	#endif /* CONFIG_SUPPORT_EMMC_BOOT */
	}
	state = MMC_INVALID;
	if (argc == 5 && strcmp(argv[1], "read") == 0)
	state = MMC_READ;
	else if (argc == 5 && strcmp(argv[1], "write") == 0)
	state = MMC_WRITE;
	else if (argc == 4 && strcmp(argv[1], "erase") == 0)
	state = MMC_ERASE;

	if (state != MMC_INVALID) {
	struct mmc *mmc = find_mmc_device(curr_device);
	int idx = 2;
	u32 blk, cnt, n;
	void *addr;

	if (state != MMC_ERASE) {
	addr = (void *)simple_strtoul(argv[idx], NULL, 16);
	++idx;
	} else
	addr = NULL;
	blk = simple_strtoul(argv[idx], NULL, 16);
	cnt = simple_strtoul(argv[idx + 1], NULL, 16);

	if (!mmc) {
	printf("no mmc device at slot %x\n", curr_device);
	return 1;
	}

	printf("\nMMC %s: dev # %d, block # %d, count %d ... ",
	argv[1], curr_device, blk, cnt);

	mmc_init(mmc);

	if ((state == MMC_WRITE \|\| state == MMC_ERASE)) {
	if (mmc_getwp(mmc) == 1) {
	printf("Error: card is write protected!\n");
	return 1;
	}
	}

	switch (state) {
	case MMC_READ:
	n = mmc->block_dev.block_read(curr_device, blk,
	cnt, addr);
	/* flush cache after read */
	flush_cache((ulong)addr, cnt * 512); /* FIXME */
	break;
	case MMC_WRITE:
	n = mmc->block_dev.block_write(curr_device, blk,
	cnt, addr);
	break;
	case MMC_ERASE:
	n = mmc->block_dev.block_erase(curr_device, blk, cnt);
	break;
	default:
	BUG();
	}

	printf("%d blocks %s: %s\n",
	n, argv[1], (n == cnt) ? "OK" : "ERROR");
	return (n == cnt) ? 0 : 1;
	}

	return CMD_RET_USAGE;
	}

	U_BOOT_CMD(
	mmc, 6, 1, do_mmcops,
	"MMC sub system",
	"read addr blk# cnt\n"
	"mmc write addr blk# cnt\n"
	"mmc erase blk# cnt\n"
	"mmc rescan\n"
	"mmc part - lists available partition on current mmc device\n"
	"mmc dev [dev] [part] - show or set current mmc device [partition]\n"
	"mmc list - lists available devices\n"
	#ifdef CONFIG_SUPPORT_EMMC_BOOT
	"mmc open <dev> <boot_partition>\n"
	" - Enable boot_part for booting and enable R/W access of boot_part\n"
	"mmc close <dev> <boot_partition>\n"
	" - Enable boot_part for booting and disable access to boot_part\n"
	"mmc bootpart <device num> <boot part size MB> <RPMB part size MB>\n"
	" - change sizes of boot and RPMB partions of specified device\n"
	#endif
	);
	#endif /* !CONFIG_GENERIC_MMC */