mmc-utils: Merge the lsmmc tool into mmc-utils

The lsmmc tools contains an extensive parser of the CID, CSD, SCR
registers from userspace. The utility works as-is and uses sysfs
to read the register values.

The original code is created by Sebastian Rasmussen and still lives
in an attachment in the mail archive of linux-mmc. It need to be merged
into mmc-utils repository, which is convenient for testing MMC device
from userspace.

Change since v3:
 - Remove the unused EXT_CSD parser in lsmmc.c file.

Signed-off-by: Sebastian Rasmussen <sebras@gmail.com>
Signed-off-by: Chris Ball <chris@printf.net>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>

4 files changed, 2429 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index 0533be3..5e4eb1c 100644
--- a/Makefile
+++ b/Makefile
@@ -4,6 +4,7 @@ CFLAGS ?= -g -O2
 objects = \
 	mmc.o \
 	mmc_cmds.o \
+	lsmmc.o \
 	3rdparty/hmac_sha/hmac_sha2.o \
 	3rdparty/hmac_sha/sha2.o
 
diff --git a/lsmmc.c b/lsmmc.c
new file mode 100644
index 0000000..71e6a58
--- /dev/null
+++ b/lsmmc.c
@@ -0,0 +1,2407 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010-2011
+ * Author: Sebastian Rasmussen <sebastian.rasmussen@stericsson.com>
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *   2. Redistributions in binary form must reproduce the above
+ *      copyright notice, this list of conditions and the following
+ *      disclaimer in the documentation and/or other materials
+ *      provided with the distribution.
+ *   3. Neither the name of the ST-Ericsson SA nor the names of its
+ *      contributors may be used to endorse or promote products
+ *      derived from this software without specific prior written
+ *      permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <assert.h>
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "mmc.h"
+
+#define MASKTOBIT0(high)	\
+	((high >= 0) ? ((1ull << ((high) + 1ull)) - 1ull) : 0ull)
+#define MASK(high, low)		(MASKTOBIT0(high) & ~MASKTOBIT0(low - 1))
+#define BITS(value, high, low)	(((value) & MASK((high), (low))) >> (low))
+#define IDS_MAX			256
+
+struct config {
+	char *idsfile;
+	char *dir;
+	bool verbose;
+	int interfaces;
+	char **interface;
+	char **mmc_ids;
+	char **sd_ids;
+
+	char *type;
+	char *cid;
+	char *csd;
+	char *scr;
+	char *ext_csd;
+};
+
+enum REG_TYPE {
+	CID = 0,
+	CSD,
+	SCR,
+	EXT_CSD,
+};
+
+struct ids_database {
+	char *type;
+	int id;
+	char *manufacturer;
+};
+
+struct ids_database database[] = {
+	{
+		.type = "sd",
+		.id = 0x01,
+		.manufacturer = "Panasonic",
+	},
+	{
+		.type = "sd",
+		.id = 0x02,
+		.manufacturer = "Toshiba/Kingston/Viking",
+	},
+	{
+		.type = "sd",
+		.id = 0x03,
+		.manufacturer = "SanDisk",
+	},
+	{
+		.type = "sd",
+		.id = 0x08,
+		.manufacturer = "Silicon Power",
+	},
+	{
+		.type = "sd",
+		.id = 0x18,
+		.manufacturer = "Infineon",
+	},
+	{
+		.type = "sd",
+		.id = 0x1b,
+		.manufacturer = "Transcend",
+	},
+	{
+		.type = "sd",
+		.id = 0x1c,
+		.manufacturer = "Transcend",
+	},
+	{
+		.type = "sd",
+		.id = 0x1d,
+		.manufacturer = "Corsair",
+	},
+	{
+		.type = "sd",
+		.id = 0x1e,
+		.manufacturer = "Transcend",
+	},
+	{
+		.type = "sd",
+		.id = 0x1f,
+		.manufacturer = "Kingston",
+	},
+	{
+		.type = "sd",
+		.id = 0x28,
+		.manufacturer = "Lexar",
+	},
+	{
+		.type = "sd",
+		.id = 0x30,
+		.manufacturer = "SanDisk",
+	},
+	{
+		.type = "sd",
+		.id = 0x33,
+		.manufacturer = "STMicroelectronics",
+	},
+	{
+		.type = "sd",
+		.id = 0x41,
+		.manufacturer = "Kingston",
+	},
+	{
+		.type = "sd",
+		.id = 0x6f,
+		.manufacturer = "STMicroelectronics",
+	},
+	{
+		.type = "sd",
+		.id = 0x89,
+		.manufacturer = "Unknown",
+	},
+	{
+		.type = "mmc",
+		.id = 0x00,
+		.manufacturer = "SanDisk",
+	},
+	{
+		.type = "mmc",
+		.id = 0x02,
+		.manufacturer = "Kingston/SanDisk",
+	},
+	{
+		.type = "mmc",
+		.id = 0x03,
+		.manufacturer = "Toshiba",
+	},
+	{
+		.type = "mmc",
+		.id = 0x05,
+		.manufacturer = "Unknown",
+	},
+	{
+		.type = "mmc",
+		.id = 0x06,
+		.manufacturer = "Unknown",
+	},
+	{
+		.type = "mmc",
+		.id = 0x11,
+		.manufacturer = "Toshiba",
+	},
+	{
+		.type = "mmc",
+		.id = 0x15,
+		.manufacturer = "Samsung/SanDisk/LG",
+	},
+	{
+		.type = "mmc",
+		.id = 0x37,
+		.manufacturer = "KingMax",
+	},
+	{
+		.type = "mmc",
+		.id = 0x44,
+		.manufacturer = "SanDisk",
+	},
+	{
+		.type = "mmc",
+		.id = 0x2c,
+		.manufacturer = "Kingston",
+	},
+	{
+		.type = "mmc",
+		.id = 0x70,
+		.manufacturer = "Kingston",
+	},
+};
+
+/* Command line parsing functions */
+void usage(void)
+{
+	printf("Usage: print mmc [-h] [-v] <device path ...>\n");
+	printf("\n");
+	printf("Options:\n");
+	printf("\t-h\tShow this help.\n");
+	printf("\t-v\tEnable verbose mode.\n");
+}
+
+int parse_opts(int argc, char **argv, struct config *config)
+{
+	int c;
+
+	while ((c = getopt(argc, argv, "hv")) != -1) {
+		switch (c) {
+		case 'h':
+			usage();
+			return -1;
+		case 'v':
+			config->verbose = true;
+			break;
+		case '?':
+			fprintf(stderr,
+				"Unknown option '%c' encountered.\n\n", c);
+			usage();
+			return -1;
+		case ':':
+			fprintf(stderr,
+				"Argument for option '%c' missing.\n\n", c);
+			usage();
+			return -1;
+		default:
+			fprintf(stderr,
+				"Unimplemented option '%c' encountered.\n", c);
+			break;
+		}
+	}
+
+	if (optind >= argc) {
+		fprintf(stderr, "Expected mmc directory arguments.\n\n");
+		usage();
+		return -1;
+	}
+
+	config->dir = strdup(argv[optind]);
+	return 0;
+}
+
+int parse_ids(struct config *config)
+{
+	unsigned int ids_cnt = sizeof(database) / sizeof(struct ids_database);
+	unsigned int value;
+	char **ids;
+	char *type;
+	int i;
+
+	for (i = 0; i < ids_cnt; i++) {
+		type = database[i].type;
+
+		if (!strcmp(type, "mmc")) {
+			ids = config->mmc_ids;
+		} else if (!strcmp(type, "sd")) {
+			ids = config->sd_ids;
+		} else {
+			fprintf(stderr,
+				"MMC/SD id parse error, unknown type: '%s'.\n",
+				type);
+			return -1;
+		}
+
+		value = database[i].id;
+
+		if (value >= IDS_MAX) {
+			fprintf(stderr,
+				"MMC/SD id parse error, id out of range.\n");
+			return -1;
+		}
+
+		if (ids[value]) {
+			fprintf(stderr,
+				"Duplicate entries: type='%s', id='0x%1x'.\n",
+				type, value);
+			return -1;
+		}
+
+		ids[value] = database[i].manufacturer;
+	}
+
+	return 0;
+}
+
+/* MMC/SD file parsing functions */
+char *read_file(char *name)
+{
+	char *preparsed;
+	char line[4096];
+	FILE *f;
+
+	f = fopen(name, "r");
+	if (!f) {
+		fprintf(stderr, "Could not open MMC/SD file '%s'.\n", name);
+		return NULL;
+	}
+
+	preparsed = fgets(line, sizeof(line), f);
+	if (!preparsed) {
+		if (ferror(f))
+			fprintf(stderr, "Could not read MMC/SD file '%s'.\n",
+				name);
+		else
+			fprintf(stderr,
+				"Could not read data from MMC/SD file '%s'.\n",
+				name);
+
+		if (fclose(f))
+			fprintf(stderr, "Could not close MMC/SD file '%s'.\n",
+				name);
+		return NULL;
+	}
+
+	if (fclose(f)) {
+		fprintf(stderr, "Could not close MMC/SD file '%s'.\n", name);
+		return NULL;
+	}
+
+	line[sizeof(line) - 1] = '\0';
+
+	while (isspace(line[strlen(line) - 1]))
+		line[strlen(line) - 1] = '\0';
+
+	while (isspace(line[0]))
+		strncpy(&line[0], &line[1], sizeof(line));
+
+	return strdup(line);
+}
+
+/* Hexadecimal string parsing functions */
+char *to_binstr(char *hexstr)
+{
+	char *bindigits[] = {
+		"0000", "0001", "0010", "0011", "0100", "0101", "0110", "0111",
+		"1000", "1001", "1010", "1011", "1100", "1101", "1110", "1111",
+	};
+	char *binstr;
+
+	binstr = calloc(strlen(hexstr) * 4 + 1, sizeof(char));
+
+	while (hexstr && *hexstr != '\0') {
+		if (!isxdigit(*hexstr))
+			return NULL;
+
+		if (isdigit(*hexstr))
+			strcat(binstr, bindigits[*hexstr - '0']);
+		else if (islower(*hexstr))
+			strcat(binstr, bindigits[*hexstr - 'a']);
+		else
+			strcat(binstr, bindigits[*hexstr - 'A']);
+
+		hexstr++;
+	}
+
+	return binstr;
+}
+
+void bin_to_unsigned(unsigned int *u, char *binstr, int width)
+{
+	*u = 0;
+	assert(width <= 32);
+
+	while (binstr && *binstr != '\0' && width > 0) {
+		*u <<= 1;
+		*u |= *binstr == '0' ? 0 : 1;
+
+		binstr++;
+		width--;
+	}
+}
+
+void bin_to_ascii(char *a, char *binstr, int width)
+{
+	assert(width % 8 == 0);
+	*a = '\0';
+
+	while (binstr && *binstr != '\0' && width > 0) {
+		unsigned int u;
+		char c[2] = { '\0', '\0' };
+		char *s = &c[0];
+
+		bin_to_unsigned(&u, binstr, 8);
+		c[0] = u;
+
+		strcat(a, s);
+		binstr += 8;
+		width -= 8;
+	}
+}
+
+void parse_bin(char *hexstr, char *fmt, ...)
+{
+	va_list args;
+	char *origstr;
+	char *binstr;
+	unsigned long width = 0;
+
+	binstr = to_binstr(hexstr);
+	origstr = binstr;
+
+	va_start(args, fmt);
+
+	while (binstr && fmt && *fmt != '\0') {
+		if (isdigit(*fmt)) {
+			char *rest;
+
+			errno = 0;
+			width = strtoul(fmt, &rest, 10);
+			if (width == ULONG_MAX && errno != 0)
+				fprintf(stderr, "strtoul()");
+			fmt = rest;
+		} else if (*fmt == 'u') {
+			unsigned int *u = va_arg(args, unsigned int *);
+
+			if (u)
+				bin_to_unsigned(u, binstr, width);
+			binstr += width;
+			width = 0;
+			fmt++;
+		} else if (*fmt == 'r') {
+			binstr += width;
+			width = 0;
+			fmt++;
+		} else if (*fmt == 'a') {
+			char *c = va_arg(args, char *);
+
+			if (c)
+				bin_to_ascii(c, binstr, width);
+			binstr += width;
+			width = 0;
+			fmt++;
+		} else {
+			fmt++;
+		}
+	}
+
+	va_end(args);
+	free(origstr);
+}
+
+/* MMC/SD information parsing functions */
+void print_sd_cid(struct config *config, char *cid)
+{
+	static const char *months[] = {
+		"jan", "feb", "mar", "apr", "may", "jun",
+		"jul", "aug", "sep", "oct", "nov", "dec",
+		"invalid0", "invalid1", "invalid2", "invalid3",
+	};
+	unsigned int mid;
+	char oid[3];
+	char pnm[6];
+	unsigned int prv_major;
+	unsigned int prv_minor;
+	unsigned int psn;
+	unsigned int mdt_month;
+	unsigned int mdt_year;
+	unsigned int crc;
+
+	parse_bin(cid, "8u16a40a4u4u32u4r8u4u7u1r",
+		&mid, &oid[0], &pnm[0], &prv_major, &prv_minor, &psn,
+		&mdt_year, &mdt_month, &crc);
+
+	oid[2] = '\0';
+	pnm[5] = '\0';
+
+	if (config->verbose) {
+		printf("======SD/CID======\n");
+
+		printf("\tMID: 0x%02x (", mid);
+		if (config->sd_ids[mid])
+			printf("%s)\n", config->sd_ids[mid]);
+		else
+			printf("Unlisted)\n");
+
+		printf("\tOID: %s\n", oid);
+		printf("\tPNM: %s\n", pnm);
+		printf("\tPRV: 0x%01x%01x ", prv_major, prv_minor);
+		printf("(%d.%d)\n", prv_major, prv_minor);
+		printf("\tPSN: 0x%08x\n", psn);
+		printf("\tMDT: 0x%02x%01x %d %s\n", mdt_year, mdt_month,
+		       2000 + mdt_year, months[mdt_month]);
+		printf("\tCRC: 0x%02x\n", crc);
+	} else {
+		if (config->sd_ids[mid])
+			printf("manufacturer: '%s' '%s'\n",
+			       config->sd_ids[mid], oid);
+		else
+			printf("manufacturer: 'Unlisted' '%s'\n", oid);
+
+		printf("product: '%s' %d.%d\n", pnm, prv_major, prv_minor);
+		printf("serial: 0x%08x\n", psn);
+		printf("manfacturing date: %d %s\n", 2000 + mdt_year,
+		       months[mdt_month]);
+	}
+}
+
+void print_mmc_cid(struct config *config, char *cid)
+{
+	static const char *months[] = {
+		"jan", "feb", "mar", "apr", "may", "jun",
+		"jul", "aug", "sep", "oct", "nov", "dec",
+		"invalid0", "invalid1", "invalid2", "invalid3",
+	};
+	unsigned int mid;
+	unsigned int cbx;
+	unsigned int oid;
+	char pnm[7];
+	unsigned int prv_major;
+	unsigned int prv_minor;
+	unsigned int psn;
+	unsigned int mdt_month;
+	unsigned int mdt_year;
+	unsigned int crc;
+
+	parse_bin(cid, "8u6r2u8u48a4u4u32u4u4u7u1r",
+		&mid, &cbx, &oid, &pnm[0], &psn, &prv_major, &prv_minor,
+		&mdt_year, &mdt_month, &crc);
+
+	pnm[6] = '\0';
+
+	if (config->verbose) {
+		printf("======MMC/CID======\n");
+
+		printf("\tMID: 0x%02x (", mid);
+		if (config->mmc_ids[mid])
+			printf("%s)\n", config->mmc_ids[mid]);
+		else
+			printf("Unlisted)\n");
+
+		printf("\tCBX: 0x%01x (", cbx);
+		switch (cbx) {
+		case 0:
+			printf("card)\n");
+			break;
+		case 1:
+			printf("BGA)\n");
+			break;
+		case 2:
+			printf("PoP)\n");
+			break;
+		case 3:
+			printf("reserved)\n");
+			break;
+		}
+
+		printf("\tOID: 0x%01x\n", oid);
+		printf("\tPNM: %s\n", pnm);
+		printf("\tPRV: 0x%01x%01x ", prv_major, prv_minor);
+		printf("(%d.%d)\n", prv_major, prv_minor);
+		printf("\tPSN: 0x%08x\n", psn);
+		printf("\tMDT: 0x%01x%01x %d %s\n", mdt_month, mdt_year,
+		       1997 + mdt_year, months[mdt_month]);
+		printf("\tCRC: 0x%02x\n", crc);
+	} else {
+		if (config->mmc_ids[mid])
+			printf("manufacturer: '%s' '%c'\n",
+			       config->mmc_ids[mid], oid);
+		else
+			printf("manufacturer: 'Unlisted' '%c'\n", oid);
+
+		printf("product: '%s' %d.%d\n", pnm, prv_major, prv_minor);
+		printf("serial: 0x%08x\n", psn);
+		printf("manfacturing date: %d %s\n", 1997 + mdt_year,
+		       months[mdt_month]);
+	}
+}
+
+void print_sd_csd(struct config *config, char *csd)
+{
+	unsigned int csd_structure;
+	unsigned int taac_timevalue;
+	unsigned int taac_timeunit;
+	unsigned int nsac;
+	unsigned int tran_speed_timevalue;
+	unsigned int tran_speed_transferrateunit;
+	unsigned int ccc;
+	unsigned int read_bl_len;
+	unsigned int read_bl_partial;
+	unsigned int write_blk_misalign;
+	unsigned int read_blk_misalign;
+	unsigned int dsr_imp;
+	unsigned int c_size;
+	unsigned int vdd_r_curr_min;
+	unsigned int vdd_r_curr_max;
+	unsigned int vdd_w_curr_min;
+	unsigned int vdd_w_curr_max;
+	unsigned int c_size_mult;
+	unsigned int erase_blk_en;
+	unsigned int sector_size;
+	unsigned int wp_grp_size;
+	unsigned int wp_grp_enable;
+	unsigned int r2w_factor;
+	unsigned int write_bl_len;
+	unsigned int write_bl_partial;
+	unsigned int file_format_grp;
+	unsigned int copy;
+	unsigned int perm_write_protect;
+	unsigned int tmp_write_protect;
+	unsigned int file_format;
+	unsigned int crc;
+	unsigned int taac;
+	unsigned int tran_speed;
+
+	parse_bin(csd, "2u", &csd_structure);
+
+	if (csd_structure == 0) {
+		parse_bin(csd, "2u6r1r4u3u8u1r4u3u12u4u1u1u1u1u2r12u3u3u3u3u3u"
+			  "1u7u7u1u2r3u4u1u5r1u1u1u1u2u2r7u1r",
+			  NULL, &taac_timevalue, &taac_timeunit, &nsac,
+			  &tran_speed_timevalue,
+			  &tran_speed_transferrateunit, &ccc,
+			  &read_bl_len, &read_bl_partial,
+			  &write_blk_misalign, &read_blk_misalign,
+			  &dsr_imp, &c_size, &vdd_r_curr_min,
+			  &vdd_r_curr_max, &vdd_w_curr_min,
+			  &vdd_w_curr_max, &c_size_mult, &erase_blk_en,
+			  &sector_size, &wp_grp_size, &wp_grp_enable,
+			  &r2w_factor, &write_bl_len, &write_bl_partial,
+			  &file_format_grp, &copy, &perm_write_protect,
+			  &tmp_write_protect, &file_format, &crc);
+	} else if (csd_structure == 1) {
+		parse_bin(csd, "2u6r1r4u3u8u1r4u3u12u4u1u1u1u1u6r22u1r1u7u7u1u"
+			  "2r3u4u1u5r1u1u1u1u2u2r7u1r",
+			  NULL, &taac_timevalue, &taac_timeunit, &nsac,
+			  &tran_speed_timevalue,
+			  &tran_speed_transferrateunit, &ccc,
+			  &read_bl_len, &read_bl_partial,
+			  &write_blk_misalign, &read_blk_misalign,
+			  &dsr_imp, &c_size, &erase_blk_en, &sector_size,
+			  &wp_grp_size, &wp_grp_enable, &r2w_factor,
+			  &write_bl_len, &write_bl_partial,
+			  &file_format_grp, &copy, &perm_write_protect,
+			  &tmp_write_protect, &file_format, &crc);
+
+		vdd_r_curr_min = 0;
+		c_size_mult = 0;
+	} else {
+		printf("Unknown CSD structure: 0x%1x\n", csd_structure);
+		return;
+	}
+
+	taac = taac_timevalue << 3 | taac_timeunit;
+	tran_speed = tran_speed_timevalue << 3 | tran_speed_transferrateunit;
+
+	if (config->verbose) {
+		float value;
+		unsigned long long blocks = 0;
+		int block_size = 0;
+		unsigned long long memory_capacity;
+
+		printf("======SD/CSD======\n");
+
+		printf("\tCSD_STRUCTURE: %d\n", csd_structure);
+		printf("\tTAAC: 0x%02x (", taac);
+
+		switch (taac_timevalue) {
+		case 0x0:
+			value = 0.0f;
+			break;
+		case 0x1:
+			value = 1.0f;
+			break;
+		case 0x2:
+			value = 1.2f;
+			break;
+		case 0x3:
+			value = 1.3f;
+			break;
+		case 0x4:
+			value = 1.5f;
+			break;
+		case 0x5:
+			value = 2.0f;
+			break;
+		case 0x6:
+			value = 2.5f;
+			break;
+		case 0x7:
+			value = 3.0f;
+			break;
+		case 0x8:
+			value = 3.5f;
+			break;
+		case 0x9:
+			value = 4.0f;
+			break;
+		case 0xa:
+			value = 4.5f;
+			break;
+		case 0xb:
+			value = 5.0f;
+			break;
+		case 0xc:
+			value = 5.5f;
+			break;
+		case 0xd:
+			value = 6.0f;
+			break;
+		case 0xe:
+			value = 7.0f;
+			break;
+		case 0xf:
+			value = 8.0f;
+			break;
+		default:
+			value = 0.0f;
+			break;
+		}
+
+		switch (taac_timeunit) {
+		case 0x0:
+			printf("%.2fns)\n", value * 1.0f);
+			break;
+		case 0x1:
+			printf("%.2fns)\n", value * 10.0f);
+			break;
+		case 0x2:
+			printf("%.2fns)\n", value * 100.0f);
+			break;
+		case 0x3:
+			printf("%.2fus)\n", value * 1.0f);
+			break;
+		case 0x4:
+			printf("%.2fus)\n", value * 10.0f);
+			break;
+		case 0x5:
+			printf("%.2fus)\n", value * 100.0f);
+			break;
+		case 0x6:
+			printf("%.2fms)\n", value * 1.0f);
+			break;
+		case 0x7:
+			printf("%.2fms)\n", value * 10.0f);
+			break;
+		}
+
+		if (csd_structure == 1 && taac != 0x0e)
+			printf("Warn: Invalid TAAC (should be 0x0e)\n");
+
+		printf("\tNSAC: %d clocks\n", nsac);
+		if (csd_structure == 1 && nsac != 0x00)
+			printf("Warn: Invalid NSAC (should be 0x00)\n");
+
+		printf("\tTRAN_SPEED: 0x%02x (", tran_speed);
+		switch (tran_speed_timevalue) {
+		case 0x0:
+			value = 0.0f;
+			break;
+		case 0x1:
+			value = 1.0f;
+			break;
+		case 0x2:
+			value = 1.2f;
+			break;
+		case 0x3:
+			value = 1.3f;
+			break;
+		case 0x4:
+			value = 1.5f;
+			break;
+		case 0x5:
+			value = 2.0f;
+			break;
+		case 0x6:
+			value = 2.5f;
+			break;
+		case 0x7:
+			value = 3.0f;
+			break;
+		case 0x8:
+			value = 3.5f;
+			break;
+		case 0x9:
+			value = 4.0f;
+			break;
+		case 0xa:
+			value = 4.5f;
+			break;
+		case 0xb:
+			value = 5.0f;
+			break;
+		case 0xc:
+			value = 5.5f;
+			break;
+		case 0xd:
+			value = 6.0f;
+			break;
+		case 0xe:
+			value = 7.0f;
+			break;
+		case 0xf:
+			value = 8.0f;
+			break;
+		default:
+			value = 0.0f;
+			break;
+		}
+
+		switch (tran_speed_transferrateunit) {
+		case 0x0:
+			printf("%.2fkbit/s)\n", value * 100.0f);
+			break;
+		case 0x1:
+			printf("%.2fMbit/s)\n", value * 1.0f);
+			break;
+		case 0x2:
+			printf("%.2fMbit/s)\n", value * 10.0f);
+			break;
+		case 0x3:
+			printf("%.2fMbit/s)\n", value * 100.0f);
+			break;
+		default:
+			printf("reserved)\n");
+			break;
+		}
+		if (csd_structure == 0 &&
+		    (tran_speed != 0x32 && tran_speed != 0x5a))
+			printf("Warn: Invalid TRAN_SPEED "
+			       "(should be 0x32 or 0x5a)\n");
+		if (csd_structure == 1 && tran_speed != 0x32 &&
+		    tran_speed != 0x5a && tran_speed != 0x0b &&
+		    tran_speed != 0x2b)
+			printf("Warn: Invalid TRAN_SPEED "
+			       "(should be 0x32, 0x5a, 0x0b or 0x2b\n");
+
+		printf("\tCCC: 0x%03x (class: ", ccc);
+		if (ccc & 0x800)
+			printf("11, ");
+		if (ccc & 0x400)
+			printf("10, ");
+		if (ccc & 0x200)
+			printf("9, ");
+		if (ccc & 0x100)
+			printf("8, ");
+		if (ccc & 0x080)
+			printf("7, ");
+		if (ccc & 0x040)
+			printf("6, ");
+		if (ccc & 0x020)
+			printf("5, ");
+		if (ccc & 0x010)
+			printf("4, ");
+		if (ccc & 0x008)
+			printf("3, ");
+		if (ccc & 0x004)
+			printf("2, ");
+		if (ccc & 0x002)
+			printf("1, ");
+		if (ccc & 0x001)
+			printf("0, ");
+		printf("  )\n");
+
+		if (csd_structure == 0 &&
+		    (ccc != 0x5b5 && ccc != 0x7b5 && ccc != 0x5f5))
+			printf("Warn: Invalid CCC (should be 0x5b5, "
+			       "0x7b5 or 0x5f5)\n");
+		else if (csd_structure == 1 && ccc != 0x5b5 && ccc != 0x7b5)
+			printf("Warn: Invalid CCC (should be 0x5b5 or 0x7b5)\n");
+
+		printf("\tREAD_BL_LEN: 0x%01x (", read_bl_len);
+		switch (read_bl_len) {
+		case 0x9:
+			printf("512 bytes)\n");
+			break;
+		case 0xa:
+			printf("1024 bytes)\n");
+			break;
+		case 0xb:
+			printf("2048 bytes)\n");
+			break;
+		default:
+			printf("reserved bytes)\n");
+			break;
+		}
+
+		if (csd_structure == 1 && read_bl_len != 0x9)
+			printf("Warn: Invalid READ_BL_LEN (should be 0x9)\n");
+
+		printf("\tREAD_BL_PARTIAL: 0x%01x\n", read_bl_partial);
+		if (csd_structure == 0 && read_bl_partial != 0x01)
+			printf("Warn: Invalid READ_BL_PARTIAL (should be 0x01)\n");
+		else if (csd_structure == 1 && read_bl_partial != 0x00)
+			printf("Warn: Invalid READ_BL_PARTIAL (should be 0x00)\n");
+
+		printf("\tWRITE_BLK_MISALIGN: 0x%01x\n", write_blk_misalign);
+		if (csd_structure == 1 && write_blk_misalign != 0x00)
+			printf("Warn: Invalid WRITE_BLK_MISALIGN (should be 0x00)\n");
+
+		printf("\tREAD_BLK_MISALIGN: 0x%01x\n", read_blk_misalign);
+		if (csd_structure == 1 && read_blk_misalign != 0x00)
+			printf("Warn: Invalid READ_BLK_MISALIGN (should be 0x00)\n");
+
+		printf("\tDSR_IMP: 0x%01x\n", dsr_imp);
+
+		if (csd_structure == 0) {
+			int mult;
+			int blocknr;
+			int block_len;
+
+			printf("\tC_SIZE: 0x%03x\n", c_size);
+			printf("\tVDD_R_CURR_MIN: 0x%01x (", vdd_r_curr_min);
+			switch (vdd_r_curr_min) {
+			case 0x0:
+				printf("0.5mA)\n");
+				break;
+			case 0x1:
+				printf("1mA)\n");
+				break;
+			case 0x2:
+				printf("5mA)\n");
+				break;
+			case 0x3:
+				printf("10mA)\n");
+				break;
+			case 0x4:
+				printf("25mA)\n");
+				break;
+			case 0x5:
+				printf("35mA)\n");
+				break;
+			case 0x6:
+				printf("60mA)\n");
+				break;
+			case 0x7:
+				printf("100mA)\n");
+				break;
+			}
+
+			printf("\tVDD_R_CURR_MAX: 0x%01x (", vdd_r_curr_max);
+			switch (vdd_r_curr_max) {
+			case 0x0:
+				printf("1mA)\n");
+				break;
+			case 0x1:
+				printf("5mA)\n");
+				break;
+			case 0x2:
+				printf("10mA)\n");
+				break;
+			case 0x3:
+				printf("25mA)\n");
+				break;
+			case 0x4:
+				printf("35mA)\n");
+				break;
+			case 0x5:
+				printf("45mA)\n");
+				break;
+			case 0x6:
+				printf("80mA)\n");
+				break;
+			case 0x7:
+				printf("200mA)\n");
+				break;
+			}
+
+			printf("\tVDD_W_CURR_MIN: 0x%01x (", vdd_w_curr_min);
+			switch (vdd_w_curr_min) {
+			case 0x0:
+				printf("0.5mA)\n");
+				break;
+			case 0x1:
+				printf("1mA)\n");
+				break;
+			case 0x2:
+				printf("5mA)\n");
+				break;
+			case 0x3:
+				printf("10mA)\n");
+				break;
+			case 0x4:
+				printf("25mA)\n");
+				break;
+			case 0x5:
+				printf("35mA)\n");
+				break;
+			case 0x6:
+				printf("60mA)\n");
+				break;
+			case 0x7:
+				printf("100mA)\n");
+				break;
+			}
+
+			printf("\tVDD_W_CURR_MAX: 0x%01x (", vdd_w_curr_max);
+			switch (vdd_w_curr_max) {
+			case 0x0:
+				printf("1mA)\n");
+				break;
+			case 0x1:
+				printf("5mA)\n");
+				break;
+			case 0x2:
+				printf("10mA)\n");
+				break;
+			case 0x3:
+				printf("25mA)\n");
+				break;
+			case 0x4:
+				printf("35mA)\n");
+				break;
+			case 0x5:
+				printf("45mA)\n");
+				break;
+			case 0x6:
+				printf("80mA)\n");
+				break;
+			case 0x7:
+				printf("200mA)\n");
+				break;
+			}
+
+			printf("\tC_SIZE_MULT: 0x%01x\n", c_size_mult);
+
+			mult = 1 << (c_size_mult + 2);
+			blocknr = (c_size + 1) * mult;
+			block_len = 1 << read_bl_len;
+			blocks = blocknr;
+			block_size = block_len;
+		} else if (csd_structure == 1) {
+			printf("\tC_SIZE: 0x%06x\n", c_size);
+
+			printf("\tERASE_BLK_EN: 0x%01x\n", erase_blk_en);
+			if (erase_blk_en != 0x01)
+				printf("Warn: Invalid ERASE_BLK_EN (should be 0x01)\n");
+
+			printf("\tSECTOR_SIZE: 0x%02x (Erasable sector: %d blocks)\n",
+			       sector_size, sector_size + 1);
+			if (sector_size != 0x7f)
+				printf("Warn: Invalid SECTOR_SIZE (should be 0x7f)\n");
+
+			printf("\tWP_GRP_SIZE: 0x%02x (Write protect group: %d blocks)\n",
+			       wp_grp_size, wp_grp_size + 1);
+			if (wp_grp_size != 0x00)
+				printf("Warn: Invalid WP_GRP_SIZE (should be 0x00)\n");
+
+			printf("\tWP_GRP_ENABLE: 0x%01x\n", wp_grp_enable);
+			if (wp_grp_enable != 0x00)
+				printf("Warn: Invalid WP_GRP_ENABLE (should be 0x00)\n");
+
+			printf("\tR2W_FACTOR: 0x%01x (Write %d times read)\n",
+			       r2w_factor, r2w_factor);
+			if (r2w_factor != 0x02)
+				printf("Warn: Invalid R2W_FACTOR (should be 0x02)\n");
+
+			printf("\tWRITE_BL_LEN: 0x%01x (", write_bl_len);
+			switch (write_bl_len) {
+			case 9:
+				printf("512 bytes)\n");
+				break;
+			case 10:
+				printf("1024 bytes)\n");
+				break;
+			case 11:
+				printf("2048 bytes)\n");
+				break;
+			default:
+				printf("reserved)\n");
+				break;
+			}
+
+			if (write_bl_len != 0x09)
+				printf("Warn: Invalid WRITE_BL_LEN (should be 0x09)\n");
+
+			printf("\tWRITE_BL_PARTIAL: 0x%01x\n", write_bl_partial);
+			if (write_bl_partial != 0x00)
+				printf("Warn: Invalid WRITE_BL_PARTIAL (should be 0x00)\n");
+
+			printf("\tFILE_FORMAT_GRP: 0x%01x\n", file_format_grp);
+			if (file_format_grp != 0x00)
+				printf("Warn: Invalid FILE_FORMAT_GRP (should be 0x00)\n");
+
+			printf("\tCOPY: 0x%01x\n", copy);
+			printf("\tPERM_WRITE_PROTECT: 0x%01x\n",
+			       perm_write_protect);
+			printf("\tTMP_WRITE_PROTECT: 0x%01x\n",
+			       tmp_write_protect);
+			printf("\tFILE_FORMAT: 0x%01x (",
+			       file_format);
+
+			if (file_format_grp == 1) {
+				printf("reserved)\n");
+			} else {
+				switch (file_format) {
+				case 0:
+					printf("partition table)\n");
+					break;
+				case 1:
+					printf("no partition table)\n");
+					break;
+				case 2:
+					printf("Universal File Format)\n");
+					break;
+				case 3:
+					printf("Others/unknown)\n");
+					break;
+				}
+			}
+
+			if (file_format != 0x00)
+				printf("Warn: Invalid FILE_FORMAT (should be 0x00)\n");
+
+			printf("\tCRC: 0x%01x\n", crc);
+
+			memory_capacity = (c_size + 1) * 512ull * 1024ull;
+			block_size = 512;
+			blocks = memory_capacity / block_size;
+		}
+
+		memory_capacity = blocks * block_size;
+
+		printf("\tCAPACITY: ");
+		if (memory_capacity / (1024ull * 1024ull * 1024ull) > 0)
+			printf("%.2fGbyte",
+			       memory_capacity / (1024.0 * 1024.0 * 1024.0));
+		else if (memory_capacity / (1024ull * 1024ull) > 0)
+			printf("%.2fMbyte", memory_capacity / (1024.0 * 1024.0));
+		else if (memory_capacity / (1024ull) > 0)
+			printf("%.2fKbyte", memory_capacity / (1024.0));
+		else
+			printf("%.2fbyte", memory_capacity * 1.0);
+
+		printf(" (%lld bytes, %lld sectors, %d bytes each)\n",
+		       memory_capacity, blocks, block_size);
+	} else {
+		unsigned long long blocks = 0;
+		int block_size = 0;
+		unsigned long long memory_capacity;
+
+		printf("card classes: ");
+		if (ccc & 0x800)
+			printf("11 extension, ");
+		if (ccc & 0x400)
+			printf("10 switch, ");
+		if (ccc & 0x200)
+			printf("9 I/O mode, ");
+		if (ccc & 0x100)
+			printf("8 application specific, ");
+		if (ccc & 0x080)
+			printf("7 lock card, ");
+		if (ccc & 0x040)
+			printf("6 write protection, ");
+		if (ccc & 0x020)
+			printf("5 erase, ");
+		if (ccc & 0x010)
+			printf("4 block write, ");
+		if (ccc & 0x008)
+			printf("3 reserved, ");
+		if (ccc & 0x004)
+			printf("2 block read, ");
+		if (ccc & 0x002)
+			printf("1 reserved, ");
+		if (ccc & 0x001)
+			printf("0 basic, ");
+		printf("\b\b\n");
+
+		if (csd_structure == 0) {
+			int mult;
+			int blocknr;
+			int block_len;
+
+			mult = 1 << (c_size_mult + 2);
+			blocknr = (c_size + 1) * mult;
+			block_len = 1 << read_bl_len;
+			blocks = blocknr;
+			block_size = block_len;
+		} else if (csd_structure == 1) {
+			memory_capacity = (c_size + 1) * 512ull * 1024ull;
+			block_size = 512;
+			blocks = memory_capacity / block_size;
+		}
+
+		memory_capacity = blocks * block_size;
+
+		printf("capacity: ");
+		if (memory_capacity / (1024ull * 1024ull * 1024ull) > 0)
+			printf("%.2fGbyte",
+			       memory_capacity / (1024.0 * 1024.0 * 1024.0));
+		else if (memory_capacity / (1024ull * 1024ull) > 0)
+			printf("%.2fMbyte", memory_capacity / (1024.0 * 1024.0));
+		else if (memory_capacity / (1024ull) > 0)
+			printf("%.2fKbyte", memory_capacity / (1024.0));
+		else
+			printf("%.2fbyte", memory_capacity * 1.0);
+
+		printf(" (%lld bytes, %lld sectors, %d bytes each)\n",
+		       memory_capacity, blocks, block_size);
+	}
+}
+
+void print_mmc_csd(struct config *config, char *csd)
+{
+	unsigned int csd_structure;
+	unsigned int spec_vers;
+	unsigned int taac_timevalue;
+	unsigned int taac_timeunit;
+	unsigned int nsac;
+	unsigned int tran_speed_timevalue;
+	unsigned int tran_speed_transferrateunit;
+	unsigned int ccc;
+	unsigned int read_bl_len;
+	unsigned int read_bl_partial;
+	unsigned int write_blk_misalign;
+	unsigned int read_blk_misalign;
+	unsigned int dsr_imp;
+	unsigned int c_size;
+	unsigned int vdd_r_curr_min;
+	unsigned int vdd_r_curr_max;
+	unsigned int vdd_w_curr_min;
+	unsigned int vdd_w_curr_max;
+	unsigned int c_size_mult;
+	unsigned int erase_grp_size;
+	unsigned int erase_grp_mult;
+	unsigned int wp_grp_size;
+	unsigned int wp_grp_enable;
+	unsigned int default_ecc;
+	unsigned int r2w_factor;
+	unsigned int write_bl_len;
+	unsigned int write_bl_partial;
+	unsigned int content_prot_app;
+	unsigned int file_format_grp;
+	unsigned int copy;
+	unsigned int perm_write_protect;
+	unsigned int tmp_write_protect;
+	unsigned int file_format;
+	unsigned int ecc;
+	unsigned int crc;
+	unsigned int taac;
+	unsigned int tran_speed;
+
+	parse_bin(csd, "2u4u2r1r4u3u8u1r4u3u12u4u1u1u1u1u2r12u3u3u3u3u3u"
+		  "5u5u5u1u2u3u4u1u4r1u1u1u1u1u2u2u7u1r",
+		  &csd_structure, &spec_vers, &taac_timevalue,
+		  &taac_timeunit, &nsac, &tran_speed_timevalue,
+		  &tran_speed_transferrateunit, &ccc, &read_bl_len,
+		  &read_bl_partial, &write_blk_misalign,
+		  &read_blk_misalign, &dsr_imp, &c_size,
+		  &vdd_r_curr_min, &vdd_r_curr_max,
+		  &vdd_w_curr_min, &vdd_w_curr_max, &c_size_mult,
+		  &erase_grp_size, &erase_grp_mult, &wp_grp_size,
+		  &wp_grp_enable, &default_ecc, &r2w_factor,
+		  &write_bl_len, &write_bl_partial, &content_prot_app,
+		  &file_format_grp, &copy, &perm_write_protect,
+		  &tmp_write_protect, &file_format, &ecc, &crc);
+
+	taac = taac_timevalue << 3 | taac_timeunit;
+	tran_speed = tran_speed_timevalue << 3 | tran_speed_transferrateunit;
+
+	if (config->verbose) {
+		float value;
+		int mult;
+		int blocknr;
+		int block_len;
+		unsigned long long blocks = 0;
+		int block_size = 0;
+		unsigned long long memory_capacity;
+
+		printf("======MMC/CSD======\n");
+
+		printf("\tCSD_STRUCTURE: 0x%01x (", csd_structure);
+		switch (csd_structure) {
+		case 0x0:
+			printf("v1.0)\n");
+			break;
+		case 0x1:
+			printf("v1.1)\n");
+			break;
+		case 0x2:
+			printf("v1.2)\n");
+			break;
+		case 0x3:
+			printf("version in ext_csd)\n");
+			break;
+		}
+
+		printf("\tSPEC_VERS: 0x%01x (", spec_vers);
+		switch (spec_vers) {
+		case 0x0:
+			printf("v1.0-v1.2)\n");
+			break;
+		case 0x1:
+			printf("v1.4)\n");
+			break;
+		case 0x2:
+			printf("v2.0-v2.2)\n");
+			break;
+		case 0x3:
+			printf("v3.1-v3.31)\n");
+			break;
+		case 0x4:
+			printf("v4.0-v4.3)\n");
+			break;
+		default:
+			printf("reserved)\n");
+			break;
+		}
+
+		printf("\tTAAC: 0x%02x (", taac);
+		switch (taac_timevalue) {
+		case 0x0:
+			value = 0.0f;
+			break;
+		case 0x1:
+			value = 1.0f;
+			break;
+		case 0x2:
+			value = 1.2f;
+			break;
+		case 0x3:
+			value = 1.3f;
+			break;
+		case 0x4:
+			value = 1.5f;
+			break;
+		case 0x5:
+			value = 2.0f;
+			break;
+		case 0x6:
+			value = 2.5f;
+			break;
+		case 0x7:
+			value = 3.0f;
+			break;
+		case 0x8:
+			value = 3.5f;
+			break;
+		case 0x9:
+			value = 4.0f;
+			break;
+		case 0xa:
+			value = 4.5f;
+			break;
+		case 0xb:
+			value = 5.0f;
+			break;
+		case 0xc:
+			value = 5.5f;
+			break;
+		case 0xd:
+			value = 6.0f;
+			break;
+		case 0xe:
+			value = 7.0f;
+			break;
+		case 0xf:
+			value = 8.0f;
+			break;
+		default:
+			value = 0.0f;
+			break;
+		}
+
+		switch (taac_timeunit) {
+		case 0x0:
+			printf("%.2fns)\n", value * 1.0f);
+			break;
+		case 0x1:
+			printf("%.2fns)\n", value * 10.0f);
+			break;
+		case 0x2:
+			printf("%.2fns)\n", value * 100.0f);
+			break;
+		case 0x3:
+			printf("%.2fus)\n", value * 1.0f);
+			break;
+		case 0x4:
+			printf("%.2fus)\n", value * 10.0f);
+			break;
+		case 0x5:
+			printf("%.2fus)\n", value * 100.0f);
+			break;
+		case 0x6:
+			printf("%.2fms)\n", value * 1.0f);
+			break;
+		case 0x7:
+			printf("%.2fms)\n", value * 10.0f);
+			break;
+		}
+
+		printf("\tNSAC: %d clocks\n", nsac);
+		printf("\tTRAN_SPEED: 0x%02x (", tran_speed);
+		switch (tran_speed_timevalue) {
+		case 0x0:
+			value = 0.0f;
+			break;
+		case 0x1:
+			value = 1.0f;
+			break;
+		case 0x2:
+			value = 1.2f;
+			break;
+		case 0x3:
+			value = 1.3f;
+			break;
+		case 0x4:
+			value = 1.5f;
+			break;
+		case 0x5:
+			value = 2.0f;
+			break;
+		case 0x6:
+			value = 2.6f;
+			break;
+		case 0x7:
+			value = 3.0f;
+			break;
+		case 0x8:
+			value = 3.5f;
+			break;
+		case 0x9:
+			value = 4.0f;
+			break;
+		case 0xa:
+			value = 4.5f;
+			break;
+		case 0xb:
+			value = 5.2f;
+			break;
+		case 0xc:
+			value = 5.5f;
+			break;
+		case 0xd:
+			value = 6.0f;
+			break;
+		case 0xe:
+			value = 7.0f;
+			break;
+		case 0xf:
+			value = 8.0f;
+			break;
+		default:
+			value = 0.0f;
+			break;
+		}
+
+		switch (tran_speed_transferrateunit) {
+		case 0x0:
+			printf("%.2fKHz/s)\n", value * 100.0f);
+			break;
+		case 0x1:
+			printf("%.2fMHz/s)\n", value * 1.0f);
+			break;
+		case 0x2:
+			printf("%.2fMHz/s)\n", value * 10.0f);
+			break;
+		case 0x3:
+			printf("%.2fMHz/s)\n", value * 100.0f);
+			break;
+		default:
+			printf("reserved)\n");
+			break;
+		}
+
+		printf("\tCCC: 0x%03x (class: ", ccc);
+		if (ccc & 0x800)
+			printf("11, ");
+		if (ccc & 0x400)
+			printf("10, ");
+		if (ccc & 0x200)
+			printf("9, ");
+		if (ccc & 0x100)
+			printf("8, ");
+		if (ccc & 0x080)
+			printf("7, ");
+		if (ccc & 0x040)
+			printf("6, ");
+		if (ccc & 0x020)
+			printf("5, ");
+		if (ccc & 0x010)
+			printf("4, ");
+		if (ccc & 0x008)
+			printf("3, ");
+		if (ccc & 0x004)
+			printf("2, ");
+		if (ccc & 0x002)
+			printf("1, ");
+		if (ccc & 0x001)
+			printf("0, ");
+		printf("  )\n");
+
+		printf("\tREAD_BL_LEN: 0x%01x (", read_bl_len);
+		switch (read_bl_len) {
+		case 0x0:
+			printf("1 byte)\n");
+			break;
+		case 0x1:
+			printf("2 byte)\n");
+			break;
+		case 0x2:
+			printf("4 byte)\n");
+			break;
+		case 0x3:
+			printf("8 byte)\n");
+			break;
+		case 0x4:
+			printf("16 byte)\n");
+			break;
+		case 0x5:
+			printf("32 byte)\n");
+			break;
+		case 0x6:
+			printf("64 byte)\n");
+			break;
+		case 0x7:
+			printf("128 byte)\n");
+			break;
+		case 0x8:
+			printf("256 byte)\n");
+			break;
+		case 0x9:
+			printf("512 bytes)\n");
+			break;
+		case 0xa:
+			printf("1024 bytes)\n");
+			break;
+		case 0xb:
+			printf("2048 bytes)\n");
+			break;
+		case 0xc:
+			printf("4096 bytes)\n");
+			break;
+		case 0xd:
+			printf("8192 bytes)\n");
+			break;
+		case 0xe:
+			printf("16K bytes)\n");
+			break;
+		default:
+			printf("reserved bytes)\n");
+			break;
+		}
+
+		printf("\tREAD_BL_PARTIAL: 0x%01x (", read_bl_partial);
+		switch (read_bl_partial) {
+		case 0x0:
+			printf("only 512 byte and READ_BL_LEN block size)\n");
+			break;
+		case 0x1:
+			printf("less than READ_BL_LEN block size can be used)\n");
+			break;
+		}
+
+		printf("\tWRITE_BLK_MISALIGN: 0x%01x (", write_blk_misalign);
+		switch (write_blk_misalign) {
+		case 0x0:
+			printf("writes across block boundaries are invalid)\n");
+			break;
+		case 0x1:
+			printf("writes across block boundaries are allowed)\n");
+			break;
+		}
+
+		printf("\tREAD_BLK_MISALIGN: 0x%01x (", read_blk_misalign);
+		switch (read_blk_misalign) {
+		case 0x0:
+			printf("reads across block boundaries are invalid)\n");
+			break;
+		case 0x1:
+			printf("reads across block boundaries are allowed)\n");
+			break;
+		}
+
+		printf("\tDSR_IMP: 0x%01x (", dsr_imp);
+		switch (dsr_imp) {
+		case 0x0:
+			printf("configurable driver stage not available)\n");
+			break;
+		case 0x1:
+			printf("configurable driver state available)\n");
+			break;
+		}
+
+		printf("\tC_SIZE: 0x%03x\n", c_size);
+		printf("\tVDD_R_CURR_MIN: 0x%01x (", vdd_r_curr_min);
+		switch (vdd_r_curr_min) {
+		case 0x0:
+			printf("0.5mA)\n");
+			break;
+		case 0x1:
+			printf("1mA)\n");
+			break;
+		case 0x2:
+			printf("5mA)\n");
+			break;
+		case 0x3:
+			printf("10mA)\n");
+			break;
+		case 0x4:
+			printf("25mA)\n");
+			break;
+		case 0x5:
+			printf("35mA)\n");
+			break;
+		case 0x6:
+			printf("60mA)\n");
+			break;
+		case 0x7:
+			printf("100mA)\n");
+			break;
+		}
+
+		printf("\tVDD_R_CURR_MAX: 0x%01x (", vdd_r_curr_max);
+		switch (vdd_r_curr_max) {
+		case 0x0:
+			printf("1mA)\n");
+			break;
+		case 0x1:
+			printf("5mA)\n");
+			break;
+		case 0x2:
+			printf("10mA)\n");
+			break;
+		case 0x3:
+			printf("25mA)\n");
+			break;
+		case 0x4:
+			printf("35mA)\n");
+			break;
+		case 0x5:
+			printf("45mA)\n");
+			break;
+		case 0x6:
+			printf("80mA)\n");
+			break;
+		case 0x7:
+			printf("200mA)\n");
+			break;
+		}
+
+		printf("\tVDD_W_CURR_MIN: 0x%01x (", vdd_w_curr_min);
+		switch (vdd_w_curr_min) {
+		case 0x0:
+			printf("0.5mA)\n");
+			break;
+		case 0x1:
+			printf("1mA)\n");
+			break;
+		case 0x2:
+			printf("5mA)\n");
+			break;
+		case 0x3:
+			printf("10mA)\n");
+			break;
+		case 0x4:
+			printf("25mA)\n");
+			break;
+		case 0x5:
+			printf("35mA)\n");
+			break;
+		case 0x6:
+			printf("60mA)\n");
+			break;
+		case 0x7:
+			printf("100mA)\n");
+			break;
+		}
+
+		printf("\tVDD_W_CURR_MAX: 0x%01x (", vdd_w_curr_max);
+		switch (vdd_w_curr_max) {
+		case 0x0:
+			printf("1mA)\n");
+			break;
+		case 0x1:
+			printf("5mA)\n");
+			break;
+		case 0x2:
+			printf("10mA)\n");
+			break;
+		case 0x3:
+			printf("25mA)\n");
+			break;
+		case 0x4:
+			printf("35mA)\n");
+			break;
+		case 0x5:
+			printf("45mA)\n");
+			break;
+		case 0x6:
+			printf("80mA)\n");
+			break;
+		case 0x7:
+			printf("200mA)\n");
+			break;
+		}
+
+		printf("\tC_SIZE_MULT: 0x%01x\n", c_size_mult);
+		printf("\tERASE_GRP_SIZE: 0x%02x\n", erase_grp_size);
+		printf("\tERASE_GRP_MULT: 0x%02x (%d write blocks/erase group)\n",
+		       erase_grp_mult, (erase_grp_size + 1) *
+		       (erase_grp_mult + 1));
+		printf("\tWP_GRP_SIZE: 0x%02x (%d blocks/write protect group)\n",
+		       wp_grp_size, wp_grp_size + 1);
+		printf("\tWP_GRP_ENABLE: 0x%01x\n", wp_grp_enable);
+
+		printf("\tDEFAULT_ECC: 0x%01x (", default_ecc);
+		switch (default_ecc) {
+		case 0:
+			printf("none)\n");
+			break;
+		case 1:
+			printf("BCH)\n");
+			break;
+		default:
+			printf("reserved)\n");
+			break;
+		}
+
+		printf("\tR2W_FACTOR: 0x%01x (Write %d times read)\n",
+		       r2w_factor, r2w_factor);
+
+		printf("\tWRITE_BL_LEN: 0x%01x (", write_bl_len);
+		switch (write_bl_len) {
+		case 0x0:
+			printf("1 byte)\n");
+			break;
+		case 0x1:
+			printf("2 byte)\n");
+			break;
+		case 0x2:
+			printf("4 byte)\n");
+			break;
+		case 0x3:
+			printf("8 byte)\n");
+			break;
+		case 0x4:
+			printf("16 byte)\n");
+			break;
+		case 0x5:
+			printf("32 byte)\n");
+			break;
+		case 0x6:
+			printf("64 byte)\n");
+			break;
+		case 0x7:
+			printf("128 byte)\n");
+			break;
+		case 0x8:
+			printf("256 byte)\n");
+			break;
+		case 0x9:
+			printf("512 bytes)\n");
+			break;
+		case 0xa:
+			printf("1024 bytes)\n");
+			break;
+		case 0xb:
+			printf("2048 bytes)\n");
+			break;
+		case 0xc:
+			printf("4096 bytes)\n");
+			break;
+		case 0xd:
+			printf("8192 bytes)\n");
+			break;
+		case 0xe:
+			printf("16K bytes)\n");
+			break;
+		default:
+			printf("reserved bytes)\n");
+			break;
+		}
+
+		printf("\tWRITE_BL_PARTIAL: 0x%01x (", write_bl_partial);
+		switch (write_bl_partial) {
+		case 0x0:
+			printf("only 512 byte and WRITE_BL_LEN block size)\n");
+			break;
+		case 0x1:
+			printf("less than WRITE_BL_LEN block size can be used)\n");
+			break;
+		}
+
+		printf("\tCONTENT_PROT_APP: 0x%01x\n", content_prot_app);
+		printf("\tFILE_FORMAT_GRP: 0x%01x\n", file_format_grp);
+		if (file_format_grp != 0)
+			printf("Warn: Invalid FILE_FORMAT_GRP\n");
+
+		printf("\tCOPY: 0x%01x\n", copy);
+		printf("\tPERM_WRITE_PROTECT: 0x%01x\n", perm_write_protect);
+		printf("\tTMP_WRITE_PROTECT: 0x%01x\n", tmp_write_protect);
+		printf("\tFILE_FORMAT: 0x%01x (", file_format);
+		if (file_format != 0)
+			printf("Warn: Invalid FILE_FORMAT\n");
+
+		if (file_format_grp == 1) {
+			printf("reserved)\n");
+		} else {
+			switch (file_format) {
+			case 0:
+				printf("partition table)\n");
+				break;
+			case 1:
+				printf("no partition table)\n");
+				break;
+			case 2:
+				printf("Universal File Format)\n");
+				break;
+			case 3:
+				printf("Others/unknown)\n");
+				break;
+			}
+		}
+
+		printf("\tECC: 0x%01x (", ecc);
+		switch (ecc) {
+		case 0:
+			printf("none)\n");
+			break;
+		case 1:
+			printf("BCH(542,512))\n");
+			break;
+		default:
+			printf("reserved)\n");
+			break;
+		}
+
+		printf("\tCRC: 0x%01x\n", crc);
+
+		mult = 1 << (c_size_mult + 2);
+		blocknr = (c_size + 1) * mult;
+		block_len = 1 << read_bl_len;
+		blocks = blocknr;
+		block_size = block_len;
+
+		memory_capacity = blocks * block_size;
+
+		printf("\tCAPACITY: ");
+		if (memory_capacity / (1024ull * 1024ull * 1024ull) > 0)
+			printf("%.2fGbyte",
+			       memory_capacity / (1024.0 * 1024.0 * 1024.0));
+		else if (memory_capacity / (1024ull * 1024ull) > 0)
+			printf("%.2fMbyte", memory_capacity / (1024.0 * 1024.0));
+		else if (memory_capacity / (1024ull) > 0)
+			printf("%.2fKbyte", memory_capacity / (1024.0));
+		else
+			printf("%.2fbyte", memory_capacity * 1.0);
+
+		printf(" (%lld bytes, %lld sectors, %d bytes each)\n",
+		       memory_capacity, blocks, block_size);
+	} else {
+		int mult;
+		int blocknr;
+		int block_len;
+		unsigned long long blocks = 0;
+		int block_size = 0;
+		unsigned long long memory_capacity;
+
+		printf("version: ");
+		switch (spec_vers) {
+		case 0x0:
+			printf("MMC v1.0-v1.2\n");
+			break;
+		case 0x1:
+			printf("MMC v1.4\n");
+			break;
+		case 0x2:
+			printf("MMC v2.0-v2.2\n");
+			break;
+		case 0x3:
+			printf("MMC v3.1-v3.31\n");
+			break;
+		case 0x4:
+			printf("MMC v4.0-v4.3\n");
+			break;
+		default:
+			printf("reserved\n");
+			break;
+		}
+
+		printf("card classes: ");
+		if (ccc & 0x800)
+			printf("11, ");
+		if (ccc & 0x400)
+			printf("10, ");
+		if (ccc & 0x200)
+			printf("9, ");
+		if (ccc & 0x100)
+			printf("8, ");
+		if (ccc & 0x080)
+			printf("7, ");
+		if (ccc & 0x040)
+			printf("6, ");
+		if (ccc & 0x020)
+			printf("5, ");
+		if (ccc & 0x010)
+			printf("4, ");
+		if (ccc & 0x008)
+			printf("3, ");
+		if (ccc & 0x004)
+			printf("2, ");
+		if (ccc & 0x002)
+			printf("1, ");
+		if (ccc & 0x001)
+			printf("0, ");
+		printf("\b\b\n");
+
+		mult = 1 << (c_size_mult + 2);
+		blocknr = (c_size + 1) * mult;
+		block_len = 1 << read_bl_len;
+		blocks = blocknr;
+		block_size = block_len;
+
+		memory_capacity = blocks * block_size;
+
+		printf("capacity: ");
+		if (memory_capacity / (1024ull * 1024ull * 1024ull) > 0)
+			printf("%.2fGbyte",
+			       memory_capacity / (1024.0 * 1024.0 * 1024.0));
+		else if (memory_capacity / (1024ull * 1024ull) > 0)
+			printf("%.2fMbyte", memory_capacity / (1024.0 * 1024.0));
+		else if (memory_capacity / (1024ull) > 0)
+			printf("%.2fKbyte", memory_capacity / (1024.0));
+		else
+			printf("%.2fbyte", memory_capacity * 1.0);
+		printf(" (%lld bytes, %lld sectors, %d bytes each)\n",
+		       memory_capacity, blocks, block_size);
+	}
+}
+
+char *speed_class_speed(unsigned char id, bool ddr)
+{
+	if (ddr) {
+		switch (id) {
+		case 0x00: return "<4.8MB/s";
+		case 0x08: return " 4.8MB/s";
+		case 0x0a: return " 6.0MB/s";
+		case 0x0f: return " 9.0MB/s";
+		case 0x14: return "12.0MB/s";
+		case 0x1e: return "18.0MB/s";
+		case 0x28: return "24.0MB/s";
+		case 0x32: return "30.0MB/s";
+		case 0x3c: return "36.0MB/s";
+		case 0x46: return "42.0MB/s";
+		case 0x50: return "48.0MB/s";
+		case 0x64: return "60.0MB/s";
+		case 0x78: return "72.0MB/s";
+		case 0x8c: return "84.0MB/s";
+		case 0xa0: return "96.0MB/s";
+		default: return "??.?MB/s";
+		}
+	} else {
+		switch (id) {
+		case 0x00: return "<2.4MB/s";
+		case 0x08: return " 2.4MB/s";
+		case 0x0a: return " 3.0MB/s";
+		case 0x0f: return " 4.5MB/s";
+		case 0x14: return " 6.0MB/s";
+		case 0x1e: return " 9.0MB/s";
+		case 0x28: return "12.0MB/s";
+		case 0x32: return "15.0MB/s";
+		case 0x3c: return "18.0MB/s";
+		case 0x46: return "21.0MB/s";
+		case 0x50: return "24.0MB/s";
+		case 0x64: return "30.0MB/s";
+		case 0x78: return "36.0MB/s";
+		case 0x8c: return "42.0MB/s";
+		case 0xa0: return "48.0MB/s";
+		default: return "??.?MB/s";
+		}
+	}
+}
+
+char speed_class_name(unsigned char id)
+{
+	switch (id) {
+	case 0x00: return '?';
+	case 0x08: return 'A';
+	case 0x0a: return 'B';
+	case 0x0f: return 'C';
+	case 0x14: return 'D';
+	case 0x1e: return 'E';
+	case 0x28: return 'F';
+	case 0x32: return 'G';
+	case 0x3c: return 'H';
+	case 0x46: return 'J';
+	case 0x50: return 'K';
+	case 0x64: return 'M';
+	case 0x78: return 'O';
+	case 0x8c: return 'R';
+	case 0xa0: return 'T';
+	default: return '?';
+	}
+}
+
+char *power_class_consumption(unsigned int id, bool volt360)
+{
+	if (volt360) {
+		switch (id) {
+		case 0x0: return "100-200mA";
+		case 0x1: return "120-220mA";
+		case 0x2: return "150-250mA";
+		case 0x3: return "180-280mA";
+		case 0x4: return "200-300mA";
+		case 0x5: return "220-320mA";
+		case 0x6: return "250-350mA";
+		case 0x7: return "300-400mA";
+		case 0x8: return "350-450mA";
+		case 0x9: return "400-500mA";
+		case 0xa: return "450-550mA";
+		default: return "reserved";
+		}
+	} else {
+		switch (id) {
+		case 0x0: return "65-130mA";
+		case 0x1: return "70-140mA";
+		case 0x2: return "80-160mA";
+		case 0x3: return "90-180mA";
+		case 0x4: return "100-200mA";
+		case 0x5: return "120-220mA";
+		case 0x6: return "140-240mA";
+		case 0x7: return "160-260mA";
+		case 0x8: return "180-280mA";
+		case 0x9: return "200-300mA";
+		case 0xa: return "250-350mA";
+		default: return "reserved";
+		}
+	}
+}
+
+char *sleep_consumption(unsigned int id)
+{
+	switch (id) {
+	case 0x00: return "not defined";
+	case 0x01: return "2uA";
+	case 0x02: return "4uA";
+	case 0x03: return "8uA";
+	case 0x04: return "16uA";
+	case 0x05: return "32uA";
+	case 0x06: return "64uA";
+	case 0x07: return "128uA";
+	case 0x08: return "0.256mA";
+	case 0x09: return "0.512mA";
+	case 0x0a: return "1.024mA";
+	case 0x0b: return "2.048mA";
+	case 0x0c: return "4.096mA";
+	case 0x0d: return "8.192mA";
+	default: return "reserved";
+	}
+}
+
+void print_sd_scr(struct config *config, char *scr)
+{
+	unsigned int scr_structure;
+	unsigned int sd_spec;
+	unsigned int data_stat_after_erase;
+	unsigned int sd_security;
+	unsigned int sd_bus_widths;
+	unsigned int sd_spec3;
+	unsigned int ex_security;
+	unsigned int cmd_support;
+
+	parse_bin(scr, "4u4u1u3u4u1u4u9r2u32r",
+		&scr_structure, &sd_spec, &data_stat_after_erase,
+		&sd_security, &sd_bus_widths, &sd_spec3,
+		&ex_security, &cmd_support);
+
+	if (config->verbose) {
+		printf("======SD/SCR======\n");
+
+		printf("\tSCR_STRUCTURE: 0x%01x (", scr_structure);
+		switch (scr_structure) {
+		case 0:
+			printf("SCR v1.0)\n");
+			break;
+		default:
+			printf("reserved)\n");
+			break;
+		}
+
+		printf("\tSD_SPEC: 0x%01x (", sd_spec);
+		switch (sd_spec) {
+		case 0:
+			printf("SD v1.0/1.01)\n");
+			break;
+		case 1:
+			printf("SD v1.10)\n");
+			break;
+		case 2:
+			printf("SD v2.00/v3.0x)\n");
+			break;
+		case 3:
+			printf("SD v4.00)\n");
+			break;
+		default:
+			printf("reserved)\n");
+			break;
+		}
+
+		printf("\tDATA_STAT_AFTER_ERASE: 0x%01x\n",
+		       data_stat_after_erase);
+
+		printf("\tSD_SECURITY: 0x%01x (", sd_security);
+		switch (sd_security) {
+		case 0:
+			printf("no security)\n");
+			break;
+		case 1:
+			printf("not used)\n");
+			break;
+		case 2:
+			printf("SDSC card/security v1.01)\n");
+			break;
+		case 3:
+			printf("SDHC card/security v2.00)\n");
+			break;
+		case 4:
+			printf("SDXC card/security v3.xx)\n");
+			break;
+		default:
+			printf("reserved)\n");
+			break;
+		}
+
+		printf("\tSD_BUS_WIDTHS: 0x%01x (", sd_bus_widths);
+		if (BITS(sd_bus_widths, 2, 2))
+			printf("4bit, ");
+		if (BITS(sd_bus_widths, 0, 0))
+			printf("1bit, ");
+		printf(" bus)\n");
+
+		printf("\tSD_SPEC3: 0x%01x (", sd_spec3);
+		if (sd_spec >= 2) {
+			switch (sd_spec3) {
+			case 0:
+				printf("SD v2.00)\n");
+				break;
+			case 1:
+				printf("SD v3.0x)\n");
+				break;
+			}
+		} else {
+			printf("SD 1.xx)\n");
+		}
+
+		printf("\tEX_SECURITY: 0x%01x\n", ex_security);
+
+		printf("\tCMD_SUPPORT: 0x%01x (", cmd_support);
+		if (BITS(cmd_support, 1, 1))
+			printf("CMD23 ");
+		if (BITS(cmd_support, 0, 0))
+			printf("CMD20 ");
+		printf(" )\n");
+	} else {
+		printf("version: ");
+		switch (sd_spec) {
+		case 0:
+			printf("SD 1.0/1.01\n");
+			break;
+		case 1:
+			printf("SD 1.10\n");
+			break;
+		case 2:
+			switch (sd_spec3) {
+			case 0:
+				printf("SD 2.00\n");
+				break;
+			case 1:
+				printf("SD 3.0x\n");
+				break;
+			default:
+				printf("unknown\n");
+				break;
+			}
+			break;
+		case 3:
+			printf("SD 4.00\n");
+			break;
+		default:
+			printf("unknown\n");
+			break;
+		}
+
+		printf("bus widths: ");
+		if (BITS(sd_bus_widths, 2, 2))
+			printf("4bit, ");
+		if (BITS(sd_bus_widths, 0, 0))
+			printf("1bit, ");
+		printf("\b\b\n");
+	}
+}
+
+/* MMC/SD interface processing functions */
+void print_info(struct config *config, char *type,
+	char *cid, char *csd, char *scr, char *ext_csd)
+{
+	printf("type: '%s'\n", type);
+
+	if (!strcmp(type, "SD") && cid)
+		print_sd_cid(config, cid);
+	else if (!strcmp(type, "MMC") && cid)
+		print_mmc_cid(config, cid);
+
+	if (!strcmp(type, "SD") && scr)
+		print_sd_scr(config, scr);
+
+	if (!strcmp(type, "MMC") && csd)
+		print_mmc_csd(config, csd);
+	else if (!strcmp(type, "SD") && csd)
+		print_sd_csd(config, csd);
+}
+
+int process_dir(struct config *config, enum REG_TYPE reg)
+{
+	char *type = NULL, *cid = NULL, *csd = NULL, *scr = NULL, *ext_csd = NULL;
+	int ret = 0;
+
+	if (chdir(config->dir) < 0) {
+		fprintf(stderr,
+			"MMC/SD information directory '%s' does not exist.\n",
+			config->dir);
+		return -1;
+	}
+
+	type = read_file("type");
+	if (!type) {
+		fprintf(stderr,
+			"Could not read card interface type in directory '%s'.\n",
+			config->dir);
+		return -1;
+	}
+
+	if (strcmp(type, "MMC") && strcmp(type, "SD")) {
+		fprintf(stderr, "Unknown type: '%s'\n", type);
+		ret = -1;
+		goto err;
+	}
+
+	switch (reg) {
+	case CID:
+		cid = read_file("cid");
+		if (!cid) {
+			fprintf(stderr,
+				"Could not read card identity in directory '%s'.\n",
+				config->dir);
+			ret = -1;
+			goto err;
+		}
+		break;
+	case CSD:
+		csd = read_file("csd");
+		if (!csd) {
+			fprintf(stderr,
+				"Could not read card specific data in "
+				"directory '%s'.\n", config->dir);
+			ret = -1;
+			goto err;
+		}
+		break;
+	case SCR:
+		if (!strcmp(type, "SD")) {
+			scr = read_file("scr");
+			if (!scr) {
+				fprintf(stderr, "Could not read SD card "
+					"configuration in directory '%s'.\n",
+					config->dir);
+				ret = -1;
+				goto err;
+			}
+		}
+		break;
+	case EXT_CSD:
+		if (!strcmp(type, "MMC")) {
+			ext_csd = read_file("ext_csd");
+			if (!ext_csd) {
+				fprintf(stderr, "Could not read extra specific "
+					"data in directory '%s'.\n",
+					config->dir);
+				ret = -1;
+				goto err;
+			}
+		}
+		break;
+	default:
+		goto err;
+	}
+
+	print_info(config, type, cid, csd, scr, ext_csd);
+
+err:
+	free(ext_csd);
+	free(scr);
+	free(csd);
+	free(cid);
+	free(type);
+
+	return ret;
+}
+
+int lsmmc_main(struct config *config, int argc, char **argv)
+{
+	int ret;
+
+	memset(config, 0, sizeof(*config));
+	config->mmc_ids = calloc(IDS_MAX, sizeof(char *));
+	config->sd_ids = calloc(IDS_MAX, sizeof(char *));
+	if (!config->mmc_ids || !config->sd_ids) {
+		fprintf(stderr, "Could not allocate memory for lsmmc.\n");
+		return -1;
+	}
+
+	ret = parse_opts(argc, argv, config);
+	if (ret)
+		return ret;
+
+	return parse_ids(config);
+}
+
+void lsmmc_free(struct config *config)
+{
+	free(config->mmc_ids);
+	free(config->sd_ids);
+	free(config->dir);
+}
+
+int do_read_csd(int argc, char **argv)
+{
+	struct config config;
+	int ret;
+
+	CHECK(argc != 2 && argc != 3, "Usage: Print CSD data from <device path>.\n",
+	      exit(1));
+
+	ret = lsmmc_main(&config, argc, argv);
+	if (ret)
+		goto out;
+
+	if (config.dir)
+		ret = process_dir(&config, CSD);
+
+out:
+	lsmmc_free(&config);
+
+	return ret;
+}
+
+int do_read_cid(int argc, char **argv)
+{
+	struct config config;
+	int ret;
+
+	CHECK(argc != 2 && argc != 3, "Usage: Print CID data from <device path>.\n",
+	      exit(1));
+
+	ret = lsmmc_main(&config, argc, argv);
+	if (ret)
+		goto out;
+
+	if (config.dir)
+		ret = process_dir(&config, CID);
+
+out:
+	lsmmc_free(&config);
+
+	return ret;
+}
+
+int do_read_scr(int argc, char **argv)
+{
+	struct config config;
+	int ret;
+
+	CHECK(argc != 2 && argc != 3, "Usage: Print SCR data from <device path>.\n",
+	      exit(1));
+
+	ret = lsmmc_main(&config, argc, argv);
+	if (ret)
+		goto out;
+
+	if (config.dir)
+		ret = process_dir(&config, SCR);
+
+out:
+	lsmmc_free(&config);
+
+	return ret;
+}
diff --git a/mmc.c b/mmc.c
index a13d9ae..ed5bbf5 100644
--- a/mmc.c
+++ b/mmc.c
@@ -175,6 +175,24 @@ static struct Command commands[] = {
 		"NOTE! The cache is an optional feature on devices >= eMMC4.5.",
 	  NULL
 	},
+	{ do_read_csd, -1,
+	  "csd read", "<device path>\n"
+		  "Print CSD data from <device path>.\n"
+		  "The device path should specify the csd file directory.",
+	  NULL
+	},
+	{ do_read_cid, -1,
+	  "cid read", "<device path>\n"
+		  "Print CID data from <device path>.\n"
+		  "The device path should specify the cid file directory.",
+	  NULL
+	},
+	{ do_read_scr, -1,
+	  "scr read", "<device path>\n"
+		  "Print SCR data from <device path>.\n"
+		  "The device path should specify the scr file directory.",
+	  NULL
+	},
 	{ 0, 0, 0, 0 }
 };
 
diff --git a/mmc_cmds.h b/mmc_cmds.h
index 75d8f8c..32a4001 100644
--- a/mmc_cmds.h
+++ b/mmc_cmds.h
@@ -36,3 +36,6 @@ int do_rpmb_read_block(int nargs, char **argv);
 int do_rpmb_write_block(int nargs, char **argv);
 int do_cache_en(int nargs, char **argv);
 int do_cache_dis(int nargs, char **argv);
+int do_read_scr(int argc, char **argv);
+int do_read_cid(int argc, char **argv);
+int do_read_csd(int argc, char **argv);