board/toradex/common/tdx-cfg-block.c - github/trini/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (c) 2016-2019 Toradex, Inc.
  */

 #include <common.h>
 #include "tdx-cfg-block.h"

 #if defined(CONFIG_TARGET_APALIS_IMX6) || \
 	defined(CONFIG_TARGET_APALIS_IMX8) || \
 	defined(CONFIG_TARGET_COLIBRI_IMX6) || \
 	defined(CONFIG_TARGET_COLIBRI_IMX8X)
 #include <asm/arch/sys_proto.h>
 #else
 #define is_cpu_type(cpu) (0)
 #endif
 #if defined(CONFIG_CPU_PXA27X)
 #include <asm/arch-pxa/pxa.h>
 #else
 #define cpu_is_pxa27x(cpu) (0)
 #endif
 #include <cli.h>
 #include <console.h>
 #include <flash.h>
 #include <malloc.h>
 #include <mmc.h>
 #include <nand.h>
 #include <asm/mach-types.h>

 DECLARE_GLOBAL_DATA_PTR;

 #define TAG_VALID	0xcf01
 #define TAG_MAC		0x0000
 #define TAG_HW		0x0008
 #define TAG_INVALID	0xffff

 #define TAG_FLAG_VALID	0x1

 #if defined(CONFIG_TDX_CFG_BLOCK_IS_IN_MMC)
 #define TDX_CFG_BLOCK_MAX_SIZE 512
 #elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NAND)
 #define TDX_CFG_BLOCK_MAX_SIZE 64
 #elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NOR)
 #define TDX_CFG_BLOCK_MAX_SIZE 64
 #else
 #error Toradex config block location not set
 #endif

 struct toradex_tag {
 	u32 len:14;
 	u32 flags:2;
 	u32 id:16;
 };

 bool valid_cfgblock;
 struct toradex_hw tdx_hw_tag;
 struct toradex_eth_addr tdx_eth_addr;
 u32 tdx_serial;

 const char * const toradex_modules[] = {
 	 [0] = "UNKNOWN MODULE",
 	 [1] = "Colibri PXA270 312MHz",
 	 [2] = "Colibri PXA270 520MHz",
 	 [3] = "Colibri PXA320 806MHz",
 	 [4] = "Colibri PXA300 208MHz",
 	 [5] = "Colibri PXA310 624MHz",
 	 [6] = "Colibri PXA320 806MHz IT",
 	 [7] = "Colibri PXA300 208MHz XT",
 	 [8] = "Colibri PXA270 312MHz",
 	 [9] = "Colibri PXA270 520MHz",
 	[10] = "Colibri VF50 128MB", /* not currently on sale */
 	[11] = "Colibri VF61 256MB",
 	[12] = "Colibri VF61 256MB IT",
 	[13] = "Colibri VF50 128MB IT",
 	[14] = "Colibri iMX6 Solo 256MB",
 	[15] = "Colibri iMX6 DualLite 512MB",
 	[16] = "Colibri iMX6 Solo 256MB IT",
 	[17] = "Colibri iMX6 DualLite 512MB IT",
 	[18] = "UNKNOWN MODULE",
 	[19] = "UNKNOWN MODULE",
 	[20] = "Colibri T20 256MB",
 	[21] = "Colibri T20 512MB",
 	[22] = "Colibri T20 512MB IT",
 	[23] = "Colibri T30 1GB",
 	[24] = "Colibri T20 256MB IT",
 	[25] = "Apalis T30 2GB",
 	[26] = "Apalis T30 1GB",
 	[27] = "Apalis iMX6 Quad 1GB",
 	[28] = "Apalis iMX6 Quad 2GB IT",
 	[29] = "Apalis iMX6 Dual 512MB",
 	[30] = "Colibri T30 1GB IT",
 	[31] = "Apalis T30 1GB IT",
 	[32] = "Colibri iMX7 Solo 256MB",
 	[33] = "Colibri iMX7 Dual 512MB",
 	[34] = "Apalis TK1 2GB",
 	[35] = "Apalis iMX6 Dual 1GB IT",
 	[36] = "Colibri iMX6ULL 256MB",
 	[37] = "Apalis iMX8 QuadMax 4GB Wi-Fi / BT IT",
 	[38] = "Colibri iMX8 QuadXPlus 2GB Wi-Fi / BT IT",
 	[39] = "Colibri iMX7 Dual 1GB (eMMC)",
 	[40] = "Colibri iMX6ULL 512MB Wi-Fi / BT IT",
 	[41] = "Colibri iMX7 Dual 512MB EPDC",
 	[42] = "Apalis TK1 4GB",
 	[43] = "Colibri T20 512MB IT SETEK",
 	[44] = "Colibri iMX6ULL 512MB IT",
 	[45] = "Colibri iMX6ULL 512MB Wi-Fi / Bluetooth",
 	[46] = "Apalis iMX8 QuadXPlus 2GB Wi-Fi / BT IT",
 	[47] = "Apalis iMX8 QuadMax 4GB IT",
 	[48] = "Apalis iMX8 QuadPlus 2GB Wi-Fi / BT",
 	[49] = "Apalis iMX8 QuadPlus 2GB",
 	[50] = "Colibri iMX8 QuadXPlus 2GB IT",
 	[51] = "Colibri iMX8 DualX 1GB Wi-Fi / Bluetooth",
 	[52] = "Colibri iMX8 DualX 1GB",
 };

 #ifdef CONFIG_TDX_CFG_BLOCK_IS_IN_MMC
 static int tdx_cfg_block_mmc_storage(u8 *config_block, int write)
 {
 	struct mmc *mmc;
 	int dev = CONFIG_TDX_CFG_BLOCK_DEV;
 	int offset = CONFIG_TDX_CFG_BLOCK_OFFSET;
 	uint part = CONFIG_TDX_CFG_BLOCK_PART;
 	uint blk_start;
 	int ret = 0;

 	/* Read production parameter config block from eMMC */
 	mmc = find_mmc_device(dev);
 	if (!mmc) {
 		puts("No MMC card found\n");
 		ret = -ENODEV;
 		goto out;
 	}
 	if (mmc_init(mmc)) {
 		puts("MMC init failed\n");
 		return -EINVAL;
 	}
 	if (part != mmc_get_blk_desc(mmc)->hwpart) {
 		if (blk_select_hwpart_devnum(IF_TYPE_MMC, dev, part)) {
 			puts("MMC partition switch failed\n");
 			ret = -ENODEV;
 			goto out;
 		}
 	}
 	if (offset < 0)
 		offset += mmc->capacity;
 	blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;

 	if (!write) {
 		/* Careful reads a whole block of 512 bytes into config_block */
 		if (blk_dread(mmc_get_blk_desc(mmc), blk_start, 1,
 			      (unsigned char *)config_block) != 1) {
 			ret = -EIO;
 			goto out;
 		}
 	} else {
 		/* Just writing one 512 byte block */
 		if (blk_dwrite(mmc_get_blk_desc(mmc), blk_start, 1,
 			       (unsigned char *)config_block) != 1) {
 			ret = -EIO;
 			goto out;
 		}
 	}

 out:
 	/* Switch back to regular eMMC user partition */
 	blk_select_hwpart_devnum(IF_TYPE_MMC, 0, 0);

 	return ret;
 }
 #endif

 #ifdef CONFIG_TDX_CFG_BLOCK_IS_IN_NAND
 static int read_tdx_cfg_block_from_nand(unsigned char *config_block)
 {
 	size_t size = TDX_CFG_BLOCK_MAX_SIZE;
 	struct mtd_info *mtd = get_nand_dev_by_index(0);

 	if (!mtd)
 		return -ENODEV;

 	/* Read production parameter config block from NAND page */
 	return nand_read_skip_bad(mtd, CONFIG_TDX_CFG_BLOCK_OFFSET,
 				  &size, NULL, TDX_CFG_BLOCK_MAX_SIZE,
 				  config_block);
 }

 static int write_tdx_cfg_block_to_nand(unsigned char *config_block)
 {
 	size_t size = TDX_CFG_BLOCK_MAX_SIZE;

 	/* Write production parameter config block to NAND page */
 	return nand_write_skip_bad(get_nand_dev_by_index(0),
 				   CONFIG_TDX_CFG_BLOCK_OFFSET,
 				   &size, NULL, TDX_CFG_BLOCK_MAX_SIZE,
 				   config_block, WITH_WR_VERIFY);
 }
 #endif

 #ifdef CONFIG_TDX_CFG_BLOCK_IS_IN_NOR
 static int read_tdx_cfg_block_from_nor(unsigned char *config_block)
 {
 	/* Read production parameter config block from NOR flash */
 	memcpy(config_block, (void *)CONFIG_TDX_CFG_BLOCK_OFFSET,
 	       TDX_CFG_BLOCK_MAX_SIZE);
 	return 0;
 }

 static int write_tdx_cfg_block_to_nor(unsigned char *config_block)
 {
 	/* Write production parameter config block to NOR flash */
 	return flash_write((void *)config_block, CONFIG_TDX_CFG_BLOCK_OFFSET,
 			   TDX_CFG_BLOCK_MAX_SIZE);
 }
 #endif

 int read_tdx_cfg_block(void)
 {
 	int ret = 0;
 	u8 *config_block = NULL;
 	struct toradex_tag *tag;
 	size_t size = TDX_CFG_BLOCK_MAX_SIZE;
 	int offset;

 	/* Allocate RAM area for config block */
 	config_block = memalign(ARCH_DMA_MINALIGN, size);
 	if (!config_block) {
 		printf("Not enough malloc space available!\n");
 		return -ENOMEM;
 	}

 	memset(config_block, 0, size);

 #if defined(CONFIG_TDX_CFG_BLOCK_IS_IN_MMC)
 	ret = tdx_cfg_block_mmc_storage(config_block, 0);
 #elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NAND)
 	ret = read_tdx_cfg_block_from_nand(config_block);
 #elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NOR)
 	ret = read_tdx_cfg_block_from_nor(config_block);
 #else
 	ret = -EINVAL;
 #endif
 	if (ret)
 		goto out;

 	/* Expect a valid tag first */
 	tag = (struct toradex_tag *)config_block;
 	if (tag->flags != TAG_FLAG_VALID || tag->id != TAG_VALID) {
 		valid_cfgblock = false;
 		ret = -EINVAL;
 		goto out;
 	}
 	valid_cfgblock = true;
 	offset = 4;

 	while (offset < TDX_CFG_BLOCK_MAX_SIZE) {
 		tag = (struct toradex_tag *)(config_block + offset);
 		offset += 4;
 		if (tag->id == TAG_INVALID)
 			break;

 		if (tag->flags == TAG_FLAG_VALID) {
 			switch (tag->id) {
 			case TAG_MAC:
 				memcpy(&tdx_eth_addr, config_block + offset,
 				       6);

 				/* NIC part of MAC address is serial number */
 				tdx_serial = ntohl(tdx_eth_addr.nic) >> 8;
 				break;
 			case TAG_HW:
 				memcpy(&tdx_hw_tag, config_block + offset, 8);
 				break;
 			}
 		}

 		/* Get to next tag according to current tags length */
 		offset += tag->len * 4;
 	}

 	/* Cap product id to avoid issues with a yet unknown one */
 	if (tdx_hw_tag.prodid >= (sizeof(toradex_modules) /
 				  sizeof(toradex_modules[0])))
 		tdx_hw_tag.prodid = 0;

 out:
 	free(config_block);
 	return ret;
 }

 static int get_cfgblock_interactive(void)
 {
 	char message[CONFIG_SYS_CBSIZE];
 	char *soc;
 	char it = 'n';
 	char wb = 'n';
 	int len;

 	/* Unknown module by default */
 	tdx_hw_tag.prodid = 0;

 	if (cpu_is_pxa27x())
 		sprintf(message, "Is the module the 312 MHz version? [y/N] ");
 	else
 		sprintf(message, "Is the module an IT version? [y/N] ");
 	len = cli_readline(message);
 	it = console_buffer[0];

 #if defined(CONFIG_TARGET_APALIS_IMX8) || \
 		defined(CONFIG_TARGET_COLIBRI_IMX6ULL) || \
 		defined(CONFIG_TARGET_COLIBRI_IMX8X)
 	sprintf(message, "Does the module have Wi-Fi / Bluetooth? [y/N] ");
 	len = cli_readline(message);
 	wb = console_buffer[0];
 #endif

 	soc = env_get("soc");
 	if (!strcmp("mx6", soc)) {
 #ifdef CONFIG_TARGET_APALIS_IMX6
 		if (it == 'y' || it == 'Y') {
 			if (is_cpu_type(MXC_CPU_MX6Q))
 				tdx_hw_tag.prodid = APALIS_IMX6Q_IT;
 			else
 				tdx_hw_tag.prodid = APALIS_IMX6D_IT;
 		} else {
 			if (is_cpu_type(MXC_CPU_MX6Q))
 				tdx_hw_tag.prodid = APALIS_IMX6Q;
 			else
 				tdx_hw_tag.prodid = APALIS_IMX6D;
 		}
 #elif CONFIG_TARGET_COLIBRI_IMX6
 		if (it == 'y' || it == 'Y') {
 			if (is_cpu_type(MXC_CPU_MX6DL))
 				tdx_hw_tag.prodid = COLIBRI_IMX6DL_IT;
 			else if (is_cpu_type(MXC_CPU_MX6SOLO))
 				tdx_hw_tag.prodid = COLIBRI_IMX6S_IT;
 		} else {
 			if (is_cpu_type(MXC_CPU_MX6DL))
 				tdx_hw_tag.prodid = COLIBRI_IMX6DL;
 			else if (is_cpu_type(MXC_CPU_MX6SOLO))
 				tdx_hw_tag.prodid = COLIBRI_IMX6S;
 		}
 #elif CONFIG_TARGET_COLIBRI_IMX6ULL
 		if (it == 'y' || it == 'Y') {
 			if (wb == 'y' || wb == 'Y')
 				tdx_hw_tag.prodid = COLIBRI_IMX6ULL_WIFI_BT_IT;
 			else
 				tdx_hw_tag.prodid = COLIBRI_IMX6ULL_IT;
 		} else {
 			if (wb == 'y' || wb == 'Y')
 				tdx_hw_tag.prodid = COLIBRI_IMX6ULL_WIFI_BT;
 			else
 				tdx_hw_tag.prodid = COLIBRI_IMX6ULL;
 		}
 #endif
 	} else if (!strcmp("imx7d", soc))
 		tdx_hw_tag.prodid = COLIBRI_IMX7D;
 	else if (!strcmp("imx7s", soc))
 		tdx_hw_tag.prodid = COLIBRI_IMX7S;
 	else if (is_cpu_type(MXC_CPU_IMX8QM)) {
 		if (it == 'y' || it == 'Y') {
 			if (wb == 'y' || wb == 'Y')
 				tdx_hw_tag.prodid = APALIS_IMX8QM_WIFI_BT_IT;
 			else
 				tdx_hw_tag.prodid = APALIS_IMX8QM_IT;
 		} else {
 			if (wb == 'y' || wb == 'Y')
 				tdx_hw_tag.prodid = APALIS_IMX8QP_WIFI_BT;
 			else
 				tdx_hw_tag.prodid = APALIS_IMX8QP;
 		}
 	} else if (is_cpu_type(MXC_CPU_IMX8QXP)) {
 		if (it == 'y' || it == 'Y') {
 			if (wb == 'y' || wb == 'Y')
 				tdx_hw_tag.prodid = COLIBRI_IMX8QXP_WIFI_BT_IT;
 			else
 				tdx_hw_tag.prodid = COLIBRI_IMX8QXP_IT;
 		} else {
 			if (wb == 'y' || wb == 'Y')
 				tdx_hw_tag.prodid = COLIBRI_IMX8DX_WIFI_BT;
 			else
 				tdx_hw_tag.prodid = COLIBRI_IMX8DX;
 		}
 	} else if (!strcmp("tegra20", soc)) {
 		if (it == 'y' || it == 'Y')
 			if (gd->ram_size == 0x10000000)
 				tdx_hw_tag.prodid = COLIBRI_T20_256MB_IT;
 			else
 				tdx_hw_tag.prodid = COLIBRI_T20_512MB_IT;
 		else
 			if (gd->ram_size == 0x10000000)
 				tdx_hw_tag.prodid = COLIBRI_T20_256MB;
 			else
 				tdx_hw_tag.prodid = COLIBRI_T20_512MB;
 	} else if (cpu_is_pxa27x()) {
 		if (it == 'y' || it == 'Y')
 			tdx_hw_tag.prodid = COLIBRI_PXA270_312MHZ;
 		else
 			tdx_hw_tag.prodid = COLIBRI_PXA270_520MHZ;
 	}
 #ifdef CONFIG_MACH_TYPE
 	else if (!strcmp("tegra30", soc)) {
 		if (CONFIG_MACH_TYPE == MACH_TYPE_APALIS_T30) {
 			if (it == 'y' || it == 'Y')
 				tdx_hw_tag.prodid = APALIS_T30_IT;
 			else
 				if (gd->ram_size == 0x40000000)
 					tdx_hw_tag.prodid = APALIS_T30_1GB;
 				else
 					tdx_hw_tag.prodid = APALIS_T30_2GB;
 		} else {
 			if (it == 'y' || it == 'Y')
 				tdx_hw_tag.prodid = COLIBRI_T30_IT;
 			else
 				tdx_hw_tag.prodid = COLIBRI_T30;
 		}
 	}
 #endif /* CONFIG_MACH_TYPE */
 	else if (!strcmp("tegra124", soc)) {
 		tdx_hw_tag.prodid = APALIS_TK1_2GB;
 	} else if (!strcmp("vf500", soc)) {
 		if (it == 'y' || it == 'Y')
 			tdx_hw_tag.prodid = COLIBRI_VF50_IT;
 		else
 			tdx_hw_tag.prodid = COLIBRI_VF50;
 	} else if (!strcmp("vf610", soc)) {
 		if (it == 'y' || it == 'Y')
 			tdx_hw_tag.prodid = COLIBRI_VF61_IT;
 		else
 			tdx_hw_tag.prodid = COLIBRI_VF61;
 	}

 	if (!tdx_hw_tag.prodid) {
 		printf("Module type not detectable due to unknown SoC\n");
 		return -1;
 	}

 	while (len < 4) {
 		sprintf(message, "Enter the module version (e.g. V1.1B): V");
 		len = cli_readline(message);
 	}

 	tdx_hw_tag.ver_major = console_buffer[0] - '0';
 	tdx_hw_tag.ver_minor = console_buffer[2] - '0';
 	tdx_hw_tag.ver_assembly = console_buffer[3] - 'A';

 	if (cpu_is_pxa27x() && tdx_hw_tag.ver_major == 1)
 		tdx_hw_tag.prodid -= (COLIBRI_PXA270_312MHZ -
 				       COLIBRI_PXA270_V1_312MHZ);

 	while (len < 8) {
 		sprintf(message, "Enter module serial number: ");
 		len = cli_readline(message);
 	}

 	tdx_serial = simple_strtoul(console_buffer, NULL, 10);

 	return 0;
 }

 static int get_cfgblock_barcode(char *barcode)
 {
 	if (strlen(barcode) < 16) {
 		printf("Argument too short, barcode is 16 chars long\n");
 		return -1;
 	}

 	/* Get hardware information from the first 8 digits */
 	tdx_hw_tag.ver_major = barcode[4] - '0';
 	tdx_hw_tag.ver_minor = barcode[5] - '0';
 	tdx_hw_tag.ver_assembly = barcode[7] - '0';

 	barcode[4] = '\0';
 	tdx_hw_tag.prodid = simple_strtoul(barcode, NULL, 10);

 	/* Parse second part of the barcode (serial number */
 	barcode += 8;
 	tdx_serial = simple_strtoul(barcode, NULL, 10);

 	return 0;
 }

 static int do_cfgblock_create(cmd_tbl_t *cmdtp, int flag, int argc,
 			      char * const argv[])
 {
 	u8 *config_block;
 	struct toradex_tag *tag;
 	size_t size = TDX_CFG_BLOCK_MAX_SIZE;
 	int offset = 0;
 	int ret = CMD_RET_SUCCESS;
 	int err;
 	int force_overwrite = 0;

 	/* Allocate RAM area for config block */
 	config_block = memalign(ARCH_DMA_MINALIGN, size);
 	if (!config_block) {
 		printf("Not enough malloc space available!\n");
 		return CMD_RET_FAILURE;
 	}

 	memset(config_block, 0xff, size);

 	if (argc >= 3) {
 		if (argv[2][0] == '-' && argv[2][1] == 'y')
 			force_overwrite = 1;
 	}

 	read_tdx_cfg_block();
 	if (valid_cfgblock) {
 #if defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NAND)
 		/*
 		 * On NAND devices, recreation is only allowed if the page is
 		 * empty (config block invalid...)
 		 */
 		printf("NAND erase block %d need to be erased before creating" \
 		       " a Toradex config block\n",
 		       CONFIG_TDX_CFG_BLOCK_OFFSET /
 		       get_nand_dev_by_index(0)->erasesize);
 		goto out;
 #elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NOR)
 		/*
 		 * On NOR devices, recreation is only allowed if the sector is
 		 * empty and write protection is off (config block invalid...)
 		 */
 		printf("NOR sector at offset 0x%02x need to be erased and " \
 		       "unprotected before creating a Toradex config block\n",
 		       CONFIG_TDX_CFG_BLOCK_OFFSET);
 		goto out;
 #else
 		if (!force_overwrite) {
 			char message[CONFIG_SYS_CBSIZE];

 			sprintf(message,
 				"A valid Toradex config block is present, still recreate? [y/N] ");

 			if (!cli_readline(message))
 				goto out;

 			if (console_buffer[0] != 'y' &&
 			    console_buffer[0] != 'Y')
 				goto out;
 		}
 #endif
 	}

 	/* Parse new Toradex config block data... */
 	if (argc < 3 || (force_overwrite && argc < 4)) {
 		err = get_cfgblock_interactive();
 	} else {
 		if (force_overwrite)
 			err = get_cfgblock_barcode(argv[3]);
 		else
 			err = get_cfgblock_barcode(argv[2]);
 	}
 	if (err) {
 		ret = CMD_RET_FAILURE;
 		goto out;
 	}

 	/* Convert serial number to MAC address (the storage format) */
 	tdx_eth_addr.oui = htonl(0x00142dUL << 8);
 	tdx_eth_addr.nic = htonl(tdx_serial << 8);

 	/* Valid Tag */
 	tag = (struct toradex_tag *)config_block;
 	tag->id = TAG_VALID;
 	tag->flags = TAG_FLAG_VALID;
 	tag->len = 0;
 	offset += 4;

 	/* Product Tag */
 	tag = (struct toradex_tag *)(config_block + offset);
 	tag->id = TAG_HW;
 	tag->flags = TAG_FLAG_VALID;
 	tag->len = 2;
 	offset += 4;

 	memcpy(config_block + offset, &tdx_hw_tag, 8);
 	offset += 8;

 	/* MAC Tag */
 	tag = (struct toradex_tag *)(config_block + offset);
 	tag->id = TAG_MAC;
 	tag->flags = TAG_FLAG_VALID;
 	tag->len = 2;
 	offset += 4;

 	memcpy(config_block + offset, &tdx_eth_addr, 6);
 	offset += 6;
 	memset(config_block + offset, 0, 32 - offset);

 #if defined(CONFIG_TDX_CFG_BLOCK_IS_IN_MMC)
 	err = tdx_cfg_block_mmc_storage(config_block, 1);
 #elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NAND)
 	err = write_tdx_cfg_block_to_nand(config_block);
 #elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NOR)
 	err = write_tdx_cfg_block_to_nor(config_block);
 #else
 	err = -EINVAL;
 #endif
 	if (err) {
 		printf("Failed to write Toradex config block: %d\n", ret);
 		ret = CMD_RET_FAILURE;
 		goto out;
 	}

 	printf("Toradex config block successfully written\n");

 out:
 	free(config_block);
 	return ret;
 }

 static int do_cfgblock(cmd_tbl_t *cmdtp, int flag, int argc,
 		       char * const argv[])
 {
 	int ret;

 	if (argc < 2)
 		return CMD_RET_USAGE;

 	if (!strcmp(argv[1], "create")) {
 		return do_cfgblock_create(cmdtp, flag, argc, argv);
 	} else if (!strcmp(argv[1], "reload")) {
 		ret = read_tdx_cfg_block();
 		if (ret) {
 			printf("Failed to reload Toradex config block: %d\n",
 			       ret);
 			return CMD_RET_FAILURE;
 		}
 		return CMD_RET_SUCCESS;
 	}

 	return CMD_RET_USAGE;
 }

 U_BOOT_CMD(
 	cfgblock, 4, 0, do_cfgblock,
 	"Toradex config block handling commands",
 	"create [-y] [barcode] - (Re-)create Toradex config block\n"
 	"cfgblock reload - Reload Toradex config block from flash"
 );
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright (c) 2016-2019 Toradex, Inc.
	*/

	#include <common.h>
	#include "tdx-cfg-block.h"

	#if defined(CONFIG_TARGET_APALIS_IMX6) \|\| \
	defined(CONFIG_TARGET_APALIS_IMX8) \|\| \
	defined(CONFIG_TARGET_COLIBRI_IMX6) \|\| \
	defined(CONFIG_TARGET_COLIBRI_IMX8X)
	#include <asm/arch/sys_proto.h>
	#else
	#define is_cpu_type(cpu) (0)
	#endif
	#if defined(CONFIG_CPU_PXA27X)
	#include <asm/arch-pxa/pxa.h>
	#else
	#define cpu_is_pxa27x(cpu) (0)
	#endif
	#include <cli.h>
	#include <console.h>
	#include <flash.h>
	#include <malloc.h>
	#include <mmc.h>
	#include <nand.h>
	#include <asm/mach-types.h>

	DECLARE_GLOBAL_DATA_PTR;

	#define TAG_VALID 0xcf01
	#define TAG_MAC 0x0000
	#define TAG_HW 0x0008
	#define TAG_INVALID 0xffff

	#define TAG_FLAG_VALID 0x1

	#if defined(CONFIG_TDX_CFG_BLOCK_IS_IN_MMC)
	#define TDX_CFG_BLOCK_MAX_SIZE 512
	#elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NAND)
	#define TDX_CFG_BLOCK_MAX_SIZE 64
	#elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NOR)
	#define TDX_CFG_BLOCK_MAX_SIZE 64
	#else
	#error Toradex config block location not set
	#endif

	struct toradex_tag {
	u32 len:14;
	u32 flags:2;
	u32 id:16;
	};

	bool valid_cfgblock;
	struct toradex_hw tdx_hw_tag;
	struct toradex_eth_addr tdx_eth_addr;
	u32 tdx_serial;

	const char * const toradex_modules[] = {
	[0] = "UNKNOWN MODULE",
	[1] = "Colibri PXA270 312MHz",
	[2] = "Colibri PXA270 520MHz",
	[3] = "Colibri PXA320 806MHz",
	[4] = "Colibri PXA300 208MHz",
	[5] = "Colibri PXA310 624MHz",
	[6] = "Colibri PXA320 806MHz IT",
	[7] = "Colibri PXA300 208MHz XT",
	[8] = "Colibri PXA270 312MHz",
	[9] = "Colibri PXA270 520MHz",
	[10] = "Colibri VF50 128MB", /* not currently on sale */
	[11] = "Colibri VF61 256MB",
	[12] = "Colibri VF61 256MB IT",
	[13] = "Colibri VF50 128MB IT",
	[14] = "Colibri iMX6 Solo 256MB",
	[15] = "Colibri iMX6 DualLite 512MB",
	[16] = "Colibri iMX6 Solo 256MB IT",
	[17] = "Colibri iMX6 DualLite 512MB IT",
	[18] = "UNKNOWN MODULE",
	[19] = "UNKNOWN MODULE",
	[20] = "Colibri T20 256MB",
	[21] = "Colibri T20 512MB",
	[22] = "Colibri T20 512MB IT",
	[23] = "Colibri T30 1GB",
	[24] = "Colibri T20 256MB IT",
	[25] = "Apalis T30 2GB",
	[26] = "Apalis T30 1GB",
	[27] = "Apalis iMX6 Quad 1GB",
	[28] = "Apalis iMX6 Quad 2GB IT",
	[29] = "Apalis iMX6 Dual 512MB",
	[30] = "Colibri T30 1GB IT",
	[31] = "Apalis T30 1GB IT",
	[32] = "Colibri iMX7 Solo 256MB",
	[33] = "Colibri iMX7 Dual 512MB",
	[34] = "Apalis TK1 2GB",
	[35] = "Apalis iMX6 Dual 1GB IT",
	[36] = "Colibri iMX6ULL 256MB",
	[37] = "Apalis iMX8 QuadMax 4GB Wi-Fi / BT IT",
	[38] = "Colibri iMX8 QuadXPlus 2GB Wi-Fi / BT IT",
	[39] = "Colibri iMX7 Dual 1GB (eMMC)",
	[40] = "Colibri iMX6ULL 512MB Wi-Fi / BT IT",
	[41] = "Colibri iMX7 Dual 512MB EPDC",
	[42] = "Apalis TK1 4GB",
	[43] = "Colibri T20 512MB IT SETEK",
	[44] = "Colibri iMX6ULL 512MB IT",
	[45] = "Colibri iMX6ULL 512MB Wi-Fi / Bluetooth",
	[46] = "Apalis iMX8 QuadXPlus 2GB Wi-Fi / BT IT",
	[47] = "Apalis iMX8 QuadMax 4GB IT",
	[48] = "Apalis iMX8 QuadPlus 2GB Wi-Fi / BT",
	[49] = "Apalis iMX8 QuadPlus 2GB",
	[50] = "Colibri iMX8 QuadXPlus 2GB IT",
	[51] = "Colibri iMX8 DualX 1GB Wi-Fi / Bluetooth",
	[52] = "Colibri iMX8 DualX 1GB",
	};

	#ifdef CONFIG_TDX_CFG_BLOCK_IS_IN_MMC
	static int tdx_cfg_block_mmc_storage(u8 *config_block, int write)
	{
	struct mmc *mmc;
	int dev = CONFIG_TDX_CFG_BLOCK_DEV;
	int offset = CONFIG_TDX_CFG_BLOCK_OFFSET;
	uint part = CONFIG_TDX_CFG_BLOCK_PART;
	uint blk_start;
	int ret = 0;

	/* Read production parameter config block from eMMC */
	mmc = find_mmc_device(dev);
	if (!mmc) {
	puts("No MMC card found\n");
	ret = -ENODEV;
	goto out;
	}
	if (mmc_init(mmc)) {
	puts("MMC init failed\n");
	return -EINVAL;
	}
	if (part != mmc_get_blk_desc(mmc)->hwpart) {
	if (blk_select_hwpart_devnum(IF_TYPE_MMC, dev, part)) {
	puts("MMC partition switch failed\n");
	ret = -ENODEV;
	goto out;
	}
	}
	if (offset < 0)
	offset += mmc->capacity;
	blk_start = ALIGN(offset, mmc->write_bl_len) / mmc->write_bl_len;

	if (!write) {
	/* Careful reads a whole block of 512 bytes into config_block */
	if (blk_dread(mmc_get_blk_desc(mmc), blk_start, 1,
	(unsigned char *)config_block) != 1) {
	ret = -EIO;
	goto out;
	}
	} else {
	/* Just writing one 512 byte block */
	if (blk_dwrite(mmc_get_blk_desc(mmc), blk_start, 1,
	(unsigned char *)config_block) != 1) {
	ret = -EIO;
	goto out;
	}
	}

	out:
	/* Switch back to regular eMMC user partition */
	blk_select_hwpart_devnum(IF_TYPE_MMC, 0, 0);

	return ret;
	}
	#endif

	#ifdef CONFIG_TDX_CFG_BLOCK_IS_IN_NAND
	static int read_tdx_cfg_block_from_nand(unsigned char *config_block)
	{
	size_t size = TDX_CFG_BLOCK_MAX_SIZE;
	struct mtd_info *mtd = get_nand_dev_by_index(0);

	if (!mtd)
	return -ENODEV;

	/* Read production parameter config block from NAND page */
	return nand_read_skip_bad(mtd, CONFIG_TDX_CFG_BLOCK_OFFSET,
	&size, NULL, TDX_CFG_BLOCK_MAX_SIZE,
	config_block);
	}

	static int write_tdx_cfg_block_to_nand(unsigned char *config_block)
	{
	size_t size = TDX_CFG_BLOCK_MAX_SIZE;

	/* Write production parameter config block to NAND page */
	return nand_write_skip_bad(get_nand_dev_by_index(0),
	CONFIG_TDX_CFG_BLOCK_OFFSET,
	&size, NULL, TDX_CFG_BLOCK_MAX_SIZE,
	config_block, WITH_WR_VERIFY);
	}
	#endif

	#ifdef CONFIG_TDX_CFG_BLOCK_IS_IN_NOR
	static int read_tdx_cfg_block_from_nor(unsigned char *config_block)
	{
	/* Read production parameter config block from NOR flash */
	memcpy(config_block, (void *)CONFIG_TDX_CFG_BLOCK_OFFSET,
	TDX_CFG_BLOCK_MAX_SIZE);
	return 0;
	}

	static int write_tdx_cfg_block_to_nor(unsigned char *config_block)
	{
	/* Write production parameter config block to NOR flash */
	return flash_write((void *)config_block, CONFIG_TDX_CFG_BLOCK_OFFSET,
	TDX_CFG_BLOCK_MAX_SIZE);
	}
	#endif

	int read_tdx_cfg_block(void)
	{
	int ret = 0;
	u8 *config_block = NULL;
	struct toradex_tag *tag;
	size_t size = TDX_CFG_BLOCK_MAX_SIZE;
	int offset;

	/* Allocate RAM area for config block */
	config_block = memalign(ARCH_DMA_MINALIGN, size);
	if (!config_block) {
	printf("Not enough malloc space available!\n");
	return -ENOMEM;
	}

	memset(config_block, 0, size);

	#if defined(CONFIG_TDX_CFG_BLOCK_IS_IN_MMC)
	ret = tdx_cfg_block_mmc_storage(config_block, 0);
	#elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NAND)
	ret = read_tdx_cfg_block_from_nand(config_block);
	#elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NOR)
	ret = read_tdx_cfg_block_from_nor(config_block);
	#else
	ret = -EINVAL;
	#endif
	if (ret)
	goto out;

	/* Expect a valid tag first */
	tag = (struct toradex_tag *)config_block;
	if (tag->flags != TAG_FLAG_VALID \|\| tag->id != TAG_VALID) {
	valid_cfgblock = false;
	ret = -EINVAL;
	goto out;
	}
	valid_cfgblock = true;
	offset = 4;

	while (offset < TDX_CFG_BLOCK_MAX_SIZE) {
	tag = (struct toradex_tag *)(config_block + offset);
	offset += 4;
	if (tag->id == TAG_INVALID)
	break;

	if (tag->flags == TAG_FLAG_VALID) {
	switch (tag->id) {
	case TAG_MAC:
	memcpy(&tdx_eth_addr, config_block + offset,
	6);

	/* NIC part of MAC address is serial number */
	tdx_serial = ntohl(tdx_eth_addr.nic) >> 8;
	break;
	case TAG_HW:
	memcpy(&tdx_hw_tag, config_block + offset, 8);
	break;
	}
	}

	/* Get to next tag according to current tags length */
	offset += tag->len * 4;
	}

	/* Cap product id to avoid issues with a yet unknown one */
	if (tdx_hw_tag.prodid >= (sizeof(toradex_modules) /
	sizeof(toradex_modules[0])))
	tdx_hw_tag.prodid = 0;

	out:
	free(config_block);
	return ret;
	}

	static int get_cfgblock_interactive(void)
	{
	char message[CONFIG_SYS_CBSIZE];
	char *soc;
	char it = 'n';
	char wb = 'n';
	int len;

	/* Unknown module by default */
	tdx_hw_tag.prodid = 0;

	if (cpu_is_pxa27x())
	sprintf(message, "Is the module the 312 MHz version? [y/N] ");
	else
	sprintf(message, "Is the module an IT version? [y/N] ");
	len = cli_readline(message);
	it = console_buffer[0];

	#if defined(CONFIG_TARGET_APALIS_IMX8) \|\| \
	defined(CONFIG_TARGET_COLIBRI_IMX6ULL) \|\| \
	defined(CONFIG_TARGET_COLIBRI_IMX8X)
	sprintf(message, "Does the module have Wi-Fi / Bluetooth? [y/N] ");
	len = cli_readline(message);
	wb = console_buffer[0];
	#endif

	soc = env_get("soc");
	if (!strcmp("mx6", soc)) {
	#ifdef CONFIG_TARGET_APALIS_IMX6
	if (it == 'y' \|\| it == 'Y') {
	if (is_cpu_type(MXC_CPU_MX6Q))
	tdx_hw_tag.prodid = APALIS_IMX6Q_IT;
	else
	tdx_hw_tag.prodid = APALIS_IMX6D_IT;
	} else {
	if (is_cpu_type(MXC_CPU_MX6Q))
	tdx_hw_tag.prodid = APALIS_IMX6Q;
	else
	tdx_hw_tag.prodid = APALIS_IMX6D;
	}
	#elif CONFIG_TARGET_COLIBRI_IMX6
	if (it == 'y' \|\| it == 'Y') {
	if (is_cpu_type(MXC_CPU_MX6DL))
	tdx_hw_tag.prodid = COLIBRI_IMX6DL_IT;
	else if (is_cpu_type(MXC_CPU_MX6SOLO))
	tdx_hw_tag.prodid = COLIBRI_IMX6S_IT;
	} else {
	if (is_cpu_type(MXC_CPU_MX6DL))
	tdx_hw_tag.prodid = COLIBRI_IMX6DL;
	else if (is_cpu_type(MXC_CPU_MX6SOLO))
	tdx_hw_tag.prodid = COLIBRI_IMX6S;
	}
	#elif CONFIG_TARGET_COLIBRI_IMX6ULL
	if (it == 'y' \|\| it == 'Y') {
	if (wb == 'y' \|\| wb == 'Y')
	tdx_hw_tag.prodid = COLIBRI_IMX6ULL_WIFI_BT_IT;
	else
	tdx_hw_tag.prodid = COLIBRI_IMX6ULL_IT;
	} else {
	if (wb == 'y' \|\| wb == 'Y')
	tdx_hw_tag.prodid = COLIBRI_IMX6ULL_WIFI_BT;
	else
	tdx_hw_tag.prodid = COLIBRI_IMX6ULL;
	}
	#endif
	} else if (!strcmp("imx7d", soc))
	tdx_hw_tag.prodid = COLIBRI_IMX7D;
	else if (!strcmp("imx7s", soc))
	tdx_hw_tag.prodid = COLIBRI_IMX7S;
	else if (is_cpu_type(MXC_CPU_IMX8QM)) {
	if (it == 'y' \|\| it == 'Y') {
	if (wb == 'y' \|\| wb == 'Y')
	tdx_hw_tag.prodid = APALIS_IMX8QM_WIFI_BT_IT;
	else
	tdx_hw_tag.prodid = APALIS_IMX8QM_IT;
	} else {
	if (wb == 'y' \|\| wb == 'Y')
	tdx_hw_tag.prodid = APALIS_IMX8QP_WIFI_BT;
	else
	tdx_hw_tag.prodid = APALIS_IMX8QP;
	}
	} else if (is_cpu_type(MXC_CPU_IMX8QXP)) {
	if (it == 'y' \|\| it == 'Y') {
	if (wb == 'y' \|\| wb == 'Y')
	tdx_hw_tag.prodid = COLIBRI_IMX8QXP_WIFI_BT_IT;
	else
	tdx_hw_tag.prodid = COLIBRI_IMX8QXP_IT;
	} else {
	if (wb == 'y' \|\| wb == 'Y')
	tdx_hw_tag.prodid = COLIBRI_IMX8DX_WIFI_BT;
	else
	tdx_hw_tag.prodid = COLIBRI_IMX8DX;
	}
	} else if (!strcmp("tegra20", soc)) {
	if (it == 'y' \|\| it == 'Y')
	if (gd->ram_size == 0x10000000)
	tdx_hw_tag.prodid = COLIBRI_T20_256MB_IT;
	else
	tdx_hw_tag.prodid = COLIBRI_T20_512MB_IT;
	else
	if (gd->ram_size == 0x10000000)
	tdx_hw_tag.prodid = COLIBRI_T20_256MB;
	else
	tdx_hw_tag.prodid = COLIBRI_T20_512MB;
	} else if (cpu_is_pxa27x()) {
	if (it == 'y' \|\| it == 'Y')
	tdx_hw_tag.prodid = COLIBRI_PXA270_312MHZ;
	else
	tdx_hw_tag.prodid = COLIBRI_PXA270_520MHZ;
	}
	#ifdef CONFIG_MACH_TYPE
	else if (!strcmp("tegra30", soc)) {
	if (CONFIG_MACH_TYPE == MACH_TYPE_APALIS_T30) {
	if (it == 'y' \|\| it == 'Y')
	tdx_hw_tag.prodid = APALIS_T30_IT;
	else
	if (gd->ram_size == 0x40000000)
	tdx_hw_tag.prodid = APALIS_T30_1GB;
	else
	tdx_hw_tag.prodid = APALIS_T30_2GB;
	} else {
	if (it == 'y' \|\| it == 'Y')
	tdx_hw_tag.prodid = COLIBRI_T30_IT;
	else
	tdx_hw_tag.prodid = COLIBRI_T30;
	}
	}
	#endif /* CONFIG_MACH_TYPE */
	else if (!strcmp("tegra124", soc)) {
	tdx_hw_tag.prodid = APALIS_TK1_2GB;
	} else if (!strcmp("vf500", soc)) {
	if (it == 'y' \|\| it == 'Y')
	tdx_hw_tag.prodid = COLIBRI_VF50_IT;
	else
	tdx_hw_tag.prodid = COLIBRI_VF50;
	} else if (!strcmp("vf610", soc)) {
	if (it == 'y' \|\| it == 'Y')
	tdx_hw_tag.prodid = COLIBRI_VF61_IT;
	else
	tdx_hw_tag.prodid = COLIBRI_VF61;
	}

	if (!tdx_hw_tag.prodid) {
	printf("Module type not detectable due to unknown SoC\n");
	return -1;
	}

	while (len < 4) {
	sprintf(message, "Enter the module version (e.g. V1.1B): V");
	len = cli_readline(message);
	}

	tdx_hw_tag.ver_major = console_buffer[0] - '0';
	tdx_hw_tag.ver_minor = console_buffer[2] - '0';
	tdx_hw_tag.ver_assembly = console_buffer[3] - 'A';

	if (cpu_is_pxa27x() && tdx_hw_tag.ver_major == 1)
	tdx_hw_tag.prodid -= (COLIBRI_PXA270_312MHZ -
	COLIBRI_PXA270_V1_312MHZ);

	while (len < 8) {
	sprintf(message, "Enter module serial number: ");
	len = cli_readline(message);
	}

	tdx_serial = simple_strtoul(console_buffer, NULL, 10);

	return 0;
	}

	static int get_cfgblock_barcode(char *barcode)
	{
	if (strlen(barcode) < 16) {
	printf("Argument too short, barcode is 16 chars long\n");
	return -1;
	}

	/* Get hardware information from the first 8 digits */
	tdx_hw_tag.ver_major = barcode[4] - '0';
	tdx_hw_tag.ver_minor = barcode[5] - '0';
	tdx_hw_tag.ver_assembly = barcode[7] - '0';

	barcode[4] = '\0';
	tdx_hw_tag.prodid = simple_strtoul(barcode, NULL, 10);

	/* Parse second part of the barcode (serial number */
	barcode += 8;
	tdx_serial = simple_strtoul(barcode, NULL, 10);

	return 0;
	}

	static int do_cfgblock_create(cmd_tbl_t *cmdtp, int flag, int argc,
	char * const argv[])
	{
	u8 *config_block;
	struct toradex_tag *tag;
	size_t size = TDX_CFG_BLOCK_MAX_SIZE;
	int offset = 0;
	int ret = CMD_RET_SUCCESS;
	int err;
	int force_overwrite = 0;

	/* Allocate RAM area for config block */
	config_block = memalign(ARCH_DMA_MINALIGN, size);
	if (!config_block) {
	printf("Not enough malloc space available!\n");
	return CMD_RET_FAILURE;
	}

	memset(config_block, 0xff, size);

	if (argc >= 3) {
	if (argv[2][0] == '-' && argv[2][1] == 'y')
	force_overwrite = 1;
	}

	read_tdx_cfg_block();
	if (valid_cfgblock) {
	#if defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NAND)
	/*
	* On NAND devices, recreation is only allowed if the page is
	* empty (config block invalid...)
	*/
	printf("NAND erase block %d need to be erased before creating" \
	" a Toradex config block\n",
	CONFIG_TDX_CFG_BLOCK_OFFSET /
	get_nand_dev_by_index(0)->erasesize);
	goto out;
	#elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NOR)
	/*
	* On NOR devices, recreation is only allowed if the sector is
	* empty and write protection is off (config block invalid...)
	*/
	printf("NOR sector at offset 0x%02x need to be erased and " \
	"unprotected before creating a Toradex config block\n",
	CONFIG_TDX_CFG_BLOCK_OFFSET);
	goto out;
	#else
	if (!force_overwrite) {
	char message[CONFIG_SYS_CBSIZE];

	sprintf(message,
	"A valid Toradex config block is present, still recreate? [y/N] ");

	if (!cli_readline(message))
	goto out;

	if (console_buffer[0] != 'y' &&
	console_buffer[0] != 'Y')
	goto out;
	}
	#endif
	}

	/* Parse new Toradex config block data... */
	if (argc < 3 \|\| (force_overwrite && argc < 4)) {
	err = get_cfgblock_interactive();
	} else {
	if (force_overwrite)
	err = get_cfgblock_barcode(argv[3]);
	else
	err = get_cfgblock_barcode(argv[2]);
	}
	if (err) {
	ret = CMD_RET_FAILURE;
	goto out;
	}

	/* Convert serial number to MAC address (the storage format) */
	tdx_eth_addr.oui = htonl(0x00142dUL << 8);
	tdx_eth_addr.nic = htonl(tdx_serial << 8);

	/* Valid Tag */
	tag = (struct toradex_tag *)config_block;
	tag->id = TAG_VALID;
	tag->flags = TAG_FLAG_VALID;
	tag->len = 0;
	offset += 4;

	/* Product Tag */
	tag = (struct toradex_tag *)(config_block + offset);
	tag->id = TAG_HW;
	tag->flags = TAG_FLAG_VALID;
	tag->len = 2;
	offset += 4;

	memcpy(config_block + offset, &tdx_hw_tag, 8);
	offset += 8;

	/* MAC Tag */
	tag = (struct toradex_tag *)(config_block + offset);
	tag->id = TAG_MAC;
	tag->flags = TAG_FLAG_VALID;
	tag->len = 2;
	offset += 4;

	memcpy(config_block + offset, &tdx_eth_addr, 6);
	offset += 6;
	memset(config_block + offset, 0, 32 - offset);

	#if defined(CONFIG_TDX_CFG_BLOCK_IS_IN_MMC)
	err = tdx_cfg_block_mmc_storage(config_block, 1);
	#elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NAND)
	err = write_tdx_cfg_block_to_nand(config_block);
	#elif defined(CONFIG_TDX_CFG_BLOCK_IS_IN_NOR)
	err = write_tdx_cfg_block_to_nor(config_block);
	#else
	err = -EINVAL;
	#endif
	if (err) {
	printf("Failed to write Toradex config block: %d\n", ret);
	ret = CMD_RET_FAILURE;
	goto out;
	}

	printf("Toradex config block successfully written\n");

	out:
	free(config_block);
	return ret;
	}

	static int do_cfgblock(cmd_tbl_t *cmdtp, int flag, int argc,
	char * const argv[])
	{
	int ret;

	if (argc < 2)
	return CMD_RET_USAGE;

	if (!strcmp(argv[1], "create")) {
	return do_cfgblock_create(cmdtp, flag, argc, argv);
	} else if (!strcmp(argv[1], "reload")) {
	ret = read_tdx_cfg_block();
	if (ret) {
	printf("Failed to reload Toradex config block: %d\n",
	ret);
	return CMD_RET_FAILURE;
	}
	return CMD_RET_SUCCESS;
	}

	return CMD_RET_USAGE;
	}

	U_BOOT_CMD(
	cfgblock, 4, 0, do_cfgblock,
	"Toradex config block handling commands",
	"create [-y] [barcode] - (Re-)create Toradex config block\n"
	"cfgblock reload - Reload Toradex config block from flash"
	);