/*
   * (C) Copyright 2001
   * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   *

   * SPDX-License-Identifier:	GPL-2.0+

   */
  
  #include <common.h>
  #include <command.h>
  #include <ide.h>

  #include <malloc.h>

  #include <part.h>

  
  #undef	PART_DEBUG
  
  #ifdef	PART_DEBUG
  #define	PRINTF(fmt,args...)	printf (fmt ,##args)
  #else
  #define PRINTF(fmt,args...)
  #endif

  struct block_drvr {
  	char *name;
  	block_dev_desc_t* (*get_dev)(int dev);
  };
  
  static const struct block_drvr block_drvr[] = {

  #if defined(CONFIG_CMD_IDE)

  	{ .name = "ide", .get_dev = ide_get_dev, },
  #endif

  #if defined(CONFIG_CMD_SATA)
  	{.name = "sata", .get_dev = sata_get_dev, },
  #endif

  #if defined(CONFIG_CMD_SCSI)

  	{ .name = "scsi", .get_dev = scsi_get_dev, },
  #endif

  #if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)

  	{ .name = "usb", .get_dev = usb_stor_get_dev, },
  #endif
  #if defined(CONFIG_MMC)
  	{ .name = "mmc", .get_dev = mmc_get_dev, },
  #endif
  #if defined(CONFIG_SYSTEMACE)
  	{ .name = "ace", .get_dev = systemace_get_dev, },
  #endif

  #if defined(CONFIG_SANDBOX)
  	{ .name = "host", .get_dev = host_get_dev, },
  #endif

  	{ },
  };

  DECLARE_GLOBAL_DATA_PTR;

  #ifdef HAVE_BLOCK_DEVICE

  block_dev_desc_t *get_dev(const char *ifname, int dev)

  {
  	const struct block_drvr *drvr = block_drvr;

  	block_dev_desc_t* (*reloc_get_dev)(int dev);

  	char *name;

  	if (!ifname)
  		return NULL;

  	name = drvr->name;

  #ifdef CONFIG_NEEDS_MANUAL_RELOC

  	name += gd->reloc_off;
  #endif

  	while (drvr->name) {

  		name = drvr->name;

  		reloc_get_dev = drvr->get_dev;

  #ifdef CONFIG_NEEDS_MANUAL_RELOC

  		name += gd->reloc_off;

  		reloc_get_dev += gd->reloc_off;
  #endif

  		if (strncmp(ifname, name, strlen(name)) == 0)

  			return reloc_get_dev(dev);

  		drvr++;
  	}
  	return NULL;
  }
  #else

  block_dev_desc_t *get_dev(const char *ifname, int dev)

  {
  	return NULL;
  }
  #endif

  #ifdef HAVE_BLOCK_DEVICE

  /* ------------------------------------------------------------------------- */
  /*
   * reports device info to the user
   */

  #ifdef CONFIG_LBA48

  typedef uint64_t lba512_t;

  #else

  typedef lbaint_t lba512_t;

  #endif

  /*
   * Overflowless variant of (block_count * mul_by / div_by)
   * when div_by > mul_by
   */
  static lba512_t lba512_muldiv (lba512_t block_count, lba512_t mul_by, lba512_t div_by)
  {
  	lba512_t bc_quot, bc_rem;
  
  	/* x * m / d == x / d * m + (x % d) * m / d */
  	bc_quot = block_count / div_by;
  	bc_rem  = block_count - div_by * bc_quot;
  	return bc_quot * mul_by + (bc_rem * mul_by) / div_by;
  }
  
  void dev_print (block_dev_desc_t *dev_desc)
  {
  	lba512_t lba512; /* number of blocks if 512bytes block size */

  	if (dev_desc->type == DEV_TYPE_UNKNOWN) {
  		puts ("not available
  ");
  		return;
  	}

  	switch (dev_desc->if_type) {

  	case IF_TYPE_SCSI:
  		printf ("(%d:%d) Vendor: %s Prod.: %s Rev: %s
  ",
  			dev_desc->target,dev_desc->lun,

  			dev_desc->vendor,

  			dev_desc->product,
  			dev_desc->revision);
  		break;

  	case IF_TYPE_ATAPI:

  	case IF_TYPE_IDE:
  	case IF_TYPE_SATA:

  		printf ("Model: %s Firm: %s Ser#: %s
  ",
  			dev_desc->vendor,
  			dev_desc->revision,
  			dev_desc->product);

  		break;

  	case IF_TYPE_SD:
  	case IF_TYPE_MMC:

  	case IF_TYPE_USB:
  		printf ("Vendor: %s Rev: %s Prod: %s
  ",
  			dev_desc->vendor,
  			dev_desc->revision,
  			dev_desc->product);
  		break;

  	case IF_TYPE_DOC:
  		puts("device type DOC
  ");
  		return;

  	case IF_TYPE_UNKNOWN:

  		puts("device type unknown
  ");
  		return;

  	default:

  		printf("Unhandled device type: %i
  ", dev_desc->if_type);

  		return;

  	}
  	puts ("            Type: ");
  	if (dev_desc->removable)
  		puts ("Removable ");
  	switch (dev_desc->type & 0x1F) {

  	case DEV_TYPE_HARDDISK:
  		puts ("Hard Disk");
  		break;
  	case DEV_TYPE_CDROM:
  		puts ("CD ROM");
  		break;
  	case DEV_TYPE_OPDISK:
  		puts ("Optical Device");
  		break;
  	case DEV_TYPE_TAPE:
  		puts ("Tape");
  		break;
  	default:
  		printf ("# %02X #", dev_desc->type & 0x1F);
  		break;

  	}
  	puts ("
  ");

  	if (dev_desc->lba > 0L && dev_desc->blksz > 0L) {

  		ulong mb, mb_quot, mb_rem, gb, gb_quot, gb_rem;

  		lbaint_t lba;

  
  		lba = dev_desc->lba;

  		lba512 = (lba * (dev_desc->blksz/512));

  		/* round to 1 digit */

  		mb = lba512_muldiv(lba512, 10, 2048);	/* 2048 = (1024 * 1024) / 512 MB */

  		mb_quot	= mb / 10;
  		mb_rem	= mb - (10 * mb_quot);
  
  		gb = mb / 1024;
  		gb_quot	= gb / 10;
  		gb_rem	= gb - (10 * gb_quot);

  #ifdef CONFIG_LBA48

  		if (dev_desc->lba48)

  			printf ("            Supports 48-bit addressing
  ");
  #endif

  #if defined(CONFIG_SYS_64BIT_LBA)

  		printf ("            Capacity: %ld.%ld MB = %ld.%ld GB (%Ld x %ld)
  ",

  			mb_quot, mb_rem,
  			gb_quot, gb_rem,
  			lba,
  			dev_desc->blksz);
  #else

  		printf ("            Capacity: %ld.%ld MB = %ld.%ld GB (%ld x %ld)
  ",
  			mb_quot, mb_rem,
  			gb_quot, gb_rem,

  			(ulong)lba,

  			dev_desc->blksz);

  #endif

  	} else {
  		puts ("            Capacity: not available
  ");
  	}
  }

  #endif

  #ifdef HAVE_BLOCK_DEVICE

  
  void init_part (block_dev_desc_t * dev_desc)
  {
  #ifdef CONFIG_ISO_PARTITION
  	if (test_part_iso(dev_desc) == 0) {
  		dev_desc->part_type = PART_TYPE_ISO;
  		return;
  	}
  #endif
  
  #ifdef CONFIG_MAC_PARTITION
  	if (test_part_mac(dev_desc) == 0) {
  		dev_desc->part_type = PART_TYPE_MAC;
  		return;
  	}
  #endif

  /* must be placed before DOS partition detection */
  #ifdef CONFIG_EFI_PARTITION
  	if (test_part_efi(dev_desc) == 0) {
  		dev_desc->part_type = PART_TYPE_EFI;
  		return;
  	}
  #endif

  #ifdef CONFIG_DOS_PARTITION
  	if (test_part_dos(dev_desc) == 0) {
  		dev_desc->part_type = PART_TYPE_DOS;
  		return;
  	}
  #endif

  
  #ifdef CONFIG_AMIGA_PARTITION
  	if (test_part_amiga(dev_desc) == 0) {
  	    dev_desc->part_type = PART_TYPE_AMIGA;
  	    return;
  	}
  #endif

  	dev_desc->part_type = PART_TYPE_UNKNOWN;

  }

  #if defined(CONFIG_MAC_PARTITION) || \
  	defined(CONFIG_DOS_PARTITION) || \
  	defined(CONFIG_ISO_PARTITION) || \
  	defined(CONFIG_AMIGA_PARTITION) || \
  	defined(CONFIG_EFI_PARTITION)

  static void print_part_header (const char *type, block_dev_desc_t * dev_desc)
  {
  	puts ("
  Partition Map for ");
  	switch (dev_desc->if_type) {

  	case IF_TYPE_IDE:
  		puts ("IDE");
  		break;
  	case IF_TYPE_SATA:
  		puts ("SATA");
  		break;
  	case IF_TYPE_SCSI:
  		puts ("SCSI");
  		break;
  	case IF_TYPE_ATAPI:
  		puts ("ATAPI");
  		break;
  	case IF_TYPE_USB:
  		puts ("USB");
  		break;
  	case IF_TYPE_DOC:
  		puts ("DOC");
  		break;

  	case IF_TYPE_MMC:
  		puts ("MMC");
  		break;

  	case IF_TYPE_HOST:
  		puts("HOST");
  		break;

  	default:
  		puts ("UNKNOWN");
  		break;

  	}
  	printf (" device %d  --   Partition Type: %s
  
  ",
  			dev_desc->dev, type);
  }

  #endif /* any CONFIG_..._PARTITION */

  void print_part (block_dev_desc_t * dev_desc)
  {
  
  		switch (dev_desc->part_type) {
  #ifdef CONFIG_MAC_PARTITION
  	case PART_TYPE_MAC:
  		PRINTF ("## Testing for valid MAC partition ##
  ");
  		print_part_header ("MAC", dev_desc);
  		print_part_mac (dev_desc);
  		return;
  #endif
  #ifdef CONFIG_DOS_PARTITION
  	case PART_TYPE_DOS:
  		PRINTF ("## Testing for valid DOS partition ##
  ");
  		print_part_header ("DOS", dev_desc);
  		print_part_dos (dev_desc);
  		return;
  #endif
  
  #ifdef CONFIG_ISO_PARTITION
  	case PART_TYPE_ISO:
  		PRINTF ("## Testing for valid ISO Boot partition ##
  ");
  		print_part_header ("ISO", dev_desc);
  		print_part_iso (dev_desc);
  		return;
  #endif

  
  #ifdef CONFIG_AMIGA_PARTITION
  	case PART_TYPE_AMIGA:
  	    PRINTF ("## Testing for a valid Amiga partition ##
  ");
  	    print_part_header ("AMIGA", dev_desc);
  	    print_part_amiga (dev_desc);
  	    return;
  #endif

  
  #ifdef CONFIG_EFI_PARTITION
  	case PART_TYPE_EFI:
  		PRINTF ("## Testing for valid EFI partition ##
  ");
  		print_part_header ("EFI", dev_desc);
  		print_part_efi (dev_desc);
  		return;
  #endif

  	}
  	puts ("## Unknown partition table
  ");
  }

  #endif /* HAVE_BLOCK_DEVICE */

  
  int get_partition_info(block_dev_desc_t *dev_desc, int part
  					, disk_partition_t *info)
  {

  #ifdef HAVE_BLOCK_DEVICE

  #ifdef CONFIG_PARTITION_UUIDS
  	/* The common case is no UUID support */
  	info->uuid[0] = 0;
  #endif

  	switch (dev_desc->part_type) {
  #ifdef CONFIG_MAC_PARTITION
  	case PART_TYPE_MAC:
  		if (get_partition_info_mac(dev_desc, part, info) == 0) {
  			PRINTF("## Valid MAC partition found ##
  ");
  			return 0;
  		}
  		break;
  #endif
  
  #ifdef CONFIG_DOS_PARTITION
  	case PART_TYPE_DOS:
  		if (get_partition_info_dos(dev_desc, part, info) == 0) {
  			PRINTF("## Valid DOS partition found ##
  ");
  			return 0;
  		}
  		break;
  #endif
  
  #ifdef CONFIG_ISO_PARTITION
  	case PART_TYPE_ISO:
  		if (get_partition_info_iso(dev_desc, part, info) == 0) {
  			PRINTF("## Valid ISO boot partition found ##
  ");
  			return 0;
  		}
  		break;
  #endif
  
  #ifdef CONFIG_AMIGA_PARTITION
  	case PART_TYPE_AMIGA:
  		if (get_partition_info_amiga(dev_desc, part, info) == 0) {
  			PRINTF("## Valid Amiga partition found ##
  ");
  			return 0;
  		}
  		break;
  #endif
  
  #ifdef CONFIG_EFI_PARTITION
  	case PART_TYPE_EFI:
  		if (get_partition_info_efi(dev_desc, part, info) == 0) {
  			PRINTF("## Valid EFI partition found ##
  ");
  			return 0;
  		}
  		break;
  #endif
  	default:
  		break;
  	}

  #endif /* HAVE_BLOCK_DEVICE */

  
  	return -1;
  }

  int get_device(const char *ifname, const char *dev_str,
  	       block_dev_desc_t **dev_desc)
  {
  	char *ep;
  	int dev;
  
  	dev = simple_strtoul(dev_str, &ep, 16);
  	if (*ep) {
  		printf("** Bad device specification %s %s **
  ",
  		       ifname, dev_str);
  		return -1;
  	}
  
  	*dev_desc = get_dev(ifname, dev);
  	if (!(*dev_desc) || ((*dev_desc)->type == DEV_TYPE_UNKNOWN)) {
  		printf("** Bad device %s %s **
  ", ifname, dev_str);
  		return -1;
  	}
  
  	return dev;
  }

  #define PART_UNSPECIFIED -2
  #define PART_AUTO -1
  #define MAX_SEARCH_PARTITIONS 16
  int get_device_and_partition(const char *ifname, const char *dev_part_str,

  			     block_dev_desc_t **dev_desc,

  			     disk_partition_t *info, int allow_whole_dev)

  {

  	int ret = -1;
  	const char *part_str;
  	char *dup_str = NULL;
  	const char *dev_str;

  	int dev;

  	char *ep;
  	int p;
  	int part;
  	disk_partition_t tmpinfo;

  	/*
  	 * For now, we have a special case for sandbox, since there is no
  	 * real block device support.
  	 */
  	if (0 == strcmp(ifname, "host")) {
  		*dev_desc = NULL;
  		info->start = info->size =  info->blksz = 0;
  		info->bootable = 0;
  		strcpy((char *)info->type, BOOT_PART_TYPE);
  		strcpy((char *)info->name, "Sandbox host");
  #ifdef CONFIG_PARTITION_UUIDS
  		info->uuid[0] = 0;
  #endif
  
  		return 0;
  	}

  	/* If no dev_part_str, use bootdevice environment variable */

  	if (!dev_part_str || !strlen(dev_part_str) ||
  	    !strcmp(dev_part_str, "-"))

  		dev_part_str = getenv("bootdevice");
  
  	/* If still no dev_part_str, it's an error */
  	if (!dev_part_str) {
  		printf("** No device specified **
  ");
  		goto cleanup;
  	}
  
  	/* Separate device and partition ID specification */
  	part_str = strchr(dev_part_str, ':');
  	if (part_str) {
  		dup_str = strdup(dev_part_str);
  		dup_str[part_str - dev_part_str] = 0;
  		dev_str = dup_str;
  		part_str++;
  	} else {
  		dev_str = dev_part_str;

  	}

  	/* Look up the device */
  	dev = get_device(ifname, dev_str, dev_desc);
  	if (dev < 0)
  		goto cleanup;
  
  	/* Convert partition ID string to number */
  	if (!part_str || !*part_str) {
  		part = PART_UNSPECIFIED;
  	} else if (!strcmp(part_str, "auto")) {
  		part = PART_AUTO;
  	} else {
  		/* Something specified -> use exactly that */
  		part = (int)simple_strtoul(part_str, &ep, 16);
  		/*
  		 * Less than whole string converted,
  		 * or request for whole device, but caller requires partition.
  		 */
  		if (*ep || (part == 0 && !allow_whole_dev)) {
  			printf("** Bad partition specification %s %s **
  ",
  			    ifname, dev_part_str);
  			goto cleanup;
  		}
  	}
  
  	/*
  	 * No partition table on device,
  	 * or user requested partition 0 (entire device).
  	 */
  	if (((*dev_desc)->part_type == PART_TYPE_UNKNOWN) ||
  	    (part == 0)) {
  		if (!(*dev_desc)->lba) {
  			printf("** Bad device size - %s %s **
  ", ifname,
  			       dev_str);
  			goto cleanup;
  		}

  		/*
  		 * If user specified a partition ID other than 0,
  		 * or the calling command only accepts partitions,
  		 * it's an error.
  		 */
  		if ((part > 0) || (!allow_whole_dev)) {
  			printf("** No partition table - %s %s **
  ", ifname,
  			       dev_str);
  			goto cleanup;

  		}

  		(*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);

  		info->start = 0;

  		info->size = (*dev_desc)->lba;
  		info->blksz = (*dev_desc)->blksz;
  		info->bootable = 0;

  		strcpy((char *)info->type, BOOT_PART_TYPE);
  		strcpy((char *)info->name, "Whole Disk");

  #ifdef CONFIG_PARTITION_UUIDS
  		info->uuid[0] = 0;
  #endif

  		ret = 0;
  		goto cleanup;

  	}

  	/*
  	 * Now there's known to be a partition table,
  	 * not specifying a partition means to pick partition 1.
  	 */
  	if (part == PART_UNSPECIFIED)
  		part = 1;
  
  	/*
  	 * If user didn't specify a partition number, or did specify something
  	 * other than "auto", use that partition number directly.
  	 */
  	if (part != PART_AUTO) {
  		ret = get_partition_info(*dev_desc, part, info);
  		if (ret) {
  			printf("** Invalid partition %d **
  ", part);
  			goto cleanup;
  		}
  	} else {
  		/*
  		 * Find the first bootable partition.
  		 * If none are bootable, fall back to the first valid partition.
  		 */
  		part = 0;
  		for (p = 1; p <= MAX_SEARCH_PARTITIONS; p++) {
  			ret = get_partition_info(*dev_desc, p, info);
  			if (ret)
  				continue;
  
  			/*
  			 * First valid partition, or new better partition?
  			 * If so, save partition ID.
  			 */
  			if (!part || info->bootable)
  				part = p;
  
  			/* Best possible partition? Stop searching. */
  			if (info->bootable)
  				break;
  
  			/*
  			 * We now need to search further for best possible.
  			 * If we what we just queried was the best so far,
  			 * save the info since we over-write it next loop.
  			 */
  			if (part == p)
  				tmpinfo = *info;
  		}
  		/* If we found any acceptable partition */
  		if (part) {
  			/*
  			 * If we searched all possible partition IDs,
  			 * return the first valid partition we found.
  			 */
  			if (p == MAX_SEARCH_PARTITIONS + 1)
  				*info = tmpinfo;

  		} else {
  			printf("** No valid partitions found **
  ");

  			ret = -1;

  			goto cleanup;
  		}

  	}
  	if (strncmp((char *)info->type, BOOT_PART_TYPE, sizeof(info->type)) != 0) {
  		printf("** Invalid partition type \"%.32s\""
  			" (expect \"" BOOT_PART_TYPE "\")
  ",
  			info->type);

  		ret  = -1;
  		goto cleanup;

  	}

  	(*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);

  	ret = part;
  	goto cleanup;

  cleanup:
  	free(dup_str);
  	return ret;

  }