// SPDX-License-Identifier: GPL-2.0+

  /*
   * Copyright (c) 2012, Google Inc.

   */
  
  #include <common.h>

  #include <dm.h>

  #include <fs.h>

  #include <part.h>
  #include <sandboxblockdev.h>

  #include <linux/errno.h>

  static int host_curr_device = -1;

  static int do_host_load(cmd_tbl_t *cmdtp, int flag, int argc,

  			   char * const argv[])
  {

  	return do_load(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);

  }

  static int do_host_ls(cmd_tbl_t *cmdtp, int flag, int argc,

  			   char * const argv[])
  {
  	return do_ls(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  }

  static int do_host_size(cmd_tbl_t *cmdtp, int flag, int argc,
  			   char * const argv[])
  {
  	return do_size(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  }

  static int do_host_save(cmd_tbl_t *cmdtp, int flag, int argc,

  			   char * const argv[])
  {

  	return do_save(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);

  }

  static int do_host_bind(cmd_tbl_t *cmdtp, int flag, int argc,

  			   char * const argv[])
  {
  	if (argc < 2 || argc > 3)
  		return CMD_RET_USAGE;
  	char *ep;
  	char *dev_str = argv[1];
  	char *file = argc >= 3 ? argv[2] : NULL;
  	int dev = simple_strtoul(dev_str, &ep, 16);
  	if (*ep) {
  		printf("** Bad device specification %s **
  ", dev_str);
  		return CMD_RET_USAGE;
  	}
  	return host_dev_bind(dev, file);
  }

  static int do_host_info(cmd_tbl_t *cmdtp, int flag, int argc,

  			   char * const argv[])
  {
  	if (argc < 1 || argc > 2)
  		return CMD_RET_USAGE;
  	int min_dev = 0;
  	int max_dev = CONFIG_HOST_MAX_DEVICES - 1;
  	if (argc >= 2) {
  		char *ep;
  		char *dev_str = argv[1];
  		int dev = simple_strtoul(dev_str, &ep, 16);
  		if (*ep) {
  			printf("** Bad device specification %s **
  ", dev_str);
  			return CMD_RET_USAGE;
  		}
  		min_dev = dev;
  		max_dev = dev;
  	}
  	int dev;
  	printf("%3s %12s %s
  ", "dev", "blocks", "path");
  	for (dev = min_dev; dev <= max_dev; dev++) {

  		struct blk_desc *blk_dev;

  		int ret;
  
  		printf("%3d ", dev);
  		ret = host_get_dev_err(dev, &blk_dev);
  		if (ret) {
  			if (ret == -ENOENT)
  				puts("Not bound to a backing file
  ");
  			else if (ret == -ENODEV)
  				puts("Invalid host device number
  ");
  
  			continue;
  		}

  		struct host_block_dev *host_dev;
  
  #ifdef CONFIG_BLK
  		host_dev = dev_get_priv(blk_dev->bdev);
  #else
  		host_dev = blk_dev->priv;
  #endif

  		printf("%12lu %s
  ", (unsigned long)blk_dev->lba,
  		       host_dev->filename);
  	}
  	return 0;
  }

  static int do_host_dev(cmd_tbl_t *cmdtp, int flag, int argc,
  		       char * const argv[])
  {
  	int dev;
  	char *ep;

  	struct blk_desc *blk_dev;

  	int ret;
  
  	if (argc < 1 || argc > 3)
  		return CMD_RET_USAGE;
  
  	if (argc == 1) {
  		if (host_curr_device < 0) {
  			printf("No current host device
  ");
  			return 1;
  		}
  		printf("Current host device %d
  ", host_curr_device);
  		return 0;
  	}
  
  	dev = simple_strtoul(argv[1], &ep, 16);
  	if (*ep) {
  		printf("** Bad device specification %s **
  ", argv[2]);
  		return CMD_RET_USAGE;
  	}
  
  	ret = host_get_dev_err(dev, &blk_dev);
  	if (ret) {
  		if (ret == -ENOENT)
  			puts("Not bound to a backing file
  ");
  		else if (ret == -ENODEV)
  			puts("Invalid host device number
  ");
  
  		return 1;
  	}
  
  	host_curr_device = dev;
  	return 0;
  }

  static cmd_tbl_t cmd_host_sub[] = {
  	U_BOOT_CMD_MKENT(load, 7, 0, do_host_load, "", ""),
  	U_BOOT_CMD_MKENT(ls, 3, 0, do_host_ls, "", ""),
  	U_BOOT_CMD_MKENT(save, 6, 0, do_host_save, "", ""),

  	U_BOOT_CMD_MKENT(size, 3, 0, do_host_size, "", ""),

  	U_BOOT_CMD_MKENT(bind, 3, 0, do_host_bind, "", ""),
  	U_BOOT_CMD_MKENT(info, 3, 0, do_host_info, "", ""),

  	U_BOOT_CMD_MKENT(dev, 0, 1, do_host_dev, "", ""),

  };

  static int do_host(cmd_tbl_t *cmdtp, int flag, int argc,

  		      char * const argv[])
  {
  	cmd_tbl_t *c;

  	/* Skip past 'host' */

  	argc--;
  	argv++;

  	c = find_cmd_tbl(argv[0], cmd_host_sub,
  			 ARRAY_SIZE(cmd_host_sub));

  
  	if (c)
  		return c->cmd(cmdtp, flag, argc, argv);
  	else
  		return CMD_RET_USAGE;
  }
  
  U_BOOT_CMD(

  	host, 8, 1, do_host,
  	"Miscellaneous host commands",

  	"load hostfs - <addr> <filename> [<bytes> <offset>]  - "

  		"load a file from host
  "

  	"host ls hostfs - <filename>                    - list files on host
  "
  	"host save hostfs - <addr> <filename> <bytes> [<offset>] - "

  		"save a file to host
  "

  	"host size hostfs - <filename> - determine size of file on host
  "

  	"host bind <dev> [<filename>] - bind \"host\" device to file
  "
  	"host info [<dev>]            - show device binding & info
  "

  	"host dev [<dev>] - Set or retrieve the current host device
  "

  	"host commands use the \"hostfs\" device. The \"host\" device is used
  "

  	"with standard IO commands such as fatls or ext2load"

  );