common/cmd_host.c

   1 /*
   2  * Copyright (c) 2012, Google Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <fs.h>
   9 #include <part.h>
  10 #include <sandboxblockdev.h>
  11 #include <asm/errno.h>
  12
  13 static int host_curr_device = -1;
  14
  15 static int do_host_load(cmd_tbl_t *cmdtp, int flag, int argc,
  16                            char * const argv[])
  17 {
  18         return do_load(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  19 }
  20
  21 static int do_host_ls(cmd_tbl_t *cmdtp, int flag, int argc,
  22                            char * const argv[])
  23 {
  24         return do_ls(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  25 }
  26
  27 static int do_host_save(cmd_tbl_t *cmdtp, int flag, int argc,
  28                            char * const argv[])
  29 {
  30         return do_save(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  31 }
  32
  33 static int do_host_bind(cmd_tbl_t *cmdtp, int flag, int argc,
  34                            char * const argv[])
  35 {
  36         if (argc < 2 || argc > 3)
  37                 return CMD_RET_USAGE;
  38         char *ep;
  39         char *dev_str = argv[1];
  40         char *file = argc >= 3 ? argv[2] : NULL;
  41         int dev = simple_strtoul(dev_str, &ep, 16);
  42         if (*ep) {
  43                 printf("** Bad device specification %s **\n", dev_str);
  44                 return CMD_RET_USAGE;
  45         }
  46         return host_dev_bind(dev, file);
  47 }
  48
  49 static int do_host_info(cmd_tbl_t *cmdtp, int flag, int argc,
  50                            char * const argv[])
  51 {
  52         if (argc < 1 || argc > 2)
  53                 return CMD_RET_USAGE;
  54         int min_dev = 0;
  55         int max_dev = CONFIG_HOST_MAX_DEVICES - 1;
  56         if (argc >= 2) {
  57                 char *ep;
  58                 char *dev_str = argv[1];
  59                 int dev = simple_strtoul(dev_str, &ep, 16);
  60                 if (*ep) {
  61                         printf("** Bad device specification %s **\n", dev_str);
  62                         return CMD_RET_USAGE;
  63                 }
  64                 min_dev = dev;
  65                 max_dev = dev;
  66         }
  67         int dev;
  68         printf("%3s %12s %s\n", "dev", "blocks", "path");
  69         for (dev = min_dev; dev <= max_dev; dev++) {
  70                 block_dev_desc_t *blk_dev;
  71                 int ret;
  72
  73                 printf("%3d ", dev);
  74                 ret = host_get_dev_err(dev, &blk_dev);
  75                 if (ret) {
  76                         if (ret == -ENOENT)
  77                                 puts("Not bound to a backing file\n");
  78                         else if (ret == -ENODEV)
  79                                 puts("Invalid host device number\n");
  80
  81                         continue;
  82                 }
  83                 struct host_block_dev *host_dev = blk_dev->priv;
  84                 printf("%12lu %s\n", (unsigned long)blk_dev->lba,
  85                        host_dev->filename);
  86         }
  87         return 0;
  88 }
  89
  90 static int do_host_dev(cmd_tbl_t *cmdtp, int flag, int argc,
  91                        char * const argv[])
  92 {
  93         int dev;
  94         char *ep;
  95         block_dev_desc_t *blk_dev;
  96         int ret;
  97
  98         if (argc < 1 || argc > 3)
  99                 return CMD_RET_USAGE;
 100
 101         if (argc == 1) {
 102                 if (host_curr_device < 0) {
 103                         printf("No current host device\n");
 104                         return 1;
 105                 }
 106                 printf("Current host device %d\n", host_curr_device);
 107                 return 0;
 108         }
 109
 110         dev = simple_strtoul(argv[1], &ep, 16);
 111         if (*ep) {
 112                 printf("** Bad device specification %s **\n", argv[2]);
 113                 return CMD_RET_USAGE;
 114         }
 115
 116         ret = host_get_dev_err(dev, &blk_dev);
 117         if (ret) {
 118                 if (ret == -ENOENT)
 119                         puts("Not bound to a backing file\n");
 120                 else if (ret == -ENODEV)
 121                         puts("Invalid host device number\n");
 122
 123                 return 1;
 124         }
 125
 126         host_curr_device = dev;
 127         return 0;
 128 }
 129
 130 static cmd_tbl_t cmd_host_sub[] = {
 131         U_BOOT_CMD_MKENT(load, 7, 0, do_host_load, "", ""),
 132         U_BOOT_CMD_MKENT(ls, 3, 0, do_host_ls, "", ""),
 133         U_BOOT_CMD_MKENT(save, 6, 0, do_host_save, "", ""),
 134         U_BOOT_CMD_MKENT(bind, 3, 0, do_host_bind, "", ""),
 135         U_BOOT_CMD_MKENT(info, 3, 0, do_host_info, "", ""),
 136         U_BOOT_CMD_MKENT(dev, 0, 1, do_host_dev, "", ""),
 137 };
 138
 139 static int do_host(cmd_tbl_t *cmdtp, int flag, int argc,
 140                       char * const argv[])
 141 {
 142         cmd_tbl_t *c;
 143
 144         /* Skip past 'host' */
 145         argc--;
 146         argv++;
 147
 148         c = find_cmd_tbl(argv[0], cmd_host_sub,
 149                          ARRAY_SIZE(cmd_host_sub));
 150
 151         if (c)
 152                 return c->cmd(cmdtp, flag, argc, argv);
 153         else
 154                 return CMD_RET_USAGE;
 155 }
 156
 157 U_BOOT_CMD(
 158         sb,     8,      1,      do_host,
 159         "Deprecated: use 'host' command instead.", ""
 160 );
 161
 162 U_BOOT_CMD(
 163         host, 8, 1, do_host,
 164         "Miscellaneous host commands",
 165         "load hostfs - <addr> <filename> [<bytes> <offset>]  - "
 166                 "load a file from host\n"
 167         "host ls hostfs - <filename>                    - list files on host\n"
 168         "host save hostfs - <addr> <filename> <bytes> [<offset>] - "
 169                 "save a file to host\n"
 170         "host bind <dev> [<filename>] - bind \"host\" device to file\n"
 171         "host info [<dev>]            - show device binding & info\n"
 172         "host dev [<dev>] - Set or retrieve the current host device\n"
 173         "host commands use the \"hostfs\" device. The \"host\" device is used\n"
 174         "with standard IO commands such as fatls or ext2load"
 175 );