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 <dm.h>
   9 #include <fs.h>
  10 #include <part.h>
  11 #include <sandboxblockdev.h>
  12 #include <asm/errno.h>
  13
  14 static int host_curr_device = -1;
  15
  16 static int do_host_load(cmd_tbl_t *cmdtp, int flag, int argc,
  17                            char * const argv[])
  18 {
  19         return do_load(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  20 }
  21
  22 static int do_host_ls(cmd_tbl_t *cmdtp, int flag, int argc,
  23                            char * const argv[])
  24 {
  25         return do_ls(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  26 }
  27
  28 static int do_host_save(cmd_tbl_t *cmdtp, int flag, int argc,
  29                            char * const argv[])
  30 {
  31         return do_save(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  32 }
  33
  34 static int do_host_bind(cmd_tbl_t *cmdtp, int flag, int argc,
  35                            char * const argv[])
  36 {
  37         if (argc < 2 || argc > 3)
  38                 return CMD_RET_USAGE;
  39         char *ep;
  40         char *dev_str = argv[1];
  41         char *file = argc >= 3 ? argv[2] : NULL;
  42         int dev = simple_strtoul(dev_str, &ep, 16);
  43         if (*ep) {
  44                 printf("** Bad device specification %s **\n", dev_str);
  45                 return CMD_RET_USAGE;
  46         }
  47         return host_dev_bind(dev, file);
  48 }
  49
  50 static int do_host_info(cmd_tbl_t *cmdtp, int flag, int argc,
  51                            char * const argv[])
  52 {
  53         if (argc < 1 || argc > 2)
  54                 return CMD_RET_USAGE;
  55         int min_dev = 0;
  56         int max_dev = CONFIG_HOST_MAX_DEVICES - 1;
  57         if (argc >= 2) {
  58                 char *ep;
  59                 char *dev_str = argv[1];
  60                 int dev = simple_strtoul(dev_str, &ep, 16);
  61                 if (*ep) {
  62                         printf("** Bad device specification %s **\n", dev_str);
  63                         return CMD_RET_USAGE;
  64                 }
  65                 min_dev = dev;
  66                 max_dev = dev;
  67         }
  68         int dev;
  69         printf("%3s %12s %s\n", "dev", "blocks", "path");
  70         for (dev = min_dev; dev <= max_dev; dev++) {
  71                 struct blk_desc *blk_dev;
  72                 int ret;
  73
  74                 printf("%3d ", dev);
  75                 ret = host_get_dev_err(dev, &blk_dev);
  76                 if (ret) {
  77                         if (ret == -ENOENT)
  78                                 puts("Not bound to a backing file\n");
  79                         else if (ret == -ENODEV)
  80                                 puts("Invalid host device number\n");
  81
  82                         continue;
  83                 }
  84                 struct host_block_dev *host_dev;
  85
  86 #ifdef CONFIG_BLK
  87                 host_dev = dev_get_priv(blk_dev->bdev);
  88 #else
  89                 host_dev = blk_dev->priv;
  90 #endif
  91                 printf("%12lu %s\n", (unsigned long)blk_dev->lba,
  92                        host_dev->filename);
  93         }
  94         return 0;
  95 }
  96
  97 static int do_host_dev(cmd_tbl_t *cmdtp, int flag, int argc,
  98                        char * const argv[])
  99 {
 100         int dev;
 101         char *ep;
 102         struct blk_desc *blk_dev;
 103         int ret;
 104
 105         if (argc < 1 || argc > 3)
 106                 return CMD_RET_USAGE;
 107
 108         if (argc == 1) {
 109                 if (host_curr_device < 0) {
 110                         printf("No current host device\n");
 111                         return 1;
 112                 }
 113                 printf("Current host device %d\n", host_curr_device);
 114                 return 0;
 115         }
 116
 117         dev = simple_strtoul(argv[1], &ep, 16);
 118         if (*ep) {
 119                 printf("** Bad device specification %s **\n", argv[2]);
 120                 return CMD_RET_USAGE;
 121         }
 122
 123         ret = host_get_dev_err(dev, &blk_dev);
 124         if (ret) {
 125                 if (ret == -ENOENT)
 126                         puts("Not bound to a backing file\n");
 127                 else if (ret == -ENODEV)
 128                         puts("Invalid host device number\n");
 129
 130                 return 1;
 131         }
 132
 133         host_curr_device = dev;
 134         return 0;
 135 }
 136
 137 static cmd_tbl_t cmd_host_sub[] = {
 138         U_BOOT_CMD_MKENT(load, 7, 0, do_host_load, "", ""),
 139         U_BOOT_CMD_MKENT(ls, 3, 0, do_host_ls, "", ""),
 140         U_BOOT_CMD_MKENT(save, 6, 0, do_host_save, "", ""),
 141         U_BOOT_CMD_MKENT(bind, 3, 0, do_host_bind, "", ""),
 142         U_BOOT_CMD_MKENT(info, 3, 0, do_host_info, "", ""),
 143         U_BOOT_CMD_MKENT(dev, 0, 1, do_host_dev, "", ""),
 144 };
 145
 146 static int do_host(cmd_tbl_t *cmdtp, int flag, int argc,
 147                       char * const argv[])
 148 {
 149         cmd_tbl_t *c;
 150
 151         /* Skip past 'host' */
 152         argc--;
 153         argv++;
 154
 155         c = find_cmd_tbl(argv[0], cmd_host_sub,
 156                          ARRAY_SIZE(cmd_host_sub));
 157
 158         if (c)
 159                 return c->cmd(cmdtp, flag, argc, argv);
 160         else
 161                 return CMD_RET_USAGE;
 162 }
 163
 164 U_BOOT_CMD(
 165         sb,     8,      1,      do_host,
 166         "Deprecated: use 'host' command instead.", ""
 167 );
 168
 169 U_BOOT_CMD(
 170         host, 8, 1, do_host,
 171         "Miscellaneous host commands",
 172         "load hostfs - <addr> <filename> [<bytes> <offset>]  - "
 173                 "load a file from host\n"
 174         "host ls hostfs - <filename>                    - list files on host\n"
 175         "host save hostfs - <addr> <filename> <bytes> [<offset>] - "
 176                 "save a file to host\n"
 177         "host bind <dev> [<filename>] - bind \"host\" device to file\n"
 178         "host info [<dev>]            - show device binding & info\n"
 179         "host dev [<dev>] - Set or retrieve the current host device\n"
 180         "host commands use the \"hostfs\" device. The \"host\" device is used\n"
 181         "with standard IO commands such as fatls or ext2load"
 182 );