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sandbox: Implement host dev [device] 

A common pattern to check if a certain device exists (e.g. in
config_distro_bootcmd) is to use: <interface> dev [device]

Implement host dev [device] so this pattern can be used for sandbox host
devices.

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Sjoerd Simons 2015-04-13 22:54:23 +02:00 committed by Simon Glass
parent bacfb1df95
commit 9b97b6ba24
1 changed files with 44 additions and 0 deletions
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44
common/cmd_host.c
View File

@ -10,6 +10,8 @@
#include <sandboxblockdev.h>
#include <asm/errno.h>
static int host_curr_device = -1;
static int do_host_load(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
@ -85,12 +87,53 @@ static int do_host_info(cmd_tbl_t *cmdtp, int flag, int argc,
return 0;
}
static int do_host_dev(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
int dev;
char *ep;
block_dev_desc_t *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\n");
return 1;
}
printf("Current host device %d\n", host_curr_device);
return 0;
}
dev = simple_strtoul(argv[1], &ep, 16);
if (*ep) {
printf("** Bad device specification %s **\n", 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\n");
else if (ret == -ENODEV)
puts("Invalid host device number\n");
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(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,
@ -126,6 +169,7 @@ U_BOOT_CMD(
"save a file to host\n"
"host bind <dev> [<filename>] - bind \"host\" device to file\n"
"host info [<dev>] - show device binding & info\n"
"host dev [<dev>] - Set or retrieve the current host device\n"
"host commands use the \"hostfs\" device. The \"host\" device is used\n"
"with standard IO commands such as fatls or ext2load"
);