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>
diff --git a/common/cmd_host.c b/common/cmd_host.c
index d20f592..ba1460e 100644
--- a/common/cmd_host.c
+++ b/common/cmd_host.c
@@ -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[])
{
@@ -82,6 +84,46 @@
printf("%12lu %s\n", (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;
+ 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;
}
@@ -91,6 +133,7 @@
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 @@
"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"
);