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bootstd: Add the concept of a bootdev hunter

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Some bootdevs must be enumerated before they appear. For example, USB
bootdevs are not visible until USB is enumerated.

With standard boot this needs to happen automatically, since we only
want to enumerate a bus if it is needed.

Add a way to define bootdev 'hunters' which can be used to hunt for
bootdevs of a given type. Track which ones have been used and add a
command to list them.

Include a clang work-around which seems to be needed.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2023-01-17 10:47:33 -07:00 • committed by Tom Rini
parent 3722cc973f
commit bd90b09288
5 changed files with 176 additions and 3 deletions
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35
cmd/bootdev.c
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@ -107,14 +107,43 @@ static int do_bootdev_info(struct cmd_tbl *cmdtp, int flag, int argc,
return 0;
}
static int do_bootdev_hunt(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct bootstd_priv *priv;
const char *spec = NULL;
bool list = false;
int ret = 0;
if (argc >= 2) {
if (!strcmp(argv[1], "-l"))
list = true;
else
spec = argv[1];
}
ret = bootstd_get_priv(&priv);
if (ret)
return ret;
if (list) {
bootdev_list_hunters(priv);
} else {
/* TODO: implement hunting */
}
return 0;
}
#ifdef CONFIG_SYS_LONGHELP
static char bootdev_help_text[] =
"list [-p] - list all available bootdevs (-p to probe)\n"
"bootdev select <bd> - select a bootdev by name | label | seq\n"
"bootdev info [-p] - show information about a bootdev (-p to probe)";
"list [-p] - list all available bootdevs (-p to probe)\n"
"bootdev hunt [-l|<spec>] - use hunt drivers to find bootdevs\n"
"bootdev select <bd> - select a bootdev by name | label | seq\n"
"bootdev info [-p] - show information about a bootdev (-p to probe)";
#endif
U_BOOT_CMD_WITH_SUBCMDS(bootdev, "Boot devices", bootdev_help_text,
U_BOOT_SUBCMD_MKENT(list, 2, 1, do_bootdev_list),
U_BOOT_SUBCMD_MKENT(hunt, 2, 1, do_bootdev_hunt),
U_BOOT_SUBCMD_MKENT(select, 2, 1, do_bootdev_select),
U_BOOT_SUBCMD_MKENT(info, 2, 1, do_bootdev_info));