xref: /third_party/alsa-utils/alsactl/init_ucm.c

/*
 *  Advanced Linux Sound Architecture Control Program - UCM Initialization
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include "aconfig.h"
#include <stddef.h>
#include "alsactl.h"

#ifdef HAVE_ALSA_USE_CASE_H

#include <alsa/use-case.h>

/*
 * Keep it as simple as possible. Execute commands from the
 * FixedBootSequence and BootSequence only.
 */
int init_ucm(int flags, int cardno)
{
	snd_use_case_mgr_t *uc_mgr;
	char id[32], *nodev;
	int err;

	if (flags & FLAG_UCM_DISABLED) {
		dbg("ucm disabled");
		return -ENXIO;
	}

	nodev = (flags & FLAG_UCM_NODEV) ? "" : "-";
	snprintf(id, sizeof(id), "%shw:%d", nodev, cardno);
	err = snd_use_case_mgr_open(&uc_mgr, id);
	dbg("ucm open '%s': %d", id, err);
	if (err < 0)
		return err;
	if (flags & FLAG_UCM_FBOOT) {
		err = snd_use_case_set(uc_mgr, "_fboot", NULL);
		dbg("ucm _fboot: %d", err);
		if (err == -ENOENT && (flags & FLAG_UCM_BOOT) != 0) {
			/* nothing */
		} else if (err < 0) {
			goto _error;
		}
	}
	if (flags & FLAG_UCM_BOOT) {
		err = snd_use_case_set(uc_mgr, "_boot", NULL);
		dbg("ucm _boot: %d", err);
		if (err < 0)
			goto _error;
		if ((flags & FLAG_UCM_DEFAULTS) != 0)
			err = snd_use_case_set(uc_mgr, "_defaults", NULL);
	}
_error:
	snd_use_case_mgr_close(uc_mgr);
	return err;
}

#else

int init_ucm(int flags, int cardno)
{
	return -ENXIO;
}

#endif