/*

 *  Timer Interface - main file

 *  Copyright (c) 1998-2001 by Jaroslav Kysela <perex@perex.cz>

 *

 *

 *   This library is free software; you can redistribute it and/or modify

 *   it under the terms of the GNU Lesser General Public License as

 *   published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.

 *

 *   You should have received a copy of the GNU Lesser General Public

 *   License along with this library; if not, write to the Free Software

 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

 *

 */

#include "timer_local.h"

#ifndef PIC

/* entry for static linking */

const char *_snd_module_timer_query_hw = "";

#endif

#define SNDRV_FILE_TIMER		ALSA_DEVICE_DIRECTORY "timer"

#define SNDRV_TIMER_VERSION_MAX	SNDRV_PROTOCOL_VERSION(2, 0, 0)

static int snd_timer_query_hw_close(snd_timer_query_t *handle)

{

	int res;

	if (!handle)

		return -EINVAL;

	res = close(handle->poll_fd) < 0 ? -errno : 0;

	return res;

}

static int snd_timer_query_hw_next_device(snd_timer_query_t *handle, snd_timer_id_t * tid)

{

	if (!handle || !tid)

		return -EINVAL;

	if (ioctl(handle->poll_fd, SNDRV_TIMER_IOCTL_NEXT_DEVICE, tid) < 0)

		return -errno;

	return 0;

}

static int snd_timer_query_hw_info(snd_timer_query_t *handle, snd_timer_ginfo_t *info)

{

	if (!handle || !info)

		return -EINVAL;

	if (ioctl(handle->poll_fd, SNDRV_TIMER_IOCTL_GINFO, info) < 0)

		return -errno;

	return 0;

}

static int snd_timer_query_hw_params(snd_timer_query_t *handle, snd_timer_gparams_t *params)

{

	if (!handle || !params)

		return -EINVAL;

	if (ioctl(handle->poll_fd, SNDRV_TIMER_IOCTL_GPARAMS, params) < 0)

		return -errno;

	return 0;

}

static int snd_timer_query_hw_status(snd_timer_query_t *handle, snd_timer_gstatus_t *status)

{

	if (!handle || !status)

		return -EINVAL;

	if (ioctl(handle->poll_fd, SNDRV_TIMER_IOCTL_GSTATUS, status) < 0)

		return -errno;

	return 0;

}

static const snd_timer_query_ops_t snd_timer_query_hw_ops = {

	.close = snd_timer_query_hw_close,

	.next_device = snd_timer_query_hw_next_device,

	.info = snd_timer_query_hw_info,

	.params = snd_timer_query_hw_params,

	.status = snd_timer_query_hw_status

};

int snd_timer_query_hw_open(snd_timer_query_t **handle, const char *name, int mode)

{

	int fd, ver, tmode;

	snd_timer_query_t *tmr;

	*handle = NULL;

	tmode = O_RDONLY;

	if (mode & SND_TIMER_OPEN_NONBLOCK)

		tmode |= O_NONBLOCK;	

	fd = snd_open_device(SNDRV_FILE_TIMER, tmode);

	if (fd < 0)

		return -errno;

	if (ioctl(fd, SNDRV_TIMER_IOCTL_PVERSION, &ver) < 0) {

		close(fd);

		return -errno;

	}

	if (SNDRV_PROTOCOL_INCOMPATIBLE(ver, SNDRV_TIMER_VERSION_MAX)) {

		close(fd);

		return -SND_ERROR_INCOMPATIBLE_VERSION;

	}

	tmr = (snd_timer_query_t *) calloc(1, sizeof(snd_timer_t));

	if (tmr == NULL) {

		close(fd);

		return -ENOMEM;

	}

	tmr->type = SND_TIMER_TYPE_HW;

	tmr->mode = tmode;

	tmr->name = strdup(name);

	tmr->poll_fd = fd;

	tmr->ops = &snd_timer_query_hw_ops;

	*handle = tmr;

	return 0;

}

int _snd_timer_query_hw_open(snd_timer_query_t **timer, char *name,

			     snd_config_t *root ATTRIBUTE_UNUSED,

			     snd_config_t *conf, int mode)

{

	snd_config_iterator_t i, next;

	snd_config_for_each(i, next, conf) {

		snd_config_t *n = snd_config_iterator_entry(i);

		const char *id;

		if (snd_config_get_id(n, &id) < 0)

			continue;

		if (_snd_conf_generic_id(id))

			continue;

		SNDERR("Unexpected field %s", id);

		return -EINVAL;

	}

	return snd_timer_query_hw_open(timer, name, mode);

}

SND_DLSYM_BUILD_VERSION(_snd_timer_query_hw_open, SND_TIMER_QUERY_DLSYM_VERSION);