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/*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#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 (strcmp(id, "comment") == 0)
continue;
if (strcmp(id, "type") == 0)
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);
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