/*
* 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_hw = "";
#endif
#define SNDRV_FILE_TIMER ALSA_DEVICE_DIRECTORY "timer"
#define SNDRV_TIMER_VERSION_MAX SNDRV_PROTOCOL_VERSION(2, 0, 5)
#define SNDRV_TIMER_IOCTL_STATUS_OLD _IOW('T', 0x14, struct snd_timer_status)
enum {
SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20),
SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21),
SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22),
SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23),
};
static int snd_timer_hw_close(snd_timer_t *handle)
{
snd_timer_t *tmr = handle;
int res;
if (!tmr)
return -EINVAL;
res = close(tmr->poll_fd) < 0 ? -errno : 0;
return res;
}
static int snd_timer_hw_nonblock(snd_timer_t *timer, int nonblock)
{
long flags;
assert(timer);
if ((flags = fcntl(timer->poll_fd, F_GETFL)) < 0)
return -errno;
if (nonblock)
flags |= O_NONBLOCK;
else
flags &= ~O_NONBLOCK;
if (fcntl(timer->poll_fd, F_SETFL, flags) < 0)
return -errno;
return 0;
}
static int snd_timer_hw_async(snd_timer_t *timer, int sig, pid_t pid)
{
long flags;
int fd;
assert(timer);
fd = timer->poll_fd;
if ((flags = fcntl(fd, F_GETFL)) < 0) {
SYSERR("F_GETFL failed");
return -errno;
}
if (sig >= 0)
flags |= O_ASYNC;
else
flags &= ~O_ASYNC;
if (fcntl(fd, F_SETFL, flags) < 0) {
SYSERR("F_SETFL for O_ASYNC failed");
return -errno;
}
if (sig < 0)
return 0;
#ifdef F_SETSIG
if (fcntl(fd, F_SETSIG, (long)sig) < 0) {
SYSERR("F_SETSIG failed");
return -errno;
}
#endif
if (fcntl(fd, F_SETOWN, (long)pid) < 0) {
SYSERR("F_SETOWN failed");
return -errno;
}
return 0;
}
static int snd_timer_hw_info(snd_timer_t *handle, snd_timer_info_t * info)
{
snd_timer_t *tmr;
tmr = handle;
if (!tmr || !info)
return -EINVAL;
if (ioctl(tmr->poll_fd, SNDRV_TIMER_IOCTL_INFO, info) < 0)
return -errno;
return 0;
}
static int snd_timer_hw_params(snd_timer_t *handle, snd_timer_params_t * params)
{
snd_timer_t *tmr;
tmr = handle;
if (!tmr || !params)
return -EINVAL;
if (ioctl(tmr->poll_fd, SNDRV_TIMER_IOCTL_PARAMS, params) < 0)
return -errno;
return 0;
}
static int snd_timer_hw_status(snd_timer_t *handle, snd_timer_status_t * status)
{
snd_timer_t *tmr;
int cmd;
tmr = handle;
if (!tmr || !status)
return -EINVAL;
if (tmr->version < SNDRV_PROTOCOL_VERSION(2, 0, 1))
cmd = SNDRV_TIMER_IOCTL_STATUS_OLD;
else
cmd = SNDRV_TIMER_IOCTL_STATUS;
if (ioctl(tmr->poll_fd, cmd, status) < 0)
return -errno;
return 0;
}
static int snd_timer_hw_start(snd_timer_t *handle)
{
snd_timer_t *tmr;
unsigned int cmd;
tmr = handle;
if (!tmr)
return -EINVAL;
if (tmr->version < SNDRV_PROTOCOL_VERSION(2, 0, 4))
cmd = SNDRV_TIMER_IOCTL_START_OLD;
else
cmd = SNDRV_TIMER_IOCTL_START;
if (ioctl(tmr->poll_fd, cmd) < 0)
return -errno;
return 0;
}
static int snd_timer_hw_stop(snd_timer_t *handle)
{
snd_timer_t *tmr;
unsigned int cmd;
tmr = handle;
if (!tmr)
return -EINVAL;
if (tmr->version < SNDRV_PROTOCOL_VERSION(2, 0, 4))
cmd = SNDRV_TIMER_IOCTL_STOP_OLD;
else
cmd = SNDRV_TIMER_IOCTL_STOP;
if (ioctl(tmr->poll_fd, cmd) < 0)
return -errno;
return 0;
}
static int snd_timer_hw_continue(snd_timer_t *handle)
{
snd_timer_t *tmr;
unsigned int cmd;
tmr = handle;
if (!tmr)
return -EINVAL;
if (tmr->version < SNDRV_PROTOCOL_VERSION(2, 0, 4))
cmd = SNDRV_TIMER_IOCTL_CONTINUE_OLD;
else
cmd = SNDRV_TIMER_IOCTL_CONTINUE;
if (ioctl(tmr->poll_fd, cmd) < 0)
return -errno;
return 0;
}
static ssize_t snd_timer_hw_read(snd_timer_t *handle, void *buffer, size_t size)
{
snd_timer_t *tmr;
ssize_t result;
tmr = handle;
if (!tmr || (!buffer && size > 0))
return -EINVAL;
result = read(tmr->poll_fd, buffer, size);
if (result < 0)
return -errno;
return result;
}
static const snd_timer_ops_t snd_timer_hw_ops = {
.close = snd_timer_hw_close,
.nonblock = snd_timer_hw_nonblock,
.async = snd_timer_hw_async,
.info = snd_timer_hw_info,
.params = snd_timer_hw_params,
.status = snd_timer_hw_status,
.rt_start = snd_timer_hw_start,
.rt_stop = snd_timer_hw_stop,
.rt_continue = snd_timer_hw_continue,
.read = snd_timer_hw_read,
};
int snd_timer_hw_open(snd_timer_t **handle, const char *name, int dev_class, int dev_sclass, int card, int device, int subdevice, int mode)
{
int fd, ver, tmode, ret;
snd_timer_t *tmr;
struct snd_timer_select sel;
*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) {
ret = -errno;
close(fd);
return ret;
}
if (SNDRV_PROTOCOL_INCOMPATIBLE(ver, SNDRV_TIMER_VERSION_MAX)) {
close(fd);
return -SND_ERROR_INCOMPATIBLE_VERSION;
}
if (mode & SND_TIMER_OPEN_TREAD) {
int arg = 1;
if (ver < SNDRV_PROTOCOL_VERSION(2, 0, 3)) {
ret = -ENOTTY;
goto __no_tread;
}
if (ioctl(fd, SNDRV_TIMER_IOCTL_TREAD, &arg) < 0) {
ret = -errno;
__no_tread:
close(fd);
SNDMSG("extended read is not supported (SNDRV_TIMER_IOCTL_TREAD)");
return ret;
}
}
memset(&sel, 0, sizeof(sel));
sel.id.dev_class = dev_class;
sel.id.dev_sclass = dev_sclass;
sel.id.card = card;
sel.id.device = device;
sel.id.subdevice = subdevice;
if (ioctl(fd, SNDRV_TIMER_IOCTL_SELECT, &sel) < 0) {
ret = -errno;
close(fd);
return ret;
}
tmr = (snd_timer_t *) calloc(1, sizeof(snd_timer_t));
if (tmr == NULL) {
close(fd);
return -ENOMEM;
}
tmr->type = SND_TIMER_TYPE_HW;
tmr->version = ver;
tmr->mode = tmode;
tmr->name = strdup(name);
tmr->poll_fd = fd;
tmr->ops = &snd_timer_hw_ops;
INIT_LIST_HEAD(&tmr->async_handlers);
*handle = tmr;
return 0;
}
int _snd_timer_hw_open(snd_timer_t **timer, char *name,
snd_config_t *root ATTRIBUTE_UNUSED,
snd_config_t *conf, int mode)
{
snd_config_iterator_t i, next;
long dev_class = SND_TIMER_CLASS_GLOBAL, dev_sclass = SND_TIMER_SCLASS_NONE;
long card = 0, device = 0, subdevice = 0;
const char *str;
int err;
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;
if (strcmp(id, "class") == 0) {
err = snd_config_get_integer(n, &dev_class);
if (err < 0)
return err;
continue;
}
if (strcmp(id, "sclass") == 0) {
err = snd_config_get_integer(n, &dev_sclass);
if (err < 0)
return err;
continue;
}
if (strcmp(id, "card") == 0) {
err = snd_config_get_integer(n, &card);
if (err < 0) {
err = snd_config_get_string(n, &str);
if (err < 0)
return -EINVAL;
card = snd_card_get_index(str);
if (card < 0)
return card;
}
continue;
}
if (strcmp(id, "device") == 0) {
err = snd_config_get_integer(n, &device);
if (err < 0)
return err;
continue;
}
if (strcmp(id, "subdevice") == 0) {
err = snd_config_get_integer(n, &subdevice);
if (err < 0)
return err;
continue;
}
SNDERR("Unexpected field %s", id);
return -EINVAL;
}
if (card < 0)
return -EINVAL;
return snd_timer_hw_open(timer, name, dev_class, dev_sclass, card, device, subdevice, mode);
}
SND_DLSYM_BUILD_VERSION(_snd_timer_hw_open, SND_TIMER_DLSYM_VERSION);