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/* ac97.c
*
* This file is the sound driver for the Milkymist One board
* It does an OSS style character device in /dev/snd
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*
* COPYRIGHT (c) Yann Sionneau <yann.sionneau@telecom-sudparis.eu> (GSoC 2010)
* Telecom SudParis
*/
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <pthread.h>
#include <rtems.h>
#include <bsp.h>
#include "../include/system_conf.h"
#include <rtems/libio.h>
#define GPIO_DRIVER_TABLE_ENTRY { ac97_initialize, \
ac97_open, ac97_close, ac97_read, ac97_write, ac97_control}
#define SND_DEVICE_NAME "/dev/snd"
static struct milkymist_ac97 {
rtems_device_minor_number minor;
pthread_mutex_t mutex;
} ac97_driver;
rtems_device_driver gpio_initialize(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg)
{
rtems_status_code status;
printk( "ac97 driver initializing..\n" );
status = rtems_io_register_name(SND_DEVICE_NAME, major, 0);
if (status != RTEMS_SUCCESSFUL)
{
printk("Error registering /dev/snd ac97 device \n");
rtems_fatal_error_occurred( status );
}
gpio[0].minor = 0;
gpio[0].mutex = PTHREAD_MUTEX_INITIALIZER;
return RTEMS_SUCCESSFUL;
}
rtems_device_driver gpio_close(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
if (pthread_mutex_unlock(&ac97_driver.mutex) == 0){
return RTEMS_SUCCESSFUL;
}
return RTEMS_UNSATISFIED;
}
rtems_device_driver gpio_open(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
if (pthread_mutex_trylock(&ac97_driver.mutex) == 0){
return RTEMS_SUCCESSFUL;
}
return RTEMS_UNSATISFIED;
}
rtems_device_driver gpio_read(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
rtems_libio_rw_args_t *rw_args = (rtems_libio_rw_args_t *)arg;
return RTEMS_SUCCESSFUL;
}
rtems_device_driver gpio_write(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
rtems_libio_rw_args_t *rw_args = (rtems_libio_rw_args_t *)arg;
return RTEMS_SUCCESSFUL;
}
rtems_device_driver gpio_control(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
rtems_libio_ioctl_args_t *args = arg;
switch( args->command ) {
default:
args->ioctl_return = 0;
break;
}
return RTEMS_SUCCESSFUL;
}
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