76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
/*
|
|
* Linux driver for TerraTec DMX 6Fire USB
|
|
*
|
|
* Author: Torsten Schenk <torsten.schenk@zoho.com>
|
|
* Created: Jan 01, 2011
|
|
* Copyright: (C) Torsten Schenk
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef USB6FIRE_PCM_H
|
|
#define USB6FIRE_PCM_H
|
|
|
|
#include <sound/pcm.h>
|
|
#include <linux/mutex.h>
|
|
|
|
#include "common.h"
|
|
|
|
enum /* settings for pcm */
|
|
{
|
|
/* maximum of EP_W_MAX_PACKET_SIZE[] (see firmware.c) */
|
|
PCM_N_URBS = 16, PCM_N_PACKETS_PER_URB = 8, PCM_MAX_PACKET_SIZE = 604
|
|
};
|
|
|
|
struct pcm_urb {
|
|
struct sfire_chip *chip;
|
|
|
|
/* BEGIN DO NOT SEPARATE */
|
|
struct urb instance;
|
|
struct usb_iso_packet_descriptor packets[PCM_N_PACKETS_PER_URB];
|
|
/* END DO NOT SEPARATE */
|
|
u8 *buffer;
|
|
|
|
struct pcm_urb *peer;
|
|
};
|
|
|
|
struct pcm_substream {
|
|
spinlock_t lock;
|
|
struct snd_pcm_substream *instance;
|
|
|
|
bool active;
|
|
|
|
snd_pcm_uframes_t dma_off; /* current position in alsa dma_area */
|
|
snd_pcm_uframes_t period_off; /* current position in current period */
|
|
};
|
|
|
|
struct pcm_runtime {
|
|
struct sfire_chip *chip;
|
|
struct snd_pcm *instance;
|
|
|
|
struct pcm_substream playback;
|
|
struct pcm_substream capture;
|
|
bool panic; /* if set driver won't do anymore pcm on device */
|
|
|
|
struct pcm_urb in_urbs[PCM_N_URBS];
|
|
struct pcm_urb out_urbs[PCM_N_URBS];
|
|
int in_packet_size;
|
|
int out_packet_size;
|
|
int in_n_analog; /* number of analog channels soundcard sends */
|
|
int out_n_analog; /* number of analog channels soundcard receives */
|
|
|
|
struct mutex stream_mutex;
|
|
u8 stream_state; /* one of STREAM_XXX (pcm.c) */
|
|
u8 rate; /* one of PCM_RATE_XXX */
|
|
wait_queue_head_t stream_wait_queue;
|
|
bool stream_wait_cond;
|
|
};
|
|
|
|
int usb6fire_pcm_init(struct sfire_chip *chip);
|
|
void usb6fire_pcm_abort(struct sfire_chip *chip);
|
|
void usb6fire_pcm_destroy(struct sfire_chip *chip);
|
|
#endif /* USB6FIRE_PCM_H */
|