1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 * Linux driver for TerraTec DMX 6Fire USB
 4 *
 5 * Author:	Torsten Schenk <torsten.schenk@zoho.com>
 6 * Created:	Jan 01, 2011
 7 * Copyright:	(C) Torsten Schenk
 8 */
 9
10#ifndef USB6FIRE_PCM_H
11#define USB6FIRE_PCM_H
12
13#include <sound/pcm.h>
14#include <linux/mutex.h>
15
16#include "common.h"
17
18enum /* settings for pcm */
19{
20	/* maximum of EP_W_MAX_PACKET_SIZE[] (see firmware.c) */
21	PCM_N_URBS = 16, PCM_N_PACKETS_PER_URB = 8, PCM_MAX_PACKET_SIZE = 604
22};
23
24struct pcm_urb {
25	struct sfire_chip *chip;
26
27	/* BEGIN DO NOT SEPARATE */
28	struct urb instance;
29	struct usb_iso_packet_descriptor packets[PCM_N_PACKETS_PER_URB];
30	/* END DO NOT SEPARATE */
31	u8 *buffer;
32
33	struct pcm_urb *peer;
34};
35
36struct pcm_substream {
37	spinlock_t lock;
38	struct snd_pcm_substream *instance;
39
40	bool active;
41
42	snd_pcm_uframes_t dma_off; /* current position in alsa dma_area */
43	snd_pcm_uframes_t period_off; /* current position in current period */
44};
45
46struct pcm_runtime {
47	struct sfire_chip *chip;
48	struct snd_pcm *instance;
49
50	struct pcm_substream playback;
51	struct pcm_substream capture;
52	bool panic; /* if set driver won't do anymore pcm on device */
53
54	struct pcm_urb in_urbs[PCM_N_URBS];
55	struct pcm_urb out_urbs[PCM_N_URBS];
56	int in_packet_size;
57	int out_packet_size;
58	int in_n_analog; /* number of analog channels soundcard sends */
59	int out_n_analog; /* number of analog channels soundcard receives */
60
61	struct mutex stream_mutex;
62	u8 stream_state; /* one of STREAM_XXX (pcm.c) */
63	u8 rate; /* one of PCM_RATE_XXX */
64	wait_queue_head_t stream_wait_queue;
65	bool stream_wait_cond;
66};
67
68int usb6fire_pcm_init(struct sfire_chip *chip);
69void usb6fire_pcm_abort(struct sfire_chip *chip);
70void usb6fire_pcm_destroy(struct sfire_chip *chip);
71#endif /* USB6FIRE_PCM_H */

 1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 * Linux driver for TerraTec DMX 6Fire USB
 4 *
 5 * Author:	Torsten Schenk <torsten.schenk@zoho.com>
 6 * Created:	Jan 01, 2011
 7 * Copyright:	(C) Torsten Schenk
 8 */
 9
10#ifndef USB6FIRE_PCM_H
11#define USB6FIRE_PCM_H
12
13#include <sound/pcm.h>
14#include <linux/mutex.h>
15
16#include "common.h"
17
18enum /* settings for pcm */
19{
20	/* maximum of EP_W_MAX_PACKET_SIZE[] (see firmware.c) */
21	PCM_N_URBS = 16, PCM_N_PACKETS_PER_URB = 8, PCM_MAX_PACKET_SIZE = 604
22};
23
24struct pcm_urb {
25	struct sfire_chip *chip;
26
27	/* BEGIN DO NOT SEPARATE */
28	struct urb instance;
29	struct usb_iso_packet_descriptor packets[PCM_N_PACKETS_PER_URB];
30	/* END DO NOT SEPARATE */
31	u8 *buffer;
32
33	struct pcm_urb *peer;
34};
35
36struct pcm_substream {
37	spinlock_t lock;
38	struct snd_pcm_substream *instance;
39
40	bool active;
41
42	snd_pcm_uframes_t dma_off; /* current position in alsa dma_area */
43	snd_pcm_uframes_t period_off; /* current position in current period */
44};
45
46struct pcm_runtime {
47	struct sfire_chip *chip;
48	struct snd_pcm *instance;
49
50	struct pcm_substream playback;
51	struct pcm_substream capture;
52	bool panic; /* if set driver won't do anymore pcm on device */
53
54	struct pcm_urb in_urbs[PCM_N_URBS];
55	struct pcm_urb out_urbs[PCM_N_URBS];
56	int in_packet_size;
57	int out_packet_size;
58	int in_n_analog; /* number of analog channels soundcard sends */
59	int out_n_analog; /* number of analog channels soundcard receives */
60
61	struct mutex stream_mutex;
62	u8 stream_state; /* one of STREAM_XXX (pcm.c) */
63	u8 rate; /* one of PCM_RATE_XXX */
64	wait_queue_head_t stream_wait_queue;
65	bool stream_wait_cond;
66};
67
68int usb6fire_pcm_init(struct sfire_chip *chip);
69void usb6fire_pcm_abort(struct sfire_chip *chip);
70void usb6fire_pcm_destroy(struct sfire_chip *chip);
71#endif /* USB6FIRE_PCM_H */