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 | |
18 | enum /* 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 | |
24 | struct 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 | |
36 | struct 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 | |
46 | struct 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 | |
68 | int usb6fire_pcm_init(struct sfire_chip *chip); |
69 | void usb6fire_pcm_abort(struct sfire_chip *chip); |
70 | void usb6fire_pcm_destroy(struct sfire_chip *chip); |
71 | #endif /* USB6FIRE_PCM_H */ |
72 | |