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c6d43ba8 TS |
1 | /* |
2 | * Linux driver for TerraTec DMX 6Fire USB | |
3 | * | |
4 | * Author: Torsten Schenk <torsten.schenk@zoho.com> | |
5 | * Created: Jan 01, 2011 | |
c6d43ba8 TS |
6 | * Copyright: (C) Torsten Schenk |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #ifndef USB6FIRE_PCM_H | |
15 | #define USB6FIRE_PCM_H | |
16 | ||
17 | #include <sound/pcm.h> | |
18 | #include <linux/mutex.h> | |
19 | ||
20 | #include "common.h" | |
21 | ||
22 | enum /* settings for pcm */ | |
23 | { | |
24 | /* maximum of EP_W_MAX_PACKET_SIZE[] (see firmware.c) */ | |
25 | PCM_N_URBS = 16, PCM_N_PACKETS_PER_URB = 8, PCM_MAX_PACKET_SIZE = 604 | |
26 | }; | |
27 | ||
28 | struct pcm_urb { | |
29 | struct sfire_chip *chip; | |
30 | ||
31 | /* BEGIN DO NOT SEPARATE */ | |
32 | struct urb instance; | |
33 | struct usb_iso_packet_descriptor packets[PCM_N_PACKETS_PER_URB]; | |
34 | /* END DO NOT SEPARATE */ | |
5ece263f | 35 | u8 *buffer; |
c6d43ba8 TS |
36 | |
37 | struct pcm_urb *peer; | |
38 | }; | |
39 | ||
40 | struct pcm_substream { | |
41 | spinlock_t lock; | |
42 | struct snd_pcm_substream *instance; | |
43 | ||
44 | bool active; | |
45 | ||
46 | snd_pcm_uframes_t dma_off; /* current position in alsa dma_area */ | |
47 | snd_pcm_uframes_t period_off; /* current position in current period */ | |
48 | }; | |
49 | ||
50 | struct pcm_runtime { | |
51 | struct sfire_chip *chip; | |
52 | struct snd_pcm *instance; | |
53 | ||
54 | struct pcm_substream playback; | |
55 | struct pcm_substream capture; | |
56 | bool panic; /* if set driver won't do anymore pcm on device */ | |
57 | ||
58 | struct pcm_urb in_urbs[PCM_N_URBS]; | |
59 | struct pcm_urb out_urbs[PCM_N_URBS]; | |
60 | int in_packet_size; | |
61 | int out_packet_size; | |
62 | int in_n_analog; /* number of analog channels soundcard sends */ | |
63 | int out_n_analog; /* number of analog channels soundcard receives */ | |
64 | ||
65 | struct mutex stream_mutex; | |
66 | u8 stream_state; /* one of STREAM_XXX (pcm.c) */ | |
67 | u8 rate; /* one of PCM_RATE_XXX */ | |
68 | wait_queue_head_t stream_wait_queue; | |
69 | bool stream_wait_cond; | |
70 | }; | |
71 | ||
87f9796a | 72 | int usb6fire_pcm_init(struct sfire_chip *chip); |
c6d43ba8 TS |
73 | void usb6fire_pcm_abort(struct sfire_chip *chip); |
74 | void usb6fire_pcm_destroy(struct sfire_chip *chip); | |
75 | #endif /* USB6FIRE_PCM_H */ |