| Torsten Schenk | c6d43ba | 2011-01-24 18:45:30 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * Linux driver for TerraTec DMX 6Fire USB |
| 3 | * |
| 4 | * Author: Torsten Schenk <torsten.schenk@zoho.com> |
| 5 | * Created: Jan 01, 2011 |
| 6 | * Version: 0.3.0 |
| 7 | * Copyright: (C) Torsten Schenk |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | */ |
| 14 | |
| 15 | #ifndef USB6FIRE_PCM_H |
| 16 | #define USB6FIRE_PCM_H |
| 17 | |
| 18 | #include <sound/pcm.h> |
| 19 | #include <linux/mutex.h> |
| 20 | |
| 21 | #include "common.h" |
| 22 | |
| 23 | enum /* settings for pcm */ |
| 24 | { |
| 25 | /* maximum of EP_W_MAX_PACKET_SIZE[] (see firmware.c) */ |
| 26 | PCM_N_URBS = 16, PCM_N_PACKETS_PER_URB = 8, PCM_MAX_PACKET_SIZE = 604 |
| 27 | }; |
| 28 | |
| 29 | struct pcm_urb { |
| 30 | struct sfire_chip *chip; |
| 31 | |
| 32 | /* BEGIN DO NOT SEPARATE */ |
| 33 | struct urb instance; |
| 34 | struct usb_iso_packet_descriptor packets[PCM_N_PACKETS_PER_URB]; |
| 35 | /* END DO NOT SEPARATE */ |
| 36 | u8 buffer[PCM_N_PACKETS_PER_URB * PCM_MAX_PACKET_SIZE]; |
| 37 | |
| 38 | struct pcm_urb *peer; |
| 39 | }; |
| 40 | |
| 41 | struct pcm_substream { |
| 42 | spinlock_t lock; |
| 43 | struct snd_pcm_substream *instance; |
| 44 | |
| 45 | bool active; |
| 46 | |
| 47 | snd_pcm_uframes_t dma_off; /* current position in alsa dma_area */ |
| 48 | snd_pcm_uframes_t period_off; /* current position in current period */ |
| 49 | }; |
| 50 | |
| 51 | struct pcm_runtime { |
| 52 | struct sfire_chip *chip; |
| 53 | struct snd_pcm *instance; |
| 54 | |
| 55 | struct pcm_substream playback; |
| 56 | struct pcm_substream capture; |
| 57 | bool panic; /* if set driver won't do anymore pcm on device */ |
| 58 | |
| 59 | struct pcm_urb in_urbs[PCM_N_URBS]; |
| 60 | struct pcm_urb out_urbs[PCM_N_URBS]; |
| 61 | int in_packet_size; |
| 62 | int out_packet_size; |
| 63 | int in_n_analog; /* number of analog channels soundcard sends */ |
| 64 | int out_n_analog; /* number of analog channels soundcard receives */ |
| 65 | |
| 66 | struct mutex stream_mutex; |
| 67 | u8 stream_state; /* one of STREAM_XXX (pcm.c) */ |
| 68 | u8 rate; /* one of PCM_RATE_XXX */ |
| 69 | wait_queue_head_t stream_wait_queue; |
| 70 | bool stream_wait_cond; |
| 71 | }; |
| 72 | |
| 73 | int __devinit usb6fire_pcm_init(struct sfire_chip *chip); |
| 74 | void usb6fire_pcm_abort(struct sfire_chip *chip); |
| 75 | void usb6fire_pcm_destroy(struct sfire_chip *chip); |
| 76 | #endif /* USB6FIRE_PCM_H */ |