| /* |
| * 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 */ |