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71 lines
1.7 KiB
71 lines
1.7 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* Linux driver for TerraTec DMX 6Fire USB |
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* |
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* Author: Torsten Schenk <[email protected]> |
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* Created: Jan 01, 2011 |
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* Copyright: (C) Torsten Schenk |
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*/ |
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#ifndef USB6FIRE_PCM_H |
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#define USB6FIRE_PCM_H |
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#include <sound/pcm.h> |
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#include <linux/mutex.h> |
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#include "common.h" |
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enum /* settings for pcm */ |
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{ |
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/* maximum of EP_W_MAX_PACKET_SIZE[] (see firmware.c) */ |
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PCM_N_URBS = 16, PCM_N_PACKETS_PER_URB = 8, PCM_MAX_PACKET_SIZE = 604 |
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}; |
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struct pcm_urb { |
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struct sfire_chip *chip; |
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/* BEGIN DO NOT SEPARATE */ |
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struct urb instance; |
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struct usb_iso_packet_descriptor packets[PCM_N_PACKETS_PER_URB]; |
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/* END DO NOT SEPARATE */ |
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u8 *buffer; |
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struct pcm_urb *peer; |
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}; |
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struct pcm_substream { |
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spinlock_t lock; |
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struct snd_pcm_substream *instance; |
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bool active; |
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snd_pcm_uframes_t dma_off; /* current position in alsa dma_area */ |
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snd_pcm_uframes_t period_off; /* current position in current period */ |
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}; |
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struct pcm_runtime { |
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struct sfire_chip *chip; |
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struct snd_pcm *instance; |
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struct pcm_substream playback; |
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struct pcm_substream capture; |
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bool panic; /* if set driver won't do anymore pcm on device */ |
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struct pcm_urb in_urbs[PCM_N_URBS]; |
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struct pcm_urb out_urbs[PCM_N_URBS]; |
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int in_packet_size; |
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int out_packet_size; |
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int in_n_analog; /* number of analog channels soundcard sends */ |
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int out_n_analog; /* number of analog channels soundcard receives */ |
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struct mutex stream_mutex; |
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u8 stream_state; /* one of STREAM_XXX (pcm.c) */ |
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u8 rate; /* one of PCM_RATE_XXX */ |
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wait_queue_head_t stream_wait_queue; |
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bool stream_wait_cond; |
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}; |
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int usb6fire_pcm_init(struct sfire_chip *chip); |
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void usb6fire_pcm_abort(struct sfire_chip *chip); |
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void usb6fire_pcm_destroy(struct sfire_chip *chip); |
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#endif /* USB6FIRE_PCM_H */
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