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Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
/* 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 <torsten.schenk@zoho.com>
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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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