1*2874c5fdSThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-or-later */ 2c6d43ba8STorsten Schenk /* 3c6d43ba8STorsten Schenk * Linux driver for TerraTec DMX 6Fire USB 4c6d43ba8STorsten Schenk * 5c6d43ba8STorsten Schenk * Author: Torsten Schenk <torsten.schenk@zoho.com> 6c6d43ba8STorsten Schenk * Created: Jan 01, 2011 7c6d43ba8STorsten Schenk * Copyright: (C) Torsten Schenk 8c6d43ba8STorsten Schenk */ 9c6d43ba8STorsten Schenk 10c6d43ba8STorsten Schenk #ifndef USB6FIRE_PCM_H 11c6d43ba8STorsten Schenk #define USB6FIRE_PCM_H 12c6d43ba8STorsten Schenk 13c6d43ba8STorsten Schenk #include <sound/pcm.h> 14c6d43ba8STorsten Schenk #include <linux/mutex.h> 15c6d43ba8STorsten Schenk 16c6d43ba8STorsten Schenk #include "common.h" 17c6d43ba8STorsten Schenk 18c6d43ba8STorsten Schenk enum /* settings for pcm */ 19c6d43ba8STorsten Schenk { 20c6d43ba8STorsten Schenk /* maximum of EP_W_MAX_PACKET_SIZE[] (see firmware.c) */ 21c6d43ba8STorsten Schenk PCM_N_URBS = 16, PCM_N_PACKETS_PER_URB = 8, PCM_MAX_PACKET_SIZE = 604 22c6d43ba8STorsten Schenk }; 23c6d43ba8STorsten Schenk 24c6d43ba8STorsten Schenk struct pcm_urb { 25c6d43ba8STorsten Schenk struct sfire_chip *chip; 26c6d43ba8STorsten Schenk 27c6d43ba8STorsten Schenk /* BEGIN DO NOT SEPARATE */ 28c6d43ba8STorsten Schenk struct urb instance; 29c6d43ba8STorsten Schenk struct usb_iso_packet_descriptor packets[PCM_N_PACKETS_PER_URB]; 30c6d43ba8STorsten Schenk /* END DO NOT SEPARATE */ 315ece263fSTorsten Schenk u8 *buffer; 32c6d43ba8STorsten Schenk 33c6d43ba8STorsten Schenk struct pcm_urb *peer; 34c6d43ba8STorsten Schenk }; 35c6d43ba8STorsten Schenk 36c6d43ba8STorsten Schenk struct pcm_substream { 37c6d43ba8STorsten Schenk spinlock_t lock; 38c6d43ba8STorsten Schenk struct snd_pcm_substream *instance; 39c6d43ba8STorsten Schenk 40c6d43ba8STorsten Schenk bool active; 41c6d43ba8STorsten Schenk 42c6d43ba8STorsten Schenk snd_pcm_uframes_t dma_off; /* current position in alsa dma_area */ 43c6d43ba8STorsten Schenk snd_pcm_uframes_t period_off; /* current position in current period */ 44c6d43ba8STorsten Schenk }; 45c6d43ba8STorsten Schenk 46c6d43ba8STorsten Schenk struct pcm_runtime { 47c6d43ba8STorsten Schenk struct sfire_chip *chip; 48c6d43ba8STorsten Schenk struct snd_pcm *instance; 49c6d43ba8STorsten Schenk 50c6d43ba8STorsten Schenk struct pcm_substream playback; 51c6d43ba8STorsten Schenk struct pcm_substream capture; 52c6d43ba8STorsten Schenk bool panic; /* if set driver won't do anymore pcm on device */ 53c6d43ba8STorsten Schenk 54c6d43ba8STorsten Schenk struct pcm_urb in_urbs[PCM_N_URBS]; 55c6d43ba8STorsten Schenk struct pcm_urb out_urbs[PCM_N_URBS]; 56c6d43ba8STorsten Schenk int in_packet_size; 57c6d43ba8STorsten Schenk int out_packet_size; 58c6d43ba8STorsten Schenk int in_n_analog; /* number of analog channels soundcard sends */ 59c6d43ba8STorsten Schenk int out_n_analog; /* number of analog channels soundcard receives */ 60c6d43ba8STorsten Schenk 61c6d43ba8STorsten Schenk struct mutex stream_mutex; 62c6d43ba8STorsten Schenk u8 stream_state; /* one of STREAM_XXX (pcm.c) */ 63c6d43ba8STorsten Schenk u8 rate; /* one of PCM_RATE_XXX */ 64c6d43ba8STorsten Schenk wait_queue_head_t stream_wait_queue; 65c6d43ba8STorsten Schenk bool stream_wait_cond; 66c6d43ba8STorsten Schenk }; 67c6d43ba8STorsten Schenk 6887f9796aSBill Pemberton int usb6fire_pcm_init(struct sfire_chip *chip); 69c6d43ba8STorsten Schenk void usb6fire_pcm_abort(struct sfire_chip *chip); 70c6d43ba8STorsten Schenk void usb6fire_pcm_destroy(struct sfire_chip *chip); 71c6d43ba8STorsten Schenk #endif /* USB6FIRE_PCM_H */ 72