1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Linux driver for TerraTec DMX 6Fire USB 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Author: Torsten Schenk <torsten.schenk@zoho.com> 6*4882a593Smuzhiyun * Created: Jan 01, 2011 7*4882a593Smuzhiyun * Copyright: (C) Torsten Schenk 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #ifndef USB6FIRE_PCM_H 11*4882a593Smuzhiyun #define USB6FIRE_PCM_H 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun #include <sound/pcm.h> 14*4882a593Smuzhiyun #include <linux/mutex.h> 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun #include "common.h" 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun enum /* settings for pcm */ 19*4882a593Smuzhiyun { 20*4882a593Smuzhiyun /* maximum of EP_W_MAX_PACKET_SIZE[] (see firmware.c) */ 21*4882a593Smuzhiyun PCM_N_URBS = 16, PCM_N_PACKETS_PER_URB = 8, PCM_MAX_PACKET_SIZE = 604 22*4882a593Smuzhiyun }; 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun struct pcm_urb { 25*4882a593Smuzhiyun struct sfire_chip *chip; 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun /* BEGIN DO NOT SEPARATE */ 28*4882a593Smuzhiyun struct urb instance; 29*4882a593Smuzhiyun struct usb_iso_packet_descriptor packets[PCM_N_PACKETS_PER_URB]; 30*4882a593Smuzhiyun /* END DO NOT SEPARATE */ 31*4882a593Smuzhiyun u8 *buffer; 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun struct pcm_urb *peer; 34*4882a593Smuzhiyun }; 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun struct pcm_substream { 37*4882a593Smuzhiyun spinlock_t lock; 38*4882a593Smuzhiyun struct snd_pcm_substream *instance; 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun bool active; 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun snd_pcm_uframes_t dma_off; /* current position in alsa dma_area */ 43*4882a593Smuzhiyun snd_pcm_uframes_t period_off; /* current position in current period */ 44*4882a593Smuzhiyun }; 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun struct pcm_runtime { 47*4882a593Smuzhiyun struct sfire_chip *chip; 48*4882a593Smuzhiyun struct snd_pcm *instance; 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun struct pcm_substream playback; 51*4882a593Smuzhiyun struct pcm_substream capture; 52*4882a593Smuzhiyun bool panic; /* if set driver won't do anymore pcm on device */ 53*4882a593Smuzhiyun 54*4882a593Smuzhiyun struct pcm_urb in_urbs[PCM_N_URBS]; 55*4882a593Smuzhiyun struct pcm_urb out_urbs[PCM_N_URBS]; 56*4882a593Smuzhiyun int in_packet_size; 57*4882a593Smuzhiyun int out_packet_size; 58*4882a593Smuzhiyun int in_n_analog; /* number of analog channels soundcard sends */ 59*4882a593Smuzhiyun int out_n_analog; /* number of analog channels soundcard receives */ 60*4882a593Smuzhiyun 61*4882a593Smuzhiyun struct mutex stream_mutex; 62*4882a593Smuzhiyun u8 stream_state; /* one of STREAM_XXX (pcm.c) */ 63*4882a593Smuzhiyun u8 rate; /* one of PCM_RATE_XXX */ 64*4882a593Smuzhiyun wait_queue_head_t stream_wait_queue; 65*4882a593Smuzhiyun bool stream_wait_cond; 66*4882a593Smuzhiyun }; 67*4882a593Smuzhiyun 68*4882a593Smuzhiyun int usb6fire_pcm_init(struct sfire_chip *chip); 69*4882a593Smuzhiyun void usb6fire_pcm_abort(struct sfire_chip *chip); 70*4882a593Smuzhiyun void usb6fire_pcm_destroy(struct sfire_chip *chip); 71*4882a593Smuzhiyun #endif /* USB6FIRE_PCM_H */ 72