181 lines
5.1 KiB
C
181 lines
5.1 KiB
C
#ifndef __USBAUDIO_H
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#define __USBAUDIO_H
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/*
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* (Tentative) USB Audio Driver for ALSA
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*
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* Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* maximum number of endpoints per interface */
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#define MIDI_MAX_ENDPOINTS 2
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/* handling of USB vendor/product ID pairs as 32-bit numbers */
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#define USB_ID(vendor, product) (((vendor) << 16) | (product))
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#define USB_ID_VENDOR(id) ((id) >> 16)
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#define USB_ID_PRODUCT(id) ((u16)(id))
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/*
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*/
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struct snd_usb_audio {
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int index;
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struct usb_device *dev;
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struct snd_card *card;
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u32 usb_id;
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int shutdown;
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unsigned int txfr_quirk:1; /* Subframe boundaries on transfers */
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int num_interfaces;
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int num_suspended_intf;
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/* for audio class v2 */
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int clock_id;
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struct list_head pcm_list; /* list of pcm streams */
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int pcm_devs;
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struct list_head midi_list; /* list of midi interfaces */
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struct list_head mixer_list; /* list of mixer interfaces */
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};
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/*
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* Information about devices with broken descriptors
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*/
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/* special values for .ifnum */
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#define QUIRK_NO_INTERFACE -2
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#define QUIRK_ANY_INTERFACE -1
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enum quirk_type {
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QUIRK_IGNORE_INTERFACE,
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QUIRK_COMPOSITE,
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QUIRK_MIDI_STANDARD_INTERFACE,
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QUIRK_MIDI_FIXED_ENDPOINT,
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QUIRK_MIDI_YAMAHA,
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QUIRK_MIDI_MIDIMAN,
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QUIRK_MIDI_NOVATION,
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QUIRK_MIDI_FASTLANE,
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QUIRK_MIDI_EMAGIC,
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QUIRK_MIDI_CME,
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QUIRK_MIDI_US122L,
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QUIRK_AUDIO_STANDARD_INTERFACE,
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QUIRK_AUDIO_FIXED_ENDPOINT,
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QUIRK_AUDIO_EDIROL_UAXX,
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QUIRK_AUDIO_ALIGN_TRANSFER,
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QUIRK_TYPE_COUNT
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};
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struct snd_usb_audio_quirk {
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const char *vendor_name;
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const char *product_name;
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int16_t ifnum;
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uint16_t type;
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const void *data;
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};
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/* data for QUIRK_MIDI_FIXED_ENDPOINT */
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struct snd_usb_midi_endpoint_info {
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int8_t out_ep; /* ep number, 0 autodetect */
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uint8_t out_interval; /* interval for interrupt endpoints */
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int8_t in_ep;
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uint8_t in_interval;
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uint16_t out_cables; /* bitmask */
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uint16_t in_cables; /* bitmask */
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};
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/* for QUIRK_MIDI_YAMAHA, data is NULL */
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/* for QUIRK_MIDI_MIDIMAN, data points to a snd_usb_midi_endpoint_info
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* structure (out_cables and in_cables only) */
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/* for QUIRK_COMPOSITE, data points to an array of snd_usb_audio_quirk
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* structures, terminated with .ifnum = -1 */
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/* for QUIRK_AUDIO_FIXED_ENDPOINT, data points to an audioformat structure */
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/* for QUIRK_AUDIO/MIDI_STANDARD_INTERFACE, data is NULL */
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/* for QUIRK_AUDIO_EDIROL_UAXX, data is NULL */
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/* for QUIRK_IGNORE_INTERFACE, data is NULL */
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/* for QUIRK_MIDI_NOVATION and _RAW, data is NULL */
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/* for QUIRK_MIDI_EMAGIC, data points to a snd_usb_midi_endpoint_info
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* structure (out_cables and in_cables only) */
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/* for QUIRK_MIDI_CME, data is NULL */
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/*
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*/
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/*E-mu USB samplerate control quirk*/
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enum {
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EMU_QUIRK_SR_44100HZ = 0,
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EMU_QUIRK_SR_48000HZ,
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EMU_QUIRK_SR_88200HZ,
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EMU_QUIRK_SR_96000HZ,
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EMU_QUIRK_SR_176400HZ,
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EMU_QUIRK_SR_192000HZ
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};
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#define combine_word(s) ((*(s)) | ((unsigned int)(s)[1] << 8))
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#define combine_triple(s) (combine_word(s) | ((unsigned int)(s)[2] << 16))
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#define combine_quad(s) (combine_triple(s) | ((unsigned int)(s)[3] << 24))
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unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size);
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void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype);
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void *snd_usb_find_csint_desc(void *descstart, int desclen, void *after, u8 dsubtype);
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int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe,
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__u8 request, __u8 requesttype, __u16 value, __u16 index,
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void *data, __u16 size, int timeout);
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int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
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int ignore_error);
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void snd_usb_mixer_disconnect(struct list_head *p);
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int snd_usbmidi_create(struct snd_card *card,
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struct usb_interface *iface,
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struct list_head *midi_list,
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const struct snd_usb_audio_quirk *quirk);
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void snd_usbmidi_input_stop(struct list_head* p);
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void snd_usbmidi_input_start(struct list_head* p);
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void snd_usbmidi_disconnect(struct list_head *p);
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void snd_emuusb_set_samplerate(struct snd_usb_audio *chip,
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unsigned char samplerate_id);
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/*
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* retrieve usb_interface descriptor from the host interface
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* (conditional for compatibility with the older API)
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*/
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#ifndef get_iface_desc
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#define get_iface_desc(iface) (&(iface)->desc)
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#define get_endpoint(alt,ep) (&(alt)->endpoint[ep].desc)
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#define get_ep_desc(ep) (&(ep)->desc)
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#define get_cfg_desc(cfg) (&(cfg)->desc)
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#endif
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#ifndef snd_usb_get_speed
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#define snd_usb_get_speed(dev) ((dev)->speed)
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#endif
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#endif /* __USBAUDIO_H */
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