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linux/sound/usb/usbaudio.h
Julian Anastasov f495088210 ALSA: usb-audio: fix combine_word problem 
Fix combine_word problem where first octet is not
read properly. The only affected place seems to be the
INPUT_TERMINAL type. Before now, sound controls can be created
with the output terminal's name which is a fallback mechanism
used only for unknown input terminal types. For example,
Line can wrongly appear as Speaker. After the change it
should appear as Line.

	The side effect of this change can be that users
can expect the wrong control name in their scripts or
programs while now we return the correct one.

	Probably, these defines should use get_unaligned_le16 and
friends.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-11-07 09:46:06 +01:00

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#ifndef __USBAUDIO_H
#define __USBAUDIO_H
/*
* (Tentative) USB Audio Driver for ALSA
*
* Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
*
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
*/
#define USB_SUBCLASS_AUDIO_CONTROL 0x01
#define USB_SUBCLASS_AUDIO_STREAMING 0x02
#define USB_SUBCLASS_MIDI_STREAMING 0x03
#define USB_SUBCLASS_VENDOR_SPEC 0xff
#define HEADER 0x01
#define INPUT_TERMINAL 0x02
#define OUTPUT_TERMINAL 0x03
#define MIXER_UNIT 0x04
#define SELECTOR_UNIT 0x05
#define FEATURE_UNIT 0x06
#define PROCESSING_UNIT 0x07
#define EXTENSION_UNIT 0x08
#define AS_GENERAL 0x01
#define FORMAT_TYPE 0x02
#define FORMAT_SPECIFIC 0x03
#define EP_GENERAL 0x01
#define MS_GENERAL 0x01
#define MIDI_IN_JACK 0x02
#define MIDI_OUT_JACK 0x03
/* endpoint attributes */
#define EP_ATTR_MASK 0x0c
#define EP_ATTR_ASYNC 0x04
#define EP_ATTR_ADAPTIVE 0x08
#define EP_ATTR_SYNC 0x0c
/* cs endpoint attributes */
#define EP_CS_ATTR_SAMPLE_RATE 0x01
#define EP_CS_ATTR_PITCH_CONTROL 0x02
#define EP_CS_ATTR_FILL_MAX 0x80
/* Audio Class specific Request Codes */
#define SET_CUR 0x01
#define GET_CUR 0x81
#define SET_MIN 0x02
#define GET_MIN 0x82
#define SET_MAX 0x03
#define GET_MAX 0x83
#define SET_RES 0x04
#define GET_RES 0x84
#define SET_MEM 0x05
#define GET_MEM 0x85
#define GET_STAT 0xff
/* Terminal Control Selectors */
#define COPY_PROTECT_CONTROL 0x01
/* Endpoint Control Selectors */
#define SAMPLING_FREQ_CONTROL 0x01
#define PITCH_CONTROL 0x02
/* Format Types */
#define USB_FORMAT_TYPE_I 0x01
#define USB_FORMAT_TYPE_II 0x02
#define USB_FORMAT_TYPE_III 0x03
/* type I */
#define USB_AUDIO_FORMAT_PCM 0x01
#define USB_AUDIO_FORMAT_PCM8 0x02
#define USB_AUDIO_FORMAT_IEEE_FLOAT 0x03
#define USB_AUDIO_FORMAT_ALAW 0x04
#define USB_AUDIO_FORMAT_MU_LAW 0x05
/* type II */
#define USB_AUDIO_FORMAT_MPEG 0x1001
#define USB_AUDIO_FORMAT_AC3 0x1002
/* type III */
#define USB_AUDIO_FORMAT_IEC1937_AC3 0x2001
#define USB_AUDIO_FORMAT_IEC1937_MPEG1_LAYER1 0x2002
#define USB_AUDIO_FORMAT_IEC1937_MPEG2_NOEXT 0x2003
#define USB_AUDIO_FORMAT_IEC1937_MPEG2_EXT 0x2004
#define USB_AUDIO_FORMAT_IEC1937_MPEG2_LAYER1_LS 0x2005
#define USB_AUDIO_FORMAT_IEC1937_MPEG2_LAYER23_LS 0x2006
/* maximum number of endpoints per interface */
#define MIDI_MAX_ENDPOINTS 2
/* handling of USB vendor/product ID pairs as 32-bit numbers */
#define USB_ID(vendor, product) (((vendor) << 16) | (product))
#define USB_ID_VENDOR(id) ((id) >> 16)
#define USB_ID_PRODUCT(id) ((u16)(id))
/*
*/
struct snd_usb_audio {
int index;
struct usb_device *dev;
struct snd_card *card;
u32 usb_id;
int shutdown;
int num_interfaces;
int num_suspended_intf;
struct list_head pcm_list; /* list of pcm streams */
int pcm_devs;
struct list_head midi_list; /* list of midi interfaces */
int next_midi_device;
struct list_head mixer_list; /* list of mixer interfaces */
};
/*
* Information about devices with broken descriptors
*/
/* special values for .ifnum */
#define QUIRK_NO_INTERFACE -2
#define QUIRK_ANY_INTERFACE -1
enum quirk_type {
QUIRK_IGNORE_INTERFACE,
QUIRK_COMPOSITE,
QUIRK_MIDI_STANDARD_INTERFACE,
QUIRK_MIDI_FIXED_ENDPOINT,
QUIRK_MIDI_YAMAHA,
QUIRK_MIDI_MIDIMAN,
QUIRK_MIDI_NOVATION,
QUIRK_MIDI_FASTLANE,
QUIRK_MIDI_EMAGIC,
QUIRK_MIDI_CME,
QUIRK_MIDI_US122L,
QUIRK_AUDIO_STANDARD_INTERFACE,
QUIRK_AUDIO_FIXED_ENDPOINT,
QUIRK_AUDIO_EDIROL_UA1000,
QUIRK_AUDIO_EDIROL_UA101,
QUIRK_AUDIO_EDIROL_UAXX,
QUIRK_TYPE_COUNT
};
struct snd_usb_audio_quirk {
const char *vendor_name;
const char *product_name;
int16_t ifnum;
uint16_t type;
const void *data;
};
/* data for QUIRK_MIDI_FIXED_ENDPOINT */
struct snd_usb_midi_endpoint_info {
int8_t out_ep; /* ep number, 0 autodetect */
uint8_t out_interval; /* interval for interrupt endpoints */
int8_t in_ep;
uint8_t in_interval;
uint16_t out_cables; /* bitmask */
uint16_t in_cables; /* bitmask */
};
/* for QUIRK_MIDI_YAMAHA, data is NULL */
/* for QUIRK_MIDI_MIDIMAN, data points to a snd_usb_midi_endpoint_info
* structure (out_cables and in_cables only) */
/* for QUIRK_COMPOSITE, data points to an array of snd_usb_audio_quirk
* structures, terminated with .ifnum = -1 */
/* for QUIRK_AUDIO_FIXED_ENDPOINT, data points to an audioformat structure */
/* for QUIRK_AUDIO/MIDI_STANDARD_INTERFACE, data is NULL */
/* for QUIRK_AUDIO_EDIROL_UA700_UA25/UA1000, data is NULL */
/* for QUIRK_IGNORE_INTERFACE, data is NULL */
/* for QUIRK_MIDI_NOVATION and _RAW, data is NULL */
/* for QUIRK_MIDI_EMAGIC, data points to a snd_usb_midi_endpoint_info
* structure (out_cables and in_cables only) */
/* for QUIRK_MIDI_CME, data is NULL */
/*
*/
#define combine_word(s) ((*(s)) | ((unsigned int)(s)[1] << 8))
#define combine_triple(s) (combine_word(s) | ((unsigned int)(s)[2] << 16))
#define combine_quad(s) (combine_triple(s) | ((unsigned int)(s)[3] << 24))
unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size);
void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype);
void *snd_usb_find_csint_desc(void *descstart, int desclen, void *after, u8 dsubtype);
int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe,
__u8 request, __u8 requesttype, __u16 value, __u16 index,
void *data, __u16 size, int timeout);
int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
int ignore_error);
void snd_usb_mixer_disconnect(struct list_head *p);
int snd_usb_create_midi_interface(struct snd_usb_audio *chip, struct usb_interface *iface,
const struct snd_usb_audio_quirk *quirk);
void snd_usbmidi_input_stop(struct list_head* p);
void snd_usbmidi_input_start(struct list_head* p);
void snd_usbmidi_disconnect(struct list_head *p);
/*
* retrieve usb_interface descriptor from the host interface
* (conditional for compatibility with the older API)
*/
#ifndef get_iface_desc
#define get_iface_desc(iface) (&(iface)->desc)
#define get_endpoint(alt,ep) (&(alt)->endpoint[ep].desc)
#define get_ep_desc(ep) (&(ep)->desc)
#define get_cfg_desc(cfg) (&(cfg)->desc)
#endif
#ifndef snd_usb_get_speed
#define snd_usb_get_speed(dev) ((dev)->speed)
#endif
#endif /* __USBAUDIO_H */
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