| /* | |
| * <linux/usb/audio.h> -- USB Audio definitions. | |
| * | |
| * Copyright (C) 2006 Thumtronics Pty Ltd. | |
| * Developed for Thumtronics by Grey Innovation | |
| * Ben Williamson <ben.williamson@greyinnovation.com> | |
| * | |
| * This software is distributed under the terms of the GNU General Public | |
| * License ("GPL") version 2, as published by the Free Software Foundation. | |
| * | |
| * This file holds USB constants and structures defined | |
| * by the USB Device Class Definition for Audio Devices. | |
| * Comments below reference relevant sections of that document: | |
| * | |
| * http://www.usb.org/developers/devclass_docs/audio10.pdf | |
| */ | |
| #ifndef __LINUX_USB_AUDIO_H | |
| #define __LINUX_USB_AUDIO_H | |
| #include <linux/types.h> | |
| /* A.2 Audio Interface Subclass Codes */ | |
| #define USB_SUBCLASS_AUDIOCONTROL 0x01 | |
| #define USB_SUBCLASS_AUDIOSTREAMING 0x02 | |
| #define USB_SUBCLASS_MIDISTREAMING 0x03 | |
| /* 4.3.2 Class-Specific AC Interface Descriptor */ | |
| struct usb_ac_header_descriptor { | |
| __u8 bLength; /* 8+n */ | |
| __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ | |
| __u8 bDescriptorSubtype; /* USB_MS_HEADER */ | |
| __le16 bcdADC; /* 0x0100 */ | |
| __le16 wTotalLength; /* includes Unit and Terminal desc. */ | |
| __u8 bInCollection; /* n */ | |
| __u8 baInterfaceNr[]; /* [n] */ | |
| } __attribute__ ((packed)); | |
| #define USB_DT_AC_HEADER_SIZE(n) (8+(n)) | |
| /* As above, but more useful for defining your own descriptors: */ | |
| #define DECLARE_USB_AC_HEADER_DESCRIPTOR(n) \ | |
| struct usb_ac_header_descriptor_##n { \ | |
| __u8 bLength; \ | |
| __u8 bDescriptorType; \ | |
| __u8 bDescriptorSubtype; \ | |
| __le16 bcdADC; \ | |
| __le16 wTotalLength; \ | |
| __u8 bInCollection; \ | |
| __u8 baInterfaceNr[n]; \ | |
| } __attribute__ ((packed)) | |
| #endif /* __LINUX_USB_AUDIO_H */ |