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| author | Jeff Garzik <jeff@garzik.org> | 2006-09-27 18:16:47 -0400 |
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| committer | Jeff Garzik <jeff@garzik.org> | 2006-09-27 18:16:47 -0400 |
| commit | 3b9f6cb8a1ec791be79c6c7595fea922f12d1e64 (patch) | |
| tree | 2393a448add846e6c2ed12f68106c3018b72c6a9 /include/linux/usb/audio.h | |
| parent | c38778c3a9aeadcd1ee319cfc8ea5a9cbf8cdafa (diff) | |
| parent | a77c64c1a641950626181b4857abb701d8f38ccc (diff) | |
| download | linux-3b9f6cb8a1ec791be79c6c7595fea922f12d1e64.tar.gz linux-3b9f6cb8a1ec791be79c6c7595fea922f12d1e64.tar.bz2 linux-3b9f6cb8a1ec791be79c6c7595fea922f12d1e64.zip | |
Merge branch 'master' into upstream
Diffstat (limited to 'include/linux/usb/audio.h')
| -rw-r--r-- | include/linux/usb/audio.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/include/linux/usb/audio.h b/include/linux/usb/audio.h new file mode 100644 index 000000000000..6bd235994dc2 --- /dev/null +++ b/include/linux/usb/audio.h @@ -0,0 +1,53 @@ +/* + * <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 |