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midi.h
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * <linux/usb/midi.h> -- USB MIDI 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 MIDI Devices. * Comments below reference relevant sections of that document: * * http://www.usb.org/developers/devclass_docs/midi10.pdf */ #ifndef __LINUX_USB_MIDI_H #define __LINUX_USB_MIDI_H #include <linux/types.h> /* A.1 MS Class-Specific Interface Descriptor Subtypes */ #define USB_MS_HEADER 0x01 #define USB_MS_MIDI_IN_JACK 0x02 #define USB_MS_MIDI_OUT_JACK 0x03 #define USB_MS_ELEMENT 0x04 /* A.2 MS Class-Specific Endpoint Descriptor Subtypes */ #define USB_MS_GENERAL 0x01 /* A.3 MS MIDI IN and OUT Jack Types */ #define USB_MS_EMBEDDED 0x01 #define USB_MS_EXTERNAL 0x02 /* 6.1.2.1 Class-Specific MS Interface Header Descriptor */ struct usb_ms_header_descriptor { __u8 bLength; __u8 bDescriptorType; __u8 bDescriptorSubtype; __le16 bcdMSC; __le16 wTotalLength; } __attribute__ ((packed)); #define USB_DT_MS_HEADER_SIZE 7 /* 6.1.2.2 MIDI IN Jack Descriptor */ struct usb_midi_in_jack_descriptor { __u8 bLength; __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ __u8 bDescriptorSubtype; /* USB_MS_MIDI_IN_JACK */ __u8 bJackType; /* USB_MS_EMBEDDED/EXTERNAL */ __u8 bJackID; __u8 iJack; } __attribute__ ((packed)); #define USB_DT_MIDI_IN_SIZE 6 struct usb_midi_source_pin { __u8 baSourceID; __u8 baSourcePin; } __attribute__ ((packed)); /* 6.1.2.3 MIDI OUT Jack Descriptor */ struct usb_midi_out_jack_descriptor { __u8 bLength; __u8 bDescriptorType; /* USB_DT_CS_INTERFACE */ __u8 bDescriptorSubtype; /* USB_MS_MIDI_OUT_JACK */ __u8 bJackType; /* USB_MS_EMBEDDED/EXTERNAL */ __u8 bJackID; __u8 bNrInputPins; /* p */ struct usb_midi_source_pin pins[]; /* [p] */ /*__u8 iJack; -- omitted due to variable-sized pins[] */ } __attribute__ ((packed)); #define USB_DT_MIDI_OUT_SIZE(p) (7 + 2 * (p)) /* As above, but more useful for defining your own descriptors: */ #define DECLARE_USB_MIDI_OUT_JACK_DESCRIPTOR(p) \ struct usb_midi_out_jack_descriptor_##p { \ __u8 bLength; \ __u8 bDescriptorType; \ __u8 bDescriptorSubtype; \ __u8 bJackType; \ __u8 bJackID; \ __u8 bNrInputPins; \ struct usb_midi_source_pin pins[p]; \ __u8 iJack; \ } __attribute__ ((packed)) /* 6.2.2 Class-Specific MS Bulk Data Endpoint Descriptor */ struct usb_ms_endpoint_descriptor { __u8 bLength; /* 4+n */ __u8 bDescriptorType; /* USB_DT_CS_ENDPOINT */ __u8 bDescriptorSubtype; /* USB_MS_GENERAL */ __u8 bNumEmbMIDIJack; /* n */ __u8 baAssocJackID[]; /* [n] */ } __attribute__ ((packed)); #define USB_DT_MS_ENDPOINT_SIZE(n) (4 + (n)) /* As above, but more useful for defining your own descriptors: */ #define DECLARE_USB_MS_ENDPOINT_DESCRIPTOR(n) \ struct usb_ms_endpoint_descriptor_##n { \ __u8 bLength; \ __u8 bDescriptorType; \ __u8 bDescriptorSubtype; \ __u8 bNumEmbMIDIJack; \ __u8 baAssocJackID[n]; \ } __attribute__ ((packed)) #endif /* __LINUX_USB_MIDI_H */
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