716 lines
23 KiB
C
716 lines
23 KiB
C
/*
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* QEMU USB audio device
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*
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* written by:
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* H. Peter Anvin <hpa@linux.intel.com>
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* Gerd Hoffmann <kraxel@redhat.com>
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*
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* lousely based on usb net device code which is:
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*
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* Copyright (c) 2006 Thomas Sailer
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* Copyright (c) 2008 Andrzej Zaborowski
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu-common.h"
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#include "usb.h"
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#include "usb-desc.h"
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#include "hw.h"
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#include "audiodev.h"
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#include "audio/audio.h"
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#define USBAUDIO_VENDOR_NUM 0x46f4 /* CRC16() of "QEMU" */
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#define USBAUDIO_PRODUCT_NUM 0x0002
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#define DEV_CONFIG_VALUE 1 /* The one and only */
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/* Descriptor subtypes for AC interfaces */
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#define DST_AC_HEADER 1
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#define DST_AC_INPUT_TERMINAL 2
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#define DST_AC_OUTPUT_TERMINAL 3
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#define DST_AC_FEATURE_UNIT 6
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/* Descriptor subtypes for AS interfaces */
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#define DST_AS_GENERAL 1
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#define DST_AS_FORMAT_TYPE 2
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/* Descriptor subtypes for endpoints */
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#define DST_EP_GENERAL 1
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enum usb_audio_strings {
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STRING_NULL,
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STRING_MANUFACTURER,
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STRING_PRODUCT,
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STRING_SERIALNUMBER,
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STRING_CONFIG,
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STRING_USBAUDIO_CONTROL,
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STRING_INPUT_TERMINAL,
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STRING_FEATURE_UNIT,
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STRING_OUTPUT_TERMINAL,
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STRING_NULL_STREAM,
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STRING_REAL_STREAM,
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};
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static const USBDescStrings usb_audio_stringtable = {
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[STRING_MANUFACTURER] = "QEMU",
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[STRING_PRODUCT] = "QEMU USB Audio",
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[STRING_SERIALNUMBER] = "1",
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[STRING_CONFIG] = "Audio Configuration",
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[STRING_USBAUDIO_CONTROL] = "Audio Device",
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[STRING_INPUT_TERMINAL] = "Audio Output Pipe",
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[STRING_FEATURE_UNIT] = "Audio Output Volume Control",
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[STRING_OUTPUT_TERMINAL] = "Audio Output Terminal",
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[STRING_NULL_STREAM] = "Audio Output - Disabled",
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[STRING_REAL_STREAM] = "Audio Output - 48 kHz Stereo",
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};
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#define U16(x) ((x) & 0xff), (((x) >> 8) & 0xff)
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#define U24(x) U16(x), (((x) >> 16) & 0xff)
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#define U32(x) U24(x), (((x) >> 24) & 0xff)
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/*
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* A Basic Audio Device uses these specific values
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*/
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#define USBAUDIO_PACKET_SIZE 192
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#define USBAUDIO_SAMPLE_RATE 48000
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#define USBAUDIO_PACKET_INTERVAL 1
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static const USBDescIface desc_iface[] = {
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{
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.bInterfaceNumber = 0,
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.bNumEndpoints = 0,
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.bInterfaceClass = USB_CLASS_AUDIO,
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.bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL,
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.bInterfaceProtocol = 0x04,
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.iInterface = STRING_USBAUDIO_CONTROL,
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.ndesc = 4,
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.descs = (USBDescOther[]) {
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{
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/* Headphone Class-Specific AC Interface Header Descriptor */
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.data = (uint8_t[]) {
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0x09, /* u8 bLength */
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USB_DT_CS_INTERFACE, /* u8 bDescriptorType */
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DST_AC_HEADER, /* u8 bDescriptorSubtype */
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U16(0x0100), /* u16 bcdADC */
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U16(0x2b), /* u16 wTotalLength */
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0x01, /* u8 bInCollection */
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0x01, /* u8 baInterfaceNr */
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}
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},{
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/* Generic Stereo Input Terminal ID1 Descriptor */
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.data = (uint8_t[]) {
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0x0c, /* u8 bLength */
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USB_DT_CS_INTERFACE, /* u8 bDescriptorType */
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DST_AC_INPUT_TERMINAL, /* u8 bDescriptorSubtype */
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0x01, /* u8 bTerminalID */
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U16(0x0101), /* u16 wTerminalType */
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0x00, /* u8 bAssocTerminal */
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0x02, /* u16 bNrChannels */
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U16(0x0003), /* u16 wChannelConfig */
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0x00, /* u8 iChannelNames */
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STRING_INPUT_TERMINAL, /* u8 iTerminal */
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}
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},{
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/* Generic Stereo Feature Unit ID2 Descriptor */
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.data = (uint8_t[]) {
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0x0d, /* u8 bLength */
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USB_DT_CS_INTERFACE, /* u8 bDescriptorType */
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DST_AC_FEATURE_UNIT, /* u8 bDescriptorSubtype */
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0x02, /* u8 bUnitID */
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0x01, /* u8 bSourceID */
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0x02, /* u8 bControlSize */
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U16(0x0001), /* u16 bmaControls(0) */
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U16(0x0002), /* u16 bmaControls(1) */
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U16(0x0002), /* u16 bmaControls(2) */
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STRING_FEATURE_UNIT, /* u8 iFeature */
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}
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},{
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/* Headphone Ouptut Terminal ID3 Descriptor */
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.data = (uint8_t[]) {
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0x09, /* u8 bLength */
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USB_DT_CS_INTERFACE, /* u8 bDescriptorType */
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DST_AC_OUTPUT_TERMINAL, /* u8 bDescriptorSubtype */
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0x03, /* u8 bUnitID */
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U16(0x0301), /* u16 wTerminalType (SPK) */
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0x00, /* u8 bAssocTerminal */
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0x02, /* u8 bSourceID */
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STRING_OUTPUT_TERMINAL, /* u8 iTerminal */
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}
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}
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},
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},{
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.bInterfaceNumber = 1,
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.bAlternateSetting = 0,
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.bNumEndpoints = 0,
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.bInterfaceClass = USB_CLASS_AUDIO,
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.bInterfaceSubClass = USB_SUBCLASS_AUDIO_STREAMING,
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.iInterface = STRING_NULL_STREAM,
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},{
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.bInterfaceNumber = 1,
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.bAlternateSetting = 1,
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.bNumEndpoints = 1,
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.bInterfaceClass = USB_CLASS_AUDIO,
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.bInterfaceSubClass = USB_SUBCLASS_AUDIO_STREAMING,
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.iInterface = STRING_REAL_STREAM,
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.ndesc = 2,
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.descs = (USBDescOther[]) {
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{
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/* Headphone Class-specific AS General Interface Descriptor */
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.data = (uint8_t[]) {
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0x07, /* u8 bLength */
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USB_DT_CS_INTERFACE, /* u8 bDescriptorType */
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DST_AS_GENERAL, /* u8 bDescriptorSubtype */
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0x01, /* u8 bTerminalLink */
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0x00, /* u8 bDelay */
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0x01, 0x00, /* u16 wFormatTag */
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}
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},{
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/* Headphone Type I Format Type Descriptor */
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.data = (uint8_t[]) {
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0x0b, /* u8 bLength */
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USB_DT_CS_INTERFACE, /* u8 bDescriptorType */
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DST_AS_FORMAT_TYPE, /* u8 bDescriptorSubtype */
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0x01, /* u8 bFormatType */
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0x02, /* u8 bNrChannels */
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0x02, /* u8 bSubFrameSize */
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0x10, /* u8 bBitResolution */
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0x01, /* u8 bSamFreqType */
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U24(USBAUDIO_SAMPLE_RATE), /* u24 tSamFreq */
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}
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}
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},
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.eps = (USBDescEndpoint[]) {
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{
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.bEndpointAddress = USB_DIR_OUT | 0x01,
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.bmAttributes = 0x0d,
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.wMaxPacketSize = USBAUDIO_PACKET_SIZE,
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.bInterval = 1,
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.is_audio = 1,
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/* Stereo Headphone Class-specific
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AS Audio Data Endpoint Descriptor */
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.extra = (uint8_t[]) {
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0x07, /* u8 bLength */
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USB_DT_CS_ENDPOINT, /* u8 bDescriptorType */
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DST_EP_GENERAL, /* u8 bDescriptorSubtype */
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0x00, /* u8 bmAttributes */
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0x00, /* u8 bLockDelayUnits */
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U16(0x0000), /* u16 wLockDelay */
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},
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},
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}
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}
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};
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static const USBDescDevice desc_device = {
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.bcdUSB = 0x0200,
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.bMaxPacketSize0 = 64,
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.bNumConfigurations = 1,
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.confs = (USBDescConfig[]) {
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{
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.bNumInterfaces = 2,
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.bConfigurationValue = DEV_CONFIG_VALUE,
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.iConfiguration = STRING_CONFIG,
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.bmAttributes = 0xc0,
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.bMaxPower = 0x32,
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.nif = ARRAY_SIZE(desc_iface),
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.ifs = desc_iface,
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},
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},
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};
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static const USBDesc desc_audio = {
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.id = {
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.idVendor = USBAUDIO_VENDOR_NUM,
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.idProduct = USBAUDIO_PRODUCT_NUM,
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.bcdDevice = 0,
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.iManufacturer = STRING_MANUFACTURER,
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.iProduct = STRING_PRODUCT,
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.iSerialNumber = STRING_SERIALNUMBER,
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},
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.full = &desc_device,
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.str = usb_audio_stringtable,
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};
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/*
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* A USB audio device supports an arbitrary number of alternate
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* interface settings for each interface. Each corresponds to a block
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* diagram of parameterized blocks. This can thus refer to things like
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* number of channels, data rates, or in fact completely different
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* block diagrams. Alternative setting 0 is always the null block diagram,
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* which is used by a disabled device.
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*/
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enum usb_audio_altset {
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ALTSET_OFF = 0x00, /* No endpoint */
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ALTSET_ON = 0x01, /* Single endpoint */
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};
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/*
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* Class-specific control requests
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*/
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#define CR_SET_CUR 0x01
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#define CR_GET_CUR 0x81
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#define CR_SET_MIN 0x02
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#define CR_GET_MIN 0x82
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#define CR_SET_MAX 0x03
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#define CR_GET_MAX 0x83
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#define CR_SET_RES 0x04
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#define CR_GET_RES 0x84
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#define CR_SET_MEM 0x05
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#define CR_GET_MEM 0x85
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#define CR_GET_STAT 0xff
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/*
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* Feature Unit Control Selectors
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*/
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#define MUTE_CONTROL 0x01
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#define VOLUME_CONTROL 0x02
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#define BASS_CONTROL 0x03
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#define MID_CONTROL 0x04
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#define TREBLE_CONTROL 0x05
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#define GRAPHIC_EQUALIZER_CONTROL 0x06
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#define AUTOMATIC_GAIN_CONTROL 0x07
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#define DELAY_CONTROL 0x08
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#define BASS_BOOST_CONTROL 0x09
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#define LOUDNESS_CONTROL 0x0a
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/*
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* buffering
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*/
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struct streambuf {
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uint8_t *data;
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uint32_t size;
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uint32_t prod;
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uint32_t cons;
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};
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static void streambuf_init(struct streambuf *buf, uint32_t size)
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{
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g_free(buf->data);
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buf->size = size - (size % USBAUDIO_PACKET_SIZE);
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buf->data = g_malloc(buf->size);
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buf->prod = 0;
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buf->cons = 0;
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}
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static void streambuf_fini(struct streambuf *buf)
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{
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g_free(buf->data);
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buf->data = NULL;
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}
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static int streambuf_put(struct streambuf *buf, USBPacket *p)
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{
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uint32_t free = buf->size - (buf->prod - buf->cons);
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if (!free) {
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return 0;
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}
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assert(free >= USBAUDIO_PACKET_SIZE);
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usb_packet_copy(p, buf->data + (buf->prod % buf->size),
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USBAUDIO_PACKET_SIZE);
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buf->prod += USBAUDIO_PACKET_SIZE;
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return USBAUDIO_PACKET_SIZE;
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}
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static uint8_t *streambuf_get(struct streambuf *buf)
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{
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uint32_t used = buf->prod - buf->cons;
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uint8_t *data;
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if (!used) {
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return NULL;
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}
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assert(used >= USBAUDIO_PACKET_SIZE);
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data = buf->data + (buf->cons % buf->size);
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buf->cons += USBAUDIO_PACKET_SIZE;
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return data;
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}
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typedef struct USBAudioState {
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/* qemu interfaces */
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USBDevice dev;
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QEMUSoundCard card;
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/* state */
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struct {
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enum usb_audio_altset altset;
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struct audsettings as;
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SWVoiceOut *voice;
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bool mute;
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uint8_t vol[2];
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struct streambuf buf;
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} out;
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/* properties */
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uint32_t debug;
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uint32_t buffer;
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} USBAudioState;
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static void output_callback(void *opaque, int avail)
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{
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USBAudioState *s = opaque;
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uint8_t *data;
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for (;;) {
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if (avail < USBAUDIO_PACKET_SIZE) {
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return;
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}
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data = streambuf_get(&s->out.buf);
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if (NULL == data) {
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return;
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}
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AUD_write(s->out.voice, data, USBAUDIO_PACKET_SIZE);
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avail -= USBAUDIO_PACKET_SIZE;
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}
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}
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static int usb_audio_set_output_altset(USBAudioState *s, int altset)
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{
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switch (altset) {
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case ALTSET_OFF:
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streambuf_init(&s->out.buf, s->buffer);
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AUD_set_active_out(s->out.voice, false);
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break;
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case ALTSET_ON:
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AUD_set_active_out(s->out.voice, true);
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break;
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default:
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return -1;
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}
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if (s->debug) {
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fprintf(stderr, "usb-audio: set interface %d\n", altset);
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}
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s->out.altset = altset;
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return 0;
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}
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/*
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* Note: we arbitrarily map the volume control range onto -inf..+8 dB
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*/
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#define ATTRIB_ID(cs, attrib, idif) \
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(((cs) << 24) | ((attrib) << 16) | (idif))
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static int usb_audio_get_control(USBAudioState *s, uint8_t attrib,
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uint16_t cscn, uint16_t idif,
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int length, uint8_t *data)
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{
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uint8_t cs = cscn >> 8;
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uint8_t cn = cscn - 1; /* -1 for the non-present master control */
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uint32_t aid = ATTRIB_ID(cs, attrib, idif);
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int ret = USB_RET_STALL;
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switch (aid) {
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case ATTRIB_ID(MUTE_CONTROL, CR_GET_CUR, 0x0200):
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data[0] = s->out.mute;
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ret = 1;
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break;
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case ATTRIB_ID(VOLUME_CONTROL, CR_GET_CUR, 0x0200):
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if (cn < 2) {
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uint16_t vol = (s->out.vol[cn] * 0x8800 + 127) / 255 + 0x8000;
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data[0] = vol;
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data[1] = vol >> 8;
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ret = 2;
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}
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break;
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case ATTRIB_ID(VOLUME_CONTROL, CR_GET_MIN, 0x0200):
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if (cn < 2) {
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data[0] = 0x01;
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data[1] = 0x80;
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ret = 2;
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}
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break;
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case ATTRIB_ID(VOLUME_CONTROL, CR_GET_MAX, 0x0200):
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if (cn < 2) {
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data[0] = 0x00;
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data[1] = 0x08;
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ret = 2;
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}
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break;
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case ATTRIB_ID(VOLUME_CONTROL, CR_GET_RES, 0x0200):
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if (cn < 2) {
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data[0] = 0x88;
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data[1] = 0x00;
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ret = 2;
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}
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break;
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}
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return ret;
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}
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static int usb_audio_set_control(USBAudioState *s, uint8_t attrib,
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uint16_t cscn, uint16_t idif,
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int length, uint8_t *data)
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{
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uint8_t cs = cscn >> 8;
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uint8_t cn = cscn - 1; /* -1 for the non-present master control */
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uint32_t aid = ATTRIB_ID(cs, attrib, idif);
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int ret = USB_RET_STALL;
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bool set_vol = false;
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switch (aid) {
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case ATTRIB_ID(MUTE_CONTROL, CR_SET_CUR, 0x0200):
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s->out.mute = data[0] & 1;
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set_vol = true;
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ret = 0;
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break;
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case ATTRIB_ID(VOLUME_CONTROL, CR_SET_CUR, 0x0200):
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if (cn < 2) {
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uint16_t vol = data[0] + (data[1] << 8);
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if (s->debug) {
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fprintf(stderr, "usb-audio: vol %04x\n", (uint16_t)vol);
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}
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vol -= 0x8000;
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vol = (vol * 255 + 0x4400) / 0x8800;
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if (vol > 255) {
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vol = 255;
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}
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s->out.vol[cn] = vol;
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set_vol = true;
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ret = 0;
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}
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break;
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}
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if (set_vol) {
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if (s->debug) {
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fprintf(stderr, "usb-audio: mute %d, lvol %3d, rvol %3d\n",
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s->out.mute, s->out.vol[0], s->out.vol[1]);
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}
|
|
AUD_set_volume_out(s->out.voice, s->out.mute,
|
|
s->out.vol[0], s->out.vol[1]);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int usb_audio_handle_control(USBDevice *dev, USBPacket *p,
|
|
int request, int value, int index,
|
|
int length, uint8_t *data)
|
|
{
|
|
USBAudioState *s = DO_UPCAST(USBAudioState, dev, dev);
|
|
int ret = 0;
|
|
|
|
if (s->debug) {
|
|
fprintf(stderr, "usb-audio: control transaction: "
|
|
"request 0x%04x value 0x%04x index 0x%04x length 0x%04x\n",
|
|
request, value, index, length);
|
|
}
|
|
|
|
ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
|
|
if (ret >= 0) {
|
|
return ret;
|
|
}
|
|
|
|
switch (request) {
|
|
case ClassInterfaceRequest | CR_GET_CUR:
|
|
case ClassInterfaceRequest | CR_GET_MIN:
|
|
case ClassInterfaceRequest | CR_GET_MAX:
|
|
case ClassInterfaceRequest | CR_GET_RES:
|
|
ret = usb_audio_get_control(s, request & 0xff, value, index,
|
|
length, data);
|
|
if (ret < 0) {
|
|
if (s->debug) {
|
|
fprintf(stderr, "usb-audio: fail: get control\n");
|
|
}
|
|
goto fail;
|
|
}
|
|
break;
|
|
|
|
case ClassInterfaceOutRequest | CR_SET_CUR:
|
|
case ClassInterfaceOutRequest | CR_SET_MIN:
|
|
case ClassInterfaceOutRequest | CR_SET_MAX:
|
|
case ClassInterfaceOutRequest | CR_SET_RES:
|
|
ret = usb_audio_set_control(s, request & 0xff, value, index,
|
|
length, data);
|
|
if (ret < 0) {
|
|
if (s->debug) {
|
|
fprintf(stderr, "usb-audio: fail: set control\n");
|
|
}
|
|
goto fail;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
fail:
|
|
if (s->debug) {
|
|
fprintf(stderr, "usb-audio: failed control transaction: "
|
|
"request 0x%04x value 0x%04x index 0x%04x length 0x%04x\n",
|
|
request, value, index, length);
|
|
}
|
|
ret = USB_RET_STALL;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void usb_audio_set_interface(USBDevice *dev, int iface,
|
|
int old, int value)
|
|
{
|
|
USBAudioState *s = DO_UPCAST(USBAudioState, dev, dev);
|
|
|
|
if (iface == 1) {
|
|
usb_audio_set_output_altset(s, value);
|
|
}
|
|
}
|
|
|
|
static void usb_audio_handle_reset(USBDevice *dev)
|
|
{
|
|
USBAudioState *s = DO_UPCAST(USBAudioState, dev, dev);
|
|
|
|
if (s->debug) {
|
|
fprintf(stderr, "usb-audio: reset\n");
|
|
}
|
|
usb_audio_set_output_altset(s, ALTSET_OFF);
|
|
}
|
|
|
|
static int usb_audio_handle_dataout(USBAudioState *s, USBPacket *p)
|
|
{
|
|
int rc;
|
|
|
|
if (s->out.altset == ALTSET_OFF) {
|
|
return USB_RET_STALL;
|
|
}
|
|
|
|
rc = streambuf_put(&s->out.buf, p);
|
|
if (rc < p->iov.size && s->debug > 1) {
|
|
fprintf(stderr, "usb-audio: output overrun (%zd bytes)\n",
|
|
p->iov.size - rc);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int usb_audio_handle_data(USBDevice *dev, USBPacket *p)
|
|
{
|
|
USBAudioState *s = (USBAudioState *) dev;
|
|
int ret = 0;
|
|
|
|
switch (p->pid) {
|
|
case USB_TOKEN_OUT:
|
|
switch (p->devep) {
|
|
case 1:
|
|
ret = usb_audio_handle_dataout(s, p);
|
|
break;
|
|
default:
|
|
goto fail;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
fail:
|
|
ret = USB_RET_STALL;
|
|
break;
|
|
}
|
|
if (ret == USB_RET_STALL && s->debug) {
|
|
fprintf(stderr, "usb-audio: failed data transaction: "
|
|
"pid 0x%x ep 0x%x len 0x%zx\n",
|
|
p->pid, p->devep, p->iov.size);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void usb_audio_handle_destroy(USBDevice *dev)
|
|
{
|
|
USBAudioState *s = DO_UPCAST(USBAudioState, dev, dev);
|
|
|
|
if (s->debug) {
|
|
fprintf(stderr, "usb-audio: destroy\n");
|
|
}
|
|
|
|
usb_audio_set_output_altset(s, ALTSET_OFF);
|
|
AUD_close_out(&s->card, s->out.voice);
|
|
AUD_remove_card(&s->card);
|
|
|
|
streambuf_fini(&s->out.buf);
|
|
}
|
|
|
|
static int usb_audio_initfn(USBDevice *dev)
|
|
{
|
|
USBAudioState *s = DO_UPCAST(USBAudioState, dev, dev);
|
|
|
|
usb_desc_init(dev);
|
|
s->dev.opaque = s;
|
|
AUD_register_card("usb-audio", &s->card);
|
|
|
|
s->out.altset = ALTSET_OFF;
|
|
s->out.mute = false;
|
|
s->out.vol[0] = 240; /* 0 dB */
|
|
s->out.vol[1] = 240; /* 0 dB */
|
|
s->out.as.freq = USBAUDIO_SAMPLE_RATE;
|
|
s->out.as.nchannels = 2;
|
|
s->out.as.fmt = AUD_FMT_S16;
|
|
s->out.as.endianness = 0;
|
|
streambuf_init(&s->out.buf, s->buffer);
|
|
|
|
s->out.voice = AUD_open_out(&s->card, s->out.voice, "usb-audio",
|
|
s, output_callback, &s->out.as);
|
|
AUD_set_volume_out(s->out.voice, s->out.mute, s->out.vol[0], s->out.vol[1]);
|
|
AUD_set_active_out(s->out.voice, 0);
|
|
return 0;
|
|
}
|
|
|
|
static const VMStateDescription vmstate_usb_audio = {
|
|
.name = "usb-audio",
|
|
.unmigratable = 1,
|
|
};
|
|
|
|
static Property usb_audio_properties[] = {
|
|
DEFINE_PROP_UINT32("debug", USBAudioState, debug, 0),
|
|
DEFINE_PROP_UINT32("buffer", USBAudioState, buffer,
|
|
8 * USBAUDIO_PACKET_SIZE),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void usb_audio_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
USBDeviceClass *k = USB_DEVICE_CLASS(klass);
|
|
|
|
dc->vmsd = &vmstate_usb_audio;
|
|
dc->props = usb_audio_properties;
|
|
k->product_desc = "QEMU USB Audio Interface";
|
|
k->usb_desc = &desc_audio;
|
|
k->init = usb_audio_initfn;
|
|
k->handle_packet = usb_generic_handle_packet;
|
|
k->handle_reset = usb_audio_handle_reset;
|
|
k->handle_control = usb_audio_handle_control;
|
|
k->handle_data = usb_audio_handle_data;
|
|
k->handle_destroy = usb_audio_handle_destroy;
|
|
k->set_interface = usb_audio_set_interface;
|
|
}
|
|
|
|
static TypeInfo usb_audio_info = {
|
|
.name = "usb-audio",
|
|
.parent = TYPE_USB_DEVICE,
|
|
.instance_size = sizeof(USBAudioState),
|
|
.class_init = usb_audio_class_init,
|
|
};
|
|
|
|
static void usb_audio_register_devices(void)
|
|
{
|
|
type_register_static(&usb_audio_info);
|
|
usb_legacy_register("usb-audio", "audio", NULL);
|
|
}
|
|
|
|
device_init(usb_audio_register_devices)
|