// SPDX-License-Identifier: GPL-2.0+
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/*
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* f_uac1.c -- USB Audio Class 1.0 Function (using u_audio API)
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*
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* Copyright (C) 2016 Ruslan Bilovol <ruslan.bilovol@gmail.com>
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* Copyright (C) 2017 Julian Scheel <julian@jusst.de>
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*
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* This driver doesn't expect any real Audio codec to be present
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* on the device - the audio streams are simply sinked to and
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* sourced from a virtual ALSA sound card created.
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*
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* This file is based on f_uac1.c which is
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* Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
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* Copyright (C) 2008 Analog Devices, Inc
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*/
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#include <linux/usb/audio.h>
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#include <linux/module.h>
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#include "u_audio.h"
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#include "u_uac.h"
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/* UAC1 spec: 3.7.2.3 Audio Channel Cluster Format */
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#define UAC1_CHANNEL_MASK 0x0FFF
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/*
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* DESCRIPTORS ... most are static, but strings and full
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* configuration descriptors are built on demand.
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*/
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/*
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* We have three interfaces - one AudioControl and two AudioStreaming
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*
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* The driver implements a simple UAC_1 topology.
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* USB-OUT -> IT_1 -> OT_2 -> ALSA_Capture
|
* ALSA_Playback -> IT_3 -> OT_4 -> USB-IN
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*/
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#define F_AUDIO_AC_INTERFACE 0
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#define F_AUDIO_AS_OUT_INTERFACE 1
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#define F_AUDIO_AS_IN_INTERFACE 2
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/* Number of streaming interfaces */
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#define F_AUDIO_NUM_INTERFACES 2
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static struct usb_interface_assoc_descriptor iad_desc = {
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.bLength = sizeof(iad_desc),
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.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
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.bFirstInterface = 0,
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.bFunctionClass = USB_CLASS_AUDIO,
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.bFunctionSubClass = USB_SUBCLASS_AUDIOSTREAMING,
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.bFunctionProtocol = UAC_VERSION_1,
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};
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/* B.3.1 Standard AC Interface Descriptor */
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static struct usb_interface_descriptor ac_interface_desc = {
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.bLength = USB_DT_INTERFACE_SIZE,
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.bDescriptorType = USB_DT_INTERFACE,
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.bNumEndpoints = 0,
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.bInterfaceClass = USB_CLASS_AUDIO,
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.bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL,
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};
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/*
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* The number of AudioStreaming and MIDIStreaming interfaces
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* in the Audio Interface Collection
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*/
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DECLARE_UAC_AC_HEADER_DESCRIPTOR(2);
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/* B.3.2 Class-Specific AC Interface Descriptor */
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static struct uac1_ac_header_descriptor_2 ac_header_desc = {
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_HEADER,
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.bcdADC = cpu_to_le16(0x0100),
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/* .baInterfaceNr[0] = DYNAMIC */
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/* .baInterfaceNr[1] = DYNAMIC */
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};
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static struct uac_input_terminal_descriptor usb_out_it_desc = {
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.bLength = UAC_DT_INPUT_TERMINAL_SIZE,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_INPUT_TERMINAL,
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.wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING),
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.bAssocTerminal = 0,
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.wChannelConfig = cpu_to_le16(0x3),
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};
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DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(0);
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static struct uac_feature_unit_descriptor_0 io_out_ot_fu_desc = {
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.bLength = UAC_DT_FEATURE_UNIT_SIZE(0),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_FEATURE_UNIT,
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.bControlSize = 2,
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.bmaControls[0] = (UAC_CONTROL_BIT(UAC_FU_MUTE) |
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UAC_CONTROL_BIT(UAC_FU_VOLUME)),
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};
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static struct usb_audio_control c_mute_control = {
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.list = LIST_HEAD_INIT(c_mute_control.list),
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.name = "Capture Mute",
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.type = UAC_FU_MUTE,
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.set = u_audio_fu_set_cmd,
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.get = u_audio_fu_get_cmd,
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};
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static struct usb_audio_control c_volume_control = {
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.list = LIST_HEAD_INIT(c_volume_control.list),
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.name = "Capture Volume",
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.type = UAC_FU_VOLUME,
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.set = u_audio_fu_set_cmd,
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.get = u_audio_fu_get_cmd,
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};
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static struct usb_audio_control_selector c_feature_unit = {
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.list = LIST_HEAD_INIT(c_feature_unit.list),
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.name = "Capture Mute & Volume Control",
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.type = UAC_FEATURE_UNIT,
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.desc = (struct usb_descriptor_header *)&io_out_ot_fu_desc,
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};
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static struct uac1_output_terminal_descriptor io_out_ot_desc = {
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.bLength = UAC_DT_OUTPUT_TERMINAL_SIZE,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
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.wTerminalType = cpu_to_le16(UAC_OUTPUT_TERMINAL_SPEAKER),
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.bAssocTerminal = 0,
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};
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static struct uac_input_terminal_descriptor io_in_it_desc = {
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.bLength = UAC_DT_INPUT_TERMINAL_SIZE,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_INPUT_TERMINAL,
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.wTerminalType = cpu_to_le16(UAC_INPUT_TERMINAL_MICROPHONE),
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.bAssocTerminal = 0,
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.wChannelConfig = cpu_to_le16(0x3),
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};
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static struct uac_feature_unit_descriptor_0 usb_in_ot_fu_desc = {
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.bLength = UAC_DT_FEATURE_UNIT_SIZE(0),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_FEATURE_UNIT,
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.bControlSize = 2,
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.bmaControls[0] = (UAC_FU_MUTE | UAC_FU_VOLUME),
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};
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static struct usb_audio_control p_mute_control = {
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.list = LIST_HEAD_INIT(p_mute_control.list),
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.name = "Playback Mute",
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.type = UAC_FU_MUTE,
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.set = u_audio_fu_set_cmd,
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.get = u_audio_fu_get_cmd,
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};
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static struct usb_audio_control p_volume_control = {
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.list = LIST_HEAD_INIT(p_volume_control.list),
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.name = "Playback Volume",
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.type = UAC_FU_VOLUME,
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.set = u_audio_fu_set_cmd,
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.get = u_audio_fu_get_cmd,
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};
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static struct usb_audio_control_selector p_feature_unit = {
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.list = LIST_HEAD_INIT(p_feature_unit.list),
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.name = "Playback Mute & Volume Control",
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.type = UAC_FEATURE_UNIT,
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.desc = (struct usb_descriptor_header *)&usb_in_ot_fu_desc,
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};
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static struct uac1_output_terminal_descriptor usb_in_ot_desc = {
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.bLength = UAC_DT_OUTPUT_TERMINAL_SIZE,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
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.wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING),
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.bAssocTerminal = 0,
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};
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/* B.4.1 Standard AS Interface Descriptor */
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static struct usb_interface_descriptor as_out_interface_alt_0_desc = {
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.bLength = USB_DT_INTERFACE_SIZE,
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.bDescriptorType = USB_DT_INTERFACE,
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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_AUDIOSTREAMING,
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};
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static struct usb_interface_descriptor as_out_interface_alt_1_desc = {
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.bLength = USB_DT_INTERFACE_SIZE,
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.bDescriptorType = USB_DT_INTERFACE,
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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_AUDIOSTREAMING,
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};
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static struct usb_interface_descriptor as_in_interface_alt_0_desc = {
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.bLength = USB_DT_INTERFACE_SIZE,
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.bDescriptorType = USB_DT_INTERFACE,
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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_AUDIOSTREAMING,
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};
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static struct usb_interface_descriptor as_in_interface_alt_1_desc = {
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.bLength = USB_DT_INTERFACE_SIZE,
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.bDescriptorType = USB_DT_INTERFACE,
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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_AUDIOSTREAMING,
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};
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/* B.4.2 Class-Specific AS Interface Descriptor */
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static struct uac1_as_header_descriptor as_out_header_desc = {
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.bLength = UAC_DT_AS_HEADER_SIZE,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_AS_GENERAL,
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.bDelay = 1,
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.wFormatTag = cpu_to_le16(UAC_FORMAT_TYPE_I_PCM),
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};
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static struct uac1_as_header_descriptor as_in_header_desc = {
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.bLength = UAC_DT_AS_HEADER_SIZE,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_AS_GENERAL,
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.bDelay = 1,
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.wFormatTag = cpu_to_le16(UAC_FORMAT_TYPE_I_PCM),
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};
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DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(UAC_MAX_RATES);
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#define uac_format_type_i_discrete_descriptor \
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uac_format_type_i_discrete_descriptor_##UAC_MAX_RATES
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static struct uac_format_type_i_discrete_descriptor as_out_type_i_desc = {
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.bLength = 0, /* filled on rate setup */
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_FORMAT_TYPE,
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.bFormatType = UAC_FORMAT_TYPE_I,
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.bSubframeSize = 2,
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.bBitResolution = 16,
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.bSamFreqType = 0, /* filled on rate setup */
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};
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/* Standard ISO OUT Endpoint Descriptor */
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static struct usb_endpoint_descriptor as_out_ep_desc = {
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.bLength = USB_DT_ENDPOINT_AUDIO_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_OUT,
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.bmAttributes = USB_ENDPOINT_SYNC_ADAPTIVE
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| USB_ENDPOINT_XFER_ISOC,
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/* .wMaxPacketSize = DYNAMIC */
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.bInterval = 4,
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};
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static struct usb_endpoint_descriptor ss_out_ep_desc = {
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.bLength = USB_DT_ENDPOINT_AUDIO_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_OUT,
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.bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ADAPTIVE,
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/* .wMaxPacketSize = DYNAMIC */
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.bInterval = 4,
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};
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static struct usb_ss_ep_comp_descriptor ss_out_ep_desc_comp = {
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.bLength = sizeof(ss_out_ep_desc_comp),
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.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
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.bMaxBurst = 0,
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.bmAttributes = 0,
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/* wBytesPerInterval = DYNAMIC */
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};
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/* Class-specific AS ISO OUT Endpoint Descriptor */
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static struct uac_iso_endpoint_descriptor as_iso_out_desc = {
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.bLength = UAC_ISO_ENDPOINT_DESC_SIZE,
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.bDescriptorType = USB_DT_CS_ENDPOINT,
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.bDescriptorSubtype = UAC_EP_GENERAL,
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.bmAttributes = 1,
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.bLockDelayUnits = 1,
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.wLockDelay = cpu_to_le16(1),
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};
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static struct uac_format_type_i_discrete_descriptor as_in_type_i_desc = {
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.bLength = 0, /* filled on rate setup */
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_FORMAT_TYPE,
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.bFormatType = UAC_FORMAT_TYPE_I,
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.bSubframeSize = 2,
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.bBitResolution = 16,
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.bSamFreqType = 0, /* filled on rate setup */
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};
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/* Standard ISO OUT Endpoint Descriptor */
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static struct usb_endpoint_descriptor as_in_ep_desc = {
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.bLength = USB_DT_ENDPOINT_AUDIO_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_IN,
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.bmAttributes = USB_ENDPOINT_SYNC_ASYNC
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| USB_ENDPOINT_XFER_ISOC,
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/* .wMaxPacketSize = DYNAMIC */
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.bInterval = 4,
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};
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static struct usb_endpoint_descriptor ss_in_ep_desc = {
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.bLength = USB_DT_ENDPOINT_AUDIO_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_IN,
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.bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
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/* .wMaxPacketSize = DYNAMIC */
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.bInterval = 4,
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};
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static struct usb_ss_ep_comp_descriptor ss_in_ep_desc_comp = {
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.bLength = sizeof(ss_in_ep_desc_comp),
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.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
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.bMaxBurst = 0,
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.bmAttributes = 0,
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/* wBytesPerInterval = DYNAMIC */
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};
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/* Class-specific AS ISO OUT Endpoint Descriptor */
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static struct uac_iso_endpoint_descriptor as_iso_in_desc = {
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.bLength = UAC_ISO_ENDPOINT_DESC_SIZE,
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.bDescriptorType = USB_DT_CS_ENDPOINT,
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.bDescriptorSubtype = UAC_EP_GENERAL,
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.bmAttributes = 1,
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.bLockDelayUnits = 0,
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.wLockDelay = 0,
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};
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static struct usb_descriptor_header *f_audio_desc[] = {
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(struct usb_descriptor_header *)&iad_desc,
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(struct usb_descriptor_header *)&ac_interface_desc,
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(struct usb_descriptor_header *)&ac_header_desc,
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(struct usb_descriptor_header *)&usb_out_it_desc,
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(struct usb_descriptor_header *)&io_out_ot_fu_desc,
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(struct usb_descriptor_header *)&io_out_ot_desc,
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(struct usb_descriptor_header *)&io_in_it_desc,
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(struct usb_descriptor_header *)&usb_in_ot_fu_desc,
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(struct usb_descriptor_header *)&usb_in_ot_desc,
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(struct usb_descriptor_header *)&as_out_interface_alt_0_desc,
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(struct usb_descriptor_header *)&as_out_interface_alt_1_desc,
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(struct usb_descriptor_header *)&as_out_header_desc,
|
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(struct usb_descriptor_header *)&as_out_type_i_desc,
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(struct usb_descriptor_header *)&as_out_ep_desc,
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(struct usb_descriptor_header *)&as_iso_out_desc,
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(struct usb_descriptor_header *)&as_in_interface_alt_0_desc,
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(struct usb_descriptor_header *)&as_in_interface_alt_1_desc,
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(struct usb_descriptor_header *)&as_in_header_desc,
|
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(struct usb_descriptor_header *)&as_in_type_i_desc,
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(struct usb_descriptor_header *)&as_in_ep_desc,
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(struct usb_descriptor_header *)&as_iso_in_desc,
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NULL,
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};
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static struct usb_descriptor_header *f_ss_audio_desc[] = {
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(struct usb_descriptor_header *)&iad_desc,
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(struct usb_descriptor_header *)&ac_interface_desc,
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(struct usb_descriptor_header *)&ac_header_desc,
|
|
(struct usb_descriptor_header *)&usb_out_it_desc,
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(struct usb_descriptor_header *)&io_out_ot_fu_desc,
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(struct usb_descriptor_header *)&io_out_ot_desc,
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(struct usb_descriptor_header *)&io_in_it_desc,
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(struct usb_descriptor_header *)&usb_in_ot_fu_desc,
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(struct usb_descriptor_header *)&usb_in_ot_desc,
|
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(struct usb_descriptor_header *)&as_out_interface_alt_0_desc,
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(struct usb_descriptor_header *)&as_out_interface_alt_1_desc,
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(struct usb_descriptor_header *)&as_out_header_desc,
|
|
(struct usb_descriptor_header *)&as_out_type_i_desc,
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(struct usb_descriptor_header *)&ss_out_ep_desc,
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(struct usb_descriptor_header *)&ss_out_ep_desc_comp,
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(struct usb_descriptor_header *)&as_iso_out_desc,
|
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(struct usb_descriptor_header *)&as_in_interface_alt_0_desc,
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(struct usb_descriptor_header *)&as_in_interface_alt_1_desc,
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(struct usb_descriptor_header *)&as_in_header_desc,
|
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(struct usb_descriptor_header *)&as_in_type_i_desc,
|
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(struct usb_descriptor_header *)&ss_in_ep_desc,
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(struct usb_descriptor_header *)&ss_in_ep_desc_comp,
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(struct usb_descriptor_header *)&as_iso_in_desc,
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NULL,
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};
|
|
enum {
|
STR_ASSOC,
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STR_AC_IF,
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STR_USB_OUT_IT,
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STR_USB_OUT_IT_CH_NAMES,
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STR_IO_OUT_OT_FU,
|
STR_IO_OUT_OT,
|
STR_IO_IN_IT,
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STR_IO_IN_IT_CH_NAMES,
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STR_USB_IN_OT_FU,
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STR_USB_IN_OT,
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STR_AS_OUT_IF_ALT0,
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STR_AS_OUT_IF_ALT1,
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STR_AS_IN_IF_ALT0,
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STR_AS_IN_IF_ALT1,
|
};
|
|
static struct usb_string strings_uac1[] = {
|
[STR_ASSOC].s = "Source/Sink",
|
[STR_AC_IF].s = "AC Interface",
|
[STR_USB_OUT_IT].s = "Playback Input terminal",
|
[STR_USB_OUT_IT_CH_NAMES].s = "Playback Channels",
|
[STR_IO_OUT_OT_FU].s = "Playback Feature Unit",
|
[STR_IO_OUT_OT].s = "Playback Output terminal",
|
[STR_IO_IN_IT].s = "Capture Input terminal",
|
[STR_IO_IN_IT_CH_NAMES].s = "Capture Channels",
|
[STR_USB_IN_OT_FU].s = "Capture Feature Unit",
|
[STR_USB_IN_OT].s = "Capture Output terminal",
|
[STR_AS_OUT_IF_ALT0].s = "Playback Inactive",
|
[STR_AS_OUT_IF_ALT1].s = "Playback Active",
|
[STR_AS_IN_IF_ALT0].s = "Capture Inactive",
|
[STR_AS_IN_IF_ALT1].s = "Capture Active",
|
{ },
|
};
|
|
static struct usb_gadget_strings str_uac1 = {
|
.language = 0x0409, /* en-us */
|
.strings = strings_uac1,
|
};
|
|
static struct usb_gadget_strings *uac1_strings[] = {
|
&str_uac1,
|
NULL,
|
};
|
|
/*
|
* This function is an ALSA sound card following USB Audio Class Spec 1.0.
|
*/
|
static void intf_complete(struct usb_ep *ep, struct usb_request *req)
|
{
|
struct f_uac *uac1 = req->context;
|
int status = req->status;
|
u32 data = 0;
|
|
switch (status) {
|
case 0: /* normal completion? */
|
if (uac1->set_con) {
|
memcpy(&data, req->buf, req->length);
|
uac1->set_con->set(uac1->set_con, uac1->set_cmd,
|
le16_to_cpu(data));
|
uac1->set_con = NULL;
|
}
|
break;
|
default:
|
break;
|
}
|
}
|
|
static void uac_cs_attr_sample_rate(struct usb_ep *ep, struct usb_request *req)
|
{
|
struct usb_function *fn = ep->driver_data;
|
struct usb_composite_dev *cdev = fn->config->cdev;
|
struct g_audio *agdev = func_to_g_audio(fn);
|
struct f_uac *uac1 = func_to_uac(fn);
|
struct f_uac_opts *opts = g_audio_to_uac_opts(agdev);
|
u8 *buf = (u8 *)req->buf;
|
u32 val = 0;
|
|
if (req->actual != 3) {
|
WARN(cdev, "Invalid data size for UAC_EP_CS_ATTR_SAMPLE_RATE.\n");
|
return;
|
}
|
|
val = buf[0] | (buf[1] << 8) | (buf[2] << 16);
|
|
if (EPIN_EN(opts) && uac1->ctl_id == agdev->in_ep->address) {
|
opts->p_srate_active = val;
|
u_audio_set_playback_srate(agdev, opts->p_srate_active);
|
} else if (EPOUT_EN(opts) && uac1->ctl_id == agdev->out_ep->address) {
|
opts->c_srate_active = val;
|
u_audio_set_capture_srate(agdev, opts->c_srate_active);
|
}
|
}
|
|
static int audio_set_intf_req(struct usb_function *f,
|
const struct usb_ctrlrequest *ctrl)
|
{
|
struct f_uac *uac1 = func_to_uac(f);
|
struct usb_composite_dev *cdev = f->config->cdev;
|
struct usb_request *req = cdev->req;
|
u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF);
|
u16 len = le16_to_cpu(ctrl->wLength);
|
u16 w_value = le16_to_cpu(ctrl->wValue);
|
u8 con_sel = (w_value >> 8) & 0xFF;
|
u8 cmd = (ctrl->bRequest & 0x0F);
|
struct usb_audio_control_selector *cs;
|
struct usb_audio_control *con;
|
|
DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n",
|
ctrl->bRequest, w_value, len, id);
|
|
list_for_each_entry(cs, &uac1->cs, list) {
|
if (cs->id == id) {
|
list_for_each_entry(con, &cs->control, list) {
|
if (con->type == con_sel) {
|
uac1->set_con = con;
|
break;
|
}
|
}
|
break;
|
}
|
}
|
|
uac1->set_cmd = cmd;
|
req->context = uac1;
|
req->complete = intf_complete;
|
|
return len;
|
}
|
|
static int audio_get_intf_req(struct usb_function *f,
|
const struct usb_ctrlrequest *ctrl)
|
{
|
struct f_uac *uac1 = func_to_uac(f);
|
struct usb_composite_dev *cdev = f->config->cdev;
|
struct usb_request *req = cdev->req;
|
int value = -EOPNOTSUPP;
|
u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF);
|
u16 len = le16_to_cpu(ctrl->wLength);
|
u16 w_value = le16_to_cpu(ctrl->wValue);
|
u8 con_sel = (w_value >> 8) & 0xFF;
|
u8 cmd = (ctrl->bRequest & 0x0F);
|
struct usb_audio_control_selector *cs;
|
struct usb_audio_control *con;
|
|
DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n",
|
ctrl->bRequest, w_value, len, id);
|
|
list_for_each_entry(cs, &uac1->cs, list) {
|
if (cs->id == id) {
|
list_for_each_entry(con, &cs->control, list) {
|
if (con->type == con_sel && con->get) {
|
value = con->get(con, cmd);
|
break;
|
}
|
}
|
break;
|
}
|
}
|
|
req->context = uac1;
|
req->complete = intf_complete;
|
len = min_t(size_t, sizeof(value), len);
|
memcpy(req->buf, &value, len);
|
|
return len;
|
}
|
|
static int audio_set_endpoint_req(struct usb_function *f,
|
const struct usb_ctrlrequest *ctrl)
|
{
|
struct usb_composite_dev *cdev = f->config->cdev;
|
struct usb_request *req = f->config->cdev->req;
|
struct f_uac *uac1 = func_to_uac(f);
|
int value = -EOPNOTSUPP;
|
u8 ep = le16_to_cpu(ctrl->wIndex) & 0xff;
|
u16 len = le16_to_cpu(ctrl->wLength);
|
u16 w_value = le16_to_cpu(ctrl->wValue);
|
u8 cs = w_value >> 8;
|
|
DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n",
|
ctrl->bRequest, w_value, len, ep);
|
|
switch (ctrl->bRequest) {
|
case UAC_SET_CUR: {
|
if (cs == UAC_EP_CS_ATTR_SAMPLE_RATE) {
|
cdev->gadget->ep0->driver_data = f;
|
uac1->ctl_id = ep;
|
req->complete = uac_cs_attr_sample_rate;
|
}
|
value = len;
|
break;
|
}
|
case UAC_SET_MIN:
|
break;
|
|
case UAC_SET_MAX:
|
break;
|
|
case UAC_SET_RES:
|
break;
|
|
case UAC_SET_MEM:
|
break;
|
|
default:
|
break;
|
}
|
|
return value;
|
}
|
|
static int audio_get_endpoint_req(struct usb_function *f,
|
const struct usb_ctrlrequest *ctrl)
|
{
|
struct usb_composite_dev *cdev = f->config->cdev;
|
struct usb_request *req = f->config->cdev->req;
|
struct g_audio *agdev = func_to_g_audio(f);
|
struct f_uac_opts *opts = g_audio_to_uac_opts(agdev);
|
u8 *buf = (u8 *)req->buf;
|
int value = -EOPNOTSUPP;
|
u8 ep = le16_to_cpu(ctrl->wIndex) & 0xff;
|
u16 len = le16_to_cpu(ctrl->wLength);
|
u16 w_value = le16_to_cpu(ctrl->wValue);
|
u8 cs = w_value >> 8;
|
u32 val = 0;
|
|
DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n",
|
ctrl->bRequest, w_value, len, ep);
|
|
switch (ctrl->bRequest) {
|
case UAC_GET_CUR: {
|
if (cs == UAC_EP_CS_ATTR_SAMPLE_RATE) {
|
if (EPIN_EN(opts) && ep == agdev->in_ep->address)
|
val = opts->p_srate_active;
|
else if (EPOUT_EN(opts) && ep == agdev->out_ep->address)
|
val = opts->c_srate_active;
|
buf[2] = (val >> 16) & 0xff;
|
buf[1] = (val >> 8) & 0xff;
|
buf[0] = val & 0xff;
|
}
|
value = len;
|
break;
|
}
|
case UAC_GET_MIN:
|
case UAC_GET_MAX:
|
case UAC_GET_RES:
|
value = len;
|
break;
|
case UAC_GET_MEM:
|
break;
|
default:
|
break;
|
}
|
|
return value;
|
}
|
|
static int
|
f_audio_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
|
{
|
struct usb_composite_dev *cdev = f->config->cdev;
|
struct usb_request *req = cdev->req;
|
int value = -EOPNOTSUPP;
|
u16 w_index = le16_to_cpu(ctrl->wIndex);
|
u16 w_value = le16_to_cpu(ctrl->wValue);
|
u16 w_length = le16_to_cpu(ctrl->wLength);
|
|
/* composite driver infrastructure handles everything; interface
|
* activation uses set_alt().
|
*/
|
switch (ctrl->bRequestType) {
|
case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE:
|
value = audio_set_intf_req(f, ctrl);
|
break;
|
|
case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE:
|
value = audio_get_intf_req(f, ctrl);
|
break;
|
|
case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT:
|
value = audio_set_endpoint_req(f, ctrl);
|
break;
|
|
case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT:
|
value = audio_get_endpoint_req(f, ctrl);
|
break;
|
|
default:
|
ERROR(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
|
ctrl->bRequestType, ctrl->bRequest,
|
w_value, w_index, w_length);
|
}
|
|
/* respond with data transfer or status phase? */
|
if (value >= 0) {
|
DBG(cdev, "audio req%02x.%02x v%04x i%04x l%d\n",
|
ctrl->bRequestType, ctrl->bRequest,
|
w_value, w_index, w_length);
|
req->zero = 0;
|
req->length = value;
|
value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
|
if (value < 0)
|
ERROR(cdev, "audio response on err %d\n", value);
|
}
|
|
/* device either stalls (value < 0) or reports success */
|
return value;
|
}
|
|
static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
|
{
|
struct usb_composite_dev *cdev = f->config->cdev;
|
struct usb_gadget *gadget = cdev->gadget;
|
struct device *dev = &gadget->dev;
|
struct f_uac *uac1 = func_to_uac(f);
|
int ret = 0;
|
|
/* No i/f has more than 2 alt settings */
|
if (alt > 1) {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
return -EINVAL;
|
}
|
|
if (intf == uac1->ac_intf) {
|
/* Control I/f has only 1 AltSetting - 0 */
|
if (alt) {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
return -EINVAL;
|
}
|
return 0;
|
}
|
|
if (intf == uac1->as_out_intf) {
|
uac1->as_out_alt = alt;
|
|
if (alt)
|
ret = u_audio_start_capture(&uac1->g_audio);
|
else
|
u_audio_stop_capture(&uac1->g_audio);
|
} else if (intf == uac1->as_in_intf) {
|
uac1->as_in_alt = alt;
|
|
if (alt)
|
ret = u_audio_start_playback(&uac1->g_audio);
|
else
|
u_audio_stop_playback(&uac1->g_audio);
|
} else {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
return -EINVAL;
|
}
|
|
return ret;
|
}
|
|
static int f_audio_get_alt(struct usb_function *f, unsigned intf)
|
{
|
struct usb_composite_dev *cdev = f->config->cdev;
|
struct usb_gadget *gadget = cdev->gadget;
|
struct device *dev = &gadget->dev;
|
struct f_uac *uac1 = func_to_uac(f);
|
|
if (intf == uac1->ac_intf)
|
return uac1->ac_alt;
|
else if (intf == uac1->as_out_intf)
|
return uac1->as_out_alt;
|
else if (intf == uac1->as_in_intf)
|
return uac1->as_in_alt;
|
else
|
dev_err(dev, "%s:%d Invalid Interface %d!\n",
|
__func__, __LINE__, intf);
|
|
return -EINVAL;
|
}
|
|
|
static void f_audio_disable(struct usb_function *f)
|
{
|
struct f_uac *uac1 = func_to_uac(f);
|
|
uac1->as_out_alt = 0;
|
uac1->as_in_alt = 0;
|
|
u_audio_stop_playback(&uac1->g_audio);
|
u_audio_stop_capture(&uac1->g_audio);
|
}
|
|
/*-------------------------------------------------------------------------*/
|
#define USBDHDR(p) (struct usb_descriptor_header *)(p)
|
|
static void setup_headers(struct f_uac_opts *opts,
|
struct usb_descriptor_header **headers,
|
enum usb_device_speed speed)
|
{
|
struct usb_ss_ep_comp_descriptor *epout_desc_comp = NULL;
|
struct usb_ss_ep_comp_descriptor *epin_desc_comp = NULL;
|
struct usb_endpoint_descriptor *epout_desc;
|
struct usb_endpoint_descriptor *epin_desc;
|
int i;
|
|
switch (speed) {
|
case USB_SPEED_FULL:
|
/* fall through */
|
case USB_SPEED_HIGH:
|
epout_desc = &as_out_ep_desc;
|
epin_desc = &as_in_ep_desc;
|
break;
|
default:
|
epout_desc = &ss_out_ep_desc;
|
epin_desc = &ss_in_ep_desc;
|
epout_desc_comp = &ss_out_ep_desc_comp;
|
epin_desc_comp = &ss_in_ep_desc_comp;
|
}
|
|
i = 0;
|
headers[i++] = USBDHDR(&iad_desc);
|
headers[i++] = USBDHDR(&ac_interface_desc);
|
headers[i++] = USBDHDR(&ac_header_desc);
|
|
if (EPOUT_EN(opts)) {
|
headers[i++] = USBDHDR(&usb_out_it_desc);
|
if (EPOUT_FU(opts))
|
headers[i++] = USBDHDR(&io_out_ot_fu_desc);
|
headers[i++] = USBDHDR(&io_out_ot_desc);
|
}
|
|
if (EPIN_EN(opts)) {
|
headers[i++] = USBDHDR(&io_in_it_desc);
|
if (EPIN_FU(opts))
|
headers[i++] = USBDHDR(&usb_in_ot_fu_desc);
|
headers[i++] = USBDHDR(&usb_in_ot_desc);
|
}
|
|
if (EPOUT_EN(opts)) {
|
headers[i++] = USBDHDR(&as_out_interface_alt_0_desc);
|
headers[i++] = USBDHDR(&as_out_interface_alt_1_desc);
|
headers[i++] = USBDHDR(&as_out_header_desc);
|
headers[i++] = USBDHDR(&as_out_type_i_desc);
|
headers[i++] = USBDHDR(epout_desc);
|
if (epout_desc_comp)
|
headers[i++] = USBDHDR(epout_desc_comp);
|
|
headers[i++] = USBDHDR(&as_iso_out_desc);
|
}
|
|
if (EPIN_EN(opts)) {
|
headers[i++] = USBDHDR(&as_in_interface_alt_0_desc);
|
headers[i++] = USBDHDR(&as_in_interface_alt_1_desc);
|
headers[i++] = USBDHDR(&as_in_header_desc);
|
headers[i++] = USBDHDR(&as_in_type_i_desc);
|
headers[i++] = USBDHDR(epin_desc);
|
if (epin_desc_comp)
|
headers[i++] = USBDHDR(epin_desc_comp);
|
|
headers[i++] = USBDHDR(&as_iso_in_desc);
|
}
|
headers[i] = NULL;
|
}
|
|
static void setup_descriptor(struct f_uac_opts *opts)
|
{
|
int i = 1;
|
u16 len = 0;
|
|
if (EPOUT_EN(opts))
|
usb_out_it_desc.bTerminalID = i++;
|
if (EPIN_EN(opts))
|
io_in_it_desc.bTerminalID = i++;
|
if (EPOUT_EN(opts) && EPOUT_FU(opts))
|
io_out_ot_fu_desc.bUnitID = i++;
|
if (EPIN_EN(opts) && EPIN_FU(opts))
|
usb_in_ot_fu_desc.bUnitID = i++;
|
if (EPOUT_EN(opts))
|
io_out_ot_desc.bTerminalID = i++;
|
if (EPIN_EN(opts))
|
usb_in_ot_desc.bTerminalID = i++;
|
|
if (EPIN_FU(opts)) {
|
usb_in_ot_desc.bSourceID = usb_in_ot_fu_desc.bUnitID;
|
usb_in_ot_fu_desc.bSourceID = io_in_it_desc.bTerminalID;
|
p_feature_unit.id = usb_in_ot_fu_desc.bUnitID;
|
} else {
|
usb_in_ot_desc.bSourceID = io_in_it_desc.bTerminalID;
|
}
|
if (EPOUT_FU(opts)) {
|
io_out_ot_desc.bSourceID = io_out_ot_fu_desc.bUnitID;
|
io_out_ot_fu_desc.bSourceID = usb_out_it_desc.bTerminalID;
|
c_feature_unit.id = io_out_ot_fu_desc.bUnitID;
|
} else {
|
io_out_ot_desc.bSourceID = usb_out_it_desc.bTerminalID;
|
}
|
as_out_header_desc.bTerminalLink = usb_out_it_desc.bTerminalID;
|
as_in_header_desc.bTerminalLink = usb_in_ot_desc.bTerminalID;
|
|
iad_desc.bInterfaceCount = 1;
|
ac_header_desc.bInCollection = 0;
|
|
if (EPIN_EN(opts)) {
|
len += UAC_DT_INPUT_TERMINAL_SIZE + UAC_DT_OUTPUT_TERMINAL_SIZE;
|
if (EPIN_FU(opts))
|
len += UAC_DT_FEATURE_UNIT_SIZE(0);
|
iad_desc.bInterfaceCount++;
|
ac_header_desc.bInCollection++;
|
}
|
|
if (EPOUT_EN(opts)) {
|
len += UAC_DT_INPUT_TERMINAL_SIZE + UAC_DT_OUTPUT_TERMINAL_SIZE;
|
if (EPOUT_FU(opts))
|
len += UAC_DT_FEATURE_UNIT_SIZE(0);
|
iad_desc.bInterfaceCount++;
|
ac_header_desc.bInCollection++;
|
}
|
ac_header_desc.bLength =
|
UAC_DT_AC_HEADER_SIZE(ac_header_desc.bInCollection);
|
ac_header_desc.wTotalLength = cpu_to_le16(len + ac_header_desc.bLength);
|
|
setup_headers(opts, f_audio_desc, USB_SPEED_HIGH);
|
setup_headers(opts, f_ss_audio_desc, USB_SPEED_SUPER);
|
}
|
|
static int set_ep_max_packet_size(const struct f_uac_opts *opts,
|
struct usb_endpoint_descriptor *ep_desc,
|
enum usb_device_speed speed, bool is_playback)
|
{
|
int chmask, srate = 0, ssize;
|
u16 max_size_bw, max_size_ep;
|
unsigned int factor;
|
int i;
|
|
switch (speed) {
|
case USB_SPEED_FULL:
|
max_size_ep = 1023;
|
factor = 1000;
|
break;
|
|
case USB_SPEED_HIGH:
|
/* fall through */
|
case USB_SPEED_SUPER:
|
max_size_ep = 1024;
|
factor = 8000;
|
break;
|
|
default:
|
return -EINVAL;
|
}
|
|
if (is_playback) {
|
chmask = opts->p_chmask;
|
for (i = 0; i < UAC_MAX_RATES; i++) {
|
if (opts->p_srate[i] == 0)
|
break;
|
if (opts->p_srate[i] > srate)
|
srate = opts->p_srate[i];
|
}
|
ssize = opts->p_ssize;
|
} else {
|
chmask = opts->c_chmask;
|
for (i = 0; i < UAC_MAX_RATES; i++) {
|
if (opts->c_srate[i] == 0)
|
break;
|
if (opts->c_srate[i] > srate)
|
srate = opts->c_srate[i];
|
}
|
ssize = opts->c_ssize;
|
}
|
|
max_size_bw = num_channels(chmask) * ssize *
|
((srate / (factor / (1 << (ep_desc->bInterval - 1)))) + 1);
|
ep_desc->wMaxPacketSize = cpu_to_le16(min_t(u16, max_size_bw,
|
max_size_ep));
|
|
return 0;
|
}
|
|
static int f_audio_validate_opts(struct g_audio *audio, struct device *dev)
|
{
|
struct f_uac_opts *opts = g_audio_to_uac_opts(audio);
|
|
if (!opts->p_chmask && !opts->c_chmask) {
|
dev_err(dev, "Error: no playback and capture channels\n");
|
return -EINVAL;
|
} else if (opts->p_chmask & ~UAC1_CHANNEL_MASK) {
|
dev_err(dev, "Error: unsupported playback channels mask\n");
|
return -EINVAL;
|
} else if (opts->c_chmask & ~UAC1_CHANNEL_MASK) {
|
dev_err(dev, "Error: unsupported capture channels mask\n");
|
return -EINVAL;
|
} else if ((opts->p_ssize < 1) || (opts->p_ssize > 4)) {
|
dev_err(dev, "Error: incorrect playback sample size\n");
|
return -EINVAL;
|
} else if ((opts->c_ssize < 1) || (opts->c_ssize > 4)) {
|
dev_err(dev, "Error: incorrect capture sample size\n");
|
return -EINVAL;
|
} else if (!opts->p_srate) {
|
dev_err(dev, "Error: incorrect playback sampling rate\n");
|
return -EINVAL;
|
} else if (!opts->c_srate) {
|
dev_err(dev, "Error: incorrect capture sampling rate\n");
|
return -EINVAL;
|
}
|
|
return 0;
|
}
|
|
/* audio function driver setup/binding */
|
static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
|
{
|
struct usb_composite_dev *cdev = c->cdev;
|
struct usb_gadget *gadget = cdev->gadget;
|
struct f_uac *uac1 = func_to_uac(f);
|
struct g_audio *audio = func_to_g_audio(f);
|
struct f_uac_opts *audio_opts;
|
struct usb_ep *ep = NULL;
|
struct usb_string *us;
|
struct device *dev = &gadget->dev;
|
int status;
|
int idx, i;
|
|
status = f_audio_validate_opts(audio, dev);
|
if (status)
|
return status;
|
|
audio_opts = container_of(f->fi, struct f_uac_opts, func_inst);
|
|
us = usb_gstrings_attach(cdev, uac1_strings, ARRAY_SIZE(strings_uac1));
|
if (IS_ERR(us))
|
return PTR_ERR(us);
|
|
iad_desc.iFunction = us[STR_ASSOC].id;
|
ac_interface_desc.iInterface = us[STR_AC_IF].id;
|
usb_out_it_desc.iTerminal = us[STR_USB_OUT_IT].id;
|
usb_out_it_desc.iChannelNames = us[STR_USB_OUT_IT_CH_NAMES].id;
|
io_out_ot_fu_desc.iFeature = us[STR_IO_OUT_OT_FU].id;
|
io_out_ot_desc.iTerminal = us[STR_IO_OUT_OT].id;
|
as_out_interface_alt_0_desc.iInterface = us[STR_AS_OUT_IF_ALT0].id;
|
as_out_interface_alt_1_desc.iInterface = us[STR_AS_OUT_IF_ALT1].id;
|
io_in_it_desc.iTerminal = us[STR_IO_IN_IT].id;
|
io_in_it_desc.iChannelNames = us[STR_IO_IN_IT_CH_NAMES].id;
|
usb_in_ot_fu_desc.iFeature = us[STR_USB_IN_OT_FU].id;
|
usb_in_ot_desc.iTerminal = us[STR_USB_IN_OT].id;
|
as_in_interface_alt_0_desc.iInterface = us[STR_AS_IN_IF_ALT0].id;
|
as_in_interface_alt_1_desc.iInterface = us[STR_AS_IN_IF_ALT1].id;
|
|
/* Set channel numbers */
|
usb_out_it_desc.bNrChannels = num_channels(audio_opts->c_chmask);
|
usb_out_it_desc.wChannelConfig = cpu_to_le16(audio_opts->c_chmask);
|
as_out_type_i_desc.bNrChannels = num_channels(audio_opts->c_chmask);
|
as_out_type_i_desc.bSubframeSize = audio_opts->c_ssize;
|
as_out_type_i_desc.bBitResolution = audio_opts->c_ssize * 8;
|
io_in_it_desc.bNrChannels = num_channels(audio_opts->p_chmask);
|
io_in_it_desc.wChannelConfig = cpu_to_le16(audio_opts->p_chmask);
|
as_in_type_i_desc.bNrChannels = num_channels(audio_opts->p_chmask);
|
as_in_type_i_desc.bSubframeSize = audio_opts->p_ssize;
|
as_in_type_i_desc.bBitResolution = audio_opts->p_ssize * 8;
|
|
/* Set sample rates */
|
for (i = 0, idx = 0; i < UAC_MAX_RATES; i++) {
|
if (audio_opts->c_srate[i] == 0)
|
break;
|
memcpy(as_out_type_i_desc.tSamFreq[idx++],
|
&audio_opts->c_srate[i], 3);
|
}
|
|
/*
|
* Calculate wMaxPacketSize according to audio bandwidth.
|
* Set the max packet with USB_SPEED_HIGH by default to
|
* be compatible with larger bandwidth requirements for
|
* high speed mode.
|
*/
|
status = set_ep_max_packet_size(audio_opts, &as_out_ep_desc,
|
USB_SPEED_HIGH, false);
|
if (status < 0) {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
goto fail;
|
}
|
|
status = set_ep_max_packet_size(audio_opts, &as_in_ep_desc,
|
USB_SPEED_HIGH, true);
|
if (status < 0) {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
goto fail;
|
}
|
|
status = set_ep_max_packet_size(audio_opts, &ss_out_ep_desc,
|
USB_SPEED_SUPER, false);
|
if (status < 0) {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
goto fail;
|
}
|
|
ss_out_ep_desc_comp.wBytesPerInterval = ss_out_ep_desc.wMaxPacketSize;
|
|
status = set_ep_max_packet_size(audio_opts, &ss_in_ep_desc,
|
USB_SPEED_SUPER, true);
|
if (status < 0) {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
goto fail;
|
}
|
|
ss_in_ep_desc_comp.wBytesPerInterval = ss_in_ep_desc.wMaxPacketSize;
|
|
as_out_type_i_desc.bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(idx);
|
as_out_type_i_desc.bSamFreqType = idx;
|
|
for (i = 0, idx = 0; i < UAC_MAX_RATES; i++) {
|
if (audio_opts->p_srate[i] == 0)
|
break;
|
memcpy(as_in_type_i_desc.tSamFreq[idx++],
|
&audio_opts->p_srate[i], 3);
|
}
|
as_in_type_i_desc.bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(idx);
|
as_in_type_i_desc.bSamFreqType = idx;
|
|
/* allocate instance-specific interface IDs, and patch descriptors */
|
status = usb_interface_id(c, f);
|
if (status < 0)
|
goto fail;
|
iad_desc.bFirstInterface = status;
|
ac_interface_desc.bInterfaceNumber = status;
|
uac1->ac_intf = status;
|
uac1->ac_alt = 0;
|
ac_header_desc.baInterfaceNr[0] = ++status;
|
ac_header_desc.baInterfaceNr[1] = ++status;
|
|
if (EPOUT_EN(audio_opts)) {
|
status = usb_interface_id(c, f);
|
if (status < 0)
|
goto fail;
|
as_out_interface_alt_0_desc.bInterfaceNumber = status;
|
as_out_interface_alt_1_desc.bInterfaceNumber = status;
|
uac1->as_out_intf = status;
|
uac1->as_out_alt = 0;
|
}
|
|
if (EPIN_EN(audio_opts)) {
|
status = usb_interface_id(c, f);
|
if (status < 0)
|
goto fail;
|
as_in_interface_alt_0_desc.bInterfaceNumber = status;
|
as_in_interface_alt_1_desc.bInterfaceNumber = status;
|
uac1->as_in_intf = status;
|
uac1->as_in_alt = 0;
|
}
|
|
audio->gadget = gadget;
|
|
status = -ENODEV;
|
|
/* allocate instance-specific endpoints */
|
if (EPOUT_EN(audio_opts)) {
|
ep = usb_ep_autoconfig(cdev->gadget, &as_out_ep_desc);
|
if (!ep)
|
goto fail;
|
audio->out_ep = ep;
|
audio->out_ep->desc = &as_out_ep_desc;
|
}
|
|
if (EPIN_EN(audio_opts)) {
|
ep = usb_ep_autoconfig(cdev->gadget, &as_in_ep_desc);
|
if (!ep)
|
goto fail;
|
ep->maxpacket = usb_endpoint_maxp(&as_in_ep_desc);
|
audio->in_ep = ep;
|
audio->in_ep->desc = &as_in_ep_desc;
|
}
|
|
ss_out_ep_desc.bEndpointAddress = as_out_ep_desc.bEndpointAddress;
|
ss_in_ep_desc.bEndpointAddress = as_in_ep_desc.bEndpointAddress;
|
|
setup_descriptor(audio_opts);
|
/* copy descriptors, and track endpoint copies */
|
status = usb_assign_descriptors(f, f_audio_desc, f_audio_desc,
|
f_ss_audio_desc, f_ss_audio_desc);
|
if (status)
|
goto fail;
|
|
audio->out_ep_maxpsize = le16_to_cpu(as_out_ep_desc.wMaxPacketSize);
|
audio->in_ep_maxpsize = le16_to_cpu(as_in_ep_desc.wMaxPacketSize);
|
audio->out_ep_maxpsize = max_t(u16, audio->out_ep_maxpsize,
|
le16_to_cpu(ss_out_ep_desc.wMaxPacketSize));
|
audio->in_ep_maxpsize = max_t(u16, audio->in_ep_maxpsize,
|
le16_to_cpu(ss_in_ep_desc.wMaxPacketSize));
|
audio->params.c_chmask = audio_opts->c_chmask;
|
memcpy(audio->params.c_srate, audio_opts->c_srate,
|
sizeof(audio->params.c_srate));
|
audio->params.c_srate_active = audio_opts->c_srate_active;
|
audio->params.c_ssize = audio_opts->c_ssize;
|
audio->params.p_chmask = audio_opts->p_chmask;
|
memcpy(audio->params.p_srate, audio_opts->p_srate,
|
sizeof(audio->params.p_srate));
|
audio->params.p_srate_active = audio_opts->p_srate_active;
|
audio->params.p_ssize = audio_opts->p_ssize;
|
audio->params.req_number = audio_opts->req_number;
|
|
status = g_audio_setup(audio, "UAC1_PCM", "UAC1_Gadget");
|
if (status)
|
goto err_card_register;
|
|
return 0;
|
|
err_card_register:
|
usb_free_all_descriptors(f);
|
fail:
|
return status;
|
}
|
|
/*-------------------------------------------------------------------------*/
|
|
/* Todo: add more control selecotor dynamically */
|
static int control_selector_init(struct f_uac *uac1)
|
{
|
INIT_LIST_HEAD(&uac1->cs);
|
|
/* playback feature unit */
|
list_add(&p_feature_unit.list, &uac1->cs);
|
|
INIT_LIST_HEAD(&p_feature_unit.control);
|
list_add(&p_mute_control.list, &p_feature_unit.control);
|
list_add(&p_volume_control.list, &p_feature_unit.control);
|
|
p_volume_control.data[UAC__CUR] = UAC_VOLUME_CUR;
|
p_volume_control.data[UAC__MIN] = UAC_VOLUME_MIN;
|
p_volume_control.data[UAC__MAX] = UAC_VOLUME_MAX;
|
p_volume_control.data[UAC__RES] = UAC_VOLUME_RES;
|
|
p_volume_control.context = &uac1->g_audio;
|
p_mute_control.context = &uac1->g_audio;
|
|
/* capture feature unit */
|
list_add(&c_feature_unit.list, &uac1->cs);
|
|
INIT_LIST_HEAD(&c_feature_unit.control);
|
list_add(&c_mute_control.list, &c_feature_unit.control);
|
list_add(&c_volume_control.list, &c_feature_unit.control);
|
|
c_volume_control.data[UAC__CUR] = UAC_VOLUME_CUR;
|
c_volume_control.data[UAC__MIN] = UAC_VOLUME_MIN;
|
c_volume_control.data[UAC__MAX] = UAC_VOLUME_MAX;
|
c_volume_control.data[UAC__RES] = UAC_VOLUME_RES;
|
|
c_volume_control.context = &uac1->g_audio;
|
c_mute_control.context = &uac1->g_audio;
|
|
return 0;
|
}
|
|
static struct configfs_item_operations f_uac1_item_ops = {
|
.release = f_uac_attr_release,
|
};
|
|
UAC_ATTRIBUTE(c_chmask);
|
UAC_ATTRIBUTE(c_ssize);
|
UAC_ATTRIBUTE(c_feature_unit);
|
UAC_ATTRIBUTE(p_chmask);
|
UAC_ATTRIBUTE(p_ssize);
|
UAC_ATTRIBUTE(p_feature_unit);
|
UAC_ATTRIBUTE(req_number);
|
|
UAC_RATE_ATTRIBUTE(p_srate);
|
UAC_RATE_ATTRIBUTE(c_srate);
|
|
static struct configfs_attribute *f_uac1_attrs[] = {
|
&f_uac_opts_attr_c_chmask,
|
&f_uac_opts_attr_c_srate,
|
&f_uac_opts_attr_c_ssize,
|
&f_uac_opts_attr_c_feature_unit,
|
&f_uac_opts_attr_p_chmask,
|
&f_uac_opts_attr_p_srate,
|
&f_uac_opts_attr_p_ssize,
|
&f_uac_opts_attr_p_feature_unit,
|
&f_uac_opts_attr_req_number,
|
NULL,
|
};
|
|
static const struct config_item_type f_uac1_func_type = {
|
.ct_item_ops = &f_uac1_item_ops,
|
.ct_attrs = f_uac1_attrs,
|
.ct_owner = THIS_MODULE,
|
};
|
|
static void f_audio_free_inst(struct usb_function_instance *f)
|
{
|
struct f_uac_opts *opts;
|
|
opts = container_of(f, struct f_uac_opts, func_inst);
|
kfree(opts);
|
}
|
|
static struct usb_function_instance *f_audio_alloc_inst(void)
|
{
|
struct f_uac_opts *opts;
|
|
opts = kzalloc(sizeof(*opts), GFP_KERNEL);
|
if (!opts)
|
return ERR_PTR(-ENOMEM);
|
|
mutex_init(&opts->lock);
|
opts->func_inst.free_func_inst = f_audio_free_inst;
|
|
config_group_init_type_name(&opts->func_inst.group, "",
|
&f_uac1_func_type);
|
|
opts->c_chmask = UAC_DEF_CCHMASK;
|
opts->c_srate[0] = UAC_DEF_CSRATE;
|
opts->c_srate_active = UAC_DEF_CSRATE;
|
opts->c_ssize = UAC_DEF_CSSIZE;
|
opts->c_feature_unit = UAC_DEF_CFU;
|
opts->p_chmask = UAC_DEF_PCHMASK;
|
opts->p_srate[0] = UAC_DEF_PSRATE;
|
opts->p_srate_active = UAC_DEF_PSRATE;
|
opts->p_ssize = UAC_DEF_PSSIZE;
|
opts->p_feature_unit = UAC_DEF_PFU;
|
opts->req_number = UAC_DEF_REQ_NUM;
|
return &opts->func_inst;
|
}
|
|
static void f_audio_free(struct usb_function *f)
|
{
|
struct g_audio *audio;
|
struct f_uac_opts *opts;
|
|
audio = func_to_g_audio(f);
|
opts = container_of(f->fi, struct f_uac_opts, func_inst);
|
kfree(audio);
|
mutex_lock(&opts->lock);
|
--opts->refcnt;
|
mutex_unlock(&opts->lock);
|
}
|
|
static void f_audio_unbind(struct usb_configuration *c, struct usb_function *f)
|
{
|
struct g_audio *audio = func_to_g_audio(f);
|
|
g_audio_cleanup(audio);
|
usb_free_all_descriptors(f);
|
|
audio->gadget = NULL;
|
}
|
|
static struct usb_function *f_audio_alloc(struct usb_function_instance *fi)
|
{
|
struct f_uac *uac1;
|
struct f_uac_opts *opts;
|
|
/* allocate and initialize one new instance */
|
uac1 = kzalloc(sizeof(*uac1), GFP_KERNEL);
|
if (!uac1)
|
return ERR_PTR(-ENOMEM);
|
|
opts = container_of(fi, struct f_uac_opts, func_inst);
|
mutex_lock(&opts->lock);
|
++opts->refcnt;
|
mutex_unlock(&opts->lock);
|
|
uac1->g_audio.func.name = "uac1_func";
|
uac1->g_audio.func.bind = f_audio_bind;
|
uac1->g_audio.func.unbind = f_audio_unbind;
|
uac1->g_audio.func.set_alt = f_audio_set_alt;
|
uac1->g_audio.func.get_alt = f_audio_get_alt;
|
uac1->g_audio.func.setup = f_audio_setup;
|
uac1->g_audio.func.disable = f_audio_disable;
|
uac1->g_audio.func.free_func = f_audio_free;
|
|
control_selector_init(uac1);
|
|
return &uac1->g_audio.func;
|
}
|
|
DECLARE_USB_FUNCTION_INIT(uac1, f_audio_alloc_inst, f_audio_alloc);
|
MODULE_LICENSE("GPL");
|
MODULE_AUTHOR("Ruslan Bilovol");
|
