// SPDX-License-Identifier: GPL-2.0+
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/*
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* f_uac2.c -- USB Audio Class 2.0 Function
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*
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* Copyright (C) 2011
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* Yadwinder Singh (yadi.brar01@gmail.com)
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* Jaswinder Singh (jaswinder.singh@linaro.org)
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* Copyright (C) 2017 Julian Scheel <julian@jusst.de>
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*/
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#include <linux/usb/audio.h>
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#include <linux/usb/audio-v2.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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/*
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* The driver implements a simple UAC_2 topology.
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* USB-OUT -> IT_1 -> OT_3 -> ALSA_Capture
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* ALSA_Playback -> IT_2 -> OT_4 -> USB-IN
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* Capture and Playback sampling rates are independently
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* controlled by two clock sources :
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* CLK_5 := c_srate, and CLK_6 := p_srate
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*/
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#define USB_OUT_CLK_ID (out_clk_src_desc.bClockID)
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#define USB_IN_CLK_ID (in_clk_src_desc.bClockID)
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#define CONTROL_ABSENT 0
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#define CONTROL_RDONLY 1
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#define CONTROL_RDWR 3
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#define CLK_FREQ_CTRL 0
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#define CLK_VLD_CTRL 2
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#define COPY_CTRL 0
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#define CONN_CTRL 2
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#define OVRLD_CTRL 4
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#define CLSTR_CTRL 6
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#define UNFLW_CTRL 8
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#define OVFLW_CTRL 10
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/* --------- USB Function Interface ------------- */
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enum {
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STR_ASSOC,
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STR_IF_CTRL,
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STR_CLKSRC_IN,
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STR_CLKSRC_OUT,
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STR_USB_IT,
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STR_IO_IT,
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STR_USB_OT_FU,
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STR_IO_OT_FU,
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STR_USB_OT,
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STR_IO_OT,
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STR_AS_OUT_ALT0,
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STR_AS_OUT_ALT1,
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STR_AS_IN_ALT0,
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STR_AS_IN_ALT1,
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};
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static struct usb_string strings_fn[] = {
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[STR_ASSOC].s = "Source/Sink",
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[STR_IF_CTRL].s = "Topology Control",
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[STR_CLKSRC_IN].s = "Input clock",
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[STR_CLKSRC_OUT].s = "Output clock",
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[STR_USB_IT].s = "USBH Out",
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[STR_IO_IT].s = "USBD Out",
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[STR_USB_OT_FU].s = "USBH In Feature Unit",
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[STR_IO_OT_FU].s = "USBD In Feature Unit",
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[STR_USB_OT].s = "USBH In",
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[STR_IO_OT].s = "USBD In",
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[STR_AS_OUT_ALT0].s = "Playback Inactive",
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[STR_AS_OUT_ALT1].s = "Playback Active",
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[STR_AS_IN_ALT0].s = "Capture Inactive",
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[STR_AS_IN_ALT1].s = "Capture Active",
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{ },
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};
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static struct usb_gadget_strings str_fn = {
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.language = 0x0409, /* en-us */
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.strings = strings_fn,
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};
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static struct usb_gadget_strings *fn_strings[] = {
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&str_fn,
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NULL,
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};
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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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.bInterfaceCount = 3,
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.bFunctionClass = USB_CLASS_AUDIO,
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.bFunctionSubClass = UAC2_FUNCTION_SUBCLASS_UNDEFINED,
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.bFunctionProtocol = UAC_VERSION_2,
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};
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/* Audio Control Interface */
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static struct usb_interface_descriptor std_ac_if_desc = {
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.bLength = sizeof std_ac_if_desc,
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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_AUDIOCONTROL,
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.bInterfaceProtocol = UAC_VERSION_2,
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};
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/* Clock source for IN traffic */
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static struct uac_clock_source_descriptor in_clk_src_desc = {
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.bLength = sizeof in_clk_src_desc,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC2_CLOCK_SOURCE,
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/* .bClockID = DYNAMIC */
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.bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED,
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.bmControls = (CONTROL_RDWR << CLK_FREQ_CTRL),
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.bAssocTerminal = 0,
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};
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/* Clock source for OUT traffic */
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static struct uac_clock_source_descriptor out_clk_src_desc = {
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.bLength = sizeof out_clk_src_desc,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC2_CLOCK_SOURCE,
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/* .bClockID = DYNAMIC */
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.bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED,
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.bmControls = (CONTROL_RDWR << CLK_FREQ_CTRL),
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.bAssocTerminal = 0,
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};
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/* Input Terminal for USB_OUT */
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static struct uac2_input_terminal_descriptor usb_out_it_desc = {
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.bLength = sizeof usb_out_it_desc,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_INPUT_TERMINAL,
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/* .bTerminalID = DYNAMIC */
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.wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING),
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.bAssocTerminal = 0,
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/* .bCSourceID = DYNAMIC */
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.iChannelNames = 0,
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.bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL),
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};
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/* Input Terminal for I/O-In */
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static struct uac2_input_terminal_descriptor io_in_it_desc = {
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.bLength = sizeof io_in_it_desc,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_INPUT_TERMINAL,
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/* .bTerminalID = DYNAMIC */
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.wTerminalType = cpu_to_le16(UAC_INPUT_TERMINAL_MICROPHONE),
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.bAssocTerminal = 0,
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/* .bCSourceID = DYNAMIC */
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.iChannelNames = 0,
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.bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL),
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};
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DECLARE_UAC2_FEATURE_UNIT_DESCRIPTOR(0);
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/* Feature Unit for I/O-out */
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static struct uac2_feature_unit_descriptor_0 io_out_ot_fu_desc = {
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.bLength = UAC2_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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/* .bUnitID = DYNAMIC */
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/* .bSourceID = DYNAMIC */
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.bmaControls[0] = (UAC2_CONTROL_BIT_RW(UAC_FU_MUTE) |
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UAC2_CONTROL_BIT_RW(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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/* .id = DYNAMIC */
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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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/* Feature Unit for USB_IN */
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static struct uac2_feature_unit_descriptor_0 usb_in_ot_fu_desc = {
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.bLength = UAC2_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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/* .bUnitID = DYNAMIC */
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/* .bSourceID = DYNAMIC */
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.bmaControls[0] = (UAC2_CONTROL_BIT_RW(UAC_FU_MUTE) |
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UAC2_CONTROL_BIT_RW(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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/* .id = DYNAMIC */
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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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/* Ouput Terminal for USB_IN */
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static struct uac2_output_terminal_descriptor usb_in_ot_desc = {
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.bLength = sizeof usb_in_ot_desc,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
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/* .bTerminalID = DYNAMIC */
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.wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING),
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.bAssocTerminal = 0,
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/* .bSourceID = DYNAMIC */
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/* .bCSourceID = DYNAMIC */
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.bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL),
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};
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/* Ouput Terminal for I/O-Out */
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static struct uac2_output_terminal_descriptor io_out_ot_desc = {
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.bLength = sizeof io_out_ot_desc,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
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/* .bTerminalID = DYNAMIC */
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.wTerminalType = cpu_to_le16(UAC_OUTPUT_TERMINAL_SPEAKER),
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.bAssocTerminal = 0,
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/* .bSourceID = DYNAMIC */
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/* .bCSourceID = DYNAMIC */
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.bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL),
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};
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static struct uac2_ac_header_descriptor ac_hdr_desc = {
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.bLength = sizeof ac_hdr_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(0x200),
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.bCategory = UAC2_FUNCTION_IO_BOX,
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.wTotalLength = cpu_to_le16(sizeof ac_hdr_desc + sizeof in_clk_src_desc
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+ sizeof out_clk_src_desc + sizeof usb_out_it_desc
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+ sizeof io_in_it_desc + sizeof usb_in_ot_desc
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+ sizeof io_out_ot_desc + sizeof usb_in_ot_fu_desc
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+ sizeof io_out_ot_fu_desc),
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.bmControls = 0,
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};
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/* Audio Streaming OUT Interface - Alt0 */
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static struct usb_interface_descriptor std_as_out_if0_desc = {
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.bLength = sizeof std_as_out_if0_desc,
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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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.bInterfaceProtocol = UAC_VERSION_2,
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};
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/* Audio Streaming OUT Interface - Alt1 */
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static struct usb_interface_descriptor std_as_out_if1_desc = {
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.bLength = sizeof std_as_out_if1_desc,
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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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.bInterfaceProtocol = UAC_VERSION_2,
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};
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/* Audio Stream OUT Intface Desc */
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static struct uac2_as_header_descriptor as_out_hdr_desc = {
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.bLength = sizeof as_out_hdr_desc,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_AS_GENERAL,
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/* .bTerminalLink = DYNAMIC */
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.bmControls = 0,
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.bFormatType = UAC_FORMAT_TYPE_I,
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.bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM),
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.iChannelNames = 0,
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};
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/* Audio USB_OUT Format */
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static struct uac2_format_type_i_descriptor as_out_fmt1_desc = {
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.bLength = sizeof as_out_fmt1_desc,
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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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};
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/* STD AS ISO OUT Endpoint */
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static struct usb_endpoint_descriptor fs_epout_desc = {
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.bLength = USB_DT_ENDPOINT_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 = 1,
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};
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static struct usb_endpoint_descriptor hs_epout_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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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_endpoint_descriptor ss_epout_desc = {
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.bLength = USB_DT_ENDPOINT_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_epout_desc_comp = {
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.bLength = sizeof(ss_epout_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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/* CS AS ISO OUT Endpoint */
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static struct uac2_iso_endpoint_descriptor as_iso_out_desc = {
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.bLength = sizeof as_iso_out_desc,
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.bDescriptorType = USB_DT_CS_ENDPOINT,
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.bDescriptorSubtype = UAC_EP_GENERAL,
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.bmAttributes = 0,
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.bmControls = 0,
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.bLockDelayUnits = 0,
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.wLockDelay = 0,
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};
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/* Audio Streaming IN Interface - Alt0 */
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static struct usb_interface_descriptor std_as_in_if0_desc = {
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.bLength = sizeof std_as_in_if0_desc,
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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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.bInterfaceProtocol = UAC_VERSION_2,
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};
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/* Audio Streaming IN Interface - Alt1 */
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static struct usb_interface_descriptor std_as_in_if1_desc = {
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.bLength = sizeof std_as_in_if1_desc,
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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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.bInterfaceProtocol = UAC_VERSION_2,
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};
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/* Audio Stream IN Intface Desc */
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static struct uac2_as_header_descriptor as_in_hdr_desc = {
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.bLength = sizeof as_in_hdr_desc,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_AS_GENERAL,
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/* .bTerminalLink = DYNAMIC */
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.bmControls = 0,
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.bFormatType = UAC_FORMAT_TYPE_I,
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.bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM),
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.iChannelNames = 0,
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};
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/* Audio USB_IN Format */
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static struct uac2_format_type_i_descriptor as_in_fmt1_desc = {
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.bLength = sizeof as_in_fmt1_desc,
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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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};
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/* STD AS ISO IN Endpoint */
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static struct usb_endpoint_descriptor fs_epin_desc = {
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.bLength = USB_DT_ENDPOINT_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_SYNC,
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/* .wMaxPacketSize = DYNAMIC */
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.bInterval = 1,
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};
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static struct usb_endpoint_descriptor hs_epin_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_SYNC,
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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_epin_desc = {
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.bLength = USB_DT_ENDPOINT_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_epin_desc_comp = {
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.bLength = sizeof(ss_epin_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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/* CS AS ISO IN Endpoint */
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static struct uac2_iso_endpoint_descriptor as_iso_in_desc = {
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.bLength = sizeof as_iso_in_desc,
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.bDescriptorType = USB_DT_CS_ENDPOINT,
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.bDescriptorSubtype = UAC_EP_GENERAL,
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.bmAttributes = 0,
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.bmControls = 0,
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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 *fs_audio_desc[] = {
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(struct usb_descriptor_header *)&iad_desc,
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(struct usb_descriptor_header *)&std_ac_if_desc,
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(struct usb_descriptor_header *)&ac_hdr_desc,
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(struct usb_descriptor_header *)&in_clk_src_desc,
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(struct usb_descriptor_header *)&out_clk_src_desc,
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(struct usb_descriptor_header *)&usb_out_it_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 *)&io_out_ot_fu_desc,
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(struct usb_descriptor_header *)&usb_in_ot_desc,
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(struct usb_descriptor_header *)&io_out_ot_desc,
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(struct usb_descriptor_header *)&std_as_out_if0_desc,
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(struct usb_descriptor_header *)&std_as_out_if1_desc,
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(struct usb_descriptor_header *)&as_out_hdr_desc,
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(struct usb_descriptor_header *)&as_out_fmt1_desc,
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(struct usb_descriptor_header *)&fs_epout_desc,
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(struct usb_descriptor_header *)&as_iso_out_desc,
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(struct usb_descriptor_header *)&std_as_in_if0_desc,
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(struct usb_descriptor_header *)&std_as_in_if1_desc,
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(struct usb_descriptor_header *)&as_in_hdr_desc,
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(struct usb_descriptor_header *)&as_in_fmt1_desc,
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(struct usb_descriptor_header *)&fs_epin_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 *hs_audio_desc[] = {
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(struct usb_descriptor_header *)&iad_desc,
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(struct usb_descriptor_header *)&std_ac_if_desc,
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(struct usb_descriptor_header *)&ac_hdr_desc,
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(struct usb_descriptor_header *)&in_clk_src_desc,
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(struct usb_descriptor_header *)&out_clk_src_desc,
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(struct usb_descriptor_header *)&usb_out_it_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 *)&io_out_ot_fu_desc,
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(struct usb_descriptor_header *)&usb_in_ot_desc,
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(struct usb_descriptor_header *)&io_out_ot_desc,
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(struct usb_descriptor_header *)&std_as_out_if0_desc,
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(struct usb_descriptor_header *)&std_as_out_if1_desc,
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(struct usb_descriptor_header *)&as_out_hdr_desc,
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(struct usb_descriptor_header *)&as_out_fmt1_desc,
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(struct usb_descriptor_header *)&hs_epout_desc,
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(struct usb_descriptor_header *)&as_iso_out_desc,
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(struct usb_descriptor_header *)&std_as_in_if0_desc,
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(struct usb_descriptor_header *)&std_as_in_if1_desc,
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(struct usb_descriptor_header *)&as_in_hdr_desc,
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(struct usb_descriptor_header *)&as_in_fmt1_desc,
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(struct usb_descriptor_header *)&hs_epin_desc,
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(struct usb_descriptor_header *)&as_iso_in_desc,
|
NULL,
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};
|
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static struct usb_descriptor_header *ss_audio_desc[] = {
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(struct usb_descriptor_header *)&iad_desc,
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(struct usb_descriptor_header *)&std_ac_if_desc,
|
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(struct usb_descriptor_header *)&ac_hdr_desc,
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(struct usb_descriptor_header *)&in_clk_src_desc,
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(struct usb_descriptor_header *)&out_clk_src_desc,
|
(struct usb_descriptor_header *)&usb_out_it_desc,
|
(struct usb_descriptor_header *)&io_in_it_desc,
|
(struct usb_descriptor_header *)&usb_in_ot_fu_desc,
|
(struct usb_descriptor_header *)&io_out_ot_fu_desc,
|
(struct usb_descriptor_header *)&usb_in_ot_desc,
|
(struct usb_descriptor_header *)&io_out_ot_desc,
|
|
(struct usb_descriptor_header *)&std_as_out_if0_desc,
|
(struct usb_descriptor_header *)&std_as_out_if1_desc,
|
|
(struct usb_descriptor_header *)&as_out_hdr_desc,
|
(struct usb_descriptor_header *)&as_out_fmt1_desc,
|
(struct usb_descriptor_header *)&ss_epout_desc,
|
(struct usb_descriptor_header *)&ss_epout_desc_comp,
|
(struct usb_descriptor_header *)&as_iso_out_desc,
|
|
(struct usb_descriptor_header *)&std_as_in_if0_desc,
|
(struct usb_descriptor_header *)&std_as_in_if1_desc,
|
|
(struct usb_descriptor_header *)&as_in_hdr_desc,
|
(struct usb_descriptor_header *)&as_in_fmt1_desc,
|
(struct usb_descriptor_header *)&ss_epin_desc,
|
(struct usb_descriptor_header *)&ss_epin_desc_comp,
|
(struct usb_descriptor_header *)&as_iso_in_desc,
|
NULL,
|
};
|
|
struct cntrl_cur_lay2 {
|
__le16 dCUR;
|
};
|
|
struct cntrl_range_lay2 {
|
__le16 wNumSubRanges;
|
__le16 dMIN;
|
__le16 dMAX;
|
__le16 dRES;
|
} __packed;
|
|
struct cntrl_cur_lay3 {
|
__le32 dCUR;
|
};
|
|
struct cntrl_range_lay3 {
|
__le32 dMIN;
|
__le32 dMAX;
|
__le32 dRES;
|
} __packed;
|
|
#define ranges_size(c) (sizeof(c.wNumSubRanges) + c.wNumSubRanges \
|
* sizeof(struct cntrl_range_lay3))
|
struct cntrl_ranges_lay3 {
|
__u16 wNumSubRanges;
|
struct cntrl_range_lay3 r[UAC_MAX_RATES];
|
} __packed;
|
|
static int set_ep_max_packet_size(const struct f_uac_opts *uac2_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:
|
case USB_SPEED_SUPER:
|
max_size_ep = 1024;
|
factor = 8000;
|
break;
|
|
default:
|
return -EINVAL;
|
}
|
|
if (is_playback) {
|
chmask = uac2_opts->p_chmask;
|
for (i = 0; i < UAC_MAX_RATES; i++) {
|
if (uac2_opts->p_srate[i] == 0)
|
break;
|
if (uac2_opts->p_srate[i] > srate)
|
srate = uac2_opts->p_srate[i];
|
}
|
ssize = uac2_opts->p_ssize;
|
} else {
|
chmask = uac2_opts->c_chmask;
|
for (i = 0; i < UAC_MAX_RATES; i++) {
|
if (uac2_opts->c_srate[i] == 0)
|
break;
|
if (uac2_opts->c_srate[i] > srate)
|
srate = uac2_opts->c_srate[i];
|
}
|
ssize = uac2_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;
|
}
|
|
/* Use macro to overcome line length limitation */
|
#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:
|
epout_desc = &fs_epout_desc;
|
epin_desc = &fs_epin_desc;
|
break;
|
case USB_SPEED_HIGH:
|
epout_desc = &hs_epout_desc;
|
epin_desc = &hs_epin_desc;
|
break;
|
default:
|
epout_desc = &ss_epout_desc;
|
epin_desc = &ss_epin_desc;
|
epout_desc_comp = &ss_epout_desc_comp;
|
epin_desc_comp = &ss_epin_desc_comp;
|
}
|
|
i = 0;
|
headers[i++] = USBDHDR(&iad_desc);
|
headers[i++] = USBDHDR(&std_ac_if_desc);
|
headers[i++] = USBDHDR(&ac_hdr_desc);
|
if (EPIN_EN(opts))
|
headers[i++] = USBDHDR(&in_clk_src_desc);
|
if (EPOUT_EN(opts)) {
|
headers[i++] = USBDHDR(&out_clk_src_desc);
|
headers[i++] = USBDHDR(&usb_out_it_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)) {
|
if (EPOUT_FU(opts))
|
headers[i++] = USBDHDR(&io_out_ot_fu_desc);
|
headers[i++] = USBDHDR(&io_out_ot_desc);
|
headers[i++] = USBDHDR(&std_as_out_if0_desc);
|
headers[i++] = USBDHDR(&std_as_out_if1_desc);
|
headers[i++] = USBDHDR(&as_out_hdr_desc);
|
headers[i++] = USBDHDR(&as_out_fmt1_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(&std_as_in_if0_desc);
|
headers[i++] = USBDHDR(&std_as_in_if1_desc);
|
headers[i++] = USBDHDR(&as_in_hdr_desc);
|
headers[i++] = USBDHDR(&as_in_fmt1_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)
|
{
|
/* patch descriptors */
|
int i = 1; /* ID's start with 1 */
|
|
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 (EPOUT_EN(opts))
|
out_clk_src_desc.bClockID = i++;
|
if (EPIN_EN(opts))
|
in_clk_src_desc.bClockID = i++;
|
|
usb_out_it_desc.bCSourceID = out_clk_src_desc.bClockID;
|
if (EPIN_FU(opts)) {
|
usb_in_ot_fu_desc.bSourceID = io_in_it_desc.bTerminalID;
|
usb_in_ot_desc.bSourceID = usb_in_ot_fu_desc.bUnitID;
|
p_feature_unit.id = usb_in_ot_fu_desc.bUnitID;
|
} else {
|
usb_in_ot_desc.bSourceID = io_in_it_desc.bTerminalID;
|
}
|
usb_in_ot_desc.bCSourceID = in_clk_src_desc.bClockID;
|
io_in_it_desc.bCSourceID = in_clk_src_desc.bClockID;
|
io_out_ot_desc.bCSourceID = out_clk_src_desc.bClockID;
|
if (EPOUT_FU(opts)) {
|
io_out_ot_fu_desc.bSourceID = usb_out_it_desc.bTerminalID;
|
io_out_ot_desc.bSourceID = io_out_ot_fu_desc.bUnitID;
|
c_feature_unit.id = io_out_ot_fu_desc.bUnitID;
|
} else {
|
io_out_ot_desc.bSourceID = usb_out_it_desc.bTerminalID;
|
}
|
as_out_hdr_desc.bTerminalLink = usb_out_it_desc.bTerminalID;
|
as_in_hdr_desc.bTerminalLink = usb_in_ot_desc.bTerminalID;
|
|
iad_desc.bInterfaceCount = 1;
|
ac_hdr_desc.wTotalLength = sizeof ac_hdr_desc;
|
|
if (EPIN_EN(opts)) {
|
u16 len = le16_to_cpu(ac_hdr_desc.wTotalLength);
|
|
len += sizeof(in_clk_src_desc);
|
len += sizeof(usb_in_ot_desc);
|
if (EPIN_FU(opts))
|
len += sizeof(usb_in_ot_fu_desc);
|
len += sizeof(io_in_it_desc);
|
ac_hdr_desc.wTotalLength = cpu_to_le16(len);
|
iad_desc.bInterfaceCount++;
|
}
|
if (EPOUT_EN(opts)) {
|
u16 len = le16_to_cpu(ac_hdr_desc.wTotalLength);
|
|
len += sizeof(out_clk_src_desc);
|
len += sizeof(usb_out_it_desc);
|
if (EPOUT_FU(opts))
|
len += sizeof(io_out_ot_fu_desc);
|
len += sizeof(io_out_ot_desc);
|
ac_hdr_desc.wTotalLength = cpu_to_le16(len);
|
iad_desc.bInterfaceCount++;
|
}
|
|
setup_headers(opts, fs_audio_desc, USB_SPEED_FULL);
|
setup_headers(opts, hs_audio_desc, USB_SPEED_HIGH);
|
setup_headers(opts, ss_audio_desc, USB_SPEED_SUPER);
|
}
|
|
static int
|
afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
|
{
|
struct f_uac *uac2 = func_to_uac(fn);
|
struct g_audio *agdev = func_to_g_audio(fn);
|
struct usb_composite_dev *cdev = cfg->cdev;
|
struct usb_gadget *gadget = cdev->gadget;
|
struct device *dev = &gadget->dev;
|
struct f_uac_opts *uac2_opts;
|
struct usb_string *us;
|
int ret;
|
|
uac2_opts = container_of(fn->fi, struct f_uac_opts, func_inst);
|
|
us = usb_gstrings_attach(cdev, fn_strings, ARRAY_SIZE(strings_fn));
|
if (IS_ERR(us))
|
return PTR_ERR(us);
|
iad_desc.iFunction = us[STR_ASSOC].id;
|
std_ac_if_desc.iInterface = us[STR_IF_CTRL].id;
|
in_clk_src_desc.iClockSource = us[STR_CLKSRC_IN].id;
|
out_clk_src_desc.iClockSource = us[STR_CLKSRC_OUT].id;
|
usb_out_it_desc.iTerminal = us[STR_USB_IT].id;
|
io_in_it_desc.iTerminal = us[STR_IO_IT].id;
|
usb_in_ot_fu_desc.iFeature = us[STR_USB_OT_FU].id;
|
io_out_ot_fu_desc.iFeature = us[STR_IO_OT_FU].id;
|
usb_in_ot_desc.iTerminal = us[STR_USB_OT].id;
|
io_out_ot_desc.iTerminal = us[STR_IO_OT].id;
|
std_as_out_if0_desc.iInterface = us[STR_AS_OUT_ALT0].id;
|
std_as_out_if1_desc.iInterface = us[STR_AS_OUT_ALT1].id;
|
std_as_in_if0_desc.iInterface = us[STR_AS_IN_ALT0].id;
|
std_as_in_if1_desc.iInterface = us[STR_AS_IN_ALT1].id;
|
|
|
/* Initialize the configurable parameters */
|
usb_out_it_desc.bNrChannels = num_channels(uac2_opts->c_chmask);
|
usb_out_it_desc.bmChannelConfig = cpu_to_le32(uac2_opts->c_chmask);
|
io_in_it_desc.bNrChannels = num_channels(uac2_opts->p_chmask);
|
io_in_it_desc.bmChannelConfig = cpu_to_le32(uac2_opts->p_chmask);
|
as_out_hdr_desc.bNrChannels = num_channels(uac2_opts->c_chmask);
|
as_out_hdr_desc.bmChannelConfig = cpu_to_le32(uac2_opts->c_chmask);
|
as_in_hdr_desc.bNrChannels = num_channels(uac2_opts->p_chmask);
|
as_in_hdr_desc.bmChannelConfig = cpu_to_le32(uac2_opts->p_chmask);
|
as_out_fmt1_desc.bSubslotSize = uac2_opts->c_ssize;
|
as_out_fmt1_desc.bBitResolution = uac2_opts->c_ssize * 8;
|
as_in_fmt1_desc.bSubslotSize = uac2_opts->p_ssize;
|
as_in_fmt1_desc.bBitResolution = uac2_opts->p_ssize * 8;
|
|
ret = usb_interface_id(cfg, fn);
|
if (ret < 0) {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
return ret;
|
}
|
iad_desc.bFirstInterface = ret;
|
|
std_ac_if_desc.bInterfaceNumber = ret;
|
uac2->ac_intf = ret;
|
uac2->ac_alt = 0;
|
|
if (EPOUT_EN(uac2_opts)) {
|
ret = usb_interface_id(cfg, fn);
|
if (ret < 0) {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
return ret;
|
}
|
std_as_out_if0_desc.bInterfaceNumber = ret;
|
std_as_out_if1_desc.bInterfaceNumber = ret;
|
uac2->as_out_intf = ret;
|
uac2->as_out_alt = 0;
|
}
|
|
if (EPIN_EN(uac2_opts)) {
|
ret = usb_interface_id(cfg, fn);
|
if (ret < 0) {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
return ret;
|
}
|
std_as_in_if0_desc.bInterfaceNumber = ret;
|
std_as_in_if1_desc.bInterfaceNumber = ret;
|
uac2->as_in_intf = ret;
|
uac2->as_in_alt = 0;
|
}
|
|
/* Calculate wMaxPacketSize according to audio bandwidth */
|
ret = set_ep_max_packet_size(uac2_opts, &fs_epin_desc, USB_SPEED_FULL,
|
true);
|
if (ret < 0) {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
return ret;
|
}
|
|
ret = set_ep_max_packet_size(uac2_opts, &fs_epout_desc, USB_SPEED_FULL,
|
false);
|
if (ret < 0) {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
return ret;
|
}
|
|
ret = set_ep_max_packet_size(uac2_opts, &hs_epin_desc, USB_SPEED_HIGH,
|
true);
|
if (ret < 0) {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
return ret;
|
}
|
|
ret = set_ep_max_packet_size(uac2_opts, &hs_epout_desc, USB_SPEED_HIGH,
|
false);
|
if (ret < 0) {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
return ret;
|
}
|
|
ret = set_ep_max_packet_size(uac2_opts, &ss_epin_desc, USB_SPEED_SUPER,
|
true);
|
if (ret < 0) {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
return ret;
|
}
|
|
ss_epin_desc_comp.wBytesPerInterval = ss_epin_desc.wMaxPacketSize;
|
|
ret = set_ep_max_packet_size(uac2_opts, &ss_epout_desc, USB_SPEED_SUPER,
|
false);
|
if (ret < 0) {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
return ret;
|
}
|
|
ss_epout_desc_comp.wBytesPerInterval = ss_epout_desc.wMaxPacketSize;
|
|
if (EPOUT_EN(uac2_opts)) {
|
agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc);
|
if (!agdev->out_ep) {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
return -ENODEV;
|
}
|
}
|
|
if (EPIN_EN(uac2_opts)) {
|
agdev->in_ep = usb_ep_autoconfig(gadget, &fs_epin_desc);
|
if (!agdev->in_ep) {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
return -ENODEV;
|
}
|
agdev->in_ep->maxpacket = usb_endpoint_maxp(&fs_epin_desc);
|
}
|
|
agdev->in_ep_maxpsize = max_t(u16,
|
le16_to_cpu(fs_epin_desc.wMaxPacketSize),
|
le16_to_cpu(hs_epin_desc.wMaxPacketSize));
|
agdev->out_ep_maxpsize = max_t(u16,
|
le16_to_cpu(fs_epout_desc.wMaxPacketSize),
|
le16_to_cpu(hs_epout_desc.wMaxPacketSize));
|
|
agdev->in_ep_maxpsize = max_t(u16, agdev->in_ep_maxpsize,
|
le16_to_cpu(ss_epin_desc.wMaxPacketSize));
|
agdev->out_ep_maxpsize = max_t(u16, agdev->out_ep_maxpsize,
|
le16_to_cpu(ss_epout_desc.wMaxPacketSize));
|
|
hs_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress;
|
hs_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress;
|
ss_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress;
|
ss_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress;
|
|
setup_descriptor(uac2_opts);
|
|
ret = usb_assign_descriptors(fn, fs_audio_desc, hs_audio_desc, ss_audio_desc,
|
ss_audio_desc);
|
if (ret)
|
return ret;
|
|
agdev->gadget = gadget;
|
|
agdev->params.p_chmask = uac2_opts->p_chmask;
|
memcpy(agdev->params.p_srate, uac2_opts->p_srate,
|
sizeof(agdev->params.p_srate));
|
agdev->params.p_srate_active = uac2_opts->p_srate_active;
|
agdev->params.p_ssize = uac2_opts->p_ssize;
|
agdev->params.c_chmask = uac2_opts->c_chmask;
|
memcpy(agdev->params.c_srate, uac2_opts->c_srate,
|
sizeof(agdev->params.c_srate));
|
agdev->params.c_srate_active = uac2_opts->c_srate_active;
|
agdev->params.c_ssize = uac2_opts->c_ssize;
|
agdev->params.req_number = uac2_opts->req_number;
|
ret = g_audio_setup(agdev, "UAC2 PCM", "UAC2_Gadget");
|
if (ret)
|
goto err_free_descs;
|
return 0;
|
|
err_free_descs:
|
usb_free_all_descriptors(fn);
|
agdev->gadget = NULL;
|
return ret;
|
}
|
|
static int
|
afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt)
|
{
|
struct usb_composite_dev *cdev = fn->config->cdev;
|
struct f_uac *uac2 = func_to_uac(fn);
|
struct usb_gadget *gadget = cdev->gadget;
|
struct device *dev = &gadget->dev;
|
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 == uac2->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 == uac2->as_out_intf) {
|
uac2->as_out_alt = alt;
|
|
if (alt)
|
ret = u_audio_start_capture(&uac2->g_audio);
|
else
|
u_audio_stop_capture(&uac2->g_audio);
|
} else if (intf == uac2->as_in_intf) {
|
uac2->as_in_alt = alt;
|
|
if (alt)
|
ret = u_audio_start_playback(&uac2->g_audio);
|
else
|
u_audio_stop_playback(&uac2->g_audio);
|
} else {
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
|
return -EINVAL;
|
}
|
|
return ret;
|
}
|
|
static int
|
afunc_get_alt(struct usb_function *fn, unsigned intf)
|
{
|
struct f_uac *uac2 = func_to_uac(fn);
|
struct g_audio *agdev = func_to_g_audio(fn);
|
|
if (intf == uac2->ac_intf)
|
return uac2->ac_alt;
|
else if (intf == uac2->as_out_intf)
|
return uac2->as_out_alt;
|
else if (intf == uac2->as_in_intf)
|
return uac2->as_in_alt;
|
else
|
dev_err(&agdev->gadget->dev,
|
"%s:%d Invalid Interface %d!\n",
|
__func__, __LINE__, intf);
|
|
return -EINVAL;
|
}
|
|
static void
|
afunc_disable(struct usb_function *fn)
|
{
|
struct f_uac *uac2 = func_to_uac(fn);
|
|
uac2->as_in_alt = 0;
|
uac2->as_out_alt = 0;
|
u_audio_stop_capture(&uac2->g_audio);
|
u_audio_stop_playback(&uac2->g_audio);
|
}
|
|
static int
|
in_rq_cs_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
|
{
|
struct usb_request *req = fn->config->cdev->req;
|
struct g_audio *agdev = func_to_g_audio(fn);
|
struct f_uac_opts *opts;
|
u16 w_length = le16_to_cpu(cr->wLength);
|
u16 w_index = le16_to_cpu(cr->wIndex);
|
u16 w_value = le16_to_cpu(cr->wValue);
|
u8 entity_id = (w_index >> 8) & 0xff;
|
u8 control_selector = w_value >> 8;
|
int value = -EOPNOTSUPP;
|
int p_srate, c_srate;
|
|
opts = g_audio_to_uac_opts(agdev);
|
p_srate = opts->p_srate_active;
|
c_srate = opts->c_srate_active;
|
|
if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
|
struct cntrl_cur_lay3 c;
|
memset(&c, 0, sizeof(struct cntrl_cur_lay3));
|
|
if (entity_id == USB_IN_CLK_ID)
|
c.dCUR = cpu_to_le32(p_srate);
|
else if (entity_id == USB_OUT_CLK_ID)
|
c.dCUR = cpu_to_le32(c_srate);
|
|
DBG(fn->config->cdev, "%s(): %d\n", __func__, c.dCUR);
|
value = min_t(unsigned, w_length, sizeof c);
|
memcpy(req->buf, &c, value);
|
} else if (control_selector == UAC2_CS_CONTROL_CLOCK_VALID) {
|
*(u8 *)req->buf = 1;
|
value = min_t(unsigned, w_length, 1);
|
} else {
|
dev_err(&agdev->gadget->dev,
|
"%s:%d control_selector=%d TODO!\n",
|
__func__, __LINE__, control_selector);
|
}
|
|
return value;
|
}
|
|
static int
|
in_rq_cs_range(struct usb_function *fn, const struct usb_ctrlrequest *cr)
|
{
|
struct usb_request *req = fn->config->cdev->req;
|
struct g_audio *agdev = func_to_g_audio(fn);
|
struct f_uac_opts *opts;
|
u16 w_length = le16_to_cpu(cr->wLength);
|
u16 w_index = le16_to_cpu(cr->wIndex);
|
u16 w_value = le16_to_cpu(cr->wValue);
|
u8 entity_id = (w_index >> 8) & 0xff;
|
u8 control_selector = w_value >> 8;
|
struct cntrl_ranges_lay3 rs;
|
int value = -EOPNOTSUPP;
|
int srate = 0;
|
int i;
|
|
opts = g_audio_to_uac_opts(agdev);
|
|
if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
|
rs.wNumSubRanges = 0;
|
for (i = 0; i < UAC_MAX_RATES; i++) {
|
if (entity_id == USB_IN_CLK_ID)
|
srate = opts->p_srate[i];
|
else if (entity_id == USB_OUT_CLK_ID)
|
srate = opts->c_srate[i];
|
else
|
return -EOPNOTSUPP;
|
|
if (srate == 0)
|
break;
|
|
rs.r[rs.wNumSubRanges].dMIN = srate;
|
rs.r[rs.wNumSubRanges].dMAX = srate;
|
rs.r[rs.wNumSubRanges].dRES = 0;
|
rs.wNumSubRanges++;
|
DBG(fn->config->cdev,
|
"%s(): clk %d: report rate %d. %d\n",
|
__func__, entity_id, rs.wNumSubRanges,
|
srate);
|
}
|
|
value = min_t(unsigned int, w_length, ranges_size(rs));
|
DBG(fn->config->cdev, "%s(): send %d rates, size %d\n",
|
__func__, rs.wNumSubRanges, value);
|
memcpy(req->buf, &rs, value);
|
} else {
|
dev_err(&agdev->gadget->dev,
|
"%s:%d control_selector=%d TODO!\n",
|
__func__, __LINE__, control_selector);
|
}
|
|
return value;
|
}
|
|
static int
|
in_rq_fu(struct usb_function *fn, const struct usb_ctrlrequest *cr)
|
{
|
struct f_uac *uac2 = func_to_uac(fn);
|
struct usb_request *req = fn->config->cdev->req;
|
u16 w_length = le16_to_cpu(cr->wLength);
|
struct usb_audio_control *con = uac2->get_con;
|
u8 cmd = uac2->get_cmd;
|
char c1;
|
struct cntrl_cur_lay2 c2;
|
struct cntrl_range_lay2 r;
|
int value = -EOPNOTSUPP;
|
|
if (cmd == UAC2_CS_CUR && con->type == UAC_FU_MUTE) {
|
c1 = con->get(con, UAC__CUR);
|
value = min_t(unsigned int, w_length, 1);
|
memcpy(req->buf, &c1, value);
|
} else if (cmd == UAC2_CS_CUR && con->type == UAC_FU_VOLUME) {
|
c2.dCUR = cpu_to_le16(con->get(con, UAC__CUR));
|
value = min_t(unsigned int, w_length, sizeof(c2));
|
memcpy(req->buf, &c2, value);
|
} else if (cmd == UAC2_CS_RANGE) {
|
r.wNumSubRanges = cpu_to_le16(1);
|
r.dMIN = cpu_to_le16(con->get(con, UAC__MIN));
|
r.dMAX = cpu_to_le16(con->get(con, UAC__MAX));
|
r.dRES = cpu_to_le16(con->get(con, UAC__RES));
|
value = min_t(unsigned int, w_length, sizeof(r));
|
memcpy(req->buf, &r, value);
|
}
|
|
DBG(fn->config->cdev, "%s(): send size %d\n", __func__, value);
|
|
return value;
|
}
|
|
static void uac2_fu_control_complt(struct usb_ep *ep, struct usb_request *req)
|
{
|
struct f_uac *uac2 = req->context;
|
struct usb_audio_control *con = uac2->set_con;
|
u8 cmd = uac2->set_cmd;
|
int status = req->status;
|
char c1;
|
struct cntrl_cur_lay2 c2;
|
struct cntrl_range_lay2 r;
|
|
switch (status) {
|
case 0: /* normal completion? */
|
if (!con)
|
break;
|
|
if (cmd == UAC2_CS_CUR && con->type == UAC_FU_MUTE) {
|
memcpy(&c1, req->buf, 1);
|
con->set(con, UAC__CUR, c1);
|
} else if (cmd == UAC2_CS_CUR && con->type == UAC_FU_VOLUME) {
|
memcpy(&c2, req->buf, sizeof(c2));
|
con->set(con, UAC__CUR, le16_to_cpu(c2.dCUR));
|
} else if (cmd == UAC2_CS_RANGE) {
|
memcpy(&r, req->buf, sizeof(r));
|
con->set(con, UAC__MIN, le16_to_cpu(r.dMIN));
|
con->set(con, UAC__MAX, le16_to_cpu(r.dMAX));
|
con->set(con, UAC__RES, le16_to_cpu(r.dRES));
|
}
|
|
uac2->set_con = NULL;
|
break;
|
default:
|
break;
|
}
|
}
|
|
static int
|
ac_rq_in(struct usb_function *fn, const struct usb_ctrlrequest *cr)
|
{
|
struct f_uac *uac2 = func_to_uac(fn);
|
struct usb_composite_dev *cdev = fn->config->cdev;
|
struct usb_request *req = cdev->req;
|
u8 id = ((le16_to_cpu(cr->wIndex) >> 8) & 0xFF);
|
u16 len = le16_to_cpu(cr->wLength);
|
u16 w_value = le16_to_cpu(cr->wValue);
|
u8 con_sel = (w_value >> 8) & 0xFF;
|
u8 cmd = (cr->bRequest & 0x0F);
|
struct usb_audio_control_selector *cs;
|
struct usb_audio_control *con;
|
|
DBG(cdev, "bRequest in 0x%x, w_value 0x%04x, len %d, entity %d\n",
|
cr->bRequest, w_value, len, id);
|
|
if (id == USB_OUT_CLK_ID || id == USB_IN_CLK_ID) {
|
if (cr->bRequest == UAC2_CS_CUR)
|
return in_rq_cs_cur(fn, cr);
|
else if (cr->bRequest == UAC2_CS_RANGE)
|
return in_rq_cs_range(fn, cr);
|
}
|
|
list_for_each_entry(cs, &uac2->cs, list)
|
if (cs->id == id)
|
list_for_each_entry(con, &cs->control, list)
|
if (con->type == con_sel) {
|
req->context = uac2;
|
uac2->get_con = con;
|
uac2->get_cmd = cmd;
|
req->complete = uac2_fu_control_complt;
|
return in_rq_fu(fn, cr);
|
}
|
|
return -EOPNOTSUPP;
|
}
|
|
static void uac2_cs_control_sam_freq(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 *uac2 = func_to_uac(fn);
|
struct f_uac_opts *opts = g_audio_to_uac_opts(agdev);
|
u32 val;
|
|
if (req->actual != 4) {
|
WARN(cdev, "Invalid data size for UAC2_CS_CONTROL_SAM_FREQ.\n");
|
return;
|
}
|
|
val = le32_to_cpu(*((u32 *)req->buf));
|
if (uac2->ctl_id == USB_IN_CLK_ID) {
|
opts->p_srate_active = val;
|
u_audio_set_playback_srate(agdev, opts->p_srate_active);
|
} else if (uac2->ctl_id == USB_OUT_CLK_ID) {
|
opts->c_srate_active = val;
|
u_audio_set_capture_srate(agdev, opts->c_srate_active);
|
}
|
}
|
|
static int
|
out_rq_cs_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
|
{
|
struct usb_composite_dev *cdev = fn->config->cdev;
|
struct usb_request *req = cdev->req;
|
u16 w_length = le16_to_cpu(cr->wLength);
|
struct f_uac *uac2 = func_to_uac(fn);
|
u16 w_value = le16_to_cpu(cr->wValue);
|
u16 w_index = le16_to_cpu(cr->wIndex);
|
u8 control_selector = w_value >> 8;
|
u8 clock_id = w_index >> 8;
|
|
if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
|
DBG(cdev, "control_selector UAC2_CS_CONTROL_SAM_FREQ, clock: %d\n",
|
clock_id);
|
cdev->gadget->ep0->driver_data = fn;
|
uac2->ctl_id = clock_id;
|
req->complete = uac2_cs_control_sam_freq;
|
return w_length;
|
}
|
|
return -EOPNOTSUPP;
|
}
|
|
static int
|
ac_rq_out(struct usb_function *fn, const struct usb_ctrlrequest *cr)
|
{
|
struct f_uac *uac2 = func_to_uac(fn);
|
struct usb_composite_dev *cdev = fn->config->cdev;
|
struct usb_request *req = cdev->req;
|
u16 w_index = le16_to_cpu(cr->wIndex);
|
u16 w_value = le16_to_cpu(cr->wValue);
|
u16 w_length = le16_to_cpu(cr->wLength);
|
u8 id = (w_index >> 8) & 0xff;
|
u8 con_sel = (w_value >> 8) & 0xff;
|
u8 cmd = (cr->bRequest & 0x0f);
|
struct usb_audio_control_selector *cs;
|
struct usb_audio_control *con;
|
|
DBG(cdev, "bRequest out 0x%x, w_value 0x%04x, len %d, entity %d\n",
|
cr->bRequest, w_value, w_length, id);
|
|
if (id == USB_OUT_CLK_ID || id == USB_IN_CLK_ID) {
|
if (cr->bRequest == UAC2_CS_CUR)
|
return out_rq_cs_cur(fn, cr);
|
}
|
|
list_for_each_entry(cs, &uac2->cs, list)
|
if (cs->id == id)
|
list_for_each_entry(con, &cs->control, list)
|
if (con->type == con_sel) {
|
req->context = uac2;
|
uac2->set_con = con;
|
uac2->set_cmd = cmd;
|
req->complete = uac2_fu_control_complt;
|
return w_length;
|
}
|
|
return -EOPNOTSUPP;
|
}
|
|
static int
|
setup_rq_inf(struct usb_function *fn, const struct usb_ctrlrequest *cr)
|
{
|
struct f_uac *uac2 = func_to_uac(fn);
|
struct g_audio *agdev = func_to_g_audio(fn);
|
u16 w_index = le16_to_cpu(cr->wIndex);
|
u8 intf = w_index & 0xff;
|
|
if (intf != uac2->ac_intf) {
|
dev_err(&agdev->gadget->dev,
|
"%s:%d Error!\n", __func__, __LINE__);
|
return -EOPNOTSUPP;
|
}
|
|
if (cr->bRequestType & USB_DIR_IN)
|
return ac_rq_in(fn, cr);
|
else
|
return ac_rq_out(fn, cr);
|
}
|
|
static int
|
afunc_setup(struct usb_function *fn, const struct usb_ctrlrequest *cr)
|
{
|
struct usb_composite_dev *cdev = fn->config->cdev;
|
struct g_audio *agdev = func_to_g_audio(fn);
|
struct usb_request *req = cdev->req;
|
u16 w_length = le16_to_cpu(cr->wLength);
|
int value = -EOPNOTSUPP;
|
|
/* Only Class specific requests are supposed to reach here */
|
if ((cr->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS)
|
return -EOPNOTSUPP;
|
|
if ((cr->bRequestType & USB_RECIP_MASK) == USB_RECIP_INTERFACE)
|
value = setup_rq_inf(fn, cr);
|
else
|
dev_err(&agdev->gadget->dev, "%s:%d Error!\n",
|
__func__, __LINE__);
|
|
if (value >= 0) {
|
req->length = value;
|
req->zero = value < w_length;
|
value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
|
if (value < 0) {
|
dev_err(&agdev->gadget->dev,
|
"%s:%d Error!\n", __func__, __LINE__);
|
req->status = 0;
|
}
|
}
|
|
return value;
|
}
|
|
static struct configfs_item_operations f_uac2_item_ops = {
|
.release = f_uac_attr_release,
|
};
|
|
UAC_ATTRIBUTE(p_chmask);
|
UAC_ATTRIBUTE(p_ssize);
|
UAC_ATTRIBUTE(p_feature_unit);
|
UAC_ATTRIBUTE(c_chmask);
|
UAC_ATTRIBUTE(c_ssize);
|
UAC_ATTRIBUTE(c_feature_unit);
|
UAC_ATTRIBUTE(req_number);
|
|
UAC_RATE_ATTRIBUTE(p_srate);
|
UAC_RATE_ATTRIBUTE(c_srate);
|
|
static struct configfs_attribute *f_uac2_attrs[] = {
|
&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_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_req_number,
|
NULL,
|
};
|
|
static const struct config_item_type f_uac2_func_type = {
|
.ct_item_ops = &f_uac2_item_ops,
|
.ct_attrs = f_uac2_attrs,
|
.ct_owner = THIS_MODULE,
|
};
|
|
static void afunc_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 *afunc_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 = afunc_free_inst;
|
|
config_group_init_type_name(&opts->func_inst.group, "",
|
&f_uac2_func_type);
|
|
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->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->req_number = UAC_DEF_REQ_NUM;
|
return &opts->func_inst;
|
}
|
|
static void afunc_free(struct usb_function *f)
|
{
|
struct g_audio *agdev;
|
struct f_uac_opts *opts;
|
|
agdev = func_to_g_audio(f);
|
opts = container_of(f->fi, struct f_uac_opts, func_inst);
|
kfree(agdev);
|
mutex_lock(&opts->lock);
|
--opts->refcnt;
|
mutex_unlock(&opts->lock);
|
}
|
|
static void afunc_unbind(struct usb_configuration *c, struct usb_function *f)
|
{
|
struct g_audio *agdev = func_to_g_audio(f);
|
|
g_audio_cleanup(agdev);
|
usb_free_all_descriptors(f);
|
|
agdev->gadget = NULL;
|
}
|
|
/* Todo: add more control selecotor dynamically */
|
static int control_selector_init(struct f_uac *uac2)
|
{
|
INIT_LIST_HEAD(&uac2->cs);
|
|
/* playback feature unit */
|
list_add(&p_feature_unit.list, &uac2->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 = &uac2->g_audio;
|
p_mute_control.context = &uac2->g_audio;
|
|
/* capture feature unit */
|
list_add(&c_feature_unit.list, &uac2->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 = &uac2->g_audio;
|
c_mute_control.context = &uac2->g_audio;
|
|
return 0;
|
}
|
|
|
static struct usb_function *afunc_alloc(struct usb_function_instance *fi)
|
{
|
struct f_uac *uac2;
|
struct f_uac_opts *opts;
|
|
uac2 = kzalloc(sizeof(*uac2), GFP_KERNEL);
|
if (uac2 == NULL)
|
return ERR_PTR(-ENOMEM);
|
|
opts = container_of(fi, struct f_uac_opts, func_inst);
|
mutex_lock(&opts->lock);
|
++opts->refcnt;
|
mutex_unlock(&opts->lock);
|
|
uac2->g_audio.func.name = "uac2_func";
|
uac2->g_audio.func.bind = afunc_bind;
|
uac2->g_audio.func.unbind = afunc_unbind;
|
uac2->g_audio.func.set_alt = afunc_set_alt;
|
uac2->g_audio.func.get_alt = afunc_get_alt;
|
uac2->g_audio.func.disable = afunc_disable;
|
uac2->g_audio.func.setup = afunc_setup;
|
uac2->g_audio.func.free_func = afunc_free;
|
|
control_selector_init(uac2);
|
|
return &uac2->g_audio.func;
|
}
|
|
DECLARE_USB_FUNCTION_INIT(uac2, afunc_alloc_inst, afunc_alloc);
|
MODULE_LICENSE("GPL");
|
MODULE_AUTHOR("Yadwinder Singh");
|
MODULE_AUTHOR("Jaswinder Singh");
|
