1755 lines
48 KiB
C
1755 lines
48 KiB
C
// 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) 2021 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_uac1.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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#define USB_OUT_FU_ID (out_feature_unit_desc->bUnitID)
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#define USB_IN_FU_ID (in_feature_unit_desc->bUnitID)
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#define EPIN_EN(_opts) ((_opts)->p_chmask != 0)
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#define EPOUT_EN(_opts) ((_opts)->c_chmask != 0)
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#define FUIN_EN(_opts) ((_opts)->p_mute_present \
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|| (_opts)->p_volume_present)
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#define FUOUT_EN(_opts) ((_opts)->c_mute_present \
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|| (_opts)->c_volume_present)
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struct f_uac1 {
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struct g_audio g_audio;
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u8 ac_intf, as_in_intf, as_out_intf;
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u8 ac_alt, as_in_alt, as_out_alt; /* needed for get_alt() */
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struct usb_ctrlrequest setup_cr; /* will be used in data stage */
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/* Interrupt IN endpoint of AC interface */
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struct usb_ep *int_ep;
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atomic_t int_count;
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int ctl_id; /* EP id */
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int c_srate; /* current capture srate */
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int p_srate; /* current playback prate */
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};
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static inline struct f_uac1 *func_to_uac1(struct usb_function *f)
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{
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return container_of(f, struct f_uac1, g_audio.func);
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}
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static inline struct f_uac1_opts *g_audio_to_uac1_opts(struct g_audio *audio)
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{
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return container_of(audio->func.fi, struct f_uac1_opts, func_inst);
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}
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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
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* ALSA_Playback -> IT_3 -> OT_4 -> USB-IN
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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 = DYNAMIC */
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.bInterfaceClass = USB_CLASS_AUDIO,
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.bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL,
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};
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/* B.3.2 Class-Specific AC Interface Descriptor */
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static struct uac1_ac_header_descriptor *ac_header_desc;
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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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/* .bTerminalID = DYNAMIC */
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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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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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/* .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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};
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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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/* .bTerminalID = DYNAMIC */
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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 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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/* .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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};
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static struct uac_feature_unit_descriptor *in_feature_unit_desc;
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static struct uac_feature_unit_descriptor *out_feature_unit_desc;
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/* AC IN Interrupt Endpoint */
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static struct usb_endpoint_descriptor ac_int_ep_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_INT,
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.wMaxPacketSize = cpu_to_le16(2),
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.bInterval = 4,
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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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/* .bTerminalLink = DYNAMIC */
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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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/* .bTerminalLink = DYNAMIC */
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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 = cpu_to_le16(UAC1_OUT_EP_MAX_PACKET_SIZE),
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.bInterval = 4,
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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 = cpu_to_le16(UAC1_OUT_EP_MAX_PACKET_SIZE),
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.bInterval = 4,
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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 *)&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_desc,
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(struct usb_descriptor_header *)&out_feature_unit_desc,
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(struct usb_descriptor_header *)&io_in_it_desc,
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(struct usb_descriptor_header *)&usb_in_ot_desc,
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(struct usb_descriptor_header *)&in_feature_unit_desc,
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(struct usb_descriptor_header *)&ac_int_ep_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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enum {
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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,
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STR_IO_IN_IT,
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STR_IO_IN_IT_CH_NAMES,
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STR_USB_IN_OT,
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STR_FU_IN,
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STR_FU_OUT,
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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,
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};
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static struct usb_string strings_uac1[] = {
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/* [STR_AC_IF].s = DYNAMIC, */
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[STR_USB_OUT_IT].s = "Playback Input terminal",
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[STR_USB_OUT_IT_CH_NAMES].s = "Playback Channels",
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[STR_IO_OUT_OT].s = "Playback Output terminal",
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[STR_IO_IN_IT].s = "Capture Input terminal",
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[STR_IO_IN_IT_CH_NAMES].s = "Capture Channels",
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[STR_USB_IN_OT].s = "Capture Output terminal",
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[STR_FU_IN].s = "Capture Volume",
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[STR_FU_OUT].s = "Playback Volume",
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[STR_AS_OUT_IF_ALT0].s = "Playback Inactive",
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[STR_AS_OUT_IF_ALT1].s = "Playback Active",
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[STR_AS_IN_IF_ALT0].s = "Capture Inactive",
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[STR_AS_IN_IF_ALT1].s = "Capture Active",
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{ },
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};
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static struct usb_gadget_strings str_uac1 = {
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.language = 0x0409, /* en-us */
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.strings = strings_uac1,
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};
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static struct usb_gadget_strings *uac1_strings[] = {
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&str_uac1,
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NULL,
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};
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/*
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* This function is an ALSA sound card following USB Audio Class Spec 1.0.
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*/
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static void uac_cs_attr_sample_rate(struct usb_ep *ep, struct usb_request *req)
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{
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struct usb_function *fn = ep->driver_data;
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struct usb_composite_dev *cdev = fn->config->cdev;
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struct g_audio *agdev = func_to_g_audio(fn);
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struct f_uac1 *uac1 = func_to_uac1(fn);
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u8 *buf = (u8 *)req->buf;
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u32 val = 0;
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if (req->actual != 3) {
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WARN(cdev, "Invalid data size for UAC_EP_CS_ATTR_SAMPLE_RATE.\n");
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return;
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}
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val = buf[0] | (buf[1] << 8) | (buf[2] << 16);
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if (uac1->ctl_id == (USB_DIR_IN | 2)) {
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uac1->p_srate = val;
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u_audio_set_playback_srate(agdev, uac1->p_srate);
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} else if (uac1->ctl_id == (USB_DIR_OUT | 1)) {
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uac1->c_srate = val;
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u_audio_set_capture_srate(agdev, uac1->c_srate);
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}
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}
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static void audio_notify_complete(struct usb_ep *_ep, struct usb_request *req)
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{
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struct g_audio *audio = req->context;
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struct f_uac1 *uac1 = func_to_uac1(&audio->func);
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atomic_dec(&uac1->int_count);
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kfree(req->buf);
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usb_ep_free_request(_ep, req);
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}
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static int audio_notify(struct g_audio *audio, int unit_id, int cs)
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{
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struct f_uac1 *uac1 = func_to_uac1(&audio->func);
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struct usb_request *req;
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struct uac1_status_word *msg;
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int ret;
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if (!uac1->int_ep->enabled)
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return 0;
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if (atomic_inc_return(&uac1->int_count) > UAC1_DEF_INT_REQ_NUM) {
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atomic_dec(&uac1->int_count);
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return 0;
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}
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req = usb_ep_alloc_request(uac1->int_ep, GFP_ATOMIC);
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if (req == NULL) {
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ret = -ENOMEM;
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goto err_dec_int_count;
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}
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msg = kmalloc(sizeof(*msg), GFP_ATOMIC);
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if (msg == NULL) {
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ret = -ENOMEM;
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goto err_free_request;
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}
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msg->bStatusType = UAC1_STATUS_TYPE_IRQ_PENDING
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| UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF;
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msg->bOriginator = unit_id;
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req->length = sizeof(*msg);
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req->buf = msg;
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req->context = audio;
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req->complete = audio_notify_complete;
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ret = usb_ep_queue(uac1->int_ep, req, GFP_ATOMIC);
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if (ret)
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goto err_free_msg;
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return 0;
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err_free_msg:
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kfree(msg);
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err_free_request:
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usb_ep_free_request(uac1->int_ep, req);
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err_dec_int_count:
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atomic_dec(&uac1->int_count);
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return ret;
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}
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static int
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in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
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{
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struct usb_request *req = fn->config->cdev->req;
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struct g_audio *audio = func_to_g_audio(fn);
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struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
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u16 w_length = le16_to_cpu(cr->wLength);
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u16 w_index = le16_to_cpu(cr->wIndex);
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u16 w_value = le16_to_cpu(cr->wValue);
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u8 entity_id = (w_index >> 8) & 0xff;
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u8 control_selector = w_value >> 8;
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int value = -EOPNOTSUPP;
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if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
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(FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
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unsigned int is_playback = 0;
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if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
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is_playback = 1;
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if (control_selector == UAC_FU_MUTE) {
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unsigned int mute;
|
|
|
|
u_audio_get_mute(audio, is_playback, &mute);
|
|
|
|
*(u8 *)req->buf = mute;
|
|
value = min_t(unsigned int, w_length, 1);
|
|
} else if (control_selector == UAC_FU_VOLUME) {
|
|
__le16 c;
|
|
s16 volume;
|
|
|
|
u_audio_get_volume(audio, is_playback, &volume);
|
|
|
|
c = cpu_to_le16(volume);
|
|
|
|
value = min_t(unsigned int, w_length, sizeof(c));
|
|
memcpy(req->buf, &c, value);
|
|
} else {
|
|
dev_err(&audio->gadget->dev,
|
|
"%s:%d control_selector=%d TODO!\n",
|
|
__func__, __LINE__, control_selector);
|
|
}
|
|
} else {
|
|
dev_err(&audio->gadget->dev,
|
|
"%s:%d entity_id=%d control_selector=%d TODO!\n",
|
|
__func__, __LINE__, entity_id, control_selector);
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|
|
static int
|
|
in_rq_min(struct usb_function *fn, const struct usb_ctrlrequest *cr)
|
|
{
|
|
struct usb_request *req = fn->config->cdev->req;
|
|
struct g_audio *audio = func_to_g_audio(fn);
|
|
struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
|
|
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;
|
|
|
|
if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
|
|
(FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
|
|
unsigned int is_playback = 0;
|
|
|
|
if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
|
|
is_playback = 1;
|
|
|
|
if (control_selector == UAC_FU_VOLUME) {
|
|
__le16 r;
|
|
s16 min_db;
|
|
|
|
if (is_playback)
|
|
min_db = opts->p_volume_min;
|
|
else
|
|
min_db = opts->c_volume_min;
|
|
|
|
r = cpu_to_le16(min_db);
|
|
|
|
value = min_t(unsigned int, w_length, sizeof(r));
|
|
memcpy(req->buf, &r, value);
|
|
} else {
|
|
dev_err(&audio->gadget->dev,
|
|
"%s:%d control_selector=%d TODO!\n",
|
|
__func__, __LINE__, control_selector);
|
|
}
|
|
} else {
|
|
dev_err(&audio->gadget->dev,
|
|
"%s:%d entity_id=%d control_selector=%d TODO!\n",
|
|
__func__, __LINE__, entity_id, control_selector);
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|
|
static int
|
|
in_rq_max(struct usb_function *fn, const struct usb_ctrlrequest *cr)
|
|
{
|
|
struct usb_request *req = fn->config->cdev->req;
|
|
struct g_audio *audio = func_to_g_audio(fn);
|
|
struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
|
|
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;
|
|
|
|
if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
|
|
(FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
|
|
unsigned int is_playback = 0;
|
|
|
|
if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
|
|
is_playback = 1;
|
|
|
|
if (control_selector == UAC_FU_VOLUME) {
|
|
__le16 r;
|
|
s16 max_db;
|
|
|
|
if (is_playback)
|
|
max_db = opts->p_volume_max;
|
|
else
|
|
max_db = opts->c_volume_max;
|
|
|
|
r = cpu_to_le16(max_db);
|
|
|
|
value = min_t(unsigned int, w_length, sizeof(r));
|
|
memcpy(req->buf, &r, value);
|
|
} else {
|
|
dev_err(&audio->gadget->dev,
|
|
"%s:%d control_selector=%d TODO!\n",
|
|
__func__, __LINE__, control_selector);
|
|
}
|
|
} else {
|
|
dev_err(&audio->gadget->dev,
|
|
"%s:%d entity_id=%d control_selector=%d TODO!\n",
|
|
__func__, __LINE__, entity_id, control_selector);
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|
|
static int
|
|
in_rq_res(struct usb_function *fn, const struct usb_ctrlrequest *cr)
|
|
{
|
|
struct usb_request *req = fn->config->cdev->req;
|
|
struct g_audio *audio = func_to_g_audio(fn);
|
|
struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
|
|
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;
|
|
|
|
if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
|
|
(FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
|
|
unsigned int is_playback = 0;
|
|
|
|
if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
|
|
is_playback = 1;
|
|
|
|
if (control_selector == UAC_FU_VOLUME) {
|
|
__le16 r;
|
|
s16 res_db;
|
|
|
|
if (is_playback)
|
|
res_db = opts->p_volume_res;
|
|
else
|
|
res_db = opts->c_volume_res;
|
|
|
|
r = cpu_to_le16(res_db);
|
|
|
|
value = min_t(unsigned int, w_length, sizeof(r));
|
|
memcpy(req->buf, &r, value);
|
|
} else {
|
|
dev_err(&audio->gadget->dev,
|
|
"%s:%d control_selector=%d TODO!\n",
|
|
__func__, __LINE__, control_selector);
|
|
}
|
|
} else {
|
|
dev_err(&audio->gadget->dev,
|
|
"%s:%d entity_id=%d control_selector=%d TODO!\n",
|
|
__func__, __LINE__, entity_id, control_selector);
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|
|
static void
|
|
out_rq_cur_complete(struct usb_ep *ep, struct usb_request *req)
|
|
{
|
|
struct g_audio *audio = req->context;
|
|
struct usb_composite_dev *cdev = audio->func.config->cdev;
|
|
struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
|
|
struct f_uac1 *uac1 = func_to_uac1(&audio->func);
|
|
struct usb_ctrlrequest *cr = &uac1->setup_cr;
|
|
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;
|
|
|
|
if (req->status != 0) {
|
|
dev_dbg(&cdev->gadget->dev, "completion err %d\n", req->status);
|
|
return;
|
|
}
|
|
|
|
if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
|
|
(FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
|
|
unsigned int is_playback = 0;
|
|
|
|
if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
|
|
is_playback = 1;
|
|
|
|
if (control_selector == UAC_FU_MUTE) {
|
|
u8 mute = *(u8 *)req->buf;
|
|
|
|
u_audio_set_mute(audio, is_playback, mute);
|
|
|
|
return;
|
|
} else if (control_selector == UAC_FU_VOLUME) {
|
|
__le16 *c = req->buf;
|
|
s16 volume;
|
|
|
|
volume = le16_to_cpu(*c);
|
|
u_audio_set_volume(audio, is_playback, volume);
|
|
|
|
return;
|
|
} else {
|
|
dev_err(&audio->gadget->dev,
|
|
"%s:%d control_selector=%d TODO!\n",
|
|
__func__, __LINE__, control_selector);
|
|
usb_ep_set_halt(ep);
|
|
}
|
|
} else {
|
|
dev_err(&audio->gadget->dev,
|
|
"%s:%d entity_id=%d control_selector=%d TODO!\n",
|
|
__func__, __LINE__, entity_id, control_selector);
|
|
usb_ep_set_halt(ep);
|
|
|
|
}
|
|
}
|
|
|
|
static int
|
|
out_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
|
|
{
|
|
struct usb_request *req = fn->config->cdev->req;
|
|
struct g_audio *audio = func_to_g_audio(fn);
|
|
struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
|
|
struct f_uac1 *uac1 = func_to_uac1(&audio->func);
|
|
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;
|
|
|
|
if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
|
|
(FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
|
|
memcpy(&uac1->setup_cr, cr, sizeof(*cr));
|
|
req->context = audio;
|
|
req->complete = out_rq_cur_complete;
|
|
|
|
return w_length;
|
|
} else {
|
|
dev_err(&audio->gadget->dev,
|
|
"%s:%d entity_id=%d control_selector=%d TODO!\n",
|
|
__func__, __LINE__, entity_id, control_selector);
|
|
}
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int ac_rq_in(struct usb_function *f,
|
|
const struct usb_ctrlrequest *ctrl)
|
|
{
|
|
struct usb_composite_dev *cdev = f->config->cdev;
|
|
int value = -EOPNOTSUPP;
|
|
u8 ep = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF);
|
|
u16 len = le16_to_cpu(ctrl->wLength);
|
|
u16 w_value = le16_to_cpu(ctrl->wValue);
|
|
|
|
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:
|
|
return in_rq_cur(f, ctrl);
|
|
case UAC_GET_MIN:
|
|
return in_rq_min(f, ctrl);
|
|
case UAC_GET_MAX:
|
|
return in_rq_max(f, ctrl);
|
|
case UAC_GET_RES:
|
|
return in_rq_res(f, ctrl);
|
|
case UAC_GET_MEM:
|
|
break;
|
|
case UAC_GET_STAT:
|
|
value = len;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|
|
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_uac1 *uac1 = func_to_uac1(f);
|
|
int value = -EOPNOTSUPP;
|
|
u16 ep = le16_to_cpu(ctrl->wIndex);
|
|
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 f_uac1 *uac1 = func_to_uac1(f);
|
|
u8 *buf = (u8 *)req->buf;
|
|
int value = -EOPNOTSUPP;
|
|
u8 ep = le16_to_cpu(ctrl->wIndex);
|
|
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 (ep == (USB_DIR_IN | 2))
|
|
val = uac1->p_srate;
|
|
else if (ep == (USB_DIR_OUT | 1))
|
|
val = uac1->c_srate;
|
|
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_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;
|
|
case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE:
|
|
if (ctrl->bRequest == UAC_SET_CUR)
|
|
value = out_rq_cur(f, ctrl);
|
|
break;
|
|
case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE:
|
|
value = ac_rq_in(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 g_audio *audio = func_to_g_audio(f);
|
|
struct f_uac1 *uac1 = func_to_uac1(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;
|
|
}
|
|
|
|
/* restart interrupt endpoint */
|
|
if (uac1->int_ep) {
|
|
usb_ep_disable(uac1->int_ep);
|
|
config_ep_by_speed(gadget, &audio->func, uac1->int_ep);
|
|
usb_ep_enable(uac1->int_ep);
|
|
}
|
|
|
|
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_uac1 *uac1 = func_to_uac1(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_uac1 *uac1 = func_to_uac1(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);
|
|
if (uac1->int_ep)
|
|
usb_ep_disable(uac1->int_ep);
|
|
}
|
|
|
|
static void
|
|
f_audio_suspend(struct usb_function *f)
|
|
{
|
|
struct f_uac1 *uac1 = func_to_uac1(f);
|
|
|
|
u_audio_suspend(&uac1->g_audio);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
static struct uac_feature_unit_descriptor *build_fu_desc(int chmask)
|
|
{
|
|
struct uac_feature_unit_descriptor *fu_desc;
|
|
int channels = num_channels(chmask);
|
|
int fu_desc_size = UAC_DT_FEATURE_UNIT_SIZE(channels);
|
|
|
|
fu_desc = kzalloc(fu_desc_size, GFP_KERNEL);
|
|
if (!fu_desc)
|
|
return NULL;
|
|
|
|
fu_desc->bLength = fu_desc_size;
|
|
fu_desc->bDescriptorType = USB_DT_CS_INTERFACE;
|
|
|
|
fu_desc->bDescriptorSubtype = UAC_FEATURE_UNIT;
|
|
fu_desc->bControlSize = 2;
|
|
|
|
/* bUnitID, bSourceID and bmaControls will be defined later */
|
|
|
|
return fu_desc;
|
|
}
|
|
|
|
/* B.3.2 Class-Specific AC Interface Descriptor */
|
|
static struct
|
|
uac1_ac_header_descriptor *build_ac_header_desc(struct f_uac1_opts *opts)
|
|
{
|
|
struct uac1_ac_header_descriptor *ac_desc;
|
|
int ac_header_desc_size;
|
|
int num_ifaces = 0;
|
|
|
|
if (EPOUT_EN(opts))
|
|
num_ifaces++;
|
|
if (EPIN_EN(opts))
|
|
num_ifaces++;
|
|
|
|
ac_header_desc_size = UAC_DT_AC_HEADER_SIZE(num_ifaces);
|
|
|
|
ac_desc = kzalloc(ac_header_desc_size, GFP_KERNEL);
|
|
if (!ac_desc)
|
|
return NULL;
|
|
|
|
ac_desc->bLength = ac_header_desc_size;
|
|
ac_desc->bDescriptorType = USB_DT_CS_INTERFACE;
|
|
ac_desc->bDescriptorSubtype = UAC_HEADER;
|
|
ac_desc->bcdADC = cpu_to_le16(0x0100);
|
|
ac_desc->bInCollection = num_ifaces;
|
|
|
|
/* wTotalLength and baInterfaceNr will be defined later */
|
|
|
|
return ac_desc;
|
|
}
|
|
|
|
/* Use macro to overcome line length limitation */
|
|
#define USBDHDR(p) (struct usb_descriptor_header *)(p)
|
|
|
|
static void setup_descriptor(struct f_uac1_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))
|
|
io_out_ot_desc.bTerminalID = i++;
|
|
if (EPIN_EN(opts))
|
|
usb_in_ot_desc.bTerminalID = i++;
|
|
if (FUOUT_EN(opts))
|
|
out_feature_unit_desc->bUnitID = i++;
|
|
if (FUIN_EN(opts))
|
|
in_feature_unit_desc->bUnitID = i++;
|
|
|
|
if (FUIN_EN(opts)) {
|
|
usb_in_ot_desc.bSourceID = in_feature_unit_desc->bUnitID;
|
|
in_feature_unit_desc->bSourceID = io_in_it_desc.bTerminalID;
|
|
} else {
|
|
usb_in_ot_desc.bSourceID = io_in_it_desc.bTerminalID;
|
|
}
|
|
if (FUOUT_EN(opts)) {
|
|
io_out_ot_desc.bSourceID = out_feature_unit_desc->bUnitID;
|
|
out_feature_unit_desc->bSourceID = usb_out_it_desc.bTerminalID;
|
|
} 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;
|
|
|
|
ac_header_desc->wTotalLength = cpu_to_le16(ac_header_desc->bLength);
|
|
|
|
if (EPIN_EN(opts)) {
|
|
u16 len = le16_to_cpu(ac_header_desc->wTotalLength);
|
|
|
|
len += sizeof(usb_in_ot_desc);
|
|
len += sizeof(io_in_it_desc);
|
|
if (FUIN_EN(opts))
|
|
len += in_feature_unit_desc->bLength;
|
|
ac_header_desc->wTotalLength = cpu_to_le16(len);
|
|
}
|
|
if (EPOUT_EN(opts)) {
|
|
u16 len = le16_to_cpu(ac_header_desc->wTotalLength);
|
|
|
|
len += sizeof(usb_out_it_desc);
|
|
len += sizeof(io_out_ot_desc);
|
|
if (FUOUT_EN(opts))
|
|
len += out_feature_unit_desc->bLength;
|
|
ac_header_desc->wTotalLength = cpu_to_le16(len);
|
|
}
|
|
|
|
i = 0;
|
|
f_audio_desc[i++] = USBDHDR(&ac_interface_desc);
|
|
f_audio_desc[i++] = USBDHDR(ac_header_desc);
|
|
|
|
if (EPOUT_EN(opts)) {
|
|
f_audio_desc[i++] = USBDHDR(&usb_out_it_desc);
|
|
f_audio_desc[i++] = USBDHDR(&io_out_ot_desc);
|
|
if (FUOUT_EN(opts))
|
|
f_audio_desc[i++] = USBDHDR(out_feature_unit_desc);
|
|
}
|
|
|
|
if (EPIN_EN(opts)) {
|
|
f_audio_desc[i++] = USBDHDR(&io_in_it_desc);
|
|
f_audio_desc[i++] = USBDHDR(&usb_in_ot_desc);
|
|
if (FUIN_EN(opts))
|
|
f_audio_desc[i++] = USBDHDR(in_feature_unit_desc);
|
|
}
|
|
|
|
if (FUOUT_EN(opts) || FUIN_EN(opts))
|
|
f_audio_desc[i++] = USBDHDR(&ac_int_ep_desc);
|
|
|
|
if (EPOUT_EN(opts)) {
|
|
f_audio_desc[i++] = USBDHDR(&as_out_interface_alt_0_desc);
|
|
f_audio_desc[i++] = USBDHDR(&as_out_interface_alt_1_desc);
|
|
f_audio_desc[i++] = USBDHDR(&as_out_header_desc);
|
|
f_audio_desc[i++] = USBDHDR(&as_out_type_i_desc);
|
|
f_audio_desc[i++] = USBDHDR(&as_out_ep_desc);
|
|
f_audio_desc[i++] = USBDHDR(&as_iso_out_desc);
|
|
}
|
|
if (EPIN_EN(opts)) {
|
|
f_audio_desc[i++] = USBDHDR(&as_in_interface_alt_0_desc);
|
|
f_audio_desc[i++] = USBDHDR(&as_in_interface_alt_1_desc);
|
|
f_audio_desc[i++] = USBDHDR(&as_in_header_desc);
|
|
f_audio_desc[i++] = USBDHDR(&as_in_type_i_desc);
|
|
f_audio_desc[i++] = USBDHDR(&as_in_ep_desc);
|
|
f_audio_desc[i++] = USBDHDR(&as_iso_in_desc);
|
|
}
|
|
f_audio_desc[i] = NULL;
|
|
}
|
|
|
|
static int f_audio_validate_opts(struct g_audio *audio, struct device *dev)
|
|
{
|
|
struct f_uac1_opts *opts = g_audio_to_uac1_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_srates[0]) {
|
|
dev_err(dev, "Error: incorrect playback sampling rate\n");
|
|
return -EINVAL;
|
|
} else if (!opts->c_srates[0]) {
|
|
dev_err(dev, "Error: incorrect capture sampling rate\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (opts->p_volume_max <= opts->p_volume_min) {
|
|
dev_err(dev, "Error: incorrect playback volume max/min\n");
|
|
return -EINVAL;
|
|
} else if (opts->c_volume_max <= opts->c_volume_min) {
|
|
dev_err(dev, "Error: incorrect capture volume max/min\n");
|
|
return -EINVAL;
|
|
} else if (opts->p_volume_res <= 0) {
|
|
dev_err(dev, "Error: negative/zero playback volume resolution\n");
|
|
return -EINVAL;
|
|
} else if (opts->c_volume_res <= 0) {
|
|
dev_err(dev, "Error: negative/zero capture volume resolution\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if ((opts->p_volume_max - opts->p_volume_min) % opts->p_volume_res) {
|
|
dev_err(dev, "Error: incorrect playback volume resolution\n");
|
|
return -EINVAL;
|
|
} else if ((opts->c_volume_max - opts->c_volume_min) % opts->c_volume_res) {
|
|
dev_err(dev, "Error: incorrect capture volume resolution\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 device *dev = &gadget->dev;
|
|
struct f_uac1 *uac1 = func_to_uac1(f);
|
|
struct g_audio *audio = func_to_g_audio(f);
|
|
struct f_uac1_opts *audio_opts;
|
|
struct usb_ep *ep = NULL;
|
|
struct usb_string *us;
|
|
int ba_iface_id;
|
|
int status;
|
|
int idx, i;
|
|
|
|
status = f_audio_validate_opts(audio, dev);
|
|
if (status)
|
|
return status;
|
|
|
|
audio_opts = container_of(f->fi, struct f_uac1_opts, func_inst);
|
|
|
|
strings_uac1[STR_AC_IF].s = audio_opts->function_name;
|
|
|
|
us = usb_gstrings_attach(cdev, uac1_strings, ARRAY_SIZE(strings_uac1));
|
|
if (IS_ERR(us))
|
|
return PTR_ERR(us);
|
|
|
|
ac_header_desc = build_ac_header_desc(audio_opts);
|
|
if (!ac_header_desc)
|
|
return -ENOMEM;
|
|
|
|
if (FUOUT_EN(audio_opts)) {
|
|
out_feature_unit_desc = build_fu_desc(audio_opts->c_chmask);
|
|
if (!out_feature_unit_desc) {
|
|
status = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
}
|
|
if (FUIN_EN(audio_opts)) {
|
|
in_feature_unit_desc = build_fu_desc(audio_opts->p_chmask);
|
|
if (!in_feature_unit_desc) {
|
|
status = -ENOMEM;
|
|
goto err_free_fu;
|
|
}
|
|
}
|
|
|
|
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_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_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;
|
|
|
|
if (FUOUT_EN(audio_opts)) {
|
|
u8 *i_feature;
|
|
|
|
i_feature = (u8 *)out_feature_unit_desc +
|
|
out_feature_unit_desc->bLength - 1;
|
|
*i_feature = us[STR_FU_OUT].id;
|
|
}
|
|
if (FUIN_EN(audio_opts)) {
|
|
u8 *i_feature;
|
|
|
|
i_feature = (u8 *)in_feature_unit_desc +
|
|
in_feature_unit_desc->bLength - 1;
|
|
*i_feature = us[STR_FU_IN].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;
|
|
|
|
if (FUOUT_EN(audio_opts)) {
|
|
__le16 *bma = (__le16 *)&out_feature_unit_desc->bmaControls[0];
|
|
u32 control = 0;
|
|
|
|
if (audio_opts->c_mute_present)
|
|
control |= UAC_FU_MUTE;
|
|
if (audio_opts->c_volume_present)
|
|
control |= UAC_FU_VOLUME;
|
|
*bma = cpu_to_le16(control);
|
|
}
|
|
if (FUIN_EN(audio_opts)) {
|
|
__le16 *bma = (__le16 *)&in_feature_unit_desc->bmaControls[0];
|
|
u32 control = 0;
|
|
|
|
if (audio_opts->p_mute_present)
|
|
control |= UAC_FU_MUTE;
|
|
if (audio_opts->p_volume_present)
|
|
control |= UAC_FU_VOLUME;
|
|
*bma = cpu_to_le16(control);
|
|
}
|
|
|
|
/* Set sample rates */
|
|
for (i = 0, idx = 0; i < UAC_MAX_RATES; i++) {
|
|
if (audio_opts->c_srates[i] == 0)
|
|
break;
|
|
memcpy(as_out_type_i_desc.tSamFreq[idx++],
|
|
&audio_opts->c_srates[i], 3);
|
|
}
|
|
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_srates[i] == 0)
|
|
break;
|
|
memcpy(as_in_type_i_desc.tSamFreq[idx++],
|
|
&audio_opts->p_srates[i], 3);
|
|
}
|
|
as_in_type_i_desc.bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(idx);
|
|
as_in_type_i_desc.bSamFreqType = idx;
|
|
uac1->p_srate = audio_opts->p_srates[0];
|
|
uac1->c_srate = audio_opts->c_srates[0];
|
|
|
|
/* allocate instance-specific interface IDs, and patch descriptors */
|
|
status = usb_interface_id(c, f);
|
|
if (status < 0)
|
|
goto err_free_fu;
|
|
ac_interface_desc.bInterfaceNumber = status;
|
|
uac1->ac_intf = status;
|
|
uac1->ac_alt = 0;
|
|
|
|
ba_iface_id = 0;
|
|
|
|
if (EPOUT_EN(audio_opts)) {
|
|
status = usb_interface_id(c, f);
|
|
if (status < 0)
|
|
goto err_free_fu;
|
|
as_out_interface_alt_0_desc.bInterfaceNumber = status;
|
|
as_out_interface_alt_1_desc.bInterfaceNumber = status;
|
|
ac_header_desc->baInterfaceNr[ba_iface_id++] = 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 err_free_fu;
|
|
as_in_interface_alt_0_desc.bInterfaceNumber = status;
|
|
as_in_interface_alt_1_desc.bInterfaceNumber = status;
|
|
ac_header_desc->baInterfaceNr[ba_iface_id++] = status;
|
|
uac1->as_in_intf = status;
|
|
uac1->as_in_alt = 0;
|
|
}
|
|
|
|
audio->gadget = gadget;
|
|
|
|
status = -ENODEV;
|
|
|
|
ac_interface_desc.bNumEndpoints = 0;
|
|
|
|
/* allocate AC interrupt endpoint */
|
|
if (FUOUT_EN(audio_opts) || FUIN_EN(audio_opts)) {
|
|
ep = usb_ep_autoconfig(cdev->gadget, &ac_int_ep_desc);
|
|
if (!ep)
|
|
goto err_free_fu;
|
|
uac1->int_ep = ep;
|
|
uac1->int_ep->desc = &ac_int_ep_desc;
|
|
|
|
ac_interface_desc.bNumEndpoints = 1;
|
|
}
|
|
|
|
/* allocate instance-specific endpoints */
|
|
if (EPOUT_EN(audio_opts)) {
|
|
ep = usb_ep_autoconfig(cdev->gadget, &as_out_ep_desc);
|
|
if (!ep)
|
|
goto err_free_fu;
|
|
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 err_free_fu;
|
|
audio->in_ep = ep;
|
|
audio->in_ep->desc = &as_in_ep_desc;
|
|
}
|
|
|
|
setup_descriptor(audio_opts);
|
|
|
|
/* copy descriptors, and track endpoint copies */
|
|
status = usb_assign_descriptors(f, f_audio_desc, f_audio_desc, NULL,
|
|
NULL);
|
|
if (status)
|
|
goto err_free_fu;
|
|
|
|
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->params.c_chmask = audio_opts->c_chmask;
|
|
memcpy(audio->params.c_srates, audio_opts->c_srates,
|
|
sizeof(audio->params.c_srates));
|
|
audio->params.c_ssize = audio_opts->c_ssize;
|
|
if (FUIN_EN(audio_opts)) {
|
|
audio->params.p_fu.id = USB_IN_FU_ID;
|
|
audio->params.p_fu.mute_present = audio_opts->p_mute_present;
|
|
audio->params.p_fu.volume_present =
|
|
audio_opts->p_volume_present;
|
|
audio->params.p_fu.volume_min = audio_opts->p_volume_min;
|
|
audio->params.p_fu.volume_max = audio_opts->p_volume_max;
|
|
audio->params.p_fu.volume_res = audio_opts->p_volume_res;
|
|
}
|
|
audio->params.p_chmask = audio_opts->p_chmask;
|
|
memcpy(audio->params.p_srates, audio_opts->p_srates,
|
|
sizeof(audio->params.p_srates));
|
|
audio->params.p_ssize = audio_opts->p_ssize;
|
|
if (FUOUT_EN(audio_opts)) {
|
|
audio->params.c_fu.id = USB_OUT_FU_ID;
|
|
audio->params.c_fu.mute_present = audio_opts->c_mute_present;
|
|
audio->params.c_fu.volume_present =
|
|
audio_opts->c_volume_present;
|
|
audio->params.c_fu.volume_min = audio_opts->c_volume_min;
|
|
audio->params.c_fu.volume_max = audio_opts->c_volume_max;
|
|
audio->params.c_fu.volume_res = audio_opts->c_volume_res;
|
|
}
|
|
audio->params.req_number = audio_opts->req_number;
|
|
audio->params.fb_max = FBACK_FAST_MAX;
|
|
if (FUOUT_EN(audio_opts) || FUIN_EN(audio_opts))
|
|
audio->notify = audio_notify;
|
|
|
|
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);
|
|
err_free_fu:
|
|
kfree(out_feature_unit_desc);
|
|
out_feature_unit_desc = NULL;
|
|
kfree(in_feature_unit_desc);
|
|
in_feature_unit_desc = NULL;
|
|
fail:
|
|
kfree(ac_header_desc);
|
|
ac_header_desc = NULL;
|
|
return status;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static inline struct f_uac1_opts *to_f_uac1_opts(struct config_item *item)
|
|
{
|
|
return container_of(to_config_group(item), struct f_uac1_opts,
|
|
func_inst.group);
|
|
}
|
|
|
|
static void f_uac1_attr_release(struct config_item *item)
|
|
{
|
|
struct f_uac1_opts *opts = to_f_uac1_opts(item);
|
|
|
|
usb_put_function_instance(&opts->func_inst);
|
|
}
|
|
|
|
static struct configfs_item_operations f_uac1_item_ops = {
|
|
.release = f_uac1_attr_release,
|
|
};
|
|
|
|
#define uac1_kstrtou32 kstrtou32
|
|
#define uac1_kstrtos16 kstrtos16
|
|
#define uac1_kstrtobool(s, base, res) kstrtobool((s), (res))
|
|
|
|
static const char *u32_fmt = "%u\n";
|
|
static const char *s16_fmt = "%hd\n";
|
|
static const char *bool_fmt = "%u\n";
|
|
|
|
#define UAC1_ATTRIBUTE(type, name) \
|
|
static ssize_t f_uac1_opts_##name##_show( \
|
|
struct config_item *item, \
|
|
char *page) \
|
|
{ \
|
|
struct f_uac1_opts *opts = to_f_uac1_opts(item); \
|
|
int result; \
|
|
\
|
|
mutex_lock(&opts->lock); \
|
|
result = sprintf(page, type##_fmt, opts->name); \
|
|
mutex_unlock(&opts->lock); \
|
|
\
|
|
return result; \
|
|
} \
|
|
\
|
|
static ssize_t f_uac1_opts_##name##_store( \
|
|
struct config_item *item, \
|
|
const char *page, size_t len) \
|
|
{ \
|
|
struct f_uac1_opts *opts = to_f_uac1_opts(item); \
|
|
int ret; \
|
|
type num; \
|
|
\
|
|
mutex_lock(&opts->lock); \
|
|
if (opts->refcnt) { \
|
|
ret = -EBUSY; \
|
|
goto end; \
|
|
} \
|
|
\
|
|
ret = uac1_kstrto##type(page, 0, &num); \
|
|
if (ret) \
|
|
goto end; \
|
|
\
|
|
opts->name = num; \
|
|
ret = len; \
|
|
\
|
|
end: \
|
|
mutex_unlock(&opts->lock); \
|
|
return ret; \
|
|
} \
|
|
\
|
|
CONFIGFS_ATTR(f_uac1_opts_, name)
|
|
|
|
#define UAC1_RATE_ATTRIBUTE(name) \
|
|
static ssize_t f_uac1_opts_##name##_show(struct config_item *item, \
|
|
char *page) \
|
|
{ \
|
|
struct f_uac1_opts *opts = to_f_uac1_opts(item); \
|
|
int result = 0; \
|
|
int i; \
|
|
\
|
|
mutex_lock(&opts->lock); \
|
|
page[0] = '\0'; \
|
|
for (i = 0; i < UAC_MAX_RATES; i++) { \
|
|
if (opts->name##s[i] == 0) \
|
|
break; \
|
|
result += sprintf(page + strlen(page), "%u,", \
|
|
opts->name##s[i]); \
|
|
} \
|
|
if (strlen(page) > 0) \
|
|
page[strlen(page) - 1] = '\n'; \
|
|
mutex_unlock(&opts->lock); \
|
|
\
|
|
return result; \
|
|
} \
|
|
\
|
|
static ssize_t f_uac1_opts_##name##_store(struct config_item *item, \
|
|
const char *page, size_t len) \
|
|
{ \
|
|
struct f_uac1_opts *opts = to_f_uac1_opts(item); \
|
|
char *split_page = NULL; \
|
|
int ret = -EINVAL; \
|
|
char *token; \
|
|
u32 num; \
|
|
int i; \
|
|
\
|
|
mutex_lock(&opts->lock); \
|
|
if (opts->refcnt) { \
|
|
ret = -EBUSY; \
|
|
goto end; \
|
|
} \
|
|
\
|
|
i = 0; \
|
|
memset(opts->name##s, 0x00, sizeof(opts->name##s)); \
|
|
split_page = kstrdup(page, GFP_KERNEL); \
|
|
while ((token = strsep(&split_page, ",")) != NULL) { \
|
|
ret = kstrtou32(token, 0, &num); \
|
|
if (ret) \
|
|
goto end; \
|
|
\
|
|
opts->name##s[i++] = num; \
|
|
ret = len; \
|
|
}; \
|
|
\
|
|
end: \
|
|
kfree(split_page); \
|
|
mutex_unlock(&opts->lock); \
|
|
return ret; \
|
|
} \
|
|
\
|
|
CONFIGFS_ATTR(f_uac1_opts_, name)
|
|
|
|
#define UAC1_ATTRIBUTE_STRING(name) \
|
|
static ssize_t f_uac1_opts_##name##_show(struct config_item *item, \
|
|
char *page) \
|
|
{ \
|
|
struct f_uac1_opts *opts = to_f_uac1_opts(item); \
|
|
int result; \
|
|
\
|
|
mutex_lock(&opts->lock); \
|
|
result = snprintf(page, sizeof(opts->name), "%s", opts->name); \
|
|
mutex_unlock(&opts->lock); \
|
|
\
|
|
return result; \
|
|
} \
|
|
\
|
|
static ssize_t f_uac1_opts_##name##_store(struct config_item *item, \
|
|
const char *page, size_t len) \
|
|
{ \
|
|
struct f_uac1_opts *opts = to_f_uac1_opts(item); \
|
|
int ret = 0; \
|
|
\
|
|
mutex_lock(&opts->lock); \
|
|
if (opts->refcnt) { \
|
|
ret = -EBUSY; \
|
|
goto end; \
|
|
} \
|
|
\
|
|
ret = snprintf(opts->name, min(sizeof(opts->name), len), \
|
|
"%s", page); \
|
|
\
|
|
end: \
|
|
mutex_unlock(&opts->lock); \
|
|
return ret; \
|
|
} \
|
|
\
|
|
CONFIGFS_ATTR(f_uac1_opts_, name)
|
|
|
|
UAC1_ATTRIBUTE(u32, c_chmask);
|
|
UAC1_RATE_ATTRIBUTE(c_srate);
|
|
UAC1_ATTRIBUTE(u32, c_ssize);
|
|
UAC1_ATTRIBUTE(u32, p_chmask);
|
|
UAC1_RATE_ATTRIBUTE(p_srate);
|
|
UAC1_ATTRIBUTE(u32, p_ssize);
|
|
UAC1_ATTRIBUTE(u32, req_number);
|
|
|
|
UAC1_ATTRIBUTE(bool, p_mute_present);
|
|
UAC1_ATTRIBUTE(bool, p_volume_present);
|
|
UAC1_ATTRIBUTE(s16, p_volume_min);
|
|
UAC1_ATTRIBUTE(s16, p_volume_max);
|
|
UAC1_ATTRIBUTE(s16, p_volume_res);
|
|
|
|
UAC1_ATTRIBUTE(bool, c_mute_present);
|
|
UAC1_ATTRIBUTE(bool, c_volume_present);
|
|
UAC1_ATTRIBUTE(s16, c_volume_min);
|
|
UAC1_ATTRIBUTE(s16, c_volume_max);
|
|
UAC1_ATTRIBUTE(s16, c_volume_res);
|
|
UAC1_ATTRIBUTE_STRING(function_name);
|
|
|
|
static struct configfs_attribute *f_uac1_attrs[] = {
|
|
&f_uac1_opts_attr_c_chmask,
|
|
&f_uac1_opts_attr_c_srate,
|
|
&f_uac1_opts_attr_c_ssize,
|
|
&f_uac1_opts_attr_p_chmask,
|
|
&f_uac1_opts_attr_p_srate,
|
|
&f_uac1_opts_attr_p_ssize,
|
|
&f_uac1_opts_attr_req_number,
|
|
|
|
&f_uac1_opts_attr_p_mute_present,
|
|
&f_uac1_opts_attr_p_volume_present,
|
|
&f_uac1_opts_attr_p_volume_min,
|
|
&f_uac1_opts_attr_p_volume_max,
|
|
&f_uac1_opts_attr_p_volume_res,
|
|
|
|
&f_uac1_opts_attr_c_mute_present,
|
|
&f_uac1_opts_attr_c_volume_present,
|
|
&f_uac1_opts_attr_c_volume_min,
|
|
&f_uac1_opts_attr_c_volume_max,
|
|
&f_uac1_opts_attr_c_volume_res,
|
|
|
|
&f_uac1_opts_attr_function_name,
|
|
|
|
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_uac1_opts *opts;
|
|
|
|
opts = container_of(f, struct f_uac1_opts, func_inst);
|
|
kfree(opts);
|
|
}
|
|
|
|
static struct usb_function_instance *f_audio_alloc_inst(void)
|
|
{
|
|
struct f_uac1_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 = UAC1_DEF_CCHMASK;
|
|
opts->c_srates[0] = UAC1_DEF_CSRATE;
|
|
opts->c_ssize = UAC1_DEF_CSSIZE;
|
|
opts->p_chmask = UAC1_DEF_PCHMASK;
|
|
opts->p_srates[0] = UAC1_DEF_PSRATE;
|
|
opts->p_ssize = UAC1_DEF_PSSIZE;
|
|
|
|
opts->p_mute_present = UAC1_DEF_MUTE_PRESENT;
|
|
opts->p_volume_present = UAC1_DEF_VOLUME_PRESENT;
|
|
opts->p_volume_min = UAC1_DEF_MIN_DB;
|
|
opts->p_volume_max = UAC1_DEF_MAX_DB;
|
|
opts->p_volume_res = UAC1_DEF_RES_DB;
|
|
|
|
opts->c_mute_present = UAC1_DEF_MUTE_PRESENT;
|
|
opts->c_volume_present = UAC1_DEF_VOLUME_PRESENT;
|
|
opts->c_volume_min = UAC1_DEF_MIN_DB;
|
|
opts->c_volume_max = UAC1_DEF_MAX_DB;
|
|
opts->c_volume_res = UAC1_DEF_RES_DB;
|
|
|
|
opts->req_number = UAC1_DEF_REQ_NUM;
|
|
|
|
snprintf(opts->function_name, sizeof(opts->function_name), "AC Interface");
|
|
|
|
return &opts->func_inst;
|
|
}
|
|
|
|
static void f_audio_free(struct usb_function *f)
|
|
{
|
|
struct g_audio *audio;
|
|
struct f_uac1_opts *opts;
|
|
|
|
audio = func_to_g_audio(f);
|
|
opts = container_of(f->fi, struct f_uac1_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);
|
|
|
|
kfree(out_feature_unit_desc);
|
|
out_feature_unit_desc = NULL;
|
|
kfree(in_feature_unit_desc);
|
|
in_feature_unit_desc = NULL;
|
|
|
|
kfree(ac_header_desc);
|
|
ac_header_desc = NULL;
|
|
|
|
audio->gadget = NULL;
|
|
}
|
|
|
|
static struct usb_function *f_audio_alloc(struct usb_function_instance *fi)
|
|
{
|
|
struct f_uac1 *uac1;
|
|
struct f_uac1_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_uac1_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.suspend = f_audio_suspend;
|
|
uac1->g_audio.func.free_func = f_audio_free;
|
|
|
|
return &uac1->g_audio.func;
|
|
}
|
|
|
|
DECLARE_USB_FUNCTION_INIT(uac1, f_audio_alloc_inst, f_audio_alloc);
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Ruslan Bilovol");
|