254 lines
5.7 KiB
C
254 lines
5.7 KiB
C
/*
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* multi.c -- Multifunction Composite driver
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*
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* Copyright (C) 2008 David Brownell
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* Copyright (C) 2008 Nokia Corporation
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* Copyright (C) 2009 Samsung Electronics
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* Author: Michal Nazarewicz (mina86@mina86.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <common.h>
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#include <usb/gadget-multi.h>
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#include <linux/err.h>
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#include "u_serial.h"
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#define DRIVER_DESC "Multifunction Composite Gadget"
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/***************************** Device Descriptor ****************************/
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#define MULTI_VENDOR_NUM 0x1d6b /* Linux Foundation */
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#define MULTI_PRODUCT_NUM 0x0104 /* Multifunction Composite Gadget */
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static struct usb_device_descriptor device_desc = {
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.bLength = sizeof device_desc,
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.bDescriptorType = USB_DT_DEVICE,
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.bcdUSB = cpu_to_le16(0x0200),
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.bDeviceClass = USB_CLASS_MISC /* 0xEF */,
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.bDeviceSubClass = 2,
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.bDeviceProtocol = 1,
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};
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#define STRING_DESCRIPTION_IDX USB_GADGET_FIRST_AVAIL_IDX
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static struct usb_string strings_dev[] = {
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[USB_GADGET_MANUFACTURER_IDX].s = "",
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[USB_GADGET_PRODUCT_IDX].s = "",
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[USB_GADGET_SERIAL_IDX].s = "",
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[STRING_DESCRIPTION_IDX].s = "Multifunction Composite Gadget",
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{ } /* end of list */
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};
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static struct usb_gadget_strings *dev_strings[] = {
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&(struct usb_gadget_strings){
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.language = 0x0409, /* en-us */
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.strings = strings_dev,
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},
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NULL,
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};
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static struct usb_function_instance *fi_acm;
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static struct usb_function *f_acm;
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static struct usb_function_instance *fi_dfu;
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static struct usb_function *f_dfu;
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static struct usb_function_instance *fi_fastboot;
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static struct usb_function *f_fastboot;
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static struct usb_configuration config = {
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.bConfigurationValue = 1,
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.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
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};
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struct f_multi_opts *gadget_multi_opts;
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static int multi_bind_acm(struct usb_composite_dev *cdev)
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{
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int ret;
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fi_acm = usb_get_function_instance("acm");
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if (IS_ERR(fi_acm)) {
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ret = PTR_ERR(fi_acm);
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fi_acm = NULL;
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return ret;
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}
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f_acm = usb_get_function(fi_acm);
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if (IS_ERR(f_acm)) {
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ret = PTR_ERR(f_acm);
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f_acm = NULL;
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return ret;
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}
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return usb_add_function(&config, f_acm);
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}
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static int multi_bind_dfu(struct usb_composite_dev *cdev)
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{
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int ret;
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struct f_dfu_opts *opts;
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fi_dfu = usb_get_function_instance("dfu");
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if (IS_ERR(fi_dfu)) {
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ret = PTR_ERR(fi_dfu);
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fi_dfu = NULL;
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return ret;
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}
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opts = container_of(fi_dfu, struct f_dfu_opts, func_inst);
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opts->files = gadget_multi_opts->dfu_opts.files;
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f_dfu = usb_get_function(fi_dfu);
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if (IS_ERR(f_dfu)) {
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ret = PTR_ERR(f_dfu);
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f_dfu = NULL;
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return ret;
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}
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return usb_add_function(&config, f_dfu);
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}
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static int multi_bind_fastboot(struct usb_composite_dev *cdev)
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{
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int ret;
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struct f_fastboot_opts *opts;
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fi_fastboot = usb_get_function_instance("fastboot");
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if (IS_ERR(fi_fastboot)) {
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ret = PTR_ERR(fi_fastboot);
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fi_fastboot = NULL;
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return ret;
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}
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opts = container_of(fi_fastboot, struct f_fastboot_opts, func_inst);
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opts->files = gadget_multi_opts->fastboot_opts.files;
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f_fastboot = usb_get_function(fi_fastboot);
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if (IS_ERR(f_fastboot)) {
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ret = PTR_ERR(f_fastboot);
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f_fastboot = NULL;
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return ret;
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}
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return usb_add_function(&config, f_fastboot);
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}
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static int multi_unbind(struct usb_composite_dev *cdev)
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{
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if (gadget_multi_opts->create_acm) {
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usb_put_function(f_acm);
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usb_put_function_instance(fi_acm);
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}
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if (gadget_multi_opts->dfu_opts.files) {
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usb_put_function(f_dfu);
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usb_put_function_instance(fi_dfu);
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}
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if (gadget_multi_opts->fastboot_opts.files) {
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usb_put_function(f_fastboot);
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usb_put_function_instance(fi_fastboot);
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}
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return 0;
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}
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static int multi_bind(struct usb_composite_dev *cdev)
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{
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struct usb_gadget *gadget = cdev->gadget;
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int ret;
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/* allocate string IDs */
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ret = usb_string_ids_tab(cdev, strings_dev);
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if (ret < 0)
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return ret;
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if (gadget->vendor_id && gadget->product_id) {
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device_desc.idVendor = cpu_to_le16(gadget->vendor_id);
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device_desc.idProduct = cpu_to_le16(gadget->product_id);
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} else {
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device_desc.idVendor = cpu_to_le16(MULTI_VENDOR_NUM);
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device_desc.idProduct = cpu_to_le16(MULTI_PRODUCT_NUM);
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}
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strings_dev[USB_GADGET_MANUFACTURER_IDX].s = gadget->manufacturer;
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strings_dev[USB_GADGET_PRODUCT_IDX].s = gadget->productname;
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device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
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config.label = strings_dev[STRING_DESCRIPTION_IDX].s;
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config.iConfiguration = strings_dev[STRING_DESCRIPTION_IDX].id;
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ret = usb_add_config_only(cdev, &config);
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if (ret)
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return ret;
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if (gadget_multi_opts->fastboot_opts.files) {
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printf("%s: creating Fastboot function\n", __func__);
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ret = multi_bind_fastboot(cdev);
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if (ret)
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goto out;
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}
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if (gadget_multi_opts->dfu_opts.files) {
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printf("%s: creating DFU function\n", __func__);
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ret = multi_bind_dfu(cdev);
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if (ret)
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goto out;
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}
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if (gadget_multi_opts->create_acm) {
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printf("%s: creating ACM function\n", __func__);
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ret = multi_bind_acm(cdev);
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if (ret)
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goto out;
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}
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usb_ep_autoconfig_reset(cdev->gadget);
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dev_info(&gadget->dev, DRIVER_DESC "\n");
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return 0;
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out:
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multi_unbind(cdev);
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return ret;
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}
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static struct usb_composite_driver multi_driver = {
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.name = "g_multi",
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.dev = &device_desc,
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.strings = dev_strings,
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.max_speed = USB_SPEED_HIGH,
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.bind = multi_bind,
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.unbind = multi_unbind,
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.needs_serial = 1,
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};
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int usb_multi_register(struct f_multi_opts *opts)
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{
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if (gadget_multi_opts) {
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pr_err("USB multi gadget already registered\n");
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return -EBUSY;
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}
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gadget_multi_opts = opts;
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return usb_composite_probe(&multi_driver);
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}
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void usb_multi_unregister(void)
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{
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if (gadget_multi_opts)
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usb_composite_unregister(&multi_driver);
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gadget_multi_opts = NULL;
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}
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