mirror of
https://github.com/AsahiLinux/u-boot
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usb: gadget: udc: make udc-core compile in u-boot build
Make udc-core compile in u-boot by removing all linux specific stuff and having only the bare minimal udc-core required for usb gadget drivers. Also modified the file header to a format that is generally being used in u-boot. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
This commit is contained in:
Kishon Vijay Abraham I
Marek Vasut
parent
45d9337ec3
commit
103fa06cfe
1 changed files with 26 additions and 309 deletions
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@ -1,33 +1,27 @@
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/**
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* udc.c - Core UDC Framework
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* udc-core.c - Core UDC Framework
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*
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* Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com
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*
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* Copyright (C) 2010 Texas Instruments
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* Author: Felipe Balbi <balbi@ti.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 version 2 of
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* the License as published by the Free Software Foundation.
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* Taken from Linux Kernel v3.19-rc1 (drivers/usb/gadget/udc-core.c) and ported
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* to uboot.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* commit 02e8c96627 : usb: gadget: udc: core: prepend udc_attach_driver with
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* usb_
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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* SPDX-License-Identifier: GPL-2.0
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/list.h>
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#include <linux/err.h>
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#include <linux/dma-mapping.h>
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#include <linux/workqueue.h>
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#include <linux/compat.h>
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#include <malloc.h>
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#include <asm/cache.h>
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#include <asm/dma-mapping.h>
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#include <common.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/gadget.h>
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#include <linux/usb.h>
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/**
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* struct usb_udc - describes one usb device controller
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@ -48,38 +42,18 @@ struct usb_udc {
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static struct class *udc_class;
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static LIST_HEAD(udc_list);
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static DEFINE_MUTEX(udc_lock);
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DEFINE_MUTEX(udc_lock);
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/* ------------------------------------------------------------------------- */
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#ifdef CONFIG_HAS_DMA
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int usb_gadget_map_request(struct usb_gadget *gadget,
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struct usb_request *req, int is_in)
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{
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if (req->length == 0)
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return 0;
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if (req->num_sgs) {
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int mapped;
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mapped = dma_map_sg(&gadget->dev, req->sg, req->num_sgs,
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is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
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if (mapped == 0) {
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dev_err(&gadget->dev, "failed to map SGs\n");
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return -EFAULT;
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}
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req->num_mapped_sgs = mapped;
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} else {
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req->dma = dma_map_single(&gadget->dev, req->buf, req->length,
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is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
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if (dma_mapping_error(&gadget->dev, req->dma)) {
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dev_err(&gadget->dev, "failed to map buffer\n");
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return -EFAULT;
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}
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}
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req->dma = dma_map_single(req->buf, req->length,
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is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
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return 0;
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}
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@ -91,20 +65,11 @@ void usb_gadget_unmap_request(struct usb_gadget *gadget,
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if (req->length == 0)
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return;
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if (req->num_mapped_sgs) {
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dma_unmap_sg(&gadget->dev, req->sg, req->num_mapped_sgs,
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is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
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req->num_mapped_sgs = 0;
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} else {
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dma_unmap_single(&gadget->dev, req->dma, req->length,
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is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
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}
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dma_unmap_single((void *)req->dma, req->length,
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is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
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}
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EXPORT_SYMBOL_GPL(usb_gadget_unmap_request);
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#endif /* CONFIG_HAS_DMA */
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/* ------------------------------------------------------------------------- */
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/**
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@ -117,39 +82,16 @@ EXPORT_SYMBOL_GPL(usb_gadget_unmap_request);
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void usb_gadget_giveback_request(struct usb_ep *ep,
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struct usb_request *req)
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{
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if (likely(req->status == 0))
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usb_led_activity(USB_LED_EVENT_GADGET);
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req->complete(ep, req);
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}
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EXPORT_SYMBOL_GPL(usb_gadget_giveback_request);
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/* ------------------------------------------------------------------------- */
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static void usb_gadget_state_work(struct work_struct *work)
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{
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struct usb_gadget *gadget = work_to_gadget(work);
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struct usb_udc *udc = NULL;
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mutex_lock(&udc_lock);
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list_for_each_entry(udc, &udc_list, list)
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if (udc->gadget == gadget)
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goto found;
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mutex_unlock(&udc_lock);
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return;
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found:
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mutex_unlock(&udc_lock);
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sysfs_notify(&udc->dev.kobj, NULL, "state");
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}
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void usb_gadget_set_state(struct usb_gadget *gadget,
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enum usb_device_state state)
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{
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gadget->state = state;
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schedule_work(&gadget->work);
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}
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EXPORT_SYMBOL_GPL(usb_gadget_set_state);
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@ -219,17 +161,9 @@ static void usb_udc_release(struct device *dev)
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struct usb_udc *udc;
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udc = container_of(dev, struct usb_udc, dev);
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dev_dbg(dev, "releasing '%s'\n", dev_name(dev));
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kfree(udc);
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}
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static const struct attribute_group *usb_udc_attr_groups[];
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static void usb_udc_nop_release(struct device *dev)
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{
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dev_vdbg(dev, "%s\n", __func__);
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}
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/**
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* usb_add_gadget_udc_release - adds a new gadget to the udc class driver list
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* @parent: the parent device to this udc. Usually the controller driver's
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@ -250,59 +184,23 @@ int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget,
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goto err1;
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dev_set_name(&gadget->dev, "gadget");
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INIT_WORK(&gadget->work, usb_gadget_state_work);
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gadget->dev.parent = parent;
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#ifdef CONFIG_HAS_DMA
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dma_set_coherent_mask(&gadget->dev, parent->coherent_dma_mask);
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gadget->dev.dma_parms = parent->dma_parms;
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gadget->dev.dma_mask = parent->dma_mask;
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#endif
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if (release)
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gadget->dev.release = release;
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else
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gadget->dev.release = usb_udc_nop_release;
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ret = device_register(&gadget->dev);
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if (ret)
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goto err2;
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device_initialize(&udc->dev);
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udc->dev.release = usb_udc_release;
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udc->dev.class = udc_class;
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udc->dev.groups = usb_udc_attr_groups;
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udc->dev.parent = parent;
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ret = dev_set_name(&udc->dev, "%s", kobject_name(&parent->kobj));
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if (ret)
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goto err3;
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udc->gadget = gadget;
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mutex_lock(&udc_lock);
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list_add_tail(&udc->list, &udc_list);
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ret = device_add(&udc->dev);
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if (ret)
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goto err4;
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usb_gadget_set_state(gadget, USB_STATE_NOTATTACHED);
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mutex_unlock(&udc_lock);
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return 0;
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err4:
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list_del(&udc->list);
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mutex_unlock(&udc_lock);
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err3:
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put_device(&udc->dev);
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err2:
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put_device(&gadget->dev);
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kfree(udc);
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err1:
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return ret;
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}
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@ -327,16 +225,12 @@ static void usb_gadget_remove_driver(struct usb_udc *udc)
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dev_dbg(&udc->dev, "unregistering UDC driver [%s]\n",
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udc->driver->function);
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kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE);
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usb_gadget_disconnect(udc->gadget);
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udc->driver->disconnect(udc->gadget);
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udc->driver->unbind(udc->gadget);
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usb_gadget_udc_stop(udc);
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udc->driver = NULL;
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udc->dev.driver = NULL;
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udc->gadget->dev.driver = NULL;
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}
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/**
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@ -368,11 +262,6 @@ found:
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if (udc->driver)
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usb_gadget_remove_driver(udc);
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kobject_uevent(&udc->dev.kobj, KOBJ_REMOVE);
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flush_work(&gadget->work);
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device_unregister(&udc->dev);
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device_unregister(&gadget->dev);
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}
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EXPORT_SYMBOL_GPL(usb_del_gadget_udc);
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@ -386,10 +275,8 @@ static int udc_bind_to_driver(struct usb_udc *udc, struct usb_gadget_driver *dri
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driver->function);
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udc->driver = driver;
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udc->dev.driver = &driver->driver;
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udc->gadget->dev.driver = &driver->driver;
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ret = driver->bind(udc->gadget, driver);
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ret = driver->bind(udc->gadget);
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if (ret)
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goto err1;
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ret = usb_gadget_udc_start(udc);
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@ -399,44 +286,15 @@ static int udc_bind_to_driver(struct usb_udc *udc, struct usb_gadget_driver *dri
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}
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usb_gadget_connect(udc->gadget);
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kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE);
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return 0;
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err1:
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if (ret != -EISNAM)
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dev_err(&udc->dev, "failed to start %s: %d\n",
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udc->driver->function, ret);
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udc->driver = NULL;
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udc->dev.driver = NULL;
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udc->gadget->dev.driver = NULL;
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return ret;
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}
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int usb_udc_attach_driver(const char *name, struct usb_gadget_driver *driver)
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{
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struct usb_udc *udc = NULL;
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int ret = -ENODEV;
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mutex_lock(&udc_lock);
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list_for_each_entry(udc, &udc_list, list) {
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ret = strcmp(name, dev_name(&udc->dev));
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if (!ret)
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break;
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}
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if (ret) {
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ret = -ENODEV;
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goto out;
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}
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if (udc->driver) {
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ret = -EBUSY;
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goto out;
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}
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ret = udc_bind_to_driver(udc, driver);
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out:
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mutex_unlock(&udc_lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(usb_udc_attach_driver);
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int usb_gadget_probe_driver(struct usb_gadget_driver *driver)
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{
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struct usb_udc *udc = NULL;
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@ -452,7 +310,7 @@ int usb_gadget_probe_driver(struct usb_gadget_driver *driver)
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goto found;
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}
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pr_debug("couldn't find an available UDC\n");
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printf("couldn't find an available UDC\n");
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mutex_unlock(&udc_lock);
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return -ENODEV;
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found:
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@ -462,6 +320,12 @@ found:
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}
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EXPORT_SYMBOL_GPL(usb_gadget_probe_driver);
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int usb_gadget_register_driver(struct usb_gadget_driver *driver)
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{
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return usb_gadget_probe_driver(driver);
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}
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EXPORT_SYMBOL_GPL(usb_gadget_register_driver);
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int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
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{
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struct usb_udc *udc = NULL;
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@ -485,153 +349,6 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
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}
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EXPORT_SYMBOL_GPL(usb_gadget_unregister_driver);
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/* ------------------------------------------------------------------------- */
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static ssize_t usb_udc_srp_store(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t n)
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{
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struct usb_udc *udc = container_of(dev, struct usb_udc, dev);
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if (sysfs_streq(buf, "1"))
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usb_gadget_wakeup(udc->gadget);
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return n;
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}
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static DEVICE_ATTR(srp, S_IWUSR, NULL, usb_udc_srp_store);
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static ssize_t usb_udc_softconn_store(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t n)
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{
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struct usb_udc *udc = container_of(dev, struct usb_udc, dev);
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|
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if (!udc->driver) {
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dev_err(dev, "soft-connect without a gadget driver\n");
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return -EOPNOTSUPP;
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}
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|
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if (sysfs_streq(buf, "connect")) {
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usb_gadget_udc_start(udc);
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usb_gadget_connect(udc->gadget);
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} else if (sysfs_streq(buf, "disconnect")) {
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usb_gadget_disconnect(udc->gadget);
|
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udc->driver->disconnect(udc->gadget);
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usb_gadget_udc_stop(udc);
|
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} else {
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dev_err(dev, "unsupported command '%s'\n", buf);
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return -EINVAL;
|
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}
|
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|
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return n;
|
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}
|
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static DEVICE_ATTR(soft_connect, S_IWUSR, NULL, usb_udc_softconn_store);
|
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|
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static ssize_t state_show(struct device *dev, struct device_attribute *attr,
|
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char *buf)
|
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{
|
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struct usb_udc *udc = container_of(dev, struct usb_udc, dev);
|
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struct usb_gadget *gadget = udc->gadget;
|
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|
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return sprintf(buf, "%s\n", usb_state_string(gadget->state));
|
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}
|
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static DEVICE_ATTR_RO(state);
|
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|
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#define USB_UDC_SPEED_ATTR(name, param) \
|
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ssize_t name##_show(struct device *dev, \
|
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struct device_attribute *attr, char *buf) \
|
||||
{ \
|
||||
struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \
|
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return snprintf(buf, PAGE_SIZE, "%s\n", \
|
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usb_speed_string(udc->gadget->param)); \
|
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} \
|
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static DEVICE_ATTR_RO(name)
|
||||
|
||||
static USB_UDC_SPEED_ATTR(current_speed, speed);
|
||||
static USB_UDC_SPEED_ATTR(maximum_speed, max_speed);
|
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|
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#define USB_UDC_ATTR(name) \
|
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ssize_t name##_show(struct device *dev, \
|
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struct device_attribute *attr, char *buf) \
|
||||
{ \
|
||||
struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \
|
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struct usb_gadget *gadget = udc->gadget; \
|
||||
\
|
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return snprintf(buf, PAGE_SIZE, "%d\n", gadget->name); \
|
||||
} \
|
||||
static DEVICE_ATTR_RO(name)
|
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|
||||
static USB_UDC_ATTR(is_otg);
|
||||
static USB_UDC_ATTR(is_a_peripheral);
|
||||
static USB_UDC_ATTR(b_hnp_enable);
|
||||
static USB_UDC_ATTR(a_hnp_support);
|
||||
static USB_UDC_ATTR(a_alt_hnp_support);
|
||||
|
||||
static struct attribute *usb_udc_attrs[] = {
|
||||
&dev_attr_srp.attr,
|
||||
&dev_attr_soft_connect.attr,
|
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&dev_attr_state.attr,
|
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&dev_attr_current_speed.attr,
|
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&dev_attr_maximum_speed.attr,
|
||||
|
||||
&dev_attr_is_otg.attr,
|
||||
&dev_attr_is_a_peripheral.attr,
|
||||
&dev_attr_b_hnp_enable.attr,
|
||||
&dev_attr_a_hnp_support.attr,
|
||||
&dev_attr_a_alt_hnp_support.attr,
|
||||
NULL,
|
||||
};
|
||||
|
||||
static const struct attribute_group usb_udc_attr_group = {
|
||||
.attrs = usb_udc_attrs,
|
||||
};
|
||||
|
||||
static const struct attribute_group *usb_udc_attr_groups[] = {
|
||||
&usb_udc_attr_group,
|
||||
NULL,
|
||||
};
|
||||
|
||||
static int usb_udc_uevent(struct device *dev, struct kobj_uevent_env *env)
|
||||
{
|
||||
struct usb_udc *udc = container_of(dev, struct usb_udc, dev);
|
||||
int ret;
|
||||
|
||||
ret = add_uevent_var(env, "USB_UDC_NAME=%s", udc->gadget->name);
|
||||
if (ret) {
|
||||
dev_err(dev, "failed to add uevent USB_UDC_NAME\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
if (udc->driver) {
|
||||
ret = add_uevent_var(env, "USB_UDC_DRIVER=%s",
|
||||
udc->driver->function);
|
||||
if (ret) {
|
||||
dev_err(dev, "failed to add uevent USB_UDC_DRIVER\n");
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __init usb_udc_init(void)
|
||||
{
|
||||
udc_class = class_create(THIS_MODULE, "udc");
|
||||
if (IS_ERR(udc_class)) {
|
||||
pr_err("failed to create udc class --> %ld\n",
|
||||
PTR_ERR(udc_class));
|
||||
return PTR_ERR(udc_class);
|
||||
}
|
||||
|
||||
udc_class->dev_uevent = usb_udc_uevent;
|
||||
return 0;
|
||||
}
|
||||
subsys_initcall(usb_udc_init);
|
||||
|
||||
static void __exit usb_udc_exit(void)
|
||||
{
|
||||
class_destroy(udc_class);
|
||||
}
|
||||
module_exit(usb_udc_exit);
|
||||
|
||||
MODULE_DESCRIPTION("UDC Framework");
|
||||
MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
|
|
|
|||
Loading…
Reference in a new issue