12ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi/** 22ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * udc.c - Core UDC Framework 32ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * 42ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * Copyright (C) 2010 Texas Instruments 52ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * Author: Felipe Balbi <balbi@ti.com> 62ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * 72ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * This program is free software: you can redistribute it and/or modify 82ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * it under the terms of the GNU General Public License version 2 of 92ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * the License as published by the Free Software Foundation. 102ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * 112ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * This program is distributed in the hope that it will be useful, 122ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * but WITHOUT ANY WARRANTY; without even the implied warranty of 132ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 142ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * GNU General Public License for more details. 152ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * 162ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * You should have received a copy of the GNU General Public License 172ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * along with this program. If not, see <http://www.gnu.org/licenses/>. 182ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi */ 192ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 202ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi#include <linux/kernel.h> 212ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi#include <linux/module.h> 222ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi#include <linux/device.h> 232ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi#include <linux/list.h> 242ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi#include <linux/err.h> 25a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi#include <linux/dma-mapping.h> 265702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15Felipe Balbi#include <linux/workqueue.h> 272ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 282ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi#include <linux/usb/ch9.h> 292ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi#include <linux/usb/gadget.h> 300cfbd328d60f85b0dcf66df61a3615e9a8e5d4e4Michal Sojka#include <linux/usb.h> 312ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 322ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi/** 332ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * struct usb_udc - describes one usb device controller 342ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * @driver - the gadget driver pointer. For use by the class code 352ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * @dev - the child device to the actual controller 362ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * @gadget - the gadget. For use by the class code 372ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * @list - for use by the udc class driver 382ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * 392ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * This represents the internal data structure which is used by the UDC-class 402ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * to hold information about udc driver and gadget together. 412ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi */ 422ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistruct usb_udc { 432ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi struct usb_gadget_driver *driver; 442ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi struct usb_gadget *gadget; 452ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi struct device dev; 462ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi struct list_head list; 472ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi}; 482ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 492ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic struct class *udc_class; 502ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic LIST_HEAD(udc_list); 512ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic DEFINE_MUTEX(udc_lock); 522ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 532ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi/* ------------------------------------------------------------------------- */ 542ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 55908b961326b2ecfbf494c9b2f206847d925f269dAlan Stern#ifdef CONFIG_HAS_DMA 56908b961326b2ecfbf494c9b2f206847d925f269dAlan Stern 57a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbiint usb_gadget_map_request(struct usb_gadget *gadget, 58a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi struct usb_request *req, int is_in) 59a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi{ 60a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi if (req->length == 0) 61a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi return 0; 62a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi 63a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi if (req->num_sgs) { 64a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi int mapped; 65a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi 66a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi mapped = dma_map_sg(&gadget->dev, req->sg, req->num_sgs, 67a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 68a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi if (mapped == 0) { 69a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi dev_err(&gadget->dev, "failed to map SGs\n"); 70a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi return -EFAULT; 71a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi } 72a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi 73a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi req->num_mapped_sgs = mapped; 74a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi } else { 75a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi req->dma = dma_map_single(&gadget->dev, req->buf, req->length, 76a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 77a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi 78a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi if (dma_mapping_error(&gadget->dev, req->dma)) { 79a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi dev_err(&gadget->dev, "failed to map buffer\n"); 80a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi return -EFAULT; 81a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi } 82a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi } 83a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi 84a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi return 0; 85a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi} 86a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe BalbiEXPORT_SYMBOL_GPL(usb_gadget_map_request); 87a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi 88a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbivoid usb_gadget_unmap_request(struct usb_gadget *gadget, 89a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi struct usb_request *req, int is_in) 90a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi{ 91a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi if (req->length == 0) 92a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi return; 93a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi 94a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi if (req->num_mapped_sgs) { 95a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi dma_unmap_sg(&gadget->dev, req->sg, req->num_mapped_sgs, 96a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 97a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi 98a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi req->num_mapped_sgs = 0; 99a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi } else { 100a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi dma_unmap_single(&gadget->dev, req->dma, req->length, 101a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 102a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi } 103a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi} 104a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe BalbiEXPORT_SYMBOL_GPL(usb_gadget_unmap_request); 105a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi 106908b961326b2ecfbf494c9b2f206847d925f269dAlan Stern#endif /* CONFIG_HAS_DMA */ 107908b961326b2ecfbf494c9b2f206847d925f269dAlan Stern 108a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi/* ------------------------------------------------------------------------- */ 109a698908d3b3be915ac20cd37faeff1216f6b4fe8Felipe Balbi 1103fc2aa5522ab958374d93ef5d2e12df7ee233c91Michal Sojka/** 1113fc2aa5522ab958374d93ef5d2e12df7ee233c91Michal Sojka * usb_gadget_giveback_request - give the request back to the gadget layer 1123fc2aa5522ab958374d93ef5d2e12df7ee233c91Michal Sojka * Context: in_interrupt() 1133fc2aa5522ab958374d93ef5d2e12df7ee233c91Michal Sojka * 1143fc2aa5522ab958374d93ef5d2e12df7ee233c91Michal Sojka * This is called by device controller drivers in order to return the 1153fc2aa5522ab958374d93ef5d2e12df7ee233c91Michal Sojka * completed request back to the gadget layer. 1163fc2aa5522ab958374d93ef5d2e12df7ee233c91Michal Sojka */ 1173fc2aa5522ab958374d93ef5d2e12df7ee233c91Michal Sojkavoid usb_gadget_giveback_request(struct usb_ep *ep, 1183fc2aa5522ab958374d93ef5d2e12df7ee233c91Michal Sojka struct usb_request *req) 1193fc2aa5522ab958374d93ef5d2e12df7ee233c91Michal Sojka{ 1200cfbd328d60f85b0dcf66df61a3615e9a8e5d4e4Michal Sojka if (likely(req->status == 0)) 1210cfbd328d60f85b0dcf66df61a3615e9a8e5d4e4Michal Sojka usb_led_activity(USB_LED_EVENT_GADGET); 1220cfbd328d60f85b0dcf66df61a3615e9a8e5d4e4Michal Sojka 1233fc2aa5522ab958374d93ef5d2e12df7ee233c91Michal Sojka req->complete(ep, req); 1243fc2aa5522ab958374d93ef5d2e12df7ee233c91Michal Sojka} 1253fc2aa5522ab958374d93ef5d2e12df7ee233c91Michal SojkaEXPORT_SYMBOL_GPL(usb_gadget_giveback_request); 1263fc2aa5522ab958374d93ef5d2e12df7ee233c91Michal Sojka 1273fc2aa5522ab958374d93ef5d2e12df7ee233c91Michal Sojka/* ------------------------------------------------------------------------- */ 1283fc2aa5522ab958374d93ef5d2e12df7ee233c91Michal Sojka 1295702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15Felipe Balbistatic void usb_gadget_state_work(struct work_struct *work) 1305702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15Felipe Balbi{ 1315702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15Felipe Balbi struct usb_gadget *gadget = work_to_gadget(work); 132af54954ad02091506ced45588215d389d606f74eAndreas Larsson struct usb_udc *udc = NULL; 1335702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15Felipe Balbi 134af54954ad02091506ced45588215d389d606f74eAndreas Larsson mutex_lock(&udc_lock); 135af54954ad02091506ced45588215d389d606f74eAndreas Larsson list_for_each_entry(udc, &udc_list, list) 136af54954ad02091506ced45588215d389d606f74eAndreas Larsson if (udc->gadget == gadget) 137af54954ad02091506ced45588215d389d606f74eAndreas Larsson goto found; 138af54954ad02091506ced45588215d389d606f74eAndreas Larsson mutex_unlock(&udc_lock); 139af54954ad02091506ced45588215d389d606f74eAndreas Larsson 140af54954ad02091506ced45588215d389d606f74eAndreas Larsson return; 141af54954ad02091506ced45588215d389d606f74eAndreas Larsson 142af54954ad02091506ced45588215d389d606f74eAndreas Larssonfound: 143af54954ad02091506ced45588215d389d606f74eAndreas Larsson mutex_unlock(&udc_lock); 144af54954ad02091506ced45588215d389d606f74eAndreas Larsson 145af54954ad02091506ced45588215d389d606f74eAndreas Larsson sysfs_notify(&udc->dev.kobj, NULL, "state"); 1465702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15Felipe Balbi} 1475702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15Felipe Balbi 14849401f4169c0e5a1b38f1a676d6f12eecaf77485Felipe Balbivoid usb_gadget_set_state(struct usb_gadget *gadget, 14949401f4169c0e5a1b38f1a676d6f12eecaf77485Felipe Balbi enum usb_device_state state) 15049401f4169c0e5a1b38f1a676d6f12eecaf77485Felipe Balbi{ 15149401f4169c0e5a1b38f1a676d6f12eecaf77485Felipe Balbi gadget->state = state; 1525702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15Felipe Balbi schedule_work(&gadget->work); 15349401f4169c0e5a1b38f1a676d6f12eecaf77485Felipe Balbi} 15449401f4169c0e5a1b38f1a676d6f12eecaf77485Felipe BalbiEXPORT_SYMBOL_GPL(usb_gadget_set_state); 15549401f4169c0e5a1b38f1a676d6f12eecaf77485Felipe Balbi 15649401f4169c0e5a1b38f1a676d6f12eecaf77485Felipe Balbi/* ------------------------------------------------------------------------- */ 15749401f4169c0e5a1b38f1a676d6f12eecaf77485Felipe Balbi 1582ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi/** 159974a70bdecea5296db1b643e4046ef208e99c592Peter Chen * usb_gadget_udc_reset - notifies the udc core that bus reset occurs 160974a70bdecea5296db1b643e4046ef208e99c592Peter Chen * @gadget: The gadget which bus reset occurs 161974a70bdecea5296db1b643e4046ef208e99c592Peter Chen * @driver: The gadget driver we want to notify 162974a70bdecea5296db1b643e4046ef208e99c592Peter Chen * 163974a70bdecea5296db1b643e4046ef208e99c592Peter Chen * If the udc driver has bus reset handler, it needs to call this when the bus 164974a70bdecea5296db1b643e4046ef208e99c592Peter Chen * reset occurs, it notifies the gadget driver that the bus reset occurs as 165974a70bdecea5296db1b643e4046ef208e99c592Peter Chen * well as updates gadget state. 166974a70bdecea5296db1b643e4046ef208e99c592Peter Chen */ 167974a70bdecea5296db1b643e4046ef208e99c592Peter Chenvoid usb_gadget_udc_reset(struct usb_gadget *gadget, 168974a70bdecea5296db1b643e4046ef208e99c592Peter Chen struct usb_gadget_driver *driver) 169974a70bdecea5296db1b643e4046ef208e99c592Peter Chen{ 170974a70bdecea5296db1b643e4046ef208e99c592Peter Chen driver->reset(gadget); 171974a70bdecea5296db1b643e4046ef208e99c592Peter Chen usb_gadget_set_state(gadget, USB_STATE_DEFAULT); 172974a70bdecea5296db1b643e4046ef208e99c592Peter Chen} 173974a70bdecea5296db1b643e4046ef208e99c592Peter ChenEXPORT_SYMBOL_GPL(usb_gadget_udc_reset); 174974a70bdecea5296db1b643e4046ef208e99c592Peter Chen 175974a70bdecea5296db1b643e4046ef208e99c592Peter Chen/** 176352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * usb_gadget_udc_start - tells usb device controller to start up 177352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * @gadget: The gadget we want to get started 178352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * @driver: The driver we want to bind to @gadget 179352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * 180352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * This call is issued by the UDC Class driver when it's about 181352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * to register a gadget driver to the device controller, before 182352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * calling gadget driver's bind() method. 183352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * 184352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * It allows the controller to be powered off until strictly 185352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * necessary to have it powered on. 186352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * 187352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * Returns zero on success, else negative errno. 188352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior */ 189352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewiorstatic inline int usb_gadget_udc_start(struct usb_gadget *gadget, 190352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior struct usb_gadget_driver *driver) 191352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior{ 192352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior return gadget->ops->udc_start(gadget, driver); 193352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior} 194352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior 195352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior/** 196352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * usb_gadget_udc_stop - tells usb device controller we don't need it anymore 197352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * @gadget: The device we want to stop activity 198352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * @driver: The driver to unbind from @gadget 199352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * 200352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * This call is issued by the UDC Class driver after calling 201352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * gadget driver's unbind() method. 202352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * 203352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * The details are implementation specific, but it can go as 204352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * far as powering off UDC completely and disable its data 205352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior * line pullups. 206352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior */ 207352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewiorstatic inline void usb_gadget_udc_stop(struct usb_gadget *gadget, 208352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior struct usb_gadget_driver *driver) 209352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior{ 210352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior gadget->ops->udc_stop(gadget, driver); 211352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior} 212352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior 213352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior/** 2142ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * usb_udc_release - release the usb_udc struct 2152ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * @dev: the dev member within usb_udc 2162ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * 2172ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * This is called by driver's core in order to free memory once the last 2182ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * reference is released. 2192ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi */ 2202ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic void usb_udc_release(struct device *dev) 2212ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi{ 2222ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi struct usb_udc *udc; 2232ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 2242ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi udc = container_of(dev, struct usb_udc, dev); 2252ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi dev_dbg(dev, "releasing '%s'\n", dev_name(dev)); 2262ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi kfree(udc); 2272ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi} 2282ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 229019f976e8f268a63b2fcbb662aa2f77f6b07bac6Sebastian Andrzej Siewiorstatic const struct attribute_group *usb_udc_attr_groups[]; 230792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi 231792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbistatic void usb_udc_nop_release(struct device *dev) 232792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi{ 233792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi dev_vdbg(dev, "%s\n", __func__); 234792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi} 235792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi 2362ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi/** 237792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi * usb_add_gadget_udc_release - adds a new gadget to the udc class driver list 238792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi * @parent: the parent device to this udc. Usually the controller driver's 239792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi * device. 240792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi * @gadget: the gadget to be added to the list. 241792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi * @release: a gadget release function. 2422ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * 2432ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * Returns zero on success, negative errno otherwise. 2442ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi */ 245792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbiint usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget, 246792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi void (*release)(struct device *dev)) 2472ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi{ 2482ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi struct usb_udc *udc; 2492ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi int ret = -ENOMEM; 2502ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 2512ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi udc = kzalloc(sizeof(*udc), GFP_KERNEL); 2522ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi if (!udc) 2532ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi goto err1; 2542ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 2557bce401cc6db5508ef2517e45bd8caf7ce0a15eeFelipe Balbi dev_set_name(&gadget->dev, "gadget"); 2565702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15Felipe Balbi INIT_WORK(&gadget->work, usb_gadget_state_work); 2572ed14320f3fed9e5b774ef68bdf73a4f3e28844eFelipe Balbi gadget->dev.parent = parent; 258f07bd56bbdaa2340ebf46af9a37e7b2d1b4578e3Felipe Balbi 259908b961326b2ecfbf494c9b2f206847d925f269dAlan Stern#ifdef CONFIG_HAS_DMA 260658c8cf14dce1093e9f810f7e04a711ed79da6bdFelipe Balbi dma_set_coherent_mask(&gadget->dev, parent->coherent_dma_mask); 261658c8cf14dce1093e9f810f7e04a711ed79da6bdFelipe Balbi gadget->dev.dma_parms = parent->dma_parms; 262658c8cf14dce1093e9f810f7e04a711ed79da6bdFelipe Balbi gadget->dev.dma_mask = parent->dma_mask; 263908b961326b2ecfbf494c9b2f206847d925f269dAlan Stern#endif 264658c8cf14dce1093e9f810f7e04a711ed79da6bdFelipe Balbi 265ddf47ccbfebc12add813cf729ecfc2d5ab59ca19Felipe Balbi if (release) 266792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi gadget->dev.release = release; 267ddf47ccbfebc12add813cf729ecfc2d5ab59ca19Felipe Balbi else 268ddf47ccbfebc12add813cf729ecfc2d5ab59ca19Felipe Balbi gadget->dev.release = usb_udc_nop_release; 269792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi 2707bce401cc6db5508ef2517e45bd8caf7ce0a15eeFelipe Balbi ret = device_register(&gadget->dev); 2717bce401cc6db5508ef2517e45bd8caf7ce0a15eeFelipe Balbi if (ret) 2727bce401cc6db5508ef2517e45bd8caf7ce0a15eeFelipe Balbi goto err2; 273f07bd56bbdaa2340ebf46af9a37e7b2d1b4578e3Felipe Balbi 2742ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi device_initialize(&udc->dev); 2752ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi udc->dev.release = usb_udc_release; 2762ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi udc->dev.class = udc_class; 277019f976e8f268a63b2fcbb662aa2f77f6b07bac6Sebastian Andrzej Siewior udc->dev.groups = usb_udc_attr_groups; 2782ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi udc->dev.parent = parent; 2792ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi ret = dev_set_name(&udc->dev, "%s", kobject_name(&parent->kobj)); 2802ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi if (ret) 281f07bd56bbdaa2340ebf46af9a37e7b2d1b4578e3Felipe Balbi goto err3; 2822ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 2832ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi udc->gadget = gadget; 2842ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 2852ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi mutex_lock(&udc_lock); 2862ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi list_add_tail(&udc->list, &udc_list); 2872ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 2882ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi ret = device_add(&udc->dev); 2892ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi if (ret) 290f07bd56bbdaa2340ebf46af9a37e7b2d1b4578e3Felipe Balbi goto err4; 2912ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 29249401f4169c0e5a1b38f1a676d6f12eecaf77485Felipe Balbi usb_gadget_set_state(gadget, USB_STATE_NOTATTACHED); 2932ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 2942ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi mutex_unlock(&udc_lock); 2952ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 2962ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi return 0; 297f07bd56bbdaa2340ebf46af9a37e7b2d1b4578e3Felipe Balbi 298f07bd56bbdaa2340ebf46af9a37e7b2d1b4578e3Felipe Balbierr4: 2992ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi list_del(&udc->list); 3002ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi mutex_unlock(&udc_lock); 3012ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 302f07bd56bbdaa2340ebf46af9a37e7b2d1b4578e3Felipe Balbierr3: 3032ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi put_device(&udc->dev); 3042ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 305f07bd56bbdaa2340ebf46af9a37e7b2d1b4578e3Felipe Balbierr2: 3067bce401cc6db5508ef2517e45bd8caf7ce0a15eeFelipe Balbi put_device(&gadget->dev); 307c5dbc220b327dc1ff5e0b1d829c091347511ed83Felipe Balbi kfree(udc); 3087bce401cc6db5508ef2517e45bd8caf7ce0a15eeFelipe Balbi 3092ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbierr1: 3102ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi return ret; 3112ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi} 312792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe BalbiEXPORT_SYMBOL_GPL(usb_add_gadget_udc_release); 313792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi 314792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi/** 315792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi * usb_add_gadget_udc - adds a new gadget to the udc class driver list 316792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi * @parent: the parent device to this udc. Usually the controller 317792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi * driver's device. 318792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi * @gadget: the gadget to be added to the list 319792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi * 320792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi * Returns zero on success, negative errno otherwise. 321792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi */ 322792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbiint usb_add_gadget_udc(struct device *parent, struct usb_gadget *gadget) 323792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi{ 324792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi return usb_add_gadget_udc_release(parent, gadget, NULL); 325792bfcf7a1cd7913fa5d55f2b3a40e3275e98f6fFelipe Balbi} 3262ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe BalbiEXPORT_SYMBOL_GPL(usb_add_gadget_udc); 3272ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 3282ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic void usb_gadget_remove_driver(struct usb_udc *udc) 3292ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi{ 3302ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi dev_dbg(&udc->dev, "unregistering UDC driver [%s]\n", 3312ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi udc->gadget->name); 3322ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 3332ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE); 3342ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 3352d7ebbb0946e9e13285eee348df1dbc48f0580e0Felipe Balbi usb_gadget_disconnect(udc->gadget); 3362d7ebbb0946e9e13285eee348df1dbc48f0580e0Felipe Balbi udc->driver->disconnect(udc->gadget); 3372d7ebbb0946e9e13285eee348df1dbc48f0580e0Felipe Balbi udc->driver->unbind(udc->gadget); 338511f3c5326eabe1ece35202a404c24c0aeacc246Alan Stern usb_gadget_udc_stop(udc->gadget, NULL); 3392ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 3402ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi udc->driver = NULL; 3412ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi udc->dev.driver = NULL; 34270d3a49878cb3fc0e5ec0bd1e607c7ac63743f67Felipe Balbi udc->gadget->dev.driver = NULL; 3432ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi} 3442ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 3452ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi/** 3462ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * usb_del_gadget_udc - deletes @udc from udc_list 3472ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * @gadget: the gadget to be removed. 3482ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * 3492ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * This, will call usb_gadget_unregister_driver() if 3502ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi * the @udc is still busy. 3512ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi */ 3522ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbivoid usb_del_gadget_udc(struct usb_gadget *gadget) 3532ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi{ 3542ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi struct usb_udc *udc = NULL; 3552ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 3562ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi mutex_lock(&udc_lock); 3572ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi list_for_each_entry(udc, &udc_list, list) 3582ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi if (udc->gadget == gadget) 3592ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi goto found; 3602ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 3612ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi dev_err(gadget->dev.parent, "gadget not registered.\n"); 3622ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi mutex_unlock(&udc_lock); 3632ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 3642ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi return; 3652ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 3662ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbifound: 3672ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi dev_vdbg(gadget->dev.parent, "unregistering gadget\n"); 3682ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 3692ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi list_del(&udc->list); 3702ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi mutex_unlock(&udc_lock); 3712ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 3722ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi if (udc->driver) 3732ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi usb_gadget_remove_driver(udc); 3742ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 3752ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi kobject_uevent(&udc->dev.kobj, KOBJ_REMOVE); 3765702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15Felipe Balbi flush_work(&gadget->work); 3772ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi device_unregister(&udc->dev); 3787bce401cc6db5508ef2517e45bd8caf7ce0a15eeFelipe Balbi device_unregister(&gadget->dev); 3792ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi} 3802ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe BalbiEXPORT_SYMBOL_GPL(usb_del_gadget_udc); 3812ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 3822ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi/* ------------------------------------------------------------------------- */ 3832ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 3844c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewiorstatic int udc_bind_to_driver(struct usb_udc *udc, struct usb_gadget_driver *driver) 3852ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi{ 3864c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior int ret; 3872ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 3882ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi dev_dbg(&udc->dev, "registering UDC driver [%s]\n", 3892ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi driver->function); 3902ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 3912ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi udc->driver = driver; 3922ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi udc->dev.driver = &driver->driver; 39370d3a49878cb3fc0e5ec0bd1e607c7ac63743f67Felipe Balbi udc->gadget->dev.driver = &driver->driver; 3942ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 3952d7ebbb0946e9e13285eee348df1dbc48f0580e0Felipe Balbi ret = driver->bind(udc->gadget, driver); 3962d7ebbb0946e9e13285eee348df1dbc48f0580e0Felipe Balbi if (ret) 3972d7ebbb0946e9e13285eee348df1dbc48f0580e0Felipe Balbi goto err1; 3982d7ebbb0946e9e13285eee348df1dbc48f0580e0Felipe Balbi ret = usb_gadget_udc_start(udc->gadget, driver); 3992d7ebbb0946e9e13285eee348df1dbc48f0580e0Felipe Balbi if (ret) { 4002d7ebbb0946e9e13285eee348df1dbc48f0580e0Felipe Balbi driver->unbind(udc->gadget); 4012d7ebbb0946e9e13285eee348df1dbc48f0580e0Felipe Balbi goto err1; 402352c2dc8b07491bbab77ddf86c20c16a97326ee7Sebastian Andrzej Siewior } 403e8205bb08bb7390609ef08cae49455954d7d93f1Amit Pundir usb_gadget_connect(udc->gadget); 4042ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 4052ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE); 4062ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi return 0; 4072ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbierr1: 408f8cffc84a2ff8efc2ecca6128485877109e499f5Fabio Estevam if (ret != -EISNAM) 409f8cffc84a2ff8efc2ecca6128485877109e499f5Fabio Estevam dev_err(&udc->dev, "failed to start %s: %d\n", 4102ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi udc->driver->function, ret); 4112ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi udc->driver = NULL; 4122ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi udc->dev.driver = NULL; 41370d3a49878cb3fc0e5ec0bd1e607c7ac63743f67Felipe Balbi udc->gadget->dev.driver = NULL; 4144c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior return ret; 4154c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior} 4164c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior 4174c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewiorint udc_attach_driver(const char *name, struct usb_gadget_driver *driver) 4184c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior{ 4194c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior struct usb_udc *udc = NULL; 4204c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior int ret = -ENODEV; 4214c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior 4224c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior mutex_lock(&udc_lock); 4234c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior list_for_each_entry(udc, &udc_list, list) { 4244c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior ret = strcmp(name, dev_name(&udc->dev)); 4254c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior if (!ret) 4264c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior break; 4274c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior } 4284c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior if (ret) { 4294c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior ret = -ENODEV; 4304c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior goto out; 4314c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior } 4324c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior if (udc->driver) { 4334c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior ret = -EBUSY; 4344c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior goto out; 4354c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior } 4364c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior ret = udc_bind_to_driver(udc, driver); 4374c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewiorout: 4384c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior mutex_unlock(&udc_lock); 4394c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior return ret; 4404c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior} 4414c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej SiewiorEXPORT_SYMBOL_GPL(udc_attach_driver); 4424c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior 4434c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewiorint usb_gadget_probe_driver(struct usb_gadget_driver *driver) 4444c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior{ 4454c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior struct usb_udc *udc = NULL; 4464c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior int ret; 4474c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior 4484c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior if (!driver || !driver->bind || !driver->setup) 4494c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior return -EINVAL; 4504c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior 4514c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior mutex_lock(&udc_lock); 4524c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior list_for_each_entry(udc, &udc_list, list) { 4534c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior /* For now we take the first one */ 4544c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior if (!udc->driver) 4554c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior goto found; 4564c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior } 4574c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior 4584c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior pr_debug("couldn't find an available UDC\n"); 4594c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior mutex_unlock(&udc_lock); 4604c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior return -ENODEV; 4614c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewiorfound: 4624c49a5f0ef1bc61395329ea7a9fce2893e97eaa6Sebastian Andrzej Siewior ret = udc_bind_to_driver(udc, driver); 4632ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi mutex_unlock(&udc_lock); 4642ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi return ret; 4652ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi} 4662ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe BalbiEXPORT_SYMBOL_GPL(usb_gadget_probe_driver); 4672ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 4682ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbiint usb_gadget_unregister_driver(struct usb_gadget_driver *driver) 4692ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi{ 4702ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi struct usb_udc *udc = NULL; 4712ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi int ret = -ENODEV; 4722ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 4732ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi if (!driver || !driver->unbind) 4742ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi return -EINVAL; 4752ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 4762ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi mutex_lock(&udc_lock); 4772ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi list_for_each_entry(udc, &udc_list, list) 4782ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi if (udc->driver == driver) { 4792ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi usb_gadget_remove_driver(udc); 480b5fb8d0a40eb52039e8df6fadafa95ecdcdc3026Peter Chen usb_gadget_set_state(udc->gadget, 481b5fb8d0a40eb52039e8df6fadafa95ecdcdc3026Peter Chen USB_STATE_NOTATTACHED); 4822ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi ret = 0; 4832ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi break; 4842ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi } 4852ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 4862ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi mutex_unlock(&udc_lock); 4872ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi return ret; 4882ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi} 4892ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe BalbiEXPORT_SYMBOL_GPL(usb_gadget_unregister_driver); 4902ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 4912ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi/* ------------------------------------------------------------------------- */ 4922ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 4932ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic ssize_t usb_udc_srp_store(struct device *dev, 4942ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi struct device_attribute *attr, const char *buf, size_t n) 4952ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi{ 4961d91a96268a0b2d7301c3ee67a784b712f34010fFelipe Balbi struct usb_udc *udc = container_of(dev, struct usb_udc, dev); 4972ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 4982ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi if (sysfs_streq(buf, "1")) 4992ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi usb_gadget_wakeup(udc->gadget); 5002ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 5012ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi return n; 5022ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi} 5032ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic DEVICE_ATTR(srp, S_IWUSR, NULL, usb_udc_srp_store); 5042ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 5052ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic ssize_t usb_udc_softconn_store(struct device *dev, 5062ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi struct device_attribute *attr, const char *buf, size_t n) 5072ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi{ 508865569ba5a8b0cc840e2b9c16ca6b42d6d5306b4Felipe Balbi struct usb_udc *udc = container_of(dev, struct usb_udc, dev); 5092ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 510bfa6b18c680450c17512c741ed1d818695747621Felipe Balbi if (!udc->driver) { 511bfa6b18c680450c17512c741ed1d818695747621Felipe Balbi dev_err(dev, "soft-connect without a gadget driver\n"); 512bfa6b18c680450c17512c741ed1d818695747621Felipe Balbi return -EOPNOTSUPP; 513bfa6b18c680450c17512c741ed1d818695747621Felipe Balbi } 514bfa6b18c680450c17512c741ed1d818695747621Felipe Balbi 5152ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi if (sysfs_streq(buf, "connect")) { 5162d7ebbb0946e9e13285eee348df1dbc48f0580e0Felipe Balbi usb_gadget_udc_start(udc->gadget, udc->driver); 5172ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi usb_gadget_connect(udc->gadget); 5182ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi } else if (sysfs_streq(buf, "disconnect")) { 51983a787a71e034244a9fd1d5988fe18f226341417Felipe Balbi usb_gadget_disconnect(udc->gadget); 5202d7ebbb0946e9e13285eee348df1dbc48f0580e0Felipe Balbi usb_gadget_udc_stop(udc->gadget, udc->driver); 5212ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi } else { 5222ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi dev_err(dev, "unsupported command '%s'\n", buf); 5232ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi return -EINVAL; 5242ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi } 5252ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 5262ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi return n; 5272ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi} 5282ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic DEVICE_ATTR(soft_connect, S_IWUSR, NULL, usb_udc_softconn_store); 5292ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 530ce26bd23d4ad180883f53709f9a2220dc771c030Greg Kroah-Hartmanstatic ssize_t state_show(struct device *dev, struct device_attribute *attr, 531ce26bd23d4ad180883f53709f9a2220dc771c030Greg Kroah-Hartman char *buf) 53249401f4169c0e5a1b38f1a676d6f12eecaf77485Felipe Balbi{ 53349401f4169c0e5a1b38f1a676d6f12eecaf77485Felipe Balbi struct usb_udc *udc = container_of(dev, struct usb_udc, dev); 53449401f4169c0e5a1b38f1a676d6f12eecaf77485Felipe Balbi struct usb_gadget *gadget = udc->gadget; 53549401f4169c0e5a1b38f1a676d6f12eecaf77485Felipe Balbi 53649401f4169c0e5a1b38f1a676d6f12eecaf77485Felipe Balbi return sprintf(buf, "%s\n", usb_state_string(gadget->state)); 53749401f4169c0e5a1b38f1a676d6f12eecaf77485Felipe Balbi} 538ce26bd23d4ad180883f53709f9a2220dc771c030Greg Kroah-Hartmanstatic DEVICE_ATTR_RO(state); 53949401f4169c0e5a1b38f1a676d6f12eecaf77485Felipe Balbi 540d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz#define USB_UDC_SPEED_ATTR(name, param) \ 541ce26bd23d4ad180883f53709f9a2220dc771c030Greg Kroah-Hartmanssize_t name##_show(struct device *dev, \ 542d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz struct device_attribute *attr, char *buf) \ 543d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz{ \ 544d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \ 545d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz return snprintf(buf, PAGE_SIZE, "%s\n", \ 546d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz usb_speed_string(udc->gadget->param)); \ 547d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz} \ 548ce26bd23d4ad180883f53709f9a2220dc771c030Greg Kroah-Hartmanstatic DEVICE_ATTR_RO(name) 549d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz 550d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewiczstatic USB_UDC_SPEED_ATTR(current_speed, speed); 551d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewiczstatic USB_UDC_SPEED_ATTR(maximum_speed, max_speed); 552d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz 5532ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi#define USB_UDC_ATTR(name) \ 554ce26bd23d4ad180883f53709f9a2220dc771c030Greg Kroah-Hartmanssize_t name##_show(struct device *dev, \ 5552ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi struct device_attribute *attr, char *buf) \ 5562ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi{ \ 557019f976e8f268a63b2fcbb662aa2f77f6b07bac6Sebastian Andrzej Siewior struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \ 5582ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi struct usb_gadget *gadget = udc->gadget; \ 5592ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi \ 5602ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi return snprintf(buf, PAGE_SIZE, "%d\n", gadget->name); \ 5612ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi} \ 562ce26bd23d4ad180883f53709f9a2220dc771c030Greg Kroah-Hartmanstatic DEVICE_ATTR_RO(name) 5632ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 5642ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic USB_UDC_ATTR(is_otg); 5652ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic USB_UDC_ATTR(is_a_peripheral); 5662ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic USB_UDC_ATTR(b_hnp_enable); 5672ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic USB_UDC_ATTR(a_hnp_support); 5682ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic USB_UDC_ATTR(a_alt_hnp_support); 5692ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 5702ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic struct attribute *usb_udc_attrs[] = { 5712ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi &dev_attr_srp.attr, 5722ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi &dev_attr_soft_connect.attr, 57349401f4169c0e5a1b38f1a676d6f12eecaf77485Felipe Balbi &dev_attr_state.attr, 574d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz &dev_attr_current_speed.attr, 575d327ab5b6d660d6fe22b073b743fde1668e593bbMichal Nazarewicz &dev_attr_maximum_speed.attr, 5762ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 5772ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi &dev_attr_is_otg.attr, 5782ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi &dev_attr_is_a_peripheral.attr, 5792ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi &dev_attr_b_hnp_enable.attr, 5802ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi &dev_attr_a_hnp_support.attr, 5812ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi &dev_attr_a_alt_hnp_support.attr, 5822ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi NULL, 5832ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi}; 5842ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 5852ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic const struct attribute_group usb_udc_attr_group = { 5862ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi .attrs = usb_udc_attrs, 5872ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi}; 5882ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 5892ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic const struct attribute_group *usb_udc_attr_groups[] = { 5902ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi &usb_udc_attr_group, 5912ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi NULL, 5922ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi}; 5932ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 5942ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic int usb_udc_uevent(struct device *dev, struct kobj_uevent_env *env) 5952ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi{ 5962ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi struct usb_udc *udc = container_of(dev, struct usb_udc, dev); 5972ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi int ret; 5982ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 5992ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi ret = add_uevent_var(env, "USB_UDC_NAME=%s", udc->gadget->name); 6002ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi if (ret) { 6012ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi dev_err(dev, "failed to add uevent USB_UDC_NAME\n"); 6022ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi return ret; 6032ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi } 6042ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 6052ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi if (udc->driver) { 6062ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi ret = add_uevent_var(env, "USB_UDC_DRIVER=%s", 6072ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi udc->driver->function); 6082ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi if (ret) { 6092ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi dev_err(dev, "failed to add uevent USB_UDC_DRIVER\n"); 6102ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi return ret; 6112ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi } 6122ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi } 6132ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 6142ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi return 0; 6152ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi} 6162ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 6172ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic int __init usb_udc_init(void) 6182ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi{ 6192ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi udc_class = class_create(THIS_MODULE, "udc"); 6202ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi if (IS_ERR(udc_class)) { 6212ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi pr_err("failed to create udc class --> %ld\n", 6222ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi PTR_ERR(udc_class)); 6232ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi return PTR_ERR(udc_class); 6242ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi } 6252ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 6262ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi udc_class->dev_uevent = usb_udc_uevent; 6272ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi return 0; 6282ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi} 6292ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbisubsys_initcall(usb_udc_init); 6302ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 6312ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbistatic void __exit usb_udc_exit(void) 6322ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi{ 6332ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi class_destroy(udc_class); 6342ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi} 6352ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbimodule_exit(usb_udc_exit); 6362ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe Balbi 6372ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe BalbiMODULE_DESCRIPTION("UDC Framework"); 6382ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe BalbiMODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); 6392ccea03a8f7ec93641791f2760d7cdc6cab6205fFelipe BalbiMODULE_LICENSE("GPL v2"); 640