2011-06-28 13:33:46 +00:00
|
|
|
/**
|
|
|
|
* udc.c - Core UDC Framework
|
|
|
|
*
|
|
|
|
* Copyright (C) 2010 Texas Instruments
|
|
|
|
* Author: Felipe Balbi <balbi@ti.com>
|
|
|
|
*
|
|
|
|
* This program is free software: you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU General Public License version 2 of
|
|
|
|
* the License as published by the Free Software Foundation.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
* GNU General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/device.h>
|
|
|
|
#include <linux/list.h>
|
|
|
|
#include <linux/err.h>
|
2011-12-15 11:31:48 +00:00
|
|
|
#include <linux/dma-mapping.h>
|
2013-07-17 08:09:49 +00:00
|
|
|
#include <linux/workqueue.h>
|
2011-06-28 13:33:46 +00:00
|
|
|
|
|
|
|
#include <linux/usb/ch9.h>
|
|
|
|
#include <linux/usb/gadget.h>
|
|
|
|
|
|
|
|
/**
|
|
|
|
* struct usb_udc - describes one usb device controller
|
|
|
|
* @driver - the gadget driver pointer. For use by the class code
|
|
|
|
* @dev - the child device to the actual controller
|
|
|
|
* @gadget - the gadget. For use by the class code
|
|
|
|
* @list - for use by the udc class driver
|
|
|
|
*
|
|
|
|
* This represents the internal data structure which is used by the UDC-class
|
|
|
|
* to hold information about udc driver and gadget together.
|
|
|
|
*/
|
|
|
|
struct usb_udc {
|
|
|
|
struct usb_gadget_driver *driver;
|
|
|
|
struct usb_gadget *gadget;
|
|
|
|
struct device dev;
|
|
|
|
struct list_head list;
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct class *udc_class;
|
|
|
|
static LIST_HEAD(udc_list);
|
|
|
|
static DEFINE_MUTEX(udc_lock);
|
|
|
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
|
2013-07-12 15:06:21 +00:00
|
|
|
#ifdef CONFIG_HAS_DMA
|
|
|
|
|
2011-12-15 11:31:48 +00:00
|
|
|
int usb_gadget_map_request(struct usb_gadget *gadget,
|
|
|
|
struct usb_request *req, int is_in)
|
|
|
|
{
|
|
|
|
if (req->length == 0)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (req->num_sgs) {
|
|
|
|
int mapped;
|
|
|
|
|
|
|
|
mapped = dma_map_sg(&gadget->dev, req->sg, req->num_sgs,
|
|
|
|
is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
|
|
|
|
if (mapped == 0) {
|
|
|
|
dev_err(&gadget->dev, "failed to map SGs\n");
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
|
|
|
|
req->num_mapped_sgs = mapped;
|
|
|
|
} else {
|
|
|
|
req->dma = dma_map_single(&gadget->dev, req->buf, req->length,
|
|
|
|
is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
|
|
|
|
|
|
|
|
if (dma_mapping_error(&gadget->dev, req->dma)) {
|
|
|
|
dev_err(&gadget->dev, "failed to map buffer\n");
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(usb_gadget_map_request);
|
|
|
|
|
|
|
|
void usb_gadget_unmap_request(struct usb_gadget *gadget,
|
|
|
|
struct usb_request *req, int is_in)
|
|
|
|
{
|
|
|
|
if (req->length == 0)
|
|
|
|
return;
|
|
|
|
|
|
|
|
if (req->num_mapped_sgs) {
|
|
|
|
dma_unmap_sg(&gadget->dev, req->sg, req->num_mapped_sgs,
|
|
|
|
is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
|
|
|
|
|
|
|
|
req->num_mapped_sgs = 0;
|
|
|
|
} else {
|
|
|
|
dma_unmap_single(&gadget->dev, req->dma, req->length,
|
|
|
|
is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(usb_gadget_unmap_request);
|
|
|
|
|
2013-07-12 15:06:21 +00:00
|
|
|
#endif /* CONFIG_HAS_DMA */
|
|
|
|
|
2011-12-15 11:31:48 +00:00
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
|
2013-07-17 08:09:49 +00:00
|
|
|
static void usb_gadget_state_work(struct work_struct *work)
|
|
|
|
{
|
|
|
|
struct usb_gadget *gadget = work_to_gadget(work);
|
|
|
|
|
2013-08-13 22:28:01 +00:00
|
|
|
sysfs_notify(&gadget->dev.kobj, NULL, "state");
|
2013-07-17 08:09:49 +00:00
|
|
|
}
|
|
|
|
|
2011-12-19 10:57:04 +00:00
|
|
|
void usb_gadget_set_state(struct usb_gadget *gadget,
|
|
|
|
enum usb_device_state state)
|
|
|
|
{
|
|
|
|
gadget->state = state;
|
2013-07-17 08:09:49 +00:00
|
|
|
schedule_work(&gadget->work);
|
2011-12-19 10:57:04 +00:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(usb_gadget_set_state);
|
|
|
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
|
2011-06-23 12:26:15 +00:00
|
|
|
/**
|
|
|
|
* usb_gadget_udc_start - tells usb device controller to start up
|
|
|
|
* @gadget: The gadget we want to get started
|
|
|
|
* @driver: The driver we want to bind to @gadget
|
|
|
|
*
|
|
|
|
* This call is issued by the UDC Class driver when it's about
|
|
|
|
* to register a gadget driver to the device controller, before
|
|
|
|
* calling gadget driver's bind() method.
|
|
|
|
*
|
|
|
|
* It allows the controller to be powered off until strictly
|
|
|
|
* necessary to have it powered on.
|
|
|
|
*
|
|
|
|
* Returns zero on success, else negative errno.
|
|
|
|
*/
|
|
|
|
static inline int usb_gadget_udc_start(struct usb_gadget *gadget,
|
|
|
|
struct usb_gadget_driver *driver)
|
|
|
|
{
|
|
|
|
return gadget->ops->udc_start(gadget, driver);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_gadget_udc_stop - tells usb device controller we don't need it anymore
|
|
|
|
* @gadget: The device we want to stop activity
|
|
|
|
* @driver: The driver to unbind from @gadget
|
|
|
|
*
|
|
|
|
* This call is issued by the UDC Class driver after calling
|
|
|
|
* gadget driver's unbind() method.
|
|
|
|
*
|
|
|
|
* The details are implementation specific, but it can go as
|
|
|
|
* far as powering off UDC completely and disable its data
|
|
|
|
* line pullups.
|
|
|
|
*/
|
|
|
|
static inline void usb_gadget_udc_stop(struct usb_gadget *gadget,
|
|
|
|
struct usb_gadget_driver *driver)
|
|
|
|
{
|
|
|
|
gadget->ops->udc_stop(gadget, driver);
|
|
|
|
}
|
|
|
|
|
2011-06-28 13:33:46 +00:00
|
|
|
/**
|
|
|
|
* usb_udc_release - release the usb_udc struct
|
|
|
|
* @dev: the dev member within usb_udc
|
|
|
|
*
|
|
|
|
* This is called by driver's core in order to free memory once the last
|
|
|
|
* reference is released.
|
|
|
|
*/
|
|
|
|
static void usb_udc_release(struct device *dev)
|
|
|
|
{
|
|
|
|
struct usb_udc *udc;
|
|
|
|
|
|
|
|
udc = container_of(dev, struct usb_udc, dev);
|
|
|
|
dev_dbg(dev, "releasing '%s'\n", dev_name(dev));
|
|
|
|
kfree(udc);
|
|
|
|
}
|
|
|
|
|
2011-06-23 12:28:38 +00:00
|
|
|
static const struct attribute_group *usb_udc_attr_groups[];
|
2013-02-26 12:47:44 +00:00
|
|
|
|
|
|
|
static void usb_udc_nop_release(struct device *dev)
|
|
|
|
{
|
|
|
|
dev_vdbg(dev, "%s\n", __func__);
|
|
|
|
}
|
|
|
|
|
2011-06-28 13:33:46 +00:00
|
|
|
/**
|
2013-02-26 12:47:44 +00:00
|
|
|
* usb_add_gadget_udc_release - adds a new gadget to the udc class driver list
|
|
|
|
* @parent: the parent device to this udc. Usually the controller driver's
|
|
|
|
* device.
|
|
|
|
* @gadget: the gadget to be added to the list.
|
|
|
|
* @release: a gadget release function.
|
2011-06-28 13:33:46 +00:00
|
|
|
*
|
|
|
|
* Returns zero on success, negative errno otherwise.
|
|
|
|
*/
|
2013-02-26 12:47:44 +00:00
|
|
|
int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget,
|
|
|
|
void (*release)(struct device *dev))
|
2011-06-28 13:33:46 +00:00
|
|
|
{
|
|
|
|
struct usb_udc *udc;
|
|
|
|
int ret = -ENOMEM;
|
|
|
|
|
|
|
|
udc = kzalloc(sizeof(*udc), GFP_KERNEL);
|
|
|
|
if (!udc)
|
|
|
|
goto err1;
|
|
|
|
|
2013-01-24 15:41:00 +00:00
|
|
|
dev_set_name(&gadget->dev, "gadget");
|
2013-07-17 08:09:49 +00:00
|
|
|
INIT_WORK(&gadget->work, usb_gadget_state_work);
|
2013-02-26 08:59:41 +00:00
|
|
|
gadget->dev.parent = parent;
|
2013-01-24 12:52:24 +00:00
|
|
|
|
2013-07-12 15:06:21 +00:00
|
|
|
#ifdef CONFIG_HAS_DMA
|
2013-02-26 08:50:42 +00:00
|
|
|
dma_set_coherent_mask(&gadget->dev, parent->coherent_dma_mask);
|
|
|
|
gadget->dev.dma_parms = parent->dma_parms;
|
|
|
|
gadget->dev.dma_mask = parent->dma_mask;
|
2013-07-12 15:06:21 +00:00
|
|
|
#endif
|
2013-02-26 08:50:42 +00:00
|
|
|
|
2013-02-26 13:25:41 +00:00
|
|
|
if (release)
|
2013-02-26 12:47:44 +00:00
|
|
|
gadget->dev.release = release;
|
2013-02-26 13:25:41 +00:00
|
|
|
else
|
|
|
|
gadget->dev.release = usb_udc_nop_release;
|
2013-02-26 12:47:44 +00:00
|
|
|
|
2013-01-24 15:41:00 +00:00
|
|
|
ret = device_register(&gadget->dev);
|
|
|
|
if (ret)
|
|
|
|
goto err2;
|
2013-01-24 12:52:24 +00:00
|
|
|
|
2011-06-28 13:33:46 +00:00
|
|
|
device_initialize(&udc->dev);
|
|
|
|
udc->dev.release = usb_udc_release;
|
|
|
|
udc->dev.class = udc_class;
|
2011-06-23 12:28:38 +00:00
|
|
|
udc->dev.groups = usb_udc_attr_groups;
|
2011-06-28 13:33:46 +00:00
|
|
|
udc->dev.parent = parent;
|
|
|
|
ret = dev_set_name(&udc->dev, "%s", kobject_name(&parent->kobj));
|
|
|
|
if (ret)
|
2013-01-24 12:52:24 +00:00
|
|
|
goto err3;
|
2011-06-28 13:33:46 +00:00
|
|
|
|
|
|
|
udc->gadget = gadget;
|
|
|
|
|
|
|
|
mutex_lock(&udc_lock);
|
|
|
|
list_add_tail(&udc->list, &udc_list);
|
|
|
|
|
|
|
|
ret = device_add(&udc->dev);
|
|
|
|
if (ret)
|
2013-01-24 12:52:24 +00:00
|
|
|
goto err4;
|
2011-06-28 13:33:46 +00:00
|
|
|
|
2011-12-19 10:57:04 +00:00
|
|
|
usb_gadget_set_state(gadget, USB_STATE_NOTATTACHED);
|
2011-06-28 13:33:46 +00:00
|
|
|
|
|
|
|
mutex_unlock(&udc_lock);
|
|
|
|
|
|
|
|
return 0;
|
2013-01-24 12:52:24 +00:00
|
|
|
|
|
|
|
err4:
|
2011-06-28 13:33:46 +00:00
|
|
|
list_del(&udc->list);
|
|
|
|
mutex_unlock(&udc_lock);
|
|
|
|
|
2013-01-24 12:52:24 +00:00
|
|
|
err3:
|
2011-06-28 13:33:46 +00:00
|
|
|
put_device(&udc->dev);
|
|
|
|
|
2013-01-24 12:52:24 +00:00
|
|
|
err2:
|
2013-01-24 15:41:00 +00:00
|
|
|
put_device(&gadget->dev);
|
2013-04-02 14:06:28 +00:00
|
|
|
kfree(udc);
|
2013-01-24 15:41:00 +00:00
|
|
|
|
2011-06-28 13:33:46 +00:00
|
|
|
err1:
|
|
|
|
return ret;
|
|
|
|
}
|
2013-02-26 12:47:44 +00:00
|
|
|
EXPORT_SYMBOL_GPL(usb_add_gadget_udc_release);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_add_gadget_udc - adds a new gadget to the udc class driver list
|
|
|
|
* @parent: the parent device to this udc. Usually the controller
|
|
|
|
* driver's device.
|
|
|
|
* @gadget: the gadget to be added to the list
|
|
|
|
*
|
|
|
|
* Returns zero on success, negative errno otherwise.
|
|
|
|
*/
|
|
|
|
int usb_add_gadget_udc(struct device *parent, struct usb_gadget *gadget)
|
|
|
|
{
|
|
|
|
return usb_add_gadget_udc_release(parent, gadget, NULL);
|
|
|
|
}
|
2011-06-28 13:33:46 +00:00
|
|
|
EXPORT_SYMBOL_GPL(usb_add_gadget_udc);
|
|
|
|
|
|
|
|
static void usb_gadget_remove_driver(struct usb_udc *udc)
|
|
|
|
{
|
|
|
|
dev_dbg(&udc->dev, "unregistering UDC driver [%s]\n",
|
|
|
|
udc->gadget->name);
|
|
|
|
|
|
|
|
kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE);
|
|
|
|
|
2013-01-24 09:00:15 +00:00
|
|
|
usb_gadget_disconnect(udc->gadget);
|
|
|
|
udc->driver->disconnect(udc->gadget);
|
|
|
|
udc->driver->unbind(udc->gadget);
|
2013-03-15 18:02:14 +00:00
|
|
|
usb_gadget_udc_stop(udc->gadget, NULL);
|
2011-06-28 13:33:46 +00:00
|
|
|
|
|
|
|
udc->driver = NULL;
|
|
|
|
udc->dev.driver = NULL;
|
2013-02-26 11:51:24 +00:00
|
|
|
udc->gadget->dev.driver = NULL;
|
2011-06-28 13:33:46 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_del_gadget_udc - deletes @udc from udc_list
|
|
|
|
* @gadget: the gadget to be removed.
|
|
|
|
*
|
|
|
|
* This, will call usb_gadget_unregister_driver() if
|
|
|
|
* the @udc is still busy.
|
|
|
|
*/
|
|
|
|
void usb_del_gadget_udc(struct usb_gadget *gadget)
|
|
|
|
{
|
|
|
|
struct usb_udc *udc = NULL;
|
|
|
|
|
|
|
|
mutex_lock(&udc_lock);
|
|
|
|
list_for_each_entry(udc, &udc_list, list)
|
|
|
|
if (udc->gadget == gadget)
|
|
|
|
goto found;
|
|
|
|
|
|
|
|
dev_err(gadget->dev.parent, "gadget not registered.\n");
|
|
|
|
mutex_unlock(&udc_lock);
|
|
|
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
found:
|
|
|
|
dev_vdbg(gadget->dev.parent, "unregistering gadget\n");
|
|
|
|
|
|
|
|
list_del(&udc->list);
|
|
|
|
mutex_unlock(&udc_lock);
|
|
|
|
|
|
|
|
if (udc->driver)
|
|
|
|
usb_gadget_remove_driver(udc);
|
|
|
|
|
|
|
|
kobject_uevent(&udc->dev.kobj, KOBJ_REMOVE);
|
2013-07-17 08:09:49 +00:00
|
|
|
flush_work(&gadget->work);
|
2011-06-28 13:33:46 +00:00
|
|
|
device_unregister(&udc->dev);
|
2013-01-24 15:41:00 +00:00
|
|
|
device_unregister(&gadget->dev);
|
2011-06-28 13:33:46 +00:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(usb_del_gadget_udc);
|
|
|
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
|
2012-12-23 20:10:19 +00:00
|
|
|
static int udc_bind_to_driver(struct usb_udc *udc, struct usb_gadget_driver *driver)
|
2011-06-28 13:33:46 +00:00
|
|
|
{
|
2012-12-23 20:10:19 +00:00
|
|
|
int ret;
|
2011-06-28 13:33:46 +00:00
|
|
|
|
|
|
|
dev_dbg(&udc->dev, "registering UDC driver [%s]\n",
|
|
|
|
driver->function);
|
|
|
|
|
|
|
|
udc->driver = driver;
|
|
|
|
udc->dev.driver = &driver->driver;
|
2013-02-26 11:51:24 +00:00
|
|
|
udc->gadget->dev.driver = &driver->driver;
|
2011-06-28 13:33:46 +00:00
|
|
|
|
2013-01-24 09:00:15 +00:00
|
|
|
ret = driver->bind(udc->gadget, driver);
|
|
|
|
if (ret)
|
|
|
|
goto err1;
|
|
|
|
ret = usb_gadget_udc_start(udc->gadget, driver);
|
|
|
|
if (ret) {
|
|
|
|
driver->unbind(udc->gadget);
|
|
|
|
goto err1;
|
2011-06-23 12:26:15 +00:00
|
|
|
}
|
2013-01-24 09:00:15 +00:00
|
|
|
usb_gadget_connect(udc->gadget);
|
2011-06-28 13:33:46 +00:00
|
|
|
|
|
|
|
kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE);
|
|
|
|
return 0;
|
|
|
|
err1:
|
2013-09-28 03:05:34 +00:00
|
|
|
if (ret != -EISNAM)
|
|
|
|
dev_err(&udc->dev, "failed to start %s: %d\n",
|
2011-06-28 13:33:46 +00:00
|
|
|
udc->driver->function, ret);
|
|
|
|
udc->driver = NULL;
|
|
|
|
udc->dev.driver = NULL;
|
2013-02-26 11:51:24 +00:00
|
|
|
udc->gadget->dev.driver = NULL;
|
2012-12-23 20:10:19 +00:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int udc_attach_driver(const char *name, struct usb_gadget_driver *driver)
|
|
|
|
{
|
|
|
|
struct usb_udc *udc = NULL;
|
|
|
|
int ret = -ENODEV;
|
|
|
|
|
|
|
|
mutex_lock(&udc_lock);
|
|
|
|
list_for_each_entry(udc, &udc_list, list) {
|
|
|
|
ret = strcmp(name, dev_name(&udc->dev));
|
|
|
|
if (!ret)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (ret) {
|
|
|
|
ret = -ENODEV;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
if (udc->driver) {
|
|
|
|
ret = -EBUSY;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
ret = udc_bind_to_driver(udc, driver);
|
|
|
|
out:
|
|
|
|
mutex_unlock(&udc_lock);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(udc_attach_driver);
|
|
|
|
|
|
|
|
int usb_gadget_probe_driver(struct usb_gadget_driver *driver)
|
|
|
|
{
|
|
|
|
struct usb_udc *udc = NULL;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!driver || !driver->bind || !driver->setup)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
mutex_lock(&udc_lock);
|
|
|
|
list_for_each_entry(udc, &udc_list, list) {
|
|
|
|
/* For now we take the first one */
|
|
|
|
if (!udc->driver)
|
|
|
|
goto found;
|
|
|
|
}
|
|
|
|
|
|
|
|
pr_debug("couldn't find an available UDC\n");
|
|
|
|
mutex_unlock(&udc_lock);
|
|
|
|
return -ENODEV;
|
|
|
|
found:
|
|
|
|
ret = udc_bind_to_driver(udc, driver);
|
2011-06-28 13:33:46 +00:00
|
|
|
mutex_unlock(&udc_lock);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(usb_gadget_probe_driver);
|
|
|
|
|
|
|
|
int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
|
|
|
|
{
|
|
|
|
struct usb_udc *udc = NULL;
|
|
|
|
int ret = -ENODEV;
|
|
|
|
|
|
|
|
if (!driver || !driver->unbind)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
mutex_lock(&udc_lock);
|
|
|
|
list_for_each_entry(udc, &udc_list, list)
|
|
|
|
if (udc->driver == driver) {
|
|
|
|
usb_gadget_remove_driver(udc);
|
|
|
|
ret = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
mutex_unlock(&udc_lock);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(usb_gadget_unregister_driver);
|
|
|
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
|
|
|
|
static ssize_t usb_udc_srp_store(struct device *dev,
|
|
|
|
struct device_attribute *attr, const char *buf, size_t n)
|
|
|
|
{
|
2011-09-08 11:11:17 +00:00
|
|
|
struct usb_udc *udc = container_of(dev, struct usb_udc, dev);
|
2011-06-28 13:33:46 +00:00
|
|
|
|
|
|
|
if (sysfs_streq(buf, "1"))
|
|
|
|
usb_gadget_wakeup(udc->gadget);
|
|
|
|
|
|
|
|
return n;
|
|
|
|
}
|
|
|
|
static DEVICE_ATTR(srp, S_IWUSR, NULL, usb_udc_srp_store);
|
|
|
|
|
|
|
|
static ssize_t usb_udc_softconn_store(struct device *dev,
|
|
|
|
struct device_attribute *attr, const char *buf, size_t n)
|
|
|
|
{
|
2011-09-08 11:12:18 +00:00
|
|
|
struct usb_udc *udc = container_of(dev, struct usb_udc, dev);
|
2011-06-28 13:33:46 +00:00
|
|
|
|
|
|
|
if (sysfs_streq(buf, "connect")) {
|
2013-01-24 09:00:15 +00:00
|
|
|
usb_gadget_udc_start(udc->gadget, udc->driver);
|
2011-06-28 13:33:46 +00:00
|
|
|
usb_gadget_connect(udc->gadget);
|
|
|
|
} else if (sysfs_streq(buf, "disconnect")) {
|
2012-04-27 08:02:15 +00:00
|
|
|
usb_gadget_disconnect(udc->gadget);
|
2013-01-24 09:00:15 +00:00
|
|
|
usb_gadget_udc_stop(udc->gadget, udc->driver);
|
2011-06-28 13:33:46 +00:00
|
|
|
} else {
|
|
|
|
dev_err(dev, "unsupported command '%s'\n", buf);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return n;
|
|
|
|
}
|
|
|
|
static DEVICE_ATTR(soft_connect, S_IWUSR, NULL, usb_udc_softconn_store);
|
|
|
|
|
2013-08-23 23:34:43 +00:00
|
|
|
static ssize_t state_show(struct device *dev, struct device_attribute *attr,
|
|
|
|
char *buf)
|
2011-12-19 10:57:04 +00:00
|
|
|
{
|
|
|
|
struct usb_udc *udc = container_of(dev, struct usb_udc, dev);
|
|
|
|
struct usb_gadget *gadget = udc->gadget;
|
|
|
|
|
|
|
|
return sprintf(buf, "%s\n", usb_state_string(gadget->state));
|
|
|
|
}
|
2013-08-23 23:34:43 +00:00
|
|
|
static DEVICE_ATTR_RO(state);
|
2011-12-19 10:57:04 +00:00
|
|
|
|
2011-11-19 17:27:37 +00:00
|
|
|
#define USB_UDC_SPEED_ATTR(name, param) \
|
2013-08-23 23:34:43 +00:00
|
|
|
ssize_t name##_show(struct device *dev, \
|
2011-11-19 17:27:37 +00:00
|
|
|
struct device_attribute *attr, char *buf) \
|
|
|
|
{ \
|
|
|
|
struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%s\n", \
|
|
|
|
usb_speed_string(udc->gadget->param)); \
|
|
|
|
} \
|
2013-08-23 23:34:43 +00:00
|
|
|
static DEVICE_ATTR_RO(name)
|
2011-11-19 17:27:37 +00:00
|
|
|
|
|
|
|
static USB_UDC_SPEED_ATTR(current_speed, speed);
|
|
|
|
static USB_UDC_SPEED_ATTR(maximum_speed, max_speed);
|
|
|
|
|
2011-06-28 13:33:46 +00:00
|
|
|
#define USB_UDC_ATTR(name) \
|
2013-08-23 23:34:43 +00:00
|
|
|
ssize_t name##_show(struct device *dev, \
|
2011-06-28 13:33:46 +00:00
|
|
|
struct device_attribute *attr, char *buf) \
|
|
|
|
{ \
|
2011-06-23 12:28:38 +00:00
|
|
|
struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \
|
2011-06-28 13:33:46 +00:00
|
|
|
struct usb_gadget *gadget = udc->gadget; \
|
|
|
|
\
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", gadget->name); \
|
|
|
|
} \
|
2013-08-23 23:34:43 +00:00
|
|
|
static DEVICE_ATTR_RO(name)
|
2011-06-28 13:33:46 +00:00
|
|
|
|
|
|
|
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,
|
2011-12-19 10:57:04 +00:00
|
|
|
&dev_attr_state.attr,
|
2011-11-19 17:27:37 +00:00
|
|
|
&dev_attr_current_speed.attr,
|
|
|
|
&dev_attr_maximum_speed.attr,
|
2011-06-28 13:33:46 +00:00
|
|
|
|
|
|
|
&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");
|