linux-stable/drivers/usb/core/endpoint.c
Lan Tianyu 2d36684659 usb/endpoint: Set release callback in the struct device_type instead of in the device itself directly
For following the way the rest of the usb core does, this patch is to change
the place of setting release callback.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-08-20 14:38:08 -07:00

218 lines
5.1 KiB
C

/*
* drivers/usb/core/endpoint.c
*
* (C) Copyright 2002,2004,2006 Greg Kroah-Hartman
* (C) Copyright 2002,2004 IBM Corp.
* (C) Copyright 2006 Novell Inc.
*
* Endpoint sysfs stuff
*
*/
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/idr.h>
#include <linux/usb.h>
#include "usb.h"
struct ep_device {
struct usb_endpoint_descriptor *desc;
struct usb_device *udev;
struct device dev;
};
#define to_ep_device(_dev) \
container_of(_dev, struct ep_device, dev)
struct ep_attribute {
struct attribute attr;
ssize_t (*show)(struct usb_device *,
struct usb_endpoint_descriptor *, char *);
};
#define to_ep_attribute(_attr) \
container_of(_attr, struct ep_attribute, attr)
#define usb_ep_attr(field, format_string) \
static ssize_t show_ep_##field(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct ep_device *ep = to_ep_device(dev); \
return sprintf(buf, format_string, ep->desc->field); \
} \
static DEVICE_ATTR(field, S_IRUGO, show_ep_##field, NULL);
usb_ep_attr(bLength, "%02x\n")
usb_ep_attr(bEndpointAddress, "%02x\n")
usb_ep_attr(bmAttributes, "%02x\n")
usb_ep_attr(bInterval, "%02x\n")
static ssize_t show_ep_wMaxPacketSize(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ep_device *ep = to_ep_device(dev);
return sprintf(buf, "%04x\n",
usb_endpoint_maxp(ep->desc) & 0x07ff);
}
static DEVICE_ATTR(wMaxPacketSize, S_IRUGO, show_ep_wMaxPacketSize, NULL);
static ssize_t show_ep_type(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct ep_device *ep = to_ep_device(dev);
char *type = "unknown";
switch (usb_endpoint_type(ep->desc)) {
case USB_ENDPOINT_XFER_CONTROL:
type = "Control";
break;
case USB_ENDPOINT_XFER_ISOC:
type = "Isoc";
break;
case USB_ENDPOINT_XFER_BULK:
type = "Bulk";
break;
case USB_ENDPOINT_XFER_INT:
type = "Interrupt";
break;
}
return sprintf(buf, "%s\n", type);
}
static DEVICE_ATTR(type, S_IRUGO, show_ep_type, NULL);
static ssize_t show_ep_interval(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ep_device *ep = to_ep_device(dev);
char unit;
unsigned interval = 0;
unsigned in;
in = (ep->desc->bEndpointAddress & USB_DIR_IN);
switch (usb_endpoint_type(ep->desc)) {
case USB_ENDPOINT_XFER_CONTROL:
if (ep->udev->speed == USB_SPEED_HIGH)
/* uframes per NAK */
interval = ep->desc->bInterval;
break;
case USB_ENDPOINT_XFER_ISOC:
interval = 1 << (ep->desc->bInterval - 1);
break;
case USB_ENDPOINT_XFER_BULK:
if (ep->udev->speed == USB_SPEED_HIGH && !in)
/* uframes per NAK */
interval = ep->desc->bInterval;
break;
case USB_ENDPOINT_XFER_INT:
if (ep->udev->speed == USB_SPEED_HIGH)
interval = 1 << (ep->desc->bInterval - 1);
else
interval = ep->desc->bInterval;
break;
}
interval *= (ep->udev->speed == USB_SPEED_HIGH) ? 125 : 1000;
if (interval % 1000)
unit = 'u';
else {
unit = 'm';
interval /= 1000;
}
return sprintf(buf, "%d%cs\n", interval, unit);
}
static DEVICE_ATTR(interval, S_IRUGO, show_ep_interval, NULL);
static ssize_t show_ep_direction(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ep_device *ep = to_ep_device(dev);
char *direction;
if (usb_endpoint_xfer_control(ep->desc))
direction = "both";
else if (usb_endpoint_dir_in(ep->desc))
direction = "in";
else
direction = "out";
return sprintf(buf, "%s\n", direction);
}
static DEVICE_ATTR(direction, S_IRUGO, show_ep_direction, NULL);
static struct attribute *ep_dev_attrs[] = {
&dev_attr_bLength.attr,
&dev_attr_bEndpointAddress.attr,
&dev_attr_bmAttributes.attr,
&dev_attr_bInterval.attr,
&dev_attr_wMaxPacketSize.attr,
&dev_attr_interval.attr,
&dev_attr_type.attr,
&dev_attr_direction.attr,
NULL,
};
static struct attribute_group ep_dev_attr_grp = {
.attrs = ep_dev_attrs,
};
static const struct attribute_group *ep_dev_groups[] = {
&ep_dev_attr_grp,
NULL
};
static void ep_device_release(struct device *dev)
{
struct ep_device *ep_dev = to_ep_device(dev);
kfree(ep_dev);
}
struct device_type usb_ep_device_type = {
.name = "usb_endpoint",
.release = ep_device_release,
};
int usb_create_ep_devs(struct device *parent,
struct usb_host_endpoint *endpoint,
struct usb_device *udev)
{
struct ep_device *ep_dev;
int retval;
ep_dev = kzalloc(sizeof(*ep_dev), GFP_KERNEL);
if (!ep_dev) {
retval = -ENOMEM;
goto exit;
}
ep_dev->desc = &endpoint->desc;
ep_dev->udev = udev;
ep_dev->dev.groups = ep_dev_groups;
ep_dev->dev.type = &usb_ep_device_type;
ep_dev->dev.parent = parent;
dev_set_name(&ep_dev->dev, "ep_%02x", endpoint->desc.bEndpointAddress);
retval = device_register(&ep_dev->dev);
if (retval)
goto error_register;
device_enable_async_suspend(&ep_dev->dev);
endpoint->ep_dev = ep_dev;
return retval;
error_register:
put_device(&ep_dev->dev);
exit:
return retval;
}
void usb_remove_ep_devs(struct usb_host_endpoint *endpoint)
{
struct ep_device *ep_dev = endpoint->ep_dev;
if (ep_dev) {
device_unregister(&ep_dev->dev);
endpoint->ep_dev = NULL;
}
}