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/*
* 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/usb.h>
#include "usb.h"
/* endpoint stuff */
struct ep_object {
struct usb_endpoint_descriptor *desc;
struct usb_device *udev;
struct kobject kobj;
};
#define to_ep_object(_kobj) \
container_of(_kobj, struct ep_object, kobj)
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 EP_ATTR(_name) \
struct ep_attribute ep_##_name = { \
.attr = {.name = #_name, .owner = THIS_MODULE, \
.mode = S_IRUGO}, \
.show = show_ep_##_name}
#define usb_ep_attr(field, format_string) \
static ssize_t show_ep_##field(struct usb_device *udev, \
struct usb_endpoint_descriptor *desc, \
char *buf) \
{ \
return sprintf(buf, format_string, desc->field); \
} \
static EP_ATTR(field);
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 usb_device *udev,
struct usb_endpoint_descriptor *desc, char *buf)
{
return sprintf(buf, "%04x\n",
le16_to_cpu(desc->wMaxPacketSize) & 0x07ff);
}
static EP_ATTR(wMaxPacketSize);
static ssize_t show_ep_type(struct usb_device *udev,
struct usb_endpoint_descriptor *desc, char *buf)
{
char *type = "unknown";
switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
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 EP_ATTR(type);
static ssize_t show_ep_interval(struct usb_device *udev,
struct usb_endpoint_descriptor *desc, char *buf)
{
char unit;
unsigned interval = 0;
unsigned in;
in = (desc->bEndpointAddress & USB_DIR_IN);
switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
case USB_ENDPOINT_XFER_CONTROL:
if (udev->speed == USB_SPEED_HIGH) /* uframes per NAK */
interval = desc->bInterval;
break;
case USB_ENDPOINT_XFER_ISOC:
interval = 1 << (desc->bInterval - 1);
break;
case USB_ENDPOINT_XFER_BULK:
if (udev->speed == USB_SPEED_HIGH && !in) /* uframes per NAK */
interval = desc->bInterval;
break;
case USB_ENDPOINT_XFER_INT:
if (udev->speed == USB_SPEED_HIGH)
interval = 1 << (desc->bInterval - 1);
else
interval = desc->bInterval;
break;
}
interval *= (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 EP_ATTR(interval);
static ssize_t show_ep_direction(struct usb_device *udev,
struct usb_endpoint_descriptor *desc, char *buf)
{
char *direction;
if ((desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
USB_ENDPOINT_XFER_CONTROL)
direction = "both";
else if (desc->bEndpointAddress & USB_DIR_IN)
direction = "in";
else
direction = "out";
return sprintf(buf, "%s\n", direction);
}
static EP_ATTR(direction);
static struct attribute *ep_attrs[] = {
&ep_bLength.attr,
&ep_bEndpointAddress.attr,
&ep_bmAttributes.attr,
&ep_bInterval.attr,
&ep_wMaxPacketSize.attr,
&ep_type.attr,
&ep_interval.attr,
&ep_direction.attr,
NULL,
};
static void ep_object_release(struct kobject *kobj)
{
kfree(to_ep_object(kobj));
}
static ssize_t ep_object_show(struct kobject *kobj, struct attribute *attr,
char *buf)
{
struct ep_object *ep_obj = to_ep_object(kobj);
struct ep_attribute *ep_attr = to_ep_attribute(attr);
return (ep_attr->show)(ep_obj->udev, ep_obj->desc, buf);
}
static struct sysfs_ops ep_object_sysfs_ops = {
.show = ep_object_show,
};
static struct kobj_type ep_object_ktype = {
.release = ep_object_release,
.sysfs_ops = &ep_object_sysfs_ops,
.default_attrs = ep_attrs,
};
void usb_create_ep_files(struct device *parent,
struct usb_host_endpoint *endpoint,
struct usb_device *udev)
{
struct ep_object *ep_obj;
struct kobject *kobj;
ep_obj = kzalloc(sizeof(struct ep_object), GFP_KERNEL);
if (!ep_obj)
return;
ep_obj->desc = &endpoint->desc;
ep_obj->udev = udev;
kobj = &ep_obj->kobj;
kobject_set_name(kobj, "ep_%02x", endpoint->desc.bEndpointAddress);
kobj->parent = &parent->kobj;
kobj->ktype = &ep_object_ktype;
/* Don't use kobject_register, because it generates a hotplug event */
kobject_init(kobj);
if (kobject_add(kobj) == 0)
endpoint->kobj = kobj;
else
kobject_put(kobj);
}
void usb_remove_ep_files(struct usb_host_endpoint *endpoint)
{
if (endpoint->kobj) {
kobject_del(endpoint->kobj);
kobject_put(endpoint->kobj);
endpoint->kobj = NULL;
}
}
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