2006-06-14 13:14:34 -06:00
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/*
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* drivers/usb/core/endpoint.c
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*
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* (C) Copyright 2002,2004,2006 Greg Kroah-Hartman
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* (C) Copyright 2002,2004 IBM Corp.
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* (C) Copyright 2006 Novell Inc.
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*
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* Endpoint sysfs stuff
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*
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*/
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#include <linux/kernel.h>
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#include <linux/usb.h>
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#include "usb.h"
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/* endpoint stuff */
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struct ep_object {
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struct usb_endpoint_descriptor *desc;
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struct usb_device *udev;
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struct kobject kobj;
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};
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#define to_ep_object(_kobj) \
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container_of(_kobj, struct ep_object, kobj)
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struct ep_attribute {
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struct attribute attr;
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ssize_t (*show)(struct usb_device *,
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struct usb_endpoint_descriptor *, char *);
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};
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#define to_ep_attribute(_attr) \
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container_of(_attr, struct ep_attribute, attr)
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#define EP_ATTR(_name) \
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struct ep_attribute ep_##_name = { \
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.attr = {.name = #_name, .owner = THIS_MODULE, \
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.mode = S_IRUGO}, \
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.show = show_ep_##_name}
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#define usb_ep_attr(field, format_string) \
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static ssize_t show_ep_##field(struct usb_device *udev, \
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struct usb_endpoint_descriptor *desc, \
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char *buf) \
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{ \
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return sprintf(buf, format_string, desc->field); \
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} \
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static EP_ATTR(field);
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usb_ep_attr(bLength, "%02x\n")
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usb_ep_attr(bEndpointAddress, "%02x\n")
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usb_ep_attr(bmAttributes, "%02x\n")
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usb_ep_attr(bInterval, "%02x\n")
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static ssize_t show_ep_wMaxPacketSize(struct usb_device *udev,
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struct usb_endpoint_descriptor *desc, char *buf)
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{
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return sprintf(buf, "%04x\n",
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le16_to_cpu(desc->wMaxPacketSize) & 0x07ff);
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}
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static EP_ATTR(wMaxPacketSize);
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static ssize_t show_ep_type(struct usb_device *udev,
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struct usb_endpoint_descriptor *desc, char *buf)
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{
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char *type = "unknown";
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switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
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case USB_ENDPOINT_XFER_CONTROL:
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type = "Control";
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break;
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case USB_ENDPOINT_XFER_ISOC:
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type = "Isoc";
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break;
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case USB_ENDPOINT_XFER_BULK:
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type = "Bulk";
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break;
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case USB_ENDPOINT_XFER_INT:
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type = "Interrupt";
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break;
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}
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return sprintf(buf, "%s\n", type);
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}
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static EP_ATTR(type);
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static ssize_t show_ep_interval(struct usb_device *udev,
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struct usb_endpoint_descriptor *desc, char *buf)
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{
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char unit;
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unsigned interval = 0;
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unsigned in;
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in = (desc->bEndpointAddress & USB_DIR_IN);
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switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
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case USB_ENDPOINT_XFER_CONTROL:
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if (udev->speed == USB_SPEED_HIGH) /* uframes per NAK */
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interval = desc->bInterval;
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break;
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case USB_ENDPOINT_XFER_ISOC:
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interval = 1 << (desc->bInterval - 1);
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break;
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case USB_ENDPOINT_XFER_BULK:
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if (udev->speed == USB_SPEED_HIGH && !in) /* uframes per NAK */
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interval = desc->bInterval;
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break;
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case USB_ENDPOINT_XFER_INT:
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if (udev->speed == USB_SPEED_HIGH)
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interval = 1 << (desc->bInterval - 1);
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else
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interval = desc->bInterval;
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break;
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}
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interval *= (udev->speed == USB_SPEED_HIGH) ? 125 : 1000;
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if (interval % 1000)
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unit = 'u';
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else {
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unit = 'm';
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interval /= 1000;
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}
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return sprintf(buf, "%d%cs\n", interval, unit);
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}
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static EP_ATTR(interval);
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static ssize_t show_ep_direction(struct usb_device *udev,
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struct usb_endpoint_descriptor *desc, char *buf)
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{
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char *direction;
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if ((desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
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USB_ENDPOINT_XFER_CONTROL)
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direction = "both";
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else if (desc->bEndpointAddress & USB_DIR_IN)
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direction = "in";
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else
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direction = "out";
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return sprintf(buf, "%s\n", direction);
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}
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static EP_ATTR(direction);
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static struct attribute *ep_attrs[] = {
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&ep_bLength.attr,
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&ep_bEndpointAddress.attr,
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&ep_bmAttributes.attr,
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&ep_bInterval.attr,
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&ep_wMaxPacketSize.attr,
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&ep_type.attr,
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&ep_interval.attr,
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&ep_direction.attr,
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NULL,
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};
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static void ep_object_release(struct kobject *kobj)
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{
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kfree(to_ep_object(kobj));
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}
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static ssize_t ep_object_show(struct kobject *kobj, struct attribute *attr,
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char *buf)
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{
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struct ep_object *ep_obj = to_ep_object(kobj);
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struct ep_attribute *ep_attr = to_ep_attribute(attr);
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return (ep_attr->show)(ep_obj->udev, ep_obj->desc, buf);
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}
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static struct sysfs_ops ep_object_sysfs_ops = {
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.show = ep_object_show,
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};
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static struct kobj_type ep_object_ktype = {
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.release = ep_object_release,
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.sysfs_ops = &ep_object_sysfs_ops,
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.default_attrs = ep_attrs,
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};
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2006-06-14 13:14:34 -06:00
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void usb_create_ep_files(struct device *parent,
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2006-06-14 13:14:34 -06:00
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struct usb_host_endpoint *endpoint,
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struct usb_device *udev)
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{
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struct ep_object *ep_obj;
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struct kobject *kobj;
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ep_obj = kzalloc(sizeof(struct ep_object), GFP_KERNEL);
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if (!ep_obj)
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return;
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ep_obj->desc = &endpoint->desc;
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ep_obj->udev = udev;
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kobj = &ep_obj->kobj;
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kobject_set_name(kobj, "ep_%02x", endpoint->desc.bEndpointAddress);
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2006-06-14 13:14:34 -06:00
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kobj->parent = &parent->kobj;
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2006-06-14 13:14:34 -06:00
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kobj->ktype = &ep_object_ktype;
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/* Don't use kobject_register, because it generates a hotplug event */
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kobject_init(kobj);
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if (kobject_add(kobj) == 0)
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endpoint->kobj = kobj;
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else
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kobject_put(kobj);
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}
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void usb_remove_ep_files(struct usb_host_endpoint *endpoint)
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{
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if (endpoint->kobj) {
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kobject_del(endpoint->kobj);
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kobject_put(endpoint->kobj);
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endpoint->kobj = NULL;
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}
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}
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