--- /dev/null
+/*
+ * 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/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 field##_show(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_RO(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 wMaxPacketSize_show(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_RO(wMaxPacketSize);
+
+static ssize_t type_show(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_RO(type);
+
+static ssize_t interval_show(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_RO(interval);
+
+static ssize_t direction_show(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_RO(direction);
+
+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;
+ }
+}
Code Review / kvmfornfv.git / blobdiff