--- /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/usb.h>
+#include "usb.h"
+
+/* endpoint stuff */
+
+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",
+ le16_to_cpu(ep->desc->wMaxPacketSize) & 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 (ep->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 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 (ep->desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
+ 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 ((ep->desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
+ USB_ENDPOINT_XFER_CONTROL)
+ direction = "both";
+ else if (ep->desc->bEndpointAddress & USB_DIR_IN)
+ 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 struct endpoint_class {
+ struct kref kref;
+ struct class *class;
+} *ep_class;
+
+static int init_endpoint_class(void)
+{
+ int result = 0;
+
+ if (ep_class != NULL) {
+ kref_get(&ep_class->kref);
+ goto exit;
+ }
+
+ ep_class = kmalloc(sizeof(*ep_class), GFP_KERNEL);
+ if (!ep_class) {
+ result = -ENOMEM;
+ goto exit;
+ }
+
+ kref_init(&ep_class->kref);
+ ep_class->class = class_create(THIS_MODULE, "usb_endpoint");
+ if (IS_ERR(ep_class->class)) {
+ result = IS_ERR(ep_class->class);
+ kfree(ep_class);
+ ep_class = NULL;
+ goto exit;
+ }
+
+exit:
+ return result;
+}
+
+static void release_endpoint_class(struct kref *kref)
+{
+ /* Ok, we cheat as we know we only have one ep_class */
+ class_destroy(ep_class->class);
+ kfree(ep_class);
+ ep_class = NULL;
+}
+
+static void destroy_endpoint_class(void)
+{
+ if (ep_class)
+ kref_put(&ep_class->kref, release_endpoint_class);
+}
+
+static void ep_device_release(struct device *dev)
+{
+ struct ep_device *ep_dev = to_ep_device(dev);
+
+ dev_dbg(dev, "%s called for %s\n", __FUNCTION__, dev->bus_id);
+ kfree(ep_dev);
+}
+
+void usb_create_ep_files(struct device *parent,
+ struct usb_host_endpoint *endpoint,
+ struct usb_device *udev)
+{
+ char name[8];
+ struct ep_device *ep_dev;
+ int minor;
+ int retval;
+
+ retval = init_endpoint_class();
+ if (retval)
+ goto exit;
+
+ ep_dev = kzalloc(sizeof(*ep_dev), GFP_KERNEL);
+ if (!ep_dev) {
+ retval = -ENOMEM;
+ goto exit;
+ }
+
+ /* fun calculation to determine the minor of this endpoint */
+ minor = (((udev->bus->busnum - 1) * 128) * 16) + (udev->devnum - 1);
+
+ ep_dev->desc = &endpoint->desc;
+ ep_dev->udev = udev;
+ ep_dev->dev.devt = MKDEV(442, minor); // FIXME fake number...
+ ep_dev->dev.class = ep_class->class;
+ ep_dev->dev.parent = parent;
+ ep_dev->dev.release = ep_device_release;
+ snprintf(ep_dev->dev.bus_id, BUS_ID_SIZE, "usbdev%d.%d_ep%02x",
+ udev->bus->busnum, udev->devnum,
+ endpoint->desc.bEndpointAddress);
+
+ retval = device_register(&ep_dev->dev);
+ if (retval)
+ goto error;
+ sysfs_create_group(&ep_dev->dev.kobj, &ep_dev_attr_grp);
+
+ endpoint->ep_dev = ep_dev;
+
+ /* create the symlink to the old-style "ep_XX" directory */
+ sprintf(name, "ep_%02x", endpoint->desc.bEndpointAddress);
+ sysfs_create_link(&parent->kobj, &endpoint->ep_dev->dev.kobj, name);
+
+exit:
+ return;
+error:
+ kfree(ep_dev);
+ return;
+}
+
+void usb_remove_ep_files(struct usb_host_endpoint *endpoint)
+{
+
+ if (endpoint->ep_dev) {
+ char name[8];
+
+ sprintf(name, "ep_%02x", endpoint->desc.bEndpointAddress);
+ sysfs_remove_link(&endpoint->ep_dev->dev.parent->kobj, name);
+ sysfs_remove_group(&endpoint->ep_dev->dev.kobj, &ep_dev_attr_grp);
+ device_unregister(&endpoint->ep_dev->dev);
+ endpoint->ep_dev = NULL;
+ }
+ destroy_endpoint_class();
+}
+
+
git://git.onelab.eu / linux-2.6.git / blobdiff