mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 22:40:53 +07:00
1b21d5e166
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
290 lines
6.8 KiB
C
290 lines
6.8 KiB
C
/*
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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_device {
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struct usb_endpoint_descriptor *desc;
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struct usb_device *udev;
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struct device dev;
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};
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#define to_ep_device(_dev) \
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container_of(_dev, struct ep_device, dev)
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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 usb_ep_attr(field, format_string) \
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static ssize_t show_ep_##field(struct device *dev, \
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struct device_attribute *attr, \
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char *buf) \
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{ \
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struct ep_device *ep = to_ep_device(dev); \
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return sprintf(buf, format_string, ep->desc->field); \
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} \
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static DEVICE_ATTR(field, S_IRUGO, show_ep_##field, NULL);
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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 device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct ep_device *ep = to_ep_device(dev);
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return sprintf(buf, "%04x\n",
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le16_to_cpu(ep->desc->wMaxPacketSize) & 0x07ff);
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}
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static DEVICE_ATTR(wMaxPacketSize, S_IRUGO, show_ep_wMaxPacketSize, NULL);
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static ssize_t show_ep_type(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct ep_device *ep = to_ep_device(dev);
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char *type = "unknown";
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switch (ep->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 DEVICE_ATTR(type, S_IRUGO, show_ep_type, NULL);
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static ssize_t show_ep_interval(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct ep_device *ep = to_ep_device(dev);
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char unit;
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unsigned interval = 0;
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unsigned in;
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in = (ep->desc->bEndpointAddress & USB_DIR_IN);
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switch (ep->desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
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case USB_ENDPOINT_XFER_CONTROL:
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if (ep->udev->speed == USB_SPEED_HIGH) /* uframes per NAK */
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interval = ep->desc->bInterval;
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break;
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case USB_ENDPOINT_XFER_ISOC:
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interval = 1 << (ep->desc->bInterval - 1);
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break;
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case USB_ENDPOINT_XFER_BULK:
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if (ep->udev->speed == USB_SPEED_HIGH && !in) /* uframes per NAK */
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interval = ep->desc->bInterval;
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break;
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case USB_ENDPOINT_XFER_INT:
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if (ep->udev->speed == USB_SPEED_HIGH)
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interval = 1 << (ep->desc->bInterval - 1);
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else
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interval = ep->desc->bInterval;
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break;
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}
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interval *= (ep->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 DEVICE_ATTR(interval, S_IRUGO, show_ep_interval, NULL);
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static ssize_t show_ep_direction(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct ep_device *ep = to_ep_device(dev);
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char *direction;
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if ((ep->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 (ep->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 DEVICE_ATTR(direction, S_IRUGO, show_ep_direction, NULL);
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static struct attribute *ep_dev_attrs[] = {
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&dev_attr_bLength.attr,
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&dev_attr_bEndpointAddress.attr,
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&dev_attr_bmAttributes.attr,
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&dev_attr_bInterval.attr,
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&dev_attr_wMaxPacketSize.attr,
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&dev_attr_interval.attr,
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&dev_attr_type.attr,
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&dev_attr_direction.attr,
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NULL,
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};
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static struct attribute_group ep_dev_attr_grp = {
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.attrs = ep_dev_attrs,
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};
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static struct endpoint_class {
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struct kref kref;
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struct class *class;
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} *ep_class;
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static int init_endpoint_class(void)
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{
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int result = 0;
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if (ep_class != NULL) {
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kref_get(&ep_class->kref);
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goto exit;
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}
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ep_class = kmalloc(sizeof(*ep_class), GFP_KERNEL);
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if (!ep_class) {
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result = -ENOMEM;
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goto exit;
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}
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kref_init(&ep_class->kref);
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ep_class->class = class_create(THIS_MODULE, "usb_endpoint");
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if (IS_ERR(ep_class->class)) {
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result = IS_ERR(ep_class->class);
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kfree(ep_class);
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ep_class = NULL;
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goto exit;
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}
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exit:
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return result;
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}
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static void release_endpoint_class(struct kref *kref)
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{
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/* Ok, we cheat as we know we only have one ep_class */
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class_destroy(ep_class->class);
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kfree(ep_class);
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ep_class = NULL;
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}
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static void destroy_endpoint_class(void)
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{
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if (ep_class)
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kref_put(&ep_class->kref, release_endpoint_class);
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}
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static void ep_device_release(struct device *dev)
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{
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struct ep_device *ep_dev = to_ep_device(dev);
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dev_dbg(dev, "%s called for %s\n", __FUNCTION__, dev->bus_id);
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kfree(ep_dev);
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}
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int usb_create_ep_files(struct device *parent,
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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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char name[8];
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struct ep_device *ep_dev;
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int minor;
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int retval;
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retval = init_endpoint_class();
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if (retval)
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goto exit;
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ep_dev = kzalloc(sizeof(*ep_dev), GFP_KERNEL);
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if (!ep_dev) {
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retval = -ENOMEM;
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goto exit;
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}
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/* fun calculation to determine the minor of this endpoint */
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minor = (((udev->bus->busnum - 1) * 128) * 16) + (udev->devnum - 1);
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ep_dev->desc = &endpoint->desc;
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ep_dev->udev = udev;
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ep_dev->dev.devt = MKDEV(442, minor); // FIXME fake number...
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ep_dev->dev.class = ep_class->class;
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ep_dev->dev.parent = parent;
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ep_dev->dev.release = ep_device_release;
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snprintf(ep_dev->dev.bus_id, BUS_ID_SIZE, "usbdev%d.%d_ep%02x",
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udev->bus->busnum, udev->devnum,
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endpoint->desc.bEndpointAddress);
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retval = device_register(&ep_dev->dev);
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if (retval)
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goto error;
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retval = sysfs_create_group(&ep_dev->dev.kobj, &ep_dev_attr_grp);
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if (retval)
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goto error_group;
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endpoint->ep_dev = ep_dev;
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/* create the symlink to the old-style "ep_XX" directory */
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sprintf(name, "ep_%02x", endpoint->desc.bEndpointAddress);
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retval = sysfs_create_link(&parent->kobj,
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&endpoint->ep_dev->dev.kobj, name);
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if (retval)
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goto error_link;
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exit:
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return retval;
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error_link:
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sysfs_remove_group(&ep_dev->dev.kobj, &ep_dev_attr_grp);
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error_group:
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device_unregister(&ep_dev->dev);
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endpoint->ep_dev = NULL;
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destroy_endpoint_class();
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return retval;
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error:
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kfree(ep_dev);
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destroy_endpoint_class();
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return retval;
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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->ep_dev) {
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char name[8];
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sprintf(name, "ep_%02x", endpoint->desc.bEndpointAddress);
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sysfs_remove_link(&endpoint->ep_dev->dev.parent->kobj, name);
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sysfs_remove_group(&endpoint->ep_dev->dev.kobj, &ep_dev_attr_grp);
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device_unregister(&endpoint->ep_dev->dev);
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endpoint->ep_dev = NULL;
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}
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destroy_endpoint_class();
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}
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