Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 218 insertions, 0 deletions

diff --git a/drivers/usb/core/endpoint.c b/drivers/usb/core/endpoint.c
new file mode 100644
index 000000000..1c2c04079
--- /dev/null
+++ b/drivers/usb/core/endpoint.c
@@ -0,0 +1,218 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * drivers/usb/core/endpoint.c
+ *
+ * (C) Copyright 2002,2004,2006 Greg Kroah-Hartman
+ * (C) Copyright 2002,2004 IBM Corp.
+ * (C) Copyright 2006 Novell Inc.
+ *
+ * Released under the GPLv2 only.
+ *
+ * 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));
+}
+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;
+	}
+}