mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
898eb71cb1
Found these while looking at printk uses. Add missing newlines to dev_<level> uses Add missing KERN_<level> prefixes to multiline dev_<level>s Fixed a wierd->weird spelling typo Added a newline to a printk Signed-off-by: Joe Perches <joe@perches.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Mark M. Hoffman <mhoffman@lightlink.com> Cc: Roland Dreier <rolandd@cisco.com> Cc: Tilman Schmidt <tilman@imap.cc> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Jeff Garzik <jeff@garzik.org> Cc: Stephen Hemminger <shemminger@linux-foundation.org> Cc: Greg KH <greg@kroah.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Cc: James Smart <James.Smart@Emulex.Com> Cc: Andrew Vasquez <andrew.vasquez@qlogic.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Jaroslav Kysela <perex@suse.cz> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
357 lines
8.2 KiB
C
357 lines
8.2 KiB
C
/*
|
|
* 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/idr.h>
|
|
#include <linux/usb.h>
|
|
#include "usb.h"
|
|
|
|
#define MAX_ENDPOINT_MINORS (64*128*32)
|
|
static int usb_endpoint_major;
|
|
static DEFINE_IDR(endpoint_idr);
|
|
|
|
struct ep_device {
|
|
struct usb_endpoint_descriptor *desc;
|
|
struct usb_device *udev;
|
|
struct device dev;
|
|
int minor;
|
|
};
|
|
#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 int usb_endpoint_major_init(void)
|
|
{
|
|
dev_t dev;
|
|
int error;
|
|
|
|
error = alloc_chrdev_region(&dev, 0, MAX_ENDPOINT_MINORS,
|
|
"usb_endpoint");
|
|
if (error) {
|
|
err("unable to get a dynamic major for usb endpoints");
|
|
return error;
|
|
}
|
|
usb_endpoint_major = MAJOR(dev);
|
|
|
|
return error;
|
|
}
|
|
|
|
static void usb_endpoint_major_cleanup(void)
|
|
{
|
|
unregister_chrdev_region(MKDEV(usb_endpoint_major, 0),
|
|
MAX_ENDPOINT_MINORS);
|
|
}
|
|
|
|
static int endpoint_get_minor(struct ep_device *ep_dev)
|
|
{
|
|
static DEFINE_MUTEX(minor_lock);
|
|
int retval = -ENOMEM;
|
|
int id;
|
|
|
|
mutex_lock(&minor_lock);
|
|
if (idr_pre_get(&endpoint_idr, GFP_KERNEL) == 0)
|
|
goto exit;
|
|
|
|
retval = idr_get_new(&endpoint_idr, ep_dev, &id);
|
|
if (retval < 0) {
|
|
if (retval == -EAGAIN)
|
|
retval = -ENOMEM;
|
|
goto exit;
|
|
}
|
|
ep_dev->minor = id & MAX_ID_MASK;
|
|
exit:
|
|
mutex_unlock(&minor_lock);
|
|
return retval;
|
|
}
|
|
|
|
static void endpoint_free_minor(struct ep_device *ep_dev)
|
|
{
|
|
idr_remove(&endpoint_idr, ep_dev->minor);
|
|
}
|
|
|
|
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 = PTR_ERR(ep_class->class);
|
|
goto class_create_error;
|
|
}
|
|
|
|
result = usb_endpoint_major_init();
|
|
if (result)
|
|
goto endpoint_major_error;
|
|
|
|
goto exit;
|
|
|
|
endpoint_major_error:
|
|
class_destroy(ep_class->class);
|
|
class_create_error:
|
|
kfree(ep_class);
|
|
ep_class = NULL;
|
|
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;
|
|
usb_endpoint_major_cleanup();
|
|
}
|
|
|
|
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);
|
|
|
|
endpoint_free_minor(ep_dev);
|
|
kfree(ep_dev);
|
|
}
|
|
|
|
int 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 retval;
|
|
|
|
retval = init_endpoint_class();
|
|
if (retval)
|
|
goto exit;
|
|
|
|
ep_dev = kzalloc(sizeof(*ep_dev), GFP_KERNEL);
|
|
if (!ep_dev) {
|
|
retval = -ENOMEM;
|
|
goto error_alloc;
|
|
}
|
|
|
|
retval = endpoint_get_minor(ep_dev);
|
|
if (retval) {
|
|
dev_err(parent, "can not allocate minor number for %s\n",
|
|
ep_dev->dev.bus_id);
|
|
goto error_register;
|
|
}
|
|
|
|
ep_dev->desc = &endpoint->desc;
|
|
ep_dev->udev = udev;
|
|
ep_dev->dev.devt = MKDEV(usb_endpoint_major, ep_dev->minor);
|
|
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_chrdev;
|
|
retval = sysfs_create_group(&ep_dev->dev.kobj, &ep_dev_attr_grp);
|
|
if (retval)
|
|
goto error_group;
|
|
|
|
/* create the symlink to the old-style "ep_XX" directory */
|
|
sprintf(name, "ep_%02x", endpoint->desc.bEndpointAddress);
|
|
retval = sysfs_create_link(&parent->kobj, &ep_dev->dev.kobj, name);
|
|
if (retval)
|
|
goto error_link;
|
|
endpoint->ep_dev = ep_dev;
|
|
return retval;
|
|
|
|
error_link:
|
|
sysfs_remove_group(&ep_dev->dev.kobj, &ep_dev_attr_grp);
|
|
error_group:
|
|
device_unregister(&ep_dev->dev);
|
|
destroy_endpoint_class();
|
|
return retval;
|
|
|
|
error_chrdev:
|
|
endpoint_free_minor(ep_dev);
|
|
|
|
error_register:
|
|
kfree(ep_dev);
|
|
error_alloc:
|
|
destroy_endpoint_class();
|
|
exit:
|
|
return retval;
|
|
}
|
|
|
|
void usb_remove_ep_files(struct usb_host_endpoint *endpoint)
|
|
{
|
|
struct ep_device *ep_dev = endpoint->ep_dev;
|
|
|
|
if (ep_dev) {
|
|
char name[8];
|
|
|
|
sprintf(name, "ep_%02x", endpoint->desc.bEndpointAddress);
|
|
sysfs_remove_link(&ep_dev->dev.parent->kobj, name);
|
|
sysfs_remove_group(&ep_dev->dev.kobj, &ep_dev_attr_grp);
|
|
device_unregister(&ep_dev->dev);
|
|
endpoint->ep_dev = NULL;
|
|
destroy_endpoint_class();
|
|
}
|
|
}
|