126 lines
3.1 KiB
C
126 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* WUSB devices
|
|
* sysfs bindings
|
|
*
|
|
* Copyright (C) 2007 Intel Corporation
|
|
* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
|
|
*
|
|
* Get them out of the way...
|
|
*/
|
|
|
|
#include <linux/jiffies.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/workqueue.h>
|
|
#include "wusbhc.h"
|
|
|
|
static ssize_t wusb_disconnect_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t size)
|
|
{
|
|
struct usb_device *usb_dev;
|
|
struct wusbhc *wusbhc;
|
|
unsigned command;
|
|
u8 port_idx;
|
|
|
|
if (sscanf(buf, "%u", &command) != 1)
|
|
return -EINVAL;
|
|
if (command == 0)
|
|
return size;
|
|
usb_dev = to_usb_device(dev);
|
|
wusbhc = wusbhc_get_by_usb_dev(usb_dev);
|
|
if (wusbhc == NULL)
|
|
return -ENODEV;
|
|
|
|
mutex_lock(&wusbhc->mutex);
|
|
port_idx = wusb_port_no_to_idx(usb_dev->portnum);
|
|
__wusbhc_dev_disable(wusbhc, port_idx);
|
|
mutex_unlock(&wusbhc->mutex);
|
|
wusbhc_put(wusbhc);
|
|
return size;
|
|
}
|
|
static DEVICE_ATTR_WO(wusb_disconnect);
|
|
|
|
static ssize_t wusb_cdid_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
ssize_t result;
|
|
struct wusb_dev *wusb_dev;
|
|
|
|
wusb_dev = wusb_dev_get_by_usb_dev(to_usb_device(dev));
|
|
if (wusb_dev == NULL)
|
|
return -ENODEV;
|
|
result = ckhdid_printf(buf, PAGE_SIZE, &wusb_dev->cdid);
|
|
strcat(buf, "\n");
|
|
wusb_dev_put(wusb_dev);
|
|
return result + 1;
|
|
}
|
|
static DEVICE_ATTR_RO(wusb_cdid);
|
|
|
|
static ssize_t wusb_ck_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t size)
|
|
{
|
|
int result;
|
|
struct usb_device *usb_dev;
|
|
struct wusbhc *wusbhc;
|
|
struct wusb_ckhdid ck;
|
|
|
|
result = sscanf(buf,
|
|
"%02hhx %02hhx %02hhx %02hhx "
|
|
"%02hhx %02hhx %02hhx %02hhx "
|
|
"%02hhx %02hhx %02hhx %02hhx "
|
|
"%02hhx %02hhx %02hhx %02hhx\n",
|
|
&ck.data[0] , &ck.data[1],
|
|
&ck.data[2] , &ck.data[3],
|
|
&ck.data[4] , &ck.data[5],
|
|
&ck.data[6] , &ck.data[7],
|
|
&ck.data[8] , &ck.data[9],
|
|
&ck.data[10], &ck.data[11],
|
|
&ck.data[12], &ck.data[13],
|
|
&ck.data[14], &ck.data[15]);
|
|
if (result != 16)
|
|
return -EINVAL;
|
|
|
|
usb_dev = to_usb_device(dev);
|
|
wusbhc = wusbhc_get_by_usb_dev(usb_dev);
|
|
if (wusbhc == NULL)
|
|
return -ENODEV;
|
|
result = wusb_dev_4way_handshake(wusbhc, usb_dev->wusb_dev, &ck);
|
|
memzero_explicit(&ck, sizeof(ck));
|
|
wusbhc_put(wusbhc);
|
|
return result < 0 ? result : size;
|
|
}
|
|
static DEVICE_ATTR_WO(wusb_ck);
|
|
|
|
static struct attribute *wusb_dev_attrs[] = {
|
|
&dev_attr_wusb_disconnect.attr,
|
|
&dev_attr_wusb_cdid.attr,
|
|
&dev_attr_wusb_ck.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group wusb_dev_attr_group = {
|
|
.name = NULL, /* we want them in the same directory */
|
|
.attrs = wusb_dev_attrs,
|
|
};
|
|
|
|
int wusb_dev_sysfs_add(struct wusbhc *wusbhc, struct usb_device *usb_dev,
|
|
struct wusb_dev *wusb_dev)
|
|
{
|
|
int result = sysfs_create_group(&usb_dev->dev.kobj,
|
|
&wusb_dev_attr_group);
|
|
struct device *dev = &usb_dev->dev;
|
|
if (result < 0)
|
|
dev_err(dev, "Cannot register WUSB-dev attributes: %d\n",
|
|
result);
|
|
return result;
|
|
}
|
|
|
|
void wusb_dev_sysfs_rm(struct wusb_dev *wusb_dev)
|
|
{
|
|
struct usb_device *usb_dev = wusb_dev->usb_dev;
|
|
if (usb_dev)
|
|
sysfs_remove_group(&usb_dev->dev.kobj, &wusb_dev_attr_group);
|
|
}
|