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// 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);
}
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