// 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 = sprintf(buf, "%16ph\n", wusb_dev->cdid.data);	wusb_dev_put(wusb_dev);	return result;}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);}