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