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060b694929
Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Felipe Balbi <felipe.balbi@linux.intel.com> Cc: Johan Hovold <johan@kernel.org> Cc: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 = ckhdid_printf(buf, PAGE_SIZE, &wusb_dev->cdid);
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strcat(buf, "\n");
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wusb_dev_put(wusb_dev);
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return result + 1;
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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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