LXR linux/drivers/usb/wusbcore/dev-sysfs.c

   1/*
   2 * WUSB devices
   3 * sysfs bindings
   4 *
   5 * Copyright (C) 2007 Intel Corporation
   6 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License version
  10 * 2 as published by the Free Software Foundation.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program; if not, write to the Free Software
  19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  20 * 02110-1301, USA.
  21 *
  22 *
  23 * Get them out of the way...
  24 */
  25
  26#include <linux/jiffies.h>
  27#include <linux/ctype.h>
  28#include <linux/workqueue.h>
  29#include "wusbhc.h"
  30
  31static ssize_t wusb_disconnect_store(struct device *dev,
  32                                     struct device_attribute *attr,
  33                                     const char *buf, size_t size)
  34{
  35        struct usb_device *usb_dev;
  36        struct wusbhc *wusbhc;
  37        unsigned command;
  38        u8 port_idx;
  39
  40        if (sscanf(buf, "%u", &command) != 1)
  41                return -EINVAL;
  42        if (command == 0)
  43                return size;
  44        usb_dev = to_usb_device(dev);
  45        wusbhc = wusbhc_get_by_usb_dev(usb_dev);
  46        if (wusbhc == NULL)
  47                return -ENODEV;
  48
  49        mutex_lock(&wusbhc->mutex);
  50        port_idx = wusb_port_no_to_idx(usb_dev->portnum);
  51        __wusbhc_dev_disable(wusbhc, port_idx);
  52        mutex_unlock(&wusbhc->mutex);
  53        wusbhc_put(wusbhc);
  54        return size;
  55}
  56static DEVICE_ATTR(wusb_disconnect, 0200, NULL, wusb_disconnect_store);
  57
  58static ssize_t wusb_cdid_show(struct device *dev,
  59                              struct device_attribute *attr, char *buf)
  60{
  61        ssize_t result;
  62        struct wusb_dev *wusb_dev;
  63
  64        wusb_dev = wusb_dev_get_by_usb_dev(to_usb_device(dev));
  65        if (wusb_dev == NULL)
  66                return -ENODEV;
  67        result = ckhdid_printf(buf, PAGE_SIZE, &wusb_dev->cdid);
  68        strcat(buf, "\n");
  69        wusb_dev_put(wusb_dev);
  70        return result + 1;
  71}
  72static DEVICE_ATTR(wusb_cdid, 0444, wusb_cdid_show, NULL);
  73
  74static ssize_t wusb_ck_store(struct device *dev,
  75                             struct device_attribute *attr,
  76                             const char *buf, size_t size)
  77{
  78        int result;
  79        struct usb_device *usb_dev;
  80        struct wusbhc *wusbhc;
  81        struct wusb_ckhdid ck;
  82
  83        result = sscanf(buf,
  84                        "%02hhx %02hhx %02hhx %02hhx "
  85                        "%02hhx %02hhx %02hhx %02hhx "
  86                        "%02hhx %02hhx %02hhx %02hhx "
  87                        "%02hhx %02hhx %02hhx %02hhx\n",
  88                        &ck.data[0] , &ck.data[1],
  89                        &ck.data[2] , &ck.data[3],
  90                        &ck.data[4] , &ck.data[5],
  91                        &ck.data[6] , &ck.data[7],
  92                        &ck.data[8] , &ck.data[9],
  93                        &ck.data[10], &ck.data[11],
  94                        &ck.data[12], &ck.data[13],
  95                        &ck.data[14], &ck.data[15]);
  96        if (result != 16)
  97                return -EINVAL;
  98
  99        usb_dev = to_usb_device(dev);
 100        wusbhc = wusbhc_get_by_usb_dev(usb_dev);
 101        if (wusbhc == NULL)
 102                return -ENODEV;
 103        result = wusb_dev_4way_handshake(wusbhc, usb_dev->wusb_dev, &ck);
 104        memset(&ck, 0, sizeof(ck));
 105        wusbhc_put(wusbhc);
 106        return result < 0 ? result : size;
 107}
 108static DEVICE_ATTR(wusb_ck, 0200, NULL, wusb_ck_store);
 109
 110static struct attribute *wusb_dev_attrs[] = {
 111                &dev_attr_wusb_disconnect.attr,
 112                &dev_attr_wusb_cdid.attr,
 113                &dev_attr_wusb_ck.attr,
 114                NULL,
 115};
 116
 117static struct attribute_group wusb_dev_attr_group = {
 118        .name = NULL,   /* we want them in the same directory */
 119        .attrs = wusb_dev_attrs,
 120};
 121
 122int wusb_dev_sysfs_add(struct wusbhc *wusbhc, struct usb_device *usb_dev,
 123                       struct wusb_dev *wusb_dev)
 124{
 125        int result = sysfs_create_group(&usb_dev->dev.kobj,
 126                                        &wusb_dev_attr_group);
 127        struct device *dev = &usb_dev->dev;
 128        if (result < 0)
 129                dev_err(dev, "Cannot register WUSB-dev attributes: %d\n",
 130                        result);
 131        return result;
 132}
 133
 134void wusb_dev_sysfs_rm(struct wusb_dev *wusb_dev)
 135{
 136        struct usb_device *usb_dev = wusb_dev->usb_dev;
 137        if (usb_dev)
 138                sysfs_remove_group(&usb_dev->dev.kobj, &wusb_dev_attr_group);
 139}
 140