git.maemo.org Git - kernel-power/blob - usbhost/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
  31 #undef D_LOCAL
  32 #define D_LOCAL 4
  33 #include <linux/uwb/debug.h>
  34
  35 static ssize_t wusb_disconnect_store(struct device *dev,
  36                                      struct device_attribute *attr,
  37                                      const char *buf, size_t size)
  38 {
  39         struct usb_device *usb_dev;
  40         struct wusbhc *wusbhc;
  41         unsigned command;
  42         u8 port_idx;
  43
  44         if (sscanf(buf, "%u", &command) != 1)
  45                 return -EINVAL;
  46         if (command == 0)
  47                 return size;
  48         usb_dev = to_usb_device(dev);
  49         wusbhc = wusbhc_get_by_usb_dev(usb_dev);
  50         if (wusbhc == NULL)
  51                 return -ENODEV;
  52
  53         mutex_lock(&wusbhc->mutex);
  54         port_idx = wusb_port_no_to_idx(usb_dev->portnum);
  55         __wusbhc_dev_disable(wusbhc, port_idx);
  56         mutex_unlock(&wusbhc->mutex);
  57         wusbhc_put(wusbhc);
  58         return size;
  59 }
  60 static DEVICE_ATTR(wusb_disconnect, 0200, NULL, wusb_disconnect_store);
  61
  62 static ssize_t wusb_cdid_show(struct device *dev,
  63                               struct device_attribute *attr, char *buf)
  64 {
  65         ssize_t result;
  66         struct wusb_dev *wusb_dev;
  67
  68         wusb_dev = wusb_dev_get_by_usb_dev(to_usb_device(dev));
  69         if (wusb_dev == NULL)
  70                 return -ENODEV;
  71         result = ckhdid_printf(buf, PAGE_SIZE, &wusb_dev->cdid);
  72         strcat(buf, "\n");
  73         wusb_dev_put(wusb_dev);
  74         return result + 1;
  75 }
  76 static DEVICE_ATTR(wusb_cdid, 0444, wusb_cdid_show, NULL);
  77
  78 static ssize_t wusb_ck_store(struct device *dev,
  79                              struct device_attribute *attr,
  80                              const char *buf, size_t size)
  81 {
  82         int result;
  83         struct usb_device *usb_dev;
  84         struct wusbhc *wusbhc;
  85         struct wusb_ckhdid ck;
  86
  87         result = sscanf(buf,
  88                         "%02hhx %02hhx %02hhx %02hhx "
  89                         "%02hhx %02hhx %02hhx %02hhx "
  90                         "%02hhx %02hhx %02hhx %02hhx "
  91                         "%02hhx %02hhx %02hhx %02hhx\n",
  92                         &ck.data[0] , &ck.data[1],
  93                         &ck.data[2] , &ck.data[3],
  94                         &ck.data[4] , &ck.data[5],
  95                         &ck.data[6] , &ck.data[7],
  96                         &ck.data[8] , &ck.data[9],
  97                         &ck.data[10], &ck.data[11],
  98                         &ck.data[12], &ck.data[13],
  99                         &ck.data[14], &ck.data[15]);
 100         if (result != 16)
 101                 return -EINVAL;
 102
 103         usb_dev = to_usb_device(dev);
 104         wusbhc = wusbhc_get_by_usb_dev(usb_dev);
 105         if (wusbhc == NULL)
 106                 return -ENODEV;
 107         result = wusb_dev_4way_handshake(wusbhc, usb_dev->wusb_dev, &ck);
 108         memset(&ck, 0, sizeof(ck));
 109         wusbhc_put(wusbhc);
 110         return result < 0 ? result : size;
 111 }
 112 static DEVICE_ATTR(wusb_ck, 0200, NULL, wusb_ck_store);
 113
 114 static struct attribute *wusb_dev_attrs[] = {
 115                 &dev_attr_wusb_disconnect.attr,
 116                 &dev_attr_wusb_cdid.attr,
 117                 &dev_attr_wusb_ck.attr,
 118                 NULL,
 119 };
 120
 121 static struct attribute_group wusb_dev_attr_group = {
 122         .name = NULL,   /* we want them in the same directory */
 123         .attrs = wusb_dev_attrs,
 124 };
 125
 126 int wusb_dev_sysfs_add(struct wusbhc *wusbhc, struct usb_device *usb_dev,
 127                        struct wusb_dev *wusb_dev)
 128 {
 129         int result = sysfs_create_group(&usb_dev->dev.kobj,
 130                                         &wusb_dev_attr_group);
 131         struct device *dev = &usb_dev->dev;
 132         if (result < 0)
 133                 dev_err(dev, "Cannot register WUSB-dev attributes: %d\n",
 134                         result);
 135         return result;
 136 }
 137
 138 void wusb_dev_sysfs_rm(struct wusb_dev *wusb_dev)
 139 {
 140         struct usb_device *usb_dev = wusb_dev->usb_dev;
 141         if (usb_dev)
 142                 sysfs_remove_group(&usb_dev->dev.kobj, &wusb_dev_attr_group);
 143 }