Merge branch 'master' into for-next
[linux-2.6.git] / 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
31 static 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 }
56 static DEVICE_ATTR(wusb_disconnect, 0200, NULL, wusb_disconnect_store);
57
58 static 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 }
72 static DEVICE_ATTR(wusb_cdid, 0444, wusb_cdid_show, NULL);
73
74 static 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 }
108 static DEVICE_ATTR(wusb_ck, 0200, NULL, wusb_ck_store);
109
110 static 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
117 static struct attribute_group wusb_dev_attr_group = {
118         .name = NULL,   /* we want them in the same directory */
119         .attrs = wusb_dev_attrs,
120 };
121
122 int 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
134 void 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 }