tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
35static 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}
60static DEVICE_ATTR(wusb_disconnect, 0200, NULL, wusb_disconnect_store);
61
62static 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}
76static DEVICE_ATTR(wusb_cdid, 0444, wusb_cdid_show, NULL);
77
78static 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}
112static DEVICE_ATTR(wusb_ck, 0200, NULL, wusb_ck_store);
113
114static 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
121static struct attribute_group wusb_dev_attr_group = {
122 .name = NULL, /* we want them in the same directory */
123 .attrs = wusb_dev_attrs,
124};
125
126int 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
138void 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}