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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}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * WUSB devices
4 * sysfs bindings
5 *
6 * Copyright (C) 2007 Intel Corporation
7 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
8 *
9 * Get them out of the way...
10 */
11
12#include <linux/jiffies.h>
13#include <linux/ctype.h>
14#include <linux/workqueue.h>
15#include "wusbhc.h"
16
17static ssize_t wusb_disconnect_store(struct device *dev,
18 struct device_attribute *attr,
19 const char *buf, size_t size)
20{
21 struct usb_device *usb_dev;
22 struct wusbhc *wusbhc;
23 unsigned command;
24 u8 port_idx;
25
26 if (sscanf(buf, "%u", &command) != 1)
27 return -EINVAL;
28 if (command == 0)
29 return size;
30 usb_dev = to_usb_device(dev);
31 wusbhc = wusbhc_get_by_usb_dev(usb_dev);
32 if (wusbhc == NULL)
33 return -ENODEV;
34
35 mutex_lock(&wusbhc->mutex);
36 port_idx = wusb_port_no_to_idx(usb_dev->portnum);
37 __wusbhc_dev_disable(wusbhc, port_idx);
38 mutex_unlock(&wusbhc->mutex);
39 wusbhc_put(wusbhc);
40 return size;
41}
42static DEVICE_ATTR_WO(wusb_disconnect);
43
44static ssize_t wusb_cdid_show(struct device *dev,
45 struct device_attribute *attr, char *buf)
46{
47 ssize_t result;
48 struct wusb_dev *wusb_dev;
49
50 wusb_dev = wusb_dev_get_by_usb_dev(to_usb_device(dev));
51 if (wusb_dev == NULL)
52 return -ENODEV;
53 result = ckhdid_printf(buf, PAGE_SIZE, &wusb_dev->cdid);
54 strcat(buf, "\n");
55 wusb_dev_put(wusb_dev);
56 return result + 1;
57}
58static DEVICE_ATTR_RO(wusb_cdid);
59
60static ssize_t wusb_ck_store(struct device *dev,
61 struct device_attribute *attr,
62 const char *buf, size_t size)
63{
64 int result;
65 struct usb_device *usb_dev;
66 struct wusbhc *wusbhc;
67 struct wusb_ckhdid ck;
68
69 result = sscanf(buf,
70 "%02hhx %02hhx %02hhx %02hhx "
71 "%02hhx %02hhx %02hhx %02hhx "
72 "%02hhx %02hhx %02hhx %02hhx "
73 "%02hhx %02hhx %02hhx %02hhx\n",
74 &ck.data[0] , &ck.data[1],
75 &ck.data[2] , &ck.data[3],
76 &ck.data[4] , &ck.data[5],
77 &ck.data[6] , &ck.data[7],
78 &ck.data[8] , &ck.data[9],
79 &ck.data[10], &ck.data[11],
80 &ck.data[12], &ck.data[13],
81 &ck.data[14], &ck.data[15]);
82 if (result != 16)
83 return -EINVAL;
84
85 usb_dev = to_usb_device(dev);
86 wusbhc = wusbhc_get_by_usb_dev(usb_dev);
87 if (wusbhc == NULL)
88 return -ENODEV;
89 result = wusb_dev_4way_handshake(wusbhc, usb_dev->wusb_dev, &ck);
90 memzero_explicit(&ck, sizeof(ck));
91 wusbhc_put(wusbhc);
92 return result < 0 ? result : size;
93}
94static DEVICE_ATTR_WO(wusb_ck);
95
96static struct attribute *wusb_dev_attrs[] = {
97 &dev_attr_wusb_disconnect.attr,
98 &dev_attr_wusb_cdid.attr,
99 &dev_attr_wusb_ck.attr,
100 NULL,
101};
102
103static const struct attribute_group wusb_dev_attr_group = {
104 .name = NULL, /* we want them in the same directory */
105 .attrs = wusb_dev_attrs,
106};
107
108int wusb_dev_sysfs_add(struct wusbhc *wusbhc, struct usb_device *usb_dev,
109 struct wusb_dev *wusb_dev)
110{
111 int result = sysfs_create_group(&usb_dev->dev.kobj,
112 &wusb_dev_attr_group);
113 struct device *dev = &usb_dev->dev;
114 if (result < 0)
115 dev_err(dev, "Cannot register WUSB-dev attributes: %d\n",
116 result);
117 return result;
118}
119
120void wusb_dev_sysfs_rm(struct wusb_dev *wusb_dev)
121{
122 struct usb_device *usb_dev = wusb_dev->usb_dev;
123 if (usb_dev)
124 sysfs_remove_group(&usb_dev->dev.kobj, &wusb_dev_attr_group);
125}