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1/*
2 * Ultra Wide Band
3 * Driver initialization, etc
4 *
5 * Copyright (C) 2005-2006 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 * FIXME: docs
24 *
25 * Life cycle: FIXME: explain
26 *
27 * UWB radio controller:
28 *
29 * 1. alloc a uwb_rc, zero it
30 * 2. call uwb_rc_init() on it to set it up + ops (won't do any
31 * kind of allocation)
32 * 3. register (now it is owned by the UWB stack--deregister before
33 * freeing/destroying).
34 * 4. It lives on it's own now (UWB stack handles)--when it
35 * disconnects, call unregister()
36 * 5. free it.
37 *
38 * Make sure you have a reference to the uwb_rc before calling
39 * any of the UWB API functions.
40 *
41 * TODO:
42 *
43 * 1. Locking and life cycle management is crappy still. All entry
44 * points to the UWB HCD API assume you have a reference on the
45 * uwb_rc structure and that it won't go away. They mutex lock it
46 * before doing anything.
47 */
48
49#include <linux/kernel.h>
50#include <linux/init.h>
51#include <linux/module.h>
52#include <linux/device.h>
53#include <linux/err.h>
54#include <linux/kdev_t.h>
55#include <linux/random.h>
56
57#include "uwb-internal.h"
58
59
60/* UWB stack attributes (or 'global' constants) */
61
62
63/**
64 * If a beacon disappears for longer than this, then we consider the
65 * device who was represented by that beacon to be gone.
66 *
67 * ECMA-368[17.2.3, last para] establishes that a device must not
68 * consider a device to be its neighbour if he doesn't receive a beacon
69 * for more than mMaxLostBeacons. mMaxLostBeacons is defined in
70 * ECMA-368[17.16] as 3; because we can get only one beacon per
71 * superframe, that'd be 3 * 65ms = 195 ~ 200 ms. Let's give it time
72 * for jitter and stuff and make it 500 ms.
73 */
74unsigned long beacon_timeout_ms = 500;
75
76static
77ssize_t beacon_timeout_ms_show(struct class *class,
78 struct class_attribute *attr,
79 char *buf)
80{
81 return scnprintf(buf, PAGE_SIZE, "%lu\n", beacon_timeout_ms);
82}
83
84static
85ssize_t beacon_timeout_ms_store(struct class *class,
86 struct class_attribute *attr,
87 const char *buf, size_t size)
88{
89 unsigned long bt;
90 ssize_t result;
91 result = sscanf(buf, "%lu", &bt);
92 if (result != 1)
93 return -EINVAL;
94 beacon_timeout_ms = bt;
95 return size;
96}
97
98static struct class_attribute uwb_class_attrs[] = {
99 __ATTR(beacon_timeout_ms, S_IWUSR | S_IRUGO,
100 beacon_timeout_ms_show, beacon_timeout_ms_store),
101 __ATTR_NULL,
102};
103
104/** Device model classes */
105struct class uwb_rc_class = {
106 .name = "uwb_rc",
107 .class_attrs = uwb_class_attrs,
108};
109
110
111static int __init uwb_subsys_init(void)
112{
113 int result = 0;
114
115 result = uwb_est_create();
116 if (result < 0) {
117 printk(KERN_ERR "uwb: Can't initialize EST subsystem\n");
118 goto error_est_init;
119 }
120
121 result = class_register(&uwb_rc_class);
122 if (result < 0)
123 goto error_uwb_rc_class_register;
124 uwb_dbg_init();
125 return 0;
126
127error_uwb_rc_class_register:
128 uwb_est_destroy();
129error_est_init:
130 return result;
131}
132module_init(uwb_subsys_init);
133
134static void __exit uwb_subsys_exit(void)
135{
136 uwb_dbg_exit();
137 class_unregister(&uwb_rc_class);
138 uwb_est_destroy();
139 return;
140}
141module_exit(uwb_subsys_exit);
142
143MODULE_AUTHOR("Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>");
144MODULE_DESCRIPTION("Ultra Wide Band core");
145MODULE_LICENSE("GPL");
1/*
2 * Ultra Wide Band
3 * Driver initialization, etc
4 *
5 * Copyright (C) 2005-2006 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 * FIXME: docs
24 *
25 * Life cycle: FIXME: explain
26 *
27 * UWB radio controller:
28 *
29 * 1. alloc a uwb_rc, zero it
30 * 2. call uwb_rc_init() on it to set it up + ops (won't do any
31 * kind of allocation)
32 * 3. register (now it is owned by the UWB stack--deregister before
33 * freeing/destroying).
34 * 4. It lives on it's own now (UWB stack handles)--when it
35 * disconnects, call unregister()
36 * 5. free it.
37 *
38 * Make sure you have a reference to the uwb_rc before calling
39 * any of the UWB API functions.
40 *
41 * TODO:
42 *
43 * 1. Locking and life cycle management is crappy still. All entry
44 * points to the UWB HCD API assume you have a reference on the
45 * uwb_rc structure and that it won't go away. They mutex lock it
46 * before doing anything.
47 */
48
49#include <linux/kernel.h>
50#include <linux/init.h>
51#include <linux/module.h>
52#include <linux/device.h>
53#include <linux/err.h>
54#include <linux/kdev_t.h>
55#include <linux/random.h>
56
57#include "uwb-internal.h"
58
59
60/* UWB stack attributes (or 'global' constants) */
61
62
63/**
64 * If a beacon disappears for longer than this, then we consider the
65 * device who was represented by that beacon to be gone.
66 *
67 * ECMA-368[17.2.3, last para] establishes that a device must not
68 * consider a device to be its neighbour if he doesn't receive a beacon
69 * for more than mMaxLostBeacons. mMaxLostBeacons is defined in
70 * ECMA-368[17.16] as 3; because we can get only one beacon per
71 * superframe, that'd be 3 * 65ms = 195 ~ 200 ms. Let's give it time
72 * for jitter and stuff and make it 500 ms.
73 */
74unsigned long beacon_timeout_ms = 500;
75
76static
77ssize_t beacon_timeout_ms_show(struct class *class,
78 struct class_attribute *attr,
79 char *buf)
80{
81 return scnprintf(buf, PAGE_SIZE, "%lu\n", beacon_timeout_ms);
82}
83
84static
85ssize_t beacon_timeout_ms_store(struct class *class,
86 struct class_attribute *attr,
87 const char *buf, size_t size)
88{
89 unsigned long bt;
90 ssize_t result;
91 result = sscanf(buf, "%lu", &bt);
92 if (result != 1)
93 return -EINVAL;
94 beacon_timeout_ms = bt;
95 return size;
96}
97
98static struct class_attribute uwb_class_attrs[] = {
99 __ATTR(beacon_timeout_ms, S_IWUSR | S_IRUGO,
100 beacon_timeout_ms_show, beacon_timeout_ms_store),
101 __ATTR_NULL,
102};
103
104/** Device model classes */
105struct class uwb_rc_class = {
106 .name = "uwb_rc",
107 .class_attrs = uwb_class_attrs,
108};
109
110
111static int __init uwb_subsys_init(void)
112{
113 int result = 0;
114
115 result = uwb_est_create();
116 if (result < 0) {
117 printk(KERN_ERR "uwb: Can't initialize EST subsystem\n");
118 goto error_est_init;
119 }
120
121 result = class_register(&uwb_rc_class);
122 if (result < 0)
123 goto error_uwb_rc_class_register;
124 uwb_dbg_init();
125 return 0;
126
127error_uwb_rc_class_register:
128 uwb_est_destroy();
129error_est_init:
130 return result;
131}
132module_init(uwb_subsys_init);
133
134static void __exit uwb_subsys_exit(void)
135{
136 uwb_dbg_exit();
137 class_unregister(&uwb_rc_class);
138 uwb_est_destroy();
139 return;
140}
141module_exit(uwb_subsys_exit);
142
143MODULE_AUTHOR("Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>");
144MODULE_DESCRIPTION("Ultra Wide Band core");
145MODULE_LICENSE("GPL");