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1/*
2 * Loopback IEEE 802.15.4 interface
3 *
4 * Copyright 2007-2012 Siemens AG
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * Written by:
16 * Sergey Lapin <slapin@ossfans.org>
17 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
18 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
19 */
20
21#include <linux/module.h>
22#include <linux/timer.h>
23#include <linux/platform_device.h>
24#include <linux/netdevice.h>
25#include <linux/device.h>
26#include <linux/spinlock.h>
27#include <net/mac802154.h>
28#include <net/cfg802154.h>
29
30static int numlbs = 2;
31
32static LIST_HEAD(fakelb_phys);
33static DEFINE_MUTEX(fakelb_phys_lock);
34
35static LIST_HEAD(fakelb_ifup_phys);
36static DEFINE_RWLOCK(fakelb_ifup_phys_lock);
37
38struct fakelb_phy {
39 struct ieee802154_hw *hw;
40
41 u8 page;
42 u8 channel;
43
44 bool suspended;
45
46 struct list_head list;
47 struct list_head list_ifup;
48};
49
50static int fakelb_hw_ed(struct ieee802154_hw *hw, u8 *level)
51{
52 BUG_ON(!level);
53 *level = 0xbe;
54
55 return 0;
56}
57
58static int fakelb_hw_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
59{
60 struct fakelb_phy *phy = hw->priv;
61
62 write_lock_bh(&fakelb_ifup_phys_lock);
63 phy->page = page;
64 phy->channel = channel;
65 write_unlock_bh(&fakelb_ifup_phys_lock);
66 return 0;
67}
68
69static int fakelb_hw_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
70{
71 struct fakelb_phy *current_phy = hw->priv, *phy;
72
73 read_lock_bh(&fakelb_ifup_phys_lock);
74 WARN_ON(current_phy->suspended);
75 list_for_each_entry(phy, &fakelb_ifup_phys, list_ifup) {
76 if (current_phy == phy)
77 continue;
78
79 if (current_phy->page == phy->page &&
80 current_phy->channel == phy->channel) {
81 struct sk_buff *newskb = pskb_copy(skb, GFP_ATOMIC);
82
83 if (newskb)
84 ieee802154_rx_irqsafe(phy->hw, newskb, 0xcc);
85 }
86 }
87 read_unlock_bh(&fakelb_ifup_phys_lock);
88
89 ieee802154_xmit_complete(hw, skb, false);
90 return 0;
91}
92
93static int fakelb_hw_start(struct ieee802154_hw *hw)
94{
95 struct fakelb_phy *phy = hw->priv;
96
97 write_lock_bh(&fakelb_ifup_phys_lock);
98 phy->suspended = false;
99 list_add(&phy->list_ifup, &fakelb_ifup_phys);
100 write_unlock_bh(&fakelb_ifup_phys_lock);
101
102 return 0;
103}
104
105static void fakelb_hw_stop(struct ieee802154_hw *hw)
106{
107 struct fakelb_phy *phy = hw->priv;
108
109 write_lock_bh(&fakelb_ifup_phys_lock);
110 phy->suspended = true;
111 list_del(&phy->list_ifup);
112 write_unlock_bh(&fakelb_ifup_phys_lock);
113}
114
115static int
116fakelb_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
117{
118 return 0;
119}
120
121static const struct ieee802154_ops fakelb_ops = {
122 .owner = THIS_MODULE,
123 .xmit_async = fakelb_hw_xmit,
124 .ed = fakelb_hw_ed,
125 .set_channel = fakelb_hw_channel,
126 .start = fakelb_hw_start,
127 .stop = fakelb_hw_stop,
128 .set_promiscuous_mode = fakelb_set_promiscuous_mode,
129};
130
131/* Number of dummy devices to be set up by this module. */
132module_param(numlbs, int, 0);
133MODULE_PARM_DESC(numlbs, " number of pseudo devices");
134
135static int fakelb_add_one(struct device *dev)
136{
137 struct ieee802154_hw *hw;
138 struct fakelb_phy *phy;
139 int err;
140
141 hw = ieee802154_alloc_hw(sizeof(*phy), &fakelb_ops);
142 if (!hw)
143 return -ENOMEM;
144
145 phy = hw->priv;
146 phy->hw = hw;
147
148 /* 868 MHz BPSK 802.15.4-2003 */
149 hw->phy->supported.channels[0] |= 1;
150 /* 915 MHz BPSK 802.15.4-2003 */
151 hw->phy->supported.channels[0] |= 0x7fe;
152 /* 2.4 GHz O-QPSK 802.15.4-2003 */
153 hw->phy->supported.channels[0] |= 0x7FFF800;
154 /* 868 MHz ASK 802.15.4-2006 */
155 hw->phy->supported.channels[1] |= 1;
156 /* 915 MHz ASK 802.15.4-2006 */
157 hw->phy->supported.channels[1] |= 0x7fe;
158 /* 868 MHz O-QPSK 802.15.4-2006 */
159 hw->phy->supported.channels[2] |= 1;
160 /* 915 MHz O-QPSK 802.15.4-2006 */
161 hw->phy->supported.channels[2] |= 0x7fe;
162 /* 2.4 GHz CSS 802.15.4a-2007 */
163 hw->phy->supported.channels[3] |= 0x3fff;
164 /* UWB Sub-gigahertz 802.15.4a-2007 */
165 hw->phy->supported.channels[4] |= 1;
166 /* UWB Low band 802.15.4a-2007 */
167 hw->phy->supported.channels[4] |= 0x1e;
168 /* UWB High band 802.15.4a-2007 */
169 hw->phy->supported.channels[4] |= 0xffe0;
170 /* 750 MHz O-QPSK 802.15.4c-2009 */
171 hw->phy->supported.channels[5] |= 0xf;
172 /* 750 MHz MPSK 802.15.4c-2009 */
173 hw->phy->supported.channels[5] |= 0xf0;
174 /* 950 MHz BPSK 802.15.4d-2009 */
175 hw->phy->supported.channels[6] |= 0x3ff;
176 /* 950 MHz GFSK 802.15.4d-2009 */
177 hw->phy->supported.channels[6] |= 0x3ffc00;
178
179 ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);
180 /* fake phy channel 13 as default */
181 hw->phy->current_channel = 13;
182 phy->channel = hw->phy->current_channel;
183
184 hw->flags = IEEE802154_HW_PROMISCUOUS;
185 hw->parent = dev;
186
187 err = ieee802154_register_hw(hw);
188 if (err)
189 goto err_reg;
190
191 mutex_lock(&fakelb_phys_lock);
192 list_add_tail(&phy->list, &fakelb_phys);
193 mutex_unlock(&fakelb_phys_lock);
194
195 return 0;
196
197err_reg:
198 ieee802154_free_hw(phy->hw);
199 return err;
200}
201
202static void fakelb_del(struct fakelb_phy *phy)
203{
204 list_del(&phy->list);
205
206 ieee802154_unregister_hw(phy->hw);
207 ieee802154_free_hw(phy->hw);
208}
209
210static int fakelb_probe(struct platform_device *pdev)
211{
212 struct fakelb_phy *phy, *tmp;
213 int err, i;
214
215 for (i = 0; i < numlbs; i++) {
216 err = fakelb_add_one(&pdev->dev);
217 if (err < 0)
218 goto err_slave;
219 }
220
221 dev_info(&pdev->dev, "added %i fake ieee802154 hardware devices\n", numlbs);
222 return 0;
223
224err_slave:
225 mutex_lock(&fakelb_phys_lock);
226 list_for_each_entry_safe(phy, tmp, &fakelb_phys, list)
227 fakelb_del(phy);
228 mutex_unlock(&fakelb_phys_lock);
229 return err;
230}
231
232static int fakelb_remove(struct platform_device *pdev)
233{
234 struct fakelb_phy *phy, *tmp;
235
236 mutex_lock(&fakelb_phys_lock);
237 list_for_each_entry_safe(phy, tmp, &fakelb_phys, list)
238 fakelb_del(phy);
239 mutex_unlock(&fakelb_phys_lock);
240 return 0;
241}
242
243static struct platform_device *ieee802154fake_dev;
244
245static struct platform_driver ieee802154fake_driver = {
246 .probe = fakelb_probe,
247 .remove = fakelb_remove,
248 .driver = {
249 .name = "ieee802154fakelb",
250 },
251};
252
253static __init int fakelb_init_module(void)
254{
255 ieee802154fake_dev = platform_device_register_simple(
256 "ieee802154fakelb", -1, NULL, 0);
257 return platform_driver_register(&ieee802154fake_driver);
258}
259
260static __exit void fake_remove_module(void)
261{
262 platform_driver_unregister(&ieee802154fake_driver);
263 platform_device_unregister(ieee802154fake_dev);
264}
265
266module_init(fakelb_init_module);
267module_exit(fake_remove_module);
268MODULE_LICENSE("GPL");
1/*
2 * Loopback IEEE 802.15.4 interface
3 *
4 * Copyright 2007-2012 Siemens AG
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * Written by:
16 * Sergey Lapin <slapin@ossfans.org>
17 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
18 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
19 */
20
21#include <linux/module.h>
22#include <linux/timer.h>
23#include <linux/platform_device.h>
24#include <linux/netdevice.h>
25#include <linux/device.h>
26#include <linux/spinlock.h>
27#include <net/mac802154.h>
28#include <net/cfg802154.h>
29
30static int numlbs = 2;
31
32static LIST_HEAD(fakelb_phys);
33static DEFINE_SPINLOCK(fakelb_phys_lock);
34
35static LIST_HEAD(fakelb_ifup_phys);
36static DEFINE_RWLOCK(fakelb_ifup_phys_lock);
37
38struct fakelb_phy {
39 struct ieee802154_hw *hw;
40
41 u8 page;
42 u8 channel;
43
44 bool suspended;
45
46 struct list_head list;
47 struct list_head list_ifup;
48};
49
50static int fakelb_hw_ed(struct ieee802154_hw *hw, u8 *level)
51{
52 BUG_ON(!level);
53 *level = 0xbe;
54
55 return 0;
56}
57
58static int fakelb_hw_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
59{
60 struct fakelb_phy *phy = hw->priv;
61
62 write_lock_bh(&fakelb_ifup_phys_lock);
63 phy->page = page;
64 phy->channel = channel;
65 write_unlock_bh(&fakelb_ifup_phys_lock);
66 return 0;
67}
68
69static int fakelb_hw_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
70{
71 struct fakelb_phy *current_phy = hw->priv, *phy;
72
73 read_lock_bh(&fakelb_ifup_phys_lock);
74 WARN_ON(current_phy->suspended);
75 list_for_each_entry(phy, &fakelb_ifup_phys, list_ifup) {
76 if (current_phy == phy)
77 continue;
78
79 if (current_phy->page == phy->page &&
80 current_phy->channel == phy->channel) {
81 struct sk_buff *newskb = pskb_copy(skb, GFP_ATOMIC);
82
83 if (newskb)
84 ieee802154_rx_irqsafe(phy->hw, newskb, 0xcc);
85 }
86 }
87 read_unlock_bh(&fakelb_ifup_phys_lock);
88
89 ieee802154_xmit_complete(hw, skb, false);
90 return 0;
91}
92
93static int fakelb_hw_start(struct ieee802154_hw *hw)
94{
95 struct fakelb_phy *phy = hw->priv;
96
97 write_lock_bh(&fakelb_ifup_phys_lock);
98 phy->suspended = false;
99 list_add(&phy->list_ifup, &fakelb_ifup_phys);
100 write_unlock_bh(&fakelb_ifup_phys_lock);
101
102 return 0;
103}
104
105static void fakelb_hw_stop(struct ieee802154_hw *hw)
106{
107 struct fakelb_phy *phy = hw->priv;
108
109 write_lock_bh(&fakelb_ifup_phys_lock);
110 phy->suspended = true;
111 list_del(&phy->list_ifup);
112 write_unlock_bh(&fakelb_ifup_phys_lock);
113}
114
115static const struct ieee802154_ops fakelb_ops = {
116 .owner = THIS_MODULE,
117 .xmit_async = fakelb_hw_xmit,
118 .ed = fakelb_hw_ed,
119 .set_channel = fakelb_hw_channel,
120 .start = fakelb_hw_start,
121 .stop = fakelb_hw_stop,
122};
123
124/* Number of dummy devices to be set up by this module. */
125module_param(numlbs, int, 0);
126MODULE_PARM_DESC(numlbs, " number of pseudo devices");
127
128static int fakelb_add_one(struct device *dev)
129{
130 struct ieee802154_hw *hw;
131 struct fakelb_phy *phy;
132 int err;
133
134 hw = ieee802154_alloc_hw(sizeof(*phy), &fakelb_ops);
135 if (!hw)
136 return -ENOMEM;
137
138 phy = hw->priv;
139 phy->hw = hw;
140
141 /* 868 MHz BPSK 802.15.4-2003 */
142 hw->phy->supported.channels[0] |= 1;
143 /* 915 MHz BPSK 802.15.4-2003 */
144 hw->phy->supported.channels[0] |= 0x7fe;
145 /* 2.4 GHz O-QPSK 802.15.4-2003 */
146 hw->phy->supported.channels[0] |= 0x7FFF800;
147 /* 868 MHz ASK 802.15.4-2006 */
148 hw->phy->supported.channels[1] |= 1;
149 /* 915 MHz ASK 802.15.4-2006 */
150 hw->phy->supported.channels[1] |= 0x7fe;
151 /* 868 MHz O-QPSK 802.15.4-2006 */
152 hw->phy->supported.channels[2] |= 1;
153 /* 915 MHz O-QPSK 802.15.4-2006 */
154 hw->phy->supported.channels[2] |= 0x7fe;
155 /* 2.4 GHz CSS 802.15.4a-2007 */
156 hw->phy->supported.channels[3] |= 0x3fff;
157 /* UWB Sub-gigahertz 802.15.4a-2007 */
158 hw->phy->supported.channels[4] |= 1;
159 /* UWB Low band 802.15.4a-2007 */
160 hw->phy->supported.channels[4] |= 0x1e;
161 /* UWB High band 802.15.4a-2007 */
162 hw->phy->supported.channels[4] |= 0xffe0;
163 /* 750 MHz O-QPSK 802.15.4c-2009 */
164 hw->phy->supported.channels[5] |= 0xf;
165 /* 750 MHz MPSK 802.15.4c-2009 */
166 hw->phy->supported.channels[5] |= 0xf0;
167 /* 950 MHz BPSK 802.15.4d-2009 */
168 hw->phy->supported.channels[6] |= 0x3ff;
169 /* 950 MHz GFSK 802.15.4d-2009 */
170 hw->phy->supported.channels[6] |= 0x3ffc00;
171
172 ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);
173 /* fake phy channel 13 as default */
174 hw->phy->current_channel = 13;
175 phy->channel = hw->phy->current_channel;
176
177 hw->parent = dev;
178
179 err = ieee802154_register_hw(hw);
180 if (err)
181 goto err_reg;
182
183 spin_lock(&fakelb_phys_lock);
184 list_add_tail(&phy->list, &fakelb_phys);
185 spin_unlock(&fakelb_phys_lock);
186
187 return 0;
188
189err_reg:
190 ieee802154_free_hw(phy->hw);
191 return err;
192}
193
194static void fakelb_del(struct fakelb_phy *phy)
195{
196 list_del(&phy->list);
197
198 ieee802154_unregister_hw(phy->hw);
199 ieee802154_free_hw(phy->hw);
200}
201
202static int fakelb_probe(struct platform_device *pdev)
203{
204 struct fakelb_phy *phy, *tmp;
205 int err, i;
206
207 for (i = 0; i < numlbs; i++) {
208 err = fakelb_add_one(&pdev->dev);
209 if (err < 0)
210 goto err_slave;
211 }
212
213 dev_info(&pdev->dev, "added ieee802154 hardware\n");
214 return 0;
215
216err_slave:
217 spin_lock(&fakelb_phys_lock);
218 list_for_each_entry_safe(phy, tmp, &fakelb_phys, list)
219 fakelb_del(phy);
220 spin_unlock(&fakelb_phys_lock);
221 return err;
222}
223
224static int fakelb_remove(struct platform_device *pdev)
225{
226 struct fakelb_phy *phy, *tmp;
227
228 spin_lock(&fakelb_phys_lock);
229 list_for_each_entry_safe(phy, tmp, &fakelb_phys, list)
230 fakelb_del(phy);
231 spin_unlock(&fakelb_phys_lock);
232 return 0;
233}
234
235static struct platform_device *ieee802154fake_dev;
236
237static struct platform_driver ieee802154fake_driver = {
238 .probe = fakelb_probe,
239 .remove = fakelb_remove,
240 .driver = {
241 .name = "ieee802154fakelb",
242 },
243};
244
245static __init int fakelb_init_module(void)
246{
247 ieee802154fake_dev = platform_device_register_simple(
248 "ieee802154fakelb", -1, NULL, 0);
249 return platform_driver_register(&ieee802154fake_driver);
250}
251
252static __exit void fake_remove_module(void)
253{
254 platform_driver_unregister(&ieee802154fake_driver);
255 platform_device_unregister(ieee802154fake_dev);
256}
257
258module_init(fakelb_init_module);
259module_exit(fake_remove_module);
260MODULE_LICENSE("GPL");