source: src/linux/universal/linux-4.4/drivers/net/ieee802154/fakelb.c @ 31662

Last change on this file since 31662 was 31662, checked in by brainslayer, 11 days ago

use new squashfs in all kernels

File size: 6.2 KB
Line 
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 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        mutex_lock(&fakelb_phys_lock);
184        list_add_tail(&phy->list, &fakelb_phys);
185        mutex_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        mutex_lock(&fakelb_phys_lock);
218        list_for_each_entry_safe(phy, tmp, &fakelb_phys, list)
219                fakelb_del(phy);
220        mutex_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        mutex_lock(&fakelb_phys_lock);
229        list_for_each_entry_safe(phy, tmp, &fakelb_phys, list)
230                fakelb_del(phy);
231        mutex_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");
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