Commit | Line | Data |
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e1e49b64 | 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 | * | |
e1e49b64 | 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> | |
12b5c38f | 25 | #include <linux/device.h> |
e1e49b64 | 26 | #include <linux/spinlock.h> |
27 | #include <net/mac802154.h> | |
5ad60d36 | 28 | #include <net/cfg802154.h> |
e1e49b64 | 29 | |
7e57905b | 30 | static int numlbs = 2; |
3335d98c | 31 | static DEFINE_RWLOCK(fakelb_lock); |
b82b99f1 | 32 | static LIST_HEAD(fakelb_phys); |
e1e49b64 | 33 | |
db3f5d0d | 34 | struct fakelb_phy { |
5a504397 | 35 | struct ieee802154_hw *hw; |
e1e49b64 | 36 | |
37 | struct list_head list; | |
e1e49b64 | 38 | |
39 | spinlock_t lock; | |
40 | bool working; | |
41 | }; | |
42 | ||
e1e49b64 | 43 | static int |
5a504397 | 44 | fakelb_hw_ed(struct ieee802154_hw *hw, u8 *level) |
e1e49b64 | 45 | { |
e1e49b64 | 46 | BUG_ON(!level); |
47 | *level = 0xbe; | |
48 | ||
49 | return 0; | |
50 | } | |
51 | ||
52 | static int | |
e37d2ec8 | 53 | fakelb_hw_channel(struct ieee802154_hw *hw, u8 page, u8 channel) |
e1e49b64 | 54 | { |
55 | pr_debug("set channel to %d\n", channel); | |
56 | ||
e1e49b64 | 57 | return 0; |
58 | } | |
59 | ||
60 | static void | |
db3f5d0d | 61 | fakelb_hw_deliver(struct fakelb_phy *phy, struct sk_buff *skb) |
e1e49b64 | 62 | { |
63 | struct sk_buff *newskb; | |
64 | ||
db3f5d0d AA |
65 | spin_lock(&phy->lock); |
66 | if (phy->working) { | |
e1e49b64 | 67 | newskb = pskb_copy(skb, GFP_ATOMIC); |
cb97d9a3 | 68 | if (newskb) |
db3f5d0d | 69 | ieee802154_rx_irqsafe(phy->hw, newskb, 0xcc); |
e1e49b64 | 70 | } |
db3f5d0d | 71 | spin_unlock(&phy->lock); |
e1e49b64 | 72 | } |
73 | ||
74 | static int | |
5a504397 | 75 | fakelb_hw_xmit(struct ieee802154_hw *hw, struct sk_buff *skb) |
e1e49b64 | 76 | { |
db3f5d0d | 77 | struct fakelb_phy *current_phy = hw->priv; |
9f8b97f8 | 78 | struct fakelb_phy *phy; |
e1e49b64 | 79 | |
3335d98c | 80 | read_lock_bh(&fakelb_lock); |
b82b99f1 | 81 | list_for_each_entry(phy, &fakelb_phys, list) { |
9f8b97f8 AA |
82 | if (current_phy == phy) |
83 | continue; | |
84 | ||
85 | if (phy->hw->phy->current_channel == | |
86 | current_phy->hw->phy->current_channel) | |
87 | fakelb_hw_deliver(phy, skb); | |
e1e49b64 | 88 | } |
3335d98c | 89 | read_unlock_bh(&fakelb_lock); |
e1e49b64 | 90 | |
91 | return 0; | |
92 | } | |
93 | ||
94 | static int | |
5a504397 | 95 | fakelb_hw_start(struct ieee802154_hw *hw) { |
db3f5d0d | 96 | struct fakelb_phy *phy = hw->priv; |
e1e49b64 | 97 | int ret = 0; |
98 | ||
db3f5d0d AA |
99 | spin_lock(&phy->lock); |
100 | if (phy->working) | |
e1e49b64 | 101 | ret = -EBUSY; |
102 | else | |
db3f5d0d AA |
103 | phy->working = 1; |
104 | spin_unlock(&phy->lock); | |
e1e49b64 | 105 | |
106 | return ret; | |
107 | } | |
108 | ||
109 | static void | |
5a504397 | 110 | fakelb_hw_stop(struct ieee802154_hw *hw) { |
db3f5d0d | 111 | struct fakelb_phy *phy = hw->priv; |
e1e49b64 | 112 | |
db3f5d0d AA |
113 | spin_lock(&phy->lock); |
114 | phy->working = 0; | |
115 | spin_unlock(&phy->lock); | |
e1e49b64 | 116 | } |
117 | ||
16301861 | 118 | static const struct ieee802154_ops fakelb_ops = { |
e1e49b64 | 119 | .owner = THIS_MODULE, |
ed0a5dce | 120 | .xmit_sync = fakelb_hw_xmit, |
e1e49b64 | 121 | .ed = fakelb_hw_ed, |
122 | .set_channel = fakelb_hw_channel, | |
123 | .start = fakelb_hw_start, | |
124 | .stop = fakelb_hw_stop, | |
125 | }; | |
126 | ||
127 | /* Number of dummy devices to be set up by this module. */ | |
128 | module_param(numlbs, int, 0); | |
129 | MODULE_PARM_DESC(numlbs, " number of pseudo devices"); | |
130 | ||
b82b99f1 | 131 | static int fakelb_add_one(struct device *dev) |
e1e49b64 | 132 | { |
db3f5d0d | 133 | struct fakelb_phy *phy; |
e1e49b64 | 134 | int err; |
5a504397 | 135 | struct ieee802154_hw *hw; |
e1e49b64 | 136 | |
db3f5d0d | 137 | hw = ieee802154_alloc_hw(sizeof(*phy), &fakelb_ops); |
5a504397 | 138 | if (!hw) |
e1e49b64 | 139 | return -ENOMEM; |
140 | ||
db3f5d0d AA |
141 | phy = hw->priv; |
142 | phy->hw = hw; | |
e1e49b64 | 143 | |
144 | /* 868 MHz BPSK 802.15.4-2003 */ | |
72f655e4 | 145 | hw->phy->supported.channels[0] |= 1; |
e1e49b64 | 146 | /* 915 MHz BPSK 802.15.4-2003 */ |
72f655e4 | 147 | hw->phy->supported.channels[0] |= 0x7fe; |
e1e49b64 | 148 | /* 2.4 GHz O-QPSK 802.15.4-2003 */ |
72f655e4 | 149 | hw->phy->supported.channels[0] |= 0x7FFF800; |
e1e49b64 | 150 | /* 868 MHz ASK 802.15.4-2006 */ |
72f655e4 | 151 | hw->phy->supported.channels[1] |= 1; |
e1e49b64 | 152 | /* 915 MHz ASK 802.15.4-2006 */ |
72f655e4 | 153 | hw->phy->supported.channels[1] |= 0x7fe; |
e1e49b64 | 154 | /* 868 MHz O-QPSK 802.15.4-2006 */ |
72f655e4 | 155 | hw->phy->supported.channels[2] |= 1; |
e1e49b64 | 156 | /* 915 MHz O-QPSK 802.15.4-2006 */ |
72f655e4 | 157 | hw->phy->supported.channels[2] |= 0x7fe; |
e1e49b64 | 158 | /* 2.4 GHz CSS 802.15.4a-2007 */ |
72f655e4 | 159 | hw->phy->supported.channels[3] |= 0x3fff; |
e1e49b64 | 160 | /* UWB Sub-gigahertz 802.15.4a-2007 */ |
72f655e4 | 161 | hw->phy->supported.channels[4] |= 1; |
e1e49b64 | 162 | /* UWB Low band 802.15.4a-2007 */ |
72f655e4 | 163 | hw->phy->supported.channels[4] |= 0x1e; |
e1e49b64 | 164 | /* UWB High band 802.15.4a-2007 */ |
72f655e4 | 165 | hw->phy->supported.channels[4] |= 0xffe0; |
e1e49b64 | 166 | /* 750 MHz O-QPSK 802.15.4c-2009 */ |
72f655e4 | 167 | hw->phy->supported.channels[5] |= 0xf; |
e1e49b64 | 168 | /* 750 MHz MPSK 802.15.4c-2009 */ |
72f655e4 | 169 | hw->phy->supported.channels[5] |= 0xf0; |
e1e49b64 | 170 | /* 950 MHz BPSK 802.15.4d-2009 */ |
72f655e4 | 171 | hw->phy->supported.channels[6] |= 0x3ff; |
e1e49b64 | 172 | /* 950 MHz GFSK 802.15.4d-2009 */ |
72f655e4 | 173 | hw->phy->supported.channels[6] |= 0x3ffc00; |
e1e49b64 | 174 | |
db3f5d0d | 175 | spin_lock_init(&phy->lock); |
e1e49b64 | 176 | |
5a504397 | 177 | hw->parent = dev; |
e1e49b64 | 178 | |
5a504397 | 179 | err = ieee802154_register_hw(hw); |
e1e49b64 | 180 | if (err) |
181 | goto err_reg; | |
182 | ||
3335d98c | 183 | write_lock_bh(&fakelb_lock); |
b82b99f1 | 184 | list_add_tail(&phy->list, &fakelb_phys); |
3335d98c | 185 | write_unlock_bh(&fakelb_lock); |
e1e49b64 | 186 | |
187 | return 0; | |
188 | ||
189 | err_reg: | |
db3f5d0d | 190 | ieee802154_free_hw(phy->hw); |
e1e49b64 | 191 | return err; |
192 | } | |
193 | ||
db3f5d0d | 194 | static void fakelb_del(struct fakelb_phy *phy) |
e1e49b64 | 195 | { |
db3f5d0d | 196 | list_del(&phy->list); |
e1e49b64 | 197 | |
db3f5d0d AA |
198 | ieee802154_unregister_hw(phy->hw); |
199 | ieee802154_free_hw(phy->hw); | |
e1e49b64 | 200 | } |
201 | ||
bb1f4606 | 202 | static int fakelb_probe(struct platform_device *pdev) |
e1e49b64 | 203 | { |
db3f5d0d | 204 | struct fakelb_phy *phy, *tmp; |
e1e49b64 | 205 | int err = -ENOMEM; |
206 | int i; | |
207 | ||
e1e49b64 | 208 | for (i = 0; i < numlbs; i++) { |
b82b99f1 | 209 | err = fakelb_add_one(&pdev->dev); |
e1e49b64 | 210 | if (err < 0) |
211 | goto err_slave; | |
212 | } | |
213 | ||
e1e49b64 | 214 | dev_info(&pdev->dev, "added ieee802154 hardware\n"); |
215 | return 0; | |
216 | ||
217 | err_slave: | |
6fa2cffe | 218 | write_lock_bh(&fakelb_lock); |
b82b99f1 | 219 | list_for_each_entry_safe(phy, tmp, &fakelb_phys, list) |
db3f5d0d | 220 | fakelb_del(phy); |
6fa2cffe | 221 | write_unlock_bh(&fakelb_lock); |
e1e49b64 | 222 | return err; |
223 | } | |
224 | ||
bb1f4606 | 225 | static int fakelb_remove(struct platform_device *pdev) |
e1e49b64 | 226 | { |
db3f5d0d | 227 | struct fakelb_phy *phy, *temp; |
e1e49b64 | 228 | |
6fa2cffe | 229 | write_lock_bh(&fakelb_lock); |
b82b99f1 | 230 | list_for_each_entry_safe(phy, temp, &fakelb_phys, list) |
db3f5d0d | 231 | fakelb_del(phy); |
6fa2cffe | 232 | write_unlock_bh(&fakelb_lock); |
e1e49b64 | 233 | return 0; |
234 | } | |
235 | ||
236 | static struct platform_device *ieee802154fake_dev; | |
237 | ||
238 | static struct platform_driver ieee802154fake_driver = { | |
239 | .probe = fakelb_probe, | |
bb1f4606 | 240 | .remove = fakelb_remove, |
e1e49b64 | 241 | .driver = { |
242 | .name = "ieee802154fakelb", | |
e1e49b64 | 243 | }, |
244 | }; | |
245 | ||
246 | static __init int fakelb_init_module(void) | |
247 | { | |
248 | ieee802154fake_dev = platform_device_register_simple( | |
249 | "ieee802154fakelb", -1, NULL, 0); | |
250 | return platform_driver_register(&ieee802154fake_driver); | |
251 | } | |
252 | ||
253 | static __exit void fake_remove_module(void) | |
254 | { | |
255 | platform_driver_unregister(&ieee802154fake_driver); | |
256 | platform_device_unregister(ieee802154fake_dev); | |
257 | } | |
258 | ||
259 | module_init(fakelb_init_module); | |
260 | module_exit(fake_remove_module); | |
261 | MODULE_LICENSE("GPL"); |