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; |
e1e49b64 | 31 | |
db3f5d0d | 32 | struct fakelb_phy { |
5a504397 | 33 | struct ieee802154_hw *hw; |
e1e49b64 | 34 | |
35 | struct list_head list; | |
36 | struct fakelb_priv *fake; | |
37 | ||
38 | spinlock_t lock; | |
39 | bool working; | |
40 | }; | |
41 | ||
42 | struct fakelb_priv { | |
43 | struct list_head list; | |
44 | rwlock_t lock; | |
45 | }; | |
46 | ||
47 | static int | |
5a504397 | 48 | fakelb_hw_ed(struct ieee802154_hw *hw, u8 *level) |
e1e49b64 | 49 | { |
e1e49b64 | 50 | BUG_ON(!level); |
51 | *level = 0xbe; | |
52 | ||
53 | return 0; | |
54 | } | |
55 | ||
56 | static int | |
e37d2ec8 | 57 | fakelb_hw_channel(struct ieee802154_hw *hw, u8 page, u8 channel) |
e1e49b64 | 58 | { |
59 | pr_debug("set channel to %d\n", channel); | |
60 | ||
e1e49b64 | 61 | return 0; |
62 | } | |
63 | ||
64 | static void | |
db3f5d0d | 65 | fakelb_hw_deliver(struct fakelb_phy *phy, struct sk_buff *skb) |
e1e49b64 | 66 | { |
67 | struct sk_buff *newskb; | |
68 | ||
db3f5d0d AA |
69 | spin_lock(&phy->lock); |
70 | if (phy->working) { | |
e1e49b64 | 71 | newskb = pskb_copy(skb, GFP_ATOMIC); |
cb97d9a3 | 72 | if (newskb) |
db3f5d0d | 73 | ieee802154_rx_irqsafe(phy->hw, newskb, 0xcc); |
e1e49b64 | 74 | } |
db3f5d0d | 75 | spin_unlock(&phy->lock); |
e1e49b64 | 76 | } |
77 | ||
78 | static int | |
5a504397 | 79 | fakelb_hw_xmit(struct ieee802154_hw *hw, struct sk_buff *skb) |
e1e49b64 | 80 | { |
db3f5d0d AA |
81 | struct fakelb_phy *current_phy = hw->priv; |
82 | struct fakelb_priv *fake = current_phy->fake; | |
e1e49b64 | 83 | |
e1e49b64 | 84 | read_lock_bh(&fake->lock); |
db3f5d0d | 85 | if (current_phy->list.next == current_phy->list.prev) { |
e1e49b64 | 86 | /* we are the only one device */ |
db3f5d0d | 87 | fakelb_hw_deliver(current_phy, skb); |
e1e49b64 | 88 | } else { |
db3f5d0d AA |
89 | struct fakelb_phy *phy; |
90 | ||
91 | list_for_each_entry(phy, ¤t_phy->fake->list, list) { | |
92 | if (current_phy != phy && | |
93 | (phy->hw->phy->current_channel == | |
94 | current_phy->hw->phy->current_channel)) | |
95 | fakelb_hw_deliver(phy, skb); | |
e1e49b64 | 96 | } |
97 | } | |
98 | read_unlock_bh(&fake->lock); | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
103 | static int | |
5a504397 | 104 | fakelb_hw_start(struct ieee802154_hw *hw) { |
db3f5d0d | 105 | struct fakelb_phy *phy = hw->priv; |
e1e49b64 | 106 | int ret = 0; |
107 | ||
db3f5d0d AA |
108 | spin_lock(&phy->lock); |
109 | if (phy->working) | |
e1e49b64 | 110 | ret = -EBUSY; |
111 | else | |
db3f5d0d AA |
112 | phy->working = 1; |
113 | spin_unlock(&phy->lock); | |
e1e49b64 | 114 | |
115 | return ret; | |
116 | } | |
117 | ||
118 | static void | |
5a504397 | 119 | fakelb_hw_stop(struct ieee802154_hw *hw) { |
db3f5d0d | 120 | struct fakelb_phy *phy = hw->priv; |
e1e49b64 | 121 | |
db3f5d0d AA |
122 | spin_lock(&phy->lock); |
123 | phy->working = 0; | |
124 | spin_unlock(&phy->lock); | |
e1e49b64 | 125 | } |
126 | ||
16301861 | 127 | static const struct ieee802154_ops fakelb_ops = { |
e1e49b64 | 128 | .owner = THIS_MODULE, |
ed0a5dce | 129 | .xmit_sync = fakelb_hw_xmit, |
e1e49b64 | 130 | .ed = fakelb_hw_ed, |
131 | .set_channel = fakelb_hw_channel, | |
132 | .start = fakelb_hw_start, | |
133 | .stop = fakelb_hw_stop, | |
134 | }; | |
135 | ||
136 | /* Number of dummy devices to be set up by this module. */ | |
137 | module_param(numlbs, int, 0); | |
138 | MODULE_PARM_DESC(numlbs, " number of pseudo devices"); | |
139 | ||
140 | static int fakelb_add_one(struct device *dev, struct fakelb_priv *fake) | |
141 | { | |
db3f5d0d | 142 | struct fakelb_phy *phy; |
e1e49b64 | 143 | int err; |
5a504397 | 144 | struct ieee802154_hw *hw; |
e1e49b64 | 145 | |
db3f5d0d | 146 | hw = ieee802154_alloc_hw(sizeof(*phy), &fakelb_ops); |
5a504397 | 147 | if (!hw) |
e1e49b64 | 148 | return -ENOMEM; |
149 | ||
db3f5d0d AA |
150 | phy = hw->priv; |
151 | phy->hw = hw; | |
e1e49b64 | 152 | |
153 | /* 868 MHz BPSK 802.15.4-2003 */ | |
72f655e4 | 154 | hw->phy->supported.channels[0] |= 1; |
e1e49b64 | 155 | /* 915 MHz BPSK 802.15.4-2003 */ |
72f655e4 | 156 | hw->phy->supported.channels[0] |= 0x7fe; |
e1e49b64 | 157 | /* 2.4 GHz O-QPSK 802.15.4-2003 */ |
72f655e4 | 158 | hw->phy->supported.channels[0] |= 0x7FFF800; |
e1e49b64 | 159 | /* 868 MHz ASK 802.15.4-2006 */ |
72f655e4 | 160 | hw->phy->supported.channels[1] |= 1; |
e1e49b64 | 161 | /* 915 MHz ASK 802.15.4-2006 */ |
72f655e4 | 162 | hw->phy->supported.channels[1] |= 0x7fe; |
e1e49b64 | 163 | /* 868 MHz O-QPSK 802.15.4-2006 */ |
72f655e4 | 164 | hw->phy->supported.channels[2] |= 1; |
e1e49b64 | 165 | /* 915 MHz O-QPSK 802.15.4-2006 */ |
72f655e4 | 166 | hw->phy->supported.channels[2] |= 0x7fe; |
e1e49b64 | 167 | /* 2.4 GHz CSS 802.15.4a-2007 */ |
72f655e4 | 168 | hw->phy->supported.channels[3] |= 0x3fff; |
e1e49b64 | 169 | /* UWB Sub-gigahertz 802.15.4a-2007 */ |
72f655e4 | 170 | hw->phy->supported.channels[4] |= 1; |
e1e49b64 | 171 | /* UWB Low band 802.15.4a-2007 */ |
72f655e4 | 172 | hw->phy->supported.channels[4] |= 0x1e; |
e1e49b64 | 173 | /* UWB High band 802.15.4a-2007 */ |
72f655e4 | 174 | hw->phy->supported.channels[4] |= 0xffe0; |
e1e49b64 | 175 | /* 750 MHz O-QPSK 802.15.4c-2009 */ |
72f655e4 | 176 | hw->phy->supported.channels[5] |= 0xf; |
e1e49b64 | 177 | /* 750 MHz MPSK 802.15.4c-2009 */ |
72f655e4 | 178 | hw->phy->supported.channels[5] |= 0xf0; |
e1e49b64 | 179 | /* 950 MHz BPSK 802.15.4d-2009 */ |
72f655e4 | 180 | hw->phy->supported.channels[6] |= 0x3ff; |
e1e49b64 | 181 | /* 950 MHz GFSK 802.15.4d-2009 */ |
72f655e4 | 182 | hw->phy->supported.channels[6] |= 0x3ffc00; |
e1e49b64 | 183 | |
db3f5d0d AA |
184 | INIT_LIST_HEAD(&phy->list); |
185 | phy->fake = fake; | |
e1e49b64 | 186 | |
db3f5d0d | 187 | spin_lock_init(&phy->lock); |
e1e49b64 | 188 | |
5a504397 | 189 | hw->parent = dev; |
e1e49b64 | 190 | |
5a504397 | 191 | err = ieee802154_register_hw(hw); |
e1e49b64 | 192 | if (err) |
193 | goto err_reg; | |
194 | ||
195 | write_lock_bh(&fake->lock); | |
db3f5d0d | 196 | list_add_tail(&phy->list, &fake->list); |
e1e49b64 | 197 | write_unlock_bh(&fake->lock); |
198 | ||
199 | return 0; | |
200 | ||
201 | err_reg: | |
db3f5d0d | 202 | ieee802154_free_hw(phy->hw); |
e1e49b64 | 203 | return err; |
204 | } | |
205 | ||
db3f5d0d | 206 | static void fakelb_del(struct fakelb_phy *phy) |
e1e49b64 | 207 | { |
db3f5d0d AA |
208 | write_lock_bh(&phy->fake->lock); |
209 | list_del(&phy->list); | |
210 | write_unlock_bh(&phy->fake->lock); | |
e1e49b64 | 211 | |
db3f5d0d AA |
212 | ieee802154_unregister_hw(phy->hw); |
213 | ieee802154_free_hw(phy->hw); | |
e1e49b64 | 214 | } |
215 | ||
bb1f4606 | 216 | static int fakelb_probe(struct platform_device *pdev) |
e1e49b64 | 217 | { |
218 | struct fakelb_priv *priv; | |
db3f5d0d | 219 | struct fakelb_phy *phy, *tmp; |
e1e49b64 | 220 | int err = -ENOMEM; |
221 | int i; | |
222 | ||
12b5c38f HS |
223 | priv = devm_kzalloc(&pdev->dev, sizeof(struct fakelb_priv), |
224 | GFP_KERNEL); | |
e1e49b64 | 225 | if (!priv) |
226 | goto err_alloc; | |
227 | ||
228 | INIT_LIST_HEAD(&priv->list); | |
229 | rwlock_init(&priv->lock); | |
230 | ||
231 | for (i = 0; i < numlbs; i++) { | |
232 | err = fakelb_add_one(&pdev->dev, priv); | |
233 | if (err < 0) | |
234 | goto err_slave; | |
235 | } | |
236 | ||
237 | platform_set_drvdata(pdev, priv); | |
238 | dev_info(&pdev->dev, "added ieee802154 hardware\n"); | |
239 | return 0; | |
240 | ||
241 | err_slave: | |
db3f5d0d AA |
242 | list_for_each_entry_safe(phy, tmp, &priv->list, list) |
243 | fakelb_del(phy); | |
e1e49b64 | 244 | err_alloc: |
245 | return err; | |
246 | } | |
247 | ||
bb1f4606 | 248 | static int fakelb_remove(struct platform_device *pdev) |
e1e49b64 | 249 | { |
250 | struct fakelb_priv *priv = platform_get_drvdata(pdev); | |
db3f5d0d | 251 | struct fakelb_phy *phy, *temp; |
e1e49b64 | 252 | |
db3f5d0d AA |
253 | list_for_each_entry_safe(phy, temp, &priv->list, list) |
254 | fakelb_del(phy); | |
e1e49b64 | 255 | |
256 | return 0; | |
257 | } | |
258 | ||
259 | static struct platform_device *ieee802154fake_dev; | |
260 | ||
261 | static struct platform_driver ieee802154fake_driver = { | |
262 | .probe = fakelb_probe, | |
bb1f4606 | 263 | .remove = fakelb_remove, |
e1e49b64 | 264 | .driver = { |
265 | .name = "ieee802154fakelb", | |
e1e49b64 | 266 | }, |
267 | }; | |
268 | ||
269 | static __init int fakelb_init_module(void) | |
270 | { | |
271 | ieee802154fake_dev = platform_device_register_simple( | |
272 | "ieee802154fakelb", -1, NULL, 0); | |
273 | return platform_driver_register(&ieee802154fake_driver); | |
274 | } | |
275 | ||
276 | static __exit void fake_remove_module(void) | |
277 | { | |
278 | platform_driver_unregister(&ieee802154fake_driver); | |
279 | platform_device_unregister(ieee802154fake_dev); | |
280 | } | |
281 | ||
282 | module_init(fakelb_init_module); | |
283 | module_exit(fake_remove_module); | |
284 | MODULE_LICENSE("GPL"); |