2 * Copyright (C) 2007-2012 Siemens AG
5 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
7 * Based on the code from 'linux-zigbee.sourceforge.net' project.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2
11 * as published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/netdevice.h>
27 #include <net/netlink.h>
28 #include <linux/nl802154.h>
29 #include <net/mac802154.h>
30 #include <net/ieee802154_netdev.h>
31 #include <net/route.h>
32 #include <net/wpan-phy.h>
34 #include "mac802154.h"
36 int mac802154_slave_open(struct net_device *dev)
38 struct mac802154_sub_if_data *priv = netdev_priv(dev);
39 struct mac802154_sub_if_data *subif;
40 struct mac802154_priv *ipriv = priv->hw;
45 if (priv->type == IEEE802154_DEV_WPAN) {
46 mutex_lock(&priv->hw->slaves_mtx);
47 list_for_each_entry(subif, &priv->hw->slaves, list) {
48 if (subif != priv && subif->type == priv->type &&
50 mutex_unlock(&priv->hw->slaves_mtx);
54 mutex_unlock(&priv->hw->slaves_mtx);
57 mutex_lock(&priv->hw->slaves_mtx);
59 mutex_unlock(&priv->hw->slaves_mtx);
61 if (ipriv->open_count++ == 0) {
62 res = ipriv->ops->start(&ipriv->hw);
68 if (ipriv->ops->ieee_addr) {
69 __le64 addr = ieee802154_devaddr_from_raw(dev->dev_addr);
71 res = ipriv->ops->ieee_addr(&ipriv->hw, addr);
75 mac802154_dev_set_ieee_addr(dev);
78 netif_start_queue(dev);
81 priv->hw->open_count--;
86 int mac802154_slave_close(struct net_device *dev)
88 struct mac802154_sub_if_data *priv = netdev_priv(dev);
89 struct mac802154_priv *ipriv = priv->hw;
93 netif_stop_queue(dev);
95 mutex_lock(&priv->hw->slaves_mtx);
96 priv->running = false;
97 mutex_unlock(&priv->hw->slaves_mtx);
99 if (!--ipriv->open_count)
100 ipriv->ops->stop(&ipriv->hw);
106 mac802154_netdev_register(struct wpan_phy *phy, struct net_device *dev)
108 struct mac802154_sub_if_data *priv;
109 struct mac802154_priv *ipriv;
112 ipriv = wpan_phy_priv(phy);
114 priv = netdev_priv(dev);
118 dev->needed_headroom = ipriv->hw.extra_tx_headroom;
120 SET_NETDEV_DEV(dev, &ipriv->phy->dev);
122 mutex_lock(&ipriv->slaves_mtx);
123 if (!ipriv->running) {
124 mutex_unlock(&ipriv->slaves_mtx);
127 mutex_unlock(&ipriv->slaves_mtx);
129 err = register_netdev(dev);
134 mutex_lock(&ipriv->slaves_mtx);
135 list_add_tail_rcu(&priv->list, &ipriv->slaves);
136 mutex_unlock(&ipriv->slaves_mtx);
143 mac802154_del_iface(struct wpan_phy *phy, struct net_device *dev)
145 struct mac802154_sub_if_data *sdata;
148 sdata = netdev_priv(dev);
150 BUG_ON(sdata->hw->phy != phy);
152 mutex_lock(&sdata->hw->slaves_mtx);
153 list_del_rcu(&sdata->list);
154 mutex_unlock(&sdata->hw->slaves_mtx);
157 unregister_netdevice(sdata->dev);
160 static struct net_device *
161 mac802154_add_iface(struct wpan_phy *phy, const char *name, int type)
163 struct net_device *dev;
167 case IEEE802154_DEV_MONITOR:
168 dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
169 name, mac802154_monitor_setup);
171 case IEEE802154_DEV_WPAN:
172 dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
173 name, mac802154_wpan_setup);
183 err = mac802154_netdev_register(phy, dev);
187 dev_hold(dev); /* we return an incremented device refcount */
196 static int mac802154_set_txpower(struct wpan_phy *phy, int db)
198 struct mac802154_priv *priv = wpan_phy_priv(phy);
200 return priv->ops->set_txpower(&priv->hw, db);
203 static int mac802154_set_lbt(struct wpan_phy *phy, bool on)
205 struct mac802154_priv *priv = wpan_phy_priv(phy);
207 return priv->ops->set_lbt(&priv->hw, on);
210 static int mac802154_set_cca_mode(struct wpan_phy *phy, u8 mode)
212 struct mac802154_priv *priv = wpan_phy_priv(phy);
214 return priv->ops->set_cca_mode(&priv->hw, mode);
217 static int mac802154_set_cca_ed_level(struct wpan_phy *phy, s32 level)
219 struct mac802154_priv *priv = wpan_phy_priv(phy);
221 return priv->ops->set_cca_ed_level(&priv->hw, level);
224 static int mac802154_set_csma_params(struct wpan_phy *phy, u8 min_be,
225 u8 max_be, u8 retries)
227 struct mac802154_priv *priv = wpan_phy_priv(phy);
229 return priv->ops->set_csma_params(&priv->hw, min_be, max_be, retries);
232 static int mac802154_set_frame_retries(struct wpan_phy *phy, s8 retries)
234 struct mac802154_priv *priv = wpan_phy_priv(phy);
236 return priv->ops->set_frame_retries(&priv->hw, retries);
239 struct ieee802154_dev *
240 ieee802154_alloc_device(size_t priv_data_len, struct ieee802154_ops *ops)
242 struct wpan_phy *phy;
243 struct mac802154_priv *priv;
246 if (!ops || !ops->xmit || !ops->ed || !ops->start ||
247 !ops->stop || !ops->set_channel) {
248 pr_err("undefined IEEE802.15.4 device operations\n");
252 /* Ensure 32-byte alignment of our private data and hw private data.
253 * We use the wpan_phy priv data for both our mac802154_priv and for
254 * the driver's private data
256 * in memory it'll be like this:
258 * +-----------------------+
259 * | struct wpan_phy |
260 * +-----------------------+
261 * | struct mac802154_priv |
262 * +-----------------------+
263 * | driver's private data |
264 * +-----------------------+
266 * Due to ieee802154 layer isn't aware of driver and MAC structures,
267 * so lets allign them here.
270 priv_size = ALIGN(sizeof(*priv), NETDEV_ALIGN) + priv_data_len;
272 phy = wpan_phy_alloc(priv_size);
274 pr_err("failure to allocate master IEEE802.15.4 device\n");
278 priv = wpan_phy_priv(phy);
279 priv->hw.phy = priv->phy = phy;
280 priv->hw.priv = (char *)priv + ALIGN(sizeof(*priv), NETDEV_ALIGN);
283 INIT_LIST_HEAD(&priv->slaves);
284 mutex_init(&priv->slaves_mtx);
288 EXPORT_SYMBOL(ieee802154_alloc_device);
290 void ieee802154_free_device(struct ieee802154_dev *hw)
292 struct mac802154_priv *priv = mac802154_to_priv(hw);
294 BUG_ON(!list_empty(&priv->slaves));
296 mutex_destroy(&priv->slaves_mtx);
298 wpan_phy_free(priv->phy);
300 EXPORT_SYMBOL(ieee802154_free_device);
302 int ieee802154_register_device(struct ieee802154_dev *dev)
304 struct mac802154_priv *priv = mac802154_to_priv(dev);
307 priv->dev_workqueue =
308 create_singlethread_workqueue(wpan_phy_name(priv->phy));
309 if (!priv->dev_workqueue)
312 wpan_phy_set_dev(priv->phy, priv->hw.parent);
314 priv->phy->add_iface = mac802154_add_iface;
315 priv->phy->del_iface = mac802154_del_iface;
316 if (priv->ops->set_txpower)
317 priv->phy->set_txpower = mac802154_set_txpower;
318 if (priv->ops->set_lbt)
319 priv->phy->set_lbt = mac802154_set_lbt;
320 if (priv->ops->set_cca_mode)
321 priv->phy->set_cca_mode = mac802154_set_cca_mode;
322 if (priv->ops->set_cca_ed_level)
323 priv->phy->set_cca_ed_level = mac802154_set_cca_ed_level;
324 if (priv->ops->set_csma_params)
325 priv->phy->set_csma_params = mac802154_set_csma_params;
326 if (priv->ops->set_frame_retries)
327 priv->phy->set_frame_retries = mac802154_set_frame_retries;
329 rc = wpan_phy_register(priv->phy);
335 mutex_lock(&priv->slaves_mtx);
336 priv->running = MAC802154_DEVICE_RUN;
337 mutex_unlock(&priv->slaves_mtx);
344 destroy_workqueue(priv->dev_workqueue);
348 EXPORT_SYMBOL(ieee802154_register_device);
350 void ieee802154_unregister_device(struct ieee802154_dev *dev)
352 struct mac802154_priv *priv = mac802154_to_priv(dev);
353 struct mac802154_sub_if_data *sdata, *next;
355 flush_workqueue(priv->dev_workqueue);
356 destroy_workqueue(priv->dev_workqueue);
360 mutex_lock(&priv->slaves_mtx);
361 priv->running = MAC802154_DEVICE_STOPPED;
362 mutex_unlock(&priv->slaves_mtx);
364 list_for_each_entry_safe(sdata, next, &priv->slaves, list) {
365 mutex_lock(&sdata->hw->slaves_mtx);
366 list_del(&sdata->list);
367 mutex_unlock(&sdata->hw->slaves_mtx);
369 unregister_netdevice(sdata->dev);
374 wpan_phy_unregister(priv->phy);
376 EXPORT_SYMBOL(ieee802154_unregister_device);
378 MODULE_DESCRIPTION("IEEE 802.15.4 implementation");
379 MODULE_LICENSE("GPL v2");