1/* This program is free software; you can redistribute it and/or modify
2 * it under the terms of the GNU General Public License version 2
3 * as published by the Free Software Foundation.
4 *
5 * This program is distributed in the hope that it will be useful,
6 * but WITHOUT ANY WARRANTY; without even the implied warranty of
7 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
8 * GNU General Public License for more details.
9 *
10 * Authors:
11 * Alexander Aring <aar@pengutronix.de>
12 *
13 * Based on: net/mac80211/cfg.c
14 */
15
16#include <net/rtnetlink.h>
17#include <net/cfg802154.h>
18
19#include "ieee802154_i.h"
20#include "driver-ops.h"
21#include "cfg.h"
22
23static struct net_device *
24ieee802154_add_iface_deprecated(struct wpan_phy *wpan_phy,
25				const char *name,
26				unsigned char name_assign_type, int type)
27{
28	struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
29	struct net_device *dev;
30
31	rtnl_lock();
32	dev = ieee802154_if_add(local, name, name_assign_type, type,
33				cpu_to_le64(0x0000000000000000ULL));
34	rtnl_unlock();
35
36	return dev;
37}
38
39static void ieee802154_del_iface_deprecated(struct wpan_phy *wpan_phy,
40					    struct net_device *dev)
41{
42	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
43
44	ieee802154_if_remove(sdata);
45}
46
47static int
48ieee802154_add_iface(struct wpan_phy *phy, const char *name,
49		     unsigned char name_assign_type,
50		     enum nl802154_iftype type, __le64 extended_addr)
51{
52	struct ieee802154_local *local = wpan_phy_priv(phy);
53	struct net_device *err;
54
55	err = ieee802154_if_add(local, name, name_assign_type, type,
56				extended_addr);
57	return PTR_ERR_OR_ZERO(err);
58}
59
60static int
61ieee802154_del_iface(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev)
62{
63	ieee802154_if_remove(IEEE802154_WPAN_DEV_TO_SUB_IF(wpan_dev));
64
65	return 0;
66}
67
68static int
69ieee802154_set_channel(struct wpan_phy *wpan_phy, u8 page, u8 channel)
70{
71	struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
72	int ret;
73
74	ASSERT_RTNL();
75
76	/* check if phy support this setting */
77	if (!(wpan_phy->channels_supported[page] & BIT(channel)))
78		return -EINVAL;
79
80	ret = drv_set_channel(local, page, channel);
81	if (!ret) {
82		wpan_phy->current_page = page;
83		wpan_phy->current_channel = channel;
84	}
85
86	return ret;
87}
88
89static int
90ieee802154_set_cca_mode(struct wpan_phy *wpan_phy,
91			const struct wpan_phy_cca *cca)
92{
93	struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
94	int ret;
95
96	ASSERT_RTNL();
97
98	/* check if phy support this setting */
99	if (!(local->hw.flags & IEEE802154_HW_CCA_MODE))
100		return -EOPNOTSUPP;
101
102	ret = drv_set_cca_mode(local, cca);
103	if (!ret)
104		wpan_phy->cca = *cca;
105
106	return ret;
107}
108
109static int
110ieee802154_set_pan_id(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
111		      __le16 pan_id)
112{
113	ASSERT_RTNL();
114
115	/* TODO
116	 * I am not sure about to check here on broadcast pan_id.
117	 * Broadcast is a valid setting, comment from 802.15.4:
118	 * If this value is 0xffff, the device is not associated.
119	 *
120	 * This could useful to simple deassociate an device.
121	 */
122	if (pan_id == cpu_to_le16(IEEE802154_PAN_ID_BROADCAST))
123		return -EINVAL;
124
125	wpan_dev->pan_id = pan_id;
126	return 0;
127}
128
129static int
130ieee802154_set_backoff_exponent(struct wpan_phy *wpan_phy,
131				struct wpan_dev *wpan_dev,
132				u8 min_be, u8 max_be)
133{
134	struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
135
136	ASSERT_RTNL();
137
138	if (!(local->hw.flags & IEEE802154_HW_CSMA_PARAMS))
139		return -EOPNOTSUPP;
140
141	wpan_dev->min_be = min_be;
142	wpan_dev->max_be = max_be;
143	return 0;
144}
145
146static int
147ieee802154_set_short_addr(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
148			  __le16 short_addr)
149{
150	ASSERT_RTNL();
151
152	/* TODO
153	 * I am not sure about to check here on broadcast short_addr.
154	 * Broadcast is a valid setting, comment from 802.15.4:
155	 * A value of 0xfffe indicates that the device has
156	 * associated but has not been allocated an address. A
157	 * value of 0xffff indicates that the device does not
158	 * have a short address.
159	 *
160	 * I think we should allow to set these settings but
161	 * don't allow to allow socket communication with it.
162	 */
163	if (short_addr == cpu_to_le16(IEEE802154_ADDR_SHORT_UNSPEC) ||
164	    short_addr == cpu_to_le16(IEEE802154_ADDR_SHORT_BROADCAST))
165		return -EINVAL;
166
167	wpan_dev->short_addr = short_addr;
168	return 0;
169}
170
171static int
172ieee802154_set_max_csma_backoffs(struct wpan_phy *wpan_phy,
173				 struct wpan_dev *wpan_dev,
174				 u8 max_csma_backoffs)
175{
176	struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
177
178	ASSERT_RTNL();
179
180	if (!(local->hw.flags & IEEE802154_HW_CSMA_PARAMS))
181		return -EOPNOTSUPP;
182
183	wpan_dev->csma_retries = max_csma_backoffs;
184	return 0;
185}
186
187static int
188ieee802154_set_max_frame_retries(struct wpan_phy *wpan_phy,
189				 struct wpan_dev *wpan_dev,
190				 s8 max_frame_retries)
191{
192	struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
193
194	ASSERT_RTNL();
195
196	if (!(local->hw.flags & IEEE802154_HW_FRAME_RETRIES))
197		return -EOPNOTSUPP;
198
199	wpan_dev->frame_retries = max_frame_retries;
200	return 0;
201}
202
203static int
204ieee802154_set_lbt_mode(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
205			bool mode)
206{
207	struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
208
209	ASSERT_RTNL();
210
211	if (!(local->hw.flags & IEEE802154_HW_LBT))
212		return -EOPNOTSUPP;
213
214	wpan_dev->lbt = mode;
215	return 0;
216}
217
218const struct cfg802154_ops mac802154_config_ops = {
219	.add_virtual_intf_deprecated = ieee802154_add_iface_deprecated,
220	.del_virtual_intf_deprecated = ieee802154_del_iface_deprecated,
221	.add_virtual_intf = ieee802154_add_iface,
222	.del_virtual_intf = ieee802154_del_iface,
223	.set_channel = ieee802154_set_channel,
224	.set_cca_mode = ieee802154_set_cca_mode,
225	.set_pan_id = ieee802154_set_pan_id,
226	.set_short_addr = ieee802154_set_short_addr,
227	.set_backoff_exponent = ieee802154_set_backoff_exponent,
228	.set_max_csma_backoffs = ieee802154_set_max_csma_backoffs,
229	.set_max_frame_retries = ieee802154_set_max_frame_retries,
230	.set_lbt_mode = ieee802154_set_lbt_mode,
231};
232