summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/rt2x00/rt2x00config.c
blob: e66fb316cd61fda7fae8add82217d06e01213628 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
/*
	Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
	<http://rt2x00.serialmonkey.com>

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the
	Free Software Foundation, Inc.,
	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/*
	Module: rt2x00lib
	Abstract: rt2x00 generic configuration routines.
 */

#include <linux/kernel.h>
#include <linux/module.h>

#include "rt2x00.h"
#include "rt2x00lib.h"

void rt2x00lib_config_intf(struct rt2x00_dev *rt2x00dev,
			   struct rt2x00_intf *intf,
			   enum nl80211_iftype type,
			   u8 *mac, u8 *bssid)
{
	struct rt2x00intf_conf conf;
	unsigned int flags = 0;

	conf.type = type;

	switch (type) {
	case NL80211_IFTYPE_ADHOC:
	case NL80211_IFTYPE_AP:
		conf.sync = TSF_SYNC_BEACON;
		break;
	case NL80211_IFTYPE_STATION:
		conf.sync = TSF_SYNC_INFRA;
		break;
	default:
		conf.sync = TSF_SYNC_NONE;
		break;
	}

	/*
	 * Note that when NULL is passed as address we will send
	 * 00:00:00:00:00 to the device to clear the address.
	 * This will prevent the device being confused when it wants
	 * to ACK frames or consideres itself associated.
	 */
	memset(&conf.mac, 0, sizeof(conf.mac));
	if (mac)
		memcpy(&conf.mac, mac, ETH_ALEN);

	memset(&conf.bssid, 0, sizeof(conf.bssid));
	if (bssid)
		memcpy(&conf.bssid, bssid, ETH_ALEN);

	flags |= CONFIG_UPDATE_TYPE;
	if (mac || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count))
		flags |= CONFIG_UPDATE_MAC;
	if (bssid || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count))
		flags |= CONFIG_UPDATE_BSSID;

	rt2x00dev->ops->lib->config_intf(rt2x00dev, intf, &conf, flags);
}

void rt2x00lib_config_erp(struct rt2x00_dev *rt2x00dev,
			  struct rt2x00_intf *intf,
			  struct ieee80211_bss_conf *bss_conf)
{
	struct rt2x00lib_erp erp;

	memset(&erp, 0, sizeof(erp));

	erp.short_preamble = bss_conf->use_short_preamble;
	erp.cts_protection = bss_conf->use_cts_prot;

	erp.slot_time = bss_conf->use_short_slot ? SHORT_SLOT_TIME : SLOT_TIME;
	erp.sifs = SIFS;
	erp.pifs = bss_conf->use_short_slot ? SHORT_PIFS : PIFS;
	erp.difs = bss_conf->use_short_slot ? SHORT_DIFS : DIFS;
	erp.eifs = bss_conf->use_short_slot ? SHORT_EIFS : EIFS;

	erp.ack_timeout = PLCP + erp.difs + GET_DURATION(ACK_SIZE, 10);
	erp.ack_consume_time = SIFS + PLCP + GET_DURATION(ACK_SIZE, 10);

	if (bss_conf->use_short_preamble) {
		erp.ack_timeout += SHORT_PREAMBLE;
		erp.ack_consume_time += SHORT_PREAMBLE;
	} else {
		erp.ack_timeout += PREAMBLE;
		erp.ack_consume_time += PREAMBLE;
	}

	erp.basic_rates = bss_conf->basic_rates;

	rt2x00dev->ops->lib->config_erp(rt2x00dev, &erp);
}

static inline
enum antenna rt2x00lib_config_antenna_check(enum antenna current_ant,
					    enum antenna default_ant)
{
	if (current_ant != ANTENNA_SW_DIVERSITY)
		return current_ant;
	return (default_ant != ANTENNA_SW_DIVERSITY) ? default_ant : ANTENNA_B;
}

void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
			      struct antenna_setup *ant)
{
	struct antenna_setup *def = &rt2x00dev->default_ant;
	struct antenna_setup *active = &rt2x00dev->link.ant.active;

	/*
	 * Failsafe: Make sure we are not sending the
	 * ANTENNA_SW_DIVERSITY state to the driver.
	 * If that happes fallback to hardware default,
	 * or our own default.
	 * The calls to rt2x00lib_config_antenna_check()
	 * might have caused that we restore back to the already
	 * active setting. If that has happened we can quit.
	 */
	ant->rx = rt2x00lib_config_antenna_check(ant->rx, def->rx);
	ant->tx = rt2x00lib_config_antenna_check(ant->tx, def->tx);

	if (ant->rx == active->rx && ant->tx == active->tx)
		return;

	/*
	 * Antenna setup changes require the RX to be disabled,
	 * else the changes will be ignored by the device.
	 */
	if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
		rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF_LINK);

	/*
	 * Write new antenna setup to device and reset the link tuner.
	 * The latter is required since we need to recalibrate the
	 * noise-sensitivity ratio for the new setup.
	 */
	rt2x00dev->ops->lib->config_ant(rt2x00dev, ant);

	rt2x00lib_reset_link_tuner(rt2x00dev);
	rt2x00_reset_link_ant_rssi(&rt2x00dev->link);

	memcpy(active, ant, sizeof(*ant));

	if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
		rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON_LINK);
}

void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
		      struct ieee80211_conf *conf,
		      unsigned int ieee80211_flags)
{
	struct rt2x00lib_conf libconf;

	memset(&libconf, 0, sizeof(libconf));

	libconf.conf = conf;

	if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL) {
		memcpy(&libconf.rf,
		       &rt2x00dev->spec.channels[conf->channel->hw_value],
		       sizeof(libconf.rf));

		memcpy(&libconf.channel,
		       &rt2x00dev->spec.channels_info[conf->channel->hw_value],
		       sizeof(libconf.channel));
	}

	/*
	 * Start configuration.
	 */
	rt2x00dev->ops->lib->config(rt2x00dev, &libconf, ieee80211_flags);

	/*
	 * Some configuration changes affect the link quality
	 * which means we need to reset the link tuner.
	 */
	if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL)
		rt2x00lib_reset_link_tuner(rt2x00dev);

	rt2x00dev->curr_band = conf->channel->band;
	rt2x00dev->tx_power = conf->power_level;
	rt2x00dev->short_retry = conf->short_frame_max_tx_count;
	rt2x00dev->long_retry = conf->long_frame_max_tx_count;

	rt2x00dev->rx_status.band = conf->channel->band;
	rt2x00dev->rx_status.freq = conf->channel->center_freq;
}