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
|
/*
* Radio tuning for Maxim max2820 on RTL8180
*
* Copyright 2007 Andrea Merello <andreamrl@tiscali.it>
*
* Code from the BSD driver and the rtl8181 project have been
* very useful to understand certain things
*
* I want to thanks the Authors of such projects and the Ndiswrapper
* project Authors.
*
* A special Big Thanks also is for all people who donated me cards,
* making possible the creation of the original rtl8180 driver
* from which this code is derived!
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <net/mac80211.h>
#include "rtl8180.h"
#include "rtl8180_max2820.h"
static const u32 max2820_chan[] = {
12, /* CH 1 */
17,
22,
27,
32,
37,
42,
47,
52,
57,
62,
67,
72,
84, /* CH 14 */
};
static void write_max2820(struct ieee80211_hw *dev, u8 addr, u32 data)
{
struct rtl8180_priv *priv = dev->priv;
u32 phy_config;
phy_config = 0x90 + (data & 0xf);
phy_config <<= 16;
phy_config += addr;
phy_config <<= 8;
phy_config += (data >> 4) & 0xff;
rtl818x_iowrite32(priv,
(__le32 __iomem *) &priv->map->RFPinsOutput, phy_config);
msleep(1);
}
static void max2820_write_phy_antenna(struct ieee80211_hw *dev, short chan)
{
struct rtl8180_priv *priv = dev->priv;
u8 ant;
ant = MAXIM_ANTENNA;
if (priv->rfparam & RF_PARAM_ANTBDEFAULT)
ant |= BB_ANTENNA_B;
if (chan == 14)
ant |= BB_ANTATTEN_CHAN14;
rtl8180_write_phy(dev, 0x10, ant);
}
static u8 max2820_rf_calc_rssi(u8 agc, u8 sq)
{
bool odd;
odd = !!(agc & 1);
agc >>= 1;
if (odd)
agc += 76;
else
agc += 66;
/* TODO: change addends above to avoid mult / div below */
return 65 * agc / 100;
}
static void max2820_rf_set_channel(struct ieee80211_hw *dev,
struct ieee80211_conf *conf)
{
struct rtl8180_priv *priv = dev->priv;
int channel = conf ?
ieee80211_frequency_to_channel(conf->channel->center_freq) : 1;
unsigned int chan_idx = channel - 1;
u32 txpw = priv->channels[chan_idx].hw_value & 0xFF;
u32 chan = max2820_chan[chan_idx];
/* While philips SA2400 drive the PA bias from
* sa2400, for MAXIM we do this directly from BB */
rtl8180_write_phy(dev, 3, txpw);
max2820_write_phy_antenna(dev, channel);
write_max2820(dev, 3, chan);
}
static void max2820_rf_stop(struct ieee80211_hw *dev)
{
rtl8180_write_phy(dev, 3, 0x8);
write_max2820(dev, 1, 0);
}
static void max2820_rf_init(struct ieee80211_hw *dev)
{
struct rtl8180_priv *priv = dev->priv;
/* MAXIM from netbsd driver */
write_max2820(dev, 0, 0x007); /* test mode as indicated in datasheet */
write_max2820(dev, 1, 0x01e); /* enable register */
write_max2820(dev, 2, 0x001); /* synt register */
max2820_rf_set_channel(dev, NULL);
write_max2820(dev, 4, 0x313); /* rx register */
/* PA is driven directly by the BB, we keep the MAXIM bias
* at the highest value in case that setting it to lower
* values may introduce some further attenuation somewhere..
*/
write_max2820(dev, 5, 0x00f);
/* baseband configuration */
rtl8180_write_phy(dev, 0, 0x88); /* sys1 */
rtl8180_write_phy(dev, 3, 0x08); /* txagc */
rtl8180_write_phy(dev, 4, 0xf8); /* lnadet */
rtl8180_write_phy(dev, 5, 0x90); /* ifagcinit */
rtl8180_write_phy(dev, 6, 0x1a); /* ifagclimit */
rtl8180_write_phy(dev, 7, 0x64); /* ifagcdet */
max2820_write_phy_antenna(dev, 1);
rtl8180_write_phy(dev, 0x11, 0x88); /* trl */
if (rtl818x_ioread8(priv, &priv->map->CONFIG2) &
RTL818X_CONFIG2_ANTENNA_DIV)
rtl8180_write_phy(dev, 0x12, 0xc7);
else
rtl8180_write_phy(dev, 0x12, 0x47);
rtl8180_write_phy(dev, 0x13, 0x9b);
rtl8180_write_phy(dev, 0x19, 0x0); /* CHESTLIM */
rtl8180_write_phy(dev, 0x1a, 0x9f); /* CHSQLIM */
max2820_rf_set_channel(dev, NULL);
}
const struct rtl818x_rf_ops max2820_rf_ops = {
.name = "Maxim",
.init = max2820_rf_init,
.stop = max2820_rf_stop,
.set_chan = max2820_rf_set_channel,
.calc_rssi = max2820_rf_calc_rssi,
};
|
