1
2 /*
3 * Radio tuning for GCT GRF5101 on RTL8180
4 *
5 * Copyright 2007 Andrea Merello <andreamrl@tiscali.it>
6 *
7 * Code from the BSD driver and the rtl8181 project have been
8 * very useful to understand certain things
9 *
10 * I want to thanks the Authors of such projects and the Ndiswrapper
11 * project Authors.
12 *
13 * A special Big Thanks also is for all people who donated me cards,
14 * making possible the creation of the original rtl8180 driver
15 * from which this code is derived!
16 *
17 * This program is free software; you can redistribute it and/or modify
18 * it under the terms of the GNU General Public License version 2 as
19 * published by the Free Software Foundation.
20 */
21
22 #include <linux/init.h>
23 #include <linux/pci.h>
24 #include <linux/delay.h>
25 #include <net/mac80211.h>
26
27 #include "rtl8180.h"
28 #include "grf5101.h"
29
30 static const int grf5101_encode[] = {
31 0x0, 0x8, 0x4, 0xC,
32 0x2, 0xA, 0x6, 0xE,
33 0x1, 0x9, 0x5, 0xD,
34 0x3, 0xB, 0x7, 0xF
35 };
36
write_grf5101(struct ieee80211_hw * dev,u8 addr,u32 data)37 static void write_grf5101(struct ieee80211_hw *dev, u8 addr, u32 data)
38 {
39 struct rtl8180_priv *priv = dev->priv;
40 u32 phy_config;
41
42 phy_config = grf5101_encode[(data >> 8) & 0xF];
43 phy_config |= grf5101_encode[(data >> 4) & 0xF] << 4;
44 phy_config |= grf5101_encode[data & 0xF] << 8;
45 phy_config |= grf5101_encode[(addr >> 1) & 0xF] << 12;
46 phy_config |= (addr & 1) << 16;
47 phy_config |= grf5101_encode[(data & 0xf000) >> 12] << 24;
48
49 /* MAC will bang bits to the chip */
50 phy_config |= 0x90000000;
51
52 rtl818x_iowrite32(priv,
53 (__le32 __iomem *) &priv->map->RFPinsOutput, phy_config);
54
55 msleep(3);
56 }
57
grf5101_write_phy_antenna(struct ieee80211_hw * dev,short chan)58 static void grf5101_write_phy_antenna(struct ieee80211_hw *dev, short chan)
59 {
60 struct rtl8180_priv *priv = dev->priv;
61 u8 ant = GRF5101_ANTENNA;
62
63 if (priv->rfparam & RF_PARAM_ANTBDEFAULT)
64 ant |= BB_ANTENNA_B;
65
66 if (chan == 14)
67 ant |= BB_ANTATTEN_CHAN14;
68
69 rtl8180_write_phy(dev, 0x10, ant);
70 }
71
grf5101_rf_calc_rssi(u8 agc,u8 sq)72 static u8 grf5101_rf_calc_rssi(u8 agc, u8 sq)
73 {
74 if (agc > 60)
75 return 65;
76
77 /* TODO(?): just return agc (or agc + 5) to avoid mult / div */
78 return 65 * agc / 60;
79 }
80
grf5101_rf_set_channel(struct ieee80211_hw * dev,struct ieee80211_conf * conf)81 static void grf5101_rf_set_channel(struct ieee80211_hw *dev,
82 struct ieee80211_conf *conf)
83 {
84 struct rtl8180_priv *priv = dev->priv;
85 int channel =
86 ieee80211_frequency_to_channel(conf->chandef.chan->center_freq);
87 u32 txpw = priv->channels[channel - 1].hw_value & 0xFF;
88 u32 chan = channel - 1;
89
90 /* set TX power */
91 write_grf5101(dev, 0x15, 0x0);
92 write_grf5101(dev, 0x06, txpw);
93 write_grf5101(dev, 0x15, 0x10);
94 write_grf5101(dev, 0x15, 0x0);
95
96 /* set frequency */
97 write_grf5101(dev, 0x07, 0x0);
98 write_grf5101(dev, 0x0B, chan);
99 write_grf5101(dev, 0x07, 0x1000);
100
101 grf5101_write_phy_antenna(dev, channel);
102 }
103
grf5101_rf_stop(struct ieee80211_hw * dev)104 static void grf5101_rf_stop(struct ieee80211_hw *dev)
105 {
106 struct rtl8180_priv *priv = dev->priv;
107 u32 anaparam;
108
109 anaparam = priv->anaparam;
110 anaparam &= 0x000fffff;
111 anaparam |= 0x3f900000;
112 rtl8180_set_anaparam(priv, anaparam);
113
114 write_grf5101(dev, 0x07, 0x0);
115 write_grf5101(dev, 0x1f, 0x45);
116 write_grf5101(dev, 0x1f, 0x5);
117 write_grf5101(dev, 0x00, 0x8e4);
118 }
119
grf5101_rf_init(struct ieee80211_hw * dev)120 static void grf5101_rf_init(struct ieee80211_hw *dev)
121 {
122 struct rtl8180_priv *priv = dev->priv;
123
124 rtl8180_set_anaparam(priv, priv->anaparam);
125
126 write_grf5101(dev, 0x1f, 0x0);
127 write_grf5101(dev, 0x1f, 0x0);
128 write_grf5101(dev, 0x1f, 0x40);
129 write_grf5101(dev, 0x1f, 0x60);
130 write_grf5101(dev, 0x1f, 0x61);
131 write_grf5101(dev, 0x1f, 0x61);
132 write_grf5101(dev, 0x00, 0xae4);
133 write_grf5101(dev, 0x1f, 0x1);
134 write_grf5101(dev, 0x1f, 0x41);
135 write_grf5101(dev, 0x1f, 0x61);
136
137 write_grf5101(dev, 0x01, 0x1a23);
138 write_grf5101(dev, 0x02, 0x4971);
139 write_grf5101(dev, 0x03, 0x41de);
140 write_grf5101(dev, 0x04, 0x2d80);
141 write_grf5101(dev, 0x05, 0x68ff); /* 0x61ff original value */
142 write_grf5101(dev, 0x06, 0x0);
143 write_grf5101(dev, 0x07, 0x0);
144 write_grf5101(dev, 0x08, 0x7533);
145 write_grf5101(dev, 0x09, 0xc401);
146 write_grf5101(dev, 0x0a, 0x0);
147 write_grf5101(dev, 0x0c, 0x1c7);
148 write_grf5101(dev, 0x0d, 0x29d3);
149 write_grf5101(dev, 0x0e, 0x2e8);
150 write_grf5101(dev, 0x10, 0x192);
151 write_grf5101(dev, 0x11, 0x248);
152 write_grf5101(dev, 0x12, 0x0);
153 write_grf5101(dev, 0x13, 0x20c4);
154 write_grf5101(dev, 0x14, 0xf4fc);
155 write_grf5101(dev, 0x15, 0x0);
156 write_grf5101(dev, 0x16, 0x1500);
157
158 write_grf5101(dev, 0x07, 0x1000);
159
160 /* baseband configuration */
161 rtl8180_write_phy(dev, 0, 0xa8);
162 rtl8180_write_phy(dev, 3, 0x0);
163 rtl8180_write_phy(dev, 4, 0xc0);
164 rtl8180_write_phy(dev, 5, 0x90);
165 rtl8180_write_phy(dev, 6, 0x1e);
166 rtl8180_write_phy(dev, 7, 0x64);
167
168 grf5101_write_phy_antenna(dev, 1);
169
170 rtl8180_write_phy(dev, 0x11, 0x88);
171
172 if (rtl818x_ioread8(priv, &priv->map->CONFIG2) &
173 RTL818X_CONFIG2_ANTENNA_DIV)
174 rtl8180_write_phy(dev, 0x12, 0xc0); /* enable ant diversity */
175 else
176 rtl8180_write_phy(dev, 0x12, 0x40); /* disable ant diversity */
177
178 rtl8180_write_phy(dev, 0x13, 0x90 | priv->csthreshold);
179
180 rtl8180_write_phy(dev, 0x19, 0x0);
181 rtl8180_write_phy(dev, 0x1a, 0xa0);
182 rtl8180_write_phy(dev, 0x1b, 0x44);
183 }
184
185 const struct rtl818x_rf_ops grf5101_rf_ops = {
186 .name = "GCT",
187 .init = grf5101_rf_init,
188 .stop = grf5101_rf_stop,
189 .set_chan = grf5101_rf_set_channel,
190 .calc_rssi = grf5101_rf_calc_rssi,
191 };
192