[rtl818x] Add driver for Realtek 8180/8185 wireless cards
[people/oremanj/gpxe.git] / src / drivers / net / rtl818x / rtl8180_grf5101.c
1 /*
2  * Radio tuning for GCT GRF5101 on RTL8180
3  *
4  * Copyright 2007 Andrea Merello <andreamrl@tiscali.it>
5  *
6  * Modified slightly for gPXE, June 2009 by Joshua Oreman.
7  *
8  * Code from the BSD driver and the rtl8181 project have been
9  * very useful to understand certain things
10  *
11  * I want to thanks the Authors of such projects and the Ndiswrapper
12  * project Authors.
13  *
14  * A special Big Thanks also is for all people who donated me cards,
15  * making possible the creation of the original rtl8180 driver
16  * from which this code is derived!
17  *
18  * This program is free software; you can redistribute it and/or modify
19  * it under the terms of the GNU General Public License version 2 as
20  * published by the Free Software Foundation.
21  */
22
23 #include <unistd.h>
24 #include <gpxe/pci.h>
25 #include <gpxe/net80211.h>
26
27 #include "rtl818x.h"
28
29 FILE_LICENCE(GPL2_ONLY);
30
31 #define GRF5101_ANTENNA 0xA3
32
33 static const int grf5101_encode[] = {
34         0x0, 0x8, 0x4, 0xC,
35         0x2, 0xA, 0x6, 0xE,
36         0x1, 0x9, 0x5, 0xD,
37         0x3, 0xB, 0x7, 0xF
38 };
39
40 static void write_grf5101(struct net80211_device *dev, u8 addr, u32 data)
41 {
42         struct rtl818x_priv *priv = dev->priv;
43         u32 phy_config;
44
45         phy_config =  grf5101_encode[(data >> 8) & 0xF];
46         phy_config |= grf5101_encode[(data >> 4) & 0xF] << 4;
47         phy_config |= grf5101_encode[data & 0xF] << 8;
48         phy_config |= grf5101_encode[(addr >> 1) & 0xF] << 12;
49         phy_config |= (addr & 1) << 16;
50         phy_config |= grf5101_encode[(data & 0xf000) >> 12] << 24;
51
52         /* MAC will bang bits to the chip */
53         phy_config |= 0x90000000;
54
55         /* This was originally a 32-bit write to a typecast
56            RFPinsOutput, but gcc complained about aliasing rules. -JBO */
57         rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, phy_config & 0xffff);
58         rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, phy_config >> 16);
59
60         mdelay(3);
61 }
62
63 static void grf5101_write_phy_antenna(struct net80211_device *dev, short chan)
64 {
65         struct rtl818x_priv *priv = dev->priv;
66         u8 ant = GRF5101_ANTENNA;
67
68         if (priv->rfparam & RF_PARAM_ANTBDEFAULT)
69                 ant |= BB_ANTENNA_B;
70
71         if (chan == 14)
72                 ant |= BB_ANTATTEN_CHAN14;
73
74         rtl818x_write_phy(dev, 0x10, ant);
75 }
76
77 static void grf5101_rf_set_channel(struct net80211_device *dev,
78                                    struct net80211_channel *channelp)
79 {
80         struct rtl818x_priv *priv = dev->priv;
81         int channel = channelp->channel_nr;
82         u32 txpw = priv->txpower[channel - 1] & 0xFF;
83         u32 chan = channel - 1;
84
85         /* set TX power */
86         write_grf5101(dev, 0x15, 0x0);
87         write_grf5101(dev, 0x06, txpw);
88         write_grf5101(dev, 0x15, 0x10);
89         write_grf5101(dev, 0x15, 0x0);
90
91         /* set frequency */
92         write_grf5101(dev, 0x07, 0x0);
93         write_grf5101(dev, 0x0B, chan);
94         write_grf5101(dev, 0x07, 0x1000);
95
96         grf5101_write_phy_antenna(dev, channel);
97 }
98
99 static void grf5101_rf_stop(struct net80211_device *dev)
100 {
101         struct rtl818x_priv *priv = dev->priv;
102         u32 anaparam;
103
104         anaparam = priv->anaparam;
105         anaparam &= 0x000fffff;
106         anaparam |= 0x3f900000;
107         rtl818x_set_anaparam(priv, anaparam);
108
109         write_grf5101(dev, 0x07, 0x0);
110         write_grf5101(dev, 0x1f, 0x45);
111         write_grf5101(dev, 0x1f, 0x5);
112         write_grf5101(dev, 0x00, 0x8e4);
113 }
114
115 static void grf5101_rf_init(struct net80211_device *dev)
116 {
117         struct rtl818x_priv *priv = dev->priv;
118
119         rtl818x_set_anaparam(priv, priv->anaparam);
120
121         write_grf5101(dev, 0x1f, 0x0);
122         write_grf5101(dev, 0x1f, 0x0);
123         write_grf5101(dev, 0x1f, 0x40);
124         write_grf5101(dev, 0x1f, 0x60);
125         write_grf5101(dev, 0x1f, 0x61);
126         write_grf5101(dev, 0x1f, 0x61);
127         write_grf5101(dev, 0x00, 0xae4);
128         write_grf5101(dev, 0x1f, 0x1);
129         write_grf5101(dev, 0x1f, 0x41);
130         write_grf5101(dev, 0x1f, 0x61);
131
132         write_grf5101(dev, 0x01, 0x1a23);
133         write_grf5101(dev, 0x02, 0x4971);
134         write_grf5101(dev, 0x03, 0x41de);
135         write_grf5101(dev, 0x04, 0x2d80);
136         write_grf5101(dev, 0x05, 0x68ff);       /* 0x61ff original value */
137         write_grf5101(dev, 0x06, 0x0);
138         write_grf5101(dev, 0x07, 0x0);
139         write_grf5101(dev, 0x08, 0x7533);
140         write_grf5101(dev, 0x09, 0xc401);
141         write_grf5101(dev, 0x0a, 0x0);
142         write_grf5101(dev, 0x0c, 0x1c7);
143         write_grf5101(dev, 0x0d, 0x29d3);
144         write_grf5101(dev, 0x0e, 0x2e8);
145         write_grf5101(dev, 0x10, 0x192);
146         write_grf5101(dev, 0x11, 0x248);
147         write_grf5101(dev, 0x12, 0x0);
148         write_grf5101(dev, 0x13, 0x20c4);
149         write_grf5101(dev, 0x14, 0xf4fc);
150         write_grf5101(dev, 0x15, 0x0);
151         write_grf5101(dev, 0x16, 0x1500);
152
153         write_grf5101(dev, 0x07, 0x1000);
154
155         /* baseband configuration */
156         rtl818x_write_phy(dev, 0, 0xa8);
157         rtl818x_write_phy(dev, 3, 0x0);
158         rtl818x_write_phy(dev, 4, 0xc0);
159         rtl818x_write_phy(dev, 5, 0x90);
160         rtl818x_write_phy(dev, 6, 0x1e);
161         rtl818x_write_phy(dev, 7, 0x64);
162
163         grf5101_write_phy_antenna(dev, 1);
164
165         rtl818x_write_phy(dev, 0x11, 0x88);
166
167         if (rtl818x_ioread8(priv, &priv->map->CONFIG2) &
168             RTL818X_CONFIG2_ANTENNA_DIV)
169                 rtl818x_write_phy(dev, 0x12, 0xc0); /* enable ant diversity */
170         else
171                 rtl818x_write_phy(dev, 0x12, 0x40); /* disable ant diversity */
172
173         rtl818x_write_phy(dev, 0x13, 0x90 | priv->csthreshold);
174
175         rtl818x_write_phy(dev, 0x19, 0x0);
176         rtl818x_write_phy(dev, 0x1a, 0xa0);
177         rtl818x_write_phy(dev, 0x1b, 0x44);
178 }
179
180 struct rtl818x_rf_ops grf5101_rf_ops __rtl818x_rf_driver = {
181         .name           = "GCT GRF5101",
182         .id             = 5,
183         .init           = grf5101_rf_init,
184         .stop           = grf5101_rf_stop,
185         .set_chan       = grf5101_rf_set_channel
186 };