[rtl818x] Add driver for Realtek 8180/8185 wireless cards
[people/oremanj/gpxe.git] / src / drivers / net / rtl818x / rtl8180_sa2400.c
1 /*
2  * Radio tuning for Philips SA2400 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 SA2400_ANTENNA 0x91
32 #define SA2400_DIG_ANAPARAM_PWR1_ON 0x8
33 #define SA2400_ANA_ANAPARAM_PWR1_ON 0x28
34 #define SA2400_ANAPARAM_PWR0_ON 0x3
35
36 /* RX sensitivity in dbm */
37 #define SA2400_MAX_SENS 85
38
39 #define SA2400_REG4_FIRDAC_SHIFT 7
40
41 static const u32 sa2400_chan[] = {
42         0x00096c, /* ch1 */
43         0x080970,
44         0x100974,
45         0x180978,
46         0x000980,
47         0x080984,
48         0x100988,
49         0x18098c,
50         0x000994,
51         0x080998,
52         0x10099c,
53         0x1809a0,
54         0x0009a8,
55         0x0009b4, /* ch 14 */
56 };
57
58 static void write_sa2400(struct net80211_device *dev, u8 addr, u32 data)
59 {
60         struct rtl818x_priv *priv = dev->priv;
61         u32 phy_config;
62
63         /* MAC will bang bits to the sa2400. sw 3-wire is NOT used */
64         phy_config = 0xb0000000;
65
66         phy_config |= ((u32)(addr & 0xf)) << 24;
67         phy_config |= data & 0xffffff;
68
69         /* This was originally a 32-bit write to a typecast
70            RFPinsOutput, but gcc complained about aliasing rules. -JBO */
71         rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, phy_config & 0xffff);
72         rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, phy_config >> 16);
73
74         mdelay(3);
75 }
76
77 static void sa2400_write_phy_antenna(struct net80211_device *dev, short chan)
78 {
79         struct rtl818x_priv *priv = dev->priv;
80         u8 ant = SA2400_ANTENNA;
81
82         if (priv->rfparam & RF_PARAM_ANTBDEFAULT)
83                 ant |= BB_ANTENNA_B;
84
85         if (chan == 14)
86                 ant |= BB_ANTATTEN_CHAN14;
87
88         rtl818x_write_phy(dev, 0x10, ant);
89
90 }
91
92 static void sa2400_rf_set_channel(struct net80211_device *dev,
93                                   struct net80211_channel *channelp)
94 {
95         struct rtl818x_priv *priv = dev->priv;
96         int channel = channelp->channel_nr;
97         u32 txpw = priv->txpower[channel - 1] & 0xFF;
98         u32 chan = sa2400_chan[channel - 1];
99
100         write_sa2400(dev, 7, txpw);
101
102         sa2400_write_phy_antenna(dev, channel);
103
104         write_sa2400(dev, 0, chan);
105         write_sa2400(dev, 1, 0xbb50);
106         write_sa2400(dev, 2, 0x80);
107         write_sa2400(dev, 3, 0);
108 }
109
110 static void sa2400_rf_stop(struct net80211_device *dev)
111 {
112         write_sa2400(dev, 4, 0);
113 }
114
115 static void sa2400_rf_init(struct net80211_device *dev)
116 {
117         struct rtl818x_priv *priv = dev->priv;
118         u32 anaparam, txconf;
119         u8 firdac;
120         int analogphy = priv->rfparam & RF_PARAM_ANALOGPHY;
121
122         anaparam = priv->anaparam;
123         anaparam &= ~(1 << ANAPARAM_TXDACOFF_SHIFT);
124         anaparam &= ~ANAPARAM_PWR1_MASK;
125         anaparam &= ~ANAPARAM_PWR0_MASK;
126
127         if (analogphy) {
128                 anaparam |= SA2400_ANA_ANAPARAM_PWR1_ON << ANAPARAM_PWR1_SHIFT;
129                 firdac = 0;
130         } else {
131                 anaparam |= (SA2400_DIG_ANAPARAM_PWR1_ON << ANAPARAM_PWR1_SHIFT);
132                 anaparam |= (SA2400_ANAPARAM_PWR0_ON << ANAPARAM_PWR0_SHIFT);
133                 firdac = 1 << SA2400_REG4_FIRDAC_SHIFT;
134         }
135
136         rtl818x_set_anaparam(priv, anaparam);
137
138         write_sa2400(dev, 0, sa2400_chan[0]);
139         write_sa2400(dev, 1, 0xbb50);
140         write_sa2400(dev, 2, 0x80);
141         write_sa2400(dev, 3, 0);
142         write_sa2400(dev, 4, 0x19340 | firdac);
143         write_sa2400(dev, 5, 0x1dfb | (SA2400_MAX_SENS - 54) << 15);
144         write_sa2400(dev, 4, 0x19348 | firdac); /* calibrate VCO */
145
146         if (!analogphy)
147                 write_sa2400(dev, 4, 0x1938c); /*???*/
148
149         write_sa2400(dev, 4, 0x19340 | firdac);
150
151         write_sa2400(dev, 0, sa2400_chan[0]);
152         write_sa2400(dev, 1, 0xbb50);
153         write_sa2400(dev, 2, 0x80);
154         write_sa2400(dev, 3, 0);
155         write_sa2400(dev, 4, 0x19344 | firdac); /* calibrate filter */
156
157         /* new from rtl8180 embedded driver (rtl8181 project) */
158         write_sa2400(dev, 6, 0x13ff | (1 << 23)); /* MANRX */
159         write_sa2400(dev, 8, 0); /* VCO */
160
161         if (analogphy) {
162                 rtl818x_set_anaparam(priv, anaparam |
163                                      (1 << ANAPARAM_TXDACOFF_SHIFT));
164
165                 txconf = rtl818x_ioread32(priv, &priv->map->TX_CONF);
166                 rtl818x_iowrite32(priv, &priv->map->TX_CONF,
167                         txconf | RTL818X_TX_CONF_LOOPBACK_CONT);
168
169                 write_sa2400(dev, 4, 0x19341); /* calibrates DC */
170
171                 /* a 5us delay is required here,
172                  * we rely on the 3ms delay introduced in write_sa2400 */
173
174                 write_sa2400(dev, 4, 0x19345);
175
176                 /* a 20us delay is required here,
177                  * we rely on the 3ms delay introduced in write_sa2400 */
178
179                 rtl818x_iowrite32(priv, &priv->map->TX_CONF, txconf);
180
181                 rtl818x_set_anaparam(priv, anaparam);
182         }
183         /* end new code */
184
185         write_sa2400(dev, 4, 0x19341 | firdac); /* RTX MODE */
186
187         /* baseband configuration */
188         rtl818x_write_phy(dev, 0, 0x98);
189         rtl818x_write_phy(dev, 3, 0x38);
190         rtl818x_write_phy(dev, 4, 0xe0);
191         rtl818x_write_phy(dev, 5, 0x90);
192         rtl818x_write_phy(dev, 6, 0x1a);
193         rtl818x_write_phy(dev, 7, 0x64);
194
195         sa2400_write_phy_antenna(dev, 1);
196
197         rtl818x_write_phy(dev, 0x11, 0x80);
198
199         if (rtl818x_ioread8(priv, &priv->map->CONFIG2) &
200             RTL818X_CONFIG2_ANTENNA_DIV)
201                 rtl818x_write_phy(dev, 0x12, 0xc7); /* enable ant diversity */
202         else
203                 rtl818x_write_phy(dev, 0x12, 0x47); /* disable ant diversity */
204
205         rtl818x_write_phy(dev, 0x13, 0x90 | priv->csthreshold);
206
207         rtl818x_write_phy(dev, 0x19, 0x0);
208         rtl818x_write_phy(dev, 0x1a, 0xa0);
209 }
210
211 struct rtl818x_rf_ops sa2400_rf_ops __rtl818x_rf_driver = {
212         .name           = "Philips SA2400",
213         .id             = 3,
214         .init           = sa2400_rf_init,
215         .stop           = sa2400_rf_stop,
216         .set_chan       = sa2400_rf_set_channel
217 };