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
write_sa2400(struct net80211_device * dev,u8 addr,u32 data)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
sa2400_write_phy_antenna(struct net80211_device * dev,short chan)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
sa2400_rf_set_channel(struct net80211_device * dev,struct net80211_channel * channelp)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
sa2400_rf_stop(struct net80211_device * dev)110 static void sa2400_rf_stop(struct net80211_device *dev)
111 {
112 write_sa2400(dev, 4, 0);
113 }
114
sa2400_rf_init(struct net80211_device * dev)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 };
218