2 * Radio tuning for Maxim max2820 on RTL8180
4 * Copyright 2007 Andrea Merello <andreamrl@tiscali.it>
6 * Code from the BSD driver and the rtl8181 project have been
7 * very useful to understand certain things
9 * I want to thanks the Authors of such projects and the Ndiswrapper
12 * A special Big Thanks also is for all people who donated me cards,
13 * making possible the creation of the original rtl8180 driver
14 * from which this code is derived!
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License version 2 as
18 * published by the Free Software Foundation.
21 #include <linux/init.h>
22 #include <linux/pci.h>
23 #include <linux/delay.h>
24 #include <net/mac80211.h>
29 static const u32 max2820_chan[] = {
46 static void write_max2820(struct ieee80211_hw *dev, u8 addr, u32 data)
48 struct rtl8180_priv *priv = dev->priv;
51 phy_config = 0x90 + (data & 0xf);
55 phy_config += (data >> 4) & 0xff;
57 rtl818x_iowrite32(priv,
58 (__le32 __iomem *) &priv->map->RFPinsOutput, phy_config);
63 static void max2820_write_phy_antenna(struct ieee80211_hw *dev, short chan)
65 struct rtl8180_priv *priv = dev->priv;
69 if (priv->rfparam & RF_PARAM_ANTBDEFAULT)
72 ant |= BB_ANTATTEN_CHAN14;
74 rtl8180_write_phy(dev, 0x10, ant);
77 static u8 max2820_rf_calc_rssi(u8 agc, u8 sq)
89 /* TODO: change addends above to avoid mult / div below */
90 return 65 * agc / 100;
93 static void max2820_rf_set_channel(struct ieee80211_hw *dev,
94 struct ieee80211_conf *conf)
96 struct rtl8180_priv *priv = dev->priv;
98 ieee80211_frequency_to_channel(conf->chandef.chan->center_freq) : 1;
99 unsigned int chan_idx = channel - 1;
100 u32 txpw = priv->channels[chan_idx].hw_value & 0xFF;
101 u32 chan = max2820_chan[chan_idx];
103 /* While philips SA2400 drive the PA bias from
104 * sa2400, for MAXIM we do this directly from BB */
105 rtl8180_write_phy(dev, 3, txpw);
107 max2820_write_phy_antenna(dev, channel);
108 write_max2820(dev, 3, chan);
111 static void max2820_rf_stop(struct ieee80211_hw *dev)
113 rtl8180_write_phy(dev, 3, 0x8);
114 write_max2820(dev, 1, 0);
118 static void max2820_rf_init(struct ieee80211_hw *dev)
120 struct rtl8180_priv *priv = dev->priv;
122 /* MAXIM from netbsd driver */
123 write_max2820(dev, 0, 0x007); /* test mode as indicated in datasheet */
124 write_max2820(dev, 1, 0x01e); /* enable register */
125 write_max2820(dev, 2, 0x001); /* synt register */
127 max2820_rf_set_channel(dev, NULL);
129 write_max2820(dev, 4, 0x313); /* rx register */
131 /* PA is driven directly by the BB, we keep the MAXIM bias
132 * at the highest value in case that setting it to lower
133 * values may introduce some further attenuation somewhere..
135 write_max2820(dev, 5, 0x00f);
137 /* baseband configuration */
138 rtl8180_write_phy(dev, 0, 0x88); /* sys1 */
139 rtl8180_write_phy(dev, 3, 0x08); /* txagc */
140 rtl8180_write_phy(dev, 4, 0xf8); /* lnadet */
141 rtl8180_write_phy(dev, 5, 0x90); /* ifagcinit */
142 rtl8180_write_phy(dev, 6, 0x1a); /* ifagclimit */
143 rtl8180_write_phy(dev, 7, 0x64); /* ifagcdet */
145 max2820_write_phy_antenna(dev, 1);
147 rtl8180_write_phy(dev, 0x11, 0x88); /* trl */
149 if (rtl818x_ioread8(priv, &priv->map->CONFIG2) &
150 RTL818X_CONFIG2_ANTENNA_DIV)
151 rtl8180_write_phy(dev, 0x12, 0xc7);
153 rtl8180_write_phy(dev, 0x12, 0x47);
155 rtl8180_write_phy(dev, 0x13, 0x9b);
157 rtl8180_write_phy(dev, 0x19, 0x0); /* CHESTLIM */
158 rtl8180_write_phy(dev, 0x1a, 0x9f); /* CHSQLIM */
160 max2820_rf_set_channel(dev, NULL);
163 const struct rtl818x_rf_ops max2820_rf_ops = {
165 .init = max2820_rf_init,
166 .stop = max2820_rf_stop,
167 .set_chan = max2820_rf_set_channel,
168 .calc_rssi = max2820_rf_calc_rssi,