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