1 2 /* 3 * Radio tuning for Philips SA2400 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 "sa2400.h" 28 29 static const u32 sa2400_chan[] = { 30 0x00096c, /* ch1 */ 31 0x080970, 32 0x100974, 33 0x180978, 34 0x000980, 35 0x080984, 36 0x100988, 37 0x18098c, 38 0x000994, 39 0x080998, 40 0x10099c, 41 0x1809a0, 42 0x0009a8, 43 0x0009b4, /* ch 14 */ 44 }; 45 46 static void write_sa2400(struct ieee80211_hw *dev, u8 addr, u32 data) 47 { 48 struct rtl8180_priv *priv = dev->priv; 49 u32 phy_config; 50 51 /* MAC will bang bits to the sa2400. sw 3-wire is NOT used */ 52 phy_config = 0xb0000000; 53 54 phy_config |= ((u32)(addr & 0xf)) << 24; 55 phy_config |= data & 0xffffff; 56 57 rtl818x_iowrite32(priv, 58 (__le32 __iomem *) &priv->map->RFPinsOutput, phy_config); 59 60 msleep(3); 61 } 62 63 static void sa2400_write_phy_antenna(struct ieee80211_hw *dev, short chan) 64 { 65 struct rtl8180_priv *priv = dev->priv; 66 u8 ant = SA2400_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 rtl8180_write_phy(dev, 0x10, ant); 75 76 } 77 78 static u8 sa2400_rf_rssi_map[] = { 79 0x64, 0x64, 0x63, 0x62, 0x61, 0x60, 0x5f, 0x5e, 80 0x5d, 0x5c, 0x5b, 0x5a, 0x57, 0x54, 0x52, 0x50, 81 0x4e, 0x4c, 0x4a, 0x48, 0x46, 0x44, 0x41, 0x3f, 82 0x3c, 0x3a, 0x37, 0x36, 0x36, 0x1c, 0x1c, 0x1b, 83 0x1b, 0x1a, 0x1a, 0x19, 0x19, 0x18, 0x18, 0x17, 84 0x17, 0x16, 0x16, 0x15, 0x15, 0x14, 0x14, 0x13, 85 0x13, 0x12, 0x12, 0x11, 0x11, 0x10, 0x10, 0x0f, 86 0x0f, 0x0e, 0x0e, 0x0d, 0x0d, 0x0c, 0x0c, 0x0b, 87 0x0b, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x07, 88 0x07, 0x06, 0x06, 0x05, 0x04, 0x03, 0x02, 89 }; 90 91 static u8 sa2400_rf_calc_rssi(u8 agc, u8 sq) 92 { 93 if (sq == 0x80) 94 return 1; 95 96 if (sq > 78) 97 return 32; 98 99 /* TODO: recalc sa2400_rf_rssi_map to avoid mult / div */ 100 return 65 * sa2400_rf_rssi_map[sq] / 100; 101 } 102 103 static void sa2400_rf_set_channel(struct ieee80211_hw *dev, 104 struct ieee80211_conf *conf) 105 { 106 struct rtl8180_priv *priv = dev->priv; 107 int channel = 108 ieee80211_frequency_to_channel(conf->chandef.chan->center_freq); 109 u32 txpw = priv->channels[channel - 1].hw_value & 0xFF; 110 u32 chan = sa2400_chan[channel - 1]; 111 112 write_sa2400(dev, 7, txpw); 113 114 sa2400_write_phy_antenna(dev, channel); 115 116 write_sa2400(dev, 0, chan); 117 write_sa2400(dev, 1, 0xbb50); 118 write_sa2400(dev, 2, 0x80); 119 write_sa2400(dev, 3, 0); 120 } 121 122 static void sa2400_rf_stop(struct ieee80211_hw *dev) 123 { 124 write_sa2400(dev, 4, 0); 125 } 126 127 static void sa2400_rf_init(struct ieee80211_hw *dev) 128 { 129 struct rtl8180_priv *priv = dev->priv; 130 u32 anaparam, txconf; 131 u8 firdac; 132 int analogphy = priv->rfparam & RF_PARAM_ANALOGPHY; 133 134 anaparam = priv->anaparam; 135 anaparam &= ~(1 << ANAPARAM_TXDACOFF_SHIFT); 136 anaparam &= ~ANAPARAM_PWR1_MASK; 137 anaparam &= ~ANAPARAM_PWR0_MASK; 138 139 if (analogphy) { 140 anaparam |= SA2400_ANA_ANAPARAM_PWR1_ON << ANAPARAM_PWR1_SHIFT; 141 firdac = 0; 142 } else { 143 anaparam |= (SA2400_DIG_ANAPARAM_PWR1_ON << ANAPARAM_PWR1_SHIFT); 144 anaparam |= (SA2400_ANAPARAM_PWR0_ON << ANAPARAM_PWR0_SHIFT); 145 firdac = 1 << SA2400_REG4_FIRDAC_SHIFT; 146 } 147 148 rtl8180_set_anaparam(priv, anaparam); 149 150 write_sa2400(dev, 0, sa2400_chan[0]); 151 write_sa2400(dev, 1, 0xbb50); 152 write_sa2400(dev, 2, 0x80); 153 write_sa2400(dev, 3, 0); 154 write_sa2400(dev, 4, 0x19340 | firdac); 155 write_sa2400(dev, 5, 0x1dfb | (SA2400_MAX_SENS - 54) << 15); 156 write_sa2400(dev, 4, 0x19348 | firdac); /* calibrate VCO */ 157 158 if (!analogphy) 159 write_sa2400(dev, 4, 0x1938c); /*???*/ 160 161 write_sa2400(dev, 4, 0x19340 | firdac); 162 163 write_sa2400(dev, 0, sa2400_chan[0]); 164 write_sa2400(dev, 1, 0xbb50); 165 write_sa2400(dev, 2, 0x80); 166 write_sa2400(dev, 3, 0); 167 write_sa2400(dev, 4, 0x19344 | firdac); /* calibrate filter */ 168 169 /* new from rtl8180 embedded driver (rtl8181 project) */ 170 write_sa2400(dev, 6, 0x13ff | (1 << 23)); /* MANRX */ 171 write_sa2400(dev, 8, 0); /* VCO */ 172 173 if (analogphy) { 174 rtl8180_set_anaparam(priv, anaparam | 175 (1 << ANAPARAM_TXDACOFF_SHIFT)); 176 177 txconf = rtl818x_ioread32(priv, &priv->map->TX_CONF); 178 rtl818x_iowrite32(priv, &priv->map->TX_CONF, 179 txconf | RTL818X_TX_CONF_LOOPBACK_CONT); 180 181 write_sa2400(dev, 4, 0x19341); /* calibrates DC */ 182 183 /* a 5us sleep is required here, 184 * we rely on the 3ms delay introduced in write_sa2400 */ 185 write_sa2400(dev, 4, 0x19345); 186 187 /* a 20us sleep is required here, 188 * we rely on the 3ms delay introduced in write_sa2400 */ 189 190 rtl818x_iowrite32(priv, &priv->map->TX_CONF, txconf); 191 192 rtl8180_set_anaparam(priv, anaparam); 193 } 194 /* end new code */ 195 196 write_sa2400(dev, 4, 0x19341 | firdac); /* RTX MODE */ 197 198 /* baseband configuration */ 199 rtl8180_write_phy(dev, 0, 0x98); 200 rtl8180_write_phy(dev, 3, 0x38); 201 rtl8180_write_phy(dev, 4, 0xe0); 202 rtl8180_write_phy(dev, 5, 0x90); 203 rtl8180_write_phy(dev, 6, 0x1a); 204 rtl8180_write_phy(dev, 7, 0x64); 205 206 sa2400_write_phy_antenna(dev, 1); 207 208 rtl8180_write_phy(dev, 0x11, 0x80); 209 210 if (rtl818x_ioread8(priv, &priv->map->CONFIG2) & 211 RTL818X_CONFIG2_ANTENNA_DIV) 212 rtl8180_write_phy(dev, 0x12, 0xc7); /* enable ant diversity */ 213 else 214 rtl8180_write_phy(dev, 0x12, 0x47); /* disable ant diversity */ 215 216 rtl8180_write_phy(dev, 0x13, 0x90 | priv->csthreshold); 217 218 rtl8180_write_phy(dev, 0x19, 0x0); 219 rtl8180_write_phy(dev, 0x1a, 0xa0); 220 } 221 222 const struct rtl818x_rf_ops sa2400_rf_ops = { 223 .name = "Philips", 224 .init = sa2400_rf_init, 225 .stop = sa2400_rf_stop, 226 .set_chan = sa2400_rf_set_channel, 227 .calc_rssi = sa2400_rf_calc_rssi, 228 }; 229