1 // SPDX-License-Identifier: GPL-2.0-only 2 3 /* 4 * Radio tuning for Philips SA2400 on RTL8180 5 * 6 * Copyright 2007 Andrea Merello <andrea.merello@gmail.com> 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 19 #include <linux/pci.h> 20 #include <linux/delay.h> 21 #include <net/mac80211.h> 22 23 #include "rtl8180.h" 24 #include "sa2400.h" 25 26 static const u32 sa2400_chan[] = { 27 0x00096c, /* ch1 */ 28 0x080970, 29 0x100974, 30 0x180978, 31 0x000980, 32 0x080984, 33 0x100988, 34 0x18098c, 35 0x000994, 36 0x080998, 37 0x10099c, 38 0x1809a0, 39 0x0009a8, 40 0x0009b4, /* ch 14 */ 41 }; 42 43 static void write_sa2400(struct ieee80211_hw *dev, u8 addr, u32 data) 44 { 45 struct rtl8180_priv *priv = dev->priv; 46 u32 phy_config; 47 48 /* MAC will bang bits to the sa2400. sw 3-wire is NOT used */ 49 phy_config = 0xb0000000; 50 51 phy_config |= ((u32)(addr & 0xf)) << 24; 52 phy_config |= data & 0xffffff; 53 54 rtl818x_iowrite32(priv, 55 (__le32 __iomem *) &priv->map->RFPinsOutput, phy_config); 56 57 msleep(3); 58 } 59 60 static void sa2400_write_phy_antenna(struct ieee80211_hw *dev, short chan) 61 { 62 struct rtl8180_priv *priv = dev->priv; 63 u8 ant = SA2400_ANTENNA; 64 65 if (priv->rfparam & RF_PARAM_ANTBDEFAULT) 66 ant |= BB_ANTENNA_B; 67 68 if (chan == 14) 69 ant |= BB_ANTATTEN_CHAN14; 70 71 rtl8180_write_phy(dev, 0x10, ant); 72 73 } 74 75 static u8 sa2400_rf_rssi_map[] = { 76 0x64, 0x64, 0x63, 0x62, 0x61, 0x60, 0x5f, 0x5e, 77 0x5d, 0x5c, 0x5b, 0x5a, 0x57, 0x54, 0x52, 0x50, 78 0x4e, 0x4c, 0x4a, 0x48, 0x46, 0x44, 0x41, 0x3f, 79 0x3c, 0x3a, 0x37, 0x36, 0x36, 0x1c, 0x1c, 0x1b, 80 0x1b, 0x1a, 0x1a, 0x19, 0x19, 0x18, 0x18, 0x17, 81 0x17, 0x16, 0x16, 0x15, 0x15, 0x14, 0x14, 0x13, 82 0x13, 0x12, 0x12, 0x11, 0x11, 0x10, 0x10, 0x0f, 83 0x0f, 0x0e, 0x0e, 0x0d, 0x0d, 0x0c, 0x0c, 0x0b, 84 0x0b, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x07, 85 0x07, 0x06, 0x06, 0x05, 0x04, 0x03, 0x02, 86 }; 87 88 static u8 sa2400_rf_calc_rssi(u8 agc, u8 sq) 89 { 90 if (sq == 0x80) 91 return 1; 92 93 if (sq > 78) 94 return 32; 95 96 /* TODO: recalc sa2400_rf_rssi_map to avoid mult / div */ 97 return 65 * sa2400_rf_rssi_map[sq] / 100; 98 } 99 100 static void sa2400_rf_set_channel(struct ieee80211_hw *dev, 101 struct ieee80211_conf *conf) 102 { 103 struct rtl8180_priv *priv = dev->priv; 104 int channel = 105 ieee80211_frequency_to_channel(conf->chandef.chan->center_freq); 106 u32 txpw = priv->channels[channel - 1].hw_value & 0xFF; 107 u32 chan = sa2400_chan[channel - 1]; 108 109 write_sa2400(dev, 7, txpw); 110 111 sa2400_write_phy_antenna(dev, channel); 112 113 write_sa2400(dev, 0, chan); 114 write_sa2400(dev, 1, 0xbb50); 115 write_sa2400(dev, 2, 0x80); 116 write_sa2400(dev, 3, 0); 117 } 118 119 static void sa2400_rf_stop(struct ieee80211_hw *dev) 120 { 121 write_sa2400(dev, 4, 0); 122 } 123 124 static void sa2400_rf_init(struct ieee80211_hw *dev) 125 { 126 struct rtl8180_priv *priv = dev->priv; 127 u32 anaparam, txconf; 128 u8 firdac; 129 int analogphy = priv->rfparam & RF_PARAM_ANALOGPHY; 130 131 anaparam = priv->anaparam; 132 anaparam &= ~(1 << ANAPARAM_TXDACOFF_SHIFT); 133 anaparam &= ~ANAPARAM_PWR1_MASK; 134 anaparam &= ~ANAPARAM_PWR0_MASK; 135 136 if (analogphy) { 137 anaparam |= SA2400_ANA_ANAPARAM_PWR1_ON << ANAPARAM_PWR1_SHIFT; 138 firdac = 0; 139 } else { 140 anaparam |= (SA2400_DIG_ANAPARAM_PWR1_ON << ANAPARAM_PWR1_SHIFT); 141 anaparam |= (SA2400_ANAPARAM_PWR0_ON << ANAPARAM_PWR0_SHIFT); 142 firdac = 1 << SA2400_REG4_FIRDAC_SHIFT; 143 } 144 145 rtl8180_set_anaparam(priv, anaparam); 146 147 write_sa2400(dev, 0, sa2400_chan[0]); 148 write_sa2400(dev, 1, 0xbb50); 149 write_sa2400(dev, 2, 0x80); 150 write_sa2400(dev, 3, 0); 151 write_sa2400(dev, 4, 0x19340 | firdac); 152 write_sa2400(dev, 5, 0x1dfb | (SA2400_MAX_SENS - 54) << 15); 153 write_sa2400(dev, 4, 0x19348 | firdac); /* calibrate VCO */ 154 155 if (!analogphy) 156 write_sa2400(dev, 4, 0x1938c); /*???*/ 157 158 write_sa2400(dev, 4, 0x19340 | firdac); 159 160 write_sa2400(dev, 0, sa2400_chan[0]); 161 write_sa2400(dev, 1, 0xbb50); 162 write_sa2400(dev, 2, 0x80); 163 write_sa2400(dev, 3, 0); 164 write_sa2400(dev, 4, 0x19344 | firdac); /* calibrate filter */ 165 166 /* new from rtl8180 embedded driver (rtl8181 project) */ 167 write_sa2400(dev, 6, 0x13ff | (1 << 23)); /* MANRX */ 168 write_sa2400(dev, 8, 0); /* VCO */ 169 170 if (analogphy) { 171 rtl8180_set_anaparam(priv, anaparam | 172 (1 << ANAPARAM_TXDACOFF_SHIFT)); 173 174 txconf = rtl818x_ioread32(priv, &priv->map->TX_CONF); 175 rtl818x_iowrite32(priv, &priv->map->TX_CONF, 176 txconf | RTL818X_TX_CONF_LOOPBACK_CONT); 177 178 write_sa2400(dev, 4, 0x19341); /* calibrates DC */ 179 180 /* a 5us sleep is required here, 181 * we rely on the 3ms delay introduced in write_sa2400 */ 182 write_sa2400(dev, 4, 0x19345); 183 184 /* a 20us sleep is required here, 185 * we rely on the 3ms delay introduced in write_sa2400 */ 186 187 rtl818x_iowrite32(priv, &priv->map->TX_CONF, txconf); 188 189 rtl8180_set_anaparam(priv, anaparam); 190 } 191 /* end new code */ 192 193 write_sa2400(dev, 4, 0x19341 | firdac); /* RTX MODE */ 194 195 /* baseband configuration */ 196 rtl8180_write_phy(dev, 0, 0x98); 197 rtl8180_write_phy(dev, 3, 0x38); 198 rtl8180_write_phy(dev, 4, 0xe0); 199 rtl8180_write_phy(dev, 5, 0x90); 200 rtl8180_write_phy(dev, 6, 0x1a); 201 rtl8180_write_phy(dev, 7, 0x64); 202 203 sa2400_write_phy_antenna(dev, 1); 204 205 rtl8180_write_phy(dev, 0x11, 0x80); 206 207 if (rtl818x_ioread8(priv, &priv->map->CONFIG2) & 208 RTL818X_CONFIG2_ANTENNA_DIV) 209 rtl8180_write_phy(dev, 0x12, 0xc7); /* enable ant diversity */ 210 else 211 rtl8180_write_phy(dev, 0x12, 0x47); /* disable ant diversity */ 212 213 rtl8180_write_phy(dev, 0x13, 0x90 | priv->csthreshold); 214 215 rtl8180_write_phy(dev, 0x19, 0x0); 216 rtl8180_write_phy(dev, 0x1a, 0xa0); 217 } 218 219 const struct rtl818x_rf_ops sa2400_rf_ops = { 220 .name = "Philips", 221 .init = sa2400_rf_init, 222 .stop = sa2400_rf_stop, 223 .set_chan = sa2400_rf_set_channel, 224 .calc_rssi = sa2400_rf_calc_rssi, 225 }; 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