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1// SPDX-License-Identifier: GPL-2.0-only2 3/*4 * Radio tuning for GCT GRF5101 on RTL81805 *6 * Copyright 2007 Andrea Merello <andrea.merello@gmail.com>7 *8 * Code from the BSD driver and the rtl8181 project have been9 * very useful to understand certain things10 *11 * I want to thanks the Authors of such projects and the Ndiswrapper12 * 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 driver16 * 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 "grf5101.h"25 26static const int grf5101_encode[] = {27 0x0, 0x8, 0x4, 0xC,28 0x2, 0xA, 0x6, 0xE,29 0x1, 0x9, 0x5, 0xD,30 0x3, 0xB, 0x7, 0xF31};32 33static void write_grf5101(struct ieee80211_hw *dev, u8 addr, u32 data)34{35 struct rtl8180_priv *priv = dev->priv;36 u32 phy_config;37 38 phy_config = grf5101_encode[(data >> 8) & 0xF];39 phy_config |= grf5101_encode[(data >> 4) & 0xF] << 4;40 phy_config |= grf5101_encode[data & 0xF] << 8;41 phy_config |= grf5101_encode[(addr >> 1) & 0xF] << 12;42 phy_config |= (addr & 1) << 16;43 phy_config |= grf5101_encode[(data & 0xf000) >> 12] << 24;44 45 /* MAC will bang bits to the chip */46 phy_config |= 0x90000000;47 48 rtl818x_iowrite32(priv,49 (__le32 __iomem *) &priv->map->RFPinsOutput, phy_config);50 51 msleep(3);52}53 54static void grf5101_write_phy_antenna(struct ieee80211_hw *dev, short chan)55{56 struct rtl8180_priv *priv = dev->priv;57 u8 ant = GRF5101_ANTENNA;58 59 if (priv->rfparam & RF_PARAM_ANTBDEFAULT)60 ant |= BB_ANTENNA_B;61 62 if (chan == 14)63 ant |= BB_ANTATTEN_CHAN14;64 65 rtl8180_write_phy(dev, 0x10, ant);66}67 68static u8 grf5101_rf_calc_rssi(u8 agc, u8 sq)69{70 if (agc > 60)71 return 65;72 73 /* TODO(?): just return agc (or agc + 5) to avoid mult / div */74 return 65 * agc / 60;75}76 77static void grf5101_rf_set_channel(struct ieee80211_hw *dev,78 struct ieee80211_conf *conf)79{80 struct rtl8180_priv *priv = dev->priv;81 int channel =82 ieee80211_frequency_to_channel(conf->chandef.chan->center_freq);83 u32 txpw = priv->channels[channel - 1].hw_value & 0xFF;84 u32 chan = channel - 1;85 86 /* set TX power */87 write_grf5101(dev, 0x15, 0x0);88 write_grf5101(dev, 0x06, txpw);89 write_grf5101(dev, 0x15, 0x10);90 write_grf5101(dev, 0x15, 0x0);91 92 /* set frequency */93 write_grf5101(dev, 0x07, 0x0);94 write_grf5101(dev, 0x0B, chan);95 write_grf5101(dev, 0x07, 0x1000);96 97 grf5101_write_phy_antenna(dev, channel);98}99 100static void grf5101_rf_stop(struct ieee80211_hw *dev)101{102 struct rtl8180_priv *priv = dev->priv;103 u32 anaparam;104 105 anaparam = priv->anaparam;106 anaparam &= 0x000fffff;107 anaparam |= 0x3f900000;108 rtl8180_set_anaparam(priv, anaparam);109 110 write_grf5101(dev, 0x07, 0x0);111 write_grf5101(dev, 0x1f, 0x45);112 write_grf5101(dev, 0x1f, 0x5);113 write_grf5101(dev, 0x00, 0x8e4);114}115 116static void grf5101_rf_init(struct ieee80211_hw *dev)117{118 struct rtl8180_priv *priv = dev->priv;119 120 rtl8180_set_anaparam(priv, priv->anaparam);121 122 write_grf5101(dev, 0x1f, 0x0);123 write_grf5101(dev, 0x1f, 0x0);124 write_grf5101(dev, 0x1f, 0x40);125 write_grf5101(dev, 0x1f, 0x60);126 write_grf5101(dev, 0x1f, 0x61);127 write_grf5101(dev, 0x1f, 0x61);128 write_grf5101(dev, 0x00, 0xae4);129 write_grf5101(dev, 0x1f, 0x1);130 write_grf5101(dev, 0x1f, 0x41);131 write_grf5101(dev, 0x1f, 0x61);132 133 write_grf5101(dev, 0x01, 0x1a23);134 write_grf5101(dev, 0x02, 0x4971);135 write_grf5101(dev, 0x03, 0x41de);136 write_grf5101(dev, 0x04, 0x2d80);137 write_grf5101(dev, 0x05, 0x68ff); /* 0x61ff original value */138 write_grf5101(dev, 0x06, 0x0);139 write_grf5101(dev, 0x07, 0x0);140 write_grf5101(dev, 0x08, 0x7533);141 write_grf5101(dev, 0x09, 0xc401);142 write_grf5101(dev, 0x0a, 0x0);143 write_grf5101(dev, 0x0c, 0x1c7);144 write_grf5101(dev, 0x0d, 0x29d3);145 write_grf5101(dev, 0x0e, 0x2e8);146 write_grf5101(dev, 0x10, 0x192);147 write_grf5101(dev, 0x11, 0x248);148 write_grf5101(dev, 0x12, 0x0);149 write_grf5101(dev, 0x13, 0x20c4);150 write_grf5101(dev, 0x14, 0xf4fc);151 write_grf5101(dev, 0x15, 0x0);152 write_grf5101(dev, 0x16, 0x1500);153 154 write_grf5101(dev, 0x07, 0x1000);155 156 /* baseband configuration */157 rtl8180_write_phy(dev, 0, 0xa8);158 rtl8180_write_phy(dev, 3, 0x0);159 rtl8180_write_phy(dev, 4, 0xc0);160 rtl8180_write_phy(dev, 5, 0x90);161 rtl8180_write_phy(dev, 6, 0x1e);162 rtl8180_write_phy(dev, 7, 0x64);163 164 grf5101_write_phy_antenna(dev, 1);165 166 rtl8180_write_phy(dev, 0x11, 0x88);167 168 if (rtl818x_ioread8(priv, &priv->map->CONFIG2) &169 RTL818X_CONFIG2_ANTENNA_DIV)170 rtl8180_write_phy(dev, 0x12, 0xc0); /* enable ant diversity */171 else172 rtl8180_write_phy(dev, 0x12, 0x40); /* disable ant diversity */173 174 rtl8180_write_phy(dev, 0x13, 0x90 | priv->csthreshold);175 176 rtl8180_write_phy(dev, 0x19, 0x0);177 rtl8180_write_phy(dev, 0x1a, 0xa0);178 rtl8180_write_phy(dev, 0x1b, 0x44);179}180 181const struct rtl818x_rf_ops grf5101_rf_ops = {182 .name = "GCT",183 .init = grf5101_rf_init,184 .stop = grf5101_rf_stop,185 .set_chan = grf5101_rf_set_channel,186 .calc_rssi = grf5101_rf_calc_rssi,187};188