drivers/net/wireless/rtl8180_grf5101.c

   1
   2 /*
   3  * Radio tuning for GCT GRF5101 on RTL8180
   4  *
   5  * Copyright 2007 Andrea Merello <andreamrl@tiscali.it>
   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/init.h>
  23 #include <linux/pci.h>
  24 #include <linux/delay.h>
  25 #include <net/mac80211.h>
  26
  27 #include "rtl8180.h"
  28 #include "rtl8180_grf5101.h"
  29
  30 static const int grf5101_encode[] = {
  31         0x0, 0x8, 0x4, 0xC,
  32         0x2, 0xA, 0x6, 0xE,
  33         0x1, 0x9, 0x5, 0xD,
  34         0x3, 0xB, 0x7, 0xF
  35 };
  36
  37 static void write_grf5101(struct ieee80211_hw *dev, u8 addr, u32 data)
  38 {
  39         struct rtl8180_priv *priv = dev->priv;
  40         u32 phy_config;
  41
  42         phy_config =  grf5101_encode[(data >> 8) & 0xF];
  43         phy_config |= grf5101_encode[(data >> 4) & 0xF] << 4;
  44         phy_config |= grf5101_encode[data & 0xF] << 8;
  45         phy_config |= grf5101_encode[(addr >> 1) & 0xF] << 12;
  46         phy_config |= (addr & 1) << 16;
  47         phy_config |= grf5101_encode[(data & 0xf000) >> 12] << 24;
  48
  49         /* MAC will bang bits to the chip */
  50         phy_config |= 0x90000000;
  51
  52         rtl818x_iowrite32(priv,
  53                 (__le32 __iomem *) &priv->map->RFPinsOutput, phy_config);
  54
  55         msleep(3);
  56 }
  57
  58 static void grf5101_write_phy_antenna(struct ieee80211_hw *dev, short chan)
  59 {
  60         struct rtl8180_priv *priv = dev->priv;
  61         u8 ant = GRF5101_ANTENNA;
  62
  63         if (priv->rfparam & RF_PARAM_ANTBDEFAULT)
  64                 ant |= BB_ANTENNA_B;
  65
  66         if (chan == 14)
  67                 ant |= BB_ANTATTEN_CHAN14;
  68
  69         rtl8180_write_phy(dev, 0x10, ant);
  70 }
  71
  72 static void grf5101_rf_set_channel(struct ieee80211_hw *dev,
  73                                    struct ieee80211_conf *conf)
  74 {
  75         struct rtl8180_priv *priv = dev->priv;
  76         int channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
  77         u32 txpw = priv->channels[channel - 1].hw_value & 0xFF;
  78         u32 chan = channel - 1;
  79
  80         /* set TX power */
  81         write_grf5101(dev, 0x15, 0x0);
  82         write_grf5101(dev, 0x06, txpw);
  83         write_grf5101(dev, 0x15, 0x10);
  84         write_grf5101(dev, 0x15, 0x0);
  85
  86         /* set frequency */
  87         write_grf5101(dev, 0x07, 0x0);
  88         write_grf5101(dev, 0x0B, chan);
  89         write_grf5101(dev, 0x07, 0x1000);
  90
  91         grf5101_write_phy_antenna(dev, chan);
  92 }
  93
  94 static void grf5101_rf_stop(struct ieee80211_hw *dev)
  95 {
  96         struct rtl8180_priv *priv = dev->priv;
  97         u32 anaparam;
  98
  99         anaparam = priv->anaparam;
 100         anaparam &= 0x000fffff;
 101         anaparam |= 0x3f900000;
 102         rtl8180_set_anaparam(priv, anaparam);
 103
 104         write_grf5101(dev, 0x07, 0x0);
 105         write_grf5101(dev, 0x1f, 0x45);
 106         write_grf5101(dev, 0x1f, 0x5);
 107         write_grf5101(dev, 0x00, 0x8e4);
 108 }
 109
 110 static void grf5101_rf_init(struct ieee80211_hw *dev)
 111 {
 112         struct rtl8180_priv *priv = dev->priv;
 113
 114         rtl8180_set_anaparam(priv, priv->anaparam);
 115
 116         write_grf5101(dev, 0x1f, 0x0);
 117         write_grf5101(dev, 0x1f, 0x0);
 118         write_grf5101(dev, 0x1f, 0x40);
 119         write_grf5101(dev, 0x1f, 0x60);
 120         write_grf5101(dev, 0x1f, 0x61);
 121         write_grf5101(dev, 0x1f, 0x61);
 122         write_grf5101(dev, 0x00, 0xae4);
 123         write_grf5101(dev, 0x1f, 0x1);
 124         write_grf5101(dev, 0x1f, 0x41);
 125         write_grf5101(dev, 0x1f, 0x61);
 126
 127         write_grf5101(dev, 0x01, 0x1a23);
 128         write_grf5101(dev, 0x02, 0x4971);
 129         write_grf5101(dev, 0x03, 0x41de);
 130         write_grf5101(dev, 0x04, 0x2d80);
 131         write_grf5101(dev, 0x05, 0x68ff);       /* 0x61ff original value */
 132         write_grf5101(dev, 0x06, 0x0);
 133         write_grf5101(dev, 0x07, 0x0);
 134         write_grf5101(dev, 0x08, 0x7533);
 135         write_grf5101(dev, 0x09, 0xc401);
 136         write_grf5101(dev, 0x0a, 0x0);
 137         write_grf5101(dev, 0x0c, 0x1c7);
 138         write_grf5101(dev, 0x0d, 0x29d3);
 139         write_grf5101(dev, 0x0e, 0x2e8);
 140         write_grf5101(dev, 0x10, 0x192);
 141         write_grf5101(dev, 0x11, 0x248);
 142         write_grf5101(dev, 0x12, 0x0);
 143         write_grf5101(dev, 0x13, 0x20c4);
 144         write_grf5101(dev, 0x14, 0xf4fc);
 145         write_grf5101(dev, 0x15, 0x0);
 146         write_grf5101(dev, 0x16, 0x1500);
 147
 148         write_grf5101(dev, 0x07, 0x1000);
 149
 150         /* baseband configuration */
 151         rtl8180_write_phy(dev, 0, 0xa8);
 152         rtl8180_write_phy(dev, 3, 0x0);
 153         rtl8180_write_phy(dev, 4, 0xc0);
 154         rtl8180_write_phy(dev, 5, 0x90);
 155         rtl8180_write_phy(dev, 6, 0x1e);
 156         rtl8180_write_phy(dev, 7, 0x64);
 157
 158         grf5101_write_phy_antenna(dev, 1);
 159
 160         rtl8180_write_phy(dev, 0x11, 0x88);
 161
 162         if (rtl818x_ioread8(priv, &priv->map->CONFIG2) &
 163             RTL818X_CONFIG2_ANTENNA_DIV)
 164                 rtl8180_write_phy(dev, 0x12, 0xc0); /* enable ant diversity */
 165         else
 166                 rtl8180_write_phy(dev, 0x12, 0x40); /* disable ant diversity */
 167
 168         rtl8180_write_phy(dev, 0x13, 0x90 | priv->csthreshold);
 169
 170         rtl8180_write_phy(dev, 0x19, 0x0);
 171         rtl8180_write_phy(dev, 0x1a, 0xa0);
 172         rtl8180_write_phy(dev, 0x1b, 0x44);
 173 }
 174
 175 const struct rtl818x_rf_ops grf5101_rf_ops = {
 176         .name           = "GCT",
 177         .init           = grf5101_rf_init,
 178         .stop           = grf5101_rf_stop,
 179         .set_chan       = grf5101_rf_set_channel
 180 };