drivers/net/wireless/rtl8180_sa2400.c

   1
   2 /*
   3  * Radio tuning for Philips SA2400 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_sa2400.h"
  29
  30 static const u32 sa2400_chan[] = {
  31         0x00096c, /* ch1 */
  32         0x080970,
  33         0x100974,
  34         0x180978,
  35         0x000980,
  36         0x080984,
  37         0x100988,
  38         0x18098c,
  39         0x000994,
  40         0x080998,
  41         0x10099c,
  42         0x1809a0,
  43         0x0009a8,
  44         0x0009b4, /* ch 14 */
  45 };
  46
  47 static void write_sa2400(struct ieee80211_hw *dev, u8 addr, u32 data)
  48 {
  49         struct rtl8180_priv *priv = dev->priv;
  50         u32 phy_config;
  51
  52         /* MAC will bang bits to the sa2400. sw 3-wire is NOT used */
  53         phy_config = 0xb0000000;
  54
  55         phy_config |= ((u32)(addr & 0xf)) << 24;
  56         phy_config |= data & 0xffffff;
  57
  58         rtl818x_iowrite32(priv,
  59                 (__le32 __iomem *) &priv->map->RFPinsOutput, phy_config);
  60
  61         msleep(3);
  62 }
  63
  64 static void sa2400_write_phy_antenna(struct ieee80211_hw *dev, short chan)
  65 {
  66         struct rtl8180_priv *priv = dev->priv;
  67         u8 ant = SA2400_ANTENNA;
  68
  69         if (priv->rfparam & RF_PARAM_ANTBDEFAULT)
  70                 ant |= BB_ANTENNA_B;
  71
  72         if (chan == 14)
  73                 ant |= BB_ANTATTEN_CHAN14;
  74
  75         rtl8180_write_phy(dev, 0x10, ant);
  76
  77 }
  78
  79 static void sa2400_rf_set_channel(struct ieee80211_hw *dev,
  80                                   struct ieee80211_conf *conf)
  81 {
  82         struct rtl8180_priv *priv = dev->priv;
  83         u32 txpw = priv->channels[conf->channel - 1].val & 0xFF;
  84         u32 chan = sa2400_chan[conf->channel - 1];
  85
  86         write_sa2400(dev, 7, txpw);
  87
  88         sa2400_write_phy_antenna(dev, chan);
  89
  90         write_sa2400(dev, 0, chan);
  91         write_sa2400(dev, 1, 0xbb50);
  92         write_sa2400(dev, 2, 0x80);
  93         write_sa2400(dev, 3, 0);
  94 }
  95
  96 static void sa2400_rf_stop(struct ieee80211_hw *dev)
  97 {
  98         write_sa2400(dev, 4, 0);
  99 }
 100
 101 static void sa2400_rf_init(struct ieee80211_hw *dev)
 102 {
 103         struct rtl8180_priv *priv = dev->priv;
 104         u32 anaparam, txconf;
 105         u8 firdac;
 106         int analogphy = priv->rfparam & RF_PARAM_ANALOGPHY;
 107
 108         anaparam = priv->anaparam;
 109         anaparam &= ~(1 << ANAPARAM_TXDACOFF_SHIFT);
 110         anaparam &= ~ANAPARAM_PWR1_MASK;
 111         anaparam &= ~ANAPARAM_PWR0_MASK;
 112
 113         if (analogphy) {
 114                 anaparam |= SA2400_ANA_ANAPARAM_PWR1_ON << ANAPARAM_PWR1_SHIFT;
 115                 firdac = 0;
 116         } else {
 117                 anaparam |= (SA2400_DIG_ANAPARAM_PWR1_ON << ANAPARAM_PWR1_SHIFT);
 118                 anaparam |= (SA2400_ANAPARAM_PWR0_ON << ANAPARAM_PWR0_SHIFT);
 119                 firdac = 1 << SA2400_REG4_FIRDAC_SHIFT;
 120         }
 121
 122         rtl8180_set_anaparam(priv, anaparam);
 123
 124         write_sa2400(dev, 0, sa2400_chan[0]);
 125         write_sa2400(dev, 1, 0xbb50);
 126         write_sa2400(dev, 2, 0x80);
 127         write_sa2400(dev, 3, 0);
 128         write_sa2400(dev, 4, 0x19340 | firdac);
 129         write_sa2400(dev, 5, 0x1dfb | (SA2400_MAX_SENS - 54) << 15);
 130         write_sa2400(dev, 4, 0x19348 | firdac); /* calibrate VCO */
 131
 132         if (!analogphy)
 133                 write_sa2400(dev, 4, 0x1938c); /*???*/
 134
 135         write_sa2400(dev, 4, 0x19340 | firdac);
 136
 137         write_sa2400(dev, 0, sa2400_chan[0]);
 138         write_sa2400(dev, 1, 0xbb50);
 139         write_sa2400(dev, 2, 0x80);
 140         write_sa2400(dev, 3, 0);
 141         write_sa2400(dev, 4, 0x19344 | firdac); /* calibrate filter */
 142
 143         /* new from rtl8180 embedded driver (rtl8181 project) */
 144         write_sa2400(dev, 6, 0x13ff | (1 << 23)); /* MANRX */
 145         write_sa2400(dev, 8, 0); /* VCO */
 146
 147         if (analogphy) {
 148                 rtl8180_set_anaparam(priv, anaparam |
 149                                      (1 << ANAPARAM_TXDACOFF_SHIFT));
 150
 151                 txconf = rtl818x_ioread32(priv, &priv->map->TX_CONF);
 152                 rtl818x_iowrite32(priv, &priv->map->TX_CONF,
 153                         txconf | RTL818X_TX_CONF_LOOPBACK_CONT);
 154
 155                 write_sa2400(dev, 4, 0x19341); /* calibrates DC */
 156
 157                 /* a 5us sleep is required here,
 158                  * we rely on the 3ms delay introduced in write_sa2400 */
 159                 write_sa2400(dev, 4, 0x19345);
 160
 161                 /* a 20us sleep is required here,
 162                  * we rely on the 3ms delay introduced in write_sa2400 */
 163
 164                 rtl818x_iowrite32(priv, &priv->map->TX_CONF, txconf);
 165
 166                 rtl8180_set_anaparam(priv, anaparam);
 167         }
 168         /* end new code */
 169
 170         write_sa2400(dev, 4, 0x19341 | firdac); /* RTX MODE */
 171
 172         /* baseband configuration */
 173         rtl8180_write_phy(dev, 0, 0x98);
 174         rtl8180_write_phy(dev, 3, 0x38);
 175         rtl8180_write_phy(dev, 4, 0xe0);
 176         rtl8180_write_phy(dev, 5, 0x90);
 177         rtl8180_write_phy(dev, 6, 0x1a);
 178         rtl8180_write_phy(dev, 7, 0x64);
 179
 180         sa2400_write_phy_antenna(dev, 1);
 181
 182         rtl8180_write_phy(dev, 0x11, 0x80);
 183
 184         if (rtl818x_ioread8(priv, &priv->map->CONFIG2) &
 185             RTL818X_CONFIG2_ANTENNA_DIV)
 186                 rtl8180_write_phy(dev, 0x12, 0xc7); /* enable ant diversity */
 187         else
 188                 rtl8180_write_phy(dev, 0x12, 0x47); /* disable ant diversity */
 189
 190         rtl8180_write_phy(dev, 0x13, 0x90 | priv->csthreshold);
 191
 192         rtl8180_write_phy(dev, 0x19, 0x0);
 193         rtl8180_write_phy(dev, 0x1a, 0xa0);
 194 }
 195
 196 const struct rtl818x_rf_ops sa2400_rf_ops = {
 197         .name           = "Philips",
 198         .init           = sa2400_rf_init,
 199         .stop           = sa2400_rf_stop,
 200         .set_chan       = sa2400_rf_set_channel
 201 };