188 lines
4.8 KiB
C
188 lines
4.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Radio tuning for GCT GRF5101 on RTL8180
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*
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* Copyright 2007 Andrea Merello <andrea.merello@gmail.com>
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*
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* Code from the BSD driver and the rtl8181 project have been
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* very useful to understand certain things
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*
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* I want to thanks the Authors of such projects and the Ndiswrapper
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* project Authors.
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*
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* A special Big Thanks also is for all people who donated me cards,
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* making possible the creation of the original rtl8180 driver
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* from which this code is derived!
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*/
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <net/mac80211.h>
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#include "rtl8180.h"
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#include "grf5101.h"
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static const int grf5101_encode[] = {
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0x0, 0x8, 0x4, 0xC,
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0x2, 0xA, 0x6, 0xE,
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0x1, 0x9, 0x5, 0xD,
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0x3, 0xB, 0x7, 0xF
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};
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static void write_grf5101(struct ieee80211_hw *dev, u8 addr, u32 data)
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{
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struct rtl8180_priv *priv = dev->priv;
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u32 phy_config;
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phy_config = grf5101_encode[(data >> 8) & 0xF];
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phy_config |= grf5101_encode[(data >> 4) & 0xF] << 4;
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phy_config |= grf5101_encode[data & 0xF] << 8;
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phy_config |= grf5101_encode[(addr >> 1) & 0xF] << 12;
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phy_config |= (addr & 1) << 16;
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phy_config |= grf5101_encode[(data & 0xf000) >> 12] << 24;
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/* MAC will bang bits to the chip */
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phy_config |= 0x90000000;
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rtl818x_iowrite32(priv,
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(__le32 __iomem *) &priv->map->RFPinsOutput, phy_config);
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msleep(3);
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}
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static void grf5101_write_phy_antenna(struct ieee80211_hw *dev, short chan)
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{
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struct rtl8180_priv *priv = dev->priv;
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u8 ant = GRF5101_ANTENNA;
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if (priv->rfparam & RF_PARAM_ANTBDEFAULT)
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ant |= BB_ANTENNA_B;
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if (chan == 14)
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ant |= BB_ANTATTEN_CHAN14;
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rtl8180_write_phy(dev, 0x10, ant);
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}
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static u8 grf5101_rf_calc_rssi(u8 agc, u8 sq)
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{
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if (agc > 60)
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return 65;
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/* TODO(?): just return agc (or agc + 5) to avoid mult / div */
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return 65 * agc / 60;
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}
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static void grf5101_rf_set_channel(struct ieee80211_hw *dev,
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struct ieee80211_conf *conf)
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{
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struct rtl8180_priv *priv = dev->priv;
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int channel =
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ieee80211_frequency_to_channel(conf->chandef.chan->center_freq);
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u32 txpw = priv->channels[channel - 1].hw_value & 0xFF;
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u32 chan = channel - 1;
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/* set TX power */
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write_grf5101(dev, 0x15, 0x0);
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write_grf5101(dev, 0x06, txpw);
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write_grf5101(dev, 0x15, 0x10);
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write_grf5101(dev, 0x15, 0x0);
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/* set frequency */
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write_grf5101(dev, 0x07, 0x0);
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write_grf5101(dev, 0x0B, chan);
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write_grf5101(dev, 0x07, 0x1000);
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grf5101_write_phy_antenna(dev, channel);
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}
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static void grf5101_rf_stop(struct ieee80211_hw *dev)
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{
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struct rtl8180_priv *priv = dev->priv;
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u32 anaparam;
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anaparam = priv->anaparam;
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anaparam &= 0x000fffff;
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anaparam |= 0x3f900000;
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rtl8180_set_anaparam(priv, anaparam);
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write_grf5101(dev, 0x07, 0x0);
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write_grf5101(dev, 0x1f, 0x45);
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write_grf5101(dev, 0x1f, 0x5);
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write_grf5101(dev, 0x00, 0x8e4);
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}
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static void grf5101_rf_init(struct ieee80211_hw *dev)
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{
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struct rtl8180_priv *priv = dev->priv;
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rtl8180_set_anaparam(priv, priv->anaparam);
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write_grf5101(dev, 0x1f, 0x0);
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write_grf5101(dev, 0x1f, 0x0);
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write_grf5101(dev, 0x1f, 0x40);
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write_grf5101(dev, 0x1f, 0x60);
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write_grf5101(dev, 0x1f, 0x61);
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write_grf5101(dev, 0x1f, 0x61);
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write_grf5101(dev, 0x00, 0xae4);
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write_grf5101(dev, 0x1f, 0x1);
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write_grf5101(dev, 0x1f, 0x41);
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write_grf5101(dev, 0x1f, 0x61);
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write_grf5101(dev, 0x01, 0x1a23);
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write_grf5101(dev, 0x02, 0x4971);
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write_grf5101(dev, 0x03, 0x41de);
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write_grf5101(dev, 0x04, 0x2d80);
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write_grf5101(dev, 0x05, 0x68ff); /* 0x61ff original value */
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write_grf5101(dev, 0x06, 0x0);
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write_grf5101(dev, 0x07, 0x0);
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write_grf5101(dev, 0x08, 0x7533);
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write_grf5101(dev, 0x09, 0xc401);
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write_grf5101(dev, 0x0a, 0x0);
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write_grf5101(dev, 0x0c, 0x1c7);
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write_grf5101(dev, 0x0d, 0x29d3);
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write_grf5101(dev, 0x0e, 0x2e8);
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write_grf5101(dev, 0x10, 0x192);
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write_grf5101(dev, 0x11, 0x248);
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write_grf5101(dev, 0x12, 0x0);
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write_grf5101(dev, 0x13, 0x20c4);
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write_grf5101(dev, 0x14, 0xf4fc);
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write_grf5101(dev, 0x15, 0x0);
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write_grf5101(dev, 0x16, 0x1500);
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write_grf5101(dev, 0x07, 0x1000);
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/* baseband configuration */
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rtl8180_write_phy(dev, 0, 0xa8);
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rtl8180_write_phy(dev, 3, 0x0);
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rtl8180_write_phy(dev, 4, 0xc0);
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rtl8180_write_phy(dev, 5, 0x90);
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rtl8180_write_phy(dev, 6, 0x1e);
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rtl8180_write_phy(dev, 7, 0x64);
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grf5101_write_phy_antenna(dev, 1);
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rtl8180_write_phy(dev, 0x11, 0x88);
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if (rtl818x_ioread8(priv, &priv->map->CONFIG2) &
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RTL818X_CONFIG2_ANTENNA_DIV)
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rtl8180_write_phy(dev, 0x12, 0xc0); /* enable ant diversity */
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else
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rtl8180_write_phy(dev, 0x12, 0x40); /* disable ant diversity */
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rtl8180_write_phy(dev, 0x13, 0x90 | priv->csthreshold);
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rtl8180_write_phy(dev, 0x19, 0x0);
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rtl8180_write_phy(dev, 0x1a, 0xa0);
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rtl8180_write_phy(dev, 0x1b, 0x44);
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}
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const struct rtl818x_rf_ops grf5101_rf_ops = {
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.name = "GCT",
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.init = grf5101_rf_init,
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.stop = grf5101_rf_stop,
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.set_chan = grf5101_rf_set_channel,
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.calc_rssi = grf5101_rf_calc_rssi,
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};
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