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// SPDX-License-Identifier: GPL-2.0-only
/*
* Radio tuning for Philips SA2400 on RTL8180
*
* Copyright 2007 Andrea Merello <andrea.merello@gmail.com>
*
* Code from the BSD driver and the rtl8181 project have been
* very useful to understand certain things
*
* I want to thanks the Authors of such projects and the Ndiswrapper
* project Authors.
*
* A special Big Thanks also is for all people who donated me cards,
* making possible the creation of the original rtl8180 driver
* from which this code is derived!
*/
#include <linux/pci.h>
#include <linux/delay.h>
#include <net/mac80211.h>
#include "rtl8180.h"
#include "sa2400.h"
static const u32 sa2400_chan[] = {
0x00096c, /* ch1 */
0x080970,
0x100974,
0x180978,
0x000980,
0x080984,
0x100988,
0x18098c,
0x000994,
0x080998,
0x10099c,
0x1809a0,
0x0009a8,
0x0009b4, /* ch 14 */
};
static void write_sa2400(struct ieee80211_hw *dev, u8 addr, u32 data)
{
struct rtl8180_priv *priv = dev->priv;
u32 phy_config;
/* MAC will bang bits to the sa2400. sw 3-wire is NOT used */
phy_config = 0xb0000000;
phy_config |= ((u32)(addr & 0xf)) << 24;
phy_config |= data & 0xffffff;
rtl818x_iowrite32(priv,
(__le32 __iomem *) &priv->map->RFPinsOutput, phy_config);
msleep(3);
}
static void sa2400_write_phy_antenna(struct ieee80211_hw *dev, short chan)
{
struct rtl8180_priv *priv = dev->priv;
u8 ant = SA2400_ANTENNA;
if (priv->rfparam & RF_PARAM_ANTBDEFAULT)
ant |= BB_ANTENNA_B;
if (chan == 14)
ant |= BB_ANTATTEN_CHAN14;
rtl8180_write_phy(dev, 0x10, ant);
}
static u8 sa2400_rf_rssi_map[] = {
0x64, 0x64, 0x63, 0x62, 0x61, 0x60, 0x5f, 0x5e,
0x5d, 0x5c, 0x5b, 0x5a, 0x57, 0x54, 0x52, 0x50,
0x4e, 0x4c, 0x4a, 0x48, 0x46, 0x44, 0x41, 0x3f,
0x3c, 0x3a, 0x37, 0x36, 0x36, 0x1c, 0x1c, 0x1b,
0x1b, 0x1a, 0x1a, 0x19, 0x19, 0x18, 0x18, 0x17,
0x17, 0x16, 0x16, 0x15, 0x15, 0x14, 0x14, 0x13,
0x13, 0x12, 0x12, 0x11, 0x11, 0x10, 0x10, 0x0f,
0x0f, 0x0e, 0x0e, 0x0d, 0x0d, 0x0c, 0x0c, 0x0b,
0x0b, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x07,
0x07, 0x06, 0x06, 0x05, 0x04, 0x03, 0x02,
};
static u8 sa2400_rf_calc_rssi(u8 agc, u8 sq)
{
if (sq == 0x80)
return 1;
if (sq > 78)
return 32;
/* TODO: recalc sa2400_rf_rssi_map to avoid mult / div */
return 65 * sa2400_rf_rssi_map[sq] / 100;
}
static void sa2400_rf_set_channel(struct ieee80211_hw *dev,
struct ieee80211_conf *conf)
{
struct rtl8180_priv *priv = dev->priv;
int channel =
ieee80211_frequency_to_channel(conf->chandef.chan->center_freq);
u32 txpw = priv->channels[channel - 1].hw_value & 0xFF;
u32 chan = sa2400_chan[channel - 1];
write_sa2400(dev, 7, txpw);
sa2400_write_phy_antenna(dev, channel);
write_sa2400(dev, 0, chan);
write_sa2400(dev, 1, 0xbb50);
write_sa2400(dev, 2, 0x80);
write_sa2400(dev, 3, 0);
}
static void sa2400_rf_stop(struct ieee80211_hw *dev)
{
write_sa2400(dev, 4, 0);
}
static void sa2400_rf_init(struct ieee80211_hw *dev)
{
struct rtl8180_priv *priv = dev->priv;
u32 anaparam, txconf;
u8 firdac;
int analogphy = priv->rfparam & RF_PARAM_ANALOGPHY;
anaparam = priv->anaparam;
anaparam &= ~(1 << ANAPARAM_TXDACOFF_SHIFT);
anaparam &= ~ANAPARAM_PWR1_MASK;
anaparam &= ~ANAPARAM_PWR0_MASK;
if (analogphy) {
anaparam |= SA2400_ANA_ANAPARAM_PWR1_ON << ANAPARAM_PWR1_SHIFT;
firdac = 0;
} else {
anaparam |= (SA2400_DIG_ANAPARAM_PWR1_ON << ANAPARAM_PWR1_SHIFT);
anaparam |= (SA2400_ANAPARAM_PWR0_ON << ANAPARAM_PWR0_SHIFT);
firdac = 1 << SA2400_REG4_FIRDAC_SHIFT;
}
rtl8180_set_anaparam(priv, anaparam);
write_sa2400(dev, 0, sa2400_chan[0]);
write_sa2400(dev, 1, 0xbb50);
write_sa2400(dev, 2, 0x80);
write_sa2400(dev, 3, 0);
write_sa2400(dev, 4, 0x19340 | firdac);
write_sa2400(dev, 5, 0x1dfb | (SA2400_MAX_SENS - 54) << 15);
write_sa2400(dev, 4, 0x19348 | firdac); /* calibrate VCO */
if (!analogphy)
write_sa2400(dev, 4, 0x1938c); /*???*/
write_sa2400(dev, 4, 0x19340 | firdac);
write_sa2400(dev, 0, sa2400_chan[0]);
write_sa2400(dev, 1, 0xbb50);
write_sa2400(dev, 2, 0x80);
write_sa2400(dev, 3, 0);
write_sa2400(dev, 4, 0x19344 | firdac); /* calibrate filter */
/* new from rtl8180 embedded driver (rtl8181 project) */
write_sa2400(dev, 6, 0x13ff | (1 << 23)); /* MANRX */
write_sa2400(dev, 8, 0); /* VCO */
if (analogphy) {
rtl8180_set_anaparam(priv, anaparam |
(1 << ANAPARAM_TXDACOFF_SHIFT));
txconf = rtl818x_ioread32(priv, &priv->map->TX_CONF);
rtl818x_iowrite32(priv, &priv->map->TX_CONF,
txconf | RTL818X_TX_CONF_LOOPBACK_CONT);
write_sa2400(dev, 4, 0x19341); /* calibrates DC */
/* a 5us sleep is required here,
* we rely on the 3ms delay introduced in write_sa2400 */
write_sa2400(dev, 4, 0x19345);
/* a 20us sleep is required here,
* we rely on the 3ms delay introduced in write_sa2400 */
rtl818x_iowrite32(priv, &priv->map->TX_CONF, txconf);
rtl8180_set_anaparam(priv, anaparam);
}
/* end new code */
write_sa2400(dev, 4, 0x19341 | firdac); /* RTX MODE */
/* baseband configuration */
rtl8180_write_phy(dev, 0, 0x98);
rtl8180_write_phy(dev, 3, 0x38);
rtl8180_write_phy(dev, 4, 0xe0);
rtl8180_write_phy(dev, 5, 0x90);
rtl8180_write_phy(dev, 6, 0x1a);
rtl8180_write_phy(dev, 7, 0x64);
sa2400_write_phy_antenna(dev, 1);
rtl8180_write_phy(dev, 0x11, 0x80);
if (rtl818x_ioread8(priv, &priv->map->CONFIG2) &
RTL818X_CONFIG2_ANTENNA_DIV)
rtl8180_write_phy(dev, 0x12, 0xc7); /* enable ant diversity */
else
rtl8180_write_phy(dev, 0x12, 0x47); /* disable ant diversity */
rtl8180_write_phy(dev, 0x13, 0x90 | priv->csthreshold);
rtl8180_write_phy(dev, 0x19, 0x0);
rtl8180_write_phy(dev, 0x1a, 0xa0);
}
const struct rtl818x_rf_ops sa2400_rf_ops = {
.name = "Philips",
.init = sa2400_rf_init,
.stop = sa2400_rf_stop,
.set_chan = sa2400_rf_set_channel,
.calc_rssi = sa2400_rf_calc_rssi,
};
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