--- /dev/null
+
+/*
+ * 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!
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#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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