Add rtl8180 wireless driver

This patch adds a mac80211 based wireless driver for the rtl8180 and
rtl8185 PCI wireless cards.  Also included are some rtl8187 changes
required due to the relationship between that driver and this one.

Michael Wu is primarily responsible for the initial driver and rtl8185
support.  Andreas Merello provided the additional rtl8180 support.

Thanks to Jukka Ruohonen for the donating a rtl8185 card! It was very
helpful for the rtl8225z2 code.

The Signed-off-by information below is collected from the individual
patches submitted to wireless-2.6 before merging this driver upstream.

Signed-off-by: Andrea Merello <andreamrl@tiscali.it>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: Michael Wu <flamingice@sourmilk.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 201 insertions, 0 deletions

diff --git a/drivers/net/wireless/rtl8180_sa2400.c b/drivers/net/wireless/rtl8180_sa2400.c
new file mode 100644
index 00000000000..e08ace7b1cb
--- /dev/null
+++ b/drivers/net/wireless/rtl8180_sa2400.c
@@ -0,0 +1,201 @@
+
+/*
+ * Radio tuning for Philips SA2400 on RTL8180
+ *
+ * Copyright 2007 Andrea Merello <andreamrl@tiscali.it>
+ *
+ * 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/init.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <net/mac80211.h>
+
+#include "rtl8180.h"
+#include "rtl8180_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 void sa2400_rf_set_channel(struct ieee80211_hw *dev,
+				  struct ieee80211_conf *conf)
+{
+	struct rtl8180_priv *priv = dev->priv;
+	u32 txpw = priv->channels[conf->channel - 1].val & 0xFF;
+	u32 chan = sa2400_chan[conf->channel - 1];
+
+	write_sa2400(dev, 7, txpw);
+
+	sa2400_write_phy_antenna(dev, chan);
+
+	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
+};