1 files changed, 150 insertions, 0 deletions

diff --git a/drivers/net/wireless/rtl8180_max2820.c b/drivers/net/wireless/rtl8180_max2820.c
new file mode 100644
index 000000000000..98fe9fd64968
--- /dev/null
+++ b/drivers/net/wireless/rtl8180_max2820.c
@@ -0,0 +1,150 @@
+/*
+ * Radio tuning for Maxim max2820 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_max2820.h"
+
+static const u32 max2820_chan[] = {
+        12, /* CH 1 */
+        17,
+        22,
+        27,
+        32,
+        37,
+        42,
+        47,
+        52,
+        57,
+        62,
+        67,
+        72,
+        84, /* CH 14 */
+};
+
+static void write_max2820(struct ieee80211_hw *dev, u8 addr, u32 data)
+{
+        struct rtl8180_priv *priv = dev->priv;
+        u32 phy_config;
+
+        phy_config = 0x90 + (data & 0xf);
+        phy_config <<= 16;
+        phy_config += addr;
+        phy_config <<= 8;
+        phy_config += (data >> 4) & 0xff;
+
+        rtl818x_iowrite32(priv,
+                (__le32 __iomem *) &priv->map->RFPinsOutput, phy_config);
+
+        msleep(1);
+}
+
+static void max2820_write_phy_antenna(struct ieee80211_hw *dev, short chan)
+{
+        struct rtl8180_priv *priv = dev->priv;
+        u8 ant;
+
+        ant = MAXIM_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 max2820_rf_set_channel(struct ieee80211_hw *dev,
+                                   struct ieee80211_conf *conf)
+{
+        struct rtl8180_priv *priv = dev->priv;
+        unsigned int chan_idx = conf ? conf->channel - 1 : 0;
+        u32 txpw = priv->channels[chan_idx].val & 0xFF;
+        u32 chan = max2820_chan[chan_idx];
+
+        /* While philips SA2400 drive the PA bias from
+         * sa2400, for MAXIM we do this directly from BB */
+        rtl8180_write_phy(dev, 3, txpw);
+
+        max2820_write_phy_antenna(dev, chan);
+        write_max2820(dev, 3, chan);
+}
+
+static void max2820_rf_stop(struct ieee80211_hw *dev)
+{
+        rtl8180_write_phy(dev, 3, 0x8);
+        write_max2820(dev, 1, 0);
+}
+
+
+static void max2820_rf_init(struct ieee80211_hw *dev)
+{
+        struct rtl8180_priv *priv = dev->priv;
+
+        /* MAXIM from netbsd driver */
+        write_max2820(dev, 0, 0x007); /* test mode as indicated in datasheet */
+        write_max2820(dev, 1, 0x01e); /* enable register */
+        write_max2820(dev, 2, 0x001); /* synt register */
+
+        max2820_rf_set_channel(dev, NULL);
+
+        write_max2820(dev, 4, 0x313); /* rx register */
+
+        /* PA is driven directly by the BB, we keep the MAXIM bias
+         * at the highest value in case that setting it to lower
+         * values may introduce some further attenuation somewhere..
+         */
+        write_max2820(dev, 5, 0x00f);
+
+        /* baseband configuration */
+        rtl8180_write_phy(dev, 0, 0x88); /* sys1       */
+        rtl8180_write_phy(dev, 3, 0x08); /* txagc      */
+        rtl8180_write_phy(dev, 4, 0xf8); /* lnadet     */
+        rtl8180_write_phy(dev, 5, 0x90); /* ifagcinit  */
+        rtl8180_write_phy(dev, 6, 0x1a); /* ifagclimit */
+        rtl8180_write_phy(dev, 7, 0x64); /* ifagcdet   */
+
+        max2820_write_phy_antenna(dev, 1);
+
+        rtl8180_write_phy(dev, 0x11, 0x88); /* trl */
+
+        if (rtl818x_ioread8(priv, &priv->map->CONFIG2) &
+            RTL818X_CONFIG2_ANTENNA_DIV)
+                rtl8180_write_phy(dev, 0x12, 0xc7);
+        else
+                rtl8180_write_phy(dev, 0x12, 0x47);
+
+        rtl8180_write_phy(dev, 0x13, 0x9b);
+
+        rtl8180_write_phy(dev, 0x19, 0x0);  /* CHESTLIM */
+        rtl8180_write_phy(dev, 0x1a, 0x9f); /* CHSQLIM  */
+
+        max2820_rf_set_channel(dev, NULL);
+}
+
+const struct rtl818x_rf_ops max2820_rf_ops = {
+        .name           = "Maxim",
+        .init           = max2820_rf_init,
+        .stop           = max2820_rf_stop,
+        .set_chan       = max2820_rf_set_channel
+};