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Diffstat (limited to 'gpxe/src/drivers/net/rtl818x/rtl8180_max2820.c')
-rw-r--r--gpxe/src/drivers/net/rtl818x/rtl8180_max2820.c158
1 files changed, 158 insertions, 0 deletions
diff --git a/gpxe/src/drivers/net/rtl818x/rtl8180_max2820.c b/gpxe/src/drivers/net/rtl818x/rtl8180_max2820.c
new file mode 100644
index 00000000..7c9495f9
--- /dev/null
+++ b/gpxe/src/drivers/net/rtl818x/rtl8180_max2820.c
@@ -0,0 +1,158 @@
+/*
+ * Radio tuning for Maxim max2820 on RTL8180
+ *
+ * Copyright 2007 Andrea Merello <andreamrl@tiscali.it>
+ *
+ * Modified slightly for gPXE, June 2009 by Joshua Oreman.
+ *
+ * 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 <unistd.h>
+#include <gpxe/pci.h>
+#include <gpxe/net80211.h>
+
+#include "rtl818x.h"
+
+FILE_LICENCE(GPL2_ONLY);
+
+#define MAXIM_ANTENNA 0xb3
+
+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 net80211_device *dev, u8 addr, u32 data)
+{
+ struct rtl818x_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;
+
+ /* This was originally a 32-bit write to a typecast
+ RFPinsOutput, but gcc complained about aliasing rules. -JBO */
+ rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, phy_config & 0xffff);
+ rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, phy_config >> 16);
+
+ mdelay(1);
+}
+
+static void max2820_write_phy_antenna(struct net80211_device *dev, short chan)
+{
+ struct rtl818x_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;
+
+ rtl818x_write_phy(dev, 0x10, ant);
+}
+
+static void max2820_rf_set_channel(struct net80211_device *dev,
+ struct net80211_channel *channelp)
+{
+ struct rtl818x_priv *priv = dev->priv;
+ int channel = channelp->channel_nr;
+ unsigned int chan_idx = channel - 1;
+ u32 txpw = priv->txpower[chan_idx] & 0xFF;
+ u32 chan = max2820_chan[chan_idx];
+
+ /* While philips SA2400 drive the PA bias from
+ * sa2400, for MAXIM we do this directly from BB */
+ rtl818x_write_phy(dev, 3, txpw);
+
+ max2820_write_phy_antenna(dev, channel);
+ write_max2820(dev, 3, chan);
+}
+
+static void max2820_rf_stop(struct net80211_device *dev)
+{
+ rtl818x_write_phy(dev, 3, 0x8);
+ write_max2820(dev, 1, 0);
+}
+
+
+static void max2820_rf_init(struct net80211_device *dev)
+{
+ struct rtl818x_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 */
+ rtl818x_write_phy(dev, 0, 0x88); /* sys1 */
+ rtl818x_write_phy(dev, 3, 0x08); /* txagc */
+ rtl818x_write_phy(dev, 4, 0xf8); /* lnadet */
+ rtl818x_write_phy(dev, 5, 0x90); /* ifagcinit */
+ rtl818x_write_phy(dev, 6, 0x1a); /* ifagclimit */
+ rtl818x_write_phy(dev, 7, 0x64); /* ifagcdet */
+
+ max2820_write_phy_antenna(dev, 1);
+
+ rtl818x_write_phy(dev, 0x11, 0x88); /* trl */
+
+ if (rtl818x_ioread8(priv, &priv->map->CONFIG2) &
+ RTL818X_CONFIG2_ANTENNA_DIV)
+ rtl818x_write_phy(dev, 0x12, 0xc7);
+ else
+ rtl818x_write_phy(dev, 0x12, 0x47);
+
+ rtl818x_write_phy(dev, 0x13, 0x9b);
+
+ rtl818x_write_phy(dev, 0x19, 0x0); /* CHESTLIM */
+ rtl818x_write_phy(dev, 0x1a, 0x9f); /* CHSQLIM */
+
+ max2820_rf_set_channel(dev, NULL);
+}
+
+struct rtl818x_rf_ops max2820_rf_ops __rtl818x_rf_driver = {
+ .name = "Maxim max2820",
+ .id = 4,
+ .init = max2820_rf_init,
+ .stop = max2820_rf_stop,
+ .set_chan = max2820_rf_set_channel
+};