Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / net / wireless / rtl818x / rtl8180 / max2820.c

diff --git a/kernel/drivers/net/wireless/rtl818x/rtl8180/max2820.c b/kernel/drivers/net/wireless/rtl818x/rtl8180/max2820.c
new file mode 100644 (file)
index 0000000..eebf239
--- /dev/null
+++ b/kernel/drivers/net/wireless/rtl818x/rtl8180/max2820.c
@@ -0,0 +1,168 @@
+/*
+ * Radio tuning for Maxim max2820 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 "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 u8 max2820_rf_calc_rssi(u8 agc, u8 sq)
+{
+       bool odd;
+
+       odd = !!(agc & 1);
+
+       agc >>= 1;
+       if (odd)
+               agc += 76;
+       else
+               agc += 66;
+
+       /* TODO: change addends above to avoid mult / div below */
+       return 65 * agc / 100;
+}
+
+static void max2820_rf_set_channel(struct ieee80211_hw *dev,
+                                  struct ieee80211_conf *conf)
+{
+       struct rtl8180_priv *priv = dev->priv;
+       int channel = conf ?
+               ieee80211_frequency_to_channel(conf->chandef.chan->center_freq) : 1;
+       unsigned int chan_idx = channel - 1;
+       u32 txpw = priv->channels[chan_idx].hw_value & 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, channel);
+       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,
+       .calc_rssi      = max2820_rf_calc_rssi,
+};