/* * 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; int channel = ieee80211_frequency_to_channel(conf->channel->center_freq); 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, 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 };