| /* |
| * 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 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->channel->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, |
| }; |