Michael Wu | f653211 | 2007-10-14 14:43:16 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Radio tuning for Maxim max2820 on RTL8180 |
| 3 | * |
| 4 | * Copyright 2007 Andrea Merello <andreamrl@tiscali.it> |
| 5 | * |
| 6 | * Code from the BSD driver and the rtl8181 project have been |
| 7 | * very useful to understand certain things |
| 8 | * |
| 9 | * I want to thanks the Authors of such projects and the Ndiswrapper |
| 10 | * project Authors. |
| 11 | * |
| 12 | * A special Big Thanks also is for all people who donated me cards, |
| 13 | * making possible the creation of the original rtl8180 driver |
| 14 | * from which this code is derived! |
| 15 | * |
| 16 | * This program is free software; you can redistribute it and/or modify |
| 17 | * it under the terms of the GNU General Public License version 2 as |
| 18 | * published by the Free Software Foundation. |
| 19 | */ |
| 20 | |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/pci.h> |
| 23 | #include <linux/delay.h> |
| 24 | #include <net/mac80211.h> |
| 25 | |
| 26 | #include "rtl8180.h" |
| 27 | #include "rtl8180_max2820.h" |
| 28 | |
| 29 | static const u32 max2820_chan[] = { |
| 30 | 12, /* CH 1 */ |
| 31 | 17, |
| 32 | 22, |
| 33 | 27, |
| 34 | 32, |
| 35 | 37, |
| 36 | 42, |
| 37 | 47, |
| 38 | 52, |
| 39 | 57, |
| 40 | 62, |
| 41 | 67, |
| 42 | 72, |
| 43 | 84, /* CH 14 */ |
| 44 | }; |
| 45 | |
| 46 | static void write_max2820(struct ieee80211_hw *dev, u8 addr, u32 data) |
| 47 | { |
| 48 | struct rtl8180_priv *priv = dev->priv; |
| 49 | u32 phy_config; |
| 50 | |
| 51 | phy_config = 0x90 + (data & 0xf); |
| 52 | phy_config <<= 16; |
| 53 | phy_config += addr; |
| 54 | phy_config <<= 8; |
| 55 | phy_config += (data >> 4) & 0xff; |
| 56 | |
| 57 | rtl818x_iowrite32(priv, |
| 58 | (__le32 __iomem *) &priv->map->RFPinsOutput, phy_config); |
| 59 | |
| 60 | msleep(1); |
| 61 | } |
| 62 | |
| 63 | static void max2820_write_phy_antenna(struct ieee80211_hw *dev, short chan) |
| 64 | { |
| 65 | struct rtl8180_priv *priv = dev->priv; |
| 66 | u8 ant; |
| 67 | |
| 68 | ant = MAXIM_ANTENNA; |
| 69 | if (priv->rfparam & RF_PARAM_ANTBDEFAULT) |
| 70 | ant |= BB_ANTENNA_B; |
| 71 | if (chan == 14) |
| 72 | ant |= BB_ANTATTEN_CHAN14; |
| 73 | |
| 74 | rtl8180_write_phy(dev, 0x10, ant); |
| 75 | } |
| 76 | |
| 77 | static void max2820_rf_set_channel(struct ieee80211_hw *dev, |
| 78 | struct ieee80211_conf *conf) |
| 79 | { |
| 80 | struct rtl8180_priv *priv = dev->priv; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 81 | int channel = ieee80211_frequency_to_channel(conf->channel->center_freq); |
| 82 | unsigned int chan_idx = channel - 1; |
| 83 | u32 txpw = priv->channels[chan_idx].hw_value & 0xFF; |
Michael Wu | f653211 | 2007-10-14 14:43:16 -0400 | [diff] [blame] | 84 | u32 chan = max2820_chan[chan_idx]; |
| 85 | |
| 86 | /* While philips SA2400 drive the PA bias from |
| 87 | * sa2400, for MAXIM we do this directly from BB */ |
| 88 | rtl8180_write_phy(dev, 3, txpw); |
| 89 | |
| 90 | max2820_write_phy_antenna(dev, chan); |
| 91 | write_max2820(dev, 3, chan); |
| 92 | } |
| 93 | |
| 94 | static void max2820_rf_stop(struct ieee80211_hw *dev) |
| 95 | { |
| 96 | rtl8180_write_phy(dev, 3, 0x8); |
| 97 | write_max2820(dev, 1, 0); |
| 98 | } |
| 99 | |
| 100 | |
| 101 | static void max2820_rf_init(struct ieee80211_hw *dev) |
| 102 | { |
| 103 | struct rtl8180_priv *priv = dev->priv; |
| 104 | |
| 105 | /* MAXIM from netbsd driver */ |
| 106 | write_max2820(dev, 0, 0x007); /* test mode as indicated in datasheet */ |
| 107 | write_max2820(dev, 1, 0x01e); /* enable register */ |
| 108 | write_max2820(dev, 2, 0x001); /* synt register */ |
| 109 | |
| 110 | max2820_rf_set_channel(dev, NULL); |
| 111 | |
| 112 | write_max2820(dev, 4, 0x313); /* rx register */ |
| 113 | |
| 114 | /* PA is driven directly by the BB, we keep the MAXIM bias |
| 115 | * at the highest value in case that setting it to lower |
| 116 | * values may introduce some further attenuation somewhere.. |
| 117 | */ |
| 118 | write_max2820(dev, 5, 0x00f); |
| 119 | |
| 120 | /* baseband configuration */ |
| 121 | rtl8180_write_phy(dev, 0, 0x88); /* sys1 */ |
| 122 | rtl8180_write_phy(dev, 3, 0x08); /* txagc */ |
| 123 | rtl8180_write_phy(dev, 4, 0xf8); /* lnadet */ |
| 124 | rtl8180_write_phy(dev, 5, 0x90); /* ifagcinit */ |
| 125 | rtl8180_write_phy(dev, 6, 0x1a); /* ifagclimit */ |
| 126 | rtl8180_write_phy(dev, 7, 0x64); /* ifagcdet */ |
| 127 | |
| 128 | max2820_write_phy_antenna(dev, 1); |
| 129 | |
| 130 | rtl8180_write_phy(dev, 0x11, 0x88); /* trl */ |
| 131 | |
| 132 | if (rtl818x_ioread8(priv, &priv->map->CONFIG2) & |
| 133 | RTL818X_CONFIG2_ANTENNA_DIV) |
| 134 | rtl8180_write_phy(dev, 0x12, 0xc7); |
| 135 | else |
| 136 | rtl8180_write_phy(dev, 0x12, 0x47); |
| 137 | |
| 138 | rtl8180_write_phy(dev, 0x13, 0x9b); |
| 139 | |
| 140 | rtl8180_write_phy(dev, 0x19, 0x0); /* CHESTLIM */ |
| 141 | rtl8180_write_phy(dev, 0x1a, 0x9f); /* CHSQLIM */ |
| 142 | |
| 143 | max2820_rf_set_channel(dev, NULL); |
| 144 | } |
| 145 | |
| 146 | const struct rtl818x_rf_ops max2820_rf_ops = { |
| 147 | .name = "Maxim", |
| 148 | .init = max2820_rf_init, |
| 149 | .stop = max2820_rf_stop, |
| 150 | .set_chan = max2820_rf_set_channel |
| 151 | }; |