8406115834
Access to the gpxe.org and etherboot.org domains and associated resources has been revoked by the registrant of the domain. Work around this problem by renaming project from gPXE to iPXE, and updating URLs to match. Also update README, LOG and COPYRIGHTS to remove obsolete information. Signed-off-by: Michael Brown <mcb30@ipxe.org>
159 lines
4.0 KiB
C
159 lines
4.0 KiB
C
/*
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* Radio tuning for Maxim max2820 on RTL8180
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*
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* Copyright 2007 Andrea Merello <andreamrl@tiscali.it>
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*
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* Modified slightly for iPXE, June 2009 by Joshua Oreman.
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*
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* Code from the BSD driver and the rtl8181 project have been
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* very useful to understand certain things
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*
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* I want to thanks the Authors of such projects and the Ndiswrapper
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* project Authors.
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*
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* A special Big Thanks also is for all people who donated me cards,
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* making possible the creation of the original rtl8180 driver
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* from which this code is derived!
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <unistd.h>
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#include <ipxe/pci.h>
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#include <ipxe/net80211.h>
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#include "rtl818x.h"
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FILE_LICENCE(GPL2_ONLY);
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#define MAXIM_ANTENNA 0xb3
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static const u32 max2820_chan[] = {
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12, /* CH 1 */
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17,
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22,
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27,
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32,
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37,
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42,
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47,
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52,
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57,
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62,
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67,
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72,
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84, /* CH 14 */
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};
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static void write_max2820(struct net80211_device *dev, u8 addr, u32 data)
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{
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struct rtl818x_priv *priv = dev->priv;
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u32 phy_config;
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phy_config = 0x90 + (data & 0xf);
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phy_config <<= 16;
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phy_config += addr;
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phy_config <<= 8;
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phy_config += (data >> 4) & 0xff;
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/* This was originally a 32-bit write to a typecast
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RFPinsOutput, but gcc complained about aliasing rules. -JBO */
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rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, phy_config & 0xffff);
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rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, phy_config >> 16);
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mdelay(1);
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}
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static void max2820_write_phy_antenna(struct net80211_device *dev, short chan)
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{
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struct rtl818x_priv *priv = dev->priv;
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u8 ant;
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ant = MAXIM_ANTENNA;
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if (priv->rfparam & RF_PARAM_ANTBDEFAULT)
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ant |= BB_ANTENNA_B;
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if (chan == 14)
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ant |= BB_ANTATTEN_CHAN14;
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rtl818x_write_phy(dev, 0x10, ant);
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}
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static void max2820_rf_set_channel(struct net80211_device *dev,
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struct net80211_channel *channelp)
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{
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struct rtl818x_priv *priv = dev->priv;
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int channel = channelp->channel_nr;
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unsigned int chan_idx = channel - 1;
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u32 txpw = priv->txpower[chan_idx] & 0xFF;
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u32 chan = max2820_chan[chan_idx];
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/* While philips SA2400 drive the PA bias from
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* sa2400, for MAXIM we do this directly from BB */
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rtl818x_write_phy(dev, 3, txpw);
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max2820_write_phy_antenna(dev, channel);
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write_max2820(dev, 3, chan);
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}
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static void max2820_rf_stop(struct net80211_device *dev)
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{
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rtl818x_write_phy(dev, 3, 0x8);
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write_max2820(dev, 1, 0);
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}
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static void max2820_rf_init(struct net80211_device *dev)
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{
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struct rtl818x_priv *priv = dev->priv;
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/* MAXIM from netbsd driver */
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write_max2820(dev, 0, 0x007); /* test mode as indicated in datasheet */
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write_max2820(dev, 1, 0x01e); /* enable register */
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write_max2820(dev, 2, 0x001); /* synt register */
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max2820_rf_set_channel(dev, NULL);
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write_max2820(dev, 4, 0x313); /* rx register */
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/* PA is driven directly by the BB, we keep the MAXIM bias
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* at the highest value in case that setting it to lower
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* values may introduce some further attenuation somewhere..
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*/
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write_max2820(dev, 5, 0x00f);
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/* baseband configuration */
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rtl818x_write_phy(dev, 0, 0x88); /* sys1 */
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rtl818x_write_phy(dev, 3, 0x08); /* txagc */
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rtl818x_write_phy(dev, 4, 0xf8); /* lnadet */
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rtl818x_write_phy(dev, 5, 0x90); /* ifagcinit */
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rtl818x_write_phy(dev, 6, 0x1a); /* ifagclimit */
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rtl818x_write_phy(dev, 7, 0x64); /* ifagcdet */
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max2820_write_phy_antenna(dev, 1);
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rtl818x_write_phy(dev, 0x11, 0x88); /* trl */
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if (rtl818x_ioread8(priv, &priv->map->CONFIG2) &
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RTL818X_CONFIG2_ANTENNA_DIV)
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rtl818x_write_phy(dev, 0x12, 0xc7);
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else
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rtl818x_write_phy(dev, 0x12, 0x47);
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rtl818x_write_phy(dev, 0x13, 0x9b);
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rtl818x_write_phy(dev, 0x19, 0x0); /* CHESTLIM */
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rtl818x_write_phy(dev, 0x1a, 0x9f); /* CHSQLIM */
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max2820_rf_set_channel(dev, NULL);
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}
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struct rtl818x_rf_ops max2820_rf_ops __rtl818x_rf_driver = {
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.name = "Maxim max2820",
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.id = 4,
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.init = max2820_rf_init,
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.stop = max2820_rf_stop,
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.set_chan = max2820_rf_set_channel
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};
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