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0a0ab41e83
The max2820 RF code needs to invoke max2820_write_phy_antenna every time the channel is being switch. This should be done passing the channel number to that function. Incorrectly we were passing the same value that is written on the channel RF register. This may cause problems when operating on ch 14. This patch fixes it. Thanks to Alessandro Di Marco who found this issue! Signed-off-by: Andrea Merello <andreamrl@tiscali.it> Signed-off-by: John W. Linville <linville@tuxdriver.com>
153 lines
3.8 KiB
C
153 lines
3.8 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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* 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 <linux/init.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <net/mac80211.h>
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#include "rtl8180.h"
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#include "rtl8180_max2820.h"
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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 ieee80211_hw *dev, u8 addr, u32 data)
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{
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struct rtl8180_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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rtl818x_iowrite32(priv,
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(__le32 __iomem *) &priv->map->RFPinsOutput, phy_config);
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msleep(1);
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}
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static void max2820_write_phy_antenna(struct ieee80211_hw *dev, short chan)
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{
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struct rtl8180_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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rtl8180_write_phy(dev, 0x10, ant);
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}
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static void max2820_rf_set_channel(struct ieee80211_hw *dev,
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struct ieee80211_conf *conf)
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{
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struct rtl8180_priv *priv = dev->priv;
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int channel = conf ?
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ieee80211_frequency_to_channel(conf->channel->center_freq) : 1;
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unsigned int chan_idx = channel - 1;
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u32 txpw = priv->channels[chan_idx].hw_value & 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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rtl8180_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 ieee80211_hw *dev)
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{
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rtl8180_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 ieee80211_hw *dev)
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{
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struct rtl8180_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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rtl8180_write_phy(dev, 0, 0x88); /* sys1 */
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rtl8180_write_phy(dev, 3, 0x08); /* txagc */
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rtl8180_write_phy(dev, 4, 0xf8); /* lnadet */
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rtl8180_write_phy(dev, 5, 0x90); /* ifagcinit */
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rtl8180_write_phy(dev, 6, 0x1a); /* ifagclimit */
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rtl8180_write_phy(dev, 7, 0x64); /* ifagcdet */
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max2820_write_phy_antenna(dev, 1);
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rtl8180_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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rtl8180_write_phy(dev, 0x12, 0xc7);
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else
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rtl8180_write_phy(dev, 0x12, 0x47);
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rtl8180_write_phy(dev, 0x13, 0x9b);
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rtl8180_write_phy(dev, 0x19, 0x0); /* CHESTLIM */
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rtl8180_write_phy(dev, 0x1a, 0x9f); /* CHSQLIM */
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max2820_rf_set_channel(dev, NULL);
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}
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const struct rtl818x_rf_ops max2820_rf_ops = {
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.name = "Maxim",
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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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