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b43: N-PHY: adjust gain table 

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rafał Miłecki 2010-02-27 13:03:38 +01:00 committed by John W. Linville
parent 902db91d96
commit d24019adaa
1 changed files with 57 additions and 1 deletions
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58
drivers/net/wireless/b43/phy_n.c
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@ -837,6 +837,62 @@ static void b43_nphy_spur_workaround(struct b43_wldev *dev)
b43_nphy_stay_in_carrier_search(dev, 0);
}
/* http://bcm-v4.sipsolutions.net/802.11/PHY/N/AdjustLnaGainTbl */
static void b43_nphy_adjust_lna_gain_table(struct b43_wldev *dev)
{
struct b43_phy_n *nphy = dev->phy.n;
u8 i;
s16 tmp;
u16 data[4];
s16 gain[2];
u16 minmax[2];
u16 lna_gain[4] = { -2, 10, 19, 25 };
if (nphy->hang_avoid)
b43_nphy_stay_in_carrier_search(dev, 1);
if (nphy->gain_boost) {
if (b43_current_band(dev->wl) == IEEE80211_BAND_2GHZ) {
gain[0] = 6;
gain[1] = 6;
} else {
tmp = 40370 - 315 * nphy->radio_chanspec.channel;
gain[0] = ((tmp >> 13) + ((tmp >> 12) & 1));
tmp = 23242 - 224 * nphy->radio_chanspec.channel;
gain[1] = ((tmp >> 13) + ((tmp >> 12) & 1));
}
} else {
gain[0] = 0;
gain[1] = 0;
}
for (i = 0; i < 2; i++) {
if (nphy->elna_gain_config) {
data[0] = 19 + gain[i];
data[1] = 25 + gain[i];
data[2] = 25 + gain[i];
data[3] = 25 + gain[i];
} else {
data[0] = lna_gain[0] + gain[i];
data[1] = lna_gain[1] + gain[i];
data[2] = lna_gain[2] + gain[i];
data[3] = lna_gain[3] + gain[i];
}
b43_ntab_write_bulk(dev, B43_NTAB16(10, 8), 4, data);
minmax[i] = 23 + gain[i];
}
b43_phy_maskset(dev, B43_NPHY_C1_MINMAX_GAIN, ~B43_NPHY_C1_MINGAIN,
minmax[0] << B43_NPHY_C1_MINGAIN_SHIFT);
b43_phy_maskset(dev, B43_NPHY_C2_MINMAX_GAIN, ~B43_NPHY_C2_MINGAIN,
minmax[1] << B43_NPHY_C2_MINGAIN_SHIFT);
if (nphy->hang_avoid)
b43_nphy_stay_in_carrier_search(dev, 0);
}
/* http://bcm-v4.sipsolutions.net/802.11/PHY/N/WorkaroundsGainCtrl */
static void b43_nphy_gain_crtl_workarounds(struct b43_wldev *dev)
{
@ -921,7 +977,7 @@ static void b43_nphy_gain_crtl_workarounds(struct b43_wldev *dev)
b43_phy_write(dev, B43_NPHY_TABLE_DATALO,
(code << 8 | 0x7C));
/* TODO: b43_nphy_adjust_lna_gain_table(dev); */
b43_nphy_adjust_lna_gain_table(dev);
if (nphy->elna_gain_config) {
b43_phy_write(dev, B43_NPHY_TABLE_ADDR, 0x0808);