![Rusty Russell](/assets/img/avatar_default.png)
DaveM said: Please, this kind of stuff rots forever and not using bool properly drives me crazy. Joe Perches <joe@perches.com> gave me the spatch script: @@ bool b; @@ -b = 0 +b = false @@ bool b; @@ -b = 1 +b = true I merely installed coccinelle, read the documentation and took credit. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
1017 lines
27 KiB
C
1017 lines
27 KiB
C
/*
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Broadcom B43 wireless driver
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G PHY LO (LocalOscillator) Measuring and Control routines
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Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
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Copyright (c) 2005, 2006 Stefano Brivio <stefano.brivio@polimi.it>
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Copyright (c) 2005-2007 Michael Buesch <m@bues.ch>
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Copyright (c) 2005, 2006 Danny van Dyk <kugelfang@gentoo.org>
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Copyright (c) 2005, 2006 Andreas Jaggi <andreas.jaggi@waterwave.ch>
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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 as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include "b43.h"
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#include "lo.h"
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#include "phy_g.h"
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#include "main.h"
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#include <linux/delay.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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static struct b43_lo_calib *b43_find_lo_calib(struct b43_txpower_lo_control *lo,
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const struct b43_bbatt *bbatt,
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const struct b43_rfatt *rfatt)
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{
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struct b43_lo_calib *c;
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list_for_each_entry(c, &lo->calib_list, list) {
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if (!b43_compare_bbatt(&c->bbatt, bbatt))
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continue;
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if (!b43_compare_rfatt(&c->rfatt, rfatt))
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continue;
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return c;
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}
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return NULL;
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}
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/* Write the LocalOscillator Control (adjust) value-pair. */
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static void b43_lo_write(struct b43_wldev *dev, struct b43_loctl *control)
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{
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struct b43_phy *phy = &dev->phy;
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u16 value;
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if (B43_DEBUG) {
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if (unlikely(abs(control->i) > 16 || abs(control->q) > 16)) {
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b43dbg(dev->wl, "Invalid LO control pair "
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"(I: %d, Q: %d)\n", control->i, control->q);
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dump_stack();
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return;
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}
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}
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B43_WARN_ON(phy->type != B43_PHYTYPE_G);
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value = (u8) (control->q);
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value |= ((u8) (control->i)) << 8;
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b43_phy_write(dev, B43_PHY_LO_CTL, value);
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}
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static u16 lo_measure_feedthrough(struct b43_wldev *dev,
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u16 lna, u16 pga, u16 trsw_rx)
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{
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struct b43_phy *phy = &dev->phy;
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u16 rfover;
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u16 feedthrough;
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if (phy->gmode) {
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lna <<= B43_PHY_RFOVERVAL_LNA_SHIFT;
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pga <<= B43_PHY_RFOVERVAL_PGA_SHIFT;
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B43_WARN_ON(lna & ~B43_PHY_RFOVERVAL_LNA);
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B43_WARN_ON(pga & ~B43_PHY_RFOVERVAL_PGA);
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/*FIXME This assertion fails B43_WARN_ON(trsw_rx & ~(B43_PHY_RFOVERVAL_TRSWRX |
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B43_PHY_RFOVERVAL_BW));
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*/
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trsw_rx &= (B43_PHY_RFOVERVAL_TRSWRX | B43_PHY_RFOVERVAL_BW);
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/* Construct the RF Override Value */
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rfover = B43_PHY_RFOVERVAL_UNK;
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rfover |= pga;
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rfover |= lna;
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rfover |= trsw_rx;
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if ((dev->dev->bus_sprom->boardflags_lo & B43_BFL_EXTLNA)
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&& phy->rev > 6)
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rfover |= B43_PHY_RFOVERVAL_EXTLNA;
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b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
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b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
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udelay(10);
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rfover |= B43_PHY_RFOVERVAL_BW_LBW;
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b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
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udelay(10);
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rfover |= B43_PHY_RFOVERVAL_BW_LPF;
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b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
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udelay(10);
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b43_phy_write(dev, B43_PHY_PGACTL, 0xF300);
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} else {
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pga |= B43_PHY_PGACTL_UNKNOWN;
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b43_phy_write(dev, B43_PHY_PGACTL, pga);
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udelay(10);
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pga |= B43_PHY_PGACTL_LOWBANDW;
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b43_phy_write(dev, B43_PHY_PGACTL, pga);
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udelay(10);
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pga |= B43_PHY_PGACTL_LPF;
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b43_phy_write(dev, B43_PHY_PGACTL, pga);
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}
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udelay(21);
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feedthrough = b43_phy_read(dev, B43_PHY_LO_LEAKAGE);
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/* This is a good place to check if we need to relax a bit,
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* as this is the main function called regularly
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* in the LO calibration. */
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cond_resched();
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return feedthrough;
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}
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/* TXCTL Register and Value Table.
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* Returns the "TXCTL Register".
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* "value" is the "TXCTL Value".
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* "pad_mix_gain" is the PAD Mixer Gain.
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*/
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static u16 lo_txctl_register_table(struct b43_wldev *dev,
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u16 *value, u16 *pad_mix_gain)
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{
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struct b43_phy *phy = &dev->phy;
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u16 reg, v, padmix;
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if (phy->type == B43_PHYTYPE_B) {
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v = 0x30;
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if (phy->radio_rev <= 5) {
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reg = 0x43;
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padmix = 0;
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} else {
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reg = 0x52;
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padmix = 5;
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}
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} else {
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if (phy->rev >= 2 && phy->radio_rev == 8) {
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reg = 0x43;
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v = 0x10;
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padmix = 2;
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} else {
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reg = 0x52;
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v = 0x30;
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padmix = 5;
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}
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}
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if (value)
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*value = v;
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if (pad_mix_gain)
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*pad_mix_gain = padmix;
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return reg;
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}
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static void lo_measure_txctl_values(struct b43_wldev *dev)
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{
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struct b43_phy *phy = &dev->phy;
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struct b43_phy_g *gphy = phy->g;
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struct b43_txpower_lo_control *lo = gphy->lo_control;
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u16 reg, mask;
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u16 trsw_rx, pga;
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u16 radio_pctl_reg;
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static const u8 tx_bias_values[] = {
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0x09, 0x08, 0x0A, 0x01, 0x00,
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0x02, 0x05, 0x04, 0x06,
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};
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static const u8 tx_magn_values[] = {
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0x70, 0x40,
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};
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if (!has_loopback_gain(phy)) {
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radio_pctl_reg = 6;
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trsw_rx = 2;
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pga = 0;
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} else {
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int lb_gain; /* Loopback gain (in dB) */
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trsw_rx = 0;
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lb_gain = gphy->max_lb_gain / 2;
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if (lb_gain > 10) {
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radio_pctl_reg = 0;
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pga = abs(10 - lb_gain) / 6;
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pga = clamp_val(pga, 0, 15);
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} else {
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int cmp_val;
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int tmp;
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pga = 0;
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cmp_val = 0x24;
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if ((phy->rev >= 2) &&
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(phy->radio_ver == 0x2050) && (phy->radio_rev == 8))
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cmp_val = 0x3C;
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tmp = lb_gain;
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if ((10 - lb_gain) < cmp_val)
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tmp = (10 - lb_gain);
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if (tmp < 0)
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tmp += 6;
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else
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tmp += 3;
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cmp_val /= 4;
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tmp /= 4;
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if (tmp >= cmp_val)
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radio_pctl_reg = cmp_val;
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else
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radio_pctl_reg = tmp;
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}
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}
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b43_radio_maskset(dev, 0x43, 0xFFF0, radio_pctl_reg);
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b43_gphy_set_baseband_attenuation(dev, 2);
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reg = lo_txctl_register_table(dev, &mask, NULL);
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mask = ~mask;
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b43_radio_mask(dev, reg, mask);
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if (has_tx_magnification(phy)) {
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int i, j;
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int feedthrough;
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int min_feedth = 0xFFFF;
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u8 tx_magn, tx_bias;
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for (i = 0; i < ARRAY_SIZE(tx_magn_values); i++) {
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tx_magn = tx_magn_values[i];
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b43_radio_maskset(dev, 0x52, 0xFF0F, tx_magn);
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for (j = 0; j < ARRAY_SIZE(tx_bias_values); j++) {
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tx_bias = tx_bias_values[j];
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b43_radio_maskset(dev, 0x52, 0xFFF0, tx_bias);
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feedthrough =
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lo_measure_feedthrough(dev, 0, pga,
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trsw_rx);
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if (feedthrough < min_feedth) {
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lo->tx_bias = tx_bias;
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lo->tx_magn = tx_magn;
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min_feedth = feedthrough;
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}
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if (lo->tx_bias == 0)
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break;
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}
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b43_radio_write16(dev, 0x52,
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(b43_radio_read16(dev, 0x52)
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& 0xFF00) | lo->tx_bias | lo->
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tx_magn);
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}
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} else {
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lo->tx_magn = 0;
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lo->tx_bias = 0;
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b43_radio_mask(dev, 0x52, 0xFFF0); /* TX bias == 0 */
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}
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lo->txctl_measured_time = jiffies;
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}
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static void lo_read_power_vector(struct b43_wldev *dev)
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{
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struct b43_phy *phy = &dev->phy;
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struct b43_phy_g *gphy = phy->g;
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struct b43_txpower_lo_control *lo = gphy->lo_control;
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int i;
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u64 tmp;
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u64 power_vector = 0;
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for (i = 0; i < 8; i += 2) {
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tmp = b43_shm_read16(dev, B43_SHM_SHARED, 0x310 + i);
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power_vector |= (tmp << (i * 8));
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/* Clear the vector on the device. */
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b43_shm_write16(dev, B43_SHM_SHARED, 0x310 + i, 0);
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}
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if (power_vector)
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lo->power_vector = power_vector;
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lo->pwr_vec_read_time = jiffies;
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}
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/* 802.11/LO/GPHY/MeasuringGains */
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static void lo_measure_gain_values(struct b43_wldev *dev,
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s16 max_rx_gain, int use_trsw_rx)
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{
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struct b43_phy *phy = &dev->phy;
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struct b43_phy_g *gphy = phy->g;
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u16 tmp;
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if (max_rx_gain < 0)
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max_rx_gain = 0;
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if (has_loopback_gain(phy)) {
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int trsw_rx_gain;
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if (use_trsw_rx) {
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trsw_rx_gain = gphy->trsw_rx_gain / 2;
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if (max_rx_gain >= trsw_rx_gain) {
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trsw_rx_gain = max_rx_gain - trsw_rx_gain;
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}
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} else
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trsw_rx_gain = max_rx_gain;
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if (trsw_rx_gain < 9) {
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gphy->lna_lod_gain = 0;
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} else {
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gphy->lna_lod_gain = 1;
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trsw_rx_gain -= 8;
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}
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trsw_rx_gain = clamp_val(trsw_rx_gain, 0, 0x2D);
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gphy->pga_gain = trsw_rx_gain / 3;
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if (gphy->pga_gain >= 5) {
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gphy->pga_gain -= 5;
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gphy->lna_gain = 2;
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} else
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gphy->lna_gain = 0;
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} else {
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gphy->lna_gain = 0;
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gphy->trsw_rx_gain = 0x20;
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if (max_rx_gain >= 0x14) {
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gphy->lna_lod_gain = 1;
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gphy->pga_gain = 2;
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} else if (max_rx_gain >= 0x12) {
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gphy->lna_lod_gain = 1;
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gphy->pga_gain = 1;
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} else if (max_rx_gain >= 0xF) {
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gphy->lna_lod_gain = 1;
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gphy->pga_gain = 0;
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} else {
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gphy->lna_lod_gain = 0;
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gphy->pga_gain = 0;
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}
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}
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tmp = b43_radio_read16(dev, 0x7A);
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if (gphy->lna_lod_gain == 0)
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tmp &= ~0x0008;
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else
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tmp |= 0x0008;
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b43_radio_write16(dev, 0x7A, tmp);
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}
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struct lo_g_saved_values {
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u8 old_channel;
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/* Core registers */
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u16 reg_3F4;
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u16 reg_3E2;
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/* PHY registers */
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u16 phy_lo_mask;
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u16 phy_extg_01;
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u16 phy_dacctl_hwpctl;
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u16 phy_dacctl;
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u16 phy_cck_14;
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u16 phy_hpwr_tssictl;
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u16 phy_analogover;
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u16 phy_analogoverval;
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u16 phy_rfover;
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u16 phy_rfoverval;
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u16 phy_classctl;
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u16 phy_cck_3E;
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u16 phy_crs0;
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u16 phy_pgactl;
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u16 phy_cck_2A;
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u16 phy_syncctl;
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u16 phy_cck_30;
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u16 phy_cck_06;
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/* Radio registers */
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u16 radio_43;
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u16 radio_7A;
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u16 radio_52;
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};
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static void lo_measure_setup(struct b43_wldev *dev,
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struct lo_g_saved_values *sav)
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{
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struct ssb_sprom *sprom = dev->dev->bus_sprom;
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struct b43_phy *phy = &dev->phy;
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struct b43_phy_g *gphy = phy->g;
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struct b43_txpower_lo_control *lo = gphy->lo_control;
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u16 tmp;
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if (b43_has_hardware_pctl(dev)) {
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sav->phy_lo_mask = b43_phy_read(dev, B43_PHY_LO_MASK);
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sav->phy_extg_01 = b43_phy_read(dev, B43_PHY_EXTG(0x01));
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sav->phy_dacctl_hwpctl = b43_phy_read(dev, B43_PHY_DACCTL);
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sav->phy_cck_14 = b43_phy_read(dev, B43_PHY_CCK(0x14));
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sav->phy_hpwr_tssictl = b43_phy_read(dev, B43_PHY_HPWR_TSSICTL);
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b43_phy_set(dev, B43_PHY_HPWR_TSSICTL, 0x100);
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b43_phy_set(dev, B43_PHY_EXTG(0x01), 0x40);
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b43_phy_set(dev, B43_PHY_DACCTL, 0x40);
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b43_phy_set(dev, B43_PHY_CCK(0x14), 0x200);
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}
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if (phy->type == B43_PHYTYPE_B &&
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phy->radio_ver == 0x2050 && phy->radio_rev < 6) {
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b43_phy_write(dev, B43_PHY_CCK(0x16), 0x410);
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b43_phy_write(dev, B43_PHY_CCK(0x17), 0x820);
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}
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if (phy->rev >= 2) {
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sav->phy_analogover = b43_phy_read(dev, B43_PHY_ANALOGOVER);
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sav->phy_analogoverval =
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b43_phy_read(dev, B43_PHY_ANALOGOVERVAL);
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sav->phy_rfover = b43_phy_read(dev, B43_PHY_RFOVER);
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sav->phy_rfoverval = b43_phy_read(dev, B43_PHY_RFOVERVAL);
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sav->phy_classctl = b43_phy_read(dev, B43_PHY_CLASSCTL);
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sav->phy_cck_3E = b43_phy_read(dev, B43_PHY_CCK(0x3E));
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sav->phy_crs0 = b43_phy_read(dev, B43_PHY_CRS0);
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b43_phy_mask(dev, B43_PHY_CLASSCTL, 0xFFFC);
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b43_phy_mask(dev, B43_PHY_CRS0, 0x7FFF);
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b43_phy_set(dev, B43_PHY_ANALOGOVER, 0x0003);
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b43_phy_mask(dev, B43_PHY_ANALOGOVERVAL, 0xFFFC);
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if (phy->type == B43_PHYTYPE_G) {
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if ((phy->rev >= 7) &&
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(sprom->boardflags_lo & B43_BFL_EXTLNA)) {
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b43_phy_write(dev, B43_PHY_RFOVER, 0x933);
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} else {
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b43_phy_write(dev, B43_PHY_RFOVER, 0x133);
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}
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} else {
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b43_phy_write(dev, B43_PHY_RFOVER, 0);
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}
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b43_phy_write(dev, B43_PHY_CCK(0x3E), 0);
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}
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sav->reg_3F4 = b43_read16(dev, 0x3F4);
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sav->reg_3E2 = b43_read16(dev, 0x3E2);
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sav->radio_43 = b43_radio_read16(dev, 0x43);
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sav->radio_7A = b43_radio_read16(dev, 0x7A);
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sav->phy_pgactl = b43_phy_read(dev, B43_PHY_PGACTL);
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sav->phy_cck_2A = b43_phy_read(dev, B43_PHY_CCK(0x2A));
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sav->phy_syncctl = b43_phy_read(dev, B43_PHY_SYNCCTL);
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sav->phy_dacctl = b43_phy_read(dev, B43_PHY_DACCTL);
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if (!has_tx_magnification(phy)) {
|
|
sav->radio_52 = b43_radio_read16(dev, 0x52);
|
|
sav->radio_52 &= 0x00F0;
|
|
}
|
|
if (phy->type == B43_PHYTYPE_B) {
|
|
sav->phy_cck_30 = b43_phy_read(dev, B43_PHY_CCK(0x30));
|
|
sav->phy_cck_06 = b43_phy_read(dev, B43_PHY_CCK(0x06));
|
|
b43_phy_write(dev, B43_PHY_CCK(0x30), 0x00FF);
|
|
b43_phy_write(dev, B43_PHY_CCK(0x06), 0x3F3F);
|
|
} else {
|
|
b43_write16(dev, 0x3E2, b43_read16(dev, 0x3E2)
|
|
| 0x8000);
|
|
}
|
|
b43_write16(dev, 0x3F4, b43_read16(dev, 0x3F4)
|
|
& 0xF000);
|
|
|
|
tmp =
|
|
(phy->type == B43_PHYTYPE_G) ? B43_PHY_LO_MASK : B43_PHY_CCK(0x2E);
|
|
b43_phy_write(dev, tmp, 0x007F);
|
|
|
|
tmp = sav->phy_syncctl;
|
|
b43_phy_write(dev, B43_PHY_SYNCCTL, tmp & 0xFF7F);
|
|
tmp = sav->radio_7A;
|
|
b43_radio_write16(dev, 0x007A, tmp & 0xFFF0);
|
|
|
|
b43_phy_write(dev, B43_PHY_CCK(0x2A), 0x8A3);
|
|
if (phy->type == B43_PHYTYPE_G ||
|
|
(phy->type == B43_PHYTYPE_B &&
|
|
phy->radio_ver == 0x2050 && phy->radio_rev >= 6)) {
|
|
b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x1003);
|
|
} else
|
|
b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x0802);
|
|
if (phy->rev >= 2)
|
|
b43_dummy_transmission(dev, false, true);
|
|
b43_gphy_channel_switch(dev, 6, 0);
|
|
b43_radio_read16(dev, 0x51); /* dummy read */
|
|
if (phy->type == B43_PHYTYPE_G)
|
|
b43_phy_write(dev, B43_PHY_CCK(0x2F), 0);
|
|
|
|
/* Re-measure the txctl values, if needed. */
|
|
if (time_before(lo->txctl_measured_time,
|
|
jiffies - B43_LO_TXCTL_EXPIRE))
|
|
lo_measure_txctl_values(dev);
|
|
|
|
if (phy->type == B43_PHYTYPE_G && phy->rev >= 3) {
|
|
b43_phy_write(dev, B43_PHY_LO_MASK, 0xC078);
|
|
} else {
|
|
if (phy->type == B43_PHYTYPE_B)
|
|
b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
|
|
else
|
|
b43_phy_write(dev, B43_PHY_LO_MASK, 0x8078);
|
|
}
|
|
}
|
|
|
|
static void lo_measure_restore(struct b43_wldev *dev,
|
|
struct lo_g_saved_values *sav)
|
|
{
|
|
struct b43_phy *phy = &dev->phy;
|
|
struct b43_phy_g *gphy = phy->g;
|
|
u16 tmp;
|
|
|
|
if (phy->rev >= 2) {
|
|
b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
|
|
tmp = (gphy->pga_gain << 8);
|
|
b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA0);
|
|
udelay(5);
|
|
b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA2);
|
|
udelay(2);
|
|
b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA3);
|
|
} else {
|
|
tmp = (gphy->pga_gain | 0xEFA0);
|
|
b43_phy_write(dev, B43_PHY_PGACTL, tmp);
|
|
}
|
|
if (phy->type == B43_PHYTYPE_G) {
|
|
if (phy->rev >= 3)
|
|
b43_phy_write(dev, B43_PHY_CCK(0x2E), 0xC078);
|
|
else
|
|
b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
|
|
if (phy->rev >= 2)
|
|
b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0202);
|
|
else
|
|
b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0101);
|
|
}
|
|
b43_write16(dev, 0x3F4, sav->reg_3F4);
|
|
b43_phy_write(dev, B43_PHY_PGACTL, sav->phy_pgactl);
|
|
b43_phy_write(dev, B43_PHY_CCK(0x2A), sav->phy_cck_2A);
|
|
b43_phy_write(dev, B43_PHY_SYNCCTL, sav->phy_syncctl);
|
|
b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl);
|
|
b43_radio_write16(dev, 0x43, sav->radio_43);
|
|
b43_radio_write16(dev, 0x7A, sav->radio_7A);
|
|
if (!has_tx_magnification(phy)) {
|
|
tmp = sav->radio_52;
|
|
b43_radio_maskset(dev, 0x52, 0xFF0F, tmp);
|
|
}
|
|
b43_write16(dev, 0x3E2, sav->reg_3E2);
|
|
if (phy->type == B43_PHYTYPE_B &&
|
|
phy->radio_ver == 0x2050 && phy->radio_rev <= 5) {
|
|
b43_phy_write(dev, B43_PHY_CCK(0x30), sav->phy_cck_30);
|
|
b43_phy_write(dev, B43_PHY_CCK(0x06), sav->phy_cck_06);
|
|
}
|
|
if (phy->rev >= 2) {
|
|
b43_phy_write(dev, B43_PHY_ANALOGOVER, sav->phy_analogover);
|
|
b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
|
|
sav->phy_analogoverval);
|
|
b43_phy_write(dev, B43_PHY_CLASSCTL, sav->phy_classctl);
|
|
b43_phy_write(dev, B43_PHY_RFOVER, sav->phy_rfover);
|
|
b43_phy_write(dev, B43_PHY_RFOVERVAL, sav->phy_rfoverval);
|
|
b43_phy_write(dev, B43_PHY_CCK(0x3E), sav->phy_cck_3E);
|
|
b43_phy_write(dev, B43_PHY_CRS0, sav->phy_crs0);
|
|
}
|
|
if (b43_has_hardware_pctl(dev)) {
|
|
tmp = (sav->phy_lo_mask & 0xBFFF);
|
|
b43_phy_write(dev, B43_PHY_LO_MASK, tmp);
|
|
b43_phy_write(dev, B43_PHY_EXTG(0x01), sav->phy_extg_01);
|
|
b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl_hwpctl);
|
|
b43_phy_write(dev, B43_PHY_CCK(0x14), sav->phy_cck_14);
|
|
b43_phy_write(dev, B43_PHY_HPWR_TSSICTL, sav->phy_hpwr_tssictl);
|
|
}
|
|
b43_gphy_channel_switch(dev, sav->old_channel, 1);
|
|
}
|
|
|
|
struct b43_lo_g_statemachine {
|
|
int current_state;
|
|
int nr_measured;
|
|
int state_val_multiplier;
|
|
u16 lowest_feedth;
|
|
struct b43_loctl min_loctl;
|
|
};
|
|
|
|
/* Loop over each possible value in this state. */
|
|
static int lo_probe_possible_loctls(struct b43_wldev *dev,
|
|
struct b43_loctl *probe_loctl,
|
|
struct b43_lo_g_statemachine *d)
|
|
{
|
|
struct b43_phy *phy = &dev->phy;
|
|
struct b43_phy_g *gphy = phy->g;
|
|
struct b43_loctl test_loctl;
|
|
struct b43_loctl orig_loctl;
|
|
struct b43_loctl prev_loctl = {
|
|
.i = -100,
|
|
.q = -100,
|
|
};
|
|
int i;
|
|
int begin, end;
|
|
int found_lower = 0;
|
|
u16 feedth;
|
|
|
|
static const struct b43_loctl modifiers[] = {
|
|
{.i = 1,.q = 1,},
|
|
{.i = 1,.q = 0,},
|
|
{.i = 1,.q = -1,},
|
|
{.i = 0,.q = -1,},
|
|
{.i = -1,.q = -1,},
|
|
{.i = -1,.q = 0,},
|
|
{.i = -1,.q = 1,},
|
|
{.i = 0,.q = 1,},
|
|
};
|
|
|
|
if (d->current_state == 0) {
|
|
begin = 1;
|
|
end = 8;
|
|
} else if (d->current_state % 2 == 0) {
|
|
begin = d->current_state - 1;
|
|
end = d->current_state + 1;
|
|
} else {
|
|
begin = d->current_state - 2;
|
|
end = d->current_state + 2;
|
|
}
|
|
if (begin < 1)
|
|
begin += 8;
|
|
if (end > 8)
|
|
end -= 8;
|
|
|
|
memcpy(&orig_loctl, probe_loctl, sizeof(struct b43_loctl));
|
|
i = begin;
|
|
d->current_state = i;
|
|
while (1) {
|
|
B43_WARN_ON(!(i >= 1 && i <= 8));
|
|
memcpy(&test_loctl, &orig_loctl, sizeof(struct b43_loctl));
|
|
test_loctl.i += modifiers[i - 1].i * d->state_val_multiplier;
|
|
test_loctl.q += modifiers[i - 1].q * d->state_val_multiplier;
|
|
if ((test_loctl.i != prev_loctl.i ||
|
|
test_loctl.q != prev_loctl.q) &&
|
|
(abs(test_loctl.i) <= 16 && abs(test_loctl.q) <= 16)) {
|
|
b43_lo_write(dev, &test_loctl);
|
|
feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
|
|
gphy->pga_gain,
|
|
gphy->trsw_rx_gain);
|
|
if (feedth < d->lowest_feedth) {
|
|
memcpy(probe_loctl, &test_loctl,
|
|
sizeof(struct b43_loctl));
|
|
found_lower = 1;
|
|
d->lowest_feedth = feedth;
|
|
if ((d->nr_measured < 2) &&
|
|
!has_loopback_gain(phy))
|
|
break;
|
|
}
|
|
}
|
|
memcpy(&prev_loctl, &test_loctl, sizeof(prev_loctl));
|
|
if (i == end)
|
|
break;
|
|
if (i == 8)
|
|
i = 1;
|
|
else
|
|
i++;
|
|
d->current_state = i;
|
|
}
|
|
|
|
return found_lower;
|
|
}
|
|
|
|
static void lo_probe_loctls_statemachine(struct b43_wldev *dev,
|
|
struct b43_loctl *loctl,
|
|
int *max_rx_gain)
|
|
{
|
|
struct b43_phy *phy = &dev->phy;
|
|
struct b43_phy_g *gphy = phy->g;
|
|
struct b43_lo_g_statemachine d;
|
|
u16 feedth;
|
|
int found_lower;
|
|
struct b43_loctl probe_loctl;
|
|
int max_repeat = 1, repeat_cnt = 0;
|
|
|
|
d.nr_measured = 0;
|
|
d.state_val_multiplier = 1;
|
|
if (has_loopback_gain(phy))
|
|
d.state_val_multiplier = 3;
|
|
|
|
memcpy(&d.min_loctl, loctl, sizeof(struct b43_loctl));
|
|
if (has_loopback_gain(phy))
|
|
max_repeat = 4;
|
|
do {
|
|
b43_lo_write(dev, &d.min_loctl);
|
|
feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
|
|
gphy->pga_gain,
|
|
gphy->trsw_rx_gain);
|
|
if (feedth < 0x258) {
|
|
if (feedth >= 0x12C)
|
|
*max_rx_gain += 6;
|
|
else
|
|
*max_rx_gain += 3;
|
|
feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
|
|
gphy->pga_gain,
|
|
gphy->trsw_rx_gain);
|
|
}
|
|
d.lowest_feedth = feedth;
|
|
|
|
d.current_state = 0;
|
|
do {
|
|
B43_WARN_ON(!
|
|
(d.current_state >= 0
|
|
&& d.current_state <= 8));
|
|
memcpy(&probe_loctl, &d.min_loctl,
|
|
sizeof(struct b43_loctl));
|
|
found_lower =
|
|
lo_probe_possible_loctls(dev, &probe_loctl, &d);
|
|
if (!found_lower)
|
|
break;
|
|
if ((probe_loctl.i == d.min_loctl.i) &&
|
|
(probe_loctl.q == d.min_loctl.q))
|
|
break;
|
|
memcpy(&d.min_loctl, &probe_loctl,
|
|
sizeof(struct b43_loctl));
|
|
d.nr_measured++;
|
|
} while (d.nr_measured < 24);
|
|
memcpy(loctl, &d.min_loctl, sizeof(struct b43_loctl));
|
|
|
|
if (has_loopback_gain(phy)) {
|
|
if (d.lowest_feedth > 0x1194)
|
|
*max_rx_gain -= 6;
|
|
else if (d.lowest_feedth < 0x5DC)
|
|
*max_rx_gain += 3;
|
|
if (repeat_cnt == 0) {
|
|
if (d.lowest_feedth <= 0x5DC) {
|
|
d.state_val_multiplier = 1;
|
|
repeat_cnt++;
|
|
} else
|
|
d.state_val_multiplier = 2;
|
|
} else if (repeat_cnt == 2)
|
|
d.state_val_multiplier = 1;
|
|
}
|
|
lo_measure_gain_values(dev, *max_rx_gain,
|
|
has_loopback_gain(phy));
|
|
} while (++repeat_cnt < max_repeat);
|
|
}
|
|
|
|
static
|
|
struct b43_lo_calib *b43_calibrate_lo_setting(struct b43_wldev *dev,
|
|
const struct b43_bbatt *bbatt,
|
|
const struct b43_rfatt *rfatt)
|
|
{
|
|
struct b43_phy *phy = &dev->phy;
|
|
struct b43_phy_g *gphy = phy->g;
|
|
struct b43_loctl loctl = {
|
|
.i = 0,
|
|
.q = 0,
|
|
};
|
|
int max_rx_gain;
|
|
struct b43_lo_calib *cal;
|
|
struct lo_g_saved_values uninitialized_var(saved_regs);
|
|
/* Values from the "TXCTL Register and Value Table" */
|
|
u16 txctl_reg;
|
|
u16 txctl_value;
|
|
u16 pad_mix_gain;
|
|
|
|
saved_regs.old_channel = phy->channel;
|
|
b43_mac_suspend(dev);
|
|
lo_measure_setup(dev, &saved_regs);
|
|
|
|
txctl_reg = lo_txctl_register_table(dev, &txctl_value, &pad_mix_gain);
|
|
|
|
b43_radio_maskset(dev, 0x43, 0xFFF0, rfatt->att);
|
|
b43_radio_maskset(dev, txctl_reg, ~txctl_value, (rfatt->with_padmix ? txctl_value :0));
|
|
|
|
max_rx_gain = rfatt->att * 2;
|
|
max_rx_gain += bbatt->att / 2;
|
|
if (rfatt->with_padmix)
|
|
max_rx_gain -= pad_mix_gain;
|
|
if (has_loopback_gain(phy))
|
|
max_rx_gain += gphy->max_lb_gain;
|
|
lo_measure_gain_values(dev, max_rx_gain,
|
|
has_loopback_gain(phy));
|
|
|
|
b43_gphy_set_baseband_attenuation(dev, bbatt->att);
|
|
lo_probe_loctls_statemachine(dev, &loctl, &max_rx_gain);
|
|
|
|
lo_measure_restore(dev, &saved_regs);
|
|
b43_mac_enable(dev);
|
|
|
|
if (b43_debug(dev, B43_DBG_LO)) {
|
|
b43dbg(dev->wl, "LO: Calibrated for BB(%u), RF(%u,%u) "
|
|
"=> I=%d Q=%d\n",
|
|
bbatt->att, rfatt->att, rfatt->with_padmix,
|
|
loctl.i, loctl.q);
|
|
}
|
|
|
|
cal = kmalloc(sizeof(*cal), GFP_KERNEL);
|
|
if (!cal) {
|
|
b43warn(dev->wl, "LO calib: out of memory\n");
|
|
return NULL;
|
|
}
|
|
memcpy(&cal->bbatt, bbatt, sizeof(*bbatt));
|
|
memcpy(&cal->rfatt, rfatt, sizeof(*rfatt));
|
|
memcpy(&cal->ctl, &loctl, sizeof(loctl));
|
|
cal->calib_time = jiffies;
|
|
INIT_LIST_HEAD(&cal->list);
|
|
|
|
return cal;
|
|
}
|
|
|
|
/* Get a calibrated LO setting for the given attenuation values.
|
|
* Might return a NULL pointer under OOM! */
|
|
static
|
|
struct b43_lo_calib *b43_get_calib_lo_settings(struct b43_wldev *dev,
|
|
const struct b43_bbatt *bbatt,
|
|
const struct b43_rfatt *rfatt)
|
|
{
|
|
struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
|
|
struct b43_lo_calib *c;
|
|
|
|
c = b43_find_lo_calib(lo, bbatt, rfatt);
|
|
if (c)
|
|
return c;
|
|
/* Not in the list of calibrated LO settings.
|
|
* Calibrate it now. */
|
|
c = b43_calibrate_lo_setting(dev, bbatt, rfatt);
|
|
if (!c)
|
|
return NULL;
|
|
list_add(&c->list, &lo->calib_list);
|
|
|
|
return c;
|
|
}
|
|
|
|
void b43_gphy_dc_lt_init(struct b43_wldev *dev, bool update_all)
|
|
{
|
|
struct b43_phy *phy = &dev->phy;
|
|
struct b43_phy_g *gphy = phy->g;
|
|
struct b43_txpower_lo_control *lo = gphy->lo_control;
|
|
int i;
|
|
int rf_offset, bb_offset;
|
|
const struct b43_rfatt *rfatt;
|
|
const struct b43_bbatt *bbatt;
|
|
u64 power_vector;
|
|
bool table_changed = false;
|
|
|
|
BUILD_BUG_ON(B43_DC_LT_SIZE != 32);
|
|
B43_WARN_ON(lo->rfatt_list.len * lo->bbatt_list.len > 64);
|
|
|
|
power_vector = lo->power_vector;
|
|
if (!update_all && !power_vector)
|
|
return; /* Nothing to do. */
|
|
|
|
/* Suspend the MAC now to avoid continuous suspend/enable
|
|
* cycles in the loop. */
|
|
b43_mac_suspend(dev);
|
|
|
|
for (i = 0; i < B43_DC_LT_SIZE * 2; i++) {
|
|
struct b43_lo_calib *cal;
|
|
int idx;
|
|
u16 val;
|
|
|
|
if (!update_all && !(power_vector & (((u64)1ULL) << i)))
|
|
continue;
|
|
/* Update the table entry for this power_vector bit.
|
|
* The table rows are RFatt entries and columns are BBatt. */
|
|
bb_offset = i / lo->rfatt_list.len;
|
|
rf_offset = i % lo->rfatt_list.len;
|
|
bbatt = &(lo->bbatt_list.list[bb_offset]);
|
|
rfatt = &(lo->rfatt_list.list[rf_offset]);
|
|
|
|
cal = b43_calibrate_lo_setting(dev, bbatt, rfatt);
|
|
if (!cal) {
|
|
b43warn(dev->wl, "LO: Could not "
|
|
"calibrate DC table entry\n");
|
|
continue;
|
|
}
|
|
/*FIXME: Is Q really in the low nibble? */
|
|
val = (u8)(cal->ctl.q);
|
|
val |= ((u8)(cal->ctl.i)) << 4;
|
|
kfree(cal);
|
|
|
|
/* Get the index into the hardware DC LT. */
|
|
idx = i / 2;
|
|
/* Change the table in memory. */
|
|
if (i % 2) {
|
|
/* Change the high byte. */
|
|
lo->dc_lt[idx] = (lo->dc_lt[idx] & 0x00FF)
|
|
| ((val & 0x00FF) << 8);
|
|
} else {
|
|
/* Change the low byte. */
|
|
lo->dc_lt[idx] = (lo->dc_lt[idx] & 0xFF00)
|
|
| (val & 0x00FF);
|
|
}
|
|
table_changed = true;
|
|
}
|
|
if (table_changed) {
|
|
/* The table changed in memory. Update the hardware table. */
|
|
for (i = 0; i < B43_DC_LT_SIZE; i++)
|
|
b43_phy_write(dev, 0x3A0 + i, lo->dc_lt[i]);
|
|
}
|
|
b43_mac_enable(dev);
|
|
}
|
|
|
|
/* Fixup the RF attenuation value for the case where we are
|
|
* using the PAD mixer. */
|
|
static inline void b43_lo_fixup_rfatt(struct b43_rfatt *rf)
|
|
{
|
|
if (!rf->with_padmix)
|
|
return;
|
|
if ((rf->att != 1) && (rf->att != 2) && (rf->att != 3))
|
|
rf->att = 4;
|
|
}
|
|
|
|
void b43_lo_g_adjust(struct b43_wldev *dev)
|
|
{
|
|
struct b43_phy_g *gphy = dev->phy.g;
|
|
struct b43_lo_calib *cal;
|
|
struct b43_rfatt rf;
|
|
|
|
memcpy(&rf, &gphy->rfatt, sizeof(rf));
|
|
b43_lo_fixup_rfatt(&rf);
|
|
|
|
cal = b43_get_calib_lo_settings(dev, &gphy->bbatt, &rf);
|
|
if (!cal)
|
|
return;
|
|
b43_lo_write(dev, &cal->ctl);
|
|
}
|
|
|
|
void b43_lo_g_adjust_to(struct b43_wldev *dev,
|
|
u16 rfatt, u16 bbatt, u16 tx_control)
|
|
{
|
|
struct b43_rfatt rf;
|
|
struct b43_bbatt bb;
|
|
struct b43_lo_calib *cal;
|
|
|
|
memset(&rf, 0, sizeof(rf));
|
|
memset(&bb, 0, sizeof(bb));
|
|
rf.att = rfatt;
|
|
bb.att = bbatt;
|
|
b43_lo_fixup_rfatt(&rf);
|
|
cal = b43_get_calib_lo_settings(dev, &bb, &rf);
|
|
if (!cal)
|
|
return;
|
|
b43_lo_write(dev, &cal->ctl);
|
|
}
|
|
|
|
/* Periodic LO maintanance work */
|
|
void b43_lo_g_maintanance_work(struct b43_wldev *dev)
|
|
{
|
|
struct b43_phy *phy = &dev->phy;
|
|
struct b43_phy_g *gphy = phy->g;
|
|
struct b43_txpower_lo_control *lo = gphy->lo_control;
|
|
unsigned long now;
|
|
unsigned long expire;
|
|
struct b43_lo_calib *cal, *tmp;
|
|
bool current_item_expired = false;
|
|
bool hwpctl;
|
|
|
|
if (!lo)
|
|
return;
|
|
now = jiffies;
|
|
hwpctl = b43_has_hardware_pctl(dev);
|
|
|
|
if (hwpctl) {
|
|
/* Read the power vector and update it, if needed. */
|
|
expire = now - B43_LO_PWRVEC_EXPIRE;
|
|
if (time_before(lo->pwr_vec_read_time, expire)) {
|
|
lo_read_power_vector(dev);
|
|
b43_gphy_dc_lt_init(dev, 0);
|
|
}
|
|
//FIXME Recalc the whole DC table from time to time?
|
|
}
|
|
|
|
if (hwpctl)
|
|
return;
|
|
/* Search for expired LO settings. Remove them.
|
|
* Recalibrate the current setting, if expired. */
|
|
expire = now - B43_LO_CALIB_EXPIRE;
|
|
list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
|
|
if (!time_before(cal->calib_time, expire))
|
|
continue;
|
|
/* This item expired. */
|
|
if (b43_compare_bbatt(&cal->bbatt, &gphy->bbatt) &&
|
|
b43_compare_rfatt(&cal->rfatt, &gphy->rfatt)) {
|
|
B43_WARN_ON(current_item_expired);
|
|
current_item_expired = true;
|
|
}
|
|
if (b43_debug(dev, B43_DBG_LO)) {
|
|
b43dbg(dev->wl, "LO: Item BB(%u), RF(%u,%u), "
|
|
"I=%d, Q=%d expired\n",
|
|
cal->bbatt.att, cal->rfatt.att,
|
|
cal->rfatt.with_padmix,
|
|
cal->ctl.i, cal->ctl.q);
|
|
}
|
|
list_del(&cal->list);
|
|
kfree(cal);
|
|
}
|
|
if (current_item_expired || unlikely(list_empty(&lo->calib_list))) {
|
|
/* Recalibrate currently used LO setting. */
|
|
if (b43_debug(dev, B43_DBG_LO))
|
|
b43dbg(dev->wl, "LO: Recalibrating current LO setting\n");
|
|
cal = b43_calibrate_lo_setting(dev, &gphy->bbatt, &gphy->rfatt);
|
|
if (cal) {
|
|
list_add(&cal->list, &lo->calib_list);
|
|
b43_lo_write(dev, &cal->ctl);
|
|
} else
|
|
b43warn(dev->wl, "Failed to recalibrate current LO setting\n");
|
|
}
|
|
}
|
|
|
|
void b43_lo_g_cleanup(struct b43_wldev *dev)
|
|
{
|
|
struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
|
|
struct b43_lo_calib *cal, *tmp;
|
|
|
|
if (!lo)
|
|
return;
|
|
list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
|
|
list_del(&cal->list);
|
|
kfree(cal);
|
|
}
|
|
}
|
|
|
|
/* LO Initialization */
|
|
void b43_lo_g_init(struct b43_wldev *dev)
|
|
{
|
|
if (b43_has_hardware_pctl(dev)) {
|
|
lo_read_power_vector(dev);
|
|
b43_gphy_dc_lt_init(dev, 1);
|
|
}
|
|
}
|