--- /dev/null
+/*
+
+ Broadcom B43 wireless driver
+
+ G PHY LO (LocalOscillator) Measuring and Control routines
+
+ Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
+ Copyright (c) 2005, 2006 Stefano Brivio <stefano.brivio@polimi.it>
+ Copyright (c) 2005-2007 Michael Buesch <m@bues.ch>
+ Copyright (c) 2005, 2006 Danny van Dyk <kugelfang@gentoo.org>
+ Copyright (c) 2005, 2006 Andreas Jaggi <andreas.jaggi@waterwave.ch>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; see the file COPYING. If not, write to
+ the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+
+*/
+
+#include "b43.h"
+#include "lo.h"
+#include "phy_g.h"
+#include "main.h"
+
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+
+static struct b43_lo_calib *b43_find_lo_calib(struct b43_txpower_lo_control *lo,
+ const struct b43_bbatt *bbatt,
+ const struct b43_rfatt *rfatt)
+{
+ struct b43_lo_calib *c;
+
+ list_for_each_entry(c, &lo->calib_list, list) {
+ if (!b43_compare_bbatt(&c->bbatt, bbatt))
+ continue;
+ if (!b43_compare_rfatt(&c->rfatt, rfatt))
+ continue;
+ return c;
+ }
+
+ return NULL;
+}
+
+/* Write the LocalOscillator Control (adjust) value-pair. */
+static void b43_lo_write(struct b43_wldev *dev, struct b43_loctl *control)
+{
+ struct b43_phy *phy = &dev->phy;
+ u16 value;
+
+ if (B43_DEBUG) {
+ if (unlikely(abs(control->i) > 16 || abs(control->q) > 16)) {
+ b43dbg(dev->wl, "Invalid LO control pair "
+ "(I: %d, Q: %d)\n", control->i, control->q);
+ dump_stack();
+ return;
+ }
+ }
+ B43_WARN_ON(phy->type != B43_PHYTYPE_G);
+
+ value = (u8) (control->q);
+ value |= ((u8) (control->i)) << 8;
+ b43_phy_write(dev, B43_PHY_LO_CTL, value);
+}
+
+static u16 lo_measure_feedthrough(struct b43_wldev *dev,
+ u16 lna, u16 pga, u16 trsw_rx)
+{
+ struct b43_phy *phy = &dev->phy;
+ u16 rfover;
+ u16 feedthrough;
+
+ if (phy->gmode) {
+ lna <<= B43_PHY_RFOVERVAL_LNA_SHIFT;
+ pga <<= B43_PHY_RFOVERVAL_PGA_SHIFT;
+
+ B43_WARN_ON(lna & ~B43_PHY_RFOVERVAL_LNA);
+ B43_WARN_ON(pga & ~B43_PHY_RFOVERVAL_PGA);
+/*FIXME This assertion fails B43_WARN_ON(trsw_rx & ~(B43_PHY_RFOVERVAL_TRSWRX |
+ B43_PHY_RFOVERVAL_BW));
+*/
+ trsw_rx &= (B43_PHY_RFOVERVAL_TRSWRX | B43_PHY_RFOVERVAL_BW);
+
+ /* Construct the RF Override Value */
+ rfover = B43_PHY_RFOVERVAL_UNK;
+ rfover |= pga;
+ rfover |= lna;
+ rfover |= trsw_rx;
+ if ((dev->dev->bus_sprom->boardflags_lo & B43_BFL_EXTLNA)
+ && phy->rev > 6)
+ rfover |= B43_PHY_RFOVERVAL_EXTLNA;
+
+ b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
+ b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
+ udelay(10);
+ rfover |= B43_PHY_RFOVERVAL_BW_LBW;
+ b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
+ udelay(10);
+ rfover |= B43_PHY_RFOVERVAL_BW_LPF;
+ b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
+ udelay(10);
+ b43_phy_write(dev, B43_PHY_PGACTL, 0xF300);
+ } else {
+ pga |= B43_PHY_PGACTL_UNKNOWN;
+ b43_phy_write(dev, B43_PHY_PGACTL, pga);
+ udelay(10);
+ pga |= B43_PHY_PGACTL_LOWBANDW;
+ b43_phy_write(dev, B43_PHY_PGACTL, pga);
+ udelay(10);
+ pga |= B43_PHY_PGACTL_LPF;
+ b43_phy_write(dev, B43_PHY_PGACTL, pga);
+ }
+ udelay(21);
+ feedthrough = b43_phy_read(dev, B43_PHY_LO_LEAKAGE);
+
+ /* This is a good place to check if we need to relax a bit,
+ * as this is the main function called regularly
+ * in the LO calibration. */
+ cond_resched();
+
+ return feedthrough;
+}
+
+/* TXCTL Register and Value Table.
+ * Returns the "TXCTL Register".
+ * "value" is the "TXCTL Value".
+ * "pad_mix_gain" is the PAD Mixer Gain.
+ */
+static u16 lo_txctl_register_table(struct b43_wldev *dev,
+ u16 *value, u16 *pad_mix_gain)
+{
+ struct b43_phy *phy = &dev->phy;
+ u16 reg, v, padmix;
+
+ if (phy->type == B43_PHYTYPE_B) {
+ v = 0x30;
+ if (phy->radio_rev <= 5) {
+ reg = 0x43;
+ padmix = 0;
+ } else {
+ reg = 0x52;
+ padmix = 5;
+ }
+ } else {
+ if (phy->rev >= 2 && phy->radio_rev == 8) {
+ reg = 0x43;
+ v = 0x10;
+ padmix = 2;
+ } else {
+ reg = 0x52;
+ v = 0x30;
+ padmix = 5;
+ }
+ }
+ if (value)
+ *value = v;
+ if (pad_mix_gain)
+ *pad_mix_gain = padmix;
+
+ return reg;
+}
+
+static void lo_measure_txctl_values(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;
+ u16 reg, mask;
+ u16 trsw_rx, pga;
+ u16 radio_pctl_reg;
+
+ static const u8 tx_bias_values[] = {
+ 0x09, 0x08, 0x0A, 0x01, 0x00,
+ 0x02, 0x05, 0x04, 0x06,
+ };
+ static const u8 tx_magn_values[] = {
+ 0x70, 0x40,
+ };
+
+ if (!has_loopback_gain(phy)) {
+ radio_pctl_reg = 6;
+ trsw_rx = 2;
+ pga = 0;
+ } else {
+ int lb_gain; /* Loopback gain (in dB) */
+
+ trsw_rx = 0;
+ lb_gain = gphy->max_lb_gain / 2;
+ if (lb_gain > 10) {
+ radio_pctl_reg = 0;
+ pga = abs(10 - lb_gain) / 6;
+ pga = clamp_val(pga, 0, 15);
+ } else {
+ int cmp_val;
+ int tmp;
+
+ pga = 0;
+ cmp_val = 0x24;
+ if ((phy->rev >= 2) &&
+ (phy->radio_ver == 0x2050) && (phy->radio_rev == 8))
+ cmp_val = 0x3C;
+ tmp = lb_gain;
+ if ((10 - lb_gain) < cmp_val)
+ tmp = (10 - lb_gain);
+ if (tmp < 0)
+ tmp += 6;
+ else
+ tmp += 3;
+ cmp_val /= 4;
+ tmp /= 4;
+ if (tmp >= cmp_val)
+ radio_pctl_reg = cmp_val;
+ else
+ radio_pctl_reg = tmp;
+ }
+ }
+ b43_radio_maskset(dev, 0x43, 0xFFF0, radio_pctl_reg);
+ b43_gphy_set_baseband_attenuation(dev, 2);
+
+ reg = lo_txctl_register_table(dev, &mask, NULL);
+ mask = ~mask;
+ b43_radio_mask(dev, reg, mask);
+
+ if (has_tx_magnification(phy)) {
+ int i, j;
+ int feedthrough;
+ int min_feedth = 0xFFFF;
+ u8 tx_magn, tx_bias;
+
+ for (i = 0; i < ARRAY_SIZE(tx_magn_values); i++) {
+ tx_magn = tx_magn_values[i];
+ b43_radio_maskset(dev, 0x52, 0xFF0F, tx_magn);
+ for (j = 0; j < ARRAY_SIZE(tx_bias_values); j++) {
+ tx_bias = tx_bias_values[j];
+ b43_radio_maskset(dev, 0x52, 0xFFF0, tx_bias);
+ feedthrough =
+ lo_measure_feedthrough(dev, 0, pga,
+ trsw_rx);
+ if (feedthrough < min_feedth) {
+ lo->tx_bias = tx_bias;
+ lo->tx_magn = tx_magn;
+ min_feedth = feedthrough;
+ }
+ if (lo->tx_bias == 0)
+ break;
+ }
+ b43_radio_write16(dev, 0x52,
+ (b43_radio_read16(dev, 0x52)
+ & 0xFF00) | lo->tx_bias | lo->
+ tx_magn);
+ }
+ } else {
+ lo->tx_magn = 0;
+ lo->tx_bias = 0;
+ b43_radio_mask(dev, 0x52, 0xFFF0); /* TX bias == 0 */
+ }
+ lo->txctl_measured_time = jiffies;
+}
+
+static void lo_read_power_vector(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;
+ int i;
+ u64 tmp;
+ u64 power_vector = 0;
+
+ for (i = 0; i < 8; i += 2) {
+ tmp = b43_shm_read16(dev, B43_SHM_SHARED, 0x310 + i);
+ power_vector |= (tmp << (i * 8));
+ /* Clear the vector on the device. */
+ b43_shm_write16(dev, B43_SHM_SHARED, 0x310 + i, 0);
+ }
+ if (power_vector)
+ lo->power_vector = power_vector;
+ lo->pwr_vec_read_time = jiffies;
+}
+
+/* 802.11/LO/GPHY/MeasuringGains */
+static void lo_measure_gain_values(struct b43_wldev *dev,
+ s16 max_rx_gain, int use_trsw_rx)
+{
+ struct b43_phy *phy = &dev->phy;
+ struct b43_phy_g *gphy = phy->g;
+ u16 tmp;
+
+ if (max_rx_gain < 0)
+ max_rx_gain = 0;
+
+ if (has_loopback_gain(phy)) {
+ int trsw_rx_gain;
+
+ if (use_trsw_rx) {
+ trsw_rx_gain = gphy->trsw_rx_gain / 2;
+ if (max_rx_gain >= trsw_rx_gain) {
+ trsw_rx_gain = max_rx_gain - trsw_rx_gain;
+ }
+ } else
+ trsw_rx_gain = max_rx_gain;
+ if (trsw_rx_gain < 9) {
+ gphy->lna_lod_gain = 0;
+ } else {
+ gphy->lna_lod_gain = 1;
+ trsw_rx_gain -= 8;
+ }
+ trsw_rx_gain = clamp_val(trsw_rx_gain, 0, 0x2D);
+ gphy->pga_gain = trsw_rx_gain / 3;
+ if (gphy->pga_gain >= 5) {
+ gphy->pga_gain -= 5;
+ gphy->lna_gain = 2;
+ } else
+ gphy->lna_gain = 0;
+ } else {
+ gphy->lna_gain = 0;
+ gphy->trsw_rx_gain = 0x20;
+ if (max_rx_gain >= 0x14) {
+ gphy->lna_lod_gain = 1;
+ gphy->pga_gain = 2;
+ } else if (max_rx_gain >= 0x12) {
+ gphy->lna_lod_gain = 1;
+ gphy->pga_gain = 1;
+ } else if (max_rx_gain >= 0xF) {
+ gphy->lna_lod_gain = 1;
+ gphy->pga_gain = 0;
+ } else {
+ gphy->lna_lod_gain = 0;
+ gphy->pga_gain = 0;
+ }
+ }
+
+ tmp = b43_radio_read16(dev, 0x7A);
+ if (gphy->lna_lod_gain == 0)
+ tmp &= ~0x0008;
+ else
+ tmp |= 0x0008;
+ b43_radio_write16(dev, 0x7A, tmp);
+}
+
+struct lo_g_saved_values {
+ u8 old_channel;
+
+ /* Core registers */
+ u16 reg_3F4;
+ u16 reg_3E2;
+
+ /* PHY registers */
+ u16 phy_lo_mask;
+ u16 phy_extg_01;
+ u16 phy_dacctl_hwpctl;
+ u16 phy_dacctl;
+ u16 phy_cck_14;
+ u16 phy_hpwr_tssictl;
+ u16 phy_analogover;
+ u16 phy_analogoverval;
+ u16 phy_rfover;
+ u16 phy_rfoverval;
+ u16 phy_classctl;
+ u16 phy_cck_3E;
+ u16 phy_crs0;
+ u16 phy_pgactl;
+ u16 phy_cck_2A;
+ u16 phy_syncctl;
+ u16 phy_cck_30;
+ u16 phy_cck_06;
+
+ /* Radio registers */
+ u16 radio_43;
+ u16 radio_7A;
+ u16 radio_52;
+};
+
+static void lo_measure_setup(struct b43_wldev *dev,
+ struct lo_g_saved_values *sav)
+{
+ struct ssb_sprom *sprom = dev->dev->bus_sprom;
+ struct b43_phy *phy = &dev->phy;
+ struct b43_phy_g *gphy = phy->g;
+ struct b43_txpower_lo_control *lo = gphy->lo_control;
+ u16 tmp;
+
+ if (b43_has_hardware_pctl(dev)) {
+ sav->phy_lo_mask = b43_phy_read(dev, B43_PHY_LO_MASK);
+ sav->phy_extg_01 = b43_phy_read(dev, B43_PHY_EXTG(0x01));
+ sav->phy_dacctl_hwpctl = b43_phy_read(dev, B43_PHY_DACCTL);
+ sav->phy_cck_14 = b43_phy_read(dev, B43_PHY_CCK(0x14));
+ sav->phy_hpwr_tssictl = b43_phy_read(dev, B43_PHY_HPWR_TSSICTL);
+
+ b43_phy_set(dev, B43_PHY_HPWR_TSSICTL, 0x100);
+ b43_phy_set(dev, B43_PHY_EXTG(0x01), 0x40);
+ b43_phy_set(dev, B43_PHY_DACCTL, 0x40);
+ b43_phy_set(dev, B43_PHY_CCK(0x14), 0x200);
+ }
+ if (phy->type == B43_PHYTYPE_B &&
+ phy->radio_ver == 0x2050 && phy->radio_rev < 6) {
+ b43_phy_write(dev, B43_PHY_CCK(0x16), 0x410);
+ b43_phy_write(dev, B43_PHY_CCK(0x17), 0x820);
+ }
+ if (phy->rev >= 2) {
+ sav->phy_analogover = b43_phy_read(dev, B43_PHY_ANALOGOVER);
+ sav->phy_analogoverval =
+ b43_phy_read(dev, B43_PHY_ANALOGOVERVAL);
+ sav->phy_rfover = b43_phy_read(dev, B43_PHY_RFOVER);
+ sav->phy_rfoverval = b43_phy_read(dev, B43_PHY_RFOVERVAL);
+ sav->phy_classctl = b43_phy_read(dev, B43_PHY_CLASSCTL);
+ sav->phy_cck_3E = b43_phy_read(dev, B43_PHY_CCK(0x3E));
+ sav->phy_crs0 = b43_phy_read(dev, B43_PHY_CRS0);
+
+ b43_phy_mask(dev, B43_PHY_CLASSCTL, 0xFFFC);
+ b43_phy_mask(dev, B43_PHY_CRS0, 0x7FFF);
+ b43_phy_set(dev, B43_PHY_ANALOGOVER, 0x0003);
+ b43_phy_mask(dev, B43_PHY_ANALOGOVERVAL, 0xFFFC);
+ if (phy->type == B43_PHYTYPE_G) {
+ if ((phy->rev >= 7) &&
+ (sprom->boardflags_lo & B43_BFL_EXTLNA)) {
+ b43_phy_write(dev, B43_PHY_RFOVER, 0x933);
+ } else {
+ b43_phy_write(dev, B43_PHY_RFOVER, 0x133);
+ }
+ } else {
+ b43_phy_write(dev, B43_PHY_RFOVER, 0);
+ }
+ b43_phy_write(dev, B43_PHY_CCK(0x3E), 0);
+ }
+ sav->reg_3F4 = b43_read16(dev, 0x3F4);
+ sav->reg_3E2 = b43_read16(dev, 0x3E2);
+ sav->radio_43 = b43_radio_read16(dev, 0x43);
+ sav->radio_7A = b43_radio_read16(dev, 0x7A);
+ sav->phy_pgactl = b43_phy_read(dev, B43_PHY_PGACTL);
+ sav->phy_cck_2A = b43_phy_read(dev, B43_PHY_CCK(0x2A));
+ sav->phy_syncctl = b43_phy_read(dev, B43_PHY_SYNCCTL);
+ sav->phy_dacctl = b43_phy_read(dev, B43_PHY_DACCTL);
+
+ 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);
+ }
+}
Code Review / kvmfornfv.git / blobdiff