-/*
-
- 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 <mb@bu3sch.de>
- 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.h"
-#include "main.h"
-
-#include <linux/delay.h>
-#include <linux/sched.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_txpower_lo_control *lo = phy->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 = phy->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_write16(dev, 0x43, (b43_radio_read16(dev, 0x43)
- & 0xFFF0) | radio_pctl_reg);
- b43_phy_set_baseband_attenuation(dev, 2);
-
- reg = lo_txctl_register_table(dev, &mask, NULL);
- mask = ~mask;
- b43_radio_write16(dev, reg, b43_radio_read16(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_write16(dev, 0x52,
- (b43_radio_read16(dev, 0x52)
- & 0xFF0F) | tx_magn);
- for (j = 0; j < ARRAY_SIZE(tx_bias_values); j++) {
- tx_bias = tx_bias_values[j];
- b43_radio_write16(dev, 0x52,
- (b43_radio_read16(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_write16(dev, 0x52, b43_radio_read16(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_txpower_lo_control *lo = phy->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;
- u16 tmp;
-
- if (max_rx_gain < 0)
- max_rx_gain = 0;
-
- if (has_loopback_gain(phy)) {
- int trsw_rx = 0;
- int trsw_rx_gain;
-
- if (use_trsw_rx) {
- trsw_rx_gain = phy->trsw_rx_gain / 2;
- if (max_rx_gain >= trsw_rx_gain) {
- trsw_rx_gain = max_rx_gain - trsw_rx_gain;
- trsw_rx = 0x20;
- }
- } else
- trsw_rx_gain = max_rx_gain;
- if (trsw_rx_gain < 9) {
- phy->lna_lod_gain = 0;
- } else {
- phy->lna_lod_gain = 1;
- trsw_rx_gain -= 8;
- }
- trsw_rx_gain = clamp_val(trsw_rx_gain, 0, 0x2D);
- phy->pga_gain = trsw_rx_gain / 3;
- if (phy->pga_gain >= 5) {
- phy->pga_gain -= 5;
- phy->lna_gain = 2;
- } else
- phy->lna_gain = 0;
- } else {
- phy->lna_gain = 0;
- phy->trsw_rx_gain = 0x20;
- if (max_rx_gain >= 0x14) {
- phy->lna_lod_gain = 1;
- phy->pga_gain = 2;
- } else if (max_rx_gain >= 0x12) {
- phy->lna_lod_gain = 1;
- phy->pga_gain = 1;
- } else if (max_rx_gain >= 0xF) {
- phy->lna_lod_gain = 1;
- phy->pga_gain = 0;
- } else {
- phy->lna_lod_gain = 0;
- phy->pga_gain = 0;
- }
- }
-
- tmp = b43_radio_read16(dev, 0x7A);
- if (phy->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_txpower_lo_control *lo = phy->lo_control;
- u16 tmp;
-
- if (b43_has_hardware_pctl(phy)) {
- 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_write(dev, B43_PHY_HPWR_TSSICTL,
- b43_phy_read(dev, B43_PHY_HPWR_TSSICTL)
- | 0x100);
- b43_phy_write(dev, B43_PHY_EXTG(0x01),
- b43_phy_read(dev, B43_PHY_EXTG(0x01))
- | 0x40);
- b43_phy_write(dev, B43_PHY_DACCTL,
- b43_phy_read(dev, B43_PHY_DACCTL)
- | 0x40);
- b43_phy_write(dev, B43_PHY_CCK(0x14),
- b43_phy_read(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_write(dev, B43_PHY_CLASSCTL,
- b43_phy_read(dev, B43_PHY_CLASSCTL)
- & 0xFFFC);
- b43_phy_write(dev, B43_PHY_CRS0, b43_phy_read(dev, B43_PHY_CRS0)
- & 0x7FFF);
- b43_phy_write(dev, B43_PHY_ANALOGOVER,
- b43_phy_read(dev, B43_PHY_ANALOGOVER)
- | 0x0003);
- b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
- b43_phy_read(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);
- b43_radio_selectchannel(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;
- u16 tmp;
-
- if (phy->rev >= 2) {
- b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
- tmp = (phy->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 = (phy->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_write16(dev, 0x52, (b43_radio_read16(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(phy)) {
- 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_radio_selectchannel(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_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, phy->lna_gain,
- phy->pga_gain,
- phy->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_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, phy->lna_gain,
- phy->pga_gain,
- phy->trsw_rx_gain);
- if (feedth < 0x258) {
- if (feedth >= 0x12C)
- *max_rx_gain += 6;
- else
- *max_rx_gain += 3;
- feedth = lo_measure_feedthrough(dev, phy->lna_gain,
- phy->pga_gain,
- phy->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_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_write16(dev, 0x43,
- (b43_radio_read16(dev, 0x43) & 0xFFF0)
- | rfatt->att);
- b43_radio_write16(dev, txctl_reg,
- (b43_radio_read16(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 += phy->max_lb_gain;
- lo_measure_gain_values(dev, max_rx_gain,
- has_loopback_gain(phy));
-
- b43_phy_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.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_txpower_lo_control *lo = phy->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 = 0;
-
- 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 = 1;
- }
- 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 *phy = &dev->phy;
- struct b43_lo_calib *cal;
- struct b43_rfatt rf;
-
- memcpy(&rf, &phy->rfatt, sizeof(rf));
- b43_lo_fixup_rfatt(&rf);
-
- cal = b43_get_calib_lo_settings(dev, &phy->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_txpower_lo_control *lo = phy->lo_control;
- unsigned long now;
- unsigned long expire;
- struct b43_lo_calib *cal, *tmp;
- bool current_item_expired = 0;
- bool hwpctl;
-
- if (!lo)
- return;
- now = jiffies;
- hwpctl = b43_has_hardware_pctl(phy);
-
- 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, &phy->bbatt) &&
- b43_compare_rfatt(&cal->rfatt, &phy->rfatt)) {
- B43_WARN_ON(current_item_expired);
- current_item_expired = 1;
- }
- 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, &phy->bbatt, &phy->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.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)
-{
- struct b43_phy *phy = &dev->phy;
-
- if (b43_has_hardware_pctl(phy)) {
- lo_read_power_vector(dev);
- b43_gphy_dc_lt_init(dev, 1);
- }
-}
projects / openwrt.git / blobdiff