diff options
Diffstat (limited to 'drivers/net/wireless/b43/lo.c')
| -rw-r--r-- | drivers/net/wireless/b43/lo.c | 1016 |
1 files changed, 1016 insertions, 0 deletions
diff --git a/drivers/net/wireless/b43/lo.c b/drivers/net/wireless/b43/lo.c new file mode 100644 index 000000000..916123a3d --- /dev/null +++ b/drivers/net/wireless/b43/lo.c @@ -0,0 +1,1016 @@ +/* + + 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); + } +} |