diff options
Diffstat (limited to 'package/b43/src/lo.c')
| -rw-r--r-- | package/b43/src/lo.c | 1036 |
1 files changed, 0 insertions, 1036 deletions
diff --git a/package/b43/src/lo.c b/package/b43/src/lo.c index 9c854d6aae..e69de29bb2 100644 --- a/package/b43/src/lo.c +++ b/package/b43/src/lo.c @@ -1,1036 +0,0 @@ -/* - - 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); - } -} |