| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| |
| 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> |
| |
| |
| */ |
| |
| #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 maintenance work */ |
| void b43_lo_g_maintenance_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); |
| } |
| } |
