1/* 2 3 Broadcom B43 wireless driver 4 5 G PHY LO (LocalOscillator) Measuring and Control routines 6 7 Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>, 8 Copyright (c) 2005, 2006 Stefano Brivio <stefano.brivio@polimi.it> 9 Copyright (c) 2005-2007 Michael Buesch <m@bues.ch> 10 Copyright (c) 2005, 2006 Danny van Dyk <kugelfang@gentoo.org> 11 Copyright (c) 2005, 2006 Andreas Jaggi <andreas.jaggi@waterwave.ch> 12 13 This program is free software; you can redistribute it and/or modify 14 it under the terms of the GNU General Public License as published by 15 the Free Software Foundation; either version 2 of the License, or 16 (at your option) any later version. 17 18 This program is distributed in the hope that it will be useful, 19 but WITHOUT ANY WARRANTY; without even the implied warranty of 20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 GNU General Public License for more details. 22 23 You should have received a copy of the GNU General Public License 24 along with this program; see the file COPYING. If not, write to 25 the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor, 26 Boston, MA 02110-1301, USA. 27 28*/ 29 30#include "b43.h" 31#include "lo.h" 32#include "phy_g.h" 33#include "main.h" 34 35#include <linux/delay.h> 36#include <linux/sched.h> 37#include <linux/slab.h> 38 39 40static struct b43_lo_calib *b43_find_lo_calib(struct b43_txpower_lo_control *lo, 41 const struct b43_bbatt *bbatt, 42 const struct b43_rfatt *rfatt) 43{ 44 struct b43_lo_calib *c; 45 46 list_for_each_entry(c, &lo->calib_list, list) { 47 if (!b43_compare_bbatt(&c->bbatt, bbatt)) 48 continue; 49 if (!b43_compare_rfatt(&c->rfatt, rfatt)) 50 continue; 51 return c; 52 } 53 54 return NULL; 55} 56 57/* Write the LocalOscillator Control (adjust) value-pair. */ 58static void b43_lo_write(struct b43_wldev *dev, struct b43_loctl *control) 59{ 60 struct b43_phy *phy = &dev->phy; 61 u16 value; 62 63 if (B43_DEBUG) { 64 if (unlikely(abs(control->i) > 16 || abs(control->q) > 16)) { 65 b43dbg(dev->wl, "Invalid LO control pair " 66 "(I: %d, Q: %d)\n", control->i, control->q); 67 dump_stack(); 68 return; 69 } 70 } 71 B43_WARN_ON(phy->type != B43_PHYTYPE_G); 72 73 value = (u8) (control->q); 74 value |= ((u8) (control->i)) << 8; 75 b43_phy_write(dev, B43_PHY_LO_CTL, value); 76} 77 78static u16 lo_measure_feedthrough(struct b43_wldev *dev, 79 u16 lna, u16 pga, u16 trsw_rx) 80{ 81 struct b43_phy *phy = &dev->phy; 82 u16 rfover; 83 u16 feedthrough; 84 85 if (phy->gmode) { 86 lna <<= B43_PHY_RFOVERVAL_LNA_SHIFT; 87 pga <<= B43_PHY_RFOVERVAL_PGA_SHIFT; 88 89 B43_WARN_ON(lna & ~B43_PHY_RFOVERVAL_LNA); 90 B43_WARN_ON(pga & ~B43_PHY_RFOVERVAL_PGA); 91/*FIXME This assertion fails B43_WARN_ON(trsw_rx & ~(B43_PHY_RFOVERVAL_TRSWRX | 92 B43_PHY_RFOVERVAL_BW)); 93*/ 94 trsw_rx &= (B43_PHY_RFOVERVAL_TRSWRX | B43_PHY_RFOVERVAL_BW); 95 96 /* Construct the RF Override Value */ 97 rfover = B43_PHY_RFOVERVAL_UNK; 98 rfover |= pga; 99 rfover |= lna; 100 rfover |= trsw_rx; 101 if ((dev->dev->bus_sprom->boardflags_lo & B43_BFL_EXTLNA) 102 && phy->rev > 6) 103 rfover |= B43_PHY_RFOVERVAL_EXTLNA; 104 105 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300); 106 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover); 107 udelay(10); 108 rfover |= B43_PHY_RFOVERVAL_BW_LBW; 109 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover); 110 udelay(10); 111 rfover |= B43_PHY_RFOVERVAL_BW_LPF; 112 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover); 113 udelay(10); 114 b43_phy_write(dev, B43_PHY_PGACTL, 0xF300); 115 } else { 116 pga |= B43_PHY_PGACTL_UNKNOWN; 117 b43_phy_write(dev, B43_PHY_PGACTL, pga); 118 udelay(10); 119 pga |= B43_PHY_PGACTL_LOWBANDW; 120 b43_phy_write(dev, B43_PHY_PGACTL, pga); 121 udelay(10); 122 pga |= B43_PHY_PGACTL_LPF; 123 b43_phy_write(dev, B43_PHY_PGACTL, pga); 124 } 125 udelay(21); 126 feedthrough = b43_phy_read(dev, B43_PHY_LO_LEAKAGE); 127 128 /* This is a good place to check if we need to relax a bit, 129 * as this is the main function called regularly 130 * in the LO calibration. */ 131 cond_resched(); 132 133 return feedthrough; 134} 135 136/* TXCTL Register and Value Table. 137 * Returns the "TXCTL Register". 138 * "value" is the "TXCTL Value". 139 * "pad_mix_gain" is the PAD Mixer Gain. 140 */ 141static u16 lo_txctl_register_table(struct b43_wldev *dev, 142 u16 *value, u16 *pad_mix_gain) 143{ 144 struct b43_phy *phy = &dev->phy; 145 u16 reg, v, padmix; 146 147 if (phy->type == B43_PHYTYPE_B) { 148 v = 0x30; 149 if (phy->radio_rev <= 5) { 150 reg = 0x43; 151 padmix = 0; 152 } else { 153 reg = 0x52; 154 padmix = 5; 155 } 156 } else { 157 if (phy->rev >= 2 && phy->radio_rev == 8) { 158 reg = 0x43; 159 v = 0x10; 160 padmix = 2; 161 } else { 162 reg = 0x52; 163 v = 0x30; 164 padmix = 5; 165 } 166 } 167 if (value) 168 *value = v; 169 if (pad_mix_gain) 170 *pad_mix_gain = padmix; 171 172 return reg; 173} 174 175static void lo_measure_txctl_values(struct b43_wldev *dev) 176{ 177 struct b43_phy *phy = &dev->phy; 178 struct b43_phy_g *gphy = phy->g; 179 struct b43_txpower_lo_control *lo = gphy->lo_control; 180 u16 reg, mask; 181 u16 trsw_rx, pga; 182 u16 radio_pctl_reg; 183 184 static const u8 tx_bias_values[] = { 185 0x09, 0x08, 0x0A, 0x01, 0x00, 186 0x02, 0x05, 0x04, 0x06, 187 }; 188 static const u8 tx_magn_values[] = { 189 0x70, 0x40, 190 }; 191 192 if (!has_loopback_gain(phy)) { 193 radio_pctl_reg = 6; 194 trsw_rx = 2; 195 pga = 0; 196 } else { 197 int lb_gain; /* Loopback gain (in dB) */ 198 199 trsw_rx = 0; 200 lb_gain = gphy->max_lb_gain / 2; 201 if (lb_gain > 10) { 202 radio_pctl_reg = 0; 203 pga = abs(10 - lb_gain) / 6; 204 pga = clamp_val(pga, 0, 15); 205 } else { 206 int cmp_val; 207 int tmp; 208 209 pga = 0; 210 cmp_val = 0x24; 211 if ((phy->rev >= 2) && 212 (phy->radio_ver == 0x2050) && (phy->radio_rev == 8)) 213 cmp_val = 0x3C; 214 tmp = lb_gain; 215 if ((10 - lb_gain) < cmp_val) 216 tmp = (10 - lb_gain); 217 if (tmp < 0) 218 tmp += 6; 219 else 220 tmp += 3; 221 cmp_val /= 4; 222 tmp /= 4; 223 if (tmp >= cmp_val) 224 radio_pctl_reg = cmp_val; 225 else 226 radio_pctl_reg = tmp; 227 } 228 } 229 b43_radio_maskset(dev, 0x43, 0xFFF0, radio_pctl_reg); 230 b43_gphy_set_baseband_attenuation(dev, 2); 231 232 reg = lo_txctl_register_table(dev, &mask, NULL); 233 mask = ~mask; 234 b43_radio_mask(dev, reg, mask); 235 236 if (has_tx_magnification(phy)) { 237 int i, j; 238 int feedthrough; 239 int min_feedth = 0xFFFF; 240 u8 tx_magn, tx_bias; 241 242 for (i = 0; i < ARRAY_SIZE(tx_magn_values); i++) { 243 tx_magn = tx_magn_values[i]; 244 b43_radio_maskset(dev, 0x52, 0xFF0F, tx_magn); 245 for (j = 0; j < ARRAY_SIZE(tx_bias_values); j++) { 246 tx_bias = tx_bias_values[j]; 247 b43_radio_maskset(dev, 0x52, 0xFFF0, tx_bias); 248 feedthrough = 249 lo_measure_feedthrough(dev, 0, pga, 250 trsw_rx); 251 if (feedthrough < min_feedth) { 252 lo->tx_bias = tx_bias; 253 lo->tx_magn = tx_magn; 254 min_feedth = feedthrough; 255 } 256 if (lo->tx_bias == 0) 257 break; 258 } 259 b43_radio_write16(dev, 0x52, 260 (b43_radio_read16(dev, 0x52) 261 & 0xFF00) | lo->tx_bias | lo-> 262 tx_magn); 263 } 264 } else { 265 lo->tx_magn = 0; 266 lo->tx_bias = 0; 267 b43_radio_mask(dev, 0x52, 0xFFF0); /* TX bias == 0 */ 268 } 269 lo->txctl_measured_time = jiffies; 270} 271 272static void lo_read_power_vector(struct b43_wldev *dev) 273{ 274 struct b43_phy *phy = &dev->phy; 275 struct b43_phy_g *gphy = phy->g; 276 struct b43_txpower_lo_control *lo = gphy->lo_control; 277 int i; 278 u64 tmp; 279 u64 power_vector = 0; 280 281 for (i = 0; i < 8; i += 2) { 282 tmp = b43_shm_read16(dev, B43_SHM_SHARED, 0x310 + i); 283 power_vector |= (tmp << (i * 8)); 284 /* Clear the vector on the device. */ 285 b43_shm_write16(dev, B43_SHM_SHARED, 0x310 + i, 0); 286 } 287 if (power_vector) 288 lo->power_vector = power_vector; 289 lo->pwr_vec_read_time = jiffies; 290} 291 292/* 802.11/LO/GPHY/MeasuringGains */ 293static void lo_measure_gain_values(struct b43_wldev *dev, 294 s16 max_rx_gain, int use_trsw_rx) 295{ 296 struct b43_phy *phy = &dev->phy; 297 struct b43_phy_g *gphy = phy->g; 298 u16 tmp; 299 300 if (max_rx_gain < 0) 301 max_rx_gain = 0; 302 303 if (has_loopback_gain(phy)) { 304 int trsw_rx_gain; 305 306 if (use_trsw_rx) { 307 trsw_rx_gain = gphy->trsw_rx_gain / 2; 308 if (max_rx_gain >= trsw_rx_gain) { 309 trsw_rx_gain = max_rx_gain - trsw_rx_gain; 310 } 311 } else 312 trsw_rx_gain = max_rx_gain; 313 if (trsw_rx_gain < 9) { 314 gphy->lna_lod_gain = 0; 315 } else { 316 gphy->lna_lod_gain = 1; 317 trsw_rx_gain -= 8; 318 } 319 trsw_rx_gain = clamp_val(trsw_rx_gain, 0, 0x2D); 320 gphy->pga_gain = trsw_rx_gain / 3; 321 if (gphy->pga_gain >= 5) { 322 gphy->pga_gain -= 5; 323 gphy->lna_gain = 2; 324 } else 325 gphy->lna_gain = 0; 326 } else { 327 gphy->lna_gain = 0; 328 gphy->trsw_rx_gain = 0x20; 329 if (max_rx_gain >= 0x14) { 330 gphy->lna_lod_gain = 1; 331 gphy->pga_gain = 2; 332 } else if (max_rx_gain >= 0x12) { 333 gphy->lna_lod_gain = 1; 334 gphy->pga_gain = 1; 335 } else if (max_rx_gain >= 0xF) { 336 gphy->lna_lod_gain = 1; 337 gphy->pga_gain = 0; 338 } else { 339 gphy->lna_lod_gain = 0; 340 gphy->pga_gain = 0; 341 } 342 } 343 344 tmp = b43_radio_read16(dev, 0x7A); 345 if (gphy->lna_lod_gain == 0) 346 tmp &= ~0x0008; 347 else 348 tmp |= 0x0008; 349 b43_radio_write16(dev, 0x7A, tmp); 350} 351 352struct lo_g_saved_values { 353 u8 old_channel; 354 355 /* Core registers */ 356 u16 reg_3F4; 357 u16 reg_3E2; 358 359 /* PHY registers */ 360 u16 phy_lo_mask; 361 u16 phy_extg_01; 362 u16 phy_dacctl_hwpctl; 363 u16 phy_dacctl; 364 u16 phy_cck_14; 365 u16 phy_hpwr_tssictl; 366 u16 phy_analogover; 367 u16 phy_analogoverval; 368 u16 phy_rfover; 369 u16 phy_rfoverval; 370 u16 phy_classctl; 371 u16 phy_cck_3E; 372 u16 phy_crs0; 373 u16 phy_pgactl; 374 u16 phy_cck_2A; 375 u16 phy_syncctl; 376 u16 phy_cck_30; 377 u16 phy_cck_06; 378 379 /* Radio registers */ 380 u16 radio_43; 381 u16 radio_7A; 382 u16 radio_52; 383}; 384 385static void lo_measure_setup(struct b43_wldev *dev, 386 struct lo_g_saved_values *sav) 387{ 388 struct ssb_sprom *sprom = dev->dev->bus_sprom; 389 struct b43_phy *phy = &dev->phy; 390 struct b43_phy_g *gphy = phy->g; 391 struct b43_txpower_lo_control *lo = gphy->lo_control; 392 u16 tmp; 393 394 if (b43_has_hardware_pctl(dev)) { 395 sav->phy_lo_mask = b43_phy_read(dev, B43_PHY_LO_MASK); 396 sav->phy_extg_01 = b43_phy_read(dev, B43_PHY_EXTG(0x01)); 397 sav->phy_dacctl_hwpctl = b43_phy_read(dev, B43_PHY_DACCTL); 398 sav->phy_cck_14 = b43_phy_read(dev, B43_PHY_CCK(0x14)); 399 sav->phy_hpwr_tssictl = b43_phy_read(dev, B43_PHY_HPWR_TSSICTL); 400 401 b43_phy_set(dev, B43_PHY_HPWR_TSSICTL, 0x100); 402 b43_phy_set(dev, B43_PHY_EXTG(0x01), 0x40); 403 b43_phy_set(dev, B43_PHY_DACCTL, 0x40); 404 b43_phy_set(dev, B43_PHY_CCK(0x14), 0x200); 405 } 406 if (phy->type == B43_PHYTYPE_B && 407 phy->radio_ver == 0x2050 && phy->radio_rev < 6) { 408 b43_phy_write(dev, B43_PHY_CCK(0x16), 0x410); 409 b43_phy_write(dev, B43_PHY_CCK(0x17), 0x820); 410 } 411 if (phy->rev >= 2) { 412 sav->phy_analogover = b43_phy_read(dev, B43_PHY_ANALOGOVER); 413 sav->phy_analogoverval = 414 b43_phy_read(dev, B43_PHY_ANALOGOVERVAL); 415 sav->phy_rfover = b43_phy_read(dev, B43_PHY_RFOVER); 416 sav->phy_rfoverval = b43_phy_read(dev, B43_PHY_RFOVERVAL); 417 sav->phy_classctl = b43_phy_read(dev, B43_PHY_CLASSCTL); 418 sav->phy_cck_3E = b43_phy_read(dev, B43_PHY_CCK(0x3E)); 419 sav->phy_crs0 = b43_phy_read(dev, B43_PHY_CRS0); 420 421 b43_phy_mask(dev, B43_PHY_CLASSCTL, 0xFFFC); 422 b43_phy_mask(dev, B43_PHY_CRS0, 0x7FFF); 423 b43_phy_set(dev, B43_PHY_ANALOGOVER, 0x0003); 424 b43_phy_mask(dev, B43_PHY_ANALOGOVERVAL, 0xFFFC); 425 if (phy->type == B43_PHYTYPE_G) { 426 if ((phy->rev >= 7) && 427 (sprom->boardflags_lo & B43_BFL_EXTLNA)) { 428 b43_phy_write(dev, B43_PHY_RFOVER, 0x933); 429 } else { 430 b43_phy_write(dev, B43_PHY_RFOVER, 0x133); 431 } 432 } else { 433 b43_phy_write(dev, B43_PHY_RFOVER, 0); 434 } 435 b43_phy_write(dev, B43_PHY_CCK(0x3E), 0); 436 } 437 sav->reg_3F4 = b43_read16(dev, 0x3F4); 438 sav->reg_3E2 = b43_read16(dev, 0x3E2); 439 sav->radio_43 = b43_radio_read16(dev, 0x43); 440 sav->radio_7A = b43_radio_read16(dev, 0x7A); 441 sav->phy_pgactl = b43_phy_read(dev, B43_PHY_PGACTL); 442 sav->phy_cck_2A = b43_phy_read(dev, B43_PHY_CCK(0x2A)); 443 sav->phy_syncctl = b43_phy_read(dev, B43_PHY_SYNCCTL); 444 sav->phy_dacctl = b43_phy_read(dev, B43_PHY_DACCTL); 445 446 if (!has_tx_magnification(phy)) { 447 sav->radio_52 = b43_radio_read16(dev, 0x52); 448 sav->radio_52 &= 0x00F0; 449 } 450 if (phy->type == B43_PHYTYPE_B) { 451 sav->phy_cck_30 = b43_phy_read(dev, B43_PHY_CCK(0x30)); 452 sav->phy_cck_06 = b43_phy_read(dev, B43_PHY_CCK(0x06)); 453 b43_phy_write(dev, B43_PHY_CCK(0x30), 0x00FF); 454 b43_phy_write(dev, B43_PHY_CCK(0x06), 0x3F3F); 455 } else { 456 b43_write16(dev, 0x3E2, b43_read16(dev, 0x3E2) 457 | 0x8000); 458 } 459 b43_write16(dev, 0x3F4, b43_read16(dev, 0x3F4) 460 & 0xF000); 461 462 tmp = 463 (phy->type == B43_PHYTYPE_G) ? B43_PHY_LO_MASK : B43_PHY_CCK(0x2E); 464 b43_phy_write(dev, tmp, 0x007F); 465 466 tmp = sav->phy_syncctl; 467 b43_phy_write(dev, B43_PHY_SYNCCTL, tmp & 0xFF7F); 468 tmp = sav->radio_7A; 469 b43_radio_write16(dev, 0x007A, tmp & 0xFFF0); 470 471 b43_phy_write(dev, B43_PHY_CCK(0x2A), 0x8A3); 472 if (phy->type == B43_PHYTYPE_G || 473 (phy->type == B43_PHYTYPE_B && 474 phy->radio_ver == 0x2050 && phy->radio_rev >= 6)) { 475 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x1003); 476 } else 477 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x0802); 478 if (phy->rev >= 2) 479 b43_dummy_transmission(dev, false, true); 480 b43_gphy_channel_switch(dev, 6, 0); 481 b43_radio_read16(dev, 0x51); /* dummy read */ 482 if (phy->type == B43_PHYTYPE_G) 483 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0); 484 485 /* Re-measure the txctl values, if needed. */ 486 if (time_before(lo->txctl_measured_time, 487 jiffies - B43_LO_TXCTL_EXPIRE)) 488 lo_measure_txctl_values(dev); 489 490 if (phy->type == B43_PHYTYPE_G && phy->rev >= 3) { 491 b43_phy_write(dev, B43_PHY_LO_MASK, 0xC078); 492 } else { 493 if (phy->type == B43_PHYTYPE_B) 494 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078); 495 else 496 b43_phy_write(dev, B43_PHY_LO_MASK, 0x8078); 497 } 498} 499 500static void lo_measure_restore(struct b43_wldev *dev, 501 struct lo_g_saved_values *sav) 502{ 503 struct b43_phy *phy = &dev->phy; 504 struct b43_phy_g *gphy = phy->g; 505 u16 tmp; 506 507 if (phy->rev >= 2) { 508 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300); 509 tmp = (gphy->pga_gain << 8); 510 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA0); 511 udelay(5); 512 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA2); 513 udelay(2); 514 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA3); 515 } else { 516 tmp = (gphy->pga_gain | 0xEFA0); 517 b43_phy_write(dev, B43_PHY_PGACTL, tmp); 518 } 519 if (phy->type == B43_PHYTYPE_G) { 520 if (phy->rev >= 3) 521 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0xC078); 522 else 523 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078); 524 if (phy->rev >= 2) 525 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0202); 526 else 527 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0101); 528 } 529 b43_write16(dev, 0x3F4, sav->reg_3F4); 530 b43_phy_write(dev, B43_PHY_PGACTL, sav->phy_pgactl); 531 b43_phy_write(dev, B43_PHY_CCK(0x2A), sav->phy_cck_2A); 532 b43_phy_write(dev, B43_PHY_SYNCCTL, sav->phy_syncctl); 533 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl); 534 b43_radio_write16(dev, 0x43, sav->radio_43); 535 b43_radio_write16(dev, 0x7A, sav->radio_7A); 536 if (!has_tx_magnification(phy)) { 537 tmp = sav->radio_52; 538 b43_radio_maskset(dev, 0x52, 0xFF0F, tmp); 539 } 540 b43_write16(dev, 0x3E2, sav->reg_3E2); 541 if (phy->type == B43_PHYTYPE_B && 542 phy->radio_ver == 0x2050 && phy->radio_rev <= 5) { 543 b43_phy_write(dev, B43_PHY_CCK(0x30), sav->phy_cck_30); 544 b43_phy_write(dev, B43_PHY_CCK(0x06), sav->phy_cck_06); 545 } 546 if (phy->rev >= 2) { 547 b43_phy_write(dev, B43_PHY_ANALOGOVER, sav->phy_analogover); 548 b43_phy_write(dev, B43_PHY_ANALOGOVERVAL, 549 sav->phy_analogoverval); 550 b43_phy_write(dev, B43_PHY_CLASSCTL, sav->phy_classctl); 551 b43_phy_write(dev, B43_PHY_RFOVER, sav->phy_rfover); 552 b43_phy_write(dev, B43_PHY_RFOVERVAL, sav->phy_rfoverval); 553 b43_phy_write(dev, B43_PHY_CCK(0x3E), sav->phy_cck_3E); 554 b43_phy_write(dev, B43_PHY_CRS0, sav->phy_crs0); 555 } 556 if (b43_has_hardware_pctl(dev)) { 557 tmp = (sav->phy_lo_mask & 0xBFFF); 558 b43_phy_write(dev, B43_PHY_LO_MASK, tmp); 559 b43_phy_write(dev, B43_PHY_EXTG(0x01), sav->phy_extg_01); 560 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl_hwpctl); 561 b43_phy_write(dev, B43_PHY_CCK(0x14), sav->phy_cck_14); 562 b43_phy_write(dev, B43_PHY_HPWR_TSSICTL, sav->phy_hpwr_tssictl); 563 } 564 b43_gphy_channel_switch(dev, sav->old_channel, 1); 565} 566 567struct b43_lo_g_statemachine { 568 int current_state; 569 int nr_measured; 570 int state_val_multiplier; 571 u16 lowest_feedth; 572 struct b43_loctl min_loctl; 573}; 574 575/* Loop over each possible value in this state. */ 576static int lo_probe_possible_loctls(struct b43_wldev *dev, 577 struct b43_loctl *probe_loctl, 578 struct b43_lo_g_statemachine *d) 579{ 580 struct b43_phy *phy = &dev->phy; 581 struct b43_phy_g *gphy = phy->g; 582 struct b43_loctl test_loctl; 583 struct b43_loctl orig_loctl; 584 struct b43_loctl prev_loctl = { 585 .i = -100, 586 .q = -100, 587 }; 588 int i; 589 int begin, end; 590 int found_lower = 0; 591 u16 feedth; 592 593 static const struct b43_loctl modifiers[] = { 594 {.i = 1,.q = 1,}, 595 {.i = 1,.q = 0,}, 596 {.i = 1,.q = -1,}, 597 {.i = 0,.q = -1,}, 598 {.i = -1,.q = -1,}, 599 {.i = -1,.q = 0,}, 600 {.i = -1,.q = 1,}, 601 {.i = 0,.q = 1,}, 602 }; 603 604 if (d->current_state == 0) { 605 begin = 1; 606 end = 8; 607 } else if (d->current_state % 2 == 0) { 608 begin = d->current_state - 1; 609 end = d->current_state + 1; 610 } else { 611 begin = d->current_state - 2; 612 end = d->current_state + 2; 613 } 614 if (begin < 1) 615 begin += 8; 616 if (end > 8) 617 end -= 8; 618 619 memcpy(&orig_loctl, probe_loctl, sizeof(struct b43_loctl)); 620 i = begin; 621 d->current_state = i; 622 while (1) { 623 B43_WARN_ON(!(i >= 1 && i <= 8)); 624 memcpy(&test_loctl, &orig_loctl, sizeof(struct b43_loctl)); 625 test_loctl.i += modifiers[i - 1].i * d->state_val_multiplier; 626 test_loctl.q += modifiers[i - 1].q * d->state_val_multiplier; 627 if ((test_loctl.i != prev_loctl.i || 628 test_loctl.q != prev_loctl.q) && 629 (abs(test_loctl.i) <= 16 && abs(test_loctl.q) <= 16)) { 630 b43_lo_write(dev, &test_loctl); 631 feedth = lo_measure_feedthrough(dev, gphy->lna_gain, 632 gphy->pga_gain, 633 gphy->trsw_rx_gain); 634 if (feedth < d->lowest_feedth) { 635 memcpy(probe_loctl, &test_loctl, 636 sizeof(struct b43_loctl)); 637 found_lower = 1; 638 d->lowest_feedth = feedth; 639 if ((d->nr_measured < 2) && 640 !has_loopback_gain(phy)) 641 break; 642 } 643 } 644 memcpy(&prev_loctl, &test_loctl, sizeof(prev_loctl)); 645 if (i == end) 646 break; 647 if (i == 8) 648 i = 1; 649 else 650 i++; 651 d->current_state = i; 652 } 653 654 return found_lower; 655} 656 657static void lo_probe_loctls_statemachine(struct b43_wldev *dev, 658 struct b43_loctl *loctl, 659 int *max_rx_gain) 660{ 661 struct b43_phy *phy = &dev->phy; 662 struct b43_phy_g *gphy = phy->g; 663 struct b43_lo_g_statemachine d; 664 u16 feedth; 665 int found_lower; 666 struct b43_loctl probe_loctl; 667 int max_repeat = 1, repeat_cnt = 0; 668 669 d.nr_measured = 0; 670 d.state_val_multiplier = 1; 671 if (has_loopback_gain(phy)) 672 d.state_val_multiplier = 3; 673 674 memcpy(&d.min_loctl, loctl, sizeof(struct b43_loctl)); 675 if (has_loopback_gain(phy)) 676 max_repeat = 4; 677 do { 678 b43_lo_write(dev, &d.min_loctl); 679 feedth = lo_measure_feedthrough(dev, gphy->lna_gain, 680 gphy->pga_gain, 681 gphy->trsw_rx_gain); 682 if (feedth < 0x258) { 683 if (feedth >= 0x12C) 684 *max_rx_gain += 6; 685 else 686 *max_rx_gain += 3; 687 feedth = lo_measure_feedthrough(dev, gphy->lna_gain, 688 gphy->pga_gain, 689 gphy->trsw_rx_gain); 690 } 691 d.lowest_feedth = feedth; 692 693 d.current_state = 0; 694 do { 695 B43_WARN_ON(! 696 (d.current_state >= 0 697 && d.current_state <= 8)); 698 memcpy(&probe_loctl, &d.min_loctl, 699 sizeof(struct b43_loctl)); 700 found_lower = 701 lo_probe_possible_loctls(dev, &probe_loctl, &d); 702 if (!found_lower) 703 break; 704 if ((probe_loctl.i == d.min_loctl.i) && 705 (probe_loctl.q == d.min_loctl.q)) 706 break; 707 memcpy(&d.min_loctl, &probe_loctl, 708 sizeof(struct b43_loctl)); 709 d.nr_measured++; 710 } while (d.nr_measured < 24); 711 memcpy(loctl, &d.min_loctl, sizeof(struct b43_loctl)); 712 713 if (has_loopback_gain(phy)) { 714 if (d.lowest_feedth > 0x1194) 715 *max_rx_gain -= 6; 716 else if (d.lowest_feedth < 0x5DC) 717 *max_rx_gain += 3; 718 if (repeat_cnt == 0) { 719 if (d.lowest_feedth <= 0x5DC) { 720 d.state_val_multiplier = 1; 721 repeat_cnt++; 722 } else 723 d.state_val_multiplier = 2; 724 } else if (repeat_cnt == 2) 725 d.state_val_multiplier = 1; 726 } 727 lo_measure_gain_values(dev, *max_rx_gain, 728 has_loopback_gain(phy)); 729 } while (++repeat_cnt < max_repeat); 730} 731 732static 733struct b43_lo_calib *b43_calibrate_lo_setting(struct b43_wldev *dev, 734 const struct b43_bbatt *bbatt, 735 const struct b43_rfatt *rfatt) 736{ 737 struct b43_phy *phy = &dev->phy; 738 struct b43_phy_g *gphy = phy->g; 739 struct b43_loctl loctl = { 740 .i = 0, 741 .q = 0, 742 }; 743 int max_rx_gain; 744 struct b43_lo_calib *cal; 745 struct lo_g_saved_values uninitialized_var(saved_regs); 746 /* Values from the "TXCTL Register and Value Table" */ 747 u16 txctl_reg; 748 u16 txctl_value; 749 u16 pad_mix_gain; 750 751 saved_regs.old_channel = phy->channel; 752 b43_mac_suspend(dev); 753 lo_measure_setup(dev, &saved_regs); 754 755 txctl_reg = lo_txctl_register_table(dev, &txctl_value, &pad_mix_gain); 756 757 b43_radio_maskset(dev, 0x43, 0xFFF0, rfatt->att); 758 b43_radio_maskset(dev, txctl_reg, ~txctl_value, (rfatt->with_padmix ? txctl_value :0)); 759 760 max_rx_gain = rfatt->att * 2; 761 max_rx_gain += bbatt->att / 2; 762 if (rfatt->with_padmix) 763 max_rx_gain -= pad_mix_gain; 764 if (has_loopback_gain(phy)) 765 max_rx_gain += gphy->max_lb_gain; 766 lo_measure_gain_values(dev, max_rx_gain, 767 has_loopback_gain(phy)); 768 769 b43_gphy_set_baseband_attenuation(dev, bbatt->att); 770 lo_probe_loctls_statemachine(dev, &loctl, &max_rx_gain); 771 772 lo_measure_restore(dev, &saved_regs); 773 b43_mac_enable(dev); 774 775 if (b43_debug(dev, B43_DBG_LO)) { 776 b43dbg(dev->wl, "LO: Calibrated for BB(%u), RF(%u,%u) " 777 "=> I=%d Q=%d\n", 778 bbatt->att, rfatt->att, rfatt->with_padmix, 779 loctl.i, loctl.q); 780 } 781 782 cal = kmalloc(sizeof(*cal), GFP_KERNEL); 783 if (!cal) { 784 b43warn(dev->wl, "LO calib: out of memory\n"); 785 return NULL; 786 } 787 memcpy(&cal->bbatt, bbatt, sizeof(*bbatt)); 788 memcpy(&cal->rfatt, rfatt, sizeof(*rfatt)); 789 memcpy(&cal->ctl, &loctl, sizeof(loctl)); 790 cal->calib_time = jiffies; 791 INIT_LIST_HEAD(&cal->list); 792 793 return cal; 794} 795 796/* Get a calibrated LO setting for the given attenuation values. 797 * Might return a NULL pointer under OOM! */ 798static 799struct b43_lo_calib *b43_get_calib_lo_settings(struct b43_wldev *dev, 800 const struct b43_bbatt *bbatt, 801 const struct b43_rfatt *rfatt) 802{ 803 struct b43_txpower_lo_control *lo = dev->phy.g->lo_control; 804 struct b43_lo_calib *c; 805 806 c = b43_find_lo_calib(lo, bbatt, rfatt); 807 if (c) 808 return c; 809 /* Not in the list of calibrated LO settings. 810 * Calibrate it now. */ 811 c = b43_calibrate_lo_setting(dev, bbatt, rfatt); 812 if (!c) 813 return NULL; 814 list_add(&c->list, &lo->calib_list); 815 816 return c; 817} 818 819void b43_gphy_dc_lt_init(struct b43_wldev *dev, bool update_all) 820{ 821 struct b43_phy *phy = &dev->phy; 822 struct b43_phy_g *gphy = phy->g; 823 struct b43_txpower_lo_control *lo = gphy->lo_control; 824 int i; 825 int rf_offset, bb_offset; 826 const struct b43_rfatt *rfatt; 827 const struct b43_bbatt *bbatt; 828 u64 power_vector; 829 bool table_changed = false; 830 831 BUILD_BUG_ON(B43_DC_LT_SIZE != 32); 832 B43_WARN_ON(lo->rfatt_list.len * lo->bbatt_list.len > 64); 833 834 power_vector = lo->power_vector; 835 if (!update_all && !power_vector) 836 return; /* Nothing to do. */ 837 838 /* Suspend the MAC now to avoid continuous suspend/enable 839 * cycles in the loop. */ 840 b43_mac_suspend(dev); 841 842 for (i = 0; i < B43_DC_LT_SIZE * 2; i++) { 843 struct b43_lo_calib *cal; 844 int idx; 845 u16 val; 846 847 if (!update_all && !(power_vector & (((u64)1ULL) << i))) 848 continue; 849 /* Update the table entry for this power_vector bit. 850 * The table rows are RFatt entries and columns are BBatt. */ 851 bb_offset = i / lo->rfatt_list.len; 852 rf_offset = i % lo->rfatt_list.len; 853 bbatt = &(lo->bbatt_list.list[bb_offset]); 854 rfatt = &(lo->rfatt_list.list[rf_offset]); 855 856 cal = b43_calibrate_lo_setting(dev, bbatt, rfatt); 857 if (!cal) { 858 b43warn(dev->wl, "LO: Could not " 859 "calibrate DC table entry\n"); 860 continue; 861 } 862 /*FIXME: Is Q really in the low nibble? */ 863 val = (u8)(cal->ctl.q); 864 val |= ((u8)(cal->ctl.i)) << 4; 865 kfree(cal); 866 867 /* Get the index into the hardware DC LT. */ 868 idx = i / 2; 869 /* Change the table in memory. */ 870 if (i % 2) { 871 /* Change the high byte. */ 872 lo->dc_lt[idx] = (lo->dc_lt[idx] & 0x00FF) 873 | ((val & 0x00FF) << 8); 874 } else { 875 /* Change the low byte. */ 876 lo->dc_lt[idx] = (lo->dc_lt[idx] & 0xFF00) 877 | (val & 0x00FF); 878 } 879 table_changed = true; 880 } 881 if (table_changed) { 882 /* The table changed in memory. Update the hardware table. */ 883 for (i = 0; i < B43_DC_LT_SIZE; i++) 884 b43_phy_write(dev, 0x3A0 + i, lo->dc_lt[i]); 885 } 886 b43_mac_enable(dev); 887} 888 889/* Fixup the RF attenuation value for the case where we are 890 * using the PAD mixer. */ 891static inline void b43_lo_fixup_rfatt(struct b43_rfatt *rf) 892{ 893 if (!rf->with_padmix) 894 return; 895 if ((rf->att != 1) && (rf->att != 2) && (rf->att != 3)) 896 rf->att = 4; 897} 898 899void b43_lo_g_adjust(struct b43_wldev *dev) 900{ 901 struct b43_phy_g *gphy = dev->phy.g; 902 struct b43_lo_calib *cal; 903 struct b43_rfatt rf; 904 905 memcpy(&rf, &gphy->rfatt, sizeof(rf)); 906 b43_lo_fixup_rfatt(&rf); 907 908 cal = b43_get_calib_lo_settings(dev, &gphy->bbatt, &rf); 909 if (!cal) 910 return; 911 b43_lo_write(dev, &cal->ctl); 912} 913 914void b43_lo_g_adjust_to(struct b43_wldev *dev, 915 u16 rfatt, u16 bbatt, u16 tx_control) 916{ 917 struct b43_rfatt rf; 918 struct b43_bbatt bb; 919 struct b43_lo_calib *cal; 920 921 memset(&rf, 0, sizeof(rf)); 922 memset(&bb, 0, sizeof(bb)); 923 rf.att = rfatt; 924 bb.att = bbatt; 925 b43_lo_fixup_rfatt(&rf); 926 cal = b43_get_calib_lo_settings(dev, &bb, &rf); 927 if (!cal) 928 return; 929 b43_lo_write(dev, &cal->ctl); 930} 931 932/* Periodic LO maintanance work */ 933void b43_lo_g_maintanance_work(struct b43_wldev *dev) 934{ 935 struct b43_phy *phy = &dev->phy; 936 struct b43_phy_g *gphy = phy->g; 937 struct b43_txpower_lo_control *lo = gphy->lo_control; 938 unsigned long now; 939 unsigned long expire; 940 struct b43_lo_calib *cal, *tmp; 941 bool current_item_expired = false; 942 bool hwpctl; 943 944 if (!lo) 945 return; 946 now = jiffies; 947 hwpctl = b43_has_hardware_pctl(dev); 948 949 if (hwpctl) { 950 /* Read the power vector and update it, if needed. */ 951 expire = now - B43_LO_PWRVEC_EXPIRE; 952 if (time_before(lo->pwr_vec_read_time, expire)) { 953 lo_read_power_vector(dev); 954 b43_gphy_dc_lt_init(dev, 0); 955 } 956 //FIXME Recalc the whole DC table from time to time? 957 } 958 959 if (hwpctl) 960 return; 961 /* Search for expired LO settings. Remove them. 962 * Recalibrate the current setting, if expired. */ 963 expire = now - B43_LO_CALIB_EXPIRE; 964 list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) { 965 if (!time_before(cal->calib_time, expire)) 966 continue; 967 /* This item expired. */ 968 if (b43_compare_bbatt(&cal->bbatt, &gphy->bbatt) && 969 b43_compare_rfatt(&cal->rfatt, &gphy->rfatt)) { 970 B43_WARN_ON(current_item_expired); 971 current_item_expired = true; 972 } 973 if (b43_debug(dev, B43_DBG_LO)) { 974 b43dbg(dev->wl, "LO: Item BB(%u), RF(%u,%u), " 975 "I=%d, Q=%d expired\n", 976 cal->bbatt.att, cal->rfatt.att, 977 cal->rfatt.with_padmix, 978 cal->ctl.i, cal->ctl.q); 979 } 980 list_del(&cal->list); 981 kfree(cal); 982 } 983 if (current_item_expired || unlikely(list_empty(&lo->calib_list))) { 984 /* Recalibrate currently used LO setting. */ 985 if (b43_debug(dev, B43_DBG_LO)) 986 b43dbg(dev->wl, "LO: Recalibrating current LO setting\n"); 987 cal = b43_calibrate_lo_setting(dev, &gphy->bbatt, &gphy->rfatt); 988 if (cal) { 989 list_add(&cal->list, &lo->calib_list); 990 b43_lo_write(dev, &cal->ctl); 991 } else 992 b43warn(dev->wl, "Failed to recalibrate current LO setting\n"); 993 } 994} 995 996void b43_lo_g_cleanup(struct b43_wldev *dev) 997{ 998 struct b43_txpower_lo_control *lo = dev->phy.g->lo_control; 999 struct b43_lo_calib *cal, *tmp; 1000 1001 if (!lo) 1002 return; 1003 list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) { 1004 list_del(&cal->list); 1005 kfree(cal); 1006 } 1007} 1008 1009/* LO Initialization */ 1010void b43_lo_g_init(struct b43_wldev *dev) 1011{ 1012 if (b43_has_hardware_pctl(dev)) { 1013 lo_read_power_vector(dev); 1014 b43_gphy_dc_lt_init(dev, 1); 1015 } 1016} 1017