ar5416_cal.c revision 203682
1/* 2 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 3 * Copyright (c) 2002-2008 Atheros Communications, Inc. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 * 17 * $FreeBSD: head/sys/dev/ath/ath_hal/ar5416/ar5416_cal.c 203682 2010-02-08 20:12:01Z rpaulo $ 18 */ 19#include "opt_ah.h" 20 21#include "ah.h" 22#include "ah_internal.h" 23#include "ah_devid.h" 24 25#include "ah_eeprom_v14.h" 26 27#include "ar5416/ar5416.h" 28#include "ar5416/ar5416reg.h" 29#include "ar5416/ar5416phy.h" 30 31/* Owl specific stuff */ 32#define NUM_NOISEFLOOR_READINGS 6 /* 3 chains * (ctl + ext) */ 33 34static void ar5416StartNFCal(struct ath_hal *ah); 35static void ar5416LoadNF(struct ath_hal *ah, const struct ieee80211_channel *); 36static int16_t ar5416GetNf(struct ath_hal *, struct ieee80211_channel *); 37 38/* 39 * Determine if calibration is supported by device and channel flags 40 */ 41static OS_INLINE HAL_BOOL 42ar5416IsCalSupp(struct ath_hal *ah, const struct ieee80211_channel *chan, 43 HAL_CAL_TYPE calType) 44{ 45 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 46 47 switch (calType & cal->suppCals) { 48 case IQ_MISMATCH_CAL: 49 /* Run IQ Mismatch for non-CCK only */ 50 return !IEEE80211_IS_CHAN_B(chan); 51 case ADC_GAIN_CAL: 52 case ADC_DC_CAL: 53 /* Run ADC Gain Cal for non-CCK & non 2GHz-HT20 only */ 54 return !IEEE80211_IS_CHAN_B(chan) && 55 !(IEEE80211_IS_CHAN_2GHZ(chan) && IEEE80211_IS_CHAN_HT20(chan)); 56 } 57 return AH_FALSE; 58} 59 60/* 61 * Setup HW to collect samples used for current cal 62 */ 63static void 64ar5416SetupMeasurement(struct ath_hal *ah, HAL_CAL_LIST *currCal) 65{ 66 /* Start calibration w/ 2^(INIT_IQCAL_LOG_COUNT_MAX+1) samples */ 67 OS_REG_RMW_FIELD(ah, AR_PHY_TIMING_CTRL4, 68 AR_PHY_TIMING_CTRL4_IQCAL_LOG_COUNT_MAX, 69 currCal->calData->calCountMax); 70 71 /* Select calibration to run */ 72 switch (currCal->calData->calType) { 73 case IQ_MISMATCH_CAL: 74 OS_REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_IQ); 75 HALDEBUG(ah, HAL_DEBUG_PERCAL, 76 "%s: start IQ Mismatch calibration\n", __func__); 77 break; 78 case ADC_GAIN_CAL: 79 OS_REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_ADC_GAIN); 80 HALDEBUG(ah, HAL_DEBUG_PERCAL, 81 "%s: start ADC Gain calibration\n", __func__); 82 break; 83 case ADC_DC_CAL: 84 OS_REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_ADC_DC_PER); 85 HALDEBUG(ah, HAL_DEBUG_PERCAL, 86 "%s: start ADC DC calibration\n", __func__); 87 break; 88 case ADC_DC_INIT_CAL: 89 OS_REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_ADC_DC_INIT); 90 HALDEBUG(ah, HAL_DEBUG_PERCAL, 91 "%s: start Init ADC DC calibration\n", __func__); 92 break; 93 } 94 /* Kick-off cal */ 95 OS_REG_SET_BIT(ah, AR_PHY_TIMING_CTRL4, AR_PHY_TIMING_CTRL4_DO_CAL); 96} 97 98/* 99 * Initialize shared data structures and prepare a cal to be run. 100 */ 101static void 102ar5416ResetMeasurement(struct ath_hal *ah, HAL_CAL_LIST *currCal) 103{ 104 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 105 106 /* Reset data structures shared between different calibrations */ 107 OS_MEMZERO(cal->caldata, sizeof(cal->caldata)); 108 cal->calSamples = 0; 109 110 /* Setup HW for new calibration */ 111 ar5416SetupMeasurement(ah, currCal); 112 113 /* Change SW state to RUNNING for this calibration */ 114 currCal->calState = CAL_RUNNING; 115} 116 117#if 0 118/* 119 * Run non-periodic calibrations. 120 */ 121static HAL_BOOL 122ar5416RunInitCals(struct ath_hal *ah, int init_cal_count) 123{ 124 struct ath_hal_5416 *ahp = AH5416(ah); 125 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 126 HAL_CHANNEL_INTERNAL ichan; /* XXX bogus */ 127 HAL_CAL_LIST *curCal = ahp->ah_cal_curr; 128 HAL_BOOL isCalDone; 129 int i; 130 131 if (curCal == AH_NULL) 132 return AH_FALSE; 133 134 ichan.calValid = 0; 135 for (i = 0; i < init_cal_count; i++) { 136 /* Reset this Cal */ 137 ar5416ResetMeasurement(ah, curCal); 138 /* Poll for offset calibration complete */ 139 if (!ath_hal_wait(ah, AR_PHY_TIMING_CTRL4, AR_PHY_TIMING_CTRL4_DO_CAL, 0)) { 140 HALDEBUG(ah, HAL_DEBUG_ANY, 141 "%s: Cal %d failed to finish in 100ms.\n", 142 __func__, curCal->calData->calType); 143 /* Re-initialize list pointers for periodic cals */ 144 cal->cal_list = cal->cal_last = cal->cal_curr = AH_NULL; 145 return AH_FALSE; 146 } 147 /* Run this cal */ 148 ar5416DoCalibration(ah, &ichan, ahp->ah_rxchainmask, 149 curCal, &isCalDone); 150 if (!isCalDone) 151 HALDEBUG(ah, HAL_DEBUG_ANY, 152 "%s: init cal %d did not complete.\n", 153 __func__, curCal->calData->calType); 154 if (curCal->calNext != AH_NULL) 155 curCal = curCal->calNext; 156 } 157 158 /* Re-initialize list pointers for periodic cals */ 159 cal->cal_list = cal->cal_last = cal->cal_curr = AH_NULL; 160 return AH_TRUE; 161} 162#endif 163 164/* 165 * Initialize Calibration infrastructure. 166 */ 167HAL_BOOL 168ar5416InitCal(struct ath_hal *ah, const struct ieee80211_channel *chan) 169{ 170 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 171 HAL_CHANNEL_INTERNAL *ichan; 172 173 ichan = ath_hal_checkchannel(ah, chan); 174 HALASSERT(ichan != AH_NULL); 175 if (AR_SREV_KITE_12_OR_LATER(ah)) { 176 OS_REG_SET_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE); 177 if (IEEE80211_IS_CHAN_HT20(chan)) { 178 OS_REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL, 179 AR_PHY_CL_CAL_ENABLE); 180 OS_REG_SET_BIT(ah, AR_PHY_CL_CAL_CTL, 181 AR_PHY_PARALLEL_CAL_ENABLE); 182 OS_REG_SET_BIT(ah, AR_PHY_TURBO, AR_PHY_FC_DYN2040_EN); 183 OS_REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, 184 AR_PHY_AGC_CONTROL_FLTR_CAL); 185 OS_REG_CLR_BIT(ah, AR_PHY_TPCRG1, 186 AR_PHY_TPCRG1_PD_CAL_ENABLE); 187 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, 188 AR_PHY_AGC_CONTROL_CAL); 189 /* Poll for offset calibration complete */ 190 if (!ath_hal_wait(ah, AR_PHY_AGC_CONTROL, 191 AR_PHY_AGC_CONTROL_CAL, 0)) { 192 HALDEBUG(ah, HAL_DEBUG_ANY, 193 "%s: HT offset calibration failed to " 194 "complete in 1ms; noisy environment?\n", 195 __func__); 196 return AH_FALSE; 197 } 198 OS_REG_CLR_BIT(ah, AR_PHY_TURBO, AR_PHY_FC_DYN2040_EN); 199 OS_REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL, 200 AR_PHY_PARALLEL_CAL_ENABLE); 201 } 202 OS_REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE); 203 OS_REG_CLR_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC); 204 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, 205 AR_PHY_AGC_CONTROL_FLTR_CAL); 206 OS_REG_SET_BIT(ah, AR_PHY_TPCRG1, AR_PHY_TPCRG1_PD_CAL_ENABLE); 207 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL); 208 209 /* Poll for offset calibration complete */ 210 if (!ath_hal_wait(ah, AR_PHY_AGC_CONTROL, 211 AR_PHY_AGC_CONTROL_CAL, 0)) { 212 HALDEBUG(ah, HAL_DEBUG_ANY, 213 "%s: offset calibration did not complete in 1ms; " 214 "noisy environment?\n", __func__); 215 return AH_FALSE; 216 } 217 OS_REG_SET_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC); 218 OS_REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE); 219 OS_REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, 220 AR_PHY_AGC_CONTROL_FLTR_CAL); 221 } else if (AR_SREV_MERLIN_10_OR_LATER(ah)) { 222 /* Enable Rx Filter Cal */ 223 OS_REG_CLR_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC); 224 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, 225 AR_PHY_AGC_CONTROL_FLTR_CAL); 226 227 /* Clear the carrier leak cal bit */ 228 OS_REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE); 229 230 /* kick off the cal */ 231 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL); 232 233 /* Poll for offset calibration complete */ 234 if (!ath_hal_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL, 0)) { 235 HALDEBUG(ah, HAL_DEBUG_ANY, 236 "%s: offset calibration failed to complete in 1ms; " 237 "noisy environment?\n", __func__); 238 return AH_FALSE; 239 } 240 241 /* Set the cl cal bit and rerun the cal a 2nd time */ 242 /* Enable Rx Filter Cal */ 243 OS_REG_CLR_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC); 244 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, 245 AR_PHY_AGC_CONTROL_FLTR_CAL); 246 247 OS_REG_SET_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE); 248 } 249 250 /* Calibrate the AGC */ 251 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL); 252 253 /* Poll for offset calibration complete */ 254 if (!ath_hal_wait(ah, AR_PHY_AGC_CONTROL, 255 AR_PHY_AGC_CONTROL_CAL, 0)) { 256 HALDEBUG(ah, HAL_DEBUG_ANY, 257 "%s: AGC offset calibration did not complete in 1ms; " 258 "noisy environment?\n", __func__); 259 return AH_FALSE; 260 } 261 262 /* 263 * Do NF calibration after DC offset and other CALs. 264 * Per system engineers, noise floor value can sometimes be 20 dB 265 * higher than normal value if DC offset and noise floor cal are 266 * triggered at the same time. 267 */ 268 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF); 269 270 /* Initialize list pointers */ 271 cal->cal_list = cal->cal_last = cal->cal_curr = AH_NULL; 272 273 /* 274 * Enable IQ, ADC Gain, ADC DC Offset Cals 275 */ 276 if (AR_SREV_SOWL_10_OR_LATER(ah)) { 277 /* Setup all non-periodic, init time only calibrations */ 278 /* XXX: Init DC Offset not working yet */ 279#if 0 280 if (ar5416IsCalSupp(ah, chan, ADC_DC_INIT_CAL)) { 281 INIT_CAL(&cal->adcDcCalInitData); 282 INSERT_CAL(cal, &cal->adcDcCalInitData); 283 } 284 /* Initialize current pointer to first element in list */ 285 cal->cal_curr = cal->cal_list; 286 287 if (cal->ah_cal_curr != AH_NULL && !ar5416RunInitCals(ah, 0)) 288 return AH_FALSE; 289#endif 290 } 291 292 /* If Cals are supported, add them to list via INIT/INSERT_CAL */ 293 if (ar5416IsCalSupp(ah, chan, ADC_GAIN_CAL)) { 294 INIT_CAL(&cal->adcGainCalData); 295 INSERT_CAL(cal, &cal->adcGainCalData); 296 HALDEBUG(ah, HAL_DEBUG_PERCAL, 297 "%s: enable ADC Gain Calibration.\n", __func__); 298 } 299 if (ar5416IsCalSupp(ah, chan, ADC_DC_CAL)) { 300 INIT_CAL(&cal->adcDcCalData); 301 INSERT_CAL(cal, &cal->adcDcCalData); 302 HALDEBUG(ah, HAL_DEBUG_PERCAL, 303 "%s: enable ADC DC Calibration.\n", __func__); 304 } 305 if (ar5416IsCalSupp(ah, chan, IQ_MISMATCH_CAL)) { 306 INIT_CAL(&cal->iqCalData); 307 INSERT_CAL(cal, &cal->iqCalData); 308 HALDEBUG(ah, HAL_DEBUG_PERCAL, 309 "%s: enable IQ Calibration.\n", __func__); 310 } 311 /* Initialize current pointer to first element in list */ 312 cal->cal_curr = cal->cal_list; 313 314 /* Kick off measurements for the first cal */ 315 if (cal->cal_curr != AH_NULL) 316 ar5416ResetMeasurement(ah, cal->cal_curr); 317 318 /* Mark all calibrations on this channel as being invalid */ 319 ichan->calValid = 0; 320 321 return AH_TRUE; 322} 323 324/* 325 * Entry point for upper layers to restart current cal. 326 * Reset the calibration valid bit in channel. 327 */ 328HAL_BOOL 329ar5416ResetCalValid(struct ath_hal *ah, const struct ieee80211_channel *chan) 330{ 331 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 332 HAL_CHANNEL_INTERNAL *ichan = ath_hal_checkchannel(ah, chan); 333 HAL_CAL_LIST *currCal = cal->cal_curr; 334 335 if (!AR_SREV_SOWL_10_OR_LATER(ah)) 336 return AH_FALSE; 337 if (currCal == AH_NULL) 338 return AH_FALSE; 339 if (ichan == AH_NULL) { 340 HALDEBUG(ah, HAL_DEBUG_ANY, 341 "%s: invalid channel %u/0x%x; no mapping\n", 342 __func__, chan->ic_freq, chan->ic_flags); 343 return AH_FALSE; 344 } 345 /* 346 * Expected that this calibration has run before, post-reset. 347 * Current state should be done 348 */ 349 if (currCal->calState != CAL_DONE) { 350 HALDEBUG(ah, HAL_DEBUG_ANY, 351 "%s: Calibration state incorrect, %d\n", 352 __func__, currCal->calState); 353 return AH_FALSE; 354 } 355 356 /* Verify Cal is supported on this channel */ 357 if (!ar5416IsCalSupp(ah, chan, currCal->calData->calType)) 358 return AH_FALSE; 359 360 HALDEBUG(ah, HAL_DEBUG_PERCAL, 361 "%s: Resetting Cal %d state for channel %u/0x%x\n", 362 __func__, currCal->calData->calType, chan->ic_freq, 363 chan->ic_flags); 364 365 /* Disable cal validity in channel */ 366 ichan->calValid &= ~currCal->calData->calType; 367 currCal->calState = CAL_WAITING; 368 369 return AH_TRUE; 370} 371 372/* 373 * Recalibrate the lower PHY chips to account for temperature/environment 374 * changes. 375 */ 376static void 377ar5416DoCalibration(struct ath_hal *ah, HAL_CHANNEL_INTERNAL *ichan, 378 uint8_t rxchainmask, HAL_CAL_LIST *currCal, HAL_BOOL *isCalDone) 379{ 380 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 381 382 /* Cal is assumed not done until explicitly set below */ 383 *isCalDone = AH_FALSE; 384 385 HALDEBUG(ah, HAL_DEBUG_PERCAL, 386 "%s: %s Calibration, state %d, calValid 0x%x\n", 387 __func__, currCal->calData->calName, currCal->calState, 388 ichan->calValid); 389 390 /* Calibration in progress. */ 391 if (currCal->calState == CAL_RUNNING) { 392 /* Check to see if it has finished. */ 393 if (!(OS_REG_READ(ah, AR_PHY_TIMING_CTRL4) & AR_PHY_TIMING_CTRL4_DO_CAL)) { 394 HALDEBUG(ah, HAL_DEBUG_PERCAL, 395 "%s: sample %d of %d finished\n", 396 __func__, cal->calSamples, 397 currCal->calData->calNumSamples); 398 /* 399 * Collect measurements for active chains. 400 */ 401 currCal->calData->calCollect(ah); 402 if (++cal->calSamples >= currCal->calData->calNumSamples) { 403 int i, numChains = 0; 404 for (i = 0; i < AR5416_MAX_CHAINS; i++) { 405 if (rxchainmask & (1 << i)) 406 numChains++; 407 } 408 /* 409 * Process accumulated data 410 */ 411 currCal->calData->calPostProc(ah, numChains); 412 413 /* Calibration has finished. */ 414 ichan->calValid |= currCal->calData->calType; 415 currCal->calState = CAL_DONE; 416 *isCalDone = AH_TRUE; 417 } else { 418 /* 419 * Set-up to collect of another sub-sample. 420 */ 421 ar5416SetupMeasurement(ah, currCal); 422 } 423 } 424 } else if (!(ichan->calValid & currCal->calData->calType)) { 425 /* If current cal is marked invalid in channel, kick it off */ 426 ar5416ResetMeasurement(ah, currCal); 427 } 428} 429 430/* 431 * Internal interface to schedule periodic calibration work. 432 */ 433HAL_BOOL 434ar5416PerCalibrationN(struct ath_hal *ah, struct ieee80211_channel *chan, 435 u_int rxchainmask, HAL_BOOL longcal, HAL_BOOL *isCalDone) 436{ 437 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 438 HAL_CAL_LIST *currCal = cal->cal_curr; 439 HAL_CHANNEL_INTERNAL *ichan; 440 441 OS_MARK(ah, AH_MARK_PERCAL, chan->ic_freq); 442 443 *isCalDone = AH_TRUE; 444 445 /* Invalid channel check */ 446 ichan = ath_hal_checkchannel(ah, chan); 447 if (ichan == AH_NULL) { 448 HALDEBUG(ah, HAL_DEBUG_ANY, 449 "%s: invalid channel %u/0x%x; no mapping\n", 450 __func__, chan->ic_freq, chan->ic_flags); 451 return AH_FALSE; 452 } 453 454 /* 455 * For given calibration: 456 * 1. Call generic cal routine 457 * 2. When this cal is done (isCalDone) if we have more cals waiting 458 * (eg after reset), mask this to upper layers by not propagating 459 * isCalDone if it is set to TRUE. 460 * Instead, change isCalDone to FALSE and setup the waiting cal(s) 461 * to be run. 462 */ 463 if (currCal != AH_NULL && 464 (currCal->calState == CAL_RUNNING || 465 currCal->calState == CAL_WAITING)) { 466 ar5416DoCalibration(ah, ichan, rxchainmask, currCal, isCalDone); 467 if (*isCalDone == AH_TRUE) { 468 cal->cal_curr = currCal = currCal->calNext; 469 if (currCal->calState == CAL_WAITING) { 470 *isCalDone = AH_FALSE; 471 ar5416ResetMeasurement(ah, currCal); 472 } 473 } 474 } 475 476 /* Do NF cal only at longer intervals */ 477 if (longcal) { 478 /* 479 * Get the value from the previous NF cal 480 * and update the history buffer. 481 */ 482 ar5416GetNf(ah, chan); 483 484 /* 485 * Load the NF from history buffer of the current channel. 486 * NF is slow time-variant, so it is OK to use a 487 * historical value. 488 */ 489 ar5416LoadNF(ah, AH_PRIVATE(ah)->ah_curchan); 490 491 /* start NF calibration, without updating BB NF register*/ 492 ar5416StartNFCal(ah); 493 } 494 return AH_TRUE; 495} 496 497/* 498 * Recalibrate the lower PHY chips to account for temperature/environment 499 * changes. 500 */ 501HAL_BOOL 502ar5416PerCalibration(struct ath_hal *ah, struct ieee80211_channel *chan, 503 HAL_BOOL *isIQdone) 504{ 505 struct ath_hal_5416 *ahp = AH5416(ah); 506 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 507 HAL_CAL_LIST *curCal = cal->cal_curr; 508 509 if (curCal != AH_NULL && curCal->calData->calType == IQ_MISMATCH_CAL) { 510 return ar5416PerCalibrationN(ah, chan, ahp->ah_rx_chainmask, 511 AH_TRUE, isIQdone); 512 } else { 513 HAL_BOOL isCalDone; 514 515 *isIQdone = AH_FALSE; 516 return ar5416PerCalibrationN(ah, chan, ahp->ah_rx_chainmask, 517 AH_TRUE, &isCalDone); 518 } 519} 520 521static HAL_BOOL 522ar5416GetEepromNoiseFloorThresh(struct ath_hal *ah, 523 const struct ieee80211_channel *chan, int16_t *nft) 524{ 525 if (IEEE80211_IS_CHAN_5GHZ(chan)) { 526 ath_hal_eepromGet(ah, AR_EEP_NFTHRESH_5, nft); 527 return AH_TRUE; 528 } 529 if (IEEE80211_IS_CHAN_2GHZ(chan)) { 530 ath_hal_eepromGet(ah, AR_EEP_NFTHRESH_2, nft); 531 return AH_TRUE; 532 } 533 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: invalid channel flags 0x%x\n", 534 __func__, chan->ic_flags); 535 return AH_FALSE; 536} 537 538static void 539ar5416StartNFCal(struct ath_hal *ah) 540{ 541 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_ENABLE_NF); 542 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NO_UPDATE_NF); 543 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF); 544} 545 546static void 547ar5416LoadNF(struct ath_hal *ah, const struct ieee80211_channel *chan) 548{ 549 static const uint32_t ar5416_cca_regs[] = { 550 AR_PHY_CCA, 551 AR_PHY_CH1_CCA, 552 AR_PHY_CH2_CCA, 553 AR_PHY_EXT_CCA, 554 AR_PHY_CH1_EXT_CCA, 555 AR_PHY_CH2_EXT_CCA 556 }; 557 struct ar5212NfCalHist *h; 558 int i, j; 559 int32_t val; 560 uint8_t chainmask; 561 562 /* 563 * Force NF calibration for all chains. 564 */ 565 if (AR_SREV_KITE(ah)) { 566 /* Kite has only one chain */ 567 chainmask = 0x9; 568 } else if (AR_SREV_MERLIN(ah)) { 569 /* Merlin has only two chains */ 570 chainmask = 0x1B; 571 } else { 572 chainmask = 0x3F; 573 } 574 575 /* 576 * Write filtered NF values into maxCCApwr register parameter 577 * so we can load below. 578 */ 579 h = AH5416(ah)->ah_cal.nfCalHist; 580 for (i = 0; i < AR5416_NUM_NF_READINGS; i ++) 581 if (chainmask & (1 << i)) { 582 val = OS_REG_READ(ah, ar5416_cca_regs[i]); 583 val &= 0xFFFFFE00; 584 val |= (((uint32_t)(h[i].privNF) << 1) & 0x1ff); 585 OS_REG_WRITE(ah, ar5416_cca_regs[i], val); 586 } 587 588 /* Load software filtered NF value into baseband internal minCCApwr variable. */ 589 OS_REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_ENABLE_NF); 590 OS_REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NO_UPDATE_NF); 591 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF); 592 593 /* Wait for load to complete, should be fast, a few 10s of us. */ 594 for (j = 0; j < 1000; j++) { 595 if ((OS_REG_READ(ah, AR_PHY_AGC_CONTROL) & AR_PHY_AGC_CONTROL_NF) == 0) 596 break; 597 OS_DELAY(10); 598 } 599 600 /* 601 * Restore maxCCAPower register parameter again so that we're not capped 602 * by the median we just loaded. This will be initial (and max) value 603 * of next noise floor calibration the baseband does. 604 */ 605 for (i = 0; i < AR5416_NUM_NF_READINGS; i ++) 606 if (chainmask & (1 << i)) { 607 val = OS_REG_READ(ah, ar5416_cca_regs[i]); 608 val &= 0xFFFFFE00; 609 val |= (((uint32_t)(-50) << 1) & 0x1ff); 610 OS_REG_WRITE(ah, ar5416_cca_regs[i], val); 611 } 612} 613 614void 615ar5416InitNfHistBuff(struct ath_hal *ah, struct ar5212NfCalHist *h) 616{ 617 int i, j; 618 int16_t privNF; 619 620 if (AR_SREV_KITE(ah)) 621 privNF = AR9285_CCA_MAX_GOOD_VALUE; 622 else 623 privNF = AR5416_CCA_MAX_GOOD_VALUE; 624 625 for (i = 0; i < AR5416_NUM_NF_READINGS; i ++) { 626 h[i].currIndex = 0; 627 h[i].privNF = AR5416_CCA_MAX_GOOD_VALUE; 628 h[i].invalidNFcount = AR512_NF_CAL_HIST_MAX; 629 for (j = 0; j < AR512_NF_CAL_HIST_MAX; j ++) 630 h[i].nfCalBuffer[j] = AR5416_CCA_MAX_GOOD_VALUE; 631 } 632} 633 634/* 635 * Update the noise floor buffer as a ring buffer 636 */ 637static void 638ar5416UpdateNFHistBuff(struct ar5212NfCalHist *h, int16_t *nfarray) 639{ 640 int i; 641 642 for (i = 0; i < AR5416_NUM_NF_READINGS; i ++) { 643 h[i].nfCalBuffer[h[i].currIndex] = nfarray[i]; 644 645 if (++h[i].currIndex >= AR512_NF_CAL_HIST_MAX) 646 h[i].currIndex = 0; 647 if (h[i].invalidNFcount > 0) { 648 if (nfarray[i] < AR5416_CCA_MIN_BAD_VALUE || 649 nfarray[i] > AR5416_CCA_MAX_HIGH_VALUE) { 650 h[i].invalidNFcount = AR512_NF_CAL_HIST_MAX; 651 } else { 652 h[i].invalidNFcount--; 653 h[i].privNF = nfarray[i]; 654 } 655 } else { 656 h[i].privNF = ar5212GetNfHistMid(h[i].nfCalBuffer); 657 } 658 } 659} 660 661/* 662 * Read the NF and check it against the noise floor threshhold 663 */ 664static int16_t 665ar5416GetNf(struct ath_hal *ah, struct ieee80211_channel *chan) 666{ 667 int16_t nf, nfThresh; 668 669 if (OS_REG_READ(ah, AR_PHY_AGC_CONTROL) & AR_PHY_AGC_CONTROL_NF) { 670 HALDEBUG(ah, HAL_DEBUG_ANY, 671 "%s: NF didn't complete in calibration window\n", __func__); 672 nf = 0; 673 } else { 674 /* Finished NF cal, check against threshold */ 675 int16_t nfarray[NUM_NOISEFLOOR_READINGS] = { 0 }; 676 HAL_CHANNEL_INTERNAL *ichan = ath_hal_checkchannel(ah, chan); 677 678 /* TODO - enhance for multiple chains and ext ch */ 679 ath_hal_getNoiseFloor(ah, nfarray); 680 nf = nfarray[0]; 681 if (ar5416GetEepromNoiseFloorThresh(ah, chan, &nfThresh)) { 682 if (nf > nfThresh) { 683 HALDEBUG(ah, HAL_DEBUG_ANY, 684 "%s: noise floor failed detected; " 685 "detected %d, threshold %d\n", __func__, 686 nf, nfThresh); 687 /* 688 * NB: Don't discriminate 2.4 vs 5Ghz, if this 689 * happens it indicates a problem regardless 690 * of the band. 691 */ 692 chan->ic_state |= IEEE80211_CHANSTATE_CWINT; 693 nf = 0; 694 } 695 } else { 696 nf = 0; 697 } 698 ar5416UpdateNFHistBuff(AH5416(ah)->ah_cal.nfCalHist, nfarray); 699 ichan->rawNoiseFloor = nf; 700 } 701 return nf; 702} 703