ar5416_cal.c revision 203159
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 203159 2010-01-29 10:10:14Z 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); 175 176 if (AR_SREV_KITE_12_OR_LATER(ah)) { 177 /* Clear the carrier leak cal bit */ 178 OS_REG_SET_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE); 179 180 if (IEEE80211_IS_CHAN_HT20(chan)) { 181 OS_REG_SET_BIT(ah, AR_PHY_CL_CAL_CTL, 182 AR_PHY_PARALLEL_CAL_ENABLE); 183 OS_REG_SET_BIT(ah, AR_PHY_TURBO, AR_PHY_FC_DYN2040_EN); 184 OS_REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, 185 AR_PHY_AGC_CONTROL_FLTR_CAL); 186 OS_REG_CLR_BIT(ah, AR_PHY_TPCRG1, 187 AR_PHY_TPCRG1_PD_CAL_ENABLE); 188 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, 189 AR_PHY_AGC_CONTROL_CAL); 190 /* Poll for offset calibration complete */ 191 if (!ath_hal_wait(ah, AR_PHY_AGC_CONTROL, 192 AR_PHY_AGC_CONTROL_CAL, 0)) { 193 HALDEBUG(ah, HAL_DEBUG_ANY, 194 "%s: offset calibration failed to " 195 "complete in 1ms; noisy environment?\n", 196 __func__); 197 return AH_FALSE; 198 } 199 OS_REG_CLR_BIT(ah, AR_PHY_TURBO, AR_PHY_FC_DYN2040_EN); 200 OS_REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL, 201 AR_PHY_PARALLEL_CAL_ENABLE); 202 } 203 OS_REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE); 204 205 /* Enable Rx Filter Cal */ 206 OS_REG_CLR_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC); 207 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, 208 AR_PHY_AGC_CONTROL_FLTR_CAL); 209 OS_REG_SET_BIT(ah, AR_PHY_TPCRG1, AR_PHY_TPCRG1_PD_CAL_ENABLE); 210 211 /* kick off the cal */ 212 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL); 213 214 /* Poll for offset calibration complete */ 215 if (!ath_hal_wait(ah, AR_PHY_AGC_CONTROL, 216 AR_PHY_AGC_CONTROL_CAL, 0)) { 217 HALDEBUG(ah, HAL_DEBUG_ANY, 218 "%s: offset calibration did not complete in 1ms; " 219 "noisy environment?\n", __func__); 220 return AH_FALSE; 221 } 222 /* Set the cl cal bit and rerun the cal a 2nd time */ 223 /* Enable Rx Filter Cal */ 224 OS_REG_SET_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC); 225 OS_REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE); 226 OS_REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, 227 AR_PHY_AGC_CONTROL_FLTR_CAL); 228 } else if (AR_SREV_MERLIN_10_OR_LATER(ah)) { 229 /* Enable Rx Filter Cal */ 230 OS_REG_CLR_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC); 231 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, 232 AR_PHY_AGC_CONTROL_FLTR_CAL); 233 234 /* Clear the carrier leak cal bit */ 235 OS_REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE); 236 237 /* kick off the cal */ 238 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL); 239 240 /* Poll for offset calibration complete */ 241 if (!ath_hal_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL, 0)) { 242 HALDEBUG(ah, HAL_DEBUG_ANY, 243 "%s: offset calibration failed to complete in 1ms; " 244 "noisy environment?\n", __func__); 245 return AH_FALSE; 246 } 247 248 /* Set the cl cal bit and rerun the cal a 2nd time */ 249 /* Enable Rx Filter Cal */ 250 OS_REG_CLR_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC); 251 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, 252 AR_PHY_AGC_CONTROL_FLTR_CAL); 253 254 OS_REG_SET_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE); 255 } 256 257 /* Calibrate the AGC */ 258 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL); 259 260 /* Poll for offset calibration complete */ 261 if (!ath_hal_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL, 0)) { 262 HALDEBUG(ah, HAL_DEBUG_ANY, 263 "%s: offset calibration did not complete in 1ms; " 264 "noisy environment?\n", __func__); 265 return AH_FALSE; 266 } 267 268 /* 269 * Do NF calibration after DC offset and other CALs. 270 * Per system engineers, noise floor value can sometimes be 20 dB 271 * higher than normal value if DC offset and noise floor cal are 272 * triggered at the same time. 273 */ 274 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF); 275 276 /* Initialize list pointers */ 277 cal->cal_list = cal->cal_last = cal->cal_curr = AH_NULL; 278 279 /* 280 * Enable IQ, ADC Gain, ADC DC Offset Cals 281 */ 282 if (AR_SREV_SOWL_10_OR_LATER(ah)) { 283 /* Setup all non-periodic, init time only calibrations */ 284 /* XXX: Init DC Offset not working yet */ 285#if 0 286 if (ar5416IsCalSupp(ah, chan, ADC_DC_INIT_CAL)) { 287 INIT_CAL(&cal->adcDcCalInitData); 288 INSERT_CAL(cal, &cal->adcDcCalInitData); 289 } 290 /* Initialize current pointer to first element in list */ 291 cal->cal_curr = cal->cal_list; 292 293 if (cal->ah_cal_curr != AH_NULL && !ar5416RunInitCals(ah, 0)) 294 return AH_FALSE; 295#endif 296 } 297 298 /* If Cals are supported, add them to list via INIT/INSERT_CAL */ 299 if (ar5416IsCalSupp(ah, chan, ADC_GAIN_CAL)) { 300 INIT_CAL(&cal->adcGainCalData); 301 INSERT_CAL(cal, &cal->adcGainCalData); 302 HALDEBUG(ah, HAL_DEBUG_PERCAL, 303 "%s: enable ADC Gain Calibration.\n", __func__); 304 } 305 if (ar5416IsCalSupp(ah, chan, ADC_DC_CAL)) { 306 INIT_CAL(&cal->adcDcCalData); 307 INSERT_CAL(cal, &cal->adcDcCalData); 308 HALDEBUG(ah, HAL_DEBUG_PERCAL, 309 "%s: enable ADC DC Calibration.\n", __func__); 310 } 311 if (ar5416IsCalSupp(ah, chan, IQ_MISMATCH_CAL)) { 312 INIT_CAL(&cal->iqCalData); 313 INSERT_CAL(cal, &cal->iqCalData); 314 HALDEBUG(ah, HAL_DEBUG_PERCAL, 315 "%s: enable IQ Calibration.\n", __func__); 316 } 317 /* Initialize current pointer to first element in list */ 318 cal->cal_curr = cal->cal_list; 319 320 /* Kick off measurements for the first cal */ 321 if (cal->cal_curr != AH_NULL) 322 ar5416ResetMeasurement(ah, cal->cal_curr); 323 324 /* Mark all calibrations on this channel as being invalid */ 325 ichan->calValid = 0; 326 327 return AH_TRUE; 328} 329 330/* 331 * Entry point for upper layers to restart current cal. 332 * Reset the calibration valid bit in channel. 333 */ 334HAL_BOOL 335ar5416ResetCalValid(struct ath_hal *ah, const struct ieee80211_channel *chan) 336{ 337 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 338 HAL_CHANNEL_INTERNAL *ichan = ath_hal_checkchannel(ah, chan); 339 HAL_CAL_LIST *currCal = cal->cal_curr; 340 341 if (!AR_SREV_SOWL_10_OR_LATER(ah)) 342 return AH_FALSE; 343 if (currCal == AH_NULL) 344 return AH_FALSE; 345 if (ichan == AH_NULL) { 346 HALDEBUG(ah, HAL_DEBUG_ANY, 347 "%s: invalid channel %u/0x%x; no mapping\n", 348 __func__, chan->ic_freq, chan->ic_flags); 349 return AH_FALSE; 350 } 351 /* 352 * Expected that this calibration has run before, post-reset. 353 * Current state should be done 354 */ 355 if (currCal->calState != CAL_DONE) { 356 HALDEBUG(ah, HAL_DEBUG_ANY, 357 "%s: Calibration state incorrect, %d\n", 358 __func__, currCal->calState); 359 return AH_FALSE; 360 } 361 362 /* Verify Cal is supported on this channel */ 363 if (!ar5416IsCalSupp(ah, chan, currCal->calData->calType)) 364 return AH_FALSE; 365 366 HALDEBUG(ah, HAL_DEBUG_PERCAL, 367 "%s: Resetting Cal %d state for channel %u/0x%x\n", 368 __func__, currCal->calData->calType, chan->ic_freq, 369 chan->ic_flags); 370 371 /* Disable cal validity in channel */ 372 ichan->calValid &= ~currCal->calData->calType; 373 currCal->calState = CAL_WAITING; 374 375 return AH_TRUE; 376} 377 378/* 379 * Recalibrate the lower PHY chips to account for temperature/environment 380 * changes. 381 */ 382static void 383ar5416DoCalibration(struct ath_hal *ah, HAL_CHANNEL_INTERNAL *ichan, 384 uint8_t rxchainmask, HAL_CAL_LIST *currCal, HAL_BOOL *isCalDone) 385{ 386 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 387 388 /* Cal is assumed not done until explicitly set below */ 389 *isCalDone = AH_FALSE; 390 391 HALDEBUG(ah, HAL_DEBUG_PERCAL, 392 "%s: %s Calibration, state %d, calValid 0x%x\n", 393 __func__, currCal->calData->calName, currCal->calState, 394 ichan->calValid); 395 396 /* Calibration in progress. */ 397 if (currCal->calState == CAL_RUNNING) { 398 /* Check to see if it has finished. */ 399 if (!(OS_REG_READ(ah, AR_PHY_TIMING_CTRL4) & AR_PHY_TIMING_CTRL4_DO_CAL)) { 400 HALDEBUG(ah, HAL_DEBUG_PERCAL, 401 "%s: sample %d of %d finished\n", 402 __func__, cal->calSamples, 403 currCal->calData->calNumSamples); 404 /* 405 * Collect measurements for active chains. 406 */ 407 currCal->calData->calCollect(ah); 408 if (++cal->calSamples >= currCal->calData->calNumSamples) { 409 int i, numChains = 0; 410 for (i = 0; i < AR5416_MAX_CHAINS; i++) { 411 if (rxchainmask & (1 << i)) 412 numChains++; 413 } 414 /* 415 * Process accumulated data 416 */ 417 currCal->calData->calPostProc(ah, numChains); 418 419 /* Calibration has finished. */ 420 ichan->calValid |= currCal->calData->calType; 421 currCal->calState = CAL_DONE; 422 *isCalDone = AH_TRUE; 423 } else { 424 /* 425 * Set-up to collect of another sub-sample. 426 */ 427 ar5416SetupMeasurement(ah, currCal); 428 } 429 } 430 } else if (!(ichan->calValid & currCal->calData->calType)) { 431 /* If current cal is marked invalid in channel, kick it off */ 432 ar5416ResetMeasurement(ah, currCal); 433 } 434} 435 436/* 437 * Internal interface to schedule periodic calibration work. 438 */ 439HAL_BOOL 440ar5416PerCalibrationN(struct ath_hal *ah, struct ieee80211_channel *chan, 441 u_int rxchainmask, HAL_BOOL longcal, HAL_BOOL *isCalDone) 442{ 443 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 444 HAL_CAL_LIST *currCal = cal->cal_curr; 445 HAL_CHANNEL_INTERNAL *ichan; 446 447 OS_MARK(ah, AH_MARK_PERCAL, chan->ic_freq); 448 449 *isCalDone = AH_TRUE; 450 451 /* Invalid channel check */ 452 ichan = ath_hal_checkchannel(ah, chan); 453 if (ichan == AH_NULL) { 454 HALDEBUG(ah, HAL_DEBUG_ANY, 455 "%s: invalid channel %u/0x%x; no mapping\n", 456 __func__, chan->ic_freq, chan->ic_flags); 457 return AH_FALSE; 458 } 459 460 /* 461 * For given calibration: 462 * 1. Call generic cal routine 463 * 2. When this cal is done (isCalDone) if we have more cals waiting 464 * (eg after reset), mask this to upper layers by not propagating 465 * isCalDone if it is set to TRUE. 466 * Instead, change isCalDone to FALSE and setup the waiting cal(s) 467 * to be run. 468 */ 469 if (currCal != AH_NULL && 470 (currCal->calState == CAL_RUNNING || 471 currCal->calState == CAL_WAITING)) { 472 ar5416DoCalibration(ah, ichan, rxchainmask, currCal, isCalDone); 473 if (*isCalDone == AH_TRUE) { 474 cal->cal_curr = currCal = currCal->calNext; 475 if (currCal->calState == CAL_WAITING) { 476 *isCalDone = AH_FALSE; 477 ar5416ResetMeasurement(ah, currCal); 478 } 479 } 480 } 481 482 /* Do NF cal only at longer intervals */ 483 if (longcal) { 484 /* 485 * Get the value from the previous NF cal 486 * and update the history buffer. 487 */ 488 ar5416GetNf(ah, chan); 489 490 /* 491 * Load the NF from history buffer of the current channel. 492 * NF is slow time-variant, so it is OK to use a 493 * historical value. 494 */ 495 ar5416LoadNF(ah, AH_PRIVATE(ah)->ah_curchan); 496 497 /* start NF calibration, without updating BB NF register*/ 498 ar5416StartNFCal(ah); 499 } 500 return AH_TRUE; 501} 502 503/* 504 * Recalibrate the lower PHY chips to account for temperature/environment 505 * changes. 506 */ 507HAL_BOOL 508ar5416PerCalibration(struct ath_hal *ah, struct ieee80211_channel *chan, 509 HAL_BOOL *isIQdone) 510{ 511 struct ath_hal_5416 *ahp = AH5416(ah); 512 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 513 HAL_CAL_LIST *curCal = cal->cal_curr; 514 515 if (curCal != AH_NULL && curCal->calData->calType == IQ_MISMATCH_CAL) { 516 return ar5416PerCalibrationN(ah, chan, ahp->ah_rx_chainmask, 517 AH_TRUE, isIQdone); 518 } else { 519 HAL_BOOL isCalDone; 520 521 *isIQdone = AH_FALSE; 522 return ar5416PerCalibrationN(ah, chan, ahp->ah_rx_chainmask, 523 AH_TRUE, &isCalDone); 524 } 525} 526 527static HAL_BOOL 528ar5416GetEepromNoiseFloorThresh(struct ath_hal *ah, 529 const struct ieee80211_channel *chan, int16_t *nft) 530{ 531 if (IEEE80211_IS_CHAN_5GHZ(chan)) { 532 ath_hal_eepromGet(ah, AR_EEP_NFTHRESH_5, nft); 533 return AH_TRUE; 534 } 535 if (IEEE80211_IS_CHAN_2GHZ(chan)) { 536 ath_hal_eepromGet(ah, AR_EEP_NFTHRESH_2, nft); 537 return AH_TRUE; 538 } 539 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: invalid channel flags 0x%x\n", 540 __func__, chan->ic_flags); 541 return AH_FALSE; 542} 543 544static void 545ar5416StartNFCal(struct ath_hal *ah) 546{ 547 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_ENABLE_NF); 548 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NO_UPDATE_NF); 549 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF); 550} 551 552static void 553ar5416LoadNF(struct ath_hal *ah, const struct ieee80211_channel *chan) 554{ 555 static const uint32_t ar5416_cca_regs[] = { 556 AR_PHY_CCA, 557 AR_PHY_CH1_CCA, 558 AR_PHY_CH2_CCA, 559 AR_PHY_EXT_CCA, 560 AR_PHY_CH1_EXT_CCA, 561 AR_PHY_CH2_EXT_CCA 562 }; 563 struct ar5212NfCalHist *h; 564 int i, j; 565 int32_t val; 566 uint8_t chainmask; 567 568 /* 569 * Force NF calibration for all chains. 570 */ 571 if (AR_SREV_KITE(ah)) { 572 /* Kite has only one chain */ 573 chainmask = 0x9; 574 } else if (AR_SREV_MERLIN(ah)) { 575 /* Merlin has only two chains */ 576 chainmask = 0x1B; 577 } else { 578 chainmask = 0x3F; 579 } 580 581 /* 582 * Write filtered NF values into maxCCApwr register parameter 583 * so we can load below. 584 */ 585 h = AH5416(ah)->ah_cal.nfCalHist; 586 for (i = 0; i < AR5416_NUM_NF_READINGS; i ++) 587 if (chainmask & (1 << i)) { 588 val = OS_REG_READ(ah, ar5416_cca_regs[i]); 589 val &= 0xFFFFFE00; 590 val |= (((uint32_t)(h[i].privNF) << 1) & 0x1ff); 591 OS_REG_WRITE(ah, ar5416_cca_regs[i], val); 592 } 593 594 /* Load software filtered NF value into baseband internal minCCApwr variable. */ 595 OS_REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_ENABLE_NF); 596 OS_REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NO_UPDATE_NF); 597 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF); 598 599 /* Wait for load to complete, should be fast, a few 10s of us. */ 600 for (j = 0; j < 1000; j++) { 601 if ((OS_REG_READ(ah, AR_PHY_AGC_CONTROL) & AR_PHY_AGC_CONTROL_NF) == 0) 602 break; 603 OS_DELAY(10); 604 } 605 606 /* 607 * Restore maxCCAPower register parameter again so that we're not capped 608 * by the median we just loaded. This will be initial (and max) value 609 * of next noise floor calibration the baseband does. 610 */ 611 for (i = 0; i < AR5416_NUM_NF_READINGS; i ++) 612 if (chainmask & (1 << i)) { 613 val = OS_REG_READ(ah, ar5416_cca_regs[i]); 614 val &= 0xFFFFFE00; 615 val |= (((uint32_t)(-50) << 1) & 0x1ff); 616 OS_REG_WRITE(ah, ar5416_cca_regs[i], val); 617 } 618} 619 620void 621ar5416InitNfHistBuff(struct ath_hal *ah, struct ar5212NfCalHist *h) 622{ 623 int i, j; 624 int16_t privNF; 625 626 if (AR_SREV_KITE(ah)) 627 privNF = AR9285_CCA_MAX_GOOD_VALUE; 628 else 629 privNF = AR5416_CCA_MAX_GOOD_VALUE; 630 631 for (i = 0; i < AR5416_NUM_NF_READINGS; i ++) { 632 h[i].currIndex = 0; 633 h[i].privNF = AR5416_CCA_MAX_GOOD_VALUE; 634 h[i].invalidNFcount = AR512_NF_CAL_HIST_MAX; 635 for (j = 0; j < AR512_NF_CAL_HIST_MAX; j ++) 636 h[i].nfCalBuffer[j] = AR5416_CCA_MAX_GOOD_VALUE; 637 } 638} 639 640/* 641 * Update the noise floor buffer as a ring buffer 642 */ 643static void 644ar5416UpdateNFHistBuff(struct ar5212NfCalHist *h, int16_t *nfarray) 645{ 646 int i; 647 648 for (i = 0; i < AR5416_NUM_NF_READINGS; i ++) { 649 h[i].nfCalBuffer[h[i].currIndex] = nfarray[i]; 650 651 if (++h[i].currIndex >= AR512_NF_CAL_HIST_MAX) 652 h[i].currIndex = 0; 653 if (h[i].invalidNFcount > 0) { 654 if (nfarray[i] < AR5416_CCA_MIN_BAD_VALUE || 655 nfarray[i] > AR5416_CCA_MAX_HIGH_VALUE) { 656 h[i].invalidNFcount = AR512_NF_CAL_HIST_MAX; 657 } else { 658 h[i].invalidNFcount--; 659 h[i].privNF = nfarray[i]; 660 } 661 } else { 662 h[i].privNF = ar5212GetNfHistMid(h[i].nfCalBuffer); 663 } 664 } 665} 666 667/* 668 * Read the NF and check it against the noise floor threshhold 669 */ 670static int16_t 671ar5416GetNf(struct ath_hal *ah, struct ieee80211_channel *chan) 672{ 673 int16_t nf, nfThresh; 674 675 if (OS_REG_READ(ah, AR_PHY_AGC_CONTROL) & AR_PHY_AGC_CONTROL_NF) { 676 HALDEBUG(ah, HAL_DEBUG_ANY, 677 "%s: NF didn't complete in calibration window\n", __func__); 678 nf = 0; 679 } else { 680 /* Finished NF cal, check against threshold */ 681 int16_t nfarray[NUM_NOISEFLOOR_READINGS] = { 0 }; 682 HAL_CHANNEL_INTERNAL *ichan = ath_hal_checkchannel(ah, chan); 683 684 /* TODO - enhance for multiple chains and ext ch */ 685 ath_hal_getNoiseFloor(ah, nfarray); 686 nf = nfarray[0]; 687 if (ar5416GetEepromNoiseFloorThresh(ah, chan, &nfThresh)) { 688 if (nf > nfThresh) { 689 HALDEBUG(ah, HAL_DEBUG_ANY, 690 "%s: noise floor failed detected; " 691 "detected %d, threshold %d\n", __func__, 692 nf, nfThresh); 693 /* 694 * NB: Don't discriminate 2.4 vs 5Ghz, if this 695 * happens it indicates a problem regardless 696 * of the band. 697 */ 698 chan->ic_state |= IEEE80211_CHANSTATE_CWINT; 699 nf = 0; 700 } 701 } else { 702 nf = 0; 703 } 704 ar5416UpdateNFHistBuff(AH5416(ah)->ah_cal.nfCalHist, nfarray); 705 ichan->rawNoiseFloor = nf; 706 } 707 return nf; 708} 709