ar5416_cal.c revision 186333
1/* 2 * Copyright (c) 2002-2008 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 * $Id: ar5416_cal.c,v 1.7 2008/11/11 17:43:23 sam Exp $ 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, HAL_CHANNEL_INTERNAL *); 36static int16_t ar5416GetNf(struct ath_hal *, HAL_CHANNEL_INTERNAL *); 37 38/* 39 * Determine if calibration is supported by device and channel flags 40 */ 41static OS_INLINE HAL_BOOL 42ar5416IsCalSupp(struct ath_hal *ah, HAL_CHANNEL *chan, HAL_CAL_TYPE calType) 43{ 44 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 45 46 switch (calType & cal->suppCals) { 47 case IQ_MISMATCH_CAL: 48 /* Run IQ Mismatch for non-CCK only */ 49 return !IS_CHAN_B(chan); 50 case ADC_GAIN_CAL: 51 case ADC_DC_CAL: 52 /* Run ADC Gain Cal for non-CCK & non 2GHz-HT20 only */ 53 return !IS_CHAN_B(chan) && 54 !(IS_CHAN_2GHZ(chan) && IS_CHAN_HT20(chan)); 55 } 56 return AH_FALSE; 57} 58 59/* 60 * Setup HW to collect samples used for current cal 61 */ 62static void 63ar5416SetupMeasurement(struct ath_hal *ah, HAL_CAL_LIST *currCal) 64{ 65 /* Start calibration w/ 2^(INIT_IQCAL_LOG_COUNT_MAX+1) samples */ 66 OS_REG_RMW_FIELD(ah, AR_PHY_TIMING_CTRL4, 67 AR_PHY_TIMING_CTRL4_IQCAL_LOG_COUNT_MAX, 68 currCal->calData->calCountMax); 69 70 /* Select calibration to run */ 71 switch (currCal->calData->calType) { 72 case IQ_MISMATCH_CAL: 73 OS_REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_IQ); 74 HALDEBUG(ah, HAL_DEBUG_PERCAL, 75 "%s: start IQ Mismatch calibration\n", __func__); 76 break; 77 case ADC_GAIN_CAL: 78 OS_REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_ADC_GAIN); 79 HALDEBUG(ah, HAL_DEBUG_PERCAL, 80 "%s: start ADC Gain calibration\n", __func__); 81 break; 82 case ADC_DC_CAL: 83 OS_REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_ADC_DC_PER); 84 HALDEBUG(ah, HAL_DEBUG_PERCAL, 85 "%s: start ADC DC calibration\n", __func__); 86 break; 87 case ADC_DC_INIT_CAL: 88 OS_REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_ADC_DC_INIT); 89 HALDEBUG(ah, HAL_DEBUG_PERCAL, 90 "%s: start Init ADC DC calibration\n", __func__); 91 break; 92 } 93 /* Kick-off cal */ 94 OS_REG_SET_BIT(ah, AR_PHY_TIMING_CTRL4, AR_PHY_TIMING_CTRL4_DO_CAL); 95} 96 97/* 98 * Initialize shared data structures and prepare a cal to be run. 99 */ 100static void 101ar5416ResetMeasurement(struct ath_hal *ah, HAL_CAL_LIST *currCal) 102{ 103 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 104 105 /* Reset data structures shared between different calibrations */ 106 OS_MEMZERO(cal->caldata, sizeof(cal->caldata)); 107 cal->calSamples = 0; 108 109 /* Setup HW for new calibration */ 110 ar5416SetupMeasurement(ah, currCal); 111 112 /* Change SW state to RUNNING for this calibration */ 113 currCal->calState = CAL_RUNNING; 114} 115 116#if 0 117/* 118 * Run non-periodic calibrations. 119 */ 120static HAL_BOOL 121ar5416RunInitCals(struct ath_hal *ah, int init_cal_count) 122{ 123 struct ath_hal_5416 *ahp = AH5416(ah); 124 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 125 HAL_CHANNEL_INTERNAL ichan; /* XXX bogus */ 126 HAL_CAL_LIST *curCal = ahp->ah_cal_curr; 127 HAL_BOOL isCalDone; 128 int i; 129 130 if (curCal == AH_NULL) 131 return AH_FALSE; 132 133 ichan.calValid = 0; 134 for (i = 0; i < init_cal_count; i++) { 135 /* Reset this Cal */ 136 ar5416ResetMeasurement(ah, curCal); 137 /* Poll for offset calibration complete */ 138 if (!ath_hal_wait(ah, AR_PHY_TIMING_CTRL4, AR_PHY_TIMING_CTRL4_DO_CAL, 0)) { 139 HALDEBUG(ah, HAL_DEBUG_ANY, 140 "%s: Cal %d failed to finish in 100ms.\n", 141 __func__, curCal->calData->calType); 142 /* Re-initialize list pointers for periodic cals */ 143 cal->cal_list = cal->cal_last = cal->cal_curr = AH_NULL; 144 return AH_FALSE; 145 } 146 /* Run this cal */ 147 ar5416DoCalibration(ah, &ichan, ahp->ah_rxchainmask, 148 curCal, &isCalDone); 149 if (!isCalDone) 150 HALDEBUG(ah, HAL_DEBUG_ANY, 151 "%s: init cal %d did not complete.\n", 152 __func__, curCal->calData->calType); 153 if (curCal->calNext != AH_NULL) 154 curCal = curCal->calNext; 155 } 156 157 /* Re-initialize list pointers for periodic cals */ 158 cal->cal_list = cal->cal_last = cal->cal_curr = AH_NULL; 159 return AH_TRUE; 160} 161#endif 162 163/* 164 * Initialize Calibration infrastructure. 165 */ 166HAL_BOOL 167ar5416InitCal(struct ath_hal *ah, HAL_CHANNEL *chan) 168{ 169 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 170 HAL_CHANNEL_INTERNAL *ichan; 171 172 ichan = ath_hal_checkchannel(ah, chan); 173 HALASSERT(ichan != AH_NULL); 174 175 if (AR_SREV_MERLIN_10_OR_LATER(ah)) { 176 /* Enable Rx Filter Cal */ 177 OS_REG_CLR_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC); 178 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, 179 AR_PHY_AGC_CONTROL_FLTR_CAL); 180 181 /* Clear the carrier leak cal bit */ 182 OS_REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE); 183 184 /* kick off the cal */ 185 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL); 186 187 /* Poll for offset calibration complete */ 188 if (!ath_hal_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL, 0)) { 189 HALDEBUG(ah, HAL_DEBUG_ANY, 190 "%s: offset calibration failed to complete in 1ms; " 191 "noisy environment?\n", __func__); 192 return AH_FALSE; 193 } 194 195 /* Set the cl cal bit and rerun the cal a 2nd time */ 196 /* Enable Rx Filter Cal */ 197 OS_REG_CLR_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC); 198 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, 199 AR_PHY_AGC_CONTROL_FLTR_CAL); 200 201 OS_REG_SET_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE); 202 } 203 204 /* Calibrate the AGC */ 205 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL); 206 207 /* Poll for offset calibration complete */ 208 if (!ath_hal_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL, 0)) { 209 HALDEBUG(ah, HAL_DEBUG_ANY, 210 "%s: offset calibration did not complete in 1ms; " 211 "noisy environment?\n", __func__); 212 return AH_FALSE; 213 } 214 215 /* 216 * Do NF calibration after DC offset and other CALs. 217 * Per system engineers, noise floor value can sometimes be 20 dB 218 * higher than normal value if DC offset and noise floor cal are 219 * triggered at the same time. 220 */ 221 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF); 222 223 /* Initialize list pointers */ 224 cal->cal_list = cal->cal_last = cal->cal_curr = AH_NULL; 225 226 /* 227 * Enable IQ, ADC Gain, ADC DC Offset Cals 228 */ 229 if (AR_SREV_SOWL_10_OR_LATER(ah)) { 230 /* Setup all non-periodic, init time only calibrations */ 231 /* XXX: Init DC Offset not working yet */ 232#if 0 233 if (ar5416IsCalSupp(ah, chan, ADC_DC_INIT_CAL)) { 234 INIT_CAL(&cal->adcDcCalInitData); 235 INSERT_CAL(cal, &cal->adcDcCalInitData); 236 } 237 /* Initialize current pointer to first element in list */ 238 cal->cal_curr = cal->cal_list; 239 240 if (cal->ah_cal_curr != AH_NULL && !ar5416RunInitCals(ah, 0)) 241 return AH_FALSE; 242#endif 243 } 244 245 /* If Cals are supported, add them to list via INIT/INSERT_CAL */ 246 if (ar5416IsCalSupp(ah, chan, ADC_GAIN_CAL)) { 247 INIT_CAL(&cal->adcGainCalData); 248 INSERT_CAL(cal, &cal->adcGainCalData); 249 HALDEBUG(ah, HAL_DEBUG_PERCAL, 250 "%s: enable ADC Gain Calibration.\n", __func__); 251 } 252 if (ar5416IsCalSupp(ah, chan, ADC_DC_CAL)) { 253 INIT_CAL(&cal->adcDcCalData); 254 INSERT_CAL(cal, &cal->adcDcCalData); 255 HALDEBUG(ah, HAL_DEBUG_PERCAL, 256 "%s: enable ADC DC Calibration.\n", __func__); 257 } 258 if (ar5416IsCalSupp(ah, chan, IQ_MISMATCH_CAL)) { 259 INIT_CAL(&cal->iqCalData); 260 INSERT_CAL(cal, &cal->iqCalData); 261 HALDEBUG(ah, HAL_DEBUG_PERCAL, 262 "%s: enable IQ Calibration.\n", __func__); 263 } 264 /* Initialize current pointer to first element in list */ 265 cal->cal_curr = cal->cal_list; 266 267 /* Kick off measurements for the first cal */ 268 if (cal->cal_curr != AH_NULL) 269 ar5416ResetMeasurement(ah, cal->cal_curr); 270 271 /* Mark all calibrations on this channel as being invalid */ 272 ichan->calValid = 0; 273 274 return AH_TRUE; 275} 276 277/* 278 * Entry point for upper layers to restart current cal. 279 * Reset the calibration valid bit in channel. 280 */ 281HAL_BOOL 282ar5416ResetCalValid(struct ath_hal *ah, HAL_CHANNEL *chan) 283{ 284 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 285 HAL_CHANNEL_INTERNAL *ichan = ath_hal_checkchannel(ah, chan); 286 HAL_CAL_LIST *currCal = cal->cal_curr; 287 288 if (!AR_SREV_SOWL_10_OR_LATER(ah)) 289 return AH_FALSE; 290 if (currCal == AH_NULL) 291 return AH_FALSE; 292 if (ichan == AH_NULL) { 293 HALDEBUG(ah, HAL_DEBUG_ANY, 294 "%s: invalid channel %u/0x%x; no mapping\n", 295 __func__, chan->channel, chan->channelFlags); 296 return AH_FALSE; 297 } 298 /* 299 * Expected that this calibration has run before, post-reset. 300 * Current state should be done 301 */ 302 if (currCal->calState != CAL_DONE) { 303 HALDEBUG(ah, HAL_DEBUG_ANY, 304 "%s: Calibration state incorrect, %d\n", 305 __func__, currCal->calState); 306 return AH_FALSE; 307 } 308 309 /* Verify Cal is supported on this channel */ 310 if (!ar5416IsCalSupp(ah, chan, currCal->calData->calType)) 311 return AH_FALSE; 312 313 HALDEBUG(ah, HAL_DEBUG_PERCAL, 314 "%s: Resetting Cal %d state for channel %u/0x%x\n", 315 __func__, currCal->calData->calType, chan->channel, 316 chan->channelFlags); 317 318 /* Disable cal validity in channel */ 319 ichan->calValid &= ~currCal->calData->calType; 320 currCal->calState = CAL_WAITING; 321 322 return AH_TRUE; 323} 324 325/* 326 * Recalibrate the lower PHY chips to account for temperature/environment 327 * changes. 328 */ 329static void 330ar5416DoCalibration(struct ath_hal *ah, HAL_CHANNEL_INTERNAL *ichan, 331 uint8_t rxchainmask, HAL_CAL_LIST *currCal, HAL_BOOL *isCalDone) 332{ 333 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 334 335 /* Cal is assumed not done until explicitly set below */ 336 *isCalDone = AH_FALSE; 337 338 HALDEBUG(ah, HAL_DEBUG_PERCAL, 339 "%s: %s Calibration, state %d, calValid 0x%x\n", 340 __func__, currCal->calData->calName, currCal->calState, 341 ichan->calValid); 342 343 /* Calibration in progress. */ 344 if (currCal->calState == CAL_RUNNING) { 345 /* Check to see if it has finished. */ 346 if (!(OS_REG_READ(ah, AR_PHY_TIMING_CTRL4) & AR_PHY_TIMING_CTRL4_DO_CAL)) { 347 HALDEBUG(ah, HAL_DEBUG_PERCAL, 348 "%s: sample %d of %d finished\n", 349 __func__, cal->calSamples, 350 currCal->calData->calNumSamples); 351 /* 352 * Collect measurements for active chains. 353 */ 354 currCal->calData->calCollect(ah); 355 if (++cal->calSamples >= currCal->calData->calNumSamples) { 356 int i, numChains = 0; 357 for (i = 0; i < AR5416_MAX_CHAINS; i++) { 358 if (rxchainmask & (1 << i)) 359 numChains++; 360 } 361 /* 362 * Process accumulated data 363 */ 364 currCal->calData->calPostProc(ah, numChains); 365 366 /* Calibration has finished. */ 367 ichan->calValid |= currCal->calData->calType; 368 currCal->calState = CAL_DONE; 369 *isCalDone = AH_TRUE; 370 } else { 371 /* 372 * Set-up to collect of another sub-sample. 373 */ 374 ar5416SetupMeasurement(ah, currCal); 375 } 376 } 377 } else if (!(ichan->calValid & currCal->calData->calType)) { 378 /* If current cal is marked invalid in channel, kick it off */ 379 ar5416ResetMeasurement(ah, currCal); 380 } 381} 382 383/* 384 * Internal interface to schedule periodic calibration work. 385 */ 386HAL_BOOL 387ar5416PerCalibrationN(struct ath_hal *ah, HAL_CHANNEL *chan, 388 u_int rxchainmask, HAL_BOOL longcal, HAL_BOOL *isCalDone) 389{ 390 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 391 HAL_CAL_LIST *currCal = cal->cal_curr; 392 HAL_CHANNEL_INTERNAL *ichan; 393 394 OS_MARK(ah, AH_MARK_PERCAL, chan->channel); 395 396 *isCalDone = AH_TRUE; 397 398 /* Invalid channel check */ 399 ichan = ath_hal_checkchannel(ah, chan); 400 if (ichan == AH_NULL) { 401 HALDEBUG(ah, HAL_DEBUG_ANY, 402 "%s: invalid channel %u/0x%x; no mapping\n", 403 __func__, chan->channel, chan->channelFlags); 404 return AH_FALSE; 405 } 406 407 /* 408 * For given calibration: 409 * 1. Call generic cal routine 410 * 2. When this cal is done (isCalDone) if we have more cals waiting 411 * (eg after reset), mask this to upper layers by not propagating 412 * isCalDone if it is set to TRUE. 413 * Instead, change isCalDone to FALSE and setup the waiting cal(s) 414 * to be run. 415 */ 416 if (currCal != AH_NULL && 417 (currCal->calState == CAL_RUNNING || 418 currCal->calState == CAL_WAITING)) { 419 ar5416DoCalibration(ah, ichan, rxchainmask, currCal, isCalDone); 420 if (*isCalDone == AH_TRUE) { 421 cal->cal_curr = currCal = currCal->calNext; 422 if (currCal->calState == CAL_WAITING) { 423 *isCalDone = AH_FALSE; 424 ar5416ResetMeasurement(ah, currCal); 425 } 426 } 427 } 428 429 /* Do NF cal only at longer intervals */ 430 if (longcal) { 431 /* 432 * Get the value from the previous NF cal 433 * and update the history buffer. 434 */ 435 ar5416GetNf(ah, ichan); 436 437 /* 438 * Load the NF from history buffer of the current channel. 439 * NF is slow time-variant, so it is OK to use a 440 * historical value. 441 */ 442 ar5416LoadNF(ah, AH_PRIVATE(ah)->ah_curchan); 443 444 /* start NF calibration, without updating BB NF register*/ 445 ar5416StartNFCal(ah); 446 447 if ((ichan->channelFlags & CHANNEL_CW_INT) != 0) { 448 /* report up and clear internal state */ 449 chan->channelFlags |= CHANNEL_CW_INT; 450 ichan->channelFlags &= ~CHANNEL_CW_INT; 451 } 452 } 453 return AH_TRUE; 454} 455 456/* 457 * Recalibrate the lower PHY chips to account for temperature/environment 458 * changes. 459 */ 460HAL_BOOL 461ar5416PerCalibration(struct ath_hal *ah, HAL_CHANNEL *chan, HAL_BOOL *isIQdone) 462{ 463 struct ath_hal_5416 *ahp = AH5416(ah); 464 struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; 465 HAL_CAL_LIST *curCal = cal->cal_curr; 466 467 if (curCal != AH_NULL && curCal->calData->calType == IQ_MISMATCH_CAL) { 468 return ar5416PerCalibrationN(ah, chan, ahp->ah_rx_chainmask, 469 AH_TRUE, isIQdone); 470 } else { 471 HAL_BOOL isCalDone; 472 473 *isIQdone = AH_FALSE; 474 return ar5416PerCalibrationN(ah, chan, ahp->ah_rx_chainmask, 475 AH_TRUE, &isCalDone); 476 } 477} 478 479static HAL_BOOL 480ar5416GetEepromNoiseFloorThresh(struct ath_hal *ah, 481 const HAL_CHANNEL_INTERNAL *chan, int16_t *nft) 482{ 483 switch (chan->channelFlags & CHANNEL_ALL_NOTURBO) { 484 case CHANNEL_A: 485 case CHANNEL_A_HT20: 486 case CHANNEL_A_HT40PLUS: 487 case CHANNEL_A_HT40MINUS: 488 ath_hal_eepromGet(ah, AR_EEP_NFTHRESH_5, nft); 489 break; 490 case CHANNEL_B: 491 case CHANNEL_G: 492 case CHANNEL_G_HT20: 493 case CHANNEL_G_HT40PLUS: 494 case CHANNEL_G_HT40MINUS: 495 ath_hal_eepromGet(ah, AR_EEP_NFTHRESH_2, nft); 496 break; 497 default: 498 HALDEBUG(ah, HAL_DEBUG_ANY, 499 "%s: invalid channel flags 0x%x\n", 500 __func__, chan->channelFlags); 501 return AH_FALSE; 502 } 503 return AH_TRUE; 504} 505 506static void 507ar5416StartNFCal(struct ath_hal *ah) 508{ 509 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_ENABLE_NF); 510 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NO_UPDATE_NF); 511 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF); 512} 513 514static void 515ar5416LoadNF(struct ath_hal *ah, HAL_CHANNEL_INTERNAL *chan) 516{ 517 static const uint32_t ar5416_cca_regs[] = { 518 AR_PHY_CCA, 519 AR_PHY_CH1_CCA, 520 AR_PHY_CH2_CCA, 521 AR_PHY_EXT_CCA, 522 AR_PHY_CH1_EXT_CCA, 523 AR_PHY_CH2_EXT_CCA 524 }; 525 struct ar5212NfCalHist *h; 526 int i, j; 527 int32_t val; 528 uint8_t chainmask; 529 530 /* 531 * Force NF calibration for all chains. 532 */ 533 if (AR_SREV_KITE(ah)) { 534 /* Kite has only one chain */ 535 chainmask = 0x9; 536 } else if (AR_SREV_MERLIN(ah)) { 537 /* Merlin has only two chains */ 538 chainmask = 0x1B; 539 } else { 540 chainmask = 0x3F; 541 } 542 543 /* 544 * Write filtered NF values into maxCCApwr register parameter 545 * so we can load below. 546 */ 547 h = AH5416(ah)->ah_cal.nfCalHist; 548 for (i = 0; i < AR5416_NUM_NF_READINGS; i ++) 549 if (chainmask & (1 << i)) { 550 val = OS_REG_READ(ah, ar5416_cca_regs[i]); 551 val &= 0xFFFFFE00; 552 val |= (((uint32_t)(h[i].privNF) << 1) & 0x1ff); 553 OS_REG_WRITE(ah, ar5416_cca_regs[i], val); 554 } 555 556 /* Load software filtered NF value into baseband internal minCCApwr variable. */ 557 OS_REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_ENABLE_NF); 558 OS_REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NO_UPDATE_NF); 559 OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF); 560 561 /* Wait for load to complete, should be fast, a few 10s of us. */ 562 for (j = 0; j < 1000; j++) { 563 if ((OS_REG_READ(ah, AR_PHY_AGC_CONTROL) & AR_PHY_AGC_CONTROL_NF) == 0) 564 break; 565 OS_DELAY(10); 566 } 567 568 /* 569 * Restore maxCCAPower register parameter again so that we're not capped 570 * by the median we just loaded. This will be initial (and max) value 571 * of next noise floor calibration the baseband does. 572 */ 573 for (i = 0; i < AR5416_NUM_NF_READINGS; i ++) 574 if (chainmask & (1 << i)) { 575 val = OS_REG_READ(ah, ar5416_cca_regs[i]); 576 val &= 0xFFFFFE00; 577 val |= (((uint32_t)(-50) << 1) & 0x1ff); 578 OS_REG_WRITE(ah, ar5416_cca_regs[i], val); 579 } 580} 581 582void 583ar5416InitNfHistBuff(struct ar5212NfCalHist *h) 584{ 585 int i, j; 586 587 for (i = 0; i < AR5416_NUM_NF_READINGS; i ++) { 588 h[i].currIndex = 0; 589 h[i].privNF = AR5416_CCA_MAX_GOOD_VALUE; 590 h[i].invalidNFcount = AR512_NF_CAL_HIST_MAX; 591 for (j = 0; j < AR512_NF_CAL_HIST_MAX; j ++) 592 h[i].nfCalBuffer[j] = AR5416_CCA_MAX_GOOD_VALUE; 593 } 594} 595 596/* 597 * Update the noise floor buffer as a ring buffer 598 */ 599static void 600ar5416UpdateNFHistBuff(struct ar5212NfCalHist *h, int16_t *nfarray) 601{ 602 int i; 603 604 for (i = 0; i < AR5416_NUM_NF_READINGS; i ++) { 605 h[i].nfCalBuffer[h[i].currIndex] = nfarray[i]; 606 607 if (++h[i].currIndex >= AR512_NF_CAL_HIST_MAX) 608 h[i].currIndex = 0; 609 if (h[i].invalidNFcount > 0) { 610 if (nfarray[i] < AR5416_CCA_MIN_BAD_VALUE || 611 nfarray[i] > AR5416_CCA_MAX_HIGH_VALUE) { 612 h[i].invalidNFcount = AR512_NF_CAL_HIST_MAX; 613 } else { 614 h[i].invalidNFcount--; 615 h[i].privNF = nfarray[i]; 616 } 617 } else { 618 h[i].privNF = ar5212GetNfHistMid(h[i].nfCalBuffer); 619 } 620 } 621} 622 623/* 624 * Read the NF and check it against the noise floor threshhold 625 */ 626static int16_t 627ar5416GetNf(struct ath_hal *ah, HAL_CHANNEL_INTERNAL *chan) 628{ 629 int16_t nf, nfThresh; 630 631 if (OS_REG_READ(ah, AR_PHY_AGC_CONTROL) & AR_PHY_AGC_CONTROL_NF) { 632 HALDEBUG(ah, HAL_DEBUG_ANY, 633 "%s: NF didn't complete in calibration window\n", __func__); 634 nf = 0; 635 } else { 636 /* Finished NF cal, check against threshold */ 637 int16_t nfarray[NUM_NOISEFLOOR_READINGS] = { 0 }; 638 639 /* TODO - enhance for multiple chains and ext ch */ 640 ath_hal_getNoiseFloor(ah, nfarray); 641 nf = nfarray[0]; 642 if (ar5416GetEepromNoiseFloorThresh(ah, chan, &nfThresh)) { 643 if (nf > nfThresh) { 644 HALDEBUG(ah, HAL_DEBUG_ANY, 645 "%s: noise floor failed detected; " 646 "detected %d, threshold %d\n", __func__, 647 nf, nfThresh); 648 /* 649 * NB: Don't discriminate 2.4 vs 5Ghz, if this 650 * happens it indicates a problem regardless 651 * of the band. 652 */ 653 chan->channelFlags |= CHANNEL_CW_INT; 654 nf = 0; 655 } 656 } else { 657 nf = 0; 658 } 659 ar5416UpdateNFHistBuff(AH5416(ah)->ah_cal.nfCalHist, nfarray); 660 chan->rawNoiseFloor = nf; 661 } 662 return nf; 663} 664