2 * Copyright (c) 2010-2011 Atheros Communications Inc.
4 * Modified for iPXE by Scott K Logan <logans@cottsay.net> July 2011
5 * Original from Linux kernel 3.0.1
7 * Permission to use, copy, modify, and/or distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
24 #include "ar9003_phy.h"
26 #define MAX_MEASUREMENT 8
27 #define MAX_MAG_DELTA 11
28 #define MAX_PHS_DELTA 10
31 int mag_coeff[AR9300_MAX_CHAINS][MAX_MEASUREMENT];
32 int phs_coeff[AR9300_MAX_CHAINS][MAX_MEASUREMENT];
36 enum ar9003_cal_types {
37 IQ_MISMATCH_CAL = BIT(0),
38 TEMP_COMP_CAL = BIT(1),
41 static void ar9003_hw_setup_calibration(struct ath_hw *ah,
42 struct ath9k_cal_list *currCal)
44 /* Select calibration to run */
45 switch (currCal->calData->calType) {
48 * Start calibration with
49 * 2^(INIT_IQCAL_LOG_COUNT_MAX+1) samples
51 REG_RMW_FIELD(ah, AR_PHY_TIMING4,
52 AR_PHY_TIMING4_IQCAL_LOG_COUNT_MAX,
53 currCal->calData->calCountMax);
54 REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_IQ);
57 "starting IQ Mismatch Calibration\n");
60 REG_SET_BIT(ah, AR_PHY_TIMING4, AR_PHY_TIMING4_DO_CAL);
63 REG_RMW_FIELD(ah, AR_PHY_65NM_CH0_THERM,
64 AR_PHY_65NM_CH0_THERM_LOCAL, 1);
65 REG_RMW_FIELD(ah, AR_PHY_65NM_CH0_THERM,
66 AR_PHY_65NM_CH0_THERM_START, 1);
69 "starting Temperature Compensation Calibration\n");
75 * Generic calibration routine.
76 * Recalibrate the lower PHY chips to account for temperature/environment
79 static int ar9003_hw_per_calibration(struct ath_hw *ah,
80 struct ath9k_channel *ichan __unused,
82 struct ath9k_cal_list *currCal)
84 struct ath9k_hw_cal_data *caldata = ah->caldata;
85 /* Cal is assumed not done until explicitly set below */
88 /* Calibration in progress. */
89 if (currCal->calState == CAL_RUNNING) {
90 /* Check to see if it has finished. */
91 if (!(REG_READ(ah, AR_PHY_TIMING4) & AR_PHY_TIMING4_DO_CAL)) {
93 * Accumulate cal measures for active chains
95 currCal->calData->calCollect(ah);
98 if (ah->cal_samples >=
99 currCal->calData->calNumSamples) {
100 unsigned int i, numChains = 0;
101 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
102 if (rxchainmask & (1 << i))
107 * Process accumulated data
109 currCal->calData->calPostProc(ah, numChains);
111 /* Calibration has finished. */
112 caldata->CalValid |= currCal->calData->calType;
113 currCal->calState = CAL_DONE;
117 * Set-up collection of another sub-sample until we
120 ar9003_hw_setup_calibration(ah, currCal);
123 } else if (!(caldata->CalValid & currCal->calData->calType)) {
124 /* If current cal is marked invalid in channel, kick it off */
125 ath9k_hw_reset_calibration(ah, currCal);
131 static int ar9003_hw_calibrate(struct ath_hw *ah,
132 struct ath9k_channel *chan,
137 struct ath9k_cal_list *currCal = ah->cal_list_curr;
140 * For given calibration:
141 * 1. Call generic cal routine
142 * 2. When this cal is done (isCalDone) if we have more cals waiting
143 * (eg after reset), mask this to upper layers by not propagating
144 * isCalDone if it is set to TRUE.
145 * Instead, change isCalDone to FALSE and setup the waiting cal(s)
149 (currCal->calState == CAL_RUNNING ||
150 currCal->calState == CAL_WAITING)) {
151 iscaldone = ar9003_hw_per_calibration(ah, chan,
152 rxchainmask, currCal);
154 ah->cal_list_curr = currCal = currCal->calNext;
156 if (currCal->calState == CAL_WAITING) {
158 ath9k_hw_reset_calibration(ah, currCal);
163 /* Do NF cal only at longer intervals */
166 * Get the value from the previous NF cal and update
169 ath9k_hw_getnf(ah, chan);
172 * Load the NF from history buffer of the current channel.
173 * NF is slow time-variant, so it is OK to use a historical
176 ath9k_hw_loadnf(ah, ah->curchan);
178 /* start NF calibration, without updating BB NF register */
179 ath9k_hw_start_nfcal(ah, 0);
185 static void ar9003_hw_iqcal_collect(struct ath_hw *ah)
189 /* Accumulate IQ cal measures for active chains */
190 for (i = 0; i < AR5416_MAX_CHAINS; i++) {
191 if (ah->txchainmask & BIT(i)) {
192 ah->totalPowerMeasI[i] +=
193 REG_READ(ah, AR_PHY_CAL_MEAS_0(i));
194 ah->totalPowerMeasQ[i] +=
195 REG_READ(ah, AR_PHY_CAL_MEAS_1(i));
196 ah->totalIqCorrMeas[i] +=
197 (int32_t) REG_READ(ah, AR_PHY_CAL_MEAS_2(i));
199 "%d: Chn %d pmi=0x%08x;pmq=0x%08x;iqcm=0x%08x;\n",
200 ah->cal_samples, i, ah->totalPowerMeasI[i],
201 ah->totalPowerMeasQ[i],
202 ah->totalIqCorrMeas[i]);
207 static void ar9003_hw_iqcalibrate(struct ath_hw *ah, u8 numChains)
209 u32 powerMeasQ, powerMeasI, iqCorrMeas;
210 u32 qCoffDenom, iCoffDenom;
211 int32_t qCoff, iCoff;
213 static const uint32_t offset_array[3] = {
214 AR_PHY_RX_IQCAL_CORR_B0,
215 AR_PHY_RX_IQCAL_CORR_B1,
216 AR_PHY_RX_IQCAL_CORR_B2,
219 for (i = 0; i < numChains; i++) {
220 powerMeasI = ah->totalPowerMeasI[i];
221 powerMeasQ = ah->totalPowerMeasQ[i];
222 iqCorrMeas = ah->totalIqCorrMeas[i];
225 "Starting IQ Cal and Correction for Chain %d\n",
229 "Orignal: Chn %diq_corr_meas = 0x%08x\n",
230 i, ah->totalIqCorrMeas[i]);
234 if (iqCorrMeas > 0x80000000) {
235 iqCorrMeas = (0xffffffff - iqCorrMeas) + 1;
240 "Chn %d pwr_meas_i = 0x%08x\n", i, powerMeasI);
242 "Chn %d pwr_meas_q = 0x%08x\n", i, powerMeasQ);
243 DBG2("ath9k: iqCorrNeg is 0x%08x\n",
246 iCoffDenom = (powerMeasI / 2 + powerMeasQ / 2) / 256;
247 qCoffDenom = powerMeasQ / 64;
249 if ((iCoffDenom != 0) && (qCoffDenom != 0)) {
250 iCoff = iqCorrMeas / iCoffDenom;
251 qCoff = powerMeasI / qCoffDenom - 64;
253 "Chn %d iCoff = 0x%08x\n", i, iCoff);
255 "Chn %d qCoff = 0x%08x\n", i, qCoff);
257 /* Force bounds on iCoff */
260 else if (iCoff <= -63)
263 /* Negate iCoff if iqCorrNeg == 0 */
264 if (iqCorrNeg == 0x0)
267 /* Force bounds on qCoff */
270 else if (qCoff <= -63)
273 iCoff = iCoff & 0x7f;
274 qCoff = qCoff & 0x7f;
277 "Chn %d : iCoff = 0x%x qCoff = 0x%x\n",
280 "Register offset (0x%04x) before update = 0x%x\n",
282 REG_READ(ah, offset_array[i]));
284 REG_RMW_FIELD(ah, offset_array[i],
285 AR_PHY_RX_IQCAL_CORR_IQCORR_Q_I_COFF,
287 REG_RMW_FIELD(ah, offset_array[i],
288 AR_PHY_RX_IQCAL_CORR_IQCORR_Q_Q_COFF,
291 "Register offset (0x%04x) QI COFF (bitfields 0x%08x) after update = 0x%x\n",
293 AR_PHY_RX_IQCAL_CORR_IQCORR_Q_I_COFF,
294 REG_READ(ah, offset_array[i]));
296 "Register offset (0x%04x) QQ COFF (bitfields 0x%08x) after update = 0x%x\n",
298 AR_PHY_RX_IQCAL_CORR_IQCORR_Q_Q_COFF,
299 REG_READ(ah, offset_array[i]));
302 "IQ Cal and Correction done for Chain %d\n", i);
306 REG_SET_BIT(ah, AR_PHY_RX_IQCAL_CORR_B0,
307 AR_PHY_RX_IQCAL_CORR_IQCORR_ENABLE);
309 "IQ Cal and Correction (offset 0x%04x) enabled (bit position 0x%08x). New Value 0x%08x\n",
310 (unsigned) (AR_PHY_RX_IQCAL_CORR_B0),
311 AR_PHY_RX_IQCAL_CORR_IQCORR_ENABLE,
312 REG_READ(ah, AR_PHY_RX_IQCAL_CORR_B0));
315 static const struct ath9k_percal_data iq_cal_single_sample = {
319 ar9003_hw_iqcal_collect,
320 ar9003_hw_iqcalibrate
323 static void ar9003_hw_init_cal_settings(struct ath_hw *ah)
325 ah->iq_caldata.calData = &iq_cal_single_sample;
329 * solve 4x4 linear equation used in loopback iq cal.
331 static int ar9003_hw_solve_iq_cal(struct ath_hw *ah __unused,
342 s32 f1 = cos_2phi_1 - cos_2phi_2,
343 f3 = sin_2phi_1 - sin_2phi_2,
345 s32 mag_tx, phs_tx, mag_rx, phs_rx;
346 const s32 result_shift = 1 << 15;
348 f2 = (f1 * f1 + f3 * f3) / result_shift;
351 DBG("ath9k: Divide by 0\n");
355 /* mag mismatch, tx */
356 mag_tx = f1 * (mag_a0_d0 - mag_a1_d0) + f3 * (phs_a0_d0 - phs_a1_d0);
357 /* phs mismatch, tx */
358 phs_tx = f3 * (-mag_a0_d0 + mag_a1_d0) + f1 * (phs_a0_d0 - phs_a1_d0);
360 mag_tx = (mag_tx / f2);
361 phs_tx = (phs_tx / f2);
363 /* mag mismatch, rx */
364 mag_rx = mag_a0_d0 - (cos_2phi_1 * mag_tx + sin_2phi_1 * phs_tx) /
366 /* phs mismatch, rx */
367 phs_rx = phs_a0_d0 + (sin_2phi_1 * mag_tx - cos_2phi_1 * phs_tx) /
370 solved_eq[0] = mag_tx;
371 solved_eq[1] = phs_tx;
372 solved_eq[2] = mag_rx;
373 solved_eq[3] = phs_rx;
378 static s32 ar9003_hw_find_mag_approx(struct ath_hw *ah __unused, s32 in_re, s32 in_im)
380 s32 abs_i = abs(in_re),
392 return max_abs - (max_abs / 32) + (min_abs / 8) + (min_abs / 4);
397 static int ar9003_hw_calc_iq_corr(struct ath_hw *ah,
402 s32 i2_m_q2_a0_d0, i2_p_q2_a0_d0, iq_corr_a0_d0,
403 i2_m_q2_a0_d1, i2_p_q2_a0_d1, iq_corr_a0_d1,
404 i2_m_q2_a1_d0, i2_p_q2_a1_d0, iq_corr_a1_d0,
405 i2_m_q2_a1_d1, i2_p_q2_a1_d1, iq_corr_a1_d1;
406 s32 mag_a0_d0, mag_a1_d0, mag_a0_d1, mag_a1_d1,
407 phs_a0_d0, phs_a1_d0, phs_a0_d1, phs_a1_d1,
408 sin_2phi_1, cos_2phi_1,
409 sin_2phi_2, cos_2phi_2;
410 s32 mag_tx, phs_tx, mag_rx, phs_rx;
411 s32 solved_eq[4], mag_corr_tx, phs_corr_tx, mag_corr_rx, phs_corr_rx,
413 const s32 res_scale = 1 << 15;
414 const s32 delpt_shift = 1 << 8;
417 i2_m_q2_a0_d0 = iq_res[0] & 0xfff;
418 i2_p_q2_a0_d0 = (iq_res[0] >> 12) & 0xfff;
419 iq_corr_a0_d0 = ((iq_res[0] >> 24) & 0xff) + ((iq_res[1] & 0xf) << 8);
421 if (i2_m_q2_a0_d0 > 0x800)
422 i2_m_q2_a0_d0 = -((0xfff - i2_m_q2_a0_d0) + 1);
424 if (i2_p_q2_a0_d0 > 0x800)
425 i2_p_q2_a0_d0 = -((0xfff - i2_p_q2_a0_d0) + 1);
427 if (iq_corr_a0_d0 > 0x800)
428 iq_corr_a0_d0 = -((0xfff - iq_corr_a0_d0) + 1);
430 i2_m_q2_a0_d1 = (iq_res[1] >> 4) & 0xfff;
431 i2_p_q2_a0_d1 = (iq_res[2] & 0xfff);
432 iq_corr_a0_d1 = (iq_res[2] >> 12) & 0xfff;
434 if (i2_m_q2_a0_d1 > 0x800)
435 i2_m_q2_a0_d1 = -((0xfff - i2_m_q2_a0_d1) + 1);
437 if (i2_p_q2_a0_d1 > 0x800)
438 i2_p_q2_a0_d1 = -((0xfff - i2_p_q2_a0_d1) + 1);
440 if (iq_corr_a0_d1 > 0x800)
441 iq_corr_a0_d1 = -((0xfff - iq_corr_a0_d1) + 1);
443 i2_m_q2_a1_d0 = ((iq_res[2] >> 24) & 0xff) + ((iq_res[3] & 0xf) << 8);
444 i2_p_q2_a1_d0 = (iq_res[3] >> 4) & 0xfff;
445 iq_corr_a1_d0 = iq_res[4] & 0xfff;
447 if (i2_m_q2_a1_d0 > 0x800)
448 i2_m_q2_a1_d0 = -((0xfff - i2_m_q2_a1_d0) + 1);
450 if (i2_p_q2_a1_d0 > 0x800)
451 i2_p_q2_a1_d0 = -((0xfff - i2_p_q2_a1_d0) + 1);
453 if (iq_corr_a1_d0 > 0x800)
454 iq_corr_a1_d0 = -((0xfff - iq_corr_a1_d0) + 1);
456 i2_m_q2_a1_d1 = (iq_res[4] >> 12) & 0xfff;
457 i2_p_q2_a1_d1 = ((iq_res[4] >> 24) & 0xff) + ((iq_res[5] & 0xf) << 8);
458 iq_corr_a1_d1 = (iq_res[5] >> 4) & 0xfff;
460 if (i2_m_q2_a1_d1 > 0x800)
461 i2_m_q2_a1_d1 = -((0xfff - i2_m_q2_a1_d1) + 1);
463 if (i2_p_q2_a1_d1 > 0x800)
464 i2_p_q2_a1_d1 = -((0xfff - i2_p_q2_a1_d1) + 1);
466 if (iq_corr_a1_d1 > 0x800)
467 iq_corr_a1_d1 = -((0xfff - iq_corr_a1_d1) + 1);
469 if ((i2_p_q2_a0_d0 == 0) || (i2_p_q2_a0_d1 == 0) ||
470 (i2_p_q2_a1_d0 == 0) || (i2_p_q2_a1_d1 == 0)) {
477 i2_p_q2_a0_d0, i2_p_q2_a0_d1,
478 i2_p_q2_a1_d0, i2_p_q2_a1_d1);
482 mag_a0_d0 = (i2_m_q2_a0_d0 * res_scale) / i2_p_q2_a0_d0;
483 phs_a0_d0 = (iq_corr_a0_d0 * res_scale) / i2_p_q2_a0_d0;
485 mag_a0_d1 = (i2_m_q2_a0_d1 * res_scale) / i2_p_q2_a0_d1;
486 phs_a0_d1 = (iq_corr_a0_d1 * res_scale) / i2_p_q2_a0_d1;
488 mag_a1_d0 = (i2_m_q2_a1_d0 * res_scale) / i2_p_q2_a1_d0;
489 phs_a1_d0 = (iq_corr_a1_d0 * res_scale) / i2_p_q2_a1_d0;
491 mag_a1_d1 = (i2_m_q2_a1_d1 * res_scale) / i2_p_q2_a1_d1;
492 phs_a1_d1 = (iq_corr_a1_d1 * res_scale) / i2_p_q2_a1_d1;
494 /* w/o analog phase shift */
495 sin_2phi_1 = (((mag_a0_d0 - mag_a0_d1) * delpt_shift) / DELPT);
496 /* w/o analog phase shift */
497 cos_2phi_1 = (((phs_a0_d1 - phs_a0_d0) * delpt_shift) / DELPT);
498 /* w/ analog phase shift */
499 sin_2phi_2 = (((mag_a1_d0 - mag_a1_d1) * delpt_shift) / DELPT);
500 /* w/ analog phase shift */
501 cos_2phi_2 = (((phs_a1_d1 - phs_a1_d0) * delpt_shift) / DELPT);
504 * force sin^2 + cos^2 = 1;
505 * find magnitude by approximation
507 mag1 = ar9003_hw_find_mag_approx(ah, cos_2phi_1, sin_2phi_1);
508 mag2 = ar9003_hw_find_mag_approx(ah, cos_2phi_2, sin_2phi_2);
510 if ((mag1 == 0) || (mag2 == 0)) {
512 "Divide by 0: mag1=%d, mag2=%d\n",
517 /* normalization sin and cos by mag */
518 sin_2phi_1 = (sin_2phi_1 * res_scale / mag1);
519 cos_2phi_1 = (cos_2phi_1 * res_scale / mag1);
520 sin_2phi_2 = (sin_2phi_2 * res_scale / mag2);
521 cos_2phi_2 = (cos_2phi_2 * res_scale / mag2);
523 /* calculate IQ mismatch */
524 if (!ar9003_hw_solve_iq_cal(ah,
525 sin_2phi_1, cos_2phi_1,
526 sin_2phi_2, cos_2phi_2,
527 mag_a0_d0, phs_a0_d0,
529 phs_a1_d0, solved_eq)) {
531 "Call to ar9003_hw_solve_iq_cal() failed.\n");
535 mag_tx = solved_eq[0];
536 phs_tx = solved_eq[1];
537 mag_rx = solved_eq[2];
538 phs_rx = solved_eq[3];
541 "chain %d: mag mismatch=%d phase mismatch=%d\n",
542 chain_idx, mag_tx/res_scale, phs_tx/res_scale);
544 if (res_scale == mag_tx) {
546 "Divide by 0: mag_tx=%d, res_scale=%d\n",
551 /* calculate and quantize Tx IQ correction factor */
552 mag_corr_tx = (mag_tx * res_scale) / (res_scale - mag_tx);
553 phs_corr_tx = -phs_tx;
555 q_q_coff = (mag_corr_tx * 128 / res_scale);
556 q_i_coff = (phs_corr_tx * 256 / res_scale);
559 "tx chain %d: mag corr=%d phase corr=%d\n",
560 chain_idx, q_q_coff, q_i_coff);
571 iqc_coeff[0] = (q_q_coff * 128) + q_i_coff;
574 "tx chain %d: iq corr coeff=%x\n",
575 chain_idx, iqc_coeff[0]);
577 if (-mag_rx == res_scale) {
579 "Divide by 0: mag_rx=%d, res_scale=%d\n",
584 /* calculate and quantize Rx IQ correction factors */
585 mag_corr_rx = (-mag_rx * res_scale) / (res_scale + mag_rx);
586 phs_corr_rx = -phs_rx;
588 q_q_coff = (mag_corr_rx * 128 / res_scale);
589 q_i_coff = (phs_corr_rx * 256 / res_scale);
592 "rx chain %d: mag corr=%d phase corr=%d\n",
593 chain_idx, q_q_coff, q_i_coff);
604 iqc_coeff[1] = (q_q_coff * 128) + q_i_coff;
607 "rx chain %d: iq corr coeff=%x\n",
608 chain_idx, iqc_coeff[1]);
613 static void ar9003_hw_detect_outlier(int *mp_coeff, int nmeasurement,
616 int mp_max = -64, max_idx = 0;
617 int mp_min = 63, min_idx = 0;
618 int mp_avg = 0, i, outlier_idx = 0;
620 /* find min/max mismatch across all calibrated gains */
621 for (i = 0; i < nmeasurement; i++) {
622 mp_avg += mp_coeff[i];
623 if (mp_coeff[i] > mp_max) {
624 mp_max = mp_coeff[i];
626 } else if (mp_coeff[i] < mp_min) {
627 mp_min = mp_coeff[i];
632 /* find average (exclude max abs value) */
633 for (i = 0; i < nmeasurement; i++) {
634 if ((abs(mp_coeff[i]) < abs(mp_max)) ||
635 (abs(mp_coeff[i]) < abs(mp_min)))
636 mp_avg += mp_coeff[i];
638 mp_avg /= (nmeasurement - 1);
641 if (abs(mp_max - mp_min) > max_delta) {
642 if (abs(mp_max - mp_avg) > abs(mp_min - mp_avg))
643 outlier_idx = max_idx;
645 outlier_idx = min_idx;
647 mp_coeff[outlier_idx] = mp_avg;
650 static void ar9003_hw_tx_iqcal_load_avg_2_passes(struct ath_hw *ah,
654 int i, im, nmeasurement;
655 u32 tx_corr_coeff[MAX_MEASUREMENT][AR9300_MAX_CHAINS];
657 memset(tx_corr_coeff, 0, sizeof(tx_corr_coeff));
658 for (i = 0; i < MAX_MEASUREMENT / 2; i++) {
659 tx_corr_coeff[i * 2][0] = tx_corr_coeff[(i * 2) + 1][0] =
660 AR_PHY_TX_IQCAL_CORR_COEFF_B0(i);
661 if (!AR_SREV_9485(ah)) {
662 tx_corr_coeff[i * 2][1] =
663 tx_corr_coeff[(i * 2) + 1][1] =
664 AR_PHY_TX_IQCAL_CORR_COEFF_B1(i);
666 tx_corr_coeff[i * 2][2] =
667 tx_corr_coeff[(i * 2) + 1][2] =
668 AR_PHY_TX_IQCAL_CORR_COEFF_B2(i);
672 /* Load the average of 2 passes */
673 for (i = 0; i < num_chains; i++) {
674 nmeasurement = REG_READ_FIELD(ah,
675 AR_PHY_TX_IQCAL_STATUS_B0,
676 AR_PHY_CALIBRATED_GAINS_0);
678 if (nmeasurement > MAX_MEASUREMENT)
679 nmeasurement = MAX_MEASUREMENT;
681 /* detect outlier only if nmeasurement > 1 */
682 if (nmeasurement > 1) {
683 /* Detect magnitude outlier */
684 ar9003_hw_detect_outlier(coeff->mag_coeff[i],
685 nmeasurement, MAX_MAG_DELTA);
687 /* Detect phase outlier */
688 ar9003_hw_detect_outlier(coeff->phs_coeff[i],
689 nmeasurement, MAX_PHS_DELTA);
692 for (im = 0; im < nmeasurement; im++) {
694 coeff->iqc_coeff[0] = (coeff->mag_coeff[i][im] & 0x7f) |
695 ((coeff->phs_coeff[i][im] & 0x7f) << 7);
698 REG_RMW_FIELD(ah, tx_corr_coeff[im][i],
699 AR_PHY_TX_IQCAL_CORR_COEFF_00_COEFF_TABLE,
700 coeff->iqc_coeff[0]);
702 REG_RMW_FIELD(ah, tx_corr_coeff[im][i],
703 AR_PHY_TX_IQCAL_CORR_COEFF_01_COEFF_TABLE,
704 coeff->iqc_coeff[0]);
708 REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_3,
709 AR_PHY_TX_IQCAL_CONTROL_3_IQCORR_EN, 0x1);
710 REG_RMW_FIELD(ah, AR_PHY_RX_IQCAL_CORR_B0,
711 AR_PHY_RX_IQCAL_CORR_B0_LOOPBACK_IQCORR_EN, 0x1);
717 static int ar9003_hw_tx_iq_cal_run(struct ath_hw *ah)
721 tx_gain_forced = REG_READ_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
722 AR_PHY_TXGAIN_FORCE);
724 REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
725 AR_PHY_TXGAIN_FORCE, 0);
727 REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_START,
728 AR_PHY_TX_IQCAL_START_DO_CAL, 1);
730 if (!ath9k_hw_wait(ah, AR_PHY_TX_IQCAL_START,
731 AR_PHY_TX_IQCAL_START_DO_CAL, 0,
734 "Tx IQ Cal is not completed.\n");
740 static void ar9003_hw_tx_iq_cal_post_proc(struct ath_hw *ah)
742 const u32 txiqcal_status[AR9300_MAX_CHAINS] = {
743 AR_PHY_TX_IQCAL_STATUS_B0,
744 AR_PHY_TX_IQCAL_STATUS_B1,
745 AR_PHY_TX_IQCAL_STATUS_B2,
747 const uint32_t chan_info_tab[] = {
748 AR_PHY_CHAN_INFO_TAB_0,
749 AR_PHY_CHAN_INFO_TAB_1,
750 AR_PHY_CHAN_INFO_TAB_2,
758 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
759 if (ah->txchainmask & (1 << i))
763 for (i = 0; i < num_chains; i++) {
764 nmeasurement = REG_READ_FIELD(ah,
765 AR_PHY_TX_IQCAL_STATUS_B0,
766 AR_PHY_CALIBRATED_GAINS_0);
767 if (nmeasurement > MAX_MEASUREMENT)
768 nmeasurement = MAX_MEASUREMENT;
770 for (im = 0; im < nmeasurement; im++) {
772 "Doing Tx IQ Cal for chain %d.\n", i);
774 if (REG_READ(ah, txiqcal_status[i]) &
775 AR_PHY_TX_IQCAL_STATUS_FAILED) {
777 "Tx IQ Cal failed for chain %d.\n", i);
781 for (j = 0; j < 3; j++) {
782 u32 idx = 2 * j, offset = 4 * (3 * im + j);
785 AR_PHY_CHAN_INFO_MEMORY,
786 AR_PHY_CHAN_INFO_TAB_S2_READ,
790 iq_res[idx] = REG_READ(ah,
795 AR_PHY_CHAN_INFO_MEMORY,
796 AR_PHY_CHAN_INFO_TAB_S2_READ,
800 iq_res[idx + 1] = 0xffff & REG_READ(ah,
801 chan_info_tab[i] + offset);
806 idx, iq_res[idx], idx + 1,
810 if (!ar9003_hw_calc_iq_corr(ah, i, iq_res,
813 "Failed in calculation of \
818 coeff.mag_coeff[i][im] = coeff.iqc_coeff[0] & 0x7f;
819 coeff.phs_coeff[i][im] =
820 (coeff.iqc_coeff[0] >> 7) & 0x7f;
822 if (coeff.mag_coeff[i][im] > 63)
823 coeff.mag_coeff[i][im] -= 128;
824 if (coeff.phs_coeff[i][im] > 63)
825 coeff.phs_coeff[i][im] -= 128;
828 ar9003_hw_tx_iqcal_load_avg_2_passes(ah, num_chains, &coeff);
833 DBG("ath9k: Tx IQ Cal failed\n");
836 static int ar9003_hw_init_cal(struct ath_hw *ah,
837 struct ath9k_channel *chan __unused)
839 struct ath9k_hw_capabilities *pCap = &ah->caps;
841 int txiqcal_done = 0;
843 val = REG_READ(ah, AR_ENT_OTP);
844 DBG2("ath9k: ath9k: AR_ENT_OTP 0x%x\n", val);
846 /* Configure rx/tx chains before running AGC/TxiQ cals */
847 if (val & AR_ENT_OTP_CHAIN2_DISABLE)
848 ar9003_hw_set_chain_masks(ah, 0x3, 0x3);
850 ar9003_hw_set_chain_masks(ah, pCap->rx_chainmask,
853 /* Do Tx IQ Calibration */
854 REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_1,
855 AR_PHY_TX_IQCAL_CONTROL_1_IQCORR_I_Q_COFF_DELPT,
859 * For AR9485 or later chips, TxIQ cal runs as part of
862 if (AR_SREV_9485_OR_LATER(ah))
865 txiqcal_done = ar9003_hw_tx_iq_cal_run(ah);
866 REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_DIS);
868 REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_EN);
871 /* Calibrate the AGC */
872 REG_WRITE(ah, AR_PHY_AGC_CONTROL,
873 REG_READ(ah, AR_PHY_AGC_CONTROL) |
874 AR_PHY_AGC_CONTROL_CAL);
876 /* Poll for offset calibration complete */
877 if (!ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL,
878 0, AH_WAIT_TIMEOUT)) {
880 "offset calibration failed to complete in 1ms; noisy environment?\n");
885 ar9003_hw_tx_iq_cal_post_proc(ah);
887 /* Revert chainmasks to their original values before NF cal */
888 ar9003_hw_set_chain_masks(ah, ah->rxchainmask, ah->txchainmask);
890 ath9k_hw_start_nfcal(ah, 1);
892 /* Initialize list pointers */
893 ah->cal_list = ah->cal_list_last = ah->cal_list_curr = NULL;
894 ah->supp_cals = IQ_MISMATCH_CAL;
896 if (ah->supp_cals & IQ_MISMATCH_CAL) {
897 INIT_CAL(&ah->iq_caldata);
898 INSERT_CAL(ah, &ah->iq_caldata);
900 "enabling IQ Calibration.\n");
903 if (ah->supp_cals & TEMP_COMP_CAL) {
904 INIT_CAL(&ah->tempCompCalData);
905 INSERT_CAL(ah, &ah->tempCompCalData);
907 "enabling Temperature Compensation Calibration.\n");
910 /* Initialize current pointer to first element in list */
911 ah->cal_list_curr = ah->cal_list;
913 if (ah->cal_list_curr)
914 ath9k_hw_reset_calibration(ah, ah->cal_list_curr);
917 ah->caldata->CalValid = 0;
922 void ar9003_hw_attach_calib_ops(struct ath_hw *ah)
924 struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah);
925 struct ath_hw_ops *ops = ath9k_hw_ops(ah);
927 priv_ops->init_cal_settings = ar9003_hw_init_cal_settings;
928 priv_ops->init_cal = ar9003_hw_init_cal;
929 priv_ops->setup_calibration = ar9003_hw_setup_calibration;
931 ops->calibrate = ar9003_hw_calibrate;