2 * Copyright (c) 2010-2011 Atheros Communications Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 #include "ar9003_phy.h"
20 #include "ar9003_rtt.h"
21 #include "ar9003_mci.h"
23 #define MAX_MEASUREMENT MAX_IQCAL_MEASUREMENT
24 #define MAX_MAG_DELTA 11
25 #define MAX_PHS_DELTA 10
28 int mag_coeff[AR9300_MAX_CHAINS][MAX_MEASUREMENT];
29 int phs_coeff[AR9300_MAX_CHAINS][MAX_MEASUREMENT];
33 enum ar9003_cal_types {
34 IQ_MISMATCH_CAL = BIT(0),
35 TEMP_COMP_CAL = BIT(1),
38 static void ar9003_hw_setup_calibration(struct ath_hw *ah,
39 struct ath9k_cal_list *currCal)
41 struct ath_common *common = ath9k_hw_common(ah);
43 /* Select calibration to run */
44 switch (currCal->calData->calType) {
47 * Start calibration with
48 * 2^(INIT_IQCAL_LOG_COUNT_MAX+1) samples
50 REG_RMW_FIELD(ah, AR_PHY_TIMING4,
51 AR_PHY_TIMING4_IQCAL_LOG_COUNT_MAX,
52 currCal->calData->calCountMax);
53 REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_IQ);
55 ath_dbg(common, CALIBRATE,
56 "starting IQ Mismatch Calibration\n");
59 REG_SET_BIT(ah, AR_PHY_TIMING4, AR_PHY_TIMING4_DO_CAL);
62 REG_RMW_FIELD(ah, AR_PHY_65NM_CH0_THERM,
63 AR_PHY_65NM_CH0_THERM_LOCAL, 1);
64 REG_RMW_FIELD(ah, AR_PHY_65NM_CH0_THERM,
65 AR_PHY_65NM_CH0_THERM_START, 1);
67 ath_dbg(common, CALIBRATE,
68 "starting Temperature Compensation Calibration\n");
74 * Generic calibration routine.
75 * Recalibrate the lower PHY chips to account for temperature/environment
78 static bool ar9003_hw_per_calibration(struct ath_hw *ah,
79 struct ath9k_channel *ichan,
81 struct ath9k_cal_list *currCal)
83 struct ath9k_hw_cal_data *caldata = ah->caldata;
84 /* Cal is assumed not done until explicitly set below */
85 bool iscaldone = false;
87 /* Calibration in progress. */
88 if (currCal->calState == CAL_RUNNING) {
89 /* Check to see if it has finished. */
90 if (!(REG_READ(ah, AR_PHY_TIMING4) & AR_PHY_TIMING4_DO_CAL)) {
92 * Accumulate cal measures for active chains
94 currCal->calData->calCollect(ah);
97 if (ah->cal_samples >=
98 currCal->calData->calNumSamples) {
99 unsigned int i, numChains = 0;
100 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
101 if (rxchainmask & (1 << i))
106 * Process accumulated data
108 currCal->calData->calPostProc(ah, numChains);
110 /* Calibration has finished. */
111 caldata->CalValid |= currCal->calData->calType;
112 currCal->calState = CAL_DONE;
116 * Set-up collection of another sub-sample until we
119 ar9003_hw_setup_calibration(ah, currCal);
122 } else if (!(caldata->CalValid & currCal->calData->calType)) {
123 /* If current cal is marked invalid in channel, kick it off */
124 ath9k_hw_reset_calibration(ah, currCal);
130 static bool ar9003_hw_calibrate(struct ath_hw *ah,
131 struct ath9k_channel *chan,
135 bool iscaldone = true;
136 struct ath9k_cal_list *currCal = ah->cal_list_curr;
139 * For given calibration:
140 * 1. Call generic cal routine
141 * 2. When this cal is done (isCalDone) if we have more cals waiting
142 * (eg after reset), mask this to upper layers by not propagating
143 * isCalDone if it is set to TRUE.
144 * Instead, change isCalDone to FALSE and setup the waiting cal(s)
148 (currCal->calState == CAL_RUNNING ||
149 currCal->calState == CAL_WAITING)) {
150 iscaldone = ar9003_hw_per_calibration(ah, chan,
151 rxchainmask, currCal);
153 ah->cal_list_curr = currCal = currCal->calNext;
155 if (currCal->calState == CAL_WAITING) {
157 ath9k_hw_reset_calibration(ah, currCal);
163 * Do NF cal only at longer intervals. Get the value from
164 * the previous NF cal and update history buffer.
166 if (longcal && ath9k_hw_getnf(ah, chan)) {
168 * Load the NF from history buffer of the current channel.
169 * NF is slow time-variant, so it is OK to use a historical
172 ath9k_hw_loadnf(ah, ah->curchan);
174 /* start NF calibration, without updating BB NF register */
175 ath9k_hw_start_nfcal(ah, false);
181 static void ar9003_hw_iqcal_collect(struct ath_hw *ah)
185 /* Accumulate IQ cal measures for active chains */
186 for (i = 0; i < AR5416_MAX_CHAINS; i++) {
187 if (ah->txchainmask & BIT(i)) {
188 ah->totalPowerMeasI[i] +=
189 REG_READ(ah, AR_PHY_CAL_MEAS_0(i));
190 ah->totalPowerMeasQ[i] +=
191 REG_READ(ah, AR_PHY_CAL_MEAS_1(i));
192 ah->totalIqCorrMeas[i] +=
193 (int32_t) REG_READ(ah, AR_PHY_CAL_MEAS_2(i));
194 ath_dbg(ath9k_hw_common(ah), CALIBRATE,
195 "%d: Chn %d pmi=0x%08x;pmq=0x%08x;iqcm=0x%08x;\n",
196 ah->cal_samples, i, ah->totalPowerMeasI[i],
197 ah->totalPowerMeasQ[i],
198 ah->totalIqCorrMeas[i]);
203 static void ar9003_hw_iqcalibrate(struct ath_hw *ah, u8 numChains)
205 struct ath_common *common = ath9k_hw_common(ah);
206 u32 powerMeasQ, powerMeasI, iqCorrMeas;
207 u32 qCoffDenom, iCoffDenom;
208 int32_t qCoff, iCoff;
210 static const u_int32_t offset_array[3] = {
211 AR_PHY_RX_IQCAL_CORR_B0,
212 AR_PHY_RX_IQCAL_CORR_B1,
213 AR_PHY_RX_IQCAL_CORR_B2,
216 for (i = 0; i < numChains; i++) {
217 powerMeasI = ah->totalPowerMeasI[i];
218 powerMeasQ = ah->totalPowerMeasQ[i];
219 iqCorrMeas = ah->totalIqCorrMeas[i];
221 ath_dbg(common, CALIBRATE,
222 "Starting IQ Cal and Correction for Chain %d\n", i);
224 ath_dbg(common, CALIBRATE,
225 "Original: Chn %d iq_corr_meas = 0x%08x\n",
226 i, ah->totalIqCorrMeas[i]);
230 if (iqCorrMeas > 0x80000000) {
231 iqCorrMeas = (0xffffffff - iqCorrMeas) + 1;
235 ath_dbg(common, CALIBRATE, "Chn %d pwr_meas_i = 0x%08x\n",
237 ath_dbg(common, CALIBRATE, "Chn %d pwr_meas_q = 0x%08x\n",
239 ath_dbg(common, CALIBRATE, "iqCorrNeg is 0x%08x\n", iqCorrNeg);
241 iCoffDenom = (powerMeasI / 2 + powerMeasQ / 2) / 256;
242 qCoffDenom = powerMeasQ / 64;
244 if ((iCoffDenom != 0) && (qCoffDenom != 0)) {
245 iCoff = iqCorrMeas / iCoffDenom;
246 qCoff = powerMeasI / qCoffDenom - 64;
247 ath_dbg(common, CALIBRATE, "Chn %d iCoff = 0x%08x\n",
249 ath_dbg(common, CALIBRATE, "Chn %d qCoff = 0x%08x\n",
252 /* Force bounds on iCoff */
255 else if (iCoff <= -63)
258 /* Negate iCoff if iqCorrNeg == 0 */
259 if (iqCorrNeg == 0x0)
262 /* Force bounds on qCoff */
265 else if (qCoff <= -63)
268 iCoff = iCoff & 0x7f;
269 qCoff = qCoff & 0x7f;
271 ath_dbg(common, CALIBRATE,
272 "Chn %d : iCoff = 0x%x qCoff = 0x%x\n",
274 ath_dbg(common, CALIBRATE,
275 "Register offset (0x%04x) before update = 0x%x\n",
277 REG_READ(ah, offset_array[i]));
279 if (AR_SREV_9565(ah) &&
280 (iCoff == 63 || qCoff == 63 ||
281 iCoff == -63 || qCoff == -63))
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,
290 ath_dbg(common, CALIBRATE,
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]));
295 ath_dbg(common, CALIBRATE,
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]));
301 ath_dbg(common, CALIBRATE,
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);
308 ath_dbg(common, CALIBRATE,
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 bool ar9003_hw_solve_iq_cal(struct ath_hw *ah,
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;
347 struct ath_common *common = ath9k_hw_common(ah);
349 f2 = (f1 * f1 + f3 * f3) / result_shift;
352 ath_dbg(common, CALIBRATE, "Divide by 0\n");
356 /* mag mismatch, tx */
357 mag_tx = f1 * (mag_a0_d0 - mag_a1_d0) + f3 * (phs_a0_d0 - phs_a1_d0);
358 /* phs mismatch, tx */
359 phs_tx = f3 * (-mag_a0_d0 + mag_a1_d0) + f1 * (phs_a0_d0 - phs_a1_d0);
361 mag_tx = (mag_tx / f2);
362 phs_tx = (phs_tx / f2);
364 /* mag mismatch, rx */
365 mag_rx = mag_a0_d0 - (cos_2phi_1 * mag_tx + sin_2phi_1 * phs_tx) /
367 /* phs mismatch, rx */
368 phs_rx = phs_a0_d0 + (sin_2phi_1 * mag_tx - cos_2phi_1 * phs_tx) /
371 solved_eq[0] = mag_tx;
372 solved_eq[1] = phs_tx;
373 solved_eq[2] = mag_rx;
374 solved_eq[3] = phs_rx;
379 static s32 ar9003_hw_find_mag_approx(struct ath_hw *ah, s32 in_re, s32 in_im)
381 s32 abs_i = abs(in_re),
393 return max_abs - (max_abs / 32) + (min_abs / 8) + (min_abs / 4);
398 static bool ar9003_hw_calc_iq_corr(struct ath_hw *ah,
403 s32 i2_m_q2_a0_d0, i2_p_q2_a0_d0, iq_corr_a0_d0,
404 i2_m_q2_a0_d1, i2_p_q2_a0_d1, iq_corr_a0_d1,
405 i2_m_q2_a1_d0, i2_p_q2_a1_d0, iq_corr_a1_d0,
406 i2_m_q2_a1_d1, i2_p_q2_a1_d1, iq_corr_a1_d1;
407 s32 mag_a0_d0, mag_a1_d0, mag_a0_d1, mag_a1_d1,
408 phs_a0_d0, phs_a1_d0, phs_a0_d1, phs_a1_d1,
409 sin_2phi_1, cos_2phi_1,
410 sin_2phi_2, cos_2phi_2;
411 s32 mag_tx, phs_tx, mag_rx, phs_rx;
412 s32 solved_eq[4], mag_corr_tx, phs_corr_tx, mag_corr_rx, phs_corr_rx,
414 const s32 res_scale = 1 << 15;
415 const s32 delpt_shift = 1 << 8;
417 struct ath_common *common = ath9k_hw_common(ah);
419 i2_m_q2_a0_d0 = iq_res[0] & 0xfff;
420 i2_p_q2_a0_d0 = (iq_res[0] >> 12) & 0xfff;
421 iq_corr_a0_d0 = ((iq_res[0] >> 24) & 0xff) + ((iq_res[1] & 0xf) << 8);
423 if (i2_m_q2_a0_d0 > 0x800)
424 i2_m_q2_a0_d0 = -((0xfff - i2_m_q2_a0_d0) + 1);
426 if (i2_p_q2_a0_d0 > 0x800)
427 i2_p_q2_a0_d0 = -((0xfff - i2_p_q2_a0_d0) + 1);
429 if (iq_corr_a0_d0 > 0x800)
430 iq_corr_a0_d0 = -((0xfff - iq_corr_a0_d0) + 1);
432 i2_m_q2_a0_d1 = (iq_res[1] >> 4) & 0xfff;
433 i2_p_q2_a0_d1 = (iq_res[2] & 0xfff);
434 iq_corr_a0_d1 = (iq_res[2] >> 12) & 0xfff;
436 if (i2_m_q2_a0_d1 > 0x800)
437 i2_m_q2_a0_d1 = -((0xfff - i2_m_q2_a0_d1) + 1);
439 if (i2_p_q2_a0_d1 > 0x800)
440 i2_p_q2_a0_d1 = -((0xfff - i2_p_q2_a0_d1) + 1);
442 if (iq_corr_a0_d1 > 0x800)
443 iq_corr_a0_d1 = -((0xfff - iq_corr_a0_d1) + 1);
445 i2_m_q2_a1_d0 = ((iq_res[2] >> 24) & 0xff) + ((iq_res[3] & 0xf) << 8);
446 i2_p_q2_a1_d0 = (iq_res[3] >> 4) & 0xfff;
447 iq_corr_a1_d0 = iq_res[4] & 0xfff;
449 if (i2_m_q2_a1_d0 > 0x800)
450 i2_m_q2_a1_d0 = -((0xfff - i2_m_q2_a1_d0) + 1);
452 if (i2_p_q2_a1_d0 > 0x800)
453 i2_p_q2_a1_d0 = -((0xfff - i2_p_q2_a1_d0) + 1);
455 if (iq_corr_a1_d0 > 0x800)
456 iq_corr_a1_d0 = -((0xfff - iq_corr_a1_d0) + 1);
458 i2_m_q2_a1_d1 = (iq_res[4] >> 12) & 0xfff;
459 i2_p_q2_a1_d1 = ((iq_res[4] >> 24) & 0xff) + ((iq_res[5] & 0xf) << 8);
460 iq_corr_a1_d1 = (iq_res[5] >> 4) & 0xfff;
462 if (i2_m_q2_a1_d1 > 0x800)
463 i2_m_q2_a1_d1 = -((0xfff - i2_m_q2_a1_d1) + 1);
465 if (i2_p_q2_a1_d1 > 0x800)
466 i2_p_q2_a1_d1 = -((0xfff - i2_p_q2_a1_d1) + 1);
468 if (iq_corr_a1_d1 > 0x800)
469 iq_corr_a1_d1 = -((0xfff - iq_corr_a1_d1) + 1);
471 if ((i2_p_q2_a0_d0 == 0) || (i2_p_q2_a0_d1 == 0) ||
472 (i2_p_q2_a1_d0 == 0) || (i2_p_q2_a1_d1 == 0)) {
473 ath_dbg(common, CALIBRATE,
479 i2_p_q2_a0_d0, i2_p_q2_a0_d1,
480 i2_p_q2_a1_d0, i2_p_q2_a1_d1);
484 mag_a0_d0 = (i2_m_q2_a0_d0 * res_scale) / i2_p_q2_a0_d0;
485 phs_a0_d0 = (iq_corr_a0_d0 * res_scale) / i2_p_q2_a0_d0;
487 mag_a0_d1 = (i2_m_q2_a0_d1 * res_scale) / i2_p_q2_a0_d1;
488 phs_a0_d1 = (iq_corr_a0_d1 * res_scale) / i2_p_q2_a0_d1;
490 mag_a1_d0 = (i2_m_q2_a1_d0 * res_scale) / i2_p_q2_a1_d0;
491 phs_a1_d0 = (iq_corr_a1_d0 * res_scale) / i2_p_q2_a1_d0;
493 mag_a1_d1 = (i2_m_q2_a1_d1 * res_scale) / i2_p_q2_a1_d1;
494 phs_a1_d1 = (iq_corr_a1_d1 * res_scale) / i2_p_q2_a1_d1;
496 /* w/o analog phase shift */
497 sin_2phi_1 = (((mag_a0_d0 - mag_a0_d1) * delpt_shift) / DELPT);
498 /* w/o analog phase shift */
499 cos_2phi_1 = (((phs_a0_d1 - phs_a0_d0) * delpt_shift) / DELPT);
500 /* w/ analog phase shift */
501 sin_2phi_2 = (((mag_a1_d0 - mag_a1_d1) * delpt_shift) / DELPT);
502 /* w/ analog phase shift */
503 cos_2phi_2 = (((phs_a1_d1 - phs_a1_d0) * delpt_shift) / DELPT);
506 * force sin^2 + cos^2 = 1;
507 * find magnitude by approximation
509 mag1 = ar9003_hw_find_mag_approx(ah, cos_2phi_1, sin_2phi_1);
510 mag2 = ar9003_hw_find_mag_approx(ah, cos_2phi_2, sin_2phi_2);
512 if ((mag1 == 0) || (mag2 == 0)) {
513 ath_dbg(common, CALIBRATE, "Divide by 0: mag1=%d, mag2=%d\n",
518 /* normalization sin and cos by mag */
519 sin_2phi_1 = (sin_2phi_1 * res_scale / mag1);
520 cos_2phi_1 = (cos_2phi_1 * res_scale / mag1);
521 sin_2phi_2 = (sin_2phi_2 * res_scale / mag2);
522 cos_2phi_2 = (cos_2phi_2 * res_scale / mag2);
524 /* calculate IQ mismatch */
525 if (!ar9003_hw_solve_iq_cal(ah,
526 sin_2phi_1, cos_2phi_1,
527 sin_2phi_2, cos_2phi_2,
528 mag_a0_d0, phs_a0_d0,
530 phs_a1_d0, solved_eq)) {
531 ath_dbg(common, CALIBRATE,
532 "Call to ar9003_hw_solve_iq_cal() failed\n");
536 mag_tx = solved_eq[0];
537 phs_tx = solved_eq[1];
538 mag_rx = solved_eq[2];
539 phs_rx = solved_eq[3];
541 ath_dbg(common, CALIBRATE,
542 "chain %d: mag mismatch=%d phase mismatch=%d\n",
543 chain_idx, mag_tx/res_scale, phs_tx/res_scale);
545 if (res_scale == mag_tx) {
546 ath_dbg(common, CALIBRATE,
547 "Divide by 0: mag_tx=%d, res_scale=%d\n",
552 /* calculate and quantize Tx IQ correction factor */
553 mag_corr_tx = (mag_tx * res_scale) / (res_scale - mag_tx);
554 phs_corr_tx = -phs_tx;
556 q_q_coff = (mag_corr_tx * 128 / res_scale);
557 q_i_coff = (phs_corr_tx * 256 / res_scale);
559 ath_dbg(common, CALIBRATE, "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;
573 ath_dbg(common, CALIBRATE, "tx chain %d: iq corr coeff=%x\n",
574 chain_idx, iqc_coeff[0]);
576 if (-mag_rx == res_scale) {
577 ath_dbg(common, CALIBRATE,
578 "Divide by 0: mag_rx=%d, res_scale=%d\n",
583 /* calculate and quantize Rx IQ correction factors */
584 mag_corr_rx = (-mag_rx * res_scale) / (res_scale + mag_rx);
585 phs_corr_rx = -phs_rx;
587 q_q_coff = (mag_corr_rx * 128 / res_scale);
588 q_i_coff = (phs_corr_rx * 256 / res_scale);
590 ath_dbg(common, CALIBRATE, "rx chain %d: mag corr=%d phase corr=%d\n",
591 chain_idx, q_q_coff, q_i_coff);
602 iqc_coeff[1] = (q_q_coff * 128) + q_i_coff;
604 ath_dbg(common, CALIBRATE, "rx chain %d: iq corr coeff=%x\n",
605 chain_idx, iqc_coeff[1]);
610 static void ar9003_hw_detect_outlier(int *mp_coeff, int nmeasurement,
613 int mp_max = -64, max_idx = 0;
614 int mp_min = 63, min_idx = 0;
615 int mp_avg = 0, i, outlier_idx = 0, mp_count = 0;
617 /* find min/max mismatch across all calibrated gains */
618 for (i = 0; i < nmeasurement; i++) {
619 if (mp_coeff[i] > mp_max) {
620 mp_max = mp_coeff[i];
622 } else if (mp_coeff[i] < mp_min) {
623 mp_min = mp_coeff[i];
628 /* find average (exclude max abs value) */
629 for (i = 0; i < nmeasurement; i++) {
630 if ((abs(mp_coeff[i]) < abs(mp_max)) ||
631 (abs(mp_coeff[i]) < abs(mp_min))) {
632 mp_avg += mp_coeff[i];
638 * finding mean magnitude/phase if possible, otherwise
639 * just use the last value as the mean
644 mp_avg = mp_coeff[nmeasurement - 1];
647 if (abs(mp_max - mp_min) > max_delta) {
648 if (abs(mp_max - mp_avg) > abs(mp_min - mp_avg))
649 outlier_idx = max_idx;
651 outlier_idx = min_idx;
653 mp_coeff[outlier_idx] = mp_avg;
657 static void ar9003_hw_tx_iqcal_load_avg_2_passes(struct ath_hw *ah,
661 int i, im, nmeasurement;
662 u32 tx_corr_coeff[MAX_MEASUREMENT][AR9300_MAX_CHAINS];
663 struct ath9k_hw_cal_data *caldata = ah->caldata;
665 memset(tx_corr_coeff, 0, sizeof(tx_corr_coeff));
666 for (i = 0; i < MAX_MEASUREMENT / 2; i++) {
667 tx_corr_coeff[i * 2][0] = tx_corr_coeff[(i * 2) + 1][0] =
668 AR_PHY_TX_IQCAL_CORR_COEFF_B0(i);
669 if (!AR_SREV_9485(ah)) {
670 tx_corr_coeff[i * 2][1] =
671 tx_corr_coeff[(i * 2) + 1][1] =
672 AR_PHY_TX_IQCAL_CORR_COEFF_B1(i);
674 tx_corr_coeff[i * 2][2] =
675 tx_corr_coeff[(i * 2) + 1][2] =
676 AR_PHY_TX_IQCAL_CORR_COEFF_B2(i);
680 /* Load the average of 2 passes */
681 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
682 if (!(ah->txchainmask & (1 << i)))
684 nmeasurement = REG_READ_FIELD(ah,
685 AR_PHY_TX_IQCAL_STATUS_B0,
686 AR_PHY_CALIBRATED_GAINS_0);
688 if (nmeasurement > MAX_MEASUREMENT)
689 nmeasurement = MAX_MEASUREMENT;
691 /* detect outlier only if nmeasurement > 1 */
692 if (nmeasurement > 1) {
693 /* Detect magnitude outlier */
694 ar9003_hw_detect_outlier(coeff->mag_coeff[i],
695 nmeasurement, MAX_MAG_DELTA);
697 /* Detect phase outlier */
698 ar9003_hw_detect_outlier(coeff->phs_coeff[i],
699 nmeasurement, MAX_PHS_DELTA);
702 for (im = 0; im < nmeasurement; im++) {
704 coeff->iqc_coeff[0] = (coeff->mag_coeff[i][im] & 0x7f) |
705 ((coeff->phs_coeff[i][im] & 0x7f) << 7);
708 REG_RMW_FIELD(ah, tx_corr_coeff[im][i],
709 AR_PHY_TX_IQCAL_CORR_COEFF_00_COEFF_TABLE,
710 coeff->iqc_coeff[0]);
712 REG_RMW_FIELD(ah, tx_corr_coeff[im][i],
713 AR_PHY_TX_IQCAL_CORR_COEFF_01_COEFF_TABLE,
714 coeff->iqc_coeff[0]);
717 caldata->tx_corr_coeff[im][i] =
721 caldata->num_measures[i] = nmeasurement;
724 REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_3,
725 AR_PHY_TX_IQCAL_CONTROL_3_IQCORR_EN, 0x1);
726 REG_RMW_FIELD(ah, AR_PHY_RX_IQCAL_CORR_B0,
727 AR_PHY_RX_IQCAL_CORR_B0_LOOPBACK_IQCORR_EN, 0x1);
730 caldata->done_txiqcal_once = is_reusable;
735 static bool ar9003_hw_tx_iq_cal_run(struct ath_hw *ah)
737 struct ath_common *common = ath9k_hw_common(ah);
740 tx_gain_forced = REG_READ_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
741 AR_PHY_TXGAIN_FORCE);
743 REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
744 AR_PHY_TXGAIN_FORCE, 0);
746 REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_START,
747 AR_PHY_TX_IQCAL_START_DO_CAL, 1);
749 if (!ath9k_hw_wait(ah, AR_PHY_TX_IQCAL_START,
750 AR_PHY_TX_IQCAL_START_DO_CAL, 0,
752 ath_dbg(common, CALIBRATE, "Tx IQ Cal is not completed\n");
758 static void ar9003_hw_tx_iq_cal_post_proc(struct ath_hw *ah, bool is_reusable)
760 struct ath_common *common = ath9k_hw_common(ah);
761 const u32 txiqcal_status[AR9300_MAX_CHAINS] = {
762 AR_PHY_TX_IQCAL_STATUS_B0,
763 AR_PHY_TX_IQCAL_STATUS_B1,
764 AR_PHY_TX_IQCAL_STATUS_B2,
766 const u_int32_t chan_info_tab[] = {
767 AR_PHY_CHAN_INFO_TAB_0,
768 AR_PHY_CHAN_INFO_TAB_1,
769 AR_PHY_CHAN_INFO_TAB_2,
776 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
777 if (!(ah->txchainmask & (1 << i)))
780 nmeasurement = REG_READ_FIELD(ah,
781 AR_PHY_TX_IQCAL_STATUS_B0,
782 AR_PHY_CALIBRATED_GAINS_0);
783 if (nmeasurement > MAX_MEASUREMENT)
784 nmeasurement = MAX_MEASUREMENT;
786 for (im = 0; im < nmeasurement; im++) {
787 ath_dbg(common, CALIBRATE,
788 "Doing Tx IQ Cal for chain %d\n", i);
790 if (REG_READ(ah, txiqcal_status[i]) &
791 AR_PHY_TX_IQCAL_STATUS_FAILED) {
792 ath_dbg(common, CALIBRATE,
793 "Tx IQ Cal failed for chain %d\n", i);
797 for (j = 0; j < 3; j++) {
798 u32 idx = 2 * j, offset = 4 * (3 * im + j);
801 AR_PHY_CHAN_INFO_MEMORY,
802 AR_PHY_CHAN_INFO_TAB_S2_READ,
806 iq_res[idx] = REG_READ(ah,
811 AR_PHY_CHAN_INFO_MEMORY,
812 AR_PHY_CHAN_INFO_TAB_S2_READ,
816 iq_res[idx + 1] = 0xffff & REG_READ(ah,
817 chan_info_tab[i] + offset);
819 ath_dbg(common, CALIBRATE,
820 "IQ_RES[%d]=0x%x IQ_RES[%d]=0x%x\n",
821 idx, iq_res[idx], idx + 1,
825 if (!ar9003_hw_calc_iq_corr(ah, i, iq_res,
827 ath_dbg(common, CALIBRATE,
828 "Failed in calculation of IQ correction\n");
832 coeff.mag_coeff[i][im] = coeff.iqc_coeff[0] & 0x7f;
833 coeff.phs_coeff[i][im] =
834 (coeff.iqc_coeff[0] >> 7) & 0x7f;
836 if (coeff.mag_coeff[i][im] > 63)
837 coeff.mag_coeff[i][im] -= 128;
838 if (coeff.phs_coeff[i][im] > 63)
839 coeff.phs_coeff[i][im] -= 128;
842 ar9003_hw_tx_iqcal_load_avg_2_passes(ah, &coeff, is_reusable);
847 ath_dbg(common, CALIBRATE, "Tx IQ Cal failed\n");
851 static void ar9003_hw_tx_iq_cal_reload(struct ath_hw *ah)
853 struct ath9k_hw_cal_data *caldata = ah->caldata;
854 u32 tx_corr_coeff[MAX_MEASUREMENT][AR9300_MAX_CHAINS];
857 memset(tx_corr_coeff, 0, sizeof(tx_corr_coeff));
858 for (i = 0; i < MAX_MEASUREMENT / 2; i++) {
859 tx_corr_coeff[i * 2][0] = tx_corr_coeff[(i * 2) + 1][0] =
860 AR_PHY_TX_IQCAL_CORR_COEFF_B0(i);
861 if (!AR_SREV_9485(ah)) {
862 tx_corr_coeff[i * 2][1] =
863 tx_corr_coeff[(i * 2) + 1][1] =
864 AR_PHY_TX_IQCAL_CORR_COEFF_B1(i);
866 tx_corr_coeff[i * 2][2] =
867 tx_corr_coeff[(i * 2) + 1][2] =
868 AR_PHY_TX_IQCAL_CORR_COEFF_B2(i);
872 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
873 if (!(ah->txchainmask & (1 << i)))
876 for (im = 0; im < caldata->num_measures[i]; im++) {
878 REG_RMW_FIELD(ah, tx_corr_coeff[im][i],
879 AR_PHY_TX_IQCAL_CORR_COEFF_00_COEFF_TABLE,
880 caldata->tx_corr_coeff[im][i]);
882 REG_RMW_FIELD(ah, tx_corr_coeff[im][i],
883 AR_PHY_TX_IQCAL_CORR_COEFF_01_COEFF_TABLE,
884 caldata->tx_corr_coeff[im][i]);
888 REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_3,
889 AR_PHY_TX_IQCAL_CONTROL_3_IQCORR_EN, 0x1);
890 REG_RMW_FIELD(ah, AR_PHY_RX_IQCAL_CORR_B0,
891 AR_PHY_RX_IQCAL_CORR_B0_LOOPBACK_IQCORR_EN, 0x1);
894 static void ar9003_hw_manual_peak_cal(struct ath_hw *ah, u8 chain, bool is_2g)
896 int offset[8], total = 0, test;
899 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_GAINSTAGES(chain),
900 AR_PHY_65NM_RXRF_GAINSTAGES_RX_OVERRIDE, 0x1);
901 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_GAINSTAGES(chain),
902 AR_PHY_65NM_RXRF_GAINSTAGES_LNAON_CALDC, 0x0);
904 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_GAINSTAGES(chain),
905 AR_PHY_65NM_RXRF_GAINSTAGES_LNA2G_GAIN_OVR, 0x0);
907 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_GAINSTAGES(chain),
908 AR_PHY_65NM_RXRF_GAINSTAGES_LNA5G_GAIN_OVR, 0x0);
910 REG_RMW_FIELD(ah, AR_PHY_65NM_RXTX2(chain),
911 AR_PHY_65NM_RXTX2_RXON_OVR, 0x1);
912 REG_RMW_FIELD(ah, AR_PHY_65NM_RXTX2(chain),
913 AR_PHY_65NM_RXTX2_RXON, 0x0);
915 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
916 AR_PHY_65NM_RXRF_AGC_AGC_OVERRIDE, 0x1);
917 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
918 AR_PHY_65NM_RXRF_AGC_AGC_ON_OVR, 0x1);
919 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
920 AR_PHY_65NM_RXRF_AGC_AGC_CAL_OVR, 0x1);
922 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
923 AR_PHY_65NM_RXRF_AGC_AGC2G_DBDAC_OVR, 0x0);
925 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
926 AR_PHY_65NM_RXRF_AGC_AGC5G_DBDAC_OVR, 0x0);
928 for (i = 6; i > 0; i--) {
929 offset[i] = BIT(i - 1);
930 test = total + offset[i];
933 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
934 AR_PHY_65NM_RXRF_AGC_AGC2G_CALDAC_OVR,
937 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
938 AR_PHY_65NM_RXRF_AGC_AGC5G_CALDAC_OVR,
941 agc_out = REG_READ_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
942 AR_PHY_65NM_RXRF_AGC_AGC_OUT);
943 offset[i] = (agc_out) ? 0 : 1;
944 total += (offset[i] << (i - 1));
948 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
949 AR_PHY_65NM_RXRF_AGC_AGC2G_CALDAC_OVR, total);
951 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
952 AR_PHY_65NM_RXRF_AGC_AGC5G_CALDAC_OVR, total);
954 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_GAINSTAGES(chain),
955 AR_PHY_65NM_RXRF_GAINSTAGES_RX_OVERRIDE, 0);
956 REG_RMW_FIELD(ah, AR_PHY_65NM_RXTX2(chain),
957 AR_PHY_65NM_RXTX2_RXON_OVR, 0);
958 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
959 AR_PHY_65NM_RXRF_AGC_AGC_CAL_OVR, 0);
962 static bool ar9003_hw_init_cal(struct ath_hw *ah,
963 struct ath9k_channel *chan)
965 struct ath_common *common = ath9k_hw_common(ah);
966 struct ath9k_hw_cal_data *caldata = ah->caldata;
967 bool txiqcal_done = false, txclcal_done = false;
968 bool is_reusable = true, status = true;
969 bool run_rtt_cal = false, run_agc_cal;
970 bool rtt = !!(ah->caps.hw_caps & ATH9K_HW_CAP_RTT);
971 u32 agc_ctrl = 0, agc_supp_cals = AR_PHY_AGC_CONTROL_OFFSET_CAL |
972 AR_PHY_AGC_CONTROL_FLTR_CAL |
973 AR_PHY_AGC_CONTROL_PKDET_CAL;
975 u32 cl_idx[AR9300_MAX_CHAINS] = { AR_PHY_CL_TAB_0,
979 ar9003_hw_set_chain_masks(ah, ah->caps.rx_chainmask, ah->caps.tx_chainmask);
982 if (!ar9003_hw_rtt_restore(ah, chan))
986 ath_dbg(common, CALIBRATE, "RTT calibration to be done\n");
989 run_agc_cal = run_rtt_cal;
992 ar9003_hw_rtt_enable(ah);
993 ar9003_hw_rtt_set_mask(ah, 0x00);
994 ar9003_hw_rtt_clear_hist(ah);
997 if (rtt && !run_rtt_cal) {
998 agc_ctrl = REG_READ(ah, AR_PHY_AGC_CONTROL);
999 agc_supp_cals &= agc_ctrl;
1000 agc_ctrl &= ~(AR_PHY_AGC_CONTROL_OFFSET_CAL |
1001 AR_PHY_AGC_CONTROL_FLTR_CAL |
1002 AR_PHY_AGC_CONTROL_PKDET_CAL);
1003 REG_WRITE(ah, AR_PHY_AGC_CONTROL, agc_ctrl);
1006 if (ah->enabled_cals & TX_CL_CAL) {
1007 if (caldata && caldata->done_txclcal_once)
1008 REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL,
1009 AR_PHY_CL_CAL_ENABLE);
1011 REG_SET_BIT(ah, AR_PHY_CL_CAL_CTL,
1012 AR_PHY_CL_CAL_ENABLE);
1017 if (!(ah->enabled_cals & TX_IQ_CAL))
1020 /* Do Tx IQ Calibration */
1021 REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_1,
1022 AR_PHY_TX_IQCAL_CONTROL_1_IQCORR_I_Q_COFF_DELPT,
1026 * For AR9485 or later chips, TxIQ cal runs as part of
1029 if (ah->enabled_cals & TX_IQ_ON_AGC_CAL) {
1030 if (caldata && !caldata->done_txiqcal_once)
1031 REG_SET_BIT(ah, AR_PHY_TX_IQCAL_CONTROL_0,
1032 AR_PHY_TX_IQCAL_CONTROL_0_ENABLE_TXIQ_CAL);
1034 REG_CLR_BIT(ah, AR_PHY_TX_IQCAL_CONTROL_0,
1035 AR_PHY_TX_IQCAL_CONTROL_0_ENABLE_TXIQ_CAL);
1036 txiqcal_done = run_agc_cal = true;
1038 } else if (caldata && !caldata->done_txiqcal_once)
1041 if (ath9k_hw_mci_is_enabled(ah) && IS_CHAN_2GHZ(chan) && run_agc_cal)
1042 ar9003_mci_init_cal_req(ah, &is_reusable);
1044 if (!(IS_CHAN_HALF_RATE(chan) || IS_CHAN_QUARTER_RATE(chan))) {
1045 txiqcal_done = ar9003_hw_tx_iq_cal_run(ah);
1046 REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_DIS);
1048 REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_EN);
1052 if (run_agc_cal || !(ah->ah_flags & AH_FASTCC)) {
1053 /* Calibrate the AGC */
1054 REG_WRITE(ah, AR_PHY_AGC_CONTROL,
1055 REG_READ(ah, AR_PHY_AGC_CONTROL) |
1056 AR_PHY_AGC_CONTROL_CAL);
1058 /* Poll for offset calibration complete */
1059 status = ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL,
1060 AR_PHY_AGC_CONTROL_CAL,
1061 0, AH_WAIT_TIMEOUT);
1062 if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
1063 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
1064 if (!(ah->rxchainmask & (1 << i)))
1066 ar9003_hw_manual_peak_cal(ah, i,
1067 IS_CHAN_2GHZ(chan));
1072 if (ath9k_hw_mci_is_enabled(ah) && IS_CHAN_2GHZ(chan) && run_agc_cal)
1073 ar9003_mci_init_cal_done(ah);
1075 if (rtt && !run_rtt_cal) {
1076 agc_ctrl |= agc_supp_cals;
1077 REG_WRITE(ah, AR_PHY_AGC_CONTROL, agc_ctrl);
1082 ar9003_hw_rtt_disable(ah);
1084 ath_dbg(common, CALIBRATE,
1085 "offset calibration failed to complete in 1ms; noisy environment?\n");
1090 ar9003_hw_tx_iq_cal_post_proc(ah, is_reusable);
1091 else if (caldata && caldata->done_txiqcal_once)
1092 ar9003_hw_tx_iq_cal_reload(ah);
1094 #define CL_TAB_ENTRY(reg_base) (reg_base + (4 * j))
1095 if (caldata && (ah->enabled_cals & TX_CL_CAL)) {
1096 txclcal_done = !!(REG_READ(ah, AR_PHY_AGC_CONTROL) &
1097 AR_PHY_AGC_CONTROL_CLC_SUCCESS);
1098 if (caldata->done_txclcal_once) {
1099 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
1100 if (!(ah->txchainmask & (1 << i)))
1102 for (j = 0; j < MAX_CL_TAB_ENTRY; j++)
1103 REG_WRITE(ah, CL_TAB_ENTRY(cl_idx[i]),
1104 caldata->tx_clcal[i][j]);
1106 } else if (is_reusable && txclcal_done) {
1107 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
1108 if (!(ah->txchainmask & (1 << i)))
1110 for (j = 0; j < MAX_CL_TAB_ENTRY; j++)
1111 caldata->tx_clcal[i][j] =
1113 CL_TAB_ENTRY(cl_idx[i]));
1115 caldata->done_txclcal_once = true;
1120 if (run_rtt_cal && caldata) {
1122 if (!ath9k_hw_rfbus_req(ah))
1123 ath_err(ath9k_hw_common(ah),
1124 "Could not stop baseband\n");
1126 ar9003_hw_rtt_fill_hist(ah);
1128 ath9k_hw_rfbus_done(ah);
1131 ar9003_hw_rtt_disable(ah);
1134 /* Initialize list pointers */
1135 ah->cal_list = ah->cal_list_last = ah->cal_list_curr = NULL;
1136 ah->supp_cals = IQ_MISMATCH_CAL;
1138 if (ah->supp_cals & IQ_MISMATCH_CAL) {
1139 INIT_CAL(&ah->iq_caldata);
1140 INSERT_CAL(ah, &ah->iq_caldata);
1141 ath_dbg(common, CALIBRATE, "enabling IQ Calibration\n");
1144 if (ah->supp_cals & TEMP_COMP_CAL) {
1145 INIT_CAL(&ah->tempCompCalData);
1146 INSERT_CAL(ah, &ah->tempCompCalData);
1147 ath_dbg(common, CALIBRATE,
1148 "enabling Temperature Compensation Calibration\n");
1151 /* Initialize current pointer to first element in list */
1152 ah->cal_list_curr = ah->cal_list;
1154 if (ah->cal_list_curr)
1155 ath9k_hw_reset_calibration(ah, ah->cal_list_curr);
1158 caldata->CalValid = 0;
1163 void ar9003_hw_attach_calib_ops(struct ath_hw *ah)
1165 struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah);
1166 struct ath_hw_ops *ops = ath9k_hw_ops(ah);
1168 priv_ops->init_cal_settings = ar9003_hw_init_cal_settings;
1169 priv_ops->init_cal = ar9003_hw_init_cal;
1170 priv_ops->setup_calibration = ar9003_hw_setup_calibration;
1172 ops->calibrate = ar9003_hw_calibrate;