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1/*
2 * Copyright (c) 2010-2011 Atheros Communications Inc.
3 *
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.
7 *
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.
15 */
16
17#include "hw.h"
18#include "hw-ops.h"
19#include "ar9003_phy.h"
20
21#define MAX_MEASUREMENT 8
22#define MAX_MAG_DELTA 11
23#define MAX_PHS_DELTA 10
24
25struct coeff {
26 int mag_coeff[AR9300_MAX_CHAINS][MAX_MEASUREMENT];
27 int phs_coeff[AR9300_MAX_CHAINS][MAX_MEASUREMENT];
28 int iqc_coeff[2];
29};
30
31enum ar9003_cal_types {
32 IQ_MISMATCH_CAL = BIT(0),
33 TEMP_COMP_CAL = BIT(1),
34};
35
36static void ar9003_hw_setup_calibration(struct ath_hw *ah,
37 struct ath9k_cal_list *currCal)
38{
39 struct ath_common *common = ath9k_hw_common(ah);
40
41 /* Select calibration to run */
42 switch (currCal->calData->calType) {
43 case IQ_MISMATCH_CAL:
44 /*
45 * Start calibration with
46 * 2^(INIT_IQCAL_LOG_COUNT_MAX+1) samples
47 */
48 REG_RMW_FIELD(ah, AR_PHY_TIMING4,
49 AR_PHY_TIMING4_IQCAL_LOG_COUNT_MAX,
50 currCal->calData->calCountMax);
51 REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_IQ);
52
53 ath_dbg(common, ATH_DBG_CALIBRATE,
54 "starting IQ Mismatch Calibration\n");
55
56 /* Kick-off cal */
57 REG_SET_BIT(ah, AR_PHY_TIMING4, AR_PHY_TIMING4_DO_CAL);
58 break;
59 case TEMP_COMP_CAL:
60 REG_RMW_FIELD(ah, AR_PHY_65NM_CH0_THERM,
61 AR_PHY_65NM_CH0_THERM_LOCAL, 1);
62 REG_RMW_FIELD(ah, AR_PHY_65NM_CH0_THERM,
63 AR_PHY_65NM_CH0_THERM_START, 1);
64
65 ath_dbg(common, ATH_DBG_CALIBRATE,
66 "starting Temperature Compensation Calibration\n");
67 break;
68 }
69}
70
71/*
72 * Generic calibration routine.
73 * Recalibrate the lower PHY chips to account for temperature/environment
74 * changes.
75 */
76static bool ar9003_hw_per_calibration(struct ath_hw *ah,
77 struct ath9k_channel *ichan,
78 u8 rxchainmask,
79 struct ath9k_cal_list *currCal)
80{
81 struct ath9k_hw_cal_data *caldata = ah->caldata;
82 /* Cal is assumed not done until explicitly set below */
83 bool iscaldone = false;
84
85 /* Calibration in progress. */
86 if (currCal->calState == CAL_RUNNING) {
87 /* Check to see if it has finished. */
88 if (!(REG_READ(ah, AR_PHY_TIMING4) & AR_PHY_TIMING4_DO_CAL)) {
89 /*
90 * Accumulate cal measures for active chains
91 */
92 currCal->calData->calCollect(ah);
93 ah->cal_samples++;
94
95 if (ah->cal_samples >=
96 currCal->calData->calNumSamples) {
97 unsigned int i, numChains = 0;
98 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
99 if (rxchainmask & (1 << i))
100 numChains++;
101 }
102
103 /*
104 * Process accumulated data
105 */
106 currCal->calData->calPostProc(ah, numChains);
107
108 /* Calibration has finished. */
109 caldata->CalValid |= currCal->calData->calType;
110 currCal->calState = CAL_DONE;
111 iscaldone = true;
112 } else {
113 /*
114 * Set-up collection of another sub-sample until we
115 * get desired number
116 */
117 ar9003_hw_setup_calibration(ah, currCal);
118 }
119 }
120 } else if (!(caldata->CalValid & currCal->calData->calType)) {
121 /* If current cal is marked invalid in channel, kick it off */
122 ath9k_hw_reset_calibration(ah, currCal);
123 }
124
125 return iscaldone;
126}
127
128static bool ar9003_hw_calibrate(struct ath_hw *ah,
129 struct ath9k_channel *chan,
130 u8 rxchainmask,
131 bool longcal)
132{
133 bool iscaldone = true;
134 struct ath9k_cal_list *currCal = ah->cal_list_curr;
135
136 /*
137 * For given calibration:
138 * 1. Call generic cal routine
139 * 2. When this cal is done (isCalDone) if we have more cals waiting
140 * (eg after reset), mask this to upper layers by not propagating
141 * isCalDone if it is set to TRUE.
142 * Instead, change isCalDone to FALSE and setup the waiting cal(s)
143 * to be run.
144 */
145 if (currCal &&
146 (currCal->calState == CAL_RUNNING ||
147 currCal->calState == CAL_WAITING)) {
148 iscaldone = ar9003_hw_per_calibration(ah, chan,
149 rxchainmask, currCal);
150 if (iscaldone) {
151 ah->cal_list_curr = currCal = currCal->calNext;
152
153 if (currCal->calState == CAL_WAITING) {
154 iscaldone = false;
155 ath9k_hw_reset_calibration(ah, currCal);
156 }
157 }
158 }
159
160 /* Do NF cal only at longer intervals */
161 if (longcal) {
162 /*
163 * Get the value from the previous NF cal and update
164 * history buffer.
165 */
166 ath9k_hw_getnf(ah, chan);
167
168 /*
169 * Load the NF from history buffer of the current channel.
170 * NF is slow time-variant, so it is OK to use a historical
171 * value.
172 */
173 ath9k_hw_loadnf(ah, ah->curchan);
174
175 /* start NF calibration, without updating BB NF register */
176 ath9k_hw_start_nfcal(ah, false);
177 }
178
179 return iscaldone;
180}
181
182static void ar9003_hw_iqcal_collect(struct ath_hw *ah)
183{
184 int i;
185
186 /* Accumulate IQ cal measures for active chains */
187 for (i = 0; i < AR5416_MAX_CHAINS; i++) {
188 if (ah->txchainmask & BIT(i)) {
189 ah->totalPowerMeasI[i] +=
190 REG_READ(ah, AR_PHY_CAL_MEAS_0(i));
191 ah->totalPowerMeasQ[i] +=
192 REG_READ(ah, AR_PHY_CAL_MEAS_1(i));
193 ah->totalIqCorrMeas[i] +=
194 (int32_t) REG_READ(ah, AR_PHY_CAL_MEAS_2(i));
195 ath_dbg(ath9k_hw_common(ah), ATH_DBG_CALIBRATE,
196 "%d: Chn %d pmi=0x%08x;pmq=0x%08x;iqcm=0x%08x;\n",
197 ah->cal_samples, i, ah->totalPowerMeasI[i],
198 ah->totalPowerMeasQ[i],
199 ah->totalIqCorrMeas[i]);
200 }
201 }
202}
203
204static void ar9003_hw_iqcalibrate(struct ath_hw *ah, u8 numChains)
205{
206 struct ath_common *common = ath9k_hw_common(ah);
207 u32 powerMeasQ, powerMeasI, iqCorrMeas;
208 u32 qCoffDenom, iCoffDenom;
209 int32_t qCoff, iCoff;
210 int iqCorrNeg, i;
211 static const u_int32_t offset_array[3] = {
212 AR_PHY_RX_IQCAL_CORR_B0,
213 AR_PHY_RX_IQCAL_CORR_B1,
214 AR_PHY_RX_IQCAL_CORR_B2,
215 };
216
217 for (i = 0; i < numChains; i++) {
218 powerMeasI = ah->totalPowerMeasI[i];
219 powerMeasQ = ah->totalPowerMeasQ[i];
220 iqCorrMeas = ah->totalIqCorrMeas[i];
221
222 ath_dbg(common, ATH_DBG_CALIBRATE,
223 "Starting IQ Cal and Correction for Chain %d\n",
224 i);
225
226 ath_dbg(common, ATH_DBG_CALIBRATE,
227 "Orignal: Chn %diq_corr_meas = 0x%08x\n",
228 i, ah->totalIqCorrMeas[i]);
229
230 iqCorrNeg = 0;
231
232 if (iqCorrMeas > 0x80000000) {
233 iqCorrMeas = (0xffffffff - iqCorrMeas) + 1;
234 iqCorrNeg = 1;
235 }
236
237 ath_dbg(common, ATH_DBG_CALIBRATE,
238 "Chn %d pwr_meas_i = 0x%08x\n", i, powerMeasI);
239 ath_dbg(common, ATH_DBG_CALIBRATE,
240 "Chn %d pwr_meas_q = 0x%08x\n", i, powerMeasQ);
241 ath_dbg(common, ATH_DBG_CALIBRATE, "iqCorrNeg is 0x%08x\n",
242 iqCorrNeg);
243
244 iCoffDenom = (powerMeasI / 2 + powerMeasQ / 2) / 256;
245 qCoffDenom = powerMeasQ / 64;
246
247 if ((iCoffDenom != 0) && (qCoffDenom != 0)) {
248 iCoff = iqCorrMeas / iCoffDenom;
249 qCoff = powerMeasI / qCoffDenom - 64;
250 ath_dbg(common, ATH_DBG_CALIBRATE,
251 "Chn %d iCoff = 0x%08x\n", i, iCoff);
252 ath_dbg(common, ATH_DBG_CALIBRATE,
253 "Chn %d qCoff = 0x%08x\n", i, qCoff);
254
255 /* Force bounds on iCoff */
256 if (iCoff >= 63)
257 iCoff = 63;
258 else if (iCoff <= -63)
259 iCoff = -63;
260
261 /* Negate iCoff if iqCorrNeg == 0 */
262 if (iqCorrNeg == 0x0)
263 iCoff = -iCoff;
264
265 /* Force bounds on qCoff */
266 if (qCoff >= 63)
267 qCoff = 63;
268 else if (qCoff <= -63)
269 qCoff = -63;
270
271 iCoff = iCoff & 0x7f;
272 qCoff = qCoff & 0x7f;
273
274 ath_dbg(common, ATH_DBG_CALIBRATE,
275 "Chn %d : iCoff = 0x%x qCoff = 0x%x\n",
276 i, iCoff, qCoff);
277 ath_dbg(common, ATH_DBG_CALIBRATE,
278 "Register offset (0x%04x) before update = 0x%x\n",
279 offset_array[i],
280 REG_READ(ah, offset_array[i]));
281
282 REG_RMW_FIELD(ah, offset_array[i],
283 AR_PHY_RX_IQCAL_CORR_IQCORR_Q_I_COFF,
284 iCoff);
285 REG_RMW_FIELD(ah, offset_array[i],
286 AR_PHY_RX_IQCAL_CORR_IQCORR_Q_Q_COFF,
287 qCoff);
288 ath_dbg(common, ATH_DBG_CALIBRATE,
289 "Register offset (0x%04x) QI COFF (bitfields 0x%08x) after update = 0x%x\n",
290 offset_array[i],
291 AR_PHY_RX_IQCAL_CORR_IQCORR_Q_I_COFF,
292 REG_READ(ah, offset_array[i]));
293 ath_dbg(common, ATH_DBG_CALIBRATE,
294 "Register offset (0x%04x) QQ COFF (bitfields 0x%08x) after update = 0x%x\n",
295 offset_array[i],
296 AR_PHY_RX_IQCAL_CORR_IQCORR_Q_Q_COFF,
297 REG_READ(ah, offset_array[i]));
298
299 ath_dbg(common, ATH_DBG_CALIBRATE,
300 "IQ Cal and Correction done for Chain %d\n", i);
301 }
302 }
303
304 REG_SET_BIT(ah, AR_PHY_RX_IQCAL_CORR_B0,
305 AR_PHY_RX_IQCAL_CORR_IQCORR_ENABLE);
306 ath_dbg(common, ATH_DBG_CALIBRATE,
307 "IQ Cal and Correction (offset 0x%04x) enabled (bit position 0x%08x). New Value 0x%08x\n",
308 (unsigned) (AR_PHY_RX_IQCAL_CORR_B0),
309 AR_PHY_RX_IQCAL_CORR_IQCORR_ENABLE,
310 REG_READ(ah, AR_PHY_RX_IQCAL_CORR_B0));
311}
312
313static const struct ath9k_percal_data iq_cal_single_sample = {
314 IQ_MISMATCH_CAL,
315 MIN_CAL_SAMPLES,
316 PER_MAX_LOG_COUNT,
317 ar9003_hw_iqcal_collect,
318 ar9003_hw_iqcalibrate
319};
320
321static void ar9003_hw_init_cal_settings(struct ath_hw *ah)
322{
323 ah->iq_caldata.calData = &iq_cal_single_sample;
324}
325
326/*
327 * solve 4x4 linear equation used in loopback iq cal.
328 */
329static bool ar9003_hw_solve_iq_cal(struct ath_hw *ah,
330 s32 sin_2phi_1,
331 s32 cos_2phi_1,
332 s32 sin_2phi_2,
333 s32 cos_2phi_2,
334 s32 mag_a0_d0,
335 s32 phs_a0_d0,
336 s32 mag_a1_d0,
337 s32 phs_a1_d0,
338 s32 solved_eq[])
339{
340 s32 f1 = cos_2phi_1 - cos_2phi_2,
341 f3 = sin_2phi_1 - sin_2phi_2,
342 f2;
343 s32 mag_tx, phs_tx, mag_rx, phs_rx;
344 const s32 result_shift = 1 << 15;
345 struct ath_common *common = ath9k_hw_common(ah);
346
347 f2 = (f1 * f1 + f3 * f3) / result_shift;
348
349 if (!f2) {
350 ath_dbg(common, ATH_DBG_CALIBRATE, "Divide by 0\n");
351 return false;
352 }
353
354 /* mag mismatch, tx */
355 mag_tx = f1 * (mag_a0_d0 - mag_a1_d0) + f3 * (phs_a0_d0 - phs_a1_d0);
356 /* phs mismatch, tx */
357 phs_tx = f3 * (-mag_a0_d0 + mag_a1_d0) + f1 * (phs_a0_d0 - phs_a1_d0);
358
359 mag_tx = (mag_tx / f2);
360 phs_tx = (phs_tx / f2);
361
362 /* mag mismatch, rx */
363 mag_rx = mag_a0_d0 - (cos_2phi_1 * mag_tx + sin_2phi_1 * phs_tx) /
364 result_shift;
365 /* phs mismatch, rx */
366 phs_rx = phs_a0_d0 + (sin_2phi_1 * mag_tx - cos_2phi_1 * phs_tx) /
367 result_shift;
368
369 solved_eq[0] = mag_tx;
370 solved_eq[1] = phs_tx;
371 solved_eq[2] = mag_rx;
372 solved_eq[3] = phs_rx;
373
374 return true;
375}
376
377static s32 ar9003_hw_find_mag_approx(struct ath_hw *ah, s32 in_re, s32 in_im)
378{
379 s32 abs_i = abs(in_re),
380 abs_q = abs(in_im),
381 max_abs, min_abs;
382
383 if (abs_i > abs_q) {
384 max_abs = abs_i;
385 min_abs = abs_q;
386 } else {
387 max_abs = abs_q;
388 min_abs = abs_i;
389 }
390
391 return max_abs - (max_abs / 32) + (min_abs / 8) + (min_abs / 4);
392}
393
394#define DELPT 32
395
396static bool ar9003_hw_calc_iq_corr(struct ath_hw *ah,
397 s32 chain_idx,
398 const s32 iq_res[],
399 s32 iqc_coeff[])
400{
401 s32 i2_m_q2_a0_d0, i2_p_q2_a0_d0, iq_corr_a0_d0,
402 i2_m_q2_a0_d1, i2_p_q2_a0_d1, iq_corr_a0_d1,
403 i2_m_q2_a1_d0, i2_p_q2_a1_d0, iq_corr_a1_d0,
404 i2_m_q2_a1_d1, i2_p_q2_a1_d1, iq_corr_a1_d1;
405 s32 mag_a0_d0, mag_a1_d0, mag_a0_d1, mag_a1_d1,
406 phs_a0_d0, phs_a1_d0, phs_a0_d1, phs_a1_d1,
407 sin_2phi_1, cos_2phi_1,
408 sin_2phi_2, cos_2phi_2;
409 s32 mag_tx, phs_tx, mag_rx, phs_rx;
410 s32 solved_eq[4], mag_corr_tx, phs_corr_tx, mag_corr_rx, phs_corr_rx,
411 q_q_coff, q_i_coff;
412 const s32 res_scale = 1 << 15;
413 const s32 delpt_shift = 1 << 8;
414 s32 mag1, mag2;
415 struct ath_common *common = ath9k_hw_common(ah);
416
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);
420
421 if (i2_m_q2_a0_d0 > 0x800)
422 i2_m_q2_a0_d0 = -((0xfff - i2_m_q2_a0_d0) + 1);
423
424 if (i2_p_q2_a0_d0 > 0x800)
425 i2_p_q2_a0_d0 = -((0xfff - i2_p_q2_a0_d0) + 1);
426
427 if (iq_corr_a0_d0 > 0x800)
428 iq_corr_a0_d0 = -((0xfff - iq_corr_a0_d0) + 1);
429
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;
433
434 if (i2_m_q2_a0_d1 > 0x800)
435 i2_m_q2_a0_d1 = -((0xfff - i2_m_q2_a0_d1) + 1);
436
437 if (i2_p_q2_a0_d1 > 0x800)
438 i2_p_q2_a0_d1 = -((0xfff - i2_p_q2_a0_d1) + 1);
439
440 if (iq_corr_a0_d1 > 0x800)
441 iq_corr_a0_d1 = -((0xfff - iq_corr_a0_d1) + 1);
442
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;
446
447 if (i2_m_q2_a1_d0 > 0x800)
448 i2_m_q2_a1_d0 = -((0xfff - i2_m_q2_a1_d0) + 1);
449
450 if (i2_p_q2_a1_d0 > 0x800)
451 i2_p_q2_a1_d0 = -((0xfff - i2_p_q2_a1_d0) + 1);
452
453 if (iq_corr_a1_d0 > 0x800)
454 iq_corr_a1_d0 = -((0xfff - iq_corr_a1_d0) + 1);
455
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;
459
460 if (i2_m_q2_a1_d1 > 0x800)
461 i2_m_q2_a1_d1 = -((0xfff - i2_m_q2_a1_d1) + 1);
462
463 if (i2_p_q2_a1_d1 > 0x800)
464 i2_p_q2_a1_d1 = -((0xfff - i2_p_q2_a1_d1) + 1);
465
466 if (iq_corr_a1_d1 > 0x800)
467 iq_corr_a1_d1 = -((0xfff - iq_corr_a1_d1) + 1);
468
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)) {
471 ath_dbg(common, ATH_DBG_CALIBRATE,
472 "Divide by 0:\n"
473 "a0_d0=%d\n"
474 "a0_d1=%d\n"
475 "a2_d0=%d\n"
476 "a1_d1=%d\n",
477 i2_p_q2_a0_d0, i2_p_q2_a0_d1,
478 i2_p_q2_a1_d0, i2_p_q2_a1_d1);
479 return false;
480 }
481
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;
484
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;
487
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;
490
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;
493
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);
502
503 /*
504 * force sin^2 + cos^2 = 1;
505 * find magnitude by approximation
506 */
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);
509
510 if ((mag1 == 0) || (mag2 == 0)) {
511 ath_dbg(common, ATH_DBG_CALIBRATE,
512 "Divide by 0: mag1=%d, mag2=%d\n",
513 mag1, mag2);
514 return false;
515 }
516
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);
522
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,
528 mag_a1_d0,
529 phs_a1_d0, solved_eq)) {
530 ath_dbg(common, ATH_DBG_CALIBRATE,
531 "Call to ar9003_hw_solve_iq_cal() failed.\n");
532 return false;
533 }
534
535 mag_tx = solved_eq[0];
536 phs_tx = solved_eq[1];
537 mag_rx = solved_eq[2];
538 phs_rx = solved_eq[3];
539
540 ath_dbg(common, ATH_DBG_CALIBRATE,
541 "chain %d: mag mismatch=%d phase mismatch=%d\n",
542 chain_idx, mag_tx/res_scale, phs_tx/res_scale);
543
544 if (res_scale == mag_tx) {
545 ath_dbg(common, ATH_DBG_CALIBRATE,
546 "Divide by 0: mag_tx=%d, res_scale=%d\n",
547 mag_tx, res_scale);
548 return false;
549 }
550
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;
554
555 q_q_coff = (mag_corr_tx * 128 / res_scale);
556 q_i_coff = (phs_corr_tx * 256 / res_scale);
557
558 ath_dbg(common, ATH_DBG_CALIBRATE,
559 "tx chain %d: mag corr=%d phase corr=%d\n",
560 chain_idx, q_q_coff, q_i_coff);
561
562 if (q_i_coff < -63)
563 q_i_coff = -63;
564 if (q_i_coff > 63)
565 q_i_coff = 63;
566 if (q_q_coff < -63)
567 q_q_coff = -63;
568 if (q_q_coff > 63)
569 q_q_coff = 63;
570
571 iqc_coeff[0] = (q_q_coff * 128) + q_i_coff;
572
573 ath_dbg(common, ATH_DBG_CALIBRATE,
574 "tx chain %d: iq corr coeff=%x\n",
575 chain_idx, iqc_coeff[0]);
576
577 if (-mag_rx == res_scale) {
578 ath_dbg(common, ATH_DBG_CALIBRATE,
579 "Divide by 0: mag_rx=%d, res_scale=%d\n",
580 mag_rx, res_scale);
581 return false;
582 }
583
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;
587
588 q_q_coff = (mag_corr_rx * 128 / res_scale);
589 q_i_coff = (phs_corr_rx * 256 / res_scale);
590
591 ath_dbg(common, ATH_DBG_CALIBRATE,
592 "rx chain %d: mag corr=%d phase corr=%d\n",
593 chain_idx, q_q_coff, q_i_coff);
594
595 if (q_i_coff < -63)
596 q_i_coff = -63;
597 if (q_i_coff > 63)
598 q_i_coff = 63;
599 if (q_q_coff < -63)
600 q_q_coff = -63;
601 if (q_q_coff > 63)
602 q_q_coff = 63;
603
604 iqc_coeff[1] = (q_q_coff * 128) + q_i_coff;
605
606 ath_dbg(common, ATH_DBG_CALIBRATE,
607 "rx chain %d: iq corr coeff=%x\n",
608 chain_idx, iqc_coeff[1]);
609
610 return true;
611}
612
613static void ar9003_hw_detect_outlier(int *mp_coeff, int nmeasurement,
614 int max_delta)
615{
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;
619
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];
625 max_idx = i;
626 } else if (mp_coeff[i] < mp_min) {
627 mp_min = mp_coeff[i];
628 min_idx = i;
629 }
630 }
631
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];
637 }
638 mp_avg /= (nmeasurement - 1);
639
640 /* detect outlier */
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;
644 else
645 outlier_idx = min_idx;
646 }
647 mp_coeff[outlier_idx] = mp_avg;
648}
649
650static void ar9003_hw_tx_iqcal_load_avg_2_passes(struct ath_hw *ah,
651 u8 num_chains,
652 struct coeff *coeff)
653{
654 int i, im, nmeasurement;
655 u32 tx_corr_coeff[MAX_MEASUREMENT][AR9300_MAX_CHAINS];
656
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);
665
666 tx_corr_coeff[i * 2][2] =
667 tx_corr_coeff[(i * 2) + 1][2] =
668 AR_PHY_TX_IQCAL_CORR_COEFF_B2(i);
669 }
670 }
671
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);
677
678 if (nmeasurement > MAX_MEASUREMENT)
679 nmeasurement = MAX_MEASUREMENT;
680
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);
686
687 /* Detect phase outlier */
688 ar9003_hw_detect_outlier(coeff->phs_coeff[i],
689 nmeasurement, MAX_PHS_DELTA);
690 }
691
692 for (im = 0; im < nmeasurement; im++) {
693
694 coeff->iqc_coeff[0] = (coeff->mag_coeff[i][im] & 0x7f) |
695 ((coeff->phs_coeff[i][im] & 0x7f) << 7);
696
697 if ((im % 2) == 0)
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]);
701 else
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]);
705 }
706 }
707
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);
712
713 return;
714
715}
716
717static bool ar9003_hw_tx_iq_cal_run(struct ath_hw *ah)
718{
719 struct ath_common *common = ath9k_hw_common(ah);
720 u8 tx_gain_forced;
721
722 tx_gain_forced = REG_READ_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
723 AR_PHY_TXGAIN_FORCE);
724 if (tx_gain_forced)
725 REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
726 AR_PHY_TXGAIN_FORCE, 0);
727
728 REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_START,
729 AR_PHY_TX_IQCAL_START_DO_CAL, 1);
730
731 if (!ath9k_hw_wait(ah, AR_PHY_TX_IQCAL_START,
732 AR_PHY_TX_IQCAL_START_DO_CAL, 0,
733 AH_WAIT_TIMEOUT)) {
734 ath_dbg(common, ATH_DBG_CALIBRATE,
735 "Tx IQ Cal is not completed.\n");
736 return false;
737 }
738 return true;
739}
740
741static void ar9003_hw_tx_iq_cal_post_proc(struct ath_hw *ah)
742{
743 struct ath_common *common = ath9k_hw_common(ah);
744 const u32 txiqcal_status[AR9300_MAX_CHAINS] = {
745 AR_PHY_TX_IQCAL_STATUS_B0,
746 AR_PHY_TX_IQCAL_STATUS_B1,
747 AR_PHY_TX_IQCAL_STATUS_B2,
748 };
749 const u_int32_t chan_info_tab[] = {
750 AR_PHY_CHAN_INFO_TAB_0,
751 AR_PHY_CHAN_INFO_TAB_1,
752 AR_PHY_CHAN_INFO_TAB_2,
753 };
754 struct coeff coeff;
755 s32 iq_res[6];
756 u8 num_chains = 0;
757 int i, im, j;
758 int nmeasurement;
759
760 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
761 if (ah->txchainmask & (1 << i))
762 num_chains++;
763 }
764
765 for (i = 0; i < num_chains; i++) {
766 nmeasurement = REG_READ_FIELD(ah,
767 AR_PHY_TX_IQCAL_STATUS_B0,
768 AR_PHY_CALIBRATED_GAINS_0);
769 if (nmeasurement > MAX_MEASUREMENT)
770 nmeasurement = MAX_MEASUREMENT;
771
772 for (im = 0; im < nmeasurement; im++) {
773 ath_dbg(common, ATH_DBG_CALIBRATE,
774 "Doing Tx IQ Cal for chain %d.\n", i);
775
776 if (REG_READ(ah, txiqcal_status[i]) &
777 AR_PHY_TX_IQCAL_STATUS_FAILED) {
778 ath_dbg(common, ATH_DBG_CALIBRATE,
779 "Tx IQ Cal failed for chain %d.\n", i);
780 goto tx_iqcal_fail;
781 }
782
783 for (j = 0; j < 3; j++) {
784 u32 idx = 2 * j, offset = 4 * (3 * im + j);
785
786 REG_RMW_FIELD(ah,
787 AR_PHY_CHAN_INFO_MEMORY,
788 AR_PHY_CHAN_INFO_TAB_S2_READ,
789 0);
790
791 /* 32 bits */
792 iq_res[idx] = REG_READ(ah,
793 chan_info_tab[i] +
794 offset);
795
796 REG_RMW_FIELD(ah,
797 AR_PHY_CHAN_INFO_MEMORY,
798 AR_PHY_CHAN_INFO_TAB_S2_READ,
799 1);
800
801 /* 16 bits */
802 iq_res[idx + 1] = 0xffff & REG_READ(ah,
803 chan_info_tab[i] + offset);
804
805 ath_dbg(common, ATH_DBG_CALIBRATE,
806 "IQ RES[%d]=0x%x"
807 "IQ_RES[%d]=0x%x\n",
808 idx, iq_res[idx], idx + 1,
809 iq_res[idx + 1]);
810 }
811
812 if (!ar9003_hw_calc_iq_corr(ah, i, iq_res,
813 coeff.iqc_coeff)) {
814 ath_dbg(common, ATH_DBG_CALIBRATE,
815 "Failed in calculation of \
816 IQ correction.\n");
817 goto tx_iqcal_fail;
818 }
819
820 coeff.mag_coeff[i][im] = coeff.iqc_coeff[0] & 0x7f;
821 coeff.phs_coeff[i][im] =
822 (coeff.iqc_coeff[0] >> 7) & 0x7f;
823
824 if (coeff.mag_coeff[i][im] > 63)
825 coeff.mag_coeff[i][im] -= 128;
826 if (coeff.phs_coeff[i][im] > 63)
827 coeff.phs_coeff[i][im] -= 128;
828 }
829 }
830 ar9003_hw_tx_iqcal_load_avg_2_passes(ah, num_chains, &coeff);
831
832 return;
833
834tx_iqcal_fail:
835 ath_dbg(common, ATH_DBG_CALIBRATE, "Tx IQ Cal failed\n");
836 return;
837}
838static bool ar9003_hw_init_cal(struct ath_hw *ah,
839 struct ath9k_channel *chan)
840{
841 struct ath_common *common = ath9k_hw_common(ah);
842 struct ath9k_hw_capabilities *pCap = &ah->caps;
843 int val;
844 bool txiqcal_done = false;
845
846 val = REG_READ(ah, AR_ENT_OTP);
847 ath_dbg(common, ATH_DBG_CALIBRATE, "ath9k: AR_ENT_OTP 0x%x\n", val);
848
849 /* Configure rx/tx chains before running AGC/TxiQ cals */
850 if (val & AR_ENT_OTP_CHAIN2_DISABLE)
851 ar9003_hw_set_chain_masks(ah, 0x3, 0x3);
852 else
853 ar9003_hw_set_chain_masks(ah, pCap->rx_chainmask,
854 pCap->tx_chainmask);
855
856 /* Do Tx IQ Calibration */
857 REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_1,
858 AR_PHY_TX_IQCAL_CONTROL_1_IQCORR_I_Q_COFF_DELPT,
859 DELPT);
860
861 /*
862 * For AR9485 or later chips, TxIQ cal runs as part of
863 * AGC calibration
864 */
865 if (AR_SREV_9485_OR_LATER(ah))
866 txiqcal_done = true;
867 else {
868 txiqcal_done = ar9003_hw_tx_iq_cal_run(ah);
869 REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_DIS);
870 udelay(5);
871 REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_EN);
872 }
873
874 /* Calibrate the AGC */
875 REG_WRITE(ah, AR_PHY_AGC_CONTROL,
876 REG_READ(ah, AR_PHY_AGC_CONTROL) |
877 AR_PHY_AGC_CONTROL_CAL);
878
879 /* Poll for offset calibration complete */
880 if (!ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL,
881 0, AH_WAIT_TIMEOUT)) {
882 ath_dbg(common, ATH_DBG_CALIBRATE,
883 "offset calibration failed to complete in 1ms; noisy environment?\n");
884 return false;
885 }
886
887 if (txiqcal_done)
888 ar9003_hw_tx_iq_cal_post_proc(ah);
889
890 /* Revert chainmasks to their original values before NF cal */
891 ar9003_hw_set_chain_masks(ah, ah->rxchainmask, ah->txchainmask);
892
893 ath9k_hw_start_nfcal(ah, true);
894
895 /* Initialize list pointers */
896 ah->cal_list = ah->cal_list_last = ah->cal_list_curr = NULL;
897 ah->supp_cals = IQ_MISMATCH_CAL;
898
899 if (ah->supp_cals & IQ_MISMATCH_CAL) {
900 INIT_CAL(&ah->iq_caldata);
901 INSERT_CAL(ah, &ah->iq_caldata);
902 ath_dbg(common, ATH_DBG_CALIBRATE,
903 "enabling IQ Calibration.\n");
904 }
905
906 if (ah->supp_cals & TEMP_COMP_CAL) {
907 INIT_CAL(&ah->tempCompCalData);
908 INSERT_CAL(ah, &ah->tempCompCalData);
909 ath_dbg(common, ATH_DBG_CALIBRATE,
910 "enabling Temperature Compensation Calibration.\n");
911 }
912
913 /* Initialize current pointer to first element in list */
914 ah->cal_list_curr = ah->cal_list;
915
916 if (ah->cal_list_curr)
917 ath9k_hw_reset_calibration(ah, ah->cal_list_curr);
918
919 if (ah->caldata)
920 ah->caldata->CalValid = 0;
921
922 return true;
923}
924
925void ar9003_hw_attach_calib_ops(struct ath_hw *ah)
926{
927 struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah);
928 struct ath_hw_ops *ops = ath9k_hw_ops(ah);
929
930 priv_ops->init_cal_settings = ar9003_hw_init_cal_settings;
931 priv_ops->init_cal = ar9003_hw_init_cal;
932 priv_ops->setup_calibration = ar9003_hw_setup_calibration;
933
934 ops->calibrate = ar9003_hw_calibrate;
935}
1/*
2 * Copyright (c) 2010-2011 Atheros Communications Inc.
3 *
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.
7 *
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.
15 */
16
17#include "hw.h"
18#include "hw-ops.h"
19#include "ar9003_phy.h"
20#include "ar9003_rtt.h"
21#include "ar9003_mci.h"
22
23#define MAX_MEASUREMENT MAX_IQCAL_MEASUREMENT
24#define MAX_MAG_DELTA 11
25#define MAX_PHS_DELTA 10
26#define MAXIQCAL 3
27
28struct coeff {
29 int mag_coeff[AR9300_MAX_CHAINS][MAX_MEASUREMENT][MAXIQCAL];
30 int phs_coeff[AR9300_MAX_CHAINS][MAX_MEASUREMENT][MAXIQCAL];
31 int iqc_coeff[2];
32};
33
34enum ar9003_cal_types {
35 IQ_MISMATCH_CAL = BIT(0),
36};
37
38static void ar9003_hw_setup_calibration(struct ath_hw *ah,
39 struct ath9k_cal_list *currCal)
40{
41 struct ath_common *common = ath9k_hw_common(ah);
42
43 /* Select calibration to run */
44 switch (currCal->calData->calType) {
45 case IQ_MISMATCH_CAL:
46 /*
47 * Start calibration with
48 * 2^(INIT_IQCAL_LOG_COUNT_MAX+1) samples
49 */
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);
54
55 ath_dbg(common, CALIBRATE,
56 "starting IQ Mismatch Calibration\n");
57
58 /* Kick-off cal */
59 REG_SET_BIT(ah, AR_PHY_TIMING4, AR_PHY_TIMING4_DO_CAL);
60 break;
61 default:
62 ath_err(common, "Invalid calibration type\n");
63 break;
64 }
65}
66
67/*
68 * Generic calibration routine.
69 * Recalibrate the lower PHY chips to account for temperature/environment
70 * changes.
71 */
72static bool ar9003_hw_per_calibration(struct ath_hw *ah,
73 struct ath9k_channel *ichan,
74 u8 rxchainmask,
75 struct ath9k_cal_list *currCal)
76{
77 struct ath9k_hw_cal_data *caldata = ah->caldata;
78 const struct ath9k_percal_data *cur_caldata = currCal->calData;
79
80 /* Calibration in progress. */
81 if (currCal->calState == CAL_RUNNING) {
82 /* Check to see if it has finished. */
83 if (REG_READ(ah, AR_PHY_TIMING4) & AR_PHY_TIMING4_DO_CAL)
84 return false;
85
86 /*
87 * Accumulate cal measures for active chains
88 */
89 cur_caldata->calCollect(ah);
90 ah->cal_samples++;
91
92 if (ah->cal_samples >= cur_caldata->calNumSamples) {
93 unsigned int i, numChains = 0;
94 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
95 if (rxchainmask & (1 << i))
96 numChains++;
97 }
98
99 /*
100 * Process accumulated data
101 */
102 cur_caldata->calPostProc(ah, numChains);
103
104 /* Calibration has finished. */
105 caldata->CalValid |= cur_caldata->calType;
106 currCal->calState = CAL_DONE;
107 return true;
108 } else {
109 /*
110 * Set-up collection of another sub-sample until we
111 * get desired number
112 */
113 ar9003_hw_setup_calibration(ah, currCal);
114 }
115 } else if (!(caldata->CalValid & cur_caldata->calType)) {
116 /* If current cal is marked invalid in channel, kick it off */
117 ath9k_hw_reset_calibration(ah, currCal);
118 }
119
120 return false;
121}
122
123static int ar9003_hw_calibrate(struct ath_hw *ah, struct ath9k_channel *chan,
124 u8 rxchainmask, bool longcal)
125{
126 bool iscaldone = true;
127 struct ath9k_cal_list *currCal = ah->cal_list_curr;
128 int ret;
129
130 /*
131 * For given calibration:
132 * 1. Call generic cal routine
133 * 2. When this cal is done (isCalDone) if we have more cals waiting
134 * (eg after reset), mask this to upper layers by not propagating
135 * isCalDone if it is set to TRUE.
136 * Instead, change isCalDone to FALSE and setup the waiting cal(s)
137 * to be run.
138 */
139 if (currCal &&
140 (currCal->calState == CAL_RUNNING ||
141 currCal->calState == CAL_WAITING)) {
142 iscaldone = ar9003_hw_per_calibration(ah, chan,
143 rxchainmask, currCal);
144 if (iscaldone) {
145 ah->cal_list_curr = currCal = currCal->calNext;
146
147 if (currCal->calState == CAL_WAITING) {
148 iscaldone = false;
149 ath9k_hw_reset_calibration(ah, currCal);
150 }
151 }
152 }
153
154 /*
155 * Do NF cal only at longer intervals. Get the value from
156 * the previous NF cal and update history buffer.
157 */
158 if (longcal && ath9k_hw_getnf(ah, chan)) {
159 /*
160 * Load the NF from history buffer of the current channel.
161 * NF is slow time-variant, so it is OK to use a historical
162 * value.
163 */
164 ret = ath9k_hw_loadnf(ah, ah->curchan);
165 if (ret < 0)
166 return ret;
167
168 /* start NF calibration, without updating BB NF register */
169 ath9k_hw_start_nfcal(ah, false);
170 }
171
172 return iscaldone;
173}
174
175static void ar9003_hw_iqcal_collect(struct ath_hw *ah)
176{
177 int i;
178
179 /* Accumulate IQ cal measures for active chains */
180 for (i = 0; i < AR5416_MAX_CHAINS; i++) {
181 if (ah->txchainmask & BIT(i)) {
182 ah->totalPowerMeasI[i] +=
183 REG_READ(ah, AR_PHY_CAL_MEAS_0(i));
184 ah->totalPowerMeasQ[i] +=
185 REG_READ(ah, AR_PHY_CAL_MEAS_1(i));
186 ah->totalIqCorrMeas[i] +=
187 (int32_t) REG_READ(ah, AR_PHY_CAL_MEAS_2(i));
188 ath_dbg(ath9k_hw_common(ah), CALIBRATE,
189 "%d: Chn %d pmi=0x%08x;pmq=0x%08x;iqcm=0x%08x;\n",
190 ah->cal_samples, i, ah->totalPowerMeasI[i],
191 ah->totalPowerMeasQ[i],
192 ah->totalIqCorrMeas[i]);
193 }
194 }
195}
196
197static void ar9003_hw_iqcalibrate(struct ath_hw *ah, u8 numChains)
198{
199 struct ath_common *common = ath9k_hw_common(ah);
200 u32 powerMeasQ, powerMeasI, iqCorrMeas;
201 u32 qCoffDenom, iCoffDenom;
202 int32_t qCoff, iCoff;
203 int iqCorrNeg, i;
204 static const u_int32_t offset_array[3] = {
205 AR_PHY_RX_IQCAL_CORR_B0,
206 AR_PHY_RX_IQCAL_CORR_B1,
207 AR_PHY_RX_IQCAL_CORR_B2,
208 };
209
210 for (i = 0; i < numChains; i++) {
211 powerMeasI = ah->totalPowerMeasI[i];
212 powerMeasQ = ah->totalPowerMeasQ[i];
213 iqCorrMeas = ah->totalIqCorrMeas[i];
214
215 ath_dbg(common, CALIBRATE,
216 "Starting IQ Cal and Correction for Chain %d\n", i);
217
218 ath_dbg(common, CALIBRATE,
219 "Original: Chn %d iq_corr_meas = 0x%08x\n",
220 i, ah->totalIqCorrMeas[i]);
221
222 iqCorrNeg = 0;
223
224 if (iqCorrMeas > 0x80000000) {
225 iqCorrMeas = (0xffffffff - iqCorrMeas) + 1;
226 iqCorrNeg = 1;
227 }
228
229 ath_dbg(common, CALIBRATE, "Chn %d pwr_meas_i = 0x%08x\n",
230 i, powerMeasI);
231 ath_dbg(common, CALIBRATE, "Chn %d pwr_meas_q = 0x%08x\n",
232 i, powerMeasQ);
233 ath_dbg(common, CALIBRATE, "iqCorrNeg is 0x%08x\n", iqCorrNeg);
234
235 iCoffDenom = (powerMeasI / 2 + powerMeasQ / 2) / 256;
236 qCoffDenom = powerMeasQ / 64;
237
238 if ((iCoffDenom != 0) && (qCoffDenom != 0)) {
239 iCoff = iqCorrMeas / iCoffDenom;
240 qCoff = powerMeasI / qCoffDenom - 64;
241 ath_dbg(common, CALIBRATE, "Chn %d iCoff = 0x%08x\n",
242 i, iCoff);
243 ath_dbg(common, CALIBRATE, "Chn %d qCoff = 0x%08x\n",
244 i, qCoff);
245
246 /* Force bounds on iCoff */
247 if (iCoff >= 63)
248 iCoff = 63;
249 else if (iCoff <= -63)
250 iCoff = -63;
251
252 /* Negate iCoff if iqCorrNeg == 0 */
253 if (iqCorrNeg == 0x0)
254 iCoff = -iCoff;
255
256 /* Force bounds on qCoff */
257 if (qCoff >= 63)
258 qCoff = 63;
259 else if (qCoff <= -63)
260 qCoff = -63;
261
262 iCoff = iCoff & 0x7f;
263 qCoff = qCoff & 0x7f;
264
265 ath_dbg(common, CALIBRATE,
266 "Chn %d : iCoff = 0x%x qCoff = 0x%x\n",
267 i, iCoff, qCoff);
268 ath_dbg(common, CALIBRATE,
269 "Register offset (0x%04x) before update = 0x%x\n",
270 offset_array[i],
271 REG_READ(ah, offset_array[i]));
272
273 if (AR_SREV_9565(ah) &&
274 (iCoff == 63 || qCoff == 63 ||
275 iCoff == -63 || qCoff == -63))
276 return;
277
278 REG_RMW_FIELD(ah, offset_array[i],
279 AR_PHY_RX_IQCAL_CORR_IQCORR_Q_I_COFF,
280 iCoff);
281 REG_RMW_FIELD(ah, offset_array[i],
282 AR_PHY_RX_IQCAL_CORR_IQCORR_Q_Q_COFF,
283 qCoff);
284 ath_dbg(common, CALIBRATE,
285 "Register offset (0x%04x) QI COFF (bitfields 0x%08x) after update = 0x%x\n",
286 offset_array[i],
287 AR_PHY_RX_IQCAL_CORR_IQCORR_Q_I_COFF,
288 REG_READ(ah, offset_array[i]));
289 ath_dbg(common, CALIBRATE,
290 "Register offset (0x%04x) QQ COFF (bitfields 0x%08x) after update = 0x%x\n",
291 offset_array[i],
292 AR_PHY_RX_IQCAL_CORR_IQCORR_Q_Q_COFF,
293 REG_READ(ah, offset_array[i]));
294
295 ath_dbg(common, CALIBRATE,
296 "IQ Cal and Correction done for Chain %d\n", i);
297 }
298 }
299
300 REG_SET_BIT(ah, AR_PHY_RX_IQCAL_CORR_B0,
301 AR_PHY_RX_IQCAL_CORR_IQCORR_ENABLE);
302 ath_dbg(common, CALIBRATE,
303 "IQ Cal and Correction (offset 0x%04x) enabled (bit position 0x%08x). New Value 0x%08x\n",
304 (unsigned) (AR_PHY_RX_IQCAL_CORR_B0),
305 AR_PHY_RX_IQCAL_CORR_IQCORR_ENABLE,
306 REG_READ(ah, AR_PHY_RX_IQCAL_CORR_B0));
307}
308
309static const struct ath9k_percal_data iq_cal_single_sample = {
310 IQ_MISMATCH_CAL,
311 MIN_CAL_SAMPLES,
312 PER_MAX_LOG_COUNT,
313 ar9003_hw_iqcal_collect,
314 ar9003_hw_iqcalibrate
315};
316
317static void ar9003_hw_init_cal_settings(struct ath_hw *ah)
318{
319 ah->iq_caldata.calData = &iq_cal_single_sample;
320
321 if (AR_SREV_9300_20_OR_LATER(ah)) {
322 ah->enabled_cals |= TX_IQ_CAL;
323 if (AR_SREV_9485_OR_LATER(ah) && !AR_SREV_9340(ah))
324 ah->enabled_cals |= TX_IQ_ON_AGC_CAL;
325 }
326
327 ah->supp_cals = IQ_MISMATCH_CAL;
328}
329
330#define OFF_UPPER_LT 24
331#define OFF_LOWER_LT 7
332
333static bool ar9003_hw_dynamic_osdac_selection(struct ath_hw *ah,
334 bool txiqcal_done)
335{
336 struct ath_common *common = ath9k_hw_common(ah);
337 int ch0_done, osdac_ch0, dc_off_ch0_i1, dc_off_ch0_q1, dc_off_ch0_i2,
338 dc_off_ch0_q2, dc_off_ch0_i3, dc_off_ch0_q3;
339 int ch1_done, osdac_ch1, dc_off_ch1_i1, dc_off_ch1_q1, dc_off_ch1_i2,
340 dc_off_ch1_q2, dc_off_ch1_i3, dc_off_ch1_q3;
341 int ch2_done, osdac_ch2, dc_off_ch2_i1, dc_off_ch2_q1, dc_off_ch2_i2,
342 dc_off_ch2_q2, dc_off_ch2_i3, dc_off_ch2_q3;
343 bool status;
344 u32 temp, val;
345
346 /*
347 * Clear offset and IQ calibration, run AGC cal.
348 */
349 REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL,
350 AR_PHY_AGC_CONTROL_OFFSET_CAL);
351 REG_CLR_BIT(ah, AR_PHY_TX_IQCAL_CONTROL_0,
352 AR_PHY_TX_IQCAL_CONTROL_0_ENABLE_TXIQ_CAL);
353 REG_WRITE(ah, AR_PHY_AGC_CONTROL,
354 REG_READ(ah, AR_PHY_AGC_CONTROL) | AR_PHY_AGC_CONTROL_CAL);
355
356 status = ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL,
357 AR_PHY_AGC_CONTROL_CAL,
358 0, AH_WAIT_TIMEOUT);
359 if (!status) {
360 ath_dbg(common, CALIBRATE,
361 "AGC cal without offset cal failed to complete in 1ms");
362 return false;
363 }
364
365 /*
366 * Allow only offset calibration and disable the others
367 * (Carrier Leak calibration, TX Filter calibration and
368 * Peak Detector offset calibration).
369 */
370 REG_SET_BIT(ah, AR_PHY_AGC_CONTROL,
371 AR_PHY_AGC_CONTROL_OFFSET_CAL);
372 REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL,
373 AR_PHY_CL_CAL_ENABLE);
374 REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL,
375 AR_PHY_AGC_CONTROL_FLTR_CAL);
376 REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL,
377 AR_PHY_AGC_CONTROL_PKDET_CAL);
378
379 ch0_done = 0;
380 ch1_done = 0;
381 ch2_done = 0;
382
383 while ((ch0_done == 0) || (ch1_done == 0) || (ch2_done == 0)) {
384 osdac_ch0 = (REG_READ(ah, AR_PHY_65NM_CH0_BB1) >> 30) & 0x3;
385 osdac_ch1 = (REG_READ(ah, AR_PHY_65NM_CH1_BB1) >> 30) & 0x3;
386 osdac_ch2 = (REG_READ(ah, AR_PHY_65NM_CH2_BB1) >> 30) & 0x3;
387
388 REG_SET_BIT(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_EN);
389
390 REG_WRITE(ah, AR_PHY_AGC_CONTROL,
391 REG_READ(ah, AR_PHY_AGC_CONTROL) | AR_PHY_AGC_CONTROL_CAL);
392
393 status = ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL,
394 AR_PHY_AGC_CONTROL_CAL,
395 0, AH_WAIT_TIMEOUT);
396 if (!status) {
397 ath_dbg(common, CALIBRATE,
398 "DC offset cal failed to complete in 1ms");
399 return false;
400 }
401
402 REG_CLR_BIT(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_EN);
403
404 /*
405 * High gain.
406 */
407 REG_WRITE(ah, AR_PHY_65NM_CH0_BB3,
408 ((REG_READ(ah, AR_PHY_65NM_CH0_BB3) & 0xfffffcff) | (1 << 8)));
409 REG_WRITE(ah, AR_PHY_65NM_CH1_BB3,
410 ((REG_READ(ah, AR_PHY_65NM_CH1_BB3) & 0xfffffcff) | (1 << 8)));
411 REG_WRITE(ah, AR_PHY_65NM_CH2_BB3,
412 ((REG_READ(ah, AR_PHY_65NM_CH2_BB3) & 0xfffffcff) | (1 << 8)));
413
414 temp = REG_READ(ah, AR_PHY_65NM_CH0_BB3);
415 dc_off_ch0_i1 = (temp >> 26) & 0x1f;
416 dc_off_ch0_q1 = (temp >> 21) & 0x1f;
417
418 temp = REG_READ(ah, AR_PHY_65NM_CH1_BB3);
419 dc_off_ch1_i1 = (temp >> 26) & 0x1f;
420 dc_off_ch1_q1 = (temp >> 21) & 0x1f;
421
422 temp = REG_READ(ah, AR_PHY_65NM_CH2_BB3);
423 dc_off_ch2_i1 = (temp >> 26) & 0x1f;
424 dc_off_ch2_q1 = (temp >> 21) & 0x1f;
425
426 /*
427 * Low gain.
428 */
429 REG_WRITE(ah, AR_PHY_65NM_CH0_BB3,
430 ((REG_READ(ah, AR_PHY_65NM_CH0_BB3) & 0xfffffcff) | (2 << 8)));
431 REG_WRITE(ah, AR_PHY_65NM_CH1_BB3,
432 ((REG_READ(ah, AR_PHY_65NM_CH1_BB3) & 0xfffffcff) | (2 << 8)));
433 REG_WRITE(ah, AR_PHY_65NM_CH2_BB3,
434 ((REG_READ(ah, AR_PHY_65NM_CH2_BB3) & 0xfffffcff) | (2 << 8)));
435
436 temp = REG_READ(ah, AR_PHY_65NM_CH0_BB3);
437 dc_off_ch0_i2 = (temp >> 26) & 0x1f;
438 dc_off_ch0_q2 = (temp >> 21) & 0x1f;
439
440 temp = REG_READ(ah, AR_PHY_65NM_CH1_BB3);
441 dc_off_ch1_i2 = (temp >> 26) & 0x1f;
442 dc_off_ch1_q2 = (temp >> 21) & 0x1f;
443
444 temp = REG_READ(ah, AR_PHY_65NM_CH2_BB3);
445 dc_off_ch2_i2 = (temp >> 26) & 0x1f;
446 dc_off_ch2_q2 = (temp >> 21) & 0x1f;
447
448 /*
449 * Loopback.
450 */
451 REG_WRITE(ah, AR_PHY_65NM_CH0_BB3,
452 ((REG_READ(ah, AR_PHY_65NM_CH0_BB3) & 0xfffffcff) | (3 << 8)));
453 REG_WRITE(ah, AR_PHY_65NM_CH1_BB3,
454 ((REG_READ(ah, AR_PHY_65NM_CH1_BB3) & 0xfffffcff) | (3 << 8)));
455 REG_WRITE(ah, AR_PHY_65NM_CH2_BB3,
456 ((REG_READ(ah, AR_PHY_65NM_CH2_BB3) & 0xfffffcff) | (3 << 8)));
457
458 temp = REG_READ(ah, AR_PHY_65NM_CH0_BB3);
459 dc_off_ch0_i3 = (temp >> 26) & 0x1f;
460 dc_off_ch0_q3 = (temp >> 21) & 0x1f;
461
462 temp = REG_READ(ah, AR_PHY_65NM_CH1_BB3);
463 dc_off_ch1_i3 = (temp >> 26) & 0x1f;
464 dc_off_ch1_q3 = (temp >> 21) & 0x1f;
465
466 temp = REG_READ(ah, AR_PHY_65NM_CH2_BB3);
467 dc_off_ch2_i3 = (temp >> 26) & 0x1f;
468 dc_off_ch2_q3 = (temp >> 21) & 0x1f;
469
470 if ((dc_off_ch0_i1 > OFF_UPPER_LT) || (dc_off_ch0_i1 < OFF_LOWER_LT) ||
471 (dc_off_ch0_i2 > OFF_UPPER_LT) || (dc_off_ch0_i2 < OFF_LOWER_LT) ||
472 (dc_off_ch0_i3 > OFF_UPPER_LT) || (dc_off_ch0_i3 < OFF_LOWER_LT) ||
473 (dc_off_ch0_q1 > OFF_UPPER_LT) || (dc_off_ch0_q1 < OFF_LOWER_LT) ||
474 (dc_off_ch0_q2 > OFF_UPPER_LT) || (dc_off_ch0_q2 < OFF_LOWER_LT) ||
475 (dc_off_ch0_q3 > OFF_UPPER_LT) || (dc_off_ch0_q3 < OFF_LOWER_LT)) {
476 if (osdac_ch0 == 3) {
477 ch0_done = 1;
478 } else {
479 osdac_ch0++;
480
481 val = REG_READ(ah, AR_PHY_65NM_CH0_BB1) & 0x3fffffff;
482 val |= (osdac_ch0 << 30);
483 REG_WRITE(ah, AR_PHY_65NM_CH0_BB1, val);
484
485 ch0_done = 0;
486 }
487 } else {
488 ch0_done = 1;
489 }
490
491 if ((dc_off_ch1_i1 > OFF_UPPER_LT) || (dc_off_ch1_i1 < OFF_LOWER_LT) ||
492 (dc_off_ch1_i2 > OFF_UPPER_LT) || (dc_off_ch1_i2 < OFF_LOWER_LT) ||
493 (dc_off_ch1_i3 > OFF_UPPER_LT) || (dc_off_ch1_i3 < OFF_LOWER_LT) ||
494 (dc_off_ch1_q1 > OFF_UPPER_LT) || (dc_off_ch1_q1 < OFF_LOWER_LT) ||
495 (dc_off_ch1_q2 > OFF_UPPER_LT) || (dc_off_ch1_q2 < OFF_LOWER_LT) ||
496 (dc_off_ch1_q3 > OFF_UPPER_LT) || (dc_off_ch1_q3 < OFF_LOWER_LT)) {
497 if (osdac_ch1 == 3) {
498 ch1_done = 1;
499 } else {
500 osdac_ch1++;
501
502 val = REG_READ(ah, AR_PHY_65NM_CH1_BB1) & 0x3fffffff;
503 val |= (osdac_ch1 << 30);
504 REG_WRITE(ah, AR_PHY_65NM_CH1_BB1, val);
505
506 ch1_done = 0;
507 }
508 } else {
509 ch1_done = 1;
510 }
511
512 if ((dc_off_ch2_i1 > OFF_UPPER_LT) || (dc_off_ch2_i1 < OFF_LOWER_LT) ||
513 (dc_off_ch2_i2 > OFF_UPPER_LT) || (dc_off_ch2_i2 < OFF_LOWER_LT) ||
514 (dc_off_ch2_i3 > OFF_UPPER_LT) || (dc_off_ch2_i3 < OFF_LOWER_LT) ||
515 (dc_off_ch2_q1 > OFF_UPPER_LT) || (dc_off_ch2_q1 < OFF_LOWER_LT) ||
516 (dc_off_ch2_q2 > OFF_UPPER_LT) || (dc_off_ch2_q2 < OFF_LOWER_LT) ||
517 (dc_off_ch2_q3 > OFF_UPPER_LT) || (dc_off_ch2_q3 < OFF_LOWER_LT)) {
518 if (osdac_ch2 == 3) {
519 ch2_done = 1;
520 } else {
521 osdac_ch2++;
522
523 val = REG_READ(ah, AR_PHY_65NM_CH2_BB1) & 0x3fffffff;
524 val |= (osdac_ch2 << 30);
525 REG_WRITE(ah, AR_PHY_65NM_CH2_BB1, val);
526
527 ch2_done = 0;
528 }
529 } else {
530 ch2_done = 1;
531 }
532 }
533
534 REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL,
535 AR_PHY_AGC_CONTROL_OFFSET_CAL);
536 REG_SET_BIT(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_EN);
537
538 /*
539 * We don't need to check txiqcal_done here since it is always
540 * set for AR9550.
541 */
542 REG_SET_BIT(ah, AR_PHY_TX_IQCAL_CONTROL_0,
543 AR_PHY_TX_IQCAL_CONTROL_0_ENABLE_TXIQ_CAL);
544
545 return true;
546}
547
548/*
549 * solve 4x4 linear equation used in loopback iq cal.
550 */
551static bool ar9003_hw_solve_iq_cal(struct ath_hw *ah,
552 s32 sin_2phi_1,
553 s32 cos_2phi_1,
554 s32 sin_2phi_2,
555 s32 cos_2phi_2,
556 s32 mag_a0_d0,
557 s32 phs_a0_d0,
558 s32 mag_a1_d0,
559 s32 phs_a1_d0,
560 s32 solved_eq[])
561{
562 s32 f1 = cos_2phi_1 - cos_2phi_2,
563 f3 = sin_2phi_1 - sin_2phi_2,
564 f2;
565 s32 mag_tx, phs_tx, mag_rx, phs_rx;
566 const s32 result_shift = 1 << 15;
567 struct ath_common *common = ath9k_hw_common(ah);
568
569 f2 = ((f1 >> 3) * (f1 >> 3) + (f3 >> 3) * (f3 >> 3)) >> 9;
570
571 if (!f2) {
572 ath_dbg(common, CALIBRATE, "Divide by 0\n");
573 return false;
574 }
575
576 /* mag mismatch, tx */
577 mag_tx = f1 * (mag_a0_d0 - mag_a1_d0) + f3 * (phs_a0_d0 - phs_a1_d0);
578 /* phs mismatch, tx */
579 phs_tx = f3 * (-mag_a0_d0 + mag_a1_d0) + f1 * (phs_a0_d0 - phs_a1_d0);
580
581 mag_tx = (mag_tx / f2);
582 phs_tx = (phs_tx / f2);
583
584 /* mag mismatch, rx */
585 mag_rx = mag_a0_d0 - (cos_2phi_1 * mag_tx + sin_2phi_1 * phs_tx) /
586 result_shift;
587 /* phs mismatch, rx */
588 phs_rx = phs_a0_d0 + (sin_2phi_1 * mag_tx - cos_2phi_1 * phs_tx) /
589 result_shift;
590
591 solved_eq[0] = mag_tx;
592 solved_eq[1] = phs_tx;
593 solved_eq[2] = mag_rx;
594 solved_eq[3] = phs_rx;
595
596 return true;
597}
598
599static s32 ar9003_hw_find_mag_approx(struct ath_hw *ah, s32 in_re, s32 in_im)
600{
601 s32 abs_i = abs(in_re),
602 abs_q = abs(in_im),
603 max_abs, min_abs;
604
605 if (abs_i > abs_q) {
606 max_abs = abs_i;
607 min_abs = abs_q;
608 } else {
609 max_abs = abs_q;
610 min_abs = abs_i;
611 }
612
613 return max_abs - (max_abs / 32) + (min_abs / 8) + (min_abs / 4);
614}
615
616#define DELPT 32
617
618static bool ar9003_hw_calc_iq_corr(struct ath_hw *ah,
619 s32 chain_idx,
620 const s32 iq_res[],
621 s32 iqc_coeff[])
622{
623 s32 i2_m_q2_a0_d0, i2_p_q2_a0_d0, iq_corr_a0_d0,
624 i2_m_q2_a0_d1, i2_p_q2_a0_d1, iq_corr_a0_d1,
625 i2_m_q2_a1_d0, i2_p_q2_a1_d0, iq_corr_a1_d0,
626 i2_m_q2_a1_d1, i2_p_q2_a1_d1, iq_corr_a1_d1;
627 s32 mag_a0_d0, mag_a1_d0, mag_a0_d1, mag_a1_d1,
628 phs_a0_d0, phs_a1_d0, phs_a0_d1, phs_a1_d1,
629 sin_2phi_1, cos_2phi_1,
630 sin_2phi_2, cos_2phi_2;
631 s32 mag_tx, phs_tx, mag_rx, phs_rx;
632 s32 solved_eq[4], mag_corr_tx, phs_corr_tx, mag_corr_rx, phs_corr_rx,
633 q_q_coff, q_i_coff;
634 const s32 res_scale = 1 << 15;
635 const s32 delpt_shift = 1 << 8;
636 s32 mag1, mag2;
637 struct ath_common *common = ath9k_hw_common(ah);
638
639 i2_m_q2_a0_d0 = iq_res[0] & 0xfff;
640 i2_p_q2_a0_d0 = (iq_res[0] >> 12) & 0xfff;
641 iq_corr_a0_d0 = ((iq_res[0] >> 24) & 0xff) + ((iq_res[1] & 0xf) << 8);
642
643 if (i2_m_q2_a0_d0 > 0x800)
644 i2_m_q2_a0_d0 = -((0xfff - i2_m_q2_a0_d0) + 1);
645
646 if (i2_p_q2_a0_d0 > 0x800)
647 i2_p_q2_a0_d0 = -((0xfff - i2_p_q2_a0_d0) + 1);
648
649 if (iq_corr_a0_d0 > 0x800)
650 iq_corr_a0_d0 = -((0xfff - iq_corr_a0_d0) + 1);
651
652 i2_m_q2_a0_d1 = (iq_res[1] >> 4) & 0xfff;
653 i2_p_q2_a0_d1 = (iq_res[2] & 0xfff);
654 iq_corr_a0_d1 = (iq_res[2] >> 12) & 0xfff;
655
656 if (i2_m_q2_a0_d1 > 0x800)
657 i2_m_q2_a0_d1 = -((0xfff - i2_m_q2_a0_d1) + 1);
658
659 if (iq_corr_a0_d1 > 0x800)
660 iq_corr_a0_d1 = -((0xfff - iq_corr_a0_d1) + 1);
661
662 i2_m_q2_a1_d0 = ((iq_res[2] >> 24) & 0xff) + ((iq_res[3] & 0xf) << 8);
663 i2_p_q2_a1_d0 = (iq_res[3] >> 4) & 0xfff;
664 iq_corr_a1_d0 = iq_res[4] & 0xfff;
665
666 if (i2_m_q2_a1_d0 > 0x800)
667 i2_m_q2_a1_d0 = -((0xfff - i2_m_q2_a1_d0) + 1);
668
669 if (i2_p_q2_a1_d0 > 0x800)
670 i2_p_q2_a1_d0 = -((0xfff - i2_p_q2_a1_d0) + 1);
671
672 if (iq_corr_a1_d0 > 0x800)
673 iq_corr_a1_d0 = -((0xfff - iq_corr_a1_d0) + 1);
674
675 i2_m_q2_a1_d1 = (iq_res[4] >> 12) & 0xfff;
676 i2_p_q2_a1_d1 = ((iq_res[4] >> 24) & 0xff) + ((iq_res[5] & 0xf) << 8);
677 iq_corr_a1_d1 = (iq_res[5] >> 4) & 0xfff;
678
679 if (i2_m_q2_a1_d1 > 0x800)
680 i2_m_q2_a1_d1 = -((0xfff - i2_m_q2_a1_d1) + 1);
681
682 if (i2_p_q2_a1_d1 > 0x800)
683 i2_p_q2_a1_d1 = -((0xfff - i2_p_q2_a1_d1) + 1);
684
685 if (iq_corr_a1_d1 > 0x800)
686 iq_corr_a1_d1 = -((0xfff - iq_corr_a1_d1) + 1);
687
688 if ((i2_p_q2_a0_d0 == 0) || (i2_p_q2_a0_d1 == 0) ||
689 (i2_p_q2_a1_d0 == 0) || (i2_p_q2_a1_d1 == 0)) {
690 ath_dbg(common, CALIBRATE,
691 "Divide by 0:\n"
692 "a0_d0=%d\n"
693 "a0_d1=%d\n"
694 "a2_d0=%d\n"
695 "a1_d1=%d\n",
696 i2_p_q2_a0_d0, i2_p_q2_a0_d1,
697 i2_p_q2_a1_d0, i2_p_q2_a1_d1);
698 return false;
699 }
700
701 if ((i2_p_q2_a0_d0 < 1024) || (i2_p_q2_a0_d0 > 2047) ||
702 (i2_p_q2_a1_d0 < 0) || (i2_p_q2_a1_d1 < 0) ||
703 (i2_p_q2_a0_d0 <= i2_m_q2_a0_d0) ||
704 (i2_p_q2_a0_d0 <= iq_corr_a0_d0) ||
705 (i2_p_q2_a0_d1 <= i2_m_q2_a0_d1) ||
706 (i2_p_q2_a0_d1 <= iq_corr_a0_d1) ||
707 (i2_p_q2_a1_d0 <= i2_m_q2_a1_d0) ||
708 (i2_p_q2_a1_d0 <= iq_corr_a1_d0) ||
709 (i2_p_q2_a1_d1 <= i2_m_q2_a1_d1) ||
710 (i2_p_q2_a1_d1 <= iq_corr_a1_d1)) {
711 return false;
712 }
713
714 mag_a0_d0 = (i2_m_q2_a0_d0 * res_scale) / i2_p_q2_a0_d0;
715 phs_a0_d0 = (iq_corr_a0_d0 * res_scale) / i2_p_q2_a0_d0;
716
717 mag_a0_d1 = (i2_m_q2_a0_d1 * res_scale) / i2_p_q2_a0_d1;
718 phs_a0_d1 = (iq_corr_a0_d1 * res_scale) / i2_p_q2_a0_d1;
719
720 mag_a1_d0 = (i2_m_q2_a1_d0 * res_scale) / i2_p_q2_a1_d0;
721 phs_a1_d0 = (iq_corr_a1_d0 * res_scale) / i2_p_q2_a1_d0;
722
723 mag_a1_d1 = (i2_m_q2_a1_d1 * res_scale) / i2_p_q2_a1_d1;
724 phs_a1_d1 = (iq_corr_a1_d1 * res_scale) / i2_p_q2_a1_d1;
725
726 /* w/o analog phase shift */
727 sin_2phi_1 = (((mag_a0_d0 - mag_a0_d1) * delpt_shift) / DELPT);
728 /* w/o analog phase shift */
729 cos_2phi_1 = (((phs_a0_d1 - phs_a0_d0) * delpt_shift) / DELPT);
730 /* w/ analog phase shift */
731 sin_2phi_2 = (((mag_a1_d0 - mag_a1_d1) * delpt_shift) / DELPT);
732 /* w/ analog phase shift */
733 cos_2phi_2 = (((phs_a1_d1 - phs_a1_d0) * delpt_shift) / DELPT);
734
735 /*
736 * force sin^2 + cos^2 = 1;
737 * find magnitude by approximation
738 */
739 mag1 = ar9003_hw_find_mag_approx(ah, cos_2phi_1, sin_2phi_1);
740 mag2 = ar9003_hw_find_mag_approx(ah, cos_2phi_2, sin_2phi_2);
741
742 if ((mag1 == 0) || (mag2 == 0)) {
743 ath_dbg(common, CALIBRATE, "Divide by 0: mag1=%d, mag2=%d\n",
744 mag1, mag2);
745 return false;
746 }
747
748 /* normalization sin and cos by mag */
749 sin_2phi_1 = (sin_2phi_1 * res_scale / mag1);
750 cos_2phi_1 = (cos_2phi_1 * res_scale / mag1);
751 sin_2phi_2 = (sin_2phi_2 * res_scale / mag2);
752 cos_2phi_2 = (cos_2phi_2 * res_scale / mag2);
753
754 /* calculate IQ mismatch */
755 if (!ar9003_hw_solve_iq_cal(ah,
756 sin_2phi_1, cos_2phi_1,
757 sin_2phi_2, cos_2phi_2,
758 mag_a0_d0, phs_a0_d0,
759 mag_a1_d0,
760 phs_a1_d0, solved_eq)) {
761 ath_dbg(common, CALIBRATE,
762 "Call to ar9003_hw_solve_iq_cal() failed\n");
763 return false;
764 }
765
766 mag_tx = solved_eq[0];
767 phs_tx = solved_eq[1];
768 mag_rx = solved_eq[2];
769 phs_rx = solved_eq[3];
770
771 ath_dbg(common, CALIBRATE,
772 "chain %d: mag mismatch=%d phase mismatch=%d\n",
773 chain_idx, mag_tx/res_scale, phs_tx/res_scale);
774
775 if (res_scale == mag_tx) {
776 ath_dbg(common, CALIBRATE,
777 "Divide by 0: mag_tx=%d, res_scale=%d\n",
778 mag_tx, res_scale);
779 return false;
780 }
781
782 /* calculate and quantize Tx IQ correction factor */
783 mag_corr_tx = (mag_tx * res_scale) / (res_scale - mag_tx);
784 phs_corr_tx = -phs_tx;
785
786 q_q_coff = (mag_corr_tx * 128 / res_scale);
787 q_i_coff = (phs_corr_tx * 256 / res_scale);
788
789 ath_dbg(common, CALIBRATE, "tx chain %d: mag corr=%d phase corr=%d\n",
790 chain_idx, q_q_coff, q_i_coff);
791
792 if (q_i_coff < -63)
793 q_i_coff = -63;
794 if (q_i_coff > 63)
795 q_i_coff = 63;
796 if (q_q_coff < -63)
797 q_q_coff = -63;
798 if (q_q_coff > 63)
799 q_q_coff = 63;
800
801 iqc_coeff[0] = (q_q_coff * 128) + (0x7f & q_i_coff);
802
803 ath_dbg(common, CALIBRATE, "tx chain %d: iq corr coeff=%x\n",
804 chain_idx, iqc_coeff[0]);
805
806 if (-mag_rx == res_scale) {
807 ath_dbg(common, CALIBRATE,
808 "Divide by 0: mag_rx=%d, res_scale=%d\n",
809 mag_rx, res_scale);
810 return false;
811 }
812
813 /* calculate and quantize Rx IQ correction factors */
814 mag_corr_rx = (-mag_rx * res_scale) / (res_scale + mag_rx);
815 phs_corr_rx = -phs_rx;
816
817 q_q_coff = (mag_corr_rx * 128 / res_scale);
818 q_i_coff = (phs_corr_rx * 256 / res_scale);
819
820 ath_dbg(common, CALIBRATE, "rx chain %d: mag corr=%d phase corr=%d\n",
821 chain_idx, q_q_coff, q_i_coff);
822
823 if (q_i_coff < -63)
824 q_i_coff = -63;
825 if (q_i_coff > 63)
826 q_i_coff = 63;
827 if (q_q_coff < -63)
828 q_q_coff = -63;
829 if (q_q_coff > 63)
830 q_q_coff = 63;
831
832 iqc_coeff[1] = (q_q_coff * 128) + (0x7f & q_i_coff);
833
834 ath_dbg(common, CALIBRATE, "rx chain %d: iq corr coeff=%x\n",
835 chain_idx, iqc_coeff[1]);
836
837 return true;
838}
839
840static void ar9003_hw_detect_outlier(int mp_coeff[][MAXIQCAL],
841 int nmeasurement,
842 int max_delta)
843{
844 int mp_max = -64, max_idx = 0;
845 int mp_min = 63, min_idx = 0;
846 int mp_avg = 0, i, outlier_idx = 0, mp_count = 0;
847
848 /* find min/max mismatch across all calibrated gains */
849 for (i = 0; i < nmeasurement; i++) {
850 if (mp_coeff[i][0] > mp_max) {
851 mp_max = mp_coeff[i][0];
852 max_idx = i;
853 } else if (mp_coeff[i][0] < mp_min) {
854 mp_min = mp_coeff[i][0];
855 min_idx = i;
856 }
857 }
858
859 /* find average (exclude max abs value) */
860 for (i = 0; i < nmeasurement; i++) {
861 if ((abs(mp_coeff[i][0]) < abs(mp_max)) ||
862 (abs(mp_coeff[i][0]) < abs(mp_min))) {
863 mp_avg += mp_coeff[i][0];
864 mp_count++;
865 }
866 }
867
868 /*
869 * finding mean magnitude/phase if possible, otherwise
870 * just use the last value as the mean
871 */
872 if (mp_count)
873 mp_avg /= mp_count;
874 else
875 mp_avg = mp_coeff[nmeasurement - 1][0];
876
877 /* detect outlier */
878 if (abs(mp_max - mp_min) > max_delta) {
879 if (abs(mp_max - mp_avg) > abs(mp_min - mp_avg))
880 outlier_idx = max_idx;
881 else
882 outlier_idx = min_idx;
883
884 mp_coeff[outlier_idx][0] = mp_avg;
885 }
886}
887
888static void ar9003_hw_tx_iq_cal_outlier_detection(struct ath_hw *ah,
889 struct coeff *coeff,
890 bool is_reusable)
891{
892 int i, im, nmeasurement;
893 int magnitude, phase;
894 u32 tx_corr_coeff[MAX_MEASUREMENT][AR9300_MAX_CHAINS];
895 struct ath9k_hw_cal_data *caldata = ah->caldata;
896
897 memset(tx_corr_coeff, 0, sizeof(tx_corr_coeff));
898 for (i = 0; i < MAX_MEASUREMENT / 2; i++) {
899 tx_corr_coeff[i * 2][0] = tx_corr_coeff[(i * 2) + 1][0] =
900 AR_PHY_TX_IQCAL_CORR_COEFF_B0(i);
901 if (!AR_SREV_9485(ah)) {
902 tx_corr_coeff[i * 2][1] =
903 tx_corr_coeff[(i * 2) + 1][1] =
904 AR_PHY_TX_IQCAL_CORR_COEFF_B1(i);
905
906 tx_corr_coeff[i * 2][2] =
907 tx_corr_coeff[(i * 2) + 1][2] =
908 AR_PHY_TX_IQCAL_CORR_COEFF_B2(i);
909 }
910 }
911
912 /* Load the average of 2 passes */
913 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
914 if (!(ah->txchainmask & (1 << i)))
915 continue;
916 nmeasurement = REG_READ_FIELD(ah,
917 AR_PHY_TX_IQCAL_STATUS_B0,
918 AR_PHY_CALIBRATED_GAINS_0);
919
920 if (nmeasurement > MAX_MEASUREMENT)
921 nmeasurement = MAX_MEASUREMENT;
922
923 /*
924 * Skip normal outlier detection for AR9550.
925 */
926 if (!AR_SREV_9550(ah)) {
927 /* detect outlier only if nmeasurement > 1 */
928 if (nmeasurement > 1) {
929 /* Detect magnitude outlier */
930 ar9003_hw_detect_outlier(coeff->mag_coeff[i],
931 nmeasurement,
932 MAX_MAG_DELTA);
933
934 /* Detect phase outlier */
935 ar9003_hw_detect_outlier(coeff->phs_coeff[i],
936 nmeasurement,
937 MAX_PHS_DELTA);
938 }
939 }
940
941 for (im = 0; im < nmeasurement; im++) {
942 magnitude = coeff->mag_coeff[i][im][0];
943 phase = coeff->phs_coeff[i][im][0];
944
945 coeff->iqc_coeff[0] =
946 (phase & 0x7f) | ((magnitude & 0x7f) << 7);
947
948 if ((im % 2) == 0)
949 REG_RMW_FIELD(ah, tx_corr_coeff[im][i],
950 AR_PHY_TX_IQCAL_CORR_COEFF_00_COEFF_TABLE,
951 coeff->iqc_coeff[0]);
952 else
953 REG_RMW_FIELD(ah, tx_corr_coeff[im][i],
954 AR_PHY_TX_IQCAL_CORR_COEFF_01_COEFF_TABLE,
955 coeff->iqc_coeff[0]);
956
957 if (caldata)
958 caldata->tx_corr_coeff[im][i] =
959 coeff->iqc_coeff[0];
960 }
961 if (caldata)
962 caldata->num_measures[i] = nmeasurement;
963 }
964
965 REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_3,
966 AR_PHY_TX_IQCAL_CONTROL_3_IQCORR_EN, 0x1);
967 REG_RMW_FIELD(ah, AR_PHY_RX_IQCAL_CORR_B0,
968 AR_PHY_RX_IQCAL_CORR_B0_LOOPBACK_IQCORR_EN, 0x1);
969
970 if (caldata) {
971 if (is_reusable)
972 set_bit(TXIQCAL_DONE, &caldata->cal_flags);
973 else
974 clear_bit(TXIQCAL_DONE, &caldata->cal_flags);
975 }
976
977 return;
978}
979
980static bool ar9003_hw_tx_iq_cal_run(struct ath_hw *ah)
981{
982 struct ath_common *common = ath9k_hw_common(ah);
983 u8 tx_gain_forced;
984
985 tx_gain_forced = REG_READ_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
986 AR_PHY_TXGAIN_FORCE);
987 if (tx_gain_forced)
988 REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
989 AR_PHY_TXGAIN_FORCE, 0);
990
991 REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_START,
992 AR_PHY_TX_IQCAL_START_DO_CAL, 1);
993
994 if (!ath9k_hw_wait(ah, AR_PHY_TX_IQCAL_START,
995 AR_PHY_TX_IQCAL_START_DO_CAL, 0,
996 AH_WAIT_TIMEOUT)) {
997 ath_dbg(common, CALIBRATE, "Tx IQ Cal is not completed\n");
998 return false;
999 }
1000 return true;
1001}
1002
1003static void __ar955x_tx_iq_cal_sort(struct ath_hw *ah,
1004 struct coeff *coeff,
1005 int i, int nmeasurement)
1006{
1007 struct ath_common *common = ath9k_hw_common(ah);
1008 int im, ix, iy, temp;
1009
1010 for (im = 0; im < nmeasurement; im++) {
1011 for (ix = 0; ix < MAXIQCAL - 1; ix++) {
1012 for (iy = ix + 1; iy <= MAXIQCAL - 1; iy++) {
1013 if (coeff->mag_coeff[i][im][iy] <
1014 coeff->mag_coeff[i][im][ix]) {
1015 temp = coeff->mag_coeff[i][im][ix];
1016 coeff->mag_coeff[i][im][ix] =
1017 coeff->mag_coeff[i][im][iy];
1018 coeff->mag_coeff[i][im][iy] = temp;
1019 }
1020 if (coeff->phs_coeff[i][im][iy] <
1021 coeff->phs_coeff[i][im][ix]) {
1022 temp = coeff->phs_coeff[i][im][ix];
1023 coeff->phs_coeff[i][im][ix] =
1024 coeff->phs_coeff[i][im][iy];
1025 coeff->phs_coeff[i][im][iy] = temp;
1026 }
1027 }
1028 }
1029 coeff->mag_coeff[i][im][0] = coeff->mag_coeff[i][im][MAXIQCAL / 2];
1030 coeff->phs_coeff[i][im][0] = coeff->phs_coeff[i][im][MAXIQCAL / 2];
1031
1032 ath_dbg(common, CALIBRATE,
1033 "IQCAL: Median [ch%d][gain%d]: mag = %d phase = %d\n",
1034 i, im,
1035 coeff->mag_coeff[i][im][0],
1036 coeff->phs_coeff[i][im][0]);
1037 }
1038}
1039
1040static bool ar955x_tx_iq_cal_median(struct ath_hw *ah,
1041 struct coeff *coeff,
1042 int iqcal_idx,
1043 int nmeasurement)
1044{
1045 int i;
1046
1047 if ((iqcal_idx + 1) != MAXIQCAL)
1048 return false;
1049
1050 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
1051 __ar955x_tx_iq_cal_sort(ah, coeff, i, nmeasurement);
1052 }
1053
1054 return true;
1055}
1056
1057static void ar9003_hw_tx_iq_cal_post_proc(struct ath_hw *ah,
1058 int iqcal_idx,
1059 bool is_reusable)
1060{
1061 struct ath_common *common = ath9k_hw_common(ah);
1062 const u32 txiqcal_status[AR9300_MAX_CHAINS] = {
1063 AR_PHY_TX_IQCAL_STATUS_B0,
1064 AR_PHY_TX_IQCAL_STATUS_B1,
1065 AR_PHY_TX_IQCAL_STATUS_B2,
1066 };
1067 const u_int32_t chan_info_tab[] = {
1068 AR_PHY_CHAN_INFO_TAB_0,
1069 AR_PHY_CHAN_INFO_TAB_1,
1070 AR_PHY_CHAN_INFO_TAB_2,
1071 };
1072 static struct coeff coeff;
1073 s32 iq_res[6];
1074 int i, im, j;
1075 int nmeasurement = 0;
1076 bool outlier_detect = true;
1077
1078 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
1079 if (!(ah->txchainmask & (1 << i)))
1080 continue;
1081
1082 nmeasurement = REG_READ_FIELD(ah,
1083 AR_PHY_TX_IQCAL_STATUS_B0,
1084 AR_PHY_CALIBRATED_GAINS_0);
1085 if (nmeasurement > MAX_MEASUREMENT)
1086 nmeasurement = MAX_MEASUREMENT;
1087
1088 for (im = 0; im < nmeasurement; im++) {
1089 ath_dbg(common, CALIBRATE,
1090 "Doing Tx IQ Cal for chain %d\n", i);
1091
1092 if (REG_READ(ah, txiqcal_status[i]) &
1093 AR_PHY_TX_IQCAL_STATUS_FAILED) {
1094 ath_dbg(common, CALIBRATE,
1095 "Tx IQ Cal failed for chain %d\n", i);
1096 goto tx_iqcal_fail;
1097 }
1098
1099 for (j = 0; j < 3; j++) {
1100 u32 idx = 2 * j, offset = 4 * (3 * im + j);
1101
1102 REG_RMW_FIELD(ah,
1103 AR_PHY_CHAN_INFO_MEMORY,
1104 AR_PHY_CHAN_INFO_TAB_S2_READ,
1105 0);
1106
1107 /* 32 bits */
1108 iq_res[idx] = REG_READ(ah,
1109 chan_info_tab[i] +
1110 offset);
1111
1112 REG_RMW_FIELD(ah,
1113 AR_PHY_CHAN_INFO_MEMORY,
1114 AR_PHY_CHAN_INFO_TAB_S2_READ,
1115 1);
1116
1117 /* 16 bits */
1118 iq_res[idx + 1] = 0xffff & REG_READ(ah,
1119 chan_info_tab[i] + offset);
1120
1121 ath_dbg(common, CALIBRATE,
1122 "IQ_RES[%d]=0x%x IQ_RES[%d]=0x%x\n",
1123 idx, iq_res[idx], idx + 1,
1124 iq_res[idx + 1]);
1125 }
1126
1127 if (!ar9003_hw_calc_iq_corr(ah, i, iq_res,
1128 coeff.iqc_coeff)) {
1129 ath_dbg(common, CALIBRATE,
1130 "Failed in calculation of IQ correction\n");
1131 goto tx_iqcal_fail;
1132 }
1133
1134 coeff.phs_coeff[i][im][iqcal_idx] =
1135 coeff.iqc_coeff[0] & 0x7f;
1136 coeff.mag_coeff[i][im][iqcal_idx] =
1137 (coeff.iqc_coeff[0] >> 7) & 0x7f;
1138
1139 if (coeff.mag_coeff[i][im][iqcal_idx] > 63)
1140 coeff.mag_coeff[i][im][iqcal_idx] -= 128;
1141 if (coeff.phs_coeff[i][im][iqcal_idx] > 63)
1142 coeff.phs_coeff[i][im][iqcal_idx] -= 128;
1143 }
1144 }
1145
1146 if (AR_SREV_9550(ah))
1147 outlier_detect = ar955x_tx_iq_cal_median(ah, &coeff,
1148 iqcal_idx, nmeasurement);
1149 if (outlier_detect)
1150 ar9003_hw_tx_iq_cal_outlier_detection(ah, &coeff, is_reusable);
1151
1152 return;
1153
1154tx_iqcal_fail:
1155 ath_dbg(common, CALIBRATE, "Tx IQ Cal failed\n");
1156 return;
1157}
1158
1159static void ar9003_hw_tx_iq_cal_reload(struct ath_hw *ah)
1160{
1161 struct ath9k_hw_cal_data *caldata = ah->caldata;
1162 u32 tx_corr_coeff[MAX_MEASUREMENT][AR9300_MAX_CHAINS];
1163 int i, im;
1164
1165 memset(tx_corr_coeff, 0, sizeof(tx_corr_coeff));
1166 for (i = 0; i < MAX_MEASUREMENT / 2; i++) {
1167 tx_corr_coeff[i * 2][0] = tx_corr_coeff[(i * 2) + 1][0] =
1168 AR_PHY_TX_IQCAL_CORR_COEFF_B0(i);
1169 if (!AR_SREV_9485(ah)) {
1170 tx_corr_coeff[i * 2][1] =
1171 tx_corr_coeff[(i * 2) + 1][1] =
1172 AR_PHY_TX_IQCAL_CORR_COEFF_B1(i);
1173
1174 tx_corr_coeff[i * 2][2] =
1175 tx_corr_coeff[(i * 2) + 1][2] =
1176 AR_PHY_TX_IQCAL_CORR_COEFF_B2(i);
1177 }
1178 }
1179
1180 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
1181 if (!(ah->txchainmask & (1 << i)))
1182 continue;
1183
1184 for (im = 0; im < caldata->num_measures[i]; im++) {
1185 if ((im % 2) == 0)
1186 REG_RMW_FIELD(ah, tx_corr_coeff[im][i],
1187 AR_PHY_TX_IQCAL_CORR_COEFF_00_COEFF_TABLE,
1188 caldata->tx_corr_coeff[im][i]);
1189 else
1190 REG_RMW_FIELD(ah, tx_corr_coeff[im][i],
1191 AR_PHY_TX_IQCAL_CORR_COEFF_01_COEFF_TABLE,
1192 caldata->tx_corr_coeff[im][i]);
1193 }
1194 }
1195
1196 REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_3,
1197 AR_PHY_TX_IQCAL_CONTROL_3_IQCORR_EN, 0x1);
1198 REG_RMW_FIELD(ah, AR_PHY_RX_IQCAL_CORR_B0,
1199 AR_PHY_RX_IQCAL_CORR_B0_LOOPBACK_IQCORR_EN, 0x1);
1200}
1201
1202static void ar9003_hw_manual_peak_cal(struct ath_hw *ah, u8 chain, bool is_2g)
1203{
1204 int offset[8] = {0}, total = 0, test;
1205 int agc_out, i, peak_detect_threshold = 0;
1206
1207 if (AR_SREV_9550(ah) || AR_SREV_9531(ah))
1208 peak_detect_threshold = 8;
1209 else if (AR_SREV_9561(ah))
1210 peak_detect_threshold = 11;
1211
1212 /*
1213 * Turn off LNA/SW.
1214 */
1215 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_GAINSTAGES(chain),
1216 AR_PHY_65NM_RXRF_GAINSTAGES_RX_OVERRIDE, 0x1);
1217 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_GAINSTAGES(chain),
1218 AR_PHY_65NM_RXRF_GAINSTAGES_LNAON_CALDC, 0x0);
1219
1220 if (AR_SREV_9003_PCOEM(ah) || AR_SREV_9330_11(ah)) {
1221 if (is_2g)
1222 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_GAINSTAGES(chain),
1223 AR_PHY_65NM_RXRF_GAINSTAGES_LNA2G_GAIN_OVR, 0x0);
1224 else
1225 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_GAINSTAGES(chain),
1226 AR_PHY_65NM_RXRF_GAINSTAGES_LNA5G_GAIN_OVR, 0x0);
1227 }
1228
1229 /*
1230 * Turn off RXON.
1231 */
1232 REG_RMW_FIELD(ah, AR_PHY_65NM_RXTX2(chain),
1233 AR_PHY_65NM_RXTX2_RXON_OVR, 0x1);
1234 REG_RMW_FIELD(ah, AR_PHY_65NM_RXTX2(chain),
1235 AR_PHY_65NM_RXTX2_RXON, 0x0);
1236
1237 /*
1238 * Turn on AGC for cal.
1239 */
1240 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
1241 AR_PHY_65NM_RXRF_AGC_AGC_OVERRIDE, 0x1);
1242 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
1243 AR_PHY_65NM_RXRF_AGC_AGC_ON_OVR, 0x1);
1244 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
1245 AR_PHY_65NM_RXRF_AGC_AGC_CAL_OVR, 0x1);
1246
1247 if (AR_SREV_9330_11(ah))
1248 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
1249 AR_PHY_65NM_RXRF_AGC_AGC2G_CALDAC_OVR, 0x0);
1250
1251 if (is_2g)
1252 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
1253 AR_PHY_65NM_RXRF_AGC_AGC2G_DBDAC_OVR,
1254 peak_detect_threshold);
1255 else
1256 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
1257 AR_PHY_65NM_RXRF_AGC_AGC5G_DBDAC_OVR,
1258 peak_detect_threshold);
1259
1260 for (i = 6; i > 0; i--) {
1261 offset[i] = BIT(i - 1);
1262 test = total + offset[i];
1263
1264 if (is_2g)
1265 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
1266 AR_PHY_65NM_RXRF_AGC_AGC2G_CALDAC_OVR,
1267 test);
1268 else
1269 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
1270 AR_PHY_65NM_RXRF_AGC_AGC5G_CALDAC_OVR,
1271 test);
1272 udelay(100);
1273 agc_out = REG_READ_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
1274 AR_PHY_65NM_RXRF_AGC_AGC_OUT);
1275 offset[i] = (agc_out) ? 0 : 1;
1276 total += (offset[i] << (i - 1));
1277 }
1278
1279 if (is_2g)
1280 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
1281 AR_PHY_65NM_RXRF_AGC_AGC2G_CALDAC_OVR, total);
1282 else
1283 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
1284 AR_PHY_65NM_RXRF_AGC_AGC5G_CALDAC_OVR, total);
1285
1286 /*
1287 * Turn on LNA.
1288 */
1289 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_GAINSTAGES(chain),
1290 AR_PHY_65NM_RXRF_GAINSTAGES_RX_OVERRIDE, 0);
1291 /*
1292 * Turn off RXON.
1293 */
1294 REG_RMW_FIELD(ah, AR_PHY_65NM_RXTX2(chain),
1295 AR_PHY_65NM_RXTX2_RXON_OVR, 0);
1296 /*
1297 * Turn off peak detect calibration.
1298 */
1299 REG_RMW_FIELD(ah, AR_PHY_65NM_RXRF_AGC(chain),
1300 AR_PHY_65NM_RXRF_AGC_AGC_CAL_OVR, 0);
1301}
1302
1303static void ar9003_hw_do_pcoem_manual_peak_cal(struct ath_hw *ah,
1304 struct ath9k_channel *chan,
1305 bool run_rtt_cal)
1306{
1307 struct ath9k_hw_cal_data *caldata = ah->caldata;
1308 int i;
1309
1310 if ((ah->caps.hw_caps & ATH9K_HW_CAP_RTT) && !run_rtt_cal)
1311 return;
1312
1313 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
1314 if (!(ah->rxchainmask & (1 << i)))
1315 continue;
1316 ar9003_hw_manual_peak_cal(ah, i, IS_CHAN_2GHZ(chan));
1317 }
1318
1319 if (caldata)
1320 set_bit(SW_PKDET_DONE, &caldata->cal_flags);
1321
1322 if ((ah->caps.hw_caps & ATH9K_HW_CAP_RTT) && caldata) {
1323 if (IS_CHAN_2GHZ(chan)){
1324 caldata->caldac[0] = REG_READ_FIELD(ah,
1325 AR_PHY_65NM_RXRF_AGC(0),
1326 AR_PHY_65NM_RXRF_AGC_AGC2G_CALDAC_OVR);
1327 caldata->caldac[1] = REG_READ_FIELD(ah,
1328 AR_PHY_65NM_RXRF_AGC(1),
1329 AR_PHY_65NM_RXRF_AGC_AGC2G_CALDAC_OVR);
1330 } else {
1331 caldata->caldac[0] = REG_READ_FIELD(ah,
1332 AR_PHY_65NM_RXRF_AGC(0),
1333 AR_PHY_65NM_RXRF_AGC_AGC5G_CALDAC_OVR);
1334 caldata->caldac[1] = REG_READ_FIELD(ah,
1335 AR_PHY_65NM_RXRF_AGC(1),
1336 AR_PHY_65NM_RXRF_AGC_AGC5G_CALDAC_OVR);
1337 }
1338 }
1339}
1340
1341static void ar9003_hw_cl_cal_post_proc(struct ath_hw *ah, bool is_reusable)
1342{
1343 u32 cl_idx[AR9300_MAX_CHAINS] = { AR_PHY_CL_TAB_0,
1344 AR_PHY_CL_TAB_1,
1345 AR_PHY_CL_TAB_2 };
1346 struct ath9k_hw_cal_data *caldata = ah->caldata;
1347 bool txclcal_done = false;
1348 int i, j;
1349
1350 if (!caldata || !(ah->enabled_cals & TX_CL_CAL))
1351 return;
1352
1353 txclcal_done = !!(REG_READ(ah, AR_PHY_AGC_CONTROL) &
1354 AR_PHY_AGC_CONTROL_CLC_SUCCESS);
1355
1356 if (test_bit(TXCLCAL_DONE, &caldata->cal_flags)) {
1357 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
1358 if (!(ah->txchainmask & (1 << i)))
1359 continue;
1360 for (j = 0; j < MAX_CL_TAB_ENTRY; j++)
1361 REG_WRITE(ah, CL_TAB_ENTRY(cl_idx[i]),
1362 caldata->tx_clcal[i][j]);
1363 }
1364 } else if (is_reusable && txclcal_done) {
1365 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
1366 if (!(ah->txchainmask & (1 << i)))
1367 continue;
1368 for (j = 0; j < MAX_CL_TAB_ENTRY; j++)
1369 caldata->tx_clcal[i][j] =
1370 REG_READ(ah, CL_TAB_ENTRY(cl_idx[i]));
1371 }
1372 set_bit(TXCLCAL_DONE, &caldata->cal_flags);
1373 }
1374}
1375
1376static void ar9003_hw_init_cal_common(struct ath_hw *ah)
1377{
1378 struct ath9k_hw_cal_data *caldata = ah->caldata;
1379
1380 /* Initialize list pointers */
1381 ah->cal_list = ah->cal_list_last = ah->cal_list_curr = NULL;
1382
1383 INIT_CAL(&ah->iq_caldata);
1384 INSERT_CAL(ah, &ah->iq_caldata);
1385
1386 /* Initialize current pointer to first element in list */
1387 ah->cal_list_curr = ah->cal_list;
1388
1389 if (ah->cal_list_curr)
1390 ath9k_hw_reset_calibration(ah, ah->cal_list_curr);
1391
1392 if (caldata)
1393 caldata->CalValid = 0;
1394}
1395
1396static bool ar9003_hw_init_cal_pcoem(struct ath_hw *ah,
1397 struct ath9k_channel *chan)
1398{
1399 struct ath_common *common = ath9k_hw_common(ah);
1400 struct ath9k_hw_cal_data *caldata = ah->caldata;
1401 bool txiqcal_done = false;
1402 bool is_reusable = true, status = true;
1403 bool run_rtt_cal = false, run_agc_cal;
1404 bool rtt = !!(ah->caps.hw_caps & ATH9K_HW_CAP_RTT);
1405 u32 rx_delay = 0;
1406 u32 agc_ctrl = 0, agc_supp_cals = AR_PHY_AGC_CONTROL_OFFSET_CAL |
1407 AR_PHY_AGC_CONTROL_FLTR_CAL |
1408 AR_PHY_AGC_CONTROL_PKDET_CAL;
1409
1410 /* Use chip chainmask only for calibration */
1411 ar9003_hw_set_chain_masks(ah, ah->caps.rx_chainmask, ah->caps.tx_chainmask);
1412
1413 if (rtt) {
1414 if (!ar9003_hw_rtt_restore(ah, chan))
1415 run_rtt_cal = true;
1416
1417 if (run_rtt_cal)
1418 ath_dbg(common, CALIBRATE, "RTT calibration to be done\n");
1419 }
1420
1421 run_agc_cal = run_rtt_cal;
1422
1423 if (run_rtt_cal) {
1424 ar9003_hw_rtt_enable(ah);
1425 ar9003_hw_rtt_set_mask(ah, 0x00);
1426 ar9003_hw_rtt_clear_hist(ah);
1427 }
1428
1429 if (rtt) {
1430 if (!run_rtt_cal) {
1431 agc_ctrl = REG_READ(ah, AR_PHY_AGC_CONTROL);
1432 agc_supp_cals &= agc_ctrl;
1433 agc_ctrl &= ~(AR_PHY_AGC_CONTROL_OFFSET_CAL |
1434 AR_PHY_AGC_CONTROL_FLTR_CAL |
1435 AR_PHY_AGC_CONTROL_PKDET_CAL);
1436 REG_WRITE(ah, AR_PHY_AGC_CONTROL, agc_ctrl);
1437 } else {
1438 if (ah->ah_flags & AH_FASTCC)
1439 run_agc_cal = true;
1440 }
1441 }
1442
1443 if (ah->enabled_cals & TX_CL_CAL) {
1444 if (caldata && test_bit(TXCLCAL_DONE, &caldata->cal_flags))
1445 REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL,
1446 AR_PHY_CL_CAL_ENABLE);
1447 else {
1448 REG_SET_BIT(ah, AR_PHY_CL_CAL_CTL,
1449 AR_PHY_CL_CAL_ENABLE);
1450 run_agc_cal = true;
1451 }
1452 }
1453
1454 if ((IS_CHAN_HALF_RATE(chan) || IS_CHAN_QUARTER_RATE(chan)) ||
1455 !(ah->enabled_cals & TX_IQ_CAL))
1456 goto skip_tx_iqcal;
1457
1458 /* Do Tx IQ Calibration */
1459 REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_1,
1460 AR_PHY_TX_IQCAL_CONTROL_1_IQCORR_I_Q_COFF_DELPT,
1461 DELPT);
1462
1463 /*
1464 * For AR9485 or later chips, TxIQ cal runs as part of
1465 * AGC calibration
1466 */
1467 if (ah->enabled_cals & TX_IQ_ON_AGC_CAL) {
1468 if (caldata && !test_bit(TXIQCAL_DONE, &caldata->cal_flags))
1469 REG_SET_BIT(ah, AR_PHY_TX_IQCAL_CONTROL_0,
1470 AR_PHY_TX_IQCAL_CONTROL_0_ENABLE_TXIQ_CAL);
1471 else
1472 REG_CLR_BIT(ah, AR_PHY_TX_IQCAL_CONTROL_0,
1473 AR_PHY_TX_IQCAL_CONTROL_0_ENABLE_TXIQ_CAL);
1474 txiqcal_done = run_agc_cal = true;
1475 }
1476
1477skip_tx_iqcal:
1478 if (ath9k_hw_mci_is_enabled(ah) && IS_CHAN_2GHZ(chan) && run_agc_cal)
1479 ar9003_mci_init_cal_req(ah, &is_reusable);
1480
1481 if (REG_READ(ah, AR_PHY_CL_CAL_CTL) & AR_PHY_CL_CAL_ENABLE) {
1482 rx_delay = REG_READ(ah, AR_PHY_RX_DELAY);
1483 /* Disable BB_active */
1484 REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_DIS);
1485 udelay(5);
1486 REG_WRITE(ah, AR_PHY_RX_DELAY, AR_PHY_RX_DELAY_DELAY);
1487 REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_EN);
1488 }
1489
1490 if (run_agc_cal || !(ah->ah_flags & AH_FASTCC)) {
1491 /* Calibrate the AGC */
1492 REG_WRITE(ah, AR_PHY_AGC_CONTROL,
1493 REG_READ(ah, AR_PHY_AGC_CONTROL) |
1494 AR_PHY_AGC_CONTROL_CAL);
1495
1496 /* Poll for offset calibration complete */
1497 status = ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL,
1498 AR_PHY_AGC_CONTROL_CAL,
1499 0, AH_WAIT_TIMEOUT);
1500
1501 ar9003_hw_do_pcoem_manual_peak_cal(ah, chan, run_rtt_cal);
1502 }
1503
1504 if (REG_READ(ah, AR_PHY_CL_CAL_CTL) & AR_PHY_CL_CAL_ENABLE) {
1505 REG_WRITE(ah, AR_PHY_RX_DELAY, rx_delay);
1506 udelay(5);
1507 }
1508
1509 if (ath9k_hw_mci_is_enabled(ah) && IS_CHAN_2GHZ(chan) && run_agc_cal)
1510 ar9003_mci_init_cal_done(ah);
1511
1512 if (rtt && !run_rtt_cal) {
1513 agc_ctrl |= agc_supp_cals;
1514 REG_WRITE(ah, AR_PHY_AGC_CONTROL, agc_ctrl);
1515 }
1516
1517 if (!status) {
1518 if (run_rtt_cal)
1519 ar9003_hw_rtt_disable(ah);
1520
1521 ath_dbg(common, CALIBRATE,
1522 "offset calibration failed to complete in %d ms; noisy environment?\n",
1523 AH_WAIT_TIMEOUT / 1000);
1524 return false;
1525 }
1526
1527 if (txiqcal_done)
1528 ar9003_hw_tx_iq_cal_post_proc(ah, 0, is_reusable);
1529 else if (caldata && test_bit(TXIQCAL_DONE, &caldata->cal_flags))
1530 ar9003_hw_tx_iq_cal_reload(ah);
1531
1532 ar9003_hw_cl_cal_post_proc(ah, is_reusable);
1533
1534 if (run_rtt_cal && caldata) {
1535 if (is_reusable) {
1536 if (!ath9k_hw_rfbus_req(ah)) {
1537 ath_err(ath9k_hw_common(ah),
1538 "Could not stop baseband\n");
1539 } else {
1540 ar9003_hw_rtt_fill_hist(ah);
1541
1542 if (test_bit(SW_PKDET_DONE, &caldata->cal_flags))
1543 ar9003_hw_rtt_load_hist(ah);
1544 }
1545
1546 ath9k_hw_rfbus_done(ah);
1547 }
1548
1549 ar9003_hw_rtt_disable(ah);
1550 }
1551
1552 /* Revert chainmask to runtime parameters */
1553 ar9003_hw_set_chain_masks(ah, ah->rxchainmask, ah->txchainmask);
1554
1555 ar9003_hw_init_cal_common(ah);
1556
1557 return true;
1558}
1559
1560static bool do_ar9003_agc_cal(struct ath_hw *ah)
1561{
1562 struct ath_common *common = ath9k_hw_common(ah);
1563 bool status;
1564
1565 REG_WRITE(ah, AR_PHY_AGC_CONTROL,
1566 REG_READ(ah, AR_PHY_AGC_CONTROL) |
1567 AR_PHY_AGC_CONTROL_CAL);
1568
1569 status = ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL,
1570 AR_PHY_AGC_CONTROL_CAL,
1571 0, AH_WAIT_TIMEOUT);
1572 if (!status) {
1573 ath_dbg(common, CALIBRATE,
1574 "offset calibration failed to complete in %d ms,"
1575 "noisy environment?\n",
1576 AH_WAIT_TIMEOUT / 1000);
1577 return false;
1578 }
1579
1580 return true;
1581}
1582
1583static bool ar9003_hw_init_cal_soc(struct ath_hw *ah,
1584 struct ath9k_channel *chan)
1585{
1586 bool txiqcal_done = false;
1587 bool status = true;
1588 bool run_agc_cal = false, sep_iq_cal = false;
1589 int i = 0;
1590
1591 /* Use chip chainmask only for calibration */
1592 ar9003_hw_set_chain_masks(ah, ah->caps.rx_chainmask, ah->caps.tx_chainmask);
1593
1594 if (ah->enabled_cals & TX_CL_CAL) {
1595 REG_SET_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE);
1596 run_agc_cal = true;
1597 }
1598
1599 if (IS_CHAN_HALF_RATE(chan) || IS_CHAN_QUARTER_RATE(chan))
1600 goto skip_tx_iqcal;
1601
1602 /* Do Tx IQ Calibration */
1603 REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_1,
1604 AR_PHY_TX_IQCAL_CONTROL_1_IQCORR_I_Q_COFF_DELPT,
1605 DELPT);
1606
1607 /*
1608 * For AR9485 or later chips, TxIQ cal runs as part of
1609 * AGC calibration. Specifically, AR9550 in SoC chips.
1610 */
1611 if (ah->enabled_cals & TX_IQ_ON_AGC_CAL) {
1612 if (REG_READ_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_0,
1613 AR_PHY_TX_IQCAL_CONTROL_0_ENABLE_TXIQ_CAL)) {
1614 txiqcal_done = true;
1615 } else {
1616 txiqcal_done = false;
1617 }
1618 run_agc_cal = true;
1619 } else {
1620 sep_iq_cal = true;
1621 run_agc_cal = true;
1622 }
1623
1624 /*
1625 * In the SoC family, this will run for AR9300, AR9331 and AR9340.
1626 */
1627 if (sep_iq_cal) {
1628 txiqcal_done = ar9003_hw_tx_iq_cal_run(ah);
1629 REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_DIS);
1630 udelay(5);
1631 REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_EN);
1632 }
1633
1634 if (AR_SREV_9550(ah) && IS_CHAN_2GHZ(chan)) {
1635 if (!ar9003_hw_dynamic_osdac_selection(ah, txiqcal_done))
1636 return false;
1637 }
1638
1639skip_tx_iqcal:
1640 if (run_agc_cal || !(ah->ah_flags & AH_FASTCC)) {
1641 for (i = 0; i < AR9300_MAX_CHAINS; i++) {
1642 if (!(ah->rxchainmask & (1 << i)))
1643 continue;
1644
1645 ar9003_hw_manual_peak_cal(ah, i,
1646 IS_CHAN_2GHZ(chan));
1647 }
1648
1649 /*
1650 * For non-AR9550 chips, we just trigger AGC calibration
1651 * in the HW, poll for completion and then process
1652 * the results.
1653 *
1654 * For AR955x, we run it multiple times and use
1655 * median IQ correction.
1656 */
1657 if (!AR_SREV_9550(ah)) {
1658 status = do_ar9003_agc_cal(ah);
1659 if (!status)
1660 return false;
1661
1662 if (txiqcal_done)
1663 ar9003_hw_tx_iq_cal_post_proc(ah, 0, false);
1664 } else {
1665 if (!txiqcal_done) {
1666 status = do_ar9003_agc_cal(ah);
1667 if (!status)
1668 return false;
1669 } else {
1670 for (i = 0; i < MAXIQCAL; i++) {
1671 status = do_ar9003_agc_cal(ah);
1672 if (!status)
1673 return false;
1674 ar9003_hw_tx_iq_cal_post_proc(ah, i, false);
1675 }
1676 }
1677 }
1678 }
1679
1680 /* Revert chainmask to runtime parameters */
1681 ar9003_hw_set_chain_masks(ah, ah->rxchainmask, ah->txchainmask);
1682
1683 ar9003_hw_init_cal_common(ah);
1684
1685 return true;
1686}
1687
1688void ar9003_hw_attach_calib_ops(struct ath_hw *ah)
1689{
1690 struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah);
1691 struct ath_hw_ops *ops = ath9k_hw_ops(ah);
1692
1693 if (AR_SREV_9003_PCOEM(ah))
1694 priv_ops->init_cal = ar9003_hw_init_cal_pcoem;
1695 else
1696 priv_ops->init_cal = ar9003_hw_init_cal_soc;
1697
1698 priv_ops->init_cal_settings = ar9003_hw_init_cal_settings;
1699 priv_ops->setup_calibration = ar9003_hw_setup_calibration;
1700
1701 ops->calibrate = ar9003_hw_calibrate;
1702}