| /* |
| * Copyright (c) 2010-2011 Atheros Communications Inc. |
| * |
| * Permission to use, copy, modify, and/or distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| #include "hw.h" |
| #include "hw-ops.h" |
| #include "ar9003_phy.h" |
| |
| #define MAX_MEASUREMENT 8 |
| #define MAX_MAG_DELTA 11 |
| #define MAX_PHS_DELTA 10 |
| |
| struct coeff { |
| int mag_coeff[AR9300_MAX_CHAINS][MAX_MEASUREMENT]; |
| int phs_coeff[AR9300_MAX_CHAINS][MAX_MEASUREMENT]; |
| int iqc_coeff[2]; |
| }; |
| |
| enum ar9003_cal_types { |
| IQ_MISMATCH_CAL = BIT(0), |
| TEMP_COMP_CAL = BIT(1), |
| }; |
| |
| static void ar9003_hw_setup_calibration(struct ath_hw *ah, |
| struct ath9k_cal_list *currCal) |
| { |
| struct ath_common *common = ath9k_hw_common(ah); |
| |
| /* Select calibration to run */ |
| switch (currCal->calData->calType) { |
| case IQ_MISMATCH_CAL: |
| /* |
| * Start calibration with |
| * 2^(INIT_IQCAL_LOG_COUNT_MAX+1) samples |
| */ |
| REG_RMW_FIELD(ah, AR_PHY_TIMING4, |
| AR_PHY_TIMING4_IQCAL_LOG_COUNT_MAX, |
| currCal->calData->calCountMax); |
| REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_IQ); |
| |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "starting IQ Mismatch Calibration\n"); |
| |
| /* Kick-off cal */ |
| REG_SET_BIT(ah, AR_PHY_TIMING4, AR_PHY_TIMING4_DO_CAL); |
| break; |
| case TEMP_COMP_CAL: |
| REG_RMW_FIELD(ah, AR_PHY_65NM_CH0_THERM, |
| AR_PHY_65NM_CH0_THERM_LOCAL, 1); |
| REG_RMW_FIELD(ah, AR_PHY_65NM_CH0_THERM, |
| AR_PHY_65NM_CH0_THERM_START, 1); |
| |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "starting Temperature Compensation Calibration\n"); |
| break; |
| } |
| } |
| |
| /* |
| * Generic calibration routine. |
| * Recalibrate the lower PHY chips to account for temperature/environment |
| * changes. |
| */ |
| static bool ar9003_hw_per_calibration(struct ath_hw *ah, |
| struct ath9k_channel *ichan, |
| u8 rxchainmask, |
| struct ath9k_cal_list *currCal) |
| { |
| struct ath9k_hw_cal_data *caldata = ah->caldata; |
| /* Cal is assumed not done until explicitly set below */ |
| bool iscaldone = false; |
| |
| /* Calibration in progress. */ |
| if (currCal->calState == CAL_RUNNING) { |
| /* Check to see if it has finished. */ |
| if (!(REG_READ(ah, AR_PHY_TIMING4) & AR_PHY_TIMING4_DO_CAL)) { |
| /* |
| * Accumulate cal measures for active chains |
| */ |
| currCal->calData->calCollect(ah); |
| ah->cal_samples++; |
| |
| if (ah->cal_samples >= |
| currCal->calData->calNumSamples) { |
| unsigned int i, numChains = 0; |
| for (i = 0; i < AR9300_MAX_CHAINS; i++) { |
| if (rxchainmask & (1 << i)) |
| numChains++; |
| } |
| |
| /* |
| * Process accumulated data |
| */ |
| currCal->calData->calPostProc(ah, numChains); |
| |
| /* Calibration has finished. */ |
| caldata->CalValid |= currCal->calData->calType; |
| currCal->calState = CAL_DONE; |
| iscaldone = true; |
| } else { |
| /* |
| * Set-up collection of another sub-sample until we |
| * get desired number |
| */ |
| ar9003_hw_setup_calibration(ah, currCal); |
| } |
| } |
| } else if (!(caldata->CalValid & currCal->calData->calType)) { |
| /* If current cal is marked invalid in channel, kick it off */ |
| ath9k_hw_reset_calibration(ah, currCal); |
| } |
| |
| return iscaldone; |
| } |
| |
| static bool ar9003_hw_calibrate(struct ath_hw *ah, |
| struct ath9k_channel *chan, |
| u8 rxchainmask, |
| bool longcal) |
| { |
| bool iscaldone = true; |
| struct ath9k_cal_list *currCal = ah->cal_list_curr; |
| |
| /* |
| * For given calibration: |
| * 1. Call generic cal routine |
| * 2. When this cal is done (isCalDone) if we have more cals waiting |
| * (eg after reset), mask this to upper layers by not propagating |
| * isCalDone if it is set to TRUE. |
| * Instead, change isCalDone to FALSE and setup the waiting cal(s) |
| * to be run. |
| */ |
| if (currCal && |
| (currCal->calState == CAL_RUNNING || |
| currCal->calState == CAL_WAITING)) { |
| iscaldone = ar9003_hw_per_calibration(ah, chan, |
| rxchainmask, currCal); |
| if (iscaldone) { |
| ah->cal_list_curr = currCal = currCal->calNext; |
| |
| if (currCal->calState == CAL_WAITING) { |
| iscaldone = false; |
| ath9k_hw_reset_calibration(ah, currCal); |
| } |
| } |
| } |
| |
| /* Do NF cal only at longer intervals */ |
| if (longcal) { |
| /* |
| * Get the value from the previous NF cal and update |
| * history buffer. |
| */ |
| ath9k_hw_getnf(ah, chan); |
| |
| /* |
| * Load the NF from history buffer of the current channel. |
| * NF is slow time-variant, so it is OK to use a historical |
| * value. |
| */ |
| ath9k_hw_loadnf(ah, ah->curchan); |
| |
| /* start NF calibration, without updating BB NF register */ |
| ath9k_hw_start_nfcal(ah, false); |
| } |
| |
| return iscaldone; |
| } |
| |
| static void ar9003_hw_iqcal_collect(struct ath_hw *ah) |
| { |
| int i; |
| |
| /* Accumulate IQ cal measures for active chains */ |
| for (i = 0; i < AR5416_MAX_CHAINS; i++) { |
| if (ah->txchainmask & BIT(i)) { |
| ah->totalPowerMeasI[i] += |
| REG_READ(ah, AR_PHY_CAL_MEAS_0(i)); |
| ah->totalPowerMeasQ[i] += |
| REG_READ(ah, AR_PHY_CAL_MEAS_1(i)); |
| ah->totalIqCorrMeas[i] += |
| (int32_t) REG_READ(ah, AR_PHY_CAL_MEAS_2(i)); |
| ath_dbg(ath9k_hw_common(ah), ATH_DBG_CALIBRATE, |
| "%d: Chn %d pmi=0x%08x;pmq=0x%08x;iqcm=0x%08x;\n", |
| ah->cal_samples, i, ah->totalPowerMeasI[i], |
| ah->totalPowerMeasQ[i], |
| ah->totalIqCorrMeas[i]); |
| } |
| } |
| } |
| |
| static void ar9003_hw_iqcalibrate(struct ath_hw *ah, u8 numChains) |
| { |
| struct ath_common *common = ath9k_hw_common(ah); |
| u32 powerMeasQ, powerMeasI, iqCorrMeas; |
| u32 qCoffDenom, iCoffDenom; |
| int32_t qCoff, iCoff; |
| int iqCorrNeg, i; |
| static const u_int32_t offset_array[3] = { |
| AR_PHY_RX_IQCAL_CORR_B0, |
| AR_PHY_RX_IQCAL_CORR_B1, |
| AR_PHY_RX_IQCAL_CORR_B2, |
| }; |
| |
| for (i = 0; i < numChains; i++) { |
| powerMeasI = ah->totalPowerMeasI[i]; |
| powerMeasQ = ah->totalPowerMeasQ[i]; |
| iqCorrMeas = ah->totalIqCorrMeas[i]; |
| |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Starting IQ Cal and Correction for Chain %d\n", |
| i); |
| |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Orignal: Chn %diq_corr_meas = 0x%08x\n", |
| i, ah->totalIqCorrMeas[i]); |
| |
| iqCorrNeg = 0; |
| |
| if (iqCorrMeas > 0x80000000) { |
| iqCorrMeas = (0xffffffff - iqCorrMeas) + 1; |
| iqCorrNeg = 1; |
| } |
| |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Chn %d pwr_meas_i = 0x%08x\n", i, powerMeasI); |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Chn %d pwr_meas_q = 0x%08x\n", i, powerMeasQ); |
| ath_dbg(common, ATH_DBG_CALIBRATE, "iqCorrNeg is 0x%08x\n", |
| iqCorrNeg); |
| |
| iCoffDenom = (powerMeasI / 2 + powerMeasQ / 2) / 256; |
| qCoffDenom = powerMeasQ / 64; |
| |
| if ((iCoffDenom != 0) && (qCoffDenom != 0)) { |
| iCoff = iqCorrMeas / iCoffDenom; |
| qCoff = powerMeasI / qCoffDenom - 64; |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Chn %d iCoff = 0x%08x\n", i, iCoff); |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Chn %d qCoff = 0x%08x\n", i, qCoff); |
| |
| /* Force bounds on iCoff */ |
| if (iCoff >= 63) |
| iCoff = 63; |
| else if (iCoff <= -63) |
| iCoff = -63; |
| |
| /* Negate iCoff if iqCorrNeg == 0 */ |
| if (iqCorrNeg == 0x0) |
| iCoff = -iCoff; |
| |
| /* Force bounds on qCoff */ |
| if (qCoff >= 63) |
| qCoff = 63; |
| else if (qCoff <= -63) |
| qCoff = -63; |
| |
| iCoff = iCoff & 0x7f; |
| qCoff = qCoff & 0x7f; |
| |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Chn %d : iCoff = 0x%x qCoff = 0x%x\n", |
| i, iCoff, qCoff); |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Register offset (0x%04x) before update = 0x%x\n", |
| offset_array[i], |
| REG_READ(ah, offset_array[i])); |
| |
| REG_RMW_FIELD(ah, offset_array[i], |
| AR_PHY_RX_IQCAL_CORR_IQCORR_Q_I_COFF, |
| iCoff); |
| REG_RMW_FIELD(ah, offset_array[i], |
| AR_PHY_RX_IQCAL_CORR_IQCORR_Q_Q_COFF, |
| qCoff); |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Register offset (0x%04x) QI COFF (bitfields 0x%08x) after update = 0x%x\n", |
| offset_array[i], |
| AR_PHY_RX_IQCAL_CORR_IQCORR_Q_I_COFF, |
| REG_READ(ah, offset_array[i])); |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Register offset (0x%04x) QQ COFF (bitfields 0x%08x) after update = 0x%x\n", |
| offset_array[i], |
| AR_PHY_RX_IQCAL_CORR_IQCORR_Q_Q_COFF, |
| REG_READ(ah, offset_array[i])); |
| |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "IQ Cal and Correction done for Chain %d\n", i); |
| } |
| } |
| |
| REG_SET_BIT(ah, AR_PHY_RX_IQCAL_CORR_B0, |
| AR_PHY_RX_IQCAL_CORR_IQCORR_ENABLE); |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "IQ Cal and Correction (offset 0x%04x) enabled (bit position 0x%08x). New Value 0x%08x\n", |
| (unsigned) (AR_PHY_RX_IQCAL_CORR_B0), |
| AR_PHY_RX_IQCAL_CORR_IQCORR_ENABLE, |
| REG_READ(ah, AR_PHY_RX_IQCAL_CORR_B0)); |
| } |
| |
| static const struct ath9k_percal_data iq_cal_single_sample = { |
| IQ_MISMATCH_CAL, |
| MIN_CAL_SAMPLES, |
| PER_MAX_LOG_COUNT, |
| ar9003_hw_iqcal_collect, |
| ar9003_hw_iqcalibrate |
| }; |
| |
| static void ar9003_hw_init_cal_settings(struct ath_hw *ah) |
| { |
| ah->iq_caldata.calData = &iq_cal_single_sample; |
| } |
| |
| /* |
| * solve 4x4 linear equation used in loopback iq cal. |
| */ |
| static bool ar9003_hw_solve_iq_cal(struct ath_hw *ah, |
| s32 sin_2phi_1, |
| s32 cos_2phi_1, |
| s32 sin_2phi_2, |
| s32 cos_2phi_2, |
| s32 mag_a0_d0, |
| s32 phs_a0_d0, |
| s32 mag_a1_d0, |
| s32 phs_a1_d0, |
| s32 solved_eq[]) |
| { |
| s32 f1 = cos_2phi_1 - cos_2phi_2, |
| f3 = sin_2phi_1 - sin_2phi_2, |
| f2; |
| s32 mag_tx, phs_tx, mag_rx, phs_rx; |
| const s32 result_shift = 1 << 15; |
| struct ath_common *common = ath9k_hw_common(ah); |
| |
| f2 = (f1 * f1 + f3 * f3) / result_shift; |
| |
| if (!f2) { |
| ath_dbg(common, ATH_DBG_CALIBRATE, "Divide by 0\n"); |
| return false; |
| } |
| |
| /* mag mismatch, tx */ |
| mag_tx = f1 * (mag_a0_d0 - mag_a1_d0) + f3 * (phs_a0_d0 - phs_a1_d0); |
| /* phs mismatch, tx */ |
| phs_tx = f3 * (-mag_a0_d0 + mag_a1_d0) + f1 * (phs_a0_d0 - phs_a1_d0); |
| |
| mag_tx = (mag_tx / f2); |
| phs_tx = (phs_tx / f2); |
| |
| /* mag mismatch, rx */ |
| mag_rx = mag_a0_d0 - (cos_2phi_1 * mag_tx + sin_2phi_1 * phs_tx) / |
| result_shift; |
| /* phs mismatch, rx */ |
| phs_rx = phs_a0_d0 + (sin_2phi_1 * mag_tx - cos_2phi_1 * phs_tx) / |
| result_shift; |
| |
| solved_eq[0] = mag_tx; |
| solved_eq[1] = phs_tx; |
| solved_eq[2] = mag_rx; |
| solved_eq[3] = phs_rx; |
| |
| return true; |
| } |
| |
| static s32 ar9003_hw_find_mag_approx(struct ath_hw *ah, s32 in_re, s32 in_im) |
| { |
| s32 abs_i = abs(in_re), |
| abs_q = abs(in_im), |
| max_abs, min_abs; |
| |
| if (abs_i > abs_q) { |
| max_abs = abs_i; |
| min_abs = abs_q; |
| } else { |
| max_abs = abs_q; |
| min_abs = abs_i; |
| } |
| |
| return max_abs - (max_abs / 32) + (min_abs / 8) + (min_abs / 4); |
| } |
| |
| #define DELPT 32 |
| |
| static bool ar9003_hw_calc_iq_corr(struct ath_hw *ah, |
| s32 chain_idx, |
| const s32 iq_res[], |
| s32 iqc_coeff[]) |
| { |
| s32 i2_m_q2_a0_d0, i2_p_q2_a0_d0, iq_corr_a0_d0, |
| i2_m_q2_a0_d1, i2_p_q2_a0_d1, iq_corr_a0_d1, |
| i2_m_q2_a1_d0, i2_p_q2_a1_d0, iq_corr_a1_d0, |
| i2_m_q2_a1_d1, i2_p_q2_a1_d1, iq_corr_a1_d1; |
| s32 mag_a0_d0, mag_a1_d0, mag_a0_d1, mag_a1_d1, |
| phs_a0_d0, phs_a1_d0, phs_a0_d1, phs_a1_d1, |
| sin_2phi_1, cos_2phi_1, |
| sin_2phi_2, cos_2phi_2; |
| s32 mag_tx, phs_tx, mag_rx, phs_rx; |
| s32 solved_eq[4], mag_corr_tx, phs_corr_tx, mag_corr_rx, phs_corr_rx, |
| q_q_coff, q_i_coff; |
| const s32 res_scale = 1 << 15; |
| const s32 delpt_shift = 1 << 8; |
| s32 mag1, mag2; |
| struct ath_common *common = ath9k_hw_common(ah); |
| |
| i2_m_q2_a0_d0 = iq_res[0] & 0xfff; |
| i2_p_q2_a0_d0 = (iq_res[0] >> 12) & 0xfff; |
| iq_corr_a0_d0 = ((iq_res[0] >> 24) & 0xff) + ((iq_res[1] & 0xf) << 8); |
| |
| if (i2_m_q2_a0_d0 > 0x800) |
| i2_m_q2_a0_d0 = -((0xfff - i2_m_q2_a0_d0) + 1); |
| |
| if (i2_p_q2_a0_d0 > 0x800) |
| i2_p_q2_a0_d0 = -((0xfff - i2_p_q2_a0_d0) + 1); |
| |
| if (iq_corr_a0_d0 > 0x800) |
| iq_corr_a0_d0 = -((0xfff - iq_corr_a0_d0) + 1); |
| |
| i2_m_q2_a0_d1 = (iq_res[1] >> 4) & 0xfff; |
| i2_p_q2_a0_d1 = (iq_res[2] & 0xfff); |
| iq_corr_a0_d1 = (iq_res[2] >> 12) & 0xfff; |
| |
| if (i2_m_q2_a0_d1 > 0x800) |
| i2_m_q2_a0_d1 = -((0xfff - i2_m_q2_a0_d1) + 1); |
| |
| if (i2_p_q2_a0_d1 > 0x800) |
| i2_p_q2_a0_d1 = -((0xfff - i2_p_q2_a0_d1) + 1); |
| |
| if (iq_corr_a0_d1 > 0x800) |
| iq_corr_a0_d1 = -((0xfff - iq_corr_a0_d1) + 1); |
| |
| i2_m_q2_a1_d0 = ((iq_res[2] >> 24) & 0xff) + ((iq_res[3] & 0xf) << 8); |
| i2_p_q2_a1_d0 = (iq_res[3] >> 4) & 0xfff; |
| iq_corr_a1_d0 = iq_res[4] & 0xfff; |
| |
| if (i2_m_q2_a1_d0 > 0x800) |
| i2_m_q2_a1_d0 = -((0xfff - i2_m_q2_a1_d0) + 1); |
| |
| if (i2_p_q2_a1_d0 > 0x800) |
| i2_p_q2_a1_d0 = -((0xfff - i2_p_q2_a1_d0) + 1); |
| |
| if (iq_corr_a1_d0 > 0x800) |
| iq_corr_a1_d0 = -((0xfff - iq_corr_a1_d0) + 1); |
| |
| i2_m_q2_a1_d1 = (iq_res[4] >> 12) & 0xfff; |
| i2_p_q2_a1_d1 = ((iq_res[4] >> 24) & 0xff) + ((iq_res[5] & 0xf) << 8); |
| iq_corr_a1_d1 = (iq_res[5] >> 4) & 0xfff; |
| |
| if (i2_m_q2_a1_d1 > 0x800) |
| i2_m_q2_a1_d1 = -((0xfff - i2_m_q2_a1_d1) + 1); |
| |
| if (i2_p_q2_a1_d1 > 0x800) |
| i2_p_q2_a1_d1 = -((0xfff - i2_p_q2_a1_d1) + 1); |
| |
| if (iq_corr_a1_d1 > 0x800) |
| iq_corr_a1_d1 = -((0xfff - iq_corr_a1_d1) + 1); |
| |
| if ((i2_p_q2_a0_d0 == 0) || (i2_p_q2_a0_d1 == 0) || |
| (i2_p_q2_a1_d0 == 0) || (i2_p_q2_a1_d1 == 0)) { |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Divide by 0:\n" |
| "a0_d0=%d\n" |
| "a0_d1=%d\n" |
| "a2_d0=%d\n" |
| "a1_d1=%d\n", |
| i2_p_q2_a0_d0, i2_p_q2_a0_d1, |
| i2_p_q2_a1_d0, i2_p_q2_a1_d1); |
| return false; |
| } |
| |
| mag_a0_d0 = (i2_m_q2_a0_d0 * res_scale) / i2_p_q2_a0_d0; |
| phs_a0_d0 = (iq_corr_a0_d0 * res_scale) / i2_p_q2_a0_d0; |
| |
| mag_a0_d1 = (i2_m_q2_a0_d1 * res_scale) / i2_p_q2_a0_d1; |
| phs_a0_d1 = (iq_corr_a0_d1 * res_scale) / i2_p_q2_a0_d1; |
| |
| mag_a1_d0 = (i2_m_q2_a1_d0 * res_scale) / i2_p_q2_a1_d0; |
| phs_a1_d0 = (iq_corr_a1_d0 * res_scale) / i2_p_q2_a1_d0; |
| |
| mag_a1_d1 = (i2_m_q2_a1_d1 * res_scale) / i2_p_q2_a1_d1; |
| phs_a1_d1 = (iq_corr_a1_d1 * res_scale) / i2_p_q2_a1_d1; |
| |
| /* w/o analog phase shift */ |
| sin_2phi_1 = (((mag_a0_d0 - mag_a0_d1) * delpt_shift) / DELPT); |
| /* w/o analog phase shift */ |
| cos_2phi_1 = (((phs_a0_d1 - phs_a0_d0) * delpt_shift) / DELPT); |
| /* w/ analog phase shift */ |
| sin_2phi_2 = (((mag_a1_d0 - mag_a1_d1) * delpt_shift) / DELPT); |
| /* w/ analog phase shift */ |
| cos_2phi_2 = (((phs_a1_d1 - phs_a1_d0) * delpt_shift) / DELPT); |
| |
| /* |
| * force sin^2 + cos^2 = 1; |
| * find magnitude by approximation |
| */ |
| mag1 = ar9003_hw_find_mag_approx(ah, cos_2phi_1, sin_2phi_1); |
| mag2 = ar9003_hw_find_mag_approx(ah, cos_2phi_2, sin_2phi_2); |
| |
| if ((mag1 == 0) || (mag2 == 0)) { |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Divide by 0: mag1=%d, mag2=%d\n", |
| mag1, mag2); |
| return false; |
| } |
| |
| /* normalization sin and cos by mag */ |
| sin_2phi_1 = (sin_2phi_1 * res_scale / mag1); |
| cos_2phi_1 = (cos_2phi_1 * res_scale / mag1); |
| sin_2phi_2 = (sin_2phi_2 * res_scale / mag2); |
| cos_2phi_2 = (cos_2phi_2 * res_scale / mag2); |
| |
| /* calculate IQ mismatch */ |
| if (!ar9003_hw_solve_iq_cal(ah, |
| sin_2phi_1, cos_2phi_1, |
| sin_2phi_2, cos_2phi_2, |
| mag_a0_d0, phs_a0_d0, |
| mag_a1_d0, |
| phs_a1_d0, solved_eq)) { |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Call to ar9003_hw_solve_iq_cal() failed.\n"); |
| return false; |
| } |
| |
| mag_tx = solved_eq[0]; |
| phs_tx = solved_eq[1]; |
| mag_rx = solved_eq[2]; |
| phs_rx = solved_eq[3]; |
| |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "chain %d: mag mismatch=%d phase mismatch=%d\n", |
| chain_idx, mag_tx/res_scale, phs_tx/res_scale); |
| |
| if (res_scale == mag_tx) { |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Divide by 0: mag_tx=%d, res_scale=%d\n", |
| mag_tx, res_scale); |
| return false; |
| } |
| |
| /* calculate and quantize Tx IQ correction factor */ |
| mag_corr_tx = (mag_tx * res_scale) / (res_scale - mag_tx); |
| phs_corr_tx = -phs_tx; |
| |
| q_q_coff = (mag_corr_tx * 128 / res_scale); |
| q_i_coff = (phs_corr_tx * 256 / res_scale); |
| |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "tx chain %d: mag corr=%d phase corr=%d\n", |
| chain_idx, q_q_coff, q_i_coff); |
| |
| if (q_i_coff < -63) |
| q_i_coff = -63; |
| if (q_i_coff > 63) |
| q_i_coff = 63; |
| if (q_q_coff < -63) |
| q_q_coff = -63; |
| if (q_q_coff > 63) |
| q_q_coff = 63; |
| |
| iqc_coeff[0] = (q_q_coff * 128) + q_i_coff; |
| |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "tx chain %d: iq corr coeff=%x\n", |
| chain_idx, iqc_coeff[0]); |
| |
| if (-mag_rx == res_scale) { |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Divide by 0: mag_rx=%d, res_scale=%d\n", |
| mag_rx, res_scale); |
| return false; |
| } |
| |
| /* calculate and quantize Rx IQ correction factors */ |
| mag_corr_rx = (-mag_rx * res_scale) / (res_scale + mag_rx); |
| phs_corr_rx = -phs_rx; |
| |
| q_q_coff = (mag_corr_rx * 128 / res_scale); |
| q_i_coff = (phs_corr_rx * 256 / res_scale); |
| |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "rx chain %d: mag corr=%d phase corr=%d\n", |
| chain_idx, q_q_coff, q_i_coff); |
| |
| if (q_i_coff < -63) |
| q_i_coff = -63; |
| if (q_i_coff > 63) |
| q_i_coff = 63; |
| if (q_q_coff < -63) |
| q_q_coff = -63; |
| if (q_q_coff > 63) |
| q_q_coff = 63; |
| |
| iqc_coeff[1] = (q_q_coff * 128) + q_i_coff; |
| |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "rx chain %d: iq corr coeff=%x\n", |
| chain_idx, iqc_coeff[1]); |
| |
| return true; |
| } |
| |
| static void ar9003_hw_detect_outlier(int *mp_coeff, int nmeasurement, |
| int max_delta) |
| { |
| int mp_max = -64, max_idx = 0; |
| int mp_min = 63, min_idx = 0; |
| int mp_avg = 0, i, outlier_idx = 0; |
| |
| /* find min/max mismatch across all calibrated gains */ |
| for (i = 0; i < nmeasurement; i++) { |
| mp_avg += mp_coeff[i]; |
| if (mp_coeff[i] > mp_max) { |
| mp_max = mp_coeff[i]; |
| max_idx = i; |
| } else if (mp_coeff[i] < mp_min) { |
| mp_min = mp_coeff[i]; |
| min_idx = i; |
| } |
| } |
| |
| /* find average (exclude max abs value) */ |
| for (i = 0; i < nmeasurement; i++) { |
| if ((abs(mp_coeff[i]) < abs(mp_max)) || |
| (abs(mp_coeff[i]) < abs(mp_min))) |
| mp_avg += mp_coeff[i]; |
| } |
| mp_avg /= (nmeasurement - 1); |
| |
| /* detect outlier */ |
| if (abs(mp_max - mp_min) > max_delta) { |
| if (abs(mp_max - mp_avg) > abs(mp_min - mp_avg)) |
| outlier_idx = max_idx; |
| else |
| outlier_idx = min_idx; |
| } |
| mp_coeff[outlier_idx] = mp_avg; |
| } |
| |
| static void ar9003_hw_tx_iqcal_load_avg_2_passes(struct ath_hw *ah, |
| u8 num_chains, |
| struct coeff *coeff) |
| { |
| int i, im, nmeasurement; |
| u32 tx_corr_coeff[MAX_MEASUREMENT][AR9300_MAX_CHAINS]; |
| |
| memset(tx_corr_coeff, 0, sizeof(tx_corr_coeff)); |
| for (i = 0; i < MAX_MEASUREMENT / 2; i++) { |
| tx_corr_coeff[i * 2][0] = tx_corr_coeff[(i * 2) + 1][0] = |
| AR_PHY_TX_IQCAL_CORR_COEFF_B0(i); |
| if (!AR_SREV_9485(ah)) { |
| tx_corr_coeff[i * 2][1] = |
| tx_corr_coeff[(i * 2) + 1][1] = |
| AR_PHY_TX_IQCAL_CORR_COEFF_B1(i); |
| |
| tx_corr_coeff[i * 2][2] = |
| tx_corr_coeff[(i * 2) + 1][2] = |
| AR_PHY_TX_IQCAL_CORR_COEFF_B2(i); |
| } |
| } |
| |
| /* Load the average of 2 passes */ |
| for (i = 0; i < num_chains; i++) { |
| nmeasurement = REG_READ_FIELD(ah, |
| AR_PHY_TX_IQCAL_STATUS_B0, |
| AR_PHY_CALIBRATED_GAINS_0); |
| |
| if (nmeasurement > MAX_MEASUREMENT) |
| nmeasurement = MAX_MEASUREMENT; |
| |
| /* detect outlier only if nmeasurement > 1 */ |
| if (nmeasurement > 1) { |
| /* Detect magnitude outlier */ |
| ar9003_hw_detect_outlier(coeff->mag_coeff[i], |
| nmeasurement, MAX_MAG_DELTA); |
| |
| /* Detect phase outlier */ |
| ar9003_hw_detect_outlier(coeff->phs_coeff[i], |
| nmeasurement, MAX_PHS_DELTA); |
| } |
| |
| for (im = 0; im < nmeasurement; im++) { |
| |
| coeff->iqc_coeff[0] = (coeff->mag_coeff[i][im] & 0x7f) | |
| ((coeff->phs_coeff[i][im] & 0x7f) << 7); |
| |
| if ((im % 2) == 0) |
| REG_RMW_FIELD(ah, tx_corr_coeff[im][i], |
| AR_PHY_TX_IQCAL_CORR_COEFF_00_COEFF_TABLE, |
| coeff->iqc_coeff[0]); |
| else |
| REG_RMW_FIELD(ah, tx_corr_coeff[im][i], |
| AR_PHY_TX_IQCAL_CORR_COEFF_01_COEFF_TABLE, |
| coeff->iqc_coeff[0]); |
| } |
| } |
| |
| REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_3, |
| AR_PHY_TX_IQCAL_CONTROL_3_IQCORR_EN, 0x1); |
| REG_RMW_FIELD(ah, AR_PHY_RX_IQCAL_CORR_B0, |
| AR_PHY_RX_IQCAL_CORR_B0_LOOPBACK_IQCORR_EN, 0x1); |
| |
| return; |
| |
| } |
| |
| static bool ar9003_hw_tx_iq_cal_run(struct ath_hw *ah) |
| { |
| struct ath_common *common = ath9k_hw_common(ah); |
| u8 tx_gain_forced; |
| |
| tx_gain_forced = REG_READ_FIELD(ah, AR_PHY_TX_FORCED_GAIN, |
| AR_PHY_TXGAIN_FORCE); |
| if (tx_gain_forced) |
| REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN, |
| AR_PHY_TXGAIN_FORCE, 0); |
| |
| REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_START, |
| AR_PHY_TX_IQCAL_START_DO_CAL, 1); |
| |
| if (!ath9k_hw_wait(ah, AR_PHY_TX_IQCAL_START, |
| AR_PHY_TX_IQCAL_START_DO_CAL, 0, |
| AH_WAIT_TIMEOUT)) { |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Tx IQ Cal is not completed.\n"); |
| return false; |
| } |
| return true; |
| } |
| |
| static void ar9003_hw_tx_iq_cal_post_proc(struct ath_hw *ah) |
| { |
| struct ath_common *common = ath9k_hw_common(ah); |
| const u32 txiqcal_status[AR9300_MAX_CHAINS] = { |
| AR_PHY_TX_IQCAL_STATUS_B0, |
| AR_PHY_TX_IQCAL_STATUS_B1, |
| AR_PHY_TX_IQCAL_STATUS_B2, |
| }; |
| const u_int32_t chan_info_tab[] = { |
| AR_PHY_CHAN_INFO_TAB_0, |
| AR_PHY_CHAN_INFO_TAB_1, |
| AR_PHY_CHAN_INFO_TAB_2, |
| }; |
| struct coeff coeff; |
| s32 iq_res[6]; |
| u8 num_chains = 0; |
| int i, im, j; |
| int nmeasurement; |
| |
| for (i = 0; i < AR9300_MAX_CHAINS; i++) { |
| if (ah->txchainmask & (1 << i)) |
| num_chains++; |
| } |
| |
| for (i = 0; i < num_chains; i++) { |
| nmeasurement = REG_READ_FIELD(ah, |
| AR_PHY_TX_IQCAL_STATUS_B0, |
| AR_PHY_CALIBRATED_GAINS_0); |
| if (nmeasurement > MAX_MEASUREMENT) |
| nmeasurement = MAX_MEASUREMENT; |
| |
| for (im = 0; im < nmeasurement; im++) { |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Doing Tx IQ Cal for chain %d.\n", i); |
| |
| if (REG_READ(ah, txiqcal_status[i]) & |
| AR_PHY_TX_IQCAL_STATUS_FAILED) { |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Tx IQ Cal failed for chain %d.\n", i); |
| goto tx_iqcal_fail; |
| } |
| |
| for (j = 0; j < 3; j++) { |
| u32 idx = 2 * j, offset = 4 * (3 * im + j); |
| |
| REG_RMW_FIELD(ah, |
| AR_PHY_CHAN_INFO_MEMORY, |
| AR_PHY_CHAN_INFO_TAB_S2_READ, |
| 0); |
| |
| /* 32 bits */ |
| iq_res[idx] = REG_READ(ah, |
| chan_info_tab[i] + |
| offset); |
| |
| REG_RMW_FIELD(ah, |
| AR_PHY_CHAN_INFO_MEMORY, |
| AR_PHY_CHAN_INFO_TAB_S2_READ, |
| 1); |
| |
| /* 16 bits */ |
| iq_res[idx + 1] = 0xffff & REG_READ(ah, |
| chan_info_tab[i] + offset); |
| |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "IQ RES[%d]=0x%x" |
| "IQ_RES[%d]=0x%x\n", |
| idx, iq_res[idx], idx + 1, |
| iq_res[idx + 1]); |
| } |
| |
| if (!ar9003_hw_calc_iq_corr(ah, i, iq_res, |
| coeff.iqc_coeff)) { |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "Failed in calculation of \ |
| IQ correction.\n"); |
| goto tx_iqcal_fail; |
| } |
| |
| coeff.mag_coeff[i][im] = coeff.iqc_coeff[0] & 0x7f; |
| coeff.phs_coeff[i][im] = |
| (coeff.iqc_coeff[0] >> 7) & 0x7f; |
| |
| if (coeff.mag_coeff[i][im] > 63) |
| coeff.mag_coeff[i][im] -= 128; |
| if (coeff.phs_coeff[i][im] > 63) |
| coeff.phs_coeff[i][im] -= 128; |
| } |
| } |
| ar9003_hw_tx_iqcal_load_avg_2_passes(ah, num_chains, &coeff); |
| |
| return; |
| |
| tx_iqcal_fail: |
| ath_dbg(common, ATH_DBG_CALIBRATE, "Tx IQ Cal failed\n"); |
| return; |
| } |
| static bool ar9003_hw_init_cal(struct ath_hw *ah, |
| struct ath9k_channel *chan) |
| { |
| struct ath_common *common = ath9k_hw_common(ah); |
| struct ath9k_hw_capabilities *pCap = &ah->caps; |
| int val; |
| bool txiqcal_done = false; |
| |
| val = REG_READ(ah, AR_ENT_OTP); |
| ath_dbg(common, ATH_DBG_CALIBRATE, "ath9k: AR_ENT_OTP 0x%x\n", val); |
| |
| /* Configure rx/tx chains before running AGC/TxiQ cals */ |
| if (val & AR_ENT_OTP_CHAIN2_DISABLE) |
| ar9003_hw_set_chain_masks(ah, 0x3, 0x3); |
| else |
| ar9003_hw_set_chain_masks(ah, pCap->rx_chainmask, |
| pCap->tx_chainmask); |
| |
| /* Do Tx IQ Calibration */ |
| REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_1, |
| AR_PHY_TX_IQCAL_CONTROL_1_IQCORR_I_Q_COFF_DELPT, |
| DELPT); |
| |
| /* |
| * For AR9485 or later chips, TxIQ cal runs as part of |
| * AGC calibration |
| */ |
| if (AR_SREV_9485_OR_LATER(ah)) |
| txiqcal_done = true; |
| else { |
| txiqcal_done = ar9003_hw_tx_iq_cal_run(ah); |
| REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_DIS); |
| udelay(5); |
| REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_EN); |
| } |
| |
| /* Calibrate the AGC */ |
| REG_WRITE(ah, AR_PHY_AGC_CONTROL, |
| REG_READ(ah, AR_PHY_AGC_CONTROL) | |
| AR_PHY_AGC_CONTROL_CAL); |
| |
| /* Poll for offset calibration complete */ |
| if (!ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL, |
| 0, AH_WAIT_TIMEOUT)) { |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "offset calibration failed to complete in 1ms; noisy environment?\n"); |
| return false; |
| } |
| |
| if (txiqcal_done) |
| ar9003_hw_tx_iq_cal_post_proc(ah); |
| |
| /* Revert chainmasks to their original values before NF cal */ |
| ar9003_hw_set_chain_masks(ah, ah->rxchainmask, ah->txchainmask); |
| |
| ath9k_hw_start_nfcal(ah, true); |
| |
| /* Initialize list pointers */ |
| ah->cal_list = ah->cal_list_last = ah->cal_list_curr = NULL; |
| ah->supp_cals = IQ_MISMATCH_CAL; |
| |
| if (ah->supp_cals & IQ_MISMATCH_CAL) { |
| INIT_CAL(&ah->iq_caldata); |
| INSERT_CAL(ah, &ah->iq_caldata); |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "enabling IQ Calibration.\n"); |
| } |
| |
| if (ah->supp_cals & TEMP_COMP_CAL) { |
| INIT_CAL(&ah->tempCompCalData); |
| INSERT_CAL(ah, &ah->tempCompCalData); |
| ath_dbg(common, ATH_DBG_CALIBRATE, |
| "enabling Temperature Compensation Calibration.\n"); |
| } |
| |
| /* Initialize current pointer to first element in list */ |
| ah->cal_list_curr = ah->cal_list; |
| |
| if (ah->cal_list_curr) |
| ath9k_hw_reset_calibration(ah, ah->cal_list_curr); |
| |
| if (ah->caldata) |
| ah->caldata->CalValid = 0; |
| |
| return true; |
| } |
| |
| void ar9003_hw_attach_calib_ops(struct ath_hw *ah) |
| { |
| struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah); |
| struct ath_hw_ops *ops = ath9k_hw_ops(ah); |
| |
| priv_ops->init_cal_settings = ar9003_hw_init_cal_settings; |
| priv_ops->init_cal = ar9003_hw_init_cal; |
| priv_ops->setup_calibration = ar9003_hw_setup_calibration; |
| |
| ops->calibrate = ar9003_hw_calibrate; |
| } |
