/* * Copyright (c) 2010 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" 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_print(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_print(common, ATH_DBG_CALIBRATE, "starting Temperature Compensation Calibration\n"); break; case ADC_DC_INIT_CAL: case ADC_GAIN_CAL: case ADC_DC_CAL: /* Not yet */ 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) { /* 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. */ ichan->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 (!(ichan->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++) { 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_print(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; 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_print(common, ATH_DBG_CALIBRATE, "Starting IQ Cal and Correction for Chain %d\n", i); ath_print(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_print(common, ATH_DBG_CALIBRATE, "Chn %d pwr_meas_i = 0x%08x\n", i, powerMeasI); ath_print(common, ATH_DBG_CALIBRATE, "Chn %d pwr_meas_q = 0x%08x\n", i, powerMeasQ); ath_print(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_print(common, ATH_DBG_CALIBRATE, "Chn %d iCoff = 0x%08x\n", i, iCoff); ath_print(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_print(common, ATH_DBG_CALIBRATE, "Chn %d : iCoff = 0x%x qCoff = 0x%x\n", i, iCoff, qCoff); ath_print(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_print(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_print(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_print(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_print(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; ah->supp_cals = IQ_MISMATCH_CAL; } static bool ar9003_hw_iscal_supported(struct ath_hw *ah, enum ath9k_cal_types calType) { switch (calType & ah->supp_cals) { case IQ_MISMATCH_CAL: /* * XXX: Run IQ Mismatch for non-CCK only * Note that CHANNEL_B is never set though. */ return true; case ADC_GAIN_CAL: case ADC_DC_CAL: return false; case TEMP_COMP_CAL: return true; } return false; } /* * 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_print(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_print(common, ATH_DBG_CALIBRATE, "Divide by 0:\na0_d0=%d\n" "a0_d1=%d\na2_d0=%d\na1_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_print(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_print(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_print(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_print(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_print(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_print(common, ATH_DBG_CALIBRATE, "tx chain %d: iq corr coeff=%x\n", chain_idx, iqc_coeff[0]); if (-mag_rx == res_scale) { ath_print(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_print(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_print(common, ATH_DBG_CALIBRATE, "rx chain %d: iq corr coeff=%x\n", chain_idx, iqc_coeff[1]); return true; } static void ar9003_hw_tx_iq_cal(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 u32 tx_corr_coeff[AR9300_MAX_CHAINS] = { AR_PHY_TX_IQCAL_CORR_COEFF_01_B0, AR_PHY_TX_IQCAL_CORR_COEFF_01_B1, AR_PHY_TX_IQCAL_CORR_COEFF_01_B2, }; const u32 rx_corr[AR9300_MAX_CHAINS] = { AR_PHY_RX_IQCAL_CORR_B0, AR_PHY_RX_IQCAL_CORR_B1, AR_PHY_RX_IQCAL_CORR_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, }; s32 iq_res[6]; s32 iqc_coeff[2]; s32 i, j; u32 num_chains = 0; for (i = 0; i < AR9300_MAX_CHAINS; i++) { if (ah->txchainmask & (1 << i)) num_chains++; } REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_CONTROL_1, AR_PHY_TX_IQCAQL_CONTROL_1_IQCORR_I_Q_COFF_DELPT, DELPT); REG_RMW_FIELD(ah, AR_PHY_TX_IQCAL_START, AR_PHY_TX_IQCAL_START_DO_CAL, AR_PHY_TX_IQCAL_START_DO_CAL); if (!ath9k_hw_wait(ah, AR_PHY_TX_IQCAL_START, AR_PHY_TX_IQCAL_START_DO_CAL, 0, AH_WAIT_TIMEOUT)) { ath_print(common, ATH_DBG_CALIBRATE, "Tx IQ Cal not complete.\n"); goto TX_IQ_CAL_FAILED; } for (i = 0; i < num_chains; i++) { ath_print(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_print(common, ATH_DBG_CALIBRATE, "Tx IQ Cal failed for chain %d.\n", i); goto TX_IQ_CAL_FAILED; } for (j = 0; j < 3; j++) { u_int8_t idx = 2 * j, offset = 4 * 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_print(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, iqc_coeff)) { ath_print(common, ATH_DBG_CALIBRATE, "Failed in calculation of IQ correction.\n"); goto TX_IQ_CAL_FAILED; } ath_print(common, ATH_DBG_CALIBRATE, "IQ_COEFF[0] = 0x%x IQ_COEFF[1] = 0x%x\n", iqc_coeff[0], iqc_coeff[1]); REG_RMW_FIELD(ah, tx_corr_coeff[i], AR_PHY_TX_IQCAL_CORR_COEFF_01_COEFF_TABLE, iqc_coeff[0]); REG_RMW_FIELD(ah, rx_corr[i], AR_PHY_RX_IQCAL_CORR_LOOPBACK_IQCORR_Q_Q_COFF, iqc_coeff[1] >> 7); REG_RMW_FIELD(ah, rx_corr[i], AR_PHY_RX_IQCAL_CORR_LOOPBACK_IQCORR_Q_I_COFF, iqc_coeff[1]); } 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; TX_IQ_CAL_FAILED: ath_print(common, ATH_DBG_CALIBRATE, "Tx IQ Cal failed\n"); } static bool ar9003_hw_init_cal(struct ath_hw *ah, struct ath9k_channel *chan) { struct ath_common *common = ath9k_hw_common(ah); /* * 0x7 = 0b111 , AR9003 needs to be configured for 3-chain mode before * running AGC/TxIQ cals */ ar9003_hw_set_chain_masks(ah, 0x7, 0x7); /* Do Tx IQ Calibration */ ar9003_hw_tx_iq_cal(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_print(common, ATH_DBG_CALIBRATE, "offset calibration failed to " "complete in 1ms; noisy environment?\n"); return false; } /* 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; if (ar9003_hw_iscal_supported(ah, IQ_MISMATCH_CAL)) { INIT_CAL(&ah->iq_caldata); INSERT_CAL(ah, &ah->iq_caldata); ath_print(common, ATH_DBG_CALIBRATE, "enabling IQ Calibration.\n"); } if (ar9003_hw_iscal_supported(ah, TEMP_COMP_CAL)) { INIT_CAL(&ah->tempCompCalData); INSERT_CAL(ah, &ah->tempCompCalData); ath_print(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); chan->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; priv_ops->iscal_supported = ar9003_hw_iscal_supported; ops->calibrate = ar9003_hw_calibrate; }