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ath9k_hw: complete AR9003 calibration
This goes with some new shiny TX IQ calibration that AR9003 hardware family supports. Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com> Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Luis R. Rodriguez
John W. Linville
parent
4b01931e3a
commit
df23acaa5d
@ -58,20 +58,108 @@ static void ar9003_hw_setup_calibration(struct ath_hw *ah,
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}
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}
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/*
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* Generic calibration routine.
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* Recalibrate the lower PHY chips to account for temperature/environment
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* changes.
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*/
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static bool ar9003_hw_per_calibration(struct ath_hw *ah,
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struct ath9k_channel *ichan,
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u8 rxchainmask,
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struct ath9k_cal_list *currCal)
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{
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/* Cal is assumed not done until explicitly set below */
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bool iscaldone = false;
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/* Calibration in progress. */
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if (currCal->calState == CAL_RUNNING) {
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/* Check to see if it has finished. */
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if (!(REG_READ(ah, AR_PHY_TIMING4) & AR_PHY_TIMING4_DO_CAL)) {
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/*
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* Accumulate cal measures for active chains
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*/
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currCal->calData->calCollect(ah);
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ah->cal_samples++;
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if (ah->cal_samples >=
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currCal->calData->calNumSamples) {
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unsigned int i, numChains = 0;
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for (i = 0; i < AR9300_MAX_CHAINS; i++) {
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if (rxchainmask & (1 << i))
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numChains++;
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}
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/*
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* Process accumulated data
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*/
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currCal->calData->calPostProc(ah, numChains);
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/* Calibration has finished. */
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ichan->CalValid |= currCal->calData->calType;
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currCal->calState = CAL_DONE;
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iscaldone = true;
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} else {
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/*
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* Set-up collection of another sub-sample until we
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* get desired number
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*/
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ar9003_hw_setup_calibration(ah, currCal);
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}
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}
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} else if (!(ichan->CalValid & currCal->calData->calType)) {
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/* If current cal is marked invalid in channel, kick it off */
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ath9k_hw_reset_calibration(ah, currCal);
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}
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return iscaldone;
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}
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static bool ar9003_hw_calibrate(struct ath_hw *ah,
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struct ath9k_channel *chan,
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u8 rxchainmask,
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bool longcal)
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{
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/* TODO */
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return false;
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}
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bool iscaldone = true;
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struct ath9k_cal_list *currCal = ah->cal_list_curr;
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static bool ar9003_hw_init_cal(struct ath_hw *ah,
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struct ath9k_channel *chan)
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{
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/* TODO */
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return false;
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/*
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* For given calibration:
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* 1. Call generic cal routine
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* 2. When this cal is done (isCalDone) if we have more cals waiting
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* (eg after reset), mask this to upper layers by not propagating
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* isCalDone if it is set to TRUE.
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* Instead, change isCalDone to FALSE and setup the waiting cal(s)
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* to be run.
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*/
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if (currCal &&
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(currCal->calState == CAL_RUNNING ||
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currCal->calState == CAL_WAITING)) {
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iscaldone = ar9003_hw_per_calibration(ah, chan,
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rxchainmask, currCal);
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if (iscaldone) {
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ah->cal_list_curr = currCal = currCal->calNext;
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if (currCal->calState == CAL_WAITING) {
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iscaldone = false;
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ath9k_hw_reset_calibration(ah, currCal);
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}
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}
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}
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/* Do NF cal only at longer intervals */
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if (longcal) {
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/*
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* Load the NF from history buffer of the current channel.
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* NF is slow time-variant, so it is OK to use a historical
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* value.
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*/
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ath9k_hw_loadnf(ah, ah->curchan);
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/* start NF calibration, without updating BB NF register */
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ath9k_hw_start_nfcal(ah);
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}
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return iscaldone;
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}
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static void ar9003_hw_iqcal_collect(struct ath_hw *ah)
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@ -225,13 +313,479 @@ static void ar9003_hw_init_cal_settings(struct ath_hw *ah)
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static bool ar9003_hw_iscal_supported(struct ath_hw *ah,
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enum ath9k_cal_types calType)
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{
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/* TODO */
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switch (calType & ah->supp_cals) {
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case IQ_MISMATCH_CAL:
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/*
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* XXX: Run IQ Mismatch for non-CCK only
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* Note that CHANNEL_B is never set though.
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*/
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return true;
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case ADC_GAIN_CAL:
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case ADC_DC_CAL:
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return false;
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case TEMP_COMP_CAL:
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return true;
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}
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return false;
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}
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static void ar9003_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan)
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/*
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* solve 4x4 linear equation used in loopback iq cal.
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*/
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static bool ar9003_hw_solve_iq_cal(struct ath_hw *ah,
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s32 sin_2phi_1,
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s32 cos_2phi_1,
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s32 sin_2phi_2,
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s32 cos_2phi_2,
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s32 mag_a0_d0,
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s32 phs_a0_d0,
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s32 mag_a1_d0,
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s32 phs_a1_d0,
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s32 solved_eq[])
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{
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/* TODO */
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s32 f1 = cos_2phi_1 - cos_2phi_2,
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f3 = sin_2phi_1 - sin_2phi_2,
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f2;
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s32 mag_tx, phs_tx, mag_rx, phs_rx;
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const s32 result_shift = 1 << 15;
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struct ath_common *common = ath9k_hw_common(ah);
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f2 = (f1 * f1 + f3 * f3) / result_shift;
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if (!f2) {
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ath_print(common, ATH_DBG_CALIBRATE, "Divide by 0\n");
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return false;
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}
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/* mag mismatch, tx */
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mag_tx = f1 * (mag_a0_d0 - mag_a1_d0) + f3 * (phs_a0_d0 - phs_a1_d0);
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/* phs mismatch, tx */
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phs_tx = f3 * (-mag_a0_d0 + mag_a1_d0) + f1 * (phs_a0_d0 - phs_a1_d0);
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mag_tx = (mag_tx / f2);
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phs_tx = (phs_tx / f2);
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/* mag mismatch, rx */
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mag_rx = mag_a0_d0 - (cos_2phi_1 * mag_tx + sin_2phi_1 * phs_tx) /
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result_shift;
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/* phs mismatch, rx */
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phs_rx = phs_a0_d0 + (sin_2phi_1 * mag_tx - cos_2phi_1 * phs_tx) /
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result_shift;
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solved_eq[0] = mag_tx;
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solved_eq[1] = phs_tx;
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solved_eq[2] = mag_rx;
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solved_eq[3] = phs_rx;
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return true;
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}
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static s32 ar9003_hw_find_mag_approx(struct ath_hw *ah, s32 in_re, s32 in_im)
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{
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s32 abs_i = abs(in_re),
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abs_q = abs(in_im),
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max_abs, min_abs;
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if (abs_i > abs_q) {
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max_abs = abs_i;
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min_abs = abs_q;
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} else {
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max_abs = abs_q;
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min_abs = abs_i;
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}
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return max_abs - (max_abs / 32) + (min_abs / 8) + (min_abs / 4);
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}
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#define DELPT 32
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static bool ar9003_hw_calc_iq_corr(struct ath_hw *ah,
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s32 chain_idx,
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const s32 iq_res[],
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s32 iqc_coeff[])
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{
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s32 i2_m_q2_a0_d0, i2_p_q2_a0_d0, iq_corr_a0_d0,
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i2_m_q2_a0_d1, i2_p_q2_a0_d1, iq_corr_a0_d1,
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i2_m_q2_a1_d0, i2_p_q2_a1_d0, iq_corr_a1_d0,
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i2_m_q2_a1_d1, i2_p_q2_a1_d1, iq_corr_a1_d1;
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s32 mag_a0_d0, mag_a1_d0, mag_a0_d1, mag_a1_d1,
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phs_a0_d0, phs_a1_d0, phs_a0_d1, phs_a1_d1,
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sin_2phi_1, cos_2phi_1,
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sin_2phi_2, cos_2phi_2;
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s32 mag_tx, phs_tx, mag_rx, phs_rx;
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s32 solved_eq[4], mag_corr_tx, phs_corr_tx, mag_corr_rx, phs_corr_rx,
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q_q_coff, q_i_coff;
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const s32 res_scale = 1 << 15;
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const s32 delpt_shift = 1 << 8;
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s32 mag1, mag2;
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struct ath_common *common = ath9k_hw_common(ah);
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i2_m_q2_a0_d0 = iq_res[0] & 0xfff;
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i2_p_q2_a0_d0 = (iq_res[0] >> 12) & 0xfff;
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iq_corr_a0_d0 = ((iq_res[0] >> 24) & 0xff) + ((iq_res[1] & 0xf) << 8);
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if (i2_m_q2_a0_d0 > 0x800)
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i2_m_q2_a0_d0 = -((0xfff - i2_m_q2_a0_d0) + 1);
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if (i2_p_q2_a0_d0 > 0x800)
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i2_p_q2_a0_d0 = -((0xfff - i2_p_q2_a0_d0) + 1);
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if (iq_corr_a0_d0 > 0x800)
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iq_corr_a0_d0 = -((0xfff - iq_corr_a0_d0) + 1);
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i2_m_q2_a0_d1 = (iq_res[1] >> 4) & 0xfff;
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i2_p_q2_a0_d1 = (iq_res[2] & 0xfff);
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iq_corr_a0_d1 = (iq_res[2] >> 12) & 0xfff;
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if (i2_m_q2_a0_d1 > 0x800)
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i2_m_q2_a0_d1 = -((0xfff - i2_m_q2_a0_d1) + 1);
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if (i2_p_q2_a0_d1 > 0x800)
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i2_p_q2_a0_d1 = -((0xfff - i2_p_q2_a0_d1) + 1);
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if (iq_corr_a0_d1 > 0x800)
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iq_corr_a0_d1 = -((0xfff - iq_corr_a0_d1) + 1);
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i2_m_q2_a1_d0 = ((iq_res[2] >> 24) & 0xff) + ((iq_res[3] & 0xf) << 8);
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i2_p_q2_a1_d0 = (iq_res[3] >> 4) & 0xfff;
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iq_corr_a1_d0 = iq_res[4] & 0xfff;
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if (i2_m_q2_a1_d0 > 0x800)
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i2_m_q2_a1_d0 = -((0xfff - i2_m_q2_a1_d0) + 1);
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if (i2_p_q2_a1_d0 > 0x800)
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i2_p_q2_a1_d0 = -((0xfff - i2_p_q2_a1_d0) + 1);
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if (iq_corr_a1_d0 > 0x800)
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iq_corr_a1_d0 = -((0xfff - iq_corr_a1_d0) + 1);
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i2_m_q2_a1_d1 = (iq_res[4] >> 12) & 0xfff;
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i2_p_q2_a1_d1 = ((iq_res[4] >> 24) & 0xff) + ((iq_res[5] & 0xf) << 8);
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iq_corr_a1_d1 = (iq_res[5] >> 4) & 0xfff;
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if (i2_m_q2_a1_d1 > 0x800)
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i2_m_q2_a1_d1 = -((0xfff - i2_m_q2_a1_d1) + 1);
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if (i2_p_q2_a1_d1 > 0x800)
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i2_p_q2_a1_d1 = -((0xfff - i2_p_q2_a1_d1) + 1);
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if (iq_corr_a1_d1 > 0x800)
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iq_corr_a1_d1 = -((0xfff - iq_corr_a1_d1) + 1);
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if ((i2_p_q2_a0_d0 == 0) || (i2_p_q2_a0_d1 == 0) ||
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(i2_p_q2_a1_d0 == 0) || (i2_p_q2_a1_d1 == 0)) {
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ath_print(common, ATH_DBG_CALIBRATE,
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"Divide by 0:\na0_d0=%d\n"
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"a0_d1=%d\na2_d0=%d\na1_d1=%d\n",
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i2_p_q2_a0_d0, i2_p_q2_a0_d1,
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i2_p_q2_a1_d0, i2_p_q2_a1_d1);
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return false;
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}
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mag_a0_d0 = (i2_m_q2_a0_d0 * res_scale) / i2_p_q2_a0_d0;
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phs_a0_d0 = (iq_corr_a0_d0 * res_scale) / i2_p_q2_a0_d0;
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mag_a0_d1 = (i2_m_q2_a0_d1 * res_scale) / i2_p_q2_a0_d1;
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phs_a0_d1 = (iq_corr_a0_d1 * res_scale) / i2_p_q2_a0_d1;
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mag_a1_d0 = (i2_m_q2_a1_d0 * res_scale) / i2_p_q2_a1_d0;
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phs_a1_d0 = (iq_corr_a1_d0 * res_scale) / i2_p_q2_a1_d0;
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mag_a1_d1 = (i2_m_q2_a1_d1 * res_scale) / i2_p_q2_a1_d1;
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phs_a1_d1 = (iq_corr_a1_d1 * res_scale) / i2_p_q2_a1_d1;
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/* w/o analog phase shift */
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sin_2phi_1 = (((mag_a0_d0 - mag_a0_d1) * delpt_shift) / DELPT);
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/* w/o analog phase shift */
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cos_2phi_1 = (((phs_a0_d1 - phs_a0_d0) * delpt_shift) / DELPT);
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/* w/ analog phase shift */
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sin_2phi_2 = (((mag_a1_d0 - mag_a1_d1) * delpt_shift) / DELPT);
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/* w/ analog phase shift */
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cos_2phi_2 = (((phs_a1_d1 - phs_a1_d0) * delpt_shift) / DELPT);
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/*
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* force sin^2 + cos^2 = 1;
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* find magnitude by approximation
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*/
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mag1 = ar9003_hw_find_mag_approx(ah, cos_2phi_1, sin_2phi_1);
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mag2 = ar9003_hw_find_mag_approx(ah, cos_2phi_2, sin_2phi_2);
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if ((mag1 == 0) || (mag2 == 0)) {
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ath_print(common, ATH_DBG_CALIBRATE,
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"Divide by 0: mag1=%d, mag2=%d\n",
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mag1, mag2);
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return false;
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}
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/* normalization sin and cos by mag */
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sin_2phi_1 = (sin_2phi_1 * res_scale / mag1);
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cos_2phi_1 = (cos_2phi_1 * res_scale / mag1);
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sin_2phi_2 = (sin_2phi_2 * res_scale / mag2);
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cos_2phi_2 = (cos_2phi_2 * res_scale / mag2);
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/* calculate IQ mismatch */
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if (!ar9003_hw_solve_iq_cal(ah,
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sin_2phi_1, cos_2phi_1,
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sin_2phi_2, cos_2phi_2,
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mag_a0_d0, phs_a0_d0,
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mag_a1_d0,
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phs_a1_d0, solved_eq)) {
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ath_print(common, ATH_DBG_CALIBRATE,
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"Call to ar9003_hw_solve_iq_cal() failed.\n");
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return false;
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}
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mag_tx = solved_eq[0];
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phs_tx = solved_eq[1];
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mag_rx = solved_eq[2];
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phs_rx = solved_eq[3];
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ath_print(common, ATH_DBG_CALIBRATE,
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"chain %d: mag mismatch=%d phase mismatch=%d\n",
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chain_idx, mag_tx/res_scale, phs_tx/res_scale);
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if (res_scale == mag_tx) {
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ath_print(common, ATH_DBG_CALIBRATE,
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"Divide by 0: mag_tx=%d, res_scale=%d\n",
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mag_tx, res_scale);
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return false;
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}
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/* calculate and quantize Tx IQ correction factor */
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mag_corr_tx = (mag_tx * res_scale) / (res_scale - mag_tx);
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phs_corr_tx = -phs_tx;
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q_q_coff = (mag_corr_tx * 128 / res_scale);
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q_i_coff = (phs_corr_tx * 256 / res_scale);
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ath_print(common, ATH_DBG_CALIBRATE,
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"tx chain %d: mag corr=%d phase corr=%d\n",
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chain_idx, q_q_coff, q_i_coff);
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if (q_i_coff < -63)
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q_i_coff = -63;
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if (q_i_coff > 63)
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q_i_coff = 63;
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if (q_q_coff < -63)
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q_q_coff = -63;
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if (q_q_coff > 63)
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q_q_coff = 63;
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iqc_coeff[0] = (q_q_coff * 128) + q_i_coff;
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||||
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");
|
||||
return;
|
||||
}
|
||||
|
||||
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);
|
||||
|
||||
/* 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;
|
||||
}
|
||||
|
||||
/* Do Tx IQ Calibration */
|
||||
ar9003_hw_tx_iq_cal(ah);
|
||||
|
||||
/* Revert chainmasks to their original values before NF cal */
|
||||
ar9003_hw_set_chain_masks(ah, ah->rxchainmask, ah->txchainmask);
|
||||
|
||||
/* 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)
|
||||
@ -243,7 +797,6 @@ void ar9003_hw_attach_calib_ops(struct ath_hw *ah)
|
||||
priv_ops->init_cal = ar9003_hw_init_cal;
|
||||
priv_ops->setup_calibration = ar9003_hw_setup_calibration;
|
||||
priv_ops->iscal_supported = ar9003_hw_iscal_supported;
|
||||
priv_ops->loadnf = ar9003_hw_loadnf;
|
||||
|
||||
ops->calibrate = ar9003_hw_calibrate;
|
||||
}
|
||||
|
||||
@ -814,6 +814,105 @@ void ar9003_hw_set_nf_limits(struct ath_hw *ah)
|
||||
ah->nf_5g_min = AR_PHY_CCA_MIN_GOOD_VAL_9300_5GHZ;
|
||||
}
|
||||
|
||||
/*
|
||||
* Find out which of the RX chains are enabled
|
||||
*/
|
||||
static u32 ar9003_hw_get_rx_chainmask(struct ath_hw *ah)
|
||||
{
|
||||
u32 chain = REG_READ(ah, AR_PHY_RX_CHAINMASK);
|
||||
/*
|
||||
* The bits [2:0] indicate the rx chain mask and are to be
|
||||
* interpreted as follows:
|
||||
* 00x => Only chain 0 is enabled
|
||||
* 01x => Chain 1 and 0 enabled
|
||||
* 1xx => Chain 2,1 and 0 enabled
|
||||
*/
|
||||
return chain & 0x7;
|
||||
}
|
||||
|
||||
static void ar9003_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan)
|
||||
{
|
||||
struct ath9k_nfcal_hist *h;
|
||||
unsigned i, j;
|
||||
int32_t val;
|
||||
const u32 ar9300_cca_regs[6] = {
|
||||
AR_PHY_CCA_0,
|
||||
AR_PHY_CCA_1,
|
||||
AR_PHY_CCA_2,
|
||||
AR_PHY_EXT_CCA,
|
||||
AR_PHY_EXT_CCA_1,
|
||||
AR_PHY_EXT_CCA_2,
|
||||
};
|
||||
u8 chainmask, rx_chain_status;
|
||||
struct ath_common *common = ath9k_hw_common(ah);
|
||||
|
||||
rx_chain_status = ar9003_hw_get_rx_chainmask(ah);
|
||||
|
||||
chainmask = 0x3F;
|
||||
h = ah->nfCalHist;
|
||||
|
||||
for (i = 0; i < NUM_NF_READINGS; i++) {
|
||||
if (chainmask & (1 << i)) {
|
||||
val = REG_READ(ah, ar9300_cca_regs[i]);
|
||||
val &= 0xFFFFFE00;
|
||||
val |= (((u32) (h[i].privNF) << 1) & 0x1ff);
|
||||
REG_WRITE(ah, ar9300_cca_regs[i], val);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Load software filtered NF value into baseband internal minCCApwr
|
||||
* variable.
|
||||
*/
|
||||
REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL,
|
||||
AR_PHY_AGC_CONTROL_ENABLE_NF);
|
||||
REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL,
|
||||
AR_PHY_AGC_CONTROL_NO_UPDATE_NF);
|
||||
REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF);
|
||||
|
||||
/*
|
||||
* Wait for load to complete, should be fast, a few 10s of us.
|
||||
* The max delay was changed from an original 250us to 10000us
|
||||
* since 250us often results in NF load timeout and causes deaf
|
||||
* condition during stress testing 12/12/2009
|
||||
*/
|
||||
for (j = 0; j < 1000; j++) {
|
||||
if ((REG_READ(ah, AR_PHY_AGC_CONTROL) &
|
||||
AR_PHY_AGC_CONTROL_NF) == 0)
|
||||
break;
|
||||
udelay(10);
|
||||
}
|
||||
|
||||
/*
|
||||
* We timed out waiting for the noisefloor to load, probably due to an
|
||||
* in-progress rx. Simply return here and allow the load plenty of time
|
||||
* to complete before the next calibration interval. We need to avoid
|
||||
* trying to load -50 (which happens below) while the previous load is
|
||||
* still in progress as this can cause rx deafness. Instead by returning
|
||||
* here, the baseband nf cal will just be capped by our present
|
||||
* noisefloor until the next calibration timer.
|
||||
*/
|
||||
if (j == 1000) {
|
||||
ath_print(common, ATH_DBG_ANY, "Timeout while waiting for nf "
|
||||
"to load: AR_PHY_AGC_CONTROL=0x%x\n",
|
||||
REG_READ(ah, AR_PHY_AGC_CONTROL));
|
||||
}
|
||||
|
||||
/*
|
||||
* Restore maxCCAPower register parameter again so that we're not capped
|
||||
* by the median we just loaded. This will be initial (and max) value
|
||||
* of next noise floor calibration the baseband does.
|
||||
*/
|
||||
for (i = 0; i < NUM_NF_READINGS; i++) {
|
||||
if (chainmask & (1 << i)) {
|
||||
val = REG_READ(ah, ar9300_cca_regs[i]);
|
||||
val &= 0xFFFFFE00;
|
||||
val |= (((u32) (-50) << 1) & 0x1ff);
|
||||
REG_WRITE(ah, ar9300_cca_regs[i], val);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void ar9003_hw_attach_phy_ops(struct ath_hw *ah)
|
||||
{
|
||||
struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah);
|
||||
@ -833,4 +932,5 @@ void ar9003_hw_attach_phy_ops(struct ath_hw *ah)
|
||||
priv_ops->set_diversity = ar9003_hw_set_diversity;
|
||||
priv_ops->ani_control = ar9003_hw_ani_control;
|
||||
priv_ops->do_getnf = ar9003_hw_do_getnf;
|
||||
priv_ops->loadnf = ar9003_hw_loadnf;
|
||||
}
|
||||
|
||||
@ -155,6 +155,7 @@
|
||||
#define AR5416_BCHAN_UNUSED 0xFF
|
||||
#define AR5416_MAX_PWR_RANGE_IN_HALF_DB 64
|
||||
#define AR5416_MAX_CHAINS 3
|
||||
#define AR9300_MAX_CHAINS 3
|
||||
#define AR5416_PWR_TABLE_OFFSET_DB -5
|
||||
|
||||
/* Rx gain type values */
|
||||
|
||||
@ -611,6 +611,7 @@ struct ath_hw {
|
||||
struct ath9k_cal_list adcgain_caldata;
|
||||
struct ath9k_cal_list adcdc_calinitdata;
|
||||
struct ath9k_cal_list adcdc_caldata;
|
||||
struct ath9k_cal_list tempCompCalData;
|
||||
struct ath9k_cal_list *cal_list;
|
||||
struct ath9k_cal_list *cal_list_last;
|
||||
struct ath9k_cal_list *cal_list_curr;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user