This goes with some new shiny TX IQ calibration that AR9003
hardware family supports.
Signed-off-by: Luis R. Rodriguez <lrodriguez@xxxxxxxxxxx>
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@xxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/ar9003_calib.c | 574 ++++++++++++++++++++++++-
drivers/net/wireless/ath/ath9k/ar9003_phy.c | 100 +++++
drivers/net/wireless/ath/ath9k/eeprom.h | 1 +
drivers/net/wireless/ath/ath9k/hw.h | 1 +
4 files changed, 664 insertions(+), 12 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_calib.c b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
index ea151ee..498f60a 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_calib.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
@@ -58,20 +58,107 @@ static void ar9003_hw_setup_calibration(struct ath_hw *ah,
}
}
+/*
+ * 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)
{
- /* TODO */
- return false;
-}
+ 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);
+ }
+ }
+ }
-static bool ar9003_hw_init_cal(struct ath_hw *ah,
- struct ath9k_channel *chan)
-{
- /* TODO */
- return false;
+ /* Do NF cal only at longer intervals */
+ if (longcal) {
+ /*
+ * 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);
+ }
+
+ return iscaldone;
}
static void ar9003_hw_iqcal_collect(struct ath_hw *ah)
@@ -224,13 +311,477 @@ static void ar9003_hw_init_cal_settings(struct ath_hw *ah)
static bool ar9003_hw_iscal_supported(struct ath_hw *ah,
enum ath9k_cal_types calType)
{
- /* TODO */
+ 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;
}
-static void ar9003_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan)
+/*
+ * 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)
{
- /* TODO */
+ 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");
+ 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_modify_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_modify_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)
@@ -242,7 +793,6 @@ 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;
}
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_phy.c b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
index faa7d0f..c60f39f 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
@@ -816,6 +816,105 @@ 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);
@@ -835,4 +934,5 @@ 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;
}
diff --git a/drivers/net/wireless/ath/ath9k/eeprom.h b/drivers/net/wireless/ath/ath9k/eeprom.h
index e087e2d..c0cd717 100644
--- a/drivers/net/wireless/ath/ath9k/eeprom.h
+++ b/drivers/net/wireless/ath/ath9k/eeprom.h
@@ -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 */
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index b280bcb..7f49690 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -605,6 +605,7 @@ 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;
--
1.6.3.3
--
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