h[i].currIndex = 0;
if (h[i].invalidNFcount > 0) {
- if (nfarray[i] < AR_PHY_CCA_MIN_BAD_VALUE ||
- nfarray[i] > AR_PHY_CCA_MAX_HIGH_VALUE) {
- h[i].invalidNFcount = ATH9K_NF_CAL_HIST_MAX;
- } else {
- h[i].invalidNFcount--;
- h[i].privNF = nfarray[i];
- }
+ h[i].invalidNFcount--;
+ h[i].privNF = nfarray[i];
} else {
h[i].privNF =
ath9k_hw_get_nf_hist_mid(h[i].nfCalBuffer);
}
EXPORT_SYMBOL(ath9k_hw_reset_calvalid);
-void ath9k_hw_start_nfcal(struct ath_hw *ah)
+void ath9k_hw_start_nfcal(struct ath_hw *ah, bool update)
{
REG_SET_BIT(ah, AR_PHY_AGC_CONTROL,
AR_PHY_AGC_CONTROL_ENABLE_NF);
- REG_SET_BIT(ah, AR_PHY_AGC_CONTROL,
+
+ if (update)
+ REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL,
AR_PHY_AGC_CONTROL_NO_UPDATE_NF);
+ else
+ REG_SET_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);
}
+void ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan)
+{
+ struct ath9k_nfcal_hist *h;
+ unsigned i, j;
+ int32_t val;
+ u8 chainmask = (ah->rxchainmask << 3) | ah->rxchainmask;
+ struct ath_common *common = ath9k_hw_common(ah);
+
+ h = ah->nfCalHist;
+
+ for (i = 0; i < NUM_NF_READINGS; i++) {
+ if (chainmask & (1 << i)) {
+ val = REG_READ(ah, ah->nf_regs[i]);
+ val &= 0xFFFFFE00;
+ val |= (((u32) (h[i].privNF) << 1) & 0x1ff);
+ REG_WRITE(ah, ah->nf_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));
+ return;
+ }
+
+ /*
+ * 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.
+ */
+ ENABLE_REGWRITE_BUFFER(ah);
+ for (i = 0; i < NUM_NF_READINGS; i++) {
+ if (chainmask & (1 << i)) {
+ val = REG_READ(ah, ah->nf_regs[i]);
+ val &= 0xFFFFFE00;
+ val |= (((u32) (-50) << 1) & 0x1ff);
+ REG_WRITE(ah, ah->nf_regs[i], val);
+ }
+ }
+ REGWRITE_BUFFER_FLUSH(ah);
+ DISABLE_REGWRITE_BUFFER(ah);
+}
+
+
+static void ath9k_hw_nf_sanitize(struct ath_hw *ah, s16 *nf)
+{
+ struct ath_common *common = ath9k_hw_common(ah);
+ struct ath_nf_limits *limit;
+ int i;
+
+ if (IS_CHAN_2GHZ(ah->curchan))
+ limit = &ah->nf_2g;
+ else
+ limit = &ah->nf_5g;
+
+ for (i = 0; i < NUM_NF_READINGS; i++) {
+ if (!nf[i])
+ continue;
+
+ ath_print(common, ATH_DBG_CALIBRATE,
+ "NF calibrated [%s] [chain %d] is %d\n",
+ (i >= 3 ? "ext" : "ctl"), i % 3, nf[i]);
+
+ if (nf[i] > limit->max) {
+ ath_print(common, ATH_DBG_CALIBRATE,
+ "NF[%d] (%d) > MAX (%d), correcting to MAX",
+ i, nf[i], limit->max);
+ nf[i] = limit->max;
+ } else if (nf[i] < limit->min) {
+ ath_print(common, ATH_DBG_CALIBRATE,
+ "NF[%d] (%d) < MIN (%d), correcting to NOM",
+ i, nf[i], limit->min);
+ nf[i] = limit->nominal;
+ }
+ }
+}
+
int16_t ath9k_hw_getnf(struct ath_hw *ah,
struct ath9k_channel *chan)
{
return chan->rawNoiseFloor;
} else {
ath9k_hw_do_getnf(ah, nfarray);
+ ath9k_hw_nf_sanitize(ah, nfarray);
nf = nfarray[0];
if (ath9k_hw_get_nf_thresh(ah, c->band, &nfThresh)
&& nf > nfThresh) {
void ath9k_init_nfcal_hist_buffer(struct ath_hw *ah)
{
+ struct ath_nf_limits *limit;
int i, j;
- s16 noise_floor;
-
- if (AR_SREV_9280(ah))
- noise_floor = AR_PHY_CCA_MAX_AR9280_GOOD_VALUE;
- else if (AR_SREV_9285(ah) || AR_SREV_9271(ah))
- noise_floor = AR_PHY_CCA_MAX_AR9285_GOOD_VALUE;
- else if (AR_SREV_9287(ah))
- noise_floor = AR_PHY_CCA_MAX_AR9287_GOOD_VALUE;
+
+ if (!ah->curchan || IS_CHAN_2GHZ(ah->curchan))
+ limit = &ah->nf_2g;
else
- noise_floor = AR_PHY_CCA_MAX_AR5416_GOOD_VALUE;
+ limit = &ah->nf_5g;
for (i = 0; i < NUM_NF_READINGS; i++) {
ah->nfCalHist[i].currIndex = 0;
- ah->nfCalHist[i].privNF = noise_floor;
+ ah->nfCalHist[i].privNF = limit->nominal;
ah->nfCalHist[i].invalidNFcount =
AR_PHY_CCA_FILTERWINDOW_LENGTH;
for (j = 0; j < ATH9K_NF_CAL_HIST_MAX; j++) {
- ah->nfCalHist[i].nfCalBuffer[j] = noise_floor;
+ ah->nfCalHist[i].nfCalBuffer[j] = limit->nominal;
}
}
}
projects / karo-tx-linux.git / blobdiff