ath9k: fix various calibration related bugs and clean up the code

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22408 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 140 insertions, 0 deletions

diff --git a/package/mac80211/patches/523-ath9k_nfcal_timeout_handling.patch b/package/mac80211/patches/523-ath9k_nfcal_timeout_handling.patch
new file mode 100644
index 000000000..90363605e
--- /dev/null
+++ b/package/mac80211/patches/523-ath9k_nfcal_timeout_handling.patch
@@ -0,0 +1,140 @@
+--- a/drivers/net/wireless/ath/ath9k/hw.h
++++ b/drivers/net/wireless/ath/ath9k/hw.h
+@@ -354,6 +354,7 @@ struct ath9k_hw_cal_data {
+ 	int8_t qCoff;
+ 	int16_t rawNoiseFloor;
+ 	bool paprd_done;
++	bool nfcal_pending;
+ 	u16 small_signal_gain[AR9300_MAX_CHAINS];
+ 	u32 pa_table[AR9300_MAX_CHAINS][PAPRD_TABLE_SZ];
+ 	struct ath9k_nfcal_hist nfCalHist[NUM_NF_READINGS];
+--- a/drivers/net/wireless/ath/ath9k/calib.c
++++ b/drivers/net/wireless/ath/ath9k/calib.c
+@@ -156,6 +156,9 @@ EXPORT_SYMBOL(ath9k_hw_reset_calvalid);
+ 
+ void ath9k_hw_start_nfcal(struct ath_hw *ah)
+ {
++	if (ah->caldata)
++		ah->caldata->nfcal_pending = true;
++
+ 	REG_SET_BIT(ah, AR_PHY_AGC_CONTROL,
+ 		    AR_PHY_AGC_CONTROL_ENABLE_NF);
+ 	REG_SET_BIT(ah, AR_PHY_AGC_CONTROL,
+@@ -282,8 +285,7 @@ static void ath9k_hw_nf_sanitize(struct 
+ 	}
+ }
+ 
+-int16_t ath9k_hw_getnf(struct ath_hw *ah,
+-		       struct ath9k_channel *chan)
++bool ath9k_hw_getnf(struct ath_hw *ah, struct ath9k_channel *chan)
+ {
+ 	struct ath_common *common = ath9k_hw_common(ah);
+ 	int16_t nf, nfThresh;
+@@ -293,7 +295,7 @@ int16_t ath9k_hw_getnf(struct ath_hw *ah
+ 	struct ath9k_hw_cal_data *caldata = ah->caldata;
+ 
+ 	if (!caldata)
+-		return ath9k_hw_get_default_nf(ah, chan);
++		return false;
+ 
+ 	chan->channelFlags &= (~CHANNEL_CW_INT);
+ 	if (REG_READ(ah, AR_PHY_AGC_CONTROL) & AR_PHY_AGC_CONTROL_NF) {
+@@ -301,7 +303,7 @@ int16_t ath9k_hw_getnf(struct ath_hw *ah
+ 			  "NF did not complete in calibration window\n");
+ 		nf = 0;
+ 		caldata->rawNoiseFloor = nf;
+-		return caldata->rawNoiseFloor;
++		return false;
+ 	} else {
+ 		ath9k_hw_do_getnf(ah, nfarray);
+ 		ath9k_hw_nf_sanitize(ah, nfarray);
+@@ -317,11 +319,10 @@ int16_t ath9k_hw_getnf(struct ath_hw *ah
+ 	}
+ 
+ 	h = caldata->nfCalHist;
+-
++	caldata->nfcal_pending = false;
+ 	ath9k_hw_update_nfcal_hist_buffer(h, nfarray);
+ 	caldata->rawNoiseFloor = h[0].privNF;
+-
+-	return ah->caldata->rawNoiseFloor;
++	return true;
+ }
+ 
+ void ath9k_init_nfcal_hist_buffer(struct ath_hw *ah,
+--- a/drivers/net/wireless/ath/ath9k/ar9002_calib.c
++++ b/drivers/net/wireless/ath/ath9k/ar9002_calib.c
+@@ -687,8 +687,13 @@ static bool ar9002_hw_calibrate(struct a
+ {
+ 	bool iscaldone = true;
+ 	struct ath9k_cal_list *currCal = ah->cal_list_curr;
++	bool nfcal, nfcal_pending = false;
+ 
+-	if (currCal &&
++	nfcal = !!(REG_READ(ah, AR_PHY_AGC_CONTROL) & AR_PHY_AGC_CONTROL_NF);
++	if (ah->caldata)
++		nfcal_pending = ah->caldata->nfcal_pending;
++
++	if (currCal && !nfcal &&
+ 	    (currCal->calState == CAL_RUNNING ||
+ 	     currCal->calState == CAL_WAITING)) {
+ 		iscaldone = ar9002_hw_per_calibration(ah, chan,
+@@ -704,7 +709,7 @@ static bool ar9002_hw_calibrate(struct a
+ 	}
+ 
+ 	/* Do NF cal only at longer intervals */
+-	if (longcal) {
++	if (longcal || nfcal_pending) {
+ 		/* Do periodic PAOffset Cal */
+ 		ar9002_hw_pa_cal(ah, false);
+ 		ar9002_hw_olc_temp_compensation(ah);
+@@ -713,16 +718,18 @@ static bool ar9002_hw_calibrate(struct a
+ 		 * 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);
++		if (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);
++		}
+ 
+-		ath9k_hw_start_nfcal(ah);
++		if (longcal)
++			ath9k_hw_start_nfcal(ah);
+ 	}
+ 
+ 	return iscaldone;
+@@ -873,6 +880,9 @@ static bool ar9002_hw_init_cal(struct at
+ 	REG_WRITE(ah, AR_PHY_AGC_CONTROL,
+ 		  REG_READ(ah, AR_PHY_AGC_CONTROL) | AR_PHY_AGC_CONTROL_NF);
+ 
++	if (ah->caldata)
++		ah->caldata->nfcal_pending = true;
++
+ 	ah->cal_list = ah->cal_list_last = ah->cal_list_curr = NULL;
+ 
+ 	/* Enable IQ, ADC Gain and ADC DC offset CALs */
+--- a/drivers/net/wireless/ath/ath9k/calib.h
++++ b/drivers/net/wireless/ath/ath9k/calib.h
+@@ -110,8 +110,7 @@ struct ath9k_pacal_info{
+ bool ath9k_hw_reset_calvalid(struct ath_hw *ah);
+ void ath9k_hw_start_nfcal(struct ath_hw *ah);
+ void ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan);
+-int16_t ath9k_hw_getnf(struct ath_hw *ah,
+-		       struct ath9k_channel *chan);
++bool ath9k_hw_getnf(struct ath_hw *ah, struct ath9k_channel *chan);
+ void ath9k_init_nfcal_hist_buffer(struct ath_hw *ah,
+ 				  struct ath9k_channel *chan);
+ s16 ath9k_hw_getchan_noise(struct ath_hw *ah, struct ath9k_channel *chan);