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authorFelix Fietkau <nbd@openwrt.org>2010-07-02 00:09:50 +0200
committerJohn W. Linville <linville@tuxdriver.com>2010-07-02 13:44:36 -0400
commitf2552e28375cb34073a2f940ee9a8439c37d9ec2 (patch)
tree85c718798e4f64cbc2ddd1beb93541722719d69e /drivers/net/wireless/ath/ath9k/calib.c
parentba17bc5e55ba541d2a8765fca53b6883b667ab21 (diff)
ath9k_hw: sanitize noise floor values properly on all chips
This refactors the noise floor range checks to make them generic, and adds proper ranges for each supported chip type. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/calib.c')
-rw-r--r--drivers/net/wireless/ath/ath9k/calib.c57
1 files changed, 39 insertions, 18 deletions
diff --git a/drivers/net/wireless/ath/ath9k/calib.c b/drivers/net/wireless/ath/ath9k/calib.c
index 07b8fa6fb62..7f49b7511bf 100644
--- a/drivers/net/wireless/ath/ath9k/calib.c
+++ b/drivers/net/wireless/ath/ath9k/calib.c
@@ -74,13 +74,8 @@ static void ath9k_hw_update_nfcal_hist_buffer(struct ath9k_nfcal_hist *h,
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);
@@ -172,6 +167,35 @@ void ath9k_hw_start_nfcal(struct ath_hw *ah)
REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF);
}
+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;
+
+ 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)
{
@@ -190,6 +214,7 @@ int16_t ath9k_hw_getnf(struct ath_hw *ah,
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) {
@@ -211,25 +236,21 @@ int16_t ath9k_hw_getnf(struct ath_hw *ah,
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;
}
}
}