ath9k_hw: Disable PAPRD based on paprd_ht20_mask for 5GHz
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_paprd.c b/drivers/net/wireless/ath/ath9k/ar9003_paprd.c
index de19723..f80d1d6 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_paprd.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_paprd.c
@@ -21,6 +21,36 @@
{
struct ath_regulatory *regulatory = ath9k_hw_regulatory(ah);
struct ath9k_channel *chan = ah->curchan;
+ struct ar9300_eeprom *eep = &ah->eeprom.ar9300_eep;
+
+ /*
+ * 3 bits for modalHeader5G.papdRateMaskHt20
+ * is used for sub-band disabling of PAPRD.
+ * 5G band is divided into 3 sub-bands -- upper,
+ * middle, lower.
+ * if bit 30 of modalHeader5G.papdRateMaskHt20 is set
+ * -- disable PAPRD for upper band 5GHz
+ * if bit 29 of modalHeader5G.papdRateMaskHt20 is set
+ * -- disable PAPRD for middle band 5GHz
+ * if bit 28 of modalHeader5G.papdRateMaskHt20 is set
+ * -- disable PAPRD for lower band 5GHz
+ */
+
+ if (IS_CHAN_5GHZ(chan)) {
+ if (chan->channel >= UPPER_5G_SUB_BAND_START) {
+ if (le32_to_cpu(eep->modalHeader5G.papdRateMaskHt20)
+ & BIT(30))
+ val = false;
+ } else if (chan->channel >= MID_5G_SUB_BAND_START) {
+ if (le32_to_cpu(eep->modalHeader5G.papdRateMaskHt20)
+ & BIT(29))
+ val = false;
+ } else {
+ if (le32_to_cpu(eep->modalHeader5G.papdRateMaskHt20)
+ & BIT(28))
+ val = false;
+ }
+ }
if (val) {
ah->paprd_table_write_done = true;
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 818acdd..a1c3174 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -143,6 +143,8 @@
#define AR_KEYTABLE_SIZE 128
#define POWER_UP_TIME 10000
#define SPUR_RSSI_THRESH 40
+#define UPPER_5G_SUB_BAND_START 5700
+#define MID_5G_SUB_BAND_START 5400
#define CAB_TIMEOUT_VAL 10
#define BEACON_TIMEOUT_VAL 10