From 522bba5e421e47323975876faa0fee091ed8eb0b Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sun, 7 Feb 2016 13:29:08 +0000
Subject: [PATCH] ath9k: merge fix for noise floor calibration
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 48641
---
...F-load-complete-quickly-and-reliably.patch | 87 +++++++++++++++++++
.../522-mac80211_configure_antenna_gain.patch | 6 +-
.../patches/530-ath9k_extra_leds.patch | 6 +-
3 files changed, 93 insertions(+), 6 deletions(-)
create mode 100644 package/kernel/mac80211/patches/326-ath9k-make-NF-load-complete-quickly-and-reliably.patch
diff --git a/package/kernel/mac80211/patches/326-ath9k-make-NF-load-complete-quickly-and-reliably.patch b/package/kernel/mac80211/patches/326-ath9k-make-NF-load-complete-quickly-and-reliably.patch
new file mode 100644
index 0000000000..71f7a40433
--- /dev/null
+++ b/package/kernel/mac80211/patches/326-ath9k-make-NF-load-complete-quickly-and-reliably.patch
@@ -0,0 +1,87 @@
+From: Miaoqing Pan <miaoqing@codeaurora.org>
+Date: Fri, 5 Feb 2016 09:45:50 +0800
+Subject: [PATCH] ath9k: make NF load complete quickly and reliably
+
+Make NF load complete quickly and reliably. NF load execution
+is delayed by HW to end of frame if frame Rx or Tx is ongoing.
+Increasing timeout to max frame duration. If NF cal is ongoing
+before NF load, stop it before load, and restart it afterwards.
+
+Signed-off-by: Miaoqing Pan <miaoqing@codeaurora.org>
+---
+
+--- a/drivers/net/wireless/ath/ath9k/calib.c
++++ b/drivers/net/wireless/ath/ath9k/calib.c
+@@ -241,6 +241,7 @@ int ath9k_hw_loadnf(struct ath_hw *ah, s
+ u8 chainmask = (ah->rxchainmask << 3) | ah->rxchainmask;
+ struct ath_common *common = ath9k_hw_common(ah);
+ s16 default_nf = ath9k_hw_get_default_nf(ah, chan);
++ u32 bb_agc_ctl = REG_READ(ah, AR_PHY_AGC_CONTROL);
+
+ if (ah->caldata)
+ h = ah->caldata->nfCalHist;
+@@ -264,6 +265,16 @@ int ath9k_hw_loadnf(struct ath_hw *ah, s
+ }
+
+ /*
++ * stop NF cal if ongoing to ensure NF load completes immediately
++ * (or after end rx/tx frame if ongoing)
++ */
++ if (bb_agc_ctl & AR_PHY_AGC_CONTROL_NF) {
++ REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF);
++ REG_RMW_BUFFER_FLUSH(ah);
++ ENABLE_REG_RMW_BUFFER(ah);
++ }
++
++ /*
+ * Load software filtered NF value into baseband internal minCCApwr
+ * variable.
+ */
+@@ -276,18 +287,33 @@ int ath9k_hw_loadnf(struct ath_hw *ah, s
+
+ /*
+ * 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
++ * The max delay was changed from an original 250us to 22.2 msec.
++ * This would increase timeout to the longest possible frame
++ * (11n max length 22.1 msec)
+ */
+- for (j = 0; j < 10000; j++) {
++ for (j = 0; j < 22200; j++) {
+ if ((REG_READ(ah, AR_PHY_AGC_CONTROL) &
+- AR_PHY_AGC_CONTROL_NF) == 0)
++ AR_PHY_AGC_CONTROL_NF) == 0)
+ break;
+ udelay(10);
+ }
+
+ /*
++ * Restart NF so it can continue.
++ */
++ if (bb_agc_ctl & AR_PHY_AGC_CONTROL_NF) {
++ ENABLE_REG_RMW_BUFFER(ah);
++ if (bb_agc_ctl & AR_PHY_AGC_CONTROL_ENABLE_NF)
++ REG_SET_BIT(ah, AR_PHY_AGC_CONTROL,
++ AR_PHY_AGC_CONTROL_ENABLE_NF);
++ if (bb_agc_ctl & AR_PHY_AGC_CONTROL_NO_UPDATE_NF)
++ 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);
++ REG_RMW_BUFFER_FLUSH(ah);
++ }
++
++ /*
+ * 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
+@@ -296,7 +322,7 @@ int ath9k_hw_loadnf(struct ath_hw *ah, s
+ * here, the baseband nf cal will just be capped by our present
+ * noisefloor until the next calibration timer.
+ */
+- if (j == 10000) {
++ if (j == 22200) {
+ ath_dbg(common, ANY,
+ "Timeout while waiting for nf to load: AR_PHY_AGC_CONTROL=0x%x\n",
+ REG_READ(ah, AR_PHY_AGC_CONTROL));
diff --git a/package/kernel/mac80211/patches/522-mac80211_configure_antenna_gain.patch b/package/kernel/mac80211/patches/522-mac80211_configure_antenna_gain.patch
index ef9258b418..e151a12967 100644
--- a/package/kernel/mac80211/patches/522-mac80211_configure_antenna_gain.patch
+++ b/package/kernel/mac80211/patches/522-mac80211_configure_antenna_gain.patch
@@ -18,7 +18,7 @@
const u8 *addr);
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
-@@ -1282,6 +1282,7 @@ enum ieee80211_smps_mode {
+@@ -1286,6 +1286,7 @@ enum ieee80211_smps_mode {
*
* @power_level: requested transmit power (in dBm), backward compatibility
* value only that is set to the minimum of all interfaces
@@ -26,7 +26,7 @@
*
* @chandef: the channel definition to tune to
* @radar_enabled: whether radar detection is enabled
-@@ -1302,6 +1303,7 @@ enum ieee80211_smps_mode {
+@@ -1306,6 +1307,7 @@ enum ieee80211_smps_mode {
struct ieee80211_conf {
u32 flags;
int power_level, dynamic_ps_timeout;
@@ -87,7 +87,7 @@
CFG80211_TESTMODE_CMD(ieee80211_testmode_cmd)
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
-@@ -1317,6 +1317,7 @@ struct ieee80211_local {
+@@ -1318,6 +1318,7 @@ struct ieee80211_local {
int dynamic_ps_forced_timeout;
int user_power_level; /* in dBm, for all interfaces */
diff --git a/package/kernel/mac80211/patches/530-ath9k_extra_leds.patch b/package/kernel/mac80211/patches/530-ath9k_extra_leds.patch
index 50ddd0b9d9..5a5e4643f5 100644
--- a/package/kernel/mac80211/patches/530-ath9k_extra_leds.patch
+++ b/package/kernel/mac80211/patches/530-ath9k_extra_leds.patch
@@ -54,7 +54,8 @@
+ (brightness != LED_OFF) ^ led->gpio->active_low);
+ ath9k_ps_restore(sc);
+}
-+
+
+- ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, val);
+static int ath_add_led(struct ath_softc *sc, struct ath_led *led)
+{
+ const struct gpio_led *gpio = led->gpio;
@@ -63,8 +64,7 @@
+ led->cdev.name = gpio->name;
+ led->cdev.default_trigger = gpio->default_trigger;
+ led->cdev.brightness_set = ath_led_brightness;
-
-- ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, val);
++
+ ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &led->cdev);
+ if (ret < 0)
+ return ret;
--
2.25.1