From a6bb860be4808d994410a0d945b351e5b56046e9 Mon Sep 17 00:00:00 2001
From: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Date: Tue, 24 Dec 2013 10:44:22 +0530
Subject: [PATCH] ath9k: Fix baseband watchdog interrupts
Program the required baseband watchdog interrupt
mask to ensure that the correct watchdog interrupts
are raised when the BB is hung for some reason.
Also, use the capability HW_BB_WATCHDOG instead of
relying on other flags.
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
drivers/net/wireless/ath/ath9k/mac.c | 24 +++++++++++++++++++++---
drivers/net/wireless/ath/ath9k/main.c | 8 +++++---
drivers/net/wireless/ath/ath9k/reg.h | 1 +
3 files changed, 27 insertions(+), 6 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c
index 89d7e206992b2..5f727588ca278 100644
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -922,11 +922,29 @@ void ath9k_hw_set_interrupts(struct ath_hw *ah)
mask2 |= AR_IMR_S2_CST;
}
+ if (ah->config.hw_hang_checks & HW_BB_WATCHDOG) {
+ if (ints & ATH9K_INT_BB_WATCHDOG) {
+ mask |= AR_IMR_BCNMISC;
+ mask2 |= AR_IMR_S2_BB_WATCHDOG;
+ }
+ }
+
ath_dbg(common, INTERRUPT, "new IMR 0x%x\n", mask);
REG_WRITE(ah, AR_IMR, mask);
- ah->imrs2_reg &= ~(AR_IMR_S2_TIM | AR_IMR_S2_DTIM | AR_IMR_S2_DTIMSYNC |
- AR_IMR_S2_CABEND | AR_IMR_S2_CABTO |
- AR_IMR_S2_TSFOOR | AR_IMR_S2_GTT | AR_IMR_S2_CST);
+ ah->imrs2_reg &= ~(AR_IMR_S2_TIM |
+ AR_IMR_S2_DTIM |
+ AR_IMR_S2_DTIMSYNC |
+ AR_IMR_S2_CABEND |
+ AR_IMR_S2_CABTO |
+ AR_IMR_S2_TSFOOR |
+ AR_IMR_S2_GTT |
+ AR_IMR_S2_CST);
+
+ if (ah->config.hw_hang_checks & HW_BB_WATCHDOG) {
+ if (ints & ATH9K_INT_BB_WATCHDOG)
+ ah->imrs2_reg &= ~AR_IMR_S2_BB_WATCHDOG;
+ }
+
ah->imrs2_reg |= mask2;
REG_WRITE(ah, AR_IMR_S2, ah->imrs2_reg);
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index ba00a31948166..1fd69de79020a 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -587,7 +587,7 @@ irqreturn_t ath_isr(int irq, void *dev)
!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
goto chip_reset;
- if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
+ if ((ah->config.hw_hang_checks & HW_BB_WATCHDOG) &&
(status & ATH9K_INT_BB_WATCHDOG)) {
spin_lock(&common->cc_lock);
@@ -726,11 +726,13 @@ static int ath9k_start(struct ieee80211_hw *hw)
if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
ah->imask |= ATH9K_INT_RXHP |
- ATH9K_INT_RXLP |
- ATH9K_INT_BB_WATCHDOG;
+ ATH9K_INT_RXLP;
else
ah->imask |= ATH9K_INT_RX;
+ if (ah->config.hw_hang_checks & HW_BB_WATCHDOG)
+ ah->imask |= ATH9K_INT_BB_WATCHDOG;
+
ah->imask |= ATH9K_INT_GTT;
if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
diff --git a/drivers/net/wireless/ath/ath9k/reg.h b/drivers/net/wireless/ath/ath9k/reg.h
index 9ad007312c9d4..c9a8b77774915 100644
--- a/drivers/net/wireless/ath/ath9k/reg.h
+++ b/drivers/net/wireless/ath/ath9k/reg.h
@@ -304,6 +304,7 @@
#define AR_IMR_S2 0x00ac
#define AR_IMR_S2_QCU_TXURN 0x000003FF
#define AR_IMR_S2_QCU_TXURN_S 0
+#define AR_IMR_S2_BB_WATCHDOG 0x00010000
#define AR_IMR_S2_CST 0x00400000
#define AR_IMR_S2_GTT 0x00800000
#define AR_IMR_S2_TIM 0x01000000
--
2.30.2