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authorVasanthakumar Thiagarajan <vasanth@atheros.com>2009-09-07 17:46:49 +0530
committerJohn W. Linville <linville@tuxdriver.com>2009-09-09 11:18:57 -0400
commit7b6840ab5f836a18c4ea98173f73c8d046930efb (patch)
tree61533a306fddb70e61cae6f37d5fb57973e59516
parent72c706b775777e8ae546756a5d07ffda4a05ed7b (diff)
ath9k: Disable ASPM when btcoex is active
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--drivers/net/wireless/ath/ath9k/hw.c14
-rw-r--r--drivers/net/wireless/ath/ath9k/hw.h5
-rw-r--r--drivers/net/wireless/ath/ath9k/main.c1
3 files changed, 20 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 011b14f35e5..97a09dba76d 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -16,6 +16,7 @@
#include <linux/io.h>
#include <asm/unaligned.h>
+#include <linux/pci.h>
#include "ath9k.h"
#include "initvals.h"
@@ -4298,3 +4299,16 @@ void ath_gen_timer_isr(struct ath_hw *ah)
timer->trigger(timer->arg);
}
}
+
+/*
+ * Primitive to disable ASPM
+ */
+void ath_pcie_aspm_disable(struct ath_softc *sc)
+{
+ struct pci_dev *pdev = to_pci_dev(sc->dev);
+ u8 aspm;
+
+ pci_read_config_byte(pdev, ATH_PCIE_CAP_LINK_CTRL, &aspm);
+ aspm &= ~(ATH_PCIE_CAP_LINK_L0S | ATH_PCIE_CAP_LINK_L1);
+ pci_write_config_byte(pdev, ATH_PCIE_CAP_LINK_CTRL, aspm);
+}
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 5ca6ffa7091..a592f1a46ec 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -665,4 +665,9 @@ void ath_gen_timer_free(struct ath_hw *ah, struct ath_gen_timer *timer);
void ath_gen_timer_isr(struct ath_hw *hw);
u32 ath9k_hw_gettsf32(struct ath_hw *ah);
+#define ATH_PCIE_CAP_LINK_CTRL 0x70
+#define ATH_PCIE_CAP_LINK_L0S 1
+#define ATH_PCIE_CAP_LINK_L1 2
+
+void ath_pcie_aspm_disable(struct ath_softc *sc);
#endif
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index a69fda8a910..ce011ab5e89 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -2010,6 +2010,7 @@ static int ath9k_start(struct ieee80211_hw *hw)
AR_STOMP_LOW_WLAN_WGHT);
ath9k_hw_btcoex_enable(sc->sc_ah);
+ ath_pcie_aspm_disable(sc);
if (sc->btcoex_info.btcoex_scheme == ATH_BTCOEX_CFG_3WIRE)
ath_btcoex_timer_resume(sc, &sc->btcoex_info);
}