diff options
| author | Vasanthakumar Thiagarajan | 2009-09-07 14:16:49 +0200 |
|---|---|---|
| committer | John W. Linville | 2009-09-09 17:18:57 +0200 |
| commit | 7b6840ab5f836a18c4ea98173f73c8d046930efb (patch) | |
| tree | 61533a306fddb70e61cae6f37d5fb57973e59516 /drivers | |
| parent | MAINTAINERS: Add Atheros Linux wireless drivers home page (diff) | |
| download | kernel-qcow2-linux-7b6840ab5f836a18c4ea98173f73c8d046930efb.tar.gz kernel-qcow2-linux-7b6840ab5f836a18c4ea98173f73c8d046930efb.tar.xz kernel-qcow2-linux-7b6840ab5f836a18c4ea98173f73c8d046930efb.zip | |
ath9k: Disable ASPM when btcoex is active
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/hw.c | 14 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/hw.h | 5 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/main.c | 1 |
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 011b14f35e50..97a09dba76de 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 5ca6ffa70912..a592f1a46ecd 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 a69fda8a9102..ce011ab5e89d 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); } |