From 8060e169e02fe855f5533b5ef6af1f23ae2db0c4 Mon Sep 17 00:00:00 2001 From: Vasanthakumar Thiagarajan Date: Mon, 6 Dec 2010 04:27:42 -0800 Subject: [PATCH] ath9k: Enable extended synch for AR9485 to fix L0s recovery issue Signed-off-by: Vasanthakumar Thiagarajan Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath.h | 1 + drivers/net/wireless/ath/ath9k/hw.c | 5 +++++ drivers/net/wireless/ath/ath9k/hw.h | 2 ++ drivers/net/wireless/ath/ath9k/main.c | 3 +++ drivers/net/wireless/ath/ath9k/pci.c | 12 ++++++++++++ 5 files changed, 23 insertions(+) diff --git a/drivers/net/wireless/ath/ath.h b/drivers/net/wireless/ath/ath.h index c914f5213c61..dd78ad13ea03 100644 --- a/drivers/net/wireless/ath/ath.h +++ b/drivers/net/wireless/ath/ath.h @@ -131,6 +131,7 @@ struct ath_bus_ops { void (*read_cachesize)(struct ath_common *common, int *csz); bool (*eeprom_read)(struct ath_common *common, u32 off, u16 *data); void (*bt_coex_prep)(struct ath_common *common); + void (*extn_synch_en)(struct ath_common *common); }; struct ath_common { diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index 66b4a2acafda..49da1849c7fe 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -1971,6 +1971,11 @@ int ath9k_hw_fill_cap_info(struct ath_hw *ah) + if (AR_SREV_9485_10(ah)) { + pCap->pcie_lcr_extsync_en = true; + pCap->pcie_lcr_offset = 0x80; + } + return 0; } diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h index 0649ae6b33dd..76ae3296e3fc 100644 --- a/drivers/net/wireless/ath/ath9k/hw.h +++ b/drivers/net/wireless/ath/ath9k/hw.h @@ -209,6 +209,8 @@ struct ath9k_hw_capabilities { u8 rx_status_len; u8 tx_desc_len; u8 txs_len; + u16 pcie_lcr_offset; + bool pcie_lcr_extsync_en; }; struct ath9k_ops_config { diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c index a59cfce3335a..3e0c8a1874b4 100644 --- a/drivers/net/wireless/ath/ath9k/main.c +++ b/drivers/net/wireless/ath/ath9k/main.c @@ -1179,6 +1179,9 @@ static int ath9k_start(struct ieee80211_hw *hw) pm_qos_update_request(&sc->pm_qos_req, 55); + if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en) + common->bus_ops->extn_synch_en(common); + mutex_unlock: mutex_unlock(&sc->mutex); diff --git a/drivers/net/wireless/ath/ath9k/pci.c b/drivers/net/wireless/ath/ath9k/pci.c index 71339dab0860..38d2221241b8 100644 --- a/drivers/net/wireless/ath/ath9k/pci.c +++ b/drivers/net/wireless/ath/ath9k/pci.c @@ -103,11 +103,23 @@ static void ath_pci_bt_coex_prep(struct ath_common *common) pci_write_config_byte(pdev, ATH_PCIE_CAP_LINK_CTRL, aspm); } +static void ath_pci_extn_synch_enable(struct ath_common *common) +{ + struct ath_softc *sc = (struct ath_softc *) common->priv; + struct pci_dev *pdev = to_pci_dev(sc->dev); + u8 lnkctl; + + pci_read_config_byte(pdev, sc->sc_ah->caps.pcie_lcr_offset, &lnkctl); + lnkctl |= PCI_EXP_LNKCTL_ES; + pci_write_config_byte(pdev, sc->sc_ah->caps.pcie_lcr_offset, lnkctl); +} + static const struct ath_bus_ops ath_pci_bus_ops = { .ath_bus_type = ATH_PCI, .read_cachesize = ath_pci_read_cachesize, .eeprom_read = ath_pci_eeprom_read, .bt_coex_prep = ath_pci_bt_coex_prep, + .extn_synch_en = ath_pci_extn_synch_enable, }; static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) -- 2.20.1