Return-path: Received: from wolverine02.qualcomm.com ([199.106.114.251]:38264 "EHLO wolverine02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932401Ab2CNJLS (ORCPT ); Wed, 14 Mar 2012 05:11:18 -0400 From: Sujith Manoharan MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Message-ID: <20320.24726.682393.111484@gargle.gargle.HOWL> (sfid-20120314_101121_664025_B374E3D1) Date: Wed, 14 Mar 2012 14:40:46 +0530 To: CC: , Subject: [PATCH 4/6] ath9k_hw: Cleanup FastChannelChange Sender: linux-wireless-owner@vger.kernel.org List-ID: The logic to determine whether to use FCC is a bit convoluted. Use a small helper function to decide whether FCC is to be used. Signed-off-by: Sujith Manoharan --- drivers/net/wireless/ath/ath9k/hw.c | 104 +++++++++++++++++++++++---------- drivers/net/wireless/ath/ath9k/hw.h | 2 +- drivers/net/wireless/ath/ath9k/main.c | 4 -- 3 files changed, 74 insertions(+), 36 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index 02cc1ce..780ecd8 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -1521,17 +1521,81 @@ bool ath9k_hw_check_alive(struct ath_hw *ah) } EXPORT_SYMBOL(ath9k_hw_check_alive); +/* + * Fast channel change: + * (Change synthesizer based on channel freq without resetting chip) + * + * Don't do FCC when + * - Flag is not set + * - Chip is just coming out of full sleep + * - Channel to be set is same as current channel + * - Channel flags are different, (eg.,moving from 2GHz to 5GHz channel) + */ +static int ath9k_hw_do_fastcc(struct ath_hw *ah, struct ath9k_channel *chan) +{ + struct ath_common *common = ath9k_hw_common(ah); + int ret; + + if (AR_SREV_9280(ah) && common->bus_ops->ath_bus_type == ATH_PCI) + goto fail; + + if (ah->chip_fullsleep) + goto fail; + + if (!ah->curchan) + goto fail; + + if (chan->channel == ah->curchan->channel) + goto fail; + + if ((chan->channelFlags & CHANNEL_ALL) != + (ah->curchan->channelFlags & CHANNEL_ALL)) + goto fail; + + if (!ath9k_hw_check_alive(ah)) + goto fail; + + /* + * For AR9462, make sure that calibration data for + * re-using are present. + */ + if (AR_SREV_9462(ah) && (!ah->caldata || + !ah->caldata->done_txiqcal_once || + !ah->caldata->done_txclcal_once || + !ah->caldata->rtt_hist.num_readings)) + goto fail; + + ath_dbg(common, RESET, "FastChannelChange for %d -> %d\n", + ah->curchan->channel, chan->channel); + + ret = ath9k_hw_channel_change(ah, chan); + if (!ret) + goto fail; + + ath9k_hw_loadnf(ah, ah->curchan); + ath9k_hw_start_nfcal(ah, true); + + if ((ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && ar9003_mci_is_ready(ah)) + ar9003_mci_2g5g_switch(ah, true); + + if (AR_SREV_9271(ah)) + ar9002_hw_load_ani_reg(ah, chan); + + return 0; +fail: + return -EINVAL; +} + int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan, - struct ath9k_hw_cal_data *caldata, bool bChannelChange) + struct ath9k_hw_cal_data *caldata, bool fastcc) { struct ath_common *common = ath9k_hw_common(ah); u32 saveLedState; - struct ath9k_channel *curchan = ah->curchan; u32 saveDefAntenna; u32 macStaId1; u64 tsf = 0; int i, r; - bool allow_fbs = false, start_mci_reset = false; + bool start_mci_reset = false; bool mci = !!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI); bool save_fullsleep = ah->chip_fullsleep; @@ -1544,8 +1608,8 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan, if (!ath9k_hw_setpower(ah, ATH9K_PM_AWAKE)) return -EIO; - if (curchan && !ah->chip_fullsleep) - ath9k_hw_getnf(ah, curchan); + if (ah->curchan && !ah->chip_fullsleep) + ath9k_hw_getnf(ah, ah->curchan); ah->caldata = caldata; if (caldata && @@ -1558,32 +1622,10 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan, } ah->noise = ath9k_hw_getchan_noise(ah, chan); - if (AR_SREV_9280(ah) && common->bus_ops->ath_bus_type == ATH_PCI) - bChannelChange = false; - - if (caldata && - caldata->done_txiqcal_once && - caldata->done_txclcal_once && - caldata->rtt_hist.num_readings) - allow_fbs = true; - - if (bChannelChange && - (ah->chip_fullsleep != true) && - (ah->curchan != NULL) && - (chan->channel != ah->curchan->channel) && - (allow_fbs || - ((chan->channelFlags & CHANNEL_ALL) == - (ah->curchan->channelFlags & CHANNEL_ALL)))) { - if (ath9k_hw_channel_change(ah, chan)) { - ath9k_hw_loadnf(ah, ah->curchan); - ath9k_hw_start_nfcal(ah, true); - if (mci && ar9003_mci_is_ready(ah)) - ar9003_mci_2g5g_switch(ah, true); - - if (AR_SREV_9271(ah)) - ar9002_hw_load_ani_reg(ah, chan); - return 0; - } + if (fastcc) { + r = ath9k_hw_do_fastcc(ah, chan); + if (!r) + return r; } if (mci) diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h index 1707137..23c8dfa 100644 --- a/drivers/net/wireless/ath/ath9k/hw.h +++ b/drivers/net/wireless/ath/ath9k/hw.h @@ -924,7 +924,7 @@ const char *ath9k_hw_probe(u16 vendorid, u16 devid); void ath9k_hw_deinit(struct ath_hw *ah); int ath9k_hw_init(struct ath_hw *ah); int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan, - struct ath9k_hw_cal_data *caldata, bool bChannelChange); + struct ath9k_hw_cal_data *caldata, bool fastcc); int ath9k_hw_fill_cap_info(struct ath_hw *ah); u32 ath9k_regd_get_ctl(struct ath_regulatory *reg, struct ath9k_channel *chan); diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c index 77c61bc..a07565c 100644 --- a/drivers/net/wireless/ath/ath9k/main.c +++ b/drivers/net/wireless/ath/ath9k/main.c @@ -334,10 +334,6 @@ static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan, hchan = ah->curchan; } - if (fastcc && (ah->chip_fullsleep || - !ath9k_hw_check_alive(ah))) - fastcc = false; - if (!ath_prepare_reset(sc, retry_tx, flush)) fastcc = false; -- 1.7.9.4