From a9f042cbe5284f34ccff15f3084477e11b39b17b Mon Sep 17 00:00:00 2001 From: Ming Lei Date: Sun, 28 Feb 2010 00:56:24 +0800 Subject: ath9k: fix lockdep warning when unloading module Since txq->axq_lock may be hold in softirq context, it must be acquired with spin_lock_bh() instead of spin_lock() if softieq is enabled. The patch fixes the lockdep warning below when unloading ath9k modules. ================================= [ INFO: inconsistent lock state ] 2.6.33-wl #12 --------------------------------- inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage. rmmod/3642 [HC0[0]:SC0[0]:HE1:SE1] takes: (&(&txq->axq_lock)->rlock){+.?...}, at: [] ath_tx_node_cleanup+0x62/0x180 [ath9k] {IN-SOFTIRQ-W} state was registered at: [] __lock_acquire+0x2f6/0xd35 [] lock_acquire+0xcd/0xf1 [] _raw_spin_lock_bh+0x3b/0x6e [] spin_lock_bh+0xe/0x10 [ath9k] [] ath_tx_tasklet+0xcd/0x391 [ath9k] [] ath9k_tasklet+0x70/0xc8 [ath9k] [] tasklet_action+0x8c/0xf4 [] __do_softirq+0xf8/0x1cd [] call_softirq+0x1c/0x30 [] do_softirq+0x4b/0xa3 [] irq_exit+0x4a/0x8c [] do_IRQ+0xac/0xc3 [] ret_from_intr+0x0/0x16 [] cpuidle_idle_call+0x9e/0xf8 [] cpu_idle+0x62/0x9d [] rest_init+0x7e/0x80 [] start_kernel+0x3e8/0x3f3 [] x86_64_start_reservations+0xa7/0xab [] x86_64_start_kernel+0xf8/0x107 irq event stamp: 42037 hardirqs last enabled at (42037): [] _raw_spin_unlock_irqrestore+0x47/0x56 hardirqs last disabled at (42036): [] _raw_spin_lock_irqsave+0x2b/0x88 softirqs last enabled at (42000): [] spin_unlock_bh+0xe/0x10 [ath9k] softirqs last disabled at (41998): [] _raw_spin_lock_bh+0x18/0x6e other info that might help us debug this: 4 locks held by rmmod/3642: #0: (rtnl_mutex){+.+.+.}, at: [] rtnl_lock+0x17/0x19 #1: (&wdev->mtx){+.+.+.}, at: [] cfg80211_netdev_notifier_call+0x28d/0x46d [cfg80211] #2: (&ifmgd->mtx){+.+.+.}, at: [] ieee80211_mgd_deauth+0x3f/0x17e [mac80211] #3: (&local->sta_mtx){+.+.+.}, at: [] sta_info_destroy_addr+0x2b/0x5e [mac80211] stack backtrace: Pid: 3642, comm: rmmod Not tainted 2.6.33-wl #12 Call Trace: [] valid_state+0x178/0x18b [] ? save_stack_trace+0x2f/0x4c [] ? check_usage_backwards+0x0/0x88 [] mark_lock+0x113/0x230 [] __lock_acquire+0x36a/0xd35 [] ? native_sched_clock+0x2d/0x5f [] ? ath_tx_node_cleanup+0x62/0x180 [ath9k] [] lock_acquire+0xcd/0xf1 [] ? ath_tx_node_cleanup+0x62/0x180 [ath9k] [] ? trace_hardirqs_off+0xd/0xf [] _raw_spin_lock+0x36/0x69 [] ? ath_tx_node_cleanup+0x62/0x180 [ath9k] [] ath_tx_node_cleanup+0x62/0x180 [ath9k] [] ? trace_hardirqs_on+0xd/0xf [] ath9k_sta_remove+0x22/0x26 [ath9k] [] __sta_info_destroy+0x1ad/0x38c [mac80211] [] sta_info_destroy_addr+0x3e/0x5e [mac80211] [] ieee80211_set_disassoc+0x175/0x180 [mac80211] [] ieee80211_mgd_deauth+0x58/0x17e [mac80211] [] ? __mutex_lock_common+0x37f/0x3a4 [] ? cfg80211_netdev_notifier_call+0x28d/0x46d [cfg80211] [] ieee80211_deauth+0x1e/0x20 [mac80211] [] __cfg80211_mlme_deauth+0x130/0x13f [cfg80211] [] ? cfg80211_netdev_notifier_call+0x28d/0x46d [cfg80211] [] ? trace_hardirqs_off+0xd/0xf [] __cfg80211_disconnect+0x111/0x189 [cfg80211] [] cfg80211_netdev_notifier_call+0x2ce/0x46d [cfg80211] [] notifier_call_chain+0x37/0x63 [] raw_notifier_call_chain+0x14/0x16 [] call_netdevice_notifiers+0x1b/0x1d [] dev_close+0x6a/0xa6 [] rollback_registered_many+0xb6/0x2f4 [] unregister_netdevice_many+0x1b/0x66 [] ieee80211_remove_interfaces+0xc5/0xd0 [mac80211] [] ieee80211_unregister_hw+0x47/0xe8 [mac80211] [] ath9k_deinit_device+0x7a/0x9b [ath9k] [] ath_pci_remove+0x38/0x76 [ath9k] [] pci_device_remove+0x2d/0x51 [] __device_release_driver+0x7b/0xd1 [] driver_detach+0x98/0xbe [] bus_remove_driver+0x94/0xb7 [] driver_unregister+0x6c/0x74 [] pci_unregister_driver+0x46/0xad [] ath_pci_exit+0x15/0x17 [ath9k] [] ath9k_exit+0xe/0x2f [ath9k] [] sys_delete_module+0x1c7/0x236 [] ? retint_swapgs+0x13/0x1b [] ? trace_hardirqs_on_caller+0x119/0x144 [] ? audit_syscall_entry+0x11e/0x14a [] system_call_fastpath+0x16/0x1b wlan1: deauthenticating from 00:23:cd:e1:f9:b2 by local choice (reason=3) PM: Removing info for No Bus:wlan1 cfg80211: Calling CRDA to update world regulatory domain PM: Removing info for No Bus:rfkill2 PM: Removing info for No Bus:phy1 ath9k 0000:16:00.0: PCI INT A disabled Signed-off-by: Ming Lei Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/xmit.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/net/wireless/ath') diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c index 47294f90bbe5..b2c8207f7bc1 100644 --- a/drivers/net/wireless/ath/ath9k/xmit.c +++ b/drivers/net/wireless/ath/ath9k/xmit.c @@ -2258,7 +2258,7 @@ void ath_tx_node_cleanup(struct ath_softc *sc, struct ath_node *an) if (ATH_TXQ_SETUP(sc, i)) { txq = &sc->tx.txq[i]; - spin_lock(&txq->axq_lock); + spin_lock_bh(&txq->axq_lock); list_for_each_entry_safe(ac, ac_tmp, &txq->axq_acq, list) { @@ -2279,7 +2279,7 @@ void ath_tx_node_cleanup(struct ath_softc *sc, struct ath_node *an) } } - spin_unlock(&txq->axq_lock); + spin_unlock_bh(&txq->axq_lock); } } } -- cgit v1.2.3 From 535765179fd4e8af26b69d2240d7ec33702a370a Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 23 Dec 2009 13:15:30 +0100 Subject: ar9170: load firmware asynchronously This converts ar9170 to load firmware asynchronously out of ->probe() and only register with mac80211 when all firmware has been loaded successfully. If, on the other hand, any firmware fails to load, it will now unbind from the device. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ar9170/ar9170.h | 1 + drivers/net/wireless/ath/ar9170/main.c | 10 +- drivers/net/wireless/ath/ar9170/usb.c | 170 +++++++++++++++++++------------ 3 files changed, 111 insertions(+), 70 deletions(-) (limited to 'drivers/net/wireless/ath') diff --git a/drivers/net/wireless/ath/ar9170/ar9170.h b/drivers/net/wireless/ath/ar9170/ar9170.h index 8c8ce67971e9..dc662b76a1c8 100644 --- a/drivers/net/wireless/ath/ar9170/ar9170.h +++ b/drivers/net/wireless/ath/ar9170/ar9170.h @@ -166,6 +166,7 @@ struct ar9170 { struct ath_common common; struct mutex mutex; enum ar9170_device_state state; + bool registered; unsigned long bad_hw_nagger; int (*open)(struct ar9170 *); diff --git a/drivers/net/wireless/ath/ar9170/main.c b/drivers/net/wireless/ath/ar9170/main.c index 8a964f130367..f4650fcdebc9 100644 --- a/drivers/net/wireless/ath/ar9170/main.c +++ b/drivers/net/wireless/ath/ar9170/main.c @@ -2701,7 +2701,8 @@ int ar9170_register(struct ar9170 *ar, struct device *pdev) dev_info(pdev, "Atheros AR9170 is registered as '%s'\n", wiphy_name(ar->hw->wiphy)); - return err; + ar->registered = true; + return 0; err_unreg: ieee80211_unregister_hw(ar->hw); @@ -2712,11 +2713,14 @@ err_out: void ar9170_unregister(struct ar9170 *ar) { + if (ar->registered) { #ifdef CONFIG_AR9170_LEDS - ar9170_unregister_leds(ar); + ar9170_unregister_leds(ar); #endif /* CONFIG_AR9170_LEDS */ - kfree_skb(ar->rx_failover); ieee80211_unregister_hw(ar->hw); + } + + kfree_skb(ar->rx_failover); mutex_destroy(&ar->mutex); } diff --git a/drivers/net/wireless/ath/ar9170/usb.c b/drivers/net/wireless/ath/ar9170/usb.c index 0f361186b78f..4e30197afff6 100644 --- a/drivers/net/wireless/ath/ar9170/usb.c +++ b/drivers/net/wireless/ath/ar9170/usb.c @@ -582,43 +582,6 @@ static int ar9170_usb_upload(struct ar9170_usb *aru, const void *data, return 0; } -static int ar9170_usb_request_firmware(struct ar9170_usb *aru) -{ - int err = 0; - - err = request_firmware(&aru->firmware, "ar9170.fw", - &aru->udev->dev); - if (!err) { - aru->init_values = NULL; - return 0; - } - - if (aru->req_one_stage_fw) { - dev_err(&aru->udev->dev, "ar9170.fw firmware file " - "not found and is required for this device\n"); - return -EINVAL; - } - - dev_err(&aru->udev->dev, "ar9170.fw firmware file " - "not found, trying old firmware...\n"); - - err = request_firmware(&aru->init_values, "ar9170-1.fw", - &aru->udev->dev); - if (err) { - dev_err(&aru->udev->dev, "file with init values not found.\n"); - return err; - } - - err = request_firmware(&aru->firmware, "ar9170-2.fw", &aru->udev->dev); - if (err) { - release_firmware(aru->init_values); - dev_err(&aru->udev->dev, "firmware file not found.\n"); - return err; - } - - return err; -} - static int ar9170_usb_reset(struct ar9170_usb *aru) { int ret, lock = (aru->intf->condition != USB_INTERFACE_BINDING); @@ -757,6 +720,103 @@ err_out: return err; } +static void ar9170_usb_firmware_failed(struct ar9170_usb *aru) +{ + struct device *parent = aru->udev->dev.parent; + + /* unbind anything failed */ + if (parent) + down(&parent->sem); + device_release_driver(&aru->udev->dev); + if (parent) + up(&parent->sem); +} + +static void ar9170_usb_firmware_finish(const struct firmware *fw, void *context) +{ + struct ar9170_usb *aru = context; + int err; + + aru->firmware = fw; + + if (!fw) { + dev_err(&aru->udev->dev, "firmware file not found.\n"); + goto err_freefw; + } + + err = ar9170_usb_init_device(aru); + if (err) + goto err_freefw; + + err = ar9170_usb_open(&aru->common); + if (err) + goto err_unrx; + + err = ar9170_register(&aru->common, &aru->udev->dev); + + ar9170_usb_stop(&aru->common); + if (err) + goto err_unrx; + + return; + + err_unrx: + ar9170_usb_cancel_urbs(aru); + + err_freefw: + ar9170_usb_firmware_failed(aru); +} + +static void ar9170_usb_firmware_inits(const struct firmware *fw, + void *context) +{ + struct ar9170_usb *aru = context; + int err; + + if (!fw) { + dev_err(&aru->udev->dev, "file with init values not found.\n"); + ar9170_usb_firmware_failed(aru); + return; + } + + aru->init_values = fw; + + /* ok so we have the init values -- get code for two-stage */ + + err = request_firmware_nowait(THIS_MODULE, 1, "ar9170-2.fw", + &aru->udev->dev, GFP_KERNEL, aru, + ar9170_usb_firmware_finish); + if (err) + ar9170_usb_firmware_failed(aru); +} + +static void ar9170_usb_firmware_step2(const struct firmware *fw, void *context) +{ + struct ar9170_usb *aru = context; + int err; + + if (fw) { + ar9170_usb_firmware_finish(fw, context); + return; + } + + if (aru->req_one_stage_fw) { + dev_err(&aru->udev->dev, "ar9170.fw firmware file " + "not found and is required for this device\n"); + ar9170_usb_firmware_failed(aru); + return; + } + + dev_err(&aru->udev->dev, "ar9170.fw firmware file " + "not found, trying old firmware...\n"); + + err = request_firmware_nowait(THIS_MODULE, 1, "ar9170-1.fw", + &aru->udev->dev, GFP_KERNEL, aru, + ar9170_usb_firmware_inits); + if (err) + ar9170_usb_firmware_failed(aru); +} + static bool ar9170_requires_one_stage(const struct usb_device_id *id) { if (!id->driver_info) @@ -814,33 +874,9 @@ static int ar9170_usb_probe(struct usb_interface *intf, if (err) goto err_freehw; - err = ar9170_usb_request_firmware(aru); - if (err) - goto err_freehw; - - err = ar9170_usb_init_device(aru); - if (err) - goto err_freefw; - - err = ar9170_usb_open(ar); - if (err) - goto err_unrx; - - err = ar9170_register(ar, &udev->dev); - - ar9170_usb_stop(ar); - if (err) - goto err_unrx; - - return 0; - -err_unrx: - ar9170_usb_cancel_urbs(aru); - -err_freefw: - release_firmware(aru->init_values); - release_firmware(aru->firmware); - + return request_firmware_nowait(THIS_MODULE, 1, "ar9170.fw", + &aru->udev->dev, GFP_KERNEL, aru, + ar9170_usb_firmware_step2); err_freehw: usb_set_intfdata(intf, NULL); usb_put_dev(udev); @@ -860,12 +896,12 @@ static void ar9170_usb_disconnect(struct usb_interface *intf) ar9170_unregister(&aru->common); ar9170_usb_cancel_urbs(aru); - release_firmware(aru->init_values); - release_firmware(aru->firmware); - usb_put_dev(aru->udev); usb_set_intfdata(intf, NULL); ieee80211_free_hw(aru->common.hw); + + release_firmware(aru->init_values); + release_firmware(aru->firmware); } #ifdef CONFIG_PM -- cgit v1.2.3 From 4fa004373133ece3d9b1c0a7e243b0e53760b165 Mon Sep 17 00:00:00 2001 From: Sujith Date: Mon, 1 Mar 2010 14:42:57 +0530 Subject: mac80211: Fix HT rate control configuration Handling HT configuration changes involved setting the channel with the new HT parameters and then issuing a rate_update() notification to the driver. This behavior changed after the off-channel changes. Now, the channel is not updated with the new HT params in enable_ht() - instead, it is now done when the scan work terminates. This results in the driver depending on stale information, defaulting to non-HT mode always. Fix this by passing the new channel type to the driver. Cc: stable@kernel.org Signed-off-by: Sujith Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/rc.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/net/wireless/ath') diff --git a/drivers/net/wireless/ath/ath9k/rc.c b/drivers/net/wireless/ath/ath9k/rc.c index ac34a055c713..0e79e58cf4c9 100644 --- a/drivers/net/wireless/ath/ath9k/rc.c +++ b/drivers/net/wireless/ath/ath9k/rc.c @@ -1323,7 +1323,7 @@ static void ath_rate_init(void *priv, struct ieee80211_supported_band *sband, static void ath_rate_update(void *priv, struct ieee80211_supported_band *sband, struct ieee80211_sta *sta, void *priv_sta, - u32 changed) + u32 changed, enum nl80211_channel_type oper_chan_type) { struct ath_softc *sc = priv; struct ath_rate_priv *ath_rc_priv = priv_sta; @@ -1340,8 +1340,8 @@ static void ath_rate_update(void *priv, struct ieee80211_supported_band *sband, if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION) return; - if (sc->hw->conf.channel_type == NL80211_CHAN_HT40MINUS || - sc->hw->conf.channel_type == NL80211_CHAN_HT40PLUS) + if (oper_chan_type == NL80211_CHAN_HT40MINUS || + oper_chan_type == NL80211_CHAN_HT40PLUS) oper_cw40 = true; oper_sgi40 = (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40) ? -- cgit v1.2.3 From 8bd8beab49fec3f7d014c328641bd94de3df744b Mon Sep 17 00:00:00 2001 From: Bruno Randolf Date: Tue, 9 Mar 2010 16:55:23 +0900 Subject: ath5k: use fixed antenna for tx descriptors when using a fixed antenna we should use the antenna number in all tx descriptors, otherwise the hardware will sometimes send the frame out on the other antenna. it seems like the hardware does not always respect the default antenna and diversity settings (esp. AR5K_STA_ID1_DEFAULT_ANTENNA). also i would like to note that antenna diversity does not always work correctly on 5414 (at least) when only one antenna is connected: for example all frames might be received on antenna A but still the HW tries to send on antenna B some times, causing packet loss. this is both verified with the antenna statistics output of the previous patch and a spectrum analyzer. Signed-off-by: Bruno Randolf Acked-by: Nick Kossifidis Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath5k/phy.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/net/wireless/ath') diff --git a/drivers/net/wireless/ath/ath5k/phy.c b/drivers/net/wireless/ath/ath5k/phy.c index 72474c0ccaff..ffe253ab9be7 100644 --- a/drivers/net/wireless/ath/ath5k/phy.c +++ b/drivers/net/wireless/ath/ath5k/phy.c @@ -1873,7 +1873,7 @@ ath5k_hw_set_antenna_mode(struct ath5k_hw *ah, u8 ant_mode) break; case AR5K_ANTMODE_FIXED_A: def_ant = 1; - tx_ant = 0; + tx_ant = 1; use_def_for_tx = true; update_def_on_tx = false; use_def_for_rts = true; @@ -1882,7 +1882,7 @@ ath5k_hw_set_antenna_mode(struct ath5k_hw *ah, u8 ant_mode) break; case AR5K_ANTMODE_FIXED_B: def_ant = 2; - tx_ant = 0; + tx_ant = 2; use_def_for_tx = true; update_def_on_tx = false; use_def_for_rts = true; -- cgit v1.2.3 From a3b980fd1391e75068ae25f3817728b27bfdb04c Mon Sep 17 00:00:00 2001 From: Bruno Randolf Date: Tue, 9 Mar 2010 16:55:33 +0900 Subject: ath5k: fix TSF reset to reset the TSF, AR5K_BEACON_RESET_TSF has to be 1, not 0. also we have a function for that so use it. Signed-off-by: Bruno Randolf Acked-by: Nick Kossifidis Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath5k/reset.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'drivers/net/wireless/ath') diff --git a/drivers/net/wireless/ath/ath5k/reset.c b/drivers/net/wireless/ath/ath5k/reset.c index a35a7db0fc4c..c780b55020d2 100644 --- a/drivers/net/wireless/ath/ath5k/reset.c +++ b/drivers/net/wireless/ath/ath5k/reset.c @@ -1379,11 +1379,10 @@ int ath5k_hw_reset(struct ath5k_hw *ah, enum nl80211_iftype op_mode, ath5k_hw_set_sleep_clock(ah, true); /* - * Disable beacons and reset the register + * Disable beacons and reset the TSF */ - AR5K_REG_DISABLE_BITS(ah, AR5K_BEACON, AR5K_BEACON_ENABLE | - AR5K_BEACON_RESET_TSF); - + AR5K_REG_DISABLE_BITS(ah, AR5K_BEACON, AR5K_BEACON_ENABLE); + ath5k_hw_reset_tsf(ah); return 0; } -- cgit v1.2.3 From 86415d43efd4f7093979cfa8a80232114266f1a4 Mon Sep 17 00:00:00 2001 From: Bruno Randolf Date: Tue, 9 Mar 2010 16:56:05 +0900 Subject: ath5k: fix I/Q calibration (for real) I/Q calibration was completely broken, resulting in a high number of CRC errors on received packets. before i could see around 10% to 20% CRC errors, with this patch they are between 0% and 3%. 1.) the removal of the mask in commit "ath5k: Fix I/Q calibration (f1cf2dbd0f798b71b1590e7aca6647f2caef1649)" resulted in no mask beeing used when writing the I/Q values into the register. additional errors in the calculation of the values (see 2.) resulted too high numbers, exceeding the masks, so wrong values like 0xfffffffe were written. to be safe we should always use the bitmask when writing parts of a register. 2.) using a (s32) cast for q_coff is a wrong conversion to signed, since we convert to a signed value later by substracting 128. this resulted in too low numbers for Q many times, which were limited to -16 by the boundary check later on. 3.) checked everything against the HAL sources and took over comments and minor optimizations from there. 4.) we can't use ENABLE_BITS when we want to write a number (the number can contain zeros). also always write the correction values first and set ENABLE bit last, like the HAL does. Signed-off-by: Bruno Randolf Cc: stable@kernel.org Acked-by: Nick Kossifidis Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath5k/phy.c | 37 ++++++++++++++++++------------------ drivers/net/wireless/ath/ath5k/reg.h | 1 + 2 files changed, 20 insertions(+), 18 deletions(-) (limited to 'drivers/net/wireless/ath') diff --git a/drivers/net/wireless/ath/ath5k/phy.c b/drivers/net/wireless/ath/ath5k/phy.c index ffe253ab9be7..eff3323efb4b 100644 --- a/drivers/net/wireless/ath/ath5k/phy.c +++ b/drivers/net/wireless/ath/ath5k/phy.c @@ -1386,38 +1386,39 @@ static int ath5k_hw_rf511x_calibrate(struct ath5k_hw *ah, goto done; /* Calibration has finished, get the results and re-run */ + + /* work around empty results which can apparently happen on 5212 */ for (i = 0; i <= 10; i++) { iq_corr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_CORR); i_pwr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_PWR_I); q_pwr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_PWR_Q); + ATH5K_DBG_UNLIMIT(ah->ah_sc, ATH5K_DEBUG_CALIBRATE, + "iq_corr:%x i_pwr:%x q_pwr:%x", iq_corr, i_pwr, q_pwr); + if (i_pwr && q_pwr) + break; } i_coffd = ((i_pwr >> 1) + (q_pwr >> 1)) >> 7; q_coffd = q_pwr >> 7; - /* No correction */ - if (i_coffd == 0 || q_coffd == 0) + /* protect against divide by 0 and loss of sign bits */ + if (i_coffd == 0 || q_coffd < 2) goto done; - i_coff = ((-iq_corr) / i_coffd); + i_coff = (-iq_corr) / i_coffd; + i_coff = clamp(i_coff, -32, 31); /* signed 6 bit */ - /* Boundary check */ - if (i_coff > 31) - i_coff = 31; - if (i_coff < -32) - i_coff = -32; + q_coff = (i_pwr / q_coffd) - 128; + q_coff = clamp(q_coff, -16, 15); /* signed 5 bit */ - q_coff = (((s32)i_pwr / q_coffd) - 128); + ATH5K_DBG_UNLIMIT(ah->ah_sc, ATH5K_DEBUG_CALIBRATE, + "new I:%d Q:%d (i_coffd:%x q_coffd:%x)", + i_coff, q_coff, i_coffd, q_coffd); - /* Boundary check */ - if (q_coff > 15) - q_coff = 15; - if (q_coff < -16) - q_coff = -16; - - /* Commit new I/Q value */ - AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_ENABLE | - ((u32)q_coff) | ((u32)i_coff << AR5K_PHY_IQ_CORR_Q_I_COFF_S)); + /* Commit new I/Q values (set enable bit last to match HAL sources) */ + AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_Q_I_COFF, i_coff); + AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_Q_Q_COFF, q_coff); + AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_ENABLE); /* Re-enable calibration -if we don't we'll commit * the same values again and again */ diff --git a/drivers/net/wireless/ath/ath5k/reg.h b/drivers/net/wireless/ath/ath5k/reg.h index 4cb9c5df9f46..1464f89b249c 100644 --- a/drivers/net/wireless/ath/ath5k/reg.h +++ b/drivers/net/wireless/ath/ath5k/reg.h @@ -2187,6 +2187,7 @@ */ #define AR5K_PHY_IQ 0x9920 /* Register Address */ #define AR5K_PHY_IQ_CORR_Q_Q_COFF 0x0000001f /* Mask for q correction info */ +#define AR5K_PHY_IQ_CORR_Q_Q_COFF_S 0 #define AR5K_PHY_IQ_CORR_Q_I_COFF 0x000007e0 /* Mask for i correction info */ #define AR5K_PHY_IQ_CORR_Q_I_COFF_S 5 #define AR5K_PHY_IQ_CORR_ENABLE 0x00000800 /* Enable i/q correction */ -- cgit v1.2.3 From 5f13bfac0718ce6f83ecba3755f224c3790e8d66 Mon Sep 17 00:00:00 2001 From: Bruno Randolf Date: Tue, 9 Mar 2010 16:56:10 +0900 Subject: ath5k: read eeprom IQ calibration values correctly for G mode we read the IQ correction values (i_cal and q_cal) for G mode from a wrong location (the same shifts as for A mode is applied which is incorrect). use correct locations, matching the docs and HAL sources. also we should write IQ correction only when we have that information in the EEPROM, starting from version 4. also write it in the same way as we do in the periodic recalibration (enable last), just to be sure. Signed-off-by: Bruno Randolf Acked-by: Nick Kossifidis Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath5k/eeprom.c | 4 ++-- drivers/net/wireless/ath/ath5k/reset.c | 15 +++++++++------ 2 files changed, 11 insertions(+), 8 deletions(-) (limited to 'drivers/net/wireless/ath') diff --git a/drivers/net/wireless/ath/ath5k/eeprom.c b/drivers/net/wireless/ath/ath5k/eeprom.c index 6a3f4da7fb48..10b52262b232 100644 --- a/drivers/net/wireless/ath/ath5k/eeprom.c +++ b/drivers/net/wireless/ath/ath5k/eeprom.c @@ -429,8 +429,8 @@ static int ath5k_eeprom_read_modes(struct ath5k_hw *ah, u32 *offset, ee->ee_margin_tx_rx[mode] = (val >> 8) & 0x3f; AR5K_EEPROM_READ(o++, val); - ee->ee_i_cal[mode] = (val >> 8) & 0x3f; - ee->ee_q_cal[mode] = (val >> 3) & 0x1f; + ee->ee_i_cal[mode] = (val >> 5) & 0x3f; + ee->ee_q_cal[mode] = val & 0x1f; if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_2) { AR5K_EEPROM_READ(o++, val); diff --git a/drivers/net/wireless/ath/ath5k/reset.c b/drivers/net/wireless/ath/ath5k/reset.c index c780b55020d2..cbf28e379843 100644 --- a/drivers/net/wireless/ath/ath5k/reset.c +++ b/drivers/net/wireless/ath/ath5k/reset.c @@ -851,12 +851,15 @@ static void ath5k_hw_commit_eeprom_settings(struct ath5k_hw *ah, AR5K_PHY_OFDM_SELFCORR_CYPWR_THR1, AR5K_INIT_CYCRSSI_THR1); - /* I/Q correction - * TODO: Per channel i/q infos ? */ - AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, - AR5K_PHY_IQ_CORR_ENABLE | - (ee->ee_i_cal[ee_mode] << AR5K_PHY_IQ_CORR_Q_I_COFF_S) | - ee->ee_q_cal[ee_mode]); + /* I/Q correction (set enable bit last to match HAL sources) */ + /* TODO: Per channel i/q infos ? */ + if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_0) { + AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_Q_I_COFF, + ee->ee_i_cal[ee_mode]); + AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_Q_Q_COFF, + ee->ee_q_cal[ee_mode]); + AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_ENABLE); + } /* Heavy clipping -disable for now */ if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_5_1) -- cgit v1.2.3