185 lines
5.8 KiB
Diff
185 lines
5.8 KiB
Diff
From: Felix Fietkau <nbd@openwrt.org>
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Date: Sat, 18 Oct 2014 13:37:32 +0200
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Subject: [PATCH] ath9k: restart hardware after noise floor calibration
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failure
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When NF calibration fails, the radio often becomes deaf. The usual
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hardware hang checks do not detect this, so it's better to issue a reset
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when that happens.
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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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---
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--- a/drivers/net/wireless/ath/ath9k/ar9002_calib.c
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+++ b/drivers/net/wireless/ath/ath9k/ar9002_calib.c
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@@ -657,14 +657,13 @@ static void ar9002_hw_olc_temp_compensat
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ar9280_hw_olc_temp_compensation(ah);
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}
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-static bool ar9002_hw_calibrate(struct ath_hw *ah,
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- struct ath9k_channel *chan,
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- u8 rxchainmask,
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- bool longcal)
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+static int ar9002_hw_calibrate(struct ath_hw *ah, struct ath9k_channel *chan,
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+ u8 rxchainmask, bool longcal)
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{
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bool iscaldone = true;
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struct ath9k_cal_list *currCal = ah->cal_list_curr;
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bool nfcal, nfcal_pending = false;
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+ int ret;
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nfcal = !!(REG_READ(ah, AR_PHY_AGC_CONTROL) & AR_PHY_AGC_CONTROL_NF);
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if (ah->caldata)
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@@ -698,7 +697,9 @@ static bool ar9002_hw_calibrate(struct a
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* NF is slow time-variant, so it is OK to use a
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* historical value.
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*/
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- ath9k_hw_loadnf(ah, ah->curchan);
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+ ret = ath9k_hw_loadnf(ah, ah->curchan);
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+ if (ret < 0)
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+ return ret;
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}
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if (longcal) {
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--- a/drivers/net/wireless/ath/ath9k/ar9003_calib.c
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+++ b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
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@@ -121,13 +121,12 @@ static bool ar9003_hw_per_calibration(st
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return iscaldone;
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}
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-static bool ar9003_hw_calibrate(struct ath_hw *ah,
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- struct ath9k_channel *chan,
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- u8 rxchainmask,
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- bool longcal)
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+static int ar9003_hw_calibrate(struct ath_hw *ah, struct ath9k_channel *chan,
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+ u8 rxchainmask, bool longcal)
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{
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bool iscaldone = true;
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struct ath9k_cal_list *currCal = ah->cal_list_curr;
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+ int ret;
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/*
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* For given calibration:
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@@ -163,7 +162,9 @@ static bool ar9003_hw_calibrate(struct a
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* NF is slow time-variant, so it is OK to use a historical
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* value.
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*/
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- ath9k_hw_loadnf(ah, ah->curchan);
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+ ret = ath9k_hw_loadnf(ah, ah->curchan);
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+ if (ret < 0)
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+ return ret;
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/* start NF calibration, without updating BB NF register */
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ath9k_hw_start_nfcal(ah, false);
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--- a/drivers/net/wireless/ath/ath9k/calib.c
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+++ b/drivers/net/wireless/ath/ath9k/calib.c
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@@ -234,7 +234,7 @@ void ath9k_hw_start_nfcal(struct ath_hw
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REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF);
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}
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-void ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan)
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+int ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan)
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{
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struct ath9k_nfcal_hist *h = NULL;
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unsigned i, j;
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@@ -301,7 +301,7 @@ void ath9k_hw_loadnf(struct ath_hw *ah,
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ath_dbg(common, ANY,
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"Timeout while waiting for nf to load: AR_PHY_AGC_CONTROL=0x%x\n",
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REG_READ(ah, AR_PHY_AGC_CONTROL));
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- return;
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+ return -ETIMEDOUT;
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}
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/*
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@@ -322,6 +322,8 @@ void ath9k_hw_loadnf(struct ath_hw *ah,
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}
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}
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REGWRITE_BUFFER_FLUSH(ah);
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+
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+ return 0;
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}
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--- a/drivers/net/wireless/ath/ath9k/calib.h
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+++ b/drivers/net/wireless/ath/ath9k/calib.h
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@@ -109,7 +109,7 @@ struct ath9k_pacal_info{
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bool ath9k_hw_reset_calvalid(struct ath_hw *ah);
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void ath9k_hw_start_nfcal(struct ath_hw *ah, bool update);
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-void ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan);
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+int ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan);
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bool ath9k_hw_getnf(struct ath_hw *ah, struct ath9k_channel *chan);
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void ath9k_init_nfcal_hist_buffer(struct ath_hw *ah,
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struct ath9k_channel *chan);
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--- a/drivers/net/wireless/ath/ath9k/debug.c
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+++ b/drivers/net/wireless/ath/ath9k/debug.c
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@@ -863,6 +863,7 @@ static ssize_t read_file_reset(struct fi
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[RESET_TYPE_MAC_HANG] = "MAC Hang",
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[RESET_TYPE_BEACON_STUCK] = "Stuck Beacon",
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[RESET_TYPE_MCI] = "MCI Reset",
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+ [RESET_TYPE_CALIBRATION] = "Calibration error",
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};
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char buf[512];
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unsigned int len = 0;
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--- a/drivers/net/wireless/ath/ath9k/debug.h
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+++ b/drivers/net/wireless/ath/ath9k/debug.h
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@@ -49,6 +49,7 @@ enum ath_reset_type {
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RESET_TYPE_MAC_HANG,
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RESET_TYPE_BEACON_STUCK,
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RESET_TYPE_MCI,
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+ RESET_TYPE_CALIBRATION,
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__RESET_TYPE_MAX
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};
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--- a/drivers/net/wireless/ath/ath9k/hw-ops.h
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+++ b/drivers/net/wireless/ath/ath9k/hw-ops.h
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@@ -41,10 +41,9 @@ static inline void ath9k_hw_set_desc_lin
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ath9k_hw_ops(ah)->set_desc_link(ds, link);
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}
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-static inline bool ath9k_hw_calibrate(struct ath_hw *ah,
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- struct ath9k_channel *chan,
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- u8 rxchainmask,
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- bool longcal)
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+static inline int ath9k_hw_calibrate(struct ath_hw *ah,
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+ struct ath9k_channel *chan,
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+ u8 rxchainmask, bool longcal)
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{
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return ath9k_hw_ops(ah)->calibrate(ah, chan, rxchainmask, longcal);
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}
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--- a/drivers/net/wireless/ath/ath9k/hw.h
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+++ b/drivers/net/wireless/ath/ath9k/hw.h
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@@ -688,10 +688,8 @@ struct ath_hw_ops {
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bool power_off);
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void (*rx_enable)(struct ath_hw *ah);
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void (*set_desc_link)(void *ds, u32 link);
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- bool (*calibrate)(struct ath_hw *ah,
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- struct ath9k_channel *chan,
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- u8 rxchainmask,
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- bool longcal);
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+ int (*calibrate)(struct ath_hw *ah, struct ath9k_channel *chan,
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+ u8 rxchainmask, bool longcal);
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bool (*get_isr)(struct ath_hw *ah, enum ath9k_int *masked,
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u32 *sync_cause_p);
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void (*set_txdesc)(struct ath_hw *ah, void *ds,
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--- a/drivers/net/wireless/ath/ath9k/link.c
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+++ b/drivers/net/wireless/ath/ath9k/link.c
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@@ -371,9 +371,15 @@ void ath_ani_calibrate(unsigned long dat
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/* Perform calibration if necessary */
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if (longcal || shortcal) {
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- common->ani.caldone =
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- ath9k_hw_calibrate(ah, ah->curchan,
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- ah->rxchainmask, longcal);
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+ int ret = ath9k_hw_calibrate(ah, ah->curchan, ah->rxchainmask,
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+ longcal);
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+ if (ret < 0) {
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+ common->ani.caldone = 0;
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+ ath9k_queue_reset(sc, RESET_TYPE_CALIBRATION);
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+ return;
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+ }
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+
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+ common->ani.caldone = ret;
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}
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ath_dbg(common, ANI,
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