ath9k: fix a few issues with pa predistortion on ar9003

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@24504 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 375 insertions, 0 deletions

diff --git a/package/mac80211/patches/530-ath9k_paprd_thermal.patch b/package/mac80211/patches/530-ath9k_paprd_thermal.patch
new file mode 100644
index 0000000000..09c7a6645f
--- /dev/null
+++ b/package/mac80211/patches/530-ath9k_paprd_thermal.patch
@@ -0,0 +1,122 @@
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -320,6 +320,42 @@ static void ath_paprd_activate(struct at
+ 	ath9k_ps_restore(sc);
+ }
+ 
++static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int chain)
++{
++	struct ieee80211_hw *hw = sc->hw;
++	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
++	struct ath_tx_control txctl;
++	int time_left;
++
++	memset(&txctl, 0, sizeof(txctl));
++	txctl.txq = sc->tx.txq_map[WME_AC_BE];
++
++	memset(tx_info, 0, sizeof(*tx_info));
++	tx_info->band = hw->conf.channel->band;
++	tx_info->flags |= IEEE80211_TX_CTL_NO_ACK;
++	tx_info->control.rates[0].idx = 0;
++	tx_info->control.rates[0].count = 1;
++	tx_info->control.rates[0].flags = IEEE80211_TX_RC_MCS;
++	tx_info->control.rates[1].idx = -1;
++
++	init_completion(&sc->paprd_complete);
++	sc->paprd_pending = true;
++	txctl.paprd = BIT(chain);
++	if (ath_tx_start(hw, skb, &txctl) != 0)
++		return false;
++
++	time_left = wait_for_completion_timeout(&sc->paprd_complete,
++			msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
++	sc->paprd_pending = false;
++
++	if (!time_left)
++		ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CALIBRATE,
++			"Timeout waiting for paprd training on TX chain %d\n",
++			chain);
++
++	return !!time_left;
++}
++
+ void ath_paprd_calibrate(struct work_struct *work)
+ {
+ 	struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
+@@ -327,18 +363,12 @@ void ath_paprd_calibrate(struct work_str
+ 	struct ath_hw *ah = sc->sc_ah;
+ 	struct ieee80211_hdr *hdr;
+ 	struct sk_buff *skb = NULL;
+-	struct ieee80211_tx_info *tx_info;
+-	int band = hw->conf.channel->band;
+-	struct ieee80211_supported_band *sband = &sc->sbands[band];
+-	struct ath_tx_control txctl;
+ 	struct ath9k_hw_cal_data *caldata = ah->caldata;
+ 	struct ath_common *common = ath9k_hw_common(ah);
+ 	int ftype;
+ 	int chain_ok = 0;
+ 	int chain;
+ 	int len = 1800;
+-	int time_left;
+-	int i;
+ 
+ 	if (!caldata)
+ 		return;
+@@ -347,8 +377,6 @@ void ath_paprd_calibrate(struct work_str
+ 	if (!skb)
+ 		return;
+ 
+-	tx_info = IEEE80211_SKB_CB(skb);
+-
+ 	skb_put(skb, len);
+ 	memset(skb->data, 0, len);
+ 	hdr = (struct ieee80211_hdr *)skb->data;
+@@ -359,9 +387,6 @@ void ath_paprd_calibrate(struct work_str
+ 	memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
+ 	memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
+ 
+-	memset(&txctl, 0, sizeof(txctl));
+-	txctl.txq = sc->tx.txq_map[WME_AC_BE];
+-
+ 	ath9k_ps_wakeup(sc);
+ 	ar9003_paprd_init_table(ah);
+ 	for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
+@@ -369,30 +394,19 @@ void ath_paprd_calibrate(struct work_str
+ 			continue;
+ 
+ 		chain_ok = 0;
+-		memset(tx_info, 0, sizeof(*tx_info));
+-		tx_info->band = band;
+ 
+-		for (i = 0; i < 4; i++) {
+-			tx_info->control.rates[i].idx = sband->n_bitrates - 1;
+-			tx_info->control.rates[i].count = 6;
+-		}
++		ath_dbg(common, ATH_DBG_CALIBRATE,
++			"Sending PAPRD frame for thermal measurement "
++			"on chain %d\n", chain);
++		if (!ath_paprd_send_frame(sc, skb, chain))
++			goto fail_paprd;
+ 
+-		init_completion(&sc->paprd_complete);
+-		sc->paprd_pending = true;
+ 		ar9003_paprd_setup_gain_table(ah, chain);
+-		txctl.paprd = BIT(chain);
+-		if (ath_tx_start(hw, skb, &txctl) != 0)
+-			break;
+ 
+-		time_left = wait_for_completion_timeout(&sc->paprd_complete,
+-				msecs_to_jiffies(ATH_PAPRD_TIMEOUT));
+-		sc->paprd_pending = false;
+-		if (!time_left) {
+-			ath_dbg(ath9k_hw_common(ah), ATH_DBG_CALIBRATE,
+-				"Timeout waiting for paprd training on TX chain %d\n",
+-				chain);
++		ath_dbg(common, ATH_DBG_CALIBRATE,
++			"Sending PAPRD training frame on chain %d\n", chain);
++		if (!ath_paprd_send_frame(sc, skb, chain))
+ 			goto fail_paprd;
+-		}
+ 
+ 		if (!ar9003_paprd_is_done(ah))
+ 			break;
diff --git a/package/mac80211/patches/531-ath9k_paprd_rate_mask.patch b/package/mac80211/patches/531-ath9k_paprd_rate_mask.patch
new file mode 100644
index 0000000000..153fb90a1e
--- /dev/null
+++ b/package/mac80211/patches/531-ath9k_paprd_rate_mask.patch
@@ -0,0 +1,28 @@
+--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h
++++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h
+@@ -31,6 +31,12 @@
+ #define AR9300_ANT_16S               25
+ #define AR9300_FUTURE_MODAL_SZ       6
+ 
++#define AR9300_PAPRD_RATE_MASK		0x01ffffff
++#define AR9300_PAPRD_SCALE_1		0x0e000000
++#define AR9300_PAPRD_SCALE_1_S		25
++#define AR9300_PAPRD_SCALE_2		0x70000000
++#define AR9300_PAPRD_SCALE_2_S		28
++
+ /* Delta from which to start power to pdadc table */
+ /* This offset is used in both open loop and closed loop power control
+  * schemes. In open loop power control, it is not really needed, but for
+--- a/drivers/net/wireless/ath/ath9k/ar9003_paprd.c
++++ b/drivers/net/wireless/ath/ath9k/ar9003_paprd.c
+@@ -52,8 +52,8 @@ static void ar9003_paprd_setup_single_ta
+ 	else
+ 		hdr = &eep->modalHeader2G;
+ 
+-	am_mask = le32_to_cpu(hdr->papdRateMaskHt20);
+-	ht40_mask = le32_to_cpu(hdr->papdRateMaskHt40);
++	am_mask = le32_to_cpu(hdr->papdRateMaskHt20) & AR9300_PAPRD_RATE_MASK;
++	ht40_mask = le32_to_cpu(hdr->papdRateMaskHt40) & AR9300_PAPRD_RATE_MASK;
+ 
+ 	REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2AM, AR_PHY_PAPRD_AM2AM_MASK, am_mask);
+ 	REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2PM, AR_PHY_PAPRD_AM2PM_MASK, am_mask);
diff --git a/package/mac80211/patches/532-ath9k_paprd_training_power.patch b/package/mac80211/patches/532-ath9k_paprd_training_power.patch
new file mode 100644
index 0000000000..e659fadfff
--- /dev/null
+++ b/package/mac80211/patches/532-ath9k_paprd_training_power.patch
@@ -0,0 +1,225 @@
+--- a/drivers/net/wireless/ath/ath9k/ar9003_paprd.c
++++ b/drivers/net/wireless/ath/ath9k/ar9003_paprd.c
+@@ -30,9 +30,66 @@ void ar9003_paprd_enable(struct ath_hw *
+ }
+ EXPORT_SYMBOL(ar9003_paprd_enable);
+ 
+-static void ar9003_paprd_setup_single_table(struct ath_hw *ah)
++static int ar9003_get_training_power_2g(struct ath_hw *ah)
+ {
+ 	struct ar9300_eeprom *eep = &ah->eeprom.ar9300_eep;
++	struct ar9300_modal_eep_header *hdr = &eep->modalHeader2G;
++	unsigned int power, scale, delta;
++
++	scale = MS(hdr->papdRateMaskHt20, AR9300_PAPRD_SCALE_1);
++	power = REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE5,
++			       AR_PHY_POWERTX_RATE5_POWERTXHT20_0);
++
++	delta = abs((int) ah->paprd_target_power - (int) power);
++	if (delta > scale)
++		return -1;
++
++	if (delta < 4)
++		power -= 4 - delta;
++
++	return power;
++}
++
++static int get_streams(int mask)
++{
++	return !!(mask & BIT(0)) + !!(mask & BIT(1)) + !!(mask & BIT(2));
++}
++
++static int ar9003_get_training_power_5g(struct ath_hw *ah)
++{
++	struct ath_common *common = ath9k_hw_common(ah);
++	struct ar9300_eeprom *eep = &ah->eeprom.ar9300_eep;
++	struct ar9300_modal_eep_header *hdr = &eep->modalHeader5G;
++	struct ath9k_channel *chan = ah->curchan;
++	unsigned int power, scale, delta;
++
++	if (chan->channel >= 5700)
++		scale = MS(hdr->papdRateMaskHt20, AR9300_PAPRD_SCALE_1);
++	else if (chan->channel >= 5400)
++		scale = MS(hdr->papdRateMaskHt40, AR9300_PAPRD_SCALE_2);
++	else
++		scale = MS(hdr->papdRateMaskHt40, AR9300_PAPRD_SCALE_1);
++
++	if (IS_CHAN_HT40(chan))
++		power = REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE8,
++			AR_PHY_POWERTX_RATE8_POWERTXHT40_5);
++	else
++		power = REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE6,
++			AR_PHY_POWERTX_RATE6_POWERTXHT20_5);
++
++	power += scale;
++	delta = abs((int) ah->paprd_target_power - (int) power);
++	if (delta > scale)
++		return -1;
++
++	power += 2 * get_streams(common->tx_chainmask);
++	return power;
++}
++
++static int ar9003_paprd_setup_single_table(struct ath_hw *ah)
++{
++	struct ath_common *common = ath9k_hw_common(ah);
++	struct ar9300_eeprom *eep = &ah->eeprom.ar9300_eep;
+ 	struct ar9300_modal_eep_header *hdr;
+ 	static const u32 ctrl0[3] = {
+ 		AR_PHY_PAPRD_CTRL0_B0,
+@@ -45,6 +102,7 @@ static void ar9003_paprd_setup_single_ta
+ 		AR_PHY_PAPRD_CTRL1_B2
+ 	};
+ 	u32 am_mask, ht40_mask;
++	int training_power;
+ 	int i;
+ 
+ 	if (ah->curchan && IS_CHAN_5GHZ(ah->curchan))
+@@ -55,11 +113,25 @@ static void ar9003_paprd_setup_single_ta
+ 	am_mask = le32_to_cpu(hdr->papdRateMaskHt20) & AR9300_PAPRD_RATE_MASK;
+ 	ht40_mask = le32_to_cpu(hdr->papdRateMaskHt40) & AR9300_PAPRD_RATE_MASK;
+ 
++	if (IS_CHAN_2GHZ(ah->curchan))
++		training_power = ar9003_get_training_power_2g(ah);
++	else
++		training_power = ar9003_get_training_power_5g(ah);
++
++	if (training_power < 0) {
++		ath_dbg(common, ATH_DBG_CALIBRATE,
++			"PAPRD target power delta out of range");
++		return -ERANGE;
++	}
++	ah->paprd_training_power = training_power;
++	ath_dbg(common, ATH_DBG_CALIBRATE,
++		"Training power: %d, Target power: %d\n",
++		ah->paprd_training_power, ah->paprd_target_power);
++
+ 	REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2AM, AR_PHY_PAPRD_AM2AM_MASK, am_mask);
+ 	REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2PM, AR_PHY_PAPRD_AM2PM_MASK, am_mask);
+ 	REG_RMW_FIELD(ah, AR_PHY_PAPRD_HT40, AR_PHY_PAPRD_HT40_MASK, ht40_mask);
+ 
+-
+ 	for (i = 0; i < ah->caps.max_txchains; i++) {
+ 		REG_RMW_FIELD(ah, ctrl0[i],
+ 			      AR_PHY_PAPRD_CTRL0_USE_SINGLE_TABLE_MASK, 1);
+@@ -141,6 +213,7 @@ static void ar9003_paprd_setup_single_ta
+ 		      AR_PHY_PAPRD_PRE_POST_SCALING, 185706);
+ 	REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_7_B0,
+ 		      AR_PHY_PAPRD_PRE_POST_SCALING, 175487);
++	return 0;
+ }
+ 
+ static void ar9003_paprd_get_gain_table(struct ath_hw *ah)
+@@ -595,15 +668,10 @@ void ar9003_paprd_populate_single_table(
+ {
+ 	u32 *paprd_table_val = caldata->pa_table[chain];
+ 	u32 small_signal_gain = caldata->small_signal_gain[chain];
+-	u32 training_power;
++	u32 training_power = ah->paprd_training_power;
+ 	u32 reg = 0;
+ 	int i;
+ 
+-	training_power =
+-	    REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE5,
+-			   AR_PHY_POWERTX_RATE5_POWERTXHT20_0);
+-	training_power -= 4;
+-
+ 	if (chain == 0)
+ 		reg = AR_PHY_PAPRD_MEM_TAB_B0;
+ 	else if (chain == 1)
+@@ -643,14 +711,8 @@ EXPORT_SYMBOL(ar9003_paprd_populate_sing
+ 
+ int ar9003_paprd_setup_gain_table(struct ath_hw *ah, int chain)
+ {
+-
+ 	unsigned int i, desired_gain, gain_index;
+-	unsigned int train_power;
+-
+-	train_power = REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE5,
+-				     AR_PHY_POWERTX_RATE5_POWERTXHT20_0);
+-
+-	train_power = train_power - 4;
++	unsigned int train_power = ah->paprd_training_power;
+ 
+ 	desired_gain = ar9003_get_desired_gain(ah, chain, train_power);
+ 
+@@ -716,7 +778,12 @@ EXPORT_SYMBOL(ar9003_paprd_create_curve)
+ 
+ int ar9003_paprd_init_table(struct ath_hw *ah)
+ {
+-	ar9003_paprd_setup_single_table(ah);
++	int ret;
++
++	ret = ar9003_paprd_setup_single_table(ah);
++	if (ret < 0)
++	    return ret;
++
+ 	ar9003_paprd_get_gain_table(ah);
+ 	return 0;
+ }
+--- a/drivers/net/wireless/ath/ath9k/hw.h
++++ b/drivers/net/wireless/ath/ath9k/hw.h
+@@ -835,6 +835,8 @@ struct ath_hw {
+ 	u32 bb_watchdog_last_status;
+ 	u32 bb_watchdog_timeout_ms; /* in ms, 0 to disable */
+ 
++	unsigned int paprd_target_power;
++	unsigned int paprd_training_power;
+ 	u32 paprd_gain_table_entries[PAPRD_GAIN_TABLE_ENTRIES];
+ 	u8 paprd_gain_table_index[PAPRD_GAIN_TABLE_ENTRIES];
+ 	/*
+--- a/drivers/net/wireless/ath/ath9k/ar9003_phy.h
++++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.h
+@@ -1090,6 +1090,14 @@
+ #define AR_PHY_POWERTX_RATE5_POWERTXHT20_0	0x3F
+ #define AR_PHY_POWERTX_RATE5_POWERTXHT20_0_S	0
+ 
++#define AR_PHY_POWERTX_RATE6			(AR_SM_BASE + 0x1d4)
++#define AR_PHY_POWERTX_RATE6_POWERTXHT20_5	0x3F00
++#define AR_PHY_POWERTX_RATE6_POWERTXHT20_5_S	8
++
++#define AR_PHY_POWERTX_RATE8			(AR_SM_BASE + 0x1dc)
++#define AR_PHY_POWERTX_RATE8_POWERTXHT40_5	0x3F00
++#define AR_PHY_POWERTX_RATE8_POWERTXHT40_5_S	8
++
+ void ar9003_hw_set_chain_masks(struct ath_hw *ah, u8 rx, u8 tx);
+ 
+ #endif  /* AR9003_PHY_H */
+--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
++++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
+@@ -4798,6 +4798,14 @@ static void ath9k_hw_ar9300_set_txpower(
+ 	/* Write target power array to registers */
+ 	ar9003_hw_tx_power_regwrite(ah, targetPowerValT2);
+ 	ar9003_hw_calibration_apply(ah, chan->channel);
++
++	if (IS_CHAN_2GHZ(chan))
++		i = ALL_TARGET_HT20_0_8_16;
++	else if (IS_CHAN_HT40(chan))
++		i = ALL_TARGET_HT40_7;
++	else
++		i = ALL_TARGET_HT20_7;
++	ah->paprd_target_power = targetPowerValT2[i];
+ }
+ 
+ static u16 ath9k_hw_ar9300_get_spur_channel(struct ath_hw *ah,
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -373,6 +373,9 @@ void ath_paprd_calibrate(struct work_str
+ 	if (!caldata)
+ 		return;
+ 
++	if (ar9003_paprd_init_table(ah) < 0)
++		return;
++
+ 	skb = alloc_skb(len, GFP_KERNEL);
+ 	if (!skb)
+ 		return;
+@@ -388,7 +391,6 @@ void ath_paprd_calibrate(struct work_str
+ 	memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
+ 
+ 	ath9k_ps_wakeup(sc);
+-	ar9003_paprd_init_table(ah);
+ 	for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
+ 		if (!(common->tx_chainmask & BIT(chain)))
+ 			continue;