Add ath_hal_setbeacontimers() to the AR9300 HAL.

This is a custom FreeBSD HAL method that is used by the TDMA code
to program the beacon timers directly without any guesswork/assumptions
by the HAL.

This brings up basic TDMA master/slave support on the AR9380 HAL,
however there are other issues preventing it from being stable.
(I'm seeing beacon interval instability, which may be due to
busy 2GHz air, but also may be due to some HAL configuration
issues with regards to ANI, or hardware timer programming, etc.)

Tested:

* AR9331 (Carambola2), STA, AP, adhoc and TDMA master mode.

2 files changed, 56 insertions, 2 deletions

diff --git a/sys/contrib/dev/ath/ath_hal/ar9300/ar9300_beacon.c b/sys/contrib/dev/ath/ath_hal/ar9300/ar9300_beacon.c
index a3cca95..f4da88c 100644
--- a/sys/contrib/dev/ath/ath_hal/ar9300/ar9300_beacon.c
+++ b/sys/contrib/dev/ath/ath_hal/ar9300/ar9300_beacon.c
@@ -57,6 +57,9 @@ ar9300_beacon_init(struct ath_hal *ah,
     /* Add the fraction adjustment lost due to unit conversions. */
     beacon_period_usec += beacon_period_fraction;
 
+    HALDEBUG(ah, HAL_DEBUG_BEACON,
+        "%s: next_beacon=0x%08x, beacon_period=%d, opmode=%d, beacon_period_usec=%d\n",
+        __func__, next_beacon, beacon_period, opmode, beacon_period_usec);
 
     OS_REG_WRITE(ah, AR_BEACON_PERIOD, beacon_period_usec);
     OS_REG_WRITE(ah, AR_DMA_BEACON_PERIOD, beacon_period_usec);
diff --git a/sys/contrib/dev/ath/ath_hal/ar9300/ar9300_freebsd.c b/sys/contrib/dev/ath/ath_hal/ar9300/ar9300_freebsd.c
index 7a5919e..7ba7823 100644
--- a/sys/contrib/dev/ath/ath_hal/ar9300/ar9300_freebsd.c
+++ b/sys/contrib/dev/ath/ath_hal/ar9300/ar9300_freebsd.c
@@ -36,6 +36,9 @@
 static HAL_BOOL ar9300ClrMulticastFilterIndex(struct ath_hal *ah, uint32_t ix);
 static HAL_BOOL ar9300SetMulticastFilterIndex(struct ath_hal *ah, uint32_t ix);
 
+static void ar9300_beacon_set_beacon_timers(struct ath_hal *ah,
+    const HAL_BEACON_TIMERS *bt);
+
 static void
 ar9300SetChainMasks(struct ath_hal *ah, uint32_t tx_chainmask,
     uint32_t rx_chainmask)
@@ -193,10 +196,9 @@ ar9300_attach_freebsd_ops(struct ath_hal *ah)
 	/* Beacon functions */
 	/* ah_setBeaconTimers */
 	ah->ah_beaconInit		= ar9300_freebsd_beacon_init;
-	/* ah_setBeaconTimers */
+	ah->ah_setBeaconTimers		= ar9300_beacon_set_beacon_timers;
 	ah->ah_setStationBeaconTimers = ar9300_set_sta_beacon_timers;
 	/* ah_resetStationBeaconTimers */
-	/* ah_getNextTBTT */
 	ah->ah_getNextTBTT = ar9300_get_next_tbtt;
 
 	/* Interrupt functions */
@@ -669,6 +671,55 @@ ar9300SetMulticastFilterIndex(struct ath_hal *ah, uint32_t ix)
 	return (AH_TRUE);
 }
 
+#define	TU_TO_USEC(_tu) ((_tu) << 10)
+#define	ONE_EIGHTH_TU_TO_USEC(_tu8) ((_tu8) << 7)
+
+/*
+ * Initializes all of the hardware registers used to
+ * send beacons.  Note that for station operation the
+ * driver calls ar9300_set_sta_beacon_timers instead.
+ */
+static void
+ar9300_beacon_set_beacon_timers(struct ath_hal *ah,
+    const HAL_BEACON_TIMERS *bt)
+{
+	uint32_t bperiod;
+
+#if 0
+    HALASSERT(opmode == HAL_M_IBSS || opmode == HAL_M_HOSTAP);
+    if (opmode == HAL_M_IBSS) {
+        OS_REG_SET_BIT(ah, AR_TXCFG, AR_TXCFG_ADHOC_BEACON_ATIM_TX_POLICY);
+    }
+#endif
+
+	/* XXX TODO: should migrate the HAL code to always use ONE_EIGHTH_TU */
+	OS_REG_WRITE(ah, AR_NEXT_TBTT_TIMER, TU_TO_USEC(bt->bt_nexttbtt));
+	OS_REG_WRITE(ah, AR_NEXT_DMA_BEACON_ALERT, ONE_EIGHTH_TU_TO_USEC(bt->bt_nextdba));
+	OS_REG_WRITE(ah, AR_NEXT_SWBA, ONE_EIGHTH_TU_TO_USEC(bt->bt_nextswba));
+	OS_REG_WRITE(ah, AR_NEXT_NDP_TIMER, TU_TO_USEC(bt->bt_nextatim));
+
+	bperiod = TU_TO_USEC(bt->bt_intval & HAL_BEACON_PERIOD);
+	/* XXX TODO! */
+//        ahp->ah_beaconInterval = bt->bt_intval & HAL_BEACON_PERIOD;
+	OS_REG_WRITE(ah, AR_BEACON_PERIOD, bperiod);
+	OS_REG_WRITE(ah, AR_DMA_BEACON_PERIOD, bperiod);
+	OS_REG_WRITE(ah, AR_SWBA_PERIOD, bperiod);
+	OS_REG_WRITE(ah, AR_NDP_PERIOD, bperiod);
+
+	/*
+	 * Reset TSF if required.
+	 */
+	if (bt->bt_intval & HAL_BEACON_RESET_TSF)
+		ar9300_reset_tsf(ah);
+
+	/* enable timers */
+	/* NB: flags == 0 handled specially for backwards compatibility */
+	OS_REG_SET_BIT(ah, AR_TIMER_MODE,
+	    bt->bt_flags != 0 ? bt->bt_flags :
+	    AR_TBTT_TIMER_EN | AR_DBA_TIMER_EN | AR_SWBA_TIMER_EN);
+}
+
+
 /*
  * RF attach stubs
  */