ARM: versatile: convert to common timer code

Convert versatile to use the commmon timer code.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>

arch/arm/cpu/arm926ejs/versatile/timer.c

@@ -21,16 +21,6 @@
 
 #include <common.h>
 
-#define TIMER_LOAD_VAL 0xffffffff
-
-/* macro to read the 32 bit timer */
-#define READ_TIMER (*(volatile ulong *)(CONFIG_SYS_TIMERBASE+4))
-
-DECLARE_GLOBAL_DATA_PTR;
-
-#define timestamp gd->arch.tbl
-#define lastdec gd->arch.lastinc
-
 #define TIMER_ENABLE	(1 << 7)
 #define TIMER_MODE_MSK	(1 << 6)
 #define TIMER_MODE_FR	(0 << 6)
@@ -69,112 +59,6 @@ int timer_init (void)
 
 	*(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8) = tmr_ctrl_val;
 
-	/* init the timestamp and lastdec value */
-	reset_timer_masked();
-
 	return 0;
 }
 
-/*
- * timer without interrupts
- */
-ulong get_timer (ulong base)
-{
-	return get_timer_masked () - base;
-}
-
-/* delay x useconds AND preserve advance timestamp value */
-void __udelay (unsigned long usec)
-{
-	ulong tmo, tmp;
-
-	if(usec >= 1000){		/* if "big" number, spread normalization to seconds */
-		tmo = usec / 1000;	/* start to normalize for usec to ticks per sec */
-		tmo *= CONFIG_SYS_HZ;	/* find number of "ticks" to wait to achieve target */
-		tmo /= 1000;		/* finish normalize. */
-	}else{				/* else small number, don't kill it prior to HZ multiply */
-		tmo = usec * CONFIG_SYS_HZ;
-		tmo /= (1000*1000);
-	}
-
-	tmp = get_timer (0);		/* get current timestamp */
-	if( (tmo + tmp + 1) < tmp )	/* if setting this fordward will roll time stamp */
-		reset_timer_masked ();	/* reset "advancing" timestamp to 0, set lastdec value */
-	else
-		tmo += tmp;		/* else, set advancing stamp wake up time */
-
-	while (get_timer_masked () < tmo)/* loop till event */
-		/*NOP*/;
-}
-
-void reset_timer_masked (void)
-{
-	/* reset time */
-	lastdec = READ_TIMER;  /* capure current decrementer value time */
-	timestamp = 0;	       /* start "advancing" time stamp from 0 */
-}
-
-ulong get_timer_masked (void)
-{
-	ulong now = READ_TIMER;		/* current tick value */
-
-	if (lastdec >= now) {		/* normal mode (non roll) */
-		/* normal mode */
-		timestamp += lastdec - now; /* move stamp fordward with absoulte diff ticks */
-	} else {			/* we have overflow of the count down timer */
-		/* nts = ts + ld + (TLV - now)
-		 * ts=old stamp, ld=time that passed before passing through -1
-		 * (TLV-now) amount of time after passing though -1
-		 * nts = new "advancing time stamp"...it could also roll and cause problems.
-		 */
-		timestamp += lastdec + TIMER_LOAD_VAL - now;
-	}
-	lastdec = now;
-
-	return timestamp;
-}
-
-/* waits specified delay value and resets timestamp */
-void udelay_masked (unsigned long usec)
-{
-	ulong tmo;
-	ulong endtime;
-	signed long diff;
-
-	if (usec >= 1000) {		/* if "big" number, spread normalization to seconds */
-		tmo = usec / 1000;	/* start to normalize for usec to ticks per sec */
-		tmo *= CONFIG_SYS_HZ;		/* find number of "ticks" to wait to achieve target */
-		tmo /= 1000;		/* finish normalize. */
-	} else {			/* else small number, don't kill it prior to HZ multiply */
-		tmo = usec * CONFIG_SYS_HZ;
-		tmo /= (1000*1000);
-	}
-
-	endtime = get_timer_masked () + tmo;
-
-	do {
-		ulong now = get_timer_masked ();
-		diff = endtime - now;
-	} while (diff >= 0);
-}
-
-/*
- * This function is derived from PowerPC code (read timebase as long long).
- * On ARM it just returns the timer value.
- */
-unsigned long long get_ticks(void)
-{
-	return get_timer(0);
-}
-
-/*
- * This function is derived from PowerPC code (timebase clock frequency).
- * On ARM it returns the number of timer ticks per second.
- */
-ulong get_tbclk (void)
-{
-	ulong tbclk;
-
-	tbclk = CONFIG_SYS_HZ;
-	return tbclk;
-}

include/configs/versatile.h

@@ -25,12 +25,11 @@
 
 #define CONFIG_SYS_MEMTEST_START	0x100000
 #define CONFIG_SYS_MEMTEST_END		0x10000000
-#define CONFIG_SYS_HZ			(1000000 / 256)
-#define CONFIG_SYS_TIMERBASE		0x101E2000	/* Timer 0 and 1 base */
 
-#define CONFIG_SYS_TIMER_INTERVAL	10000
-#define CONFIG_SYS_TIMER_RELOAD		(CONFIG_SYS_TIMER_INTERVAL >> 4)
-#define CONFIG_SYS_TIMER_CTRL		0x84		/* Enable, Clock / 16 */
+#define CONFIG_SYS_TIMERBASE		0x101E2000	/* Timer 0 and 1 base */
+#define CONFIG_SYS_TIMER_RATE		(1000000 / 256)
+#define CONFIG_SYS_TIMER_COUNTER	(CONFIG_SYS_TIMERBASE + 0x4)
+#define CONFIG_SYS_TIMER_COUNTS_DOWN
 
 /*
  * control registers