X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=cpu%2Farm920t%2Fs3c24x0%2Ftimer.c;h=a27f0e273cec779639b678e15afa73c070b743ea;hb=4713010adf5beda87410d637ebfc58db0db9a9db;hp=f0a09cddff50bfdcc0b8f866cc95ab82474ffcf9;hpb=92afd368bba7d98b2b7bfb51082c3639bb2119b3;p=u-boot

diff --git a/cpu/arm920t/s3c24x0/timer.c b/cpu/arm920t/s3c24x0/timer.c
index f0a09cddff..a27f0e273c 100644
--- a/cpu/arm920t/s3c24x0/timer.c
+++ b/cpu/arm920t/s3c24x0/timer.c
@@ -30,7 +30,11 @@
  */
 
 #include <common.h>
-#if defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB)
+#if defined(CONFIG_S3C2400) || \
+    defined(CONFIG_S3C2410) || \
+    defined(CONFIG_TRAB)
+
+#include <asm/io.h>
 
 #if defined(CONFIG_S3C2400)
 #include <s3c2400.h>
@@ -39,40 +43,45 @@
 #endif
 
 int timer_load_val = 0;
+static ulong timer_clk;
 
 /* macro to read the 16 bit timer */
 static inline ulong READ_TIMER(void)
 {
-	S3C24X0_TIMERS * const timers = S3C24X0_GetBase_TIMERS();
+	struct s3c24x0_timers *timers = s3c24x0_get_base_timers();
 
-	return (timers->TCNTO4 & 0xffff);
+	return readl(&timers->TCNTO4) & 0xffff;
 }
 
 static ulong timestamp;
 static ulong lastdec;
 
-int timer_init (void)
+int timer_init(void)
 {
-	S3C24X0_TIMERS * const timers = S3C24X0_GetBase_TIMERS();
+	struct s3c24x0_timers *timers = s3c24x0_get_base_timers();
+	ulong tmr;
 
 	/* use PWM Timer 4 because it has no output */
 	/* prescaler for Timer 4 is 16 */
-	timers->TCFG0 = 0x0f00;
-	if (timer_load_val == 0)
-	{
+	writel(0x0f00, &timers->TCFG0);
+	if (timer_load_val == 0) {
 		/*
 		 * for 10 ms clock period @ PCLK with 4 bit divider = 1/2
 		 * (default) and prescaler = 16. Should be 10390
 		 * @33.25MHz and 15625 @ 50 MHz
 		 */
-		timer_load_val = get_PCLK()/(2 * 16 * 100);
+		timer_load_val = get_PCLK() / (2 * 16 * 100);
+		timer_clk = get_PCLK() / (2 * 16);
 	}
 	/* load value for 10 ms timeout */
-	lastdec = timers->TCNTB4 = timer_load_val;
+	lastdec = timer_load_val;
+	writel(timer_load_val, &timers->TCNTB4);
 	/* auto load, manual update of Timer 4 */
-	timers->TCON = (timers->TCON & ~0x0700000) | 0x600000;
+	tmr = (readl(&timers->TCON) & ~0x0700000) | 0x0600000;
+	writel(tmr, &timers->TCON);
 	/* auto load, start Timer 4 */
-	timers->TCON = (timers->TCON & ~0x0700000) | 0x500000;
+	tmr = (tmr & ~0x0700000) | 0x0500000;
+	writel(tmr, &timers->TCON);
 	timestamp = 0;
 
 	return (0);
@@ -82,58 +91,49 @@ int timer_init (void)
  * timer without interrupts
  */
 
-void reset_timer (void)
+void reset_timer(void)
 {
-	reset_timer_masked ();
+	reset_timer_masked();
 }
 
-ulong get_timer (ulong base)
+ulong get_timer(ulong base)
 {
-	return get_timer_masked () - base;
+	return get_timer_masked() - base;
 }
 
-void set_timer (ulong t)
+void set_timer(ulong t)
 {
 	timestamp = t;
 }
 
-void udelay (unsigned long usec)
+void udelay(unsigned long usec)
 {
 	ulong tmo;
-	ulong start = get_timer(0);
+	ulong start = get_ticks();
 
 	tmo = usec / 1000;
 	tmo *= (timer_load_val * 100);
 	tmo /= 1000;
 
-	while ((ulong)(get_timer_masked () - start) < tmo)
+	while ((ulong) (get_ticks() - start) < tmo)
 		/*NOP*/;
 }
 
-void reset_timer_masked (void)
+void reset_timer_masked(void)
 {
 	/* reset time */
 	lastdec = READ_TIMER();
 	timestamp = 0;
 }
 
-ulong get_timer_masked (void)
+ulong get_timer_masked(void)
 {
-	ulong now = READ_TIMER();
-
-	if (lastdec >= now) {
-		/* normal mode */
-		timestamp += lastdec - now;
-	} else {
-		/* we have an overflow ... */
-		timestamp += lastdec + timer_load_val - now;
-	}
-	lastdec = now;
+	ulong tmr = get_ticks();
 
-	return timestamp;
+	return tmr / (timer_clk / CONFIG_SYS_HZ);
 }
 
-void udelay_masked (unsigned long usec)
+void udelay_masked(unsigned long usec)
 {
 	ulong tmo;
 	ulong endtime;
@@ -145,13 +145,13 @@ void udelay_masked (unsigned long usec)
 		tmo /= 1000;
 	} else {
 		tmo = usec * (timer_load_val * 100);
-		tmo /= (1000*1000);
+		tmo /= (1000 * 1000);
 	}
 
-	endtime = get_timer_masked () + tmo;
+	endtime = get_ticks() + tmo;
 
 	do {
-		ulong now = get_timer_masked ();
+		ulong now = get_ticks();
 		diff = endtime - now;
 	} while (diff >= 0);
 }
@@ -162,14 +162,25 @@ void udelay_masked (unsigned long usec)
  */
 unsigned long long get_ticks(void)
 {
-	return get_timer(0);
+	ulong now = READ_TIMER();
+
+	if (lastdec >= now) {
+		/* normal mode */
+		timestamp += lastdec - now;
+	} else {
+		/* we have an overflow ... */
+		timestamp += lastdec + timer_load_val - now;
+	}
+	lastdec = now;
+
+	return timestamp;
 }
 
 /*
  * 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 get_tbclk(void)
 {
 	ulong tbclk;
 
@@ -189,39 +200,33 @@ ulong get_tbclk (void)
 /*
  * reset the cpu by setting up the watchdog timer and let him time out
  */
-void reset_cpu (ulong ignored)
+void reset_cpu(ulong ignored)
 {
-	volatile S3C24X0_WATCHDOG * watchdog;
+	struct s3c24x0_watchdog *watchdog;
 
 #ifdef CONFIG_TRAB
-	extern void disable_vfd (void);
+	extern void disable_vfd(void);
 
 	disable_vfd();
 #endif
 
-	watchdog = S3C24X0_GetBase_WATCHDOG();
+	watchdog = s3c24x0_get_base_watchdog();
 
 	/* Disable watchdog */
-	watchdog->WTCON = 0x0000;
+	writel(0x0000, &watchdog->WTCON);
 
 	/* Initialize watchdog timer count register */
-	watchdog->WTCNT = 0x0001;
+	writel(0x0001, &watchdog->WTCNT);
 
 	/* Enable watchdog timer; assert reset at timer timeout */
-	watchdog->WTCON = 0x0021;
+	writel(0x0021, &watchdog->WTCON);
 
-	while(1);	/* loop forever and wait for reset to happen */
+	while (1)
+		/* loop forever and wait for reset to happen */;
 
 	/*NOTREACHED*/
 }
 
-#ifdef CONFIG_USE_IRQ
-void s3c2410_irq(void)
-{
-	S3C24X0_INTERRUPT * irq = S3C24X0_GetBase_INTERRUPT();
-	u_int32_t intpnd = irq->INTPND;
-
-}
-#endif /* USE_IRQ */
-
-#endif /* defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB) */
+#endif /* defined(CONFIG_S3C2400)  ||
+	  defined (CONFIG_S3C2410) ||
+	  defined (CONFIG_TRAB) */