X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fm68knommu%2Fplatform%2F5307%2Ftimers.c;h=e5668af19789ccae8e2843befd28f2749341d3ed;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=ef49596aa09cf04b1e79b8f8c62a1319838ba2c1;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git

diff --git a/arch/m68knommu/platform/5307/timers.c b/arch/m68knommu/platform/5307/timers.c
index ef49596aa..e5668af19 100644
--- a/arch/m68knommu/platform/5307/timers.c
+++ b/arch/m68knommu/platform/5307/timers.c
@@ -3,17 +3,17 @@
 /*
  *	timers.c -- generic ColdFire hardware timer support.
  *
- *	Copyright (C) 1999-2003, Greg Ungerer (gerg@snapgear.com)
+ *	Copyright (C) 1999-2006, Greg Ungerer (gerg@snapgear.com)
  */
 
 /***************************************************************************/
 
-#include <linux/config.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/param.h>
 #include <linux/interrupt.h>
 #include <linux/init.h>
+#include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/traps.h>
 #include <asm/machdep.h>
@@ -23,6 +23,11 @@
 
 /***************************************************************************/
 
+/*
+ *	By default use timer1 as the system clock timer.
+ */
+#define	TA(a)	(MCF_MBAR + MCFTIMER_BASE1 + (a))
+
 /*
  *	Default the timer and vector to use for ColdFire. Some ColdFire
  *	CPU's and some boards may want different. Their sub-architecture
@@ -32,8 +37,6 @@ unsigned int	mcf_timervector = 29;
 unsigned int	mcf_profilevector = 31;
 unsigned int	mcf_timerlevel = 5;
 
-static volatile struct mcftimer *mcf_timerp;
-
 /*
  *	These provide the underlying interrupt vector support.
  *	Unfortunately it is a little different on each ColdFire.
@@ -41,27 +44,32 @@ static volatile struct mcftimer *mcf_timerp;
 extern void mcf_settimericr(int timer, int level);
 extern int mcf_timerirqpending(int timer);
 
+#if defined(CONFIG_M532x)
+#define	__raw_readtrr	__raw_readl
+#define	__raw_writetrr	__raw_writel
+#else
+#define	__raw_readtrr	__raw_readw
+#define	__raw_writetrr	__raw_writew
+#endif
+
 /***************************************************************************/
 
 void coldfire_tick(void)
 {
 	/* Reset the ColdFire timer */
-	mcf_timerp->ter = MCFTIMER_TER_CAP | MCFTIMER_TER_REF;
+	__raw_writeb(MCFTIMER_TER_CAP | MCFTIMER_TER_REF, TA(MCFTIMER_TER));
 }
 
 /***************************************************************************/
 
 void coldfire_timer_init(irqreturn_t (*handler)(int, void *, struct pt_regs *))
 {
-	/* Set up an internal TIMER as poll clock */
-	mcf_timerp = (volatile struct mcftimer *) (MCF_MBAR + MCFTIMER_BASE1);
-	mcf_timerp->tmr = MCFTIMER_TMR_DISABLE;
+	__raw_writew(MCFTIMER_TMR_DISABLE, TA(MCFTIMER_TMR));
+	__raw_writetrr(((MCF_BUSCLK / 16) / HZ), TA(MCFTIMER_TRR));
+	__raw_writew(MCFTIMER_TMR_ENORI | MCFTIMER_TMR_CLK16 |
+		MCFTIMER_TMR_RESTART | MCFTIMER_TMR_ENABLE, TA(MCFTIMER_TMR));
 
-	mcf_timerp->trr = (unsigned short) ((MCF_BUSCLK / 16) / HZ);
-	mcf_timerp->tmr = MCFTIMER_TMR_ENORI | MCFTIMER_TMR_CLK16 |
-		MCFTIMER_TMR_RESTART | MCFTIMER_TMR_ENABLE;
-
-	request_irq(mcf_timervector, handler, SA_INTERRUPT, "timer", NULL);
+	request_irq(mcf_timervector, handler, IRQF_DISABLED, "timer", NULL);
 	mcf_settimericr(1, mcf_timerlevel);
 
 #ifdef CONFIG_HIGHPROFILE
@@ -75,13 +83,8 @@ unsigned long coldfire_timer_offset(void)
 {
 	unsigned long trr, tcn, offset;
 
-	/*
-	 * The change to pointer and de-reference is to force the compiler
-	 * to read the registers with a single 16bit access. Otherwise it
-	 * does some crazy 8bit read combining.
-	 */
-	tcn = *(&mcf_timerp->tcn);
-	trr = *(&mcf_timerp->trr);
+	tcn = __raw_readw(TA(MCFTIMER_TCN));
+	trr = __raw_readtrr(TA(MCFTIMER_TRR));
 	offset = (tcn * (1000000 / HZ)) / trr;
 
 	/* Check if we just wrapped the counters and maybe missed a tick */
@@ -94,22 +97,24 @@ unsigned long coldfire_timer_offset(void)
 #ifdef CONFIG_HIGHPROFILE
 /***************************************************************************/
 
+/*
+ *	By default use timer2 as the profiler clock timer.
+ */
+#define	PA(a)	(MCF_MBAR + MCFTIMER_BASE2 + (a))
+
 /*
  *	Choose a reasonably fast profile timer. Make it an odd value to
  *	try and get good coverage of kernal operations.
  */
 #define	PROFILEHZ	1013
 
-static volatile struct mcftimer *mcf_proftp;
-
 /*
  *	Use the other timer to provide high accuracy profiling info.
  */
-
 void coldfire_profile_tick(int irq, void *dummy, struct pt_regs *regs)
 {
 	/* Reset ColdFire timer2 */
-	mcf_proftp->ter = MCFTIMER_TER_CAP | MCFTIMER_TER_REF;
+	__raw_writeb(MCFTIMER_TER_CAP | MCFTIMER_TER_REF, PA(MCFTIMER_TER));
 	if (current->pid)
 		profile_tick(CPU_PROFILING, regs);
 }
@@ -121,15 +126,14 @@ void coldfire_profile_init(void)
 	printk(KERN_INFO "PROFILE: lodging TIMER2 @ %dHz as profile timer\n", PROFILEHZ);
 
 	/* Set up TIMER 2 as high speed profile clock */
-	mcf_proftp = (volatile struct mcftimer *) (MCF_MBAR + MCFTIMER_BASE2);
-	mcf_proftp->tmr = MCFTIMER_TMR_DISABLE;
+	__raw_writew(MCFTIMER_TMR_DISABLE, PA(MCFTIMER_TMR));
 
-	mcf_proftp->trr = (unsigned short) ((MCF_CLK / 16) / PROFILEHZ);
-	mcf_proftp->tmr = MCFTIMER_TMR_ENORI | MCFTIMER_TMR_CLK16 |
-		MCFTIMER_TMR_RESTART | MCFTIMER_TMR_ENABLE;
+	__raw_writetrr(((MCF_CLK / 16) / PROFILEHZ), PA(MCFTIMER_TRR));
+	__raw_writew(MCFTIMER_TMR_ENORI | MCFTIMER_TMR_CLK16 |
+		MCFTIMER_TMR_RESTART | MCFTIMER_TMR_ENABLE, PA(MCFTIMER_TMR));
 
 	request_irq(mcf_profilevector, coldfire_profile_tick,
-		(SA_INTERRUPT | IRQ_FLG_FAST), "profile timer", NULL);
+		(IRQF_DISABLED | IRQ_FLG_FAST), "profile timer", NULL);
 	mcf_settimericr(2, 7);
 }