arm: timer and interrupt init rework

actually the timer init use the interrupt_init as init callback
which make the interrupt and timer implementation difficult to follow

so now rename it as int timer_init(void) and use interrupt_init for interrupt

btw also remane the corresponding file to the functionnality implemented

as ixp arch implement two timer - one based on interrupt - so all the timer
related code is moved to timer.c

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

board/armltd/integratorap/integratorap.c

@@ -540,7 +540,7 @@ static ulong div_timer	 = 1;	/* Divisor to convert timer reading
  * - the Integrator/AP timer issues an interrupt
  *   each time it reaches zero
  */
-int interrupt_init (void)
+int timer_init (void)
 {
 	/* Load timer with initial value */
 	*(volatile ulong *)(CONFIG_SYS_TIMERBASE + 0) = TIMER_LOAD_VAL;

board/armltd/integratorcp/integratorcp.c

@@ -163,7 +163,7 @@ static ulong timestamp;		/* U-Boot ticks since startup	      */
 
 /* starts up a counter
  * - the Integrator/CP timer can be set up to issue an interrupt */
-int interrupt_init (void)
+int timer_init (void)
 {
 	/* Load timer with initial value */
 	*(volatile ulong *)(CONFIG_SYS_TIMERBASE + 0) = TIMER_LOAD_VAL;

board/atmel/at91cap9adk/at91cap9adk.c

@@ -61,7 +61,6 @@ static void at91cap9_slowclock_hw_init(void)
 	if (at91_sys_read(AT91_PMC_VER) == ARCH_ID_AT91CAP9_REVC) {
 		unsigned i, tmp = at91_sys_read(AT91_SCKCR);
 		if ((tmp & AT91CAP9_SCKCR_OSCSEL) == AT91CAP9_SCKCR_OSCSEL_RC) {
-			extern void timer_init(void);
 			timer_init();
 			tmp |= AT91CAP9_SCKCR_OSC32EN;
 			at91_sys_write(AT91_SCKCR, tmp);

board/davinci/common/misc.h

@@ -22,7 +22,6 @@
 #ifndef __MISC_H
 #define __MISC_H
 
-extern void timer_init(void);
 extern int eth_hw_init(void);
 
 void dv_display_clk_infos(void);

board/m501sk/m501sk.c

@@ -127,7 +127,7 @@ int board_init(void)
 	m501sk_gpio_init();
 
 	/* Do interrupt init here, because flash needs timers */
-	interrupt_init();
+	timer_init();
 	flash_init();
 
 	return 0;

board/netstar/netstar.c

@@ -48,7 +48,7 @@ int dram_init(void)
 	/* Take the Ethernet controller out of reset and wait
 	 * for the EEPROM load to complete. */
 	*((volatile unsigned short *) GPIO_DATA_OUTPUT_REG) |= 0x80;
-	udelay(10);	/* doesn't work before interrupt_init call */
+	udelay(10);	/* doesn't work before timer_init call */
 	*((volatile unsigned short *) GPIO_DATA_OUTPUT_REG) &= ~0x80;
 	udelay(500);
 

board/voiceblue/voiceblue.c

@@ -43,7 +43,7 @@ int dram_init(void)
 	/* Take the Ethernet controller out of reset and wait
 	 * for the EEPROM load to complete. */
 	*((volatile unsigned short *) GPIO_DATA_OUTPUT_REG) |= 0x80;
-	udelay(10);	/* doesn't work before interrupt_init call */
+	udelay(10);	/* doesn't work before timer_init call */
 	*((volatile unsigned short *) GPIO_DATA_OUTPUT_REG) &= ~0x80;
 	udelay(500);
 

cpu/arm1136/mx31/Makefile

@@ -25,7 +25,8 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(SOC).a
 
-COBJS	= interrupts.o generic.o
+COBJS	+= generic.o
+COBJS	+= timer.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))

cpu/arm1136/mx31/interrupts.c → cpu/arm1136/mx31/timer.c

@@ -89,9 +89,8 @@ static inline unsigned long long us_to_tick(unsigned long long us)
 }
 #endif
 
-/* nothing really to do with interrupts, just starts up a counter. */
 /* The 32768Hz 32-bit timer overruns in 131072 seconds */
-int interrupt_init (void)
+int timer_init (void)
 {
 	int i;
 

cpu/arm1136/omap24xx/Makefile

@@ -25,9 +25,10 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(SOC).a
 
-COBJS	= interrupts.o
 SOBJS	= start.o
 
+COBJS	= timer.o
+
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
 

cpu/arm1136/omap24xx/interrupts.c → cpu/arm1136/omap24xx/timer.c

@@ -42,8 +42,7 @@
 static ulong timestamp;
 static ulong lastinc;
 
-/* nothing really to do with interrupts, just starts up a counter. */
-int interrupt_init (void)
+int timer_init (void)
 {
 	int32_t val;
 

cpu/arm1176/s3c64xx/Makefile

@@ -28,8 +28,8 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(SOC).a
 
-COBJS-y	= interrupts.o
 COBJS-$(CONFIG_S3C6400)	+= cpu_init.o speed.o
+COBJS-y	+= timer.o
 
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS-y))
 

cpu/arm1176/s3c64xx/interrupts.c → cpu/arm1176/s3c64xx/timer.c

@@ -66,7 +66,7 @@ static unsigned long lastdec;
 /* Monotonic incrementing timer */
 static unsigned long long timestamp;
 
-int interrupt_init(void)
+int timer_init(void)
 {
 	s3c64xx_timers *const timers = s3c64xx_get_base_timers();
 

cpu/arm720t/interrupts.c

@@ -110,9 +110,34 @@ static void timer_isr( void *data) {
 static ulong timestamp;
 static ulong lastdec;
 
+#if defined(CONFIG_USE_IRQ) && defined(CONFIG_S3C4510B)
 int interrupt_init (void)
 {
+	int i;
+
+	/* install default interrupt handlers */
+	for ( i = 0; i < N_IRQS; i++) {
+		IRQ_HANDLER[i].m_data = (void *)i;
+		IRQ_HANDLER[i].m_func = default_isr;
+	}
+
+	/* configure interrupts for IRQ mode */
+	PUT_REG( REG_INTMODE, 0x0);
+	/* clear any pending interrupts */
+	PUT_REG( REG_INTPEND, 0x1FFFFF);
+
+	lastdec = 0;
+
+	/* install interrupt handler for timer */
+	IRQ_HANDLER[INT_TIMER0].m_data = (void *)&timestamp;
+	IRQ_HANDLER[INT_TIMER0].m_func = timer_isr;
+
+	return 0;
+}
+#endif
 
+int timer_init (void)
+{
 #if defined(CONFIG_NETARM)
 	/* disable all interrupts */
 	IRQEN = 0;
@@ -137,25 +162,6 @@ int interrupt_init (void)
 	/* set timer 1 counter */
 	lastdec = IO_TC1D = TIMER_LOAD_VAL;
 #elif defined(CONFIG_S3C4510B)
-	int i;
-
-	/* install default interrupt handlers */
-	for ( i = 0; i < N_IRQS; i++) {
-		IRQ_HANDLER[i].m_data = (void *)i;
-		IRQ_HANDLER[i].m_func = default_isr;
-	}
-
-	/* configure interrupts for IRQ mode */
-	PUT_REG( REG_INTMODE, 0x0);
-	/* clear any pending interrupts */
-	PUT_REG( REG_INTPEND, 0x1FFFFF);
-
-	lastdec = 0;
-
-	/* install interrupt handler for timer */
-	IRQ_HANDLER[INT_TIMER0].m_data = (void *)&timestamp;
-	IRQ_HANDLER[INT_TIMER0].m_func = timer_isr;
-
 	/* configure free running timer 0 */
 	PUT_REG( REG_TMOD, 0x0);
 	/* Stop timer 0 */
@@ -187,7 +193,7 @@ int interrupt_init (void)
 	PUT32(T0TCR, 1);	/* enable timer0 */
 
 #else
-#error No interrupt_init() defined for this CPU type
+#error No timer_init() defined for this CPU type
 #endif
 	timestamp = 0;
 

cpu/arm920t/at91rm9200/Makefile

@@ -31,10 +31,10 @@ COBJS	+= bcm5221.o
 COBJS	+= dm9161.o
 COBJS	+= ether.o
 COBJS	+= i2c.o
-COBJS	+= interrupts.o
 COBJS	+= lxt972.o
 COBJS	+= reset.o
 COBJS	+= spi.o
+COBJS	+= timer.o
 COBJS	+= usb.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)

cpu/arm920t/at91rm9200/interrupts.c → cpu/arm920t/at91rm9200/timer.c

@@ -45,7 +45,7 @@ AT91PS_TC tmr;
 static ulong timestamp;
 static ulong lastinc;
 
-int interrupt_init (void)
+int timer_init (void)
 {
 	tmr = AT91C_BASE_TC0;
 

cpu/arm920t/imx/Makefile

@@ -25,7 +25,9 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(SOC).a
 
-COBJS	= generic.o interrupts.o speed.o
+COBJS	+= generic.o
+COBJS	+= speed.o
+COBJS	+= timer.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))

cpu/arm920t/imx/interrupts.c → cpu/arm920t/imx/timer.c

@@ -35,7 +35,7 @@
 #include <arm920t.h>
 #include <asm/arch/imx-regs.h>
 
-int interrupt_init (void)
+int timer_init (void)
 {
 	int i;
 	/* setup GP Timer 1 */

cpu/arm920t/ks8695/Makefile

@@ -25,9 +25,10 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(SOC).a
 
-COBJS	= interrupts.o
 SOBJS	= lowlevel_init.o
 
+COBJS	= timer.o
+
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
 

cpu/arm920t/ks8695/interrupts.c → cpu/arm920t/ks8695/timer.c

@@ -29,13 +29,13 @@
 #define	ks8695_read(a)    *((volatile ulong *) (KS8695_IO_BASE + (a)))
 #define	ks8695_write(a,v) *((volatile ulong *) (KS8695_IO_BASE + (a))) = (v)
 
-int timer_inited;
 ulong timer_ticks;
 
-int interrupt_init (void)
+int timer_init (void)
 {
-	/* nothing happens here - we don't setup any IRQs */
-	return (0);
+	reset_timer();
+
+	return 0;
 }
 
 /*
@@ -53,7 +53,6 @@ void reset_timer_masked(void)
 	ks8695_write(KS8695_TIMER1_PCOUNT, TIMER_PULSE);
 	ks8695_write(KS8695_TIMER_CTRL, 0x2);
 	timer_ticks = 0;
-	timer_inited++;
 }
 
 void reset_timer(void)
@@ -87,9 +86,6 @@ void udelay(ulong usec)
 	ulong start = get_timer_masked();
 	ulong end;
 
-	if (!timer_inited)
-		reset_timer();
-
 	/* Only 1ms resolution :-( */
 	end = usec / 1000;
 	while (get_timer(start) < end)