linux/include/asm-arm/arch-l7200/time.h
Linus Torvalds 0cd61b68c3 Initial blind fixup for arm for irq changes
Untested, but this should fix up the bulk of the totally mechanical
issues, and should make the actual detail fixing easier.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-06 10:59:54 -07:00

73 lines
1.8 KiB
C

/*
* linux/include/asm-arm/arch-l7200/time.h
*
* Copyright (C) 2000 Rob Scott (rscott@mtrob.fdns.net)
* Steve Hill (sjhill@cotw.com)
*
* Changelog:
* 01-02-2000 RS Created l7200 version, derived from rpc code
* 05-03-2000 SJH Complete rewrite
*/
#ifndef _ASM_ARCH_TIME_H
#define _ASM_ARCH_TIME_H
#include <asm/arch/irqs.h>
/*
* RTC base register address
*/
#define RTC_BASE (IO_BASE_2 + 0x2000)
/*
* RTC registers
*/
#define RTC_RTCDR (*(volatile unsigned char *) (RTC_BASE + 0x000))
#define RTC_RTCMR (*(volatile unsigned char *) (RTC_BASE + 0x004))
#define RTC_RTCS (*(volatile unsigned char *) (RTC_BASE + 0x008))
#define RTC_RTCC (*(volatile unsigned char *) (RTC_BASE + 0x008))
#define RTC_RTCDV (*(volatile unsigned char *) (RTC_BASE + 0x00c))
#define RTC_RTCCR (*(volatile unsigned char *) (RTC_BASE + 0x010))
/*
* RTCCR register values
*/
#define RTC_RATE_32 0x00 /* 32 Hz tick */
#define RTC_RATE_64 0x10 /* 64 Hz tick */
#define RTC_RATE_128 0x20 /* 128 Hz tick */
#define RTC_RATE_256 0x30 /* 256 Hz tick */
#define RTC_EN_ALARM 0x01 /* Enable alarm */
#define RTC_EN_TIC 0x04 /* Enable counter */
#define RTC_EN_STWDOG 0x08 /* Enable watchdog */
/*
* Handler for RTC timer interrupt
*/
static irqreturn_t
timer_interrupt(int irq, void *dev_id)
{
struct pt_regs *regs = get_irq_regs();
do_timer(1);
#ifndef CONFIG_SMP
update_process_times(user_mode(regs));
#endif
do_profile(regs);
RTC_RTCC = 0; /* Clear interrupt */
return IRQ_HANDLED;
}
/*
* Set up RTC timer interrupt, and return the current time in seconds.
*/
void __init time_init(void)
{
RTC_RTCC = 0; /* Clear interrupt */
timer_irq.handler = timer_interrupt;
setup_irq(IRQ_RTC_TICK, &timer_irq);
RTC_RTCCR = RTC_RATE_128 | RTC_EN_TIC; /* Set rate and enable timer */
}
#endif