forked from Minki/linux
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
73 lines
1.8 KiB
C
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)
|
|
{
|
|
do_timer(regs);
|
|
#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
|