e0b0f9e4ea
New timer handler files. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
103 lines
1.9 KiB
C
103 lines
1.9 KiB
C
/*
|
|
* linux/arch/h8300/kernel/cpu/timer/timer8.c
|
|
*
|
|
* Yoshinori Sato <ysato@users.sourcefoge.jp>
|
|
*
|
|
* 8bit Timer Handler
|
|
*
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/param.h>
|
|
#include <linux/string.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/init.h>
|
|
#include <linux/profile.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/timer.h>
|
|
#if defined(CONFIG_CPU_H8300H)
|
|
#include <asm/regs306x.h>
|
|
#endif
|
|
#if defined(CONFIG_CPU_H8S)
|
|
#include <asm/regs267x.h>
|
|
#endif
|
|
|
|
/* 8bit timer x2 */
|
|
#define CMFA 6
|
|
|
|
#if defined(CONFIG_H8300_TIMER8_CH0)
|
|
#define _8BASE _8TCR0
|
|
#ifdef CONFIG_CPU_H8300H
|
|
#define _8IRQ 36
|
|
#endif
|
|
#ifdef CONFIG_CPU_H8S
|
|
#define _8IRQ 72
|
|
#endif
|
|
#elif defined(CONFIG_H8300_TIMER8_CH2)
|
|
#ifdef CONFIG_CPU_H8300H
|
|
#define _8BASE _8TCR2
|
|
#define _8IRQ 40
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef _8BASE
|
|
#error Unknown timer channel.
|
|
#endif
|
|
|
|
#define _8TCR 0
|
|
#define _8TCSR 2
|
|
#define TCORA 4
|
|
#define TCORB 6
|
|
#define _8TCNT 8
|
|
|
|
#define CMIEA 0x40
|
|
#define CCLR_CMA 0x08
|
|
#define CKS2 0x04
|
|
|
|
/*
|
|
* timer_interrupt() needs to keep up the real-time clock,
|
|
* as well as call the "do_timer()" routine every clocktick
|
|
*/
|
|
|
|
static irqreturn_t timer_interrupt(int irq, void *dev_id)
|
|
{
|
|
h8300_timer_tick();
|
|
ctrl_bclr(CMFA, _8BASE + _8TCSR);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static struct irqaction timer8_irq = {
|
|
.name = "timer-8",
|
|
.handler = timer_interrupt,
|
|
.flags = IRQF_DISABLED | IRQF_TIMER,
|
|
.mask = CPU_MASK_NONE,
|
|
};
|
|
|
|
static const int __initdata divide_rate[] = {8, 64, 8192};
|
|
|
|
void __init h8300_timer_setup(void)
|
|
{
|
|
unsigned int div;
|
|
unsigned int cnt;
|
|
|
|
calc_param(cnt, div, divide_rate, 0x10000);
|
|
div++;
|
|
|
|
setup_irq(_8IRQ, &timer8_irq);
|
|
|
|
#if defined(CONFIG_CPU_H8S)
|
|
/* Timer module enable */
|
|
ctrl_bclr(0, MSTPCRL)
|
|
#endif
|
|
|
|
/* initalize timer */
|
|
ctrl_outw(cnt, _8BASE + TCORA);
|
|
ctrl_outw(0x0000, _8BASE + _8TCSR);
|
|
ctrl_outw((CMIEA|CCLR_CMA|CKS2) << 8 | div,
|
|
_8BASE + _8TCR);
|
|
}
|