/* *  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 "xtime_update()" 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,}; 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 	/* initialize timer */	ctrl_outw(cnt, _8BASE + TCORA);	ctrl_outw(0x0000, _8BASE + _8TCSR);	ctrl_outw((CMIEA|CCLR_CMA|CKS2) << 8 | div,		  _8BASE + _8TCR);}