/* *  linux/arch/h8300/kernel/timer/timer16.c * *  Yoshinori Sato <ysato@users.sourcefoge.jp> * *  16bit 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/timex.h> #include <asm/segment.h>#include <asm/io.h>#include <asm/irq.h>#include <asm/regs306x.h> /* 16bit timer */#if CONFIG_H8300_TIMER16_CH == 0#define _16BASE	0xffff78#define _16IRQ	24#elif CONFIG_H8300_TIMER16_CH == 1#define _16BASE	0xffff80#define _16IRQ	28#elif CONFIG_H8300_TIMER16_CH == 2#define _16BASE	0xffff88#define _16IRQ	32#else#error Unknown timer channel.#endif #define TCR	0#define TIOR	1#define TCNT	2#define GRA	4#define GRB	6 #define H8300_TIMER_FREQ CONFIG_CPU_CLOCK*10000 /* Timer input freq. */ static irqreturn_t timer_interrupt(int irq, void *dev_id){	h8300_timer_tick();	ctrl_bclr(CONFIG_H8300_TIMER16_CH, TISRA);	return IRQ_HANDLED;} static struct irqaction timer16_irq = {	.name		= "timer-16",	.handler	= timer_interrupt,	.flags		= IRQF_DISABLED | IRQF_TIMER,}; static const int __initdata divide_rate[] = {1, 2, 4, 8}; void __init h8300_timer_setup(void){	unsigned int div;	unsigned int cnt; 	calc_param(cnt, div, divide_rate, 0x10000); 	setup_irq(_16IRQ, &timer16_irq); 	/* initialize timer */	ctrl_outb(0, TSTR);	ctrl_outb(CCLR0 | div, _16BASE + TCR);	ctrl_outw(cnt, _16BASE + GRA);	ctrl_bset(4 + CONFIG_H8300_TIMER16_CH, TISRA);	ctrl_bset(CONFIG_H8300_TIMER16_CH, TSTR);}