1/* 2 * linux/arch/h8300/platform/h8300h/h8max/timer.c 3 * 4 * Yoshinori Sato <ysato@users.sourcefoge.jp> 5 * 6 * Platform depend Timer Handler 7 * 8 */ 9 10#include <linux/errno.h> 11#include <linux/sched.h> 12#include <linux/kernel.h> 13#include <linux/param.h> 14#include <linux/string.h> 15#include <linux/mm.h> 16#include <linux/interrupt.h> 17#include <linux/init.h> 18#include <linux/timex.h> 19 20#include <asm/segment.h> 21#include <asm/io.h> 22#include <asm/irq.h> 23#include <asm/regs306x.h> 24 25#define CMFA 6 26 27#define CMIEA 0x40 28#define CCLR_CMA 0x08 29#define CLK_DIV8192 0x03 30 31#define H8300_TIMER_FREQ CONFIG_CPU_CLOCK*1000/8192 /* Timer input freq. */ 32 33void __init platform_timer_setup(irqreturn_t (*timer_int)(int, void *, struct pt_regs *)) 34{ 35 /* setup 8bit timer ch2 */ 36 ctrl_outb(H8300_TIMER_FREQ / HZ, TCORA2); /* set interval */ 37 ctrl_outb(0x00, _8TCSR2); /* no output */ 38 request_irq(40, timer_int, 0, "timer", 0); 39 ctrl_outb(CMIEA|CCLR_CMA|CLK_DIV8192, _8TCR2); /* start count */ 40} 41 42void platform_timer_eoi(void) 43{ 44 *(volatile unsigned char *)_8TCSR2 &= ~(1 << CMFA); 45} 46 47void platform_gettod(int *year, int *mon, int *day, int *hour, 48 int *min, int *sec) 49{ 50 *year = *mon = *day = *hour = *min = *sec = 0; 51} 52