55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
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/*
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* linux/arch/h8300/platform/h8s/generic/timer.c
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*
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* Yoshinori Sato <ysato@users.sourceforge.jp>
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*
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* Platform depend Timer Handler
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*
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*/
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#include <linux/config.h>
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/param.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/timex.h>
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#include <asm/segment.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/regs267x.h>
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#define CMFA 6
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#define CMIEA 0x40
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#define CCLR_CMA 0x08
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#define CLK_DIV8192 0x03
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#define H8300_TIMER_FREQ CONFIG_CPU_CLOCK*1000/8192 /* Timer input freq. */
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void __init platform_timer_setup(irqreturn_t (*timer_int)(int, void *, struct pt_regs *))
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{
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/* 8bit timer module enabled */
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ctrl_outb(ctrl_inb(MSTPCRL) & ~0x01, MSTPCRL);
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/* setup 8bit timer ch1 */
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ctrl_outb(H8300_TIMER_FREQ / HZ, _8TCORA1); /* set interval */
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ctrl_outb(0x00, _8TCSR1); /* no output */
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request_irq(76, timer_int, 0, "timer" ,0);
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ctrl_outb(CMIEA|CCLR_CMA|CLK_DIV8192, _8TCR1); /* start count */
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}
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void platform_timer_eoi(void)
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{
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*(volatile unsigned char *)_8TCSR1 &= ~(1 << CMFA);
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}
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void platform_gettod(int *year, int *mon, int *day, int *hour,
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int *min, int *sec)
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{
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*year = *mon = *day = *hour = *min = *sec = 0;
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}
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