96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
/*
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* linux/arch/h8300/platform/h8300h/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/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 <asm/segment.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <linux/timex.h>
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#if defined(CONFIG_H83007) || defined(CONFIG_H83068)
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#include <asm/regs306x.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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/* setup 8bit timer ch2 */
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ctrl_outb(H8300_TIMER_FREQ / HZ, TCORA2); /* set interval */
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ctrl_outb(0x00, _8TCSR2); /* no output */
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request_irq(40, timer_int, 0, "timer", 0);
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ctrl_outb(CMIEA|CCLR_CMA|CLK_DIV8192, _8TCR2); /* 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 *)_8TCSR2 &= ~(1 << CMFA);
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}
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#endif
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#if defined(CONFIG_H83002) || defined(CONFIG_H83048)
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/* FIXME! */
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#define TSTR 0x00ffff60
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#define TSNC 0x00ffff61
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#define TMDR 0x00ffff62
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#define TFCR 0x00ffff63
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#define TOER 0x00ffff90
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#define TOCR 0x00ffff91
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/* ITU0 */
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#define TCR 0x00ffff64
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#define TIOR 0x00ffff65
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#define TIER 0x00ffff66
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#define TSR 0x00ffff67
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#define TCNT 0x00ffff68
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#define GRA 0x00ffff6a
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#define GRB 0x00ffff6c
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#define CCLR_CMGRA 0x20
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#define CLK_DIV8 0x03
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#define H8300_TIMER_FREQ CONFIG_CPU_CLOCK*1000/8 /* 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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*(unsigned short *)GRA= H8300_TIMER_FREQ / HZ; /* set interval */
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*(unsigned short *)TCNT=0; /* clear counter */
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ctrl_outb(0x80|CCLR_CMGRA|CLK_DIV8, TCR); /* set ITU0 clock */
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ctrl_outb(0x88, TIOR); /* no output */
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request_irq(26, timer_int, 0, "timer", 0);
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ctrl_outb(0xf9, TIER); /* compare match GRA interrupt */
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ctrl_outb(ctrl_inb(TSNC) & ~0x01, TSNC); /* ITU0 async */
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ctrl_outb(ctrl_inb(TMDR) & ~0x01, TMDR); /* ITU0 normal mode */
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ctrl_outb(ctrl_inb(TSTR) | 0x01, TSTR); /* ITU0 Start */
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return 0;
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}
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void platform_timer_eoi(void)
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{
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ctrl_outb(ctrl_inb(TSR) & ~0x01,TSR);
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}
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#endif
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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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