2 * linux/arch/h8300/kernel/cpu/timer/timer8.c
4 * Yoshinori Sato <ysato@users.sourcefoge.jp>
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>
16 #include <linux/interrupt.h>
17 #include <linux/init.h>
18 #include <linux/profile.h>
22 #include <asm/timer.h>
23 #if defined(CONFIG_CPU_H8300H)
24 #include <asm/regs306x.h>
26 #if defined(CONFIG_CPU_H8S)
27 #include <asm/regs267x.h>
33 #if defined(CONFIG_H8300_TIMER8_CH0)
35 #ifdef CONFIG_CPU_H8300H
41 #elif defined(CONFIG_H8300_TIMER8_CH2)
42 #ifdef CONFIG_CPU_H8300H
49 #error Unknown timer channel.
63 * timer_interrupt() needs to keep up the real-time clock,
64 * as well as call the "do_timer()" routine every clocktick
67 static irqreturn_t timer_interrupt(int irq, void *dev_id)
70 ctrl_bclr(CMFA, _8BASE + _8TCSR);
74 static struct irqaction timer8_irq = {
76 .handler = timer_interrupt,
77 .flags = IRQF_DISABLED | IRQF_TIMER,
78 .mask = CPU_MASK_NONE,
81 static const int __initdata divide_rate[] = {8, 64, 8192};
83 void __init h8300_timer_setup(void)
88 calc_param(cnt, div, divide_rate, 0x10000);
91 setup_irq(_8IRQ, &timer8_irq);
93 #if defined(CONFIG_CPU_H8S)
94 /* Timer module enable */
99 ctrl_outw(cnt, _8BASE + TCORA);
100 ctrl_outw(0x0000, _8BASE + _8TCSR);
101 ctrl_outw((CMIEA|CCLR_CMA|CKS2) << 8 | div,