2 * linux/arch/h8300/kernel/timer/tpu.c
4 * Yoshinori Sato <ysato@users.sourceforge.jp>
10 #include <linux/config.h>
11 #include <linux/errno.h>
12 #include <linux/sched.h>
13 #include <linux/kernel.h>
14 #include <linux/param.h>
15 #include <linux/string.h>
17 #include <linux/interrupt.h>
18 #include <linux/init.h>
19 #include <linux/timex.h>
21 #include <asm/segment.h>
24 #include <asm/regs267x.h>
27 #if CONFIG_H8300_TPU_CH == 0
28 #define TPUBASE 0xffffd0
30 #elif CONFIG_H8300_TPU_CH == 1
31 #define TPUBASE 0xffffe0
33 #elif CONFIG_H8300_TPU_CH == 2
34 #define TPUBASE 0xfffff0
36 #elif CONFIG_H8300_TPU_CH == 3
37 #define TPUBASE 0xfffe80
39 #elif CONFIG_H8300_TPU_CH == 4
40 #define TPUBASE 0xfffe90
43 #error Unknown timer channel.
57 static irqreturn_t timer_interrupt(int irq, void *dev_id)
60 ctrl_bclr(0, TPUBASE + _TSR);
64 static struct irqaction tpu_irq = {
66 .handler = timer_interrupt,
67 .flags = IRQF_DISABLED | IRQF_TIMER,
68 .mask = CPU_MASK_NONE,
71 const static int __initdata divide_rate[] = {
72 #if CONFIG_H8300_TPU_CH == 0
74 #elif (CONFIG_H8300_TPU_CH == 1) || (CONFIG_H8300_TPU_CH == 5)
76 #elif (CONFIG_H8300_TPU_CH == 2) || (CONFIG_H8300_TPU_CH == 4)
78 #elif CONFIG_H8300_TPU_CH == 3
79 1,4,16,64,0,1024,256,4096,
83 void __init h8300_timer_setup(void)
88 calc_param(cnt, div, divide_rate, 0x10000);
90 setup_irq(TPUIRQ, &tpu_irq);
92 /* TPU module enabled */
93 ctrl_bclr(3, MSTPCRH);
96 ctrl_outb(CCLR0 | div, TPUBASE + _TCR);
97 ctrl_outb(0, TPUBASE + _TMDR);
98 ctrl_outw(0, TPUBASE + _TIOR);
99 ctrl_outb(0x01, TPUBASE + _TIER);
100 ctrl_outw(cnt, TPUBASE + _GRA);
101 ctrl_bset(CONFIG_H8300_TPU_CH, TSTR);