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
,
70 const static int __initdata divide_rate
[] = {
71 #if CONFIG_H8300_TPU_CH == 0
73 #elif (CONFIG_H8300_TPU_CH == 1) || (CONFIG_H8300_TPU_CH == 5)
75 #elif (CONFIG_H8300_TPU_CH == 2) || (CONFIG_H8300_TPU_CH == 4)
77 #elif CONFIG_H8300_TPU_CH == 3
78 1,4,16,64,0,1024,256,4096,
82 void __init
h8300_timer_setup(void)
87 calc_param(cnt
, div
, divide_rate
, 0x10000);
89 setup_irq(TPUIRQ
, &tpu_irq
);
91 /* TPU module enabled */
92 ctrl_bclr(3, MSTPCRH
);
95 ctrl_outb(CCLR0
| div
, TPUBASE
+ _TCR
);
96 ctrl_outb(0, TPUBASE
+ _TMDR
);
97 ctrl_outw(0, TPUBASE
+ _TIOR
);
98 ctrl_outb(0x01, TPUBASE
+ _TIER
);
99 ctrl_outw(cnt
, TPUBASE
+ _GRA
);
100 ctrl_bset(CONFIG_H8300_TPU_CH
, TSTR
);