diff options
author | Paul Mundt <lethal@linux-sh.org> | 2008-10-20 11:17:52 +0900 |
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committer | Paul Mundt <lethal@linux-sh.org> | 2008-10-20 11:17:52 +0900 |
commit | 4cb40f795af36b3deb743f6ccf6c3fd542c61c8d (patch) | |
tree | db3d7519932549bf528f5b8e4cb8350356cd544d /arch/h8300/kernel/timer/timer8.c | |
parent | 79ed2a9216dd3cc35c4f2c5dbaddadb195af83ac (diff) | |
parent | 0cfd81031a26717fe14380d18275f8e217571615 (diff) |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
Documentation/kernel-parameters.txt
arch/sh/include/asm/elf.h
Diffstat (limited to 'arch/h8300/kernel/timer/timer8.c')
-rw-r--r-- | arch/h8300/kernel/timer/timer8.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/arch/h8300/kernel/timer/timer8.c b/arch/h8300/kernel/timer/timer8.c new file mode 100644 index 00000000000..0556d7c7bea --- /dev/null +++ b/arch/h8300/kernel/timer/timer8.c @@ -0,0 +1,103 @@ +/* + * linux/arch/h8300/kernel/cpu/timer/timer8.c + * + * Yoshinori Sato <ysato@users.sourcefoge.jp> + * + * 8bit Timer Handler + * + */ + +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/param.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/interrupt.h> +#include <linux/init.h> +#include <linux/profile.h> + +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/timer.h> +#if defined(CONFIG_CPU_H8300H) +#include <asm/regs306x.h> +#endif +#if defined(CONFIG_CPU_H8S) +#include <asm/regs267x.h> +#endif + +/* 8bit timer x2 */ +#define CMFA 6 + +#if defined(CONFIG_H8300_TIMER8_CH0) +#define _8BASE _8TCR0 +#ifdef CONFIG_CPU_H8300H +#define _8IRQ 36 +#endif +#ifdef CONFIG_CPU_H8S +#define _8IRQ 72 +#endif +#elif defined(CONFIG_H8300_TIMER8_CH2) +#ifdef CONFIG_CPU_H8300H +#define _8BASE _8TCR2 +#define _8IRQ 40 +#endif +#endif + +#ifndef _8BASE +#error Unknown timer channel. +#endif + +#define _8TCR 0 +#define _8TCSR 2 +#define TCORA 4 +#define TCORB 6 +#define _8TCNT 8 + +#define CMIEA 0x40 +#define CCLR_CMA 0x08 +#define CKS2 0x04 + +/* + * timer_interrupt() needs to keep up the real-time clock, + * as well as call the "do_timer()" routine every clocktick + */ + +static irqreturn_t timer_interrupt(int irq, void *dev_id) +{ + h8300_timer_tick(); + ctrl_bclr(CMFA, _8BASE + _8TCSR); + return IRQ_HANDLED; +} + +static struct irqaction timer8_irq = { + .name = "timer-8", + .handler = timer_interrupt, + .flags = IRQF_DISABLED | IRQF_TIMER, + .mask = CPU_MASK_NONE, +}; + +static const int __initdata divide_rate[] = {8, 64, 8192}; + +void __init h8300_timer_setup(void) +{ + unsigned int div; + unsigned int cnt; + + calc_param(cnt, div, divide_rate, 0x10000); + div++; + + setup_irq(_8IRQ, &timer8_irq); + +#if defined(CONFIG_CPU_H8S) + /* Timer module enable */ + ctrl_bclr(0, MSTPCRL) +#endif + + /* initalize timer */ + ctrl_outw(cnt, _8BASE + TCORA); + ctrl_outw(0x0000, _8BASE + _8TCSR); + ctrl_outw((CMIEA|CCLR_CMA|CKS2) << 8 | div, + _8BASE + _8TCR); +} |