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);
+}