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Date: Sun, 03 Aug 2008 00:33:54 -0400
From: Yoshinori Sato <ysato@...rs.sourceforge.jp>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: lkml <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/3] h8300 update timer handler - new files
New timer handler files.
Signed-off-by: Yoshinori Sato <ysato@...rs.sourceforge.jp>
diff --git a/arch/h8300/kernel/timer/Makefile b/arch/h8300/kernel/timer/Makefile
new file mode 100644
index 0000000..bef0510
--- /dev/null
+++ b/arch/h8300/kernel/timer/Makefile
@@ -0,0 +1,6 @@
+# h8300 internal timer handler
+
+obj-$(CONFIG_H8300_TIMER8) := timer8.o
+obj-$(CONFIG_H8300_TIMER16) := timer16.o
+obj-$(CONFIG_H8300_ITU) := itu.o
+obj-$(CONFIG_H8300_TPU) := tpu.o
diff --git a/arch/h8300/kernel/timer/itu.c b/arch/h8300/kernel/timer/itu.c
new file mode 100644
index 0000000..d1c9265
--- /dev/null
+++ b/arch/h8300/kernel/timer/itu.c
@@ -0,0 +1,83 @@
+/*
+ * linux/arch/h8300/kernel/timer/itu.c
+ *
+ * Yoshinori Sato <ysato@...rs.sourcefoge.jp>
+ *
+ * ITU 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/timex.h>
+
+#include <asm/segment.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/regs306x.h>
+
+#if CONFIG_H8300_ITU_CH == 0
+#define ITUBASE 0xffff64
+#define ITUIRQ 24
+#elif CONFIG_H8300_ITU_CH == 1
+#define ITUBASE 0xffff6e
+#define ITUIRQ 28
+#elif CONFIG_H8300_ITU_CH == 2
+#define ITUBASE 0xffff78
+#define ITUIRQ 32
+#elif CONFIG_H8300_ITU_CH == 3
+#define ITUBASE 0xffff82
+#define ITUIRQ 36
+#elif CONFIG_H8300_ITU_CH == 4
+#define ITUBASE 0xffff92
+#define ITUIRQ 40
+#else
+#error Unknown timer channel.
+#endif
+
+#define TCR 0
+#define TIOR 1
+#define TIER 2
+#define TSR 3
+#define TCNT 4
+#define GRA 6
+#define GRB 8
+
+static irqreturn_t timer_interrupt(int irq, void *dev_id)
+{
+ h8300_timer_tick();
+ ctrl_bclr(IMFA, ITUBASE + TSR);
+ return IRQ_HANDLED;
+}
+
+static struct irqaction itu_irq = {
+ .name = "itu",
+ .handler = timer_interrupt,
+ .flags = IRQF_DISABLED | IRQF_TIMER,
+ .mask = CPU_MASK_NONE,
+};
+
+static const int __initdata divide_rate[] = {1, 2, 4, 8};
+
+void __init h8300_timer_setup(void)
+{
+ unsigned int div;
+ unsigned int cnt;
+
+ calc_param(cnt, div, divide_rate, 0x10000);
+
+ setup_irq(ITUIRQ, &itu_irq);
+
+ /* initalize timer */
+ ctrl_outb(0, TSTR);
+ ctrl_outb(CCLR0 | div, ITUBASE + TCR);
+ ctrl_outb(0x01, ITUBASE + TIER);
+ ctrl_outw(cnt, ITUBASE + GRA);
+ ctrl_bset(CONFIG_H8300_ITU_CH, TSTR);
+}
diff --git a/arch/h8300/kernel/timer/timer16.c b/arch/h8300/kernel/timer/timer16.c
new file mode 100644
index 0000000..e14271b
--- /dev/null
+++ b/arch/h8300/kernel/timer/timer16.c
@@ -0,0 +1,78 @@
+/*
+ * linux/arch/h8300/kernel/timer/timer16.c
+ *
+ * Yoshinori Sato <ysato@...rs.sourcefoge.jp>
+ *
+ * 16bit 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/timex.h>
+
+#include <asm/segment.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/regs306x.h>
+
+/* 16bit timer */
+#if CONFIG_H8300_TIMER16_CH == 0
+#define _16BASE 0xffff78
+#define _16IRQ 24
+#elif CONFIG_H8300_TIMER16_CH == 1
+#define _16BASE 0xffff80
+#define _16IRQ 28
+#elif CONFIG_H8300_TIMER16_CH == 2
+#define _16BASE 0xffff88
+#define _16IRQ 32
+#else
+#error Unknown timer channel.
+#endif
+
+#define TCR 0
+#define TIOR 1
+#define TCNT 2
+#define GRA 4
+#define GRB 6
+
+#define H8300_TIMER_FREQ CONFIG_CPU_CLOCK*10000 /* Timer input freq. */
+
+static irqreturn_t timer_interrupt(int irq, void *dev_id)
+{
+ h8300_timer_tick();
+ ctrl_bclr(CONFIG_H8300_TIMER16_CH, TISRA);
+ return IRQ_HANDLED;
+}
+
+static struct irqaction timer16_irq = {
+ .name = "timer-16",
+ .handler = timer_interrupt,
+ .flags = IRQF_DISABLED | IRQF_TIMER,
+ .mask = CPU_MASK_NONE,
+};
+
+static const int __initdata divide_rate[] = {1, 2, 4, 8};
+
+void __init h8300_timer_setup(void)
+{
+ unsigned int div;
+ unsigned int cnt;
+
+ calc_param(cnt, div, divide_rate, 0x10000);
+
+ setup_irq(_16IRQ, &timer16_irq);
+
+ /* initalize timer */
+ ctrl_outb(0, TSTR);
+ ctrl_outb(CCLR0 | div, _16BASE + TCR);
+ ctrl_outw(cnt, _16BASE + GRA);
+ ctrl_bset(4 + CONFIG_H8300_TIMER16_CH, TISRA);
+ ctrl_bset(CONFIG_H8300_TIMER16_CH, TSTR);
+}
diff --git a/arch/h8300/kernel/timer/timer8.c b/arch/h8300/kernel/timer/timer8.c
new file mode 100644
index 0000000..ae500e5
--- /dev/null
+++ b/arch/h8300/kernel/timer/timer8.c
@@ -0,0 +1,103 @@
+/*
+ * linux/arch/h8300/kernel/cpu/timer/timer8.c
+ *
+ * Yoshinori Sato <ysato@...rs.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);
+}
diff --git a/arch/h8300/kernel/timer/tpu.c b/arch/h8300/kernel/timer/tpu.c
new file mode 100644
index 0000000..df7f453
--- /dev/null
+++ b/arch/h8300/kernel/timer/tpu.c
@@ -0,0 +1,102 @@
+/*
+ * linux/arch/h8300/kernel/timer/tpu.c
+ *
+ * Yoshinori Sato <ysato@...rs.sourceforge.jp>
+ *
+ * TPU Timer Handler
+ *
+ */
+
+#include <linux/config.h>
+#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/timex.h>
+
+#include <asm/segment.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/regs267x.h>
+
+/* TPU */
+#if CONFIG_H8300_TPU_CH == 0
+#define TPUBASE 0xffffd0
+#define TPUIRQ 40
+#elif CONFIG_H8300_TPU_CH == 1
+#define TPUBASE 0xffffe0
+#define TPUIRQ 48
+#elif CONFIG_H8300_TPU_CH == 2
+#define TPUBASE 0xfffff0
+#define TPUIRQ 52
+#elif CONFIG_H8300_TPU_CH == 3
+#define TPUBASE 0xfffe80
+#define TPUIRQ 56
+#elif CONFIG_H8300_TPU_CH == 4
+#define TPUBASE 0xfffe90
+#define TPUIRQ 64
+#else
+#error Unknown timer channel.
+#endif
+
+#define _TCR 0
+#define _TMDR 1
+#define _TIOR 2
+#define _TIER 4
+#define _TSR 5
+#define _TCNT 6
+#define _GRA 8
+#define _GRB 10
+
+#define CCLR0 0x20
+
+static irqreturn_t timer_interrupt(int irq, void *dev_id)
+{
+ h8300_timer_tick();
+ ctrl_bclr(0, TPUBASE + _TSR);
+ return IRQ_HANDLED;
+}
+
+static struct irqaction tpu_irq = {
+ .name = "tpu",
+ .handler = timer_interrupt,
+ .flags = IRQF_DISABLED | IRQF_TIMER,
+ .mask = CPU_MASK_NONE,
+};
+
+const static int __initdata divide_rate[] = {
+#if CONFIG_H8300_TPU_CH == 0
+ 1,4,16,64,0,0,0,0,
+#elif (CONFIG_H8300_TPU_CH == 1) || (CONFIG_H8300_TPU_CH == 5)
+ 1,4,16,64,0,0,256,0,
+#elif (CONFIG_H8300_TPU_CH == 2) || (CONFIG_H8300_TPU_CH == 4)
+ 1,4,16,64,0,0,0,1024,
+#elif CONFIG_H8300_TPU_CH == 3
+ 1,4,16,64,0,1024,256,4096,
+#endif
+};
+
+void __init h8300_timer_setup(void)
+{
+ unsigned int cnt;
+ unsigned int div;
+
+ calc_param(cnt, div, divide_rate, 0x10000);
+
+ setup_irq(TPUIRQ, &tpu_irq);
+
+ /* TPU module enabled */
+ ctrl_bclr(3, MSTPCRH);
+
+ ctrl_outb(0, TSTR);
+ ctrl_outb(CCLR0 | div, TPUBASE + _TCR);
+ ctrl_outb(0, TPUBASE + _TMDR);
+ ctrl_outw(0, TPUBASE + _TIOR);
+ ctrl_outb(0x01, TPUBASE + _TIER);
+ ctrl_outw(cnt, TPUBASE + _GRA);
+ ctrl_bset(CONFIG_H8300_TPU_CH, TSTR);
+}
diff --git a/include/asm-h8300/timer.h b/include/asm-h8300/timer.h
new file mode 100644
index 0000000..b4a8953
--- /dev/null
+++ b/include/asm-h8300/timer.h
@@ -0,0 +1,25 @@
+#ifndef __H8300_TIMER_H
+#define __H8300_TIMER_H
+
+void h8300_timer_tick(void);
+void h8300_timer_setup(void);
+void h8300_gettod(unsigned int *year, unsigned int *mon, unsigned int *day,
+ unsigned int *hour, unsigned int *min, unsigned int *sec);
+
+#define TIMER_FREQ (CONFIG_CPU_CLOCK*10000) /* Timer input freq. */
+
+#define calc_param(cnt, div, rate, limit) \
+do { \
+ cnt = TIMER_FREQ / HZ; \
+ for (div = 0; div < ARRAY_SIZE(divide_rate); div++) { \
+ if (rate[div] == 0) \
+ continue; \
+ if ((cnt / rate[div]) > limit) \
+ break; \
+ } \
+ if (div == ARRAY_SIZE(divide_rate)) \
+ panic("Timer counter overflow"); \
+ cnt /= divide_rate[div]; \
+} while(0)
+
+#endif
--
Yoshinori Sato
<ysato@...rs.sourceforge.jp>
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