h8300: update timer handler - new files

New timer handler files.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

6 files changed, 397 insertions, 0 deletions

diff --git a/arch/h8300/kernel/timer/Makefile b/arch/h8300/kernel/timer/Makefile
new file mode 100644
index 000000000000..bef0510ea6ad
--- /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 000000000000..d1c926596b08
--- /dev/null
+++ b/arch/h8300/kernel/timer/itu.c
@@ -0,0 +1,83 @@
+/*
+ *  linux/arch/h8300/kernel/timer/itu.c
+ *
+ *  Yoshinori Sato <ysato@users.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 000000000000..e14271b72119
--- /dev/null
+++ b/arch/h8300/kernel/timer/timer16.c
@@ -0,0 +1,78 @@
+/*
+ *  linux/arch/h8300/kernel/timer/timer16.c
+ *
+ *  Yoshinori Sato <ysato@users.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 000000000000..0556d7c7bea6
--- /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);
+}
diff --git a/arch/h8300/kernel/timer/tpu.c b/arch/h8300/kernel/timer/tpu.c
new file mode 100644
index 000000000000..df7f453a9673
--- /dev/null
+++ b/arch/h8300/kernel/timer/tpu.c
@@ -0,0 +1,102 @@
+/*
+ *  linux/arch/h8300/kernel/timer/tpu.c
+ *
+ *  Yoshinori Sato <ysato@users.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 000000000000..def80464d38f
--- /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