1 files changed, 102 insertions, 0 deletions
diff --git a/arch/sh/boards/superh/microdev/led.c b/arch/sh/boards/superh/microdev/led.c
new file mode 100644
index 000000000000..52a98e69d3f0
--- /dev/null
+++ b/arch/sh/boards/superh/microdev/led.c
@@ -0,0 +1,102 @@
+/*
+ * linux/arch/sh/kernel/led_microdev.c
+ *
+ * Copyright (C) 2002 Stuart Menefy <stuart.menefy@st.com>
+ * Copyright (C) 2003 Richard Curnow (Richard.Curnow@superh.com)
+ *
+ * May be copied or modified under the terms of the GNU General Public
+ * License.  See linux/COPYING for more information.
+ *
+ */
+
+#include <linux/config.h>
+#include <asm/io.h>
+
+#define LED_REGISTER 0xa6104d20
+
+static void mach_led_d9(int value)
+{
+	unsigned long reg;
+	reg = ctrl_inl(LED_REGISTER);
+	reg &= ~1;
+	reg |= (value & 1);
+	ctrl_outl(reg, LED_REGISTER);
+	return;
+}
+
+static void mach_led_d10(int value)
+{
+	unsigned long reg;
+	reg = ctrl_inl(LED_REGISTER);
+	reg &= ~2;
+	reg |= ((value & 1) << 1);
+	ctrl_outl(reg, LED_REGISTER);
+	return;
+}
+
+
+#ifdef CONFIG_HEARTBEAT
+#include <linux/sched.h>
+
+static unsigned char banner_table[] = {
+	0x11, 0x01, 0x11, 0x01, 0x11, 0x03,
+	0x11, 0x01, 0x11, 0x01, 0x13, 0x03,
+	0x11, 0x01, 0x13, 0x01, 0x13, 0x01, 0x11, 0x03,
+	0x11, 0x03,
+	0x11, 0x01, 0x13, 0x01, 0x11, 0x03,
+	0x11, 0x01, 0x11, 0x01, 0x11, 0x01, 0x11, 0x07,
+	0x13, 0x01, 0x13, 0x03,
+	0x11, 0x01, 0x11, 0x03,
+	0x13, 0x01, 0x11, 0x01, 0x13, 0x01, 0x11, 0x03,
+	0x11, 0x01, 0x13, 0x01, 0x11, 0x03,
+	0x13, 0x01, 0x13, 0x01, 0x13, 0x03,
+	0x13, 0x01, 0x11, 0x01, 0x11, 0x03,
+	0x11, 0x03,
+	0x11, 0x01, 0x11, 0x01, 0x11, 0x01, 0x13, 0x07,
+	0xff
+};
+
+static void banner(void)
+{
+	static int pos = 0;
+	static int count = 0;
+
+	if (count) {
+		count--;
+	} else {
+		int val = banner_table[pos];
+		if (val == 0xff) {
+			pos = 0;
+			val = banner_table[pos];
+		}
+		pos++;
+		mach_led_d10((val >> 4) & 1);
+		count = 10 * (val & 0xf);
+	}
+}
+
+/* From heartbeat_harp in the stboards directory */
+/* acts like an actual heart beat -- ie thump-thump-pause... */
+void microdev_heartbeat(void)
+{
+	static unsigned cnt = 0, period = 0, dist = 0;
+
+	if (cnt == 0 || cnt == dist)
+		mach_led_d9(1);
+	else if (cnt == 7 || cnt == dist+7)
+		mach_led_d9(0);
+
+	if (++cnt > period) {
+		cnt = 0;
+		/* The hyperbolic function below modifies the heartbeat period
+		 * length in dependency of the current (5min) load. It goes
+		 * through the points f(0)=126, f(1)=86, f(5)=51,
+		 * f(inf)->30. */
+		period = ((672<<FSHIFT)/(5*avenrun[0]+(7<<FSHIFT))) + 30;
+		dist = period / 4;
+	}
+
+	banner();
+}
+
+#endif