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 00000000000..52a98e69d3f
--- /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