This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / sh / boards / se / 73180 / led.c

diff --git a/arch/sh/boards/se/73180/led.c b/arch/sh/boards/se/73180/led.c
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+++ b/arch/sh/boards/se/73180/led.c
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+/*
+ * arch/sh/boards/se/73180/led.c
+ *
+ * Derived from arch/sh/boards/se/770x/led.c
+ *
+ * Copyright (C) 2000 Stuart Menefy <stuart.menefy@st.com>
+ *
+ * May be copied or modified under the terms of the GNU General Public
+ * License.  See linux/COPYING for more information.
+ *
+ * This file contains Solution Engine specific LED code.
+ */
+
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <asm/mach/se73180.h>
+
+static void
+mach_led(int position, int value)
+{
+       volatile unsigned short *p = (volatile unsigned short *) PA_LED;
+
+       if (value) {
+               *p |= (1 << LED_SHIFT);
+       } else {
+               *p &= ~(1 << LED_SHIFT);
+       }
+}
+
+/* Cycle the LED's in the clasic Knightrider/Sun pattern */
+void
+heartbeat_73180se(void)
+{
+       static unsigned int cnt = 0, period = 0;
+       volatile unsigned short *p = (volatile unsigned short *) PA_LED;
+       static unsigned bit = 0, up = 1;
+
+       cnt += 1;
+       if (cnt < period) {
+               return;
+       }
+
+       cnt = 0;
+
+       /* Go through the points (roughly!):
+        * f(0)=10, f(1)=16, f(2)=20, f(5)=35,f(inf)->110
+        */
+       period = 110 - ((300 << FSHIFT) / ((avenrun[0] / 5) + (3 << FSHIFT)));
+
+       if (up) {
+               if (bit == 7) {
+                       bit--;
+                       up = 0;
+               } else {
+                       bit++;
+               }
+       } else {
+               if (bit == 0) {
+                       bit++;
+                       up = 1;
+               } else {
+                       bit--;
+               }
+       }
+       *p = 1 << (bit + LED_SHIFT);
+
+}