patch-2.4.22 linux-2.4.22/arch/sh64/kernel/led.c

• Lines: 70
• Date: 2003-08-25 04:44:40.000000000 -0700
• Orig file: linux-2.4.21/arch/sh64/kernel/led.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/arch/sh64/kernel/led.c linux-2.4.22/arch/sh64/kernel/led.c
@@ -0,0 +1,69 @@
+/*
+ * arch/sh64/kernel/led.c
+ *
+ * Copyright (C) 2002 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.
+ *
+ * Flash the LEDs
+ */
+#include <linux/config.h>
+#include <linux/stddef.h>
+#include <linux/sched.h>
+
+void mach_alphanum(int pos, unsigned char val);
+void mach_led(int pos, int val);
+
+void print_seg(char *file, int line)
+{
+	int i;
+	unsigned int nibble;
+
+	for (i = 0; i < 5; i++) {
+		mach_alphanum(i, file[i]);
+	}
+
+	for (i = 0; i < 3; i++) {
+		nibble = ((line >> (i * 4)) & 0xf);
+		mach_alphanum(7 - i, nibble + ((nibble > 9) ? 55 : 48));
+	}
+}
+
+void print_seg_num(unsigned num)
+{
+	int i;
+	unsigned int nibble;
+
+	for (i = 0; i < 8; i++) {
+		nibble = ((num >> (i * 4)) & 0xf);
+
+		mach_alphanum(7 - i, nibble + ((nibble > 9) ? 55 : 48));
+	}
+}
+
+/* acts like an actual heart beat -- ie thump-thump-pause... */
+void heartbeat(void)
+{
+	static unsigned int cnt = 0, period = 0, dist = 0;
+
+	if (cnt == 0 || cnt == dist) {
+		mach_led(-1, 1);
+	} else if (cnt == 7 || cnt == dist + 7) {
+		mach_led(-1, 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;
+	}
+}
+