1 files changed, 98 insertions, 0 deletions

diff --git a/arch/mn10300/unit-asb2364/leds.c b/arch/mn10300/unit-asb2364/leds.c
new file mode 100644
index 000000000000..1ff830c372b3
--- /dev/null
+++ b/arch/mn10300/unit-asb2364/leds.c
@@ -0,0 +1,98 @@
+/* leds.c: ASB2364 peripheral 7seg LEDs x4 support
+ *
+ * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <asm/intctl-regs.h>
+#include <asm/rtc-regs.h>
+#include <unit/leds.h>
+
+#if MN10300_USE_7SEGLEDS
+static const u8 asb2364_led_hex_tbl[16] = {
+        0x80, 0xf2, 0x48, 0x60, 0x32, 0x24, 0x04, 0xf0,
+        0x00, 0x20, 0x10, 0x06, 0x8c, 0x42, 0x0c, 0x1c
+};
+
+static const u32 asb2364_led_chase_tbl[6] = {
+        ~0x02020202,    /* top          - segA */
+        ~0x04040404,    /* right top    - segB */
+        ~0x08080808,    /* right bottom - segC */
+        ~0x10101010,    /* bottom       - segD */
+        ~0x20202020,    /* left bottom  - segE */
+        ~0x40404040,    /* left top     - segF */
+};
+
+static unsigned asb2364_led_chase;
+
+void peripheral_leds7x4_display_dec(unsigned int val, unsigned int points)
+{
+        u32 leds;
+
+        leds = asb2364_led_hex_tbl[(val/1000) % 10];
+        leds <<= 8;
+        leds |= asb2364_led_hex_tbl[(val/100) % 10];
+        leds <<= 8;
+        leds |= asb2364_led_hex_tbl[(val/10) % 10];
+        leds <<= 8;
+        leds |= asb2364_led_hex_tbl[val % 10];
+        leds |= points^0x01010101;
+
+        ASB2364_7SEGLEDS = leds;
+}
+
+void peripheral_leds7x4_display_hex(unsigned int val, unsigned int points)
+{
+        u32 leds;
+
+        leds = asb2364_led_hex_tbl[(val/1000) % 10];
+        leds <<= 8;
+        leds |= asb2364_led_hex_tbl[(val/100) % 10];
+        leds <<= 8;
+        leds |= asb2364_led_hex_tbl[(val/10) % 10];
+        leds <<= 8;
+        leds |= asb2364_led_hex_tbl[val % 10];
+        leds |= points^0x01010101;
+
+        ASB2364_7SEGLEDS = leds;
+}
+
+/* display triple horizontal bar and exception code */
+void peripheral_leds_display_exception(enum exception_code code)
+{
+        u32 leds;
+
+        leds = asb2364_led_hex_tbl[(code/0x100) % 0x10];
+        leds <<= 8;
+        leds |= asb2364_led_hex_tbl[(code/0x10) % 0x10];
+        leds <<= 8;
+        leds |= asb2364_led_hex_tbl[code % 0x10];
+        leds |= 0x6d010101;
+
+        ASB2364_7SEGLEDS = leds;
+}
+
+void peripheral_leds_led_chase(void)
+{
+        ASB2364_7SEGLEDS = asb2364_led_chase_tbl[asb2364_led_chase];
+        asb2364_led_chase++;
+        if (asb2364_led_chase >= 6)
+                asb2364_led_chase = 0;
+}
+#else  /* MN10300_USE_7SEGLEDS */
+void peripheral_leds7x4_display_dec(unsigned int val, unsigned int points) { }
+void peripheral_leds7x4_display_hex(unsigned int val, unsigned int points) { }
+void peripheral_leds_display_exception(enum exception_code code) { }
+void peripheral_leds_led_chase(void) { }
+#endif /* MN10300_USE_7SEGLEDS */