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-rw-r--r--arch/mn10300/unit-asb2305/leds.c124
1 files changed, 124 insertions, 0 deletions
diff --git a/arch/mn10300/unit-asb2305/leds.c b/arch/mn10300/unit-asb2305/leds.c
new file mode 100644
index 000000000000..e99dcc9cee1a
--- /dev/null
+++ b/arch/mn10300/unit-asb2305/leds.c
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+/* ASB2305 Peripheral 7-segment LEDs x4 support
+ *
+ * Copyright (C) 2007 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 Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, 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/cpu/intctl-regs.h>
+#include <asm/cpu/rtc-regs.h>
+#include <asm/unit/leds.h>
+
+static const u8 asb2305_led_hex_tbl[16] = {
+ 0x80, 0xf2, 0x48, 0x60, 0x32, 0x24, 0x04, 0xf0,
+ 0x00, 0x20, 0x10, 0x06, 0x8c, 0x42, 0x0c, 0x1c
+};
+
+static const u32 asb2305_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 asb2305_led_chase;
+
+void peripheral_leds7x4_display_dec(unsigned int val, unsigned int points)
+{
+ u32 leds;
+
+ leds = asb2305_led_hex_tbl[(val/1000) % 10];
+ leds <<= 8;
+ leds |= asb2305_led_hex_tbl[(val/100) % 10];
+ leds <<= 8;
+ leds |= asb2305_led_hex_tbl[(val/10) % 10];
+ leds <<= 8;
+ leds |= asb2305_led_hex_tbl[val % 10];
+ leds |= points^0x01010101;
+
+ ASB2305_7SEGLEDS = leds;
+}
+
+void peripheral_leds7x4_display_hex(unsigned int val, unsigned int points)
+{
+ u32 leds;
+
+ leds = asb2305_led_hex_tbl[(val/1000) % 10];
+ leds <<= 8;
+ leds |= asb2305_led_hex_tbl[(val/100) % 10];
+ leds <<= 8;
+ leds |= asb2305_led_hex_tbl[(val/10) % 10];
+ leds <<= 8;
+ leds |= asb2305_led_hex_tbl[val % 10];
+ leds |= points^0x01010101;
+
+ ASB2305_7SEGLEDS = leds;
+}
+
+void peripheral_leds_display_exception(enum exception_code code)
+{
+ u32 leds;
+
+ leds = asb2305_led_hex_tbl[(code/0x100) % 0x10];
+ leds <<= 8;
+ leds |= asb2305_led_hex_tbl[(code/0x10) % 0x10];
+ leds <<= 8;
+ leds |= asb2305_led_hex_tbl[code % 0x10];
+ leds |= 0x6d010101;
+
+ ASB2305_7SEGLEDS = leds;
+}
+
+void peripheral_leds7x4_display_minssecs(unsigned int time, unsigned int points)
+{
+ u32 leds;
+
+ leds = asb2305_led_hex_tbl[(time/600) % 6];
+ leds <<= 8;
+ leds |= asb2305_led_hex_tbl[(time/60) % 10];
+ leds <<= 8;
+ leds |= asb2305_led_hex_tbl[(time/10) % 6];
+ leds <<= 8;
+ leds |= asb2305_led_hex_tbl[time % 10];
+ leds |= points^0x01010101;
+
+ ASB2305_7SEGLEDS = leds;
+}
+
+void peripheral_leds7x4_display_rtc(void)
+{
+ unsigned int clock;
+ u8 mins, secs;
+
+ mins = RTMCR;
+ secs = RTSCR;
+
+ clock = ((mins & 0xf0) >> 4);
+ clock *= 10;
+ clock += (mins & 0x0f);
+ clock *= 6;
+
+ clock += ((secs & 0xf0) >> 4);
+ clock *= 10;
+ clock += (secs & 0x0f);
+
+ peripheral_leds7x4_display_minssecs(clock, 0);
+}
+
+void peripheral_leds_led_chase(void)
+{
+ ASB2305_7SEGLEDS = asb2305_led_chase_tbl[asb2305_led_chase];
+ asb2305_led_chase++;
+ if (asb2305_led_chase >= 6)
+ asb2305_led_chase = 0;
+}