53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
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/* ASB2303 peripheral 7-segment LEDs x1 support
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/param.h>
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#include <linux/init.h>
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#include <asm/io.h>
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#include <asm/processor.h>
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#include <asm/intctl-regs.h>
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#include <asm/rtc-regs.h>
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#include <unit/leds.h>
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#if 0
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static const u8 asb2303_led_hex_tbl[16] = {
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0x80, 0xf2, 0x48, 0x60, 0x32, 0x24, 0x04, 0xf0,
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0x00, 0x20, 0x10, 0x06, 0x8c, 0x42, 0x0c, 0x1c
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};
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#endif
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static const u8 asb2303_led_chase_tbl[6] = {
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~0x02, /* top - segA */
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~0x04, /* right top - segB */
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~0x08, /* right bottom - segC */
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~0x10, /* bottom - segD */
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~0x20, /* left bottom - segE */
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~0x40, /* left top - segF */
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};
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static unsigned asb2303_led_chase;
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void peripheral_leds_display_exception(enum exception_code code)
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{
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ASB2303_GPIO0DEF = 0x5555; /* configure as an output port */
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ASB2303_7SEGLEDS = 0x6d; /* triple horizontal bar */
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}
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void peripheral_leds_led_chase(void)
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{
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ASB2303_GPIO0DEF = 0x5555; /* configure as an output port */
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ASB2303_7SEGLEDS = asb2303_led_chase_tbl[asb2303_led_chase];
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asb2303_led_chase++;
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if (asb2303_led_chase >= 6)
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asb2303_led_chase = 0;
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}
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