98 lines
2.6 KiB
C
98 lines
2.6 KiB
C
/* leds.c: ASB2364 peripheral 7seg LEDs x4 support
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*
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* Copyright (C) 2002 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 License
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* as published by the Free Software Foundation; either version
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* 2 of the License, 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 MN10300_USE_7SEGLEDS
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static const u8 asb2364_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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static const u32 asb2364_led_chase_tbl[6] = {
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~0x02020202, /* top - segA */
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~0x04040404, /* right top - segB */
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~0x08080808, /* right bottom - segC */
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~0x10101010, /* bottom - segD */
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~0x20202020, /* left bottom - segE */
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~0x40404040, /* left top - segF */
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};
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static unsigned asb2364_led_chase;
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void peripheral_leds7x4_display_dec(unsigned int val, unsigned int points)
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{
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u32 leds;
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leds = asb2364_led_hex_tbl[(val/1000) % 10];
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leds <<= 8;
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leds |= asb2364_led_hex_tbl[(val/100) % 10];
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leds <<= 8;
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leds |= asb2364_led_hex_tbl[(val/10) % 10];
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leds <<= 8;
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leds |= asb2364_led_hex_tbl[val % 10];
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leds |= points^0x01010101;
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ASB2364_7SEGLEDS = leds;
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}
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void peripheral_leds7x4_display_hex(unsigned int val, unsigned int points)
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{
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u32 leds;
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leds = asb2364_led_hex_tbl[(val/1000) % 10];
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leds <<= 8;
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leds |= asb2364_led_hex_tbl[(val/100) % 10];
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leds <<= 8;
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leds |= asb2364_led_hex_tbl[(val/10) % 10];
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leds <<= 8;
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leds |= asb2364_led_hex_tbl[val % 10];
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leds |= points^0x01010101;
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ASB2364_7SEGLEDS = leds;
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}
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/* display triple horizontal bar and exception code */
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void peripheral_leds_display_exception(enum exception_code code)
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{
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u32 leds;
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leds = asb2364_led_hex_tbl[(code/0x100) % 0x10];
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leds <<= 8;
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leds |= asb2364_led_hex_tbl[(code/0x10) % 0x10];
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leds <<= 8;
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leds |= asb2364_led_hex_tbl[code % 0x10];
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leds |= 0x6d010101;
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ASB2364_7SEGLEDS = leds;
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}
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void peripheral_leds_led_chase(void)
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{
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ASB2364_7SEGLEDS = asb2364_led_chase_tbl[asb2364_led_chase];
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asb2364_led_chase++;
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if (asb2364_led_chase >= 6)
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asb2364_led_chase = 0;
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}
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#else /* MN10300_USE_7SEGLEDS */
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void peripheral_leds7x4_display_dec(unsigned int val, unsigned int points) { }
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void peripheral_leds7x4_display_hex(unsigned int val, unsigned int points) { }
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void peripheral_leds_display_exception(enum exception_code code) { }
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void peripheral_leds_led_chase(void) { }
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#endif /* MN10300_USE_7SEGLEDS */
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