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/intctl-regs.h>
#include <asm/rtc-regs.h>
#include <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;
}