leds.c

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/* ASB2303 peripheral 7-segment LEDs x1 support
 *
 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells ([email protected])
 *
 * 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>

#if 0
static const u8 asb2303_led_hex_tbl[16] = {
    0x80, 0xf2, 0x48, 0x60, 0x32, 0x24, 0x04, 0xf0,
    0x00, 0x20, 0x10, 0x06, 0x8c, 0x42, 0x0c, 0x1c
};
#endif

static const u8 asb2303_led_chase_tbl[6] = {
    ~0x02,  /* top      - segA */
    ~0x04,  /* right top    - segB */
    ~0x08,  /* right bottom - segC */
    ~0x10,  /* bottom   - segD */
    ~0x20,  /* left bottom  - segE */
    ~0x40,  /* left top - segF */
};

static unsigned asb2303_led_chase;

void peripheral_leds_display_exception(enum exception_code code)
{
    ASB2303_GPIO0DEF = 0x5555;  /* configure as an output port */
    ASB2303_7SEGLEDS = 0x6d;    /* triple horizontal bar */
}

void peripheral_leds_led_chase(void)
{
    ASB2303_GPIO0DEF = 0x5555;  /* configure as an output port */
    ASB2303_7SEGLEDS = asb2303_led_chase_tbl[asb2303_led_chase];
    asb2303_led_chase++;
    if (asb2303_led_chase >= 6)
        asb2303_led_chase = 0;
}