1/* ASB2303 peripheral 7-segment LEDs x1 support
2 *
3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public Licence
8 * as published by the Free Software Foundation; either version
9 * 2 of the Licence, or (at your option) any later version.
10 */
11#include <linux/kernel.h>
12#include <linux/param.h>
13#include <linux/init.h>
14
15#include <asm/io.h>
16#include <asm/processor.h>
17#include <asm/intctl-regs.h>
18#include <asm/rtc-regs.h>
19#include <unit/leds.h>
20
21#if 0
22static const u8 asb2303_led_hex_tbl[16] = {
23	0x80, 0xf2, 0x48, 0x60, 0x32, 0x24, 0x04, 0xf0,
24	0x00, 0x20, 0x10, 0x06, 0x8c, 0x42, 0x0c, 0x1c
25};
26#endif
27
28static const u8 asb2303_led_chase_tbl[6] = {
29	~0x02,	/* top		- segA */
30	~0x04,	/* right top	- segB */
31	~0x08,	/* right bottom	- segC */
32	~0x10,	/* bottom	- segD */
33	~0x20,	/* left bottom	- segE */
34	~0x40,	/* left top	- segF */
35};
36
37static unsigned asb2303_led_chase;
38
39void peripheral_leds_display_exception(enum exception_code code)
40{
41	ASB2303_GPIO0DEF = 0x5555;	/* configure as an output port */
42	ASB2303_7SEGLEDS = 0x6d;	/* triple horizontal bar */
43}
44
45void peripheral_leds_led_chase(void)
46{
47	ASB2303_GPIO0DEF = 0x5555;	/* configure as an output port */
48	ASB2303_7SEGLEDS = asb2303_led_chase_tbl[asb2303_led_chase];
49	asb2303_led_chase++;
50	if (asb2303_led_chase >= 6)
51		asb2303_led_chase = 0;
52}
53