1/* leds.c: ASB2364 peripheral 7seg LEDs x4 support
2 *
3 * Copyright (C) 2002 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 License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12#include <linux/kernel.h>
13#include <linux/param.h>
14#include <linux/init.h>
15
16#include <asm/io.h>
17#include <asm/processor.h>
18#include <asm/intctl-regs.h>
19#include <asm/rtc-regs.h>
20#include <unit/leds.h>
21
22#if MN10300_USE_7SEGLEDS
23static const u8 asb2364_led_hex_tbl[16] = {
24	0x80, 0xf2, 0x48, 0x60, 0x32, 0x24, 0x04, 0xf0,
25	0x00, 0x20, 0x10, 0x06, 0x8c, 0x42, 0x0c, 0x1c
26};
27
28static const u32 asb2364_led_chase_tbl[6] = {
29	~0x02020202,	/* top		- segA */
30	~0x04040404,	/* right top	- segB */
31	~0x08080808,	/* right bottom	- segC */
32	~0x10101010,	/* bottom	- segD */
33	~0x20202020,	/* left bottom	- segE */
34	~0x40404040,	/* left top	- segF */
35};
36
37static unsigned asb2364_led_chase;
38
39void peripheral_leds7x4_display_dec(unsigned int val, unsigned int points)
40{
41	u32 leds;
42
43	leds = asb2364_led_hex_tbl[(val/1000) % 10];
44	leds <<= 8;
45	leds |= asb2364_led_hex_tbl[(val/100) % 10];
46	leds <<= 8;
47	leds |= asb2364_led_hex_tbl[(val/10) % 10];
48	leds <<= 8;
49	leds |= asb2364_led_hex_tbl[val % 10];
50	leds |= points^0x01010101;
51
52	ASB2364_7SEGLEDS = leds;
53}
54
55void peripheral_leds7x4_display_hex(unsigned int val, unsigned int points)
56{
57	u32 leds;
58
59	leds = asb2364_led_hex_tbl[(val/1000) % 10];
60	leds <<= 8;
61	leds |= asb2364_led_hex_tbl[(val/100) % 10];
62	leds <<= 8;
63	leds |= asb2364_led_hex_tbl[(val/10) % 10];
64	leds <<= 8;
65	leds |= asb2364_led_hex_tbl[val % 10];
66	leds |= points^0x01010101;
67
68	ASB2364_7SEGLEDS = leds;
69}
70
71/* display triple horizontal bar and exception code */
72void peripheral_leds_display_exception(enum exception_code code)
73{
74	u32 leds;
75
76	leds = asb2364_led_hex_tbl[(code/0x100) % 0x10];
77	leds <<= 8;
78	leds |= asb2364_led_hex_tbl[(code/0x10) % 0x10];
79	leds <<= 8;
80	leds |= asb2364_led_hex_tbl[code % 0x10];
81	leds |= 0x6d010101;
82
83	ASB2364_7SEGLEDS = leds;
84}
85
86void peripheral_leds_led_chase(void)
87{
88	ASB2364_7SEGLEDS = asb2364_led_chase_tbl[asb2364_led_chase];
89	asb2364_led_chase++;
90	if (asb2364_led_chase >= 6)
91		asb2364_led_chase = 0;
92}
93#else  /* MN10300_USE_7SEGLEDS */
94void peripheral_leds7x4_display_dec(unsigned int val, unsigned int points) { }
95void peripheral_leds7x4_display_hex(unsigned int val, unsigned int points) { }
96void peripheral_leds_display_exception(enum exception_code code) { }
97void peripheral_leds_led_chase(void) { }
98#endif /* MN10300_USE_7SEGLEDS */
99