1/* ASB2305 Peripheral 7-segment LEDs x4 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#include <asm/io.h>
15#include <asm/processor.h>
16#include <asm/intctl-regs.h>
17#include <asm/rtc-regs.h>
18#include <unit/leds.h>
19
20static const u8 asb2305_led_hex_tbl[16] = {
21	0x80, 0xf2, 0x48, 0x60, 0x32, 0x24, 0x04, 0xf0,
22	0x00, 0x20, 0x10, 0x06, 0x8c, 0x42, 0x0c, 0x1c
23};
24
25static const u32 asb2305_led_chase_tbl[6] = {
26	~0x02020202,	/* top		- segA */
27	~0x04040404,	/* right top	- segB */
28	~0x08080808,	/* right bottom	- segC */
29	~0x10101010,	/* bottom	- segD */
30	~0x20202020,	/* left bottom	- segE */
31	~0x40404040,	/* left top	- segF */
32};
33
34static unsigned asb2305_led_chase;
35
36void peripheral_leds7x4_display_dec(unsigned int val, unsigned int points)
37{
38	u32 leds;
39
40	leds = asb2305_led_hex_tbl[(val/1000) % 10];
41	leds <<= 8;
42	leds |= asb2305_led_hex_tbl[(val/100) % 10];
43	leds <<= 8;
44	leds |= asb2305_led_hex_tbl[(val/10) % 10];
45	leds <<= 8;
46	leds |= asb2305_led_hex_tbl[val % 10];
47	leds |= points^0x01010101;
48
49	ASB2305_7SEGLEDS = leds;
50}
51
52void peripheral_leds7x4_display_hex(unsigned int val, unsigned int points)
53{
54	u32 leds;
55
56	leds = asb2305_led_hex_tbl[(val/1000) % 10];
57	leds <<= 8;
58	leds |= asb2305_led_hex_tbl[(val/100) % 10];
59	leds <<= 8;
60	leds |= asb2305_led_hex_tbl[(val/10) % 10];
61	leds <<= 8;
62	leds |= asb2305_led_hex_tbl[val % 10];
63	leds |= points^0x01010101;
64
65	ASB2305_7SEGLEDS = leds;
66}
67
68void peripheral_leds_display_exception(enum exception_code code)
69{
70	u32 leds;
71
72	leds = asb2305_led_hex_tbl[(code/0x100) % 0x10];
73	leds <<= 8;
74	leds |= asb2305_led_hex_tbl[(code/0x10) % 0x10];
75	leds <<= 8;
76	leds |= asb2305_led_hex_tbl[code % 0x10];
77	leds |= 0x6d010101;
78
79	ASB2305_7SEGLEDS = leds;
80}
81
82void peripheral_leds7x4_display_minssecs(unsigned int time, unsigned int points)
83{
84	u32 leds;
85
86	leds = asb2305_led_hex_tbl[(time/600) % 6];
87	leds <<= 8;
88	leds |= asb2305_led_hex_tbl[(time/60) % 10];
89	leds <<= 8;
90	leds |= asb2305_led_hex_tbl[(time/10) % 6];
91	leds <<= 8;
92	leds |= asb2305_led_hex_tbl[time % 10];
93	leds |= points^0x01010101;
94
95	ASB2305_7SEGLEDS = leds;
96}
97
98void peripheral_leds7x4_display_rtc(void)
99{
100	unsigned int clock;
101	u8 mins, secs;
102
103	mins = RTMCR;
104	secs = RTSCR;
105
106	clock = ((mins & 0xf0) >> 4);
107	clock *= 10;
108	clock += (mins & 0x0f);
109	clock *= 6;
110
111	clock += ((secs & 0xf0) >> 4);
112	clock *= 10;
113	clock += (secs & 0x0f);
114
115	peripheral_leds7x4_display_minssecs(clock, 0);
116}
117
118void peripheral_leds_led_chase(void)
119{
120	ASB2305_7SEGLEDS = asb2305_led_chase_tbl[asb2305_led_chase];
121	asb2305_led_chase++;
122	if (asb2305_led_chase >= 6)
123		asb2305_led_chase = 0;
124}
125