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b920de1b DH |
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> | |
2f2a2132 | 19 | #include <unit/leds.h> |
b920de1b DH |
20 | |
21 | #if 0 | |
22 | static 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 | ||
28 | static 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 | ||
37 | static unsigned asb2303_led_chase; | |
38 | ||
39 | void 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 | ||
45 | void 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 | } |