leds.c
1.44 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
/* ASB2303 peripheral 7-segment LEDs x1 support
*
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* 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;
}