blob: 2bce137462e46a5b5ffa7753256fc841ed484350 (
plain) (
blame)
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
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/*
* linux/arch/arm/mach-sa1100/leds-hackkit.c
*
* based on leds-lart.c
*
* (C) Erik Mouw (J.A.K.Mouw@its.tudelft.nl), April 21, 2000
* (C) Stefan Eletzhofer <stefan.eletzhofer@eletztrick.de>, 2002
*
* The HackKit has two leds (GPIO 22/23). The red led (gpio 22) is used
* as cpu led, the green one is used as timer led.
*/
#include <linux/init.h>
#include <mach/hardware.h>
#include <asm/leds.h>
#include <asm/system.h>
#include "leds.h"
#define LED_STATE_ENABLED 1
#define LED_STATE_CLAIMED 2
static unsigned int led_state;
static unsigned int hw_led_state;
#define LED_GREEN GPIO_GPIO23
#define LED_RED GPIO_GPIO22
#define LED_MASK (LED_RED | LED_GREEN)
void hackkit_leds_event(led_event_t evt)
{
unsigned long flags;
local_irq_save(flags);
switch(evt) {
case led_start:
/* pin 22/23 are outputs */
GPDR |= LED_MASK;
hw_led_state = LED_MASK;
led_state = LED_STATE_ENABLED;
break;
case led_stop:
led_state &= ~LED_STATE_ENABLED;
break;
case led_claim:
led_state |= LED_STATE_CLAIMED;
hw_led_state = LED_MASK;
break;
case led_release:
led_state &= ~LED_STATE_CLAIMED;
hw_led_state = LED_MASK;
break;
#ifdef CONFIG_LEDS_TIMER
case led_timer:
if (!(led_state & LED_STATE_CLAIMED))
hw_led_state ^= LED_GREEN;
break;
#endif
#ifdef CONFIG_LEDS_CPU
case led_idle_start:
/* The LART people like the LED to be off when the
system is idle... */
if (!(led_state & LED_STATE_CLAIMED))
hw_led_state &= ~LED_RED;
break;
case led_idle_end:
/* ... and on if the system is not idle */
if (!(led_state & LED_STATE_CLAIMED))
hw_led_state |= LED_RED;
break;
#endif
case led_red_on:
if (led_state & LED_STATE_CLAIMED)
hw_led_state &= ~LED_RED;
break;
case led_red_off:
if (led_state & LED_STATE_CLAIMED)
hw_led_state |= LED_RED;
break;
case led_green_on:
if (led_state & LED_STATE_CLAIMED)
hw_led_state &= ~LED_GREEN;
break;
case led_green_off:
if (led_state & LED_STATE_CLAIMED)
hw_led_state |= LED_GREEN;
break;
default:
break;
}
/* Now set the GPIO state, or nothing will happen at all */
if (led_state & LED_STATE_ENABLED) {
GPSR = hw_led_state;
GPCR = hw_led_state ^ LED_MASK;
}
local_irq_restore(flags);
}
|
