2 * linux/arch/arm/mach-sa1100/leds-assabet.c
4 * Copyright (C) 2000 John Dorsey <john+@cs.cmu.edu>
6 * Original (leds-footbridge.c) by Russell King
8 * Assabet uses the LEDs as follows:
9 * - Green - toggles state every 50 timer interrupts
10 * - Red - on if system is not idle
12 #include <linux/init.h>
14 #include <mach/hardware.h>
16 #include <mach/assabet.h>
21 #define LED_STATE_ENABLED 1
22 #define LED_STATE_CLAIMED 2
24 static unsigned int led_state;
25 static unsigned int hw_led_state;
27 #define ASSABET_BCR_LED_MASK (ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED)
29 void assabet_leds_event(led_event_t evt)
33 local_irq_save(flags);
37 hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN;
38 led_state = LED_STATE_ENABLED;
42 led_state &= ~LED_STATE_ENABLED;
43 hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN;
44 ASSABET_BCR_frob(ASSABET_BCR_LED_MASK, hw_led_state);
48 led_state |= LED_STATE_CLAIMED;
49 hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN;
53 led_state &= ~LED_STATE_CLAIMED;
54 hw_led_state = ASSABET_BCR_LED_RED | ASSABET_BCR_LED_GREEN;
57 #ifdef CONFIG_LEDS_TIMER
59 if (!(led_state & LED_STATE_CLAIMED))
60 hw_led_state ^= ASSABET_BCR_LED_GREEN;
64 #ifdef CONFIG_LEDS_CPU
66 if (!(led_state & LED_STATE_CLAIMED))
67 hw_led_state |= ASSABET_BCR_LED_RED;
71 if (!(led_state & LED_STATE_CLAIMED))
72 hw_led_state &= ~ASSABET_BCR_LED_RED;
80 if (led_state & LED_STATE_CLAIMED)
81 hw_led_state &= ~ASSABET_BCR_LED_GREEN;
85 if (led_state & LED_STATE_CLAIMED)
86 hw_led_state |= ASSABET_BCR_LED_GREEN;
96 if (led_state & LED_STATE_CLAIMED)
97 hw_led_state &= ~ASSABET_BCR_LED_RED;
101 if (led_state & LED_STATE_CLAIMED)
102 hw_led_state |= ASSABET_BCR_LED_RED;
109 if (led_state & LED_STATE_ENABLED)
110 ASSABET_BCR_frob(ASSABET_BCR_LED_MASK, hw_led_state);
112 local_irq_restore(flags);