patch-2.4.0-test2 linux/arch/arm/kernel/leds-sa1100.c

• Lines: 334
• Date: Mon Jun 19 17:59:34 2000
• Orig file: v2.4.0-test1/linux/arch/arm/kernel/leds-sa1100.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test1/linux/arch/arm/kernel/leds-sa1100.c linux/arch/arm/kernel/leds-sa1100.c
@@ -0,0 +1,333 @@
+/*
+ *  linux/arch/arm/kernel/leds-sa1100.c
+ *
+ *  Copyright (C) 2000 John Dorsey <john+@cs.cmu.edu>
+ *
+ *  Original (leds-footbridge.c) by Russell King
+ *
+ *  Added Brutus LEDs support
+ *	Nicolas Pitre, Mar 19, 2000
+ *
+ *  Added LART LED support
+ *      Erik Mouw (J.A.K.Mouw@its.tudelft.nl), April 21, 2000
+ *
+ *
+ *  Assabet uses the LEDs as follows:
+ *   - Green - toggles state every 50 timer interrupts
+ *   - Red   - on if system is not idle
+ *
+ *  Brutus uses the LEDs as follows:
+ *   - D3 (Green, GPIO9) - toggles state every 50 timer interrupts
+ *   - D17 (Red, GPIO20) - on if system is not idle
+ *   - D4 (Green, GPIO8) - misc function
+ *
+ *  LART uses the LED as follows:
+ *   - GPIO23 is the LED, on if system is not idle
+ *  You can use both CONFIG_LEDS_CPU and CONFIG_LEDS_TIMER at the same
+ *  time, but in that case the timer events will still dictate the
+ *  pace of the LED.
+ * 
+ */
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+
+#include <asm/hardware.h>
+#include <asm/leds.h>
+#include <asm/system.h>
+
+
+#define LED_STATE_ENABLED	1
+#define LED_STATE_CLAIMED	2
+
+static unsigned int led_state;
+static unsigned int hw_led_state;
+
+
+#ifdef CONFIG_SA1100_ASSABET
+
+#define BCR_LED_MASK	(BCR_LED_GREEN | BCR_LED_RED)
+
+static void assabet_leds_event(led_event_t evt)
+{
+	unsigned long flags;
+
+	save_flags_cli(flags);
+
+	switch (evt) {
+	case led_start:
+		hw_led_state = BCR_LED_RED | BCR_LED_GREEN;
+		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 = BCR_LED_RED | BCR_LED_GREEN;
+		break;
+
+	case led_release:
+		led_state &= ~LED_STATE_CLAIMED;
+		hw_led_state = BCR_LED_RED | BCR_LED_GREEN;
+		break;
+
+#ifdef CONFIG_LEDS_TIMER
+	case led_timer:
+		if (!(led_state & LED_STATE_CLAIMED))
+			hw_led_state ^= BCR_LED_GREEN;
+		break;
+#endif
+
+#ifdef CONFIG_LEDS_CPU
+	case led_idle_start:
+		if (!(led_state & LED_STATE_CLAIMED))
+			hw_led_state |= BCR_LED_RED;
+		break;
+
+	case led_idle_end:
+		if (!(led_state & LED_STATE_CLAIMED))
+			hw_led_state &= ~BCR_LED_RED;
+		break;
+#endif
+
+	case led_green_on:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state &= ~BCR_LED_GREEN;
+		break;
+
+	case led_green_off:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state |= BCR_LED_GREEN;
+		break;
+
+	case led_amber_on:
+		break;
+
+	case led_amber_off:
+		break;
+
+	case led_red_on:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state &= ~BCR_LED_RED;
+		break;
+
+	case led_red_off:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state |= BCR_LED_RED;
+		break;
+
+	default:
+		break;
+	}
+
+	if  (led_state & LED_STATE_ENABLED)
+		BCR = BCR_value = (BCR_value & ~BCR_LED_MASK) | hw_led_state;
+
+	restore_flags(flags);
+}
+
+#endif /* CONFIG_SA1100_ASSABET */
+
+#ifdef CONFIG_SA1100_BRUTUS
+
+#define LED_D3		GPIO_GPIO(9)
+#define LED_D4		GPIO_GPIO(8)
+#define LED_D17		GPIO_GPIO(20)
+#define LED_MASK	(LED_D3|LED_D4|LED_D17)
+
+static void brutus_leds_event(led_event_t evt)
+{
+	unsigned long flags;
+
+	save_flags_cli(flags);
+
+	switch (evt) {
+	case led_start:
+		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_D3;
+		break;
+#endif
+
+#ifdef CONFIG_LEDS_CPU
+	case led_idle_start:
+		if (!(led_state & LED_STATE_CLAIMED))
+			hw_led_state |= LED_D17;
+		break;
+
+	case led_idle_end:
+		if (!(led_state & LED_STATE_CLAIMED))
+			hw_led_state &= ~LED_D17;
+		break;
+#endif
+
+	case led_green_on:
+		hw_led_state &= ~LED_D4;
+		break;
+
+	case led_green_off:
+		hw_led_state |= LED_D4;
+		break;
+
+	case led_amber_on:
+		break;
+
+	case led_amber_off:
+		break;
+
+	case led_red_on:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state &= ~LED_D17;
+		break;
+
+	case led_red_off:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state |= LED_D17;
+		break;
+
+	default:
+		break;
+	}
+
+	if  (led_state & LED_STATE_ENABLED) {
+		GPSR = hw_led_state;
+		GPCR = hw_led_state ^ LED_MASK;
+	}
+
+	restore_flags(flags);
+}
+
+#endif /* CONFIG_SA1100_BRUTUS */
+
+#ifdef CONFIG_SA1100_LART
+
+#define LED_23    GPIO_GPIO23
+#define LED_MASK  (LED_23)
+
+
+static void lart_leds_event(led_event_t evt)
+{
+	unsigned long flags;
+
+	save_flags_cli(flags);
+
+	switch(evt) {
+	case led_start:
+		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_23;
+		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_23;
+		break;
+
+	case led_idle_end:
+		/* ... and on if the system is not idle */
+		if (!(led_state & LED_STATE_CLAIMED))
+			hw_led_state |= LED_23;
+		break;
+#endif
+
+	case led_red_on:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state &= ~LED_23;
+		break;
+
+	case led_red_off:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state |= LED_23;
+		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;
+	}
+
+	restore_flags(flags);
+}
+
+#endif /* CONFIG_SA1100_LART */
+
+static void dummy_leds_event(led_event_t evt)
+{
+}
+
+void (*leds_event)(led_event_t) = dummy_leds_event;
+
+EXPORT_SYMBOL(leds_event);
+
+static int __init
+sa1100_leds_init(void)
+{
+#ifdef CONFIG_SA1100_ASSABET
+	if (machine_is_assabet())
+		leds_event = assabet_leds_event;
+#endif
+#ifdef CONFIG_SA1100_BRUTUS
+	if (machine_is_brutus())
+		leds_event = brutus_leds_event;
+#endif
+#ifdef CONFIG_SA1100_LART
+	if (machine_is_lart())
+		leds_event = lart_leds_event;
+#endif
+
+	leds_event(led_start);
+	return 0;
+}
+
+__initcall(sa1100_leds_init);