patch-2.4.9 linux/arch/arm/mach-sa1100/leds-lart.c

• Lines: 103
• Date: Sun Aug 12 17:36:24 2001
• Orig file: v2.4.8/linux/arch/arm/mach-sa1100/leds-lart.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.8/linux/arch/arm/mach-sa1100/leds-lart.c linux/arch/arm/mach-sa1100/leds-lart.c
@@ -0,0 +1,102 @@
+/*
+ * linux/arch/arm/mach-sa1100/leds-lart.c
+ *
+ * (C) Erik Mouw (J.A.K.Mouw@its.tudelft.nl), April 21, 2000
+ *
+ * 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/init.h>
+
+#include <asm/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_23    GPIO_GPIO23
+#define LED_MASK  (LED_23)
+
+void lart_leds_event(led_event_t evt)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	switch(evt) {
+	case led_start:
+		/* pin 23 is output pin */
+		GPDR |= LED_23;
+		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;
+	}
+
+	local_irq_restore(flags);
+}