patch-2.4.22 linux-2.4.22/arch/arm/mach-sa1100/leds-hackkit.c

• Lines: 114
• Date: 2003-08-25 04:44:39.000000000 -0700
• Orig file: linux-2.4.21/arch/arm/mach-sa1100/leds-hackkit.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/arch/arm/mach-sa1100/leds-hackkit.c linux-2.4.22/arch/arm/mach-sa1100/leds-hackkit.c
@@ -0,0 +1,113 @@
+/*
+ * 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/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_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);
+}