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

• Lines: 130
• Date: Sun Aug 12 11:13:59 2001
• Orig file: v2.4.8/linux/arch/arm/mach-sa1100/leds-flexanet.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.8/linux/arch/arm/mach-sa1100/leds-flexanet.c linux/arch/arm/mach-sa1100/leds-flexanet.c
@@ -0,0 +1,129 @@
+/*
+ * linux/arch/arm/mach-sa1100/leds-flexanet.c
+ *
+ * by Jordi Colomer <jco@ict.es>
+ *
+ * Flexanet LEDs
+ *
+ *   - Red   - toggles state every 50 timer interrupts (Heartbeat)
+ *   - Green - on if system is not idle (CPU load)
+ */
+#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_bcr;
+static unsigned int hw_led_gpio;
+
+
+void flexanet_leds_event(led_event_t evt)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	switch (evt) {
+	case led_start:
+		/* start using LEDs and enable its hardware */
+		hw_led_bcr = BCR_LED_GREEN;
+		hw_led_gpio = GPIO_LED_RED;
+		led_state = LED_STATE_ENABLED;
+		break;
+
+	case led_stop:
+		/* disable LED h/w */
+		led_state &= ~LED_STATE_ENABLED;
+		break;
+
+	case led_claim:
+		/* select LEDs for direct access */
+		led_state |= LED_STATE_CLAIMED;
+		hw_led_bcr = 0;
+		hw_led_gpio = 0;
+		break;
+
+	case led_release:
+		/* release LEDs from direct access */
+		led_state &= ~LED_STATE_CLAIMED;
+		hw_led_bcr = 0;
+		hw_led_gpio = 0;
+		break;
+
+#ifdef CONFIG_LEDS_TIMER
+	case led_timer:
+		/* toggle heartbeat LED */
+		if (!(led_state & LED_STATE_CLAIMED))
+			hw_led_gpio ^= GPIO_LED_RED;
+		break;
+#endif
+
+#ifdef CONFIG_LEDS_CPU
+	case led_idle_start:
+		/* turn off CPU load LED */
+		if (!(led_state & LED_STATE_CLAIMED))
+			hw_led_bcr &= ~BCR_LED_GREEN;
+		break;
+
+	case led_idle_end:
+		/* turn on CPU load LED */
+		if (!(led_state & LED_STATE_CLAIMED))
+			hw_led_bcr |= BCR_LED_GREEN;
+		break;
+#endif
+
+	case led_halted:
+		break;
+
+
+	/* direct LED access (must be previously claimed) */
+	case led_green_on:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_bcr |= BCR_LED_GREEN;
+		break;
+
+	case led_green_off:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_bcr &= ~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_gpio |= GPIO_LED_RED;
+		break;
+
+	case led_red_off:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_gpio &= ~GPIO_LED_RED;
+		break;
+
+	default:
+		break;
+	}
+
+	if  (led_state & LED_STATE_ENABLED)
+	{
+		/* update LEDs */
+		BCR = BCR_value = (BCR_value & ~BCR_LED_GREEN) | hw_led_bcr;
+		GPSR = hw_led_gpio;
+		GPCR = hw_led_gpio ^ GPIO_LED_RED;
+	}
+
+	local_irq_restore(flags);
+}
+