patch-2.4.19 linux-2.4.19/arch/arm/mach-sa1100/leds-frodo.c

• Lines: 122
• Date: Fri Aug 2 17:39:42 2002
• Orig file: linux-2.4.18/arch/arm/mach-sa1100/leds-frodo.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/arm/mach-sa1100/leds-frodo.c linux-2.4.19/arch/arm/mach-sa1100/leds-frodo.c
@@ -0,0 +1,121 @@
+
+/*
+ * linux/arch/arm/mach-sa1100/leds-frodo.c
+ *
+ * Author: Abraham van der Merwe <abraham@2d3d.co.za>
+ *
+ * This file contains the 2d3D, Inc. SA-1110 Development Board LED
+ * event handler.
+ *
+ * Frodo LEDs
+ *
+ *   - led6 - toggles state every 50 timer interrupts (Heartbeat)
+ *   - led7 - 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 led6_on() FRODO_CPLD_GENERAL |= FRODO_LED2
+#define led6_off() FRODO_CPLD_GENERAL &= ~FRODO_LED2
+#define led6_invert() do {						\
+		if ((FRODO_CPLD_GENERAL & FRODO_LED2))	\
+			led6_off ();						\
+		else									\
+			led6_on ();							\
+	} while (0)
+
+#define led7_on() FRODO_CPLD_GENERAL |= FRODO_LED1
+#define led7_off() FRODO_CPLD_GENERAL &= ~FRODO_LED1
+#define led7_invert() do {						\
+		if ((FRODO_CPLD_GENERAL & FRODO_LED1))	\
+			led7_off ();						\
+		else									\
+			led7_on ();							\
+	} while (0)
+
+static int claimed;
+
+void frodo_leds_event (led_event_t evt)
+{
+   unsigned long flags;
+
+   local_irq_save (flags);
+
+   switch (evt)
+	 {
+#ifdef CONFIG_LEDS_CPU
+		/* turn off CPU load LED */
+	  case led_idle_start:
+		if (!claimed) led7_off ();
+		break;
+
+		/* turn on CPU load LED */
+	  case led_idle_end:
+		if (!claimed) led7_on ();
+		break;
+#endif
+
+#ifdef CONFIG_LEDS_TIMER
+		/* toggle heartbeat LED */
+	  case led_timer:
+		if (!claimed) led6_invert ();
+		break;
+#endif
+
+		/* start: turn on LEDs and set claimed to 0 */
+	  case led_start:
+		led6_on ();
+		led7_on ();
+		claimed = 0;
+		break;
+
+		/* stop: turn off LEDs */
+	  case led_stop:
+		led6_off ();
+		led7_off ();
+		break;
+
+		/* override CPU load & timer LEDs */
+	  case led_claim:
+		claimed = 1;
+		break;
+
+		/* restore CPU load & timer LEDs */
+	  case led_release:
+		claimed = 0;
+		break;
+
+		/* direct LED access (must be previously claimed) */
+
+		/* led7 */
+	  case led_green_on:
+		if (claimed) led7_on ();
+		break;
+
+	  case led_green_off:
+		if (claimed) led7_off ();
+		break;
+
+		/* led6 -- at the moment this is actually also green */
+	  case led_red_on:
+		if (claimed) led6_on ();
+		break;
+
+	  case led_red_off:
+		if (claimed) led6_off ();
+		break;
+
+	  default:
+		break;
+	}
+
+   local_irq_restore (flags);
+}
+