[ARM PATCH] 1169/1: Add support for LEDS on BadgePAD 4

Add support for LEDS on BadgePAD 4.

Christopher Hoover
mailto:ch@murgatroid.com
mailto:ch@hpl.hp.com

arch/arm/mach-sa1100/Makefile

@@ -40,6 +40,7 @@ obj-$(CONFIG_ASSABET_NEPONSET)		+= neponset.o
 
 obj-$(CONFIG_SA1100_BADGE4)		+= badge4.o
 export-objs				+= badge4.o
+led-$(CONFIG_SA1100_BADGE4)		+= leds-badge4.o
 
 obj-$(CONFIG_SA1100_BRUTUS)		+= brutus.o
 led-$(CONFIG_SA1100_BRUTUS)		+= leds-brutus.o

arch/arm/mach-sa1100/leds-badge4.c

+/*
+ * linux/arch/arm/mach-sa1100/leds-badge4.c
+ *
+ * Author: Christopher Hoover <ch@hpl.hp.com>
+ * Copyright (C) 2002 Hewlett-Packard Company
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#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_RED		GPIO_GPIO(7)
+#define LED_GREEN       GPIO_GPIO(9)
+#define LED_MASK	(LED_RED|LED_GREEN)
+
+#define LED_IDLE	LED_GREEN
+#define LED_TIMER	LED_RED
+
+void badge4_leds_event(led_event_t evt)
+{
+        unsigned long flags;
+
+	local_irq_save(flags);
+
+        switch (evt) {
+        case led_start:
+		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_TIMER;
+                break;
+#endif
+
+#ifdef CONFIG_LEDS_CPU
+        case led_idle_start:
+		/* LED off when system is idle */
+                if (!(led_state & LED_STATE_CLAIMED))
+                        hw_led_state &= ~LED_IDLE;
+                break;
+
+        case led_idle_end:
+                if (!(led_state & LED_STATE_CLAIMED))
+                        hw_led_state |= LED_IDLE;
+                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;
+        }
+
+        if  (led_state & LED_STATE_ENABLED) {
+                GPSR = hw_led_state;
+                GPCR = hw_led_state ^ LED_MASK;
+        }
+
+	local_irq_restore(flags);
+}

arch/arm/mach-sa1100/leds.c

@@ -19,6 +19,8 @@ sa1100_leds_init(void)
 		leds_event = assabet_leds_event;
  	if (machine_is_consus())
  	        leds_event = consus_leds_event;
+	if (machine_is_badge4())
+	  	leds_event = badge4_leds_event;
 	if (machine_is_brutus())
 		leds_event = brutus_leds_event;
 	if (machine_is_cerf())

arch/arm/mach-sa1100/leds.h

 extern void assabet_leds_event(led_event_t evt);
+extern void badge4_leds_event(led_event_t evt);
 extern void consus_leds_event(led_event_t evt);
 extern void brutus_leds_event(led_event_t evt);
 extern void cerf_leds_event(led_event_t evt);