patch-2.2.18 linux/arch/arm/kernel/leds-footbridge.c

• Lines: 246
• Date: Fri Sep 15 23:28:37 2000
• Orig file: v2.2.17/arch/arm/kernel/leds-footbridge.c
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/arch/arm/kernel/leds-footbridge.c linux/arch/arm/kernel/leds-footbridge.c
@@ -0,0 +1,245 @@
+/*
+ * arch/arm/kernel/leds-footbridge.c
+ *
+ * Copyright (C) 1998-1999 Russell King
+ *
+ * EBSA-285 and NetWinder LED control routines.
+ *
+ * The EBSA-285 uses the leds as follows:
+ *  - Green - toggles state every 50 timer interrupts
+ *  - Amber - On if system is not idle
+ *  - Red   - currently unused
+ *
+ * The Netwinder uses the leds as follows:
+ *  - Green - toggles state every 50 timer interrupts
+ *  - Red   - On if the system is not idle
+ *
+ * Changelog:
+ *   02-05-1999	RMK	Various cleanups
+ */
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include <asm/spinlock.h>
+#include <asm/hardware.h>
+#include <asm/leds.h>
+#include <asm/system.h>
+
+#define LED_STATE_ENABLED	1
+#define LED_STATE_CLAIMED	2
+static char led_state;
+static char hw_led_state;
+
+static spinlock_t leds_lock = SPIN_LOCK_UNLOCKED;
+extern spinlock_t gpio_lock;
+
+#ifdef CONFIG_FOOTBRIDGE
+
+static void __ebsa285_text ebsa285_leds_event(led_event_t evt)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&leds_lock, flags);
+
+	switch (evt) {
+	case led_start:
+		hw_led_state = XBUS_LED_RED | XBUS_LED_GREEN;
+#ifndef CONFIG_LEDS_IDLE
+		hw_led_state |= XBUS_LED_AMBER;
+#endif
+		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 = XBUS_LED_RED | XBUS_LED_GREEN | XBUS_LED_AMBER;
+		break;
+
+	case led_release:
+		led_state &= ~LED_STATE_CLAIMED;
+		hw_led_state = XBUS_LED_RED | XBUS_LED_GREEN | XBUS_LED_AMBER;
+		break;
+
+#ifdef CONFIG_LEDS_TIMER
+	case led_timer:
+		if (!(led_state & LED_STATE_CLAIMED))
+			hw_led_state ^= XBUS_LED_GREEN;
+		break;
+#endif
+
+#ifdef CONFIG_LEDS_CPU
+	case led_idle_start:
+		if (!(led_state & LED_STATE_CLAIMED))
+			hw_led_state |= XBUS_LED_RED;
+		break;
+
+	case led_idle_end:
+		if (!(led_state & LED_STATE_CLAIMED))
+			hw_led_state &= ~XBUS_LED_RED;
+		break;
+#endif
+
+	case led_green_on:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state &= ~XBUS_LED_GREEN;
+		break;
+
+	case led_green_off:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state |= XBUS_LED_GREEN;
+		break;
+
+	case led_amber_on:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state &= ~XBUS_LED_AMBER;
+		break;
+
+	case led_amber_off:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state |= XBUS_LED_AMBER;
+		break;
+
+	case led_red_on:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state &= ~XBUS_LED_RED;
+		break;
+
+	case led_red_off:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state |= XBUS_LED_RED;
+		break;
+
+	default:
+		break;
+	}
+
+	if  (led_state & LED_STATE_ENABLED)
+		*XBUS_LEDS = hw_led_state;
+
+	spin_unlock_irqrestore(&leds_lock, flags);
+}
+
+#endif
+
+#ifdef CONFIG_ARCH_NETWINDER
+
+static void __netwinder_text netwinder_leds_event(led_event_t evt)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&leds_lock, flags);
+
+	switch (evt) {
+	case led_start:
+		led_state |= LED_STATE_ENABLED;
+		hw_led_state = GPIO_GREEN_LED;
+		break;
+
+	case led_stop:
+		led_state &= ~LED_STATE_ENABLED;
+		break;
+
+	case led_claim:
+		led_state |= LED_STATE_CLAIMED;
+		hw_led_state = 0;
+		break;
+
+	case led_release:
+		led_state &= ~LED_STATE_CLAIMED;
+		hw_led_state = 0;
+		break;
+
+#ifdef CONFIG_LEDS_TIMER
+	case led_timer:
+		if (!(led_state & LED_STATE_CLAIMED))
+			hw_led_state ^= GPIO_GREEN_LED;
+		break;
+#endif
+
+#ifdef CONFIG_LEDS_CPU
+	case led_idle_start:
+		if (!(led_state & LED_STATE_CLAIMED))
+			hw_led_state &= ~GPIO_RED_LED;
+		break;
+
+	case led_idle_end:
+		if (!(led_state & LED_STATE_CLAIMED))
+			hw_led_state |= GPIO_RED_LED;
+		break;
+#endif
+
+	case led_green_on:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state |= GPIO_GREEN_LED;
+		break;
+
+	case led_green_off:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state &= ~GPIO_GREEN_LED;
+		break;
+
+	case led_amber_on:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state |= GPIO_GREEN_LED | GPIO_RED_LED;
+		break;
+
+	case led_amber_off:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state &= ~(GPIO_GREEN_LED | GPIO_RED_LED);
+		break;
+
+	case led_red_on:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state |= GPIO_RED_LED;
+		break;
+
+	case led_red_off:
+		if (led_state & LED_STATE_CLAIMED)
+			hw_led_state &= ~GPIO_RED_LED;
+		break;
+
+	default:
+		break;
+	}
+
+	spin_unlock_irqrestore(&leds_lock, flags);
+
+	if  (led_state & LED_STATE_ENABLED) {
+		spin_lock_irqsave(&gpio_lock, flags);
+		gpio_modify_op(GPIO_RED_LED | GPIO_GREEN_LED, hw_led_state);
+		spin_unlock_irqrestore(&gpio_lock, flags);
+	}
+}
+
+#endif
+
+static void dummy_leds_event(led_event_t evt)
+{
+}
+
+static void __init
+init_leds_event(led_event_t evt)
+{
+	leds_event = dummy_leds_event;
+
+#ifdef CONFIG_FOOTBRIDGE
+	if (machine_is_ebsa285() || machine_is_co285())
+		leds_event = ebsa285_leds_event;
+#endif
+#ifdef CONFIG_ARCH_NETWINDER
+	if (machine_is_netwinder())
+		leds_event = netwinder_leds_event;
+#endif
+
+	leds_event(evt);
+}
+
+void (*leds_event)(led_event_t) = init_leds_event;
+
+EXPORT_SYMBOL(leds_event);