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|
arch/arm/Kconfig | 8 -
arch/arm/mach-ixp4xx/Makefile | 4
arch/arm/mach-ixp4xx/nslu2-leds.c | 223 ++++++++++++++++++++++++++++++++++++++
3 files changed, 232 insertions(+), 3 deletions(-)
--- linux-2.6.15/arch/arm/Kconfig 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.15/arch/arm/Kconfig 1970-01-01 00:00:00.000000000 +0000
@@ -418,7 +418,8 @@ config LEDS
ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
- ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE
+ ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
+ MACH_NSLU2
help
If you say Y here, the LEDs on your machine will be used
to provide useful information about your current system status.
@@ -432,7 +433,7 @@ config LEDS
config LEDS_TIMER
bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
- MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
+ MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 || MACH_NSLU2
depends on LEDS
default y if ARCH_EBSA110
help
@@ -448,7 +449,8 @@ config LEDS_TIMER
config LEDS_CPU
bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
- !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
+ !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 \
+ || MACH_NSLU2
depends on LEDS
help
If you say Y here, the red LED will be used to give a good real
--- linux-2.6.15/arch/arm/mach-ixp4xx/Makefile 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.15/arch/arm/mach-ixp4xx/Makefile 1970-01-01 00:00:00.000000000 +0000
@@ -10,3 +10,7 @@ obj-$(CONFIG_ARCH_ADI_COYOTE) += coyote-
obj-$(CONFIG_MACH_GTWX5715) += gtwx5715-pci.o gtwx5715-setup.o
obj-$(CONFIG_MACH_NSLU2) += nslu2-pci.o nslu2-setup.o nslu2-power.o
+leds-$(CONFIG_MACH_NSLU2) += nslu2-leds.o
+obj-$(CONFIG_LEDS) += $(leds-y)
+
+
--- linux-2.6.15/arch/arm/mach-ixp4xx/nslu2-leds.c 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.15/arch/arm/mach-ixp4xx/nslu2-leds.c 1970-01-01 00:00:00.000000000 +0000
@@ -0,0 +1,223 @@
+/*
+ * arch/arm/mach-ixp4xx/nslu2-leds.c
+ *
+ * NSLU2 LEDs driver
+ *
+ * Copyright (C) 2005 Tower Technologies
+ *
+ * based on nslu2-io.c
+ * Copyright (C) 2004 Karen Spearel
+ * and arch/arm/mach-footbridge/netwinder-leds.c
+ * Copyright (C) 1998-1999 Russell King
+ *
+ * Author: Alessandro Zummo <a.zummo@towertech.it>
+ * Maintainers: http://www.nslu2-linux.org/
+ *
+ * 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/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/notifier.h>
+
+#include <asm/hardware.h>
+#include <asm/leds.h>
+#include <asm/mach-types.h>
+#include <asm/system.h>
+
+#define LED_STATE_ENABLED 0x01
+#define LED_STATE_CLAIMED 0x02
+#define LED_STATE_IDLE 0x04
+
+static unsigned char led_state;
+static unsigned int hw_led_state;
+
+#ifdef CONFIG_LEDS_TIMER
+static const unsigned long idle_seq[4] = {
+ NSLU2_LED_GRN_BM, 0,
+ NSLU2_LED_GRN_BM, 0,
+};
+
+static const unsigned long busy_seq[4] = {
+ NSLU2_LED_GRN_BM, 0,
+ NSLU2_LED_GRN_BM | NSLU2_LED_RED_BM, 0,
+};
+#endif
+
+static unsigned char led_count = 0;
+
+static DEFINE_SPINLOCK(leds_lock);
+extern spinlock_t gpio_lock;
+
+static void nslu2_leds_event(led_event_t evt)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&leds_lock, flags);
+
+ switch (evt) {
+ case led_start:
+ /* Let's rock! Red led on, all others off. Remember
+ * that disk1/disk2 works inverted.
+ */
+ led_state = LED_STATE_ENABLED;
+ hw_led_state = NSLU2_LED_DISK1_BM | NSLU2_LED_DISK2_BM
+ | NSLU2_LED_RED_BM;
+ break;
+
+ case led_stop:
+ led_state &= ~LED_STATE_ENABLED;
+ break;
+
+ case led_claim:
+ /* The user claimed the interface, red and green off */
+ led_state |= LED_STATE_CLAIMED;
+ hw_led_state &= ~(NSLU2_LED_RED_BM | NSLU2_LED_GRN_BM);
+ break;
+
+ case led_release:
+ /* The user released the interface, preserve the last
+ * status of the leds, except red/green.
+ */
+ led_state &= ~LED_STATE_CLAIMED;
+ hw_led_state = *IXP4XX_GPIO_GPOUTR & 0x0000000C;
+ break;
+
+#ifdef CONFIG_LEDS_TIMER
+ case led_timer:
+ /* Pulse green led */
+ if (!(led_state & LED_STATE_CLAIMED))
+ {
+ /* clear red and green bits */
+ hw_led_state &= ~(NSLU2_LED_RED_BM | NSLU2_LED_GRN_BM);
+
+ /* copy the right sequence in */
+ if (led_state & LED_STATE_IDLE)
+ hw_led_state |= idle_seq[led_count % 4];
+ else
+ hw_led_state |= busy_seq[led_count % 4];
+
+ led_count++;
+ }
+ break;
+#endif
+
+#ifdef CONFIG_LEDS_CPU
+ case led_idle_start:
+ led_state |= LED_STATE_IDLE;
+#ifndef CONFIG_LEDS_TIMER
+ /* green on, red off */
+ hw_led_state |= NSLU2_LED_GRN_BM;
+ hw_led_state &= ~NSLU2_LED_RED_BM;
+#endif
+ break;
+
+ case led_idle_end:
+ led_state &= ~LED_STATE_IDLE;
+#ifndef CONFIG_LEDS_TIMER
+ /* green on, red on -> amber on */
+ hw_led_state |= NSLU2_LED_GRN_BM | NSLU2_LED_RED_BM;
+#endif
+ break;
+#endif /* CONFIG_LEDS_CPU */
+
+ case led_halted:
+ if (!(led_state & LED_STATE_CLAIMED))
+ hw_led_state |= NSLU2_LED_RED_BM;
+ break;
+
+ /* leds */
+
+ case led_green_on:
+ if (led_state & LED_STATE_CLAIMED)
+ hw_led_state |= NSLU2_LED_GRN_BM;
+ break;
+
+ case led_green_off:
+ if (led_state & LED_STATE_CLAIMED)
+ hw_led_state &= ~NSLU2_LED_GRN_BM;
+ break;
+
+ case led_amber_on:
+ if (led_state & LED_STATE_CLAIMED)
+ hw_led_state |= (NSLU2_LED_RED_BM | NSLU2_LED_GRN_BM);
+ break;
+
+ case led_amber_off:
+ if (led_state & LED_STATE_CLAIMED)
+ hw_led_state &= ~(NSLU2_LED_RED_BM | NSLU2_LED_GRN_BM);
+ break;
+
+ case led_red_on:
+ if (led_state & LED_STATE_CLAIMED)
+ hw_led_state |= NSLU2_LED_RED_BM;
+ break;
+
+ case led_red_off:
+ if (led_state & LED_STATE_CLAIMED)
+ hw_led_state &= ~NSLU2_LED_RED_BM;
+ break;
+
+ default:
+ break;
+ }
+
+ spin_unlock_irqrestore(&leds_lock, flags);
+
+ if (led_state & LED_STATE_ENABLED) {
+ spin_lock_irqsave(&gpio_lock, flags);
+ *IXP4XX_GPIO_GPOUTR = (*IXP4XX_GPIO_GPOUTR & 0xFFFFFFF0) | hw_led_state;
+ spin_unlock_irqrestore(&gpio_lock, flags);
+ }
+}
+
+static int nslu2_leds_panic_event(struct notifier_block *this, unsigned long event,
+ void *ptr)
+{
+#ifdef CONFIG_LEDS_TIMER
+ leds_event(led_claim);
+#endif
+ leds_event(led_green_off);
+ leds_event(led_red_on);
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block nslu2_leds_panic_block = {
+ .notifier_call = nslu2_leds_panic_event,
+};
+
+static int __init nslu2_leds_init(void)
+{
+ if (!(machine_is_nslu2()))
+ return 0;
+
+ printk(KERN_INFO "NSLU2: leds\n");
+
+ /* register panic notifier */
+ notifier_chain_register(&panic_notifier_list, &nslu2_leds_panic_block);
+
+ /* enable gpio 0-3 */
+ gpio_line_config(NSLU2_LED_GRN, IXP4XX_GPIO_OUT);
+ gpio_line_config(NSLU2_LED_RED, IXP4XX_GPIO_OUT);
+ gpio_line_config(NSLU2_LED_DISK1, IXP4XX_GPIO_OUT);
+ gpio_line_config(NSLU2_LED_DISK2, IXP4XX_GPIO_OUT);
+
+ leds_event = nslu2_leds_event;
+
+ /* this will also initialize the leds to the
+ * default state.
+ */
+
+ leds_event(led_start);
+
+ return 0;
+}
+
+module_init(nslu2_leds_init);
|
