patch-2.4.3 linux/arch/arm/mach-integrator/leds.c

• Lines: 95
• Date: Fri Mar 2 18:38:39 2001
• Orig file: v2.4.2/linux/arch/arm/mach-integrator/leds.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.2/linux/arch/arm/mach-integrator/leds.c linux/arch/arm/mach-integrator/leds.c
@@ -0,0 +1,94 @@
+/*
+ *  linux/arch/arm/mach-integrator/leds.c
+ *
+ *  Integrator LED control routines
+ *
+ *  Copyright (C) 1999 ARM Limited
+ *  Copyright (C) 2000 Deep Blue Solutions Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/leds.h>
+#include <asm/system.h>
+#include <asm/mach-types.h>
+
+static int saved_leds;
+
+static void integrator_leds_event(led_event_t ledevt)
+{
+	unsigned long flags;
+	const unsigned int dbg_base = IO_ADDRESS(INTEGRATOR_DBG_BASE);
+	const unsigned int hdr_ctrl = IO_ADDRESS(INTEGRATOR_HDR_BASE) +
+					INTEGRATOR_HDR_CTRL_OFFSET;
+	unsigned int ctrl;
+	unsigned int update_alpha_leds;
+	
+	// yup, change the LEDs
+	local_irq_save(flags);
+	update_alpha_leds = 0;
+
+	switch(ledevt) {
+	case led_idle_start:
+		ctrl = __raw_readl(hdr_ctrl);
+		ctrl &= ~INTEGRATOR_HDR_CTRL_LED;
+		__raw_writel(ctrl, hdr_ctrl);
+		break;
+
+	case led_idle_end:
+		ctrl = __raw_readl(hdr_ctrl);
+		ctrl |= INTEGRATOR_HDR_CTRL_LED;
+		__raw_writel(ctrl, hdr_ctrl);
+		break;
+
+	case led_timer:
+		saved_leds ^= GREEN_LED;
+		update_alpha_leds = 1;
+		break;
+
+	case led_red_on:
+		saved_leds |= RED_LED;
+		update_alpha_leds = 1;
+		break;
+
+	case led_red_off:
+		saved_leds &= ~RED_LED;
+		update_alpha_leds = 1;
+		break;
+
+	default:
+		break;
+	}
+
+	if (update_alpha_leds) {
+		while (__raw_readl(dbg_base + INTEGRATOR_DBG_ALPHA_OFFSET) & 1);
+		__raw_writel(saved_leds, dbg_base + INTEGRATOR_DBG_LEDS_OFFSET);
+	}
+	local_irq_restore(flags);
+}
+
+static int __init leds_init(void)
+{
+	if (machine_is_integrator())
+		leds_event = integrator_leds_event;
+
+	return 0;
+}
+
+__initcall(leds_init);