1 files changed, 97 insertions, 0 deletions
diff --git a/drivers/input/misc/pcspkr.c b/drivers/input/misc/pcspkr.c
new file mode 100644
index 00000000000..3013194f462
--- /dev/null
+++ b/drivers/input/misc/pcspkr.c
@@ -0,0 +1,97 @@
+/*
+ *  PC Speaker beeper driver for Linux
+ *
+ *  Copyright (c) 2002 Vojtech Pavlik
+ *  Copyright (c) 1992 Orest Zborowski
+ *
+ */
+
+/*
+ * 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/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <asm/8253pit.h>
+#include <asm/io.h>
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_DESCRIPTION("PC Speaker beeper driver");
+MODULE_LICENSE("GPL");
+
+static char pcspkr_name[] = "PC Speaker";
+static char pcspkr_phys[] = "isa0061/input0";
+static struct input_dev pcspkr_dev;
+
+static DEFINE_SPINLOCK(i8253_beep_lock);
+
+static int pcspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
+{
+	unsigned int count = 0;
+	unsigned long flags;
+
+	if (type != EV_SND)
+		return -1;
+
+	switch (code) {
+		case SND_BELL: if (value) value = 1000;
+		case SND_TONE: break;
+		default: return -1;
+	}
+
+	if (value > 20 && value < 32767)
+		count = PIT_TICK_RATE / value;
+
+	spin_lock_irqsave(&i8253_beep_lock, flags);
+
+	if (count) {
+		/* enable counter 2 */
+		outb_p(inb_p(0x61) | 3, 0x61);
+		/* set command for counter 2, 2 byte write */
+		outb_p(0xB6, 0x43);
+		/* select desired HZ */
+		outb_p(count & 0xff, 0x42);
+		outb((count >> 8) & 0xff, 0x42);
+	} else {
+		/* disable counter 2 */
+		outb(inb_p(0x61) & 0xFC, 0x61);
+	}
+
+	spin_unlock_irqrestore(&i8253_beep_lock, flags);
+
+	return 0;
+}
+
+static int __init pcspkr_init(void)
+{
+	pcspkr_dev.evbit[0] = BIT(EV_SND);
+	pcspkr_dev.sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
+	pcspkr_dev.event = pcspkr_event;
+
+	pcspkr_dev.name = pcspkr_name;
+	pcspkr_dev.phys = pcspkr_phys;
+	pcspkr_dev.id.bustype = BUS_ISA;
+	pcspkr_dev.id.vendor = 0x001f;
+	pcspkr_dev.id.product = 0x0001;
+	pcspkr_dev.id.version = 0x0100;
+
+	input_register_device(&pcspkr_dev);
+
+        printk(KERN_INFO "input: %s\n", pcspkr_name);
+
+	return 0;
+}
+
+static void __exit pcspkr_exit(void)
+{
+        input_unregister_device(&pcspkr_dev);
+	/* turn off the speaker */
+	pcspkr_event(NULL, EV_SND, SND_BELL, 0);
+}
+
+module_init(pcspkr_init);
+module_exit(pcspkr_exit);