1 files changed, 116 insertions, 0 deletions

diff --git a/sound/drivers/pcsp/pcsp_input.c b/sound/drivers/pcsp/pcsp_input.c
new file mode 100644
index 000000000000..cd9b83e7f7d1
--- /dev/null
+++ b/sound/drivers/pcsp/pcsp_input.c
@@ -0,0 +1,116 @@
+/*
+ *  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/init.h>
+#include <linux/input.h>
+#include <asm/io.h>
+#include "pcsp.h"
+
+static void pcspkr_do_sound(unsigned int count)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&i8253_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_lock, flags);
+}
+
+void pcspkr_stop_sound(void)
+{
+        pcspkr_do_sound(0);
+}
+
+static int pcspkr_input_event(struct input_dev *dev, unsigned int type,
+                              unsigned int code, int value)
+{
+        unsigned int count = 0;
+
+        if (atomic_read(&pcsp_chip.timer_active) || !pcsp_chip.pcspkr)
+                return 0;
+
+        switch (type) {
+        case EV_SND:
+                switch (code) {
+                case SND_BELL:
+                        if (value)
+                                value = 1000;
+                case SND_TONE:
+                        break;
+                default:
+                        return -1;
+                }
+                break;
+
+        default:
+                return -1;
+        }
+
+        if (value > 20 && value < 32767)
+                count = PIT_TICK_RATE / value;
+
+        pcspkr_do_sound(count);
+
+        return 0;
+}
+
+int __devinit pcspkr_input_init(struct input_dev **rdev, struct device *dev)
+{
+        int err;
+
+        struct input_dev *input_dev = input_allocate_device();
+        if (!input_dev)
+                return -ENOMEM;
+
+        input_dev->name = "PC Speaker";
+        input_dev->phys = "isa0061/input0";
+        input_dev->id.bustype = BUS_ISA;
+        input_dev->id.vendor = 0x001f;
+        input_dev->id.product = 0x0001;
+        input_dev->id.version = 0x0100;
+        input_dev->dev.parent = dev;
+
+        input_dev->evbit[0] = BIT(EV_SND);
+        input_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
+        input_dev->event = pcspkr_input_event;
+
+        err = input_register_device(input_dev);
+        if (err) {
+                input_free_device(input_dev);
+                return err;
+        }
+
+        *rdev = input_dev;
+        return 0;
+}
+
+int pcspkr_input_remove(struct input_dev *dev)
+{
+        pcspkr_stop_sound();
+        input_unregister_device(dev);   /* this also does kfree() */
+
+        return 0;
+}