Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / sound / drivers / pcsp / pcsp_input.c

diff --git a/kernel/sound/drivers/pcsp/pcsp_input.c b/kernel/sound/drivers/pcsp/pcsp_input.c
new file mode 100644 (file)
index 0000000..bfc2581
--- /dev/null
+++ b/kernel/sound/drivers/pcsp/pcsp_input.c
@@ -0,0 +1,117 @@
+/*
+ *  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 <linux/io.h>
+#include "pcsp.h"
+#include "pcsp_input.h"
+
+static void pcspkr_do_sound(unsigned int count)
+{
+       unsigned long flags;
+
+       raw_spin_lock_irqsave(&i8253_lock, flags);
+
+       if (count) {
+               /* 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);
+               /* enable counter 2 */
+               outb_p(inb_p(0x61) | 3, 0x61);
+       } else {
+               /* disable counter 2 */
+               outb(inb_p(0x61) & 0xFC, 0x61);
+       }
+
+       raw_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 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;
+}