Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / input / misc / pcspkr.c

diff --git a/kernel/drivers/input/misc/pcspkr.c b/kernel/drivers/input/misc/pcspkr.c
new file mode 100644 (file)
index 0000000..72b1fc3
--- /dev/null
+++ b/kernel/drivers/input/misc/pcspkr.c
@@ -0,0 +1,135 @@
+/*
+ *  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/i8253.h>
+#include <linux/input.h>
+#include <linux/platform_device.h>
+#include <linux/timex.h>
+#include <asm/io.h>
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_DESCRIPTION("PC Speaker beeper driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pcspkr");
+
+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;
+
+       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);
+
+       return 0;
+}
+
+static int pcspkr_probe(struct platform_device *dev)
+{
+       struct input_dev *pcspkr_dev;
+       int err;
+
+       pcspkr_dev = input_allocate_device();
+       if (!pcspkr_dev)
+               return -ENOMEM;
+
+       pcspkr_dev->name = "PC Speaker";
+       pcspkr_dev->phys = "isa0061/input0";
+       pcspkr_dev->id.bustype = BUS_ISA;
+       pcspkr_dev->id.vendor = 0x001f;
+       pcspkr_dev->id.product = 0x0001;
+       pcspkr_dev->id.version = 0x0100;
+       pcspkr_dev->dev.parent = &dev->dev;
+
+       pcspkr_dev->evbit[0] = BIT_MASK(EV_SND);
+       pcspkr_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
+       pcspkr_dev->event = pcspkr_event;
+
+       err = input_register_device(pcspkr_dev);
+       if (err) {
+               input_free_device(pcspkr_dev);
+               return err;
+       }
+
+       platform_set_drvdata(dev, pcspkr_dev);
+
+       return 0;
+}
+
+static int pcspkr_remove(struct platform_device *dev)
+{
+       struct input_dev *pcspkr_dev = platform_get_drvdata(dev);
+
+       input_unregister_device(pcspkr_dev);
+       /* turn off the speaker */
+       pcspkr_event(NULL, EV_SND, SND_BELL, 0);
+
+       return 0;
+}
+
+static int pcspkr_suspend(struct device *dev)
+{
+       pcspkr_event(NULL, EV_SND, SND_BELL, 0);
+
+       return 0;
+}
+
+static void pcspkr_shutdown(struct platform_device *dev)
+{
+       /* turn off the speaker */
+       pcspkr_event(NULL, EV_SND, SND_BELL, 0);
+}
+
+static const struct dev_pm_ops pcspkr_pm_ops = {
+       .suspend = pcspkr_suspend,
+};
+
+static struct platform_driver pcspkr_platform_driver = {
+       .driver         = {
+               .name   = "pcspkr",
+               .pm     = &pcspkr_pm_ops,
+       },
+       .probe          = pcspkr_probe,
+       .remove         = pcspkr_remove,
+       .shutdown       = pcspkr_shutdown,
+};
+module_platform_driver(pcspkr_platform_driver);
+