From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- drivers/input/misc/pcspkr.c | 97 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100644 drivers/input/misc/pcspkr.c (limited to 'drivers/input/misc/pcspkr.c') diff --git a/drivers/input/misc/pcspkr.c b/drivers/input/misc/pcspkr.c new file mode 100644 index 0000000..3013194 --- /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 +#include +#include +#include +#include +#include + +MODULE_AUTHOR("Vojtech Pavlik "); +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); -- cgit v1.1