84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
/*
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* m68k beeper driver for Linux
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*
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* Copyright (c) 2002 Richard Zidlicky
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* Copyright (c) 2002 Vojtech Pavlik
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* Copyright (c) 1992 Orest Zborowski
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*
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/input.h>
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#include <asm/machdep.h>
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#include <asm/io.h>
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MODULE_AUTHOR("Richard Zidlicky <rz@linux-m68k.org>");
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MODULE_DESCRIPTION("m68k beeper driver");
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MODULE_LICENSE("GPL");
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static struct input_dev *m68kspkr_dev;
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static int m68kspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
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{
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unsigned int count = 0;
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if (type != EV_SND)
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return -1;
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switch (code) {
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case SND_BELL: if (value) value = 1000;
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case SND_TONE: break;
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default: return -1;
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}
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if (value > 20 && value < 32767)
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count = 1193182 / value;
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mach_beep(count, -1);
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return 0;
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}
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static int __init m68kspkr_init(void)
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{
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if (!mach_beep) {
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printk(KERN_INFO "m68kspkr: no lowlevel beep support\n");
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return -ENODEV;
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}
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m68kspkr_dev = input_allocate_device();
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if (!m68kspkr_dev)
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return -ENOMEM;
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m68kspkr_dev->name = "m68k beeper";
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m68kspkr_dev->phys = "m68k/generic";
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m68kspkr_dev->id.bustype = BUS_HOST;
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m68kspkr_dev->id.vendor = 0x001f;
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m68kspkr_dev->id.product = 0x0001;
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m68kspkr_dev->id.version = 0x0100;
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m68kspkr_dev->evbit[0] = BIT(EV_SND);
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m68kspkr_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
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m68kspkr_dev->event = m68kspkr_event;
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input_register_device(m68kspkr_dev);
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return 0;
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}
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static void __exit m68kspkr_exit(void)
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{
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input_unregister_device(m68kspkr_dev);
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}
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module_init(m68kspkr_init);
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module_exit(m68kspkr_exit);
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