mirror of https://gitee.com/openkylin/linux.git
145 lines
3.0 KiB
C
145 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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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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#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 <linux/platform_device.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 platform_device *m68kspkr_platform_device;
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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 m68kspkr_probe(struct platform_device *dev)
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{
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struct input_dev *input_dev;
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int err;
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input_dev = input_allocate_device();
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if (!input_dev)
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return -ENOMEM;
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input_dev->name = "m68k beeper";
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input_dev->phys = "m68k/generic";
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input_dev->id.bustype = BUS_HOST;
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input_dev->id.vendor = 0x001f;
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input_dev->id.product = 0x0001;
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input_dev->id.version = 0x0100;
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input_dev->dev.parent = &dev->dev;
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input_dev->evbit[0] = BIT_MASK(EV_SND);
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input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
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input_dev->event = m68kspkr_event;
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err = input_register_device(input_dev);
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if (err) {
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input_free_device(input_dev);
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return err;
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}
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platform_set_drvdata(dev, input_dev);
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return 0;
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}
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static int m68kspkr_remove(struct platform_device *dev)
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{
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struct input_dev *input_dev = platform_get_drvdata(dev);
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input_unregister_device(input_dev);
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/* turn off the speaker */
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m68kspkr_event(NULL, EV_SND, SND_BELL, 0);
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return 0;
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}
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static void m68kspkr_shutdown(struct platform_device *dev)
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{
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/* turn off the speaker */
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m68kspkr_event(NULL, EV_SND, SND_BELL, 0);
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}
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static struct platform_driver m68kspkr_platform_driver = {
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.driver = {
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.name = "m68kspkr",
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},
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.probe = m68kspkr_probe,
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.remove = m68kspkr_remove,
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.shutdown = m68kspkr_shutdown,
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};
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static int __init m68kspkr_init(void)
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{
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int err;
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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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err = platform_driver_register(&m68kspkr_platform_driver);
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if (err)
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return err;
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m68kspkr_platform_device = platform_device_alloc("m68kspkr", -1);
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if (!m68kspkr_platform_device) {
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err = -ENOMEM;
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goto err_unregister_driver;
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}
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err = platform_device_add(m68kspkr_platform_device);
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if (err)
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goto err_free_device;
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return 0;
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err_free_device:
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platform_device_put(m68kspkr_platform_device);
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err_unregister_driver:
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platform_driver_unregister(&m68kspkr_platform_driver);
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return err;
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}
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static void __exit m68kspkr_exit(void)
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{
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platform_device_unregister(m68kspkr_platform_device);
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platform_driver_unregister(&m68kspkr_platform_driver);
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}
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module_init(m68kspkr_init);
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module_exit(m68kspkr_exit);
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