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144 lines
3.0 KiB
144 lines
3.0 KiB
// 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 <[email protected]>"); |
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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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