1/* 2 * PC Speaker beeper driver for Linux 3 * 4 * Copyright (c) 2002 Vojtech Pavlik 5 * Copyright (c) 1992 Orest Zborowski 6 * 7 */ 8 9/* 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License version 2 as published by 12 * the Free Software Foundation 13 */ 14 15#include <linux/kernel.h> 16#include <linux/module.h> 17#include <linux/init.h> 18#include <linux/input.h> 19#include <linux/platform_device.h> 20#include <linux/timex.h> 21#include <asm/io.h> 22 23MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 24MODULE_DESCRIPTION("PC Speaker beeper driver"); 25MODULE_LICENSE("GPL"); 26MODULE_ALIAS("platform:pcspkr"); 27 28#if defined(CONFIG_MIPS) || defined(CONFIG_X86) 29/* Use the global PIT lock ! */ 30#include <asm/i8253.h> 31#else 32#include <asm/8253pit.h> 33static DEFINE_RAW_SPINLOCK(i8253_lock); 34#endif 35 36static int pcspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) 37{ 38 unsigned int count = 0; 39 unsigned long flags; 40 41 if (type != EV_SND) 42 return -1; 43 44 switch (code) { 45 case SND_BELL: if (value) value = 1000; 46 case SND_TONE: break; 47 default: return -1; 48 } 49 50 if (value > 20 && value < 32767) 51 count = PIT_TICK_RATE / value; 52 53 raw_spin_lock_irqsave(&i8253_lock, flags); 54 55 if (count) { 56 /* set command for counter 2, 2 byte write */ 57 outb_p(0xB6, 0x43); 58 /* select desired HZ */ 59 outb_p(count & 0xff, 0x42); 60 outb((count >> 8) & 0xff, 0x42); 61 /* enable counter 2 */ 62 outb_p(inb_p(0x61) | 3, 0x61); 63 } else { 64 /* disable counter 2 */ 65 outb(inb_p(0x61) & 0xFC, 0x61); 66 } 67 68 raw_spin_unlock_irqrestore(&i8253_lock, flags); 69 70 return 0; 71} 72 73static int __devinit pcspkr_probe(struct platform_device *dev) 74{ 75 struct input_dev *pcspkr_dev; 76 int err; 77 78 pcspkr_dev = input_allocate_device(); 79 if (!pcspkr_dev) 80 return -ENOMEM; 81 82 pcspkr_dev->name = "PC Speaker"; 83 pcspkr_dev->phys = "isa0061/input0"; 84 pcspkr_dev->id.bustype = BUS_ISA; 85 pcspkr_dev->id.vendor = 0x001f; 86 pcspkr_dev->id.product = 0x0001; 87 pcspkr_dev->id.version = 0x0100; 88 pcspkr_dev->dev.parent = &dev->dev; 89 90 pcspkr_dev->evbit[0] = BIT_MASK(EV_SND); 91 pcspkr_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE); 92 pcspkr_dev->event = pcspkr_event; 93 94 err = input_register_device(pcspkr_dev); 95 if (err) { 96 input_free_device(pcspkr_dev); 97 return err; 98 } 99 100 platform_set_drvdata(dev, pcspkr_dev); 101 102 return 0; 103} 104 105static int __devexit pcspkr_remove(struct platform_device *dev) 106{ 107 struct input_dev *pcspkr_dev = platform_get_drvdata(dev); 108 109 input_unregister_device(pcspkr_dev); 110 platform_set_drvdata(dev, NULL); 111 /* turn off the speaker */ 112 pcspkr_event(NULL, EV_SND, SND_BELL, 0); 113 114 return 0; 115} 116 117static int pcspkr_suspend(struct device *dev) 118{ 119 pcspkr_event(NULL, EV_SND, SND_BELL, 0); 120 121 return 0; 122} 123 124static void pcspkr_shutdown(struct platform_device *dev) 125{ 126 /* turn off the speaker */ 127 pcspkr_event(NULL, EV_SND, SND_BELL, 0); 128} 129 130static const struct dev_pm_ops pcspkr_pm_ops = { 131 .suspend = pcspkr_suspend, 132}; 133 134static struct platform_driver pcspkr_platform_driver = { 135 .driver = { 136 .name = "pcspkr", 137 .owner = THIS_MODULE, 138 .pm = &pcspkr_pm_ops, 139 }, 140 .probe = pcspkr_probe, 141 .remove = __devexit_p(pcspkr_remove), 142 .shutdown = pcspkr_shutdown, 143}; 144 145 146static int __init pcspkr_init(void) 147{ 148 return platform_driver_register(&pcspkr_platform_driver); 149} 150 151static void __exit pcspkr_exit(void) 152{ 153 platform_driver_unregister(&pcspkr_platform_driver); 154} 155 156module_init(pcspkr_init); 157module_exit(pcspkr_exit); 158