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