1 /* 2 * m68k beeper driver for Linux 3 * 4 * Copyright (c) 2002 Richard Zidlicky 5 * Copyright (c) 2002 Vojtech Pavlik 6 * Copyright (c) 1992 Orest Zborowski 7 * 8 */ 9 10 /* 11 * This program is free software; you can redistribute it and/or modify it 12 * under the terms of the GNU General Public License version 2 as published by 13 * the Free Software Foundation 14 */ 15 16 #include <linux/kernel.h> 17 #include <linux/module.h> 18 #include <linux/init.h> 19 #include <linux/input.h> 20 #include <linux/platform_device.h> 21 #include <asm/machdep.h> 22 #include <asm/io.h> 23 24 MODULE_AUTHOR("Richard Zidlicky <rz@linux-m68k.org>"); 25 MODULE_DESCRIPTION("m68k beeper driver"); 26 MODULE_LICENSE("GPL"); 27 28 static struct platform_device *m68kspkr_platform_device; 29 30 static int m68kspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) 31 { 32 unsigned int count = 0; 33 34 if (type != EV_SND) 35 return -1; 36 37 switch (code) { 38 case SND_BELL: if (value) value = 1000; 39 case SND_TONE: break; 40 default: return -1; 41 } 42 43 if (value > 20 && value < 32767) 44 count = 1193182 / value; 45 46 mach_beep(count, -1); 47 48 return 0; 49 } 50 51 static int m68kspkr_probe(struct platform_device *dev) 52 { 53 struct input_dev *input_dev; 54 int err; 55 56 input_dev = input_allocate_device(); 57 if (!input_dev) 58 return -ENOMEM; 59 60 input_dev->name = "m68k beeper"; 61 input_dev->phys = "m68k/generic"; 62 input_dev->id.bustype = BUS_HOST; 63 input_dev->id.vendor = 0x001f; 64 input_dev->id.product = 0x0001; 65 input_dev->id.version = 0x0100; 66 input_dev->dev.parent = &dev->dev; 67 68 input_dev->evbit[0] = BIT_MASK(EV_SND); 69 input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE); 70 input_dev->event = m68kspkr_event; 71 72 err = input_register_device(input_dev); 73 if (err) { 74 input_free_device(input_dev); 75 return err; 76 } 77 78 platform_set_drvdata(dev, input_dev); 79 80 return 0; 81 } 82 83 static int m68kspkr_remove(struct platform_device *dev) 84 { 85 struct input_dev *input_dev = platform_get_drvdata(dev); 86 87 input_unregister_device(input_dev); 88 /* turn off the speaker */ 89 m68kspkr_event(NULL, EV_SND, SND_BELL, 0); 90 91 return 0; 92 } 93 94 static void m68kspkr_shutdown(struct platform_device *dev) 95 { 96 /* turn off the speaker */ 97 m68kspkr_event(NULL, EV_SND, SND_BELL, 0); 98 } 99 100 static struct platform_driver m68kspkr_platform_driver = { 101 .driver = { 102 .name = "m68kspkr", 103 }, 104 .probe = m68kspkr_probe, 105 .remove = m68kspkr_remove, 106 .shutdown = m68kspkr_shutdown, 107 }; 108 109 static int __init m68kspkr_init(void) 110 { 111 int err; 112 113 if (!mach_beep) { 114 printk(KERN_INFO "m68kspkr: no lowlevel beep support\n"); 115 return -ENODEV; 116 } 117 118 err = platform_driver_register(&m68kspkr_platform_driver); 119 if (err) 120 return err; 121 122 m68kspkr_platform_device = platform_device_alloc("m68kspkr", -1); 123 if (!m68kspkr_platform_device) { 124 err = -ENOMEM; 125 goto err_unregister_driver; 126 } 127 128 err = platform_device_add(m68kspkr_platform_device); 129 if (err) 130 goto err_free_device; 131 132 return 0; 133 134 err_free_device: 135 platform_device_put(m68kspkr_platform_device); 136 err_unregister_driver: 137 platform_driver_unregister(&m68kspkr_platform_driver); 138 139 return err; 140 } 141 142 static void __exit m68kspkr_exit(void) 143 { 144 platform_device_unregister(m68kspkr_platform_device); 145 platform_driver_unregister(&m68kspkr_platform_driver); 146 } 147 148 module_init(m68kspkr_init); 149 module_exit(m68kspkr_exit); 150