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 <asm/machdep.h> 21 #include <asm/io.h> 22 23 MODULE_AUTHOR("Richard Zidlicky <rz@linux-m68k.org>"); 24 MODULE_DESCRIPTION("m68k beeper driver"); 25 MODULE_LICENSE("GPL"); 26 27 static struct input_dev *m68kspkr_dev; 28 29 static int m68kspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) 30 { 31 unsigned int count = 0; 32 33 if (type != EV_SND) 34 return -1; 35 36 switch (code) { 37 case SND_BELL: if (value) value = 1000; 38 case SND_TONE: break; 39 default: return -1; 40 } 41 42 if (value > 20 && value < 32767) 43 count = 1193182 / value; 44 45 mach_beep(count, -1); 46 47 return 0; 48 } 49 50 static int __init m68kspkr_init(void) 51 { 52 if (!mach_beep) { 53 printk(KERN_INFO "m68kspkr: no lowlevel beep support\n"); 54 return -ENODEV; 55 } 56 57 m68kspkr_dev = input_allocate_device(); 58 if (!m68kspkr_dev) 59 return -ENOMEM; 60 61 m68kspkr_dev->name = "m68k beeper"; 62 m68kspkr_dev->phys = "m68k/generic"; 63 m68kspkr_dev->id.bustype = BUS_HOST; 64 m68kspkr_dev->id.vendor = 0x001f; 65 m68kspkr_dev->id.product = 0x0001; 66 m68kspkr_dev->id.version = 0x0100; 67 68 m68kspkr_dev->evbit[0] = BIT(EV_SND); 69 m68kspkr_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE); 70 m68kspkr_dev->event = m68kspkr_event; 71 72 input_register_device(m68kspkr_dev); 73 74 return 0; 75 } 76 77 static void __exit m68kspkr_exit(void) 78 { 79 input_unregister_device(m68kspkr_dev); 80 } 81 82 module_init(m68kspkr_init); 83 module_exit(m68kspkr_exit); 84