1 /* 2 * Amiga mouse driver for Linux/m68k 3 * 4 * Copyright (c) 2000-2002 Vojtech Pavlik 5 * 6 * Based on the work of: 7 * Michael Rausch James Banks 8 * Matther Dillon David Giller 9 * Nathan Laredo Linus Torvalds 10 * Johan Myreen Jes Sorensen 11 * Russell King 12 */ 13 14 /* 15 * This program is free software; you can redistribute it and/or modify it 16 * under the terms of the GNU General Public License version 2 as published by 17 * the Free Software Foundation 18 */ 19 20 #include <linux/module.h> 21 #include <linux/init.h> 22 #include <linux/input.h> 23 #include <linux/interrupt.h> 24 #include <linux/platform_device.h> 25 26 #include <asm/irq.h> 27 #include <asm/setup.h> 28 #include <asm/system.h> 29 #include <asm/uaccess.h> 30 #include <asm/amigahw.h> 31 #include <asm/amigaints.h> 32 33 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 34 MODULE_DESCRIPTION("Amiga mouse driver"); 35 MODULE_LICENSE("GPL"); 36 37 static int amimouse_lastx, amimouse_lasty; 38 39 static irqreturn_t amimouse_interrupt(int irq, void *data) 40 { 41 struct input_dev *dev = data; 42 unsigned short joy0dat, potgor; 43 int nx, ny, dx, dy; 44 45 joy0dat = amiga_custom.joy0dat; 46 47 nx = joy0dat & 0xff; 48 ny = joy0dat >> 8; 49 50 dx = nx - amimouse_lastx; 51 dy = ny - amimouse_lasty; 52 53 if (dx < -127) dx = (256 + nx) - amimouse_lastx; 54 if (dx > 127) dx = (nx - 256) - amimouse_lastx; 55 if (dy < -127) dy = (256 + ny) - amimouse_lasty; 56 if (dy > 127) dy = (ny - 256) - amimouse_lasty; 57 58 amimouse_lastx = nx; 59 amimouse_lasty = ny; 60 61 potgor = amiga_custom.potgor; 62 63 input_report_rel(dev, REL_X, dx); 64 input_report_rel(dev, REL_Y, dy); 65 66 input_report_key(dev, BTN_LEFT, ciaa.pra & 0x40); 67 input_report_key(dev, BTN_MIDDLE, potgor & 0x0100); 68 input_report_key(dev, BTN_RIGHT, potgor & 0x0400); 69 70 input_sync(dev); 71 72 return IRQ_HANDLED; 73 } 74 75 static int amimouse_open(struct input_dev *dev) 76 { 77 unsigned short joy0dat; 78 int error; 79 80 joy0dat = amiga_custom.joy0dat; 81 82 amimouse_lastx = joy0dat & 0xff; 83 amimouse_lasty = joy0dat >> 8; 84 85 error = request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse", 86 dev); 87 if (error) 88 dev_err(&dev->dev, "Can't allocate irq %d\n", IRQ_AMIGA_VERTB); 89 90 return error; 91 } 92 93 static void amimouse_close(struct input_dev *dev) 94 { 95 free_irq(IRQ_AMIGA_VERTB, dev); 96 } 97 98 static int __init amimouse_probe(struct platform_device *pdev) 99 { 100 int err; 101 struct input_dev *dev; 102 103 dev = input_allocate_device(); 104 if (!dev) 105 return -ENOMEM; 106 107 dev->name = pdev->name; 108 dev->phys = "amimouse/input0"; 109 dev->id.bustype = BUS_AMIGA; 110 dev->id.vendor = 0x0001; 111 dev->id.product = 0x0002; 112 dev->id.version = 0x0100; 113 114 dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 115 dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 116 dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) | 117 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); 118 dev->open = amimouse_open; 119 dev->close = amimouse_close; 120 dev->dev.parent = &pdev->dev; 121 122 err = input_register_device(dev); 123 if (err) { 124 input_free_device(dev); 125 return err; 126 } 127 128 platform_set_drvdata(pdev, dev); 129 130 return 0; 131 } 132 133 static int __exit amimouse_remove(struct platform_device *pdev) 134 { 135 struct input_dev *dev = platform_get_drvdata(pdev); 136 137 platform_set_drvdata(pdev, NULL); 138 input_unregister_device(dev); 139 return 0; 140 } 141 142 static struct platform_driver amimouse_driver = { 143 .probe = amimouse_probe, 144 .remove = __exit_p(amimouse_remove), 145 .driver = { 146 .name = "amiga-mouse", 147 .owner = THIS_MODULE, 148 }, 149 }; 150 module_platform_driver(amimouse_driver); 151 152 MODULE_ALIAS("platform:amiga-mouse"); 153