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/uaccess.h> 29 #include <asm/amigahw.h> 30 #include <asm/amigaints.h> 31 32 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 33 MODULE_DESCRIPTION("Amiga mouse driver"); 34 MODULE_LICENSE("GPL"); 35 36 static int amimouse_lastx, amimouse_lasty; 37 38 static irqreturn_t amimouse_interrupt(int irq, void *data) 39 { 40 struct input_dev *dev = data; 41 unsigned short joy0dat, potgor; 42 int nx, ny, dx, dy; 43 44 joy0dat = amiga_custom.joy0dat; 45 46 nx = joy0dat & 0xff; 47 ny = joy0dat >> 8; 48 49 dx = nx - amimouse_lastx; 50 dy = ny - amimouse_lasty; 51 52 if (dx < -127) dx = (256 + nx) - amimouse_lastx; 53 if (dx > 127) dx = (nx - 256) - amimouse_lastx; 54 if (dy < -127) dy = (256 + ny) - amimouse_lasty; 55 if (dy > 127) dy = (ny - 256) - amimouse_lasty; 56 57 amimouse_lastx = nx; 58 amimouse_lasty = ny; 59 60 potgor = amiga_custom.potgor; 61 62 input_report_rel(dev, REL_X, dx); 63 input_report_rel(dev, REL_Y, dy); 64 65 input_report_key(dev, BTN_LEFT, ciaa.pra & 0x40); 66 input_report_key(dev, BTN_MIDDLE, potgor & 0x0100); 67 input_report_key(dev, BTN_RIGHT, potgor & 0x0400); 68 69 input_sync(dev); 70 71 return IRQ_HANDLED; 72 } 73 74 static int amimouse_open(struct input_dev *dev) 75 { 76 unsigned short joy0dat; 77 int error; 78 79 joy0dat = amiga_custom.joy0dat; 80 81 amimouse_lastx = joy0dat & 0xff; 82 amimouse_lasty = joy0dat >> 8; 83 84 error = request_irq(IRQ_AMIGA_VERTB, amimouse_interrupt, 0, "amimouse", 85 dev); 86 if (error) 87 dev_err(&dev->dev, "Can't allocate irq %d\n", IRQ_AMIGA_VERTB); 88 89 return error; 90 } 91 92 static void amimouse_close(struct input_dev *dev) 93 { 94 free_irq(IRQ_AMIGA_VERTB, dev); 95 } 96 97 static int __init amimouse_probe(struct platform_device *pdev) 98 { 99 int err; 100 struct input_dev *dev; 101 102 dev = input_allocate_device(); 103 if (!dev) 104 return -ENOMEM; 105 106 dev->name = pdev->name; 107 dev->phys = "amimouse/input0"; 108 dev->id.bustype = BUS_AMIGA; 109 dev->id.vendor = 0x0001; 110 dev->id.product = 0x0002; 111 dev->id.version = 0x0100; 112 113 dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 114 dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 115 dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) | 116 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); 117 dev->open = amimouse_open; 118 dev->close = amimouse_close; 119 dev->dev.parent = &pdev->dev; 120 121 err = input_register_device(dev); 122 if (err) { 123 input_free_device(dev); 124 return err; 125 } 126 127 platform_set_drvdata(pdev, dev); 128 129 return 0; 130 } 131 132 static int __exit amimouse_remove(struct platform_device *pdev) 133 { 134 struct input_dev *dev = platform_get_drvdata(pdev); 135 136 platform_set_drvdata(pdev, NULL); 137 input_unregister_device(dev); 138 return 0; 139 } 140 141 static struct platform_driver amimouse_driver = { 142 .remove = __exit_p(amimouse_remove), 143 .driver = { 144 .name = "amiga-mouse", 145 .owner = THIS_MODULE, 146 }, 147 }; 148 149 module_platform_driver_probe(amimouse_driver, amimouse_probe); 150 151 MODULE_ALIAS("platform:amiga-mouse"); 152