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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 | /* * $Id: pc110pad.c,v 1.12 2001/09/25 10:12:07 vojtech Exp $ * * Copyright (c) 2000-2001 Vojtech Pavlik * * Based on the work of: * Alan Cox Robin O'Leary */ /* * IBM PC110 touchpad driver for Linux */ /* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Should you need to contact me, the author, you can do so either by * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/ioport.h> #include <linux/input.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/pci.h> #include <asm/io.h> #include <asm/irq.h> MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); MODULE_DESCRIPTION("IBM PC110 touchpad driver"); MODULE_LICENSE("GPL"); #define PC110PAD_OFF 0x30 #define PC110PAD_ON 0x38 static int pc110pad_irq = 10; static int pc110pad_io = 0x15e0; static struct input_dev *pc110pad_dev; static int pc110pad_data[3]; static int pc110pad_count; static irqreturn_t pc110pad_interrupt(int irq, void *ptr) { int value = inb_p(pc110pad_io); int handshake = inb_p(pc110pad_io + 2); outb_p(handshake | 1, pc110pad_io + 2); outb_p(handshake & ~1, pc110pad_io + 2); inb_p(0x64); pc110pad_data[pc110pad_count++] = value; if (pc110pad_count < 3) return IRQ_HANDLED; input_report_key(pc110pad_dev, BTN_TOUCH, pc110pad_data[0] & 0x01); input_report_abs(pc110pad_dev, ABS_X, pc110pad_data[1] | ((pc110pad_data[0] << 3) & 0x80) | ((pc110pad_data[0] << 1) & 0x100)); input_report_abs(pc110pad_dev, ABS_Y, pc110pad_data[2] | ((pc110pad_data[0] << 4) & 0x80)); input_sync(pc110pad_dev); pc110pad_count = 0; return IRQ_HANDLED; } static void pc110pad_close(struct input_dev *dev) { outb(PC110PAD_OFF, pc110pad_io + 2); } static int pc110pad_open(struct input_dev *dev) { pc110pad_interrupt(0, NULL); pc110pad_interrupt(0, NULL); pc110pad_interrupt(0, NULL); outb(PC110PAD_ON, pc110pad_io + 2); pc110pad_count = 0; return 0; } /* * We try to avoid enabling the hardware if it's not * there, but we don't know how to test. But we do know * that the PC110 is not a PCI system. So if we find any * PCI devices in the machine, we don't have a PC110. */ static int __init pc110pad_init(void) { struct pci_dev *dev; int err; dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL); if (dev) { pci_dev_put(dev); return -ENODEV; } if (!request_region(pc110pad_io, 4, "pc110pad")) { printk(KERN_ERR "pc110pad: I/O area %#x-%#x in use.\n", pc110pad_io, pc110pad_io + 4); return -EBUSY; } outb(PC110PAD_OFF, pc110pad_io + 2); if (request_irq(pc110pad_irq, pc110pad_interrupt, 0, "pc110pad", NULL)) { printk(KERN_ERR "pc110pad: Unable to get irq %d.\n", pc110pad_irq); err = -EBUSY; goto err_release_region; } pc110pad_dev = input_allocate_device(); if (!pc110pad_dev) { printk(KERN_ERR "pc110pad: Not enough memory.\n"); err = -ENOMEM; goto err_free_irq; } pc110pad_dev->name = "IBM PC110 TouchPad"; pc110pad_dev->phys = "isa15e0/input0"; pc110pad_dev->id.bustype = BUS_ISA; pc110pad_dev->id.vendor = 0x0003; pc110pad_dev->id.product = 0x0001; pc110pad_dev->id.version = 0x0100; pc110pad_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); pc110pad_dev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y); pc110pad_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH); pc110pad_dev->absmax[ABS_X] = 0x1ff; pc110pad_dev->absmax[ABS_Y] = 0x0ff; pc110pad_dev->open = pc110pad_open; pc110pad_dev->close = pc110pad_close; err = input_register_device(pc110pad_dev); if (err) goto err_free_dev; return 0; err_free_dev: input_free_device(pc110pad_dev); err_free_irq: free_irq(pc110pad_irq, NULL); err_release_region: release_region(pc110pad_io, 4); return err; } static void __exit pc110pad_exit(void) { outb(PC110PAD_OFF, pc110pad_io + 2); free_irq(pc110pad_irq, NULL); input_unregister_device(pc110pad_dev); release_region(pc110pad_io, 4); } module_init(pc110pad_init); module_exit(pc110pad_exit); |