11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * $Id: pc110pad.c,v 1.12 2001/09/25 10:12:07 vojtech Exp $ 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (c) 2000-2001 Vojtech Pavlik 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Based on the work of: 71da177e4SLinus Torvalds * Alan Cox Robin O'Leary 81da177e4SLinus Torvalds */ 91da177e4SLinus Torvalds 101da177e4SLinus Torvalds /* 111da177e4SLinus Torvalds * IBM PC110 touchpad driver for Linux 121da177e4SLinus Torvalds */ 131da177e4SLinus Torvalds 141da177e4SLinus Torvalds /* 151da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 161da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 171da177e4SLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 181da177e4SLinus Torvalds * (at your option) any later version. 191da177e4SLinus Torvalds * 201da177e4SLinus Torvalds * This program is distributed in the hope that it will be useful, 211da177e4SLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 221da177e4SLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 231da177e4SLinus Torvalds * GNU General Public License for more details. 241da177e4SLinus Torvalds * 251da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 261da177e4SLinus Torvalds * along with this program; if not, write to the Free Software 271da177e4SLinus Torvalds * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 281da177e4SLinus Torvalds * 291da177e4SLinus Torvalds * Should you need to contact me, the author, you can do so either by 301da177e4SLinus Torvalds * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 311da177e4SLinus Torvalds * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 321da177e4SLinus Torvalds */ 331da177e4SLinus Torvalds 341da177e4SLinus Torvalds #include <linux/module.h> 351da177e4SLinus Torvalds #include <linux/kernel.h> 361da177e4SLinus Torvalds #include <linux/errno.h> 371da177e4SLinus Torvalds #include <linux/ioport.h> 381da177e4SLinus Torvalds #include <linux/input.h> 391da177e4SLinus Torvalds #include <linux/init.h> 401da177e4SLinus Torvalds #include <linux/interrupt.h> 411da177e4SLinus Torvalds #include <linux/pci.h> 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds #include <asm/io.h> 441da177e4SLinus Torvalds #include <asm/irq.h> 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 471da177e4SLinus Torvalds MODULE_DESCRIPTION("IBM PC110 touchpad driver"); 481da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds #define PC110PAD_OFF 0x30 511da177e4SLinus Torvalds #define PC110PAD_ON 0x38 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds static int pc110pad_irq = 10; 541da177e4SLinus Torvalds static int pc110pad_io = 0x15e0; 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds static struct input_dev pc110pad_dev; 571da177e4SLinus Torvalds static int pc110pad_data[3]; 581da177e4SLinus Torvalds static int pc110pad_count; 591da177e4SLinus Torvalds static int pc110pad_used; 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds static char *pc110pad_name = "IBM PC110 TouchPad"; 621da177e4SLinus Torvalds static char *pc110pad_phys = "isa15e0/input0"; 631da177e4SLinus Torvalds 641da177e4SLinus Torvalds static irqreturn_t pc110pad_interrupt(int irq, void *ptr, struct pt_regs *regs) 651da177e4SLinus Torvalds { 661da177e4SLinus Torvalds int value = inb_p(pc110pad_io); 671da177e4SLinus Torvalds int handshake = inb_p(pc110pad_io + 2); 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds outb_p(handshake | 1, pc110pad_io + 2); 701da177e4SLinus Torvalds outb_p(handshake & ~1, pc110pad_io + 2); 711da177e4SLinus Torvalds inb_p(0x64); 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds pc110pad_data[pc110pad_count++] = value; 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds if (pc110pad_count < 3) 761da177e4SLinus Torvalds return IRQ_HANDLED; 771da177e4SLinus Torvalds 781da177e4SLinus Torvalds input_regs(&pc110pad_dev, regs); 791da177e4SLinus Torvalds input_report_key(&pc110pad_dev, BTN_TOUCH, 801da177e4SLinus Torvalds pc110pad_data[0] & 0x01); 811da177e4SLinus Torvalds input_report_abs(&pc110pad_dev, ABS_X, 821da177e4SLinus Torvalds pc110pad_data[1] | ((pc110pad_data[0] << 3) & 0x80) | ((pc110pad_data[0] << 1) & 0x100)); 831da177e4SLinus Torvalds input_report_abs(&pc110pad_dev, ABS_Y, 841da177e4SLinus Torvalds pc110pad_data[2] | ((pc110pad_data[0] << 4) & 0x80)); 851da177e4SLinus Torvalds input_sync(&pc110pad_dev); 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds pc110pad_count = 0; 881da177e4SLinus Torvalds return IRQ_HANDLED; 891da177e4SLinus Torvalds } 901da177e4SLinus Torvalds 911da177e4SLinus Torvalds static void pc110pad_close(struct input_dev *dev) 921da177e4SLinus Torvalds { 931da177e4SLinus Torvalds if (!--pc110pad_used) 941da177e4SLinus Torvalds outb(PC110PAD_OFF, pc110pad_io + 2); 951da177e4SLinus Torvalds } 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds static int pc110pad_open(struct input_dev *dev) 981da177e4SLinus Torvalds { 991da177e4SLinus Torvalds if (pc110pad_used++) 1001da177e4SLinus Torvalds return 0; 1011da177e4SLinus Torvalds 1021da177e4SLinus Torvalds pc110pad_interrupt(0,NULL,NULL); 1031da177e4SLinus Torvalds pc110pad_interrupt(0,NULL,NULL); 1041da177e4SLinus Torvalds pc110pad_interrupt(0,NULL,NULL); 1051da177e4SLinus Torvalds outb(PC110PAD_ON, pc110pad_io + 2); 1061da177e4SLinus Torvalds pc110pad_count = 0; 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds return 0; 1091da177e4SLinus Torvalds } 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds /* 1121da177e4SLinus Torvalds * We try to avoid enabling the hardware if it's not 1131da177e4SLinus Torvalds * there, but we don't know how to test. But we do know 1141da177e4SLinus Torvalds * that the PC110 is not a PCI system. So if we find any 1151da177e4SLinus Torvalds * PCI devices in the machine, we don't have a PC110. 1161da177e4SLinus Torvalds */ 1171da177e4SLinus Torvalds static int __init pc110pad_init(void) 1181da177e4SLinus Torvalds { 1191da177e4SLinus Torvalds struct pci_dev *dev; 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL); 1221da177e4SLinus Torvalds if (dev) { 1231da177e4SLinus Torvalds pci_dev_put(dev); 1241da177e4SLinus Torvalds return -ENOENT; 1251da177e4SLinus Torvalds } 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds if (!request_region(pc110pad_io, 4, "pc110pad")) { 1281da177e4SLinus Torvalds printk(KERN_ERR "pc110pad: I/O area %#x-%#x in use.\n", 1291da177e4SLinus Torvalds pc110pad_io, pc110pad_io + 4); 1301da177e4SLinus Torvalds return -EBUSY; 1311da177e4SLinus Torvalds } 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds outb(PC110PAD_OFF, pc110pad_io + 2); 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds if (request_irq(pc110pad_irq, pc110pad_interrupt, 0, "pc110pad", NULL)) 1361da177e4SLinus Torvalds { 1371da177e4SLinus Torvalds release_region(pc110pad_io, 4); 1381da177e4SLinus Torvalds printk(KERN_ERR "pc110pad: Unable to get irq %d.\n", pc110pad_irq); 1391da177e4SLinus Torvalds return -EBUSY; 1401da177e4SLinus Torvalds } 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds pc110pad_dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); 1431da177e4SLinus Torvalds pc110pad_dev.absbit[0] = BIT(ABS_X) | BIT(ABS_Y); 1441da177e4SLinus Torvalds pc110pad_dev.keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH); 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds pc110pad_dev.absmax[ABS_X] = 0x1ff; 1471da177e4SLinus Torvalds pc110pad_dev.absmax[ABS_Y] = 0x0ff; 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds pc110pad_dev.open = pc110pad_open; 1501da177e4SLinus Torvalds pc110pad_dev.close = pc110pad_close; 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds pc110pad_dev.name = pc110pad_name; 1531da177e4SLinus Torvalds pc110pad_dev.phys = pc110pad_phys; 1541da177e4SLinus Torvalds pc110pad_dev.id.bustype = BUS_ISA; 1551da177e4SLinus Torvalds pc110pad_dev.id.vendor = 0x0003; 1561da177e4SLinus Torvalds pc110pad_dev.id.product = 0x0001; 1571da177e4SLinus Torvalds pc110pad_dev.id.version = 0x0100; 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds input_register_device(&pc110pad_dev); 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds printk(KERN_INFO "input: %s at %#x irq %d\n", 1621da177e4SLinus Torvalds pc110pad_name, pc110pad_io, pc110pad_irq); 1631da177e4SLinus Torvalds 1641da177e4SLinus Torvalds return 0; 1651da177e4SLinus Torvalds } 1661da177e4SLinus Torvalds 1671da177e4SLinus Torvalds static void __exit pc110pad_exit(void) 1681da177e4SLinus Torvalds { 1691da177e4SLinus Torvalds input_unregister_device(&pc110pad_dev); 1701da177e4SLinus Torvalds 1711da177e4SLinus Torvalds outb(PC110PAD_OFF, pc110pad_io + 2); 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds free_irq(pc110pad_irq, NULL); 1741da177e4SLinus Torvalds release_region(pc110pad_io, 4); 1751da177e4SLinus Torvalds } 1761da177e4SLinus Torvalds 1771da177e4SLinus Torvalds module_init(pc110pad_init); 1781da177e4SLinus Torvalds module_exit(pc110pad_exit); 179