11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Copyright (c) 2000-2001 Vojtech Pavlik 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Based on the work of: 51da177e4SLinus Torvalds * Alan Cox Robin O'Leary 61da177e4SLinus Torvalds */ 71da177e4SLinus Torvalds 81da177e4SLinus Torvalds /* 91da177e4SLinus Torvalds * IBM PC110 touchpad driver for Linux 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds /* 131da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 141da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 151da177e4SLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 161da177e4SLinus Torvalds * (at your option) any later version. 171da177e4SLinus Torvalds * 181da177e4SLinus Torvalds * This program is distributed in the hope that it will be useful, 191da177e4SLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 201da177e4SLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 211da177e4SLinus Torvalds * GNU General Public License for more details. 221da177e4SLinus Torvalds * 231da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 241da177e4SLinus Torvalds * along with this program; if not, write to the Free Software 251da177e4SLinus Torvalds * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 261da177e4SLinus Torvalds * 271da177e4SLinus Torvalds * Should you need to contact me, the author, you can do so either by 281da177e4SLinus Torvalds * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 291da177e4SLinus Torvalds * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 301da177e4SLinus Torvalds */ 311da177e4SLinus Torvalds 321da177e4SLinus Torvalds #include <linux/module.h> 331da177e4SLinus Torvalds #include <linux/kernel.h> 341da177e4SLinus Torvalds #include <linux/errno.h> 351da177e4SLinus Torvalds #include <linux/ioport.h> 361da177e4SLinus Torvalds #include <linux/input.h> 371da177e4SLinus Torvalds #include <linux/init.h> 381da177e4SLinus Torvalds #include <linux/interrupt.h> 391da177e4SLinus Torvalds #include <linux/pci.h> 4041e191e8SIngo Molnar #include <linux/delay.h> 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds #include <asm/io.h> 431da177e4SLinus Torvalds #include <asm/irq.h> 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 461da177e4SLinus Torvalds MODULE_DESCRIPTION("IBM PC110 touchpad driver"); 471da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds #define PC110PAD_OFF 0x30 501da177e4SLinus Torvalds #define PC110PAD_ON 0x38 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds static int pc110pad_irq = 10; 531da177e4SLinus Torvalds static int pc110pad_io = 0x15e0; 541da177e4SLinus Torvalds 552e5b636bSDmitry Torokhov static struct input_dev *pc110pad_dev; 561da177e4SLinus Torvalds static int pc110pad_data[3]; 571da177e4SLinus Torvalds static int pc110pad_count; 581da177e4SLinus Torvalds 597d12e780SDavid Howells static irqreturn_t pc110pad_interrupt(int irq, void *ptr) 601da177e4SLinus Torvalds { 611da177e4SLinus Torvalds int value = inb_p(pc110pad_io); 621da177e4SLinus Torvalds int handshake = inb_p(pc110pad_io + 2); 631da177e4SLinus Torvalds 6441e191e8SIngo Molnar outb(handshake | 1, pc110pad_io + 2); 6541e191e8SIngo Molnar udelay(2); 6641e191e8SIngo Molnar outb(handshake & ~1, pc110pad_io + 2); 6741e191e8SIngo Molnar udelay(2); 681da177e4SLinus Torvalds inb_p(0x64); 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds pc110pad_data[pc110pad_count++] = value; 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds if (pc110pad_count < 3) 731da177e4SLinus Torvalds return IRQ_HANDLED; 741da177e4SLinus Torvalds 752e5b636bSDmitry Torokhov input_report_key(pc110pad_dev, BTN_TOUCH, 761da177e4SLinus Torvalds pc110pad_data[0] & 0x01); 772e5b636bSDmitry Torokhov input_report_abs(pc110pad_dev, ABS_X, 781da177e4SLinus Torvalds pc110pad_data[1] | ((pc110pad_data[0] << 3) & 0x80) | ((pc110pad_data[0] << 1) & 0x100)); 792e5b636bSDmitry Torokhov input_report_abs(pc110pad_dev, ABS_Y, 801da177e4SLinus Torvalds pc110pad_data[2] | ((pc110pad_data[0] << 4) & 0x80)); 812e5b636bSDmitry Torokhov input_sync(pc110pad_dev); 821da177e4SLinus Torvalds 831da177e4SLinus Torvalds pc110pad_count = 0; 841da177e4SLinus Torvalds return IRQ_HANDLED; 851da177e4SLinus Torvalds } 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds static void pc110pad_close(struct input_dev *dev) 881da177e4SLinus Torvalds { 891da177e4SLinus Torvalds outb(PC110PAD_OFF, pc110pad_io + 2); 901da177e4SLinus Torvalds } 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds static int pc110pad_open(struct input_dev *dev) 931da177e4SLinus Torvalds { 947d12e780SDavid Howells pc110pad_interrupt(0, NULL); 957d12e780SDavid Howells pc110pad_interrupt(0, NULL); 967d12e780SDavid Howells pc110pad_interrupt(0, NULL); 971da177e4SLinus Torvalds outb(PC110PAD_ON, pc110pad_io + 2); 981da177e4SLinus Torvalds pc110pad_count = 0; 991da177e4SLinus Torvalds 1001da177e4SLinus Torvalds return 0; 1011da177e4SLinus Torvalds } 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds /* 1041da177e4SLinus Torvalds * We try to avoid enabling the hardware if it's not 1051da177e4SLinus Torvalds * there, but we don't know how to test. But we do know 1061da177e4SLinus Torvalds * that the PC110 is not a PCI system. So if we find any 1071da177e4SLinus Torvalds * PCI devices in the machine, we don't have a PC110. 1081da177e4SLinus Torvalds */ 1091da177e4SLinus Torvalds static int __init pc110pad_init(void) 1101da177e4SLinus Torvalds { 11172155615SDmitry Torokhov int err; 1121da177e4SLinus Torvalds 113b0ee0d3eSRoel Kluin if (!no_pci_devices()) 11465a2d225SAkinobu Mita return -ENODEV; 1151da177e4SLinus Torvalds 1161da177e4SLinus Torvalds if (!request_region(pc110pad_io, 4, "pc110pad")) { 1171da177e4SLinus Torvalds printk(KERN_ERR "pc110pad: I/O area %#x-%#x in use.\n", 1181da177e4SLinus Torvalds pc110pad_io, pc110pad_io + 4); 1191da177e4SLinus Torvalds return -EBUSY; 1201da177e4SLinus Torvalds } 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds outb(PC110PAD_OFF, pc110pad_io + 2); 1231da177e4SLinus Torvalds 1242e5b636bSDmitry Torokhov if (request_irq(pc110pad_irq, pc110pad_interrupt, 0, "pc110pad", NULL)) { 1251da177e4SLinus Torvalds printk(KERN_ERR "pc110pad: Unable to get irq %d.\n", pc110pad_irq); 12672155615SDmitry Torokhov err = -EBUSY; 12772155615SDmitry Torokhov goto err_release_region; 1281da177e4SLinus Torvalds } 1291da177e4SLinus Torvalds 13072155615SDmitry Torokhov pc110pad_dev = input_allocate_device(); 13172155615SDmitry Torokhov if (!pc110pad_dev) { 1322e5b636bSDmitry Torokhov printk(KERN_ERR "pc110pad: Not enough memory.\n"); 13372155615SDmitry Torokhov err = -ENOMEM; 13472155615SDmitry Torokhov goto err_free_irq; 1352e5b636bSDmitry Torokhov } 1361da177e4SLinus Torvalds 1372e5b636bSDmitry Torokhov pc110pad_dev->name = "IBM PC110 TouchPad"; 1382e5b636bSDmitry Torokhov pc110pad_dev->phys = "isa15e0/input0"; 1392e5b636bSDmitry Torokhov pc110pad_dev->id.bustype = BUS_ISA; 1402e5b636bSDmitry Torokhov pc110pad_dev->id.vendor = 0x0003; 1412e5b636bSDmitry Torokhov pc110pad_dev->id.product = 0x0001; 1422e5b636bSDmitry Torokhov pc110pad_dev->id.version = 0x0100; 1431da177e4SLinus Torvalds 1447b19ada2SJiri Slaby pc110pad_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 1457b19ada2SJiri Slaby pc110pad_dev->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y); 1467b19ada2SJiri Slaby pc110pad_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); 1471da177e4SLinus Torvalds 148987a6c02SDaniel Mack input_abs_set_max(pc110pad_dev, ABS_X, 0x1ff); 149987a6c02SDaniel Mack input_abs_set_max(pc110pad_dev, ABS_Y, 0x0ff); 1501da177e4SLinus Torvalds 1512e5b636bSDmitry Torokhov pc110pad_dev->open = pc110pad_open; 1522e5b636bSDmitry Torokhov pc110pad_dev->close = pc110pad_close; 1531da177e4SLinus Torvalds 15472155615SDmitry Torokhov err = input_register_device(pc110pad_dev); 15572155615SDmitry Torokhov if (err) 15672155615SDmitry Torokhov goto err_free_dev; 1571da177e4SLinus Torvalds 1581da177e4SLinus Torvalds return 0; 15972155615SDmitry Torokhov 16072155615SDmitry Torokhov err_free_dev: 16172155615SDmitry Torokhov input_free_device(pc110pad_dev); 16272155615SDmitry Torokhov err_free_irq: 16372155615SDmitry Torokhov free_irq(pc110pad_irq, NULL); 16472155615SDmitry Torokhov err_release_region: 16572155615SDmitry Torokhov release_region(pc110pad_io, 4); 16672155615SDmitry Torokhov 16772155615SDmitry Torokhov return err; 1681da177e4SLinus Torvalds } 1691da177e4SLinus Torvalds 1701da177e4SLinus Torvalds static void __exit pc110pad_exit(void) 1711da177e4SLinus Torvalds { 1721da177e4SLinus Torvalds outb(PC110PAD_OFF, pc110pad_io + 2); 1731da177e4SLinus Torvalds free_irq(pc110pad_irq, NULL); 1742e5b636bSDmitry Torokhov input_unregister_device(pc110pad_dev); 1751da177e4SLinus Torvalds release_region(pc110pad_io, 4); 1761da177e4SLinus Torvalds } 1771da177e4SLinus Torvalds 1781da177e4SLinus Torvalds module_init(pc110pad_init); 1791da177e4SLinus Torvalds module_exit(pc110pad_exit); 180