cregit-Linux how code gets into the kernel

Release 4.11 drivers/input/mouse/pc110pad.c

/*
 *  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 <linux/delay.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(handshake | 1, pc110pad_io + 2); udelay(2); outb(handshake & ~1, pc110pad_io + 2); udelay(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; }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik15689.14%240.00%
Ingo Molnar126.86%120.00%
Andrew Morton74.00%240.00%
Total175100.00%5100.00%


static void pc110pad_close(struct input_dev *dev) { outb(PC110PAD_OFF, pc110pad_io + 2); }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik20100.00%1100.00%
Total20100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik4593.75%150.00%
Al Viro36.25%150.00%
Total48100.00%2100.00%

/* * 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) { int err; if (!no_pci_devices()) 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_MASK(EV_KEY) | BIT_MASK(EV_ABS); pc110pad_dev->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y); pc110pad_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); input_abs_set_max(pc110pad_dev, ABS_X, 0x1ff); input_abs_set_max(pc110pad_dev, 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; }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik14048.61%110.00%
Dmitry Torokhov12041.67%220.00%
Daniel Mack103.47%110.00%
Jiri Slaby62.08%110.00%
Linus Torvalds62.08%110.00%
Roel Kluin31.04%110.00%
Al Viro10.35%110.00%
David Shaohua Li10.35%110.00%
Akinobu Mita10.35%110.00%
Total288100.00%10100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik3183.78%133.33%
Dmitry Torokhov513.51%133.33%
Al Viro12.70%133.33%
Total37100.00%3100.00%

module_init(pc110pad_init); module_exit(pc110pad_exit);

Overall Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik47971.81%212.50%
Dmitry Torokhov12618.89%212.50%
Ingo Molnar152.25%16.25%
Linus Torvalds101.50%16.25%
Daniel Mack101.50%16.25%
Andrew Morton71.05%212.50%
Jiri Slaby60.90%16.25%
Al Viro50.75%16.25%
Roel Kluin30.45%16.25%
William Lee Irwin III30.45%16.25%
Adrian Bunk10.15%16.25%
Akinobu Mita10.15%16.25%
David Shaohua Li10.15%16.25%
Total667100.00%16100.00%
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