/* * $Id: q40kbd.c,v 1.12 2002/02/02 22:26:44 vojtech Exp $ * *  Copyright (c) 2000-2001 Vojtech Pavlik * *  Based on the work of: *	Richard Zidlicky <Richard.Zidlicky@stud.informatik.uni-erlangen.de> *//* * Q40 PS/2 keyboard controller driver for Linux/m68k *//* * 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/init.h>#include <linux/serio.h>#include <linux/interrupt.h>#include <linux/err.h>#include <linux/bitops.h>#include <asm/io.h>#include <asm/uaccess.h>#include <asm/q40_master.h>#include <asm/irq.h>#include <asm/q40ints.h>MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");MODULE_DESCRIPTION("Q40 PS/2 keyboard controller driver");MODULE_LICENSE("GPL");DEFINE_SPINLOCK(q40kbd_lock);static struct serio *q40kbd_port;static struct platform_device *q40kbd_device;static irqreturn_t q40kbd_interrupt(int irq, void *dev_id, struct pt_regs *regs){	unsigned long flags;	spin_lock_irqsave(&q40kbd_lock, flags);	if (Q40_IRQ_KEYB_MASK & master_inb(INTERRUPT_REG))		serio_interrupt(q40kbd_port, master_inb(KEYCODE_REG), 0, regs);	master_outb(-1, KEYBOARD_UNLOCK_REG);	spin_unlock_irqrestore(&q40kbd_lock, flags);	return IRQ_HANDLED;}/* * q40kbd_flush() flushes all data that may be in the keyboard buffers */static void q40kbd_flush(void){ 	int maxread = 100;	unsigned long flags;	spin_lock_irqsave(&q40kbd_lock, flags); 	while (maxread-- && (Q40_IRQ_KEYB_MASK & master_inb(INTERRUPT_REG))) 		master_inb(KEYCODE_REG);	spin_unlock_irqrestore(&q40kbd_lock, flags);}/* * q40kbd_open() is called when a port is open by the higher layer. * It allocates the interrupt and enables in in the chip. */static int q40kbd_open(struct serio *port){	q40kbd_flush();	if (request_irq(Q40_IRQ_KEYBOARD, q40kbd_interrupt, 0, "q40kbd", NULL)) {		printk(KERN_ERR "q40kbd.c: Can't get irq %d.\n", Q40_IRQ_KEYBOARD);		return -1;	} 	/* off we go */ 	master_outb(-1, KEYBOARD_UNLOCK_REG); 	master_outb(1, KEY_IRQ_ENABLE_REG); 	return 0;}static void q40kbd_close(struct serio *port){	master_outb(0, KEY_IRQ_ENABLE_REG);	master_outb(-1, KEYBOARD_UNLOCK_REG);	free_irq(Q40_IRQ_KEYBOARD, NULL);	q40kbd_flush();}static struct serio * __init q40kbd_allocate_port(void){	struct serio *serio;	serio = kmalloc(sizeof(struct serio), GFP_KERNEL);	if (serio) {		memset(serio, 0, sizeof(struct serio));		serio->id.type		= SERIO_8042;		serio->open		= q40kbd_open;		serio->close		= q40kbd_close;		serio->dev.parent	= &q40kbd_device->dev;		strlcpy(serio->name, "Q40 Kbd Port", sizeof(serio->name));		strlcpy(serio->phys, "Q40", sizeof(serio->phys));	}	return serio;}static int __init q40kbd_init(void){	if (!MACH_IS_Q40)		return -EIO;	q40kbd_device = platform_device_register_simple("q40kbd", -1, NULL, 0);	if (IS_ERR(q40kbd_device))		return PTR_ERR(q40kbd_device);	if (!(q40kbd_port = q40kbd_allocate_port())) {		platform_device_unregister(q40kbd_device);		return -ENOMEM;	}	serio_register_port(q40kbd_port);	printk(KERN_INFO "serio: Q40 kbd registered\n");	return 0;}static void __exit q40kbd_exit(void){	serio_unregister_port(q40kbd_port);	platform_device_unregister(q40kbd_device);}module_init(q40kbd_init);module_exit(q40kbd_exit);