2 * $Id: q40kbd.c,v 1.12 2002/02/02 22:26:44 vojtech Exp $
4 * Copyright (c) 2000-2001 Vojtech Pavlik
6 * Based on the work of:
7 * Richard Zidlicky <Richard.Zidlicky@stud.informatik.uni-erlangen.de>
11 * Q40 PS/2 keyboard controller driver for Linux/m68k
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 * Should you need to contact me, the author, you can do so either by
30 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
31 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
34 #include <linux/module.h>
35 #include <linux/init.h>
36 #include <linux/serio.h>
37 #include <linux/interrupt.h>
38 #include <linux/err.h>
39 #include <linux/bitops.h>
40 #include <linux/platform_device.h>
43 #include <asm/uaccess.h>
44 #include <asm/q40_master.h>
46 #include <asm/q40ints.h>
48 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
49 MODULE_DESCRIPTION("Q40 PS/2 keyboard controller driver");
50 MODULE_LICENSE("GPL");
52 DEFINE_SPINLOCK(q40kbd_lock);
53 static struct serio *q40kbd_port;
54 static struct platform_device *q40kbd_device;
56 static irqreturn_t q40kbd_interrupt(int irq, void *dev_id)
60 spin_lock_irqsave(&q40kbd_lock, flags);
62 if (Q40_IRQ_KEYB_MASK & master_inb(INTERRUPT_REG))
63 serio_interrupt(q40kbd_port, master_inb(KEYCODE_REG), 0);
65 master_outb(-1, KEYBOARD_UNLOCK_REG);
67 spin_unlock_irqrestore(&q40kbd_lock, flags);
73 * q40kbd_flush() flushes all data that may be in the keyboard buffers
76 static void q40kbd_flush(void)
81 spin_lock_irqsave(&q40kbd_lock, flags);
83 while (maxread-- && (Q40_IRQ_KEYB_MASK & master_inb(INTERRUPT_REG)))
84 master_inb(KEYCODE_REG);
86 spin_unlock_irqrestore(&q40kbd_lock, flags);
90 * q40kbd_open() is called when a port is open by the higher layer.
91 * It allocates the interrupt and enables in in the chip.
94 static int q40kbd_open(struct serio *port)
98 if (request_irq(Q40_IRQ_KEYBOARD, q40kbd_interrupt, 0, "q40kbd", NULL)) {
99 printk(KERN_ERR "q40kbd.c: Can't get irq %d.\n", Q40_IRQ_KEYBOARD);
104 master_outb(-1, KEYBOARD_UNLOCK_REG);
105 master_outb(1, KEY_IRQ_ENABLE_REG);
110 static void q40kbd_close(struct serio *port)
112 master_outb(0, KEY_IRQ_ENABLE_REG);
113 master_outb(-1, KEYBOARD_UNLOCK_REG);
114 free_irq(Q40_IRQ_KEYBOARD, NULL);
119 static int __devinit q40kbd_probe(struct platform_device *dev)
121 q40kbd_port = kzalloc(sizeof(struct serio), GFP_KERNEL);
125 q40kbd_port->id.type = SERIO_8042;
126 q40kbd_port->open = q40kbd_open;
127 q40kbd_port->close = q40kbd_close;
128 q40kbd_port->dev.parent = &dev->dev;
129 strlcpy(q40kbd_port->name, "Q40 Kbd Port", sizeof(q40kbd_port->name));
130 strlcpy(q40kbd_port->phys, "Q40", sizeof(q40kbd_port->phys));
132 serio_register_port(q40kbd_port);
133 printk(KERN_INFO "serio: Q40 kbd registered\n");
138 static int __devexit q40kbd_remove(struct platform_device *dev)
140 serio_unregister_port(q40kbd_port);
145 static struct platform_driver q40kbd_driver = {
148 .owner = THIS_MODULE,
150 .probe = q40kbd_probe,
151 .remove = __devexit_p(q40kbd_remove),
154 static int __init q40kbd_init(void)
161 error = platform_driver_register(&q40kbd_driver);
165 q40kbd_device = platform_device_alloc("q40kbd", -1);
167 goto err_unregister_driver;
169 error = platform_device_add(q40kbd_device);
171 goto err_free_device;
176 platform_device_put(q40kbd_device);
177 err_unregister_driver:
178 platform_driver_unregister(&q40kbd_driver);
182 static void __exit q40kbd_exit(void)
184 platform_device_unregister(q40kbd_device);
185 platform_driver_unregister(&q40kbd_driver);
188 module_init(q40kbd_init);
189 module_exit(q40kbd_exit);