2 * Copyright (c) 2000-2001 Vojtech Pavlik
4 * Based on the work of:
5 * Richard Zidlicky <Richard.Zidlicky@stud.informatik.uni-erlangen.de>
9 * Q40 PS/2 keyboard controller driver for Linux/m68k
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 * Should you need to contact me, the author, you can do so either by
28 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
29 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
32 #include <linux/module.h>
33 #include <linux/init.h>
34 #include <linux/serio.h>
35 #include <linux/interrupt.h>
36 #include <linux/err.h>
37 #include <linux/bitops.h>
38 #include <linux/platform_device.h>
41 #include <asm/uaccess.h>
42 #include <asm/q40_master.h>
44 #include <asm/q40ints.h>
46 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
47 MODULE_DESCRIPTION("Q40 PS/2 keyboard controller driver");
48 MODULE_LICENSE("GPL");
50 static DEFINE_SPINLOCK(q40kbd_lock);
51 static struct serio *q40kbd_port;
52 static struct platform_device *q40kbd_device;
54 static irqreturn_t q40kbd_interrupt(int irq, void *dev_id)
58 spin_lock_irqsave(&q40kbd_lock, flags);
60 if (Q40_IRQ_KEYB_MASK & master_inb(INTERRUPT_REG))
61 serio_interrupt(q40kbd_port, master_inb(KEYCODE_REG), 0);
63 master_outb(-1, KEYBOARD_UNLOCK_REG);
65 spin_unlock_irqrestore(&q40kbd_lock, flags);
71 * q40kbd_flush() flushes all data that may be in the keyboard buffers
74 static void q40kbd_flush(void)
79 spin_lock_irqsave(&q40kbd_lock, flags);
81 while (maxread-- && (Q40_IRQ_KEYB_MASK & master_inb(INTERRUPT_REG)))
82 master_inb(KEYCODE_REG);
84 spin_unlock_irqrestore(&q40kbd_lock, flags);
88 * q40kbd_open() is called when a port is open by the higher layer.
89 * It allocates the interrupt and enables in in the chip.
92 static int q40kbd_open(struct serio *port)
96 if (request_irq(Q40_IRQ_KEYBOARD, q40kbd_interrupt, 0, "q40kbd", NULL)) {
97 printk(KERN_ERR "q40kbd.c: Can't get irq %d.\n", Q40_IRQ_KEYBOARD);
102 master_outb(-1, KEYBOARD_UNLOCK_REG);
103 master_outb(1, KEY_IRQ_ENABLE_REG);
108 static void q40kbd_close(struct serio *port)
110 master_outb(0, KEY_IRQ_ENABLE_REG);
111 master_outb(-1, KEYBOARD_UNLOCK_REG);
112 free_irq(Q40_IRQ_KEYBOARD, NULL);
117 static int __devinit q40kbd_probe(struct platform_device *dev)
119 q40kbd_port = kzalloc(sizeof(struct serio), GFP_KERNEL);
123 q40kbd_port->id.type = SERIO_8042;
124 q40kbd_port->open = q40kbd_open;
125 q40kbd_port->close = q40kbd_close;
126 q40kbd_port->dev.parent = &dev->dev;
127 strlcpy(q40kbd_port->name, "Q40 Kbd Port", sizeof(q40kbd_port->name));
128 strlcpy(q40kbd_port->phys, "Q40", sizeof(q40kbd_port->phys));
130 serio_register_port(q40kbd_port);
131 printk(KERN_INFO "serio: Q40 kbd registered\n");
136 static int __devexit q40kbd_remove(struct platform_device *dev)
138 serio_unregister_port(q40kbd_port);
143 static struct platform_driver q40kbd_driver = {
146 .owner = THIS_MODULE,
148 .probe = q40kbd_probe,
149 .remove = __devexit_p(q40kbd_remove),
152 static int __init q40kbd_init(void)
159 error = platform_driver_register(&q40kbd_driver);
163 q40kbd_device = platform_device_alloc("q40kbd", -1);
165 goto err_unregister_driver;
167 error = platform_device_add(q40kbd_device);
169 goto err_free_device;
174 platform_device_put(q40kbd_device);
175 err_unregister_driver:
176 platform_driver_unregister(&q40kbd_driver);
180 static void __exit q40kbd_exit(void)
182 platform_device_unregister(q40kbd_device);
183 platform_driver_unregister(&q40kbd_driver);
186 module_init(q40kbd_init);
187 module_exit(q40kbd_exit);