2 * $Id: rpckbd.c,v 1.7 2001/09/25 10:12:07 vojtech Exp $
4 * Copyright (c) 2000-2001 Vojtech Pavlik
5 * Copyright (c) 2002 Russell King
9 * Acorn RiscPC PS/2 keyboard controller driver for Linux/ARM
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/interrupt.h>
34 #include <linux/init.h>
35 #include <linux/serio.h>
36 #include <linux/err.h>
37 #include <linux/platform_device.h>
40 #include <asm/hardware.h>
42 #include <asm/hardware/iomd.h>
43 #include <asm/system.h>
45 MODULE_AUTHOR("Vojtech Pavlik, Russell King");
46 MODULE_DESCRIPTION("Acorn RiscPC PS/2 keyboard controller driver");
47 MODULE_LICENSE("GPL");
49 static int rpckbd_write(struct serio *port, unsigned char val)
51 while (!(iomd_readb(IOMD_KCTRL) & (1 << 7)))
54 iomd_writeb(val, IOMD_KARTTX);
59 static irqreturn_t rpckbd_rx(int irq, void *dev_id, struct pt_regs *regs)
61 struct serio *port = dev_id;
63 int handled = IRQ_NONE;
65 while (iomd_readb(IOMD_KCTRL) & (1 << 5)) {
66 byte = iomd_readb(IOMD_KARTRX);
68 serio_interrupt(port, byte, 0, regs);
69 handled = IRQ_HANDLED;
74 static irqreturn_t rpckbd_tx(int irq, void *dev_id, struct pt_regs *regs)
79 static int rpckbd_open(struct serio *port)
81 /* Reset the keyboard state machine. */
82 iomd_writeb(0, IOMD_KCTRL);
83 iomd_writeb(8, IOMD_KCTRL);
84 iomd_readb(IOMD_KARTRX);
86 if (request_irq(IRQ_KEYBOARDRX, rpckbd_rx, 0, "rpckbd", port) != 0) {
87 printk(KERN_ERR "rpckbd.c: Could not allocate keyboard receive IRQ\n");
91 if (request_irq(IRQ_KEYBOARDTX, rpckbd_tx, 0, "rpckbd", port) != 0) {
92 printk(KERN_ERR "rpckbd.c: Could not allocate keyboard transmit IRQ\n");
93 free_irq(IRQ_KEYBOARDRX, NULL);
100 static void rpckbd_close(struct serio *port)
102 free_irq(IRQ_KEYBOARDRX, port);
103 free_irq(IRQ_KEYBOARDTX, port);
107 * Allocate and initialize serio structure for subsequent registration
110 static int __devinit rpckbd_probe(struct platform_device *dev)
114 serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
118 serio->id.type = SERIO_8042;
119 serio->write = rpckbd_write;
120 serio->open = rpckbd_open;
121 serio->close = rpckbd_close;
122 serio->dev.parent = &dev->dev;
123 strlcpy(serio->name, "RiscPC PS/2 kbd port", sizeof(serio->name));
124 strlcpy(serio->phys, "rpckbd/serio0", sizeof(serio->phys));
126 platform_set_drvdata(dev, serio);
127 serio_register_port(serio);
131 static int __devexit rpckbd_remove(struct platform_device *dev)
133 struct serio *serio = platform_get_drvdata(dev);
134 serio_unregister_port(serio);
138 static struct platform_driver rpckbd_driver = {
139 .probe = rpckbd_probe,
140 .remove = __devexit_p(rpckbd_remove),
146 static int __init rpckbd_init(void)
148 return platform_driver_register(&rpckbd_driver);
151 static void __exit rpckbd_exit(void)
153 platform_driver_unregister(&rpckbd_driver);
156 module_init(rpckbd_init);
157 module_exit(rpckbd_exit);