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>
38 #include <asm/hardware.h>
40 #include <asm/hardware/iomd.h>
41 #include <asm/system.h>
43 MODULE_AUTHOR("Vojtech Pavlik, Russell King");
44 MODULE_DESCRIPTION("Acorn RiscPC PS/2 keyboard controller driver");
45 MODULE_LICENSE("GPL");
47 static int rpckbd_write(struct serio *port, unsigned char val)
49 while (!(iomd_readb(IOMD_KCTRL) & (1 << 7)))
52 iomd_writeb(val, IOMD_KARTTX);
57 static irqreturn_t rpckbd_rx(int irq, void *dev_id, struct pt_regs *regs)
59 struct serio *port = dev_id;
61 int handled = IRQ_NONE;
63 while (iomd_readb(IOMD_KCTRL) & (1 << 5)) {
64 byte = iomd_readb(IOMD_KARTRX);
66 serio_interrupt(port, byte, 0, regs);
67 handled = IRQ_HANDLED;
72 static irqreturn_t rpckbd_tx(int irq, void *dev_id, struct pt_regs *regs)
77 static int rpckbd_open(struct serio *port)
79 /* Reset the keyboard state machine. */
80 iomd_writeb(0, IOMD_KCTRL);
81 iomd_writeb(8, IOMD_KCTRL);
82 iomd_readb(IOMD_KARTRX);
84 if (request_irq(IRQ_KEYBOARDRX, rpckbd_rx, 0, "rpckbd", port) != 0) {
85 printk(KERN_ERR "rpckbd.c: Could not allocate keyboard receive IRQ\n");
89 if (request_irq(IRQ_KEYBOARDTX, rpckbd_tx, 0, "rpckbd", port) != 0) {
90 printk(KERN_ERR "rpckbd.c: Could not allocate keyboard transmit IRQ\n");
91 free_irq(IRQ_KEYBOARDRX, NULL);
98 static void rpckbd_close(struct serio *port)
100 free_irq(IRQ_KEYBOARDRX, port);
101 free_irq(IRQ_KEYBOARDTX, port);
104 static struct serio rpckbd_port =
108 .close = rpckbd_close,
109 .write = rpckbd_write,
110 .name = "RiscPC PS/2 kbd port",
111 .phys = "rpckbd/serio0",
114 static int __init rpckbd_init(void)
116 serio_register_port(&rpckbd_port);
120 static void __exit rpckbd_exit(void)
122 serio_unregister_port(&rpckbd_port);
125 module_init(rpckbd_init);
126 module_exit(rpckbd_exit);