2 * Copyright (c) 2000-2001 Vojtech Pavlik
3 * Copyright (c) 2002 Russell King
7 * Acorn RiscPC PS/2 keyboard controller driver for Linux/ARM
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 * Should you need to contact me, the author, you can do so either by
26 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
27 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
30 #include <linux/module.h>
31 #include <linux/interrupt.h>
32 #include <linux/init.h>
33 #include <linux/serio.h>
34 #include <linux/err.h>
35 #include <linux/platform_device.h>
37 #include <linux/slab.h>
39 #include <mach/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");
46 MODULE_ALIAS("platform:kart");
53 static int rpckbd_write(struct serio *port, unsigned char val)
55 while (!(iomd_readb(IOMD_KCTRL) & (1 << 7)))
58 iomd_writeb(val, IOMD_KARTTX);
63 static irqreturn_t rpckbd_rx(int irq, void *dev_id)
65 struct serio *port = dev_id;
67 int handled = IRQ_NONE;
69 while (iomd_readb(IOMD_KCTRL) & (1 << 5)) {
70 byte = iomd_readb(IOMD_KARTRX);
72 serio_interrupt(port, byte, 0);
73 handled = IRQ_HANDLED;
78 static irqreturn_t rpckbd_tx(int irq, void *dev_id)
83 static int rpckbd_open(struct serio *port)
85 struct rpckbd_data *rpckbd = port->port_data;
87 /* Reset the keyboard state machine. */
88 iomd_writeb(0, IOMD_KCTRL);
89 iomd_writeb(8, IOMD_KCTRL);
90 iomd_readb(IOMD_KARTRX);
92 if (request_irq(rpckbd->rx_irq, rpckbd_rx, 0, "rpckbd", port) != 0) {
93 printk(KERN_ERR "rpckbd.c: Could not allocate keyboard receive IRQ\n");
97 if (request_irq(rpckbd->tx_irq, rpckbd_tx, 0, "rpckbd", port) != 0) {
98 printk(KERN_ERR "rpckbd.c: Could not allocate keyboard transmit IRQ\n");
99 free_irq(rpckbd->rx_irq, port);
106 static void rpckbd_close(struct serio *port)
108 struct rpckbd_data *rpckbd = port->port_data;
110 free_irq(rpckbd->rx_irq, port);
111 free_irq(rpckbd->tx_irq, port);
115 * Allocate and initialize serio structure for subsequent registration
118 static int __devinit rpckbd_probe(struct platform_device *dev)
120 struct rpckbd_data *rpckbd;
124 rx_irq = platform_get_irq(dev, 0);
126 return rx_irq < 0 ? rx_irq : -ENXIO;
128 tx_irq = platform_get_irq(dev, 1);
130 return tx_irq < 0 ? tx_irq : -ENXIO;
132 serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
133 rpckbd = kzalloc(sizeof(*rpckbd), GFP_KERNEL);
134 if (!serio || !rpckbd) {
140 rpckbd->rx_irq = rx_irq;
141 rpckbd->tx_irq = tx_irq;
143 serio->id.type = SERIO_8042;
144 serio->write = rpckbd_write;
145 serio->open = rpckbd_open;
146 serio->close = rpckbd_close;
147 serio->dev.parent = &dev->dev;
148 serio->port_data = rpckbd;
149 strlcpy(serio->name, "RiscPC PS/2 kbd port", sizeof(serio->name));
150 strlcpy(serio->phys, "rpckbd/serio0", sizeof(serio->phys));
152 platform_set_drvdata(dev, serio);
153 serio_register_port(serio);
157 static int __devexit rpckbd_remove(struct platform_device *dev)
159 struct serio *serio = platform_get_drvdata(dev);
160 struct rpckbd_data *rpckbd = serio->port_data;
162 serio_unregister_port(serio);
168 static struct platform_driver rpckbd_driver = {
169 .probe = rpckbd_probe,
170 .remove = __devexit_p(rpckbd_remove),
173 .owner = THIS_MODULE,
176 module_platform_driver(rpckbd_driver);