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path: root/drivers/input/serio/rpckbd.c
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Diffstat (limited to 'drivers/input/serio/rpckbd.c')
-rw-r--r--drivers/input/serio/rpckbd.c156
1 files changed, 156 insertions, 0 deletions
diff --git a/drivers/input/serio/rpckbd.c b/drivers/input/serio/rpckbd.c
new file mode 100644
index 00000000000..106f5eefd89
--- /dev/null
+++ b/drivers/input/serio/rpckbd.c
@@ -0,0 +1,156 @@
+/*
+ * $Id: rpckbd.c,v 1.7 2001/09/25 10:12:07 vojtech Exp $
+ *
+ * Copyright (c) 2000-2001 Vojtech Pavlik
+ * Copyright (c) 2002 Russell King
+ */
+
+/*
+ * Acorn RiscPC PS/2 keyboard controller driver for Linux/ARM
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Should you need to contact me, the author, you can do so either by
+ * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
+ * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/serio.h>
+#include <linux/err.h>
+
+#include <asm/irq.h>
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/hardware/iomd.h>
+#include <asm/system.h>
+
+MODULE_AUTHOR("Vojtech Pavlik, Russell King");
+MODULE_DESCRIPTION("Acorn RiscPC PS/2 keyboard controller driver");
+MODULE_LICENSE("GPL");
+
+static int rpckbd_write(struct serio *port, unsigned char val)
+{
+ while (!(iomd_readb(IOMD_KCTRL) & (1 << 7)))
+ cpu_relax();
+
+ iomd_writeb(val, IOMD_KARTTX);
+
+ return 0;
+}
+
+static irqreturn_t rpckbd_rx(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct serio *port = dev_id;
+ unsigned int byte;
+ int handled = IRQ_NONE;
+
+ while (iomd_readb(IOMD_KCTRL) & (1 << 5)) {
+ byte = iomd_readb(IOMD_KARTRX);
+
+ serio_interrupt(port, byte, 0, regs);
+ handled = IRQ_HANDLED;
+ }
+ return handled;
+}
+
+static irqreturn_t rpckbd_tx(int irq, void *dev_id, struct pt_regs *regs)
+{
+ return IRQ_HANDLED;
+}
+
+static int rpckbd_open(struct serio *port)
+{
+ /* Reset the keyboard state machine. */
+ iomd_writeb(0, IOMD_KCTRL);
+ iomd_writeb(8, IOMD_KCTRL);
+ iomd_readb(IOMD_KARTRX);
+
+ if (request_irq(IRQ_KEYBOARDRX, rpckbd_rx, 0, "rpckbd", port) != 0) {
+ printk(KERN_ERR "rpckbd.c: Could not allocate keyboard receive IRQ\n");
+ return -EBUSY;
+ }
+
+ if (request_irq(IRQ_KEYBOARDTX, rpckbd_tx, 0, "rpckbd", port) != 0) {
+ printk(KERN_ERR "rpckbd.c: Could not allocate keyboard transmit IRQ\n");
+ free_irq(IRQ_KEYBOARDRX, NULL);
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+static void rpckbd_close(struct serio *port)
+{
+ free_irq(IRQ_KEYBOARDRX, port);
+ free_irq(IRQ_KEYBOARDTX, port);
+}
+
+/*
+ * Allocate and initialize serio structure for subsequent registration
+ * with serio core.
+ */
+static int __devinit rpckbd_probe(struct device *dev)
+{
+ struct serio *serio;
+
+ serio = kmalloc(sizeof(struct serio), GFP_KERNEL);
+ if (!serio)
+ return -ENOMEM;
+
+ memset(serio, 0, sizeof(struct serio));
+ serio->id.type = SERIO_8042;
+ serio->write = rpckbd_write;
+ serio->open = rpckbd_open;
+ serio->close = rpckbd_close;
+ serio->dev.parent = dev;
+ strlcpy(serio->name, "RiscPC PS/2 kbd port", sizeof(serio->name));
+ strlcpy(serio->phys, "rpckbd/serio0", sizeof(serio->phys));
+
+ dev_set_drvdata(dev, serio);
+ serio_register_port(serio);
+ return 0;
+}
+
+static int __devexit rpckbd_remove(struct device *dev)
+{
+ struct serio *serio = dev_get_drvdata(dev);
+ serio_unregister_port(serio);
+ return 0;
+}
+
+static struct device_driver rpckbd_driver = {
+ .name = "kart",
+ .bus = &platform_bus_type,
+ .probe = rpckbd_probe,
+ .remove = __devexit_p(rpckbd_remove),
+};
+
+static int __init rpckbd_init(void)
+{
+ return driver_register(&rpckbd_driver);
+}
+
+static void __exit rpckbd_exit(void)
+{
+ driver_unregister(&rpckbd_driver);
+}
+
+module_init(rpckbd_init);
+module_exit(rpckbd_exit);