1 files changed, 107 insertions, 0 deletions
diff --git a/drivers/input/mouse/rpcmouse.c b/drivers/input/mouse/rpcmouse.c
new file mode 100644
index 00000000000..7280f68afce
--- /dev/null
+++ b/drivers/input/mouse/rpcmouse.c
@@ -0,0 +1,107 @@
+/*
+ *  Acorn RiscPC mouse driver for Linux/ARM
+ *
+ *  Copyright (c) 2000-2002 Vojtech Pavlik
+ *  Copyright (C) 1996-2002 Russell King
+ *
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This handles the Acorn RiscPCs mouse.  We basically have a couple of
+ * hardware registers that track the sensor count for the X-Y movement and
+ * another register holding the button state.  On every VSYNC interrupt we read
+ * the complete state and then work out if something has changed.
+ */
+
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/ptrace.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/input.h>
+
+#include <asm/hardware.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/hardware/iomd.h>
+
+MODULE_AUTHOR("Vojtech Pavlik, Russell King");
+MODULE_DESCRIPTION("Acorn RiscPC mouse driver");
+MODULE_LICENSE("GPL");
+
+static short rpcmouse_lastx, rpcmouse_lasty;
+
+static struct input_dev rpcmouse_dev = {
+	.evbit	= { BIT(EV_KEY) | BIT(EV_REL) },
+	.keybit = { [LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT) },
+	.relbit	= { BIT(REL_X) | BIT(REL_Y) },
+	.name	= "Acorn RiscPC Mouse",
+	.phys	= "rpcmouse/input0",
+	.id	= {
+		.bustype = BUS_HOST,
+		.vendor  = 0x0005,
+		.product = 0x0001,
+		.version = 0x0100,
+	},
+};
+
+static irqreturn_t rpcmouse_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct input_dev *dev = dev_id;
+	short x, y, dx, dy, b;
+
+	x = (short) iomd_readl(IOMD_MOUSEX);
+	y = (short) iomd_readl(IOMD_MOUSEY);
+	b = (short) (__raw_readl(0xe0310000) ^ 0x70);
+
+	dx = x - rpcmouse_lastx;
+	dy = y - rpcmouse_lasty; 
+
+	rpcmouse_lastx = x;
+	rpcmouse_lasty = y;
+
+	input_regs(dev, regs);
+
+	input_report_rel(dev, REL_X, dx);
+	input_report_rel(dev, REL_Y, -dy);
+
+	input_report_key(dev, BTN_LEFT,   b & 0x40);
+	input_report_key(dev, BTN_MIDDLE, b & 0x20);
+	input_report_key(dev, BTN_RIGHT,  b & 0x10);
+
+	input_sync(dev);
+
+	return IRQ_HANDLED;
+}
+
+static int __init rpcmouse_init(void)
+{
+	init_input_dev(&rpcmouse_dev);
+
+	rpcmouse_lastx = (short) iomd_readl(IOMD_MOUSEX);
+	rpcmouse_lasty = (short) iomd_readl(IOMD_MOUSEY);
+
+	if (request_irq(IRQ_VSYNCPULSE, rpcmouse_irq, SA_SHIRQ, "rpcmouse", &rpcmouse_dev)) {
+		printk(KERN_ERR "rpcmouse: unable to allocate VSYNC interrupt\n");
+		return -1;
+	}
+
+	input_register_device(&rpcmouse_dev);
+
+	printk(KERN_INFO "input: Acorn RiscPC mouse\n");
+
+	return 0;
+}
+
+static void __exit rpcmouse_exit(void)
+{
+	input_unregister_device(&rpcmouse_dev);
+	free_irq(IRQ_VSYNCPULSE, &rpcmouse_dev);
+}
+
+module_init(rpcmouse_init);
+module_exit(rpcmouse_exit);