File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/drivers/input/mouse/rpcmouse.c b/drivers/input/mouse/rpcmouse.c
new file mode 100644
index 0000000..21c60fe
--- /dev/null
+++ b/drivers/input/mouse/rpcmouse.c
@@ -0,0 +1,116 @@
+/*
+ * 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/ptrace.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+#include <asm/irq.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;
+
+static irqreturn_t rpcmouse_irq(int irq, void *dev_id)
+{
+ 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(IOMEM(0xe0310000)) ^ 0x70);
+
+ dx = x - rpcmouse_lastx;
+ dy = y - rpcmouse_lasty;
+
+ rpcmouse_lastx = x;
+ rpcmouse_lasty = y;
+
+ 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)
+{
+ int err;
+
+ rpcmouse_dev = input_allocate_device();
+ if (!rpcmouse_dev)
+ return -ENOMEM;
+
+ rpcmouse_dev->name = "Acorn RiscPC Mouse";
+ rpcmouse_dev->phys = "rpcmouse/input0";
+ rpcmouse_dev->id.bustype = BUS_HOST;
+ rpcmouse_dev->id.vendor = 0x0005;
+ rpcmouse_dev->id.product = 0x0001;
+ rpcmouse_dev->id.version = 0x0100;
+
+ rpcmouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
+ rpcmouse_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
+ BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
+ rpcmouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
+
+ rpcmouse_lastx = (short) iomd_readl(IOMD_MOUSEX);
+ rpcmouse_lasty = (short) iomd_readl(IOMD_MOUSEY);
+
+ if (request_irq(IRQ_VSYNCPULSE, rpcmouse_irq, IRQF_SHARED, "rpcmouse", rpcmouse_dev)) {
+ printk(KERN_ERR "rpcmouse: unable to allocate VSYNC interrupt\n");
+ err = -EBUSY;
+ goto err_free_dev;
+ }
+
+ err = input_register_device(rpcmouse_dev);
+ if (err)
+ goto err_free_irq;
+
+ return 0;
+
+ err_free_irq:
+ free_irq(IRQ_VSYNCPULSE, rpcmouse_dev);
+ err_free_dev:
+ input_free_device(rpcmouse_dev);
+
+ return err;
+}
+
+static void __exit rpcmouse_exit(void)
+{
+ free_irq(IRQ_VSYNCPULSE, rpcmouse_dev);
+ input_unregister_device(rpcmouse_dev);
+}
+
+module_init(rpcmouse_init);
+module_exit(rpcmouse_exit);