Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / input / mouse / rpcmouse.c

diff --git a/kernel/drivers/input/mouse/rpcmouse.c b/kernel/drivers/input/mouse/rpcmouse.c
new file mode 100644 (file)
index 0000000..21c60fe
--- /dev/null
+++ b/kernel/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);