Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / macintosh / ams / ams-input.c

diff --git a/kernel/drivers/macintosh/ams/ams-input.c b/kernel/drivers/macintosh/ams/ams-input.c
new file mode 100644 (file)
index 0000000..2edae7d
--- /dev/null
+++ b/kernel/drivers/macintosh/ams/ams-input.c
@@ -0,0 +1,161 @@
+/*
+ * Apple Motion Sensor driver (joystick emulation)
+ *
+ * Copyright (C) 2005 Stelian Pop (stelian@popies.net)
+ * Copyright (C) 2006 Michael Hanselmann (linux-kernel@hansmi.ch)
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+
+#include "ams.h"
+
+static bool joystick;
+module_param(joystick, bool, S_IRUGO);
+MODULE_PARM_DESC(joystick, "Enable the input class device on module load");
+
+static bool invert;
+module_param(invert, bool, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(invert, "Invert input data on X and Y axis");
+
+static DEFINE_MUTEX(ams_input_mutex);
+
+static void ams_idev_poll(struct input_polled_dev *dev)
+{
+       struct input_dev *idev = dev->input;
+       s8 x, y, z;
+
+       mutex_lock(&ams_info.lock);
+
+       ams_sensors(&x, &y, &z);
+
+       x -= ams_info.xcalib;
+       y -= ams_info.ycalib;
+       z -= ams_info.zcalib;
+
+       input_report_abs(idev, ABS_X, invert ? -x : x);
+       input_report_abs(idev, ABS_Y, invert ? -y : y);
+       input_report_abs(idev, ABS_Z, z);
+
+       input_sync(idev);
+
+       mutex_unlock(&ams_info.lock);
+}
+
+/* Call with ams_info.lock held! */
+static int ams_input_enable(void)
+{
+       struct input_dev *input;
+       s8 x, y, z;
+       int error;
+
+       ams_sensors(&x, &y, &z);
+       ams_info.xcalib = x;
+       ams_info.ycalib = y;
+       ams_info.zcalib = z;
+
+       ams_info.idev = input_allocate_polled_device();
+       if (!ams_info.idev)
+               return -ENOMEM;
+
+       ams_info.idev->poll = ams_idev_poll;
+       ams_info.idev->poll_interval = 25;
+
+       input = ams_info.idev->input;
+       input->name = "Apple Motion Sensor";
+       input->id.bustype = ams_info.bustype;
+       input->id.vendor = 0;
+       input->dev.parent = &ams_info.of_dev->dev;
+
+       input_set_abs_params(input, ABS_X, -50, 50, 3, 0);
+       input_set_abs_params(input, ABS_Y, -50, 50, 3, 0);
+       input_set_abs_params(input, ABS_Z, -50, 50, 3, 0);
+
+       set_bit(EV_ABS, input->evbit);
+       set_bit(EV_KEY, input->evbit);
+       set_bit(BTN_TOUCH, input->keybit);
+
+       error = input_register_polled_device(ams_info.idev);
+       if (error) {
+               input_free_polled_device(ams_info.idev);
+               ams_info.idev = NULL;
+               return error;
+       }
+
+       joystick = 1;
+
+       return 0;
+}
+
+static void ams_input_disable(void)
+{
+       if (ams_info.idev) {
+               input_unregister_polled_device(ams_info.idev);
+               input_free_polled_device(ams_info.idev);
+               ams_info.idev = NULL;
+       }
+
+       joystick = 0;
+}
+
+static ssize_t ams_input_show_joystick(struct device *dev,
+       struct device_attribute *attr, char *buf)
+{
+       return sprintf(buf, "%d\n", joystick);
+}
+
+static ssize_t ams_input_store_joystick(struct device *dev,
+       struct device_attribute *attr, const char *buf, size_t count)
+{
+       unsigned long enable;
+       int error = 0;
+       int ret;
+
+       ret = kstrtoul(buf, 0, &enable);
+       if (ret)
+               return ret;
+       if (enable > 1)
+               return -EINVAL;
+
+       mutex_lock(&ams_input_mutex);
+
+       if (enable != joystick) {
+               if (enable)
+                       error = ams_input_enable();
+               else
+                       ams_input_disable();
+       }
+
+       mutex_unlock(&ams_input_mutex);
+
+       return error ? error : count;
+}
+
+static DEVICE_ATTR(joystick, S_IRUGO | S_IWUSR,
+       ams_input_show_joystick, ams_input_store_joystick);
+
+int ams_input_init(void)
+{
+       if (joystick)
+               ams_input_enable();
+
+       return device_create_file(&ams_info.of_dev->dev, &dev_attr_joystick);
+}
+
+void ams_input_exit(void)
+{
+       device_remove_file(&ams_info.of_dev->dev, &dev_attr_joystick);
+
+       mutex_lock(&ams_input_mutex);
+       ams_input_disable();
+       mutex_unlock(&ams_input_mutex);
+}