Input: add gpio-mouse driver

Adds support for simulating a mouse using GPIO lines. The driver
needs an appropriate platform device to be created by architecture
code.

The driver has been tested on AT32AP7000 microprocessor using the
ATSTK1000 development board.

Signed-off-by: Hans-Christian Egtvedt <hcegtvedt@atmel.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 61 insertions, 0 deletions

diff --git a/include/linux/gpio_mouse.h b/include/linux/gpio_mouse.h
new file mode 100644
index 000000000000..44ed7aa14d85
--- /dev/null
+++ b/include/linux/gpio_mouse.h
@@ -0,0 +1,61 @@
+/*
+ * Driver for simulating a mouse on GPIO lines.
+ *
+ * Copyright (C) 2007 Atmel Corporation
+ *
+ * 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.
+ */
+
+#ifndef _GPIO_MOUSE_H
+#define _GPIO_MOUSE_H
+
+#define GPIO_MOUSE_POLARITY_ACT_HIGH    0x00
+#define GPIO_MOUSE_POLARITY_ACT_LOW     0x01
+
+#define GPIO_MOUSE_PIN_UP       0
+#define GPIO_MOUSE_PIN_DOWN     1
+#define GPIO_MOUSE_PIN_LEFT     2
+#define GPIO_MOUSE_PIN_RIGHT    3
+#define GPIO_MOUSE_PIN_BLEFT    4
+#define GPIO_MOUSE_PIN_BMIDDLE  5
+#define GPIO_MOUSE_PIN_BRIGHT   6
+#define GPIO_MOUSE_PIN_MAX      7
+
+/**
+ * struct gpio_mouse_platform_data
+ * @scan_ms: integer in ms specifying the scan periode.
+ * @polarity: Pin polarity, active high or low.
+ * @up: GPIO line for up value.
+ * @down: GPIO line for down value.
+ * @left: GPIO line for left value.
+ * @right: GPIO line for right value.
+ * @bleft: GPIO line for left button.
+ * @bmiddle: GPIO line for middle button.
+ * @bright: GPIO line for right button.
+ *
+ * This struct must be added to the platform_device in the board code.
+ * It is used by the gpio_mouse driver to setup GPIO lines and to
+ * calculate mouse movement.
+ */
+struct gpio_mouse_platform_data {
+        int scan_ms;
+        int polarity;
+
+        union {
+                struct {
+                        int up;
+                        int down;
+                        int left;
+                        int right;
+
+                        int bleft;
+                        int bmiddle;
+                        int bright;
+                };
+                int pins[GPIO_MOUSE_PIN_MAX];
+        };
+};
+
+#endif /* _GPIO_MOUSE_H */