ARM: NEC MobilePro900/c touchscreen platform driver.

ARM: NEC MobilePro900/c touchscreen platform driver.
 Touchscreen driver depends on mp900-pic driver.

Signed-off-by: Yulay Rakhmangulov <yulayr@gmail.com>
Signed-off-by: Kristoffer Ericson <kristoffer.ericson@gmail.com>

3 files changed, 172 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 8a8fa4d2d6a842..03e7cc1ef9cefb 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -217,6 +217,17 @@ config TOUCHSCREEN_MCS5000
 	  To compile this driver as a module, choose M here: the
 	  module will be called mcs5000_ts.
 
+config TOUCHSCREEN_MP900C
+	tristate "NEC MobilePro 900c touchscreen"
+	depends on MACH_MP900C
+	default y
+	help
+	  Say Y here if you have a NEC MobilePro 900c and want to
+	  support the built-in touchscreen.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called mp900_ts.
+
 config TOUCHSCREEN_MTOUCH
 	tristate "MicroTouch serial touchscreens"
 	select SERIO
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 7fef7d5cca234b..119ec27155e0f8 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -22,6 +22,7 @@ obj-$(CONFIG_TOUCHSCREEN_INEXIO)	+= inexio.o
 obj-$(CONFIG_TOUCHSCREEN_MC13783)	+= mc13783_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MCS5000)	+= mcs5000_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MIGOR)		+= migor_ts.o
+obj-$(CONFIG_TOUCHSCREEN_MP900C)	+= mp900_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MTOUCH)	+= mtouch.o
 obj-$(CONFIG_TOUCHSCREEN_MK712)		+= mk712.o
 obj-$(CONFIG_TOUCHSCREEN_HP600)		+= hp680_ts_input.o
diff --git a/drivers/input/touchscreen/mp900_ts.c b/drivers/input/touchscreen/mp900_ts.c
new file mode 100644
index 00000000000000..0c73b4f929c758
--- /dev/null
+++ b/drivers/input/touchscreen/mp900_ts.c
@@ -0,0 +1,160 @@
+/* drivers/input/touchscreen/mp900_ts.c
+ *
+ * input driver for the NEC MobilePro900/c touchscreen
+ *
+ * 2010(c) Yulay Rakhmangulov <yulayr@gmail.com>
+ * based on (c) 2007 mp900_kbd.c driver by
+ *	Michael Petchkovsky <mkpetch@internode.on.net>
+ *
+ * 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.
+ */
+
+#include <linux/input.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/workqueue.h>
+#include <linux/platform_device.h>
+#include <mach/pic-pxa2xx.h>
+
+#define PFX "mp900-ts: "
+
+static struct input_dev *dev_ts;
+
+static inline void request_touch_scan(void)
+{
+	unsigned char cmd = PIC_TS_SCAN_REQUEST;
+	send_to_pic(&cmd, 1);
+}
+
+static inline void disable_touchscreen(void)
+{
+	unsigned char cmd = PIC_DISABLE_TOUCHSCREEN;
+	send_to_pic(&cmd, 1);
+}
+
+static void update_position(const unsigned char *buf)
+{
+	int x, y;
+
+	x = 256 * buf[0] + buf[1];
+	y = 256 * buf[2] + buf[3];
+
+	input_report_key(dev_ts, BTN_TOUCH, 1);
+	input_report_abs(dev_ts, ABS_X, x);
+	input_report_abs(dev_ts, ABS_Y, y);
+	input_report_abs(dev_ts, ABS_PRESSURE, 1);
+	input_sync(dev_ts);
+}
+
+static void notify_pen_lifted(void)
+{
+	disable_touchscreen();
+
+	input_report_key(dev_ts, BTN_TOUCH, 0);
+	input_report_abs(dev_ts, ABS_PRESSURE, 0);
+	input_sync(dev_ts);
+
+	request_touch_scan();
+}
+
+static struct pic_touchscreen_ops touchscreen_ops = {
+	.update_position	= update_position,
+	.notify_pen_lifted	= notify_pen_lifted
+};
+
+#ifdef CONFIG_PM
+static int suspend_touchscreen(struct device *dev)
+{
+	disable_touchscreen();
+	return 0;
+}
+
+static int resume_touchscreen(struct device *dev)
+{
+	request_touch_scan();
+	return 0;
+}
+
+static const struct dev_pm_ops mp900_ts_pm_ops = {
+	.suspend	= suspend_touchscreen,
+	.resume		= resume_touchscreen,
+};
+#endif
+
+static int __devinit mp900_ts_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+
+	printk(KERN_INFO PFX "initializing touchscreen\n");
+
+	/* Touchscreen */
+	dev_ts = input_allocate_device();
+	dev_ts->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
+	dev_ts->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
+	set_bit(BTN_TOUCH, dev_ts->keybit);
+
+	/* Not generic values, will need adjusting */
+	dev_ts->absmin[ABS_X] = 32;
+	dev_ts->absmin[ABS_Y] = 96;
+	dev_ts->absmax[ABS_X] = 1004;
+	dev_ts->absmax[ABS_Y] = 792;
+	dev_ts->name = "MobilePro900/c touchscreen";
+	dev_ts->phys = "mp900-ts/input0";
+	dev_ts->dev.parent = &pdev->dev;
+
+	ret = input_register_device(dev_ts);
+	if (ret) {
+		printk(KERN_ERR PFX "failed to register touch device!\n");
+		return ret;
+	}
+
+	pic_register_device(PIC_TOUCHSCREEN, (void *)&touchscreen_ops);
+
+	request_touch_scan();
+	return 0;
+}
+
+static int __devexit mp900_ts_remove(struct platform_device *pdev)
+{
+	pic_unregister_device(PIC_TOUCHSCREEN, (void *)&touchscreen_ops);
+
+	input_unregister_device(dev_ts);
+
+	printk(KERN_INFO PFX "touchscreen device removed\n");
+	return 0;
+}
+
+static struct platform_driver mp900_ts_driver = {
+	.probe   = mp900_ts_probe,
+	.remove  = __devexit_p(mp900_ts_remove),
+
+	.driver  = {
+		.name    = "mp900-ts",
+		.owner	= THIS_MODULE,
+#ifdef CONFIG_PM
+		.pm	= &mp900_ts_pm_ops,
+#endif
+	 },
+};
+
+static int __init mp900_ts_init(void)
+{
+	return platform_driver_register(&mp900_ts_driver);
+}
+
+static void __exit mp900_ts_exit(void)
+{
+	platform_driver_unregister(&mp900_ts_driver);
+}
+
+module_init(mp900_ts_init);
+module_exit(mp900_ts_exit);
+
+MODULE_AUTHOR("Yulay Rakhmangulov");
+MODULE_DESCRIPTION("MobilePro900/c touchscreen driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:mp900-ts");