Commit 3ea7e551 authored by Dmitry Artamonow's avatar Dmitry Artamonow Committed by Dmitry Torokhov
Browse files

Input: driver for touchscreen on iPaq h3xxx 



This adds a driver for the touchscreen connected to the Atmel
microcontroller on the iPAQ h3xxx series.

Based on a driver from handhelds.org 2.6.21 kernel, written by Alessandro
GARDICH, with the bulk of the code for the new input architecture rewritten
by Dmitry Atamonow, and the final polish by Linus Walleij.

Signed-off-by: default avatarAlessandro GARDICH <gremlin@gremlin.it>
Signed-off-by: default avatarDmitry Artamonow <mad_soft@inbox.ru>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent b9f12a5d

drivers/input/touchscreen/Kconfig

+12 −0
Original line number Diff line number Diff line
@@ -471,6 +471,18 @@ config TOUCHSCREEN_HP7XX 
	  To compile this driver as a module, choose M here: the

	  module will be called jornada720_ts.



config TOUCHSCREEN_IPAQ_MICRO

	tristate "HP iPAQ Atmel Micro ASIC touchscreen"

	depends on MFD_IPAQ_MICRO

	help

	  Say Y here to enable support for the touchscreen attached to

	  the Atmel Micro peripheral controller on iPAQ h3100/h3600/h3700



	  If unsure, say N.



	  To compile this driver as a module, choose M here: the

	  module will be called ipaq-micro-ts.



config TOUCHSCREEN_HTCPEN

	tristate "HTC Shift X9500 touchscreen"

	depends on ISA

drivers/input/touchscreen/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -46,6 +46,7 @@ obj-$(CONFIG_TOUCHSCREEN_MTOUCH) += mtouch.o 
obj-$(CONFIG_TOUCHSCREEN_MK712)		+= mk712.o

obj-$(CONFIG_TOUCHSCREEN_HP600)		+= hp680_ts_input.o

obj-$(CONFIG_TOUCHSCREEN_HP7XX)		+= jornada720_ts.o

obj-$(CONFIG_TOUCHSCREEN_IPAQ_MICRO)	+= ipaq-micro-ts.o

obj-$(CONFIG_TOUCHSCREEN_HTCPEN)	+= htcpen.o

obj-$(CONFIG_TOUCHSCREEN_USB_COMPOSITE)	+= usbtouchscreen.o

obj-$(CONFIG_TOUCHSCREEN_PCAP)		+= pcap_ts.o

drivers/input/touchscreen/ipaq-micro-ts.c

0 → 100644
+142 −0
Original line number Diff line number Diff line 
/*

 * 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.

 *

 * h3600 atmel micro companion support, touchscreen subdevice

 * Author : Alessandro Gardich <gremlin@gremlin.it>

 * Author : Dmitry Artamonow <mad_soft@inbox.ru>

 * Author : Linus Walleij <linus.walleij@linaro.org>

 *

 */



#include <asm/byteorder.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/interrupt.h>

#include <linux/pm.h>

#include <linux/delay.h>

#include <linux/device.h>

#include <linux/input.h>

#include <linux/platform_device.h>

#include <linux/slab.h>

#include <linux/mfd/ipaq-micro.h>



struct touchscreen_data {

	struct input_dev *input;

	struct ipaq_micro *micro;

};



static void micro_ts_receive(void *data, int len, unsigned char *msg)

{

	struct touchscreen_data *ts = data;



	if (len == 4) {

		input_report_abs(ts->input, ABS_X,

				 be16_to_cpup((__be16 *) &msg[2]));

		input_report_abs(ts->input, ABS_Y,

				 be16_to_cpup((__be16 *) &msg[0]));

		input_report_key(ts->input, BTN_TOUCH, 1);

		input_sync(ts->input);

	} else if (len == 0) {

		input_report_abs(ts->input, ABS_X, 0);

		input_report_abs(ts->input, ABS_Y, 0);

		input_report_key(ts->input, BTN_TOUCH, 0);

		input_sync(ts->input);

	}

}



static int micro_ts_probe(struct platform_device *pdev)

{

	struct touchscreen_data *ts;

	int ret;



	ts = devm_kzalloc(&pdev->dev, sizeof(*ts), GFP_KERNEL);

	if (!ts)

		return -ENOMEM;

	ts->micro = dev_get_drvdata(pdev->dev.parent);



	platform_set_drvdata(pdev, ts);



	ts->input = devm_input_allocate_device(&pdev->dev);

	if (!ts->input) {

		dev_err(&pdev->dev, "failed to allocate input device\n");

		return -ENOMEM;

	}



	input_set_capability(ts->input, EV_KEY, BTN_TOUCH);

	input_set_capability(ts->input, EV_ABS, ABS_X);

	input_set_capability(ts->input, EV_ABS, ABS_Y);

	input_set_abs_params(ts->input, ABS_X, 0, 1023, 0, 0);

	input_set_abs_params(ts->input, ABS_Y, 0, 1023, 0, 0);



	ts->input->name = "ipaq micro ts";



	ret = input_register_device(ts->input);

	if (ret) {

		dev_err(&pdev->dev, "error registering touch input\n");

		return ret;

	}



	spin_lock_irq(&ts->micro->lock);

	ts->micro->ts = micro_ts_receive;

	ts->micro->ts_data = ts;

	spin_unlock_irq(&ts->micro->lock);



	dev_info(&pdev->dev, "iPAQ micro touchscreen\n");

	return 0;

}



static int micro_ts_remove(struct platform_device *pdev)

{

	struct touchscreen_data *ts = platform_get_drvdata(pdev);



	spin_lock_irq(&ts->micro->lock);

	ts->micro->ts = NULL;

	ts->micro->ts_data = NULL;

	spin_unlock_irq(&ts->micro->lock);



	return 0;

}



#ifdef CONFIG_PM_SLEEP

static int micro_ts_suspend(struct device *dev)

{

	struct touchscreen_data *ts = dev_get_drvdata(dev);



	spin_lock_irq(&ts->micro->lock);

	ts->micro->ts = NULL;

	ts->micro->ts_data = NULL;

	spin_unlock_irq(&ts->micro->lock);

	return 0;

}



static int micro_ts_resume(struct device *dev)

{

	struct touchscreen_data *ts = dev_get_drvdata(dev);



	spin_lock_irq(&ts->micro->lock);

	ts->micro->ts = micro_ts_receive;

	ts->micro->ts_data = ts;

	spin_unlock_irq(&ts->micro->lock);

	return 0;

}

#endif



static const struct dev_pm_ops micro_ts_dev_pm_ops = {

	SET_SYSTEM_SLEEP_PM_OPS(micro_ts_suspend, micro_ts_resume)

};



static struct platform_driver micro_ts_device_driver = {

	.driver	= {

		.name	= "ipaq-micro-ts",

		.pm	= &micro_ts_dev_pm_ops,

	},

	.probe	= micro_ts_probe,

	.remove	= micro_ts_remove,

};

module_platform_driver(micro_ts_device_driver);



MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("driver for iPAQ Atmel micro touchscreen");

MODULE_ALIAS("platform:ipaq-micro-ts");

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