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Commit 5637f02a authored by Kristoffer Ericson's avatar Kristoffer Ericson Committed by Dmitry Torokhov
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Input: add support for the HP Jornada 7xx (710/720/728) touchscreen 



Signed-off-by: default avatarKristoffer Ericson <Kristoffer.Ericson@gmail.com>
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
parent b0a4e1aa

drivers/input/touchscreen/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -126,6 +126,16 @@ config TOUCHSCREEN_HP600 
	  To compile this driver as a module, choose M here: the

	  module will be called hp680_ts_input.



config TOUCHSCREEN_HP7XX

	tristate "HP Jornada 710/720/728 touchscreen"

	depends on SA1100_JORNADA720_SSP

	help

	  Say Y here if you have a HP Jornada 710/720/728 and want

	  to support the built-in touchscreen.



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

	  module will be called jornada720_ts.



config TOUCHSCREEN_PENMOUNT

	tristate "Penmount serial touchscreen"

	select SERIO

drivers/input/touchscreen/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ obj-$(CONFIG_TOUCHSCREEN_FUJITSU) += fujitsu_ts.o 
obj-$(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_USB_COMPOSITE)	+= usbtouchscreen.o

obj-$(CONFIG_TOUCHSCREEN_PENMOUNT)	+= penmount.o

obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT)	+= touchright.o

drivers/input/touchscreen/jornada720_ts.c

0 → 100644
+182 −0
Original line number Diff line number Diff line 
/*

 * drivers/input/touchscreen/jornada720_ts.c

 *

 * Copyright (C) 2007 Kristoffer Ericson <Kristoffer.Ericson@gmail.com>

 *

 *  Copyright (C) 2006 Filip Zyzniewski <filip.zyzniewski@tefnet.pl>

 *  based on HP Jornada 56x touchscreen driver by Alex Lange <chicken@handhelds.org>

 *

 * 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.

 *

 * HP Jornada 710/720/729 Touchscreen Driver

 */



#include <linux/platform_device.h>

#include <linux/init.h>

#include <linux/input.h>

#include <linux/interrupt.h>

#include <linux/module.h>



#include <asm/hardware.h>

#include <asm/arch/jornada720.h>



MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");

MODULE_DESCRIPTION("HP Jornada 710/720/728 touchscreen driver");

MODULE_LICENSE("GPLv2");



struct jornada_ts {

	struct input_dev *dev;

	int x_data[4];		/* X sample values */

	int y_data[4];		/* Y sample values */

};



static void jornada720_ts_collect_data(struct jornada_ts *jornada_ts)

{



    /* 3 low word X samples */

    jornada_ts->x_data[0] = jornada_ssp_byte(TXDUMMY);

    jornada_ts->x_data[1] = jornada_ssp_byte(TXDUMMY);

    jornada_ts->x_data[2] = jornada_ssp_byte(TXDUMMY);



    /* 3 low word Y samples */

    jornada_ts->y_data[0] = jornada_ssp_byte(TXDUMMY);

    jornada_ts->y_data[1] = jornada_ssp_byte(TXDUMMY);

    jornada_ts->y_data[2] = jornada_ssp_byte(TXDUMMY);



    /* combined x samples bits */

    jornada_ts->x_data[3] = jornada_ssp_byte(TXDUMMY);



    /* combined y samples bits */

    jornada_ts->y_data[3] = jornada_ssp_byte(TXDUMMY);

}



static int jornada720_ts_average(int coords[4])

{

	int coord, high_bits = coords[3];



	coord  = coords[0] | ((high_bits & 0x03) << 8);

	coord += coords[1] | ((high_bits & 0x0c) << 6);

	coord += coords[2] | ((high_bits & 0x30) << 4);



	return coord / 3;

}



static irqreturn_t jornada720_ts_interrupt(int irq, void *dev_id)

{

	struct platform_device *pdev = dev_id;

	struct jornada_ts *jornada_ts = platform_get_drvdata(pdev);

	struct input_dev *input = jornada_ts->dev;

	int x, y;



	/* If GPIO_GPIO9 is set to high then report pen up */

	if (GPLR & GPIO_GPIO(9)) {

		input_report_key(input, BTN_TOUCH, 0);

		input_sync(input);

	} else {

		jornada_ssp_start();



		/* proper reply to request is always TXDUMMY */

		if (jornada_ssp_inout(GETTOUCHSAMPLES) == TXDUMMY) {

			jornada720_ts_collect_data(jornada_ts);



			x = jornada720_ts_average(jornada_ts->x_data);

			y = jornada720_ts_average(jornada_ts->y_data);



			input_report_key(input, BTN_TOUCH, 1);

			input_report_abs(input, ABS_X, x);

			input_report_abs(input, ABS_Y, y);

			input_sync(input);

		}



		jornada_ssp_end();

	}



	return IRQ_HANDLED;

}



static int __devinit jornada720_ts_probe(struct platform_device *pdev)

{

	struct jornada_ts *jornada_ts;

	struct input_dev *input_dev;

	int error;



	jornada_ts = kzalloc(sizeof(struct jornada_ts), GFP_KERNEL);

	input_dev = input_allocate_device();



	if (!jornada_ts || !input_dev) {

		error = -ENOMEM;

		goto fail1;

	}



	platform_set_drvdata(pdev, jornada_ts);



	jornada_ts->dev = input_dev;



	input_dev->name = "HP Jornada 7xx Touchscreen";

	input_dev->phys = "jornadats/input0";

	input_dev->id.bustype = BUS_HOST;

	input_dev->dev.parent = &pdev->dev;



	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);

	input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);

	input_set_abs_params(input_dev, ABS_X, 270, 3900, 0, 0);

	input_set_abs_params(input_dev, ABS_Y, 180, 3700, 0, 0);



	error = request_irq(IRQ_GPIO9,

			jornada720_ts_interrupt,

			IRQF_DISABLED | IRQF_TRIGGER_RISING,

			"HP7XX Touchscreen driver", pdev);

	if (error) {

		printk(KERN_INFO "HP7XX TS : Unable to acquire irq!\n");

		goto fail1;

	}



	error = input_register_device(jornada_ts->dev);

	if (error)

		goto fail2;



	return 0;



 fail2:

	free_irq(IRQ_GPIO9, pdev);

 fail1:

	platform_set_drvdata(pdev, NULL);

	input_free_device(input_dev);

	kfree(jornada_ts);

	return error;

}



static int __devexit jornada720_ts_remove(struct platform_device *pdev)

{

	struct jornada_ts *jornada_ts = platform_get_drvdata(pdev);



	free_irq(IRQ_GPIO9, pdev);

	platform_set_drvdata(pdev, NULL);

	input_unregister_device(jornada_ts->dev);

	kfree(jornada_ts);



	return 0;

}



static struct platform_driver jornada720_ts_driver = {

	.probe		= jornada720_ts_probe,

	.remove		= __devexit_p(jornada720_ts_remove),

	.driver		= {

		.name	= "jornada_ts",

	},

};



static int __init jornada720_ts_init(void)

{

	return platform_driver_register(&jornada720_ts_driver);

}



static void __exit jornada720_ts_exit(void)

{

	platform_driver_unregister(&jornada720_ts_driver);

}



module_init(jornada720_ts_init);

module_exit(jornada720_ts_exit);