Input: add driver for Tabletkiosk Sahara TouchIT-213 touchscreen
Signed-off-by: Claudio Nieder <private@claudio.ch> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Claudio Nieder
Dmitry Torokhov
Родитель
3bee2a04cf
Коммит
7342239273
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@ -351,4 +351,15 @@ config TOUCHSCREEN_USB_GOTOP
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bool "GoTop Super_Q2/GogoPen/PenPower tablet device support" if EMBEDDED
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depends on TOUCHSCREEN_USB_COMPOSITE
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config TOUCHSCREEN_TOUCHIT213
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tristate "Sahara TouchIT-213 touchscreen"
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select SERIO
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help
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Say Y here if you have a Sahara TouchIT-213 Tablet PC.
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If unsure, say N.
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To compile this driver as a module, choose M here: the
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module will be called touchit213.
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endif
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@ -21,6 +21,7 @@ obj-$(CONFIG_TOUCHSCREEN_HP7XX) += jornada720_ts.o
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obj-$(CONFIG_TOUCHSCREEN_HTCPEN) += htcpen.o
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obj-$(CONFIG_TOUCHSCREEN_USB_COMPOSITE) += usbtouchscreen.o
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obj-$(CONFIG_TOUCHSCREEN_PENMOUNT) += penmount.o
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obj-$(CONFIG_TOUCHSCREEN_TOUCHIT213) += touchit213.o
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obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT) += touchright.o
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obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o
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obj-$(CONFIG_TOUCHSCREEN_UCB1400) += ucb1400_ts.o
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@ -0,0 +1,234 @@
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/*
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* Sahara TouchIT-213 serial touchscreen driver
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*
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* Copyright (c) 2007-2008 Claudio Nieder <private@claudio.ch>
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*
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* Based on Touchright driver (drivers/input/touchscreen/touchright.c)
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* Copyright (c) 2006 Rick Koch <n1gp@hotmail.com>
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* Copyright (c) 2004 Vojtech Pavlik
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* and Dan Streetman <ddstreet@ieee.org>
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*/
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/serio.h>
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#include <linux/init.h>
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#define DRIVER_DESC "Sahara TouchIT-213 serial touchscreen driver"
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MODULE_AUTHOR("Claudio Nieder <private@claudio.ch>");
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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/*
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* Definitions & global arrays.
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*/
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/*
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* Data is received through COM1 at 9600bit/s,8bit,no parity in packets
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* of 5 byte each.
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*
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* +--------+ +--------+ +--------+ +--------+ +--------+
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* |1000000p| |0xxxxxxx| |0xxxxxxx| |0yyyyyyy| |0yyyyyyy|
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* +--------+ +--------+ +--------+ +--------+ +--------+
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* MSB LSB MSB LSB
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*
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* The value of p is 1 as long as the screen is touched and 0 when
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* reporting the location where touching stopped, e.g. where the pen was
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* lifted from the screen.
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*
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* When holding the screen in landscape mode as the BIOS text output is
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* presented, x is the horizontal axis with values growing from left to
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* right and y is the vertical axis with values growing from top to
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* bottom.
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*
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* When holding the screen in portrait mode with the Sahara logo in its
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* correct position, x ist the vertical axis with values growing from
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* top to bottom and y is the horizontal axis with values growing from
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* right to left.
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*/
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#define T213_FORMAT_TOUCH_BIT 0x01
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#define T213_FORMAT_STATUS_BYTE 0x80
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#define T213_FORMAT_STATUS_MASK ~T213_FORMAT_TOUCH_BIT
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/*
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* On my Sahara Touch-IT 213 I have observed x values from 0 to 0x7f0
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* and y values from 0x1d to 0x7e9, so the actual measurement is
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* probably done with an 11 bit precision.
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*/
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#define T213_MIN_XC 0
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#define T213_MAX_XC 0x07ff
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#define T213_MIN_YC 0
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#define T213_MAX_YC 0x07ff
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/*
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* Per-touchscreen data.
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*/
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struct touchit213 {
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struct input_dev *dev;
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struct serio *serio;
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int idx;
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unsigned char csum;
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unsigned char data[5];
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char phys[32];
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};
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static irqreturn_t touchit213_interrupt(struct serio *serio,
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unsigned char data, unsigned int flags)
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{
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struct touchit213 *touchit213 = serio_get_drvdata(serio);
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struct input_dev *dev = touchit213->dev;
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touchit213->data[touchit213->idx] = data;
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switch (touchit213->idx++) {
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case 0:
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if ((touchit213->data[0] & T213_FORMAT_STATUS_MASK) !=
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T213_FORMAT_STATUS_BYTE) {
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pr_debug("unsynchronized data: 0x%02x\n", data);
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touchit213->idx = 0;
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}
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break;
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case 4:
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touchit213->idx = 0;
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input_report_abs(dev, ABS_X,
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(touchit213->data[1] << 7) | touchit213->data[2]);
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input_report_abs(dev, ABS_Y,
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(touchit213->data[3] << 7) | touchit213->data[4]);
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input_report_key(dev, BTN_TOUCH,
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touchit213->data[0] & T213_FORMAT_TOUCH_BIT);
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input_sync(dev);
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break;
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}
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return IRQ_HANDLED;
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}
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/*
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* touchit213_disconnect() is the opposite of touchit213_connect()
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*/
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static void touchit213_disconnect(struct serio *serio)
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{
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struct touchit213 *touchit213 = serio_get_drvdata(serio);
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input_get_device(touchit213->dev);
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input_unregister_device(touchit213->dev);
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serio_close(serio);
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serio_set_drvdata(serio, NULL);
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input_put_device(touchit213->dev);
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kfree(touchit213);
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}
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/*
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* touchit213_connect() is the routine that is called when someone adds a
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* new serio device that supports the Touchright protocol and registers it as
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* an input device.
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*/
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static int touchit213_connect(struct serio *serio, struct serio_driver *drv)
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{
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struct touchit213 *touchit213;
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struct input_dev *input_dev;
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int err;
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touchit213 = kzalloc(sizeof(struct touchit213), GFP_KERNEL);
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input_dev = input_allocate_device();
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if (!touchit213 || !input_dev) {
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err = -ENOMEM;
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goto fail1;
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}
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touchit213->serio = serio;
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touchit213->dev = input_dev;
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snprintf(touchit213->phys, sizeof(touchit213->phys),
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"%s/input0", serio->phys);
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input_dev->name = "Sahara Touch-iT213 Serial TouchScreen";
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input_dev->phys = touchit213->phys;
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input_dev->id.bustype = BUS_RS232;
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input_dev->id.vendor = SERIO_TOUCHIT213;
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input_dev->id.product = 0;
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input_dev->id.version = 0x0100;
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input_dev->dev.parent = &serio->dev;
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input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
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input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
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input_set_abs_params(touchit213->dev, ABS_X,
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T213_MIN_XC, T213_MAX_XC, 0, 0);
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input_set_abs_params(touchit213->dev, ABS_Y,
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T213_MIN_YC, T213_MAX_YC, 0, 0);
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serio_set_drvdata(serio, touchit213);
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err = serio_open(serio, drv);
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if (err)
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goto fail2;
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err = input_register_device(touchit213->dev);
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if (err)
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goto fail3;
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return 0;
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fail3: serio_close(serio);
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fail2: serio_set_drvdata(serio, NULL);
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fail1: input_free_device(input_dev);
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kfree(touchit213);
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return err;
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}
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/*
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* The serio driver structure.
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*/
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static struct serio_device_id touchit213_serio_ids[] = {
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{
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.type = SERIO_RS232,
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.proto = SERIO_TOUCHIT213,
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.id = SERIO_ANY,
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.extra = SERIO_ANY,
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},
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{ 0 }
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};
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MODULE_DEVICE_TABLE(serio, touchit213_serio_ids);
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static struct serio_driver touchit213_drv = {
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.driver = {
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.name = "touchit213",
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},
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.description = DRIVER_DESC,
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.id_table = touchit213_serio_ids,
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.interrupt = touchit213_interrupt,
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.connect = touchit213_connect,
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.disconnect = touchit213_disconnect,
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};
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/*
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* The functions for inserting/removing us as a module.
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*/
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static int __init touchit213_init(void)
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{
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return serio_register_driver(&touchit213_drv);
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}
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static void __exit touchit213_exit(void)
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{
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serio_unregister_driver(&touchit213_drv);
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}
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module_init(touchit213_init);
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module_exit(touchit213_exit);
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@ -213,5 +213,6 @@ static inline void serio_unpin_driver(struct serio *serio)
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#define SERIO_FUJITSU 0x35
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#define SERIO_ZHENHUA 0x36
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#define SERIO_INEXIO 0x37
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#define SERIO_TOUCHIT213 0x37
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#endif
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