touchscreen wirh 2.6.26

touchscreen wirh 2.6.26

[Alex Custov]

Hello.

I have Acer T230H on Debian Lenny with 2.6.26.8 manually complied
kernel. The problem is that this is a multitouch monitor and it seems
that it doesn't work at all (even single touches). All things under
"Drivers => Input device support => Touchscreens" are enabled in
kernel (as modules). Is this type of monitor supported, or I should
upgrade to a newer kernel? Thanks.

Please CC any comments.

Re: touchscreen wirh 2.6.26

[Jiri Kosina]

On Wed, 25 Nov 2009, Alex Custov wrote:

> I have Acer T230H on Debian Lenny with 2.6.26.8 manually complied 
> kernel. The problem is that this is a multitouch monitor and it seems 
> that it doesn't work at all (even single touches). All things under 
> "Drivers => Input device support => Touchscreens" are enabled in kernel 
> (as modules). Is this type of monitor supported, or I should upgrade to 
> a newer kernel? Thanks.

How is the touchscreen conntected to system? Is it USB? If so, what is the 
vendor and product ID? (lsusb will tell).

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

Re: touchscreen wirh 2.6.26

[Alex Custov]

2009/11/27 Jiri Kosina <jkosina@suse.cz>:
> On Wed, 25 Nov 2009, Alex Custov wrote:
>
>> I have Acer T230H on Debian Lenny with 2.6.26.8 manually complied
>> kernel. The problem is that this is a multitouch monitor and it seems
>> that it doesn't work at all (even single touches). All things under
>> "Drivers => Input device support => Touchscreens" are enabled in kernel
>> (as modules). Is this type of monitor supported, or I should upgrade to
>> a newer kernel? Thanks.
>
> How is the touchscreen conntected to system? Is it USB? If so, what is the
> vendor and product ID? (lsusb will tell).
>
> --
> Jiri Kosina
> SUSE Labs, Novell Inc.
>
>

Hi. Thanks for answer. I've already found the /dev device it has - it
is /dev/usb/hiddev0. Yes, it is USB connected. I did "cat
/dev/usb/hiddev0" and touched some points on the screen, it seems that
it works (I got some binary data from 'cat'). Now I will try to add
the corresponding section to the xorg.conf to let it work in X.

--

Re: touchscreen wirh 2.6.26

[Jiri Kosina]

On Fri, 27 Nov 2009, Alex Custov wrote:

> >> I have Acer T230H on Debian Lenny with 2.6.26.8 manually complied
> >> kernel. The problem is that this is a multitouch monitor and it seems
> >> that it doesn't work at all (even single touches). All things under
> >> "Drivers => Input device support => Touchscreens" are enabled in kernel
> >> (as modules). Is this type of monitor supported, or I should upgrade to
> >> a newer kernel? Thanks.
> >
> > How is the touchscreen conntected to system? Is it USB? If so, what is the
> > vendor and product ID? (lsusb will tell).
> 
> Hi. Thanks for answer. I've already found the /dev device it has - it
> is /dev/usb/hiddev0. Yes, it is USB connected. I did "cat
> /dev/usb/hiddev0" and touched some points on the screen, it seems that
> it works (I got some binary data from 'cat'). Now I will try to add
> the corresponding section to the xorg.conf to let it work in X.

It might not be that trivial -- /dev/usb/hiddev0 gives you only 
more-or-less raw HID data, but they have still to be interpreted somehow 
to make sense.

If the device is implementing some vendor-specific (or device-specific) 
protocol, then the data you see coming through hiddev0 might not be useful 
at all directly in X.

Repeating from my previous mail -- please provide the idVendor/idProduct 
(found by lsusb -v) for this device. It might be supported in later 
kernels, but without this information, it's impossible to tell.

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

Re: touchscreen wirh 2.6.26

[Alex Custov]

2009/11/27 Jiri Kosina <jkosina@suse.cz>:
> On Fri, 27 Nov 2009, Alex Custov wrote:
>
>> >> I have Acer T230H on Debian Lenny with 2.6.26.8 manually complied
>> >> kernel. The problem is that this is a multitouch monitor and it seems
>> >> that it doesn't work at all (even single touches). All things under
>> >> "Drivers => Input device support => Touchscreens" are enabled in kernel
>> >> (as modules). Is this type of monitor supported, or I should upgrade to
>> >> a newer kernel? Thanks.
>> >
>> > How is the touchscreen conntected to system? Is it USB? If so, what is the
>> > vendor and product ID? (lsusb will tell).
>>
>> Hi. Thanks for answer. I've already found the /dev device it has - it
>> is /dev/usb/hiddev0. Yes, it is USB connected. I did "cat
>> /dev/usb/hiddev0" and touched some points on the screen, it seems that
>> it works (I got some binary data from 'cat'). Now I will try to add
>> the corresponding section to the xorg.conf to let it work in X.
>
> It might not be that trivial -- /dev/usb/hiddev0 gives you only
> more-or-less raw HID data, but they have still to be interpreted somehow
> to make sense.
>
> If the device is implementing some vendor-specific (or device-specific)
> protocol, then the data you see coming through hiddev0 might not be useful
> at all directly in X.
>
> Repeating from my previous mail -- please provide the idVendor/idProduct
> (found by lsusb -v) for this device. It might be supported in later
> kernels, but without this information, it's impossible to tell.
>
> --
> Jiri Kosina
> SUSE Labs, Novell Inc.
>

Here you are:

Bus 004 Device 002: ID 0408:3000 Quanta Computer, Inc.
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x0408 Quanta Computer, Inc.
  idProduct          0x3000
  bcdDevice            0.00
  iManufacturer           1 Acer
  iProduct                2 T230H
  iSerial                 0
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           34
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      0 No Subclass
      bInterfaceProtocol      0 None
      iInterface              0
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.10
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength     210
         Report Descriptors:
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               8
Device Status:     0x0000
  (Bus Powered)

--

Re: touchscreen wirh 2.6.26

[Jiri Kosina]

On Fri, 27 Nov 2009, Alex Custov wrote:

> Bus 004 Device 002: ID 0408:3000 Quanta Computer, Inc.
> Device Descriptor:
>   bLength                18
>   bDescriptorType         1
>   bcdUSB               1.10
>   bDeviceClass            0 (Defined at Interface level)
>   bDeviceSubClass         0
>   bDeviceProtocol         0
>   bMaxPacketSize0        64
>   idVendor           0x0408 Quanta Computer, Inc.
>   idProduct          0x3000

Unfortunately, this touchscreen is not (yet) neither supported by 
usbtouchscreen kernel driver, nor is it apparently HID standard compliant, 
so HID driver can't do much with it as well.

You will have to reverse-engineer the data protocol the touchscreen is 
sending. It's usually quite easy, in cases in which the device doesn't 
require complex initialization before it can become functional.

-- 
Jiri Kosina
SUSE Labs, Novell Inc.

Re: touchscreen wirh 2.6.26

[Tamási János]

[-- Attachment #1: Type: text/plain, Size: 1089 bytes --]

Hi!

I wrote a small (and really ugly) uinput driver to this device. I hope 
this helps somebody to write a proper driver for this touchscreen.


2009-11-28 00:30 keltezéssel, Jiri Kosina írta:
> On Fri, 27 Nov 2009, Alex Custov wrote:
>
>    
>> Bus 004 Device 002: ID 0408:3000 Quanta Computer, Inc.
>> Device Descriptor:
>>    bLength                18
>>    bDescriptorType         1
>>    bcdUSB               1.10
>>    bDeviceClass            0 (Defined at Interface level)
>>    bDeviceSubClass         0
>>    bDeviceProtocol         0
>>    bMaxPacketSize0        64
>>    idVendor           0x0408 Quanta Computer, Inc.
>>    idProduct          0x3000
>>      
> Unfortunately, this touchscreen is not (yet) neither supported by
> usbtouchscreen kernel driver, nor is it apparently HID standard compliant,
> so HID driver can't do much with it as well.
>
> You will have to reverse-engineer the data protocol the touchscreen is
> sending. It's usually quite easy, in cases in which the device doesn't
> require complex initialization before it can become functional.
>
>    


[-- Attachment #2: acer-t230H.c --]
[-- Type: text/plain, Size: 3602 bytes --]

// uinput.c
#include <string.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <linux/input.h>
#include <linux/uinput.h>
#include <stdio.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
/*
 * Globals 
 */
static int      uinp_fd = -1;
struct uinput_user_dev uinp;	// uInput device structure
struct input_event event;	// Input device structure

/*
 * Setup the uinput device 
 */
int setup_uinput_device() {
    // Temporary variable
    int             i = 0;

    // Open the input device
    uinp_fd = open("/dev/input/uinput", O_WRONLY | O_NDELAY);
    if (&uinp_fd == NULL) {
		printf("Unable to open /dev/input/uinput\n");
		return -1;
    }
    memset(&uinp, 0, sizeof(uinp));	// Intialize the uInput device to NULL
    strncpy(uinp.name, "Acer T230H", UINPUT_MAX_NAME_SIZE);
    uinp.id.version = 4;
    uinp.id.bustype = BUS_USB;
    uinp.absmax[ABS_X] = 1920+1440; // i have another monitor connected;
    uinp.absmin[ABS_X] = 0;
    uinp.absfuzz[ABS_X] = 3;
    uinp.absmin[ABS_X] = 0;

    uinp.absmax[ABS_Y] = 1080;
    uinp.absmin[ABS_Y] = 0;
    uinp.absfuzz[ABS_Y] = 3;
    uinp.absmin[ABS_Y] = 0;

    // Setup the uinput device
    ioctl(uinp_fd, UI_SET_EVBIT, EV_KEY);
    ioctl(uinp_fd, UI_SET_EVBIT, EV_ABS);
    ioctl(uinp_fd, UI_SET_ABSBIT, ABS_X);
    ioctl(uinp_fd, UI_SET_ABSBIT, ABS_Y);
    ioctl(uinp_fd, UI_SET_KEYBIT, BTN_LEFT);

    /*
     * Create input device into input sub-system 
     */
    write(uinp_fd, &uinp, sizeof(uinp));
    if (ioctl(uinp_fd, UI_DEV_CREATE)) {
		printf("Unable to create UINPUT device.\n");
		return -1;
    }
    return 1;
}

void pukk() {
    int             fd;
    unsigned int    x,
                    y,
                    xx,
                    yy;
    unsigned char   buf[30];

    fd = open("/dev/hidraw6", O_RDONLY);
    while (1) {
		read(fd, buf, sizeof(buf));
		x = buf[4] + (unsigned int) buf[5] * 256;
		y = buf[6] + (unsigned int) buf[7] * 256;
		xx = buf[10] + (unsigned int) buf[11] * 256;
		yy = buf[12] + (unsigned int) buf[13] * 256;

		// set x & y
		memset(&event, 0, sizeof(event));
		gettimeofday(&event.time, NULL);
		event.type = EV_ABS;
		event.code = ABS_X;
		event.value = x + 1440; // a have another monitor connected :)
		write(uinp_fd, &event, sizeof(event));
		event.type = EV_ABS;
		event.code = ABS_Y;
		event.value = y;
		write(uinp_fd, &event, sizeof(event));
		event.type = EV_SYN;
		event.code = SYN_REPORT;
		event.value = 0;
		write(uinp_fd, &event, sizeof(event));

		if (buf[2] == 7) {	// BTN1 pressed
		    memset(&event, 0, sizeof(event));
		    gettimeofday(&event.time, NULL);
		    event.type = EV_KEY;
		    event.code = BTN_LEFT;
		    event.value = 1;
		    write(uinp_fd, &event, sizeof(event));
		    event.type = EV_SYN;
		    event.code = SYN_REPORT;
		    event.value = 0;
		    write(uinp_fd, &event, sizeof(event));
		}

		if (buf[2] == 4) {	// BTN1 released
		    memset(&event, 0, sizeof(event));
		    gettimeofday(&event.time, NULL);
		    event.type = EV_KEY;
		    event.code = BTN_LEFT;
		    event.value = 0;
		    write(uinp_fd, &event, sizeof(event));
		    event.type = EV_SYN;
		    event.code = SYN_REPORT;
		    event.value = 0;
		    write(uinp_fd, &event, sizeof(event));
		}

		printf("\n%ux%u %ux%u [%u]\n", x, y, xx, yy, buf[2]);
    }
    close(fd);
}

int main() {
    // Return an error if device not found.
    if (setup_uinput_device() < 0) {
		printf("Unable to find uinput device\n");
		return -1;
    }
    pukk();
    ioctl(uinp_fd, UI_DEV_DESTROY);
    close(uinp_fd);
    return 0;
}