[Bluez-devel] Switching the Logitech-Hub

[Bluez-devel] Switching the Logitech-Hub

[Alexander Holler]

Hi,

I've now find a way to use hiddev for sending a report to the hub.

Using the patch from

http://sourceforge.net/mailarchive/forum.php?thread_id=3581364&forum_id=5398

the following works for sending reports:

----------------
int main(void)
{
  char switch_sequence[] = {
    0xff, 0x81, 0x80, 0x00, 0x00, 0x00
  };
  struct hiddev_report_info rinfo;
  struct hiddev_usage_ref uref;
  struct hiddev_field_info finfo;
  int fd;
  if ((fd = open("/dev/usb/hid/hiddev0", O_RDONLY)) <= 0) { // I have only 
one hiddev
    printf("error opening device\n");
    return 1;
  }
  int rc=ioctl(fd, HIDIOCINITREPORT,0);
  printf("rc: %d\n", rc);
  if(rc)
    perror(NULL);
  int i;
  for(i=0; i< 6; ++i ) {
    memset( &uref, 0, sizeof(uref) );
    uref.report_type = HID_REPORT_TYPE_OUTPUT;
    uref.report_id = 0x10;
    uref.field_index = 0;
    uref.usage_index = i ;
    uref.usage_code=0xff000001; // not used, just as beautifier
    uref.value = switch_sequence[i];
    rc=ioctl(fd, HIDIOCSUSAGE, &uref);
    printf("rc: %d\n", rc);
    if(rc)
      perror(NULL);
  }
  memset( &rinfo, 0, sizeof(rinfo) );
  rinfo.report_type = HID_REPORT_TYPE_OUTPUT;
  rinfo.report_id = 0x10;
  rinfo.num_fields = 1;
  rc=ioctl(fd, HIDIOCSREPORT, &rinfo);
  printf("rc: %d\n", rc);
  if(rc)
    perror(NULL);
  close(fd);
  return 0;
}
----------------

But the hub doesn't switch.

Using some debug-statements in hid-core.c, I see the following:

hid_submit_report
hid_submit_ctrl: 04 00 00 00 00 00 00
hid_submit_report
hid_submit_ctrl: 10 ffff ff81 ff80 00 00 00

This sequence will get send everytime I send one report using the above 
program. The first ctrl comes from HIDIOCINITREPORT. I don't now if calling 
the init is need, but I assume it doesn't break things.

Because the hub doesn't switch, it seems the report used (10 ff 81 80 00 00 
00) is wrong.

I will test some other reports (or sequences of them), I could find in my 
windows-log.

Regards,

Alexander



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Re: [Bluez-devel] Switching the Logitech-Hub

[Marcel Holtmann]

Hi Alexander,

> I've now find a way to use hiddev for sending a report to the hub.
> 
> Using the patch from
> 
> http://sourceforge.net/mailarchive/forum.php?thread_id=3581364&forum_id=5398

do he got any comments about his patch? Do this patch break any other
USB HID devices?

Regards

Marcel




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Re: [Bluez-devel] Switching the Logitech-Hub

[Alexander Holler]

Hi Marcel,

--On Sonntag, Januar 04, 2004 11:40:48 +0100 Marcel Holtmann 
<marcel@holtmann.org> wrote:

> do he got any comments about his patch? Do this patch break any other
> USB HID devices?

I've got no comments, it's not surprising, it's just 8 hours on this list. 
But I also have looked through the sources and up to now, I don't see, why 
this should break other devices. And it seems there are some more people 
with the same problem. e.g.
http://sourceforge.net/mailarchive/forum.php?thread_id=3345181&forum_id=5398

I assume there are also some more who are wondering why sending reports 
using hiddev doesn't work. But not everyone will find the reason. Without 
your help, I wouldn't have find it too.

As the author from the patch writes, it doesn't seem to interrest anyone 
from the usb-devels.

Regards,

Alexander



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Re: [Bluez-devel] Switching the Logitech-Hub

[Marcel Holtmann]

Hi Alexander,

> I've got no comments, it's not surprising, it's just 8 hours on this list. 
> But I also have looked through the sources and up to now, I don't see, why 
> this should break other devices. And it seems there are some more people 
> with the same problem. e.g.
> http://sourceforge.net/mailarchive/forum.php?thread_id=3345181&forum_id=5398
> 
> I assume there are also some more who are wondering why sending reports 
> using hiddev doesn't work. But not everyone will find the reason. Without 
> your help, I wouldn't have find it too.
> 
> As the author from the patch writes, it doesn't seem to interrest anyone 
> from the usb-devels.

it is a good idea to repost a clean patch for 2.4 and 2.6 to the Linux
USB developer mailing list. Turn the attention to the problem.

Regards

Marcel




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