[Bluez-devel] Switching the Logitech-Hub

[Alexander Holler <holler@ahsoftware.de>]

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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