Hi Greg KH,
I am using usb gadget printer driver for iMX25(ARM9)
board and the kernel version is 2.6.31, now i have made an application
which will open the driver from user space as "/dev/g_printer"
whenever i connect the usb gadget to the host i need to detect from my
application. I have made an switch case in ioctl function of
/driver/usb/gadget/printer.c as
switch (code) {
case GADGET_GET_PRINTER_STATUS:
status = (int)dev->printer_status;
break;
case GADGET_SET_PRINTER_STATUS:
dev->printer_status = (u8)arg;
break;
case ATTACHED:
PrintMessage("ioctl:Before usb_gadget_vbus_draw\n");
status = usb_gadget_connect(dev->gadget);
PrintMessage("ioctl:After usb_gadget_vbus_draw\n");
break;
default:
/* could not handle ioctl */
DBG(dev, "IntelliBar printer_ioctl: ERROR
cmd=0x%4.4xis not supported\n",
code);
status = -ENOTTY;
}
in my application i have used the driver ioctl as
static int attach;
attach = ioctl(fd[0].fd, ATTACHED);
printf("Attached=%d\n", attach);
if(attach < 0)
{
printf("Printer Dettached\n");
}
else
{
printf("Printer Attached\n");
}
Now the question is whenever i connect the usb gadget to host the case
ATTACHED is called from driver and it should return zero on success
and -ve on error, when i will get attach = 0 always even if i connect
to host or not.
How to resolve this issue. Please help me asap.
--
Thanks & Regards,
SANDEEP G R,
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