Is there anything special I need to do to get a control_msg request to work
with a kernel driver, maybe some kind of special initialization before? I have
a working libusb driver and am trying to port it to the kernel. I have been
trying to learn how to write a usb driver by looking at se401.c.
Thanks,
Chris Cheney
KERNEL:
I send a request like this:
vicam_sndctrl(1, vicam, VICAM_REQ_VENDOR, 0, firmware1, sizeof(firmware1));
and get:
kernel: vicam.c: urb 1
kernel: usb-uhci.c: interrupt, status 28, frame# 555
kernel: usb_control/bulk_msg: timeout
LIBUSB:
i do this:
n=usb_control_msg(st_handle,0x41,0xff,0,0,firmware1,sizeof(firmware1),CTRL_TIMEOUT);
which works just fine.
------
function used from se401.c
static int vicam_sndctrl(int set, struct usb_vicam *vicam, unsigned short req,
unsigned short value, unsigned char *cp, int size)
{
return usb_control_msg ( vicam->udev, set ? usb_sndctrlpipe(vicam->udev, 0) :
usb_rcvctrlpipe(vicam->udev, 0), req, (set ? USB_DIR_OUT : USB_DIR_IN) |
USB_TYPE_VENDOR | USB_RECIP_DEVICE, value, 0, cp, size, HZ);
}
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