libusb10: libusb_bulk_transfer returns LIBUSB_ERROR_OTHER caused by USB_FS_OPEN ioctl in ugen20_tr_open

[Hans Petter Selasky]

On Tuesday 13 July 2010 23:40:43 Peer Stritzinger wrote:
> Hi,
> 
> with the setup from my post of yesterday I'm trying IN transfers with
> libusb 1.0 and now I'm a bit stuck.
> 
> In essence I'm doing:
> 
>   cnt = libusb_get_device_list(NULL, &list);
> 
>   ... find device -> now in found
> 
>   if (found) {
>     libusb_device_handle *handle;
>     ...
>     rv = libusb_open(found, &handle);
>     trans_len = 0;
>     rv = libusb_bulk_transfer(handle, ep, buf, NBUF, &trans_len, 0);
> 
> 
> What I get is rv -> LIBUSB_ERROR_OTHER to get closer to re reason for
> this I debugged the last call into libusb
> 
> The error return is caused in ugen20_tr_open():
> 
>    ioctl(xfer->pdev->file, USB_FS_OPEN, &temp)
> 
>    returns != 0, errno -> EINVAL
> 
> Params to this ioctl are:
> 
> (gdb) p temp
> $1 = {max_bufsize = 16384, max_frames = 1, max_packet_length = 0,
>   dev_index = 0 '\0', ep_index = 24 '\030', ep_no = 6 '\006'}
> 
> (gdb) p *xfer
> $2 = {pdev = 0x282033c0, callback = 0x28094190 <libusb10_bulk_intr_proxy>,
>   priv_sc0 = 0x282033c0, priv_sc1 = 0x28221060, ppBuffer = 0x2822208c,
>   pLength = 0x28222088, maxTotalLength = 0, maxFrames = 1, nFrames = 0,
>   aFrames = 0, timeout = 0, timeComplete = 0, trIndex = 24, maxPacketLen =
>  0, flags = 0 '\0', status = 0 '\0', is_opened = 0 '\0', is_pending = 0
>  '\0', is_cancel = 0 '\0', is_draining = 0 '\0', is_restart = 0 '\0'}
> (gdb) p *xfer->pdev
> $3 = {ddesc = {LIBUSB20_DEVICE_DESC_FORMAT = 0x2809abd4, bLength = 18
>  '\022', bDescriptorType = 1 '\001', bcdUSB = 512, bDeviceClass = 0 '\0',
>  bDeviceSubClass = 0 '\0', bDeviceProtocol = 0 '\0',
>     bMaxPacketSize0 = 64 '@', idVendor = 1133, idProduct = 49177,
>     bcdDevice = 0, iManufacturer = 1 '\001', iProduct = 2 '\002',
>     iSerialNumber = 0 '\0', bNumConfigurations = 1 '\001'}, session_data =
>  { session_data = 1731721030, tv = {tv_sec = 1731721030, tv_nsec = 0},
>  plugtime = 1731721030}, dev_entry = {tqe_next = 0x0,
>     tqe_prev = 0x28202030}, methods = 0x2809aac0, beMethods = 0x2809aa80,
>   pTransfer = 0x28209c00, privBeData = 0x28215300, privLuData = 0x28207100,
>   claimed_interface = 0 '\0', file = 12, file_ctrl = 11, debug = 0,
>   nTransfer = 64, bus_number = 3 '\003', device_address = 2 '\002',
>   usb_mode = 0 '\0', usb_speed = 3 '\003', is_opened = 1 '\001',
>   usb_desc = "ugen3.2: <CY7C68001 Cypress> at usbus3", '\0' <repeats 57
>  times>}
> 
> BTW usb_desc is showing the right device.
> 
> Any suggestions?

IN endpoints must be OR'ed with 0x80. Could you dump the configuration 
descriptor of your device? Also you might need to claim the interfaces.

--HPS