Re: Problem adding a new device using an initializer

[Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>]

On Fri, 14 Dec 2007, Rui Santos wrote:

> Hi all,
> 
> I currently own a USB 3G mobile device manufactured under the name ZTE
> MF620.
> At the same time I also own a Huawei USB E220 device.
> 
> On 2.6.24-rc5, the Huawei device uses an initializer to switch the
> device from a usb-storage to a multi-port mode, that was previously
> being done by a userspace application.
> I was trying to do the same with the ZTE device, but I'm getting
> frustrated. This same ZTE device has a userspace application that also
> switches it to a multi-port mode.
> Can anyone tell me what I'm doing wrong ?
> 
> This is the userspace program ( includes libusb ):
...
> ret = usb_control_msg(devh, USB_TYPE_CLASS + USB_RECIP_INTERFACE +
> USB_ENDPOINT_IN, 0x00000fe, 0x0000000, 0x0000000, buf, 0x0000001, 1000);
...
> This is the Kernel initializer I'm trying to add at
> drivers/usb/storage/initializers.c that is not working:
> 
> int usb_stor_zte_mf620_init(struct us_data *us)
> {
>     int result;
> 
>     us->iobuf[0] = 0x1;
>     result = usb_stor_control_msg(us, us->send_ctrl_pipe,
>                       0xFE,
>                       USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
>                       0x0, 0x0, us->iobuf, 0x1, 1000);

If this is supposed to be an IN transfer (judging by the
USB_ENDPOINT_IN and USB_DIR_IN constants) then you should use 
us->recv_ctrl_pipe instead of us->send_ctrl_pipe.

Alan Stern


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