Hans Petter Selasky wrote:
On Friday 02 May 2008, Steve Clark wrote:

Hello,

Is there any detailed documentation on the FreeBSD usb device driver api?

TIA,
Steve
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Hi,

For the usb.p4 there is a README. Else you have to look at the existing USB drivers.

--HPS


Well here is my problem. I am trying to get a sierra wireless 597 evdo usb modem to work with freebsd 6.1. The usb device when it is first plugged in has a product id of 0xfff and looks like a cdrom drive with software drivers on it for Windows. It has to have a control message sent to it
to put it in modem mode.

I sort of have it working by hacking ubsa.c to look for the sierra vendor id and product id of 0xfff in the usb_match function and return match. Then in the usb_attach code I look again for the vendor and product id of 0xfff and then send the control message to put it in modem mode.
        if ( uaa->vendor == USB_VENDOR_SIERRA && uaa->product == 0xfff )
        {
                ubsa_request_real( sc, 0x0b, 1, 0x40 );
                ucom->sc_dying = 1;
                goto error;
        }

This puts in modem mode with product id of 0x0023 which i have plugged into usbdevs and also put in ubsa.c so now I get a ucom device and can successfully run ppp. The problem I am running into now is sometime after it remove the device I will get a page fault panic in the kernel. I think it is related to the sending the control_message - something is not cleaned up when I "goto error" in the USB_ATTACH function.

I modified ubsa_reguest() to accept a request_type and called it ubsa_request_real() and then had
ubsa_request()  call ubsa_request_real as
        return (ubsa_request_real( sc, request, value, UT_WRITE_VENDOR_DEVICE 
));

Now that I looked up what UT_WRITE_VENDOR_DEVICE is I guess this was an unnecessary step.

Any ideas how this should really be handled - That sending the control message to put the device in
modem mode?

Thanks,
Steve


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