usb/91546: [umodem] [patch] Nokia 6630 mobile phone does not work

[Eugene Grosbein]

Hi!

sys/dev/usb/if_cdce.c has the following comment:

/*
 * <quote>
 *  The Data Class interface of a networking device shall have a minimum
 *  of two interface settings. The first setting (the default interface
 *  setting) includes no endpoints and therefore no networking traffic is
 *  exchanged whenever the default interface setting is selected. One or
 *  more additional interface settings are used for normal operation, and
 *  therefore each includes a pair of endpoints (one IN, and one OUT) to
 *  exchange network traffic. Select an alternate interface setting to
 *  initialize the network aspects of the device and to enable the
 *  exchange of network traffic.
 * </quote>
 *
 * Some devices, most notably cable modems, include interface settings
 * that have no IN or OUT endpoint, therefore loop through the list of all
 * available interface settings looking for one with both IN and OUT
 * endpoints.
 */

I've added the loop that follows this comment to umodem.c and found
that Nokia E50 returns exactly one additional interface,
e.g. usbd_get_no_alts() returns 1. And this interface description has
id->bNumEndpoints equal to zero, so there is no IN/OUT endpoint. At all.

Here I'm stuck.

Eugene Grosbein