065d601916
The altsetting was handled only for a single endpoint (per interface number), but has to be handled for each endpoint (per interface *AND* altsetting number). A multi function device (like a disk) can have multiple interfaces, all with the same interface number but varying altsetting numbers and each of these interfaces would list distict endpoint configurations. Multiple interfaces can even share some endpoints (they use the same endpoint addresses), but we still have to duplicate them for each interface+altsetting number (as they'r part of actually distict interfaces with distict endpoint configurations). It is also important to *NOT* make endpoints bi-directional (dir == Eboth) when only one direction is used in a interface/altsetting and the other direction in another. This was the case for nusb/disk with some seagate drive where endpoints where shared between the UAS and usb storage class interface (but with distict altsettings). The duplicate endpoints (as in using the same endpoint address) are chained together by a next pointer and the head is stored in Usbdev.ep[addr], where addr is the endpoint address. These Ep structures will have distinct endpoint numbers Ep.id (when they have conflicting types), but all will share the endpoint address (lower 4 bits of the endpoint number). The consequence is that all of the endpoints configuration (attributes, interval) is now stored in the Ep struct and no more Altc struct is present. A pointer to the Ep struct has to be passed to openep() for it to configure the endpoint. For the Iface struct, we will now create multiple of them: one for each interface *AND* altsetting nunber, chained together on a next pointer and the head being stored in conf->iface[ifaceid]. -- cinap |
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