Re: Usb serial gadget driver bug?
Alan Stern <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Thu, 26 Jul 2007 [email protected] wrote: > 1. SET_LINE_CODING handling in gs_setup_class() copies req->buf to its > port_line_coding struct but data stage has not been reached yet. Have you considered mentioning this to the author or maintainer of that driver? > 2. generic question on setup handling by gadget drivers: You mean Control transfer handling. Your question is about the Status stage, not the Setup stage. > For setup-data-ack sequence, is ack to be generated by the controller > driver always? No; only if the request is valid and is carried out successfully. > What if it is data-out and the settings cannot be > supported by the gadget for whatever reason, how does it inform the > controller driver? You can set the Halt feature on ep0 in the data-out completion routine. (See 8.5.3.1 and Table 8-7 in the USB 2.0 spec.) Some controller drivers might not support this, though. Alan Stern ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel