Vladimir 'φ-coder/phcoder' wrote: > > It could make troubles on SCSI subclass > > devices but I tried all my devices with SCSI subclass with > > ATAPI-compatible length of command and all devices are working normally > > - so I think it should be safe to use ATAPI format of commands > > universally for any subclass and I tried to "add support" for most of > > USB MS subclasses - in fact I only extended one condition in usbms.c... > > I did not testing devices subclasses RBC, UFI and MMC-2 - I don't have > > such devices - can do somebody such tests ? > > > Is MMC-2 subclass of cardreaders?
Hi, I think probably not. Full description of subcalss is "SFF-8020i, MMC-2 (ATAPI)" and comment is that such subclass is used mainly by CD/DVD. For example here http://www.ata-atapi.com/scsi.html is written: "If you are looking for the SCSI command set used by ATAPI CD-ROM or DVD devices then you should go to the T10 site and find the MMC or MMC-2 documents. Please note that the old SFF-8020 (INF-8020) document is now obsolete. SFF-8020 (INF-8020) has been replaced by the T13 ATA/ATAPI-4 standard (for the interface and command protocol descriptions) and by the T10 MMC or MMC-2 standards (for the SCSI command set). The SCSI standards are published by ANSI NCITS Technical Committee 10, or just T10: T10 - Technical Committee 10 " Unfortunately you should be a member of T10 to get access to many documents, MMC-2 is one of them... But there is free access for example to some implementation notes on T10: http://www.t10.org/ftp/t10/document.97/97-118r0.pdf http://www.t10.org/ftp/t10/document.97/97-119r0.pdf > > Unfortunately, I probably cannot help You as I don't have GEODE or > > Yeeloong... I can hope only that my corrections would help You or > > inspire You in some other ways. > > > I don't think it's something deeply specific to Geode. Other than having > Geode MSR instead of PCI configuration space it's normal OHCI. Actually > with your patch when you forgot to power device up it resulted in > similar symptoms on PCI OHCI controller. OHCI specification mentions > different ways to configure power settings. I guess geode defaults to > another mode than most controllers do. Or perhaps I need to somehow > enable ports. > > OHCI specification is little bit unclear in the case of root hub port registers - some values are there marked "Implementation Specific" and there is not clear for me if any OHCI HC must support any combination of powering or not. Best regards Ales _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel
