Messages in this thread |  | | | Date | Sat, 7 Aug 2010 06:15:55 -0700 (PDT) | | From | Alex Dubov <> | | Subject | Re: [PATCH 2/2] MEMSTICK: Add driver for Ricoh R5C592 Card reader. |
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> > > > > > > > > > > > > > That's how its called in the > spec. > > > > > > > Sectors can be larger than > 512b on > > > Pro-HG sticks, and > > > > > > there's additional > > > > > > > TPC_READ/WRITE_QUAD_DATA > which operates > > > on larger > > > > > > quantities. > > > > > > But not on ordinary PRO, right? > > > > > > > > > > Pro sectors are normally 512 bytes. > > > > > > > > > > > > > > > > > Small question, can I use Pro-HG > stick in my > > > reader that is > > > > > > designed for > > > > > > Standard/PRO only? Does your > subsystem > > > support it? > > > > > > > > > > It should work. It works for me on TI, > which has > > > no 8b mode either. > > > > In that case, is there an upper limit on > sector size? > > > Also, you don't use the MS_TPC_READ_QUAD_DATA at > all. > > > So mspro_blk.c won't work with >512 > bytes/sector disk? > > > Or there is some compatibility? > > > > > > > The code can work with arbitrarily sized pages, 512b > > value is not hard coded. All that is needed is to > slightly alter > > h_mspro_block_transfer_data function, given, of > course, that adapters > > support longer transfer > > No, I mean if I go and buy memstick PRO HG, that has > > 512 bytes/sector, > will it work with current code? > > Btw, there is currently no way of telling core about > maximum transfer > length. > Here absolute maximum is 1024 (number of bit that _might_ > hold TPC > length), and FIFO size is 512 bytes (maybe its possible to > use fifo > twice) >
On TI adapters, FIFO can be reused and DMA restarted. Jmicron adapters are funny beasts, but their team is keen to support MSpro-HG, so at some point it will be fully possible, though, probably, not with every version of the chipset.
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