Re: MMC/SDIO sub-system: block mode versus byte mode

2007-11-22 Thread Pierre Ossman
On Thu, 22 Nov 2007 12:15:11 + Dean Jenkins <[EMAIL PROTECTED]> wrote: > Hi Pierre, > > Thanks for information. > > My card does support 256 byte transfers in byte mode but I was expecting > block mode to be used as block mode is supported by the card. Indeed, > sdio_io_rw_ext_helper() check

Re: MMC/SDIO sub-system: block mode versus byte mode

2007-11-22 Thread Dean Jenkins
Hi Pierre, Thanks for information. My card does support 256 byte transfers in byte mode but I was expecting block mode to be used as block mode is supported by the card. Indeed, sdio_io_rw_ext_helper() checks for support of block mode before using byte mode. eg. block mode is preferred over byte

Re: MMC/SDIO sub-system: block mode versus byte mode

2007-11-22 Thread Pierre Ossman
On Thu, 22 Nov 2007 10:41:43 + Dean Jenkins <[EMAIL PROTECTED]> wrote: > Hi Pierre, > > I've been checking my SDIO CMD53 data transfers and I notice the > following: > > block size = 256 bytes for my SDIO card. > > transfers of 256 bytes uses byte mode ( I expected block mode ) > transfers

MMC/SDIO sub-system: block mode versus byte mode

2007-11-22 Thread Dean Jenkins
Hi Pierre, I've been checking my SDIO CMD53 data transfers and I notice the following: block size = 256 bytes for my SDIO card. transfers of 256 bytes uses byte mode ( I expected block mode ) transfers of 512 bytes uses block mode ( because blocks = 2 ) >From the SD spec a single block transfer