"Gururaja Hebbar K R" <[EMAIL PROTECTED]> wrote: > Hi, > > I need few clarification regarding mmc csd structure declaration. I was > taking Atmel mci as reference. > > In ProductManualSDCardv2.2.pdf @ page 34 & ProdManualSDCardv1.9[1].pdf @ page > 39, says > > ... > ... > ... > C_SIZE_MULT 3 bit width > ERASE_BLK_EN 1 bit width > SECTOR_SIZE 7 bit width > WP_GRP_SIZE 7 bit width > WP_GRP_ENABLE 1 bit width
This seems to correspond with the SD Memory Card spec v1.01. > But in mmc.h file inside u-boot-1.3.4\include\asm-avr32\arch-at32ap700x. > > Here, inside structure mmc_csd @ line > > ... > ... > ... > c_size_mult:3 > sector_size:5 > erase_grp_size:5 > wp_grp_size:5 > wp_grp_enable:1 And this corresponds with the MMC spec. > So my doubt is, Shouldn't erase_grp_size come before sector size. No. But sometimes, erase_grp_size just isn't there at all, and you have a 1-bit flag right before sector_size instead. Currently, these values aren't actually used by u-boot, but I guess ideally, we should either read them correctly or not read them at all. Haavard _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
