On 04/20/2017 09:18 AM, Ulf Hansson wrote: >> >> The Cavium hardware requires knowledge of the card addressing mode. >> We need to either restore mmc_card_blockaddr(), or create another >> way to generate the same information. You previously suggested use >> of the 'blksz' value, however, it has the same value regardless of >> the card capacity. What would you suggest? Cheers. > > Right. Can you explain what the Cavium hardware need it for? > Uffe, In Cavium's MMC controller, the DMA engine requires software to specify the addressing mode of the card. For DMA write operations, the CARD_ADDR field in the MIO_EMM_DMA register is programmed with a byte address if the media card <= 2GB. If the card is > 2GB, the address is interpreted as a 512 byte sector address. The SECTOR bit tells the controller how to interpret the address in CARD_ADDR. If set to 1, use 512 byte sector addressing, otherwise it is set to 0 and byte addressing is used. Steve -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
