On Thu, Oct 18, 2012 at 6:51 AM, Marek Vasut marex@denx.de wrote:
Dear Huang Shijie,
于 2012年10月18日 16:49, Marek Vasut 写道:
Dear Huang Shijie,
于 2012年10月18日 16:16, Marek Vasut 写道:
So we can't stream data from the chip? About time to adjust the MTD framework to allow that. Maybe implement a command queue?
IMHO, it's not possible. Because the READ-PAGE(00h-30h) command needs to check the busy status which means we have to stop in the middle, so we can not chain the all the read-pages DMA commands.
Can the DMA not branch?
it's too complicated to the MTD layer, as well as the gpmi driver.
Can you please elaborate ?
could you read the nand spec about how to read a page out with the READ-PAGE(00-30) command, and tell me how to make the DMA branch? I really have no idea about how to make the DMA branch.
thanks Huang Shijie .
Best regards, Marek Vasut