On Thu, Oct 18, 2012 at 6:51 AM, Marek Vasut [off-list ref] wrote:

Dear Huang Shijie,

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? 2012?10?18? 16:49, Marek Vasut ??:

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Dear Huang Shijie,

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? 2012?10?18? 16:16, Marek Vasut ??:

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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