[PATCH] dma: add new DMA control commands

[Marek Vasut]

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 ?

Best regards,
Marek Vasut