Messages in this thread | | | Date | Thu, 18 Oct 2012 11:11:15 -0400 | Subject | Re: [PATCH] dma: add new DMA control commands | From | Huang Shijie <> |
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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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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