Subject: Re: [PATCH v3] mtd/nand : workaround for Freescale FCM to support large-page Nand chip

From: Scott Wood <[email-masked]>
Date: Mon, 22 Aug 2011 11:19:40 -0500

On 08/22/2011 11:13 AM, Matthieu CASTET wrote:
> Scott Wood a écrit :
>> To eliminate it we'd need to do an extra data transfer without reissuing
>> the command, which Shuo was unable to get to work.
>>
> That's weird because our controller seems quite flexible [1].
> 
> Something like that should work ?
> 
>             out_be32(&lbc->fir,
>                      (FIR_OP_CM2 << FIR_OP0_SHIFT) |
>                      (FIR_OP_CA  << FIR_OP1_SHIFT) |
>                      (FIR_OP_PA  << FIR_OP2_SHIFT) |
>                      (FIR_OP_WB  << FIR_OP3_SHIFT));
> refill FCM buffer with next 2k data
> 
>             out_be32(&lbc->fir,
>                      (FIR_OP_WB  << FIR_OP3_SHIFT) |
>                      (FIR_OP_CM3 << FIR_OP4_SHIFT) |
>                      (FIR_OP_CW1 << FIR_OP5_SHIFT) |
>                      (FIR_OP_RS  << FIR_OP6_SHIFT));

Something like that is what I originally suggested, but Shuo said it
didn't work (even in theory, it requires a CE-don't-care NAND chip,
since bus atomicity is broken).

Shuo, what specifically did you try, and what did you see happen?

-Scott