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

On 08/22/2011 11:13 AM, Matthieu CASTET wrote:

Scott Wood a =C3=A9crit :

quoted

To eliminate it we'd need to do an extra data transfer without reissui=

ng

quoted

the command, which Shuo was unable to get to work.

That's weird because our controller seems quite flexible [1].
=20
Something like that should work ?
=20
            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
=20
            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