Hello,
mdalam@xxxxxxxxxxxxxx wrote on Fri, 29 Jan 2021 03:18:46 +0530:
On 2021-01-14 21:23, Miquel Raynal wrote:
> Hello,
>
> Md Sadre Alam <mdalam@xxxxxxxxxxxxxx> wrote on Sun, 10 Jan 2021
> 09:31:45 +0530:
>
>> From QPIC version 2.0 onwards new register got added to
>
> a
>
>> read last codeword. This change will update the same.
>
> the? ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> Please reword this sentence.
Fixed this in V4 patch.
>
>> For first three code word READ_LOCATION_n register will be
>> use.For last code word READ_LOCATION_LAST_CW_n register will be
>> use.
>
> "For the first three codewords, READ_LOCATION_n registers will be used.
> The last codeword register will be accessed through
> READ_LOCATION_LAST_CW_n."
>
> Also, please specify what these registers store.
The location register is mainly use for reading controller
buffer via BAM mode. The bits of the register "NAND_READ_LOCATION_LAST_CW_n, n=0..4"
as follow:
Perhaps what I do not understand is: when is this "last_cw" register
more useful than the previous set?
[9:0]-bits : (OFFSET) This bit defines the offset from the buffer base address to be picked up for DMA.
[25:16]-bits: (SIZE) This bit of every register will define the size of the chunk for DMA.
31-bit : (LAST) If this bit is set, the controller takes the particular register to specify the last chunk
of data made available for DMA. This chunk is part of the internal buffer of the controller.
>
Thanks,
Miquèl