Hello, [email protected] wrote on Fri, 29 Jan 2021 03:18:46 +0530:
> On 2021-01-14 21:23, Miquel Raynal wrote: > > Hello, > > > > Md Sadre Alam <[email protected]> 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
