Nand flash not getting detected in iMX6X processor

[Sowmya1z]

Dear all,

  I am porting Nand flash driver in iMX6X WinCE 7.0 platform. I am using micron's MT29F4G16ABBDAHC nand. nand is not detecting in wince 7.0. once the wince OS is launched i am getting "No NAND type matched" print in the hyper terminal.

i added the following entries for supporting the "MT29F4G16ABBDAHC" nand in the NANDTYPES.h file:

{
        {NAND, 4096, 2048 * 64, 64, 2048},  //spare area bytes are not considered       
        {0x2C, 0xBC, 0x90, 0x55},                   //BYTE        NANDCode[NANDID_LENGTH]
        3,                                          //BYTE        NumBlockCycles
        5,                                          //BYTE        ChipAddrCycleNum
        16,                                          //BYTE        DataWidth
        1,                                          //BYTE        BBMarkNum
        {0},                                        //BYTE        BBMarkPage
        6,                                          //BYTE        StatusBusyBit
        0,                                          //BYTE        StatusErrorBit
        64,                                         //WORD        SpareDataLength
        0x70,                                       //BYTE        CmdReadStatus
        0x00,                                       //BYTE        CmdRead1
        0x30,                                       //BYTE        CmdRead2
        0x90,                                       //BYTE        CmdReadId
        0xff,                                       //BYTE        CmdReset
        0x80,                                       //BYTE        CmdWrite1
        0x10,                                       //BYTE        CmdWrite2
        0x60,                                       //BYTE        CmdErase1
        0xD0,                                       //BYTE        CmdErase2
        {25, 16, 25, 20}                             //NANDTiming  timings

}
     The driver is returning the nand id as 0.  I configured the GPMICLK to 198MHz, AHB clock to 132MHz.

 Please help me to solve this issue.

Regards,

Sowmya

[VladanJovanovic · Accepted solution]

This is obviously SW issue that is difficult to answer here as WinCE7 comes from 3rd party.

Few easy steps to check:

- do you see any activity on NAND bus pins?

- does the driver start to communicate succesfully with the NAND (read ID etc., basic init )

- are clocks to NAND controller enabled?

- are pins set up for NAND operation (no other SW module is reconfiguring IOMUX for other operation)?

this should get you started finding the root cause of problem.

Vladan

[Sowmya1z]

Dear Vladan,

Thank you for the reply.The APBH is not initialized. After initializing the APBH channel, NAND is detected. Now iam able to read and write to the NAND.

Regards,

Sowmya