Nand Flash Controller

• ONFI 2.1
• Code idea from Cosmos-plus-OpenSSD
• DDR mode
• DMA Transfer

Table of Contents

• NFC RAW Interface
• AXI Interface
• Modules and Files
• How to Use
• Building IP and simulation

NFC RAW Interface

---

Configure Interface

    input   [5:0]                  iOpcode                 ;
    input   [4:0]                  iTargetID               ;
    input   [31:0]                 iAddress                ;
    input   [15:0]                 iLength                 ;
    input                          iCMDValid               ;
    output                         oCMDReady               ;

Data Output Interface

    input   [15:0]                 iWriteData              ;
    input                          iWriteLast              ;
    input                          iWriteValid             ;
    input   [1:0]                  iWriteKeep              ;
    output                         oWriteReady             ;

Data Input Interface

    output  [15:0]                 oReadData               ;
    output                         oReadLast               ;
    output                         oReadValid              ;
    output  [1:0]                  oReadKeep               ;
    input                          iReadReady              ;

Status Interface

    output  [NumberOfWays - 1:0]   oReadyBusy              ;
    
    output  [23:0]                 oStatus                 ;
    output                         oStatusValid            ;

Nand Flash Physics Interface

    inout                          IO_NAND_DQS             ;
    inout                  [7:0]   IO_NAND_DQ              ;
    output  [NumberOfWays - 1:0]   O_NAND_CE               ;
    output                         O_NAND_WE               ;
    output                         O_NAND_RE               ;
    output                         O_NAND_ALE              ;
    output                         O_NAND_CLE              ;
    input   [NumberOfWays - 1:0]   I_NAND_RB               ;
    output                         O_NAND_WP               ;

AXI Interface

---

AXI-lite for Configuration

    /*
    * AXI-lite slave interface
    */
    input  wire [ADDR_WIDTH-1:0]      s_axil_awaddr      ,
    input  wire [2:0]                 s_axil_awprot      ,
    input  wire                       s_axil_awvalid     ,
    output wire                       s_axil_awready     ,
    input  wire [DATA_WIDTH-1:0]      s_axil_wdata       ,
    input  wire [STRB_WIDTH-1:0]      s_axil_wstrb       ,
    input  wire                       s_axil_wvalid      ,
    output wire                       s_axil_wready      ,
    output wire [1:0]                 s_axil_bresp       ,
    output wire                       s_axil_bvalid      ,
    input  wire                       s_axil_bready      ,
    input  wire [ADDR_WIDTH-1:0]      s_axil_araddr      ,
    input  wire [2:0]                 s_axil_arprot      ,
    input  wire                       s_axil_arvalid     ,
    output wire                       s_axil_arready     ,
    output wire [DATA_WIDTH-1:0]      s_axil_rdata       ,
    output wire [1:0]                 s_axil_rresp       ,
    output wire                       s_axil_rvalid      ,
    input  wire                       s_axil_rready      ,

Configuration Offset	Register Name	Description
0x00	rCommand	{targetID, opcode}
0x04	rAddress	Way/Col/Row/Features
0x08	rLength	Data length, 8 Bytes Alignment
0x0C	rDMARAddress	Data Address ,flash read from DDR
0x10	rDMAWAddress	Data Address ,flash write to DDR
0x14	rFeature	Features for Nand
0x18	rCommandFail	Last Command status, last bit high valid
0x1C	rNFCStatus	[15:8]Nand Flash Status, [7:0]NFC status
0x20	rNandRBStatus	[7:0] Nand R/B Status

AXI for Data Transform

    /*
    * AXI master interface
    */
    output wire [AXI_ID_WIDTH-1:0]    m_axi_awid         ,
    output wire [AXI_ADDR_WIDTH-1:0]  m_axi_awaddr       ,
    output wire [7:0]                 m_axi_awlen        ,
    output wire [2:0]                 m_axi_awsize       ,
    output wire [1:0]                 m_axi_awburst      ,
    output wire                       m_axi_awlock       ,
    output wire [3:0]                 m_axi_awcache      ,
    output wire [2:0]                 m_axi_awprot       ,
    output wire                       m_axi_awvalid      ,
    input  wire                       m_axi_awready      ,
    output wire [AXI_DATA_WIDTH-1:0]  m_axi_wdata        ,
    output wire [AXI_STRB_WIDTH-1:0]  m_axi_wstrb        ,
    output wire                       m_axi_wlast        ,
    output wire                       m_axi_wvalid       ,
    input  wire                       m_axi_wready       ,
    input  wire [AXI_ID_WIDTH-1:0]    m_axi_bid          ,
    input  wire [1:0]                 m_axi_bresp        ,
    input  wire                       m_axi_bvalid       ,
    output wire                       m_axi_bready       ,
    output wire [AXI_ID_WIDTH-1:0]    m_axi_arid         ,
    output wire [AXI_ADDR_WIDTH-1:0]  m_axi_araddr       ,
    output wire [7:0]                 m_axi_arlen        ,
    output wire [2:0]                 m_axi_arsize       ,
    output wire [1:0]                 m_axi_arburst      ,
    output wire                       m_axi_arlock       ,
    output wire [3:0]                 m_axi_arcache      ,
    output wire [2:0]                 m_axi_arprot       ,
    output wire                       m_axi_arvalid      ,
    input  wire                       m_axi_arready      ,
    input  wire [AXI_ID_WIDTH-1:0]    m_axi_rid          ,
    input  wire [AXI_DATA_WIDTH-1:0]  m_axi_rdata        ,
    input  wire [1:0]                 m_axi_rresp        ,
    input  wire                       m_axi_rlast        ,
    input  wire                       m_axi_rvalid       ,
    output wire                       m_axi_rready       ,

Clock Domain

s_axi_clk AXI interface clock (100MHz) iSystemClock Nand Controllor logic clock (83.333MHz, sync mode 4) iDelayRefClock 200MHz for IODELAY2 iOutputDrivingClock 2x iSystemClock for OSERDESE2 (166.666MHz)

Modules and Files

---

Module/Files	Description
NandFlashController_Top_AXI	AXI and AXIS Interface Top Module
NandFlashController_Top	Raw Interface Top Module
NFC_Command_*	Command Decode
NFC_Atom_*	Atom Command (Command/Address/DataIn/DataOut)
NFC_Phy*	Pinpad

How to Use

---

Select Way

• opcode : 6'b100000
• address : {24'd0, 8'b0000_0001} means select way 0

Set Column Address

• opcode : 6'b100010
• address : {16'd0, Col_addr_2Bytes}

Set Row Address

• opcode : 6'b100100
• address : {8'd0, Row_addr_3Bytes}

Reset(FFh)

• Async
• opcode : 6'b000001

Nand Flash need Reset when power up.

Set Feature(EFh)

• Async
• opcode : 6'b000010

Set Timing mode to Sync mode 0-5.

MT29F64G can run Sync mode 4.

Get Feature(EEh)

• Sync
• opcode : 6'b000101

Get the current Feature.

Program Page(80h)

• Sync
• opcode : 6'b000011
• targetID : 5'b00000 Program page normal(10h)
• targetID : 5'b00001 Program page cache(15h)
• targetID : 5'b00010 Program page multi-plane(11h)
• length : 4320 means 4320 Bytes, must be even

Read Page(00h)

• Sync
• opcode : 6'b000100
• length : 4320 means 4320 Bytes, must be even

Erase Block(60h)

• Sync
• opcode : 6'b000110
• targetID : 5'b00000 Erase Block normal(D0h)
• targetID : 5'b00010 Erase Block multi-plane(D1h)

Read Status(70h/78h)

• Sync
• opcode : 6'b000111
• targetID : 5'b00000 Read Status normal(70h)
• targetID : 5'b00001 Read Status Enhanced(78h)

Building IP and simulation

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• need modelsim 10.6d / Vivado Simualtor

make prj