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Merge pull request #6 from AngeloJacobo/kimos_dev 

add support for kimos project
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Angelo Jacobo 2024-06-09 10:52:18 +08:00 committed by GitHub
parent 9737a11868 a1b15fb9d6
commit 1ce369cc1f
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3 changed files with 78 additions and 56 deletions
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rtl/ddr3_controller.v
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@ -46,10 +46,11 @@ module ddr3_controller #(
AUX_WIDTH = 4, //width of aux line (must be >= 4) AUX_WIDTH = 4, //width of aux line (must be >= 4)
WB2_ADDR_BITS = 7, //width of 2nd wishbone address bus WB2_ADDR_BITS = 7, //width of 2nd wishbone address bus
WB2_DATA_BITS = 32, //width of 2nd wishbone data bus WB2_DATA_BITS = 32, //width of 2nd wishbone data bus
/* verilator lint_off UNUSEDPARAM */
parameter[0:0] MICRON_SIM = 0, //enable faster simulation for micron ddr3 model (shorten POWER_ON_RESET_HIGH and INITIAL_CKE_LOW) parameter[0:0] MICRON_SIM = 0, //enable faster simulation for micron ddr3 model (shorten POWER_ON_RESET_HIGH and INITIAL_CKE_LOW)
ODELAY_SUPPORTED = 1, //set to 1 when ODELAYE2 is supported ODELAY_SUPPORTED = 1, //set to 1 when ODELAYE2 is supported
SECOND_WISHBONE = 0, //set to 1 if 2nd wishbone is needed SECOND_WISHBONE = 0, //set to 1 if 2nd wishbone is needed
parameter[1:0] DIC = 2'b00, //Output Driver Impedance Control (2'b00 = RZQ/6, 2'b01 = RZQ/7, RZQ = 240ohms)
parameter[2:0] RTT_NOM = 3'b011, //RTT Nominal (3'b000 = disabled, 3'b001 = RZQ/4, 3'b010 = RZQ/2 , 3'b011 = RZQ/6, RZQ = 240ohms)
parameter // The next parameters act more like a localparam (since user does not have to set this manually) but was added here to simplify port declaration parameter // The next parameters act more like a localparam (since user does not have to set this manually) but was added here to simplify port declaration
serdes_ratio = 4, // this controller is fixed as a 4:1 memory controller (CONTROLLER_CLK_PERIOD/DDR3_CLK_PERIOD = 4) serdes_ratio = 4, // this controller is fixed as a 4:1 memory controller (CONTROLLER_CLK_PERIOD/DDR3_CLK_PERIOD = 4)
wb_data_bits = DQ_BITS*LANES*serdes_ratio*2, wb_data_bits = DQ_BITS*LANES*serdes_ratio*2,
@ -62,7 +63,7 @@ module ddr3_controller #(
) )
( (
input wire i_controller_clk, //i_controller_clk has period of CONTROLLER_CLK_PERIOD input wire i_controller_clk, //i_controller_clk has period of CONTROLLER_CLK_PERIOD
(* mark_debug = "true" *) input wire i_rst_n, //200MHz input clock input wire i_rst_n, //200MHz input clock
// Wishbone inputs // Wishbone inputs
input wire i_wb_cyc, //bus cycle active (1 = normal operation, 0 = all ongoing transaction are to be cancelled) input wire i_wb_cyc, //bus cycle active (1 = normal operation, 0 = all ongoing transaction are to be cancelled)
input wire i_wb_stb, //request a transfer input wire i_wb_stb, //request a transfer
@ -79,31 +80,32 @@ module ddr3_controller #(
// //
// Wishbone 2 (PHY) inputs // Wishbone 2 (PHY) inputs
input wire i_wb2_cyc, //bus cycle active (1 = normal operation, 0 = all ongoing transaction are to be cancelled) input wire i_wb2_cyc, //bus cycle active (1 = normal operation, 0 = all ongoing transaction are to be cancelled)
(* mark_debug = "true" *) input wire i_wb2_stb, //request a transfer input wire i_wb2_stb, //request a transfer
input wire i_wb2_we, //write-enable (1 = write, 0 = read) input wire i_wb2_we, //write-enable (1 = write, 0 = read)
input wire[WB2_ADDR_BITS - 1:0] i_wb2_addr, //memory-mapped register to be accessed input wire[WB2_ADDR_BITS - 1:0] i_wb2_addr, //memory-mapped register to be accessed
input wire[wb2_sel_bits - 1:0] i_wb2_sel, //byte strobe for write (1 = write the byte) input wire[wb2_sel_bits - 1:0] i_wb2_sel, //byte strobe for write (1 = write the byte)
input wire[WB2_DATA_BITS - 1:0] i_wb2_data, //write data input wire[WB2_DATA_BITS - 1:0] i_wb2_data, //write data
// Wishbone 2 (Controller) outputs // Wishbone 2 (Controller) outputs
output reg o_wb2_stall, //1 = busy, cannot accept requests output reg o_wb2_stall, //1 = busy, cannot accept requests
(* mark_debug = "true" *) output reg o_wb2_ack, //1 = read/write request has completed output reg o_wb2_ack, //1 = read/write request has completed
output reg[WB2_DATA_BITS - 1:0] o_wb2_data, //read data output reg[WB2_DATA_BITS - 1:0] o_wb2_data, //read data
// //
// PHY interface // PHY interface
(* mark_debug = "true" *) input wire[DQ_BITS*LANES*8 - 1:0] i_phy_iserdes_data, (* mark_debug = "true" *) input wire[DQ_BITS*LANES*8 - 1:0] i_phy_iserdes_data,
(* mark_debug = "true" *) input wire[LANES*serdes_ratio*2 - 1:0] i_phy_iserdes_dqs, (* mark_debug = "true" *) input wire[LANES*serdes_ratio*2 - 1:0] i_phy_iserdes_dqs,
input wire[LANES*serdes_ratio*2 - 1:0] i_phy_iserdes_bitslip_reference, input wire[LANES*serdes_ratio*2 - 1:0] i_phy_iserdes_bitslip_reference,
(* mark_debug = "true" *) input wire i_phy_idelayctrl_rdy, input wire i_phy_idelayctrl_rdy,
output wire[cmd_len*serdes_ratio-1:0] o_phy_cmd, output wire[cmd_len*serdes_ratio-1:0] o_phy_cmd,
(* mark_debug = "true" *) output wire o_phy_dqs_tri_control, o_phy_dq_tri_control, output reg o_phy_dqs_tri_control, o_phy_dq_tri_control,
output wire o_phy_toggle_dqs, output wire o_phy_toggle_dqs,
(* mark_debug = "true" *) output wire[wb_data_bits-1:0] o_phy_data, output wire[wb_data_bits-1:0] o_phy_data,
output wire[wb_sel_bits-1:0] o_phy_dm, output wire[wb_sel_bits-1:0] o_phy_dm,
output wire[4:0] o_phy_odelay_data_cntvaluein, o_phy_odelay_dqs_cntvaluein, output wire[4:0] o_phy_odelay_data_cntvaluein, o_phy_odelay_dqs_cntvaluein,
(* mark_debug = "true" *) output wire[4:0] o_phy_idelay_data_cntvaluein, o_phy_idelay_dqs_cntvaluein, output wire[4:0] o_phy_idelay_data_cntvaluein,
output wire[4:0] o_phy_idelay_dqs_cntvaluein,
output reg[LANES-1:0] o_phy_odelay_data_ld, o_phy_odelay_dqs_ld, output reg[LANES-1:0] o_phy_odelay_data_ld, o_phy_odelay_dqs_ld,
output reg[LANES-1:0] o_phy_idelay_data_ld, output reg[LANES-1:0] o_phy_idelay_data_ld,
(* mark_debug = "true" *) output reg[LANES-1:0] o_phy_idelay_dqs_ld, output reg[LANES-1:0] o_phy_idelay_dqs_ld,
output reg[LANES-1:0] o_phy_bitslip, output reg[LANES-1:0] o_phy_bitslip,
output reg o_phy_write_leveling_calib, output reg o_phy_write_leveling_calib,
output wire o_phy_reset, output wire o_phy_reset,
@ -298,6 +300,7 @@ module ddr3_controller #(
ISSUE_WRITE_1 = 9, ISSUE_WRITE_1 = 9,
ISSUE_WRITE_2 = 10, ISSUE_WRITE_2 = 10,
ISSUE_READ = 11, ISSUE_READ = 11,
//ISSUE_READ_2 = 12,
READ_DATA = 12, READ_DATA = 12,
ANALYZE_DATA = 13, ANALYZE_DATA = 13,
CHECK_STARTING_DATA = 14, CHECK_STARTING_DATA = 14,
@ -337,8 +340,8 @@ module ddr3_controller #(
// MR1 (JEDEC DDR3 doc pg. 27) // MR1 (JEDEC DDR3 doc pg. 27)
localparam DLL_EN = 1'b0; //DLL Enable/Disable: Enabled(0) localparam DLL_EN = 1'b0; //DLL Enable/Disable: Enabled(0)
localparam[1:0] DIC = 2'b00; //Output Driver Impedance Control // localparam[1:0] DIC = 2'b01; //Output Driver Impedance Control (RZQ/7) (elevate this to parameter)
localparam[2:0] RTT_NOM = 3'b011; //RTT Nominal: 40ohms (RQZ/6) is the impedance of the PCB trace // localparam[2:0] RTT_NOM = 3'b001; //RTT Nominal: RZQ/4 (elevate this to parameter)
localparam[0:0] WL_EN = 1'b1; //Write Leveling Enable: Disabled localparam[0:0] WL_EN = 1'b1; //Write Leveling Enable: Disabled
localparam[1:0] AL = 2'b00; //Additive Latency: Disabled localparam[1:0] AL = 2'b00; //Additive Latency: Disabled
localparam[0:0] TDQS = 1'b0; //Termination Data Strobe: Disabled (provides additional termination resistance outputs. localparam[0:0] TDQS = 1'b0; //Termination Data Strobe: Disabled (provides additional termination resistance outputs.
@ -363,7 +366,7 @@ module ddr3_controller #(
/************************************************************* Registers and Wires *************************************************************/ /************************************************************* Registers and Wires *************************************************************/
integer index; integer index;
(* mark_debug = "true" *) reg[4:0] instruction_address = 0; //address for accessing rom instruction reg[4:0] instruction_address = 0; //address for accessing rom instruction
reg[27:0] instruction = INITIAL_RESET_INSTRUCTION; //instruction retrieved from reset instruction rom reg[27:0] instruction = INITIAL_RESET_INSTRUCTION; //instruction retrieved from reset instruction rom
reg[ DELAY_COUNTER_WIDTH - 1:0] delay_counter = INITIAL_RESET_INSTRUCTION[DELAY_COUNTER_WIDTH - 1:0]; //counter used for delays reg[ DELAY_COUNTER_WIDTH - 1:0] delay_counter = INITIAL_RESET_INSTRUCTION[DELAY_COUNTER_WIDTH - 1:0]; //counter used for delays
reg delay_counter_is_zero = (INITIAL_RESET_INSTRUCTION[DELAY_COUNTER_WIDTH - 1:0] == 0); //counter is now zero so retrieve next delay reg delay_counter_is_zero = (INITIAL_RESET_INSTRUCTION[DELAY_COUNTER_WIDTH - 1:0] == 0); //counter is now zero so retrieve next delay
@ -427,27 +430,27 @@ module ddr3_controller #(
reg write_dq_d; reg write_dq_d;
reg[STAGE2_DATA_DEPTH+1:0] write_dq; reg[STAGE2_DATA_DEPTH+1:0] write_dq;
(* mark_debug = "true" *) reg[$clog2(DONE_CALIBRATE):0] state_calibrate; (* mark_debug = "true" *) reg[$clog2(DONE_CALIBRATE)-1:0] state_calibrate;
reg[STORED_DQS_SIZE*8-1:0] dqs_store = 0; reg[STORED_DQS_SIZE*8-1:0] dqs_store = 0;
reg[$clog2(STORED_DQS_SIZE):0] dqs_count_repeat = 0; reg[$clog2(STORED_DQS_SIZE)-1:0] dqs_count_repeat = 0;
reg[$clog2(STORED_DQS_SIZE*8)-1:0] dqs_start_index = 0; (* mark_debug ="true" *) reg[$clog2(STORED_DQS_SIZE*8)-1:0] dqs_start_index = 0;
(* mark_debug ="true" *) reg[$clog2(STORED_DQS_SIZE*8)-1:0] dqs_start_index_stored = 0; reg[$clog2(STORED_DQS_SIZE*8)-1:0] dqs_start_index_stored = 0;
(* mark_debug ="true" *) reg[$clog2(STORED_DQS_SIZE*8)-1:0] dqs_target_index = 0; (* mark_debug ="true" *) reg[$clog2(STORED_DQS_SIZE*8)-1:0] dqs_target_index = 0;
(* mark_debug ="true" *) reg[$clog2(STORED_DQS_SIZE*8)-1:0] dqs_target_index_orig = 0; reg[$clog2(STORED_DQS_SIZE*8)-1:0] dqs_target_index_orig = 0;
(* mark_debug ="true" *) reg[$clog2(STORED_DQS_SIZE*8):0] dq_target_index[LANES-1:0]; reg[$clog2(STORED_DQS_SIZE*8):0] dq_target_index[LANES-1:0];
(* mark_debug ="true" *) wire[$clog2(STORED_DQS_SIZE*8)-1:0] dqs_target_index_value; wire[$clog2(STORED_DQS_SIZE*8)-1:0] dqs_target_index_value;
reg[$clog2(REPEAT_DQS_ANALYZE):0] dqs_start_index_repeat=0; (* mark_debug ="true" *) reg[$clog2(REPEAT_DQS_ANALYZE):0] dqs_start_index_repeat=0;
reg[3:0] train_delay; reg[3:0] train_delay;
(* mark_debug = "true" *) reg[3:0] delay_before_read_data = 0; reg[3:0] delay_before_read_data = 0;
reg[$clog2(DELAY_BEFORE_WRITE_LEVEL_FEEDBACK):0] delay_before_write_level_feedback = 0; reg[$clog2(DELAY_BEFORE_WRITE_LEVEL_FEEDBACK):0] delay_before_write_level_feedback = 0;
reg initial_dqs = 0; (* mark_debug = "true" *) reg initial_dqs = 0;
(* mark_debug = "true" *) reg[lanes_clog2-1:0] lane = 0; (* mark_debug = "true" *) reg[lanes_clog2-1:0] lane = 0;
reg[$clog2(8*LANES)-1:0] lane_times_8 = 0; reg[$clog2(8*LANES)-1:0] lane_times_8 = 0;
/* verilator lint_off UNUSEDSIGNAL */ /* verilator lint_off UNUSEDSIGNAL */
reg[15:0] dqs_bitslip_arrangement = 0; reg[15:0] dqs_bitslip_arrangement = 0;
/* verilator lint_off UNUSEDSIGNAL */ /* verilator lint_off UNUSEDSIGNAL */
(* mark_debug = "true" *) reg[3:0] added_read_pipe_max = 0; reg[3:0] added_read_pipe_max = 0;
(* mark_debug = "true" *) reg[3:0] added_read_pipe[LANES - 1:0]; reg[3:0] added_read_pipe[LANES - 1:0];
//each lane will have added delay relative to when ISERDES should actually return the data //each lane will have added delay relative to when ISERDES should actually return the data
//this make sure that we will wait until the lane with longest delay (added_read_pipe_max) is received before //this make sure that we will wait until the lane with longest delay (added_read_pipe_max) is received before
//all lanes are sent to wishbone data //all lanes are sent to wishbone data
@ -460,30 +463,29 @@ module ddr3_controller #(
reg[15:0] delay_read_pipe[1:0]; //delay when each lane will retrieve i_phy_iserdes_data (since different lanes might not be aligned with each other and needs to be retrieved at a different time) reg[15:0] delay_read_pipe[1:0]; //delay when each lane will retrieve i_phy_iserdes_data (since different lanes might not be aligned with each other and needs to be retrieved at a different time)
reg[wb_data_bits - 1:0] o_wb_data_q[1:0]; //store data retrieved from i_phy_iserdes_data to be sent to o_wb_data reg[wb_data_bits - 1:0] o_wb_data_q[1:0]; //store data retrieved from i_phy_iserdes_data to be sent to o_wb_data
reg[AUX_WIDTH:0] o_wb_ack_read_q[MAX_ADDED_READ_ACK_DELAY-1:0]; reg[AUX_WIDTH:0] o_wb_ack_read_q[MAX_ADDED_READ_ACK_DELAY-1:0];
(* mark_debug = "true" *) reg calib_stb = 0;
reg calib_stb = 0;
reg[wb_sel_bits-1:0] calib_sel = 0; reg[wb_sel_bits-1:0] calib_sel = 0;
reg[AUX_WIDTH-1:0] calib_aux = 0; reg[AUX_WIDTH-1:0] calib_aux = 0;
reg calib_we = 0; (* mark_debug = "true" *) reg calib_we = 0;
reg[wb_addr_bits-1:0] calib_addr = 0; reg[wb_addr_bits-1:0] calib_addr = 0;
reg[wb_data_bits-1:0] calib_data = 0; reg[wb_data_bits-1:0] calib_data = 0;
reg write_calib_odt = 0; reg write_calib_odt = 0;
reg write_calib_dqs = 0; reg write_calib_dqs = 0;
reg write_calib_dq = 0; reg write_calib_dq = 0;
reg prev_write_level_feedback = 1; (* mark_debug = "true" *) reg prev_write_level_feedback = 1;
reg[wb_data_bits-1:0] read_data_store = 0; reg[wb_data_bits-1:0] read_data_store = 0;
reg[127:0] write_pattern = 0; reg[127:0] write_pattern = 0;
(* mark_debug = "true" *) reg[$clog2(64):0] data_start_index[LANES-1:0]; reg[$clog2(64):0] data_start_index[LANES-1:0];
reg[4:0] odelay_data_cntvaluein[LANES-1:0]; (* mark_debug = "true" *) reg[4:0] odelay_data_cntvaluein[LANES-1:0];
reg[4:0] odelay_dqs_cntvaluein[LANES-1:0]; reg[4:0] odelay_dqs_cntvaluein[LANES-1:0];
reg[4:0] idelay_data_cntvaluein[LANES-1:0]; reg[4:0] idelay_data_cntvaluein[LANES-1:0];
reg[4:0] idelay_data_cntvaluein_prev; reg[4:0] idelay_data_cntvaluein_prev;
reg[4:0] idelay_dqs_cntvaluein[LANES-1:0]; (* mark_debug = "true" *) reg[4:0] idelay_dqs_cntvaluein[LANES-1:0];
reg[$clog2(REPEAT_CLK_SAMPLING):0] sample_clk_repeat = 0; reg[$clog2(REPEAT_CLK_SAMPLING):0] sample_clk_repeat = 0;
reg stored_write_level_feedback = 0; (* mark_debug = "true" *) reg stored_write_level_feedback = 0;
reg[5:0] start_index_check = 0; reg[5:0] start_index_check = 0;
reg[63:0] read_lane_data = 0; (* mark_debug = "true" *) reg[63:0] read_lane_data = 0;
reg odelay_cntvalue_repeated = 0; (* mark_debug = "true" *) reg odelay_cntvalue_halfway = 0;
reg already_finished_calibration = 0; reg already_finished_calibration = 0;
// Wishbone 2 // Wishbone 2
reg wb2_stb = 0; reg wb2_stb = 0;
@ -500,7 +502,7 @@ module ddr3_controller #(
reg[LANES-1:0] wb2_phy_odelay_dqs_ld; reg[LANES-1:0] wb2_phy_odelay_dqs_ld;
reg[LANES-1:0] wb2_phy_idelay_data_ld; reg[LANES-1:0] wb2_phy_idelay_data_ld;
reg[LANES-1:0] wb2_phy_idelay_dqs_ld; reg[LANES-1:0] wb2_phy_idelay_dqs_ld;
reg[LANES-1:0] write_level_fail = 0; (* mark_debug ="true" *)reg[LANES-1:0] write_level_fail = 0;
reg[lanes_clog2-1:0] wb2_write_lane; reg[lanes_clog2-1:0] wb2_write_lane;
reg sync_rst_wb2 = 0, sync_rst_controller = 0; reg sync_rst_wb2 = 0, sync_rst_controller = 0;
reg reset_from_wb2 = 0, reset_from_calibrate = 0, reset_from_test = 0, repeat_test = 0; reg reset_from_wb2 = 0, reset_from_calibrate = 0, reset_from_test = 0, repeat_test = 0;
@ -928,6 +930,7 @@ module ddr3_controller #(
<< (data_start_index[index]>>3)) | unaligned_dm[index]; << (data_start_index[index]>>3)) | unaligned_dm[index];
/* verilator lint_on WIDTH */ /* verilator lint_on WIDTH */
end end
// stage2 can have multiple pipelined stages inside it which acts as delay before issuing the write data (after issuing write command) // stage2 can have multiple pipelined stages inside it which acts as delay before issuing the write data (after issuing write command)
for(index = 0; index < STAGE2_DATA_DEPTH-1; index = index+1) begin for(index = 0; index < STAGE2_DATA_DEPTH-1; index = index+1) begin
stage2_data[index+1] <= stage2_data[index]; stage2_data[index+1] <= stage2_data[index];
@ -1391,8 +1394,14 @@ module ddr3_controller #(
//o_wb_ack_read_q[0][0] is needed internally to ack during write calibration but it must not go outside (since it is not an actual user wb request unless we are in DONE_CALIBRATE) //o_wb_ack_read_q[0][0] is needed internally to ack during write calibration but it must not go outside (since it is not an actual user wb request unless we are in DONE_CALIBRATE)
assign o_aux = o_wb_ack_read_q[0][AUX_WIDTH:1]; assign o_aux = o_wb_ack_read_q[0][AUX_WIDTH:1];
assign o_wb_data = o_wb_data_q[index_wb_data]; assign o_wb_data = o_wb_data_q[index_wb_data];
assign o_phy_dqs_tri_control = !write_dqs[STAGE2_DATA_DEPTH];
assign o_phy_dq_tri_control = !write_dq[STAGE2_DATA_DEPTH]; // DQ/DQS IO tristate control logic
always @(posedge i_controller_clk) begin
o_phy_dqs_tri_control <= !write_dqs[STAGE2_DATA_DEPTH-1];
o_phy_dq_tri_control <= !write_dq[STAGE2_DATA_DEPTH-1];
end
// assign o_phy_dqs_tri_control = !write_dqs[STAGE2_DATA_DEPTH]; // Warning in implementation: not routable to load
// assign o_phy_dq_tri_control = !write_dq[STAGE2_DATA_DEPTH]; // Warning in implementation: not routable to load
generate generate
if(STAGE2_DATA_DEPTH >= 2) begin: TOGGLE_DQS if(STAGE2_DATA_DEPTH >= 2) begin: TOGGLE_DQS
assign o_phy_toggle_dqs = write_dqs_val[STAGE2_DATA_DEPTH-2]; assign o_phy_toggle_dqs = write_dqs_val[STAGE2_DATA_DEPTH-2];
@ -1445,7 +1454,7 @@ module ddr3_controller #(
delay_before_read_data <= 0; delay_before_read_data <= 0;
read_lane_data <= 0; read_lane_data <= 0;
o_phy_write_leveling_calib <= 0; o_phy_write_leveling_calib <= 0;
odelay_cntvalue_repeated <= 0; odelay_cntvalue_halfway <= 0;
write_level_fail <= 0; write_level_fail <= 0;
read_test_address_counter <= 0; read_test_address_counter <= 0;
write_test_address_counter <= 0; write_test_address_counter <= 0;
@ -1647,7 +1656,7 @@ module ddr3_controller #(
/* verilator lint_on WIDTH */ /* verilator lint_on WIDTH */
pause_counter <= 0; //read calibration now complete so continue the reset instruction sequence pause_counter <= 0; //read calibration now complete so continue the reset instruction sequence
lane <= 0; lane <= 0;
odelay_cntvalue_repeated <= 0; odelay_cntvalue_halfway <= 0;
prev_write_level_feedback <= 1'b1; prev_write_level_feedback <= 1'b1;
sample_clk_repeat <= 0; sample_clk_repeat <= 0;
stored_write_level_feedback <= 0; stored_write_level_feedback <= 0;
@ -1705,7 +1714,7 @@ module ddr3_controller #(
end end
else begin else begin
lane <= lane + 1; lane <= lane + 1;
odelay_cntvalue_repeated <= 0; odelay_cntvalue_halfway <= 0;
prev_write_level_feedback <= 1'b1; prev_write_level_feedback <= 1'b1;
sample_clk_repeat <= 0; sample_clk_repeat <= 0;
state_calibrate <= START_WRITE_LEVEL; state_calibrate <= START_WRITE_LEVEL;
@ -1714,7 +1723,11 @@ module ddr3_controller #(
else begin else begin
o_phy_odelay_data_ld[lane] <= 1; o_phy_odelay_data_ld[lane] <= 1;
o_phy_odelay_dqs_ld[lane] <= 1; o_phy_odelay_dqs_ld[lane] <= 1;
write_level_fail[lane] <= (odelay_cntvalue_repeated && odelay_data_cntvaluein[lane] == 2); write_level_fail[lane] <= odelay_cntvalue_halfway;
if(odelay_cntvalue_halfway) begin // if halfway cntvalue is reached which is illegal (or impossible to happen), then we load the original cntvalues
odelay_data_cntvaluein[lane] <= DATA_INITIAL_ODELAY_TAP[4:0];
odelay_dqs_cntvaluein[lane] <= DQS_INITIAL_ODELAY_TAP[4:0];
end
state_calibrate <= START_WRITE_LEVEL; state_calibrate <= START_WRITE_LEVEL;
end end
end end
@ -1754,7 +1767,7 @@ module ddr3_controller #(
// at burst 2 (burst 0 and burst 1 are cut-off since each burst uses 1 ddr3_clk cycle) // at burst 2 (burst 0 and burst 1 are cut-off since each burst uses 1 ddr3_clk cycle)
// Note here that if DQ and DQS sa same delay, then we know the DQS will always be aligned with DQ data // Note here that if DQ and DQS sa same delay, then we know the DQS will always be aligned with DQ data
ISSUE_READ: begin ISSUE_READ: begin
calib_stb <= 1;//actual request flag calib_stb <= 1;//actual request flag
calib_aux <= 1; //AUX ID to determine later if ACK is for read or write calib_aux <= 1; //AUX ID to determine later if ACK is for read or write
calib_we <= 0; //write-enable calib_we <= 0; //write-enable
@ -1762,6 +1775,14 @@ module ddr3_controller #(
state_calibrate <= READ_DATA; state_calibrate <= READ_DATA;
end end
// ISSUE_READ_2: begin
// calib_stb <= 1;//actual request flag
// calib_aux <= 1; //AUX ID to determine later if ACK is for read or write
// calib_we <= 0; //write-enable
// calib_addr <= 1;
// state_calibrate <= READ_DATA;
// end
READ_DATA: if(o_wb_ack_read_q[0] == {{(AUX_WIDTH-2){1'b0}}, 2'd1, 1'b1}) begin //wait for the read ack (which has AUX ID of 1} READ_DATA: if(o_wb_ack_read_q[0] == {{(AUX_WIDTH-2){1'b0}}, 2'd1, 1'b1}) begin //wait for the read ack (which has AUX ID of 1}
read_data_store <= o_wb_data; // read data on address 0 read_data_store <= o_wb_data; // read data on address 0
calib_stb <= 0; calib_stb <= 0;
@ -2036,9 +2057,9 @@ ALTERNATE_WRITE_READ: if(!o_wb_stall_calib) begin
read_lane_data <= {read_data_store[((DQ_BITS*LANES)*7 + 8*lane) +: 8], read_data_store[((DQ_BITS*LANES)*6 + 8*lane) +: 8], read_lane_data <= {read_data_store[((DQ_BITS*LANES)*7 + 8*lane) +: 8], read_data_store[((DQ_BITS*LANES)*6 + 8*lane) +: 8],
read_data_store[((DQ_BITS*LANES)*5 + 8*lane) +: 8], read_data_store[((DQ_BITS*LANES)*4 + 8*lane) +: 8], read_data_store[((DQ_BITS*LANES)*3 + 8*lane) +: 8], read_data_store[((DQ_BITS*LANES)*5 + 8*lane) +: 8], read_data_store[((DQ_BITS*LANES)*4 + 8*lane) +: 8], read_data_store[((DQ_BITS*LANES)*3 + 8*lane) +: 8],
read_data_store[((DQ_BITS*LANES)*2 + 8*lane) +: 8], read_data_store[((DQ_BITS*LANES)*1 + 8*lane) +: 8], read_data_store[((DQ_BITS*LANES)*0 + 8*lane) +: 8] }; read_data_store[((DQ_BITS*LANES)*2 + 8*lane) +: 8], read_data_store[((DQ_BITS*LANES)*1 + 8*lane) +: 8], read_data_store[((DQ_BITS*LANES)*0 + 8*lane) +: 8] };
//maximum value has been reached and will go back to zero at next load //halfway value has been reached (illegal) and will go back to zero at next load
if(odelay_data_cntvaluein[lane] == 31) begin if(odelay_data_cntvaluein[lane] == 15) begin
odelay_cntvalue_repeated <= 1; odelay_cntvalue_halfway <= 1;
end end
if(instruction_address == 19) begin //pre-stall delay to finish all remaining requests if(instruction_address == 19) begin //pre-stall delay to finish all remaining requests
pause_counter <= 1; // pause instruction address until pre-stall delay before refresh sequence finishes pause_counter <= 1; // pause instruction address until pre-stall delay before refresh sequence finishes
@ -2215,7 +2236,7 @@ ALTERNATE_WRITE_READ: if(!o_wb_stall_calib) begin
4: if(!wb2_we) begin 4: if(!wb2_we) begin
o_wb2_data[0] <= i_phy_idelayctrl_rdy; //1 bit, should be high when IDELAYE2 is ready o_wb2_data[0] <= i_phy_idelayctrl_rdy; //1 bit, should be high when IDELAYE2 is ready
o_wb2_data[1 +: 6] <= state_calibrate; //5 bits, FSM state of the calibration sequence6 o_wb2_data[1 +: 5] <= state_calibrate; //5 bits, FSM state of the calibration sequence6
o_wb2_data[1 + 6 +: 5] <= instruction_address; //5 bits, address of the reset sequence o_wb2_data[1 + 6 +: 5] <= instruction_address; //5 bits, address of the reset sequence
o_wb2_data[1 + 6 + 5 +: 4] <= added_read_pipe_max; //4 bit, max added read delay (must have a max value of 1) o_wb2_data[1 + 6 + 5 +: 4] <= added_read_pipe_max; //4 bit, max added read delay (must have a max value of 1)
end end
@ -2287,8 +2308,6 @@ ALTERNATE_WRITE_READ: if(!o_wb_stall_calib) begin
assign o_debug2 = {debug_trigger,i_phy_iserdes_data[62:32]}; assign o_debug2 = {debug_trigger,i_phy_iserdes_data[62:32]};
assign o_debug3 = {debug_trigger,i_phy_iserdes_data[30:0]}; assign o_debug3 = {debug_trigger,i_phy_iserdes_data[30:0]};
assign debug_trigger = repeat_test /*o_wb_ack_read_q[0][0]*/; assign debug_trigger = repeat_test /*o_wb_ack_read_q[0][0]*/;
(* mark_debug = "true" *) wire dq_all_zeroes;
assign dq_all_zeroes = (i_phy_iserdes_data == {(DQ_BITS*LANES*8){1'b0}});
/*********************************************************************************************************************************************/ /*********************************************************************************************************************************************/
@ -2921,10 +2940,10 @@ ALTERNATE_WRITE_READ: if(!o_wb_stall_calib) begin
if(state_calibrate < ISSUE_WRITE_1) begin if(state_calibrate < ISSUE_WRITE_1) begin
assert(!stage1_pending && !stage2_pending); assert(!stage1_pending && !stage2_pending);
end end
if(stage1_pending && state_calibrate == ISSUE_READ) begin if(stage1_pending && (state_calibrate == ISSUE_READ)) begin
assert(stage1_we); assert(stage1_we);
end end
if(stage2_pending && state_calibrate == ISSUE_READ) begin if(stage2_pending && (state_calibrate == ISSUE_READ)) begin
assert(stage2_we); assert(stage2_we);
end end
if(state_calibrate == ANALYZE_DATA) begin if(state_calibrate == ANALYZE_DATA) begin

4
rtl/ddr3_phy.v
View File

@ -912,7 +912,7 @@ module ddr3_phy #(
); // End of IOBUFDS_inst instantiation ); // End of IOBUFDS_inst instantiation
end end
(* mark_debug = "true" *) wire[4:0] IDELAYE2_dqs_CNTVALUEOUT; // (* mark_debug = "true" *) wire[4:0] IDELAYE2_dqs_CNTVALUEOUT;
// IDELAYE2: Input Fixed or Variable Delay Element // IDELAYE2: Input Fixed or Variable Delay Element
// 7 Series // 7 Series
// Xilinx HDL Libraries Guide, version 13.4 // Xilinx HDL Libraries Guide, version 13.4
@ -926,7 +926,7 @@ module ddr3_phy #(
.SIGNAL_PATTERN("CLOCK") //DATA, CLOCK input signal .SIGNAL_PATTERN("CLOCK") //DATA, CLOCK input signal
) )
IDELAYE2_dqs ( IDELAYE2_dqs (
.CNTVALUEOUT(IDELAYE2_dqs_CNTVALUEOUT), // 5-bit output: Counter value output .CNTVALUEOUT(), // 5-bit output: Counter value output
.DATAOUT(idelay_dqs[gen_index]), // 1-bit output: Delayed data output .DATAOUT(idelay_dqs[gen_index]), // 1-bit output: Delayed data output
.C(i_controller_clk), // 1-bit input: Clock input .C(i_controller_clk), // 1-bit input: Clock input
.CE(1'b0), // 1-bit input: Active high enable increment/decrement input .CE(1'b0), // 1-bit input: Active high enable increment/decrement input

7
rtl/ddr3_top.v
View File

@ -11,10 +11,11 @@ module ddr3_top #(
AUX_WIDTH = 4, //width of aux line (must be >= 4) AUX_WIDTH = 4, //width of aux line (must be >= 4)
WB2_ADDR_BITS = 7, //width of 2nd wishbone address bus WB2_ADDR_BITS = 7, //width of 2nd wishbone address bus
WB2_DATA_BITS = 32, //width of 2nd wishbone data bus WB2_DATA_BITS = 32, //width of 2nd wishbone data bus
/* verilator lint_off UNUSEDPARAM */
parameter[0:0] MICRON_SIM = 0, //enable faster simulation for micron ddr3 model (shorten POWER_ON_RESET_HIGH and INITIAL_CKE_LOW) parameter[0:0] MICRON_SIM = 0, //enable faster simulation for micron ddr3 model (shorten POWER_ON_RESET_HIGH and INITIAL_CKE_LOW)
ODELAY_SUPPORTED = 0, //set to 1 when ODELAYE2 is supported ODELAY_SUPPORTED = 0, //set to 1 when ODELAYE2 is supported
SECOND_WISHBONE = 0, //set to 1 if 2nd wishbone for debugging is needed SECOND_WISHBONE = 0, //set to 1 if 2nd wishbone for debugging is needed
parameter[1:0] DIC = 2'b00, //Output Driver Impedance Control (2'b00 = RZQ/6, 2'b01 = RZQ/7, RZQ = 240ohms)
parameter[2:0] RTT_NOM = 3'b011, //RTT Nominal (3'b000 = disabled, 3'b001 = RZQ/4, 3'b010 = RZQ/2 , 3'b011 = RZQ/6, RZQ = 240ohms)
parameter // The next parameters act more like a localparam (since user does not have to set this manually) but was added here to simplify port declaration parameter // The next parameters act more like a localparam (since user does not have to set this manually) but was added here to simplify port declaration
DQ_BITS = 8, //device width (fixed to 8, if DDR3 is x16 then BYTE_LANES will be 2 while ) DQ_BITS = 8, //device width (fixed to 8, if DDR3 is x16 then BYTE_LANES will be 2 while )
serdes_ratio = 4, // this controller is fixed as a 4:1 memory controller (CONTROLLER_CLK_PERIOD/DDR3_CLK_PERIOD = 4) serdes_ratio = 4, // this controller is fixed as a 4:1 memory controller (CONTROLLER_CLK_PERIOD/DDR3_CLK_PERIOD = 4)
@ -188,7 +189,9 @@ ddr3_top #(
.WB2_DATA_BITS(WB2_DATA_BITS), //width of 2nd wishbone data bus .WB2_DATA_BITS(WB2_DATA_BITS), //width of 2nd wishbone data bus
.MICRON_SIM(MICRON_SIM), //simulation for micron ddr3 model (shorten POWER_ON_RESET_HIGH and INITIAL_CKE_LOW) .MICRON_SIM(MICRON_SIM), //simulation for micron ddr3 model (shorten POWER_ON_RESET_HIGH and INITIAL_CKE_LOW)
.ODELAY_SUPPORTED(ODELAY_SUPPORTED), //set to 1 when ODELAYE2 is supported .ODELAY_SUPPORTED(ODELAY_SUPPORTED), //set to 1 when ODELAYE2 is supported
.SECOND_WISHBONE(SECOND_WISHBONE) //set to 1 if 2nd wishbone is needed .SECOND_WISHBONE(SECOND_WISHBONE), //set to 1 if 2nd wishbone is needed
.DIC(DIC), //Output Driver Impedance Control (2'b00 = RZQ/6, 2'b01 = RZQ/7, RZQ = 240ohms)
.RTT_NOM(RTT_NOM) //RTT Nominal (3'b000 = disabled, 3'b001 = RZQ/4, 3'b010 = RZQ/2 , 3'b011 = RZQ/6, RZQ = 240ohms)
) ddr3_controller_inst ( ) ddr3_controller_inst (
.i_controller_clk(i_controller_clk), //i_controller_clk has period of CONTROLLER_CLK_PERIOD .i_controller_clk(i_controller_clk), //i_controller_clk has period of CONTROLLER_CLK_PERIOD
.i_rst_n(i_rst_n), //200MHz input clock .i_rst_n(i_rst_n), //200MHz input clock