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[Usbdev] usbdev_env
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This is an incremental PR add new changes in Driver and Seq_item Class
Add drive data packet task in driver class
Add get response from Device task in driver class
Add crc generate task in usb20_item
Add Generate specific payload for control requestes task in usb20_item
class
Add usb packets enums in usb_agent_pkg class

Signed-off-by: Mubashir Saleem <[email protected]>
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@MubashirSaleem775
MubashirSaleem775 committed Dec 23, 2023
1 parent 6aa7fb0 commit 3ef1cbe
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Showing 3 changed files with 219 additions and 93 deletions.
21 changes: 18 additions & 3 deletions hw/dv/sv/usb20_agent/usb20_agent_pkg.sv
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Original file line number Diff line number Diff line change
Expand Up @@ -12,16 +12,31 @@ package usb20_agent_pkg;
`include "uvm_macros.svh"
`include "dv_macros.svh"

// parameters

// usb20_item enums
typedef enum bit [2:0] {PktTypeSoF, PktTypeToken, PktTypeData, PktTypeHandshake} pkt_type_e;
typedef enum bit [7:0] {PidTypeOutToken = 8'b0001_1110, PidTypeInToken = 8'b1001_0110,
PidTypeSofToken = 8'b0101_1010, PidTypeSetupToken = 8'b1101_0010,
PidTypeData0 = 8'b0011_1100, PidTypeData1 = 8'b1011_0100, PidTypeData2 = 8'b0111_1000,
PidTypeMData = 8'b1111_0000, PidTypeAck = 8'b0010_1101, PidTypeNak = 8'b1010_0101,
PidTypeStall = 8'b1110_0001, PidTypeNyet = 8'b0110_1001} pid_type_e;

typedef enum byte {bmRequestType0 = 8'b0_00_00000, bmRequestType1 = 8'b0_00_00001,
bmRequestType2 = 8'b0_00_00010, bmRequestType3 = 8'b1_00_00000,
bmRequestType4 = 8'b1_00_00001, bmRequestType5 = 8'b1_00_00010} bmrequesttype_e;

typedef enum byte {bRequestGET_STATUS = 8'h00, bRequestCLEAR_FEATURE = 8'h01,
bRequestSET_FEATURE = 8'h03, bRequestSET_ADDRESS = 8'h05, bRequestGET_DESCRIPTOR = 8'h06,
bRequestSET_DESCRIPTOR = 8'h07, bRequestGET_CONFIGURATION = 8'h08,
bRequestSET_CONFIGURATION = 8'h09, bRequestGET_INTERFACE = 8'h0A,
bRequestSET_INTERFACE = 8'h0B, bRequestSYNCH_FRAME = 8'h0C} brequest_e;
// local types
// forward declare classes to allow typedefs below
typedef class usb20_item;
typedef class usb20_agent_cfg;

// reuse dv_base_seqeuencer as is with the right parameter set
typedef dv_base_sequencer #(.ITEM_T (usb20_item),
.CFG_T (usb20_agent_cfg)) usb20_sequencer;
.CFG_T (usb20_agent_cfg)) usb20_sequencer;

// functions

Expand Down
175 changes: 110 additions & 65 deletions hw/dv/sv/usb20_agent/usb20_driver.sv
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Original file line number Diff line number Diff line change
Expand Up @@ -2,12 +2,12 @@
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0


class usb20_driver extends dv_base_driver #(usb20_item, usb20_agent_cfg);
`uvm_component_utils(usb20_driver)

`uvm_component_new
int usb_rst_time =100_000; // upto 10ms

int usb_rst_time = 100_000; // upto 10ms
int usb_idle_clk_cycles = 5;
bit [7:0] SYNC_PATTERN = 8'b1000_0000;
bit [1:0] EOP = 2'b00;
Expand All @@ -17,8 +17,8 @@ class usb20_driver extends dv_base_driver #(usb20_item, usb20_agent_cfg);

function void build_phase(uvm_phase phase);
super.build_phase(phase);
if (!uvm_config_db#(virtual usb20_block_if)::get(this, "*.env.m_usb20_agent*", "bif", cfg.bif))
begin
if (!uvm_config_db#(virtual usb20_block_if)::get(this, "*.env.m_usb20_agent*",
"bif", cfg.bif)) begin
`uvm_fatal(`gfn, "Failed to get usb20_block_if handle from uvm_config_db")
end
endfunction
Expand All @@ -36,25 +36,24 @@ class usb20_driver extends dv_base_driver #(usb20_item, usb20_agent_cfg);
usb20_item seq_item;
usb20_item rsp_item;
forever begin
if( cfg.if_mode == Host) begin
if (cfg.if_mode == Host) begin
seq_item_port.get_next_item(seq_item);
$cast(rsp_item,seq_item.clone());
$cast(rsp_item, seq_item.clone());
rsp_item.set_id_info(seq_item);
if (seq_item.m_pkt_type==PktTypeToken) begin
if (seq_item.m_pkt_type == PktTypeToken) begin
prepare_token_packet(seq_item, rsp_item);
end else if (seq_item.m_pkt_type== PktTypeData) begin
end else if (seq_item.m_pkt_type == PktTypeData) begin
prepare_data_packet(seq_item, rsp_item);
end else if (seq_item.m_pkt_type == PktTypeHandshake) begin
prepare_handshake_packet(seq_item, rsp_item);
end else if (seq_item.m_pkt_type== PktTypeSoF) begin
prepare_sof_packet( seq_item, rsp_item);
end else if (seq_item.m_pkt_type == PktTypeSoF) begin
prepare_sof_packet(seq_item, rsp_item);
end
end
end
endtask


task prepare_token_packet( usb20_item seq_item, usb20_item rsp_item);
task prepare_token_packet(usb20_item seq_item, usb20_item rsp_item);
bit driver_token_pkt[];
bit comp_token_pkt[];
$cast(m_token_pkt, seq_item);
Expand All @@ -67,16 +66,22 @@ class usb20_driver extends dv_base_driver #(usb20_item, usb20_agent_cfg);
m_token_pkt.crc5 = {<<{m_token_pkt.crc5}};
m_token_pkt.pack(driver_token_pkt);
// to make complete packet need to attach SYNC at start of packet
comp_token_pkt = new[driver_token_pkt.size() +8];
for (int i = 0; i < 8; i = i + 1) begin
comp_token_pkt = new[driver_token_pkt.size() + 8];
for (int i = 0; i < 8; i++) begin
comp_token_pkt[i] = SYNC_PATTERN[i];
end
for (int i = 0; i < driver_token_pkt.size(); i = i + 1) begin
for (int i = 0; i < driver_token_pkt.size(); i++) begin
comp_token_pkt[i + 8] = driver_token_pkt[i];
end
`uvm_info(`gfn, $sformatf(" Complete Token_Packet=%p", comp_token_pkt), UVM_LOW)
`uvm_info(`gfn, $sformatf("Complete Token_Packet = %p", comp_token_pkt), UVM_DEBUG)
drive_pkt(comp_token_pkt);
seq_item_port.item_done();
if (seq_item.m_pid_type == PidTypeInToken) begin
get_dut_response(rsp_item);
seq_item_port.item_done(rsp_item);
`uvm_info (`gfn, $sformatf("In drive afer In packet : \n %0s", rsp_item.sprint()), UVM_DEBUG)
end else begin
seq_item_port.item_done();
end
endtask

task prepare_data_packet (usb20_item seq_item, usb20_item rsp_item);
Expand All @@ -87,20 +92,23 @@ class usb20_driver extends dv_base_driver #(usb20_item, usb20_agent_cfg);
// Modified each field of the packet to start with the Least Significant Bit (LSB)
m_data_pkt.m_pid_type = {<<4{m_data_pkt.m_pid_type}};
m_data_pkt.m_pid_type = {<<{m_data_pkt.m_pid_type}};
m_data_pkt.data = {<<8{m_data_pkt.data}};
m_data_pkt.data = {<<{m_data_pkt.data}};
m_data_pkt.crc16 = {<<{m_data_pkt.crc16}};
m_data_pkt.pack(driver_data_pkt);
`uvm_info(`gfn, $sformatf(" Driver Data_Packet=%p", driver_data_pkt), UVM_LOW)
// to make complete packet need to attach SYNC at start of packet
comp_data_pkt = new[driver_data_pkt.size() +8];
for (int i = 0; i < 8; i = i + 1) begin
`uvm_info(`gfn, $sformatf("Driver Data_Packet = %p", driver_data_pkt), UVM_DEBUG)
// To make complete packet need to attach SYNC at start of packet
comp_data_pkt = new[driver_data_pkt.size() + 8];
for (int i = 0; i < 8; i++) begin
comp_data_pkt[i] = SYNC_PATTERN[i];
end
for (int i = 0; i < driver_data_pkt.size(); i = i + 1) begin
for (int i = 0; i < driver_data_pkt.size(); i++) begin
comp_data_pkt[i + 8] = driver_data_pkt[i];
end
`uvm_info(`gfn, $sformatf(" Complete Data_Packet=%p", comp_data_pkt), UVM_LOW)
`uvm_info(`gfn, $sformatf("Complete Data_Packet = %p", comp_data_pkt), UVM_DEBUG)
drive_pkt(comp_data_pkt);
seq_item_port.item_done();
get_dut_response(rsp_item);
seq_item_port.item_done(rsp_item);
endtask

task prepare_handshake_packet(usb20_item seq_item, usb20_item rsp_item);
Expand All @@ -110,83 +118,82 @@ class usb20_driver extends dv_base_driver #(usb20_item, usb20_agent_cfg);
m_handshake_pkt.m_pid_type = {<<4{m_handshake_pkt.m_pid_type}};
m_handshake_pkt.m_pid_type = {<<{m_handshake_pkt.m_pid_type}};
m_handshake_pkt.pack(driver_handshake_pkt);
`uvm_info(`gfn, $sformatf("Driver Handshake_Packet=%p", driver_handshake_pkt), UVM_LOW)
// to make complete packet need to attach SYNC at start of packet
comp_handshake_pkt = new[driver_handshake_pkt.size() +8];
for (int i = 0; i < 8; i = i + 1) begin
`uvm_info(`gfn, $sformatf("Driver Handshake_Packet = %p", driver_handshake_pkt), UVM_DEBUG)
// To make complete packet need to attach SYNC at start of packet
comp_handshake_pkt = new[driver_handshake_pkt.size() + 8];
for (int i = 0; i < 8; i++) begin
comp_handshake_pkt[i] = SYNC_PATTERN[i];
end
for (int i = 0; i < driver_handshake_pkt.size(); i = i + 1) begin
for (int i = 0; i < driver_handshake_pkt.size(); i++) begin
comp_handshake_pkt[i + 8] = driver_handshake_pkt[i];
end
`uvm_info(`gfn, $sformatf(" Complete Handshake_Packet=%p", comp_handshake_pkt), UVM_LOW)
`uvm_info(`gfn, $sformatf("Complete Handshake_Packet = %p", comp_handshake_pkt), UVM_DEBUG)
drive_pkt(comp_handshake_pkt);
seq_item_port.item_done();
endtask

task prepare_sof_packet( usb20_item seq_item, usb20_item rsp_item);
//TODO: Drive method to drive SOF packet
// TODO: Drive method to drive SOF packet
endtask

task drive_pkt(bit comp_pkt[]);
bit nrzi_out[];

bit bit_stuff_out[];
// Bit Stuffing performed on packet
bit_stuffing(comp_pkt);

bit_stuffing(comp_pkt, bit_stuff_out);
`uvm_info(`gfn, $sformatf("Complete Packet after BIT STUFFING = %p", bit_stuff_out), UVM_DEBUG)
// NRZI Implementation
nrzi_encoder(comp_pkt,nrzi_out);
`uvm_info(`gfn, $sformatf(" Complete Packet after NRZI=%p", nrzi_out), UVM_LOW)
nrzi_encoder(bit_stuff_out, nrzi_out);
`uvm_info(`gfn, $sformatf("Complete Packet after NRZI = %p", nrzi_out), UVM_DEBUG)
// Loop to drive packet bit by bit
for (int i=0; i < nrzi_out.size(); i= i + 1) begin
for (int i = 0; i < nrzi_out.size(); i++) begin
@(posedge cfg.bif.usb_clk) begin
cfg.bif.drive_p = nrzi_out[i];
cfg.bif.drive_n = ~nrzi_out[i];
end
end
end_of_packet();
// seq_item_port.item_done();
endtask

// EOP Task
// EOP Task
// -------------------------------
task end_of_packet();
for (int j =0; j <2; j=j+1) begin
for (int j = 0; j < 2; j++) begin
@(posedge cfg.bif.usb_clk)
cfg.bif.drive_p = EOP[j];
cfg.bif.drive_n = EOP[j];
end
@(posedge cfg.bif.usb_clk) begin
`uvm_info(`gfn, "\n After EOP Idle state", UVM_LOW)
`uvm_info(`gfn, "\n After EOP Idle state", UVM_DEBUG)
cfg.bif.drive_p = 1'b1;
cfg.bif.drive_n = 1'b0;
end
endtask

// Bit Stuffing Task
// -------------------------------
task bit_stuffing(input bit packet[]);
task bit_stuffing(input bit packet[], output bit bit_stuff_out[]);
int consecutive_ones_count = 0;
for (int i = 0; i < packet.size(); i++) begin
if (packet[i] == 1'b1) begin
consecutive_ones_count = consecutive_ones_count +1;
consecutive_ones_count = consecutive_ones_count + 1;
if (consecutive_ones_count == 6) begin
packet = new [packet.size() +1] (packet);
packet = new[packet.size() + 1](packet);
for (int j = packet.size() ; j > i; j = j - 1) begin
packet[j] = packet[j - 1];
end
i=i+1;
i = i + 1;
packet[i] = 1'b0;
consecutive_ones_count = 0;
end
end else if (packet[i] ==1'b0) begin
consecutive_ones_count =0;
end
end else if (packet[i] == 1'b0) begin
consecutive_ones_count = 0;
end
end
`uvm_info(`gfn, $sformatf("Bit_stuffing result: %p", packet), UVM_LOW)
bit_stuff_out = packet;
endtask

// NRZI Encoding Task
// NRZI Encoding/Decoding Task
// -------------------------------

task nrzi_encoder(input bit packet[], output bit nrzi_out[]);
Expand All @@ -202,46 +209,84 @@ class usb20_driver extends dv_base_driver #(usb20_item, usb20_agent_cfg);
end
endtask

task nrzi_decoder(input bit nrzi_in[], output bit decoded_packet[]);
bit prev_bit = 1'b1;
decoded_packet = new[nrzi_in.size()];
for (int i = 0; i < nrzi_in.size(); i++) begin
if (nrzi_in[i] == prev_bit) begin
// If the current NRZI bit matches the previous bit, it's a 0.
decoded_packet[i] = 1'b1;
end else begin
// If the current NRZI bit is different from the previous bit, it's a 1.
decoded_packet[i] = 1'b0;
end
prev_bit = nrzi_in[i];
end
endtask

// RESET signals Task
// -------------------------------
virtual task reset_signals();
virtual task reset_signals();
cfg.bif.usb_rx_d_i = 1'b1;
cfg.bif.usb_vbus = 1'b1;
cfg.bif.drive_p =1'b1;
cfg.bif.drive_n =1'b1;
cfg.bif.drive_p = 1'b1;
cfg.bif.drive_n = 1'b1;
@(posedge cfg.bif.rst_ni);
`uvm_info(`gfn, "\n Hardware Reset in Progress", UVM_LOW)
`uvm_info(`gfn, "Hardware Reset in Progress", UVM_DEBUG)
cfg.bif.usb_vbus = 1'b0;
cfg.bif.drive_p = 1'bz;
cfg.bif.drive_n = 1'bz;
repeat(usb_idle_clk_cycles) @(posedge cfg.bif.usb_clk);
cfg.bif.usb_vbus = 1'b1;
cfg.bif.drive_p = 1'b1;
cfg.bif.drive_n = 1'b0;
`uvm_info(`gfn, "\n Out of Hardware Reset", UVM_LOW)
`uvm_info(`gfn, "Out of Hardware Reset", UVM_DEBUG)
bus_reset();
endtask

// USB Bus Reset Task
// -------------------------------
task bus_reset();
`uvm_info(`gfn, "\n USB Bus Reset Started", UVM_LOW)
@(posedge cfg.bif.usb_clk)
cfg.bif.drive_p =1'b1;
cfg.bif.drive_n =1'b0;
cfg.bif.drive_p = 1'b1;
cfg.bif.drive_n = 1'b0;
// Waitfor device active state
`DV_SPINWAIT(wait(cfg.bif.usb_dp_pullup_o == 1'b1);,"timeout waiting for usb_pullup", 500_000)
`uvm_info(`gfn, "\n BUS is in reset phase", UVM_LOW)
`DV_SPINWAIT(wait(cfg.bif.usb_dp_pullup_o);, "timeout waiting for usb_pullup", 500_000)
@(posedge cfg.bif.usb_clk)
cfg.bif.drive_p =1'b0;
cfg.bif.drive_n =1'b0;
cfg.bif.drive_p = 1'b0;
cfg.bif.drive_n = 1'b0;
// Reset bus or drive 0 on both DP and DN for 10ms
repeat(usb_rst_time) @(posedge cfg.bif.usb_clk);
`uvm_info(`gfn, "\n Reset for 10ms completed", UVM_LOW)
`uvm_info(`gfn, "Reset for 10ms completed", UVM_DEBUG)
// After reset change state to IDLE
@(posedge cfg.bif.usb_clk)
cfg.bif.drive_p =1'b1;
cfg.bif.drive_n =1'b0;
cfg.bif.drive_p = 1'b1;
cfg.bif.drive_n = 1'b0;
repeat(usb_idle_clk_cycles) @(posedge cfg.bif.usb_clk);
endtask

// Get_DUT_Response
// -------------------------------
task get_dut_response(usb20_item rsp_item);
bit received_pkt[];
bit decoded_received_pkt[];
int receive_index = 0;
bit [7:0] received_pid = 0;
`uvm_info(`gfn, "After drive Packet in wait to check usb_dp_en_o signal", UVM_DEBUG)
wait(cfg.bif.usb_dp_en_o);
while (cfg.bif.usb_dp_en_o) begin
received_pkt = new[received_pkt.size() + 1](received_pkt);
@(posedge cfg.bif.usb_clk)
received_pkt[receive_index] = cfg.bif.usb_p;
receive_index = receive_index + 1;
end
`uvm_info(`gfn, $sformatf("Received Packet = %p", received_pkt), UVM_LOW)
nrzi_decoder (received_pkt, decoded_received_pkt);
`uvm_info(`gfn, $sformatf("Decoded Received Packet = %p", decoded_received_pkt), UVM_LOW)
for (int i = 0 ; i < 8; i++) begin
received_pid[i] = decoded_received_pkt[i + 8];
end
received_pid = {<<4{received_pid}};
rsp_item.m_pid_type = received_pid;
endtask
endclass
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