//
// Copyright 2013 Ettus Research LLC
//
/***********************************************************
* B200 Core Guts
**********************************************************/
module b200_core
#(
parameter R0_CTRL_SID = 8'h10,
parameter R1_CTRL_SID = 8'h20,
parameter U0_CTRL_SID = 8'h30,
parameter L0_CTRL_SID = 8'h40,
parameter R0_DATA_SID = 8'h50,
parameter R1_DATA_SID = 8'h60,
parameter DEMUX_SID_MASK = 8'hf0,
parameter EXTRA_BUFF_SIZE = 0
)
(
////////////////////////////////////////////////////////////////////
// bus interfaces
////////////////////////////////////////////////////////////////////
input bus_clk,
input bus_rst,
input [63:0] tx_tdata, input tx_tlast, input tx_tvalid, output tx_tready,
output [63:0] rx_tdata, output rx_tlast, output rx_tvalid, input rx_tready,
input [63:0] ctrl_tdata, input ctrl_tlast, input ctrl_tvalid, output ctrl_tready,
output [63:0] resp_tdata, output resp_tlast, output resp_tvalid, input resp_tready,
////////////////////////////////////////////////////////////////////
// radio interfaces
////////////////////////////////////////////////////////////////////
input radio_clk,
input radio_rst,
input [31:0] rx0, input [31:0] rx1,
output [31:0] tx0, output [31:0] tx1,
inout [31:0] fe_atr0,
inout [31:0] fe_atr1,
input pps_int, input pps_ext,
////////////////////////////////////////////////////////////////////
// gpsdo uart
////////////////////////////////////////////////////////////////////
input rxd,
output txd,
////////////////////////////////////////////////////////////////////
// core interfaces
////////////////////////////////////////////////////////////////////
output [7:0] sen, output sclk, output mosi, input miso,
input [31:0] rb_misc,
output [31:0] misc_outs,
output [31:0] debug
);
localparam SR_CORE_SPI = 8'd8;
localparam SR_CORE_MISC = 8'd16;
localparam SR_CORE_COMPAT = 8'd24;
localparam SR_CORE_READBACK = 8'd32;
localparam SR_CORE_GPSDO_ST = 8'd40;
localparam SR_CORE_PPS_SEL = 8'd48;
localparam COMPAT_MAJOR = 16'h0002;
localparam COMPAT_MINOR = 16'h0000;
/*******************************************************************
* PPS Timing stuff
******************************************************************/
reg [1:0] int_pps_del, ext_pps_del;
always @(posedge radio_clk) ext_pps_del[1:0] <= {ext_pps_del[0], pps_ext};
always @(posedge radio_clk) int_pps_del[1:0] <= {int_pps_del[0], pps_int};
wire pps_select;
wire pps = pps_select? ext_pps_del[1] : int_pps_del[1];
/*******************************************************************
* Response mux Routing logic
******************************************************************/
wire [63:0] r0_resp_tdata; wire r0_resp_tlast, r0_resp_tvalid, r0_resp_tready;
wire [63:0] r1_resp_tdata; wire r1_resp_tlast, r1_resp_tvalid, r1_resp_tready;
wire [63:0] u0_resp_tdata; wire u0_resp_tlast, u0_resp_tvalid, u0_resp_tready;
wire [63:0] l0_resp_tdata; wire l0_resp_tlast, l0_resp_tvalid, l0_resp_tready;
axi_mux4 #(.WIDTH(64), .BUFFER(1)) mux_for_resp
(.clk(bus_clk), .reset(bus_rst), .clear(1'b0),
.i0_tdata(r0_resp_tdata), .i0_tlast(r0_resp_tlast), .i0_tvalid(r0_resp_tvalid), .i0_tready(r0_resp_tready),
.i1_tdata(r1_resp_tdata), .i1_tlast(r1_resp_tlast), .i1_tvalid(r1_resp_tvalid), .i1_tready(r1_resp_tready),
.i2_tdata(u0_resp_tdata), .i2_tlast(u0_resp_tlast), .i2_tvalid(u0_resp_tvalid), .i2_tready(u0_resp_tready),
.i3_tdata(l0_resp_tdata), .i3_tlast(l0_resp_tlast), .i3_tvalid(l0_resp_tvalid), .i3_tready(l0_resp_tready),
.o_tdata(resp_tdata), .o_tlast(resp_tlast), .o_tvalid(resp_tvalid), .o_tready(resp_tready));
/*******************************************************************
* Control demux Routing logic
******************************************************************/
wire [63:0] r0_ctrl_tdata; wire r0_ctrl_tlast, r0_ctrl_tvalid, r0_ctrl_tready;
wire [63:0] r1_ctrl_tdata; wire r1_ctrl_tlast, r1_ctrl_tvalid, r1_ctrl_tready;
wire [63:0] u0_ctrl_tdata; wire u0_ctrl_tlast, u0_ctrl_tvalid, u0_ctrl_tready;
wire [63:0] l0_ctrl_tdata; wire l0_ctrl_tlast, l0_ctrl_tvalid, l0_ctrl_tready;
wire [63:0] ctrl_hdr;
wire [1:0] ctrl_dst =
((ctrl_hdr[7:0] & DEMUX_SID_MASK) == R0_CTRL_SID)? 0 : (
((ctrl_hdr[7:0] & DEMUX_SID_MASK) == R1_CTRL_SID)? 1 : (
((ctrl_hdr[7:0] & DEMUX_SID_MASK) == U0_CTRL_SID)? 2 : (
((ctrl_hdr[7:0] & DEMUX_SID_MASK) == L0_CTRL_SID)? 3 : (
3))));
axi_demux4 #(.ACTIVE_CHAN(4'b1111), .WIDTH(64), .BUFFER(1)) demux_for_ctrl
(.clk(bus_clk), .reset(bus_rst), .clear(1'b0),
.header(ctrl_hdr), .dest(ctrl_dst),
.i_tdata(ctrl_tdata), .i_tlast(ctrl_tlast), .i_tvalid(ctrl_tvalid), .i_tready(ctrl_tready),
.o0_tdata(r0_ctrl_tdata), .o0_tlast(r0_ctrl_tlast), .o0_tvalid(r0_ctrl_tvalid), .o0_tready(r0_ctrl_tready),
.o1_tdata(r1_ctrl_tdata), .o1_tlast(r1_ctrl_tlast), .o1_tvalid(r1_ctrl_tvalid), .o1_tready(r1_ctrl_tready),
.o2_tdata(u0_ctrl_tdata), .o2_tlast(u0_ctrl_tlast), .o2_tvalid(u0_ctrl_tvalid), .o2_tready(u0_ctrl_tready),
.o3_tdata(l0_ctrl_tdata), .o3_tlast(l0_ctrl_tlast), .o3_tvalid(l0_ctrl_tvalid), .o3_tready(l0_ctrl_tready));
/*******************************************************************
* UART
******************************************************************/
wire [63:0] u0i_ctrl_tdata; wire u0i_ctrl_tlast, u0i_ctrl_tvalid, u0i_ctrl_tready;
axi_fifo #(.WIDTH(65), .SIZE(0)) ushart_timing_fifo
(
.clk(bus_clk), .reset(bus_rst), .clear(1'b0),
.i_tdata({u0_ctrl_tlast, u0_ctrl_tdata}), .i_tvalid(u0_ctrl_tvalid), .i_tready(u0_ctrl_tready), .space(),
.o_tdata({u0i_ctrl_tlast, u0i_ctrl_tdata}), .o_tvalid(u0i_ctrl_tvalid), .o_tready(u0i_ctrl_tready), .occupied()
);
cvita_uart #(.SIZE(7)) ushart
(
.clk(bus_clk), .rst(bus_rst), .rxd(rxd), .txd(txd),
.i_tdata(u0i_ctrl_tdata), .i_tlast(u0i_ctrl_tlast), .i_tvalid(u0i_ctrl_tvalid), .i_tready(u0i_ctrl_tready),
.o_tdata(u0_resp_tdata), .o_tlast(u0_resp_tlast), .o_tvalid(u0_resp_tvalid), .o_tready(u0_resp_tready)
);
/*******************************************************************
* Misc controls
******************************************************************/
wire set_stb;
wire [7:0] set_addr;
wire [31:0] set_data;
wire spi_ready;
wire [31:0] spi_readback;
wire [7:0] gpsdo_st;
wire [7:0] radio_st;
wire [1:0] rb_addr;
reg [63:0] rb_data;
wire [63:0] l0i_ctrl_tdata; wire l0i_ctrl_tlast, l0i_ctrl_tvalid, l0i_ctrl_tready;
axi_fifo #(.WIDTH(65), .SIZE(0)) radio_ctrl_proc_timing_fifo
(
.clk(bus_clk), .reset(bus_rst), .clear(1'b0),
.i_tdata({l0_ctrl_tlast, l0_ctrl_tdata}), .i_tvalid(l0_ctrl_tvalid), .i_tready(l0_ctrl_tready), .space(),
.o_tdata({l0i_ctrl_tlast, l0i_ctrl_tdata}), .o_tvalid(l0i_ctrl_tvalid), .o_tready(l0i_ctrl_tready), .occupied()
);
radio_ctrl_proc radio_ctrl_proc
(.clk(bus_clk), .reset(bus_rst), .clear(1'b0),
.ctrl_tdata(l0i_ctrl_tdata), .ctrl_tlast(l0i_ctrl_tlast), .ctrl_tvalid(l0i_ctrl_tvalid), .ctrl_tready(l0i_ctrl_tready),
.resp_tdata(l0_resp_tdata), .resp_tlast(l0_resp_tlast), .resp_tvalid(l0_resp_tvalid), .resp_tready(l0_resp_tready),
.vita_time(64'b0),
.set_stb(set_stb), .set_addr(set_addr), .set_data(set_data),
.ready(spi_ready), .readback(rb_data),
.debug());
setting_reg #(.my_addr(SR_CORE_MISC), .awidth(8), .width(32), .at_reset(8'h0)) sr_misc
(.clk(bus_clk), .rst(bus_rst), .strobe(set_stb), .addr(set_addr), .in(set_data),
.out(misc_outs), .changed());
setting_reg #(.my_addr(SR_CORE_READBACK), .awidth(8), .width(2)) sr_rdback
(.clk(bus_clk), .rst(bus_rst), .strobe(set_stb), .addr(set_addr), .in(set_data),
.out(rb_addr), .changed());
setting_reg #(.my_addr(SR_CORE_GPSDO_ST), .awidth(8), .width(8)) sr_gpsdo_st
(.clk(bus_clk), .rst(1'b0/*keep*/), .strobe(set_stb), .addr(set_addr), .in(set_data),
.out(gpsdo_st), .changed());
setting_reg #(.my_addr(SR_CORE_PPS_SEL), .awidth(8), .width(1)) sr_pps_sel
(.clk(bus_clk), .rst(bus_rst), .strobe(set_stb), .addr(set_addr), .in(set_data),
.out(pps_select), .changed());
simple_spi_core #(.BASE(SR_CORE_SPI), .WIDTH(8), .CLK_IDLE(0), .SEN_IDLE(8'hFF)) misc_spi
(.clock(bus_clk), .reset(bus_rst),
.set_stb(set_stb), .set_addr(set_addr), .set_data(set_data),
.readback(spi_readback), .ready(spi_ready),
.sen(sen), .sclk(sclk), .mosi(mosi), .miso(miso),
.debug());
always @*
case(rb_addr)
2'd0 : rb_data <= { 32'hACE0BA5E, COMPAT_MAJOR, COMPAT_MINOR };
2'd1 : rb_data <= { 32'b0, spi_readback };
2'd2 : rb_data <= { 16'b0, radio_st, gpsdo_st, rb_misc };
default : rb_data <= 64'd0;
endcase // case (rb_addr)
/*******************************************************************
* RX Data mux Routing logic
******************************************************************/
wire [63:0] r0_rx_tdata; wire r0_rx_tlast, r0_rx_tvalid, r0_rx_tready;
wire [63:0] r1_rx_tdata; wire r1_rx_tlast, r1_rx_tvalid, r1_rx_tready;
wire [63:0] rx_tdata_int; wire rx_tlast_int, rx_tvalid_int, rx_tready_int;
axi_mux4 #(.WIDTH(64), .BUFFER(1)) mux_for_rx
(.clk(bus_clk), .reset(bus_rst), .clear(1'b0),
.i0_tdata(r0_rx_tdata), .i0_tlast(r0_rx_tlast), .i0_tvalid(r0_rx_tvalid), .i0_tready(r0_rx_tready),
.i1_tdata(r1_rx_tdata), .i1_tlast(r1_rx_tlast), .i1_tvalid(r1_rx_tvalid), .i1_tready(r1_rx_tready),
.i2_tdata(64'b0), .i2_tlast(1'b0), .i2_tvalid(1'b0), .i2_tready(),
.i3_tdata(64'b0), .i3_tlast(1'b0), .i3_tvalid(1'b0), .i3_tready(),
.o_tdata(rx_tdata_int), .o_tlast(rx_tlast_int), .o_tvalid(rx_tvalid_int), .o_tready(rx_tready_int));
axi_fifo #(.WIDTH(65), .SIZE(EXTRA_BUFF_SIZE)) extra_rx_buff
(.clk(bus_clk), .reset(bus_rst),
.i_tdata({rx_tlast_int, rx_tdata_int}), .i_tvalid(rx_tvalid_int), .i_tready(rx_tready_int),
.o_tdata({rx_tlast, rx_tdata}), .o_tvalid(rx_tvalid), .o_tready(rx_tready));
/*******************************************************************
* TX Data mux Routing logic
******************************************************************/
wire [63:0] r0_tx_tdata; wire r0_tx_tlast, r0_tx_tvalid, r0_tx_tready;
wire [63:0] r1_tx_tdata; wire r1_tx_tlast, r1_tx_tvalid, r1_tx_tready;
wire [63:0] tx_tdata_int; wire tx_tlast_int, tx_tvalid_int, tx_tready_int;
axi_fifo #(.WIDTH(65), .SIZE(EXTRA_BUFF_SIZE)) extra_tx_buff
(.clk(bus_clk), .reset(bus_rst),
.i_tdata({tx_tlast, tx_tdata}), .i_tvalid(tx_tvalid), .i_tready(tx_tready),
.o_tdata({tx_tlast_int, tx_tdata_int}), .o_tvalid(tx_tvalid_int), .o_tready(tx_tready_int));
wire [63:0] tx_hdr;
wire [1:0] tx_dst =
((tx_hdr[7:0] & DEMUX_SID_MASK) == R0_DATA_SID)? 0 : (
((tx_hdr[7:0] & DEMUX_SID_MASK) == R1_DATA_SID)? 1 : (
3));
axi_demux4 #(.ACTIVE_CHAN(4'b0011), .WIDTH(64), .BUFFER(1)) demux_for_tx
(.clk(bus_clk), .reset(bus_rst), .clear(1'b0),
.header(tx_hdr), .dest(tx_dst),
.i_tdata(tx_tdata_int), .i_tlast(tx_tlast_int), .i_tvalid(tx_tvalid_int), .i_tready(tx_tready_int),
.o0_tdata(r0_tx_tdata), .o0_tlast(r0_tx_tlast), .o0_tvalid(r0_tx_tvalid), .o0_tready(r0_tx_tready),
.o1_tdata(r1_tx_tdata), .o1_tlast(r1_tx_tlast), .o1_tvalid(r1_tx_tvalid), .o1_tready(r1_tx_tready),
.o2_tdata(), .o2_tlast(), .o2_tvalid(), .o2_tready(1'b1),
.o3_tdata(), .o3_tlast(), .o3_tvalid(), .o3_tready(1'b1));
/*******************************************************************
* Radio 0
******************************************************************/
radio_b200 #(.FIFO_SIZE(13)) the_radio
(
.radio_clk(radio_clk), .radio_rst(radio_rst),
.rx(rx0), .tx(tx0), .fe_atr(fe_atr0), .pps(pps),
.bus_clk(bus_clk), .bus_rst(bus_rst),
.tx_tdata(r0_tx_tdata), .tx_tlast(r0_tx_tlast), .tx_tvalid(r0_tx_tvalid), .tx_tready(r0_tx_tready),
.rx_tdata(r0_rx_tdata), .rx_tlast(r0_rx_tlast), .rx_tvalid(r0_rx_tvalid), .rx_tready(r0_rx_tready),
.ctrl_tdata(r0_ctrl_tdata), .ctrl_tlast(r0_ctrl_tlast), .ctrl_tvalid(r0_ctrl_tvalid), .ctrl_tready(r0_ctrl_tready),
.resp_tdata(r0_resp_tdata), .resp_tlast(r0_resp_tlast), .resp_tvalid(r0_resp_tvalid), .resp_tready(r0_resp_tready),
.debug()
);
/*******************************************************************
* Radio 1
******************************************************************/
`ifdef B200_CAN_HAZ_R1
assign radio_st = 8'h2;
radio_b200 #(.FIFO_SIZE(13)) the_radio_1
(
.radio_clk(radio_clk), .radio_rst(radio_rst),
.rx(rx1), .tx(tx1), .fe_atr(fe_atr1), .pps(pps),
.bus_clk(bus_clk), .bus_rst(bus_rst),
.tx_tdata(r1_tx_tdata), .tx_tlast(r1_tx_tlast), .tx_tvalid(r1_tx_tvalid), .tx_tready(r1_tx_tready),
.rx_tdata(r1_rx_tdata), .rx_tlast(r1_rx_tlast), .rx_tvalid(r1_rx_tvalid), .rx_tready(r1_rx_tready),
.ctrl_tdata(r1_ctrl_tdata), .ctrl_tlast(r1_ctrl_tlast), .ctrl_tvalid(r1_ctrl_tvalid), .ctrl_tready(r1_ctrl_tready),
.resp_tdata(r1_resp_tdata), .resp_tlast(r1_resp_tlast), .resp_tvalid(r1_resp_tvalid), .resp_tready(r1_resp_tready),
.debug()
);
`else
assign radio_st = 8'h1;
//assign undriven outputs
assign fe_atr1 = 8'b0;
assign tx1 = 32'b0;
//unused control signals -- leave in loopback
assign r1_resp_tdata = r1_ctrl_tdata;
assign r1_resp_tlast = r1_ctrl_tlast;
assign r1_resp_tvalid = r1_ctrl_tvalid;
assign r1_ctrl_tready = r1_resp_tready;
//unused data signals -- leave in loopback
assign r1_rx_tdata = r1_tx_tdata;
assign r1_rx_tlast = r1_tx_tlast;
assign r1_rx_tvalid = r1_tx_tvalid;
assign r1_tx_tready = r1_tx_tready;
`endif
endmodule // b200_core