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-rw-r--r--usrp2/gpif/gpif.v151
-rw-r--r--usrp2/gpif/gpif_rd.v40
-rw-r--r--usrp2/gpif/gpif_wr.v28
3 files changed, 118 insertions, 101 deletions
diff --git a/usrp2/gpif/gpif.v b/usrp2/gpif/gpif.v
index 9609a5000..bd813126f 100644
--- a/usrp2/gpif/gpif.v
+++ b/usrp2/gpif/gpif.v
@@ -17,122 +17,93 @@ module gpif
output [35:0] tx_data_o, output tx_src_rdy_o, input tx_dst_rdy_i,
input [35:0] rx_data_i, input rx_src_rdy_i, output rx_dst_rdy_o,
- input [15:0] tx_frame_len, output [15:0] rx_frame_len,
-
output [31:0] debug
);
wire WR = gpif_ctl[0];
wire RD = gpif_ctl[1];
wire OE = gpif_ctl[2];
-
- gpif_wr gpif_wr
- (.gpif_clk(gpif_clk), .gpif_rst(gpif_rst),
- .gpif_data(), .WR(WR), .have_space(gpif_rdy[0]),
- .sys_clk(sys_clk), .sys_rst(sys_rst),
- .data_o(data_o), .src_rdy_o(), .dst_rdy_i(),
- .debug() );
-
-
-endmodule // gpif
-/*
- wire EM_output_enable = (~EM_NOE & (~EM_NCS4 | ~EM_NCS6));
- wire [15:0] EM_D_fifo;
- wire [15:0] EM_D_wb;
+ wire [15:0] gpif_dat_out;
+ assign gpif_dat = OE ? gpif_dat_out : 16'bz;
- wire bus_error_tx, bus_error_rx;
+ // ////////////////////////////////////////////////////////////////////
+ // TX Side
- always @(posedge fifo_clk)
- if(fifo_rst)
- bus_error <= 0;
- else
- bus_error <= bus_error_tx | bus_error_rx;
+ wire [18:0] tx19_data;
+ wire tx19_src_rdy, tx19_dst_rdy;
+ wire [35:0] tx36_data, tx36b_data, tx36c_data;
+ wire tx36_src_rdy, tx36_dst_rdy, tx36b_src_rdy, tx36b_dst_rdy, tx36c_src_rdy, tx36c_dst_rdy;
+ wire [35:0] ctrl_data;
+ wire ctrl_src_rdy, ctrl_dst_rdy;
- // CS4 is RAM_2PORT for DATA PATH (high-speed data)
- // Writes go into one RAM, reads come from the other
- // CS6 is for CONTROL PATH (wishbone)
-
- // ////////////////////////////////////////////
- // TX Data Path
+ gpif_wr gpif_wr
+ (.gpif_clk(gpif_clk), .gpif_rst(gpif_rst),
+ .gpif_data(gpif_d), .gpif_wr(WR), .have_space(gpif_rdy[0]),
+ .sys_clk(fifo_clk), .sys_rst(fifo_rst),
+ .data_o(tx19_data), .src_rdy_o(tx19_src_rdy), .dst_rdy_i(tx_19_dst_rdy),
+ .debug() );
- wire [17:0] tx18_data, tx18b_data;
- wire tx18_src_rdy, tx18_dst_rdy, tx18b_src_rdy, tx18b_dst_rdy;
- wire [15:0] tx_fifo_space;
- wire [35:0] tx36_data;
- wire tx36_src_rdy, tx36_dst_rdy;
-
- gpmc_to_fifo_async gpmc_to_fifo_async
- (.EM_D(EM_D), .EM_NBE(EM_NBE), .EM_NCS(EM_NCS4), .EM_NWE(EM_NWE),
- .fifo_clk(fifo_clk), .fifo_rst(fifo_rst),
- .data_o(tx18_data), .src_rdy_o(tx18_src_rdy), .dst_rdy_i(tx18_dst_rdy),
- .frame_len(tx_frame_len), .fifo_space(tx_fifo_space), .fifo_ready(tx_have_space),
- .bus_error(bus_error_tx) );
+ fifo19_to_fifo36 #(.LE(1)) f19_to_f36
+ (.clk(fifo_clk), .reset(fifo_rst), .clear(0),
+ .f19_datain(tx19_data), .f19_src_rdy_i(tx19_src_rdy), .f19_dst_rdy_o(tx19_dst_rdy),
+ .f36_dataout(tx36_data), .f36_src_rdy_o(tx36_src_rdy), .f36_dst_rdy_i(tx36_dst_rdy));
- fifo_cascade #(.WIDTH(18), .SIZE(10)) tx_fifo
+ fifo_short #(.WIDTH(36)) tx_sfifo
(.clk(fifo_clk), .reset(fifo_rst), .clear(0),
- .datain(tx18_data), .src_rdy_i(tx18_src_rdy), .dst_rdy_o(tx18_dst_rdy), .space(tx_fifo_space),
- .dataout(tx18b_data), .src_rdy_o(tx18b_src_rdy), .dst_rdy_i(tx18b_dst_rdy), .occupied());
+ .datain(tx36_data), .src_rdy_i(tx36_src_rdy), .dst_rdy_o(tx36_dst_rdy),
+ .dataout(tx36b_data), .src_rdy_o(tx36b_src_rdy), .dst_rdy_i(tx36b_dst_rdy));
- fifo19_to_fifo36 #(.LE(1)) f19_to_f36 // Little endian because ARM is LE
+ fifo36_demux #(.match_data(32'h1000_0000), .match_mask(32'hF000_0000)) tx_demux
(.clk(fifo_clk), .reset(fifo_rst), .clear(0),
- .f19_datain({1'b0,tx18b_data}), .f19_src_rdy_i(tx18b_src_rdy), .f19_dst_rdy_o(tx18b_dst_rdy),
- .f36_dataout(tx36_data), .f36_src_rdy_o(tx36_src_rdy), .f36_dst_rdy_i(tx36_dst_rdy));
+ .data_i(tx36b_data), .src_rdy_i(tx36b_src_rdy), .dst_rdy_o(tx36b_dst_rdy),
+ .data0_o(ctrl_data), .src0_rdy_o(ctrl_src_rdy), .dst0_rdy_i(ctrl_dst_rdy),
+ .data1_o(tx36c_data), .src1_rdy_o(tx36c_src_rdy), .dst1_rdy_i(tx36c_dst_rdy));
fifo_cascade #(.WIDTH(36), .SIZE(TXFIFOSIZE)) tx_fifo36
- (.clk(wb_clk), .reset(wb_rst), .clear(0),
- .datain(tx36_data), .src_rdy_i(tx36_src_rdy), .dst_rdy_o(tx36_dst_rdy),
+ (.clk(fifo_clk), .reset(fifo_rst), .clear(0),
+ .datain(tx36c_data), .src_rdy_i(tx36c_src_rdy), .dst_rdy_o(tx36c_dst_rdy),
.dataout(tx_data_o), .src_rdy_o(tx_src_rdy_o), .dst_rdy_i(tx_dst_rdy_i));
- // ////////////////////////////////////////////
- // RX Data Path
-
- wire [17:0] rx18_data, rx18b_data;
- wire rx18_src_rdy, rx18_dst_rdy, rx18b_src_rdy, rx18b_dst_rdy;
- wire [15:0] rx_fifo_space;
- wire [35:0] rx36_data;
- wire rx36_src_rdy, rx36_dst_rdy;
- wire dummy;
+ // ////////////////////////////////////////////////////////////////////
+ // RX Side
+
+ wire [35:0] rx36_data, rx36b_data, rx36c_data;
+ wire rx36_src_rdy, rx36_dst_rdy, rx36b_src_rdy, rx36b_dst_rdy, rx36c_src_rdy, rx36c_dst_rdy;
+ wire [18:0] rx19_data;
+ wire rx19_src_rdy, rx19_dst_rdy;
+ wire [35:0] resp_data;
+ wire resp_src_rdy, resp_dst_rdy;
fifo_cascade #(.WIDTH(36), .SIZE(RXFIFOSIZE)) rx_fifo36
- (.clk(wb_clk), .reset(wb_rst), .clear(0),
+ (.clk(fifo_clk), .reset(fifo_rst), .clear(0),
.datain(rx_data_i), .src_rdy_i(rx_src_rdy_i), .dst_rdy_o(rx_dst_rdy_o),
- .dataout(rx36_data), .src_rdy_o(rx36_src_rdy), .dst_rdy_i(rx36_dst_rdy));
+ .dataout(rx36c_data), .src_rdy_o(rx36c_src_rdy), .dst_rdy_i(rx36c_dst_rdy));
- fifo36_to_fifo19 #(.LE(1)) f36_to_f19 // Little endian because ARM is LE
+ fifo36_mux #(.prio(1)) rx_mux
(.clk(fifo_clk), .reset(fifo_rst), .clear(0),
- .f36_datain(rx36_data), .f36_src_rdy_i(rx36_src_rdy), .f36_dst_rdy_o(rx36_dst_rdy),
- .f19_dataout({dummy,rx18_data}), .f19_src_rdy_o(rx18_src_rdy), .f19_dst_rdy_i(rx18_dst_rdy) );
-
- fifo_cascade #(.WIDTH(18), .SIZE(12)) rx_fifo
+ .data0_i(resp_data), .src0_rdy_i(resp_src_rdy), .dst0_rdy_o(resp_dst_rdy),
+ .data1_i(rx36c_data), .src1_rdy_i(rx36c_src_rdy), .dst1_rdy_o(rx36c_dst_rdy),
+ .data_o(rx36b_data), .src_rdy_o(rx36b_src_rdy), .dst_rdy_i(rx36b_dst_rdy));
+
+ fifo_short #(.WIDTH(36)) rx_sfifo
(.clk(fifo_clk), .reset(fifo_rst), .clear(0),
- .datain(rx18_data), .src_rdy_i(rx18_src_rdy), .dst_rdy_o(rx18_dst_rdy), .space(rx_fifo_space),
- .dataout(rx18b_data), .src_rdy_o(rx18b_src_rdy), .dst_rdy_i(rx18b_dst_rdy), .occupied());
-
- fifo_to_gpmc_async fifo_to_gpmc_async
+ .datain(rx36b_data), .src_rdy_i(rx36b_src_rdy), .dst_rdy_o(rx36b_dst_rdy),
+ .dataout(rx36_data), .src_rdy_o(rx36_src_rdy), .dst_rdy_i(rx36_dst_rdy));
+
+ fifo36_to_fifo19 #(.LE(1)) f36_to_f19 // FIXME Endianness?
(.clk(fifo_clk), .reset(fifo_rst), .clear(0),
- .data_i(rx18b_data), .src_rdy_i(rx18b_src_rdy), .dst_rdy_o(rx18b_dst_rdy),
- .EM_D(EM_D_fifo), .EM_NCS(EM_NCS4), .EM_NOE(EM_NOE),
- .frame_len(rx_frame_len) );
+ .f36_datain(rx36_data), .f36_src_rdy_i(rx36_src_rdy), .f36_dst_rdy_o(rx36_dst_rdy),
+ .f19_dataout(rx19_data), .f19_src_rdy_o(rx19_src_rdy), .f19_dst_rdy_i(rx19_dst_rdy) );
- fifo_watcher fifo_watcher
- (.clk(fifo_clk), .reset(fifo_rst), .clear(0),
- .src_rdy1(rx18_src_rdy), .dst_rdy1(rx18_dst_rdy), .sof1(rx18_data[16]), .eof1(rx18_data[17]),
- .src_rdy2(rx18b_src_rdy), .dst_rdy2(rx18b_dst_rdy), .sof2(rx18b_data[16]), .eof2(rx18b_data[17]),
- .have_packet(rx_have_data), .length(rx_frame_len), .bus_error(bus_error_rx) );
+ gpif_rd gpif_rd
+ (.gpif_clk(gpif_clk), .gpif_rst(gpif_rst),
+ .gpif_data(gpif_dat_out), .gpif_rd(RD), .have_pkt_rdy(have_pkt_rdy),
+ .sys_clk(fifo_clk), .sys_rst(fifo_rst),
+ .data_i(rx19_data), .src_rdy_i(rx19_src_rdy), .dst_rdy_o(rx19_dst_rdy));
+
+ // ////////////////////////////////////////////////////////////////////
+ // FIFO to Wishbone interface
- // ////////////////////////////////////////////
- // Control path on CS6
-
- gpmc_wb gpmc_wb
- (.EM_CLK(EM_CLK), .EM_D_in(EM_D), .EM_D_out(EM_D_wb), .EM_A(EM_A), .EM_NBE(EM_NBE),
- .EM_NCS(EM_NCS6), .EM_NWE(EM_NWE), .EM_NOE(EM_NOE),
- .wb_clk(wb_clk), .wb_rst(wb_rst),
- .wb_adr_o(wb_adr_o), .wb_dat_mosi(wb_dat_mosi), .wb_dat_miso(wb_dat_miso),
- .wb_sel_o(wb_sel_o), .wb_cyc_o(wb_cyc_o), .wb_stb_o(wb_stb_o), .wb_we_o(wb_we_o),
- .wb_ack_i(wb_ack_i) );
-
- assign debug = 0;
-endmodule // gpmc_async
-*/
+endmodule // gpif
diff --git a/usrp2/gpif/gpif_rd.v b/usrp2/gpif/gpif_rd.v
index f716d4a5d..a3167da16 100644
--- a/usrp2/gpif/gpif_rd.v
+++ b/usrp2/gpif/gpif_rd.v
@@ -1,5 +1,43 @@
module gpif_rd
- ();
+ (input gpif_clk, input gpif_rst,
+ output [15:0] gpif_data, input gpif_rd, output reg have_pkt_rdy,
+
+ input sys_clk, input sys_rst,
+ input [18:0] data_i, input src_rdy_i, output dst_rdy_o
+ );
+
+ wire [15:0] rxfifolevel;
+ wire [15:0] data_o;
+ wire rx_full;
+
+ // USB Read Side of FIFO
+ always @(negedge gpif_clk)
+ have_pkt_rdy <= (rxfifolevel >= 256); // FIXME make this more robust
+
+ // 257 Bug Fix
+ reg [8:0] read_count;
+ always @(negedge gpif_clk)
+ if(gpif_rst)
+ read_count <= 0;
+ else if(gpif_rd)
+ read_count <= read_count + 1;
+ else
+ read_count <= 0;
+
+ wire [17:0] data_int;
+ wire src_rdy_int, dst_rdy_int;
+
+ fifo_2clock_cascade #(.WIDTH(18), .SIZE(4)) rd_fifo_2clk
+ (.wclk(sys_clk), .datain(data_i), .src_rdy_i(src_rdy_i), .dst_rdy_o(dst_rdy_o), .space(),
+ .rclk(~gpif_clk), .dataout(data_int), .src_rdy_o(src_rdy_int), .dst_rdy_i(dst_rdy_int), .occupied(),
+ .arst(sys_rst));
+
+ fifo_cascade #(.WIDTH(19), .SIZE(9)) rd_fifo
+ (.clk(~gpif_clk), .reset(gpif_rst), .clear(0),
+ .datain(data_int), .src_rdy_i(src_rdy_int), .dst_rdy_o(dst_rdy_int), .space(),
+ .dataout(data_o), .src_rdy_o(), .dst_rdy_i(gpif_rd & ~read_count[8]), .occupied(rxfifolevel));
+
+ assign gpif_data = data_o[15:0];
endmodule // gpif_rd
diff --git a/usrp2/gpif/gpif_wr.v b/usrp2/gpif/gpif_wr.v
index c5cdc7597..6a73d1721 100644
--- a/usrp2/gpif/gpif_wr.v
+++ b/usrp2/gpif/gpif_wr.v
@@ -1,11 +1,11 @@
module gpif_wr
(input gpif_clk, input gpif_rst,
- input [15:0] gpif_data, input WR,
+ input [15:0] gpif_data, input gpif_wr,
output reg have_space,
input sys_clk, input sys_rst,
- output [19:0] data_o, output src_rdy_o, input dst_rdy_i,
+ output [18:0] data_o, output src_rdy_o, input dst_rdy_i,
output [31:0] debug );
reg wr_reg;
@@ -13,7 +13,7 @@ module gpif_wr
always @(posedge gpif_clk)
begin
- wr_reg <= WR;
+ wr_reg <= gpif_wr;
gpif_data_reg <= gpif_data;
end
@@ -28,20 +28,28 @@ module gpif_wr
write_count <= 0;
reg sop;
- wire occ = 0;
wire eop = (write_count == 255);
always @(posedge gpif_clk)
- sop <= WR & ~wr_reg;
+ sop <= gpif_wr & ~wr_reg;
wire [15:0] fifo_space;
always @(posedge gpif_clk)
have_space <= fifo_space > 256;
-
- fifo_2clock_cascade #(.WIDTH(19), .SIZE(9)) wr_fifo
- (.wclk(gpif_clk), .datain({occ,eop,sop,gpif_data_reg}),
- .src_rdy_i(wr_reg & ~write_count[8]), .dst_rdy_o(), .space(fifo_space),
- .rclk(sys_clk), .dataout(data_o), .src_rdy_o(src_rdy_o), .dst_rdy_i(dst_rdy_i), .occupied(),
+
+ wire [17:0] data_int;
+ wire src_rdy_int, dst_rdy_int;
+
+ fifo_cascade #(.WIDTH(18), .SIZE(9)) wr_fifo
+ (.clk(gpif_clk), .reset(gpif_rst), .clear(0),
+ .datain({eop,sop,gpif_data_reg}), .src_rdy_i(wr_reg & ~write_count[8]), .dst_rdy_o(), .space(fifo_space),
+ .dataout(data_int), .src_rdy_o(src_rdy_int), .dst_rdy_i(dst_rdy_int), .occupied());
+
+ fifo_2clock_cascade #(.WIDTH(18), .SIZE(4)) wr_fifo_2clk
+ (.wclk(gpif_clk), .datain(data_int), .src_rdy_i(src_rdy_int), .dst_rdy_o(dst_rdy_int), .space(),
+ .rclk(sys_clk), .dataout(data_o[17:0]), .src_rdy_o(src_rdy_o), .dst_rdy_i(dst_rdy_i), .occupied(),
.arst(sys_rst));
+
+ assign data_o[18] = 0;
endmodule // gpif_wr
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 19:15:07 +0000