Add packages needed for TSE MAC

4 files changed, 1083 insertions, 0 deletions

diff --git a/lib/ethernet/components/mdio_interface.vhd b/lib/ethernet/components/mdio_interface.vhd
new file mode 100644
index 0000000..483dcf1
--- /dev/null
+++ b/lib/ethernet/components/mdio_interface.vhd
@@ -0,0 +1,349 @@
+------------------------------------------------------------------
+--  _____       ______  _____                                    -
+-- |_   _|     |  ____|/ ____|  Institute of Embedded Systems    -
+--   | |  _ __ | |__  | (___    Zuercher Hochschule fuer         -
+--   | | | '_ \|  __|  \___ \   angewandte Wissenschaften        -
+--  _| |_| | | | |____ ____) |  (University of Applied Sciences) -
+-- |_____|_| |_|______|_____/   8401 Winterthur, Switzerland     -
+------------------------------------------------------------------
+--
+-- Project     : SInet
+-- Module      :
+-- Description : MDIO Interface and Link status check
+--
+-- $LastChangedDate: 2010-03-02 12:22:00 +0100 (Tue, 02 Mar 2010) $
+-- $Rev: 3094 $
+-- $Author: beut $
+-----------------------------------------------------------------
+--
+-- Change History
+-- Date     |Name      |Modification
+------------|----------|-----------------------------------------
+--  2.05.07 | GLC      | file created
+-----------------------------------------------------------------
+-- 02.11.07 | ffar     | adaptation for SInet
+-----------------------------------------------------------------
+-- 01.03.10 | ffar     | add state write Mode (RMII/MII selectabel)
+-----------------------------------------------------------------
+
+library ieee;
+  use ieee.numeric_std.all;
+  use ieee.std_logic_1164.all;
+library ines_ethernet;
+  use ines_ethernet.mii_management_transmit_pkg.all;
+library ines_misc;
+  use ines_misc.ines_vhdl_lib_base_pkg.all;
+  use ines_misc.reduce_pack.all;
+
+package mdio_interface_pkg is
+  component mdio_interface
+    generic(
+      C_SET_TO_MII   : boolean := false;
+      CLK_DIVIDER    : natural := 10;   -- divider for MDC
+      CHK_INTERVAL   : natural := 50e6; -- link check interval in clk_i cycles
+      NO_OF_PORTS    : natural := 1;    -- number of ports to poll => max 4
+      ADDR_PORT_1    : natural := 1;
+      ADDR_PORT_2    : natural := 2;
+      ADDR_PORT_3    : natural := 3;
+      ADDR_PORT_4    : natural := 4
+    );
+    port(
+      clk_i          : in  std_logic;
+      reset_n_i      : in  std_logic;
+      -- manual access
+      phy_addr_i     : in  std_logic_vector(4 downto 0);
+      phy_reg_i      : in  std_logic_vector(4 downto 0);
+      phy_data_i     : in  std_logic_vector(15 downto 0);
+      phy_data_o     : out std_logic_vector(15 downto 0);
+      send_i         : in  std_logic;
+      read_i         : in  std_logic;
+      busy_n_o       : out std_logic;
+      -- Status out
+      link_o         : out std_logic_vector(3 downto 0);  -- 1= link OK
+      reset_phy_i    : in  std_logic_vector(3 downto 0);  -- 1= reset phy
+      -- MDIO
+      mdio_i         : in  std_logic;
+      mdio_o         : out std_logic;
+      mdio_oe_o      : out std_logic;
+      mdc_o          : out std_logic
+    );
+  end component;
+end package mdio_interface_pkg;
+
+
+
+
+library ieee;
+  use ieee.numeric_std.all;
+  use ieee.std_logic_1164.all;
+library ines_ethernet;
+  use ines_ethernet.mii_management_transmit_pkg.all;
+library ines_misc;
+  use ines_misc.ines_vhdl_lib_base_pkg.all;
+  use ines_misc.reduce_pack.all;
+
+
+entity mdio_interface is
+  generic(
+    C_SET_TO_MII   : boolean := false;-- set to mii mode (otherwise mii mode, otherwise rmii is enabled)
+    CLK_DIVIDER    : natural := 10;   -- divider for MDC
+    CHK_INTERVAL   : natural := 50e6; -- link check interval in clk_i cycles
+    NO_OF_PORTS    : natural := 1;    -- number of ports to poll => max 4
+    ADDR_PORT_1    : natural := 1;
+    ADDR_PORT_2    : natural := 2;
+    ADDR_PORT_3    : natural := 3;
+    ADDR_PORT_4    : natural := 4
+  );
+  port(
+    clk_i          : in  std_logic;
+    reset_n_i      : in  std_logic;
+    -- manual access
+    phy_addr_i     : in  std_logic_vector(4 downto 0);
+    phy_reg_i      : in  std_logic_vector(4 downto 0);
+    phy_data_i     : in  std_logic_vector(15 downto 0);
+    phy_data_o     : out std_logic_vector(15 downto 0);
+    send_i         : in  std_logic;
+    read_i         : in  std_logic;
+    busy_n_o       : out std_logic;
+    -- Status out
+    link_o         : out std_logic_vector(3 downto 0);  -- 1= link OK
+    reset_phy_i    : in  std_logic_vector(3 downto 0);  -- 1= reset phy
+    -- MDIO
+    mdio_i         : in  std_logic;
+    mdio_o         : out std_logic;
+    mdio_oe_o      : out std_logic;
+    mdc_o          : out std_logic
+  );
+end mdio_interface;
+
+
+
+architecture rtl of mdio_interface is
+
+  type   states        is (S_IDLE, S_WAIT, S_RESET, S_RESTART, S_GETLINK, S_WAIT_GETLINK, 
+                           S_RMII_READ, S_RMII_READ_WAIT, S_RMII_WRITE, S_RMII_WRITE_WAIT, S_READ, S_WRITE);
+  signal current_state : states;
+
+  signal interval_cnt  : integer range 0 to CHK_INTERVAL;
+  signal chk_link      : std_logic;
+  signal write_mode    : std_logic;
+
+  signal curr_phy_no   : integer range 1 to NO_OF_PORTS;
+
+  signal phy_addr      : std_logic_vector(4 downto 0);
+  signal phy_reg       : std_logic_vector(4 downto 0);
+  signal phy_dat_i     : std_logic_vector(15 downto 0);
+  signal phy_dat_o     : std_logic_vector(15 downto 0);
+  signal rmii_reg_dat  : std_logic_vector(15 downto 0);
+  signal phy_write     : std_logic;
+  signal phy_read      : std_logic;
+  signal phy_done      : std_logic;
+  signal done_f        : std_logic;
+
+  constant CONTROL_REG : std_logic_vector(4 downto 0) := "00000"; -- 0x00
+  constant STATUS_REG  : std_logic_vector(4 downto 0) := "10000"; -- 0x10
+  constant RMII_REG    : std_logic_vector(4 downto 0) := "10111"; -- 0x17
+
+  constant C_RMII_MII_BITMASK    : std_logic_vector(15 downto 0) := "0000000000010000"; -- 0x10
+
+  constant MII_ADDR    : std_logic_array_5(1 to 4) := (std_logic_vector(to_unsigned(ADDR_PORT_1,5)),
+                                                       std_logic_vector(to_unsigned(ADDR_PORT_2,5)),
+                                                       std_logic_vector(to_unsigned(ADDR_PORT_3,5)),
+                                                       std_logic_vector(to_unsigned(ADDR_PORT_4,5)));
+
+begin
+
+  phy_data_o <= phy_dat_o;
+  busy_n_o   <= phy_done;
+
+  sm_proc : process (clk_i, reset_n_i, current_state, chk_link, reset_phy_i, send_i, read_i, phy_done, curr_phy_no)
+  begin
+    if reset_n_i = '0' then
+      phy_addr   <= (others => '0');
+      phy_reg    <= (others => '0');
+      phy_dat_o  <= (others => '0');
+      phy_write  <= '0';
+      phy_read   <= '0';
+      current_state <= S_IDLE;
+      link_o        <= (others => '0');
+      curr_phy_no    <= 1;
+      done_f        <= '0';
+    elsif clk_i'event and clk_i = '1' then
+
+      phy_write  <= '0';
+      phy_read   <= '0';
+
+      case current_state is
+
+        when S_IDLE =>
+          if chk_link = '1' then
+            current_state <= S_GETLINK;
+          elsif write_mode = '1' then
+            current_state <= S_RMII_READ;
+          elsif or_reduce(reset_phy_i) = '1' then -- /= "0000" then
+            current_state <= S_RESET;
+          elsif send_i = '1' then
+            current_state <= S_WRITE;
+          elsif read_i = '1' then
+            current_state <= S_READ;
+          end if;
+
+
+        when S_GETLINK =>
+          phy_addr        <= MII_ADDR(curr_phy_no);
+          phy_reg         <= STATUS_REG;
+          phy_read        <= '1';
+
+          current_state   <= S_WAIT_GETLINK;
+
+
+        when S_WAIT_GETLINK =>
+          if phy_done = '1' and done_f = '0' and curr_phy_no < NO_OF_PORTS then
+            link_o(curr_phy_no-1)   <= phy_dat_i(0);
+            curr_phy_no             <= curr_phy_no + 1;
+            current_state           <= S_GETLINK;
+          elsif phy_done = '1'  and done_f = '0' then
+            link_o(curr_phy_no-1)   <= phy_dat_i(0);
+            curr_phy_no             <= 1;
+            current_state           <= S_IDLE;
+          end if;
+
+
+        when S_RMII_READ =>
+          phy_addr   <= MII_ADDR(curr_phy_no);
+          phy_reg    <= RMII_REG;
+          phy_read   <= '1';
+
+          current_state <= S_RMII_READ_WAIT;
+
+
+        when S_RMII_READ_WAIT =>
+          if phy_done = '1' and done_f = '0' then
+            rmii_reg_dat    <= phy_dat_i;
+            current_state   <= S_RMII_WRITE;
+          end if;
+
+
+        when S_RMII_WRITE =>
+          phy_addr   <= MII_ADDR(curr_phy_no);
+          phy_reg    <= RMII_REG;
+          if C_SET_TO_MII = true then
+            -- Clear Bit Nr 5 and set PHY in MII MODE
+            phy_dat_o    <= rmii_reg_dat and (not C_RMII_MII_BITMASK);
+          else
+            -- Set Bit Nr 5 and set PHY in RMII MODE
+            phy_dat_o    <= rmii_reg_dat or C_RMII_MII_BITMASK;
+          end if;
+          phy_write  <= '1';
+
+          current_state <= S_RMII_WRITE_WAIT;
+
+
+        when S_RMII_WRITE_WAIT =>
+          if phy_done = '1' and done_f = '0' and curr_phy_no < NO_OF_PORTS then
+            curr_phy_no    <= curr_phy_no + 1;
+            -- Start Read and Write for other PHY's
+            current_state <= S_RMII_READ;
+          elsif phy_done = '1'  and done_f = '0' then
+            curr_phy_no    <= 1;
+            current_state <= S_IDLE;
+          end if;
+
+
+        when S_READ =>
+          phy_addr   <= phy_addr_i;
+          phy_reg    <= phy_reg_i;
+          phy_read   <= '1';
+
+          current_state <= S_WAIT;
+
+
+        when S_WRITE =>
+          phy_addr   <= phy_addr_i;
+          phy_reg    <= phy_reg_i;
+          phy_dat_o  <= phy_data_i;
+          phy_write  <= '1';
+
+          current_state <= S_WAIT;
+
+
+        when S_RESET =>
+          if    reset_phy_i(0) = '1' then
+            phy_addr   <= MII_ADDR(1);
+          elsif reset_phy_i(1) = '1' then
+            phy_addr   <= MII_ADDR(2);
+          elsif reset_phy_i(2) = '1' then
+            phy_addr   <= MII_ADDR(3);
+          elsif reset_phy_i(3) = '1' then
+            phy_addr   <= MII_ADDR(4);
+          end if;
+          phy_reg    <= CONTROL_REG;
+          phy_dat_o  <= X"8000";
+          phy_write  <= '1';
+
+          current_state <= S_WAIT;
+
+
+        when S_RESTART =>
+          current_state <= S_IDLE;
+
+
+        when S_WAIT =>
+          if phy_done = '1' and done_f = '0' then
+            current_state <= S_IDLE;
+          end if;
+
+      end case;
+      done_f <= phy_done;
+    end if;
+  end process;
+
+  interval_proc : process (clk_i, reset_n_i)
+  begin
+    if reset_n_i = '0' then
+      interval_cnt <=  0;
+      chk_link     <= '0';
+      write_mode   <= '0';
+    elsif clk_i'event and clk_i = '1' then
+      chk_link     <= '0';
+      write_mode   <= '0';
+
+      if interval_cnt < CHK_INTERVAL then
+        interval_cnt <=  interval_cnt + 1;
+      else
+        interval_cnt <=  0;
+        chk_link     <= '1';
+      end if;
+
+      if interval_cnt = CHK_INTERVAL - 10000 then
+        write_mode   <= '1';
+      end if;
+
+    end if;
+  end process;
+
+
+  mdio_transceiver : mii_management_transmit
+  generic map(
+    G_CLK_DIVIDER  => CLK_DIVIDER
+  )
+  port map(
+    clk            => clk_i,
+    reset_n        => reset_n_i,
+
+    phy_addr_i     => phy_addr,
+    phy_reg_i      => phy_reg,
+    phy_data_i     => phy_dat_o,
+    phy_data_o     => phy_dat_i,
+    send_i         => phy_write,
+    read_i         => phy_read,
+    done_o         => phy_done,
+
+    mdc_pad_o      => mdc_o,
+    md_pad_i       => mdio_i,
+    md_pad_o       => mdio_o,
+    md_padoe_o     => mdio_oe_o
+  );
+
+end rtl;
+
diff --git a/lib/ethernet/components/mii_management_transmit.vhd b/lib/ethernet/components/mii_management_transmit.vhd
new file mode 100644
index 0000000..4a81d8f
--- /dev/null
+++ b/lib/ethernet/components/mii_management_transmit.vhd
@@ -0,0 +1,178 @@
+------------------------------------------------------------------
+--  _____       ______  _____                                    -
+-- |_   _|     |  ____|/ ____|  Institute of Embedded Systems    -
+--   | |  _ __ | |__  | (___    Zuercher Hochschule fuer         -
+--   | | | '_ \|  __|  \___ \   angewandte Wissenschaften        -
+--  _| |_| | | | |____ ____) |  (University of Applied Sciences) -
+-- |_____|_| |_|______|_____/   8401 Winterthur, Switzerland     -
+------------------------------------------------------------------
+--
+-- Project     : SInet
+-- Module      :
+-- Description : MDIO low level protocol
+--
+-- $LastChangedDate: 2008-10-31 12:06:00 +0100 (Fri, 31 Oct 2008) $
+-- $Rev: 1905 $
+-- $Author: ffar $
+-----------------------------------------------------------------
+--
+-- Change History
+-- Date     |Name      |Modification
+-----------------------------------------------------------------
+-- 02.11.07 | ffar     | file created based on library component
+--          |          | from glc (27.09.05)
+-----------------------------------------------------------------
+
+
+library ieee;
+  use ieee.numeric_std.all;
+  use ieee.std_logic_1164.all;
+
+package mii_management_transmit_pkg is
+  component mii_management_transmit
+    generic(
+      G_CLK_DIVIDER  : in  integer
+    );
+    port(
+      clk            : in  std_logic;
+      reset_n        : in  std_logic;
+
+      phy_addr_i     : in  std_logic_vector(4 downto 0);
+      phy_reg_i      : in  std_logic_vector(4 downto 0);
+      phy_data_i     : in  std_logic_vector(15 downto 0);
+      phy_data_o     : out std_logic_vector(15 downto 0);
+      send_i         : in  std_logic;
+      read_i         : in  std_logic;
+      done_o         : out std_logic;
+
+      mdc_pad_o      : out std_logic;
+      md_pad_i       : in  std_logic;
+      md_pad_o       : out std_logic;
+      md_padoe_o     : out std_logic
+    );
+  end component mii_management_transmit;
+end package mii_management_transmit_pkg;
+
+
+
+library ieee;
+  use ieee.numeric_std.all;
+  use ieee.std_logic_1164.all;
+
+entity mii_management_transmit is
+  generic(
+    G_CLK_DIVIDER  : in  integer
+  );
+  port(
+    clk            : in  std_logic;
+    reset_n        : in  std_logic;
+
+    phy_addr_i     : in  std_logic_vector(4 downto 0);
+    phy_reg_i      : in  std_logic_vector(4 downto 0);
+    phy_data_i     : in  std_logic_vector(15 downto 0);
+    phy_data_o     : out std_logic_vector(15 downto 0);
+    send_i         : in  std_logic;
+    read_i         : in  std_logic;
+    done_o         : out std_logic;
+
+    mdc_pad_o      : out std_logic;
+    md_pad_i       : in  std_logic;
+    md_pad_o       : out std_logic;
+    md_padoe_o     : out std_logic
+  );
+end mii_management_transmit;
+
+architecture rtl of mii_management_transmit is
+
+
+  signal   confdata : std_logic_vector(32 downto 0) := (others => '0');
+  signal   rec_data : std_logic_vector(15 downto 0);
+  signal   conf_v   : integer range 0 to 64;
+  signal   cnt_v    : integer range 0 to G_CLK_DIVIDER;
+  signal   mdc      : std_logic;
+  signal   send     : std_logic;
+
+begin
+
+  phy_data_o <= rec_data;
+
+  phy_config : process(clk, reset_n, mdc, send_i, read_i, phy_addr_i, phy_reg_i, phy_data_i, md_pad_i, conf_v)
+  begin
+    if reset_n = '0' then
+      conf_v     <=  0;
+      md_pad_o   <= '0';
+      md_padoe_o <= '0';
+      done_o     <= '1';
+      confdata   <= (others => '0');
+      rec_data   <= (others => '0');
+      send       <= '0';
+    elsif clk'event and clk = '1' then
+      if conf_v > 32 then                    -- send preamble
+        done_o       <= '0';
+        md_pad_o     <= '1';
+        if mdc = '1' then
+          conf_v    <= conf_v - 1;
+        end if;
+      elsif conf_v > 0 and send = '1' then   -- send data
+        if mdc = '1' then
+          md_pad_o   <= confdata(conf_v);
+          conf_v    <= conf_v - 1;
+        end if;
+      elsif conf_v > 16 and send = '0' then  -- receive data
+        if mdc = '1' then
+          md_pad_o   <= confdata(conf_v);
+          conf_v     <= conf_v - 1;
+        end if;
+      elsif conf_v > 0 and send = '0' then   -- store data
+        if mdc = '1' then
+          rec_data(15 downto 1) <= rec_data(14 downto 0);
+          rec_data(0) <= md_pad_i;
+          conf_v      <= conf_v - 1;
+        end if;
+      elsif send_i = '1' then
+        confdata     <= "0101" & phy_addr_i & phy_reg_i & "10" & phy_data_i & "0";
+        conf_v       <= 64;
+        send         <= '1';
+        done_o       <= '0';
+      elsif read_i = '1' then
+        confdata     <= "0110" & phy_addr_i & phy_reg_i & X"0000" & "000";
+        conf_v       <= 64;
+        send         <= '0';
+        done_o       <= '0';
+      else
+        send         <= '0';
+        md_pad_o     <= '0';
+        done_o       <= '1';
+      end if;
+
+      if send = '1' OR conf_v >= 18 then
+        md_padoe_o   <= '1';
+      else
+        md_padoe_o   <= '0';
+      end if;
+
+    end if;
+  end process;
+
+  clk_div : process(clk, reset_n, cnt_v)
+  begin
+    if reset_n = '0' then
+      cnt_v      <=  0;
+      mdc_pad_o  <= '0';
+      mdc        <= '0';
+    elsif clk'event and clk = '1' then
+      mdc        <= '0';
+      if cnt_v = G_CLK_DIVIDER/2+1 then
+        mdc_pad_o  <= '0';
+        mdc        <= '1';
+        cnt_v      <= cnt_v - 1;
+      elsif cnt_v <= 1 then
+        mdc_pad_o  <= '1';
+        cnt_v      <= G_CLK_DIVIDER;
+      else
+        cnt_v      <= cnt_v - 1;
+      end if;
+    end if;
+  end process;
+
+end rtl;
\ No newline at end of file
diff --git a/lib/ethernet/components/rmii_in_out.vhd b/lib/ethernet/components/rmii_in_out.vhd
new file mode 100644
index 0000000..13db067
--- /dev/null
+++ b/lib/ethernet/components/rmii_in_out.vhd
@@ -0,0 +1,339 @@
+------------------------------------------------------------------

+--  _____       ______  _____                                    -

+-- |_   _|     |  ____|/ ____|  Institute of Embedded Systems    -

+--   | |  _ __ | |__  | (___    Zuercher Hochschule fuer         -

+--   | | | '_ \|  __|  \___ \   angewandte Wissenschaften        -

+--  _| |_| | | | |____ ____) |  (University of Applied Sciences) -

+-- |_____|_| |_|______|_____/   8401 Winterthur, Switzerland     -

+------------------------------------------------------------------

+--

+-- Project     : SInet

+-- Module      : synthesis library ines_ethernet

+--! \file

+--! \brief RMII to byte stream converter

+--

+-- $LastChangedDate: 2010-04-14 15:27:24 +0200 (Wed, 14 Apr 2010) $

+-- $Rev: 3244 $

+-- $Author: beut $

+-----------------------------------------------------------------

+--

+-- Change History

+-- Date     |Name      |Modification

+-----------------------------------------------------------------

+-- 13.02.07 | GLC      | file created

+-----------------------------------------------------------------

+-- 02.11.07 | ffar     | adaptation for SInet

+-----------------------------------------------------------------

+-- 20.06.08 | beut     | preambel and SFD Generator added

+-----------------------------------------------------------------

+-- 14.04.10 | beut     | Interframe gap counter added

+-----------------------------------------------------------------

+

+library ieee;

+  use ieee.std_logic_1164.all;

+

+--! \brief This packages provides an interface to an RMII 100BaseTX phy

+package rmii_in_out_pkg is

+  component rmii_in_out

+    generic(

+      G_AMOUNT_OF_PREAMBEL_AND_SFD_BYTES    : natural := 4;

+      G_IFG_CLOCKS                          : natural := 48 -- 96 Bit ==> 960ns @ 100Mbit ==>  IFG = 48 @ 20ns Clockperiode

+    );

+    port (

+      clk_i           : in  std_logic; -- 50 Mhz

+      reset_n_i       : in  std_logic;

+      -- RMII in

+      rxd_i           : in  std_logic_vector(1 downto 0);

+      rx_dv_i         : in  std_logic;

+      crs_dv_i        : in  std_logic;

+      col_i           : in  std_logic;

+      -- RMII out

+      txd_o           : out std_logic_vector(1 downto 0);

+      tx_en_o         : out std_logic;

+      -- Data out

+      rx_data_o       : out std_logic_vector(7 downto 0);

+      rx_stb_o        : out std_logic;

+      rx_dv_o         : out std_logic;

+      -- Data in

+      tx_data_i       : in  std_logic_vector(7 downto 0);

+      tx_en_i         : in  std_logic;

+      tx_ack_o        : out std_logic;

+      -- Other

+      get_time_o      : out std_logic;

+      frame_start_o   : out std_logic;

+      frame_end_o     : out std_logic

+    );

+  end component rmii_in_out;

+end package rmii_in_out_pkg;

+

+

+library ieee;

+  use ieee.std_logic_1164.all;

+  use ieee.numeric_std.all;

+

+

+--! \brief Interface to RMII 100BaseTX phy

+--! \details This interface is a bidirectional converter between byte stream

+--!          interface and RMII. It also provides start of frame and end of

+--!          frame signals.

+--!          Because of generic byte stream interface it can be easily

+--!          replaced by coresponding MII interface.

+entity rmii_in_out is

+  generic(

+    G_AMOUNT_OF_PREAMBEL_AND_SFD_BYTES    : natural := 4;    --! number of preamble bytes which are sent

+    G_IFG_CLOCKS                          : natural := 48    -- 96 Bit ==> 960ns @ 100Mbit ==>  IFG = 48 @ 20ns Clockperiode

+  );

+  port (

+    --!@name Clock and reset inputs

+    --@{

+    clk_i           : in  std_logic;                    --! This clock must run at 50 Mhz

+    reset_n_i       : in  std_logic;                    --! negative, asynchronous reset

+    --!@}

+

+    --!@name RMII input (from Network)

+    --@{

+    rxd_i           : in  std_logic_vector(1 downto 0);  --! Data input

+    rx_dv_i         : in  std_logic;                     --! Receive data valid

+    crs_dv_i        : in  std_logic;                     --! carrier sense (not used)

+    col_i           : in  std_logic;                     --! collision detected (not used)

+    --!@}

+

+    --!@name RMII out (to Network)

+    --@{

+    txd_o           : out std_logic_vector(1 downto 0);  --! Transmit data out

+    tx_en_o         : out std_logic;                     --! Transmit data enable

+    --!@}

+

+    --!@name Data out to FPGA

+    --@{

+    rx_data_o       : out std_logic_vector(7 downto 0);  --! Receive data

+    rx_stb_o        : out std_logic;                     --! Receive data strobe

+    rx_dv_o         : out std_logic;                     --! Receive data valid

+    --!@}

+

+    --!@name Data in from FPGA

+    --@{

+    tx_data_i       : in  std_logic_vector(7 downto 0);  --! Transmit data out

+    tx_en_i         : in  std_logic;                     --! Transmit data enable

+    tx_ack_o        : out std_logic;                     --! Transmit data acknowledge

+    --!@}

+

+    --!@name Additional information signals

+    --@{

+    get_time_o      : out std_logic;                     --! Frame start in preamble detected --> take 1588 time stamp

+    frame_start_o   : out std_logic;                     --! Pulse at frame start, after preamble

+    frame_end_o     : out std_logic                      --! Pulse at frame end

+    --!@}

+  );

+end rmii_in_out;

+

+--! \brief The pincount optimised RMII interface is converted to 8 Bit byte stream interface

+--! \details Data are received at 50MHz from phy. There is no separate clock signal between

+--!          phy and FPGA. Instead of using a separate clock signal, both chips are connected to

+--!          the same clock source. The output data stream which is delivered to the FPGA internal

+--!          components is 8 Bit wide, with clock signal. The send path does the oposite.

+architecture rtl of rmii_in_out is

+

+  --! \name Receive signals

+  --!@{

+  --! receive fsm states enumeration

+  type states          is (Wait_For_Start_Of_Frame, Wait_For_End_Of_Frame,

+                           Preamble, Sfd, Frame, Toggle_Or_End_Of_Frame);

+  --! receive fsm states

+  signal state             : states;

+  --! Used for edge detection at end of frame

+  signal rx_dv_i_f         : std_logic;

+  --! shows active frame stream (same as rx_dv_o)

+  signal frame_in          : std_logic;

+  --! frame_in edge pulse

+  signal frame_in_f        : std_logic;

+  --! parallelise the 2 bit input stream to 8 bit

+  signal data_buffer       : std_logic_vector(7 downto 0);

+  --! pointer to data_buffer

+  signal data_i_position   : integer range 0 to 3;

+  --!@}

+

+  --! \name Transmit signals

+  --!@{

+  --! pointer to tx_data

+  signal nibble_cnt   : integer range 0 to 3  := 3;

+  --! transmit data

+  signal tx_data      : std_logic_vector(7 downto 0);

+  --! transmit enable

+  signal tx_en        : std_logic;

+  --! transmit enable one clock delayed

+  signal tx_en_f      : std_logic;

+  --! preamble byte counter

+  signal preamble_cnt  : integer range 0 to 7;

+  --!@}

+

+  --! \name IFG signals

+  --!@{

+  --! counts the IFG

+  signal ifg_cnt                        : natural range 0 to G_IFG_CLOCKS;

+  --!@}

+

+begin

+

+  rx_dv_o        <= frame_in;

+

+  frame_start_o  <= frame_in and (not frame_in_f);

+  frame_end_o    <= (not frame_in) and frame_in_f;

+  tx_en_o        <= tx_en;

+

+  --! receive frames and cut off pramble

+  rmii_in_out_proc : process (reset_n_i, clk_i)

+  begin

+    if (reset_n_i = '0') then

+      get_time_o    <= '0';

+      rx_dv_i_f     <= '0';

+      frame_in      <= '0';

+      state         <= Wait_For_Start_Of_Frame;

+    elsif (clk_i'event and clk_i = '1') then

+

+      rx_dv_i_f <= rx_dv_i;

+

+      case state is

+        when Wait_For_Start_Of_Frame =>

+          get_time_o  <= '0';

+          if rx_dv_i = '1'  then

+            state <= Preamble;

+          else

+            state <= Wait_For_Start_Of_Frame;

+          end if;

+

+        when Preamble =>

+          if rx_dv_i /= '1' then

+            state <= Wait_For_End_Of_Frame;

+          elsif rxd_i = "01" then -- preamble detected

+            state <= Sfd;

+          else

+            state <= Preamble;

+          end if;

+

+        when Sfd =>

+          if rx_dv_i /= '1' then

+            state <= Wait_For_End_Of_Frame;

+          elsif rxd_i = "11" then -- SFD detected

+            get_time_o   <= '1';

+            state        <= Frame;

+          else

+            state        <= Sfd;

+          end if;

+

+        when Frame =>

+          frame_in    <= '1';

+          if rx_dv_i /= '1' then

+            state     <= Wait_For_End_Of_Frame;

+          else

+            state     <= Frame;

+          end if;

+

+        when Wait_For_End_Of_Frame =>

+          if (rx_dv_i /= '1' and rx_dv_i_f /= '1') then

+            get_time_o   <= '0';

+            frame_in     <= '0';

+            state        <= Wait_For_Start_Of_Frame;

+          else

+            state        <= Wait_For_End_Of_Frame;

+          end if;

+

+        when others =>

+          state <= Wait_For_End_Of_Frame;

+

+      end case;

+    end if;

+  end process;

+

+  --! converts 2 bit RMII data to bytes

+  conv_2_to_8bit_proc : process (reset_n_i, clk_i)

+  begin

+

+    if (reset_n_i = '0') then

+      rx_stb_o         <= '0';

+      rx_data_o        <= (others => '0');

+      data_buffer      <= (others => '0');

+      data_i_position  <=  0;

+      frame_in_f       <= '0';

+    elsif (clk_i'event and clk_i = '1') then

+

+      rx_stb_o   <= '0';

+      frame_in_f  <= frame_in;

+

+      data_buffer(5 downto 0) <= data_buffer(7 downto 2);

+      data_buffer(7 downto 6) <= rxd_i;

+

+      if rx_dv_i = '1' and rx_dv_i_f = '0' then -- reset at start of frame

+        data_i_position <= 0;

+        rx_data_o       <= (others => '0');

+      elsif frame_in = '1' then  -- store data

+

+        if data_i_position < 3 then

+          data_i_position <= data_i_position + 1;

+        else

+          data_i_position <= 0;

+          rx_data_o       <= data_buffer;

+          rx_stb_o        <= '1';     -- indicates a valid byte

+        end if;

+

+      end if;

+    end if;

+  end process;

+

+  txd_o   <= tx_data(1 downto 0);

+

+  --! send frames and generate preamble

+  rmii_out_proc : process (reset_n_i, clk_i)

+  begin

+    if (reset_n_i = '0') then

+      tx_data      <= (others => '0');

+      tx_en        <= '0';

+      tx_ack_o     <= '0';

+      nibble_cnt   <= 3;

+      preamble_cnt <= 0;

+    elsif (clk_i'event and clk_i = '1') then

+      tx_ack_o     <= '0';

+      if (tx_en_i = '1' or nibble_cnt < 3) and ifg_cnt = 0 then          -- framestart or send last nibble

+        tx_en         <= '1';                                            -- start

+        if nibble_cnt < 3 then                                           -- continute byte

+          tx_data(5 downto 0) <= tx_data(7 downto 2);

+          tx_data(7 downto 6) <= "00";

+          nibble_cnt   <= nibble_cnt + 1;

+        elsif preamble_cnt + 1 < G_AMOUNT_OF_PREAMBEL_AND_SFD_BYTES then -- send preamble

+          tx_data      <= b"0101_0101";

+          preamble_cnt <= preamble_cnt + 1;

+          nibble_cnt   <= 0;

+        elsif preamble_cnt + 1 = G_AMOUNT_OF_PREAMBEL_AND_SFD_BYTES then -- send sfd

+          tx_data      <= b"1101_0101";

+          preamble_cnt <= preamble_cnt + 1;

+          nibble_cnt   <= 0;

+        else                                                             -- send data

+          tx_data      <= tx_data_i;

+          tx_ack_o     <= '1';

+          nibble_cnt   <= 0;

+        end if;

+      else                                                               -- stop

+        tx_en          <= '0';

+        preamble_cnt   <= 0;

+        nibble_cnt     <= 3;

+      end if;

+    end if;

+  end process;

+

+  --! Interframe Gap Counter

+  ifg_counter : process(clk_i, reset_n_i)

+  begin

+    if reset_n_i = '0' then

+      ifg_cnt <= 0;

+      tx_en_f <= '0';

+    elsif clk_i'event and clk_i = '1' then

+      tx_en_f <= tx_en;                      -- tx_en one clock delayed

+      if tx_en = '0' and tx_en_f = '1' then  -- end of frame

+        ifg_cnt <= G_IFG_CLOCKS;

+      elsif ifg_cnt > 0 then

+        ifg_cnt <= ifg_cnt -1;

+      end if;

+    end if;

+  end process ifg_counter;

+

+end rtl;
\ No newline at end of file
diff --git a/lib/ethernet/components/rmii_phy_to_mii_mac.vhd b/lib/ethernet/components/rmii_phy_to_mii_mac.vhd
new file mode 100644
index 0000000..09227c6
--- /dev/null
+++ b/lib/ethernet/components/rmii_phy_to_mii_mac.vhd
@@ -0,0 +1,217 @@
+------------------------------------------------------------------

+--  _____       ______  _____                                    -

+-- |_   _|     |  ____|/ ____|                                   -

+--   | |  _ __ | |__  | (___    Institute of Embedded Systems    -

+--   | | | '_ \|  __|  \___ \   Zuercher Hochschule Winterthur   -

+--  _| |_| | | | |____ ____) |  (University of Applied Sciences) -

+-- |_____|_| |_|______|_____/   8401 Winterthur, Switzerland     -

+------------------------------------------------------------------

+--

+-- Project     : SInet

+-- Description : Connects the data interface of a PHY in RMMI Mode and a MAC

+--               in MII Mode

+-- $LastChangedDate: 2006-11-14 12:14:54 +0100 (Tue, 14 Nov 2006) $

+-- $Rev: 1358 $

+-- $Author: beut $

+-----------------------------------------------------------------

+--

+-- Change History

+-- Date     |Name      |Modification

+------------|----------|-----------------------------------------

+-- 20.02.09 | beut      | file ceated

+-----------------------------------------------------------------

+library ieee;

+  use ieee.std_logic_1164.all;

+  use ieee.numeric_std.all;

+

+package rmii_phy_to_mii_mac_pkg is

+  component rmii_phy_to_mii_mac

+  port (

+      reset_n_i         : in std_logic;

+      clk_25_i          : in std_logic;

+      clk_50_i          : in std_logic;

+      rmii_crs_i        : in std_logic;

+

+      -- Transmit Path

+      mii_tx_en_i       : in std_logic;

+      mii_txd_i         : in std_logic_vector(3 downto 0);

+      rmii_tx_en_o      : out std_logic;

+      rmii_txd_o        : out std_logic_vector(1 downto 0);

+

+      -- Receive Path

+      rmii_rx_dv_i      : in std_logic;

+      rmii_rxd_i        : in std_logic_vector(1 downto 0);

+      mii_rx_dv_o       : out std_logic;

+      mii_rxd_o         : out std_logic_vector(3 downto 0)

+  );

+  end component rmii_phy_to_mii_mac;

+end package rmii_phy_to_mii_mac_pkg;

+

+library ieee;

+  use ieee.std_logic_1164.all;

+  use ieee.numeric_std.all;

+

+entity rmii_phy_to_mii_mac is

+  port (

+      reset_n_i         : in std_logic;

+      clk_25_i          : in std_logic;

+      clk_50_i          : in std_logic;

+      rmii_crs_i        : in std_logic;

+

+      -- Transmit Path

+      mii_tx_en_i       : in std_logic;

+      mii_txd_i         : in std_logic_vector(3 downto 0);

+      rmii_tx_en_o      : out std_logic;

+      rmii_txd_o        : out std_logic_vector(1 downto 0);

+

+      -- Receive Path

+      rmii_rx_dv_i      : in std_logic;

+      rmii_rxd_i        : in std_logic_vector(1 downto 0);

+      mii_rx_dv_o       : out std_logic;

+      mii_rxd_o         : out std_logic_vector(3 downto 0)

+  );

+end rmii_phy_to_mii_mac;

+

+

+architecture behavior of rmii_phy_to_mii_mac is

+

+  signal rmii_txd_next, rmii_txd_curr            : std_logic;

+  signal clk_25_sync_to_data                     : std_logic;

+  signal clk_25_toggle, clk_50_toggle            : std_logic;

+  signal rmii_rxd_buffer                         : std_logic_vector(5 downto 0);

+  signal mii_txd_buffer                          : std_logic_vector(3 downto 0);

+  signal buffer_cnt                              : integer range 0 to 1;

+  signal clk_50_en                               : std_logic;

+  signal rmii_rx_dv_f                            : std_logic;

+  signal mii_rx_dv_f                             : std_logic;

+  signal mii_rx_dv_ff                            : std_logic;

+  signal rmii_valid_sof                          : std_logic;

+

+begin

+

+  -----------------------------------------------------------------

+  -- Clock 50 Enable Gnerating (is high if clock 25Mhz and Clock 50 MHz are rising

+  -----------------------------------------------------------------

+    

+  clock_25_proc: process (clk_25_i) 

+  begin

+    if rising_edge(clk_25_i) then

+      clk_25_toggle <= not clk_25_toggle;

+    end if;

+  end process;

+

+  -- The clock enable muxes data in 25MHz freqency and has the same timing like data and not the clock!

+  clock_50_proc: process (reset_n_i, clk_50_i) 

+  begin

+    if reset_n_i = '0' then

+      clk_50_toggle          <= '0';

+      clk_50_en              <= '0';

+    elsif rising_edge(clk_50_i) then

+      clk_50_toggle <= clk_25_toggle;

+      -- edge detection

+      clk_50_en <= clk_25_toggle xor clk_50_toggle; --25 MHz clk sync to data of 50MHz

+    end if;

+  end process;

+  -----------------------------------------------------------------

+  

+

+  -----------------------------------------------------------------

+  -- Data Muxing from MAC to PHY

+  -----------------------------------------------------------------

+  mii_to_rmii_proc : process (clk_50_en, mii_txd_i, mii_txd_buffer)

+  begin

+    if clk_50_en = '0' then

+      rmii_txd_o  <= mii_txd_buffer(1 downto 0); 

+    else

+      rmii_txd_o  <= mii_txd_buffer(3 downto 2);

+    end if;

+  end process;

+

+  rmii_tx_en_proc: process (reset_n_i, clk_50_i) 

+  begin

+    if reset_n_i = '0' then

+        rmii_tx_en_o      <= '0';

+    elsif rising_edge(clk_50_i) then      

+      if clk_50_en = '1' then           -- data changes after a beginning of 25MHz cycle

+        mii_txd_buffer  <= mii_txd_i; 

+        rmii_tx_en_o    <= mii_tx_en_i;

+      end if;

+    end if;

+  end process;

+    

+  -----------------------------------------------------------------

+

+

+  -----------------------------------------------------------------

+  -- Data Muxing from PHY to MAC

+  -----------------------------------------------------------------

+

+  -- Data buffern

+  buffer_proc: process (reset_n_i, clk_50_i) 

+  begin

+    if reset_n_i = '0' then

+     rmii_rxd_buffer                <= (others => '0');

+    elsif rising_edge(clk_50_i) then

+        rmii_rxd_buffer(1 downto 0) <= rmii_rxd_buffer(3 downto 2);

+        rmii_rxd_buffer(3 downto 2) <= rmii_rxd_buffer(5 downto 4);

+        rmii_rxd_buffer(5 downto 4) <= rmii_rxd_i;

+    end if;

+  end process;

+

+  rmii_rx_dv_proc: process (reset_n_i, clk_50_i) 

+  begin

+    if reset_n_i = '0' then

+      mii_rx_dv_f                  <= '0';

+      mii_rx_dv_ff                 <= '0';

+      mii_rxd_o                    <= (others => '0');

+    elsif rising_edge(clk_50_i) then

+      if clk_50_en = '1' then   

+

+        if rmii_valid_sof = '1' then --only valid if the packet from phy is valid

+          mii_rx_dv_f                  <= rmii_rx_dv_i;

+          mii_rx_dv_ff                 <= mii_rx_dv_f;      -- valid is two 25 MHz clockcycles later

+        end if;

+

+        if buffer_cnt = 1 then                            -- depends on the rmii dv signal

+          mii_rxd_o                  <= rmii_rxd_buffer(3 downto 0);  -- Three step buffer

+        else

+          mii_rxd_o                  <= rmii_rxd_buffer(5 downto 2);  -- Two step buffer

+        end if;

+      end if;

+    end if;

+  end process;

+  mii_rx_dv_o                        <= mii_rx_dv_ff                    ;

+  

+  -- counts the 50MHz clocks before rmii dv signal goes high before a 25MHZ Clock

+  buffer_cnt_proc: process (reset_n_i, clk_50_i) 

+  begin

+    if reset_n_i = '0' then

+      buffer_cnt                      <= 0;

+    elsif rising_edge(clk_50_i) then

+      if (rmii_rx_dv_i = '1' and rmii_rx_dv_f = '0') and clk_50_en = '0' then

+        buffer_cnt                    <= 1;

+      elsif (rmii_rx_dv_i = '1' and rmii_rx_dv_f = '0') and clk_50_en = '1' then

+        buffer_cnt                    <= 0;

+      end if;

+    end if;

+  end process;

+  

+  rmii_valid_sof_proc: process (reset_n_i, clk_50_i) 

+  begin

+    if reset_n_i = '0' then

+      rmii_valid_sof                  <= '0';

+      rmii_rx_dv_f                    <= '0';

+    elsif rising_edge(clk_50_i) then

+      rmii_rx_dv_f                    <= rmii_rx_dv_i;

+      if rmii_crs_i = '1' and rmii_rx_dv_f = '0' and rmii_rx_dv_i = '1' then -- start of a valid frame

+        rmii_valid_sof                <= '1';

+      end if;

+    end if;

+  end process;

+

+

+

+

+

+

+end behavior;