From c913e05fb214dc84c2288626fd33ab6eea2789ab Mon Sep 17 00:00:00 2001 From: Tobias Klauser Date: Wed, 19 Jan 2011 17:15:07 +0100 Subject: Update rmii_phy_to_mii_mac.vhd from upstream --- lib/ethernet/components/rmii_phy_to_mii_mac.vhd | 19 ++++--------------- 1 file changed, 4 insertions(+), 15 deletions(-) (limited to 'lib') diff --git a/lib/ethernet/components/rmii_phy_to_mii_mac.vhd b/lib/ethernet/components/rmii_phy_to_mii_mac.vhd index 09227c6..56d5302 100644 --- a/lib/ethernet/components/rmii_phy_to_mii_mac.vhd +++ b/lib/ethernet/components/rmii_phy_to_mii_mac.vhd @@ -30,7 +30,7 @@ package rmii_phy_to_mii_mac_pkg is reset_n_i : in std_logic; clk_25_i : in std_logic; clk_50_i : in std_logic; - rmii_crs_i : in std_logic; + rmii_link_i : in std_logic; -- Transmit Path mii_tx_en_i : in std_logic; @@ -56,7 +56,7 @@ entity rmii_phy_to_mii_mac is reset_n_i : in std_logic; clk_25_i : in std_logic; clk_50_i : in std_logic; - rmii_crs_i : in std_logic; + rmii_link_i : in std_logic; -- Transmit Path mii_tx_en_i : in std_logic; @@ -75,8 +75,6 @@ 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); @@ -85,7 +83,6 @@ architecture behavior of rmii_phy_to_mii_mac is 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 @@ -166,12 +163,8 @@ begin 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 @@ -180,7 +173,7 @@ begin end if; end if; end process; - mii_rx_dv_o <= mii_rx_dv_ff ; + 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) @@ -196,16 +189,12 @@ begin end if; end process; - rmii_valid_sof_proc: process (reset_n_i, clk_50_i) + input_register: 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; -- cgit v1.2.3-54-g00ecf