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eth: Move SGMII auto-switching later in AN process

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Signed-off-by: Alex Forencich <alex@alexforencich.com>
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Alex Forencich
2026-07-06 23:36:58 -07:00
parent 85281bb5aa
commit df279e1bf5
1 changed files with 18 additions and 18 deletions
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36
src/eth/rtl/taxi_eth_phy_1g_basex_an.sv
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@@ -222,22 +222,7 @@ always_comb begin
if (rx_an_ability_match && rx_an_cfg != 0) begin
// got ability advertisement from link partner
an_lp_adv_ability_next = rx_an_cfg;
if (rx_an_cfg[0] == an_sgmii_mode_reg) begin
// mode matches
state_next = STATE_ACK_DET;
end else begin
// mode mismatch, restart
if (an_sgmii_auto) begin
// in SGMII auto mode, switch modes after a few mismatches
if (&mode_mismatch_cnt_reg) begin
mode_mismatch_cnt_next = '0;
an_sgmii_mode_next = rx_an_cfg[0];
end else begin
mode_mismatch_cnt_next = mode_mismatch_cnt_reg + 1;
end
end
state_next = STATE_START;
end
state_next = STATE_ACK_DET;
end else if (!timeout_run_reg && an_timeout_en) begin
// timed out, no AN response from link partner
an_timeout_next = 1'b1;
@@ -283,8 +268,23 @@ always_comb begin
state_next = STATE_START;
end else if (!delay_run_reg) begin
// link timer expired
delay_run_next = 1'b1;
state_next = STATE_IDLE_DET;
if (an_lp_adv_ability_reg[0] == an_sgmii_mode_reg) begin
// mode matches
delay_run_next = 1'b1;
state_next = STATE_IDLE_DET;
end else begin
// mode mismatch, restart
if (an_sgmii_auto) begin
// in SGMII auto mode, switch modes after a few mismatches
if (&mode_mismatch_cnt_reg) begin
mode_mismatch_cnt_next = '0;
an_sgmii_mode_next = rx_an_cfg[0];
end else begin
mode_mismatch_cnt_next = mode_mismatch_cnt_reg + 1;
end
end
state_next = STATE_START;
end
end else begin
state_next = STATE_ACK_CPL;
end