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Display actual link speed

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logicog
2025-12-15 06:54:41 +01:00
parent 6dfad825c0
commit 95fae8bad2
1 changed files with 35 additions and 0 deletions
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rtl837x_phy.c
+35
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@@ -282,6 +282,41 @@ void phy_show(uint8_t port) __banked
{
uint16_t v;
// The actual PHY speed is in a Realtek propriatary register
print_string("\nLink speed: ");
phy_read(port, PHY_MMD_CTRL, 0xA434);
v = SFR_DATA_U16;
v = ((v & 0x0600) >> 7) | ((v & 0x0030) >> 4);
switch(v) {
case 0:
print_string("10M");
break;
case 1:
print_string("100M");
break;
case 2:
print_string("1000M");
break;
case 3:
print_string("500M");
break;
case 4:
print_string("10G");
break;
case 5:
print_string("2500M");
break;
case 6:
print_string("5G");
break;
default:
print_string("10M");
}
if (v & 0x8)
print_string(" full duplex");
else
print_string(" half duplex");
phy_read(port, PHY_MMD_AN, 0x00);
v = SFR_DATA_U16;
if (!(v & 0x1000)) { // AN disabled, we are in forced mode