begin adding phy package

2026-09-09 16:19:41 +00:00 · 2026-01-15 18:31:17 -03:00
parent 3d5999a9d8
commit 80b740827f
3 changed files with 170 additions and 0 deletions
@@ -0,0 +1,63 @@
+package phy
+
+// Registers 0..15 as defined by 802.3.
+const (
+	// First two registers are BMCR and BMSR. See below.
+
+	regPhyId1 = 0x02
+	regPhyId2 = 0x03
+
+	regAutoNegotiationAdvertisement      = 0x04
+	regAutoNegotiationLinkPartnerAbility = 0x05
+	regAutoNegotiationExpansion          = 0x05
+	regModeControlStatus                 = 0x11
+	regSpecialModes                      = 0x12
+	regSymbolErorCounter                 = 0x1a
+	regSpecialControlStatusIndications   = 0x1b
+	regIRQSourceFlag                     = 0x1d
+	regIRQMask                           = 0x1e
+	regPhySpecialScontrolStatus          = 0x1f
+)
+
+// BMCR represents the Basic Mode Control Register at address 0x00.
+// Reference: IEEE 802.3 Clause 22.2.4.1
+type BMCR uint16
+
+const (
+	BMCRAddr = 0x00
+
+	BMCRSpeed1000  BMCR = 0x0040 // MSB of Speed (1000Mbps)
+	BMCRCollision  BMCR = 0x0080 // Collision test
+	BMCRFullDuplex BMCR = 0x0100 // Full duplex mode
+	BMCRANRestart  BMCR = 0x0200 // Restart auto-negotiation
+	BMCRIsolate    BMCR = 0x0400 // Isolate PHY from MII
+	BMCRPowerDown  BMCR = 0x0800 // Power down PHY
+	BMCRANEnable   BMCR = 0x1000 // Enable auto-negotiation
+	BMCRSpeed100   BMCR = 0x2000 // Select 100Mbps
+	BMCRLoopback   BMCR = 0x4000 // Enable TXD loopback
+	BMCRReset      BMCR = 0x8000 // Software reset (self-clearing)
+)
+
+// BMSR represents the Basic Mode Status Register at address 0x01.
+// Reference: IEEE 802.3 Clause 22.2.4.2
+type BMSR uint16
+
+const (
+	BMSRAddr = 0x01
+
+	BMSRExtCap      BMSR = 0x0001 // Extended register capability
+	BMSRJabber      BMSR = 0x0002 // Jabber detected
+	BMSRLinkStatus  BMSR = 0x0004 // Link status (1=up)
+	BMSRANCap       BMSR = 0x0008 // Auto-negotiation capable
+	BMSRRemoteFault BMSR = 0x0010 // Remote fault detected
+	BMSRANComplete  BMSR = 0x0020 // Auto-negotiation complete
+	BMSRNoPreamble  BMSR = 0x0040 // Preamble suppression capable
+	BMSRExtStatus   BMSR = 0x0100 // Extended status in register 15
+	BMSR100Half2    BMSR = 0x0200 // 100BASE-T2 half-duplex capable
+	BMSR100Full2    BMSR = 0x0400 // 100BASE-T2 full-duplex capable
+	BMSR10Half      BMSR = 0x0800 // 10Mbps half-duplex capable
+	BMSR10Full      BMSR = 0x1000 // 10Mbps full-duplex capable
+	BMSR100Half     BMSR = 0x2000 // 100Mbps half-duplex capable
+	BMSR100Full     BMSR = 0x4000 // 100Mbps full-duplex capable
+	BMSR100Base4    BMSR = 0x8000 // 100BASE-T4 capable
+)