| /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| /* |
| * linux/mii.h: definitions for MII-compatible transceivers |
| * Originally drivers/net/sunhme.h. |
| * |
| * Copyright (C) 1996, 1999, 2001 David S. Miller (davem@redhat.com) |
| */ |
| |
| #ifndef __LINUX_MII_H__ |
| #define __LINUX_MII_H__ |
| |
| /* Generic MII registers. */ |
| #define MII_BMCR 0x00 /* Basic mode control register */ |
| #define MII_BMSR 0x01 /* Basic mode status register */ |
| #define MII_PHYSID1 0x02 /* PHYS ID 1 */ |
| #define MII_PHYSID2 0x03 /* PHYS ID 2 */ |
| #define MII_ADVERTISE 0x04 /* Advertisement control reg */ |
| #define MII_LPA 0x05 /* Link partner ability reg */ |
| #define MII_EXPANSION 0x06 /* Expansion register */ |
| #define MII_CTRL1000 0x09 /* 1000BASE-T control */ |
| #define MII_STAT1000 0x0a /* 1000BASE-T status */ |
| #define MII_MMD_CTRL 0x0d /* MMD Access Control Register */ |
| #define MII_MMD_DATA 0x0e /* MMD Access Data Register */ |
| #define MII_ESTATUS 0x0f /* Extended Status */ |
| #define MII_DCOUNTER 0x12 /* Disconnect counter */ |
| #define MII_FCSCOUNTER 0x13 /* False carrier counter */ |
| #define MII_NWAYTEST 0x14 /* N-way auto-neg test reg */ |
| #define MII_RERRCOUNTER 0x15 /* Receive error counter */ |
| #define MII_SREVISION 0x16 /* Silicon revision */ |
| #define MII_RESV1 0x17 /* Reserved... */ |
| #define MII_LBRERROR 0x18 /* Lpback, rx, bypass error */ |
| #define MII_PHYADDR 0x19 /* PHY address */ |
| #define MII_RESV2 0x1a /* Reserved... */ |
| #define MII_TPISTATUS 0x1b /* TPI status for 10mbps */ |
| #define MII_NCONFIG 0x1c /* Network interface config */ |
| |
| /* Basic mode control register. */ |
| #define BMCR_RESV 0x003f /* Unused... */ |
| #define BMCR_SPEED1000 0x0040 /* MSB of Speed (1000) */ |
| #define BMCR_CTST 0x0080 /* Collision test */ |
| #define BMCR_FULLDPLX 0x0100 /* Full duplex */ |
| #define BMCR_ANRESTART 0x0200 /* Auto negotiation restart */ |
| #define BMCR_ISOLATE 0x0400 /* Isolate data paths from MII */ |
| #define BMCR_PDOWN 0x0800 /* Enable low power state */ |
| #define BMCR_ANENABLE 0x1000 /* Enable auto negotiation */ |
| #define BMCR_SPEED100 0x2000 /* Select 100Mbps */ |
| #define BMCR_LOOPBACK 0x4000 /* TXD loopback bits */ |
| #define BMCR_RESET 0x8000 /* Reset to default state */ |
| #define BMCR_SPEED10 0x0000 /* Select 10Mbps */ |
| |
| /* Basic mode status register. */ |
| #define BMSR_ERCAP 0x0001 /* Ext-reg capability */ |
| #define BMSR_JCD 0x0002 /* Jabber detected */ |
| #define BMSR_LSTATUS 0x0004 /* Link status */ |
| #define BMSR_ANEGCAPABLE 0x0008 /* Able to do auto-negotiation */ |
| #define BMSR_RFAULT 0x0010 /* Remote fault detected */ |
| #define BMSR_ANEGCOMPLETE 0x0020 /* Auto-negotiation complete */ |
| #define BMSR_RESV 0x00c0 /* Unused... */ |
| #define BMSR_ESTATEN 0x0100 /* Extended Status in R15 */ |
| #define BMSR_100HALF2 0x0200 /* Can do 100BASE-T2 HDX */ |
| #define BMSR_100FULL2 0x0400 /* Can do 100BASE-T2 FDX */ |
| #define BMSR_10HALF 0x0800 /* Can do 10mbps, half-duplex */ |
| #define BMSR_10FULL 0x1000 /* Can do 10mbps, full-duplex */ |
| #define BMSR_100HALF 0x2000 /* Can do 100mbps, half-duplex */ |
| #define BMSR_100FULL 0x4000 /* Can do 100mbps, full-duplex */ |
| #define BMSR_100BASE4 0x8000 /* Can do 100mbps, 4k packets */ |
| |
| /* Advertisement control register. */ |
| #define ADVERTISE_SLCT 0x001f /* Selector bits */ |
| #define ADVERTISE_CSMA 0x0001 /* Only selector supported */ |
| #define ADVERTISE_10HALF 0x0020 /* Try for 10mbps half-duplex */ |
| #define ADVERTISE_1000XFULL 0x0020 /* Try for 1000BASE-X full-duplex */ |
| #define ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */ |
| #define ADVERTISE_1000XHALF 0x0040 /* Try for 1000BASE-X half-duplex */ |
| #define ADVERTISE_100HALF 0x0080 /* Try for 100mbps half-duplex */ |
| #define ADVERTISE_1000XPAUSE 0x0080 /* Try for 1000BASE-X pause */ |
| #define ADVERTISE_100FULL 0x0100 /* Try for 100mbps full-duplex */ |
| #define ADVERTISE_1000XPSE_ASYM 0x0100 /* Try for 1000BASE-X asym pause */ |
| #define ADVERTISE_100BASE4 0x0200 /* Try for 100mbps 4k packets */ |
| #define ADVERTISE_PAUSE_CAP 0x0400 /* Try for pause */ |
| #define ADVERTISE_PAUSE_ASYM 0x0800 /* Try for asymetric pause */ |
| #define ADVERTISE_RESV 0x1000 /* Unused... */ |
| #define ADVERTISE_RFAULT 0x2000 /* Say we can detect faults */ |
| #define ADVERTISE_LPACK 0x4000 /* Ack link partners response */ |
| #define ADVERTISE_NPAGE 0x8000 /* Next page bit */ |
| |
| #define ADVERTISE_FULL (ADVERTISE_100FULL | ADVERTISE_10FULL | \ |
| ADVERTISE_CSMA) |
| #define ADVERTISE_ALL (ADVERTISE_10HALF | ADVERTISE_10FULL | \ |
| ADVERTISE_100HALF | ADVERTISE_100FULL) |
| |
| /* Link partner ability register. */ |
| #define LPA_SLCT 0x001f /* Same as advertise selector */ |
| #define LPA_10HALF 0x0020 /* Can do 10mbps half-duplex */ |
| #define LPA_1000XFULL 0x0020 /* Can do 1000BASE-X full-duplex */ |
| #define LPA_10FULL 0x0040 /* Can do 10mbps full-duplex */ |
| #define LPA_1000XHALF 0x0040 /* Can do 1000BASE-X half-duplex */ |
| #define LPA_100HALF 0x0080 /* Can do 100mbps half-duplex */ |
| #define LPA_1000XPAUSE 0x0080 /* Can do 1000BASE-X pause */ |
| #define LPA_100FULL 0x0100 /* Can do 100mbps full-duplex */ |
| #define LPA_1000XPAUSE_ASYM 0x0100 /* Can do 1000BASE-X pause asym*/ |
| #define LPA_100BASE4 0x0200 /* Can do 100mbps 4k packets */ |
| #define LPA_PAUSE_CAP 0x0400 /* Can pause */ |
| #define LPA_PAUSE_ASYM 0x0800 /* Can pause asymetrically */ |
| #define LPA_RESV 0x1000 /* Unused... */ |
| #define LPA_RFAULT 0x2000 /* Link partner faulted */ |
| #define LPA_LPACK 0x4000 /* Link partner acked us */ |
| #define LPA_NPAGE 0x8000 /* Next page bit */ |
| |
| #define LPA_DUPLEX (LPA_10FULL | LPA_100FULL) |
| #define LPA_100 (LPA_100FULL | LPA_100HALF | LPA_100BASE4) |
| |
| /* Expansion register for auto-negotiation. */ |
| #define EXPANSION_NWAY 0x0001 /* Can do N-way auto-nego */ |
| #define EXPANSION_LCWP 0x0002 /* Got new RX page code word */ |
| #define EXPANSION_ENABLENPAGE 0x0004 /* This enables npage words */ |
| #define EXPANSION_NPCAPABLE 0x0008 /* Link partner supports npage */ |
| #define EXPANSION_MFAULTS 0x0010 /* Multiple faults detected */ |
| #define EXPANSION_RESV 0xffe0 /* Unused... */ |
| |
| #define ESTATUS_1000_XFULL 0x8000 /* Can do 1000BX Full */ |
| #define ESTATUS_1000_XHALF 0x4000 /* Can do 1000BX Half */ |
| #define ESTATUS_1000_TFULL 0x2000 /* Can do 1000BT Full */ |
| #define ESTATUS_1000_THALF 0x1000 /* Can do 1000BT Half */ |
| |
| /* N-way test register. */ |
| #define NWAYTEST_RESV1 0x00ff /* Unused... */ |
| #define NWAYTEST_LOOPBACK 0x0100 /* Enable loopback for N-way */ |
| #define NWAYTEST_RESV2 0xfe00 /* Unused... */ |
| |
| /* 1000BASE-T Control register */ |
| #define ADVERTISE_1000FULL 0x0200 /* Advertise 1000BASE-T full duplex */ |
| #define ADVERTISE_1000HALF 0x0100 /* Advertise 1000BASE-T half duplex */ |
| #define CTL1000_AS_MASTER 0x0800 |
| #define CTL1000_ENABLE_MASTER 0x1000 |
| |
| /* 1000BASE-T Status register */ |
| #define LPA_1000LOCALRXOK 0x2000 /* Link partner local receiver status */ |
| #define LPA_1000REMRXOK 0x1000 /* Link partner remote receiver status */ |
| #define LPA_1000FULL 0x0800 /* Link partner 1000BASE-T full duplex */ |
| #define LPA_1000HALF 0x0400 /* Link partner 1000BASE-T half duplex */ |
| |
| /* Flow control flags */ |
| #define FLOW_CTRL_TX 0x01 |
| #define FLOW_CTRL_RX 0x02 |
| |
| /* MMD Access Control register fields */ |
| #define MII_MMD_CTRL_DEVAD_MASK 0x1f /* Mask MMD DEVAD*/ |
| #define MII_MMD_CTRL_ADDR 0x0000 /* Address */ |
| #define MII_MMD_CTRL_NOINCR 0x4000 /* no post increment */ |
| #define MII_MMD_CTRL_INCR_RDWT 0x8000 /* post increment on reads & writes */ |
| #define MII_MMD_CTRL_INCR_ON_WT 0xC000 /* post increment on writes only */ |
| |
| /** |
| * mii_nway_result |
| * @negotiated: value of MII ANAR and'd with ANLPAR |
| * |
| * Given a set of MII abilities, check each bit and returns the |
| * currently supported media, in the priority order defined by |
| * IEEE 802.3u. We use LPA_xxx constants but note this is not the |
| * value of LPA solely, as described above. |
| * |
| * The one exception to IEEE 802.3u is that 100baseT4 is placed |
| * between 100T-full and 100T-half. If your phy does not support |
| * 100T4 this is fine. If your phy places 100T4 elsewhere in the |
| * priority order, you will need to roll your own function. |
| */ |
| static inline unsigned int mii_nway_result (unsigned int negotiated) |
| { |
| unsigned int ret; |
| |
| if (negotiated & LPA_100FULL) |
| ret = LPA_100FULL; |
| else if (negotiated & LPA_100BASE4) |
| ret = LPA_100BASE4; |
| else if (negotiated & LPA_100HALF) |
| ret = LPA_100HALF; |
| else if (negotiated & LPA_10FULL) |
| ret = LPA_10FULL; |
| else |
| ret = LPA_10HALF; |
| |
| return ret; |
| } |
| |
| /** |
| * mii_duplex |
| * @duplex_lock: Non-zero if duplex is locked at full |
| * @negotiated: value of MII ANAR and'd with ANLPAR |
| * |
| * A small helper function for a common case. Returns one |
| * if the media is operating or locked at full duplex, and |
| * returns zero otherwise. |
| */ |
| static inline unsigned int mii_duplex (unsigned int duplex_lock, |
| unsigned int negotiated) |
| { |
| if (duplex_lock) |
| return 1; |
| if (mii_nway_result(negotiated) & LPA_DUPLEX) |
| return 1; |
| return 0; |
| } |
| |
| /** |
| * mii_resolve_flowctrl_fdx |
| * @lcladv: value of MII ADVERTISE register |
| * @rmtadv: value of MII LPA register |
| * |
| * Resolve full duplex flow control as per IEEE 802.3-2005 table 28B-3 |
| */ |
| static inline u8 mii_resolve_flowctrl_fdx(u16 lcladv, u16 rmtadv) |
| { |
| u8 cap = 0; |
| |
| if (lcladv & rmtadv & ADVERTISE_PAUSE_CAP) { |
| cap = FLOW_CTRL_TX | FLOW_CTRL_RX; |
| } else if (lcladv & rmtadv & ADVERTISE_PAUSE_ASYM) { |
| if (lcladv & ADVERTISE_PAUSE_CAP) |
| cap = FLOW_CTRL_RX; |
| else if (rmtadv & ADVERTISE_PAUSE_CAP) |
| cap = FLOW_CTRL_TX; |
| } |
| |
| return cap; |
| } |
| |
| #endif /* __LINUX_MII_H__ */ |
