/* 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__ */
|
