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freebsd-dev/sys/dev/mii/mii.h

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This commit adds support for the NetBSD MII abstraction layer and MII-compliant PHY drivers. Many 10/100 ethernet NICs available today either use an MII transceiver or have built-in transceivers that can be programmed using an MII interface. It makes sense then to separate this support out into common code instead of duplicating it in all of the NIC drivers. The mii code also handles all of the media detection, selection and reporting via the ifmedia interface. This is basically the same code from NetBSD's /sys/dev/mii, except it's been adapted to FreeBSD's bus architecture. The advantage to this is that it automatically allows everything to be turned into a loadable module. There are some common functions for use in drivers once an miibus has been attached (mii_mediachg(), mii_pollstat(), mii_tick()) as well as individual PHY drivers. There is also a generic driver for all PHYs that aren't handled by a specific driver. It's possible to do this because all 10/100 PHYs implement the same general register set in addition to their vendor-specific register sets, so for the most part you can use one driver for pretty much any PHY. There are a couple of oddball exceptions though, hence the need to have specific drivers. There are two layers: the generic "miibus" layer and the PHY driver layer. The drivers are child devices of "miibus" and the "miibus" is a child of a given NIC driver. The "miibus" code and the PHY drivers can actually be compiled and kldoaded as completely separate modules or compiled together into one module. For the moment I'm using the latter approach since the code is relatively small. Currently there are only three PHY drivers here: the generic driver, the built-in 3Com XL driver and the NS DP83840 driver. I'll be adding others later as I convert various NIC drivers to use this code. I realize that I'm cvs adding this stuff instead of importing it onto a separate vendor branch, but in my opinion the import approach doesn't really offer any significant advantage: I'm going to be maintaining this stuff and writing my own PHY drivers one way or the other.
1999-08-21 17:40:53 +00:00
/* $NetBSD: mii.h,v 1.1 1998/08/10 23:55:17 thorpej Exp $ */
/*
* Copyright (c) 1997 Manuel Bouyer. All rights reserved.
*
* Modification to match BSD/OS 3.0 MII interface by Jason R. Thorpe,
* Numerical Aerospace Simulation Facility, NASA Ames Research Center.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Manuel Bouyer.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
$Id$ -> $FreeBSD$
1999-08-28 01:08:13 +00:00
* $FreeBSD$
This commit adds support for the NetBSD MII abstraction layer and MII-compliant PHY drivers. Many 10/100 ethernet NICs available today either use an MII transceiver or have built-in transceivers that can be programmed using an MII interface. It makes sense then to separate this support out into common code instead of duplicating it in all of the NIC drivers. The mii code also handles all of the media detection, selection and reporting via the ifmedia interface. This is basically the same code from NetBSD's /sys/dev/mii, except it's been adapted to FreeBSD's bus architecture. The advantage to this is that it automatically allows everything to be turned into a loadable module. There are some common functions for use in drivers once an miibus has been attached (mii_mediachg(), mii_pollstat(), mii_tick()) as well as individual PHY drivers. There is also a generic driver for all PHYs that aren't handled by a specific driver. It's possible to do this because all 10/100 PHYs implement the same general register set in addition to their vendor-specific register sets, so for the most part you can use one driver for pretty much any PHY. There are a couple of oddball exceptions though, hence the need to have specific drivers. There are two layers: the generic "miibus" layer and the PHY driver layer. The drivers are child devices of "miibus" and the "miibus" is a child of a given NIC driver. The "miibus" code and the PHY drivers can actually be compiled and kldoaded as completely separate modules or compiled together into one module. For the moment I'm using the latter approach since the code is relatively small. Currently there are only three PHY drivers here: the generic driver, the built-in 3Com XL driver and the NS DP83840 driver. I'll be adding others later as I convert various NIC drivers to use this code. I realize that I'm cvs adding this stuff instead of importing it onto a separate vendor branch, but in my opinion the import approach doesn't really offer any significant advantage: I'm going to be maintaining this stuff and writing my own PHY drivers one way or the other.
1999-08-21 17:40:53 +00:00
*/
#ifndef _DEV_MII_MII_H_
#define _DEV_MII_MII_H_
/*
* Registers common to all PHYs.
*/
#define MII_NPHY 32 /* max # of PHYs per MII */
/*
* MII commands, used if a device must drive the MII lines
* manually.
*/
#define MII_COMMAND_START 0x01
#define MII_COMMAND_READ 0x02
#define MII_COMMAND_WRITE 0x01
#define MII_COMMAND_ACK 0x02
#define MII_BMCR 0x00 /* Basic mode control register (rw) */
#define BMCR_RESET 0x8000 /* reset */
#define BMCR_LOOP 0x4000 /* loopback */
#define BMCR_S100 0x2000 /* speed (10/100) select */
#define BMCR_AUTOEN 0x1000 /* autonegotiation enable */
#define BMCR_PDOWN 0x0800 /* power down */
#define BMCR_ISO 0x0400 /* isolate */
#define BMCR_STARTNEG 0x0200 /* restart autonegotiation */
#define BMCR_FDX 0x0100 /* Set duplex mode */
#define BMCR_CTEST 0x0080 /* collision test */
#define MII_BMSR 0x01 /* Basic mode status register (ro) */
#define BMSR_100T4 0x8000 /* 100 base T4 capable */
#define BMSR_100TXFDX 0x4000 /* 100 base Tx full duplex capable */
#define BMSR_100TXHDX 0x2000 /* 100 base Tx half duplex capable */
#define BMSR_10TFDX 0x1000 /* 10 base T full duplex capable */
#define BMSR_10THDX 0x0800 /* 10 base T half duplex capable */
#define BMSR_ACOMP 0x0020 /* Autonegotiation complete */
#define BMSR_RFAULT 0x0010 /* Link partner fault */
#define BMSR_ANEG 0x0008 /* Autonegotiation capable */
#define BMSR_LINK 0x0004 /* Link status */
#define BMSR_JABBER 0x0002 /* Jabber detected */
#define BMSR_EXT 0x0001 /* Extended capability */
#define BMSR_MEDIAMASK (BMSR_100T4|BMSR_100TXFDX|BMSR_100TXHDX|BMSR_10TFDX| \
BMSR_10THDX|BMSR_ANEG)
/*
* Convert BMSR media capabilities to ANAR bits for autonegotiation.
* Note the shift chopps off the BMSR_ANEG bit.
*/
#define BMSR_MEDIA_TO_ANAR(x) (((x) & BMSR_MEDIAMASK) >> 6)
#define MII_PHYIDR1 0x02 /* ID register 1 (ro) */
#define MII_PHYIDR2 0x03 /* ID register 2 (ro) */
#define IDR2_OUILSB 0xfc00 /* OUI LSB */
#define IDR2_MODEL 0x03f0 /* vendor model */
#define IDR2_REV 0x000f /* vendor revision */
#define MII_OUI(id1, id2) (((id1) << 6) | ((id2) >> 10))
#define MII_MODEL(id2) (((id2) & IDR2_MODEL) >> 4)
#define MII_REV(id2) ((id2) & IDR2_REV)
#define MII_ANAR 0x04 /* Autonegotiation advertisement (rw) */
#define ANAR_NP 0x8000 /* Next page (ro) */
#define ANAR_ACK 0x4000 /* link partner abilities acknowledged (ro) */
#define ANAR_RF 0x2000 /* remote fault (ro) */
#define ANAR_T4 0x0200 /* local device supports 100bT4 */
#define ANAR_TX_FD 0x0100 /* local device supports 100bTx FD */
#define ANAR_TX 0x0080 /* local device supports 100bTx */
#define ANAR_10_FD 0x0040 /* local device supports 10bT FD */
#define ANAR_10 0x0020 /* local device supports 10bT */
#define ANAR_CSMA 0x0001 /* protocol selector CSMA/CD */
#define MII_ANLPAR 0x05 /* Autonegotiation lnk partner abilities (rw) */
#define ANLPAR_NP 0x8000 /* Next page (ro) */
#define ANLPAR_ACK 0x4000 /* link partner accepted ACK (ro) */
#define ANLPAR_RF 0x2000 /* remote fault (ro) */
#define ANLPAR_T4 0x0200 /* link partner supports 100bT4 */
#define ANLPAR_TX_FD 0x0100 /* link partner supports 100bTx FD */
#define ANLPAR_TX 0x0080 /* link partner supports 100bTx */
#define ANLPAR_10_FD 0x0040 /* link partner supports 10bT FD */
#define ANLPAR_10 0x0020 /* link partner supports 10bT */
#define ANLPAR_CSMA 0x0001 /* protocol selector CSMA/CD */
#define MII_ANER 0x06 /* Autonegotiation expansion (ro) */
#define ANER_MLF 0x0010 /* multiple link detection fault */
#define ANER_LPNP 0x0008 /* link parter next page-able */
#define ANER_NP 0x0004 /* next page-able */
#define ANER_PAGE_RX 0x0002 /* Page received */
#define ANER_LPAN 0x0001 /* link parter autoneg-able */
#endif /* _DEV_MII_MII_H_ */
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