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ce4946daa5
freebsd/sys/dev/mii/nsgphy.c
Bill Paul ce4946daa5 Add support for gigabit ethernet cards based on the NatSemi DP83820 
and DP83821 gigabit ethernet MAC chips and the NatSemi DP83861 10/100/1000
copper PHY. There are a whole bunch of very low cost cards available with
this chipset selling for $150USD or less. This includes the SMC9462TX,
D-Link DGE-500T, Asante GigaNIX 1000TA and 1000TPC, and a couple cards
from Addtron.

This chip supports TCP/IP checksum offload, VLAN tagging/insertion.
2048-bit multicast filter, jumbograms and has 8K TX and 32K RX FIFOs.
I have not done serious performance testing with this driver. I know
it works, and I want it under CVS control so I can keep tabs on it.
Note that there's no serious mutex stuff in here yet either: I need
to talk more with jhb to figure out the right way to do this. That
said, I don't think there will be any problems.

This driver should also work on the alpha. It's not turned on in
GENERIC.
2001-05-11 19:56:39 +00:00

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/*
* Copyright (c) 2001 Wind River Systems
* Copyright (c) 2001
* Bill Paul <wpaul@bsdi.com>. All rights reserved.
*
* 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 Bill Paul.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``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 Bill Paul OR THE VOICES IN HIS HEAD
* 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.
*
* $FreeBSD$
*/
/*
* Driver for the National Semiconductor DP83891 and DP83861
* 10/100/1000 PHYs.
* Datasheet available at: http://www.national.com/ds/DP/DP83861.pdf
*
* The DP83891 is the older NatSemi gigE PHY which isn't being sold
* anymore. The DP83861 is its replacement, which is an 'enhanced'
* firmware driven component. The major difference between the
* two is that the 83891 can't generate interrupts, while the
* 83861 can. (I think it wasn't originally designed to do this, but
* it can now thanks to firmware updates.) The 83861 also allows
* access to its internal RAM via indirect register access.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/bus.h>
#include <machine/clock.h>
#include <net/if.h>
#include <net/if_media.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/mii/miidevs.h>
#include <dev/mii/nsgphyreg.h>
#include "miibus_if.h"
#if !defined(lint)
static const char rcsid[] =
"$FreeBSD$";
#endif
static int nsgphy_probe __P((device_t));
static int nsgphy_attach __P((device_t));
static int nsgphy_detach __P((device_t));
static device_method_t nsgphy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, nsgphy_probe),
DEVMETHOD(device_attach, nsgphy_attach),
DEVMETHOD(device_detach, nsgphy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
{ 0, 0 }
};
static devclass_t nsgphy_devclass;
static driver_t nsgphy_driver = {
"nsgphy",
nsgphy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(nsgphy, miibus, nsgphy_driver, nsgphy_devclass, 0, 0);
int nsgphy_service __P((struct mii_softc *, struct mii_data *, int));
void nsgphy_status __P((struct mii_softc *));
static int nsgphy_mii_phy_auto __P((struct mii_softc *, int));
extern void mii_phy_auto_timeout __P((void *));
static int nsgphy_probe(dev)
device_t dev;
{
struct mii_attach_args *ma;
ma = device_get_ivars(dev);
if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_NATSEMI) {
if (MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83891) {
device_set_desc(dev, MII_STR_NATSEMI_DP83891);
return(0);
}
if (MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83861) {
device_set_desc(dev, MII_STR_NATSEMI_DP83861);
return(0);
}
}
return(ENXIO);
}
static int nsgphy_attach(dev)
device_t dev;
{
struct mii_softc *sc;
struct mii_attach_args *ma;
struct mii_data *mii;
const char *sep = "";
sc = device_get_softc(dev);
ma = device_get_ivars(dev);
sc->mii_dev = device_get_parent(dev);
mii = device_get_softc(sc->mii_dev);
LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
sc->mii_inst = mii->mii_instance;
sc->mii_phy = ma->mii_phyno;
sc->mii_service = nsgphy_service;
sc->mii_pdata = mii;
sc->mii_flags |= MIIF_NOISOLATE;
mii->mii_instance++;
#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
#define PRINT(s) printf("%s%s", sep, s); sep = ", "
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
BMCR_ISO);
#if 0
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
BMCR_LOOP|BMCR_S100);
#endif
mii_phy_reset(sc);
device_printf(dev, " ");
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_TX, IFM_FDX, sc->mii_inst),
NSGPHY_S1000|NSGPHY_BMCR_FDX);
PRINT("1000baseTX-FDX");
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_TX, 0, sc->mii_inst),
NSGPHY_S1000);
PRINT("1000baseTX");
sc->mii_capabilities =
(PHY_READ(sc, MII_BMSR) |
(BMSR_10TFDX|BMSR_10THDX)) & ma->mii_capmask;
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst),
NSGPHY_S100|NSGPHY_BMCR_FDX);
PRINT("100baseTX-FDX");
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst), NSGPHY_S100);
PRINT("100baseTX");
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst),
NSGPHY_S10|NSGPHY_BMCR_FDX);
PRINT("10baseT-FDX");
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst), NSGPHY_S10);
PRINT("10baseT");
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0);
PRINT("auto");
printf("\n");
#undef ADD
#undef PRINT
MIIBUS_MEDIAINIT(sc->mii_dev);
return(0);
}
static int nsgphy_detach(dev)
device_t dev;
{
struct mii_softc *sc;
struct mii_data *mii;
sc = device_get_softc(dev);
mii = device_get_softc(device_get_parent(dev));
if (sc->mii_flags & MIIF_DOINGAUTO)
untimeout(mii_phy_auto_timeout, sc, sc->mii_auto_ch);
sc->mii_dev = NULL;
LIST_REMOVE(sc, mii_list);
return(0);
}
int
nsgphy_service(sc, mii, cmd)
struct mii_softc *sc;
struct mii_data *mii;
int cmd;
{
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
int reg;
switch (cmd) {
case MII_POLLSTAT:
/*
* If we're not polling our PHY instance, just return.
*/
if (IFM_INST(ife->ifm_media) != sc->mii_inst)
return (0);
break;
case MII_MEDIACHG:
/*
* If the media indicates a different PHY instance,
* isolate ourselves.
*/
if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
reg = PHY_READ(sc, MII_BMCR);
PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
return (0);
}
/*
* If the interface is not up, don't do anything.
*/
if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
break;
switch (IFM_SUBTYPE(ife->ifm_media)) {
case IFM_AUTO:
#ifdef foo
/*
* If we're already in auto mode, just return.
*/
if (PHY_READ(sc, NSGPHY_MII_BMCR) & NSGPHY_BMCR_AUTOEN)
return (0);
#endif
(void) nsgphy_mii_phy_auto(sc, 0);
break;
case IFM_1000_TX:
if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
PHY_WRITE(sc, NSGPHY_MII_BMCR,
NSGPHY_BMCR_FDX|NSGPHY_BMCR_SPD1);
} else {
PHY_WRITE(sc, NSGPHY_MII_BMCR,
NSGPHY_BMCR_SPD1);
}
PHY_WRITE(sc, NSGPHY_MII_ANAR, NSGPHY_SEL_TYPE);
/*
* When setting the link manually, one side must
* be the master and the other the slave. However
* ifmedia doesn't give us a good way to specify
* this, so we fake it by using one of the LINK
* flags. If LINK0 is set, we program the PHY to
* be a master, otherwise it's a slave.
*/
if ((mii->mii_ifp->if_flags & IFF_LINK0)) {
PHY_WRITE(sc, NSGPHY_MII_1000CTL,
NSGPHY_1000CTL_MSE|NSGPHY_1000CTL_MSC);
} else {
PHY_WRITE(sc, NSGPHY_MII_1000CTL,
NSGPHY_1000CTL_MSE);
}
break;
case IFM_100_T4:
/*
* XXX Not supported as a manual setting right now.
*/
return (EINVAL);
case IFM_NONE:
PHY_WRITE(sc, MII_BMCR, BMCR_ISO|BMCR_PDOWN);
break;
default:
/*
* BMCR data is stored in the ifmedia entry.
*/
PHY_WRITE(sc, MII_ANAR,
mii_anar(ife->ifm_media));
PHY_WRITE(sc, MII_BMCR, ife->ifm_data);
break;
}
break;
case MII_TICK:
/*
* If we're not currently selected, just return.
*/
if (IFM_INST(ife->ifm_media) != sc->mii_inst)
return (0);
/*
* Only used for autonegotiation.
*/
if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
return (0);
/*
* Is the interface even up?
*/
if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
return (0);
/*
* Only retry autonegotiation every 5 seconds.
* Actually, for gigE PHYs, we should wait longer, since
* 5 seconds is the mimimum time the documentation
* says to wait for a 1000mbps link to be established.
*/
if (++sc->mii_ticks != 10)
return (0);
sc->mii_ticks = 0;
/*
* Check to see if we have link.
*/
reg = PHY_READ(sc, NSGPHY_MII_PHYSUP);
if (reg & NSGPHY_PHYSUP_LNKSTS)
break;
mii_phy_reset(sc);
if (nsgphy_mii_phy_auto(sc, 0) == EJUSTRETURN)
return(0);
break;
}
/* Update the media status. */
nsgphy_status(sc);
/* Callback if something changed. */
if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) {
MIIBUS_STATCHG(sc->mii_dev);
sc->mii_active = mii->mii_media_active;
}
return (0);
}
void
nsgphy_status(sc)
struct mii_softc *sc;
{
struct mii_data *mii = sc->mii_pdata;
int bmsr, bmcr, physup, anlpar, gstat;
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
bmsr = PHY_READ(sc, NSGPHY_MII_BMSR);
physup = PHY_READ(sc, NSGPHY_MII_PHYSUP);
if (physup & NSGPHY_PHYSUP_LNKSTS)
mii->mii_media_status |= IFM_ACTIVE;
bmcr = PHY_READ(sc, NSGPHY_MII_BMCR);
if (bmcr & NSGPHY_BMCR_LOOP)
mii->mii_media_active |= IFM_LOOP;
if (bmcr & NSGPHY_BMCR_AUTOEN) {
if ((bmsr & NSGPHY_BMSR_ACOMP) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
anlpar = PHY_READ(sc, NSGPHY_MII_ANLPAR);
gstat = PHY_READ(sc, NSGPHY_MII_1000STS);
if (gstat & NSGPHY_1000STS_LPFD)
mii->mii_media_active |= IFM_1000_TX|IFM_FDX;
else if (gstat & NSGPHY_1000STS_LPHD)
mii->mii_media_active |= IFM_1000_TX|IFM_HDX;
else if (anlpar & NSGPHY_ANLPAR_100T4)
mii->mii_media_active |= IFM_100_T4;
else if (anlpar & NSGPHY_ANLPAR_100FDX)
mii->mii_media_active |= IFM_100_TX|IFM_FDX;
else if (anlpar & NSGPHY_ANLPAR_100HDX)
mii->mii_media_active |= IFM_100_TX;
else if (anlpar & NSGPHY_ANLPAR_10FDX)
mii->mii_media_active |= IFM_10_T|IFM_FDX;
else if (anlpar & NSGPHY_ANLPAR_10HDX)
mii->mii_media_active |= IFM_10_T|IFM_HDX;
else
mii->mii_media_active |= IFM_NONE;
return;
}
switch(bmcr & (NSGPHY_BMCR_SPD1|NSGPHY_BMCR_SPD0)) {
case NSGPHY_S1000:
mii->mii_media_active |= IFM_1000_TX;
break;
case NSGPHY_S100:
mii->mii_media_active |= IFM_100_TX;
break;
case NSGPHY_S10:
mii->mii_media_active |= IFM_10_T;
break;
default:
break;
}
if (bmcr & NSGPHY_BMCR_FDX)
mii->mii_media_active |= IFM_FDX;
else
mii->mii_media_active |= IFM_HDX;
return;
}
static int
nsgphy_mii_phy_auto(mii, waitfor)
struct mii_softc *mii;
int waitfor;
{
int bmsr, ktcr = 0, i;
if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) {
mii_phy_reset(mii);
PHY_WRITE(mii, NSGPHY_MII_BMCR, 0);
DELAY(1000);
ktcr = PHY_READ(mii, NSGPHY_MII_1000CTL);
PHY_WRITE(mii, NSGPHY_MII_1000CTL, ktcr |
(NSGPHY_1000CTL_AFD|NSGPHY_1000CTL_AHD));
ktcr = PHY_READ(mii, NSGPHY_MII_1000CTL);
DELAY(1000);
PHY_WRITE(mii, NSGPHY_MII_ANAR,
BMSR_MEDIA_TO_ANAR(mii->mii_capabilities) | ANAR_CSMA);
DELAY(1000);
PHY_WRITE(mii, NSGPHY_MII_BMCR,
NSGPHY_BMCR_AUTOEN | NSGPHY_BMCR_STARTNEG);
}
if (waitfor) {
/* Wait 500ms for it to complete. */
for (i = 0; i < 500; i++) {
if ((bmsr = PHY_READ(mii, NSGPHY_MII_BMSR)) &
NSGPHY_BMSR_ACOMP)
return (0);
DELAY(1000);
#if 0
if ((bmsr & BMSR_ACOMP) == 0)
printf("%s: autonegotiation failed to complete\n",
mii->mii_dev.dv_xname);
#endif
}
/*
* Don't need to worry about clearing MIIF_DOINGAUTO.
* If that's set, a timeout is pending, and it will
* clear the flag.
*/
return (EIO);
}
/*
* Just let it finish asynchronously. This is for the benefit of
* the tick handler driving autonegotiation. Don't want 500ms
* delays all the time while the system is running!
*/
if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) {
mii->mii_flags |= MIIF_DOINGAUTO;
mii->mii_auto_ch = timeout(mii_phy_auto_timeout, mii, hz >> 1);
}
return (EJUSTRETURN);
}
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