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freebsd-dev/sys/dev/mii/rgephy.c
Pyun YongHyeon fed3ed710d Prefer RL_GMEDIASTAT register to RGEPHY_MII_SSR register to 
extract a link status of PHY when parent driver is re(4).
RGEPHY_MII_SSR register does not seem to report correct PHY status
on some integrated PHYs used with re(4).
Unfortunately, RealTek PHYs have no additional information to
differentiate integrated PHYs from external ones so relying on PHY
model number is not enough to know that.  However, it seems
RGEPHY_MII_SSR register exists for external RealTek PHYs so
checking parent driver would be good indication to know which PHY
was used. In other words, for non-re(4) controllers, the PHY is
external one and its revision number is greater than or equal to 2.
This change fixes intermittent link UP/DOWN messages reported on
RTL8169 controller.

Also, mii_attach(9) is tried after setting interface name since
rgephy(4) have to know parent driver name.

PR:	kern/165509
2012-02-28 05:23:29 +00:00

506 lines
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/*-
* Copyright (c) 2003
* Bill Paul <wpaul@windriver.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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* Driver for the RealTek 8169S/8110S/8211B/8211C internal 10/100/1000 PHY.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/socket.h>
#include <sys/bus.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/if_media.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include "miidevs.h"
#include <dev/mii/rgephyreg.h>
#include "miibus_if.h"
#include <machine/bus.h>
#include <pci/if_rlreg.h>
static int rgephy_probe(device_t);
static int rgephy_attach(device_t);
static device_method_t rgephy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, rgephy_probe),
DEVMETHOD(device_attach, rgephy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD_END
};
static devclass_t rgephy_devclass;
static driver_t rgephy_driver = {
"rgephy",
rgephy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(rgephy, miibus, rgephy_driver, rgephy_devclass, 0, 0);
static int rgephy_service(struct mii_softc *, struct mii_data *, int);
static void rgephy_status(struct mii_softc *);
static int rgephy_mii_phy_auto(struct mii_softc *, int);
static void rgephy_reset(struct mii_softc *);
static void rgephy_loop(struct mii_softc *);
static void rgephy_load_dspcode(struct mii_softc *);
static const struct mii_phydesc rgephys[] = {
MII_PHY_DESC(REALTEK, RTL8169S),
MII_PHY_END
};
static const struct mii_phy_funcs rgephy_funcs = {
rgephy_service,
rgephy_status,
rgephy_reset
};
static int
rgephy_probe(device_t dev)
{
return (mii_phy_dev_probe(dev, rgephys, BUS_PROBE_DEFAULT));
}
static int
rgephy_attach(device_t dev)
{
struct mii_softc *sc;
struct mii_attach_args *ma;
u_int flags;
sc = device_get_softc(dev);
ma = device_get_ivars(dev);
flags = 0;
if (strcmp(ma->mii_data->mii_ifp->if_dname, "re") == 0)
flags |= MIIF_PHYPRIV0;
mii_phy_dev_attach(dev, flags, &rgephy_funcs, 0);
/* RTL8169S do not report auto-sense; add manually. */
sc->mii_capabilities = (PHY_READ(sc, MII_BMSR) | BMSR_ANEG) &
sc->mii_capmask;
if (sc->mii_capabilities & BMSR_EXTSTAT)
sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
device_printf(dev, " ");
mii_phy_add_media(sc);
printf("\n");
/*
* Allow IFM_FLAG0 to be set indicating that auto-negotiation with
* manual configuration, which is used to work around issues with
* certain setups by default, should not be triggered as it may in
* turn cause harm in some edge cases.
*/
sc->mii_pdata->mii_media.ifm_mask |= IFM_FLAG0;
PHY_RESET(sc);
MIIBUS_MEDIAINIT(sc->mii_dev);
return (0);
}
static int
rgephy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
int reg, speed, gig, anar;
switch (cmd) {
case MII_POLLSTAT:
break;
case MII_MEDIACHG:
/*
* If the interface is not up, don't do anything.
*/
if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
break;
PHY_RESET(sc); /* XXX hardware bug work-around */
anar = PHY_READ(sc, RGEPHY_MII_ANAR);
anar &= ~(RGEPHY_ANAR_PC | RGEPHY_ANAR_ASP |
RGEPHY_ANAR_TX_FD | RGEPHY_ANAR_TX |
RGEPHY_ANAR_10_FD | RGEPHY_ANAR_10);
switch (IFM_SUBTYPE(ife->ifm_media)) {
case IFM_AUTO:
#ifdef foo
/*
* If we're already in auto mode, just return.
*/
if (PHY_READ(sc, RGEPHY_MII_BMCR) & RGEPHY_BMCR_AUTOEN)
return (0);
#endif
(void)rgephy_mii_phy_auto(sc, ife->ifm_media);
break;
case IFM_1000_T:
speed = RGEPHY_S1000;
goto setit;
case IFM_100_TX:
speed = RGEPHY_S100;
anar |= RGEPHY_ANAR_TX_FD | RGEPHY_ANAR_TX;
goto setit;
case IFM_10_T:
speed = RGEPHY_S10;
anar |= RGEPHY_ANAR_10_FD | RGEPHY_ANAR_10;
setit:
if ((ife->ifm_media & IFM_FLOW) != 0 &&
(mii->mii_media.ifm_media & IFM_FLAG0) != 0)
return (EINVAL);
if ((ife->ifm_media & IFM_FDX) != 0) {
speed |= RGEPHY_BMCR_FDX;
gig = RGEPHY_1000CTL_AFD;
anar &= ~(RGEPHY_ANAR_TX | RGEPHY_ANAR_10);
if ((ife->ifm_media & IFM_FLOW) != 0 ||
(sc->mii_flags & MIIF_FORCEPAUSE) != 0)
anar |=
RGEPHY_ANAR_PC | RGEPHY_ANAR_ASP;
} else {
gig = RGEPHY_1000CTL_AHD;
anar &=
~(RGEPHY_ANAR_TX_FD | RGEPHY_ANAR_10_FD);
}
if (IFM_SUBTYPE(ife->ifm_media) == IFM_1000_T) {
gig |= RGEPHY_1000CTL_MSE;
if ((ife->ifm_media & IFM_ETH_MASTER) != 0)
gig |= RGEPHY_1000CTL_MSC;
} else {
gig = 0;
anar &= ~RGEPHY_ANAR_ASP;
}
if ((mii->mii_media.ifm_media & IFM_FLAG0) == 0)
speed |=
RGEPHY_BMCR_AUTOEN | RGEPHY_BMCR_STARTNEG;
rgephy_loop(sc);
PHY_WRITE(sc, RGEPHY_MII_1000CTL, gig);
PHY_WRITE(sc, RGEPHY_MII_ANAR, anar);
PHY_WRITE(sc, RGEPHY_MII_BMCR, speed);
break;
case IFM_NONE:
PHY_WRITE(sc, MII_BMCR, BMCR_ISO | BMCR_PDOWN);
break;
default:
return (EINVAL);
}
break;
case MII_TICK:
/*
* Is the interface even up?
*/
if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
return (0);
/*
* Only used for autonegotiation.
*/
if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
sc->mii_ticks = 0;
break;
}
/*
* Check to see if we have link. If we do, we don't
* need to restart the autonegotiation process.
*/
if ((sc->mii_flags & MIIF_PHYPRIV0) == 0 &&
sc->mii_mpd_rev >= 2) {
/* RTL8211B(L) */
reg = PHY_READ(sc, RGEPHY_MII_SSR);
if (reg & RGEPHY_SSR_LINK) {
sc->mii_ticks = 0;
break;
}
} else {
reg = PHY_READ(sc, RL_GMEDIASTAT);
if (reg & RL_GMEDIASTAT_LINK) {
sc->mii_ticks = 0;
break;
}
}
/* Announce link loss right after it happens. */
if (sc->mii_ticks++ == 0)
break;
/* Only retry autonegotiation every mii_anegticks seconds. */
if (sc->mii_ticks <= sc->mii_anegticks)
return (0);
sc->mii_ticks = 0;
rgephy_mii_phy_auto(sc, ife->ifm_media);
break;
}
/* Update the media status. */
PHY_STATUS(sc);
/*
* Callback if something changed. Note that we need to poke
* the DSP on the RealTek PHYs if the media changes.
*
*/
if (sc->mii_media_active != mii->mii_media_active ||
sc->mii_media_status != mii->mii_media_status ||
cmd == MII_MEDIACHG) {
rgephy_load_dspcode(sc);
}
mii_phy_update(sc, cmd);
return (0);
}
static void
rgephy_status(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
int bmsr, bmcr;
uint16_t ssr;
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
if ((sc->mii_flags & MIIF_PHYPRIV0) == 0 && sc->mii_mpd_rev >= 2) {
ssr = PHY_READ(sc, RGEPHY_MII_SSR);
if (ssr & RGEPHY_SSR_LINK)
mii->mii_media_status |= IFM_ACTIVE;
} else {
bmsr = PHY_READ(sc, RL_GMEDIASTAT);
if (bmsr & RL_GMEDIASTAT_LINK)
mii->mii_media_status |= IFM_ACTIVE;
}
bmsr = PHY_READ(sc, RGEPHY_MII_BMSR);
bmcr = PHY_READ(sc, RGEPHY_MII_BMCR);
if (bmcr & RGEPHY_BMCR_ISO) {
mii->mii_media_active |= IFM_NONE;
mii->mii_media_status = 0;
return;
}
if (bmcr & RGEPHY_BMCR_LOOP)
mii->mii_media_active |= IFM_LOOP;
if (bmcr & RGEPHY_BMCR_AUTOEN) {
if ((bmsr & RGEPHY_BMSR_ACOMP) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
}
if ((sc->mii_flags & MIIF_PHYPRIV0) == 0 && sc->mii_mpd_rev >= 2) {
ssr = PHY_READ(sc, RGEPHY_MII_SSR);
switch (ssr & RGEPHY_SSR_SPD_MASK) {
case RGEPHY_SSR_S1000:
mii->mii_media_active |= IFM_1000_T;
break;
case RGEPHY_SSR_S100:
mii->mii_media_active |= IFM_100_TX;
break;
case RGEPHY_SSR_S10:
mii->mii_media_active |= IFM_10_T;
break;
default:
mii->mii_media_active |= IFM_NONE;
break;
}
if (ssr & RGEPHY_SSR_FDX)
mii->mii_media_active |= IFM_FDX;
else
mii->mii_media_active |= IFM_HDX;
} else {
bmsr = PHY_READ(sc, RL_GMEDIASTAT);
if (bmsr & RL_GMEDIASTAT_1000MBPS)
mii->mii_media_active |= IFM_1000_T;
else if (bmsr & RL_GMEDIASTAT_100MBPS)
mii->mii_media_active |= IFM_100_TX;
else if (bmsr & RL_GMEDIASTAT_10MBPS)
mii->mii_media_active |= IFM_10_T;
else
mii->mii_media_active |= IFM_NONE;
if (bmsr & RL_GMEDIASTAT_FDX)
mii->mii_media_active |= IFM_FDX;
else
mii->mii_media_active |= IFM_HDX;
}
if ((mii->mii_media_active & IFM_FDX) != 0)
mii->mii_media_active |= mii_phy_flowstatus(sc);
if ((IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_T) &&
(PHY_READ(sc, RGEPHY_MII_1000STS) & RGEPHY_1000STS_MSR) != 0)
mii->mii_media_active |= IFM_ETH_MASTER;
}
static int
rgephy_mii_phy_auto(struct mii_softc *sc, int media)
{
int anar;
rgephy_loop(sc);
PHY_RESET(sc);
anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA;
if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0)
anar |= RGEPHY_ANAR_PC | RGEPHY_ANAR_ASP;
PHY_WRITE(sc, RGEPHY_MII_ANAR, anar);
DELAY(1000);
PHY_WRITE(sc, RGEPHY_MII_1000CTL,
RGEPHY_1000CTL_AHD | RGEPHY_1000CTL_AFD);
DELAY(1000);
PHY_WRITE(sc, RGEPHY_MII_BMCR,
RGEPHY_BMCR_AUTOEN | RGEPHY_BMCR_STARTNEG);
DELAY(100);
return (EJUSTRETURN);
}
static void
rgephy_loop(struct mii_softc *sc)
{
int i;
if (sc->mii_mpd_rev < 2) {
PHY_WRITE(sc, RGEPHY_MII_BMCR, RGEPHY_BMCR_PDOWN);
DELAY(1000);
}
for (i = 0; i < 15000; i++) {
if (!(PHY_READ(sc, RGEPHY_MII_BMSR) & RGEPHY_BMSR_LINK)) {
#if 0
device_printf(sc->mii_dev, "looped %d\n", i);
#endif
break;
}
DELAY(10);
}
}
#define PHY_SETBIT(x, y, z) \
PHY_WRITE(x, y, (PHY_READ(x, y) | (z)))
#define PHY_CLRBIT(x, y, z) \
PHY_WRITE(x, y, (PHY_READ(x, y) & ~(z)))
/*
* Initialize RealTek PHY per the datasheet. The DSP in the PHYs of
* existing revisions of the 8169S/8110S chips need to be tuned in
* order to reliably negotiate a 1000Mbps link. This is only needed
* for rev 0 and rev 1 of the PHY. Later versions work without
* any fixups.
*/
static void
rgephy_load_dspcode(struct mii_softc *sc)
{
int val;
if (sc->mii_mpd_rev >= 2)
return;
PHY_WRITE(sc, 31, 0x0001);
PHY_WRITE(sc, 21, 0x1000);
PHY_WRITE(sc, 24, 0x65C7);
PHY_CLRBIT(sc, 4, 0x0800);
val = PHY_READ(sc, 4) & 0xFFF;
PHY_WRITE(sc, 4, val);
PHY_WRITE(sc, 3, 0x00A1);
PHY_WRITE(sc, 2, 0x0008);
PHY_WRITE(sc, 1, 0x1020);
PHY_WRITE(sc, 0, 0x1000);
PHY_SETBIT(sc, 4, 0x0800);
PHY_CLRBIT(sc, 4, 0x0800);
val = (PHY_READ(sc, 4) & 0xFFF) | 0x7000;
PHY_WRITE(sc, 4, val);
PHY_WRITE(sc, 3, 0xFF41);
PHY_WRITE(sc, 2, 0xDE60);
PHY_WRITE(sc, 1, 0x0140);
PHY_WRITE(sc, 0, 0x0077);
val = (PHY_READ(sc, 4) & 0xFFF) | 0xA000;
PHY_WRITE(sc, 4, val);
PHY_WRITE(sc, 3, 0xDF01);
PHY_WRITE(sc, 2, 0xDF20);
PHY_WRITE(sc, 1, 0xFF95);
PHY_WRITE(sc, 0, 0xFA00);
val = (PHY_READ(sc, 4) & 0xFFF) | 0xB000;
PHY_WRITE(sc, 4, val);
PHY_WRITE(sc, 3, 0xFF41);
PHY_WRITE(sc, 2, 0xDE20);
PHY_WRITE(sc, 1, 0x0140);
PHY_WRITE(sc, 0, 0x00BB);
val = (PHY_READ(sc, 4) & 0xFFF) | 0xF000;
PHY_WRITE(sc, 4, val);
PHY_WRITE(sc, 3, 0xDF01);
PHY_WRITE(sc, 2, 0xDF20);
PHY_WRITE(sc, 1, 0xFF95);
PHY_WRITE(sc, 0, 0xBF00);
PHY_SETBIT(sc, 4, 0x0800);
PHY_CLRBIT(sc, 4, 0x0800);
PHY_WRITE(sc, 31, 0x0000);
DELAY(40);
}
static void
rgephy_reset(struct mii_softc *sc)
{
uint16_t ssr;
if ((sc->mii_flags & MIIF_PHYPRIV0) == 0 && sc->mii_mpd_rev == 3) {
/* RTL8211C(L) */
ssr = PHY_READ(sc, RGEPHY_MII_SSR);
if ((ssr & RGEPHY_SSR_ALDPS) != 0) {
ssr &= ~RGEPHY_SSR_ALDPS;
PHY_WRITE(sc, RGEPHY_MII_SSR, ssr);
}
}
mii_phy_reset(sc);
DELAY(1000);
rgephy_load_dspcode(sc);
}
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