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freebsd-dev/sys/dev/mii/ciphy.c
Marius Strobl 8e5d93dbb4 Convert the PHY drivers to honor the mii_flags passed down and convert 
the NIC drivers as well as the PHY drivers to take advantage of the
mii_attach() introduced in r213878 to get rid of certain hacks. For
the most part these were:
- Artificially limiting miibus_{read,write}reg methods to certain PHY
  addresses; we now let mii_attach() only probe the PHY at the desired
  address(es) instead.
- PHY drivers setting MIIF_* flags based on the NIC driver they hang
  off from, partly even based on grabbing and using the softc of the
  parent; we now pass these flags down from the NIC to the PHY drivers
  via mii_attach(). This got us rid of all such hacks except those of
  brgphy() in combination with bce(4) and bge(4), which is way beyond
  what can be expressed with simple flags.

While at it, I took the opportunity to change the NIC drivers to pass
up the error returned by mii_attach() (previously by mii_phy_probe())
and unify the error message used in this case where and as appropriate
as mii_attach() actually can fail for a number of reasons, not just
because of no PHY(s) being present at the expected address(es).

Reviewed by:	jhb, yongari
2010-10-15 14:52:11 +00:00

412 lines
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/*-
* Copyright (c) 2004
* 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 Cicada/Vitesse CS/VSC8xxx 10/100/1000 copper 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/ciphyreg.h>
#include "miibus_if.h"
#include <machine/bus.h>
static int ciphy_probe(device_t);
static int ciphy_attach(device_t);
static device_method_t ciphy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, ciphy_probe),
DEVMETHOD(device_attach, ciphy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
{ 0, 0 }
};
static devclass_t ciphy_devclass;
static driver_t ciphy_driver = {
"ciphy",
ciphy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(ciphy, miibus, ciphy_driver, ciphy_devclass, 0, 0);
static int ciphy_service(struct mii_softc *, struct mii_data *, int);
static void ciphy_status(struct mii_softc *);
static void ciphy_reset(struct mii_softc *);
static void ciphy_fixup(struct mii_softc *);
static const struct mii_phydesc ciphys[] = {
MII_PHY_DESC(CICADA, CS8201),
MII_PHY_DESC(CICADA, CS8201A),
MII_PHY_DESC(CICADA, CS8201B),
MII_PHY_DESC(CICADA, CS8204),
MII_PHY_DESC(CICADA, VSC8211),
MII_PHY_DESC(CICADA, CS8244),
MII_PHY_DESC(VITESSE, VSC8601),
MII_PHY_END
};
static int
ciphy_probe(device_t dev)
{
return (mii_phy_dev_probe(dev, ciphys, BUS_PROBE_DEFAULT));
}
static int
ciphy_attach(device_t dev)
{
struct mii_softc *sc;
struct mii_attach_args *ma;
struct mii_data *mii;
sc = device_get_softc(dev);
ma = device_get_ivars(dev);
sc->mii_dev = device_get_parent(dev);
mii = ma->mii_data;
LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
sc->mii_flags = miibus_get_flags(dev);
sc->mii_inst = mii->mii_instance++;
sc->mii_phy = ma->mii_phyno;
sc->mii_service = ciphy_service;
sc->mii_pdata = mii;
sc->mii_flags |= MIIF_NOISOLATE;
ciphy_reset(sc);
sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->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");
MIIBUS_MEDIAINIT(sc->mii_dev);
return (0);
}
static int
ciphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
int reg, speed, gig;
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;
ciphy_fixup(sc); /* XXX hardware bug work-around */
switch (IFM_SUBTYPE(ife->ifm_media)) {
case IFM_AUTO:
#ifdef foo
/*
* If we're already in auto mode, just return.
*/
if (PHY_READ(sc, CIPHY_MII_BMCR) & CIPHY_BMCR_AUTOEN)
return (0);
#endif
(void) mii_phy_auto(sc);
break;
case IFM_1000_T:
speed = CIPHY_S1000;
goto setit;
case IFM_100_TX:
speed = CIPHY_S100;
goto setit;
case IFM_10_T:
speed = CIPHY_S10;
setit:
if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
speed |= CIPHY_BMCR_FDX;
gig = CIPHY_1000CTL_AFD;
} else {
gig = CIPHY_1000CTL_AHD;
}
PHY_WRITE(sc, CIPHY_MII_1000CTL, 0);
PHY_WRITE(sc, CIPHY_MII_BMCR, speed);
PHY_WRITE(sc, CIPHY_MII_ANAR, CIPHY_SEL_TYPE);
if (IFM_SUBTYPE(ife->ifm_media) != IFM_1000_T)
break;
PHY_WRITE(sc, CIPHY_MII_1000CTL, gig);
PHY_WRITE(sc, CIPHY_MII_BMCR,
speed|CIPHY_BMCR_AUTOEN|CIPHY_BMCR_STARTNEG);
/*
* 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, CIPHY_MII_1000CTL,
gig|CIPHY_1000CTL_MSE|CIPHY_1000CTL_MSC);
} else {
PHY_WRITE(sc, CIPHY_MII_1000CTL,
gig|CIPHY_1000CTL_MSE);
}
break;
case IFM_NONE:
PHY_WRITE(sc, MII_BMCR, BMCR_ISO|BMCR_PDOWN);
break;
case IFM_100_T4:
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)
break;
/*
* Check to see if we have link. If we do, we don't
* need to restart the autonegotiation process. Read
* the BMSR twice in case it's latched.
*/
reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
if (reg & BMSR_LINK)
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)
break;
sc->mii_ticks = 0;
mii_phy_auto(sc);
break;
}
/* Update the media status. */
ciphy_status(sc);
/*
* Callback if something changed. Note that we need to poke
* apply fixups for certain PHY revs.
*/
if (sc->mii_media_active != mii->mii_media_active ||
sc->mii_media_status != mii->mii_media_status ||
cmd == MII_MEDIACHG) {
ciphy_fixup(sc);
}
mii_phy_update(sc, cmd);
return (0);
}
static void
ciphy_status(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
int bmsr, bmcr;
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
if (bmsr & BMSR_LINK)
mii->mii_media_status |= IFM_ACTIVE;
bmcr = PHY_READ(sc, CIPHY_MII_BMCR);
if (bmcr & CIPHY_BMCR_LOOP)
mii->mii_media_active |= IFM_LOOP;
if (bmcr & CIPHY_BMCR_AUTOEN) {
if ((bmsr & CIPHY_BMSR_ACOMP) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
}
bmsr = PHY_READ(sc, CIPHY_MII_AUXCSR);
switch (bmsr & CIPHY_AUXCSR_SPEED) {
case CIPHY_SPEED10:
mii->mii_media_active |= IFM_10_T;
break;
case CIPHY_SPEED100:
mii->mii_media_active |= IFM_100_TX;
break;
case CIPHY_SPEED1000:
mii->mii_media_active |= IFM_1000_T;
break;
default:
device_printf(sc->mii_dev, "unknown PHY speed %x\n",
bmsr & CIPHY_AUXCSR_SPEED);
break;
}
if (bmsr & CIPHY_AUXCSR_FDX)
mii->mii_media_active |= IFM_FDX;
else
mii->mii_media_active |= IFM_HDX;
}
static void
ciphy_reset(struct mii_softc *sc)
{
mii_phy_reset(sc);
DELAY(1000);
}
#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)))
static void
ciphy_fixup(struct mii_softc *sc)
{
uint16_t model;
uint16_t status, speed;
uint16_t val;
model = MII_MODEL(PHY_READ(sc, CIPHY_MII_PHYIDR2));
status = PHY_READ(sc, CIPHY_MII_AUXCSR);
speed = status & CIPHY_AUXCSR_SPEED;
if (strcmp(device_get_name(device_get_parent(sc->mii_dev)),
"nfe") == 0) {
/* need to set for 2.5V RGMII for NVIDIA adapters */
val = PHY_READ(sc, CIPHY_MII_ECTL1);
val &= ~(CIPHY_ECTL1_IOVOL | CIPHY_ECTL1_INTSEL);
val |= (CIPHY_IOVOL_2500MV | CIPHY_INTSEL_RGMII);
PHY_WRITE(sc, CIPHY_MII_ECTL1, val);
/* From Linux. */
val = PHY_READ(sc, CIPHY_MII_AUXCSR);
val |= CIPHY_AUXCSR_MDPPS;
PHY_WRITE(sc, CIPHY_MII_AUXCSR, val);
val = PHY_READ(sc, CIPHY_MII_10BTCSR);
val |= CIPHY_10BTCSR_ECHO;
PHY_WRITE(sc, CIPHY_MII_10BTCSR, val);
}
switch (model) {
case MII_MODEL_CICADA_CS8204:
case MII_MODEL_CICADA_CS8201:
/* Turn off "aux mode" (whatever that means) */
PHY_SETBIT(sc, CIPHY_MII_AUXCSR, CIPHY_AUXCSR_MDPPS);
/*
* Work around speed polling bug in VT3119/VT3216
* when using MII in full duplex mode.
*/
if ((speed == CIPHY_SPEED10 || speed == CIPHY_SPEED100) &&
(status & CIPHY_AUXCSR_FDX)) {
PHY_SETBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
} else {
PHY_CLRBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
}
/* Enable link/activity LED blink. */
PHY_SETBIT(sc, CIPHY_MII_LED, CIPHY_LED_LINKACTBLINK);
break;
case MII_MODEL_CICADA_CS8201A:
case MII_MODEL_CICADA_CS8201B:
/*
* Work around speed polling bug in VT3119/VT3216
* when using MII in full duplex mode.
*/
if ((speed == CIPHY_SPEED10 || speed == CIPHY_SPEED100) &&
(status & CIPHY_AUXCSR_FDX)) {
PHY_SETBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
} else {
PHY_CLRBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
}
break;
case MII_MODEL_CICADA_VSC8211:
case MII_MODEL_CICADA_CS8244:
case MII_MODEL_VITESSE_VSC8601:
break;
default:
device_printf(sc->mii_dev, "unknown CICADA PHY model %x\n",
model);
break;
}
}
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