freebsd-skq/sys/dev/mii/atphy.c
Marius Strobl 991ab941ee - Change these drivers to take advantage and use the generic IEEE 802.3
annex 31B full duplex flow control as well as the IFM_1000_T master
  support committed in r215297. For atphy(4) and jmphy(4) this includes
  changing these PHY drivers to no longer unconditionally advertise
  support for flow control but only if the selected media has IFM_FLOW
  set (or MIIF_FORCEPAUSE is set).
- Rename {atphy,jmphy}_auto() to {atphy,jmphy}_setmedia() as these handle
  other media types as well.

Reviewed by:	yongari (plus additional testing)
Obtained from:	NetBSD (partially), OpenBSD (partially)
MFC after:	2 weeks
2010-11-14 13:31:01 +00:00

402 lines
9.7 KiB
C

/*-
* Copyright (c) 2008, Pyun YongHyeon <yongari@FreeBSD.org>
* 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 unmodified, 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 THE AUTHOR OR CONTRIBUTORS 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 Attansic/Atheros F1 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_media.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include "miidevs.h"
#include <dev/mii/atphyreg.h>
#include "miibus_if.h"
static int atphy_probe(device_t);
static int atphy_attach(device_t);
struct atphy_softc {
struct mii_softc mii_sc;
int mii_oui;
int mii_model;
int mii_rev;
};
static device_method_t atphy_methods[] = {
/* Device interface. */
DEVMETHOD(device_probe, atphy_probe),
DEVMETHOD(device_attach, atphy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
{ NULL, NULL }
};
static devclass_t atphy_devclass;
static driver_t atphy_driver = {
"atphy",
atphy_methods,
sizeof(struct atphy_softc)
};
DRIVER_MODULE(atphy, miibus, atphy_driver, atphy_devclass, 0, 0);
static int atphy_service(struct mii_softc *, struct mii_data *, int);
static void atphy_status(struct mii_softc *);
static void atphy_reset(struct mii_softc *);
static uint16_t atphy_anar(struct ifmedia_entry *);
static int atphy_setmedia(struct mii_softc *, int);
static const struct mii_phydesc atphys[] = {
MII_PHY_DESC(ATHEROS, F1),
MII_PHY_DESC(ATHEROS, F1_7),
MII_PHY_DESC(ATHEROS, F2),
MII_PHY_END
};
static int
atphy_probe(device_t dev)
{
return (mii_phy_dev_probe(dev, atphys, BUS_PROBE_DEFAULT));
}
static int
atphy_attach(device_t dev)
{
struct atphy_softc *asc;
struct mii_softc *sc;
struct mii_attach_args *ma;
struct mii_data *mii;
asc = device_get_softc(dev);
sc = &asc->mii_sc;
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 = atphy_service;
sc->mii_pdata = mii;
asc->mii_oui = MII_OUI(ma->mii_id1, ma->mii_id2);
asc->mii_model = MII_MODEL(ma->mii_id2);
asc->mii_rev = MII_REV(ma->mii_id2);
if (bootverbose)
device_printf(dev, "OUI 0x%06x, model 0x%04x, rev. %d\n",
asc->mii_oui, asc->mii_model, asc->mii_rev);
atphy_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
atphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
uint16_t anar, bmcr, bmsr;
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;
if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO ||
IFM_SUBTYPE(ife->ifm_media) == IFM_1000_T) {
atphy_setmedia(sc, ife->ifm_media);
break;
}
bmcr = 0;
switch (IFM_SUBTYPE(ife->ifm_media)) {
case IFM_100_TX:
bmcr = BMCR_S100;
break;
case IFM_10_T:
bmcr = BMCR_S10;
break;
case IFM_NONE:
bmcr = PHY_READ(sc, MII_BMCR);
/*
* XXX
* Due to an unknown reason powering down PHY resulted
* in unexpected results such as inaccessibility of
* hardware of freshly rebooted system. Disable
* powering down PHY until I got more information for
* Attansic/Atheros PHY hardwares.
*/
PHY_WRITE(sc, MII_BMCR, bmcr | BMCR_ISO);
goto done;
default:
return (EINVAL);
}
anar = atphy_anar(ife);
if (((ife->ifm_media & IFM_GMASK) & IFM_FDX) != 0) {
bmcr |= BMCR_FDX;
if (((ife->ifm_media & IFM_GMASK) & IFM_FLOW) != 0 ||
(sc->mii_flags & MIIF_FORCEPAUSE) != 0)
anar |= ANAR_PAUSE_TOWARDS;
}
if ((sc->mii_extcapabilities & (EXTSR_1000TFDX |
EXTSR_1000THDX)) != 0)
PHY_WRITE(sc, MII_100T2CR, 0);
PHY_WRITE(sc, MII_ANAR, anar | ANAR_CSMA);
/*
* Reset the PHY so all changes take effect.
*/
PHY_WRITE(sc, MII_BMCR, bmcr | BMCR_RESET | BMCR_AUTOEN |
BMCR_STARTNEG);
done:
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 for link.
* Read the status register twice; BMSR_LINK is latch-low.
*/
bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
if (bmsr & BMSR_LINK) {
sc->mii_ticks = 0;
break;
}
/* Announce link loss right after it happens. */
if (sc->mii_ticks++ == 0)
break;
if (sc->mii_ticks <= sc->mii_anegticks)
return (0);
sc->mii_ticks = 0;
atphy_setmedia(sc, ife->ifm_media);
break;
}
/* Update the media status. */
atphy_status(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
static void
atphy_status(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
uint32_t bmsr, bmcr, ssr;
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) != 0)
mii->mii_media_status |= IFM_ACTIVE;
bmcr = PHY_READ(sc, MII_BMCR);
if ((bmcr & BMCR_ISO) != 0) {
mii->mii_media_active |= IFM_NONE;
mii->mii_media_status = 0;
return;
}
if ((bmcr & BMCR_LOOP) != 0)
mii->mii_media_active |= IFM_LOOP;
ssr = PHY_READ(sc, ATPHY_SSR);
if ((ssr & ATPHY_SSR_SPD_DPLX_RESOLVED) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
switch (ssr & ATPHY_SSR_SPEED_MASK) {
case ATPHY_SSR_1000MBS:
mii->mii_media_active |= IFM_1000_T;
/*
* atphy(4) has a valid link so reset mii_ticks.
* Resetting mii_ticks is needed in order to
* detect link loss after auto-negotiation.
*/
sc->mii_ticks = 0;
break;
case ATPHY_SSR_100MBS:
mii->mii_media_active |= IFM_100_TX;
sc->mii_ticks = 0;
break;
case ATPHY_SSR_10MBS:
mii->mii_media_active |= IFM_10_T;
sc->mii_ticks = 0;
break;
default:
mii->mii_media_active |= IFM_NONE;
return;
}
if ((ssr & ATPHY_SSR_DUPLEX) != 0)
mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc);
else
mii->mii_media_active |= IFM_HDX;
if ((IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_T) &&
(PHY_READ(sc, MII_100T2SR) & GTSR_MS_RES) != 0)
mii->mii_media_active |= IFM_ETH_MASTER;
}
static void
atphy_reset(struct mii_softc *sc)
{
struct atphy_softc *asc;
uint32_t reg;
int i;
asc = (struct atphy_softc *)sc;
/* Take PHY out of power down mode. */
PHY_WRITE(sc, 29, 0x29);
PHY_WRITE(sc, 30, 0);
reg = PHY_READ(sc, ATPHY_SCR);
/* Enable automatic crossover. */
reg |= ATPHY_SCR_AUTO_X_MODE;
/* Disable power down. */
reg &= ~ATPHY_SCR_MAC_PDOWN;
/* Enable CRS on Tx. */
reg |= ATPHY_SCR_ASSERT_CRS_ON_TX;
/* Auto correction for reversed cable polarity. */
reg |= ATPHY_SCR_POLARITY_REVERSAL;
PHY_WRITE(sc, ATPHY_SCR, reg);
/* Workaround F1 bug to reset phy. */
atphy_setmedia(sc, sc->mii_pdata->mii_media.ifm_cur->ifm_media);
for (i = 0; i < 1000; i++) {
DELAY(1);
if ((PHY_READ(sc, MII_BMCR) & BMCR_RESET) == 0)
break;
}
}
static uint16_t
atphy_anar(struct ifmedia_entry *ife)
{
uint16_t anar;
anar = 0;
switch (IFM_SUBTYPE(ife->ifm_media)) {
case IFM_AUTO:
anar |= ANAR_TX_FD | ANAR_TX | ANAR_10_FD | ANAR_10;
return (anar);
case IFM_1000_T:
return (anar);
case IFM_100_TX:
anar |= ANAR_TX;
break;
case IFM_10_T:
anar |= ANAR_10;
break;
default:
return (0);
}
if (((ife->ifm_media & IFM_GMASK) & IFM_FDX) != 0) {
if (IFM_SUBTYPE(ife->ifm_media) == IFM_100_TX)
anar |= ANAR_TX_FD;
else
anar |= ANAR_10_FD;
}
return (anar);
}
static int
atphy_setmedia(struct mii_softc *sc, int media)
{
uint16_t anar;
anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA;
if (((IFM_SUBTYPE(media) == IFM_AUTO ||
((media & IFM_GMASK) & IFM_FDX) != 0) &&
((media & IFM_GMASK) & IFM_FLOW) != 0) ||
(sc->mii_flags & MIIF_FORCEPAUSE) != 0)
anar |= ANAR_PAUSE_TOWARDS;
PHY_WRITE(sc, MII_ANAR, anar);
if ((sc->mii_extcapabilities & (EXTSR_1000TFDX | EXTSR_1000THDX)) != 0)
PHY_WRITE(sc, MII_100T2CR, GTCR_ADV_1000TFDX |
GTCR_ADV_1000THDX);
PHY_WRITE(sc, MII_BMCR, BMCR_RESET | BMCR_AUTOEN | BMCR_STARTNEG);
return (EJUSTRETURN);
}