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freebsd-dev/sys/dev/mii/amphy.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

237 lines
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/*-
* Copyright (c) 1997, 1998, 1999
* Bill Paul <wpaul@ee.columbia.edu>. 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 AMD AM79c873 PHYs
* This driver also works for Davicom DM910{1,2} PHYs, which appear
* to be AM79c873 workalikes.
*/
#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/amphyreg.h>
#include "miibus_if.h"
static int amphy_probe(device_t);
static int amphy_attach(device_t);
static device_method_t amphy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, amphy_probe),
DEVMETHOD(device_attach, amphy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
{ 0, 0 }
};
static devclass_t amphy_devclass;
static driver_t amphy_driver = {
"amphy",
amphy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0);
static int amphy_service(struct mii_softc *, struct mii_data *, int);
static void amphy_status(struct mii_softc *);
static const struct mii_phydesc amphys[] = {
MII_PHY_DESC(DAVICOM, DM9102),
MII_PHY_DESC(xxAMD, 79C873),
MII_PHY_DESC(xxDAVICOM, DM9101),
MII_PHY_END
};
static int
amphy_probe(device_t dev)
{
return (mii_phy_dev_probe(dev, amphys, BUS_PROBE_DEFAULT));
}
static int
amphy_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 = amphy_service;
sc->mii_pdata = mii;
#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
#if 0
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
MII_MEDIA_100_TX);
#endif
mii_phy_reset(sc);
sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
device_printf(dev, " ");
mii_phy_add_media(sc);
printf("\n");
#undef ADD
MIIBUS_MEDIAINIT(sc->mii_dev);
return (0);
}
static int
amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
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;
mii_phy_setmedia(sc);
break;
case MII_TICK:
if (mii_phy_tick(sc) == EJUSTRETURN)
return (0);
break;
}
/* Update the media status. */
amphy_status(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
static void
amphy_status(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
int bmsr, bmcr, par, anlpar;
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, MII_BMCR);
if (bmcr & BMCR_ISO) {
mii->mii_media_active |= IFM_NONE;
mii->mii_media_status = 0;
return;
}
if (bmcr & BMCR_LOOP)
mii->mii_media_active |= IFM_LOOP;
if (bmcr & BMCR_AUTOEN) {
/*
* The PAR status bits are only valid if autonegotiation
* has completed (or it's disabled).
*/
if ((bmsr & BMSR_ACOMP) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
anlpar = PHY_READ(sc, MII_ANAR) &
PHY_READ(sc, MII_ANLPAR);
if (anlpar & ANLPAR_TX_FD)
mii->mii_media_active |= IFM_100_TX|IFM_FDX;
else if (anlpar & ANLPAR_T4)
mii->mii_media_active |= IFM_100_T4|IFM_HDX;
else if (anlpar & ANLPAR_TX)
mii->mii_media_active |= IFM_100_TX|IFM_HDX;
else if (anlpar & ANLPAR_10_FD)
mii->mii_media_active |= IFM_10_T|IFM_FDX;
else if (anlpar & ANLPAR_10)
mii->mii_media_active |= IFM_10_T|IFM_HDX;
else
mii->mii_media_active |= IFM_NONE;
return;
}
/*
* Link partner is not capable of autonegotiation.
*/
par = PHY_READ(sc, MII_AMPHY_DSCSR);
if (par & DSCSR_100FDX)
mii->mii_media_active |= IFM_100_TX|IFM_FDX;
else if (par & DSCSR_100HDX)
mii->mii_media_active |= IFM_100_TX|IFM_HDX;
else if (par & DSCSR_10FDX)
mii->mii_media_active |= IFM_10_T|IFM_HDX;
else if (par & DSCSR_10HDX)
mii->mii_media_active |= IFM_10_T|IFM_HDX;
} else
mii->mii_media_active = ife->ifm_media;
}
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