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freebsd-dev/sys/dev/dc/pnphy.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

242 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("$FreeBSD$");
/*
* Pseudo-driver for media selection on the Lite-On PNIC 82c168
* chip. The NWAY support on this chip is horribly broken, so we
* only support manual mode selection. This is lame, but getting
* NWAY to work right is amazingly difficult.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.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 <machine/bus.h>
#include <machine/resource.h>
#include <sys/bus.h>
#include <dev/dc/if_dcreg.h>
#include "miibus_if.h"
#define DC_SETBIT(sc, reg, x) \
CSR_WRITE_4(sc, reg, \
CSR_READ_4(sc, reg) | x)
#define DC_CLRBIT(sc, reg, x) \
CSR_WRITE_4(sc, reg, \
CSR_READ_4(sc, reg) & ~x)
static int pnphy_probe(device_t);
static int pnphy_attach(device_t);
static device_method_t pnphy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, pnphy_probe),
DEVMETHOD(device_attach, pnphy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
{ 0, 0 }
};
static devclass_t pnphy_devclass;
static driver_t pnphy_driver = {
"pnphy",
pnphy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(pnphy, miibus, pnphy_driver, pnphy_devclass, 0, 0);
static int pnphy_service(struct mii_softc *, struct mii_data *, int);
static void pnphy_status(struct mii_softc *);
static int
pnphy_probe(device_t dev)
{
struct mii_attach_args *ma;
ma = device_get_ivars(dev);
/*
* The dc driver will report the 82c168 vendor and device
* ID to let us know that it wants us to attach.
*/
if (ma->mii_id1 != DC_VENDORID_LO ||
ma->mii_id2 != DC_DEVICEID_82C168)
return (ENXIO);
device_set_desc(dev, "PNIC 82c168 media interface");
return (BUS_PROBE_DEFAULT);
}
static int
pnphy_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 = pnphy_service;
sc->mii_pdata = mii;
/*
* Apparently, we can neither isolate nor do loopback.
*/
sc->mii_flags |= MIIF_NOISOLATE | MIIF_NOLOOP;
sc->mii_capabilities =
BMSR_100TXFDX | BMSR_100TXHDX | BMSR_10TFDX | BMSR_10THDX;
sc->mii_capabilities &= ma->mii_capmask;
device_printf(dev, " ");
mii_phy_add_media(sc);
printf("\n");
MIIBUS_MEDIAINIT(sc->mii_dev);
return (0);
}
static int
pnphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
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;
switch (IFM_SUBTYPE(ife->ifm_media)) {
case IFM_AUTO:
/* NWAY is busted on this chip */
case IFM_100_T4:
/*
* XXX Not supported as a manual setting right now.
*/
return (EINVAL);
case IFM_100_TX:
mii->mii_media_active = IFM_ETHER | IFM_100_TX;
if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
mii->mii_media_active |= IFM_FDX;
MIIBUS_STATCHG(sc->mii_dev);
return (0);
case IFM_10_T:
mii->mii_media_active = IFM_ETHER | IFM_10_T;
if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
mii->mii_media_active |= IFM_FDX;
MIIBUS_STATCHG(sc->mii_dev);
return (0);
default:
return (EINVAL);
}
break;
case MII_TICK:
/*
* Is the interface even up?
*/
if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
return (0);
break;
}
/* Update the media status. */
pnphy_status(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
static void
pnphy_status(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
int reg;
struct dc_softc *dc_sc;
dc_sc = mii->mii_ifp->if_softc;
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
reg = CSR_READ_4(dc_sc, DC_ISR);
if (!(reg & DC_ISR_LINKFAIL))
mii->mii_media_status |= IFM_ACTIVE;
if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SPEEDSEL)
mii->mii_media_active |= IFM_10_T;
else
mii->mii_media_active |= IFM_100_TX;
if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX)
mii->mii_media_active |= IFM_FDX;
else
mii->mii_media_active |= IFM_HDX;
}
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