freebsd-dev/sys/dev/mii/mxphy.c

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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.
*
* $FreeBSD$
*/
/*
* Pseudo-driver for internal NWAY support on Macronix 98713/98715/98725
* PMAC controller chips. The Macronix chips use the same internal
* NWAY register layout as the DEC/Intel 21143. Technically we're
* abusing the miibus code to handle the media selection and NWAY
* support here since there is no MII interface. However the logical
* operations are roughly the same, and the alternative is to create
* a fake MII interface in the driver, which is harder to do.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/module.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 <dev/mii/miidevs.h>
#include <machine/clock.h>
#include <machine/bus_pio.h>
#include <machine/bus_memio.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/bus.h>
#include <pci/if_mxreg.h>
#include "miibus_if.h"
#if !defined(lint)
static const char rcsid[] =
"$FreeBSD$";
#endif
#define MX_SETBIT(sc, reg, x) \
CSR_WRITE_4(sc, reg, \
CSR_READ_4(sc, reg) | x)
#define MX_CLRBIT(sc, reg, x) \
CSR_WRITE_4(sc, reg, \
CSR_READ_4(sc, reg) & ~x)
#define MIIF_AUTOTIMEOUT 0x0004
static int mxphy_probe __P((device_t));
static int mxphy_attach __P((device_t));
static int mxphy_detach __P((device_t));
static device_method_t mxphy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, mxphy_probe),
DEVMETHOD(device_attach, mxphy_attach),
DEVMETHOD(device_detach, mxphy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
{ 0, 0 }
};
static devclass_t mxphy_devclass;
static driver_t mxphy_driver = {
"mxphy",
mxphy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(mxphy, miibus, mxphy_driver, mxphy_devclass, 0, 0);
int mxphy_service __P((struct mii_softc *, struct mii_data *, int));
void mxphy_status __P((struct mii_softc *));
static int mxphy_auto __P((struct mii_softc *, int));
static void mxphy_reset __P((struct mii_softc *));
static int mxphy_probe(dev)
device_t dev;
{
struct mii_attach_args *ma;
ma = device_get_ivars(dev);
/*
* The mx driver will report a Macronix vendor and device
* ID to let us know that it wants us to attach.
*/
if (ma->mii_id1 != MX_VENDORID ||
ma->mii_id2 != MX_DEVICEID_987x5)
return(ENXIO);
device_set_desc(dev, "Macronix NWAY media interface");
return (0);
}
static int mxphy_attach(dev)
device_t dev;
{
struct mii_softc *sc;
struct mii_attach_args *ma;
struct mii_data *mii;
struct mx_softc *mx_sc;
sc = device_get_softc(dev);
ma = device_get_ivars(dev);
sc->mii_dev = device_get_parent(dev);
mii = device_get_softc(sc->mii_dev);
LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
sc->mii_inst = mii->mii_instance;
sc->mii_phy = ma->mii_phyno;
sc->mii_service = mxphy_service;
sc->mii_pdata = mii;
sc->mii_flags |= MIIF_NOISOLATE;
mii->mii_instance++;
#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
BMCR_ISO);
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
BMCR_LOOP|BMCR_S100);
/*mxphy_reset(sc);*/
mx_sc = mii->mii_ifp->if_softc;
CSR_WRITE_4(mx_sc, MX_10BTSTAT, 0);
CSR_WRITE_4(mx_sc, MX_10BTCTRL, 0);
sc->mii_capabilities =
BMSR_ANEG|BMSR_100TXFDX|BMSR_100TXHDX|BMSR_10TFDX|BMSR_10THDX;
sc->mii_capabilities &= ma->mii_capmask;
device_printf(dev, " ");
if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
printf("no media present");
else
mii_add_media(mii, sc->mii_capabilities, sc->mii_inst);
printf("\n");
#undef ADD
MIIBUS_MEDIAINIT(sc->mii_dev);
return(0);
}
static int mxphy_detach(dev)
device_t dev;
{
struct mii_softc *sc;
struct mii_data *mii;
sc = device_get_softc(dev);
mii = device_get_softc(device_get_parent(dev));
sc->mii_dev = NULL;
LIST_REMOVE(sc, mii_list);
return(0);
}
int
mxphy_service(sc, mii, cmd)
struct mii_softc *sc;
struct mii_data *mii;
int cmd;
{
struct mx_softc *mx_sc;
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
int reg;
u_int32_t mode;
mx_sc = mii->mii_ifp->if_softc;
switch (cmd) {
case MII_POLLSTAT:
/*
* If we're not polling our PHY instance, just return.
*/
if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
return (0);
}
break;
case MII_MEDIACHG:
/*
* If the media indicates a different PHY instance,
* isolate ourselves.
*/
if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
return (0);
}
/*
* If the interface is not up, don't do anything.
*/
if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
break;
sc->mii_flags = 0;
mii->mii_media_active = IFM_NONE;
mode = CSR_READ_4(mx_sc, MX_NETCFG);
mode &= ~(MX_NETCFG_FULLDUPLEX|MX_NETCFG_PORTSEL|
MX_NETCFG_PCS|MX_NETCFG_SCRAMBLER|MX_NETCFG_SPEEDSEL);
switch (IFM_SUBTYPE(ife->ifm_media)) {
case IFM_AUTO:
mxphy_reset(sc);
(void) mxphy_auto(sc, 0);
break;
case IFM_100_T4:
/*
* XXX Not supported as a manual setting right now.
*/
return (EINVAL);
case IFM_100_TX:
mxphy_reset(sc);
MX_CLRBIT(mx_sc, MX_10BTCTRL, MX_TCTL_AUTONEGENBL);
mode |= MX_NETCFG_PORTSEL|MX_NETCFG_PCS|
MX_NETCFG_SCRAMBLER;
if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
mode |= MX_NETCFG_FULLDUPLEX;
else
mode &= ~MX_NETCFG_FULLDUPLEX;
CSR_WRITE_4(mx_sc, MX_NETCFG, mode);
break;
case IFM_10_T:
mxphy_reset(sc);
MX_CLRBIT(mx_sc, MX_10BTCTRL, MX_TCTL_AUTONEGENBL);
mode &= ~MX_NETCFG_PORTSEL;
mode |= MX_NETCFG_SPEEDSEL;
if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
mode |= MX_NETCFG_FULLDUPLEX;
else
mode &= ~MX_NETCFG_FULLDUPLEX;
CSR_WRITE_4(mx_sc, MX_NETCFG, mode);
break;
default:
return(EINVAL);
break;
}
break;
case MII_TICK:
/*
* If we're not currently selected, just return.
*/
if (IFM_INST(ife->ifm_media) != sc->mii_inst)
return (0);
/*
* Only used for autonegotiation.
*/
if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
return (0);
/*
* Is the interface even up?
*/
if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
return (0);
if (sc->mii_flags & MIIF_DOINGAUTO) {
if (++sc->mii_ticks != 5)
return(0);
else {
sc->mii_ticks = 0;
sc->mii_flags &= ~MIIF_DOINGAUTO;
sc->mii_flags |= MIIF_AUTOTIMEOUT;
}
}
sc->mii_flags &= ~MIIF_DOINGAUTO;
/*
* 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 = CSR_READ_4(mx_sc, MX_10BTSTAT) &
(MX_TSTAT_LS10|MX_TSTAT_LS100);
if (IFM_SUBTYPE(mii->mii_media_active) == IFM_100_TX &&
!(reg & MX_TSTAT_LS100)) {
if (sc->mii_flags & MIIF_AUTOTIMEOUT) {
sc->mii_flags &= ~MIIF_AUTOTIMEOUT;
break;
} else
return(0);
} else if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T &&
!(reg & MX_TSTAT_LS10)) {
if (sc->mii_flags & MIIF_AUTOTIMEOUT) {
sc->mii_flags &= ~MIIF_AUTOTIMEOUT;
break;
} else
return(0);
} else if (IFM_SUBTYPE(mii->mii_media_active) == IFM_NONE &&
(!(reg & MX_TSTAT_LS10) || !(reg & MX_TSTAT_LS100))) {
if (sc->mii_flags & MIIF_AUTOTIMEOUT) {
sc->mii_flags &= ~MIIF_AUTOTIMEOUT;
break;
} else
return(0);
}
sc->mii_ticks = 0;
mxphy_reset(sc);
mxphy_auto(sc, 0);
break;
}
/* Update the media status. */
mxphy_status(sc);
/* Callback if something changed. */
if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) {
MIIBUS_STATCHG(sc->mii_dev);
sc->mii_active = mii->mii_media_active;
}
return (0);
}
void
mxphy_status(sc)
struct mii_softc *sc;
{
struct mii_data *mii = sc->mii_pdata;
int reg, anlpar;
struct mx_softc *mx_sc;
mx_sc = mii->mii_ifp->if_softc;
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
reg = CSR_READ_4(mx_sc, MX_10BTSTAT) &
(MX_TSTAT_LS10|MX_TSTAT_LS100);
if (!(reg & MX_TSTAT_LS10) || !(reg & MX_TSTAT_LS100))
mii->mii_media_status |= IFM_ACTIVE;
if (sc->mii_flags & MIIF_DOINGAUTO) {
mii->mii_media_active |= IFM_NONE;
return;
}
if (CSR_READ_4(mx_sc, MX_10BTCTRL) & MX_TCTL_AUTONEGENBL &&
CSR_READ_4(mx_sc, MX_10BTSTAT) & MX_TSTAT_ANEGSTAT) {
/* Erg, still trying, I guess... */
if ((CSR_READ_4(mx_sc, MX_10BTSTAT) &
MX_ASTAT_AUTONEGCMP) != MX_ASTAT_AUTONEGCMP) {
mii->mii_media_active |= IFM_NONE;
return;
}
if (CSR_READ_4(mx_sc, MX_10BTSTAT) & MX_TSTAT_LP_CAN_NWAY) {
anlpar = CSR_READ_4(mx_sc, MX_10BTSTAT) >> 16;
if (anlpar & ANLPAR_T4)
mii->mii_media_active |= IFM_100_T4;
else if (anlpar & ANLPAR_TX_FD)
mii->mii_media_active |= IFM_100_TX|IFM_FDX;
else if (anlpar & ANLPAR_TX)
mii->mii_media_active |= IFM_100_TX;
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;
else
mii->mii_media_active |= IFM_NONE;
return;
}
/*
* If the other side doesn't support NWAY, then the
* best we can do is determine if we have a 10Mbps or
* 100Mbps link. There's no way to know if the link
* is full or half duplex, so we default to half duplex
* and hope that the user is clever enough to manually
* change the media settings if we're wrong.
*/
if (!(reg & MX_TSTAT_LS100))
mii->mii_media_active |= IFM_100_TX;
else if (!(reg & MX_TSTAT_LS10))
mii->mii_media_active |= IFM_10_T;
else
mii->mii_media_active |= IFM_NONE;
return;
}
if (CSR_READ_4(mx_sc, MX_NETCFG) & MX_NETCFG_SCRAMBLER)
mii->mii_media_active |= IFM_100_TX;
else
mii->mii_media_active |= IFM_10_T;
if (CSR_READ_4(mx_sc, MX_NETCFG) & MX_NETCFG_FULLDUPLEX)
mii->mii_media_active |= IFM_FDX;
return;
}
static int
mxphy_auto(mii, waitfor)
struct mii_softc *mii;
int waitfor;
{
int i;
struct mx_softc *sc;
sc = mii->mii_pdata->mii_ifp->if_softc;
if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) {
CSR_WRITE_4(sc, MX_10BTCTRL, 0x3FFFF);
MX_CLRBIT(sc, MX_NETCFG, MX_NETCFG_PORTSEL);
MX_SETBIT(sc, MX_NETCFG, MX_NETCFG_FULLDUPLEX);
MX_SETBIT(sc, MX_10BTCTRL, MX_TCTL_AUTONEGENBL);
MX_SETBIT(sc, MX_10BTCTRL, MX_ASTAT_TXDISABLE);
}
if (waitfor) {
/* Wait 500ms for it to complete. */
for (i = 0; i < 500; i++) {
if ((CSR_READ_4(sc, MX_10BTSTAT) & MX_TSTAT_ANEGSTAT)
== MX_ASTAT_AUTONEGCMP)
return(0);
DELAY(1000);
}
/*
* Don't need to worry about clearing MIIF_DOINGAUTO.
* If that's set, a timeout is pending, and it will
* clear the flag.
*/
return(EIO);
}
/*
* Just let it finish asynchronously. This is for the benefit of
* the tick handler driving autonegotiation. Don't want 500ms
* delays all the time while the system is running!
*/
if ((mii->mii_flags & MIIF_DOINGAUTO) == 0)
mii->mii_flags |= MIIF_DOINGAUTO;
return(EJUSTRETURN);
}
static void
mxphy_reset(mii)
struct mii_softc *mii;
{
struct mx_softc *sc;
sc = mii->mii_pdata->mii_ifp->if_softc;
MX_SETBIT(sc, MX_SIARESET, MX_SIA_RESET_NWAY);
DELAY(1000);
MX_CLRBIT(sc, MX_SIARESET, MX_SIA_RESET_NWAY);
return;
}