File: [local] / sys / dev / mii / dcphy.c (download)
Revision 1.1, Tue Mar 4 16:12:47 2008 UTC (16 years, 1 month ago) by nbrk
Branch point for: MAIN
Initial revision
|
/* $OpenBSD: dcphy.c,v 1.18 2006/12/27 19:11:08 kettenis Exp $ */
/*
* 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: src/sys/dev/mii/dcphy.c,v 1.6 2000/10/05 17:36:14 wpaul Exp $
*/
/*
* Pseudo-driver for internal NWAY support on DEC 21143 and workalike
* controllers. Technically we're abusing the miibus code to handle
* 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/device.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/timeout.h>
#include <sys/errno.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/if_media.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/mii/miidevs.h>
#include <machine/bus.h>
#include <dev/pci/pcivar.h>
#include <dev/ic/dcreg.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)
#define MIIF_AUTOTIMEOUT 0x0004
/*
* This is the subsystem ID for the built-in 21143 ethernet
* in several Compaq Presario systems. Apparently these are
* 10Mbps only, so we need to treat them specially.
*/
#define COMPAQ_PRESARIO_ID 0xb0bb0e11
int dcphy_match(struct device *, void *, void *);
void dcphy_attach(struct device *, struct device *, void *);
struct cfattach dcphy_ca = {
sizeof(struct mii_softc), dcphy_match, dcphy_attach, mii_phy_detach,
mii_phy_activate
};
struct cfdriver dcphy_cd = {
NULL, "dcphy", DV_DULL
};
int dcphy_service(struct mii_softc *, struct mii_data *, int);
void dcphy_status(struct mii_softc *);
int dcphy_mii_phy_auto(struct mii_softc *, int);
void dcphy_reset(struct mii_softc *);
const struct mii_phy_funcs dcphy_funcs = {
dcphy_service, dcphy_status, dcphy_reset,
};
int
dcphy_match(struct device *parent, void *match, void *aux)
{
struct mii_attach_args *ma = aux;
/*
* The dc driver will report the 21143 vendor and device
* ID to let us know that it wants us to attach.
*/
if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxDEC &&
MII_MODEL(ma->mii_id2) == MII_MODEL_xxDEC_xxDC)
return (10);
return (0);
}
void
dcphy_attach(struct device *parent, struct device *self, void *aux)
{
struct mii_softc *sc = (struct mii_softc *)self;
struct mii_attach_args *ma = aux;
struct mii_data *mii = ma->mii_data;
struct dc_softc *dc_sc;
printf(": internal PHY\n");
sc->mii_inst = mii->mii_instance;
sc->mii_phy = ma->mii_phyno;
sc->mii_funcs = &dcphy_funcs;
sc->mii_pdata = mii;
sc->mii_flags = ma->mii_flags;
sc->mii_anegticks = 50;
sc->mii_flags |= MIIF_NOISOLATE;
dc_sc = mii->mii_ifp->if_softc;
CSR_WRITE_4(dc_sc, DC_10BTSTAT, 0);
CSR_WRITE_4(dc_sc, DC_10BTCTRL, 0);
#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
switch(dc_sc->dc_csid) {
case COMPAQ_PRESARIO_ID:
/* Example of how to only allow 10Mbps modes. */
sc->mii_capabilities = BMSR_ANEG|BMSR_10TFDX|BMSR_10THDX;
break;
default:
if (dc_sc->dc_pmode == DC_PMODE_SIA) {
sc->mii_capabilities =
BMSR_ANEG|BMSR_10TFDX|BMSR_10THDX;
} else {
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP,
sc->mii_inst), BMCR_LOOP|BMCR_S100);
sc->mii_capabilities =
BMSR_ANEG|BMSR_100TXFDX|BMSR_100TXHDX|
BMSR_10TFDX|BMSR_10THDX;
}
break;
}
if (dc_sc->dc_type == DC_TYPE_21145)
sc->mii_capabilities = BMSR_10THDX;
sc->mii_capabilities &= ma->mii_capmask;
if (sc->mii_capabilities & BMSR_MEDIAMASK)
mii_phy_add_media(sc);
#undef ADD
}
int
dcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
struct dc_softc *dc_sc;
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
int reg;
u_int32_t mode;
if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
return (ENXIO);
dc_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(dc_sc, DC_NETCFG);
mode &= ~(DC_NETCFG_FULLDUPLEX|DC_NETCFG_PORTSEL|
DC_NETCFG_PCS|DC_NETCFG_SCRAMBLER|DC_NETCFG_SPEEDSEL);
switch (IFM_SUBTYPE(ife->ifm_media)) {
case IFM_AUTO:
/*PHY_RESET(sc);*/
sc->mii_flags &= ~MIIF_DOINGAUTO;
(void) dcphy_mii_phy_auto(sc, 0);
break;
case IFM_100_TX:
PHY_RESET(sc);
DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL);
mode |= DC_NETCFG_PORTSEL|DC_NETCFG_PCS|
DC_NETCFG_SCRAMBLER;
if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
mode |= DC_NETCFG_FULLDUPLEX;
else
mode &= ~DC_NETCFG_FULLDUPLEX;
CSR_WRITE_4(dc_sc, DC_NETCFG, mode);
break;
case IFM_10_T:
DC_CLRBIT(dc_sc, DC_SIARESET, DC_SIA_RESET);
DC_CLRBIT(dc_sc, DC_10BTCTRL, 0xFFFF);
if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3D);
else
DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3F);
DC_SETBIT(dc_sc, DC_SIARESET, DC_SIA_RESET);
DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL);
mode &= ~DC_NETCFG_PORTSEL;
mode |= DC_NETCFG_SPEEDSEL;
if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
mode |= DC_NETCFG_FULLDUPLEX;
else
mode &= ~DC_NETCFG_FULLDUPLEX;
CSR_WRITE_4(dc_sc, DC_NETCFG, mode);
break;
default:
return (EINVAL);
}
break;
case MII_TICK:
/*
* If we're not currently selected, just return.
*/
if (IFM_INST(ife->ifm_media) != sc->mii_inst)
return (0);
/*
* 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;
reg = CSR_READ_4(dc_sc, DC_10BTSTAT);
if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100))
break;
/*
* Only retry autonegotiation every mii_anegticks seconds.
*
* Otherwise, fall through to calling dcphy_status()
* since real Intel 21143 chips don't show valid link
* status until autonegotiation is switched off, and
* that only happens in dcphy_status(). Without this,
* successful autonegotation is never recognised on
* these chips.
*/
if (++sc->mii_ticks <= sc->mii_anegticks)
break;
sc->mii_ticks = 0;
sc->mii_flags &= ~MIIF_DOINGAUTO;
dcphy_mii_phy_auto(sc, 0);
break;
}
/* Update the media status. */
mii_phy_status(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
void
dcphy_status(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
int reg, anlpar, tstat = 0;
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_10BTSTAT);
if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100))
mii->mii_media_status |= IFM_ACTIVE;
if (CSR_READ_4(dc_sc, DC_10BTCTRL) & DC_TCTL_AUTONEGENBL) {
/* Erg, still trying, I guess... */
tstat = CSR_READ_4(dc_sc, DC_10BTSTAT);
if ((tstat & DC_TSTAT_ANEGSTAT) != DC_ASTAT_AUTONEGCMP) {
if ((DC_IS_MACRONIX(dc_sc) || DC_IS_PNICII(dc_sc)) &&
(tstat & DC_TSTAT_ANEGSTAT) == DC_ASTAT_DISABLE)
goto skip;
mii->mii_media_active |= IFM_NONE;
return;
}
if (tstat & DC_TSTAT_LP_CAN_NWAY) {
anlpar = tstat >> 16;
if (anlpar & ANLPAR_T4 &&
sc->mii_capabilities & BMSR_100TXHDX)
mii->mii_media_active |= IFM_100_T4|IFM_HDX;
else if (anlpar & ANLPAR_TX_FD &&
sc->mii_capabilities & BMSR_100TXFDX)
mii->mii_media_active |= IFM_100_TX|IFM_FDX;
else if (anlpar & ANLPAR_TX &&
sc->mii_capabilities & BMSR_100TXHDX)
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;
if (DC_IS_INTEL(dc_sc))
DC_CLRBIT(dc_sc, DC_10BTCTRL,
DC_TCTL_AUTONEGENBL);
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 & DC_TSTAT_LS100))
mii->mii_media_active |= IFM_100_TX|IFM_HDX;
else if (!(reg & DC_TSTAT_LS10))
mii->mii_media_active |= IFM_10_T|IFM_HDX;
else
mii->mii_media_active |= IFM_NONE;
if (DC_IS_INTEL(dc_sc))
DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL);
return;
}
skip:
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;
}
int
dcphy_mii_phy_auto(struct mii_softc *mii, int waitfor)
{
int i;
struct dc_softc *sc;
sc = mii->mii_pdata->mii_ifp->if_softc;
if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) {
DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL);
DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_FULLDUPLEX);
DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET);
if (mii->mii_capabilities & BMSR_100TXHDX)
CSR_WRITE_4(sc, DC_10BTCTRL, 0x3FFFF);
else
CSR_WRITE_4(sc, DC_10BTCTRL, 0xFFFF);
DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET);
DC_SETBIT(sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL);
DC_SETBIT(sc, DC_10BTSTAT, DC_ASTAT_TXDISABLE);
}
if (waitfor) {
/* Wait 500ms for it to complete. */
for (i = 0; i < 500; i++) {
if ((CSR_READ_4(sc, DC_10BTSTAT) & DC_TSTAT_ANEGSTAT)
== DC_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);
}
void
dcphy_reset(struct mii_softc *mii)
{
struct dc_softc *sc;
sc = mii->mii_pdata->mii_ifp->if_softc;
DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET);
DELAY(1000);
DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET);
return;
}
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