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freebsd/sys/dev/mii/dcphy.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 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/systm.h>
#include <sys/kernel.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/pcivar.h>
#include <pci/if_dcreg.h>
#include "miibus_if.h"
#if !defined(lint)
static const char rcsid[] =
"$FreeBSD$";
#endif
#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
static int dcphy_probe __P((device_t));
static int dcphy_attach __P((device_t));
static int dcphy_detach __P((device_t));
static device_method_t dcphy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, dcphy_probe),
DEVMETHOD(device_attach, dcphy_attach),
DEVMETHOD(device_detach, dcphy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
{ 0, 0 }
};
static devclass_t dcphy_devclass;
static driver_t dcphy_driver = {
"dcphy",
dcphy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(dcphy, miibus, dcphy_driver, dcphy_devclass, 0, 0);
int dcphy_service __P((struct mii_softc *, struct mii_data *, int));
void dcphy_status __P((struct mii_softc *));
static int dcphy_auto __P((struct mii_softc *, int));
static void dcphy_reset __P((struct mii_softc *));
static int dcphy_probe(dev)
device_t dev;
{
struct mii_attach_args *ma;
ma = device_get_ivars(dev);
/*
* The dc driver will report the 21143 vendor and device
* ID to let us know that it wants us to attach.
*/
if (ma->mii_id1 != DC_VENDORID_DEC ||
ma->mii_id2 != DC_DEVICEID_21143)
return(ENXIO);
device_set_desc(dev, "Intel 21143 NWAY media interface");
return (0);
}
static int dcphy_attach(dev)
device_t dev;
{
struct mii_softc *sc;
struct mii_attach_args *ma;
struct mii_data *mii;
struct dc_softc *dc_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 = dcphy_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);
/*dcphy_reset(sc);*/
dc_sc = mii->mii_ifp->if_softc;
CSR_WRITE_4(dc_sc, DC_10BTSTAT, 0);
CSR_WRITE_4(dc_sc, DC_10BTCTRL, 0);
switch(pci_read_config(device_get_parent(sc->mii_dev),
DC_PCI_CSID, 4)) {
case COMPAQ_PRESARIO_ID:
/* Example of how to only allow 10Mbps modes. */
sc->mii_capabilities = BMSR_ANEG|BMSR_10TFDX|BMSR_10THDX;
break;
default:
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;
}
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 dcphy_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
dcphy_service(sc, mii, cmd)
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;
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:
/*dcphy_reset(sc);*/
sc->mii_flags &= ~MIIF_DOINGAUTO;
(void) dcphy_auto(sc, 0);
break;
case IFM_100_T4:
/*
* XXX Not supported as a manual setting right now.
*/
return (EINVAL);
case IFM_100_TX:
dcphy_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;
}
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);
reg = CSR_READ_4(dc_sc, DC_10BTSTAT) &
(DC_TSTAT_LS10|DC_TSTAT_LS100);
if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100))
return(0);
/*
* Only retry autonegotiation every 5 seconds.
*/
if (++sc->mii_ticks != 50)
return (0);
sc->mii_ticks = 0;
/*if (DC_IS_INTEL(dc_sc))*/
sc->mii_flags &= ~MIIF_DOINGAUTO;
dcphy_auto(sc, 0);
break;
}
/* Update the media status. */
dcphy_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
dcphy_status(sc)
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;
if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
return;
reg = CSR_READ_4(dc_sc, DC_10BTSTAT) &
(DC_TSTAT_LS10|DC_TSTAT_LS100);
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;
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;
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;
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;
else if (!(reg & DC_TSTAT_LS10))
mii->mii_media_active |= IFM_10_T;
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_SCRAMBLER)
mii->mii_media_active |= IFM_100_TX;
else
mii->mii_media_active |= IFM_10_T;
if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX)
mii->mii_media_active |= IFM_FDX;
return;
}
static int
dcphy_auto(mii, waitfor)
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);
}
static void
dcphy_reset(mii)
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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