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freebsd-skq/sys/dev/dc/dcphy.c
Bill Paul 91cc2adb2e Fix some problems reported by Mike Pritchard: 
- Add a flag DC_TX_INTR_ALWAYS which causes the transmit code to
  request a TX done interrupt for every packet. The PNIC seems to need
  this to insure that the sent TX buffers get reaped in a timely fashion.

- Try to unreset the SIA as soon as possible after resetting the whole
  chip.

- Change dcphy to support either 10/100 or 10Mbps only NICs. The
  built-in 21143 ethernet in Compaq Presario machines is 10Mbps only
  and it doesn't work right if we try to advertise 100Mbps modes during
  autoneg. When restricted to only 10mbps modes, it works fine.

  Note that for now, I detect this condition by checking the PCI
  subsystem ID on this NIC (which has a Compaq vendor/device ID).
  Yes, I know that's what the SROM is supposed to be for. I'm deliberately
  ignoring the SROM wherever possible. Sue me.

The latter two fixes allow if_dc to work correctly with the built-in
ethernet on certain Compaq Presario boxes. There are liable to be quite
a few people using these as their home systems who might want to try
FreeBSD; may as well be nice to them.

Now if anybody out there has an Alpha miata with 10Mbps ethernet and
can show me the output from pciconf -l on their system, I'd be grateful.
1999-12-13 21:45:13 +00:00

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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/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/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);*/
(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);
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(dc_sc, DC_10BTSTAT) &
(DC_TSTAT_LS10|DC_TSTAT_LS100);
if (IFM_SUBTYPE(mii->mii_media_active) == IFM_100_TX &&
!(reg & DC_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 & DC_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 & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100))) {
if (sc->mii_flags & MIIF_AUTOTIMEOUT) {
sc->mii_flags &= ~MIIF_AUTOTIMEOUT;
break;
} else
return(0);
} else if (CSR_READ_4(dc_sc, DC_ISR) & DC_ISR_LINKGOOD) {
if (sc->mii_flags & MIIF_AUTOTIMEOUT) {
sc->mii_flags &= ~MIIF_AUTOTIMEOUT;
break;
} else
return(0);
}
sc->mii_ticks = 0;
/*dcphy_reset(sc);*/
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;
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) &
(DC_TSTAT_LS10|DC_TSTAT_LS100);
if (!(reg & DC_TSTAT_LS10) || !(reg & DC_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(dc_sc, DC_10BTCTRL) & DC_TCTL_AUTONEGENBL &&
CSR_READ_4(dc_sc, DC_10BTSTAT) & DC_TSTAT_ANEGSTAT) {
/* Erg, still trying, I guess... */
if ((CSR_READ_4(dc_sc, DC_10BTSTAT) &
DC_ASTAT_AUTONEGCMP) != DC_ASTAT_AUTONEGCMP) {
mii->mii_media_active |= IFM_NONE;
return;
}
if (CSR_READ_4(dc_sc, DC_10BTSTAT) & DC_TSTAT_LP_CAN_NWAY) {
anlpar = CSR_READ_4(dc_sc, DC_10BTSTAT) >> 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_100TXHDX)
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;
}
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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