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| Current File : //compat/linux/proc/68247/root/compat/linux/proc/68247/root/sys/dev/dc/dcphy.c |
/*-
* 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: release/9.1.0/sys/dev/dc/dcphy.c 230707 2012-01-29 00:52:04Z marius $");
/*
* 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/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 <dev/pci/pcivar.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)
#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(device_t);
static int dcphy_attach(device_t);
static device_method_t dcphy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, dcphy_probe),
DEVMETHOD(device_attach, dcphy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD_END
};
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);
static int dcphy_service(struct mii_softc *, struct mii_data *, int);
static void dcphy_status(struct mii_softc *);
static void dcphy_reset(struct mii_softc *);
static int dcphy_auto(struct mii_softc *);
static const struct mii_phy_funcs dcphy_funcs = {
dcphy_service,
dcphy_status,
dcphy_reset
};
static int
dcphy_probe(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 (BUS_PROBE_DEFAULT);
}
static int
dcphy_attach(device_t dev)
{
struct mii_softc *sc;
struct dc_softc *dc_sc;
device_t brdev;
sc = device_get_softc(dev);
mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE,
&dcphy_funcs, 0);
/*PHY_RESET(sc);*/
dc_sc = sc->mii_pdata->mii_ifp->if_softc;
CSR_WRITE_4(dc_sc, DC_10BTSTAT, 0);
CSR_WRITE_4(dc_sc, DC_10BTCTRL, 0);
brdev = device_get_parent(sc->mii_dev);
switch (pci_get_subdevice(brdev) << 16 | pci_get_subvendor(brdev)) {
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
sc->mii_capabilities =
BMSR_ANEG | BMSR_100TXFDX | BMSR_100TXHDX |
BMSR_10TFDX | BMSR_10THDX;
break;
}
sc->mii_capabilities &= sc->mii_capmask;
device_printf(dev, " ");
mii_phy_add_media(sc);
printf("\n");
MIIBUS_MEDIAINIT(sc->mii_dev);
return (0);
}
static 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;
dc_sc = mii->mii_ifp->if_softc;
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;
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);*/
(void)dcphy_auto(sc);
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_FDX) != 0)
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_FDX) != 0)
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_FDX) != 0)
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:
/*
* 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 5 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 autonegotiation is never recognised on
* these chips.
*/
if (++sc->mii_ticks <= 50)
break;
sc->mii_ticks = 0;
dcphy_auto(sc);
break;
}
/* Update the media status. */
PHY_STATUS(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
static void
dcphy_status(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
int anlpar, tstat;
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;
tstat = CSR_READ_4(dc_sc, DC_10BTSTAT);
if (!(tstat & DC_TSTAT_LS10) || !(tstat & 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... */
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_TX_FD &&
sc->mii_capabilities & BMSR_100TXFDX)
mii->mii_media_active |= IFM_100_TX | IFM_FDX;
else if (anlpar & ANLPAR_T4 &&
sc->mii_capabilities & BMSR_100T4)
mii->mii_media_active |= IFM_100_T4 | IFM_HDX;
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 (!(tstat & DC_TSTAT_LS100))
mii->mii_media_active |= IFM_100_TX | IFM_HDX;
else if (!(tstat & 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;
}
static int
dcphy_auto(struct mii_softc *mii)
{
struct dc_softc *sc;
sc = mii->mii_pdata->mii_ifp->if_softc;
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);
return (EJUSTRETURN);
}
static 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);
}