NetBSD-5.0.2/sys/dev/mii/nsphy.c
/* $NetBSD: nsphy.c,v 1.54 2008/05/04 17:06:10 xtraeme Exp $ */
/*-
* Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 THE FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*
* Copyright (c) 1997 Manuel Bouyer. 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 Manuel Bouyer.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
*/
/*
* driver for National Semiconductor's DP83840A ethernet 10/100 PHY
* Data Sheet available from www.national.com
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: nsphy.c,v 1.54 2008/05/04 17:06:10 xtraeme Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <net/if.h>
#include <net/if_media.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/mii/miidevs.h>
#include <dev/mii/nsphyreg.h>
static int nsphymatch(device_t, cfdata_t, void *);
static void nsphyattach(device_t, device_t, void *);
CFATTACH_DECL_NEW(nsphy, sizeof(struct mii_softc),
nsphymatch, nsphyattach, mii_phy_detach, mii_phy_activate);
static int nsphy_service(struct mii_softc *, struct mii_data *, int);
static void nsphy_status(struct mii_softc *);
static void nsphy_reset(struct mii_softc *sc);
static const struct mii_phy_funcs nsphy_funcs = {
nsphy_service, nsphy_status, nsphy_reset,
};
static const struct mii_phydesc nsphys[] = {
{ MII_OUI_xxNATSEMI, MII_MODEL_xxNATSEMI_DP83840,
MII_STR_xxNATSEMI_DP83840 },
{ 0, 0,
NULL },
};
static int
nsphymatch(device_t parent, cfdata_t match, void *aux)
{
struct mii_attach_args *ma = aux;
if (mii_phy_match(ma, nsphys) != NULL)
return (10);
return (0);
}
static void
nsphyattach(device_t parent, device_t self, void *aux)
{
struct mii_softc *sc = device_private(self);
struct mii_attach_args *ma = aux;
struct mii_data *mii = ma->mii_data;
const struct mii_phydesc *mpd;
mpd = mii_phy_match(ma, nsphys);
aprint_naive(": Media interface\n");
aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
sc->mii_dev = self;
sc->mii_inst = mii->mii_instance;
sc->mii_phy = ma->mii_phyno;
sc->mii_funcs = &nsphy_funcs;
sc->mii_pdata = mii;
sc->mii_flags = ma->mii_flags;
sc->mii_anegticks = MII_ANEGTICKS;
PHY_RESET(sc);
sc->mii_capabilities =
PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
aprint_normal_dev(self, "");
if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
aprint_error("no media present");
else
mii_phy_add_media(sc);
aprint_normal("\n");
if (!pmf_device_register(self, NULL, mii_phy_resume))
aprint_error_dev(self, "couldn't establish power handler\n");
}
static int
nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
int reg;
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) {
reg = PHY_READ(sc, MII_BMCR);
PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
return (0);
}
/*
* If the interface is not up, don't do anything.
*/
if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
break;
reg = PHY_READ(sc, MII_NSPHY_PCR);
/*
* Set up the PCR to use LED4 to indicate full-duplex
* in both 10baseT and 100baseTX modes.
*/
reg |= PCR_LED4MODE;
/*
* Make sure Carrier Integrity Monitor function is
* disabled (normal for Node operation, but sometimes
* it's not set?!)
*/
reg |= PCR_CIMDIS;
/*
* Make sure "force link good" is set to normal mode.
* It's only intended for debugging.
*/
reg |= PCR_FLINK100;
/*
* Mystery bits which are supposedly `reserved',
* but we seem to need to set them when the PHY
* is connected to some interfaces:
*
* 0x0400 is needed for fxp
* (Intel EtherExpress Pro 10+/100B, 82557 chip)
* (nsphy with a DP83840 chip)
* 0x0100 may be needed for some other card
*/
reg |= 0x0100 | 0x0400;
PHY_WRITE(sc, MII_NSPHY_PCR, reg);
mii_phy_setmedia(sc);
break;
case MII_TICK:
/*
* If we're not currently selected, just return.
*/
if (IFM_INST(ife->ifm_media) != sc->mii_inst)
return (0);
if (mii_phy_tick(sc) == EJUSTRETURN)
return (0);
break;
case MII_DOWN:
mii_phy_down(sc);
return (0);
}
/* Update the media status. */
mii_phy_status(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
static void
nsphy_status(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
int bmsr, bmcr, par, anlpar;
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
bmsr = PHY_READ(sc, MII_BMSR) |
PHY_READ(sc, MII_BMSR);
if (bmsr & BMSR_LINK)
mii->mii_media_status |= IFM_ACTIVE;
bmcr = PHY_READ(sc, MII_BMCR);
if (bmcr & BMCR_ISO) {
mii->mii_media_active |= IFM_NONE;
mii->mii_media_status = 0;
return;
}
if (bmcr & BMCR_LOOP)
mii->mii_media_active |= IFM_LOOP;
if (bmcr & BMCR_AUTOEN) {
/*
* The PAR status bits are only valid of autonegotiation
* has completed (or it's disabled).
*/
if ((bmsr & BMSR_ACOMP) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
/*
* Argh. The PAR doesn't seem to indicate duplex mode
* properly! Determine media based on link partner's
* advertised capabilities.
*/
if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
anlpar = PHY_READ(sc, MII_ANAR) &
PHY_READ(sc, MII_ANLPAR);
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;
}
/*
* Link partner is not capable of autonegotiation.
* We will never be in full-duplex mode if this is
* the case, so reading the PAR is OK.
*/
par = PHY_READ(sc, MII_NSPHY_PAR);
if (par & PAR_10)
mii->mii_media_active |= IFM_10_T;
else
mii->mii_media_active |= IFM_100_TX;
#if 0
if (par & PAR_FDX)
mii->mii_media_active |= IFM_FDX;
#endif
} else
mii->mii_media_active = ife->ifm_media;
}
static void
nsphy_reset(struct mii_softc *sc)
{
int reg, i;
if (sc->mii_flags & MIIF_NOISOLATE)
reg = BMCR_RESET;
else
reg = BMCR_RESET | BMCR_ISO;
PHY_WRITE(sc, MII_BMCR, reg);
/*
* Give it a little time to settle in case we just got power.
* The DP83840A data sheet suggests that a soft reset not happen
* within 500us of power being applied. Be conservative.
*/
delay(1000);
/*
* Wait another 2s for it to complete.
* This is only a little overkill as under normal circumstances
* the PHY can take up to 1s to complete reset.
* This is also a bit odd because after a reset, the BMCR will
* clear the reset bit and simply reports 0 even though the reset
* is not yet complete.
*/
for (i = 0; i < 1000; i++) {
reg = PHY_READ(sc, MII_BMCR);
if (reg && ((reg & BMCR_RESET) == 0))
break;
delay(2000);
}
if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0)) {
PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
}
}