freebsd-dev/sys/dev/mii/ciphy.c

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/*
* Copyright (c) 2004
* Bill Paul <wpaul@windriver.com>. 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.
*
* $FreeBSD$
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* Driver for the Cicada CS8201 10/100/1000 copper PHY.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/socket.h>
#include <sys/bus.h>
#include <machine/clock.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 <dev/mii/ciphyreg.h>
#include "miibus_if.h"
#include <machine/bus.h>
/*
#include <dev/vge/if_vgereg.h>
*/
static int ciphy_probe(device_t);
static int ciphy_attach(device_t);
static device_method_t ciphy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, ciphy_probe),
DEVMETHOD(device_attach, ciphy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
{ 0, 0 }
};
static devclass_t ciphy_devclass;
static driver_t ciphy_driver = {
"ciphy",
ciphy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(ciphy, miibus, ciphy_driver, ciphy_devclass, 0, 0);
static int ciphy_service(struct mii_softc *, struct mii_data *, int);
static void ciphy_status(struct mii_softc *);
static void ciphy_reset(struct mii_softc *);
static void ciphy_fixup(struct mii_softc *);
static int
ciphy_probe(dev)
device_t dev;
{
struct mii_attach_args *ma;
ma = device_get_ivars(dev);
if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_CICADA &&
MII_MODEL(ma->mii_id2) == MII_MODEL_CICADA_CS8201) {
device_set_desc(dev, MII_STR_CICADA_CS8201);
return(0);
}
if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_CICADA &&
MII_MODEL(ma->mii_id2) == MII_MODEL_CICADA_CS8201A) {
device_set_desc(dev, MII_STR_CICADA_CS8201A);
return(0);
}
if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_CICADA &&
MII_MODEL(ma->mii_id2) == MII_MODEL_CICADA_CS8201B) {
device_set_desc(dev, MII_STR_CICADA_CS8201B);
return(0);
}
return(ENXIO);
}
static int
ciphy_attach(dev)
device_t dev;
{
struct mii_softc *sc;
struct mii_attach_args *ma;
struct mii_data *mii;
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 = ciphy_service;
sc->mii_pdata = mii;
sc->mii_flags |= MIIF_NOISOLATE;
mii->mii_instance++;
ciphy_reset(sc);
sc->mii_capabilities =
PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
if (sc->mii_capabilities & BMSR_EXTSTAT)
sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
device_printf(dev, " ");
mii_phy_add_media(sc);
printf("\n");
MIIBUS_MEDIAINIT(sc->mii_dev);
return(0);
}
static int
ciphy_service(sc, mii, cmd)
struct mii_softc *sc;
struct mii_data *mii;
int cmd;
{
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
int reg, speed, gig;
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;
ciphy_fixup(sc); /* XXX hardware bug work-around */
switch (IFM_SUBTYPE(ife->ifm_media)) {
case IFM_AUTO:
#ifdef foo
/*
* If we're already in auto mode, just return.
*/
if (PHY_READ(sc, CIPHY_MII_BMCR) & CIPHY_BMCR_AUTOEN)
return (0);
#endif
(void) mii_phy_auto(sc);
break;
case IFM_1000_T:
speed = CIPHY_S1000;
goto setit;
case IFM_100_TX:
speed = CIPHY_S100;
goto setit;
case IFM_10_T:
speed = CIPHY_S10;
setit:
if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
speed |= CIPHY_BMCR_FDX;
gig = CIPHY_1000CTL_AFD;
} else {
gig = CIPHY_1000CTL_AHD;
}
PHY_WRITE(sc, CIPHY_MII_1000CTL, 0);
PHY_WRITE(sc, CIPHY_MII_BMCR, speed);
PHY_WRITE(sc, CIPHY_MII_ANAR, CIPHY_SEL_TYPE);
if (IFM_SUBTYPE(ife->ifm_media) != IFM_1000_T)
break;
PHY_WRITE(sc, CIPHY_MII_1000CTL, gig);
PHY_WRITE(sc, CIPHY_MII_BMCR,
speed|CIPHY_BMCR_AUTOEN|CIPHY_BMCR_STARTNEG);
/*
* When setting the link manually, one side must
* be the master and the other the slave. However
* ifmedia doesn't give us a good way to specify
* this, so we fake it by using one of the LINK
* flags. If LINK0 is set, we program the PHY to
* be a master, otherwise it's a slave.
*/
if ((mii->mii_ifp->if_flags & IFF_LINK0)) {
PHY_WRITE(sc, CIPHY_MII_1000CTL,
gig|CIPHY_1000CTL_MSE|CIPHY_1000CTL_MSC);
} else {
PHY_WRITE(sc, CIPHY_MII_1000CTL,
gig|CIPHY_1000CTL_MSE);
}
break;
case IFM_NONE:
PHY_WRITE(sc, MII_BMCR, BMCR_ISO|BMCR_PDOWN);
break;
case IFM_100_T4:
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;
/*
* 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 = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
if (reg & BMSR_LINK)
break;
/*
* Only retry autonegotiation every 5 seconds.
*/
if (++sc->mii_ticks <= 5/*10*/)
break;
sc->mii_ticks = 0;
mii_phy_auto(sc);
return (0);
}
/* Update the media status. */
ciphy_status(sc);
/*
* Callback if something changed. Note that we need to poke
* apply fixups for certain PHY revs.
*/
if (sc->mii_media_active != mii->mii_media_active ||
sc->mii_media_status != mii->mii_media_status ||
cmd == MII_MEDIACHG) {
ciphy_fixup(sc);
}
mii_phy_update(sc, cmd);
return (0);
}
static void
ciphy_status(sc)
struct mii_softc *sc;
{
struct mii_data *mii = sc->mii_pdata;
int bmsr, bmcr;
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, CIPHY_MII_BMCR);
if (bmcr & CIPHY_BMCR_LOOP)
mii->mii_media_active |= IFM_LOOP;
if (bmcr & CIPHY_BMCR_AUTOEN) {
if ((bmsr & CIPHY_BMSR_ACOMP) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
}
bmsr = PHY_READ(sc, CIPHY_MII_AUXCSR);
switch (bmsr & CIPHY_AUXCSR_SPEED) {
case CIPHY_SPEED10:
mii->mii_media_active |= IFM_10_T;
break;
case CIPHY_SPEED100:
mii->mii_media_active |= IFM_100_TX;
break;
case CIPHY_SPEED1000:
mii->mii_media_active |= IFM_1000_T;
break;
default:
device_printf(sc->mii_dev, "unknown PHY speed %x\n",
bmsr & CIPHY_AUXCSR_SPEED);
break;
}
if (bmsr & CIPHY_AUXCSR_FDX)
mii->mii_media_active |= IFM_FDX;
return;
}
static void
ciphy_reset(struct mii_softc *sc)
{
mii_phy_reset(sc);
DELAY(1000);
return;
}
#define PHY_SETBIT(x, y, z) \
PHY_WRITE(x, y, (PHY_READ(x, y) | (z)))
#define PHY_CLRBIT(x, y, z) \
PHY_WRITE(x, y, (PHY_READ(x, y) & ~(z)))
static void
ciphy_fixup(struct mii_softc *sc)
{
uint16_t model;
uint16_t status, speed;
model = MII_MODEL(PHY_READ(sc, CIPHY_MII_PHYIDR2));
status = PHY_READ(sc, CIPHY_MII_AUXCSR);
speed = status & CIPHY_AUXCSR_SPEED;
switch (model) {
case MII_MODEL_CICADA_CS8201:
/* Turn off "aux mode" (whatever that means) */
PHY_SETBIT(sc, CIPHY_MII_AUXCSR, CIPHY_AUXCSR_MDPPS);
/*
* Work around speed polling bug in VT3119/VT3216
* when using MII in full duplex mode.
*/
if ((speed == CIPHY_SPEED10 || speed == CIPHY_SPEED100) &&
(status & CIPHY_AUXCSR_FDX)) {
PHY_SETBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
} else {
PHY_CLRBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
}
/* Enable link/activity LED blink. */
PHY_SETBIT(sc, CIPHY_MII_LED, CIPHY_LED_LINKACTBLINK);
break;
case MII_MODEL_CICADA_CS8201A:
case MII_MODEL_CICADA_CS8201B:
/*
* Work around speed polling bug in VT3119/VT3216
* when using MII in full duplex mode.
*/
if ((speed == CIPHY_SPEED10 || speed == CIPHY_SPEED100) &&
(status & CIPHY_AUXCSR_FDX)) {
PHY_SETBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
} else {
PHY_CLRBIT(sc, CIPHY_MII_10BTCSR, CIPHY_10BTCSR_ECHO);
}
break;
default:
device_printf(sc->mii_dev, "unknown CICADA PHY model %x\n",
model);
break;
}
return;
}