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freebsd/sys/dev/mii/e1000phy.c
Jonathan Lemon d9730b8b53 Cleanup pass for mii drivers. 
. Make internal service routines static.
   . Use a consistent ordering of checks in MII_TICK.  Do the work in the
     mii_phy_tick() subroutine if appropriate.
   . Call mii_phy_update() to trigger the callbacks.
2001-09-29 19:18:52 +00:00

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/* $FreeBSD$ */
/*
* Principal Author: Parag Patel
* Copyright (c) 2001
* 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 unmodified, 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 AUTHOR 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 AUTHOR 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.
*
* Additonal Copyright (c) 2001 by Traakan Software under same licence.
* Secondary Author: Matthew Jacob
*/
/*
* driver for the Marvell 88E1000 series external 1000/100/10-BT PHY.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/bus.h>
#include <machine/clock.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/e1000phyreg.h>
#include "miibus_if.h"
static int e1000phy_probe(device_t);
static int e1000phy_attach(device_t);
static int e1000phy_detach(device_t);
static device_method_t e1000phy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, e1000phy_probe),
DEVMETHOD(device_attach, e1000phy_attach),
DEVMETHOD(device_detach, e1000phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
{ 0, 0 }
};
static devclass_t e1000phy_devclass;
static driver_t e1000phy_driver = {
"e1000phy", e1000phy_methods, sizeof (struct mii_softc)
};
DRIVER_MODULE(e1000phy, miibus, e1000phy_driver, e1000phy_devclass, 0, 0);
static int e1000phy_service(struct mii_softc *, struct mii_data *, int);
static void e1000phy_status(struct mii_softc *);
static void e1000phy_reset(struct mii_softc *);
static int e1000phy_mii_phy_auto(struct mii_softc *, int);
extern void mii_phy_auto_timeout(void *);
static int e1000phy_debug = 0;
static int
e1000phy_probe(device_t dev)
{
struct mii_attach_args *ma;
u_int32_t id;
ma = device_get_ivars(dev);
id = ((ma->mii_id1 << 16) | ma->mii_id2) & E1000_ID_MASK;
if (id != E1000_ID_88E1000 && id != E1000_ID_88E1000S) {
return ENXIO;
}
device_set_desc(dev, MII_STR_MARVELL_E1000);
return 0;
}
static int
e1000phy_attach(device_t dev)
{
struct mii_softc *sc;
struct mii_attach_args *ma;
struct mii_data *mii;
getenv_int("e1000phy_debug", &e1000phy_debug);
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 = e1000phy_service;
sc->mii_pdata = mii;
sc->mii_flags |= MIIF_NOISOLATE;
mii->mii_instance++;
e1000phy_reset(sc);
device_printf(dev, " ");
#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
/*
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
E1000_CR_ISOLATE);
*/
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst),
E1000_CR_SPEED_10);
printf("10baseT, ");
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst),
E1000_CR_SPEED_10 | E1000_CR_FULL_DUPLEX);
printf("10baseT-FDX, ");
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst),
E1000_CR_SPEED_100);
printf("100baseTX, ");
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst),
E1000_CR_SPEED_100 | E1000_CR_FULL_DUPLEX);
printf("100baseTX-FDX, ");
/*
* 1000BT-simplex not supported; driver must ignore this entry,
* but it must be present in order to manually set full-duplex.
*/
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_TX, 0, sc->mii_inst),
E1000_CR_SPEED_1000);
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_TX, IFM_FDX, sc->mii_inst),
E1000_CR_SPEED_1000 | E1000_CR_FULL_DUPLEX);
printf("1000baseTX-FDX, ");
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0);
printf("auto\n");
#undef ADD
MIIBUS_MEDIAINIT(sc->mii_dev);
return(0);
}
static int
e1000phy_detach(device_t dev)
{
struct mii_softc *sc;
struct mii_data *mii;
sc = device_get_softc(dev);
mii = device_get_softc(device_get_parent(dev));
if (sc->mii_flags & MIIF_DOINGAUTO)
untimeout(mii_phy_auto_timeout, sc, sc->mii_auto_ch);
sc->mii_dev = NULL;
LIST_REMOVE(sc, mii_list);
return 0;
}
static void
e1000phy_reset(struct mii_softc *sc)
{
u_int32_t reg;
int i;
/* initialize custom E1000 registers to magic values */
reg = PHY_READ(sc, E1000_SCR);
reg &= ~E1000_SCR_AUTO_X_MODE;
PHY_WRITE(sc, E1000_SCR, reg);
/* normal PHY reset */
/*mii_phy_reset(sc);*/
reg = PHY_READ(sc, E1000_CR);
reg |= E1000_CR_RESET;
PHY_WRITE(sc, E1000_CR, reg);
for (i = 0; i < 500; i++) {
DELAY(1);
reg = PHY_READ(sc, E1000_CR);
if (!(reg & E1000_CR_RESET))
break;
}
/* set more custom E1000 registers to magic values */
reg = PHY_READ(sc, E1000_SCR);
reg |= E1000_SCR_ASSERT_CRS_ON_TX;
PHY_WRITE(sc, E1000_SCR, reg);
reg = PHY_READ(sc, E1000_ESCR);
reg |= E1000_ESCR_TX_CLK_25;
PHY_WRITE(sc, E1000_ESCR, reg);
/* even more magic to reset DSP? */
PHY_WRITE(sc, 29, 0x1d);
PHY_WRITE(sc, 30, 0xc1);
PHY_WRITE(sc, 30, 0x00);
}
static int
e1000phy_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, E1000_CR);
PHY_WRITE(sc, E1000_CR, reg | E1000_CR_ISOLATE);
return (0);
}
/*
* If the interface is not up, don't do anything.
*/
if ((mii->mii_ifp->if_flags & IFF_UP) == 0) {
break;
}
switch (IFM_SUBTYPE(ife->ifm_media)) {
case IFM_AUTO:
/*
* If we're already in auto mode, just return.
*/
if (sc->mii_flags & MIIF_DOINGAUTO) {
return (0);
}
e1000phy_reset(sc);
(void)e1000phy_mii_phy_auto(sc, 1);
break;
case IFM_1000_TX:
if (sc->mii_flags & MIIF_DOINGAUTO)
return (0);
e1000phy_reset(sc);
/* TODO - any other way to force 1000BT? */
(void)e1000phy_mii_phy_auto(sc, 1);
break;
case IFM_100_TX:
e1000phy_reset(sc);
if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
PHY_WRITE(sc, E1000_CR,
E1000_CR_FULL_DUPLEX | E1000_CR_SPEED_100);
PHY_WRITE(sc, E1000_AR, E1000_AR_100TX_FD);
} else {
PHY_WRITE(sc, E1000_CR, E1000_CR_SPEED_100);
PHY_WRITE(sc, E1000_AR, E1000_AR_100TX);
}
break;
case IFM_10_T:
e1000phy_reset(sc);
if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
PHY_WRITE(sc, E1000_CR,
E1000_CR_FULL_DUPLEX | E1000_CR_SPEED_10);
PHY_WRITE(sc, E1000_AR, E1000_AR_10T_FD);
} else {
PHY_WRITE(sc, E1000_CR, E1000_CR_SPEED_10);
PHY_WRITE(sc, E1000_AR, E1000_AR_10T);
}
break;
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 for link.
* Read the status register twice; BMSR_LINK is latch-low.
*/
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)
return (0);
sc->mii_ticks = 0;
e1000phy_reset(sc);
if (e1000phy_mii_phy_auto(sc, 0) == EJUSTRETURN)
return (0);
break;
}
/* Update the media status. */
e1000phy_status(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
static void
e1000phy_status(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
int bmsr, bmcr, esr, ssr, isr, ar, lpar;
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
bmsr = PHY_READ(sc, E1000_SR) | PHY_READ(sc, E1000_SR);
esr = PHY_READ(sc, E1000_ESR);
bmcr = PHY_READ(sc, E1000_CR);
ssr = PHY_READ(sc, E1000_SSR);
isr = PHY_READ(sc, E1000_ISR);
ar = PHY_READ(sc, E1000_AR);
lpar = PHY_READ(sc, E1000_LPAR);
if (bmsr & E1000_SR_LINK_STATUS)
mii->mii_media_status |= IFM_ACTIVE;
if (bmcr & E1000_CR_LOOPBACK)
mii->mii_media_active |= IFM_LOOP;
if ((sc->mii_flags & MIIF_DOINGAUTO) &&
(!(bmsr & E1000_SR_AUTO_NEG_COMPLETE) || !(ssr & E1000_SSR_LINK) ||
!(ssr & E1000_SSR_SPD_DPLX_RESOLVED))) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
if (ssr & E1000_SSR_1000MBS)
mii->mii_media_active |= IFM_1000_TX;
else if (ssr & E1000_SSR_100MBS)
mii->mii_media_active |= IFM_100_TX;
else
mii->mii_media_active |= IFM_10_T;
if (ssr & E1000_SSR_DUPLEX)
mii->mii_media_active |= IFM_FDX;
else
mii->mii_media_active |= IFM_HDX;
/* FLAG0==rx-flow-control FLAG1==tx-flow-control */
if ((ar & E1000_AR_PAUSE) && (lpar & E1000_LPAR_PAUSE)) {
mii->mii_media_active |= IFM_FLAG0 | IFM_FLAG1;
} else if (!(ar & E1000_AR_PAUSE) && (ar & E1000_AR_ASM_DIR) &&
(lpar & E1000_LPAR_PAUSE) && (lpar & E1000_LPAR_ASM_DIR)) {
mii->mii_media_active |= IFM_FLAG1;
} else if ((ar & E1000_AR_PAUSE) && (ar & E1000_AR_ASM_DIR) &&
!(lpar & E1000_LPAR_PAUSE) && (lpar & E1000_LPAR_ASM_DIR)) {
mii->mii_media_active |= IFM_FLAG0;
}
}
static int
e1000phy_mii_phy_auto(struct mii_softc *mii, int waitfor)
{
int bmsr, i;
if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) {
PHY_WRITE(mii, E1000_AR, E1000_AR_10T | E1000_AR_10T_FD |
E1000_AR_100TX | E1000_AR_100TX_FD |
E1000_AR_PAUSE | E1000_AR_ASM_DIR);
PHY_WRITE(mii, E1000_1GCR, E1000_1GCR_1000T_FD);
PHY_WRITE(mii, E1000_CR,
E1000_CR_AUTO_NEG_ENABLE | E1000_CR_RESTART_AUTO_NEG);
}
if (waitfor) {
/* Wait 500ms for it to complete. */
for (i = 0; i < 500; i++) {
bmsr =
PHY_READ(mii, E1000_SR) | PHY_READ(mii, E1000_SR);
if (bmsr & E1000_SR_AUTO_NEG_COMPLETE) {
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. [do it anyway]
*/
}
/*
* 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;
mii->mii_ticks = 0;
mii->mii_auto_ch = timeout(mii_phy_auto_timeout, mii, hz >> 1);
}
return (EJUSTRETURN);
}
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