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freebsd-dev/sys/dev/mii/e1000phy.c
Pyun YongHyeon bbc9416dc9 o Add support code for newer Marvell PHYs. 
o Remove unused static global variable e1000phy_debug.
o Take advantage of mii_phy_dev_probe().
o Use MII_ANEGTICKS/MII_ANEGTICKS_GIGE instead of magic number 5.
o Add IFM_NONE as e1000phy(4) supports it without issues.
o Nuke magic PHY programming sequence in PHY reset and follow correct
  reset sequence. [1]
o Make manual media selection work for all supported media types.
o Don't set MIIF_NOISOLATE so e1000phy(4) can be used in
  configurations with multiple PHYs.
o In 1000baseT, when setting the link manually, one side must be the
  master and the other the slave. If LINK0 is set, program the PHY
  to be a master, otherwise it's a slave.
o When we lost a link, reset mii_ticks immediately so it correctly
  check number of seconds elapsed in autonegotiation phase.
o Announce link loss right after it happens.
o After kicking autonegotiation, report PHY status instead of
  returning immediatly.
o When link state check is in progress, check auto negotiation
  completion bit only when auto negotiation is enbaled.
o When PHY is resolved to a master, show it with IFM_FLAG2.

Special thanks to marius who fixed several nits in original patch.
In half-duplex mode, nfe(4) fails to send packets. I think it's a bug
in nfe(4) as the same PHY works without problems on msk(4).

Obtained from:	em(4) [1]
Reviewed by:	marius
Tested by:	bz
2006-12-11 11:09:48 +00:00

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/*-
* 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
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* driver for the Marvell 88E1000 series external 1000/100/10-BT PHY.
*/
/*
* Support added for the Marvell 88E1011 (Alaska) 1000/100/10baseTX and
* 1000baseSX PHY.
* Nathan Binkert <nate@openbsd.org>
* Jung-uk Kim <jkim@niksun.com>
*/
#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 <net/if.h>
#include <net/if_media.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include "miidevs.h"
#include <dev/mii/e1000phyreg.h>
#include "miibus_if.h"
static int e1000phy_probe(device_t);
static int e1000phy_attach(device_t);
struct e1000phy_softc {
struct mii_softc mii_sc;
int mii_model;
};
static device_method_t e1000phy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, e1000phy_probe),
DEVMETHOD(device_attach, e1000phy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
{ 0, 0 }
};
static devclass_t e1000phy_devclass;
static driver_t e1000phy_driver = {
"e1000phy",
e1000phy_methods,
sizeof(struct e1000phy_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 e1000phy_softc *);
static const struct mii_phydesc e1000phys[] = {
MII_PHY_DESC(MARVELL, E1000),
MII_PHY_DESC(MARVELL, E1011),
MII_PHY_DESC(MARVELL, E1000_3),
MII_PHY_DESC(MARVELL, E1000S),
MII_PHY_DESC(MARVELL, E1000_5),
MII_PHY_DESC(MARVELL, E1000_6),
MII_PHY_DESC(MARVELL, E3082),
MII_PHY_DESC(MARVELL, E1112),
MII_PHY_DESC(MARVELL, E1149),
MII_PHY_DESC(MARVELL, E1111),
MII_PHY_DESC(MARVELL, E1116),
MII_PHY_DESC(MARVELL, E1118),
MII_PHY_DESC(xxMARVELL, E1000),
MII_PHY_DESC(xxMARVELL, E1011),
MII_PHY_DESC(xxMARVELL, E1000_3),
MII_PHY_DESC(xxMARVELL, E1000_5),
MII_PHY_DESC(xxMARVELL, E1111),
MII_PHY_END
};
static int
e1000phy_probe(device_t dev)
{
return (mii_phy_dev_probe(dev, e1000phys, BUS_PROBE_DEFAULT));
}
static int
e1000phy_attach(device_t dev)
{
struct e1000phy_softc *esc;
struct mii_softc *sc;
struct mii_attach_args *ma;
struct mii_data *mii;
int fast_ether;
esc = device_get_softc(dev);
sc = &esc->mii_sc;
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_anegticks = MII_ANEGTICKS_GIGE;
mii->mii_instance++;
fast_ether = 0;
esc->mii_model = MII_MODEL(ma->mii_id2);
switch (esc->mii_model) {
case MII_MODEL_MARVELL_E1011:
case MII_MODEL_MARVELL_E1112:
if (PHY_READ(sc, E1000_ESSR) & E1000_ESSR_FIBER_LINK)
sc->mii_flags |= MIIF_HAVEFIBER;
break;
case MII_MODEL_MARVELL_E3082:
/* 88E3082 10/100 Fast Ethernet PHY. */
sc->mii_anegticks = MII_ANEGTICKS;
fast_ether = 1;
break;
}
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);
if ((sc->mii_flags & MIIF_HAVEFIBER) == 0) {
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, ");
if (fast_ether == 0) {
/*
* 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_T, 0,
sc->mii_inst), E1000_CR_SPEED_1000);
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, IFM_FDX,
sc->mii_inst),
E1000_CR_SPEED_1000 | E1000_CR_FULL_DUPLEX);
printf("1000baseTX-FDX, ");
}
} else {
ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, sc->mii_inst),
E1000_CR_SPEED_1000 | E1000_CR_FULL_DUPLEX);
printf("1000baseSX-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 void
e1000phy_reset(struct mii_softc *sc)
{
struct e1000phy_softc *esc;
uint16_t reg;
esc = (struct e1000phy_softc *)sc;
reg = PHY_READ(sc, E1000_SCR);
if ((sc->mii_flags & MIIF_HAVEFIBER) != 0) {
reg &= ~E1000_SCR_AUTO_X_MODE;
PHY_WRITE(sc, E1000_SCR, reg);
if (esc->mii_model == MII_MODEL_MARVELL_E1112) {
/* Select 1000BASE-X only mode. */
PHY_WRITE(sc, E1000_EADR, 2);
reg = PHY_READ(sc, E1000_SCR);
reg &= ~E1000_SCR_MODE_MASK;
reg |= E1000_SCR_MODE_1000BX;
PHY_WRITE(sc, E1000_SCR, reg);
PHY_WRITE(sc, E1000_EADR, 1);
}
} else {
switch (esc->mii_model) {
case MII_MODEL_MARVELL_E1111:
case MII_MODEL_MARVELL_E1112:
case MII_MODEL_MARVELL_E1116:
case MII_MODEL_MARVELL_E1118:
case MII_MODEL_MARVELL_E1149:
/* Disable energy detect mode. */
reg &= ~E1000_SCR_EN_DETECT_MASK;
reg |= E1000_SCR_AUTO_X_MODE;
break;
case MII_MODEL_MARVELL_E3082:
reg |= (E1000_SCR_AUTO_X_MODE >> 1);
break;
default:
reg &= ~E1000_SCR_AUTO_X_MODE;
break;
}
/* Enable CRS on TX. */
reg |= E1000_SCR_ASSERT_CRS_ON_TX;
/* Auto correction for reversed cable polarity. */
reg &= ~E1000_SCR_POLARITY_REVERSAL;
PHY_WRITE(sc, E1000_SCR, reg);
}
switch (MII_MODEL(esc->mii_model)) {
case MII_MODEL_MARVELL_E3082:
case MII_MODEL_MARVELL_E1112:
case MII_MODEL_MARVELL_E1116:
case MII_MODEL_MARVELL_E1118:
case MII_MODEL_MARVELL_E1149:
break;
default:
/* Force TX_CLK to 25MHz clock. */
reg = PHY_READ(sc, E1000_ESCR);
reg |= E1000_ESCR_TX_CLK_25;
PHY_WRITE(sc, E1000_ESCR, reg);
break;
}
/* Reset the PHY so all changes take effect. */
reg = PHY_READ(sc, E1000_CR);
reg |= E1000_CR_RESET;
PHY_WRITE(sc, E1000_CR, reg);
}
static int
e1000phy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
struct e1000phy_softc *esc = (struct e1000phy_softc *)sc;
uint16_t speed, gig;
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;
if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO) {
e1000phy_mii_phy_auto(esc);
break;
}
speed = 0;
switch (IFM_SUBTYPE(ife->ifm_media)) {
case IFM_1000_T:
if (esc->mii_model == MII_MODEL_MARVELL_E3082)
return (EINVAL);
speed = E1000_CR_SPEED_1000;
break;
case IFM_1000_SX:
if (esc->mii_model == MII_MODEL_MARVELL_E3082)
return (EINVAL);
speed = E1000_CR_SPEED_1000;
break;
case IFM_100_TX:
speed = E1000_CR_SPEED_100;
break;
case IFM_10_T:
speed = E1000_CR_SPEED_10;
break;
case IFM_NONE:
reg = PHY_READ(sc, E1000_CR);
PHY_WRITE(sc, E1000_CR,
reg | E1000_CR_ISOLATE | E1000_CR_POWER_DOWN);
goto done;
default:
return (EINVAL);
}
if (((ife->ifm_media & IFM_GMASK) & IFM_FDX) != 0) {
speed |= E1000_CR_FULL_DUPLEX;
gig = E1000_1GCR_1000T_FD;
} else
gig = E1000_1GCR_1000T;
reg = PHY_READ(sc, E1000_CR);
reg &= ~E1000_CR_AUTO_NEG_ENABLE;
PHY_WRITE(sc, E1000_CR, reg | E1000_CR_RESET);
/*
* 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 (IFM_SUBTYPE(ife->ifm_media) == IFM_1000_T ||
(IFM_SUBTYPE(ife->ifm_media) == IFM_1000_SX)) {
if ((mii->mii_ifp->if_flags & IFF_LINK0))
PHY_WRITE(sc, E1000_1GCR, gig |
E1000_1GCR_MS_ENABLE | E1000_1GCR_MS_VALUE);
else
PHY_WRITE(sc, E1000_1GCR, gig |
E1000_1GCR_MS_ENABLE);
} else {
if (esc->mii_model != MII_MODEL_MARVELL_E3082)
PHY_WRITE(sc, E1000_1GCR, 0);
}
PHY_WRITE(sc, E1000_AR, E1000_AR_SELECTOR_FIELD);
PHY_WRITE(sc, E1000_CR, speed | E1000_CR_RESET);
done:
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) {
sc->mii_ticks = 0;
break;
}
/* Announce link loss right after it happens. */
if (sc->mii_ticks <= sc->mii_anegticks)
return (0);
sc->mii_ticks = 0;
e1000phy_reset(sc);
e1000phy_mii_phy_auto(esc);
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, gsr, 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 ((((bmcr & E1000_CR_AUTO_NEG_ENABLE) != 0) &&
((bmsr & E1000_SR_AUTO_NEG_COMPLETE) == 0)) ||
((ssr & E1000_SSR_LINK) == 0) ||
((ssr & E1000_SSR_SPD_DPLX_RESOLVED) == 0)) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
if ((sc->mii_flags & MIIF_HAVEFIBER) == 0) {
if (ssr & E1000_SSR_1000MBS)
mii->mii_media_active |= IFM_1000_T;
else if (ssr & E1000_SSR_100MBS)
mii->mii_media_active |= IFM_100_TX;
else
mii->mii_media_active |= IFM_10_T;
} else {
if (ssr & E1000_SSR_1000MBS)
mii->mii_media_active |= IFM_1000_SX;
}
if (ssr & E1000_SSR_DUPLEX)
mii->mii_media_active |= IFM_FDX;
else
mii->mii_media_active |= IFM_HDX;
if ((sc->mii_flags & MIIF_HAVEFIBER) == 0) {
/* 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;
}
}
/* FLAG2 : local PHY resolved to MASTER */
if ((IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_T) ||
(IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_SX)) {
PHY_READ(sc, E1000_1GSR);
gsr = PHY_READ(sc, E1000_1GSR);
if ((gsr & E1000_1GSR_MS_CONFIG_RES) != 0)
mii->mii_media_active |= IFM_FLAG2;
}
}
static int
e1000phy_mii_phy_auto(struct e1000phy_softc *esc)
{
struct mii_softc *sc;
sc = &esc->mii_sc;
if ((sc->mii_flags & MIIF_HAVEFIBER) == 0)
PHY_WRITE(sc, E1000_AR, E1000_AR_10T | E1000_AR_10T_FD |
E1000_AR_100TX | E1000_AR_100TX_FD |
E1000_AR_PAUSE | E1000_AR_ASM_DIR);
else
PHY_WRITE(sc, E1000_AR, E1000_FA_1000X_FD | E1000_FA_1000X |
E1000_FA_SYM_PAUSE | E1000_FA_ASYM_PAUSE);
if (esc->mii_model != MII_MODEL_MARVELL_E3082)
PHY_WRITE(sc, E1000_1GCR,
E1000_1GCR_1000T_FD | E1000_1GCR_1000T);
PHY_WRITE(sc, E1000_CR,
E1000_CR_AUTO_NEG_ENABLE | E1000_CR_RESTART_AUTO_NEG);
return (EJUSTRETURN);
}
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