diff options
Diffstat (limited to 'sys/dev/mii/mlphy.c')
-rw-r--r-- | sys/dev/mii/mlphy.c | 456 |
1 files changed, 456 insertions, 0 deletions
diff --git a/sys/dev/mii/mlphy.c b/sys/dev/mii/mlphy.c new file mode 100644 index 0000000..a269dbc --- /dev/null +++ b/sys/dev/mii/mlphy.c @@ -0,0 +1,456 @@ +/* + * Copyright (c) 1997, 1998, 1999 + * Bill Paul <wpaul@ctr.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. + * + * $Id$ + */ + +/* + * driver for Micro Linear 6692 PHYs + * + * The Micro Linear 6692 is a strange beast, and dealing with it using + * this code framework is tricky. The 6692 is actually a 100Mbps-only + * device, which means that a second PHY is required to support 10Mbps + * modes. However, even though the 6692 does not support 10Mbps modes, + * it can still advertise them when performing autonegotiation. If a + * 10Mbps mode is negotiated, we must program the registers of the + * companion PHY accordingly in addition to programming the registers + * of the 6692. + * + * This device also does not have vendor/device ID registers. + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/malloc.h> +#include <sys/socket.h> +#include <sys/module.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 "miibus_if.h" + +#define ML_STATE_AUTO_SELF 1 +#define ML_STATE_AUTO_OTHER 2 + +struct mlphy_softc { + struct mii_softc ml_mii; + int ml_state; + int ml_linked; +}; + +static int mlphy_probe __P((device_t)); +static int mlphy_attach __P((device_t)); +static int mlphy_detach __P((device_t)); + +static device_method_t mlphy_methods[] = { + /* device interface */ + DEVMETHOD(device_probe, mlphy_probe), + DEVMETHOD(device_attach, mlphy_attach), + DEVMETHOD(device_detach, mlphy_detach), + DEVMETHOD(device_shutdown, bus_generic_shutdown), + { 0, 0 } +}; + +static devclass_t mlphy_devclass; + +static driver_t mlphy_driver = { + "mlphy", + mlphy_methods, + sizeof(struct mlphy_softc) +}; + +DRIVER_MODULE(mlphy, miibus, mlphy_driver, mlphy_devclass, 0, 0); + +static int mlphy_service __P((struct mii_softc *, struct mii_data *, int)); +static void mlphy_reset __P((struct mii_softc *)); +static void mlphy_status __P((struct mii_softc *)); + +static int mlphy_probe(dev) + device_t dev; +{ + struct mii_attach_args *ma; + device_t parent; + + ma = device_get_ivars(dev); + parent = device_get_parent(device_get_parent(dev)); + + /* + * Micro Linear PHY reports oui == 0 model == 0 + */ + if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 && + MII_MODEL(ma->mii_id2) != 0) + return (ENXIO); + + /* + * Make sure the parent is a `tl'. So far, I have only + * encountered the 6692 on an Olicom card with a ThunderLAN + * controller chip. + */ + if (strcmp(device_get_name(parent), "tl") != 0) + return (ENXIO); + + device_set_desc(dev, "Micro Linear 6692 media interface"); + + return (0); +} + +static int mlphy_attach(dev) + device_t dev; +{ + struct mlphy_softc *msc; + struct mii_softc *sc; + struct mii_attach_args *ma; + struct mii_data *mii; + + msc = device_get_softc(dev); + sc = &msc->ml_mii; + 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 = mlphy_service; + sc->mii_pdata = mii; + + mii->mii_instance++; + +#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) + +#if 0 /* See above. */ + ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), + BMCR_ISO); +#endif + ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), + BMCR_LOOP|BMCR_S100); + + sc->mii_flags &= ~MIIF_NOISOLATE; + mii_phy_reset(sc); + sc->mii_flags |= MIIF_NOISOLATE; + + sc->mii_capabilities = + PHY_READ(sc, MII_BMSR) & ma->mii_capmask; + ma->mii_capmask = ~sc->mii_capabilities; + device_printf(dev, " "); + if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) + printf("no media present"); + else + mii_add_media(mii, sc->mii_capabilities, + sc->mii_inst); + printf("\n"); +#undef ADD + MIIBUS_MEDIAINIT(sc->mii_dev); + return(0); +} + +static int mlphy_detach(dev) + device_t dev; +{ + struct mlphy_softc *sc; + struct mii_data *mii; + + sc = device_get_softc(dev); + mii = device_get_softc(device_get_parent(dev)); + sc->ml_mii.mii_dev = NULL; + LIST_REMOVE(&sc->ml_mii, mii_list); + + return(0); +} + +static int +mlphy_service(xsc, mii, cmd) + struct mii_softc *xsc; + struct mii_data *mii; + int cmd; +{ + struct ifmedia_entry *ife = mii->mii_media.ifm_cur; + int reg; + struct mii_softc *other = NULL; + struct mlphy_softc *msc = (struct mlphy_softc *)xsc; + struct mii_softc *sc = (struct mii_softc *)&msc->ml_mii; + device_t *devlist; + int devs, i; + + /* + * See if there's another PHY on this bus with us. + * If so, we may need it for 10Mbps modes. + */ + device_get_children(msc->ml_mii.mii_dev, &devlist, &devs); + for (i = 0; i < devs; i++) { + if (strcmp(device_get_name(devlist[i]), "mlphy")) { + other = device_get_softc(devlist[i]); + break; + } + } + + 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; + + switch (IFM_SUBTYPE(ife->ifm_media)) { + case IFM_AUTO: + /* + * For autonegotiation, reset and isolate the + * companion PHY (if any) and then do NWAY + * autonegotiation ourselves. + */ + msc->ml_state = ML_STATE_AUTO_SELF; + if (other != NULL) { + mii_phy_reset(other); + PHY_WRITE(other, MII_BMCR, BMCR_ISO); + } + (void) mii_phy_auto(sc, 1); + msc->ml_linked = 0; + return(0); + break; + case IFM_10_T: + /* + * For 10baseT modes, reset and program the + * companion PHY (of any), then program ourselves + * to match. This will put us in pass-through + * mode and let the companion PHY do all the + * work. + * + * BMCR data is stored in the ifmedia entry. + */ + if (other != NULL) { + mii_phy_reset(other); + PHY_WRITE(other, MII_BMCR, ife->ifm_data); + } + PHY_WRITE(sc, MII_ANAR, mii_anar(ife->ifm_media)); + PHY_WRITE(sc, MII_BMCR, ife->ifm_data); + msc->ml_state = 0; + break; + case IFM_100_TX: + /* + * For 100baseTX modes, reset and isolate the + * companion PHY (if any), then program ourselves + * accordingly. + * + * BMCR data is stored in the ifmedia entry. + */ + if (other != NULL) { + mii_phy_reset(other); + PHY_WRITE(other, MII_BMCR, BMCR_ISO); + } + PHY_WRITE(sc, MII_ANAR, mii_anar(ife->ifm_media)); + PHY_WRITE(sc, MII_BMCR, ife->ifm_data); + msc->ml_state = 0; + break; + case IFM_100_T4: + /* + * XXX Not supported as a manual setting right now. + */ + return (EINVAL); + default: + break; + + } + break; + + case MII_TICK: + /* + * If we're not currently selected, just return. + */ + if (IFM_INST(ife->ifm_media) != sc->mii_inst) + return (0); + + /* + * Only used for autonegotiation. + */ + if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) + return (0); + + /* + * Is the interface even up? + */ + if ((mii->mii_ifp->if_flags & IFF_UP) == 0) + return (0); + + /* + * Only retry autonegotiation every 5 seconds. + */ + if (++sc->mii_ticks != 5) + return (0); + + sc->mii_ticks = 0; + + /* + * 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. + * If we're in a 10Mbps mode, check the link of the + * 10Mbps PHY. Sometimes the Micro Linear PHY's + * linkstat bit will clear while the linkstat bit of + * the companion PHY will remain set. + */ + if (msc->ml_state == ML_STATE_AUTO_OTHER) { + reg = PHY_READ(other, MII_BMSR) | + PHY_READ(other, MII_BMSR); + } else { + reg = PHY_READ(sc, MII_BMSR) | + PHY_READ(sc, MII_BMSR); + } + + if (reg & BMSR_LINK) { + if (!msc->ml_linked) { + msc->ml_linked = 1; + mlphy_status(sc); + break; + } + return(0); + } + + msc->ml_linked = 0; + mii->mii_media_active = IFM_NONE; + mii_phy_reset(sc); + msc->ml_state = ML_STATE_AUTO_SELF; + if (other != NULL) { + mii_phy_reset(other); + PHY_WRITE(other, MII_BMCR, BMCR_ISO); + } + if (mii_phy_auto(sc, 0) == EJUSTRETURN) + return(0); + break; + } + + /* Update the media status. */ + + if (msc->ml_state == ML_STATE_AUTO_OTHER) { + int other_inst; + other_inst = other->mii_inst; + other->mii_inst = sc->mii_inst; + (void) (*other->mii_service)(other, mii, MII_POLLSTAT); + other->mii_inst = other_inst; + sc->mii_active = other->mii_active; + } else + ukphy_status(sc); + + /* Callback if something changed. */ + if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { + MIIBUS_STATCHG(sc->mii_dev); + sc->mii_active = mii->mii_media_active; + } + + return (0); +} + +/* + * The Micro Linear PHY comes out of reset with the 'autoneg + * enable' bit set, which we don't want. + */ +static void mlphy_reset(sc) + struct mii_softc *sc; +{ + int reg; + + mii_phy_reset(sc); + reg = PHY_READ(sc, MII_BMCR); + reg &= ~BMCR_AUTOEN; + PHY_WRITE(sc, MII_BMCR, reg); + + return; +} + +/* + * If we negotiate a 10Mbps mode, we need to check for an alternate + * PHY and make sure it's enabled and set correctly. + */ +static void mlphy_status(sc) + struct mii_softc *sc; +{ + struct mlphy_softc *msc = (struct mlphy_softc *)sc; + struct mii_data *mii = msc->ml_mii.mii_pdata; + struct mii_softc *other = NULL; + device_t *devlist; + int devs, i; + + /* See if there's another PHY on the bus with us. */ + device_get_children(msc->ml_mii.mii_dev, &devlist, &devs); + for (i = 0; i < devs; i++) { + if (strcmp(device_get_name(devlist[i]), "mlphy")) { + other = device_get_softc(devlist[i]); + break; + } + } + + if (other == NULL) + return; + + ukphy_status(sc); + + if (IFM_SUBTYPE(mii->mii_media_active) != IFM_10_T) { + msc->ml_state = ML_STATE_AUTO_SELF; + mii_phy_reset(other); + PHY_WRITE(other, MII_BMCR, BMCR_ISO); + } + + if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T) { + msc->ml_state = ML_STATE_AUTO_OTHER; + mlphy_reset(&msc->ml_mii); + PHY_WRITE(&msc->ml_mii, MII_BMCR, BMCR_ISO); + mii_phy_reset(other); + mii_phy_auto(other, 1); + } + + return; +} |