diff options
author | wpaul <wpaul@FreeBSD.org> | 2000-09-20 17:04:30 +0000 |
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committer | wpaul <wpaul@FreeBSD.org> | 2000-09-20 17:04:30 +0000 |
commit | 258ce9d2c6d2d874847ea653677e0b52e96e99ac (patch) | |
tree | 65bfac037182490d550905b48e772e95eefc83ee /sys/dev/mii | |
parent | a5f9667adeef1c89fc61072bc8cd4e07916557f7 (diff) | |
download | FreeBSD-src-258ce9d2c6d2d874847ea653677e0b52e96e99ac.zip FreeBSD-src-258ce9d2c6d2d874847ea653677e0b52e96e99ac.tar.gz |
Add a homePNA PHY driver. This is really only a stub: MII-based homePNA
PHYs tend to look like 10mbps PHYs with no autonegotiation. This allows
us to display the proper media type and link status however.
Diffstat (limited to 'sys/dev/mii')
-rw-r--r-- | sys/dev/mii/pnaphy.c | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/sys/dev/mii/pnaphy.c b/sys/dev/mii/pnaphy.c new file mode 100644 index 0000000..67cf59d --- /dev/null +++ b/sys/dev/mii/pnaphy.c @@ -0,0 +1,282 @@ +/* + * Copyright (c) 2000 Berkeley Software Design, Inc. + * Copyright (c) 1997, 1998, 1999, 2000 + * Bill Paul <wpaul@osd.bsdi.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. + * + * $FreeBSD$ + */ + +/* + * driver for homePNA PHYs + * This is really just a stub that allows us to identify homePNA-based + * transceicers and display the link status. MII-based homePNA PHYs + * only support one media type and no autonegotiation. If we were + * really clever, we could tweak some of the vendor-specific registers + * to optimize the link. + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/malloc.h> +#include <sys/socket.h> +#include <sys/errno.h> +#include <sys/module.h> +#include <sys/bus.h> + +#include <net/if.h> +#include <net/if_media.h> + +#include <machine/clock.h> + +#include <dev/mii/mii.h> +#include <dev/mii/miivar.h> +#include <dev/mii/miidevs.h> + +#include "miibus_if.h" + +#if !defined(lint) +static const char rcsid[] = + "$FreeBSD$"; +#endif + +static int pnaphy_probe __P((device_t)); +static int pnaphy_attach __P((device_t)); +static int pnaphy_detach __P((device_t)); + +static device_method_t pnaphy_methods[] = { + /* device interface */ + DEVMETHOD(device_probe, pnaphy_probe), + DEVMETHOD(device_attach, pnaphy_attach), + DEVMETHOD(device_detach, pnaphy_detach), + DEVMETHOD(device_shutdown, bus_generic_shutdown), + { 0, 0 } +}; + +static devclass_t pnaphy_devclass; + +static driver_t pnaphy_driver = { + "pnaphy", + pnaphy_methods, + sizeof(struct mii_softc) +}; + +DRIVER_MODULE(pnaphy, miibus, pnaphy_driver, pnaphy_devclass, 0, 0); + +int pnaphy_service __P((struct mii_softc *, struct mii_data *, int)); + +static int +pnaphy_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_AMD && + MII_MODEL(ma->mii_id2) == MII_MODEL_AMD_79c978) { + device_set_desc(dev, MII_STR_AMD_79c978); + return(0); + } + + return(ENXIO); +} + +static int +pnaphy_attach(dev) + device_t dev; +{ + struct mii_softc *sc; + struct mii_attach_args *ma; + struct mii_data *mii; + const char *sep = ""; + + 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 = pnaphy_service; + sc->mii_pdata = mii; + + mii->mii_instance++; + + sc->mii_flags |= MIIF_NOISOLATE; + +#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) +#define PRINT(s) printf("%s%s", sep, s); sep = ", " + + mii_phy_reset(sc); + + sc->mii_capabilities = + PHY_READ(sc, MII_BMSR) & ma->mii_capmask; + device_printf(dev, " "); + if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) + printf("no media present"); + else { + ADD(IFM_MAKEWORD(IFM_ETHER, IFM_homePNA, 0, sc->mii_inst), 0); + PRINT("HomePNA"); + } + ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), + BMCR_ISO); + + printf("\n"); + +#undef ADD +#undef PRINT + + MIIBUS_MEDIAINIT(sc->mii_dev); + + return(0); +} + +static int pnaphy_detach(dev) + device_t dev; +{ + struct mii_softc *sc; + struct mii_data *mii; + + sc = device_get_softc(dev); + mii = device_get_softc(device_get_parent(dev)); + sc->mii_dev = NULL; + LIST_REMOVE(sc, mii_list); + + return(0); +} + +int +pnaphy_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; + + 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: + case IFM_10_T: + case IFM_100_TX: + case IFM_100_T4: + return (EINVAL); + default: + /* + * BMCR data is stored in the ifmedia entry. + */ + PHY_WRITE(sc, MII_ANAR, + mii_anar(ife->ifm_media)); + PHY_WRITE(sc, MII_BMCR, ife->ifm_data); + } + 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); + + /* + * 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) + return (0); + + /* + * Only retry autonegotiation every 5 seconds. + */ + if (++sc->mii_ticks != 5) + return (0); + + sc->mii_ticks = 0; + mii_phy_reset(sc); + if (mii_phy_auto(sc, 0) == EJUSTRETURN) + return (0); + break; + } + + /* Update the media status. */ + ukphy_status(sc); + if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T) + mii->mii_media_active = IFM_ETHER|IFM_homePNA; + + /* 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); +} |