266 lines
6.4 KiB
C
266 lines
6.4 KiB
C
/*-
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* Copyright (c) 2006 Benno Rice. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Driver for the internal PHY on the SMSC LAN91C111.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/errno.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/malloc.h>
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#include <machine/bus.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <dev/mii/mii.h>
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#include <dev/mii/miivar.h>
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#include "miidevs.h"
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#include "miibus_if.h"
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static int smcphy_probe(device_t);
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static int smcphy_attach(device_t);
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static int smcphy_service(struct mii_softc *, struct mii_data *, int);
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static int smcphy_reset(struct mii_softc *);
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static void smcphy_auto(struct mii_softc *);
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static device_method_t smcphy_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, smcphy_probe),
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DEVMETHOD(device_attach, smcphy_attach),
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DEVMETHOD(device_detach, mii_phy_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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{ 0, 0 }
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};
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static devclass_t smcphy_devclass;
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static driver_t smcphy_driver = {
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"smcphy",
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smcphy_methods,
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sizeof(struct mii_softc)
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};
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DRIVER_MODULE(smcphy, miibus, smcphy_driver, smcphy_devclass, 0, 0);
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static int
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smcphy_probe(device_t dev)
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{
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struct mii_attach_args *ma;
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ma = device_get_ivars(dev);
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if (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_SMSC ||
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MII_MODEL(ma->mii_id2) != MII_MODEL_SMSC_LAN83C183)
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return (ENXIO);
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device_set_desc(dev, MII_STR_SMSC_LAN83C183);
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return (0);
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}
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static int
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smcphy_attach(device_t dev)
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{
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struct mii_softc *sc;
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struct mii_attach_args *ma;
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struct mii_data *mii;
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sc = device_get_softc(dev);
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ma = device_get_ivars(dev);
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sc->mii_dev = device_get_parent(dev);
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mii = ma->mii_data;
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LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
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sc->mii_inst = mii->mii_instance;
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sc->mii_phy = ma->mii_phyno;
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sc->mii_service = smcphy_service;
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sc->mii_pdata = mii;
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mii->mii_instance++;
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sc->mii_flags |= MIIF_NOISOLATE;
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if (smcphy_reset(sc) != 0) {
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device_printf(dev, "reset failed\n");
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}
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/* Mask interrupts, we poll instead. */
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PHY_WRITE(sc, 0x1e, 0xffc0);
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sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
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device_printf(dev, " ");
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mii_add_media(sc);
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printf("\n");
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MIIBUS_MEDIAINIT(sc->mii_dev);
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mii_phy_setmedia(sc);
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return (0);
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}
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static int
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smcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
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{
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struct ifmedia_entry *ife;
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int reg;
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ife = mii->mii_media.ifm_cur;
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switch (cmd) {
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case MII_POLLSTAT:
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/*
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* If we're not polling our PHY instance, just return.
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*/
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if (IFM_INST(ife->ifm_media) != sc->mii_inst)
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return (0);
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break;
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case MII_MEDIACHG:
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/*
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* If the media indicates a different PHY instance,
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* isolate ourselves.
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*/
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if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
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reg = PHY_READ(sc, MII_BMCR);
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PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
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return (0);
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}
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/*
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* If the interface is not up, don't do anything.
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*/
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if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
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break;
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switch (IFM_SUBTYPE(ife->ifm_media)) {
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case IFM_AUTO:
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smcphy_auto(sc);
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break;
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default:
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mii_phy_setmedia(sc);
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break;
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}
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break;
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case MII_TICK:
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/*
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* If we're not currently selected, just return.
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*/
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if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
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return (0);
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}
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if ((mii->mii_ifp->if_flags & IFF_UP) == 0) {
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return (0);
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}
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if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
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break;
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}
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/* I have no idea why BMCR_ISO gets set. */
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reg = PHY_READ(sc, MII_BMCR);
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if (reg & BMCR_ISO) {
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PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO);
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}
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reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
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if (reg & BMSR_LINK) {
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sc->mii_ticks = 0;
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break;
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}
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if (++sc->mii_ticks <= MII_ANEGTICKS) {
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break;
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}
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sc->mii_ticks = 0;
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if (smcphy_reset(sc) != 0) {
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device_printf(sc->mii_dev, "reset failed\n");
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}
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smcphy_auto(sc);
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break;
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}
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/* Update the media status. */
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ukphy_status(sc);
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/* Callback if something changed. */
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mii_phy_update(sc, cmd);
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return (0);
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}
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static int
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smcphy_reset(struct mii_softc *sc)
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{
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u_int bmcr;
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int timeout;
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PHY_WRITE(sc, MII_BMCR, BMCR_RESET);
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for (timeout = 2; timeout > 0; timeout--) {
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DELAY(50000);
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bmcr = PHY_READ(sc, MII_BMCR);
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if ((bmcr & BMCR_RESET) == 0)
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break;
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}
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if (bmcr & BMCR_RESET) {
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return (EIO);
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}
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PHY_WRITE(sc, MII_BMCR, 0x3000);
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return (0);
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}
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static void
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smcphy_auto(struct mii_softc *sc)
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{
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uint16_t anar;
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anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) |
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ANAR_CSMA;
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if (sc->mii_flags & MIIF_DOPAUSE)
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anar |= ANAR_FC;
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PHY_WRITE(sc, MII_ANAR, anar);
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/* Apparently this helps. */
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anar = PHY_READ(sc, MII_ANAR);
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PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
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}
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