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Add RTEMS legacy MII support
This commit is contained in:
Sebastian Huber
254
rtemsbsd/rtems/rtems_mii_ioctl_kern.c
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254
rtemsbsd/rtems/rtems_mii_ioctl_kern.c
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/* Simple (default) implementation for SIOCGIFMEDIA/SIOCSIFMEDIA
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* to be used by ethernet drivers [from their ioctl].
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*
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* KERNEL PART (support for drivers)
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*
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* NOTE: This much simpler than the BSD ifmedia API
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*/
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/*
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* Authorship
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* ----------
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* This software was created by
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* Till Straumann <strauman@slac.stanford.edu>, 2005,
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* Stanford Linear Accelerator Center, Stanford University.
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*
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* Acknowledgement of sponsorship
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* ------------------------------
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* This software was produced by
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* the Stanford Linear Accelerator Center, Stanford University,
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* under Contract DE-AC03-76SFO0515 with the Department of Energy.
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*
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* Government disclaimer of liability
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* ----------------------------------
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* Neither the United States nor the United States Department of Energy,
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* nor any of their employees, makes any warranty, express or implied, or
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* assumes any legal liability or responsibility for the accuracy,
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* completeness, or usefulness of any data, apparatus, product, or process
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* disclosed, or represents that its use would not infringe privately owned
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* rights.
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*
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* Stanford disclaimer of liability
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* --------------------------------
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* Stanford University makes no representations or warranties, express or
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* implied, nor assumes any liability for the use of this software.
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*
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* Stanford disclaimer of copyright
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* --------------------------------
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* Stanford University, owner of the copyright, hereby disclaims its
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* copyright and all other rights in this software. Hence, anyone may
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* freely use it for any purpose without restriction.
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*
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* Maintenance of notices
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* ----------------------
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* In the interest of clarity regarding the origin and status of this
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* SLAC software, this and all the preceding Stanford University notices
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* are to remain affixed to any copy or derivative of this software made
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* or distributed by the recipient and are to be affixed to any copy of
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* software made or distributed by the recipient that contains a copy or
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* derivative of this software.
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*
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* ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03
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*/
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/* include first to avoid 'malloc' clash with rtems_bsdnet_malloc() hack */
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#include <machine/rtems-bsd-kernel-space.h>
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#include <rtems/bsd/sys/param.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <rtems/rtems_mii_ioctl.h>
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#include <errno.h>
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#define DEBUG
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#ifndef MII_1000TCR
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#define MII_1000TCR MII_100T2CR
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#endif
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#ifndef MII_1000TSR
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#define MII_1000TSR MII_100T2SR
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#endif
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int
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rtems_mii_ioctl (struct rtems_mdio_info *info, void *uarg, uint32_t cmd,
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int *media)
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{
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uint32_t bmcr, bmsr, aner, bmcr2 = 0, bmsr2 = 0, anar, lpar;
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int phy = IFM_INST (*media);
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uint32_t tmp;
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int subtype = 0, options = 0;
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switch (cmd) {
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default:
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return EINVAL;
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#ifdef DEBUG
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case 0:
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#endif
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case SIOCGIFMEDIA:
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if (info->mdio_r (phy, uarg, MII_BMCR, &bmcr))
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return EINVAL;
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/* read BMSR twice to clear latched link status low */
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if (info->mdio_r (phy, uarg, MII_BMSR, &bmsr))
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return EINVAL;
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if (info->mdio_r (phy, uarg, MII_BMSR, &bmsr))
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return EINVAL;
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if (info->mdio_r (phy, uarg, MII_ANER, &aner))
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return EINVAL;
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if (info->has_gmii) {
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if (info->mdio_r (phy, uarg, MII_1000TCR, &bmcr2))
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return EINVAL;
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if (info->mdio_r (phy, uarg, MII_1000TSR, &bmsr2))
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return EINVAL;
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}
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/* link status */
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if (BMSR_LINK & bmsr)
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options |= IFM_LINK_OK;
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/* do we have autonegotiation disabled ? */
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if (!(BMCR_AUTOEN & bmcr)) {
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options |= IFM_ANEG_DIS;
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/* duplex is enforced */
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options |= BMCR_FDX & bmcr ? IFM_FDX : IFM_HDX;
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/* determine speed */
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switch (BMCR_SPEED (bmcr)) {
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case BMCR_S10:
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subtype = IFM_10_T;
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break;
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case BMCR_S100:
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subtype = IFM_100_TX;
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break;
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case BMCR_S1000:
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subtype = IFM_1000_T;
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break;
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default:
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return ENOTSUP; /* ?? */
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}
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} else if (!(BMSR_LINK & bmsr) || !(BMSR_ACOMP & bmsr)) {
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subtype = IFM_NONE;
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} else {
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/* everything ok on our side */
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if ( ! (ANER_LPAN & aner) ) {
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/* Link partner doesn't autonegotiate --> our settings are the
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* result of 'parallel detect' (in particular: duplex status is HALF
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* according to the standard!).
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* Let them know that something's fishy...
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*/
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options |= IFM_ANEG_DIS;
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}
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tmp = ((bmcr2 << 2) & bmsr2) & (GTSR_LP_1000THDX | GTSR_LP_1000TFDX);
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if (tmp) {
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if (GTSR_LP_1000TFDX & tmp)
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options |= IFM_FDX;
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subtype = IFM_1000_T;
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} else {
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if (info->mdio_r (phy, uarg, MII_ANAR, &anar))
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return EINVAL;
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if (info->mdio_r (phy, uarg, MII_ANLPAR, &lpar))
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return EINVAL;
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if (ANLPAR_ACK & lpar) {
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/* this is a negotiated link; otherwise we merely detect the partner's ability */
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}
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tmp = anar & lpar;
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if (ANLPAR_TX_FD & tmp) {
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options |= IFM_FDX;
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subtype = IFM_100_TX;
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} else if (ANLPAR_T4 & tmp) {
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subtype = IFM_100_T4;
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} else if (ANLPAR_TX & tmp) {
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subtype = IFM_100_TX;
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} else if (ANLPAR_10_FD & tmp) {
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options |= IFM_FDX;
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subtype = IFM_10_T;
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} else {
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subtype = IFM_10_T;
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}
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}
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}
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*media = IFM_MAKEWORD (IFM_ETHER, subtype, options, phy);
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break;
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#ifdef DEBUG
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case 1:
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#endif
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case SIOCSIFMEDIA:
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if (IFM_ETHER != IFM_TYPE (*media))
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return EINVAL;
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if (info->mdio_r (phy, uarg, MII_BMSR, &bmsr))
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return EINVAL;
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tmp = (IFM_FDX & *media);
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switch (IFM_SUBTYPE (*media)) {
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default:
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return ENOTSUP;
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case IFM_AUTO:
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bmcr = BMCR_AUTOEN | BMCR_STARTNEG;
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tmp = 0;
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break;
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case IFM_1000_T:
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if (!info->has_gmii)
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return ENOTSUP;
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if (info->mdio_r (phy, uarg, MII_EXTSR, &bmsr2))
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return EINVAL;
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if (!(bmsr2 & (tmp ? EXTSR_1000TFDX : EXTSR_1000THDX)))
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return EOPNOTSUPP;
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/* NOTE: gige standard demands auto-negotiation for gige links.
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* Disabling autoneg did NOT work on the PHYs I tried
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* (BCM5421S, intel 82540).
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* I've seen drivers that simply change what they advertise
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* to the desired gig mode and re-negotiate.
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* We could do that here, too, but we don't see the point -
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* If autoneg works fine then we can as well use it.
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*/
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bmcr = BMCR_S1000;
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break;
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case IFM_100_TX:
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if (!(bmsr & (tmp ? BMSR_100TXFDX : BMSR_100TXHDX)))
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return EOPNOTSUPP;
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bmcr = BMCR_S100;
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break;
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case IFM_10_T:
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if (!(bmsr & (tmp ? BMSR_10TFDX : BMSR_10THDX)))
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return EOPNOTSUPP;
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bmcr = BMCR_S10;
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break;
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}
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if (tmp)
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bmcr |= BMCR_FDX;
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if (info->mdio_w (phy, uarg, MII_BMCR, bmcr))
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return EINVAL;
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/* TODO: should we adapt advertised capabilites ? */
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break;
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}
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return 0;
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}
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