freebsd-dev/sys/dev/mii/mii.c
2008-08-23 07:46:58 +00:00

419 lines
10 KiB
C

/* $NetBSD: mii.c,v 1.12 1999/08/03 19:41:49 drochner Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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 the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* MII bus layer, glues MII-capable network interface drivers to sharable
* PHY drivers. This exports an interface compatible with BSD/OS 3.0's,
* plus some NetBSD extensions.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/route.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
MODULE_VERSION(miibus, 1);
#include "miibus_if.h"
static int miibus_print_child(device_t dev, device_t child);
static int miibus_child_location_str(device_t bus, device_t child, char *buf,
size_t buflen);
static int miibus_child_pnpinfo_str(device_t bus, device_t child, char *buf,
size_t buflen);
static int miibus_readreg(device_t, int, int);
static int miibus_writereg(device_t, int, int, int);
static void miibus_statchg(device_t);
static void miibus_linkchg(device_t);
static void miibus_mediainit(device_t);
static device_method_t miibus_methods[] = {
/* device interface */
DEVMETHOD(device_probe, miibus_probe),
DEVMETHOD(device_attach, miibus_attach),
DEVMETHOD(device_detach, miibus_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
/* bus interface */
DEVMETHOD(bus_print_child, miibus_print_child),
DEVMETHOD(bus_driver_added, bus_generic_driver_added),
DEVMETHOD(bus_child_pnpinfo_str, miibus_child_pnpinfo_str),
DEVMETHOD(bus_child_location_str, miibus_child_location_str),
/* MII interface */
DEVMETHOD(miibus_readreg, miibus_readreg),
DEVMETHOD(miibus_writereg, miibus_writereg),
DEVMETHOD(miibus_statchg, miibus_statchg),
DEVMETHOD(miibus_linkchg, miibus_linkchg),
DEVMETHOD(miibus_mediainit, miibus_mediainit),
{ 0, 0 }
};
devclass_t miibus_devclass;
driver_t miibus_driver = {
"miibus",
miibus_methods,
sizeof(struct mii_data)
};
struct miibus_ivars {
ifm_change_cb_t ifmedia_upd;
ifm_stat_cb_t ifmedia_sts;
};
/*
* Helper function used by network interface drivers, attaches PHYs
* to the network interface driver parent.
*/
int
miibus_probe(device_t dev)
{
struct mii_attach_args ma, *args;
struct mii_data *mii;
device_t child = NULL, parent;
int bmsr, capmask = 0xFFFFFFFF;
mii = device_get_softc(dev);
parent = device_get_parent(dev);
LIST_INIT(&mii->mii_phys);
for (ma.mii_phyno = 0; ma.mii_phyno < MII_NPHY; ma.mii_phyno++) {
/*
* Check to see if there is a PHY at this address. Note,
* many braindead PHYs report 0/0 in their ID registers,
* so we test for media in the BMSR.
*/
bmsr = MIIBUS_READREG(parent, ma.mii_phyno, MII_BMSR);
if (bmsr == 0 || bmsr == 0xffff ||
(bmsr & (BMSR_EXTSTAT|BMSR_MEDIAMASK)) == 0) {
/* Assume no PHY at this address. */
continue;
}
/*
* Extract the IDs. Braindead PHYs will be handled by
* the `ukphy' driver, as we have no ID information to
* match on.
*/
ma.mii_id1 = MIIBUS_READREG(parent, ma.mii_phyno,
MII_PHYIDR1);
ma.mii_id2 = MIIBUS_READREG(parent, ma.mii_phyno,
MII_PHYIDR2);
ma.mii_data = mii;
ma.mii_capmask = capmask;
args = malloc(sizeof(struct mii_attach_args),
M_DEVBUF, M_NOWAIT);
bcopy((char *)&ma, (char *)args, sizeof(ma));
child = device_add_child(dev, NULL, -1);
device_set_ivars(child, args);
}
if (child == NULL)
return(ENXIO);
device_set_desc(dev, "MII bus");
return(0);
}
int
miibus_attach(device_t dev)
{
struct miibus_ivars *ivars;
struct mii_data *mii;
mii = device_get_softc(dev);
/*
* Note that each NIC's softc must start with an ifnet pointer.
* XXX: EVIL HACK!
*/
mii->mii_ifp = *(struct ifnet**)device_get_softc(device_get_parent(dev));
ivars = device_get_ivars(dev);
ifmedia_init(&mii->mii_media, IFM_IMASK, ivars->ifmedia_upd,
ivars->ifmedia_sts);
bus_generic_attach(dev);
return(0);
}
int
miibus_detach(device_t dev)
{
struct mii_data *mii;
bus_generic_detach(dev);
mii = device_get_softc(dev);
ifmedia_removeall(&mii->mii_media);
mii->mii_ifp = NULL;
return(0);
}
static int
miibus_print_child(device_t dev, device_t child)
{
struct mii_attach_args *ma;
int retval;
ma = device_get_ivars(child);
retval = bus_print_child_header(dev, child);
retval += printf(" PHY %d", ma->mii_phyno);
retval += bus_print_child_footer(dev, child);
return (retval);
}
static int
miibus_child_pnpinfo_str(device_t bus, device_t child, char *buf,
size_t buflen)
{
struct mii_attach_args *maa = device_get_ivars(child);
snprintf(buf, buflen, "oui=0x%x model=0x%x rev=0x%x",
MII_OUI(maa->mii_id1, maa->mii_id2),
MII_MODEL(maa->mii_id2), MII_REV(maa->mii_id2));
return (0);
}
static int
miibus_child_location_str(device_t bus, device_t child, char *buf,
size_t buflen)
{
struct mii_attach_args *maa = device_get_ivars(child);
snprintf(buf, buflen, "phyno=%d", maa->mii_phyno);
return (0);
}
static int
miibus_readreg(device_t dev, int phy, int reg)
{
device_t parent;
parent = device_get_parent(dev);
return(MIIBUS_READREG(parent, phy, reg));
}
static int
miibus_writereg(device_t dev, int phy, int reg, int data)
{
device_t parent;
parent = device_get_parent(dev);
return(MIIBUS_WRITEREG(parent, phy, reg, data));
}
static void
miibus_statchg(device_t dev)
{
device_t parent;
struct mii_data *mii;
struct ifnet *ifp;
parent = device_get_parent(dev);
MIIBUS_STATCHG(parent);
mii = device_get_softc(dev);
/*
* Note that each NIC's softc must start with an ifnet pointer.
* XXX: EVIL HACK!
*/
ifp = *(struct ifnet **)device_get_softc(parent);
ifp->if_baudrate = ifmedia_baudrate(mii->mii_media_active);
return;
}
static void
miibus_linkchg(device_t dev)
{
struct mii_data *mii;
device_t parent;
int link_state;
parent = device_get_parent(dev);
MIIBUS_LINKCHG(parent);
mii = device_get_softc(dev);
if (mii->mii_media_status & IFM_AVALID) {
if (mii->mii_media_status & IFM_ACTIVE)
link_state = LINK_STATE_UP;
else
link_state = LINK_STATE_DOWN;
} else
link_state = LINK_STATE_UNKNOWN;
/*
* Note that each NIC's softc must start with an ifnet pointer.
* XXX: EVIL HACK!
*/
if_link_state_change(*(struct ifnet**)device_get_softc(parent), link_state);
}
static void
miibus_mediainit(device_t dev)
{
struct mii_data *mii;
struct ifmedia_entry *m;
int media = 0;
/* Poke the parent in case it has any media of its own to add. */
MIIBUS_MEDIAINIT(device_get_parent(dev));
mii = device_get_softc(dev);
LIST_FOREACH(m, &mii->mii_media.ifm_list, ifm_list) {
media = m->ifm_media;
if (media == (IFM_ETHER|IFM_AUTO))
break;
}
ifmedia_set(&mii->mii_media, media);
return;
}
int
mii_phy_probe(device_t dev, device_t *child, ifm_change_cb_t ifmedia_upd,
ifm_stat_cb_t ifmedia_sts)
{
struct miibus_ivars *ivars;
int bmsr, i;
ivars = malloc(sizeof(*ivars), M_DEVBUF, M_NOWAIT);
if (ivars == NULL)
return (ENOMEM);
ivars->ifmedia_upd = ifmedia_upd;
ivars->ifmedia_sts = ifmedia_sts;
*child = device_add_child(dev, "miibus", -1);
device_set_ivars(*child, ivars);
for (i = 0; i < MII_NPHY; i++) {
bmsr = MIIBUS_READREG(dev, i, MII_BMSR);
if (bmsr == 0 || bmsr == 0xffff ||
(bmsr & (BMSR_EXTSTAT|BMSR_MEDIAMASK)) == 0) {
/* Assume no PHY at this address. */
continue;
} else
break;
}
if (i == MII_NPHY) {
device_delete_child(dev, *child);
*child = NULL;
return(ENXIO);
}
bus_generic_attach(dev);
return(0);
}
/*
* Media changed; notify all PHYs.
*/
int
mii_mediachg(struct mii_data *mii)
{
struct mii_softc *child;
int rv;
mii->mii_media_status = 0;
mii->mii_media_active = IFM_NONE;
LIST_FOREACH(child, &mii->mii_phys, mii_list) {
rv = (*child->mii_service)(child, mii, MII_MEDIACHG);
if (rv)
return (rv);
}
return (0);
}
/*
* Call the PHY tick routines, used during autonegotiation.
*/
void
mii_tick(struct mii_data *mii)
{
struct mii_softc *child;
LIST_FOREACH(child, &mii->mii_phys, mii_list)
(void) (*child->mii_service)(child, mii, MII_TICK);
}
/*
* Get media status from PHYs.
*/
void
mii_pollstat(struct mii_data *mii)
{
struct mii_softc *child;
mii->mii_media_status = 0;
mii->mii_media_active = IFM_NONE;
LIST_FOREACH(child, &mii->mii_phys, mii_list)
(void) (*child->mii_service)(child, mii, MII_POLLSTAT);
}
/*
* Inform the PHYs that the interface is down.
*/
void
mii_down(struct mii_data *mii)
{
struct mii_softc *child;
LIST_FOREACH(child, &mii->mii_phys, mii_list)
mii_phy_down(child);
}