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freebsd-dev/sys/dev/mii/ip1000phy.c
Marcel Moolenaar 62d76917b8 Introduce a procedural interface to the ifnet structure. The new 
interface allows the ifnet structure to be defined as an opaque
type in NIC drivers.  This then allows the ifnet structure to be
changed without a need to change or recompile NIC drivers.

Put differently, NIC drivers can be written and compiled once and
be used with different network stack implementations, provided of
course that those network stack implementations have an API and
ABI compatible interface.

This commit introduces the 'if_t' type to replace 'struct ifnet *'
as the type of a network interface. The 'if_t' type is defined as
'void *' to enable the compiler to perform type conversion to
'struct ifnet *' and vice versa where needed and without warnings.
The functions that implement the API are the only functions that
need to have an explicit cast.

The MII code has been converted to use the driver API to avoid
unnecessary code churn. Code churn comes from having to work with
both converted and unconverted drivers in correlation with having
callback functions that take an interface. By converting the MII
code first, the callback functions can be defined so that the
compiler will perform the typecasts automatically.

As soon as all drivers have been converted, the if_t type can be
redefined as needed and the API functions can be fix to not need
an explicit cast.

The immediate benefactors of this change are:
1.  Juniper Networks - The network stack implementation in Junos
    is entirely different from FreeBSD's one and this change
    allows Juniper to build "stock" NIC drivers that can be used
    in combination with both the FreeBSD and Junos stacks.
2.  FreeBSD - This change opens the door towards changing ifnet
    and implementing new features and optimizations in the network
    stack without it requiring a change in the many NIC drivers
    FreeBSD has.

Submitted by:	Anuranjan Shukla <anshukla@juniper.net>
Reviewed by:	glebius@
Obtained from:	Juniper Networks, Inc.
2014-06-02 17:54:39 +00:00

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/*-
* Copyright (c) 2006, Pyun YongHyeon <yongari@FreeBSD.org>
* 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 unmodified, 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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("$FreeBSD$");
/*
* Driver for the IC Plus IP1000A/IP1001 10/100/1000 PHY.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/socket.h>
#include <sys/taskqueue.h>
#include <sys/bus.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_media.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include "miidevs.h"
#include <dev/mii/ip1000phyreg.h>
#include "miibus_if.h"
#include <machine/bus.h>
#include <dev/stge/if_stgereg.h>
static int ip1000phy_probe(device_t);
static int ip1000phy_attach(device_t);
static device_method_t ip1000phy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, ip1000phy_probe),
DEVMETHOD(device_attach, ip1000phy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD_END
};
static devclass_t ip1000phy_devclass;
static driver_t ip1000phy_driver = {
"ip1000phy",
ip1000phy_methods,
sizeof(struct mii_softc)
};
DRIVER_MODULE(ip1000phy, miibus, ip1000phy_driver, ip1000phy_devclass, 0, 0);
static int ip1000phy_service(struct mii_softc *, struct mii_data *, int);
static void ip1000phy_status(struct mii_softc *);
static void ip1000phy_reset(struct mii_softc *);
static int ip1000phy_mii_phy_auto(struct mii_softc *, int);
static const struct mii_phydesc ip1000phys[] = {
MII_PHY_DESC(xxICPLUS, IP1000A),
MII_PHY_DESC(xxICPLUS, IP1001),
MII_PHY_END
};
static const struct mii_phy_funcs ip1000phy_funcs = {
ip1000phy_service,
ip1000phy_status,
ip1000phy_reset
};
static int
ip1000phy_probe(device_t dev)
{
return (mii_phy_dev_probe(dev, ip1000phys, BUS_PROBE_DEFAULT));
}
static int
ip1000phy_attach(device_t dev)
{
struct mii_attach_args *ma;
u_int flags;
ma = device_get_ivars(dev);
flags = MIIF_NOISOLATE | MIIF_NOMANPAUSE;
if (MII_MODEL(ma->mii_id2) == MII_MODEL_xxICPLUS_IP1000A &&
strcmp(if_getdname(ma->mii_data->mii_ifp), "stge") == 0 &&
(miibus_get_flags(dev) & MIIF_MACPRIV0) != 0)
flags |= MIIF_PHYPRIV0;
mii_phy_dev_attach(dev, flags, &ip1000phy_funcs, 1);
return (0);
}
static int
ip1000phy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
uint32_t gig, reg, speed;
switch (cmd) {
case MII_POLLSTAT:
break;
case MII_MEDIACHG:
PHY_RESET(sc);
switch (IFM_SUBTYPE(ife->ifm_media)) {
case IFM_AUTO:
(void)ip1000phy_mii_phy_auto(sc, ife->ifm_media);
goto done;
case IFM_1000_T:
/*
* XXX
* Manual 1000baseT setting doesn't seem to work.
*/
speed = IP1000PHY_BMCR_1000;
break;
case IFM_100_TX:
speed = IP1000PHY_BMCR_100;
break;
case IFM_10_T:
speed = IP1000PHY_BMCR_10;
break;
default:
return (EINVAL);
}
if ((ife->ifm_media & IFM_FDX) != 0) {
speed |= IP1000PHY_BMCR_FDX;
gig = IP1000PHY_1000CR_1000T_FDX;
} else
gig = IP1000PHY_1000CR_1000T;
if (IFM_SUBTYPE(ife->ifm_media) == IFM_1000_T) {
gig |=
IP1000PHY_1000CR_MASTER | IP1000PHY_1000CR_MANUAL;
if ((ife->ifm_media & IFM_ETH_MASTER) != 0)
gig |= IP1000PHY_1000CR_MMASTER;
} else
gig = 0;
PHY_WRITE(sc, IP1000PHY_MII_1000CR, gig);
PHY_WRITE(sc, IP1000PHY_MII_BMCR, speed);
done:
break;
case MII_TICK:
/*
* Only used for autonegotiation.
*/
if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) {
sc->mii_ticks = 0;
break;
}
/*
* check for link.
*/
reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
if (reg & BMSR_LINK) {
sc->mii_ticks = 0;
break;
}
/* Announce link loss right after it happens */
if (sc->mii_ticks++ == 0)
break;
/*
* Only retry autonegotiation every mii_anegticks seconds.
*/
if (sc->mii_ticks <= sc->mii_anegticks)
break;
sc->mii_ticks = 0;
ip1000phy_mii_phy_auto(sc, ife->ifm_media);
break;
}
/* Update the media status. */
PHY_STATUS(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
static void
ip1000phy_status(struct mii_softc *sc)
{
struct mii_data *mii = sc->mii_pdata;
uint32_t bmsr, bmcr, stat;
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
bmsr = PHY_READ(sc, IP1000PHY_MII_BMSR) |
PHY_READ(sc, IP1000PHY_MII_BMSR);
if ((bmsr & IP1000PHY_BMSR_LINK) != 0)
mii->mii_media_status |= IFM_ACTIVE;
bmcr = PHY_READ(sc, IP1000PHY_MII_BMCR);
if ((bmcr & IP1000PHY_BMCR_LOOP) != 0)
mii->mii_media_active |= IFM_LOOP;
if ((bmcr & IP1000PHY_BMCR_AUTOEN) != 0) {
if ((bmsr & IP1000PHY_BMSR_ANEGCOMP) == 0) {
/* Erg, still trying, I guess... */
mii->mii_media_active |= IFM_NONE;
return;
}
}
if (sc->mii_mpd_model == MII_MODEL_xxICPLUS_IP1001) {
stat = PHY_READ(sc, IP1000PHY_LSR);
switch (stat & IP1000PHY_LSR_SPEED_MASK) {
case IP1000PHY_LSR_SPEED_10:
mii->mii_media_active |= IFM_10_T;
break;
case IP1000PHY_LSR_SPEED_100:
mii->mii_media_active |= IFM_100_TX;
break;
case IP1000PHY_LSR_SPEED_1000:
mii->mii_media_active |= IFM_1000_T;
break;
default:
mii->mii_media_active |= IFM_NONE;
return;
}
if ((stat & IP1000PHY_LSR_FULL_DUPLEX) != 0)
mii->mii_media_active |= IFM_FDX;
else
mii->mii_media_active |= IFM_HDX;
} else {
stat = PHY_READ(sc, STGE_PhyCtrl);
switch (PC_LinkSpeed(stat)) {
case PC_LinkSpeed_Down:
mii->mii_media_active |= IFM_NONE;
return;
case PC_LinkSpeed_10:
mii->mii_media_active |= IFM_10_T;
break;
case PC_LinkSpeed_100:
mii->mii_media_active |= IFM_100_TX;
break;
case PC_LinkSpeed_1000:
mii->mii_media_active |= IFM_1000_T;
break;
default:
mii->mii_media_active |= IFM_NONE;
return;
}
if ((stat & PC_PhyDuplexStatus) != 0)
mii->mii_media_active |= IFM_FDX;
else
mii->mii_media_active |= IFM_HDX;
}
if ((mii->mii_media_active & IFM_FDX) != 0)
mii->mii_media_active |= mii_phy_flowstatus(sc);
if ((mii->mii_media_active & IFM_1000_T) != 0) {
stat = PHY_READ(sc, IP1000PHY_MII_1000SR);
if ((stat & IP1000PHY_1000SR_MASTER) != 0)
mii->mii_media_active |= IFM_ETH_MASTER;
}
}
static int
ip1000phy_mii_phy_auto(struct mii_softc *sc, int media)
{
uint32_t reg;
reg = 0;
if (sc->mii_mpd_model == MII_MODEL_xxICPLUS_IP1001) {
reg = PHY_READ(sc, IP1000PHY_MII_ANAR);
reg &= ~(IP1000PHY_ANAR_PAUSE | IP1000PHY_ANAR_APAUSE);
reg |= IP1000PHY_ANAR_NP;
}
reg |= IP1000PHY_ANAR_10T | IP1000PHY_ANAR_10T_FDX |
IP1000PHY_ANAR_100TX | IP1000PHY_ANAR_100TX_FDX;
if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0)
reg |= IP1000PHY_ANAR_PAUSE | IP1000PHY_ANAR_APAUSE;
PHY_WRITE(sc, IP1000PHY_MII_ANAR, reg | IP1000PHY_ANAR_CSMA);
reg = IP1000PHY_1000CR_1000T | IP1000PHY_1000CR_1000T_FDX;
if (sc->mii_mpd_model != MII_MODEL_xxICPLUS_IP1001)
reg |= IP1000PHY_1000CR_MASTER;
PHY_WRITE(sc, IP1000PHY_MII_1000CR, reg);
PHY_WRITE(sc, IP1000PHY_MII_BMCR, (IP1000PHY_BMCR_FDX |
IP1000PHY_BMCR_AUTOEN | IP1000PHY_BMCR_STARTNEG));
return (EJUSTRETURN);
}
static void
ip1000phy_load_dspcode(struct mii_softc *sc)
{
PHY_WRITE(sc, 31, 0x0001);
PHY_WRITE(sc, 27, 0x01e0);
PHY_WRITE(sc, 31, 0x0002);
PHY_WRITE(sc, 27, 0xeb8e);
PHY_WRITE(sc, 31, 0x0000);
PHY_WRITE(sc, 30, 0x005e);
PHY_WRITE(sc, 9, 0x0700);
DELAY(50);
}
static void
ip1000phy_reset(struct mii_softc *sc)
{
uint32_t reg;
mii_phy_reset(sc);
/* clear autoneg/full-duplex as we don't want it after reset */
reg = PHY_READ(sc, IP1000PHY_MII_BMCR);
reg &= ~(IP1000PHY_BMCR_AUTOEN | IP1000PHY_BMCR_FDX);
PHY_WRITE(sc, MII_BMCR, reg);
if ((sc->mii_flags & MIIF_PHYPRIV0) != 0)
ip1000phy_load_dspcode(sc);
}
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