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Differential D32813 Diff 98938 sys/dev/mii/dp83867phy.c

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sys/dev/mii/dp83867phy.c

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2021 Alstom Group.
* Copyright (c) 2021 Semihalf.
*
* 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.
*
* 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.
*/
/*
* Driver for TI DP83867 Ethernet PHY
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/resource.h>
#include <sys/rman.h>
#include <sys/socket.h>
#include <machine/resource.h>
#include <net/if.h>
#include <net/if_media.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include "miidevs.h"
#include "miibus_if.h"
#define BIT(x) (1 << (x))
#define DP83867_PHYCR 0x10
#define DP83867_PHYSTS 0x11
#define DP83867_MICR 0x12
#define DP83867_ISR 0x13
#define DP83867_CFG3 0x1E
#define DP83867_CTRL 0x1F
#define DP83867_CFG4 0x31
#define DP83867_RGMIICTL 0x32
#define DP83867_STRP_STS1 0x6E
#define DP83867_STRP_STS2 0x6F
#define DP83867_PHYSTS_LINK_UP BIT(10)
#define DP83867_PHYSTS_ANEG_PENDING BIT(11)
#define DP83867_PHYSTS_FD BIT(13)
#define DP83867_PHYSTS_SPEED_MASK (BIT(15) | BIT(14))
#define DP83867_PHYSTS_SPEED_1000 BIT(15)
#define DP83867_PHYSTS_SPEED_100 BIT(14)
#define DP83867_PHYSTS_SPEED_10 0
#define DP83867_MICR_AN_ERR BIT(15)
#define DP83867_MICR_SPEED_CHG BIT(14)
#define DP83867_MICR_DP_MODE_CHG BIT(13)
#define DP83867_MICR_AN_CMPL BIT(11)
#define DP83867_MICR_LINK_CHG BIT(10)
#define DP83867_CFG3_INT_OE BIT(7)
#define DP83867_CFG4_TST_MODE1 BIT(7)
#define DP83867_CFG4_ANEG_MASK (BIT(5) | BIT(6))
#define DP83867_CFG4_ANEG_16MS (0 << 5)
#define BMSR_100_MASK (BMSR_100T4 | BMSR_100TXFDX | BMSR_100TXHDX | \
BMSR_100T2FDX | BMSR_100T2HDX)
static int dp_probe(device_t);
static int dp_attach(device_t);
static int dp_service(struct mii_softc*, struct mii_data*, int);
static void dp_status(struct mii_softc*);
struct dp83867_softc {
struct mii_softc mii_sc;
struct resource *irq_res;
void *irq_cookie;
};
static const struct mii_phydesc dpphys[] = {
MII_PHY_DESC(xxTI, DP83867)
};
static const struct mii_phy_funcs dpphy_funcs = {
dp_service,
dp_status,
mii_phy_reset
};
static void
dp_intr(void *arg)
{
struct mii_softc *sc = (struct mii_softc *)arg;
uint32_t status;
status = PHY_READ(sc, DP83867_ISR);
status &= PHY_READ(sc, DP83867_MICR);
if (!status)
return;
PHY_STATUS(sc);
mii_phy_update(sc, MII_MEDIACHG);
}
static int
dp_probe(device_t dev)
{
return (mii_phy_dev_probe(dev, dpphys, BUS_PROBE_DEFAULT));
}
static int
dp_attach(device_t dev)
{
struct dp83867_softc *sc;
struct mii_softc *mii_sc;
uint32_t value, maxspeed;
ssize_t size;
int rid, error;
sc = device_get_softc(dev);
mii_sc = &sc->mii_sc;
size = device_get_property(dev, "max-speed", &maxspeed, sizeof(maxspeed));
if (size <= 0)
maxspeed = 0;
mii_sc->mii_maxspeed = maxspeed;
mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &dpphy_funcs, 1);
rid = 0;
sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
if (sc->irq_res == NULL)
goto no_irq;
error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET | INTR_MPSAFE,
NULL, dp_intr, sc, &sc->irq_cookie);
if (error != 0) {
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
sc->irq_res = NULL;
goto no_irq;
}
/* Ack and unmask all relevant interrupts. */
(void)PHY_READ(mii_sc, DP83867_ISR);
value = DP83867_MICR_AN_ERR |
DP83867_MICR_SPEED_CHG |
DP83867_MICR_DP_MODE_CHG |
DP83867_MICR_AN_CMPL |
DP83867_MICR_LINK_CHG;
PHY_WRITE(mii_sc, DP83867_MICR, value);
value = PHY_READ(mii_sc, DP83867_CFG3);
value |= DP83867_CFG3_INT_OE;
PHY_WRITE(mii_sc, DP83867_CFG3, value);
no_irq:
/* Set autonegotation timeout to max possible value. */
value = PHY_READ(mii_sc, DP83867_CFG4);
value &= ~DP83867_CFG4_ANEG_MASK;
value &= ~DP83867_CFG4_TST_MODE1;
value |= DP83867_CFG4_ANEG_16MS;
PHY_WRITE(mii_sc, DP83867_CFG4, value);
return (0);
}
static int
dp_detach(device_t dev)
{
struct dp83867_softc *sc;
sc = device_get_softc(dev);
bus_teardown_intr(dev, sc->irq_res, sc->irq_cookie);
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
return (mii_phy_detach(dev));
}
static int
dp_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
{
switch (cmd) {
case MII_POLLSTAT:
break;
case MII_MEDIACHG:
mii_phy_setmedia(sc);
break;
case MII_TICK:
if (mii_phy_tick(sc) == EJUSTRETURN)
return (0);
break;
}
PHY_STATUS(sc);
mii_phy_update(sc, cmd);
return (0);
}
static void
dp_status(struct mii_softc *sc)
{
struct mii_data *mii;
int bmsr, bmcr, physts;
mii = sc->mii_pdata;
mii->mii_media_status = IFM_AVALID;
mii->mii_media_active = IFM_ETHER;
bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
physts = PHY_READ(sc, DP83867_PHYSTS);
if ((bmsr & BMSR_LINK) && (physts & DP83867_PHYSTS_LINK_UP))
mii->mii_media_status |= IFM_ACTIVE;
bmcr = PHY_READ(sc, MII_BMCR);
if (bmcr & BMCR_ISO) {
mii->mii_media_active |= IFM_NONE;
mii->mii_media_status = 0;
return;
}
if (bmcr & BMCR_LOOP)
mii->mii_media_active |= IFM_LOOP;
/* Autoneg in progress. */
if (!(physts & DP83867_PHYSTS_ANEG_PENDING)) {
mii->mii_media_active |= IFM_NONE;
return;
}
switch (physts & DP83867_PHYSTS_SPEED_MASK) {
case DP83867_PHYSTS_SPEED_1000:
mii->mii_media_active |= IFM_1000_T;
break;
case DP83867_PHYSTS_SPEED_100:
mii->mii_media_active |= IFM_100_TX;
break;
case DP83867_PHYSTS_SPEED_10:
mii->mii_media_active |= IFM_10_T;
break;
default:
mii->mii_media_active |= IFM_NONE;
break;
}
if (physts & DP83867_PHYSTS_FD)
mii->mii_media_active |= IFM_FDX;
else
mii->mii_media_active |= IFM_HDX;
}
static device_method_t dp_methods[] = {
DEVMETHOD(device_probe, dp_probe),
DEVMETHOD(device_attach, dp_attach),
DEVMETHOD(device_detach, dp_detach),
DEVMETHOD_END
};
static devclass_t dp_devclass;
static driver_t dp_driver = {
"dp83867phy",
dp_methods,
sizeof(struct dp83867_softc)
};
DRIVER_MODULE(dp83867phy, miibus, dp_driver, dp_devclass, 0, 0);