freebsd-nq/sys/dev/etherswitch/arswitch/arswitch_phy.c
Rui Paulo efce3748f3 Revert r268543.
We should probably fix sys/gpio.h instead.
2014-07-12 06:23:42 +00:00

161 lines
4.3 KiB
C

/*-
* Copyright (c) 2011-2012 Stefan Bethke.
* Copyright (c) 2012 Adrian Chadd.
* 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, 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/errno.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <net/if.h>
#include <net/if_media.h>
#include <machine/bus.h>
#include <dev/iicbus/iic.h>
#include <dev/iicbus/iiconf.h>
#include <dev/iicbus/iicbus.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/etherswitch/mdio.h>
#include <dev/etherswitch/etherswitch.h>
#include <dev/etherswitch/arswitch/arswitchreg.h>
#include <dev/etherswitch/arswitch/arswitchvar.h>
#include <dev/etherswitch/arswitch/arswitch_reg.h>
#include <dev/etherswitch/arswitch/arswitch_phy.h>
#include "mdio_if.h"
#include "miibus_if.h"
#include "etherswitch_if.h"
#if defined(DEBUG)
static SYSCTL_NODE(_debug, OID_AUTO, arswitch, CTLFLAG_RD, 0, "arswitch");
#endif
/*
* access PHYs integrated into the switch chip through the switch's MDIO
* control register.
*/
int
arswitch_readphy(device_t dev, int phy, int reg)
{
struct arswitch_softc *sc;
uint32_t data = 0, ctrl;
int err, timeout;
uint32_t a;
sc = device_get_softc(dev);
ARSWITCH_LOCK_ASSERT(sc, MA_NOTOWNED);
if (phy < 0 || phy >= 32)
return (ENXIO);
if (reg < 0 || reg >= 32)
return (ENXIO);
if (AR8X16_IS_SWITCH(sc, AR8327))
a = AR8327_REG_MDIO_CTRL;
else
a = AR8X16_REG_MDIO_CTRL;
ARSWITCH_LOCK(sc);
err = arswitch_writereg_msb(dev, a,
AR8X16_MDIO_CTRL_BUSY | AR8X16_MDIO_CTRL_MASTER_EN |
AR8X16_MDIO_CTRL_CMD_READ |
(phy << AR8X16_MDIO_CTRL_PHY_ADDR_SHIFT) |
(reg << AR8X16_MDIO_CTRL_REG_ADDR_SHIFT));
DEVERR(dev, err, "arswitch_readphy()=%d: phy=%d.%02x\n", phy, reg);
if (err != 0)
goto fail;
for (timeout = 100; timeout--; ) {
ctrl = arswitch_readreg_msb(dev, a);
if ((ctrl & AR8X16_MDIO_CTRL_BUSY) == 0)
break;
}
if (timeout < 0)
goto fail;
data = arswitch_readreg_lsb(dev, a) &
AR8X16_MDIO_CTRL_DATA_MASK;
ARSWITCH_UNLOCK(sc);
return (data);
fail:
ARSWITCH_UNLOCK(sc);
return (-1);
}
int
arswitch_writephy(device_t dev, int phy, int reg, int data)
{
struct arswitch_softc *sc;
uint32_t ctrl;
int err, timeout;
uint32_t a;
sc = device_get_softc(dev);
ARSWITCH_LOCK_ASSERT(sc, MA_NOTOWNED);
if (reg < 0 || reg >= 32)
return (ENXIO);
if (AR8X16_IS_SWITCH(sc, AR8327))
a = AR8327_REG_MDIO_CTRL;
else
a = AR8X16_REG_MDIO_CTRL;
ARSWITCH_LOCK(sc);
err = arswitch_writereg(dev, a,
AR8X16_MDIO_CTRL_BUSY |
AR8X16_MDIO_CTRL_MASTER_EN |
AR8X16_MDIO_CTRL_CMD_WRITE |
(phy << AR8X16_MDIO_CTRL_PHY_ADDR_SHIFT) |
(reg << AR8X16_MDIO_CTRL_REG_ADDR_SHIFT) |
(data & AR8X16_MDIO_CTRL_DATA_MASK));
if (err != 0)
goto out;
for (timeout = 100; timeout--; ) {
ctrl = arswitch_readreg(dev, a);
if ((ctrl & AR8X16_MDIO_CTRL_BUSY) == 0)
break;
}
if (timeout < 0)
err = EIO;
out:
DEVERR(dev, err, "arswitch_writephy()=%d: phy=%d.%02x\n", phy, reg);
ARSWITCH_UNLOCK(sc);
return (err);
}