diff options
Diffstat (limited to 'sys/dev/etherswitch/arswitch/arswitch_phy.c')
| -rw-r--r-- | sys/dev/etherswitch/arswitch/arswitch_phy.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/sys/dev/etherswitch/arswitch/arswitch_phy.c b/sys/dev/etherswitch/arswitch/arswitch_phy.c new file mode 100644 index 000000000000..68cf365fd0f5 --- /dev/null +++ b/sys/dev/etherswitch/arswitch/arswitch_phy.c @@ -0,0 +1,216 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * 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. + */ + +#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/mdio/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" + +/* + * Access PHYs integrated into the switch by going direct + * to the PHY space itself, rather than through the switch + * MDIO register. + */ +int +arswitch_readphy_external(device_t dev, int phy, int reg) +{ + int ret; + struct arswitch_softc *sc; + + sc = device_get_softc(dev); + + ARSWITCH_LOCK(sc); + ret = (MDIO_READREG(device_get_parent(dev), phy, reg)); + DPRINTF(sc, ARSWITCH_DBG_PHYIO, + "%s: phy=0x%08x, reg=0x%08x, ret=0x%08x\n", + __func__, phy, reg, ret); + ARSWITCH_UNLOCK(sc); + + return (ret); +} + +int +arswitch_writephy_external(device_t dev, int phy, int reg, int data) +{ + struct arswitch_softc *sc; + + sc = device_get_softc(dev); + + ARSWITCH_LOCK(sc); + (void) MDIO_WRITEREG(device_get_parent(dev), phy, + reg, data); + DPRINTF(sc, ARSWITCH_DBG_PHYIO, + "%s: phy=0x%08x, reg=0x%08x, data=0x%08x\n", + __func__, phy, reg, data); + ARSWITCH_UNLOCK(sc); + + return (0); +} + +/* + * Access PHYs integrated into the switch chip through the switch's MDIO + * control register. + */ +int +arswitch_readphy_internal(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) { + DPRINTF(sc, ARSWITCH_DBG_ANY, + "arswitch_readphy(): phy=%d.%02x; timeout=%d\n", + phy, reg, timeout); + goto fail; + } + data = arswitch_readreg_lsb(dev, a) & + AR8X16_MDIO_CTRL_DATA_MASK; + ARSWITCH_UNLOCK(sc); + + DPRINTF(sc, ARSWITCH_DBG_PHYIO, + "%s: phy=0x%08x, reg=0x%08x, ret=0x%08x\n", + __func__, phy, reg, data); + + return (data); + +fail: + ARSWITCH_UNLOCK(sc); + + DPRINTF(sc, ARSWITCH_DBG_PHYIO, + "%s: phy=0x%08x, reg=0x%08x, fail; err=%d\n", + __func__, phy, reg, err); + + return (-1); +} + +int +arswitch_writephy_internal(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; + + DPRINTF(sc, ARSWITCH_DBG_PHYIO, + "%s: phy=0x%08x, reg=0x%08x, data=0x%08x, err=%d\n", + __func__, phy, reg, data, err); + +out: + DEVERR(dev, err, "arswitch_writephy()=%d: phy=%d.%02x\n", phy, reg); + ARSWITCH_UNLOCK(sc); + return (err); +} |