129 lines
4.1 KiB
C
129 lines
4.1 KiB
C
/*-
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* Copyright (c) 2010 Juli Mallett <jmallett@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Interface to the Marvell 88E61XX SMI/MDIO.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/endian.h>
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#include <sys/kernel.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <dev/mii/mii.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include "wrapper-cvmx-includes.h"
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#include "ethernet-headers.h"
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#define MV88E61XX_SMI_REG_CMD 0x00 /* Indirect command register. */
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#define MV88E61XX_SMI_CMD_BUSY 0x8000 /* Busy bit. */
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#define MV88E61XX_SMI_CMD_22 0x1000 /* Clause 22 (default 45.) */
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#define MV88E61XX_SMI_CMD_READ 0x0800 /* Read command. */
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#define MV88E61XX_SMI_CMD_WRITE 0x0400 /* Write command. */
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#define MV88E61XX_SMI_CMD_PHY(phy) (((phy) & 0x1f) << 5)
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#define MV88E61XX_SMI_CMD_REG(reg) ((reg) & 0x1f)
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#define MV88E61XX_SMI_REG_DAT 0x01 /* Indirect data register. */
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static int cvm_oct_mv88e61xx_smi_read(struct ifnet *, int, int);
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static void cvm_oct_mv88e61xx_smi_write(struct ifnet *, int, int, int);
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static int cvm_oct_mv88e61xx_smi_wait(struct ifnet *);
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int
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cvm_oct_mv88e61xx_setup_device(struct ifnet *ifp)
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{
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cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc;
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priv->mdio_read = cvm_oct_mv88e61xx_smi_read;
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priv->mdio_write = cvm_oct_mv88e61xx_smi_write;
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priv->phy_device = "mv88e61xxphy";
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return (0);
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}
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static int
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cvm_oct_mv88e61xx_smi_read(struct ifnet *ifp, int phy_id, int location)
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{
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cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc;
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int error;
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error = cvm_oct_mv88e61xx_smi_wait(ifp);
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if (error != 0)
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return (0);
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cvm_oct_mdio_write(ifp, priv->phy_id, MV88E61XX_SMI_REG_CMD,
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MV88E61XX_SMI_CMD_BUSY | MV88E61XX_SMI_CMD_22 |
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MV88E61XX_SMI_CMD_READ | MV88E61XX_SMI_CMD_PHY(phy_id) |
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MV88E61XX_SMI_CMD_REG(location));
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error = cvm_oct_mv88e61xx_smi_wait(ifp);
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if (error != 0)
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return (0);
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return (cvm_oct_mdio_read(ifp, priv->phy_id, MV88E61XX_SMI_REG_DAT));
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}
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static void
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cvm_oct_mv88e61xx_smi_write(struct ifnet *ifp, int phy_id, int location, int val)
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{
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cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc;
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cvm_oct_mv88e61xx_smi_wait(ifp);
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cvm_oct_mdio_write(ifp, priv->phy_id, MV88E61XX_SMI_REG_DAT, val);
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cvm_oct_mdio_write(ifp, priv->phy_id, MV88E61XX_SMI_REG_CMD,
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MV88E61XX_SMI_CMD_BUSY | MV88E61XX_SMI_CMD_22 |
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MV88E61XX_SMI_CMD_WRITE | MV88E61XX_SMI_CMD_PHY(phy_id) |
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MV88E61XX_SMI_CMD_REG(location));
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cvm_oct_mv88e61xx_smi_wait(ifp);
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}
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static int
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cvm_oct_mv88e61xx_smi_wait(struct ifnet *ifp)
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{
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cvm_oct_private_t *priv = (cvm_oct_private_t *)ifp->if_softc;
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uint16_t cmd;
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unsigned i;
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for (i = 0; i < 10000; i++) {
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cmd = cvm_oct_mdio_read(ifp, priv->phy_id, MV88E61XX_SMI_REG_CMD);
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if ((cmd & MV88E61XX_SMI_CMD_BUSY) == 0)
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return (0);
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}
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return (ETIMEDOUT);
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}
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