f05957f7c6
using miibus, since for some devices that use multiple addresses on the bus,
going through miibus may be unclear, and for devices that are not standard
MII PHYs, miibus may throw a fit, necessitating complicated interfaces to
fake the interface that it expects during probe/attach.
o) Make the mv88e61xx SMI interface in octe attach a PHY directly and fix some
mistakes in the code that resulted from trying too hard to present a nice
interface to miibus.
o) Add a PHY driver for the mv88e61xx. If attached (it is optional in kernel
compiles so the default behavior of having a dumb switch is preserved) it
will place the switch in a VLAN-tagging mode such that each physical port
has a VLAN associated with it and interfaces for the VLANs can be created to
address or bridge between them.
XXX It would be nice for this to be part of a single module including the
SMI interface, and for it to fit into a generic switch configuration
framework and for it to use DSA rather than VLANs, but this is a start
and gives some sense of the parameters of such frameworks that are not
currently present in FreeBSD. In lieu of a switch configuration
interface, per-port media status and VLAN settings are in a sysctl tree.
XXX There may be some minor nits remaining in the handling of broadcast,
multicast and unknown destination traffic. It would also be nice to go
through and replace the few remaining magic numbers with macros at some
point in the future.
XXX This has only been tested with the MV88E6161, but it should work with
minimal or no modification on related switches, so support for probing
them was included.
Thanks to Pat Saavedra of TELoIP and Rafal Jaworowski of Semihalf for their
assistance in understanding the switch chipset.
128 lines
4.1 KiB
C
128 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 "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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