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/*-
* Copyright (c) 2017 Ian Lepore <ian@freebsd.org>
* All rights reserved.
*
* Development sponsored by Microsemi, Inc.
*
* 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/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* Microsemi / Vitesse VSC8501 (and similar).
*/
#include "opt_platform.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/malloc.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"
#ifdef FDT
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/mii/mii_fdt.h>
#endif
/* Vitesse VSC8501 */
#define VSC8501_EXTPAGE_REG 0x001f
#define VSC8501_EXTCTL1_REG 0x0017
#define VSC8501_EXTCTL1_RGMII_MODE (1u << 12)
#define VSC8501_RGMII_CTRL_PAGE 0x02
#define VSC8501_RGMII_CTRL_REG 0x14
#define VSC8501_RGMII_DELAY_MASK 0x07
#define VSC8501_RGMII_DELAY_TXSHIFT 0
#define VSC8501_RGMII_DELAY_RXSHIFT 4
#define VSC8501_RGMII_RXCLOCK_DISABLE (1u << 11)
#define VSC8501_RGMII_RXSWAP (1u << 7)
#define VSC8501_RGMII_TXSWAP (1u << 3)
#define VSC8501_RGMII_LANESWAP (VSC8501_RGMII_RXSWAP | \
VSC8501_RGMII_TXSWAP)
struct vscphy_softc {
mii_softc_t mii_sc;
device_t dev;
mii_contype_t contype;
int rxdelay;
int txdelay;
bool laneswap;
};
static void vscphy_reset(struct mii_softc *);
static int vscphy_service(struct mii_softc *, struct mii_data *, int);
static const struct mii_phydesc vscphys[] = {
MII_PHY_DESC(xxVITESSE, VSC8501),
MII_PHY_END
};
static const struct mii_phy_funcs vscphy_funcs = {
vscphy_service,
ukphy_status,
vscphy_reset
};
#ifdef FDT
static void
vscphy_fdt_get_config(struct vscphy_softc *vsc)
{
mii_fdt_phy_config_t *cfg;
pcell_t val;
cfg = mii_fdt_get_config(vsc->dev);
vsc->contype = cfg->con_type;
vsc->laneswap = (cfg->flags & MIIF_FDT_LANE_SWAP) &&
!(cfg->flags & MIIF_FDT_NO_LANE_SWAP);
if (OF_getencprop(cfg->phynode, "rx-delay", &val, sizeof(val)) > 0)
vsc->rxdelay = val;
if (OF_getencprop(cfg->phynode, "tx-delay", &val, sizeof(val)) > 0)
vsc->txdelay = val;
mii_fdt_free_config(cfg);
}
#endif
static inline int
vscphy_read(struct vscphy_softc *sc, u_int reg)
{
u_int val;
val = PHY_READ(&sc->mii_sc, reg);
return (val);
}
static inline void
vscphy_write(struct vscphy_softc *sc, u_int reg, u_int val)
{
PHY_WRITE(&sc->mii_sc, reg, val);
}
static void
vsc8501_setup_rgmii(struct vscphy_softc *vsc)
{
int reg;
vscphy_write(vsc, VSC8501_EXTPAGE_REG, VSC8501_RGMII_CTRL_PAGE);
reg = vscphy_read(vsc, VSC8501_RGMII_CTRL_REG);
reg &= ~VSC8501_RGMII_RXCLOCK_DISABLE;
reg &= ~VSC8501_RGMII_LANESWAP;
reg &= ~(VSC8501_RGMII_DELAY_MASK << VSC8501_RGMII_DELAY_TXSHIFT);
reg &= ~(VSC8501_RGMII_DELAY_MASK << VSC8501_RGMII_DELAY_RXSHIFT);
if (vsc->laneswap)
reg |= VSC8501_RGMII_LANESWAP;
if (vsc->contype == MII_CONTYPE_RGMII_ID ||
vsc->contype == MII_CONTYPE_RGMII_TXID) {
reg |= vsc->txdelay << VSC8501_RGMII_DELAY_TXSHIFT;
}
if (vsc->contype == MII_CONTYPE_RGMII_ID ||
vsc->contype == MII_CONTYPE_RGMII_RXID) {
reg |= vsc->rxdelay << VSC8501_RGMII_DELAY_RXSHIFT;
}
vscphy_write(vsc, VSC8501_RGMII_CTRL_REG, reg);
vscphy_write(vsc, VSC8501_EXTPAGE_REG, 0);
}
static void
vsc8501_reset(struct vscphy_softc *vsc)
{
int reg;
/*
* Must set whether the mac<->phy connection is RGMII first; changes to
* that bit take effect only after a softreset.
*/
reg = vscphy_read(vsc, VSC8501_EXTCTL1_REG);
if (mii_contype_is_rgmii(vsc->contype))
reg |= VSC8501_EXTCTL1_RGMII_MODE;
else
reg &= ~VSC8501_EXTCTL1_RGMII_MODE;
vscphy_write(vsc, VSC8501_EXTCTL1_REG, reg);
mii_phy_reset(&vsc->mii_sc);
/*
* Setup rgmii control register if necessary, after softreset.
*/
if (mii_contype_is_rgmii(vsc->contype))
vsc8501_setup_rgmii(vsc);
}
static void
vscphy_reset(struct mii_softc *sc)
{
struct vscphy_softc *vsc = (struct vscphy_softc *)sc;
switch (sc->mii_mpd_model) {
case MII_MODEL_xxVITESSE_VSC8501:
vsc8501_reset(vsc);
break;
default:
mii_phy_reset(sc);
break;
}
}
static int
vscphy_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;
}
/* Update the media status. */
PHY_STATUS(sc);
/* Callback if something changed. */
mii_phy_update(sc, cmd);
return (0);
}
static int
vscphy_probe(device_t dev)
{
return (mii_phy_dev_probe(dev, vscphys, BUS_PROBE_DEFAULT));
}
static int
vscphy_attach(device_t dev)
{
struct vscphy_softc *vsc;
vsc = device_get_softc(dev);
vsc->dev = dev;
#ifdef FDT
vscphy_fdt_get_config(vsc);
#endif
mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &vscphy_funcs, 1);
mii_phy_setmedia(&vsc->mii_sc);
return (0);
}
static device_method_t vscphy_methods[] = {
/* device interface */
DEVMETHOD(device_probe, vscphy_probe),
DEVMETHOD(device_attach, vscphy_attach),
DEVMETHOD(device_detach, mii_phy_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD_END
};
static devclass_t vscphy_devclass;
static driver_t vscphy_driver = {
"vscphy",
vscphy_methods,
sizeof(struct vscphy_softc)
};
DRIVER_MODULE(vscphy, miibus, vscphy_driver, vscphy_devclass, 0, 0);
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