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/*-
* Copyright (c) 2015,2016 Annapurna Labs Ltd. and affiliates
* All rights reserved.
*
* Developed by Semihalf.
*
* 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("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/conf.h>
#include <sys/resource.h>
#include <machine/bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include "al_serdes.h"
#include "alpine_serdes.h"
#define SERDES_NUM_GROUPS 5
static void *serdes_base;
static uint32_t serdes_grp_offset[] = {0, 0x400, 0x800, 0xc00, 0x2000};
static struct alpine_serdes_eth_group_mode {
struct mtx lock;
enum alpine_serdes_eth_mode mode;
bool mode_set;
} alpine_serdes_eth_group_mode[SERDES_NUM_GROUPS];
static int al_serdes_probe(device_t dev);
static int al_serdes_attach(device_t dev);
static int al_serdes_detach(device_t dev);
static struct resource_spec al_serdes_spec[] = {
{ SYS_RES_MEMORY, 0, RF_ACTIVE },
{ -1, 0 }
};
struct al_serdes_softc {
struct resource *res;
};
static device_method_t al_serdes_methods[] = {
DEVMETHOD(device_probe, al_serdes_probe),
DEVMETHOD(device_attach, al_serdes_attach),
DEVMETHOD(device_detach, al_serdes_detach),
DEVMETHOD_END
};
static driver_t al_serdes_driver = {
"serdes",
al_serdes_methods,
sizeof(struct al_serdes_softc)
};
static devclass_t al_serdes_devclass;
DRIVER_MODULE(al_serdes, simplebus, al_serdes_driver,
al_serdes_devclass, 0, 0);
DRIVER_MODULE(al_serdes, ofwbus, al_serdes_driver,
al_serdes_devclass, 0, 0);
static int
al_serdes_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "annapurna-labs,al-serdes"))
return (ENXIO);
device_set_desc(dev, "Alpine Serdes");
return (BUS_PROBE_DEFAULT);
}
static int
al_serdes_attach(device_t dev)
{
struct al_serdes_softc *sc;
int err;
sc = device_get_softc(dev);
err = bus_alloc_resources(dev, al_serdes_spec, &sc->res);
if (err != 0) {
device_printf(dev, "could not allocate resources\n");
return (err);
}
/* Initialize Serdes group locks and mode */
for (int i = 0; i < nitems(alpine_serdes_eth_group_mode); i++) {
mtx_init(&alpine_serdes_eth_group_mode[i].lock, "AlSerdesMtx",
NULL, MTX_DEF);
alpine_serdes_eth_group_mode[i].mode_set = false;
}
serdes_base = (void *)rman_get_bushandle(sc->res);
return (0);
}
static int
al_serdes_detach(device_t dev)
{
struct al_serdes_softc *sc;
sc = device_get_softc(dev);
bus_release_resources(dev, al_serdes_spec, &sc->res);
for (int i = 0; i < nitems(alpine_serdes_eth_group_mode); i++) {
mtx_destroy(&alpine_serdes_eth_group_mode[i].lock);
alpine_serdes_eth_group_mode[i].mode_set = false;
}
return (0);
}
void *
alpine_serdes_resource_get(uint32_t group)
{
void *base;
base = NULL;
if (group >= SERDES_NUM_GROUPS)
return (NULL);
if (serdes_base != NULL)
base = (void *)((uintptr_t)serdes_base +
serdes_grp_offset[group]);
return (base);
}
int
alpine_serdes_eth_mode_set(uint32_t group, enum alpine_serdes_eth_mode mode)
{
struct alpine_serdes_eth_group_mode *group_mode;
group_mode = &alpine_serdes_eth_group_mode[group];
if (serdes_base == NULL)
return (EINVAL);
if (group >= SERDES_NUM_GROUPS)
return (EINVAL);
mtx_lock(&group_mode->lock);
if (!group_mode->mode_set || (group_mode->mode != mode)) {
struct al_serdes_grp_obj obj;
al_serdes_handle_grp_init(alpine_serdes_resource_get(group),
group, &obj);
if (mode == ALPINE_SERDES_ETH_MODE_SGMII)
obj.mode_set_sgmii(&obj);
else
obj.mode_set_kr(&obj);
group_mode->mode = mode;
group_mode->mode_set = true;
}
mtx_unlock(&group_mode->lock);
return (0);
}
void
alpine_serdes_eth_group_lock(uint32_t group)
{
struct alpine_serdes_eth_group_mode *group_mode;
group_mode = &alpine_serdes_eth_group_mode[group];
if (mtx_initialized(&group_mode->lock) == 0)
return;
mtx_lock(&group_mode->lock);
}
void
alpine_serdes_eth_group_unlock(uint32_t group)
{
struct alpine_serdes_eth_group_mode *group_mode;
group_mode = &alpine_serdes_eth_group_mode[group];
if (mtx_initialized(&group_mode->lock) == 0)
return;
mtx_unlock(&group_mode->lock);
}
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