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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2018 Rubicon Communications, LLC (Netgate)
*
* 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.
*
* $FreeBSD$
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/intr.h>
#include <dev/extres/syscon/syscon.h>
#include <dev/fdt/fdt_pinctrl.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include "syscon_if.h"
#define PINS_PER_REG 8
#define BITS_PER_PIN 4
#define PINS_MASK 0xf
#define MAX_PIN_FUNC 5
struct mv_pins {
const char *name;
const char *functions[MAX_PIN_FUNC];
};
struct mv_padconf {
const struct mv_pins *pins;
size_t npins;
};
const static struct mv_pins ap806_pins[] = {
{"mpp0", {"gpio", "sdio", NULL, "spi0"}},
{"mpp1", {"gpio", "sdio", NULL, "spi0"}},
{"mpp2", {"gpio", "sdio", NULL, "spi0"}},
{"mpp3", {"gpio", "sdio", NULL, "spi0"}},
{"mpp4", {"gpio", "sdio", NULL, "i2c0"}},
{"mpp5", {"gpio", "sdio", NULL, "i2c0"}},
{"mpp6", {"gpio", "sdio", NULL, NULL}},
{"mpp7", {"gpio", "sdio", NULL, "uart1"}},
{"mpp8", {"gpio", "sdio", NULL, "uart1"}},
{"mpp9", {"gpio", "sdio", NULL, "spi0"}},
{"mpp10", {"gpio", "sdio", NULL, NULL}},
{"mpp11", {"gpio", NULL, NULL, "uart0"}},
{"mpp12", {"gpio", "sdio", "sdio", NULL}},
{"mpp13", {"gpio", NULL, NULL}},
{"mpp14", {"gpio", NULL, NULL}},
{"mpp15", {"gpio", NULL, NULL}},
{"mpp16", {"gpio", NULL, NULL}},
{"mpp17", {"gpio", NULL, NULL}},
{"mpp18", {"gpio", NULL, NULL}},
{"mpp19", {"gpio", NULL, NULL, "uart0", "sdio"}},
};
const struct mv_padconf ap806_padconf = {
.npins = nitems(ap806_pins),
.pins = ap806_pins,
};
struct mv_pinctrl_softc {
device_t dev;
struct syscon *syscon;
struct mv_padconf *padconf;
};
static struct ofw_compat_data compat_data[] = {
{"marvell,ap806-pinctrl", (uintptr_t)&ap806_padconf},
{NULL, 0}
};
#define RD4(sc, reg) SYSCON_READ_4((sc)->syscon, (reg))
#define WR4(sc, reg, val) SYSCON_WRITE_4((sc)->syscon, (reg), (val))
static void
mv_pinctrl_configure_pin(struct mv_pinctrl_softc *sc, uint32_t pin,
uint32_t function)
{
uint32_t offset, shift, reg;
offset = (pin / PINS_PER_REG) * BITS_PER_PIN;
shift = (pin % PINS_PER_REG) * BITS_PER_PIN;
reg = RD4(sc, offset);
reg &= ~(PINS_MASK << shift);
reg |= function << shift;
WR4(sc, offset, reg);
}
static int
mv_pinctrl_configure_pins(device_t dev, phandle_t cfgxref)
{
struct mv_pinctrl_softc *sc;
phandle_t node;
char *function;
const char **pins;
int i, pin_num, pin_func, npins;
sc = device_get_softc(dev);
node = OF_node_from_xref(cfgxref);
if (OF_getprop_alloc(node, "marvell,function",
(void **)&function) == -1)
return (ENOMEM);
npins = ofw_bus_string_list_to_array(node, "marvell,pins", &pins);
if (npins == -1)
return (ENOMEM);
for (i = 0; i < npins; i++) {
for (pin_num = 0; pin_num < sc->padconf->npins; pin_num++) {
if (strcmp(pins[i], sc->padconf->pins[pin_num].name) == 0)
break;
}
if (pin_num == sc->padconf->npins)
continue;
for (pin_func = 0; pin_func < MAX_PIN_FUNC; pin_func++)
if (sc->padconf->pins[pin_num].functions[pin_func] &&
strcmp(function, sc->padconf->pins[pin_num].functions[pin_func]) == 0)
break;
if (pin_func == MAX_PIN_FUNC)
continue;
mv_pinctrl_configure_pin(sc, pin_num, pin_func);
}
OF_prop_free(pins);
return (0);
}
static int
mv_pinctrl_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
return (ENXIO);
device_set_desc(dev, "Marvell Pinctrl controller");
return (BUS_PROBE_DEFAULT);
}
static int
mv_pinctrl_attach(device_t dev)
{
struct mv_pinctrl_softc *sc;
phandle_t node;
sc = device_get_softc(dev);
sc->dev = dev;
sc->padconf = (struct mv_padconf *)
ofw_bus_search_compatible(dev,compat_data)->ocd_data;
if (SYSCON_GET_HANDLE(sc->dev, &sc->syscon) != 0 ||
sc->syscon == NULL) {
device_printf(dev, "cannot get syscon for device\n");
return (ENXIO);
}
node = ofw_bus_get_node(dev);
fdt_pinctrl_register(dev, "marvell,pins");
fdt_pinctrl_configure_tree(dev);
return (0);
}
static int
mv_pinctrl_detach(device_t dev)
{
return (EBUSY);
}
static device_method_t mv_pinctrl_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, mv_pinctrl_probe),
DEVMETHOD(device_attach, mv_pinctrl_attach),
DEVMETHOD(device_detach, mv_pinctrl_detach),
/* fdt_pinctrl interface */
DEVMETHOD(fdt_pinctrl_configure,mv_pinctrl_configure_pins),
DEVMETHOD_END
};
static devclass_t mv_pinctrl_devclass;
static driver_t mv_pinctrl_driver = {
"mv_pinctrl",
mv_pinctrl_methods,
sizeof(struct mv_pinctrl_softc),
};
EARLY_DRIVER_MODULE(mv_pinctrl, simplebus, mv_pinctrl_driver,
mv_pinctrl_devclass, 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_LATE);
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