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/* $OpenBSD: mvpinctrl.c,v 1.1 2017/08/25 20:00:35 patrick Exp $ */
/*
* Copyright (c) 2013,2016 Patrick Wildt <patrick@blueri.se>
* Copyright (c) 2016 Mark Kettenis <kettenis@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <machine/intr.h>
#include <machine/bus.h>
#include <machine/fdt.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_pinctrl.h>
#include <dev/ofw/fdt.h>
#define HREAD4(sc, reg) \
(bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg)))
#define HWRITE4(sc, reg, val) \
bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val))
#define HSET4(sc, reg, bits) \
HWRITE4((sc), (reg), HREAD4((sc), (reg)) | (bits))
#define HCLR4(sc, reg, bits) \
HWRITE4((sc), (reg), HREAD4((sc), (reg)) & ~(bits))
struct mvpinctrl_pin {
char *pin;
char *function;
int value;
int pid;
};
struct mvpinctrl_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
struct mvpinctrl_pin *sc_pins;
int sc_npins;
};
int mvpinctrl_match(struct device *, void *, void *);
void mvpinctrl_attach(struct device *, struct device *, void *);
int mvpinctrl_pinctrl(uint32_t, void *);
struct cfattach mvpinctrl_ca = {
sizeof (struct mvpinctrl_softc), mvpinctrl_match, mvpinctrl_attach
};
struct cfdriver mvpinctrl_cd = {
NULL, "mvpinctrl", DV_DULL
};
#define STR_HELPER(x) #x
#define STR(x) STR_HELPER(x)
#define MPP(id, func, val) { STR(mpp ## id), func, val, id }
struct mvpinctrl_pin mv88f6828_pins[] = {
MPP(4, "ge", 1),
MPP(5, "ge", 1),
MPP(6, "ge0", 1),
MPP(7, "ge0", 1),
MPP(8, "ge0", 1),
MPP(9, "ge0", 1),
MPP(10, "ge0", 1),
MPP(11, "ge0", 1),
MPP(12, "ge0", 1),
MPP(13, "ge0", 1),
MPP(14, "ge0", 1),
MPP(15, "ge0", 1),
MPP(16, "ge0", 1),
MPP(17, "ge0", 1),
MPP(20, "gpio", 0),
MPP(21, "sd0", 4),
MPP(23, "gpio", 0),
MPP(28, "sd0", 4),
MPP(37, "sd0", 4),
MPP(38, "sd0", 4),
MPP(39, "sd0", 4),
MPP(40, "sd0", 4),
MPP(41, "gpio", 0),
MPP(45, "ref", 1),
MPP(46, "ref", 1),
};
int
mvpinctrl_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
return OF_is_compatible(faa->fa_node, "marvell,mv88f6828-pinctrl");
}
void
mvpinctrl_attach(struct device *parent, struct device *self, void *aux)
{
struct fdt_attach_args *faa = aux;
struct mvpinctrl_softc *sc = (struct mvpinctrl_softc *) self;
sc->sc_iot = faa->fa_iot;
if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
faa->fa_reg[0].size, 0, &sc->sc_ioh))
panic("mvpinctrl_attach: bus_space_map failed!");
sc->sc_pins = mv88f6828_pins;
sc->sc_npins = sizeof(mv88f6828_pins) / sizeof(struct mvpinctrl_pin);
pinctrl_register(faa->fa_node, mvpinctrl_pinctrl, sc);
printf("\n");
}
int
mvpinctrl_pinctrl(uint32_t phandle, void *cookie)
{
struct mvpinctrl_softc *sc = cookie;
char *pins, *pin, *func;
int i, flen, plen, node;
node = OF_getnodebyphandle(phandle);
if (node == 0)
return -1;
flen = OF_getproplen(node, "marvell,function");
if (flen <= 0)
return -1;
func = malloc(flen, M_TEMP, M_WAITOK);
OF_getprop(node, "marvell,function", func, flen);
plen = OF_getproplen(node, "marvell,pins");
if (plen <= 0)
return -1;
pin = pins = malloc(plen, M_TEMP, M_WAITOK);
OF_getprop(node, "marvell,pins", pins, plen);
while (plen > 0) {
int found = 0;
for (i = 0; i < sc->sc_npins; i++) {
uint32_t off, shift;
if (strcmp(sc->sc_pins[i].pin, pin))
continue;
if (strcmp(sc->sc_pins[i].function, func))
continue;
found++;
off = (sc->sc_pins[i].pid / 8) * sizeof(uint32_t);
shift = (sc->sc_pins[i].pid % 8) * 4;
HWRITE4(sc, off, (HREAD4(sc, off) & ~(0xf << shift)) |
(sc->sc_pins[i].value << shift));
}
if (found == 0)
printf("%s: unsupported pin %s function %s\n",
sc->sc_dev.dv_xname, pin, func);
plen -= strlen(pin) + 1;
pin += strlen(pin) + 1;
}
free(func, M_TEMP, flen);
free(pins, M_TEMP, plen);
return 0;
}
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