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/* $OpenBSD: mvpinctrl.c,v 1.5 2019/04/13 18:12:01 kettenis 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_misc.h>
#include <dev/ofw/ofw_pinctrl.h>
#include <dev/ofw/fdt.h>
#define HREAD4(sc, reg) \
(regmap_read_4((sc)->sc_rm, (reg)))
#define HWRITE4(sc, reg, val) \
regmap_write_4((sc)->sc_rm, (reg), (val))
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 regmap *sc_rm;
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 }
#include "mvpinctrl_pins.h"
struct mvpinctrl_pins {
const char *compat;
struct mvpinctrl_pin *pins;
int npins;
};
struct mvpinctrl_pins mvpinctrl_pins[] = {
{
"marvell,mv88f6810-pinctrl",
armada_38x_pins, nitems(armada_38x_pins)
},
{
"marvell,mv88f6820-pinctrl",
armada_38x_pins, nitems(armada_38x_pins)
},
{
"marvell,mv88f6828-pinctrl",
armada_38x_pins, nitems(armada_38x_pins)
},
{
"marvell,ap806-pinctrl",
armada_ap806_pins, nitems(armada_ap806_pins)
},
{
"marvell,cp110-pinctrl",
armada_cp110_pins, nitems(armada_cp110_pins)
},
{
"marvell,armada-7k-pinctrl",
armada_cp110_pins, nitems(armada_cp110_pins)
},
{
"marvell,armada-8k-cpm-pinctrl",
armada_cp110_pins, nitems(armada_cp110_pins)
},
{
"marvell,armada-8k-cps-pinctrl",
armada_cp110_pins, nitems(armada_cp110_pins)
},
};
int
mvpinctrl_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
int i;
for (i = 0; i < nitems(mvpinctrl_pins); i++) {
if (OF_is_compatible(faa->fa_node, mvpinctrl_pins[i].compat))
return 1;
}
return 0;
}
void
mvpinctrl_attach(struct device *parent, struct device *self, void *aux)
{
struct mvpinctrl_softc *sc = (struct mvpinctrl_softc *)self;
struct fdt_attach_args *faa = aux;
int i;
if (faa->fa_nreg > 0) {
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)) {
printf(": can't map registers\n");
return;
}
regmap_register(faa->fa_node, sc->sc_iot, sc->sc_ioh,
faa->fa_reg[0].size);
sc->sc_rm = regmap_bynode(faa->fa_node);
} else {
/* No registers; use regmap provided by parent. */
sc->sc_rm = regmap_bynode(OF_parent(faa->fa_node));
}
if (sc->sc_rm == NULL) {
printf(": no registers\n");
return;
}
printf("\n");
for (i = 0; i < nitems(mvpinctrl_pins); i++) {
if (OF_is_compatible(faa->fa_node, mvpinctrl_pins[i].compat)) {
sc->sc_pins = mvpinctrl_pins[i].pins;
sc->sc_npins = mvpinctrl_pins[i].npins;
break;
}
}
KASSERT(sc->sc_pins);
pinctrl_register(faa->fa_node, mvpinctrl_pinctrl, sc);
}
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) {
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;
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));
break;
}
if (i == sc->sc_npins)
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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