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/* $OpenBSD: aplrtk.c,v 1.1 2022/08/31 14:47:22 kettenis Exp $ */
/*
* Copyright (c) 2022 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/bus.h>
#include <machine/fdt.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_misc.h>
#include <dev/ofw/fdt.h>
#include <arm64/dev/rtkit.h>
#define CPU_CTRL 0x0044
#define CPU_CTRL_RUN (1 << 4)
#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))
struct aplrtk_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
bus_dma_tag_t sc_dmat;
int sc_node;
uint32_t sc_phandle;
struct rtkit sc_rtkit;
struct rtkit_state *sc_rtkit_state;
};
int aplrtk_match(struct device *, void *, void *);
void aplrtk_attach(struct device *, struct device *, void *);
const struct cfattach aplrtk_ca = {
sizeof (struct aplrtk_softc), aplrtk_match, aplrtk_attach
};
struct cfdriver aplrtk_cd = {
NULL, "aplrtk", DV_DULL
};
int
aplrtk_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
return OF_is_compatible(faa->fa_node, "apple,rtk-helper-asc4");
}
void
aplrtk_attach(struct device *parent, struct device *self, void *aux)
{
struct aplrtk_softc *sc = (struct aplrtk_softc *)self;
struct fdt_attach_args *faa = aux;
if (faa->fa_nreg < 1) {
printf(": no registers\n");
return;
}
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;
}
sc->sc_dmat = faa->fa_dmat;
sc->sc_node = faa->fa_node;
sc->sc_phandle = OF_getpropint(faa->fa_node, "phandle", 0);
printf("\n");
}
int
aplrtk_do_start(struct aplrtk_softc *sc)
{
uint32_t ctrl;
ctrl = HREAD4(sc, CPU_CTRL);
HWRITE4(sc, CPU_CTRL, ctrl | CPU_CTRL_RUN);
sc->sc_rtkit.rk_cookie = sc;
sc->sc_rtkit.rk_dmat = sc->sc_dmat;
sc->sc_rtkit_state = rtkit_init(sc->sc_node, NULL, &sc->sc_rtkit);
if (sc->sc_rtkit_state == NULL)
return EIO;
return rtkit_boot(sc->sc_rtkit_state);
}
int
aplrtk_start(uint32_t phandle)
{
struct aplrtk_softc *sc;
int i;
for (i = 0; i < aplrtk_cd.cd_ndevs; i++) {
sc = aplrtk_cd.cd_devs[i];
if (sc == NULL)
continue;
if (sc->sc_phandle == phandle)
return aplrtk_do_start(sc);
}
return ENXIO;
}
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