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/* $OpenBSD: ohci_fdt.c,v 1.3 2021/10/24 17:52:26 mpi Exp $ */
/*
* Copyright (c) 2005, 2019 David Gwynne <dlg@openbsd.org>
* Copyright (c) 2017 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/types.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_clock.h>
#include <dev/ofw/ofw_pinctrl.h>
#include <dev/ofw/ofw_regulator.h>
#include <dev/ofw/fdt.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdivar.h>
#include <dev/usb/usb_mem.h>
#include <dev/usb/ohcireg.h>
#include <dev/usb/ohcivar.h>
struct ohci_fdt_softc {
struct ohci_softc sc;
int sc_node;
void *sc_ih;
};
int ohci_fdt_match(struct device *, void *, void *);
void ohci_fdt_attach(struct device *, struct device *, void *);
int ohci_fdt_detach(struct device *, int);
const struct cfattach ohci_fdt_ca = {
sizeof(struct ohci_fdt_softc),
ohci_fdt_match,
ohci_fdt_attach,
ohci_fdt_detach,
ohci_activate
};
void ohci_fdt_attach_deferred(struct device *);
int
ohci_fdt_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
return OF_is_compatible(faa->fa_node, "generic-ohci");
}
void
ohci_fdt_attach(struct device *parent, struct device *self, void *aux)
{
struct ohci_fdt_softc *sc = (struct ohci_fdt_softc *)self;
struct fdt_attach_args *faa = aux;
char *devname = sc->sc.sc_bus.bdev.dv_xname;
if (faa->fa_nreg < 1) {
printf(": no registers\n");
return;
}
sc->sc_node = faa->fa_node;
sc->sc.iot = faa->fa_iot;
sc->sc.sc_bus.dmatag = faa->fa_dmat;
sc->sc.sc_size = faa->fa_reg[0].size;
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");
goto out;
}
pinctrl_byname(sc->sc_node, "default");
clock_enable_all(sc->sc_node);
reset_deassert_all(sc->sc_node);
/* Record what interrupts were enabled by SMM/BIOS. */
sc->sc.sc_intre = bus_space_read_4(sc->sc.iot, sc->sc.ioh,
OHCI_INTERRUPT_ENABLE);
/* Disable interrupts, so we don't get any spurious ones. */
bus_space_write_4(sc->sc.iot, sc->sc.ioh, OHCI_INTERRUPT_DISABLE,
OHCI_MIE);
bus_space_barrier(sc->sc.iot, sc->sc.ioh, 0, sc->sc.sc_size,
BUS_SPACE_BARRIER_READ|BUS_SPACE_BARRIER_WRITE);
bus_space_write_4(sc->sc.iot, sc->sc.ioh,
OHCI_INTERRUPT_DISABLE, OHCI_MIE);
/* Map and establish the interrupt. */
splassert(IPL_USB);
sc->sc_ih = fdt_intr_establish(faa->fa_node, IPL_USB,
ohci_intr, &sc->sc, devname);
if (sc->sc_ih == NULL) {
printf(": can't establish interrupt\n");
goto disable_clocks;
}
printf(": ");
strlcpy(sc->sc.sc_vendor, "Generic", sizeof(sc->sc.sc_vendor));
/* Display revision. Legacy handover isn't needed as there's no smm */
if (ohci_checkrev(&sc->sc) != USBD_NORMAL_COMPLETION) {
goto disestablish_intr;
}
/* Ignore interrupts for now */
sc->sc.sc_bus.dying = 1;
config_defer(self, ohci_fdt_attach_deferred);
return;
disestablish_intr:
fdt_intr_disestablish(sc->sc_ih);
sc->sc_ih = NULL;
disable_clocks:
clock_disable_all(sc->sc_node);
bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size);
sc->sc.sc_size = 0;
out:
return;
}
void
ohci_fdt_attach_deferred(struct device *self)
{
struct ohci_fdt_softc *sc = (struct ohci_fdt_softc *)self;
usbd_status r;
int s;
s = splusb();
sc->sc.sc_bus.dying = 0;
r = ohci_init(&sc->sc);
splx(s);
if (r != USBD_NORMAL_COMPLETION) {
printf("%s: init failed, error=%d\n",
sc->sc.sc_bus.bdev.dv_xname, r);
fdt_intr_disestablish(sc->sc_ih);
sc->sc_ih = NULL;
clock_disable_all(sc->sc_node);
bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size);
sc->sc.sc_size = 0;
return;
}
/* Attach usb device. */
config_found(self, &sc->sc.sc_bus, usbctlprint);
}
int
ohci_fdt_detach(struct device *self, int flags)
{
struct ohci_fdt_softc *sc = (struct ohci_fdt_softc *)self;
int rv;
rv = ohci_detach(self, flags);
if (rv)
return rv;
if (sc->sc_ih != NULL) {
fdt_intr_disestablish(sc->sc_ih);
sc->sc_ih = NULL;
}
if (sc->sc.sc_size) {
bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size);
sc->sc.sc_size = 0;
}
clock_disable_all(sc->sc_node);
return 0;
}
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