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/* $OpenBSD: pxa2x0_ohci.c,v 1.23 2010/08/30 21:30:15 deraadt Exp $ */
/*
* Copyright (c) 2005 David Gwynne <dlg@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/kernel.h>
#include <sys/timeout.h>
#include <machine/intr.h>
#include <machine/bus.h>
#include <arm/xscale/pxa2x0reg.h>
#include <arm/xscale/pxa2x0var.h>
#include <arm/xscale/pxa2x0_gpio.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>
int pxaohci_match(struct device *, void *, void *);
void pxaohci_attach(struct device *, struct device *, void *);
int pxaohci_detach(struct device *, int);
int pxaohci_activate(struct device *, int);
void pxaohci_powerhook(int, void *);
struct pxaohci_softc {
ohci_softc_t sc;
void *sc_ih;
};
void pxaohci_enable(struct pxaohci_softc *);
void pxaohci_disable(struct pxaohci_softc *);
struct cfattach pxaohci_ca = {
sizeof (struct pxaohci_softc), pxaohci_match, pxaohci_attach,
pxaohci_detach, ohci_activate
};
int
pxaohci_match(struct device *parent, void *match, void *aux)
{
if ((cputype & ~CPU_ID_XSCALE_COREREV_MASK) != CPU_ID_PXA27X)
return (0);
return (1);
}
void
pxaohci_attach(struct device *parent, struct device *self, void *aux)
{
struct pxaohci_softc *sc = (struct pxaohci_softc *)self;
struct pxaip_attach_args *pxa = aux;
usbd_status r;
sc->sc.iot = pxa->pxa_iot;
sc->sc.sc_bus.dmatag = pxa->pxa_dmat;
sc->sc_ih = NULL;
sc->sc.sc_size = 0;
/* Map I/O space */
if (bus_space_map(sc->sc.iot, PXA2X0_USBHC_BASE, PXA2X0_USBHC_SIZE, 0,
&sc->sc.ioh)) {
printf(": cannot map mem space\n");
return;
}
sc->sc.sc_size = PXA2X0_USBHC_SIZE;
/* XXX copied from ohci_pci.c. needed? */
bus_space_barrier(sc->sc.iot, sc->sc.ioh, 0, sc->sc.sc_size,
BUS_SPACE_BARRIER_READ|BUS_SPACE_BARRIER_WRITE);
/* start the usb clock */
pxa2x0_clkman_config(CKEN_USBHC, 1);
pxaohci_enable(sc);
/* 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);
sc->sc_ih = pxa2x0_intr_establish(PXA2X0_INT_USBH1, IPL_USB,
ohci_intr, &sc->sc, sc->sc.sc_bus.bdev.dv_xname);
if (sc->sc_ih == NULL) {
printf(": unable to establish interrupt\n");
pxaohci_disable(sc);
pxa2x0_clkman_config(CKEN_USBHC, 0);
bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size);
sc->sc.sc_size = 0;
return;
}
strlcpy(sc->sc.sc_vendor, "PXA27x", sizeof(sc->sc.sc_vendor));
if (ohci_checkrev(&sc->sc) != USBD_NORMAL_COMPLETION)
goto unsupported;
r = ohci_init(&sc->sc);
if (r != USBD_NORMAL_COMPLETION) {
printf("%s: init failed, error=%d\n",
sc->sc.sc_bus.bdev.dv_xname, r);
unsupported:
pxa2x0_intr_disestablish(sc->sc_ih);
sc->sc_ih = NULL;
pxaohci_disable(sc);
pxa2x0_clkman_config(CKEN_USBHC, 0);
bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size);
sc->sc.sc_size = 0;
return;
}
sc->sc.sc_powerhook = powerhook_establish(pxaohci_powerhook, sc);
if (sc->sc.sc_powerhook == NULL)
printf("%s: cannot establish powerhook\n",
sc->sc.sc_bus.bdev.dv_xname);
sc->sc.sc_child = config_found((void *)sc, &sc->sc.sc_bus,
usbctlprint);
}
int
pxaohci_detach(struct device *self, int flags)
{
struct pxaohci_softc *sc = (struct pxaohci_softc *)self;
int rv;
rv = ohci_detach(&sc->sc, flags);
if (rv)
return (rv);
if (sc->sc.sc_powerhook != NULL) {
powerhook_disestablish(sc->sc.sc_powerhook);
sc->sc.sc_powerhook = NULL;
}
if (sc->sc_ih != NULL) {
pxa2x0_intr_disestablish(sc->sc_ih);
sc->sc_ih = NULL;
}
pxaohci_disable(sc);
/* stop clock */
pxa2x0_clkman_config(CKEN_USBHC, 0);
if (sc->sc.sc_size) {
bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size);
sc->sc.sc_size = 0;
}
return (0);
}
int
pxaohci_activate(struct device *self, int act)
{
struct pxaohci_softc *sc = (struct pxaohci_softc *)self;
switch (act) {
case DVACT_SUSPEND:
sc->sc.sc_bus.use_polling++;
ohci_powerhook(act, &sc->sc);
pxa2x0_clkman_config(CKEN_USBHC, 0);
sc->sc.sc_bus.use_polling--;
break;
case DVACT_RESUME:
sc->sc.sc_bus.use_polling++;
pxa2x0_clkman_config(CKEN_USBHC, 1);
pxaohci_enable(sc);
ohci_powerhook(act, &sc->sc);
sc->sc.sc_bus.use_polling--;
break;
}
return 0;
}
void
pxaohci_powerhook(int why, void *arg)
{
pxaohci_activate(arg, why);
}
void
pxaohci_enable(struct pxaohci_softc *sc)
{
u_int32_t hr;
/* Full host reset */
hr = bus_space_read_4(sc->sc.iot, sc->sc.ioh, USBHC_HR);
bus_space_write_4(sc->sc.iot, sc->sc.ioh, USBHC_HR,
(hr & USBHC_HR_MASK) | USBHC_HR_FHR);
DELAY(USBHC_RST_WAIT);
hr = bus_space_read_4(sc->sc.iot, sc->sc.ioh, USBHC_HR);
bus_space_write_4(sc->sc.iot, sc->sc.ioh, USBHC_HR,
(hr & USBHC_HR_MASK) & ~(USBHC_HR_FHR));
/* Force system bus interface reset */
hr = bus_space_read_4(sc->sc.iot, sc->sc.ioh, USBHC_HR);
bus_space_write_4(sc->sc.iot, sc->sc.ioh, USBHC_HR,
(hr & USBHC_HR_MASK) | USBHC_HR_FSBIR);
while (bus_space_read_4(sc->sc.iot, sc->sc.ioh, USBHC_HR) & \
USBHC_HR_FSBIR)
DELAY(3);
/* Enable the ports (physically only one, only enable that one?) */
hr = bus_space_read_4(sc->sc.iot, sc->sc.ioh, USBHC_HR);
bus_space_write_4(sc->sc.iot, sc->sc.ioh, USBHC_HR,
(hr & USBHC_HR_MASK) & ~(USBHC_HR_SSE));
hr = bus_space_read_4(sc->sc.iot, sc->sc.ioh, USBHC_HR);
bus_space_write_4(sc->sc.iot, sc->sc.ioh, USBHC_HR,
(hr & USBHC_HR_MASK) & ~(USBHC_HR_SSEP2));
}
void
pxaohci_disable(struct pxaohci_softc *sc)
{
u_int32_t hr;
/* Full host reset */
hr = bus_space_read_4(sc->sc.iot, sc->sc.ioh, USBHC_HR);
bus_space_write_4(sc->sc.iot, sc->sc.ioh, USBHC_HR,
(hr & USBHC_HR_MASK) | USBHC_HR_FHR);
DELAY(USBHC_RST_WAIT);
hr = bus_space_read_4(sc->sc.iot, sc->sc.ioh, USBHC_HR);
bus_space_write_4(sc->sc.iot, sc->sc.ioh, USBHC_HR,
(hr & USBHC_HR_MASK) & ~(USBHC_HR_FHR));
}
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