/*      $NetBSD: ohci_aubus.c,v 1.18 2021/08/07 16:18:58 thorpej Exp $  */

/*-
* Copyright (c) 1998, 1999, 2000, 2002, 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Herb Peyerl of Middle Digital Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ohci_aubus.c,v 1.18 2021/08/07 16:18:58 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>

#include <sys/bus.h>

#include <mips/alchemy/include/aureg.h>
#include <mips/alchemy/include/auvar.h>
#include <mips/alchemy/include/aubusvar.h>
#include <mips/alchemy/dev/ohcireg.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>


static int      ohci_aubus_match(device_t, cfdata_t, void *);
static void     ohci_aubus_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(ohci_aubus, sizeof (ohci_softc_t),
   ohci_aubus_match, ohci_aubus_attach, NULL, NULL);

int
ohci_aubus_match(device_t parent, cfdata_t match, void *aux)
{
       struct aubus_attach_args *aa = aux;

       if (strcmp(aa->aa_name, match->cf_name) == 0)
               return 1;

       return 0;
}

void
ohci_aubus_attach(device_t parent, device_t self, void *aux)
{
       ohci_softc_t *sc = device_private(self);
       void *ih;
       uint32_t x, tmp;
       bus_addr_t usbh_base, usbh_enable;
       struct aubus_attach_args *aa = aux;

       usbh_base = aa->aa_addrs[0];
       usbh_enable = aa->aa_addrs[1];
       sc->sc_size = aa->aa_addrs[2];
       sc->iot = aa->aa_st;
       sc->sc_bus.ub_dmatag = (bus_dma_tag_t)aa->aa_dt;

       sc->sc_dev = self;
       sc->sc_bus.ub_hcpriv = sc;

       if (bus_space_map(sc->iot, usbh_base, sc->sc_size, 0, &sc->ioh)) {
               aprint_error_dev(self, "unable to map USBH registers\n");
               return;
       }
       /*
        * Enable the USB Host controller here.
        * As per 7.2 in the Au1500 manual:
        *
        *  (1) Set CE bit to enable clocks.
        *  (2) Set E to enable OHCI
        *  (3) Clear HCFS in OHCI_CONTROL.
        *  (4) Wait for RD bit to be set.
        */
       x = bus_space_read_4(sc->iot, sc->ioh, usbh_enable);
       x |= UE_CE;
       bus_space_write_4(sc->iot, sc->ioh, usbh_enable, x);
       delay(10);
       x |= UE_E;
#ifdef __MIPSEB__
       x |= UE_BE;
#endif
       bus_space_write_4(sc->iot, sc->ioh, usbh_enable, x);
       delay(10);
       x = bus_space_read_4(sc->iot, sc->ioh, OHCI_CONTROL);
       x &= ~(OHCI_HCFS_MASK);
       bus_space_write_4(sc->iot, sc->ioh, OHCI_CONTROL, x);
       delay(10);
       /*  Need to read USBH_ENABLE twice in succession according to
        *  au1500 Errata #7.
        */
       for (x = 100; x; x--) {
               bus_space_read_4(sc->iot, sc->ioh, usbh_enable);
               tmp = bus_space_read_4(sc->iot, sc->ioh, usbh_enable);
               if (tmp&UE_RD)
                       break;
               delay(1000);
       }

       if (x == 0) {
               aprint_error_dev(self, "device not ready\n");
               return;
       }

       printf(": Alchemy OHCI\n");

       /* Disable OHCI interrupts */
       bus_space_write_4(sc->iot, sc->ioh, OHCI_INTERRUPT_DISABLE,
                               OHCI_ALL_INTRS);
       /* hook interrupt */
       ih = au_intr_establish(aa->aa_irq[0], 0, IPL_USB, IST_LEVEL_LOW,
                       ohci_intr, sc);
       if (ih == NULL) {
               aprint_error_dev(self,"couldn't establish interrupt\n");
       }

       sc->sc_endian = OHCI_HOST_ENDIAN;

       int err = ohci_init(sc);
       if (err != USBD_NORMAL_COMPLETION) {
               aprint_error_dev(self, "init failed, error=%d\n", err);
               au_intr_disestablish(ih);
               return;
       }

       /* Attach USB device */
       sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint, CFARGS_NONE);

}