/*      $NetBSD: uhci_pci.c,v 1.67 2022/06/29 15:37:25 mlelstv Exp $    */

/*
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Lennart Augustsson ([email protected]) at
* Carlstedt Research & Technology.
*
* 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: uhci_pci.c,v 1.67 2022/06/29 15:37:25 mlelstv Exp $");

#include "ehci.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/queue.h>

#include <sys/bus.h>

#include <dev/pci/pcivar.h>
#include <dev/pci/usb_pci.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/uhcireg.h>
#include <dev/usb/uhcivar.h>

static bool     uhci_pci_resume(device_t, const pmf_qual_t *);

struct uhci_pci_softc {
       uhci_softc_t            sc;
#if NEHCI > 0
       struct usb_pci          sc_pci;
#endif
       pci_chipset_tag_t       sc_pc;
       pcitag_t                sc_tag;
       void                    *sc_ih;         /* interrupt vectoring */
       unsigned                sc_initialized;
#define         SC_INIT_UHCI    1
#define         SC_INIT_PMF     2
#define         SC_INIT_MAPPED  4
};

static int
uhci_pci_match(device_t parent, cfdata_t match, void *aux)
{
       struct pci_attach_args *pa = (struct pci_attach_args *) aux;

       if (PCI_CLASS(pa->pa_class) == PCI_CLASS_SERIALBUS &&
           PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_SERIALBUS_USB &&
           PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_UHCI)
               return 1;

       return 0;
}

static void
uhci_pci_attach(device_t parent, device_t self, void *aux)
{
       struct uhci_pci_softc *sc = device_private(self);
       struct pci_attach_args *pa = (struct pci_attach_args *)aux;
       pci_chipset_tag_t pc = pa->pa_pc;
       pcitag_t tag = pa->pa_tag;
       char const *intrstr;
       pci_intr_handle_t *ih;
       pcireg_t csr;
       int s;
       char intrbuf[PCI_INTRSTR_LEN];

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

       pci_aprint_devinfo(pa, NULL);

       /* Map I/O registers */
       if (pci_mapreg_map(pa, PCI_CBIO, PCI_MAPREG_TYPE_IO, 0,
                          &sc->sc.iot, &sc->sc.ioh, NULL, &sc->sc.sc_size)) {
               aprint_error_dev(self, "can't map i/o space\n");
               return;
       }
       sc->sc_initialized = SC_INIT_MAPPED;

       /*
        * Disable interrupts, so we don't get any spurious ones.
        * Acknowledge all pending interrupts.
        */
       bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_INTR, 0);
       bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_STS,
           bus_space_read_2(sc->sc.iot, sc->sc.ioh, UHCI_STS));

       sc->sc_pc = pc;
       sc->sc_tag = tag;
       sc->sc.sc_bus.ub_dmatag = pa->pa_dmat;

       /* Enable the device. */
       csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG);
       pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG,
                      csr | PCI_COMMAND_MASTER_ENABLE);

       /* Map and establish the interrupt. */
       if (pci_intr_alloc(pa, &ih, NULL, 0) != 0) {
               aprint_error_dev(self, "couldn't map interrupt\n");
               return;
       }
       intrstr = pci_intr_string(pc, ih[0], intrbuf, sizeof(intrbuf));
       sc->sc_ih = pci_intr_establish_xname(pc, ih[0], IPL_USB, uhci_intr, sc,
           device_xname(self));
       if (sc->sc_ih == NULL) {
               aprint_error_dev(self, "couldn't establish interrupt");
               if (intrstr != NULL)
                       aprint_error(" at %s", intrstr);
               aprint_error("\n");
               return;
       }
       aprint_normal_dev(self, "interrupting at %s\n", intrstr);

       /*
        * Set LEGSUP register to its default value.
        * This can re-enable or trigger interrupts, so protect against
        * them and explicitly disable and ACK them afterwards.
        */
       s = splhardusb();
       pci_conf_write(pc, tag, PCI_LEGSUP, PCI_LEGSUP_USBPIRQDEN);
       bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_INTR, 0);
       bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_STS,
           bus_space_read_2(sc->sc.iot, sc->sc.ioh, UHCI_STS));
       splx(s);

       switch (pci_conf_read(pc, tag, PCI_USBREV) & PCI_USBREV_MASK) {
       case PCI_USBREV_PRE_1_0:
               sc->sc.sc_bus.ub_revision = USBREV_PRE_1_0;
               break;
       case PCI_USBREV_1_0:
               sc->sc.sc_bus.ub_revision = USBREV_1_0;
               break;
       case PCI_USBREV_1_1:
               sc->sc.sc_bus.ub_revision = USBREV_1_1;
               break;
       default:
               sc->sc.sc_bus.ub_revision = USBREV_UNKNOWN;
               break;
       }

       int err = uhci_init(&sc->sc);
       if (err) {
               aprint_error_dev(self, "init failed, error=%d\n", err);
               return;
       }
       sc->sc_initialized |= SC_INIT_UHCI;

#if NEHCI > 0
       usb_pci_add(&sc->sc_pci, pa, self);
#endif

       if (!pmf_device_register(self, uhci_suspend, uhci_pci_resume))
               aprint_error_dev(self, "couldn't establish power handler\n");
       else
               sc->sc_initialized |= SC_INIT_PMF;

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

static int
uhci_pci_detach(device_t self, int flags)
{
       struct uhci_pci_softc *sc = device_private(self);
       int rv;

       if (sc->sc_initialized & SC_INIT_UHCI) {
               rv = uhci_detach(&sc->sc, flags);
               if (rv)
                       return rv;
       }

       if (sc->sc_initialized & SC_INIT_PMF)
               pmf_device_deregister(self);

       /* disable interrupts and acknowledge any pending */
       if (sc->sc_initialized & SC_INIT_MAPPED) {
               bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_INTR, 0);
               bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_STS,
                   bus_space_read_2(sc->sc.iot, sc->sc.ioh, UHCI_STS));
       }
       sc->sc_initialized = 0;

       if (sc->sc_ih != NULL) {
               pci_intr_disestablish(sc->sc_pc, 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;
       }
#if NEHCI > 0
       usb_pci_rem(&sc->sc_pci);
#endif
       return 0;
}

static bool
uhci_pci_resume(device_t dv, const pmf_qual_t *qual)
{
       struct uhci_pci_softc *sc = device_private(dv);

       /* Set LEGSUP register to its default value. */
       pci_conf_write(sc->sc_pc, sc->sc_tag, PCI_LEGSUP,
           PCI_LEGSUP_USBPIRQDEN);

       return uhci_resume(dv, qual);
}

CFATTACH_DECL3_NEW(uhci_pci, sizeof(struct uhci_pci_softc),
   uhci_pci_match, uhci_pci_attach, uhci_pci_detach, uhci_activate,
   NULL, uhci_childdet, DVF_DETACH_SHUTDOWN);

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