/* $NetBSD: vrecu.c,v 1.11 2023/12/20 14:50:02 thorpej Exp $ */

/*
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Naoto Shimazaki of YOKOGAWA Electric Corporation.
*
* 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: vrecu.c,v 1.11 2023/12/20 14:50:02 thorpej Exp $");

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

#include <machine/bus.h>
#include <machine/intr.h>

#include <hpcmips/vr/vrcpudef.h>
#include <hpcmips/vr/vripif.h>
#include <hpcmips/vr/vr4181ecureg.h>

#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
#include <dev/pcmcia/pcmciareg.h>
#include <dev/pcmcia/pcmciavar.h>
#include <dev/pcmcia/pcmciachip.h>

#include <dev/ic/i82365reg.h>
#include <dev/ic/i82365var.h>
#include <dev/isa/i82365_isavar.h>

static int pcic_vrip_match(device_t, cfdata_t, void *);
static void pcic_vrip_attach(device_t, device_t, void *);
static void *pcic_vrip_chip_intr_establish(pcmcia_chipset_handle_t,
                                          struct pcmcia_function *, int,
                                          int (*)(void *), void *);
static void pcic_vrip_chip_intr_disestablish(pcmcia_chipset_handle_t, void *);
static int pcic_vrip_intr(void *);

struct pcic_vrip_softc {
       struct pcic_softc       sc_pcic;        /* real pcic softc */
       uint16_t                sc_intr_mask;
       uint16_t                sc_intr_valid;
       struct intrhand {
               int     (*ih_fun)(void *);
               void    *ih_arg;
       }                       sc_intrhand[ECU_MAX_INTR];
};

CFATTACH_DECL_NEW(pcic_vrip, sizeof(struct pcic_vrip_softc),
             pcic_vrip_match, pcic_vrip_attach, NULL, NULL);

static struct pcmcia_chip_functions pcic_vrip_functions = {
       .mem_alloc              = pcic_chip_mem_alloc,
       .mem_free               = pcic_chip_mem_free,
       .mem_map                = pcic_chip_mem_map,
       .mem_unmap              = pcic_chip_mem_unmap,

       .io_alloc               = pcic_chip_io_alloc,
       .io_free                = pcic_chip_io_free,
       .io_map                 = pcic_chip_io_map,
       .io_unmap               = pcic_chip_io_unmap,

       .intr_establish         = pcic_vrip_chip_intr_establish,
       .intr_disestablish      = pcic_vrip_chip_intr_disestablish,

       .socket_enable          = pcic_chip_socket_enable,
       .socket_disable         = pcic_chip_socket_disable,
       .socket_settype         = pcic_chip_socket_settype,
};


static int
pcic_vrip_match(device_t parent, cfdata_t match, void *aux)
{
       return 1;
}

static void
pcic_vrip_attach(device_t parent, device_t self, void *aux)
{
       struct pcic_vrip_softc  *vsc = device_private(self);
       struct pcic_softc       *sc = &vsc->sc_pcic;
       struct vrip_attach_args *va = aux;
       bus_space_handle_t      ioh;
       bus_space_handle_t      memh;
       int                     i;

       sc->dev = self;
       vsc->sc_intr_valid = PCIC_INTR_IRQ_VALIDMASK;
       vsc->sc_intr_mask = 0xffff;
       for (i = 0; i < ECU_MAX_INTR; i++)
               vsc->sc_intrhand[i].ih_fun = NULL;

       if ((sc->ih = vrip_intr_establish(va->va_vc, va->va_unit, 0,
                                         IPL_NET, pcic_vrip_intr, vsc))
           == NULL) {
               printf(": can't establish interrupt");
       }

       /* Map i/o space. */
       if (bus_space_map(va->va_iot, va->va_addr, ECU_SIZE, 0, &ioh)) {
               printf(": can't map pcic register space\n");
               return;
       }

       /* init CFG_REG_1 */
       bus_space_write_2(va->va_iot, ioh, ECU_CFG_REG_1_W, 0x0001);

       /* mask all interrupt */
       bus_space_write_2(va->va_iot, ioh, ECU_INTMSK_REG_W,
                         vsc->sc_intr_mask);

       /* Map mem space. */
#if 1
       if (bus_space_map(va->va_iot, VR_ISA_MEM_BASE, 0x4000, 0, &memh))
               panic("pcic_pci_attach: can't map mem space");

       sc->membase = VR_ISA_MEM_BASE;
       sc->subregionmask = (1 << (0x4000 / PCIC_MEM_PAGESIZE)) - 1;

       sc->iobase = VR_ISA_PORT_BASE + 0x400;
       sc->iosize = 0xbff;
#else
       if (bus_space_map(va->va_iot, VR_ISA_MEM_BASE, 0x70000, 0, &memh))
               panic("pcic_pci_attach: can't map mem space");

       sc->membase = VR_ISA_MEM_BASE;
       sc->subregionmask = (1 << (0x70000 / PCIC_MEM_PAGESIZE)) - 1;

       sc->iobase = VR_ISA_PORT_BASE;
       sc->iosize = 0x10000;
#endif

       sc->pct = &pcic_vrip_functions;

       sc->iot = va->va_iot;
       sc->ioh = ioh;
       sc->memt = va->va_iot;
       sc->memh = memh;

       printf("\n");

       sc->irq = -1;

       pcic_attach(sc);
       pcic_attach_sockets(sc);
       pcic_attach_sockets_finish(sc);
}

static void *
pcic_vrip_chip_intr_establish(pcmcia_chipset_handle_t pch,
                             struct pcmcia_function *pf,
                             int ipl,
                             int (*ih_fun)(void *),
                             void *ih_arg)
{
       struct pcic_handle      *h;
       struct pcic_softc       *sc;
       struct pcic_vrip_softc  *vsc;
       struct intrhand         *ih;

       int     irq;
       int     r;


       /*
        * XXXXXXXXXXXXXXXXXXXXXXXXXXXX
        * XXXXXXXXXXXXXXXXXXXXXXXXXXXX
        * XXXXXXXXXXXXXXXXXXXXXXXXXXXX
        */
       irq = 11;
       /*
        * XXXXXXXXXXXXXXXXXXXXXXXXXXXX
        * XXXXXXXXXXXXXXXXXXXXXXXXXXXX
        * XXXXXXXXXXXXXXXXXXXXXXXXXXXX
        */


       h = (struct pcic_handle *) pch;
       vsc = device_private(h->ph_parent);
       sc = &vsc->sc_pcic;


       ih = &vsc->sc_intrhand[irq];
       if (ih->ih_fun) /* cannot share ecu interrupt */
               return NULL;
       ih->ih_fun = ih_fun;
       ih->ih_arg = ih_arg;

       h->ih_irq = irq;
       if (h->flags & PCIC_FLAG_ENABLED) {
               r = pcic_read(h, PCIC_INTR);
               r &= ~PCIC_INTR_IRQ_MASK;
               pcic_write(h, PCIC_INTR, r | irq);
       }

       vsc->sc_intr_mask &= ~(1 << irq);
       bus_space_write_2(sc->iot, sc->ioh, ECU_INTMSK_REG_W,
                         vsc->sc_intr_mask);

       return ih;
}

static void
pcic_vrip_chip_intr_disestablish(pcmcia_chipset_handle_t pch, void *arg)
{
       struct pcic_handle      *h;
       struct pcic_softc       *sc;
       struct pcic_vrip_softc  *vsc;
       struct intrhand         *ih = arg;

       int     s;
       int     r;

       h = (struct pcic_handle *) pch;
       vsc = device_private(h->ph_parent);
       sc = &vsc->sc_pcic;

       if (ih != &vsc->sc_intrhand[h->ih_irq])
               panic("pcic_vrip_chip_intr_disestablish: bad handler");

       s = splhigh();

       vsc->sc_intr_mask |= 1 << h->ih_irq;
       bus_space_write_2(sc->iot, sc->ioh, ECU_INTMSK_REG_W,
                         vsc->sc_intr_mask);

       h->ih_irq = 0;
       if (h->flags & PCIC_FLAG_ENABLED) {
               r = pcic_read(h, PCIC_INTR);
               r &= ~(PCIC_INTR_IRQ_MASK | PCIC_INTR_ENABLE);
               pcic_write(h, PCIC_INTR, r);
       }

       ih->ih_fun = NULL;
       ih->ih_arg = NULL;

       splx(s);
}

/*
* interrupt handler
*/
static int
pcic_vrip_intr(void *arg)
{
       struct pcic_vrip_softc  *vsc = arg;
       struct pcic_softc       *sc = &vsc->sc_pcic;
       int                     i;
       uint16_t                r;

       r = bus_space_read_2(sc->iot, sc->ioh, ECU_INTSTAT_REG_W)
               & ~vsc->sc_intr_mask;

       for (i = 0; i < ECU_MAX_INTR; i++) {
               struct intrhand *ih = &vsc->sc_intrhand[i];
               if (ih->ih_fun && (r & (1 << i)))
                       ih->ih_fun(ih->ih_arg);
       }
       return 1;
}

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