/*      $NetBSD: sa11x1_pcic.c,v 1.25 2022/09/27 06:36:43 skrll Exp $        */

/*-
 * Copyright (c) 2001 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by IWAMOTO Toshihiro.
 *
 * 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: sa11x1_pcic.c,v 1.25 2022/09/27 06:36:43 skrll Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/kthread.h>

#include <sys/bus.h>

#include <dev/pcmcia/pcmciachip.h>
#include <dev/pcmcia/pcmciavar.h>
#include <arm/sa11x0/sa11x0_reg.h>
#include <arm/sa11x0/sa11x0_var.h>
#include <arm/sa11x0/sa1111_reg.h>
#include <arm/sa11x0/sa1111_var.h>
#include <arm/sa11x0/sa11x1_pcicreg.h>
#include <arm/sa11x0/sa11xx_pcicvar.h>
#include <arm/sa11x0/sa11x1_pcicvar.h>

#include "sacpcic.h"

static int      sacpcic_print(void *, const char *);

static void
sacpcic_config_deferred(device_t dev)
{
        struct sacpcic_softc *sc = device_private(dev);
        struct sapcic_socket *so;
        int i;

        for (i = 0; i < 2; i++) {
                so = &sc->sc_socket[i];
                sapcic_kthread_create(so);

                sacc_intr_establish((sacc_chipset_tag_t)so->pcictag_cookie,
                    i ? IRQ_S1_CDVALID : IRQ_S0_CDVALID,
                    IST_EDGE_RAISE, IPL_BIO, sapcic_intr, so);
        }
}

void
sacpcic_attach_common(struct sacc_softc *psc, struct sacpcic_softc *sc,
    void *aux, void (* socket_setup_hook)(struct sapcic_socket *))
{
        int i;
        struct pcmciabus_attach_args paa;

        aprint_normal("\n");

        sc->sc_pc.sc_iot = psc->sc_iot;
        sc->sc_ioh = psc->sc_ioh;

        mutex_init(&sc->sc_pc.sc_lock, MUTEX_DEFAULT, IPL_NONE);

        for (i = 0; i < 2; i++) {
                sc->sc_socket[i].sc = (struct sapcic_softc *)sc;
                sc->sc_socket[i].socket = i;
                sc->sc_socket[i].pcictag_cookie = psc;
                sc->sc_socket[i].pcictag = NULL;
                sc->sc_socket[i].event_thread = NULL;
                sc->sc_socket[i].event = 0;
                sc->sc_socket[i].laststatus = SAPCIC_CARD_INVALID;
                sc->sc_socket[i].shutdown = 0;

                socket_setup_hook(&sc->sc_socket[i]);

                paa.paa_busname = "pcmcia";
                paa.pct = (pcmcia_chipset_tag_t)&sa11x0_pcmcia_functions;
                paa.pch = (pcmcia_chipset_handle_t)&sc->sc_socket[i];

                sc->sc_socket[i].pcmcia =
                    config_found(sc->sc_pc.sc_dev, &paa, sacpcic_print,
                                 CFARGS_NONE);
        }

        config_interrupts(sc->sc_pc.sc_dev, sacpcic_config_deferred);
}

int
sacpcic_print(void *aux, const char *name)
{

        return UNCONF;
}

int
sacpcic_read(struct sapcic_socket *so, int reg)
{
        int cr, bit;
        struct sacpcic_softc *sc = (struct sacpcic_softc *)so->sc;

        cr = bus_space_read_4(sc->sc_pc.sc_iot, sc->sc_ioh, SACPCIC_SR);

        switch (reg) {
        case SAPCIC_STATUS_CARD:
                bit = (so->socket ? SR_S1_CARDDETECT : SR_S0_CARDDETECT) & cr;
                if (bit)
                        return SAPCIC_CARD_INVALID;
                else
                        return SAPCIC_CARD_VALID;

        case SAPCIC_STATUS_VS1:
                bit = (so->socket ? SR_S1_VS1 : SR_S0_VS1);
                return (bit & cr);

        case SAPCIC_STATUS_VS2:
                bit = (so->socket ? SR_S1_VS2 : SR_S0_VS2);
                return (bit & cr);

        case SAPCIC_STATUS_READY:
                bit = (so->socket ? SR_S1_READY : SR_S0_READY);
                return (bit & cr);

        default:
                panic("sacpcic_read: bogus register");
        }
}

void
sacpcic_write(struct sapcic_socket *so, int reg, int arg)
{
        int s, oldvalue, newvalue, mask;
        struct sacpcic_softc *sc = (struct sacpcic_softc *)so->sc;

        s = splhigh();
        oldvalue = bus_space_read_4(sc->sc_pc.sc_iot, sc->sc_ioh, SACPCIC_CR);

        switch (reg) {
        case SAPCIC_CONTROL_RESET:
                mask = so->socket ? CR_S1_RST : CR_S0_RST;

                newvalue = (oldvalue & ~mask) | (arg ? mask : 0);
                break;

        case SAPCIC_CONTROL_LINEENABLE:
                mask = so->socket ? CR_S1_FLT : CR_S0_FLT;

                newvalue = (oldvalue & ~mask) | (arg ? mask : 0);
                break;

        case SAPCIC_CONTROL_WAITENABLE:
                mask = so->socket ? CR_S1_PWAITEN : CR_S0_PWAITEN;

                newvalue = (oldvalue & ~mask) | (arg ? mask : 0);
                break;

        case SAPCIC_CONTROL_POWERSELECT:
                mask = so->socket ? CR_S1_PSE : CR_S0_PSE;
                newvalue = oldvalue & ~mask;

                switch (arg) {
                case SAPCIC_POWER_3V:
                        break;
                case SAPCIC_POWER_5V:
                        newvalue |= mask;
                        break;
                default:
                        splx(s);
                        panic("sacpcic_write: bogus arg");
                }
                break;

        default:
                splx(s);
                panic("sacpcic_write: bogus register");
        }
        bus_space_write_4(sc->sc_pc.sc_iot, sc->sc_ioh, SACPCIC_CR, newvalue);
        splx(s);
}
                
void
sacpcic_clear_intr(int arg)
{
        /* sacc_intr_dispatch takes care of intr status */
}

void *
sacpcic_intr_establish(struct sapcic_socket *so, int level,
    int (*ih_fun)(void *), void *ih_arg)
{
        int irq;

        irq = so->socket ? IRQ_S1_READY : IRQ_S0_READY;
        return sacc_intr_establish((sacc_chipset_tag_t)so->pcictag_cookie, irq,
                                    IST_EDGE_FALL, level, ih_fun, ih_arg);
}

void
sacpcic_intr_disestablish(struct sapcic_socket *so, void *ih)
{
        sacc_intr_disestablish((sacc_chipset_tag_t)so->pcictag_cookie, ih);
}