/*      $NetBSD: ipaq_pcic.c,v 1.24 2023/12/20 14:50:02 thorpej Exp $        */

/*-
 * Copyright (c) 2001 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Ichiro FUKUHARA (ichiro@ichiro.org).
 *
 * 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: ipaq_pcic.c,v 1.24 2023/12/20 14:50:02 thorpej 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 <hpcarm/dev/ipaq_saipvar.h>
#include <hpcarm/dev/ipaq_pcicreg.h>
#include <hpcarm/dev/ipaq_gpioreg.h>

#include <arm/sa11x0/sa11x0_gpioreg.h>
#include <arm/sa11x0/sa11x0_var.h>
#include <arm/sa11x0/sa11xx_pcicvar.h>

#include "ipaqpcic.h"

static  int     ipaqpcic_match(device_t, cfdata_t, void *);
static  void    ipaqpcic_attach(device_t, device_t, void *);
static  int     ipaqpcic_print(void *, const char *);

static  int     ipaqpcic_read(struct sapcic_socket *, int);
static  void    ipaqpcic_write(struct sapcic_socket *, int, int);
static  void    ipaqpcic_set_power(struct sapcic_socket *, int);
static  void    ipaqpcic_clear_intr(int);
static  void    *ipaqpcic_intr_establish(struct sapcic_socket *, int,
                                       int (*)(void *), void *);
static  void    ipaqpcic_intr_disestablish(struct sapcic_socket *, void *);

struct ipaqpcic_softc {
        struct sapcic_softc     sc_pc;
        bus_space_handle_t      sc_ioh;
        struct ipaq_softc       *sc_parent;
        struct sapcic_socket    sc_socket[2];
};

static  void    ipaqpcic_init(struct ipaqpcic_softc *);

static struct sapcic_tag ipaqpcic_functions = {
        ipaqpcic_read,
        ipaqpcic_write,
        ipaqpcic_set_power,
        ipaqpcic_clear_intr,
        ipaqpcic_intr_establish,
        ipaqpcic_intr_disestablish
};

CFATTACH_DECL_NEW(ipaqpcic, sizeof(struct ipaqpcic_softc),
    ipaqpcic_match, ipaqpcic_attach, NULL, NULL);

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

static void
ipaqpcic_attach(device_t parent, device_t self, void *aux)
{
        int i;
        struct pcmciabus_attach_args paa;
        struct ipaqpcic_softc *sc = device_private(self);
        struct ipaq_softc *psc = device_private(parent);

        aprint_normal("\n");

        sc->sc_pc.sc_dev = self;
        sc->sc_pc.sc_iot = psc->sc_iot;
        sc->sc_ioh = psc->sc_ioh;
        sc->sc_parent = psc;

        ipaqpcic_init(sc);

        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 = &ipaqpcic_functions;
                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;

                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, ipaqpcic_print,
                                 CFARGS_NONE);

                sa11x0_intr_establish((sa11x0_chipset_tag_t)psc,
                            i ? IRQ_CD1 : IRQ_CD0,
                            1, IPL_BIO, sapcic_intr,
                            &sc->sc_socket[i]);

                /* schedule kthread creation */
                sapcic_kthread_create(&sc->sc_socket[i]);

#if 0 /* XXX */
                /* establish_intr should be after creating the kthread */
                config_interrupt(&sc->sc_socket[i], ipaqpcic_config_intr);
#endif
        }
}

static int
ipaqpcic_print(void *aux, const char *name)
{
        return (UNCONF);
}

static void
ipaqpcic_init(struct ipaqpcic_softc *sc)
{
        int cr;

        /* All those are inputs */
        cr = bus_space_read_4(sc->sc_pc.sc_iot, sc->sc_parent->sc_gpioh, SAGPIO_PDR);
        cr &= ~(GPIO_H3600_PCMCIA_CD0 | GPIO_H3600_PCMCIA_CD1 | GPIO_H3600_PCMCIA_IRQ0 |
                GPIO_H3600_PCMCIA_IRQ1);
        bus_space_write_4(sc->sc_pc.sc_iot, sc->sc_parent->sc_gpioh, SAGPIO_PDR, cr);

        sc->sc_parent->ipaq_egpio |=
                EGPIO_H3600_OPT_NVRAM_ON | EGPIO_H3600_OPT_ON ;
        sc->sc_parent->ipaq_egpio &=
                ~(EGPIO_H3600_CARD_RESET | EGPIO_H3600_OPT_RESET);
        bus_space_write_2(sc->sc_pc.sc_iot, sc->sc_parent->sc_egpioh,
                          0, sc->sc_parent->ipaq_egpio);
}

static int
ipaqpcic_read(struct sapcic_socket *so, int reg)
{
        int cr, bit;
        struct ipaqpcic_softc *sc = (struct ipaqpcic_softc *)so->sc;

        cr = bus_space_read_4(sc->sc_pc.sc_iot, sc->sc_parent->sc_gpioh, SAGPIO_PLR);

        switch (reg) {
        case SAPCIC_STATUS_CARD:
                bit = (so->socket ? GPIO_H3600_PCMCIA_CD0 :
                                GPIO_H3600_PCMCIA_CD1) & cr;
                if (!bit)
                        return SAPCIC_CARD_INVALID;
                else
                        return SAPCIC_CARD_VALID;
        case SAPCIC_STATUS_VS1:
        case SAPCIC_STATUS_VS2:
        case SAPCIC_STATUS_READY:
                bit = (so->socket ? GPIO_H3600_PCMCIA_IRQ0:
                                GPIO_H3600_PCMCIA_IRQ1);
                return (bit & cr);
        default:
                panic("ipaqpcic_read: bogus register");
        }
}

static void
ipaqpcic_write(struct sapcic_socket *so, int reg, int arg)
{
        int s;
        struct ipaqpcic_softc *sc = (struct ipaqpcic_softc *)so->sc;

        s = splhigh();
        switch (reg) {
        case SAPCIC_CONTROL_RESET:
                sc->sc_parent->ipaq_egpio |= EGPIO_H3600_CARD_RESET;
                break;
        case SAPCIC_CONTROL_LINEENABLE:
        case SAPCIC_CONTROL_WAITENABLE:
        case SAPCIC_CONTROL_POWERSELECT:
                break;

        default:
                splx(s);
                panic("ipaqpcic_write: bogus register");
        }
        bus_space_write_2(sc->sc_pc.sc_iot, sc->sc_parent->sc_egpioh, 0,
                          sc->sc_parent->ipaq_egpio);
        splx(s);
}
                
static void
ipaqpcic_set_power(struct sapcic_socket *so, int arg)
{
        int s;
        struct ipaqpcic_softc *sc = (struct ipaqpcic_softc *)so->sc;

        s = splbio();
        switch (arg) {
        case SAPCIC_POWER_OFF:
                sc->sc_parent->ipaq_egpio &=
                        ~(EGPIO_H3600_OPT_NVRAM_ON | EGPIO_H3600_OPT_ON);
                break;
        case SAPCIC_POWER_3V:
        case SAPCIC_POWER_5V:
                sc->sc_parent->ipaq_egpio |=
                        EGPIO_H3600_OPT_NVRAM_ON | EGPIO_H3600_OPT_ON;
                break;
        default:
                panic("ipaqpcic_set_power: bogus arg");
        }
        bus_space_write_2(sc->sc_pc.sc_iot, sc->sc_parent->sc_egpioh,
                          0, sc->sc_parent->ipaq_egpio);
        splx(s);
}

static void
ipaqpcic_clear_intr(int arg)
{
}

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

        irq = so->socket ? IRQ_IRQ0 : IRQ_IRQ1;
        return (sa11x0_intr_establish((sa11x0_chipset_tag_t)so->pcictag_cookie,
                                    irq-16, 1, level, ih_fun, ih_arg));
}

static void
ipaqpcic_intr_disestablish(struct sapcic_socket *so, void *ih)
{
        sa11x0_intr_disestablish((sa11x0_chipset_tag_t)so->pcictag_cookie, ih);
}