/*      $NetBSD: cy_isa.c,v 1.24 2023/11/20 04:26:34 thorpej Exp $      */

/*
 * cy.c
 *
 * Driver for Cyclades Cyclom-8/16/32 multiport serial cards
 * (currently not tested with Cyclom-32 cards)
 *
 * Timo Rossi, 1996
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: cy_isa.c,v 1.24 2023/11/20 04:26:34 thorpej Exp $");

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

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

#include <dev/isa/isavar.h>
#include <dev/isa/isareg.h>

#include <dev/ic/cd1400reg.h>
#include <dev/ic/cyreg.h>
#include <dev/ic/cyvar.h>

int     cy_isa_probe(device_t, cfdata_t, void *);
void    cy_isa_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(cy_isa, sizeof(struct cy_softc),
    cy_isa_probe, cy_isa_attach, NULL, NULL);

int
cy_isa_probe(device_t parent, cfdata_t match, void *aux)
{
        struct isa_attach_args *ia = aux;
        struct cy_softc *sc;
        int found = 0;

        if (ia->ia_niomem < 1)
                return (0);
        if (ia->ia_nirq < 1)
                return (0);

        /* Disallow wildcarded memory address. */
        if (ia->ia_iomem[0].ir_addr == ISA_UNKNOWN_IOMEM)
                return 0;
        if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ)
                return 0;

        sc = kmem_zalloc(sizeof(*sc), KM_SLEEP);

        sc->sc_memt = ia->ia_memt;
        sc->sc_bustype = CY_BUSTYPE_ISA;

        if (bus_space_map(ia->ia_memt, ia->ia_iomem[0].ir_addr, CY_MEMSIZE, 0,
            &sc->sc_bsh) != 0)
                goto out;

        found = cy_find(sc);

        bus_space_unmap(ia->ia_memt, sc->sc_bsh, CY_MEMSIZE);

        if (found) {
                ia->ia_niomem = 1;
                ia->ia_iomem[0].ir_size = CY_MEMSIZE;

                ia->ia_nirq = 1;

                ia->ia_nio = 0;
                ia->ia_ndrq = 0;
        }
 out:
        kmem_free(sc, sizeof(*sc));
        return (found);
}

void
cy_isa_attach(device_t parent, device_t self, void *aux)
{
        struct cy_softc *sc = device_private(self);
        struct isa_attach_args *ia = aux;

        sc->sc_dev = self;
        sc->sc_memt = ia->ia_memt;
        sc->sc_bustype = CY_BUSTYPE_ISA;

        printf(": Cyclades-Y multiport serial\n");

        if (bus_space_map(ia->ia_memt, ia->ia_iomem[0].ir_addr, CY_MEMSIZE, 0,
            &sc->sc_bsh) != 0) {
                aprint_error_dev(sc->sc_dev,
                    "unable to map device registers\n");
                return;
        }

        if (cy_find(sc) == 0) {
                aprint_error_dev(sc->sc_dev, "unable to find CD1400s\n");
                return;
        }

        cy_attach(sc);

        sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq,
            IST_EDGE, IPL_TTY, cy_intr, sc);
        if (sc->sc_ih == NULL)
                aprint_error_dev(sc->sc_dev, "unable to establish interrupt\n");
}