/*      $OpenBSD: if_acx_cardbus.c,v 1.24 2024/05/24 06:26:47 jsg Exp $  */

/*
 * Copyright (c) 2006 Claudio Jeker <claudio@openbsd.org>
 * Copyright (c) 2005, 2006
 *      Damien Bergamini <damien.bergamini@free.fr>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * CardBus front-end for the Texas Instruments ACX driver
 */

#include "bpfilter.h"

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

#include <machine/bus.h>

#include <net/if.h>
#include <net/if_media.h>

#include <netinet/in.h>
#include <netinet/if_ether.h>

#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_amrr.h>
#include <net80211/ieee80211_radiotap.h>

#include <dev/ic/acxvar.h>

#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>

#include <dev/cardbus/cardbusvar.h>

struct acx_cardbus_softc {
        struct acx_softc        sc_acx;

        /* cardbus specific goo */
        cardbus_devfunc_t       sc_ct;
        pcitag_t                sc_tag;
        void                    *sc_ih;
        bus_size_t              sc_mapsize1;
        bus_size_t              sc_mapsize2;
        pcireg_t                sc_iobar_val; /* acx100 only */
        pcireg_t                sc_bar1_val;
        pcireg_t                sc_bar2_val;
        int                     sc_intrline;

        /* hack for ACX100A */
        bus_space_tag_t         sc_io_bt;
        bus_space_handle_t      sc_io_bh;
        bus_size_t              sc_iomapsize;

        int                     sc_acx_attached;
        pci_chipset_tag_t       sc_pc;
};

int     acx_cardbus_match(struct device *, void *, void *);
void    acx_cardbus_attach(struct device *, struct device *, void *);
int     acx_cardbus_detach(struct device *, int);

const struct cfattach acx_cardbus_ca = {
        sizeof (struct acx_cardbus_softc), acx_cardbus_match,
        acx_cardbus_attach, acx_cardbus_detach
};

static const struct pci_matchid acx_cardbus_devices[] = {
        { PCI_VENDOR_TI, PCI_PRODUCT_TI_ACX100A },
        { PCI_VENDOR_TI, PCI_PRODUCT_TI_ACX100B },
        { PCI_VENDOR_TI, PCI_PRODUCT_TI_ACX111 },
};

int     acx_cardbus_enable(struct acx_softc *);
void    acx_cardbus_disable(struct acx_softc *);
void    acx_cardbus_power(struct acx_softc *, int);
void    acx_cardbus_setup(struct acx_cardbus_softc *);

int
acx_cardbus_match(struct device *parent, void *match, void *aux)
{
        return (cardbus_matchbyid((struct cardbus_attach_args *)aux,
            acx_cardbus_devices,
            sizeof (acx_cardbus_devices) / sizeof (acx_cardbus_devices[0])));
}

void
acx_cardbus_attach(struct device *parent, struct device *self, void *aux)
{
        struct acx_cardbus_softc *csc = (struct acx_cardbus_softc *)self;
        struct acx_softc *sc = &csc->sc_acx;
        struct cardbus_attach_args *ca = aux;
        cardbus_devfunc_t ct = ca->ca_ct;
        bus_addr_t base;
        int error, b1 = CARDBUS_BASE0_REG, b2 = CARDBUS_BASE1_REG;

        sc->sc_dmat = ca->ca_dmat;
        csc->sc_ct = ct;
        csc->sc_tag = ca->ca_tag;
        csc->sc_intrline = ca->ca_intrline;
        csc->sc_pc = ca->ca_pc;

        /* power management hooks */
        sc->sc_enable = acx_cardbus_enable;
        sc->sc_disable = acx_cardbus_disable;
        sc->sc_power = acx_cardbus_power;

        if (PCI_PRODUCT(ca->ca_id) == PCI_PRODUCT_TI_ACX100A) {
                /* first map I/O space as seen in the dragonfly code */
                error = Cardbus_mapreg_map(ct, CARDBUS_BASE0_REG,
                    PCI_MAPREG_TYPE_IO, 0, &csc->sc_io_bt, &csc->sc_io_bh,
                    &base, &csc->sc_iomapsize);
                if (error != 0) {
                        printf(": can't map i/o space\n");
                        return;
                }
                csc->sc_iobar_val = base | PCI_MAPREG_TYPE_IO;
                b1 = CARDBUS_BASE1_REG;
                b2 = CARDBUS_BASE2_REG;
        }

        /* map control/status registers */
        error = Cardbus_mapreg_map(ct, b1, PCI_MAPREG_TYPE_MEM, 0,
            &sc->sc_mem1_bt, &sc->sc_mem1_bh, &base, &csc->sc_mapsize1);
        if (error != 0) {
                printf(": can't map mem1 space\n");
                return;
        }

        csc->sc_bar1_val = base | PCI_MAPREG_TYPE_MEM;

        /* map the other memory region */
        error = Cardbus_mapreg_map(ct, b2, PCI_MAPREG_TYPE_MEM, 0,
            &sc->sc_mem2_bt, &sc->sc_mem2_bh, &base, &csc->sc_mapsize2);
        if (error != 0) {
                printf(": can't map mem2 space\n");
                return;
        }

        csc->sc_bar2_val = base | PCI_MAPREG_TYPE_MEM;

        /* set up the PCI configuration registers */
        acx_cardbus_setup(csc);

        printf(": irq %d\n", csc->sc_intrline);

        if (PCI_PRODUCT(ca->ca_id) == PCI_PRODUCT_TI_ACX111)
                acx111_set_param(sc);
        else
                acx100_set_param(sc);

        error = acx_attach(sc);
        csc->sc_acx_attached = error == 0;

        Cardbus_function_disable(ct);
}

int
acx_cardbus_detach(struct device *self, int flags)
{
        struct acx_cardbus_softc *csc = (struct acx_cardbus_softc *)self;
        struct acx_softc *sc = &csc->sc_acx;
        cardbus_devfunc_t ct = csc->sc_ct;
        cardbus_chipset_tag_t cc = ct->ct_cc;
        cardbus_function_tag_t cf = ct->ct_cf;
        int error, b1 = CARDBUS_BASE0_REG, b2 = CARDBUS_BASE1_REG;

        if (csc->sc_acx_attached) {
                error = acx_detach(sc);
                if (error != 0)
                        return (error);
        }

        /* unhook the interrupt handler */
        if (csc->sc_ih != NULL) {
                cardbus_intr_disestablish(cc, cf, csc->sc_ih);
                csc->sc_ih = NULL;
        }

        /* release bus space and close window */
        if (csc->sc_iomapsize) {
                b1 = CARDBUS_BASE1_REG;
                b2 = CARDBUS_BASE2_REG;
        }
        Cardbus_mapreg_unmap(ct, b1, sc->sc_mem1_bt,
            sc->sc_mem1_bh, csc->sc_mapsize1);
        Cardbus_mapreg_unmap(ct, b2, sc->sc_mem2_bt,
            sc->sc_mem2_bh, csc->sc_mapsize2);
        if (csc->sc_iomapsize)
                Cardbus_mapreg_unmap(ct, CARDBUS_BASE0_REG, csc->sc_io_bt,
                    csc->sc_io_bh, csc->sc_iomapsize);

        return (0);
}

int
acx_cardbus_enable(struct acx_softc *sc)
{
        struct acx_cardbus_softc *csc;
        int error;

        csc = (struct acx_cardbus_softc *)sc;
        cardbus_devfunc_t ct = csc->sc_ct;
        cardbus_chipset_tag_t cc = ct->ct_cc;
        cardbus_function_tag_t cf = ct->ct_cf;

        /* power on the socket */
        error = Cardbus_function_enable(ct);
        if (error)
                return error;

        /* setup the PCI configuration registers */
        acx_cardbus_setup(csc);

        /* map and establish the interrupt handler */
        csc->sc_ih = cardbus_intr_establish(cc, cf, csc->sc_intrline, IPL_NET,
            acx_intr, sc, sc->sc_dev.dv_xname);
        if (csc->sc_ih == NULL) {
                printf("%s: could not establish interrupt at %d\n",
                    sc->sc_dev.dv_xname, csc->sc_intrline);
                Cardbus_function_disable(ct);
                return (1);
        }

        return (0);
}

void
acx_cardbus_disable(struct acx_softc *sc)
{
        struct acx_cardbus_softc *csc = (struct acx_cardbus_softc *)sc;
        cardbus_devfunc_t ct = csc->sc_ct;
        cardbus_chipset_tag_t cc = ct->ct_cc;
        cardbus_function_tag_t cf = ct->ct_cf;

        /* unhook the interrupt handler */
        cardbus_intr_disestablish(cc, cf, csc->sc_ih);
        csc->sc_ih = NULL;

        /* power down the socket */
        Cardbus_function_disable(ct);
}

void
acx_cardbus_power(struct acx_softc *sc, int why)
{
        struct acx_cardbus_softc *csc = (struct acx_cardbus_softc *)sc;

        if (why == DVACT_RESUME) {
                /* kick the PCI configuration registers */
                acx_cardbus_setup(csc);
        }
}

void
acx_cardbus_setup(struct acx_cardbus_softc *csc)
{
        cardbus_devfunc_t ct = csc->sc_ct;
        cardbus_chipset_tag_t cc = ct->ct_cc;
        pci_chipset_tag_t pc = csc->sc_pc;
        cardbus_function_tag_t cf = ct->ct_cf;
        pcireg_t reg;
        int b1 = CARDBUS_BASE0_REG, b2 = CARDBUS_BASE1_REG;

        if (csc->sc_iobar_val) {
                pci_conf_write(pc, csc->sc_tag, CARDBUS_BASE0_REG,
                    csc->sc_iobar_val);
                b1 = CARDBUS_BASE1_REG;
                b2 = CARDBUS_BASE2_REG;
                /* (*cf->cardbus_ctrl)(cc, CARDBUS_IO_ENABLE); */
        }

        /* program the BAR */
        pci_conf_write(pc, csc->sc_tag, b1, csc->sc_bar1_val);
        pci_conf_write(pc, csc->sc_tag, b2, csc->sc_bar2_val);

        /* make sure the right access type is on the cardbus bridge */
        (*cf->cardbus_ctrl)(cc, CARDBUS_MEM_ENABLE);
        (*cf->cardbus_ctrl)(cc, CARDBUS_BM_ENABLE);

        /* enable the appropriate bits in the PCI CSR */
        reg = pci_conf_read(pc, csc->sc_tag,
            PCI_COMMAND_STATUS_REG);
        reg |= PCI_COMMAND_MASTER_ENABLE | PCI_COMMAND_MEM_ENABLE;
#if 0
        if (csc->sc_iobar_val)
                reg |= PCI_COMMAND_IO_ENABLE;
#endif
        pci_conf_write(pc, csc->sc_tag, PCI_COMMAND_STATUS_REG,
            reg);
}