/*      $NetBSD: if_ral_cardbus.c,v 1.26 2022/09/25 17:33:19 thorpej Exp $      */
/*      $OpenBSD: if_ral_cardbus.c,v 1.6 2006/01/09 20:03:31 damien Exp $  */

/*-
* Copyright (c) 2005, 2006
*      Damien Bergamini <[email protected]>
*
* 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 Ralink RT2560/RT2561/RT2561S/RT2661 driver.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_ral_cardbus.c,v 1.26 2022/09/25 17:33:19 thorpej Exp $");


#include <sys/param.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <sys/device.h>

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

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

#include <netinet/in.h>

#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_amrr.h>
#include <net80211/ieee80211_rssadapt.h>
#include <net80211/ieee80211_radiotap.h>

#include <dev/ic/rt2560var.h>
#include <dev/ic/rt2661var.h>

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

#include <dev/cardbus/cardbusvar.h>

static struct ral_opns {
       int     (*attach)(void *, int);
       int     (*detach)(void *);
       int     (*intr)(void *);

}  ral_rt2560_opns = {
       rt2560_attach,
       rt2560_detach,
       rt2560_intr

}, ral_rt2661_opns = {
       rt2661_attach,
       rt2661_detach,
       rt2661_intr
};

struct ral_cardbus_softc {
       union {
               struct rt2560_softc     sc_rt2560;
               struct rt2661_softc     sc_rt2661;
       } u;
#define sc_sc   u.sc_rt2560

       /* cardbus specific goo */
       struct ral_opns         *sc_opns;
       cardbus_devfunc_t       sc_ct;
       pcitag_t                sc_tag;
       void                    *sc_ih;
       bus_size_t              sc_mapsize;
       pcireg_t                sc_bar_val;
};

int     ral_cardbus_match(device_t, cfdata_t, void *);
void    ral_cardbus_attach(device_t, device_t, void *);
int     ral_cardbus_detach(device_t, int);

CFATTACH_DECL_NEW(ral_cardbus, sizeof (struct ral_cardbus_softc),
   ral_cardbus_match, ral_cardbus_attach, ral_cardbus_detach, NULL);

int     ral_cardbus_enable(struct rt2560_softc *);
void    ral_cardbus_disable(struct rt2560_softc *);
void    ral_cardbus_power(struct rt2560_softc *, int);
void    ral_cardbus_setup(struct ral_cardbus_softc *);

int
ral_cardbus_match(device_t parent, cfdata_t cfdata, void *aux)
{
       struct cardbus_attach_args *ca = aux;

       if (PCI_VENDOR(ca->ca_id) == PCI_VENDOR_RALINK) {
               switch (PCI_PRODUCT(ca->ca_id)) {
               case PCI_PRODUCT_RALINK_RT2560:
               case PCI_PRODUCT_RALINK_RT2561:
               case PCI_PRODUCT_RALINK_RT2561S:
               case PCI_PRODUCT_RALINK_RT2661:
                       return 1;
               default:
                       return 0;
               }
       }

       return 0;
}

void
ral_cardbus_attach(device_t parent, device_t self, void *aux)
{
       struct ral_cardbus_softc *csc = device_private(self);
       struct rt2560_softc *sc = &csc->sc_sc;
       struct cardbus_attach_args *ca = aux;
       cardbus_devfunc_t ct = ca->ca_ct;
       char devinfo[256];
       bus_addr_t base;
       int error, revision;

       pci_devinfo(ca->ca_id, ca->ca_class, 0, devinfo, sizeof(devinfo));
       revision = PCI_REVISION(ca->ca_class);
       aprint_normal(": %s (rev. 0x%02x)\n", devinfo, revision);

       csc->sc_opns =
           (PCI_PRODUCT(ca->ca_id) == PCI_PRODUCT_RALINK_RT2560) ?
           &ral_rt2560_opns : &ral_rt2661_opns;

       sc->sc_dev = self;
       sc->sc_dmat = ca->ca_dmat;
       csc->sc_ct = ct;
       csc->sc_tag = ca->ca_tag;

       /* power management hooks */
       sc->sc_enable = ral_cardbus_enable;
       sc->sc_disable = ral_cardbus_disable;

       /* map control/status registers */
       error = Cardbus_mapreg_map(ct, PCI_BAR0,
           PCI_MAPREG_TYPE_MEM, 0, &sc->sc_st, &sc->sc_sh, &base,
           &csc->sc_mapsize);
       if (error != 0) {
               aprint_error(": could not map memory space\n");
               return;
       }

       csc->sc_bar_val = base | PCI_MAPREG_TYPE_MEM;

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

       (*csc->sc_opns->attach)(sc, PCI_PRODUCT(ca->ca_id));

       Cardbus_function_disable(ct);
}

int
ral_cardbus_detach(device_t self, int flags)
{
       struct ral_cardbus_softc *csc = device_private(self);
       struct rt2560_softc *sc = &csc->sc_sc;
       cardbus_devfunc_t ct = csc->sc_ct;
       int error;

       error = (*csc->sc_opns->detach)(sc);
       if (error != 0)
               return error;

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

       /* release bus space and close window */
       Cardbus_mapreg_unmap(ct, PCI_BAR0, sc->sc_st, sc->sc_sh,
           csc->sc_mapsize);

       return 0;
}

int
ral_cardbus_enable(struct rt2560_softc *sc)
{
       struct ral_cardbus_softc *csc = (struct ral_cardbus_softc *)sc;
       cardbus_devfunc_t ct = csc->sc_ct;

       /* power on the socket */
       Cardbus_function_enable(ct);

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

       /* map and establish the interrupt handler */
       csc->sc_ih = Cardbus_intr_establish(ct, IPL_NET,
           csc->sc_opns->intr, sc);
       if (csc->sc_ih == NULL) {
               aprint_error_dev(sc->sc_dev,
                                "could not establish interrupt\n");
               Cardbus_function_disable(ct);
               return 1;
       }

       return 0;
}

void
ral_cardbus_disable(struct rt2560_softc *sc)
{
       struct ral_cardbus_softc *csc = (struct ral_cardbus_softc *)sc;
       cardbus_devfunc_t ct = csc->sc_ct;

       /* unhook the interrupt handler */
       Cardbus_intr_disestablish(ct, csc->sc_ih);
       csc->sc_ih = NULL;

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

void
ral_cardbus_setup(struct ral_cardbus_softc *csc)
{
       cardbus_devfunc_t ct = csc->sc_ct;
       pcireg_t reg;

       /* program the BAR */
       Cardbus_conf_write(ct, csc->sc_tag, PCI_BAR0, csc->sc_bar_val);

       /* enable the appropriate bits in the PCI CSR */
       reg = Cardbus_conf_read(ct, csc->sc_tag, PCI_COMMAND_STATUS_REG);
       reg |= PCI_COMMAND_MASTER_ENABLE | PCI_COMMAND_MEM_ENABLE;
       Cardbus_conf_write(ct, csc->sc_tag, PCI_COMMAND_STATUS_REG, reg);
}

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