/* $NetBSD: if_atw_cardbus.c,v 1.37 2022/09/25 17:33:19 thorpej Exp $ */

/*-
* Copyright (c) 1999, 2000, 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.  This code was adapted for the ADMtek ADM8211
* by David Young.
*
* 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.
*/

/*
* CardBus bus front-end for the ADMtek ADM8211 802.11 MAC/BBP driver.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_atw_cardbus.c,v 1.37 2022/09/25 17:33:19 thorpej Exp $");

#include "opt_inet.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/device.h>

#include <machine/endian.h>

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

#include <net80211/ieee80211_netbsd.h>
#include <net80211/ieee80211_radiotap.h>
#include <net80211/ieee80211_var.h>

#ifdef INET
#include <netinet/in.h>
#include <netinet/if_inarp.h>
#endif


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

#include <dev/ic/atwreg.h>
#include <dev/ic/rf3000reg.h>
#include <dev/ic/si4136reg.h>
#include <dev/ic/atwvar.h>

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

#include <dev/cardbus/cardbusvar.h>
#include <dev/pci/pcidevs.h>

/*
* PCI configuration space registers used by the ADM8211.
*/
#define ATW_PCI_IOBA PCI_BAR(0) /* i/o mapped base */
#define ATW_PCI_MMBA PCI_BAR(1) /* memory mapped base */

struct atw_cardbus_softc {
       struct atw_softc sc_atw;

       /* CardBus-specific goo. */
       void                    *sc_ih;         /* interrupt handle */
       cardbus_devfunc_t       sc_ct;          /* our CardBus devfuncs */
       pcitag_t                sc_tag;         /* our CardBus tag */
       pcireg_t                sc_csr;         /* CSR bits */
       bus_size_t              sc_mapsize;     /* the size of mapped bus space
                                                * region
                                                */

       int                     sc_bar_reg;     /* which BAR to use */
       pcireg_t                sc_bar_val;     /* value of the BAR */
};

static int      atw_cardbus_match(device_t, cfdata_t, void *);
static void     atw_cardbus_attach(device_t, device_t, void *);
static int      atw_cardbus_detach(device_t, int);

CFATTACH_DECL3_NEW(atw_cardbus, sizeof(struct atw_cardbus_softc),
   atw_cardbus_match, atw_cardbus_attach, atw_cardbus_detach, atw_activate,
   NULL, NULL, DVF_DETACH_SHUTDOWN);

static void     atw_cardbus_setup(struct atw_cardbus_softc *);

static bool     atw_cardbus_suspend(device_t, const pmf_qual_t *);
static bool     atw_cardbus_resume(device_t, const pmf_qual_t *);

static const struct atw_cardbus_product *atw_cardbus_lookup
  (const struct cardbus_attach_args *);

static const struct atw_cardbus_product {
       u_int32_t        acp_vendor;    /* PCI vendor ID */
       u_int32_t        acp_product;   /* PCI product ID */
       const char      *acp_product_name;
} atw_cardbus_products[] = {
       { PCI_VENDOR_ADMTEK,            PCI_PRODUCT_ADMTEK_ADM8211,
         "ADMtek ADM8211 802.11 MAC/BBP" },

       { 0,                            0,      NULL },
};

static const struct atw_cardbus_product *
atw_cardbus_lookup(const struct cardbus_attach_args *ca)
{
       const struct atw_cardbus_product *acp;

       for (acp = atw_cardbus_products; acp->acp_product_name != NULL; acp++) {
               if (PCI_VENDOR(ca->ca_id) == acp->acp_vendor &&
                   PCI_PRODUCT(ca->ca_id) == acp->acp_product)
                       return acp;
       }
       return NULL;
}

static int
atw_cardbus_match(device_t parent, cfdata_t match, void *aux)
{
       struct cardbus_attach_args *ca = aux;

       if (atw_cardbus_lookup(ca) != NULL)
               return 1;

       return 0;
}

static void
atw_cardbus_attach(device_t parent, device_t self, void *aux)
{
       struct atw_cardbus_softc *csc = device_private(self);
       struct atw_softc *sc = &csc->sc_atw;
       struct cardbus_attach_args *ca = aux;
       cardbus_devfunc_t ct = ca->ca_ct;
       const struct atw_cardbus_product *acp;
#if 0
       int i;
#define FUNCREG(__x)    {#__x, (__x)}
       struct {
               const char *name;
               bus_size_t ofs;
       } funcregs[] = {
               FUNCREG(ATW_FER), FUNCREG(ATW_FEMR), FUNCREG(ATW_FPSR),
               FUNCREG(ATW_FFER)
       };
#undef FUNCREG
#endif
       bus_addr_t adr;

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

       acp = atw_cardbus_lookup(ca);
       if (acp == NULL) {
               printf("\n");
               panic("atw_cardbus_attach: impossible");
       }

       /* Get revision info. */
       sc->sc_rev = PCI_REVISION(ca->ca_class);

       printf(": %s, revision %d.%d\n", acp->acp_product_name,
           (sc->sc_rev >> 4) & 0xf, sc->sc_rev & 0xf);

#if 0
       printf("%s: signature %08x\n", device_xname(self),
           (rev >> 4) & 0xf, rev & 0xf,
           Cardbus_conf_read(ct, csc->sc_tag, 0x80));
#endif

       /*
        * Map the device.
        */
       csc->sc_csr = PCI_COMMAND_MASTER_ENABLE |
                     PCI_COMMAND_PARITY_ENABLE |
                     PCI_COMMAND_SERR_ENABLE;
       if (Cardbus_mapreg_map(ct, ATW_PCI_MMBA,
           PCI_MAPREG_TYPE_MEM, 0, &sc->sc_st, &sc->sc_sh, &adr,
           &csc->sc_mapsize) == 0) {
#if 0
               printf("%s: atw_cardbus_attach mapped %d bytes mem space\n",
                   device_xname(self), csc->sc_mapsize);
#endif
               csc->sc_csr |= PCI_COMMAND_MEM_ENABLE;
               csc->sc_bar_reg = ATW_PCI_MMBA;
               csc->sc_bar_val = adr | PCI_MAPREG_TYPE_MEM;
       } else if (Cardbus_mapreg_map(ct, ATW_PCI_IOBA,
           PCI_MAPREG_TYPE_IO, 0, &sc->sc_st, &sc->sc_sh, &adr,
           &csc->sc_mapsize) == 0) {
#if 0
               printf("%s: atw_cardbus_attach mapped %d bytes I/O space\n",
                   device_xname(self), csc->sc_mapsize);
#endif
               csc->sc_csr |= PCI_COMMAND_IO_ENABLE;
               csc->sc_bar_reg = ATW_PCI_IOBA;
               csc->sc_bar_val = adr | PCI_MAPREG_TYPE_IO;
       } else {
               aprint_error_dev(self, "unable to map device registers\n");
               return;
       }

       /*
        * Bring the chip out of powersave mode and initialize the
        * configuration registers.
        */
       atw_cardbus_setup(csc);

#if 0
       /*
        * The CardBus cards will make it to store-and-forward mode as
        * soon as you put them under any kind of load, so just start
        * out there.
        */
       sc->sc_txthresh = 3; /* TBD name constant */
#endif

#if 0
       for (i = 0; i < __arraycount(funcregs); i++) {
               aprint_error_dev(sc->sc_dev, "%s %" PRIx32 "\n",
                   funcregs[i].name, ATW_READ(sc, funcregs[i].ofs));
       }
#endif

       ATW_WRITE(sc, ATW_FEMR, 0);
       ATW_WRITE(sc, ATW_FER, ATW_READ(sc, ATW_FER));

       /*
        * Bus-independent attach.
        */
       atw_attach(sc);

       if (pmf_device_register1(sc->sc_dev, atw_cardbus_suspend,
           atw_cardbus_resume, atw_shutdown))
               pmf_class_network_register(sc->sc_dev, &sc->sc_if);
       else
               aprint_error_dev(sc->sc_dev,
                   "couldn't establish power handler\n");

       /*
        * Power down the socket.
        */
       pmf_device_suspend(sc->sc_dev, &sc->sc_qual);
}

static int
atw_cardbus_detach(device_t self, int flags)
{
       struct atw_cardbus_softc *csc = device_private(self);
       struct atw_softc *sc = &csc->sc_atw;
       struct cardbus_devfunc *ct = csc->sc_ct;
       int rv;

#if defined(DIAGNOSTIC)
       if (ct == NULL)
               panic("%s: data structure lacks", device_xname(self));
#endif

       rv = atw_detach(sc);
       if (rv != 0)
               return rv;

       /*
        * Unhook the interrupt handler.
        */
       if (csc->sc_ih != NULL)
               Cardbus_intr_disestablish(ct, csc->sc_ih);

       /*
        * Release bus space and close window.
        */
       if (csc->sc_bar_reg != 0)
               Cardbus_mapreg_unmap(ct, csc->sc_bar_reg,
                   sc->sc_st, sc->sc_sh, csc->sc_mapsize);

       return 0;
}

static bool
atw_cardbus_resume(device_t self, const pmf_qual_t *qual)
{
       struct atw_cardbus_softc *csc = device_private(self);
       struct atw_softc *sc = &csc->sc_atw;
       cardbus_devfunc_t ct = csc->sc_ct;

       /*
        * Map and establish the interrupt.
        */
       csc->sc_ih = Cardbus_intr_establish(ct, IPL_NET, atw_intr, sc);
       if (csc->sc_ih == NULL) {
               aprint_error_dev(sc->sc_dev, "unable to establish interrupt\n");
               return false;
       }

       return true;
}

static bool
atw_cardbus_suspend(device_t self, const pmf_qual_t *qual)
{
       struct atw_cardbus_softc *csc = device_private(self);
       cardbus_devfunc_t ct = csc->sc_ct;

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

       return atw_suspend(self, qual);
}

static void
atw_cardbus_setup(struct atw_cardbus_softc *csc)
{
       cardbus_devfunc_t ct = csc->sc_ct;
       pcireg_t csr;
       int rc;

       if ((rc = cardbus_set_powerstate(ct, csc->sc_tag, PCI_PWR_D0)) != 0)
               aprint_debug("%s: cardbus_set_powerstate %d\n", __func__, rc);

       /* Program the BAR. */
       Cardbus_conf_write(ct, csc->sc_tag, csc->sc_bar_reg,
           csc->sc_bar_val);

       /* Enable the appropriate bits in the PCI CSR. */
       csr = Cardbus_conf_read(ct, csc->sc_tag, PCI_COMMAND_STATUS_REG);
       csr &= ~(PCI_COMMAND_IO_ENABLE|PCI_COMMAND_MEM_ENABLE);
       csr |= csc->sc_csr;
       Cardbus_conf_write(ct, csc->sc_tag, PCI_COMMAND_STATUS_REG, csr);
}

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