/*      $NetBSD: sdhc_cardbus.c,v 1.6 2019/11/10 21:16:34 chs Exp $     */

/*
* Copyright (c) 2010 NONAKA Kimihiro <[email protected]>
* All rights reserved.
*
* 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 AUTHOR ``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 AUTHOR 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: sdhc_cardbus.c,v 1.6 2019/11/10 21:16:34 chs Exp $");

#ifdef _KERNEL_OPT
#include "opt_sdmmc.h"
#endif

#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/pmf.h>

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

#include <dev/sdmmc/sdhcreg.h>
#include <dev/sdmmc/sdhcvar.h>
#include <dev/sdmmc/sdmmcvar.h>

/* PCI interface classes */
#define SDHC_PCI_INTERFACE_NO_DMA       0x00
#define SDHC_PCI_INTERFACE_DMA          0x01
#define SDHC_PCI_INTERFACE_VENDOR       0x02

/*
* 8-bit PCI configuration register that tells us how many slots there
* are and which BAR entry corresponds to the first slot.
*/
#define SDHC_PCI_CONF_SLOT_INFO         0x40
#define SDHC_PCI_NUM_SLOTS(info)        ((((info) >> 4) & 0x7) + 1)
#define SDHC_PCI_FIRST_BAR(info)        ((info) & 0x7)

struct sdhc_cardbus_softc {
       struct sdhc_softc sc;
       cardbus_chipset_tag_t sc_cc;
       cardbus_function_tag_t sc_cf;
       cardbus_devfunc_t sc_ct;
       pcitag_t sc_tag;
       bus_space_tag_t sc_iot;         /* CardBus I/O space tag */
       bus_space_tag_t sc_memt;        /* CardBus MEM space tag */

       void *sc_ih;
};

static int sdhc_cardbus_match(device_t, cfdata_t, void *);
static void sdhc_cardbus_attach(device_t, device_t, void *);
static int sdhc_cardbus_detach(device_t, int);

CFATTACH_DECL_NEW(sdhc_cardbus, sizeof(struct sdhc_cardbus_softc),
   sdhc_cardbus_match, sdhc_cardbus_attach, sdhc_cardbus_detach, NULL);

#ifdef SDHC_DEBUG
#define DPRINTF(s)      printf s
#else
#define DPRINTF(s)      /**/
#endif

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

       if (PCI_CLASS(ca->ca_class) == PCI_CLASS_SYSTEM &&
           PCI_SUBCLASS(ca->ca_class) == PCI_SUBCLASS_SYSTEM_SDHC)
               return 3;

       return 0;
}

static void
sdhc_cardbus_attach(device_t parent, device_t self, void *aux)
{
       struct sdhc_cardbus_softc *sc = device_private(self);
       struct cardbus_attach_args *ca = aux;
       cardbus_devfunc_t ct = ca->ca_ct;
       cardbus_chipset_tag_t cc = ct->ct_cc;
       cardbus_function_tag_t cf = ct->ct_cf;
       pcireg_t csr;
       pcireg_t slotinfo;
       char devinfo[256];
       int nslots;
       bus_space_tag_t iot;
       bus_space_handle_t ioh;
       bus_size_t size;

       sc->sc.sc_dev = self;
       sc->sc.sc_dmat = ca->ca_dmat;
       sc->sc.sc_host = NULL;

       sc->sc_cc = cc;
       sc->sc_cf = cf;
       sc->sc_ct = ct;
       sc->sc_tag = ca->ca_tag;

       sc->sc_iot = ca->ca_iot;
       sc->sc_memt = ca->ca_memt;

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

       /*
        * Map and attach all hosts supported by the host controller.
        */
       slotinfo = Cardbus_conf_read(ct, ca->ca_tag, SDHC_PCI_CONF_SLOT_INFO);
       nslots = SDHC_PCI_NUM_SLOTS(slotinfo);
       KASSERT(nslots == 1);

       /* Allocate an array big enough to hold all the possible hosts */
       sc->sc.sc_host = malloc(sizeof(struct sdhc_host *) * nslots,
           M_DEVBUF, M_WAITOK | M_ZERO);

       /* Enable the device. */
       csr = Cardbus_conf_read(ct, ca->ca_tag, PCI_COMMAND_STATUS_REG);
       Cardbus_conf_write(ct, ca->ca_tag, PCI_COMMAND_STATUS_REG,
           csr | PCI_COMMAND_MASTER_ENABLE | PCI_COMMAND_MEM_ENABLE);

       /* Establish the interrupt. */
       sc->sc_ih = Cardbus_intr_establish(ct, IPL_SDMMC, sdhc_intr, &sc->sc);
       if (sc->sc_ih == NULL) {
               aprint_error_dev(self, "couldn't establish interrupt\n");
               goto err;
       }

       /* Enable use of DMA if supported by the interface. */
       if ((PCI_INTERFACE(ca->ca_class) == SDHC_PCI_INTERFACE_DMA))
               SET(sc->sc.sc_flags, SDHC_FLAG_USE_DMA);

       if (Cardbus_mapreg_map(ct, PCI_MAPREG_START, PCI_MAPREG_TYPE_MEM, 0,
           &iot, &ioh, NULL, &size)) {
               aprint_error_dev(self, "couldn't map register\n");
               goto err;
       }

       if (sdhc_host_found(&sc->sc, iot, ioh, size) != 0) {
               aprint_error_dev(self, "couldn't initialize host\n");
               goto err;
       }

       if (!pmf_device_register1(self, sdhc_suspend, sdhc_resume,
           sdhc_shutdown)) {
               aprint_error_dev(self, "couldn't establish powerhook\n");
       }

       return;

err:
       if (sc->sc_ih != NULL)
               Cardbus_intr_disestablish(ct, sc->sc_ih);
       if (sc->sc.sc_host != NULL)
               free(sc->sc.sc_host, M_DEVBUF);
}

static int
sdhc_cardbus_detach(device_t self, int flags)
{
       struct sdhc_cardbus_softc *sc = device_private(self);
       struct cardbus_devfunc *ct = sc->sc_ct;
       int rv;

       rv = sdhc_detach(&sc->sc, flags);
       if (rv)
               return rv;
       if (sc->sc_ih != NULL) {
               Cardbus_intr_disestablish(ct, sc->sc_ih);
               sc->sc_ih = NULL;
       }
       if (sc->sc.sc_host != NULL) {
               free(sc->sc.sc_host, M_DEVBUF);
               sc->sc.sc_host = NULL;
       }
       return 0;
}

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