/* $NetBSD: wb_acpi.c,v 1.7 2020/12/07 10:02:51 jmcneill Exp $ */

/*
* Copyright (c) 2009 Jared D. McNeill <[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. The name of the author may not be used to endorse or promote products
*    derived from this software without specific prior written permission.
*
* 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: wb_acpi.c,v 1.7 2020/12/07 10:02:51 jmcneill Exp $");

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

#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/acpi_intr.h>

#include <dev/ic/w83l518dvar.h>
#include <dev/ic/w83l518dreg.h>

#include <dev/isa/isadmavar.h>

#include <dev/sdmmc/sdmmcvar.h>

#define _COMPONENT      ACPI_RESOURCE_COMPONENT
ACPI_MODULE_NAME        ("wb_acpi")

static int      wb_acpi_match(device_t, cfdata_t, void *);
static void     wb_acpi_attach(device_t, device_t, void *);
static int      wb_acpi_detach(device_t, int);
static bool     wb_acpi_suspend(device_t, const pmf_qual_t *);
static bool     wb_acpi_resume(device_t, const pmf_qual_t *);

struct wb_acpi_softc {
       struct wb_softc sc_wb;
       isa_chipset_tag_t sc_ic;
       void *sc_ih;
       int sc_ioh_length;

       ACPI_HANDLE sc_crs, sc_srs;
       ACPI_BUFFER sc_crs_buffer;
};

CFATTACH_DECL_NEW(wb_acpi, sizeof(struct wb_acpi_softc),
   wb_acpi_match,
   wb_acpi_attach,
   wb_acpi_detach,
   NULL
);

static const char * const wb_acpi_ids[] = {
#if notyet
       "WEC0515",      /* Memory Stick interface */
#endif
       "WEC0517",      /* SD Memory Card interface */
       NULL
};

static int
wb_acpi_match(device_t parent, cfdata_t match, void *opaque)
{
       struct acpi_attach_args *aa = opaque;

       if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
               return 0;

       return acpi_match_hid(aa->aa_node->ad_devinfo, wb_acpi_ids);
}

static void
wb_acpi_attach(device_t parent, device_t self, void *opaque)
{
       struct wb_acpi_softc *sc = device_private(self);
       struct acpi_attach_args *aa = opaque;
       struct acpi_resources res;
       struct acpi_io *io;
       struct acpi_irq *irq;
       bus_space_handle_t ioh;
       ACPI_STATUS rv;

       sc->sc_ic = aa->aa_ic;

       rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS",
           &res, &acpi_resource_parse_ops_default);
       if (ACPI_FAILURE(rv))
               return;

       AcpiGetHandle(aa->aa_node->ad_handle, "_CRS", &sc->sc_crs);
       AcpiGetHandle(aa->aa_node->ad_handle, "_SRS", &sc->sc_srs);
       if (sc->sc_crs && sc->sc_srs) {
               sc->sc_crs_buffer.Pointer = NULL;
               sc->sc_crs_buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
               rv = AcpiGetCurrentResources(sc->sc_crs, &sc->sc_crs_buffer);
               if (ACPI_FAILURE(rv))
                       sc->sc_crs = sc->sc_srs = NULL;
       }

       io = acpi_res_io(&res, 0);
       irq = acpi_res_irq(&res, 0);
       if (io == NULL || irq == NULL) {
               aprint_error_dev(self, "incomplete resources\n");
               goto cleanup;
       }

       if (bus_space_map(aa->aa_iot, io->ar_base, io->ar_length, 0, &ioh)) {
               aprint_error_dev(self, "couldn't map registers\n");
               goto cleanup;
       }
       sc->sc_ioh_length = io->ar_length;

       sc->sc_ih = acpi_intr_establish(self,
           (uint64_t)(uintptr_t)aa->aa_node->ad_handle,
           IPL_SDMMC, false, wb_intr, &sc->sc_wb, device_xname(self));
       if (sc->sc_ih == NULL) {
               aprint_error_dev(self,
                   "couldn't establish interrupt handler\n");
               goto cleanup;
       }

       sc->sc_wb.wb_dev = self;
       sc->sc_wb.wb_type = WB_DEVNO_SD;
       sc->sc_wb.wb_iot = aa->aa_iot;
       sc->sc_wb.wb_ioh = ioh;
       sc->sc_wb.wb_irq = irq->ar_irq;
       sc->sc_wb.wb_base = io->ar_base;
       wb_attach(&sc->sc_wb);

       pmf_device_register(self, wb_acpi_suspend, wb_acpi_resume);

cleanup:
       acpi_resource_cleanup(&res);
}

static int
wb_acpi_detach(device_t self, int flags)
{
       struct wb_acpi_softc *sc = device_private(self);
       int rv;

       pmf_device_deregister(self);

       if (sc->sc_crs_buffer.Pointer)
               ACPI_FREE(sc->sc_crs_buffer.Pointer);

       rv = wb_detach(&sc->sc_wb, flags);
       if (rv)
               return rv;

       if (sc->sc_ih)
               acpi_intr_disestablish(sc->sc_ih);

       if (sc->sc_ioh_length > 0)
               bus_space_unmap(sc->sc_wb.wb_iot, sc->sc_wb.wb_ioh,
                   sc->sc_ioh_length);

       return 0;
}

static bool
wb_acpi_suspend(device_t self, const pmf_qual_t *qual)
{
       struct wb_acpi_softc *sc = device_private(self);

       return wb_suspend(&sc->sc_wb);
}

static bool
wb_acpi_resume(device_t self, const pmf_qual_t *qual)
{
       struct wb_acpi_softc *sc = device_private(self);
       ACPI_STATUS rv;

       if (sc->sc_crs && sc->sc_srs) {
               rv = AcpiSetCurrentResources(sc->sc_srs, &sc->sc_crs_buffer);
               if (ACPI_FAILURE(rv))
                       printf("%s: _SRS failed: %s\n",
                           device_xname(self), AcpiFormatException(rv));
       }

       return wb_resume(&sc->sc_wb);
}

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