/* $NetBSD: genet_acpi.c,v 1.6 2024/09/15 08:30:01 skrll Exp $ */

/*-
* Copyright (c) 2020 Jared 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. 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: genet_acpi.c,v 1.6 2024/09/15 08:30:01 skrll Exp $");

#include <sys/param.h>
#include <sys/bus.h>
#include <sys/cpu.h>
#include <sys/device.h>

#include <sys/rndsource.h>

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

#include <dev/mii/miivar.h>

#include <dev/ic/bcmgenetvar.h>

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

static const struct device_compatible_entry compat_data[] = {
       { .compat = "BCM6E4E" },        /* Broadcom GENET v5 */
       DEVICE_COMPAT_EOL
};

static int      genet_acpi_match(device_t, cfdata_t, void *);
static void     genet_acpi_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(genet_acpi, sizeof(struct genet_softc),
   genet_acpi_match, genet_acpi_attach, NULL, NULL);

static int
genet_acpi_match(device_t parent, cfdata_t cf, void *aux)
{
       struct acpi_attach_args *aa = aux;

       return acpi_compatible_match(aa, compat_data);
}

static void
genet_acpi_attach(device_t parent, device_t self, void *aux)
{
       struct genet_softc * const sc = device_private(self);
       struct acpi_attach_args *aa = aux;
       ACPI_HANDLE handle = aa->aa_node->ad_handle;
       struct acpi_resources res;
       struct acpi_mem *mem;
       struct acpi_irq *irq;
       char *phy_mode;
       ACPI_STATUS rv;
       int error;
       void *ih;

       sc->sc_dev = self;

       rv = acpi_resource_parse(sc->sc_dev, handle, "_CRS",
           &res, &acpi_resource_parse_ops_default);
       if (ACPI_FAILURE(rv))
               return;

       mem = acpi_res_mem(&res, 0);
       if (mem == NULL) {
               aprint_error_dev(self, "couldn't find mem resource\n");
               goto done;
       }

       irq = acpi_res_irq(&res, 0);
       if (irq == NULL) {
               aprint_error_dev(self, "couldn't find irq resource\n");
               goto done;
       }

       sc->sc_bst = aa->aa_memt;
       error = bus_space_map(sc->sc_bst, mem->ar_base, mem->ar_length,
           0, &sc->sc_bsh);
       if (error != 0) {
               aprint_error_dev(self, "couldn't map registers\n");
               goto done;
       }
       sc->sc_dmat = BUS_DMA_TAG_VALID(aa->aa_dmat64) ?
           aa->aa_dmat64 : aa->aa_dmat;
       sc->sc_phy_id = MII_PHY_ANY;

       rv = acpi_dsd_string(handle, "phy-mode", &phy_mode);
       if (ACPI_FAILURE(rv)) {
               aprint_error_dev(self, "missing 'phy-mode' property\n");
               goto done;
       }

       if (strcmp(phy_mode, "rgmii-rxid") == 0)
               sc->sc_phy_mode = GENET_PHY_MODE_RGMII_RXID;
       else if (strcmp(phy_mode, "rgmii-txid") == 0)
               sc->sc_phy_mode = GENET_PHY_MODE_RGMII_TXID;
       else if (strcmp(phy_mode, "rgmii-id") == 0)
               sc->sc_phy_mode = GENET_PHY_MODE_RGMII_ID;
       else if (strcmp(phy_mode, "rgmii") == 0)
               sc->sc_phy_mode = GENET_PHY_MODE_RGMII;
       else {
               aprint_error(": unsupported phy-mode '%s'\n", phy_mode);
               goto done;
       }

       aprint_normal("%s", device_xname(self));
       if (genet_attach(sc) != 0)
               goto done;

       ih = acpi_intr_establish(self, (uint64_t)(uintptr_t)handle, IPL_NET,
           true, genet_intr, sc, device_xname(self));
       if (ih == NULL) {
               aprint_error_dev(self, "couldn't establish interrupt\n");
               goto done;
       }

done:
       acpi_resource_cleanup(&res);
}