/*      $NetBSD: sni_emmc.c,v 1.10 2021/12/21 06:00:45 nisimura Exp $   */

/*-
 * Copyright (c) 2020 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Tohru Nishimura.
 *
 * 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.
 */

/*
 * Socionext SC2A11 SynQuacer eMMC driver
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sni_emmc.c,v 1.10 2021/12/21 06:00:45 nisimura Exp $");

#include <sys/param.h>
#include <sys/bus.h>
#include <sys/intr.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/kernel.h>
#include <sys/systm.h>

#include <machine/endian.h>

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

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

static int sniemmc_fdt_match(device_t, struct cfdata *, void *);
static void sniemmc_fdt_attach(device_t, device_t, void *);
static int sniemmc_acpi_match(device_t, struct cfdata *, void *);
static void sniemmc_acpi_attach(device_t, device_t, void *);

struct sniemmc_softc {
        struct sdhc_softc       sc;
        bus_space_tag_t         sc_iot;
        bus_space_handle_t      sc_ioh;
        bus_addr_t              sc_iob;
        bus_size_t              sc_ios;
        void                    *sc_ih;
        struct sdhc_host        *sc_hosts[1];
        bus_dmamap_t            sc_dmamap;
        bus_dma_segment_t       sc_segs[1];
        kcondvar_t              sc_cv;
        int                     sc_phandle;
};

CFATTACH_DECL_NEW(sniemmc_fdt, sizeof(struct sniemmc_softc),
    sniemmc_fdt_match, sniemmc_fdt_attach, NULL, NULL);

CFATTACH_DECL_NEW(sniemmc_acpi, sizeof(struct sniemmc_softc),
    sniemmc_acpi_match, sniemmc_acpi_attach, NULL, NULL);

static void sniemmc_attach_i(device_t);

static const struct device_compatible_entry compat_data[] = {
        { .compat = "socionext,synquacer-sdhci" },
        { .compat = "fujitsu,mb86s70-sdhci-3.0" },
        DEVICE_COMPAT_EOL
};
static const struct device_compatible_entry compatible[] = {
        { .compat = "SCX0002" },
        DEVICE_COMPAT_EOL
};

static int
sniemmc_fdt_match(device_t parent, struct cfdata *match, void *aux)
{
        struct fdt_attach_args * const faa = aux;

        return of_compatible_match(faa->faa_phandle, compat_data);
}

static void
sniemmc_fdt_attach(device_t parent, device_t self, void *aux)
{
        struct sniemmc_softc * const sc = device_private(self);
        struct fdt_attach_args * const faa = aux;
        const int phandle = faa->faa_phandle;
        bus_space_handle_t ioh;
        bus_addr_t addr;
        bus_size_t size;
        char intrstr[128];

        aprint_naive("\n");
        aprint_normal_dev(self, "Socionext eMMC controller\n");

        if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0
            || bus_space_map(faa->faa_bst, addr, size, 0, &ioh) != 0) {
                aprint_error_dev(self, "unable to map device\n");
                return;
        }
        if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
                aprint_error_dev(self, "failed to decode interrupt\n");
                goto fail;
        }
        sc->sc_ih = fdtbus_intr_establish(phandle, 0, IPL_SDMMC, 0,
            sdhc_intr, &sc->sc);
        if (sc->sc_ih == NULL) {
                aprint_error_dev(self, "couldn't establish interrupt on %s\n",
                    intrstr);
                goto fail;
        }
        aprint_normal_dev(self, "interrupting on %s\n", intrstr);

        sc->sc.sc_dev = self;
        sc->sc.sc_dmat = faa->faa_dmat;
        sc->sc.sc_host = sc->sc_hosts;
        sc->sc_iot = faa->faa_bst;
        sc->sc_ioh = ioh;
        sc->sc_iob = addr;
        sc->sc_ios = size;
        sc->sc_phandle = phandle;

        config_defer(self, sniemmc_attach_i);
        return;
 fail:
        bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_ios);
        return;
}

static int
sniemmc_acpi_match(device_t parent, struct cfdata *match, void *aux)
{
        struct acpi_attach_args *aa = aux;

        return acpi_compatible_match(aa, compatible);
}

static void
sniemmc_acpi_attach(device_t parent, device_t self, void *aux)
{
        struct sniemmc_softc * const sc = device_private(self);
        struct acpi_attach_args *aa = aux;
        ACPI_HANDLE handle = aa->aa_node->ad_handle;
        bus_space_handle_t ioh;
        struct acpi_resources res;
        struct acpi_mem *mem;
        struct acpi_irq *irq;
        ACPI_STATUS rv;

        aprint_naive("\n");
        aprint_normal(": Socionext eMMC controller\n");

        rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS",
            &res, &acpi_resource_parse_ops_default);
        if (ACPI_FAILURE(rv))
                return;
        mem = acpi_res_mem(&res, 0);
        irq = acpi_res_irq(&res, 0);
        if (mem == NULL || irq == NULL || mem->ar_length == 0) {
                aprint_error_dev(self, "incomplete resources\n");
                return;
        }
        if (bus_space_map(aa->aa_memt, mem->ar_base, mem->ar_length, 0,
            &ioh)) {
                aprint_error_dev(self, "couldn't map registers\n");
                return;
        }
        sc->sc_ih = acpi_intr_establish(self, (uint64_t)handle,
            IPL_BIO, false, sdhc_intr, &sc->sc, device_xname(self));
        if (sc->sc_ih == NULL) {
                aprint_error_dev(self, "couldn't establish interrupt\n");
                goto fail;
        }

        sc->sc.sc_dev = self;
        sc->sc.sc_dmat = aa->aa_dmat;
        sc->sc.sc_host = sc->sc_hosts;
        sc->sc_iot = aa->aa_memt;
        sc->sc_ioh = ioh;
        sc->sc_ios = mem->ar_length;
        sc->sc_phandle = 0;

        config_defer(self, sniemmc_attach_i);

        acpi_resource_cleanup(&res);
        return;
 fail:
        bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_ios);
        acpi_resource_cleanup(&res);
        return;
}

static void
sniemmc_attach_i(device_t self)
{
        struct sniemmc_softc * const sc = device_private(self);
        int error;

        sc->sc.sc_flags = 0;
        sc->sc.sc_flags |= SDHC_FLAG_32BIT_ACCESS;
        sc->sc.sc_clkbase = 50000;      /* Default to 50MHz */

        aprint_normal_dev(sc->sc.sc_dev, "doing sdhc_host() ...\n");
#if 0
        error = sdhc_host_found(&sc->sc, sc->sc_iot, sc->sc_ioh, sc->sc_ios);
#endif
        error = 0;
        if (error) {
                aprint_error_dev(self, "couldn't initialize host, error=%d\n",
                    error);
                goto fail;
        }
        return;
 fail:
        if (sc->sc_phandle)
                fdtbus_intr_disestablish(sc->sc_phandle, sc->sc_ih);
        else
                acpi_intr_disestablish(sc->sc_ih);
        sc->sc_ih = NULL;
        bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_ios);
        return;
}