/* $NetBSD: cdnsiic_fdt.c,v 1.1 2022/11/05 17:31:37 jmcneill Exp $ */

/*-
* Copyright (c) 2022 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 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.
*/

#include <sys/cdefs.h>

__KERNEL_RCSID(0, "$NetBSD: cdnsiic_fdt.c,v 1.1 2022/11/05 17:31:37 jmcneill Exp $");

#include <sys/param.h>
#include <sys/bus.h>
#include <sys/device.h>
#include <sys/intr.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <sys/kmem.h>

#include <dev/i2c/i2cvar.h>

#include <dev/fdt/fdtvar.h>
#include <dev/ic/cdnsiicvar.h>

static const struct device_compatible_entry compat_data[] = {
       { .compat = "cdns,i2c-r1p10" },
       { .compat = "cdns,i2c-r1p14" },
       DEVICE_COMPAT_EOL
};

static int
cdnsiic_fdt_match(device_t parent, cfdata_t cf, void *aux)
{
       struct fdt_attach_args * const faa = aux;

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

static void
cdnsiic_fdt_attach(device_t parent, device_t self, void *aux)
{
       struct cdnsiic_softc * const sc = device_private(self);
       struct fdt_attach_args * const faa = aux;
       const int phandle = faa->faa_phandle;
       bus_addr_t addr;
       bus_size_t size;
       int error;

       if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
               aprint_error(": couldn't get registers\n");
               return;
       }

       sc->sc_pclk = fdtbus_clock_get_index(phandle, 0);
       if (sc->sc_pclk == NULL || clk_enable(sc->sc_pclk) != 0) {
               aprint_error(": couldn't enable pclk\n");
               return;
       }

       if (of_getprop_uint32(phandle, "clock-frequency", &sc->sc_bus_freq))
               sc->sc_bus_freq = 100000;

       sc->sc_dev = self;
       sc->sc_bst = faa->faa_bst;
       if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) {
               aprint_error(": couldn't map registers\n");
               return;
       }

       error = cdnsiic_attach(sc);
       if (error != 0) {
               aprint_error_dev(self, "init failed, error = %d\n", error);
               return;
       }

       fdtbus_register_i2c_controller(&sc->sc_ic, phandle);

       fdtbus_attach_i2cbus(self, phandle, &sc->sc_ic, iicbus_print);
}

CFATTACH_DECL_NEW(cdnsiic_fdt, sizeof(struct cdnsiic_softc),
   cdnsiic_fdt_match, cdnsiic_fdt_attach, NULL, NULL);