/* $NetBSD: fdt_mmc_pwrseq.c,v 1.2 2018/06/30 20:34:43 jmcneill Exp $ */

/*-
* Copyright (c) 2017 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: fdt_mmc_pwrseq.c,v 1.2 2018/06/30 20:34:43 jmcneill Exp $");

#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kmem.h>
#include <sys/queue.h>

#include <libfdt.h>
#include <dev/fdt/fdtvar.h>

struct fdtbus_mmc_pwrseq {
       device_t mps_dev;
       int mps_phandle;
       const struct fdtbus_mmc_pwrseq_func *mps_funcs;

       LIST_ENTRY(fdtbus_mmc_pwrseq) mps_next;
};

static LIST_HEAD(, fdtbus_mmc_pwrseq) fdtbus_mmc_pwrseqs =
   LIST_HEAD_INITIALIZER(fdtbus_mmc_pwrseqs);

int
fdtbus_register_mmc_pwrseq(device_t dev, int phandle,
   const struct fdtbus_mmc_pwrseq_func *funcs)
{
       struct fdtbus_mmc_pwrseq *mps;

       mps = kmem_alloc(sizeof(*mps), KM_SLEEP);
       mps->mps_dev = dev;
       mps->mps_phandle = phandle;
       mps->mps_funcs = funcs;

       LIST_INSERT_HEAD(&fdtbus_mmc_pwrseqs, mps, mps_next);

       return 0;
}

static struct fdtbus_mmc_pwrseq *
fdtbus_get_mmc_pwrseq(int phandle)
{
       struct fdtbus_mmc_pwrseq *mps;

       LIST_FOREACH(mps, &fdtbus_mmc_pwrseqs, mps_next) {
               if (mps->mps_phandle == phandle)
                       return mps;
       }

       return NULL;
}

struct fdtbus_mmc_pwrseq *
fdtbus_mmc_pwrseq_get(int phandle)
{
       const u_int *p;
       int mps_phandle;

       p = fdtbus_get_prop(phandle, "mmc-pwrseq", NULL);
       if (p == NULL)
               return NULL;

       mps_phandle = fdtbus_get_phandle_from_native(be32toh(p[0]));
       return fdtbus_get_mmc_pwrseq(mps_phandle);
}

void
fdtbus_mmc_pwrseq_pre_power_on(struct fdtbus_mmc_pwrseq *mps)
{
       if (mps->mps_funcs->pre_power_on)
               mps->mps_funcs->pre_power_on(mps->mps_dev);
}

void
fdtbus_mmc_pwrseq_post_power_on(struct fdtbus_mmc_pwrseq *mps)
{
       if (mps->mps_funcs->post_power_on)
               mps->mps_funcs->post_power_on(mps->mps_dev);
}

void
fdtbus_mmc_pwrseq_power_off(struct fdtbus_mmc_pwrseq *mps)
{
       if (mps->mps_funcs->power_off)
               mps->mps_funcs->power_off(mps->mps_dev);
}

void
fdtbus_mmc_pwrseq_reset(struct fdtbus_mmc_pwrseq *mps)
{
       if (mps->mps_funcs->reset)
               mps->mps_funcs->reset(mps->mps_dev);
}