121 lines
3.3 KiB
C
121 lines
3.3 KiB
C
/* $NetBSD: fdt_mmc_pwrseq.c,v 1.2 2018/06/30 20:34:43 jmcneill Exp $ */
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/*-
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* Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: fdt_mmc_pwrseq.c,v 1.2 2018/06/30 20:34:43 jmcneill Exp $");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/kmem.h>
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#include <sys/queue.h>
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#include <libfdt.h>
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#include <dev/fdt/fdtvar.h>
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struct fdtbus_mmc_pwrseq {
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device_t mps_dev;
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int mps_phandle;
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const struct fdtbus_mmc_pwrseq_func *mps_funcs;
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LIST_ENTRY(fdtbus_mmc_pwrseq) mps_next;
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};
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static LIST_HEAD(, fdtbus_mmc_pwrseq) fdtbus_mmc_pwrseqs =
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LIST_HEAD_INITIALIZER(fdtbus_mmc_pwrseqs);
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int
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fdtbus_register_mmc_pwrseq(device_t dev, int phandle,
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const struct fdtbus_mmc_pwrseq_func *funcs)
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{
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struct fdtbus_mmc_pwrseq *mps;
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mps = kmem_alloc(sizeof(*mps), KM_SLEEP);
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mps->mps_dev = dev;
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mps->mps_phandle = phandle;
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mps->mps_funcs = funcs;
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LIST_INSERT_HEAD(&fdtbus_mmc_pwrseqs, mps, mps_next);
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return 0;
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}
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static struct fdtbus_mmc_pwrseq *
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fdtbus_get_mmc_pwrseq(int phandle)
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{
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struct fdtbus_mmc_pwrseq *mps;
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LIST_FOREACH(mps, &fdtbus_mmc_pwrseqs, mps_next) {
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if (mps->mps_phandle == phandle)
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return mps;
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}
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return NULL;
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}
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struct fdtbus_mmc_pwrseq *
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fdtbus_mmc_pwrseq_get(int phandle)
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{
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const u_int *p;
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int mps_phandle;
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p = fdtbus_get_prop(phandle, "mmc-pwrseq", NULL);
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if (p == NULL)
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return NULL;
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mps_phandle = fdtbus_get_phandle_from_native(be32toh(p[0]));
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return fdtbus_get_mmc_pwrseq(mps_phandle);
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}
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void
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fdtbus_mmc_pwrseq_pre_power_on(struct fdtbus_mmc_pwrseq *mps)
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{
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if (mps->mps_funcs->pre_power_on)
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mps->mps_funcs->pre_power_on(mps->mps_dev);
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}
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void
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fdtbus_mmc_pwrseq_post_power_on(struct fdtbus_mmc_pwrseq *mps)
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{
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if (mps->mps_funcs->post_power_on)
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mps->mps_funcs->post_power_on(mps->mps_dev);
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}
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void
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fdtbus_mmc_pwrseq_power_off(struct fdtbus_mmc_pwrseq *mps)
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{
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if (mps->mps_funcs->power_off)
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mps->mps_funcs->power_off(mps->mps_dev);
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}
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void
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fdtbus_mmc_pwrseq_reset(struct fdtbus_mmc_pwrseq *mps)
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{
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if (mps->mps_funcs->reset)
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mps->mps_funcs->reset(mps->mps_dev);
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}
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