143 lines
3.8 KiB
C
143 lines
3.8 KiB
C
/*-
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* Copyright (c) 2009-2010 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Semihalf under sponsorship from
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* the FreeBSD Foundation.
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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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, 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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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/intr_machdep.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/ofw/openfirm.h>
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#include "ofw_bus_if.h"
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#include "fdt_common.h"
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static void
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fdt_fixup_busfreq(phandle_t root, uint32_t div)
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{
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phandle_t sb, cpus, child;
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pcell_t freq;
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/*
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* Do a strict check so as to skip non-SOC nodes, which also claim
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* simple-bus compatibility such as eLBC etc.
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*/
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if ((sb = fdt_find_compatible(root, "simple-bus", 1)) == 0)
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return;
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/*
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* This fixup uses /cpus/ bus-frequency prop value to set simple-bus
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* bus-frequency property.
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*/
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if ((cpus = OF_finddevice("/cpus")) == -1)
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return;
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if ((child = OF_child(cpus)) == 0)
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return;
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if (OF_getprop(child, "bus-frequency", (void *)&freq,
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sizeof(freq)) <= 0)
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return;
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if (div == 0)
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return;
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freq /= div;
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OF_setprop(sb, "bus-frequency", (void *)&freq, sizeof(freq));
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}
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static void
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fdt_fixup_busfreq_mpc85xx(phandle_t root)
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{
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fdt_fixup_busfreq(root, 1);
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}
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static void
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fdt_fixup_busfreq_dpaa(phandle_t root)
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{
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fdt_fixup_busfreq(root, 2);
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}
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static void
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fdt_fixup_fman(phandle_t root)
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{
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phandle_t node;
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pcell_t freq;
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if ((node = fdt_find_compatible(root, "simple-bus", 1)) == 0)
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return;
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if (OF_getprop(node, "bus-frequency", (void *)&freq,
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sizeof(freq)) <= 0)
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return;
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/*
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* Set clock-frequency for FMan nodes (only on QorIQ DPAA targets).
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* That frequency is equal to /soc node bus-frequency.
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*/
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for (node = OF_child(node); node != 0; node = OF_peer(node)) {
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if (ofw_bus_node_is_compatible(node, "fsl,fman") == 0)
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continue;
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if (OF_setprop(node, "clock-frequency", (void *)&freq,
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sizeof(freq)) == -1) {
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/*
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* XXX Shall we take some actions if no clock-frequency
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* property was found?
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*/
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}
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}
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}
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struct fdt_fixup_entry fdt_fixup_table[] = {
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{ "fsl,MPC8572DS", &fdt_fixup_busfreq_mpc85xx },
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{ "MPC8555CDS", &fdt_fixup_busfreq_mpc85xx },
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{ "fsl,P2020", &fdt_fixup_busfreq_mpc85xx },
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{ "fsl,P2041RDB", &fdt_fixup_busfreq_dpaa },
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{ "fsl,P2041RDB", &fdt_fixup_fman },
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{ "fsl,P3041DS", &fdt_fixup_busfreq_dpaa },
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{ "fsl,P3041DS", &fdt_fixup_fman },
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{ "fsl,P5020DS", &fdt_fixup_busfreq_dpaa },
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{ "fsl,P5020DS", &fdt_fixup_fman },
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{ "varisys,CYRUS", &fdt_fixup_busfreq_dpaa },
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{ "varisys,CYRUS", &fdt_fixup_fman },
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{ NULL, NULL }
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};
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