17593f8612
- Use bus reference phandles in place of FDT offsets as IRQ domain keys - Unify the identical macio/fdt/mambo OpenPIC drivers into one - Be more forgiving (following ePAPR) about what we need from the device tree to identify an OpenPIC - Correctly map all IRQs into an interrupt domain - Set IRQ_*_CONFORM for interrupts on an unknown PIC type instead of failing attachment for that device.
170 lines
4.2 KiB
C
170 lines
4.2 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)
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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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OF_setprop(sb, "bus-frequency", (void *)&freq, sizeof(freq));
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}
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struct fdt_fixup_entry fdt_fixup_table[] = {
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{ "fsl,MPC8572DS", &fdt_fixup_busfreq },
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{ "MPC8555CDS", &fdt_fixup_busfreq },
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{ NULL, NULL }
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};
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static int
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fdt_pic_decode_iic(phandle_t node, pcell_t *intr, int *interrupt, int *trig,
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int *pol)
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{
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if (!fdt_is_compatible(node, "chrp,iic"))
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return (ENXIO);
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*interrupt = intr[0];
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switch (intr[1]) {
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case 0:
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/* Active L level */
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*trig = INTR_TRIGGER_LEVEL;
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*pol = INTR_POLARITY_LOW;
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break;
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case 1:
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/* Active H level */
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*trig = INTR_TRIGGER_LEVEL;
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*pol = INTR_POLARITY_HIGH;
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break;
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case 2:
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/* H to L edge */
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*trig = INTR_TRIGGER_EDGE;
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*pol = INTR_POLARITY_LOW;
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break;
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case 3:
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/* L to H edge */
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*trig = INTR_TRIGGER_EDGE;
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*pol = INTR_POLARITY_HIGH;
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break;
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default:
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*trig = INTR_TRIGGER_CONFORM;
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*pol = INTR_POLARITY_CONFORM;
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}
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return (0);
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}
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static int
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fdt_pic_decode_openpic(phandle_t node, pcell_t *intr, int *interrupt,
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int *trig, int *pol)
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{
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if (!fdt_is_compatible(node, "chrp,open-pic") &&
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!fdt_is_type(node, "open-pic"))
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return (ENXIO);
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/*
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* XXX The interrupt number read out from the MPC85XX device tree is
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* already offset by 16 to reflect the 'internal' IRQ range shift on
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* the OpenPIC.
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*/
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*interrupt = intr[0];
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switch (intr[1]) {
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case 0:
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/* L to H edge */
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*trig = INTR_TRIGGER_EDGE;
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*pol = INTR_POLARITY_HIGH;
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break;
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case 1:
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/* Active L level */
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*trig = INTR_TRIGGER_LEVEL;
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*pol = INTR_POLARITY_LOW;
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break;
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case 2:
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/* Active H level */
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*trig = INTR_TRIGGER_LEVEL;
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*pol = INTR_POLARITY_HIGH;
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break;
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case 3:
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/* H to L edge */
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*trig = INTR_TRIGGER_EDGE;
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*pol = INTR_POLARITY_LOW;
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break;
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default:
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*trig = INTR_TRIGGER_CONFORM;
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*pol = INTR_POLARITY_CONFORM;
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}
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return (0);
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}
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fdt_pic_decode_t fdt_pic_table[] = {
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&fdt_pic_decode_iic,
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&fdt_pic_decode_openpic,
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NULL
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};
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