Author: raj
Date: Sun Jul 11 20:49:36 2010
New Revision: 209906
URL: http://svn.freebsd.org/changeset/base/209906
Log:
Introduce PowerPC-specific helper routines for FDT.
Reviewed by: imp
Sponsored by: The FreeBSD Foundation
Added:
head/sys/dev/fdt/fdt_powerpc.c (contents, props changed)
Added: head/sys/dev/fdt/fdt_powerpc.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/fdt/fdt_powerpc.c Sun Jul 11 20:49:36 2010
(r209906)
@@ -0,0 +1,168 @@
+/*-
+ * Copyright (c) 2009-2010 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Semihalf under sponsorship from
+ * the FreeBSD Foundation.
+ *
+ * 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 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 AUTHOR 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>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+
+#include <machine/intr_machdep.h>
+
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+#include <dev/ofw/openfirm.h>
+
+#include "ofw_bus_if.h"
+#include "fdt_common.h"
+
+static void
+fdt_fixup_busfreq(phandle_t root)
+{
+ phandle_t sb, cpus, child;
+ pcell_t freq;
+
+ /*
+ * Do a strict check so as to skip non-SOC nodes, which also claim
+ * simple-bus compatibility such as eLBC etc.
+ */
+ if ((sb = fdt_find_compatible(root, "simple-bus", 1)) == 0)
+ return;
+
+ /*
+ * This fixup uses /cpus/ bus-frequency prop value to set simple-bus
+ * bus-frequency property.
+ */
+ if ((cpus = OF_finddevice("/cpus")) == 0)
+ return;
+
+ if ((child = OF_child(cpus)) == 0)
+ return;
+
+ if (OF_getprop(child, "bus-frequency", (void *)&freq,
+ sizeof(freq)) <= 0)
+ return;
+
+ OF_setprop(sb, "bus-frequency", (void *)&freq, sizeof(freq));
+}
+
+struct fdt_fixup_entry fdt_fixup_table[] = {
+ { "fsl,MPC8572DS", &fdt_fixup_busfreq },
+ { "MPC8555CDS", &fdt_fixup_busfreq },
+ { NULL, NULL }
+};
+
+static int
+fdt_pic_decode_iic(phandle_t node, pcell_t *intr, int *interrupt, int *trig,
+ int *pol)
+{
+ if (!fdt_is_compatible(node, "chrp,iic"))
+ return (ENXIO);
+
+ *interrupt = intr[0];
+
+ switch (intr[1]) {
+ case 0:
+ /* Active L level */
+ *trig = INTR_TRIGGER_LEVEL;
+ *pol = INTR_POLARITY_LOW;
+ break;
+ case 1:
+ /* Active H level */
+ *trig = INTR_TRIGGER_LEVEL;
+ *pol = INTR_POLARITY_HIGH;
+ break;
+ case 2:
+ /* H to L edge */
+ *trig = INTR_TRIGGER_EDGE;
+ *pol = INTR_POLARITY_LOW;
+ break;
+ case 3:
+ /* L to H edge */
+ *trig = INTR_TRIGGER_EDGE;
+ *pol = INTR_POLARITY_HIGH;
+ break;
+ default:
+ *trig = INTR_TRIGGER_CONFORM;
+ *pol = INTR_POLARITY_CONFORM;
+ }
+ return (0);
+}
+
+static int
+fdt_pic_decode_openpic(phandle_t node, pcell_t *intr, int *interrupt,
+ int *trig, int *pol)
+{
+
+ if (!fdt_is_compatible(node, "chrp,open-pic"))
+ return (ENXIO);
+
+ /*
+ * XXX The interrupt number read out from the MPC85XX device tree is
+ * already offset by 16 to reflect the 'internal' IRQ range shift on
+ * the OpenPIC.
+ */
+ *interrupt = intr[0];
+
+ switch (intr[1]) {
+ case 0:
+ /* L to H edge */
+ *trig = INTR_TRIGGER_EDGE;
+ *pol = INTR_POLARITY_HIGH;
+ break;
+ case 1:
+ /* Active L level */
+ *trig = INTR_TRIGGER_LEVEL;
+ *pol = INTR_POLARITY_LOW;
+ break;
+ case 2:
+ /* Active H level */
+ *trig = INTR_TRIGGER_LEVEL;
+ *pol = INTR_POLARITY_HIGH;
+ break;
+ case 3:
+ /* H to L edge */
+ *trig = INTR_TRIGGER_EDGE;
+ *pol = INTR_POLARITY_LOW;
+ break;
+ default:
+ *trig = INTR_TRIGGER_CONFORM;
+ *pol = INTR_POLARITY_CONFORM;
+ }
+ return (0);
+}
+
+fdt_pic_decode_t fdt_pic_table[] = {
+ &fdt_pic_decode_iic,
+ &fdt_pic_decode_openpic,
+ NULL
+};
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