ed03d62a4c
If a fixup really is needed, it should be fixed in u-boot, not in FreeBSD. Suggested by: nwhitehorn
503 lines
12 KiB
C
503 lines
12 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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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/kernel.h>
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#include <sys/malloc.h>
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#include <sys/systm.h>
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#include <contrib/libfdt/libfdt.h>
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#include <machine/stdarg.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/ofwvar.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include "ofw_if.h"
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#ifdef DEBUG
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#define debugf(fmt, args...) do { printf("%s(): ", __func__); \
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printf(fmt,##args); } while (0)
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#else
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#define debugf(fmt, args...)
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#endif
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#if defined(__arm__)
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#if defined(SOC_MV_ARMADAXP) || defined(SOC_MV_ARMADA38X) || \
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defined(SOC_MV_DISCOVERY) || defined(SOC_MV_DOVE) || \
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defined(SOC_MV_FREY) || defined(SOC_MV_KIRKWOOD) || \
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defined(SOC_MV_LOKIPLUS) || defined(SOC_MV_ORION)
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#define FDT_MARVELL
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#endif
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#endif
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static int ofw_fdt_init(ofw_t, void *);
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static phandle_t ofw_fdt_peer(ofw_t, phandle_t);
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static phandle_t ofw_fdt_child(ofw_t, phandle_t);
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static phandle_t ofw_fdt_parent(ofw_t, phandle_t);
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static phandle_t ofw_fdt_instance_to_package(ofw_t, ihandle_t);
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static ssize_t ofw_fdt_getproplen(ofw_t, phandle_t, const char *);
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static ssize_t ofw_fdt_getprop(ofw_t, phandle_t, const char *, void *, size_t);
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static int ofw_fdt_nextprop(ofw_t, phandle_t, const char *, char *, size_t);
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static int ofw_fdt_setprop(ofw_t, phandle_t, const char *, const void *,
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size_t);
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static ssize_t ofw_fdt_canon(ofw_t, const char *, char *, size_t);
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static phandle_t ofw_fdt_finddevice(ofw_t, const char *);
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static ssize_t ofw_fdt_instance_to_path(ofw_t, ihandle_t, char *, size_t);
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static ssize_t ofw_fdt_package_to_path(ofw_t, phandle_t, char *, size_t);
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static int ofw_fdt_interpret(ofw_t, const char *, int, cell_t *);
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static ofw_method_t ofw_fdt_methods[] = {
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OFWMETHOD(ofw_init, ofw_fdt_init),
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OFWMETHOD(ofw_peer, ofw_fdt_peer),
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OFWMETHOD(ofw_child, ofw_fdt_child),
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OFWMETHOD(ofw_parent, ofw_fdt_parent),
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OFWMETHOD(ofw_instance_to_package, ofw_fdt_instance_to_package),
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OFWMETHOD(ofw_getproplen, ofw_fdt_getproplen),
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OFWMETHOD(ofw_getprop, ofw_fdt_getprop),
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OFWMETHOD(ofw_nextprop, ofw_fdt_nextprop),
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OFWMETHOD(ofw_setprop, ofw_fdt_setprop),
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OFWMETHOD(ofw_canon, ofw_fdt_canon),
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OFWMETHOD(ofw_finddevice, ofw_fdt_finddevice),
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OFWMETHOD(ofw_instance_to_path, ofw_fdt_instance_to_path),
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OFWMETHOD(ofw_package_to_path, ofw_fdt_package_to_path),
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OFWMETHOD(ofw_interpret, ofw_fdt_interpret),
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{ 0, 0 }
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};
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static ofw_def_t ofw_fdt = {
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OFW_FDT,
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ofw_fdt_methods,
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0
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};
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OFW_DEF(ofw_fdt);
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static void *fdtp = NULL;
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static int
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sysctl_handle_dtb(SYSCTL_HANDLER_ARGS)
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{
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return (sysctl_handle_opaque(oidp, fdtp, fdt_totalsize(fdtp), req));
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}
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static void
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sysctl_register_fdt_oid(void *arg)
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{
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/* If there is no FDT registered, skip adding the sysctl */
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if (fdtp == NULL)
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return;
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SYSCTL_ADD_PROC(NULL, SYSCTL_STATIC_CHILDREN(_hw_fdt), OID_AUTO, "dtb",
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CTLTYPE_OPAQUE | CTLFLAG_RD, NULL, 0, sysctl_handle_dtb, "",
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"Device Tree Blob");
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}
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SYSINIT(dtb_oid, SI_SUB_KMEM, SI_ORDER_ANY, sysctl_register_fdt_oid, 0);
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static int
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ofw_fdt_init(ofw_t ofw, void *data)
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{
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int err;
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/* Check FDT blob integrity */
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if ((err = fdt_check_header(data)) != 0)
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return (err);
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fdtp = data;
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return (0);
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}
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/*
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* Device tree functions.
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*
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* We use the offset from fdtp to the node as the 'phandle' in OF interface.
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*
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* phandle is a u32 value, therefore we cannot use the pointer to node as
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* phandle in 64 bit. We also do not use the usual fdt offset as phandle,
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* as it can be 0, and the OF interface has special meaning for phandle 0.
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*/
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static phandle_t
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fdt_offset_phandle(int offset)
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{
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if (offset < 0)
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return (0);
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return ((phandle_t)offset + fdt_off_dt_struct(fdtp));
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}
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static int
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fdt_phandle_offset(phandle_t p)
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{
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int pint = (int)p;
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int dtoff = fdt_off_dt_struct(fdtp);
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if (pint < dtoff)
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return (-1);
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return (pint - dtoff);
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}
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/* Return the next sibling of this node or 0. */
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static phandle_t
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ofw_fdt_peer(ofw_t ofw, phandle_t node)
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{
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int depth, offset;
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if (node == 0) {
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/* Find root node */
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offset = fdt_path_offset(fdtp, "/");
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return (fdt_offset_phandle(offset));
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}
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offset = fdt_phandle_offset(node);
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if (offset < 0)
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return (0);
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for (depth = 1, offset = fdt_next_node(fdtp, offset, &depth);
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offset >= 0;
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offset = fdt_next_node(fdtp, offset, &depth)) {
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if (depth < 0)
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return (0);
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if (depth == 1)
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return (fdt_offset_phandle(offset));
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}
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return (0);
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}
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/* Return the first child of this node or 0. */
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static phandle_t
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ofw_fdt_child(ofw_t ofw, phandle_t node)
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{
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int depth, offset;
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offset = fdt_phandle_offset(node);
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if (offset < 0)
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return (0);
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for (depth = 0, offset = fdt_next_node(fdtp, offset, &depth);
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(offset >= 0) && (depth > 0);
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offset = fdt_next_node(fdtp, offset, &depth)) {
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if (depth < 0)
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return (0);
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if (depth == 1)
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return (fdt_offset_phandle(offset));
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}
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return (0);
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}
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/* Return the parent of this node or 0. */
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static phandle_t
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ofw_fdt_parent(ofw_t ofw, phandle_t node)
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{
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int offset, paroffset;
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offset = fdt_phandle_offset(node);
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if (offset < 0)
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return (0);
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paroffset = fdt_parent_offset(fdtp, offset);
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return (fdt_offset_phandle(paroffset));
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}
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/* Return the package handle that corresponds to an instance handle. */
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static phandle_t
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ofw_fdt_instance_to_package(ofw_t ofw, ihandle_t instance)
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{
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/* Where real OF uses ihandles in the tree, FDT uses xref phandles */
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return (OF_node_from_xref(instance));
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}
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/* Get the length of a property of a package. */
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static ssize_t
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ofw_fdt_getproplen(ofw_t ofw, phandle_t package, const char *propname)
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{
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const void *prop;
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int offset, len;
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offset = fdt_phandle_offset(package);
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if (offset < 0)
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return (-1);
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len = -1;
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prop = fdt_getprop(fdtp, offset, propname, &len);
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if (prop == NULL && strcmp(propname, "name") == 0) {
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/* Emulate the 'name' property */
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fdt_get_name(fdtp, offset, &len);
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return (len + 1);
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}
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if (prop == NULL && offset == fdt_path_offset(fdtp, "/chosen")) {
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if (strcmp(propname, "fdtbootcpu") == 0)
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return (sizeof(cell_t));
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if (strcmp(propname, "fdtmemreserv") == 0)
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return (sizeof(uint64_t)*2*fdt_num_mem_rsv(fdtp));
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}
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if (prop == NULL)
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return (-1);
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return (len);
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}
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/* Get the value of a property of a package. */
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static ssize_t
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ofw_fdt_getprop(ofw_t ofw, phandle_t package, const char *propname, void *buf,
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size_t buflen)
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{
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const void *prop;
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const char *name;
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int len, offset;
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uint32_t cpuid;
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offset = fdt_phandle_offset(package);
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if (offset < 0)
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return (-1);
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prop = fdt_getprop(fdtp, offset, propname, &len);
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if (prop == NULL && strcmp(propname, "name") == 0) {
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/* Emulate the 'name' property */
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name = fdt_get_name(fdtp, offset, &len);
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strncpy(buf, name, buflen);
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if (len + 1 > buflen)
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len = buflen;
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return (len + 1);
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}
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if (prop == NULL && offset == fdt_path_offset(fdtp, "/chosen")) {
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if (strcmp(propname, "fdtbootcpu") == 0) {
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cpuid = cpu_to_fdt32(fdt_boot_cpuid_phys(fdtp));
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len = sizeof(cpuid);
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prop = &cpuid;
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}
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if (strcmp(propname, "fdtmemreserv") == 0) {
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prop = (char *)fdtp + fdt_off_mem_rsvmap(fdtp);
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len = sizeof(uint64_t)*2*fdt_num_mem_rsv(fdtp);
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}
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}
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if (prop == NULL)
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return (-1);
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if (len > buflen)
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len = buflen;
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bcopy(prop, buf, len);
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return (len);
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}
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/*
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* Get the next property of a package. Return values:
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* -1: package or previous property does not exist
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* 0: no more properties
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* 1: success
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*/
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static int
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ofw_fdt_nextprop(ofw_t ofw, phandle_t package, const char *previous, char *buf,
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size_t size)
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{
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const void *prop;
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const char *name;
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int offset;
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offset = fdt_phandle_offset(package);
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if (offset < 0)
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return (-1);
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/* Find the first prop in the node */
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offset = fdt_first_property_offset(fdtp, offset);
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if (offset < 0)
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return (0); /* No properties */
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if (previous != NULL) {
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while (offset >= 0) {
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prop = fdt_getprop_by_offset(fdtp, offset, &name, NULL);
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if (prop == NULL)
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return (-1); /* Internal error */
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offset = fdt_next_property_offset(fdtp, offset);
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if (offset < 0)
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return (0); /* No more properties */
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/* Check if the last one was the one we wanted */
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if (strcmp(name, previous) == 0)
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break;
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}
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}
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prop = fdt_getprop_by_offset(fdtp, offset, &name, &offset);
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if (prop == NULL)
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return (-1); /* Internal error */
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strncpy(buf, name, size);
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return (1);
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}
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/* Set the value of a property of a package. */
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static int
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ofw_fdt_setprop(ofw_t ofw, phandle_t package, const char *propname,
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const void *buf, size_t len)
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{
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int offset;
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offset = fdt_phandle_offset(package);
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if (offset < 0)
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return (-1);
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if (fdt_setprop_inplace(fdtp, offset, propname, buf, len) != 0)
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/* Try to add property, when setting value inplace failed */
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return (fdt_setprop(fdtp, offset, propname, buf, len));
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return (0);
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}
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/* Convert a device specifier to a fully qualified pathname. */
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static ssize_t
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ofw_fdt_canon(ofw_t ofw, const char *device, char *buf, size_t len)
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{
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return (-1);
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}
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/* Return a package handle for the specified device. */
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static phandle_t
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ofw_fdt_finddevice(ofw_t ofw, const char *device)
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{
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int offset;
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offset = fdt_path_offset(fdtp, device);
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if (offset < 0)
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return (-1);
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return (fdt_offset_phandle(offset));
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}
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/* Return the fully qualified pathname corresponding to an instance. */
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static ssize_t
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ofw_fdt_instance_to_path(ofw_t ofw, ihandle_t instance, char *buf, size_t len)
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{
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phandle_t phandle;
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phandle = OF_instance_to_package(instance);
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if (phandle == -1)
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return (-1);
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return (OF_package_to_path(phandle, buf, len));
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}
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/* Return the fully qualified pathname corresponding to a package. */
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static ssize_t
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ofw_fdt_package_to_path(ofw_t ofw, phandle_t package, char *buf, size_t len)
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{
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return (-1);
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}
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#if defined(FDT_MARVELL)
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static int
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ofw_fdt_fixup(ofw_t ofw)
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{
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#define FDT_MODEL_LEN 80
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char model[FDT_MODEL_LEN];
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phandle_t root;
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ssize_t len;
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int i;
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if ((root = ofw_fdt_finddevice(ofw, "/")) == -1)
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return (ENODEV);
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if ((len = ofw_fdt_getproplen(ofw, root, "model")) <= 0)
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return (0);
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bzero(model, FDT_MODEL_LEN);
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if (ofw_fdt_getprop(ofw, root, "model", model, FDT_MODEL_LEN) <= 0)
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return (0);
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/*
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* Search fixup table and call handler if appropriate.
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*/
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for (i = 0; fdt_fixup_table[i].model != NULL; i++) {
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if (strncmp(model, fdt_fixup_table[i].model,
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FDT_MODEL_LEN) != 0)
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/*
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* Sometimes it's convenient to provide one
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* fixup entry that refers to many boards.
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* To handle this case, simply check if model
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* is compatible parameter
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*/
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if(!ofw_bus_node_is_compatible(root,
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fdt_fixup_table[i].model))
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continue;
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if (fdt_fixup_table[i].handler != NULL)
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(*fdt_fixup_table[i].handler)(root);
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}
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return (0);
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}
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#endif
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static int
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ofw_fdt_interpret(ofw_t ofw, const char *cmd, int nret, cell_t *retvals)
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{
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#if defined(FDT_MARVELL)
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int rv;
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/*
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* Note: FDT does not have the possibility to 'interpret' commands,
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* but we abuse the interface a bit to use it for doing non-standard
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* operations on the device tree blob.
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*
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* Currently the only supported 'command' is to trigger performing
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* fixups.
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*/
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if (strncmp("perform-fixup", cmd, 13) != 0)
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return (0);
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rv = ofw_fdt_fixup(ofw);
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if (nret > 0)
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retvals[0] = rv;
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return (rv);
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#else
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return (0);
|
|
#endif
|
|
}
|