743 lines
16 KiB
C
743 lines
16 KiB
C
/*-
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* Copyright (c) 2009-2014 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Andrew Turner under sponsorship from
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* the FreeBSD Foundation.
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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 <sys/limits.h>
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#include <sys/sysctl.h>
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#include <machine/resource.h>
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#include <dev/fdt/fdt_common.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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#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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#define FDT_COMPAT_LEN 255
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#define FDT_TYPE_LEN 64
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#define FDT_REG_CELLS 4
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SYSCTL_NODE(_hw, OID_AUTO, fdt, CTLFLAG_RD, 0, "Flattened Device Tree");
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vm_paddr_t fdt_immr_pa;
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vm_offset_t fdt_immr_va;
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vm_offset_t fdt_immr_size;
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struct fdt_ic_list fdt_ic_list_head = SLIST_HEAD_INITIALIZER(fdt_ic_list_head);
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static int fdt_is_compatible(phandle_t, const char *);
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static int
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fdt_get_range_by_busaddr(phandle_t node, u_long addr, u_long *base,
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u_long *size)
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{
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pcell_t ranges[32], *rangesptr;
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pcell_t addr_cells, size_cells, par_addr_cells;
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u_long bus_addr, par_bus_addr, pbase, psize;
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int err, i, len, tuple_size, tuples;
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if (node == 0) {
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*base = 0;
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*size = ULONG_MAX;
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return (0);
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}
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if ((fdt_addrsize_cells(node, &addr_cells, &size_cells)) != 0)
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return (ENXIO);
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/*
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* Process 'ranges' property.
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*/
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par_addr_cells = fdt_parent_addr_cells(node);
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if (par_addr_cells > 2) {
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return (ERANGE);
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}
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len = OF_getproplen(node, "ranges");
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if (len < 0)
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return (-1);
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if (len > sizeof(ranges))
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return (ENOMEM);
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if (len == 0) {
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return (fdt_get_range_by_busaddr(OF_parent(node), addr,
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base, size));
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}
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if (OF_getprop(node, "ranges", ranges, sizeof(ranges)) <= 0)
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return (EINVAL);
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tuple_size = addr_cells + par_addr_cells + size_cells;
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tuples = len / (tuple_size * sizeof(cell_t));
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if (par_addr_cells > 2 || addr_cells > 2 || size_cells > 2)
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return (ERANGE);
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*base = 0;
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*size = 0;
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for (i = 0; i < tuples; i++) {
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rangesptr = &ranges[i * tuple_size];
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bus_addr = fdt_data_get((void *)rangesptr, addr_cells);
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if (bus_addr != addr)
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continue;
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rangesptr += addr_cells;
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par_bus_addr = fdt_data_get((void *)rangesptr, par_addr_cells);
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rangesptr += par_addr_cells;
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err = fdt_get_range_by_busaddr(OF_parent(node), par_bus_addr,
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&pbase, &psize);
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if (err > 0)
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return (err);
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if (err == 0)
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*base = pbase;
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else
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*base = par_bus_addr;
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*size = fdt_data_get((void *)rangesptr, size_cells);
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return (0);
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}
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return (EINVAL);
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}
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int
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fdt_get_range(phandle_t node, int range_id, u_long *base, u_long *size)
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{
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pcell_t ranges[6], *rangesptr;
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pcell_t addr_cells, size_cells, par_addr_cells;
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u_long par_bus_addr, pbase, psize;
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int err, len, tuple_size, tuples;
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if ((fdt_addrsize_cells(node, &addr_cells, &size_cells)) != 0)
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return (ENXIO);
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/*
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* Process 'ranges' property.
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*/
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par_addr_cells = fdt_parent_addr_cells(node);
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if (par_addr_cells > 2)
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return (ERANGE);
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len = OF_getproplen(node, "ranges");
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if (len > sizeof(ranges))
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return (ENOMEM);
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if (len == 0) {
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*base = 0;
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*size = ULONG_MAX;
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return (0);
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}
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if (!(range_id < len))
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return (ERANGE);
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if (OF_getprop(node, "ranges", ranges, sizeof(ranges)) <= 0)
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return (EINVAL);
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tuple_size = sizeof(pcell_t) * (addr_cells + par_addr_cells +
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size_cells);
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tuples = len / tuple_size;
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if (par_addr_cells > 2 || addr_cells > 2 || size_cells > 2)
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return (ERANGE);
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*base = 0;
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*size = 0;
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rangesptr = &ranges[range_id];
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*base = fdt_data_get((void *)rangesptr, addr_cells);
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rangesptr += addr_cells;
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par_bus_addr = fdt_data_get((void *)rangesptr, par_addr_cells);
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rangesptr += par_addr_cells;
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err = fdt_get_range_by_busaddr(OF_parent(node), par_bus_addr,
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&pbase, &psize);
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if (err == 0)
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*base += pbase;
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else
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*base += par_bus_addr;
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*size = fdt_data_get((void *)rangesptr, size_cells);
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return (0);
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}
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int
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fdt_immr_addr(vm_offset_t immr_va)
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{
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phandle_t node;
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u_long base, size;
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int r;
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/*
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* Try to access the SOC node directly i.e. through /aliases/.
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*/
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if ((node = OF_finddevice("soc")) != 0)
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if (fdt_is_compatible(node, "simple-bus"))
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goto moveon;
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/*
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* Find the node the long way.
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*/
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if ((node = OF_finddevice("/")) == 0)
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return (ENXIO);
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if ((node = fdt_find_compatible(node, "simple-bus", 0)) == 0)
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return (ENXIO);
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moveon:
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if ((r = fdt_get_range(node, 0, &base, &size)) == 0) {
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fdt_immr_pa = base;
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fdt_immr_va = immr_va;
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fdt_immr_size = size;
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}
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return (r);
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}
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/*
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* This routine is an early-usage version of the ofw_bus_is_compatible() when
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* the ofw_bus I/F is not available (like early console routines and similar).
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* Note the buffer has to be on the stack since malloc() is usually not
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* available in such cases either.
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*/
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static int
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fdt_is_compatible(phandle_t node, const char *compatstr)
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{
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char buf[FDT_COMPAT_LEN];
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char *compat;
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int len, onelen, l, rv;
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if ((len = OF_getproplen(node, "compatible")) <= 0)
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return (0);
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compat = (char *)&buf;
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bzero(compat, FDT_COMPAT_LEN);
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if (OF_getprop(node, "compatible", compat, FDT_COMPAT_LEN) < 0)
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return (0);
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onelen = strlen(compatstr);
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rv = 0;
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while (len > 0) {
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if (strncasecmp(compat, compatstr, onelen) == 0) {
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/* Found it. */
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rv = 1;
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break;
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}
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/* Slide to the next sub-string. */
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l = strlen(compat) + 1;
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compat += l;
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len -= l;
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}
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return (rv);
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}
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int
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fdt_is_compatible_strict(phandle_t node, const char *compatible)
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{
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char compat[FDT_COMPAT_LEN];
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if (OF_getproplen(node, "compatible") <= 0)
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return (0);
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if (OF_getprop(node, "compatible", compat, FDT_COMPAT_LEN) < 0)
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return (0);
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if (strncasecmp(compat, compatible, FDT_COMPAT_LEN) == 0)
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/* This fits. */
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return (1);
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return (0);
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}
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phandle_t
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fdt_find_compatible(phandle_t start, const char *compat, int strict)
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{
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phandle_t child;
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/*
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* Traverse all children of 'start' node, and find first with
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* matching 'compatible' property.
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*/
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for (child = OF_child(start); child != 0; child = OF_peer(child))
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if (fdt_is_compatible(child, compat)) {
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if (strict)
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if (!fdt_is_compatible_strict(child, compat))
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continue;
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return (child);
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}
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return (0);
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}
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phandle_t
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fdt_depth_search_compatible(phandle_t start, const char *compat, int strict)
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{
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phandle_t child, node;
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/*
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* Depth-search all descendants of 'start' node, and find first with
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* matching 'compatible' property.
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*/
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for (node = OF_child(start); node != 0; node = OF_peer(node)) {
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if (fdt_is_compatible(node, compat) &&
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(strict == 0 || fdt_is_compatible_strict(node, compat))) {
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return (node);
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}
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child = fdt_depth_search_compatible(node, compat, strict);
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if (child != 0)
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return (child);
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}
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return (0);
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}
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int
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fdt_is_enabled(phandle_t node)
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{
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char *stat;
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int ena, len;
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len = OF_getprop_alloc(node, "status", sizeof(char),
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(void **)&stat);
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if (len <= 0)
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/* It is OK if no 'status' property. */
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return (1);
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/* Anything other than 'okay' means disabled. */
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ena = 0;
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if (strncmp((char *)stat, "okay", len) == 0)
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ena = 1;
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OF_prop_free(stat);
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return (ena);
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}
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int
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fdt_is_type(phandle_t node, const char *typestr)
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{
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char type[FDT_TYPE_LEN];
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if (OF_getproplen(node, "device_type") <= 0)
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return (0);
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if (OF_getprop(node, "device_type", type, FDT_TYPE_LEN) < 0)
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return (0);
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if (strncasecmp(type, typestr, FDT_TYPE_LEN) == 0)
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/* This fits. */
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return (1);
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return (0);
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}
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int
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fdt_parent_addr_cells(phandle_t node)
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{
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pcell_t addr_cells;
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/* Find out #address-cells of the superior bus. */
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if (OF_searchprop(OF_parent(node), "#address-cells", &addr_cells,
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sizeof(addr_cells)) <= 0)
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return (2);
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return ((int)fdt32_to_cpu(addr_cells));
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}
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int
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fdt_pm_is_enabled(phandle_t node)
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{
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int ret;
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ret = 1;
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#if defined(SOC_MV_KIRKWOOD) || defined(SOC_MV_DISCOVERY)
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ret = fdt_pm(node);
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#endif
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return (ret);
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}
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u_long
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fdt_data_get(void *data, int cells)
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{
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if (cells == 1)
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return (fdt32_to_cpu(*((uint32_t *)data)));
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return (fdt64_to_cpu(*((uint64_t *)data)));
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}
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int
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fdt_addrsize_cells(phandle_t node, int *addr_cells, int *size_cells)
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{
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pcell_t cell;
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int cell_size;
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/*
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* Retrieve #{address,size}-cells.
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*/
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cell_size = sizeof(cell);
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if (OF_getencprop(node, "#address-cells", &cell, cell_size) < cell_size)
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*addr_cells = 2;
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*addr_cells = (int)cell;
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if (OF_getencprop(node, "#size-cells", &cell, cell_size) < cell_size)
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cell = 1;
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*size_cells = (int)cell;
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if (*addr_cells > 3 || *size_cells > 2)
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return (ERANGE);
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return (0);
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}
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int
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fdt_data_to_res(pcell_t *data, int addr_cells, int size_cells, u_long *start,
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u_long *count)
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{
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/* Address portion. */
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if (addr_cells > 2)
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return (ERANGE);
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*start = fdt_data_get((void *)data, addr_cells);
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data += addr_cells;
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|
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/* Size portion. */
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if (size_cells > 2)
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return (ERANGE);
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*count = fdt_data_get((void *)data, size_cells);
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return (0);
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}
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int
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fdt_regsize(phandle_t node, u_long *base, u_long *size)
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{
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pcell_t reg[4];
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int addr_cells, len, size_cells;
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if (fdt_addrsize_cells(OF_parent(node), &addr_cells, &size_cells))
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return (ENXIO);
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if ((sizeof(pcell_t) * (addr_cells + size_cells)) > sizeof(reg))
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return (ENOMEM);
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|
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len = OF_getprop(node, "reg", ®, sizeof(reg));
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if (len <= 0)
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return (EINVAL);
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|
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*base = fdt_data_get(®[0], addr_cells);
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*size = fdt_data_get(®[addr_cells], size_cells);
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return (0);
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}
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|
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int
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fdt_reg_to_rl(phandle_t node, struct resource_list *rl)
|
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{
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u_long end, count, start;
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pcell_t *reg, *regptr;
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pcell_t addr_cells, size_cells;
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int tuple_size, tuples;
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int i, rv;
|
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long busaddr, bussize;
|
|
|
|
if (fdt_addrsize_cells(OF_parent(node), &addr_cells, &size_cells) != 0)
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return (ENXIO);
|
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if (fdt_get_range(OF_parent(node), 0, &busaddr, &bussize)) {
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busaddr = 0;
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bussize = 0;
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}
|
|
|
|
tuple_size = sizeof(pcell_t) * (addr_cells + size_cells);
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tuples = OF_getprop_alloc(node, "reg", tuple_size, (void **)®);
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debugf("addr_cells = %d, size_cells = %d\n", addr_cells, size_cells);
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debugf("tuples = %d, tuple size = %d\n", tuples, tuple_size);
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if (tuples <= 0)
|
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/* No 'reg' property in this node. */
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return (0);
|
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|
|
regptr = reg;
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for (i = 0; i < tuples; i++) {
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|
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rv = fdt_data_to_res(reg, addr_cells, size_cells, &start,
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&count);
|
|
if (rv != 0) {
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resource_list_free(rl);
|
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goto out;
|
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}
|
|
reg += addr_cells + size_cells;
|
|
|
|
/* Calculate address range relative to base. */
|
|
start += busaddr;
|
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end = start + count - 1;
|
|
|
|
debugf("reg addr start = %lx, end = %lx, count = %lx\n", start,
|
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end, count);
|
|
|
|
resource_list_add(rl, SYS_RES_MEMORY, i, start, end,
|
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count);
|
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}
|
|
rv = 0;
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|
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out:
|
|
OF_prop_free(regptr);
|
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return (rv);
|
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}
|
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|
|
int
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fdt_get_phyaddr(phandle_t node, device_t dev, int *phy_addr, void **phy_sc)
|
|
{
|
|
phandle_t phy_node;
|
|
pcell_t phy_handle, phy_reg;
|
|
uint32_t i;
|
|
device_t parent, child;
|
|
|
|
if (OF_getencprop(node, "phy-handle", (void *)&phy_handle,
|
|
sizeof(phy_handle)) <= 0)
|
|
return (ENXIO);
|
|
|
|
phy_node = OF_node_from_xref(phy_handle);
|
|
|
|
if (OF_getencprop(phy_node, "reg", (void *)&phy_reg,
|
|
sizeof(phy_reg)) <= 0)
|
|
return (ENXIO);
|
|
|
|
*phy_addr = phy_reg;
|
|
|
|
/*
|
|
* Search for softc used to communicate with phy.
|
|
*/
|
|
|
|
/*
|
|
* Step 1: Search for ancestor of the phy-node with a "phy-handle"
|
|
* property set.
|
|
*/
|
|
phy_node = OF_parent(phy_node);
|
|
while (phy_node != 0) {
|
|
if (OF_getprop(phy_node, "phy-handle", (void *)&phy_handle,
|
|
sizeof(phy_handle)) > 0)
|
|
break;
|
|
phy_node = OF_parent(phy_node);
|
|
}
|
|
if (phy_node == 0)
|
|
return (ENXIO);
|
|
|
|
/*
|
|
* Step 2: For each device with the same parent and name as ours
|
|
* compare its node with the one found in step 1, ancestor of phy
|
|
* node (stored in phy_node).
|
|
*/
|
|
parent = device_get_parent(dev);
|
|
i = 0;
|
|
child = device_find_child(parent, device_get_name(dev), i);
|
|
while (child != NULL) {
|
|
if (ofw_bus_get_node(child) == phy_node)
|
|
break;
|
|
i++;
|
|
child = device_find_child(parent, device_get_name(dev), i);
|
|
}
|
|
if (child == NULL)
|
|
return (ENXIO);
|
|
|
|
/*
|
|
* Use softc of the device found.
|
|
*/
|
|
*phy_sc = (void *)device_get_softc(child);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
fdt_get_reserved_regions(struct mem_region *mr, int *mrcnt)
|
|
{
|
|
pcell_t reserve[FDT_REG_CELLS * FDT_MEM_REGIONS];
|
|
pcell_t *reservep;
|
|
phandle_t memory, root;
|
|
uint32_t memory_size;
|
|
int addr_cells, size_cells;
|
|
int i, max_size, res_len, rv, tuple_size, tuples;
|
|
|
|
max_size = sizeof(reserve);
|
|
root = OF_finddevice("/");
|
|
memory = OF_finddevice("/memory");
|
|
if (memory == -1) {
|
|
rv = ENXIO;
|
|
goto out;
|
|
}
|
|
|
|
if ((rv = fdt_addrsize_cells(OF_parent(memory), &addr_cells,
|
|
&size_cells)) != 0)
|
|
goto out;
|
|
|
|
if (addr_cells > 2) {
|
|
rv = ERANGE;
|
|
goto out;
|
|
}
|
|
|
|
tuple_size = sizeof(pcell_t) * (addr_cells + size_cells);
|
|
|
|
res_len = OF_getproplen(root, "memreserve");
|
|
if (res_len <= 0 || res_len > sizeof(reserve)) {
|
|
rv = ERANGE;
|
|
goto out;
|
|
}
|
|
|
|
if (OF_getprop(root, "memreserve", reserve, res_len) <= 0) {
|
|
rv = ENXIO;
|
|
goto out;
|
|
}
|
|
|
|
memory_size = 0;
|
|
tuples = res_len / tuple_size;
|
|
reservep = (pcell_t *)&reserve;
|
|
for (i = 0; i < tuples; i++) {
|
|
|
|
rv = fdt_data_to_res(reservep, addr_cells, size_cells,
|
|
(u_long *)&mr[i].mr_start, (u_long *)&mr[i].mr_size);
|
|
|
|
if (rv != 0)
|
|
goto out;
|
|
|
|
reservep += addr_cells + size_cells;
|
|
}
|
|
|
|
*mrcnt = i;
|
|
rv = 0;
|
|
out:
|
|
return (rv);
|
|
}
|
|
|
|
int
|
|
fdt_get_mem_regions(struct mem_region *mr, int *mrcnt, uint64_t *memsize)
|
|
{
|
|
pcell_t reg[FDT_REG_CELLS * FDT_MEM_REGIONS];
|
|
pcell_t *regp;
|
|
phandle_t memory;
|
|
uint64_t memory_size;
|
|
int addr_cells, size_cells;
|
|
int i, max_size, reg_len, rv, tuple_size, tuples;
|
|
|
|
max_size = sizeof(reg);
|
|
memory = OF_finddevice("/memory");
|
|
if (memory == -1) {
|
|
rv = ENXIO;
|
|
goto out;
|
|
}
|
|
|
|
if ((rv = fdt_addrsize_cells(OF_parent(memory), &addr_cells,
|
|
&size_cells)) != 0)
|
|
goto out;
|
|
|
|
if (addr_cells > 2) {
|
|
rv = ERANGE;
|
|
goto out;
|
|
}
|
|
|
|
tuple_size = sizeof(pcell_t) * (addr_cells + size_cells);
|
|
reg_len = OF_getproplen(memory, "reg");
|
|
if (reg_len <= 0 || reg_len > sizeof(reg)) {
|
|
rv = ERANGE;
|
|
goto out;
|
|
}
|
|
|
|
if (OF_getprop(memory, "reg", reg, reg_len) <= 0) {
|
|
rv = ENXIO;
|
|
goto out;
|
|
}
|
|
|
|
memory_size = 0;
|
|
tuples = reg_len / tuple_size;
|
|
regp = (pcell_t *)®
|
|
for (i = 0; i < tuples; i++) {
|
|
|
|
rv = fdt_data_to_res(regp, addr_cells, size_cells,
|
|
(u_long *)&mr[i].mr_start, (u_long *)&mr[i].mr_size);
|
|
|
|
if (rv != 0)
|
|
goto out;
|
|
|
|
regp += addr_cells + size_cells;
|
|
memory_size += mr[i].mr_size;
|
|
}
|
|
|
|
if (memory_size == 0) {
|
|
rv = ERANGE;
|
|
goto out;
|
|
}
|
|
|
|
*mrcnt = i;
|
|
if (memsize != NULL)
|
|
*memsize = memory_size;
|
|
rv = 0;
|
|
out:
|
|
return (rv);
|
|
}
|
|
|
|
int
|
|
fdt_get_unit(device_t dev)
|
|
{
|
|
const char * name;
|
|
|
|
name = ofw_bus_get_name(dev);
|
|
name = strchr(name, '@') + 1;
|
|
|
|
return (strtol(name,NULL,0));
|
|
}
|
|
|
|
int
|
|
fdt_get_chosen_bootargs(char *bootargs, size_t max_size)
|
|
{
|
|
phandle_t chosen;
|
|
|
|
chosen = OF_finddevice("/chosen");
|
|
if (chosen == -1)
|
|
return (ENXIO);
|
|
if (OF_getprop(chosen, "bootargs", bootargs, max_size) == -1)
|
|
return (ENXIO);
|
|
return (0);
|
|
}
|