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/* $OpenBSD: ofw_misc.c,v 1.1 2017/03/09 20:01:10 kettenis Exp $ */
/*
* Copyright (c) 2017 Mark Kettenis
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_pinctrl.h>
struct regmap {
uint32_t rm_phandle;
bus_space_tag_t rm_tag;
bus_space_handle_t rm_handle;
bus_size_t rm_size;
LIST_ENTRY(regmap) rm_list;
};
LIST_HEAD(, regmap) regmaps = LIST_HEAD_INITIALIZER(regmap);
void
regmap_register(int node, bus_space_tag_t tag, bus_space_handle_t handle,
bus_size_t size)
{
struct regmap *rm;
uint32_t phandle;
phandle = OF_getpropint(node, "phandle", 0);
if (phandle) {
rm = malloc(sizeof(struct regmap), M_DEVBUF, M_WAITOK);
rm->rm_phandle = phandle;
rm->rm_tag = tag;
rm->rm_handle = handle;
rm->rm_size = size;
LIST_INSERT_HEAD(®maps, rm, rm_list);
}
}
struct regmap *
regmap_byphandle(uint32_t phandle)
{
struct regmap *rm;
LIST_FOREACH(rm, ®maps, rm_list) {
if (rm->rm_phandle == phandle)
return rm;
}
return NULL;
}
void
regmap_write_4(struct regmap *rm, bus_size_t offset, uint32_t value)
{
KASSERT(offset <= rm->rm_size - sizeof(uint32_t));
bus_space_write_4(rm->rm_tag, rm->rm_handle, offset, value);
}
uint32_t
regmap_read_4(struct regmap *rm, bus_size_t offset)
{
KASSERT(offset <= rm->rm_size - sizeof(uint32_t));
return bus_space_read_4(rm->rm_tag, rm->rm_handle, offset);
}
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