152 lines
4.3 KiB
C
152 lines
4.3 KiB
C
/*-
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* Copyright (c) 2014 Ian Lepore <ian@freebsd.org>
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* All rights reserved.
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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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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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#include <sys/param.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 "fdt_pinctrl_if.h"
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#include <dev/fdt/fdt_common.h>
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#include <dev/fdt/fdt_pinctrl.h>
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int
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fdt_pinctrl_configure(device_t client, u_int index)
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{
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device_t pinctrl;
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phandle_t *configs;
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int i, nconfigs;
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char name[16];
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snprintf(name, sizeof(name), "pinctrl-%u", index);
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nconfigs = OF_getprop_alloc(ofw_bus_get_node(client), name,
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sizeof(*configs), (void **)&configs);
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if (nconfigs < 0)
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return (ENOENT);
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if (nconfigs == 0)
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return (0); /* Empty property is documented as valid. */
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for (i = 0; i < nconfigs; i++) {
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if ((pinctrl = OF_device_from_xref(configs[i])) != NULL)
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FDT_PINCTRL_CONFIGURE(pinctrl, configs[i]);
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}
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free(configs, M_OFWPROP);
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return (0);
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}
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int
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fdt_pinctrl_configure_by_name(device_t client, const char * name)
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{
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char * names;
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int i, offset, nameslen;
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nameslen = OF_getprop_alloc(ofw_bus_get_node(client), "pinctrl-names",
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sizeof(*names), (void **)&names);
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if (nameslen <= 0)
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return (ENOENT);
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for (i = 0, offset = 0; offset < nameslen; i++) {
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if (strcmp(name, &names[offset]) == 0)
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break;
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offset += strlen(&names[offset]) + 1;
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}
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free(names, M_OFWPROP);
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if (offset < nameslen)
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return (fdt_pinctrl_configure(client, i));
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else
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return (ENOENT);
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}
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static int
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pinctrl_register_children(device_t pinctrl, phandle_t parent,
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const char *pinprop)
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{
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phandle_t node;
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/*
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* Recursively descend from parent, looking for nodes that have the
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* given property, and associate the pinctrl device_t with each one.
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*/
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for (node = OF_child(parent); node != 0; node = OF_peer(node)) {
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pinctrl_register_children(pinctrl, node, pinprop);
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if (pinprop == NULL || OF_hasprop(node, pinprop)) {
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OF_device_register_xref(OF_xref_from_node(node),
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pinctrl);
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}
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}
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return (0);
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}
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int
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fdt_pinctrl_register(device_t pinctrl, const char *pinprop)
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{
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phandle_t node;
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node = ofw_bus_get_node(pinctrl);
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OF_device_register_xref(OF_xref_from_node(node), pinctrl);
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return (pinctrl_register_children(pinctrl, node, pinprop));
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}
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static int
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pinctrl_configure_children(device_t pinctrl, phandle_t parent)
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{
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phandle_t node, *configs;
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int i, nconfigs;
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for (node = OF_child(parent); node != 0; node = OF_peer(node)) {
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if (!fdt_is_enabled(node))
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continue;
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pinctrl_configure_children(pinctrl, node);
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nconfigs = OF_getencprop_alloc(node, "pinctrl-0",
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sizeof(*configs), (void **)&configs);
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#ifdef DEBUG
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{
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char name[32];
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OF_getprop(node, "name", &name, sizeof(name));
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printf("%d items in pinctrl-0 for %s\n", nconfigs, name);
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}
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#endif
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if (nconfigs <= 0)
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continue;
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for (i = 0; i < nconfigs; i++) {
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if (OF_device_from_xref(configs[i]) == pinctrl)
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FDT_PINCTRL_CONFIGURE(pinctrl, configs[i]);
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}
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free(configs, M_OFWPROP);
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}
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return (0);
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}
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int
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fdt_pinctrl_configure_tree(device_t pinctrl)
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{
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return (pinctrl_configure_children(pinctrl, OF_peer(0)));
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}
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