63e8633e80
Submitted by: Aleksey Kuleshov <rndfax@yandex.ru> Differential Revision: https://reviews.freebsd.org/D3041
596 lines
15 KiB
C
596 lines
15 KiB
C
/*-
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* Copyright (c) 2001 - 2003 by Thomas Moestl <tmm@FreeBSD.org>.
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* Copyright (c) 2005 Marius Strobl <marius@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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* without modification, immediately at the beginning of the file.
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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
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* the documentation and/or other materials provided with the
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* 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 FOR
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* 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 "opt_platform.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/errno.h>
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#include <sys/libkern.h>
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#include <machine/resource.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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int
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ofw_bus_gen_setup_devinfo(struct ofw_bus_devinfo *obd, phandle_t node)
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{
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if (obd == NULL)
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return (ENOMEM);
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/* The 'name' property is considered mandatory. */
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if ((OF_getprop_alloc(node, "name", 1, (void **)&obd->obd_name)) == -1)
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return (EINVAL);
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OF_getprop_alloc(node, "compatible", 1, (void **)&obd->obd_compat);
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OF_getprop_alloc(node, "device_type", 1, (void **)&obd->obd_type);
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OF_getprop_alloc(node, "model", 1, (void **)&obd->obd_model);
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OF_getprop_alloc(node, "status", 1, (void **)&obd->obd_status);
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obd->obd_node = node;
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return (0);
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}
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void
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ofw_bus_gen_destroy_devinfo(struct ofw_bus_devinfo *obd)
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{
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if (obd == NULL)
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return;
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if (obd->obd_compat != NULL)
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free(obd->obd_compat, M_OFWPROP);
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if (obd->obd_model != NULL)
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free(obd->obd_model, M_OFWPROP);
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if (obd->obd_name != NULL)
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free(obd->obd_name, M_OFWPROP);
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if (obd->obd_type != NULL)
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free(obd->obd_type, M_OFWPROP);
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if (obd->obd_status != NULL)
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free(obd->obd_status, M_OFWPROP);
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}
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int
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ofw_bus_gen_child_pnpinfo_str(device_t cbdev, device_t child, char *buf,
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size_t buflen)
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{
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if (ofw_bus_get_name(child) != NULL) {
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strlcat(buf, "name=", buflen);
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strlcat(buf, ofw_bus_get_name(child), buflen);
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}
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if (ofw_bus_get_compat(child) != NULL) {
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strlcat(buf, " compat=", buflen);
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strlcat(buf, ofw_bus_get_compat(child), buflen);
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}
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return (0);
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};
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const char *
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ofw_bus_gen_get_compat(device_t bus, device_t dev)
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{
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const struct ofw_bus_devinfo *obd;
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obd = OFW_BUS_GET_DEVINFO(bus, dev);
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if (obd == NULL)
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return (NULL);
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return (obd->obd_compat);
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}
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const char *
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ofw_bus_gen_get_model(device_t bus, device_t dev)
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{
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const struct ofw_bus_devinfo *obd;
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obd = OFW_BUS_GET_DEVINFO(bus, dev);
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if (obd == NULL)
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return (NULL);
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return (obd->obd_model);
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}
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const char *
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ofw_bus_gen_get_name(device_t bus, device_t dev)
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{
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const struct ofw_bus_devinfo *obd;
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obd = OFW_BUS_GET_DEVINFO(bus, dev);
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if (obd == NULL)
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return (NULL);
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return (obd->obd_name);
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}
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phandle_t
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ofw_bus_gen_get_node(device_t bus, device_t dev)
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{
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const struct ofw_bus_devinfo *obd;
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obd = OFW_BUS_GET_DEVINFO(bus, dev);
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if (obd == NULL)
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return (0);
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return (obd->obd_node);
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}
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const char *
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ofw_bus_gen_get_type(device_t bus, device_t dev)
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{
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const struct ofw_bus_devinfo *obd;
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obd = OFW_BUS_GET_DEVINFO(bus, dev);
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if (obd == NULL)
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return (NULL);
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return (obd->obd_type);
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}
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const char *
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ofw_bus_get_status(device_t dev)
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{
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const struct ofw_bus_devinfo *obd;
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obd = OFW_BUS_GET_DEVINFO(device_get_parent(dev), dev);
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if (obd == NULL)
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return (NULL);
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return (obd->obd_status);
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}
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int
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ofw_bus_status_okay(device_t dev)
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{
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const char *status;
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status = ofw_bus_get_status(dev);
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if (status == NULL || strcmp(status, "okay") == 0 ||
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strcmp(status, "ok") == 0)
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return (1);
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return (0);
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}
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static int
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ofw_bus_node_is_compatible(const char *compat, int len, const char *onecompat)
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{
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int onelen, l, ret;
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onelen = strlen(onecompat);
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ret = 0;
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while (len > 0) {
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if (strlen(compat) == onelen &&
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strncasecmp(compat, onecompat, onelen) == 0) {
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/* Found it. */
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ret = 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 (ret);
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}
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int
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ofw_bus_is_compatible(device_t dev, const char *onecompat)
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{
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phandle_t node;
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const char *compat;
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int len;
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if ((compat = ofw_bus_get_compat(dev)) == NULL)
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return (0);
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if ((node = ofw_bus_get_node(dev)) == -1)
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return (0);
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/* Get total 'compatible' prop len */
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if ((len = OF_getproplen(node, "compatible")) <= 0)
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return (0);
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return (ofw_bus_node_is_compatible(compat, len, onecompat));
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}
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int
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ofw_bus_is_compatible_strict(device_t dev, const char *compatible)
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{
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const char *compat;
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size_t len;
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if ((compat = ofw_bus_get_compat(dev)) == NULL)
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return (0);
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len = strlen(compatible);
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if (strlen(compat) == len &&
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strncasecmp(compat, compatible, len) == 0)
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return (1);
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return (0);
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}
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const struct ofw_compat_data *
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ofw_bus_search_compatible(device_t dev, const struct ofw_compat_data *compat)
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{
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if (compat == NULL)
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return NULL;
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for (; compat->ocd_str != NULL; ++compat) {
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if (ofw_bus_is_compatible(dev, compat->ocd_str))
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break;
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}
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return (compat);
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}
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int
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ofw_bus_has_prop(device_t dev, const char *propname)
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{
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phandle_t node;
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if ((node = ofw_bus_get_node(dev)) == -1)
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return (0);
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return (OF_hasprop(node, propname));
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}
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void
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ofw_bus_setup_iinfo(phandle_t node, struct ofw_bus_iinfo *ii, int intrsz)
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{
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pcell_t addrc;
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int msksz;
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if (OF_getencprop(node, "#address-cells", &addrc, sizeof(addrc)) == -1)
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addrc = 2;
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ii->opi_addrc = addrc * sizeof(pcell_t);
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ii->opi_imapsz = OF_getencprop_alloc(node, "interrupt-map", 1,
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(void **)&ii->opi_imap);
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if (ii->opi_imapsz > 0) {
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msksz = OF_getencprop_alloc(node, "interrupt-map-mask", 1,
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(void **)&ii->opi_imapmsk);
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/*
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* Failure to get the mask is ignored; a full mask is used
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* then. We barf on bad mask sizes, however.
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*/
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if (msksz != -1 && msksz != ii->opi_addrc + intrsz)
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panic("ofw_bus_setup_iinfo: bad interrupt-map-mask "
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"property!");
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}
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}
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int
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ofw_bus_lookup_imap(phandle_t node, struct ofw_bus_iinfo *ii, void *reg,
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int regsz, void *pintr, int pintrsz, void *mintr, int mintrsz,
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phandle_t *iparent)
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{
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uint8_t maskbuf[regsz + pintrsz];
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int rv;
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if (ii->opi_imapsz <= 0)
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return (0);
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KASSERT(regsz >= ii->opi_addrc,
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("ofw_bus_lookup_imap: register size too small: %d < %d",
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regsz, ii->opi_addrc));
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if (node != -1) {
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rv = OF_getencprop(node, "reg", reg, regsz);
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if (rv < regsz)
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panic("ofw_bus_lookup_imap: cannot get reg property");
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}
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return (ofw_bus_search_intrmap(pintr, pintrsz, reg, ii->opi_addrc,
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ii->opi_imap, ii->opi_imapsz, ii->opi_imapmsk, maskbuf, mintr,
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mintrsz, iparent));
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}
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/*
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* Map an interrupt using the firmware reg, interrupt-map and
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* interrupt-map-mask properties.
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* The interrupt property to be mapped must be of size intrsz, and pointed to
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* by intr. The regs property of the node for which the mapping is done must
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* be passed as regs. This property is an array of register specifications;
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* the size of the address part of such a specification must be passed as
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* physsz. Only the first element of the property is used.
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* imap and imapsz hold the interrupt mask and it's size.
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* imapmsk is a pointer to the interrupt-map-mask property, which must have
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* a size of physsz + intrsz; it may be NULL, in which case a full mask is
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* assumed.
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* maskbuf must point to a buffer of length physsz + intrsz.
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* The interrupt is returned in result, which must point to a buffer of length
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* rintrsz (which gives the expected size of the mapped interrupt).
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* Returns number of cells in the interrupt if a mapping was found, 0 otherwise.
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*/
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int
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ofw_bus_search_intrmap(void *intr, int intrsz, void *regs, int physsz,
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void *imap, int imapsz, void *imapmsk, void *maskbuf, void *result,
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int rintrsz, phandle_t *iparent)
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{
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phandle_t parent;
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uint8_t *ref = maskbuf;
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uint8_t *uiintr = intr;
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uint8_t *uiregs = regs;
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uint8_t *uiimapmsk = imapmsk;
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uint8_t *mptr;
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pcell_t pintrsz;
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int i, rsz, tsz;
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rsz = -1;
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if (imapmsk != NULL) {
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for (i = 0; i < physsz; i++)
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ref[i] = uiregs[i] & uiimapmsk[i];
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for (i = 0; i < intrsz; i++)
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ref[physsz + i] = uiintr[i] & uiimapmsk[physsz + i];
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} else {
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bcopy(regs, ref, physsz);
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bcopy(intr, ref + physsz, intrsz);
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}
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mptr = imap;
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i = imapsz;
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while (i > 0) {
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bcopy(mptr + physsz + intrsz, &parent, sizeof(parent));
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if (OF_searchencprop(OF_node_from_xref(parent),
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"#interrupt-cells", &pintrsz, sizeof(pintrsz)) == -1)
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pintrsz = 1; /* default */
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pintrsz *= sizeof(pcell_t);
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/* Compute the map stride size. */
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tsz = physsz + intrsz + sizeof(phandle_t) + pintrsz;
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KASSERT(i >= tsz, ("ofw_bus_search_intrmap: truncated map"));
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if (bcmp(ref, mptr, physsz + intrsz) == 0) {
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bcopy(mptr + physsz + intrsz + sizeof(parent),
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result, MIN(rintrsz, pintrsz));
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if (iparent != NULL)
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*iparent = parent;
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return (pintrsz/sizeof(pcell_t));
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}
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mptr += tsz;
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i -= tsz;
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}
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return (0);
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}
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int
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ofw_bus_reg_to_rl(device_t dev, phandle_t node, pcell_t acells, pcell_t scells,
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struct resource_list *rl)
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{
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uint64_t phys, size;
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ssize_t i, j, rid, nreg, ret;
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uint32_t *reg;
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char *name;
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/*
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* This may be just redundant when having ofw_bus_devinfo
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* but makes this routine independent of it.
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*/
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ret = OF_getencprop_alloc(node, "name", sizeof(*name), (void **)&name);
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if (ret == -1)
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name = NULL;
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ret = OF_getencprop_alloc(node, "reg", sizeof(*reg), (void **)®);
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nreg = (ret == -1) ? 0 : ret;
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if (nreg % (acells + scells) != 0) {
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if (bootverbose)
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device_printf(dev, "Malformed reg property on <%s>\n",
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(name == NULL) ? "unknown" : name);
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nreg = 0;
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}
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for (i = 0, rid = 0; i < nreg; i += acells + scells, rid++) {
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phys = size = 0;
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for (j = 0; j < acells; j++) {
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phys <<= 32;
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phys |= reg[i + j];
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}
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for (j = 0; j < scells; j++) {
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size <<= 32;
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size |= reg[i + acells + j];
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}
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/* Skip the dummy reg property of glue devices like ssm(4). */
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if (size != 0)
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resource_list_add(rl, SYS_RES_MEMORY, rid,
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phys, phys + size - 1, size);
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}
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free(name, M_OFWPROP);
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free(reg, M_OFWPROP);
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return (0);
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}
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int
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ofw_bus_intr_to_rl(device_t dev, phandle_t node,
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struct resource_list *rl, int *rlen)
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{
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phandle_t iparent;
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uint32_t icells, *intr;
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int err, i, irqnum, nintr, rid;
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boolean_t extended;
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nintr = OF_getencprop_alloc(node, "interrupts", sizeof(*intr),
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(void **)&intr);
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if (nintr > 0) {
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if (OF_searchencprop(node, "interrupt-parent", &iparent,
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sizeof(iparent)) == -1) {
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for (iparent = node; iparent != 0;
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iparent = OF_parent(iparent)) {
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if (OF_hasprop(iparent, "interrupt-controller"))
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break;
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}
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if (iparent == 0) {
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device_printf(dev, "No interrupt-parent found, "
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"assuming direct parent\n");
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iparent = OF_parent(node);
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}
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iparent = OF_xref_from_node(iparent);
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}
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if (OF_searchencprop(OF_node_from_xref(iparent),
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"#interrupt-cells", &icells, sizeof(icells)) == -1) {
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device_printf(dev, "Missing #interrupt-cells "
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"property, assuming <1>\n");
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icells = 1;
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}
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if (icells < 1 || icells > nintr) {
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device_printf(dev, "Invalid #interrupt-cells property "
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"value <%d>, assuming <1>\n", icells);
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icells = 1;
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}
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extended = false;
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} else {
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nintr = OF_getencprop_alloc(node, "interrupts-extended",
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sizeof(*intr), (void **)&intr);
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if (nintr <= 0)
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return (0);
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extended = true;
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}
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err = 0;
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rid = 0;
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for (i = 0; i < nintr; i += icells) {
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if (extended) {
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iparent = intr[i++];
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if (OF_searchencprop(OF_node_from_xref(iparent),
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"#interrupt-cells", &icells, sizeof(icells)) == -1) {
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device_printf(dev, "Missing #interrupt-cells "
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"property\n");
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err = ENOENT;
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break;
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}
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if (icells < 1 || (i + icells) > nintr) {
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device_printf(dev, "Invalid #interrupt-cells "
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"property value <%d>\n", icells);
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err = ERANGE;
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break;
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|
}
|
|
}
|
|
irqnum = ofw_bus_map_intr(dev, iparent, icells, &intr[i]);
|
|
resource_list_add(rl, SYS_RES_IRQ, rid++, irqnum, irqnum, 1);
|
|
}
|
|
if (rlen != NULL)
|
|
*rlen = rid;
|
|
free(intr, M_OFWPROP);
|
|
return (err);
|
|
}
|
|
|
|
phandle_t
|
|
ofw_bus_find_child(phandle_t start, const char *child_name)
|
|
{
|
|
char *name;
|
|
int ret;
|
|
phandle_t child;
|
|
|
|
for (child = OF_child(start); child != 0; child = OF_peer(child)) {
|
|
ret = OF_getencprop_alloc(child, "name", sizeof(*name), (void **)&name);
|
|
if (ret == -1)
|
|
continue;
|
|
if (strcmp(name, child_name) == 0) {
|
|
free(name, M_OFWPROP);
|
|
return (child);
|
|
}
|
|
|
|
free(name, M_OFWPROP);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
phandle_t
|
|
ofw_bus_find_compatible(phandle_t node, const char *onecompat)
|
|
{
|
|
phandle_t child, ret;
|
|
void *compat;
|
|
int len;
|
|
|
|
/*
|
|
* Traverse all children of 'start' node, and find first with
|
|
* matching 'compatible' property.
|
|
*/
|
|
for (child = OF_child(node); child != 0; child = OF_peer(child)) {
|
|
len = OF_getprop_alloc(child, "compatible", 1, &compat);
|
|
if (len >= 0) {
|
|
ret = ofw_bus_node_is_compatible(compat, len,
|
|
onecompat);
|
|
free(compat, M_OFWPROP);
|
|
if (ret != 0)
|
|
return (child);
|
|
}
|
|
|
|
ret = ofw_bus_find_compatible(child, onecompat);
|
|
if (ret != 0)
|
|
return (ret);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/**
|
|
* @brief Return child of bus whose phandle is node
|
|
*
|
|
* A direct child of @p will be returned if it its phandle in the
|
|
* OFW tree is @p node. Otherwise, NULL is returned.
|
|
*
|
|
* @param bus The bus to examine
|
|
* @param node The phandle_t to look for.
|
|
*/
|
|
device_t
|
|
ofw_bus_find_child_device_by_phandle(device_t bus, phandle_t node)
|
|
{
|
|
device_t *children, retval, child;
|
|
int nkid, i;
|
|
|
|
/*
|
|
* Nothing can match the flag value for no node.
|
|
*/
|
|
if (node == -1)
|
|
return (NULL);
|
|
|
|
/*
|
|
* Search the children for a match. We microoptimize
|
|
* a bit by not using ofw_bus_get since we already know
|
|
* the parent. We do not recurse.
|
|
*/
|
|
if (device_get_children(bus, &children, &nkid) != 0)
|
|
return (NULL);
|
|
retval = NULL;
|
|
for (i = 0; i < nkid; i++) {
|
|
child = children[i];
|
|
if (OFW_BUS_GET_NODE(bus, child) == node) {
|
|
retval = child;
|
|
break;
|
|
}
|
|
}
|
|
free(children, M_TEMP);
|
|
|
|
return (retval);
|
|
}
|