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/*-
* Copyright 2016 Michal Meloun <mmel@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include "opt_platform.h"
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/kobj.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#ifdef FDT
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#endif
#include <dev/extres/hwreset/hwreset.h>
#include "hwreset_if.h"
struct hwreset {
device_t consumer_dev; /* consumer device*/
device_t provider_dev; /* provider device*/
int rst_id; /* reset id */
};
MALLOC_DEFINE(M_HWRESET, "hwreset", "Reset framework");
int
hwreset_assert(hwreset_t rst)
{
return (HWRESET_ASSERT(rst->provider_dev, rst->rst_id, true));
}
int
hwreset_deassert(hwreset_t rst)
{
return (HWRESET_ASSERT(rst->provider_dev, rst->rst_id, false));
}
int
hwreset_is_asserted(hwreset_t rst, bool *value)
{
return (HWRESET_IS_ASSERTED(rst->provider_dev, rst->rst_id, value));
}
void
hwreset_release(hwreset_t rst)
{
free(rst, M_HWRESET);
}
int
hwreset_get_by_id(device_t consumer_dev, device_t provider_dev, intptr_t id,
hwreset_t *rst_out)
{
hwreset_t rst;
/* Create handle */
rst = malloc(sizeof(struct hwreset), M_HWRESET,
M_WAITOK | M_ZERO);
rst->consumer_dev = consumer_dev;
rst->provider_dev = provider_dev;
rst->rst_id = id;
*rst_out = rst;
return (0);
}
#ifdef FDT
int
hwreset_default_ofw_map(device_t provider_dev, phandle_t xref, int ncells,
pcell_t *cells, intptr_t *id)
{
if (ncells == 0)
*id = 1;
else if (ncells == 1)
*id = cells[0];
else
return (ERANGE);
return (0);
}
int
hwreset_get_by_ofw_idx(device_t consumer_dev, phandle_t cnode, int idx,
hwreset_t *rst)
{
phandle_t xnode;
pcell_t *cells;
device_t rstdev;
int ncells, rv;
intptr_t id;
if (cnode <= 0)
cnode = ofw_bus_get_node(consumer_dev);
if (cnode <= 0) {
device_printf(consumer_dev,
"%s called on not ofw based device\n", __func__);
return (ENXIO);
}
rv = ofw_bus_parse_xref_list_alloc(cnode, "resets", "#reset-cells",
idx, &xnode, &ncells, &cells);
if (rv != 0)
return (rv);
/* Tranlate provider to device */
rstdev = OF_device_from_xref(xnode);
if (rstdev == NULL) {
OF_prop_free(cells);
return (ENODEV);
}
/* Map reset to number */
rv = HWRESET_MAP(rstdev, xnode, ncells, cells, &id);
OF_prop_free(cells);
if (rv != 0)
return (rv);
return (hwreset_get_by_id(consumer_dev, rstdev, id, rst));
}
int
hwreset_get_by_ofw_name(device_t consumer_dev, phandle_t cnode, char *name,
hwreset_t *rst)
{
int rv, idx;
if (cnode <= 0)
cnode = ofw_bus_get_node(consumer_dev);
if (cnode <= 0) {
device_printf(consumer_dev,
"%s called on not ofw based device\n", __func__);
return (ENXIO);
}
rv = ofw_bus_find_string_index(cnode, "reset-names", name, &idx);
if (rv != 0)
return (rv);
return (hwreset_get_by_ofw_idx(consumer_dev, cnode, idx, rst));
}
void
hwreset_register_ofw_provider(device_t provider_dev)
{
phandle_t xref, node;
node = ofw_bus_get_node(provider_dev);
if (node <= 0)
panic("%s called on not ofw based device.\n", __func__);
xref = OF_xref_from_node(node);
OF_device_register_xref(xref, provider_dev);
}
void
hwreset_unregister_ofw_provider(device_t provider_dev)
{
phandle_t xref;
xref = OF_xref_from_device(provider_dev);
OF_device_register_xref(xref, NULL);
}
#endif
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