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/* $OpenBSD: ofw_power.c,v 1.1 2018/05/02 15:16:31 patrick Exp $ */
/*
* Copyright (c) 2016 Mark Kettenis
* Copyright (c) 2018 Patrick Wildt <patrick@blueri.se>
*
* 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 <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_power.h>
LIST_HEAD(, power_domain_device) power_domain_devices =
LIST_HEAD_INITIALIZER(power_domain_devices);
void
power_domain_register(struct power_domain_device *pd)
{
pd->pd_cells = OF_getpropint(pd->pd_node, "#power-domain-cells", 0);
pd->pd_phandle = OF_getpropint(pd->pd_node, "phandle", 0);
if (pd->pd_phandle == 0)
return;
LIST_INSERT_HEAD(&power_domain_devices, pd, pd_list);
}
void
power_domain_enable_cells(uint32_t *cells, int on)
{
struct power_domain_device *pd;
uint32_t phandle = cells[0];
LIST_FOREACH(pd, &power_domain_devices, pd_list) {
if (pd->pd_phandle == phandle)
break;
}
if (pd && pd->pd_enable)
pd->pd_enable(pd->pd_cookie, &cells[1], on);
}
uint32_t *
power_domain_next_domain(uint32_t *cells)
{
uint32_t phandle = cells[0];
int node, ncells;
node = OF_getnodebyphandle(phandle);
if (node == 0)
return NULL;
ncells = OF_getpropint(node, "#power-domain-cells", 0);
return cells + ncells + 1;
}
void
power_domain_do_enable_idx(int node, int idx, int on)
{
uint32_t *domains;
uint32_t *domain;
int len;
len = OF_getproplen(node, "power-domains");
if (len <= 0)
return;
domains = malloc(len, M_TEMP, M_WAITOK);
OF_getpropintarray(node, "power-domains", domains, len);
domain = domains;
while (domain && domain < domains + (len / sizeof(uint32_t))) {
if (idx <= 0)
power_domain_enable_cells(domain, on);
if (idx == 0)
break;
domain = power_domain_next_domain(domain);
idx--;
}
free(domains, M_TEMP, len);
}
void
power_domain_enable(int node)
{
power_domain_do_enable_idx(node, 0, 1);
}
void
power_domain_disable(int node)
{
power_domain_do_enable_idx(node, 0, 0);
}
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