104 lines
2.4 KiB
C
104 lines
2.4 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2011 Google, Inc.
|
||
|
|
*
|
||
|
|
* Author:
|
||
|
|
* Colin Cross <ccross@android.com>
|
||
|
|
*
|
||
|
|
* Copyright (C) 2010,2013, NVIDIA Corporation
|
||
|
|
*
|
||
|
|
* This software is licensed under the terms of the GNU General Public
|
||
|
|
* License version 2, as published by the Free Software Foundation, and
|
||
|
|
* may be copied, distributed, and modified under those terms.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/cpu_pm.h>
|
||
|
|
#include <linux/interrupt.h>
|
||
|
|
#include <linux/io.h>
|
||
|
|
#include <linux/irqchip/arm-gic.h>
|
||
|
|
#include <linux/irq.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/of_address.h>
|
||
|
|
#include <linux/of.h>
|
||
|
|
#include <linux/syscore_ops.h>
|
||
|
|
|
||
|
|
#include "board.h"
|
||
|
|
#include "iomap.h"
|
||
|
|
#include "irq.h"
|
||
|
|
|
||
|
|
#define SGI_MASK 0xFFFF
|
||
|
|
|
||
|
|
#ifdef CONFIG_PM_SLEEP
|
||
|
|
static void __iomem *tegra_gic_cpu_base;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
bool tegra_pending_sgi(void)
|
||
|
|
{
|
||
|
|
u32 pending_set;
|
||
|
|
void __iomem *distbase = IO_ADDRESS(TEGRA_ARM_INT_DIST_BASE);
|
||
|
|
|
||
|
|
pending_set = readl_relaxed(distbase + GIC_DIST_PENDING_SET);
|
||
|
|
|
||
|
|
if (pending_set & SGI_MASK)
|
||
|
|
return true;
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef CONFIG_PM_SLEEP
|
||
|
|
static int tegra_gic_notifier(struct notifier_block *self,
|
||
|
|
unsigned long cmd, void *v)
|
||
|
|
{
|
||
|
|
switch (cmd) {
|
||
|
|
case CPU_PM_ENTER:
|
||
|
|
writel_relaxed(0x1E0, tegra_gic_cpu_base + GIC_CPU_CTRL);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return NOTIFY_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct notifier_block tegra_gic_notifier_block = {
|
||
|
|
.notifier_call = tegra_gic_notifier,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct of_device_id tegra114_dt_gic_match[] __initconst = {
|
||
|
|
{ .compatible = "arm,cortex-a15-gic" },
|
||
|
|
{ }
|
||
|
|
};
|
||
|
|
|
||
|
|
static void tegra114_gic_cpu_pm_registration(void)
|
||
|
|
{
|
||
|
|
struct device_node *dn;
|
||
|
|
|
||
|
|
dn = of_find_matching_node(NULL, tegra114_dt_gic_match);
|
||
|
|
if (!dn)
|
||
|
|
return;
|
||
|
|
|
||
|
|
tegra_gic_cpu_base = of_iomap(dn, 1);
|
||
|
|
|
||
|
|
cpu_pm_register_notifier(&tegra_gic_notifier_block);
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
static void tegra114_gic_cpu_pm_registration(void) { }
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static const struct of_device_id tegra_ictlr_match[] __initconst = {
|
||
|
|
{ .compatible = "nvidia,tegra20-ictlr" },
|
||
|
|
{ .compatible = "nvidia,tegra30-ictlr" },
|
||
|
|
{ }
|
||
|
|
};
|
||
|
|
|
||
|
|
void __init tegra_init_irq(void)
|
||
|
|
{
|
||
|
|
if (WARN_ON(!of_find_matching_node(NULL, tegra_ictlr_match)))
|
||
|
|
pr_warn("Outdated DT detected, suspend/resume will NOT work\n");
|
||
|
|
|
||
|
|
tegra114_gic_cpu_pm_registration();
|
||
|
|
}
|