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/*
* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/kernel.h>
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <mach/iomap.h>
#include <mach/irqs.h>
#include <mach/gpio.h>
#include "gpio-names.h"
#include "wakeups.h"
extern int *tegra_wake_event_irq;
extern unsigned int tegra_wake_event_irq_size;
int tegra_irq_to_wake(int irq)
{
int i;
int wake_irq;
int search_gpio;
static int last_wake = -1;
/* Two level wake irq search for gpio based wakeups -
* 1. check for GPIO irq(based on tegra_wake_event_irq table)
* e.g. for a board, wake7 based on GPIO PU6 and irq==390 done first
* 2. check for gpio bank irq assuming search for GPIO irq
* preceded this search.
* e.g. in this step check for gpio bank irq GPIO6 irq==119
*/
for (i = 0; i < tegra_wake_event_irq_size; i++) {
/* return if step 1 matches */
if (tegra_wake_event_irq[i] == irq) {
pr_info("Wake%d for irq=%d\n", i, irq);
last_wake = i;
return i;
}
/* step 2 below uses saved last_wake from step 1
* in previous call */
search_gpio = irq_to_gpio(
tegra_wake_event_irq[i]);
if (search_gpio < 0)
continue;
wake_irq = tegra_gpio_get_bank_int_nr(search_gpio);
if (wake_irq < 0)
continue;
if ((last_wake == i) &&
(wake_irq == irq)) {
pr_info("gpio bank wake found: wake%d for irq=%d\n",
i, irq);
return i;
}
}
return -EINVAL;
}
int tegra_wake_to_irq(int wake)
{
if (wake < 0)
return -EINVAL;
if (wake >= tegra_wake_event_irq_size)
return -EINVAL;
return tegra_wake_event_irq[wake];
}
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