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/*
* Copyright (c) 2011, Google, Inc.
*
* Copyright (c) 2011-2013, 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 <mach/gpio-tegra.h>
#include <mach/iomap.h>
#include <mach/irqs.h>
#include "gpio-names.h"
#include "pm-irq.h"
/* TODO: We could populate the other table from this one at runtime
* instead of always searching twice */
static int tegra_gpio_wakes[] = {
[0] = TEGRA_GPIO_PO5,
[1] = TEGRA_GPIO_PV3,
[2] = TEGRA_GPIO_PL1,
[3] = TEGRA_GPIO_PB6,
[4] = TEGRA_GPIO_PN7,
[5] = TEGRA_GPIO_PA0,
[6] = TEGRA_GPIO_PU5,
[7] = TEGRA_GPIO_PU6,
[8] = TEGRA_GPIO_PC7,
[9] = TEGRA_GPIO_PS2,
[10] = TEGRA_GPIO_PAA1,
[11] = TEGRA_GPIO_PW3,
[12] = TEGRA_GPIO_PW2,
[13] = TEGRA_GPIO_PY6,
[14] = TEGRA_GPIO_PV6,
[15] = TEGRA_GPIO_PJ7,
[16] = -EINVAL,
[17] = -EINVAL,
[18] = -EINVAL,
[19] = -EINVAL, /* TEGRA_USB1_VBUS, */
[20] = -EINVAL, /* TEGRA_USB3_VBUS, */
[21] = -EINVAL, /* TEGRA_USB1_ID, */
[22] = -EINVAL, /* TEGRA_USB3_ID, */
[23] = TEGRA_GPIO_PI5,
[24] = TEGRA_GPIO_PV2,
[25] = TEGRA_GPIO_PS4,
[26] = TEGRA_GPIO_PS5,
[27] = TEGRA_GPIO_PS0,
[28] = TEGRA_GPIO_PQ6,
[29] = TEGRA_GPIO_PQ7,
[30] = TEGRA_GPIO_PN2,
};
static int tegra_wake_event_irq[] = {
[0] = -EAGAIN, /* Search the GPIO table */
[1] = -EAGAIN,
[2] = -EAGAIN,
[3] = -EAGAIN,
[4] = -EAGAIN,
[5] = -EAGAIN,
[6] = -EAGAIN,
[7] = -EAGAIN,
[8] = -EAGAIN,
[9] = -EAGAIN,
[10] = -EAGAIN,
[11] = -EAGAIN,
[12] = -EAGAIN,
[13] = -EAGAIN,
[14] = -EAGAIN,
[15] = -EAGAIN,
[16] = INT_RTC,
[17] = INT_KBC,
[18] = INT_EXTERNAL_PMU,
[19] = -EINVAL, /* TEGRA_USB1_VBUS, */
[20] = -EINVAL, /* TEGRA_USB3_VBUS, */
[21] = -EINVAL, /* TEGRA_USB1_ID, */
[22] = -EINVAL, /* TEGRA_USB3_ID, */
[23] = -EAGAIN,
[24] = -EAGAIN,
[25] = -EAGAIN,
[26] = -EAGAIN,
[27] = -EAGAIN,
[28] = -EAGAIN,
[29] = -EAGAIN,
[30] = -EAGAIN,
};
static int last_gpio = -1;
inline void tegra_get_internal_any_wake_list(u8 *wake_count,
u8 **any_wake, u8 *remote_usb_index)
{
*wake_count = 0;
}
inline int get_vbus_id_cable_connect_state(bool *is_vbus_connected,
bool *is_id_connected)
{
return -EIO;
}
int tegra_gpio_to_wake(int gpio)
{
int i;
for (i = 0; i < ARRAY_SIZE(tegra_gpio_wakes); i++) {
if (tegra_gpio_wakes[i] == gpio) {
pr_info("gpio wake%d for gpio=%d\n", i, gpio);
last_gpio = i;
return i;
}
}
return -EINVAL;
}
void tegra_irq_to_wake(int irq, int *wak_list, int *wak_size)
{
int i;
*wak_size = 0;
for (i = 0; i < ARRAY_SIZE(tegra_wake_event_irq); i++) {
if (tegra_wake_event_irq[i] == irq) {
pr_info("Wake %d for irq=%d\n", i, irq);
wak_list[*wak_size] = i;
*wak_size = *wak_size + 1;
}
}
if (*wak_size)
goto out;
/* The gpio set_wake code bubbles the set_wake call up to the irq
* set_wake code. This insures that the nested irq set_wake call
* succeeds, even though it doesn't have to do any pm setup for the
* bank.
*
* This is very fragile - there's no locking, so two callers could
* cause issues with this.
*/
if (last_gpio < 0)
goto out;
if (tegra_gpio_get_bank_int_nr(tegra_gpio_wakes[last_gpio]) == irq) {
pr_info("gpio bank wake found: wake %d for irq=%d\n", i, irq);
wak_list[*wak_size] = last_gpio;
*wak_size = 1;
}
out:
return;
}
int tegra_wake_to_irq(int wake)
{
int ret;
if (wake < 0)
return -EINVAL;
if (wake >= ARRAY_SIZE(tegra_wake_event_irq))
return -EINVAL;
ret = tegra_wake_event_irq[wake];
if (ret == -EAGAIN) {
ret = tegra_gpio_wakes[wake];
if (ret != -EINVAL)
ret = gpio_to_irq(ret);
}
return ret;
}
int tegra_disable_wake_source(int wake)
{
if (wake >= ARRAY_SIZE(tegra_wake_event_irq))
return -EINVAL;
tegra_wake_event_irq[wake] = -EINVAL;
return 0;
}
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