126 lines
2.8 KiB
C
126 lines
2.8 KiB
C
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/*
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* Tegra Wakeups for NVIDIA SoCs Tegra
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*
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* Copyright (c) 2013-2020, NVIDIA CORPORATION. All rights reserved.
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*
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* Author: Laxman Dewangan <ldewangan@nvidia.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/export.h>
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#include <linux/kernel.h>
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#include <linux/gpio.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/io.h>
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#include <linux/irqchip/tegra.h>
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#include <linux/system-wakeup.h>
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int *tegra_gpio_wake_table;
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EXPORT_SYMBOL_GPL(tegra_gpio_wake_table);
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int *tegra_irq_wake_table;
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EXPORT_SYMBOL_GPL(tegra_irq_wake_table);
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int tegra_wake_table_len;
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EXPORT_SYMBOL_GPL(tegra_wake_table_len);
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void tegra_pm_update_gpio_wakeup_table(int base, int *gpio_wakeup_list,
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int nlist)
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{
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int i;
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for (i = 0; i < nlist; ++i) {
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if (gpio_wakeup_list[i] == -ENOENT)
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continue;
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if (gpio_wakeup_list[i] < 0) {
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tegra_gpio_wake_table[i] = gpio_wakeup_list[i];
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} else {
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tegra_gpio_wake_table[i] = base + gpio_wakeup_list[i];
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tegra_irq_wake_table[i] = -EAGAIN;
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}
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}
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}
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void tegra_irq_to_wake(int irq, int *wak_list, int *wak_size)
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{
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int i;
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*wak_size = 0;
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for (i = 0; i < tegra_wake_table_len; i++) {
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if (tegra_irq_wake_table[i] == irq) {
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pr_info("Wake%d for irq=%d\n", i, irq);
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wak_list[*wak_size] = i;
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*wak_size = *wak_size + 1;
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}
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}
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}
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int tegra_wake_to_gpio(int wake)
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{
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if (wake < 0 || wake >= tegra_wake_table_len)
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return -EINVAL;
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return tegra_gpio_wake_table[wake];
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}
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int tegra_wake_to_irq(int wake)
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{
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int ret;
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if (wake < 0)
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return -EINVAL;
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if (wake >= tegra_wake_table_len)
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return -EINVAL;
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ret = tegra_irq_wake_table[wake];
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if (ret == -EAGAIN) {
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ret = tegra_gpio_wake_table[wake];
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if (ret != -EINVAL)
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ret = gpio_to_irq(ret);
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}
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return ret;
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}
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int get_wakeup_reason_irq(void)
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{
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int irq;
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struct irq_desc *desc;
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int i, j;
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u32 wake_status[3];
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int len;
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len = tegra_read_wake_status(wake_status);
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for (i = 0; i < len; i++) {
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unsigned long temp = wake_status[i];
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for_each_set_bit(j, &temp, 32) {
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irq = tegra_wake_to_irq(j + (i * 32));
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if (!irq)
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continue;
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desc = irq_to_desc(irq);
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if (!desc || !desc->action || !desc->action->name)
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continue;
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return irq;
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}
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}
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return -EINVAL;
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}
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EXPORT_SYMBOL_GPL(get_wakeup_reason_irq);
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