/*
 * drivers/power/axp/axp22x/axp22x-powerkey.c
 * (C) Copyright 2010-2016
 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
 * Pannan <pannan@allwinnertech.com>
 *
 * powerkey driver of axp22x
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/device.h>
#include <linux/workqueue.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/slab.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/input.h>
#include "../axp-core.h"
#include "../axp-powerkey.h"
#include "axp22x.h"

static int axp22x_powerkey_probe(struct platform_device *pdev)
{
	struct axp_dev *axp_dev = dev_get_drvdata(pdev->dev.parent);
	struct axp_powerkey_info *info;
	struct input_dev *powerkey_dev;
	int err = 0, i, irq, ret;
	struct axp_regmap *map = axp_dev->regmap;
	u8 val;

	if (pdev->dev.of_node) {
		/* get dt and sysconfig */
		ret = axp_powerkey_dt_parse(pdev->dev.of_node, &axp22x_config);
		if (ret) {
			pr_err("%s parse device tree err\n", __func__);
			return -EINVAL;
		}
	} else {
		pr_err("axp22x powerkey device tree err!\n");
		return -EBUSY;
	}

	info = kzalloc(sizeof(struct axp_powerkey_info), GFP_KERNEL);
	if (!info)
		return -ENOMEM;

	info->chip = axp_dev;

	/* register input device */
	powerkey_dev = input_allocate_device();
	if (!powerkey_dev) {
		pr_err("alloc powerkey input device error\n");
		goto out;
	}

	powerkey_dev->name = pdev->name;
	powerkey_dev->phys = "m1kbd/input2";
	powerkey_dev->id.bustype = BUS_HOST;
	powerkey_dev->id.vendor = 0x0001;
	powerkey_dev->id.product = 0x0001;
	powerkey_dev->id.version = 0x0100;
	powerkey_dev->open = NULL;
	powerkey_dev->close = NULL;
	powerkey_dev->dev.parent = &pdev->dev;
	set_bit(EV_KEY, powerkey_dev->evbit);
	set_bit(EV_REL, powerkey_dev->evbit);
	set_bit(KEY_POWER, powerkey_dev->keybit);

	err = input_register_device(powerkey_dev);
	if (err) {
		pr_err("Unable to Register the axp_powerkey\n");
		goto out_reg;
	}

	info->idev = powerkey_dev;

	for (i = 0; i < ARRAY_SIZE(axp_powerkey_irq); i++) {
		irq = platform_get_irq_byname(pdev, axp_powerkey_irq[i].name);
		if (irq < 0)
			continue;

		err = axp_request_irq(axp_dev, irq,
				axp_powerkey_irq[i].isr, info);
		if (err != 0) {
			dev_err(&pdev->dev, "failed to request %s IRQ %d: %d\n"
					, axp_powerkey_irq[i].name, irq, err);
			goto out_irq;
		}

		dev_dbg(&pdev->dev, "Requested %s IRQ %d: %d\n",
				axp_powerkey_irq[i].name, irq, err);
	}

	platform_set_drvdata(pdev, info);

	axp_regmap_read(map, AXP22X_POK_SET, &val);
	if (axp22x_config.pmu_powkey_on_time < 1000)
		val &= 0x3f;
	else if (axp22x_config.pmu_powkey_on_time < 2000) {
		val &= 0x3f;
		val |= 0x40;
	} else if (axp22x_config.pmu_powkey_on_time < 3000) {
		val &= 0x3f;
		val |= 0x80;
	} else {
		val &= 0x3f;
		val |= 0xc0;
	}
	axp_regmap_write(map, AXP22X_POK_SET, val);

	/* pok long time set*/
	if (axp22x_config.pmu_powkey_long_time < 1000)
		axp22x_config.pmu_powkey_long_time = 1000;

	if (axp22x_config.pmu_powkey_long_time > 2500)
		axp22x_config.pmu_powkey_long_time = 2500;

	axp_regmap_read(map, AXP22X_POK_SET, &val);
	val &= 0xcf;
	val |= (((axp22x_config.pmu_powkey_long_time - 1000) / 500) << 4);
	axp_regmap_write(map, AXP22X_POK_SET, val);

	/* pek offlevel poweroff en set*/
	if (axp22x_config.pmu_powkey_off_en)
		axp22x_config.pmu_powkey_off_en = 1;
	else
		axp22x_config.pmu_powkey_off_en = 0;

	axp_regmap_read(map, AXP22X_POK_SET, &val);
	val &= 0xf7;
	val |= (axp22x_config.pmu_powkey_off_en << 3);
	axp_regmap_write(map, AXP22X_POK_SET, val);

	/*Init offlevel restart or not */
	if (axp22x_config.pmu_powkey_off_func)
		axp_regmap_set_bits(map, AXP22X_POK_SET, 0x04); /* restart */
	else
		axp_regmap_clr_bits(map, AXP22X_POK_SET, 0x04); /* not restart*/

	/* pek delay set */
	axp_regmap_read(map, AXP22X_OFF_CTL, &val);
	val &= 0xfc;
	if (axp22x_config.pmu_pwrok_time < 32)
		val |= ((axp22x_config.pmu_pwrok_time / 8) - 1);
	else
		val |= ((axp22x_config.pmu_pwrok_time / 32) + 1);
	axp_regmap_write(map, AXP22X_OFF_CTL, val);

	/* pek offlevel time set */
	if (axp22x_config.pmu_powkey_off_time < 4000)
		axp22x_config.pmu_powkey_off_time = 4000;

	if (axp22x_config.pmu_powkey_off_time > 10000)
		axp22x_config.pmu_powkey_off_time = 10000;

	axp_regmap_read(map, AXP22X_POK_SET, &val);
	val &= 0xfc;
	val |= (axp22x_config.pmu_powkey_off_time - 4000) / 2000;
	axp_regmap_write(map, AXP22X_POK_SET, val);

	return 0;

out_irq:
	for (i = i - 1; i >= 0; i--) {
		irq = platform_get_irq_byname(pdev, axp_powerkey_irq[i].name);
		if (irq < 0)
			continue;
		axp_free_irq(axp_dev, irq);
	}
out_reg:
	input_free_device(powerkey_dev);
out:
	kfree(info);
	return err;
}

static int axp22x_powerkey_remove(struct platform_device *pdev)
{
	int i, irq;
	struct axp_powerkey_info *info = platform_get_drvdata(pdev);
	struct axp_dev *axp_dev = dev_get_drvdata(pdev->dev.parent);

	for (i = 0; i < ARRAY_SIZE(axp_powerkey_irq); i++) {
		irq = platform_get_irq_byname(pdev, axp_powerkey_irq[i].name);
		if (irq < 0)
			continue;
		axp_free_irq(axp_dev, irq);
	}

	input_unregister_device(info->idev);
	kfree(info);

	return 0;
}

static const struct of_device_id axp22x_powerkey_dt_ids[] = {
	{ .compatible = "axp221s-powerkey", },
	{ .compatible = "axp223-powerkey",  },
	{ .compatible = "axp227-powerkey",  },
	{ .compatible = "axp233-powerkey",  },
	{},
};
MODULE_DEVICE_TABLE(of, axp22x_powerkey_dt_ids);

static struct platform_driver axp22x_powerkey_driver = {
	.driver = {
		.name = "axp22x-powerkey",
		.of_match_table = axp22x_powerkey_dt_ids,
	},
	.probe  = axp22x_powerkey_probe,
	.remove = axp22x_powerkey_remove,
};

static int __init axp22x_powerkey_initcall(void)
{
	int ret;

	ret = platform_driver_register(&axp22x_powerkey_driver);
	if (IS_ERR_VALUE(ret)) {
		pr_err("%s: failed, errno %d\n", __func__, ret);
		return -EINVAL;
	}

	return 0;
}
module_init(axp22x_powerkey_initcall);

MODULE_DESCRIPTION("Powerkey driver of axp22x");
MODULE_AUTHOR("pannan");
MODULE_LICENSE("GPL");