<commit_before>/*
 * exynos_tmu.c - Samsung EXYNOS TMU (Thermal Management Unit)
 *
 *  Copyright (C) 2011 Samsung Electronics
 *  <NAME> <<EMAIL>>
 *  <NAME> <<EMAIL>>
 *
 * 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.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include <linux/clk.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>

#include "exynos_thermal_common.h"
#include "exynos_tmu.h"
#include "exynos_tmu_data.h"

/**
 * struct exynos_tmu_data : A structure to hold the private data of the TMU
	driver
 * @id: identifier of the one instance of the TMU controller.
 * @pdata: pointer to the tmu platform/configuration data
 * @base: base address of the single instance of the TMU controller.
 * @base_common: base address of the common registers of the TMU controller.
 * @irq: irq number of the TMU controller.
 * @soc: id of the SOC type.
 * @irq_work: pointer to the irq work structure.
 * @lock: lock to implement synchronization.
 * @clk: pointer to the clock structure.
 * @temp_error1: fused value of the first point trim.
 * @temp_error2: fused value of the second point trim.
 * @reg_conf: pointer to structure to register with core thermal.
 */
struct exynos_tmu_data {
	int id;
	struct exynos_tmu_platform_data *pdata;
	void __iomem *base;
	void __iomem *base_common;
	int irq;
	enum soc_type soc;
	struct work_struct irq_work;
	struct mutex lock;
	struct clk *clk;
	u8 temp_error1, temp_error2;
	struct thermal_sensor_conf *reg_conf;
};

/*
 * TMU treats temperature as a mapped temperature code.
 * The temperature is converted differently depending on the calibration type.
 */
static int temp_to_code(struct exynos_tmu_data *data, u8 temp)
{
	struct exynos_tmu_platform_data *pdata = data->pdata;
	int temp_code;

	if (data->soc == SOC_ARCH_EXYNOS4210)
		/* temp should range between 25 and 125 */
		if (temp < 25 || temp > 125) {
			temp_code = -EINVAL;
			goto out;
		}

	switch (pdata->cal_type) {
	case TYPE_TWO_POINT_TRIMMING:
		temp_code = (temp - pdata->first_point_trim) *
			(data->temp_error2 - data->temp_error1) /
			(pdata->second_point_trim - pdata->first_point_trim) +
			data->temp_error1;
		break;
	case TYPE_ONE_POINT_TRIMMING:
		temp_code = temp + data->temp_error1 - pdata->first_point_trim;
		break;
	default:
		temp_code = temp + pdata->default_temp_offset;
		break;
	}
out:
	return temp_code;
}

/*
 * Calculate a temperature value from a temperature code.
 * The unit of the temperature is degree Celsius.
 */
static int code_to_temp(struct exynos_tmu_data *data, u8 temp_code)
{
	struct exynos_tmu_platform_data *pdata = data->pdata;
	int temp;

	if (data->soc == SOC_ARCH_EXYNOS4210)
		/* temp_code should range between 75 and 175 */
		if (temp_code < 75 || temp_code > 175) {
			temp = -ENODATA;
			goto out;
		}

	switch (pdata->cal_type) {
	case TYPE_TWO_POINT_TRIMMING:
		temp = (temp_code - data->temp_error1) *
			(pdata->second_point_trim - pdata->first_point_trim) /
			(data->temp_error2 - data->temp_error1) +
			pdata->first_point_trim;
		break;
	case TYPE_ONE_POINT_TRIMMING:
		temp = temp_code - data->temp_error1 + pdata->first_point_trim;
		break;
	default:
		temp = temp_code - pdata->default_temp_offset;
		break;
	}
out:
	return temp;
}

static int exynos_tmu_initialize(struct platform_device *pdev)
{
	struct exynos_tmu_data *data = platform_get_drvdata(pdev);
	struct exynos_tmu_platform_data *pdata = data->pdata;
	const struct exynos_tmu_registers *reg = pdata->registers;
	unsigned int status, trim_info = 0, con;
	unsigned int rising_threshold = 0, falling_threshold = 0;
	int ret = 0, threshold_code, i, trigger_levs = 0;

	mutex_lock(&data->lock);
	clk_enable(data->clk);

	if (TMU_SUPPORTS(pdata, READY_STATUS)) {
		status = readb(data->base + reg->tmu_status);
		if (!status) {
			ret = -EBUSY;
			goto out;
		}
	}

	if (TMU_SUPPORTS(pdata, TRIM_RELOAD))
		__raw_writel(1, data->base + reg->triminfo_ctrl);

	/* Save trimming info in order to perform calibration */
	if (data->soc == SOC_ARCH_EXYNOS5440) {
		/*
		 * For exynos5440 soc triminfo value is swapped between TMU0 and
		 * TMU2, so the below logic is needed.
		 */
		switch (data->id) {
		case 0:
			trim_info = readl(data->base +
			EXYNOS5440_EFUSE_SWAP_OFFSET + reg->triminfo_data);
			break;
		case 1:
			trim_info = readl(data->base + reg->triminfo_data);
			break;
		case 2:
			trim_info = readl(data->base -
			EXYNOS5440_EFUSE_SWAP_OFFSET + reg->triminfo_data);
		}
	} else {
		trim_info = readl(data->base + reg->triminfo_data);
	}
	data->temp_error1 = trim_info & EXYNOS_TMU_TEMP_MASK;
	data->temp_error2 = ((trim_info >> reg->triminfo_85_shift) &
				EXYNOS_TMU_TEMP_MASK);

	if ((pdata->min_efuse_value > data->temp_error1) ||
			(data->temp_error1 > pdata->max_efuse_value) ||
			(data->temp_error2 != 0))
		data->temp_error1 = pdata->efuse_value;

	if (pdata->max_trigger_level > MAX_THRESHOLD_LEVS) {
		dev_err(&pdev->dev, "Invalid max trigger level\n");
		goto out;
	}

	for (i = 0; i < pdata->max_trigger_level; i++) {
		if (!pdata->trigger_levels[i])
			continue;

		if ((pdata->trigger_type[i] == HW_TRIP) &&
		(!pdata->trigger_levels[pdata->max_trigger_level - 1])) {
			dev_err(&pdev->dev, "Invalid hw trigger level\n");<commit_msg>thermal: exynos: Fix to set the second point correction value<commit_after>/*
 * exynos_tmu.c - Samsung EXYNOS TMU (Thermal Management Unit)
 *
 *  Copyright (C) 2011 Samsung Electronics
 *  <NAME> <<EMAIL>>
 *  <NAME> <<EMAIL>>
 *
 * 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.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include <linux/clk.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>

#include "exynos_thermal_common.h"
#include "exynos_tmu.h"
#include "exynos_tmu_data.h"

/**
 * struct exynos_tmu_data : A structure to hold the private data of the TMU
	driver
 * @id: identifier of the one instance of the TMU controller.
 * @pdata: pointer to the tmu platform/configuration data
 * @base: base address of the single instance of the TMU controller.
 * @base_common: base address of the common registers of the TMU controller.
 * @irq: irq number of the TMU controller.
 * @soc: id of the SOC type.
 * @irq_work: pointer to the irq work structure.
 * @lock: lock to implement synchronization.
 * @clk: pointer to the clock structure.
 * @temp_error1: fused value of the first point trim.
 * @temp_error2: fused value of the second point trim.
 * @reg_conf: pointer to structure to register with core thermal.
 */
struct exynos_tmu_data {
	int id;
	struct exynos_tmu_platform_data *pdata;
	void __iomem *base;
	void __iomem *base_common;
	int irq;
	enum soc_type soc;
	struct work_struct irq_work;
	struct mutex lock;
	struct clk *clk;
	u8 temp_error1, temp_error2;
	struct thermal_sensor_conf *reg_conf;
};

/*
 * TMU treats temperature as a mapped temperature code.
 * The temperature is converted differently depending on the calibration type.
 */
static int temp_to_code(struct exynos_tmu_data *data, u8 temp)
{
	struct exynos_tmu_platform_data *pdata = data->pdata;
	int temp_code;

	if (data->soc == SOC_ARCH_EXYNOS4210)
		/* temp should range between 25 and 125 */
		if (temp < 25 || temp > 125) {
			temp_code = -EINVAL;
			goto out;
		}

	switch (pdata->cal_type) {
	case TYPE_TWO_POINT_TRIMMING:
		temp_code = (temp - pdata->first_point_trim) *
			(data->temp_error2 - data->temp_error1) /
			(pdata->second_point_trim - pdata->first_point_trim) +
			data->temp_error1;
		break;
	case TYPE_ONE_POINT_TRIMMING:
		temp_code = temp + data->temp_error1 - pdata->first_point_trim;
		break;
	default:
		temp_code = temp + pdata->default_temp_offset;
		break;
	}
out:
	return temp_code;
}

/*
 * Calculate a temperature value from a temperature code.
 * The unit of the temperature is degree Celsius.
 */
static int code_to_temp(struct exynos_tmu_data *data, u8 temp_code)
{
	struct exynos_tmu_platform_data *pdata = data->pdata;
	int temp;

	if (data->soc == SOC_ARCH_EXYNOS4210)
		/* temp_code should range between 75 and 175 */
		if (temp_code < 75 || temp_code > 175) {
			temp = -ENODATA;
			goto out;
		}

	switch (pdata->cal_type) {
	case TYPE_TWO_POINT_TRIMMING:
		temp = (temp_code - data->temp_error1) *
			(pdata->second_point_trim - pdata->first_point_trim) /
			(data->temp_error2 - data->temp_error1) +
			pdata->first_point_trim;
		break;
	case TYPE_ONE_POINT_TRIMMING:
		temp = temp_code - data->temp_error1 + pdata->first_point_trim;
		break;
	default:
		temp = temp_code - pdata->default_temp_offset;
		break;
	}
out:
	return temp;
}

static int exynos_tmu_initialize(struct platform_device *pdev)
{
	struct exynos_tmu_data *data = platform_get_drvdata(pdev);
	struct exynos_tmu_platform_data *pdata = data->pdata;
	const struct exynos_tmu_registers *reg = pdata->registers;
	unsigned int status, trim_info = 0, con;
	unsigned int rising_threshold = 0, falling_threshold = 0;
	int ret = 0, threshold_code, i, trigger_levs = 0;

	mutex_lock(&data->lock);
	clk_enable(data->clk);

	if (TMU_SUPPORTS(pdata, READY_STATUS)) {
		status = readb(data->base + reg->tmu_status);
		if (!status) {
			ret = -EBUSY;
			goto out;
		}
	}

	if (TMU_SUPPORTS(pdata, TRIM_RELOAD))
		__raw_writel(1, data->base + reg->triminfo_ctrl);

	/* Save trimming info in order to perform calibration */
	if (data->soc == SOC_ARCH_EXYNOS5440) {
		/*
		 * For exynos5440 soc triminfo value is swapped between TMU0 and
		 * TMU2, so the below logic is needed.
		 */
		switch (data->id) {
		case 0:
			trim_info = readl(data->base +
			EXYNOS5440_EFUSE_SWAP_OFFSET + reg->triminfo_data);
			break;
		case 1:
			trim_info = readl(data->base + reg->triminfo_data);
			break;
		case 2:
			trim_info = readl(data->base -
			EXYNOS5440_EFUSE_SWAP_OFFSET + reg->triminfo_data);
		}
	} else {
		trim_info = readl(data->base + reg->triminfo_data);
	}
	data->temp_error1 = trim_info & EXYNOS_TMU_TEMP_MASK;
	data->temp_error2 = ((trim_info >> reg->triminfo_85_shift) &
				EXYNOS_TMU_TEMP_MASK);

	if (!data->temp_error1 ||
		(pdata->min_efuse_value > data->temp_error1) ||
		(data->temp_error1 > pdata->max_efuse_value))
		data->temp_error1 = pdata->efuse_value & EXYNOS_TMU_TEMP_MASK;

	if (!data->temp_error2)
		data->temp_error2 =
			(pdata->efuse_value >> reg->triminfo_85_shift) &
			EXYNOS_TMU_TEMP_MASK;

	if (pdata->max_trigger_level > MAX_THRESHOLD_LEVS) {
		dev_err(&pdev->dev, "Invalid max trigger level\n");
		goto out;
	}

	for (i = 0; i < pdata->max_trigger_level; i++) {
		if (!pdata->trigger_levels[i])
			continue;

		if ((pdata->trigger_type[i] == HW_TRIP) &&
		(!pdata->trigger_levels[pdata->max_trigger_level - 1])) {
			dev_err(&pdev->dev, "Invalid hw trigger level\n");
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