[linux-block.git] / drivers / thermal / rcar_thermal.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  R-Car THS/TSC thermal sensor driver
 *
 * Copyright (C) 2012 Renesas Solutions Corp.
 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 */
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/reboot.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/thermal.h>

#include "thermal_hwmon.h"

#define IDLE_INTERVAL	5000

#define COMMON_STR	0x00
#define COMMON_ENR	0x04
#define COMMON_INTMSK	0x0c

#define REG_POSNEG	0x20
#define REG_FILONOFF	0x28
#define REG_THSCR	0x2c
#define REG_THSSR	0x30
#define REG_INTCTRL	0x34

/* THSCR */
#define CPCTL	(1 << 12)

/* THSSR */
#define CTEMP	0x3f

struct rcar_thermal_common {
	void __iomem *base;
	struct device *dev;
	struct list_head head;
	spinlock_t lock;
};

struct rcar_thermal_chip {
	unsigned int use_of_thermal : 1;
	unsigned int has_filonoff : 1;
	unsigned int irq_per_ch : 1;
	unsigned int needs_suspend_resume : 1;
	unsigned int nirqs;
	unsigned int ctemp_bands;
};

static const struct rcar_thermal_chip rcar_thermal = {
	.use_of_thermal = 0,
	.has_filonoff = 1,
	.irq_per_ch = 0,
	.needs_suspend_resume = 0,
	.nirqs = 1,
	.ctemp_bands = 1,
};

static const struct rcar_thermal_chip rcar_gen2_thermal = {
	.use_of_thermal = 1,
	.has_filonoff = 1,
	.irq_per_ch = 0,
	.needs_suspend_resume = 0,
	.nirqs = 1,
	.ctemp_bands = 1,
};

static const struct rcar_thermal_chip rcar_gen3_thermal = {
	.use_of_thermal = 1,
	.has_filonoff = 0,
	.irq_per_ch = 1,
	.needs_suspend_resume = 1,
	/*
	 * The Gen3 chip has 3 interrupts, but this driver uses only 2
	 * interrupts to detect a temperature change, rise or fall.
	 */
	.nirqs = 2,
	.ctemp_bands = 2,
};

struct rcar_thermal_priv {
	void __iomem *base;
	struct rcar_thermal_common *common;
	struct thermal_zone_device *zone;
	const struct rcar_thermal_chip *chip;
	struct delayed_work work;
	struct mutex lock;
	struct list_head list;
	int id;
};

#define rcar_thermal_for_each_priv(pos, common)	\
	list_for_each_entry(pos, &common->head, list)

#define MCELSIUS(temp)			((temp) * 1000)
#define rcar_zone_to_priv(zone)		((zone)->devdata)
#define rcar_priv_to_dev(priv)		((priv)->common->dev)
#define rcar_has_irq_support(priv)	((priv)->common->base)
#define rcar_id_to_shift(priv)		((priv)->id * 8)

static const struct of_device_id rcar_thermal_dt_ids[] = {
	{
		.compatible = "renesas,rcar-thermal",
		.data = &rcar_thermal,
	},
	{
		.compatible = "renesas,rcar-gen2-thermal",
		 .data = &rcar_gen2_thermal,
	},
	{
		.compatible = "renesas,thermal-r8a774c0",
		.data = &rcar_gen3_thermal,
	},
	{
		.compatible = "renesas,thermal-r8a77970",
		.data = &rcar_gen3_thermal,
	},
	{
		.compatible = "renesas,thermal-r8a77990",
		.data = &rcar_gen3_thermal,
	},
	{
		.compatible = "renesas,thermal-r8a77995",
		.data = &rcar_gen3_thermal,
	},
	{},
};
MODULE_DEVICE_TABLE(of, rcar_thermal_dt_ids);

/*
 *		basic functions
 */
#define rcar_thermal_common_read(c, r) \
	_rcar_thermal_common_read(c, COMMON_ ##r)
static u32 _rcar_thermal_common_read(struct rcar_thermal_common *common,
				     u32 reg)
{
	return ioread32(common->base + reg);
}

#define rcar_thermal_common_write(c, r, d) \
	_rcar_thermal_common_write(c, COMMON_ ##r, d)
static void _rcar_thermal_common_write(struct rcar_thermal_common *common,
				       u32 reg, u32 data)
{
	iowrite32(data, common->base + reg);
}

#define rcar_thermal_common_bset(c, r, m, d) \
	_rcar_thermal_common_bset(c, COMMON_ ##r, m, d)
static void _rcar_thermal_common_bset(struct rcar_thermal_common *common,
				      u32 reg, u32 mask, u32 data)
{
	u32 val;

	val = ioread32(common->base + reg);
	val &= ~mask;
	val |= (data & mask);
	iowrite32(val, common->base + reg);
}

#define rcar_thermal_read(p, r) _rcar_thermal_read(p, REG_ ##r)
static u32 _rcar_thermal_read(struct rcar_thermal_priv *priv, u32 reg)
{
	return ioread32(priv->base + reg);
}

#define rcar_thermal_write(p, r, d) _rcar_thermal_write(p, REG_ ##r, d)
static void _rcar_thermal_write(struct rcar_thermal_priv *priv,
				u32 reg, u32 data)
{
	iowrite32(data, priv->base + reg);
}

#define rcar_thermal_bset(p, r, m, d) _rcar_thermal_bset(p, REG_ ##r, m, d)
static void _rcar_thermal_bset(struct rcar_thermal_priv *priv, u32 reg,
			       u32 mask, u32 data)
{
	u32 val;

	val = ioread32(priv->base + reg);
	val &= ~mask;
	val |= (data & mask);
	iowrite32(val, priv->base + reg);
}

/*
 *		zone device functions
 */
static int rcar_thermal_update_temp(struct rcar_thermal_priv *priv)
{
	struct device *dev = rcar_priv_to_dev(priv);
	int old, new, ctemp = -EINVAL;
	unsigned int i;

	mutex_lock(&priv->lock);

	/*
	 * TSC decides a value of CPTAP automatically,
	 * and this is the conditions which validate interrupt.
	 */
	rcar_thermal_bset(priv, THSCR, CPCTL, CPCTL);

	old = ~0;
	for (i = 0; i < 128; i++) {
		/*
		 * we need to wait 300us after changing comparator offset
		 * to get stable temperature.
		 * see "Usage Notes" on datasheet
		 */
		usleep_range(300, 400);

		new = rcar_thermal_read(priv, THSSR) & CTEMP;
		if (new == old) {
			ctemp = new;
			break;
		}
		old = new;
	}

	if (ctemp < 0) {
		dev_err(dev, "thermal sensor was broken\n");
		goto err_out_unlock;
	}

	/*
	 * enable IRQ
	 */
	if (rcar_has_irq_support(priv)) {
		if (priv->chip->has_filonoff)
			rcar_thermal_write(priv, FILONOFF, 0);

		/* enable Rising/Falling edge interrupt */
		rcar_thermal_write(priv, POSNEG,  0x1);
		rcar_thermal_write(priv, INTCTRL, (((ctemp - 0) << 8) |
						   ((ctemp - 1) << 0)));
	}

err_out_unlock:
	mutex_unlock(&priv->lock);

	return ctemp;
}

static int rcar_thermal_get_current_temp(struct rcar_thermal_priv *priv,
					 int *temp)
{
	int ctemp;

	ctemp = rcar_thermal_update_temp(priv);
	if (ctemp < 0)
		return ctemp;

	/* Guaranteed operating range is -45C to 125C. */

	if (priv->chip->ctemp_bands == 1)
		*temp = MCELSIUS((ctemp * 5) - 65);
	else if (ctemp < 24)
		*temp = MCELSIUS(((ctemp * 55) - 720) / 10);
	else
		*temp = MCELSIUS((ctemp * 5) - 60);

	return 0;
}

static int rcar_thermal_of_get_temp(void *data, int *temp)
{
	struct rcar_thermal_priv *priv = data;

	return rcar_thermal_get_current_temp(priv, temp);
}

static int rcar_thermal_get_temp(struct thermal_zone_device *zone, int *temp)
{
	struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone);

	return rcar_thermal_get_current_temp(priv, temp);
}

static int rcar_thermal_get_trip_type(struct thermal_zone_device *zone,
				      int trip, enum thermal_trip_type *type)
{
	struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone);
	struct device *dev = rcar_priv_to_dev(priv);

	/* see rcar_thermal_get_temp() */
	switch (trip) {
	case 0: /* +90 <= temp */
		*type = THERMAL_TRIP_CRITICAL;
		break;
	default:
		dev_err(dev, "rcar driver trip error\n");
		return -EINVAL;
	}

	return 0;
}

static int rcar_thermal_get_trip_temp(struct thermal_zone_device *zone,
				      int trip, int *temp)
{
	struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone);
	struct device *dev = rcar_priv_to_dev(priv);

	/* see rcar_thermal_get_temp() */
	switch (trip) {
	case 0: /* +90 <= temp */
		*temp = MCELSIUS(90);
		break;
	default:
		dev_err(dev, "rcar driver trip error\n");
		return -EINVAL;
	}

	return 0;
}

static const struct thermal_zone_of_device_ops rcar_thermal_zone_of_ops = {
	.get_temp	= rcar_thermal_of_get_temp,
};

static struct thermal_zone_device_ops rcar_thermal_zone_ops = {
	.get_temp	= rcar_thermal_get_temp,
	.get_trip_type	= rcar_thermal_get_trip_type,
	.get_trip_temp	= rcar_thermal_get_trip_temp,
};

/*
 *		interrupt
 */
#define rcar_thermal_irq_enable(p)	_rcar_thermal_irq_ctrl(p, 1)
#define rcar_thermal_irq_disable(p)	_rcar_thermal_irq_ctrl(p, 0)
static void _rcar_thermal_irq_ctrl(struct rcar_thermal_priv *priv, int enable)
{
	struct rcar_thermal_common *common = priv->common;
	unsigned long flags;
	u32 mask = 0x3 << rcar_id_to_shift(priv); /* enable Rising/Falling */

	if (!rcar_has_irq_support(priv))
		return;

	spin_lock_irqsave(&common->lock, flags);

	rcar_thermal_common_bset(common, INTMSK, mask, enable ? 0 : mask);

	spin_unlock_irqrestore(&common->lock, flags);
}

static void rcar_thermal_work(struct work_struct *work)
{
	struct rcar_thermal_priv *priv;
	int ret;

	priv = container_of(work, struct rcar_thermal_priv, work.work);

	ret = rcar_thermal_update_temp(priv);
	if (ret < 0)
		return;

	rcar_thermal_irq_enable(priv);

	thermal_zone_device_update(priv->zone, THERMAL_EVENT_UNSPECIFIED);
}

static u32 rcar_thermal_had_changed(struct rcar_thermal_priv *priv, u32 status)
{
	struct device *dev = rcar_priv_to_dev(priv);

	status = (status >> rcar_id_to_shift(priv)) & 0x3;

	if (status) {
		dev_dbg(dev, "thermal%d %s%s\n",
			priv->id,
			(status & 0x2) ? "Rising " : "",
			(status & 0x1) ? "Falling" : "");
	}

	return status;
}

static irqreturn_t rcar_thermal_irq(int irq, void *data)
{
	struct rcar_thermal_common *common = data;
	struct rcar_thermal_priv *priv;
	u32 status, mask;

	spin_lock(&common->lock);

	mask	= rcar_thermal_common_read(common, INTMSK);
	status	= rcar_thermal_common_read(common, STR);
	rcar_thermal_common_write(common, STR, 0x000F0F0F & mask);

	spin_unlock(&common->lock);

	status = status & ~mask;

	/*
	 * check the status
	 */
	rcar_thermal_for_each_priv(priv, common) {
		if (rcar_thermal_had_changed(priv, status)) {
			rcar_thermal_irq_disable(priv);
			queue_delayed_work(system_freezable_wq, &priv->work,
					   msecs_to_jiffies(300));
		}
	}

	return IRQ_HANDLED;
}

/*
 *		platform functions
 */
static int rcar_thermal_remove(struct platform_device *pdev)
{
	struct rcar_thermal_common *common = platform_get_drvdata(pdev);
	struct device *dev = &pdev->dev;
	struct rcar_thermal_priv *priv;

	rcar_thermal_for_each_priv(priv, common) {
		rcar_thermal_irq_disable(priv);
		cancel_delayed_work_sync(&priv->work);
		if (priv->chip->use_of_thermal)
			thermal_remove_hwmon_sysfs(priv->zone);
		else
			thermal_zone_device_unregister(priv->zone);
	}

	pm_runtime_put(dev);
	pm_runtime_disable(dev);

	return 0;
}

static int rcar_thermal_probe(struct platform_device *pdev)
{
	struct rcar_thermal_common *common;
	struct rcar_thermal_priv *priv;
	struct device *dev = &pdev->dev;
	struct resource *res, *irq;
	const struct rcar_thermal_chip *chip = of_device_get_match_data(dev);
	int mres = 0;
	int i;
	int ret = -ENODEV;
	int idle = IDLE_INTERVAL;
	u32 enr_bits = 0;

	common = devm_kzalloc(dev, sizeof(*common), GFP_KERNEL);
	if (!common)
		return -ENOMEM;

	platform_set_drvdata(pdev, common);

	INIT_LIST_HEAD(&common->head);
	spin_lock_init(&common->lock);
	common->dev = dev;

	pm_runtime_enable(dev);
	pm_runtime_get_sync(dev);

	for (i = 0; i < chip->nirqs; i++) {
		irq = platform_get_resource(pdev, IORESOURCE_IRQ, i);
		if (!irq)
			continue;
		if (!common->base) {
			/*
			 * platform has IRQ support.
			 * Then, driver uses common registers
			 * rcar_has_irq_support() will be enabled
			 */
			res = platform_get_resource(pdev, IORESOURCE_MEM,
						    mres++);
			common->base = devm_ioremap_resource(dev, res);
			if (IS_ERR(common->base)) {
				ret = PTR_ERR(common->base);
				goto error_unregister;
			}

			idle = 0; /* polling delay is not needed */
		}

		ret = devm_request_irq(dev, irq->start, rcar_thermal_irq,
				       IRQF_SHARED, dev_name(dev), common);
		if (ret) {
			dev_err(dev, "irq request failed\n ");
			goto error_unregister;
		}

		/* update ENR bits */
		if (chip->irq_per_ch)
			enr_bits |= 1 << i;
	}

	for (i = 0;; i++) {
		res = platform_get_resource(pdev, IORESOURCE_MEM, mres++);
		if (!res)
			break;

		priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
		if (!priv) {
			ret = -ENOMEM;
			goto error_unregister;
		}

		priv->base = devm_ioremap_resource(dev, res);
		if (IS_ERR(priv->base)) {
			ret = PTR_ERR(priv->base);
			goto error_unregister;
		}

		priv->common = common;
		priv->id = i;
		priv->chip = chip;
		mutex_init(&priv->lock);
		INIT_LIST_HEAD(&priv->list);
		INIT_DELAYED_WORK(&priv->work, rcar_thermal_work);
		ret = rcar_thermal_update_temp(priv);
		if (ret < 0)
			goto error_unregister;

		if (chip->use_of_thermal) {
			priv->zone = devm_thermal_zone_of_sensor_register(
						dev, i, priv,
						&rcar_thermal_zone_of_ops);
		} else {
			priv->zone = thermal_zone_device_register(
						"rcar_thermal",
						1, 0, priv,
						&rcar_thermal_zone_ops, NULL, 0,
						idle);

			ret = thermal_zone_device_enable(priv->zone);
			if (ret) {
				thermal_zone_device_unregister(priv->zone);
				priv->zone = ERR_PTR(ret);
			}
		}
		if (IS_ERR(priv->zone)) {
			dev_err(dev, "can't register thermal zone\n");
			ret = PTR_ERR(priv->zone);
			priv->zone = NULL;
			goto error_unregister;
		}

		if (chip->use_of_thermal) {
			/*
			 * thermal_zone doesn't enable hwmon as default,
			 * but, enable it here to keep compatible
			 */
			priv->zone->tzp->no_hwmon = false;
			ret = thermal_add_hwmon_sysfs(priv->zone);
			if (ret)
				goto error_unregister;
		}

		rcar_thermal_irq_enable(priv);

		list_move_tail(&priv->list, &common->head);

		/* update ENR bits */
		if (!chip->irq_per_ch)
			enr_bits |= 3 << (i * 8);
	}

	if (common->base && enr_bits)
		rcar_thermal_common_write(common, ENR, enr_bits);

	dev_info(dev, "%d sensor probed\n", i);

	return 0;

error_unregister:
	rcar_thermal_remove(pdev);

	return ret;
}

#ifdef CONFIG_PM_SLEEP
static int rcar_thermal_suspend(struct device *dev)
{
	struct rcar_thermal_common *common = dev_get_drvdata(dev);
	struct rcar_thermal_priv *priv = list_first_entry(&common->head,
							  typeof(*priv), list);

	if (priv->chip->needs_suspend_resume) {
		rcar_thermal_common_write(common, ENR, 0);
		rcar_thermal_irq_disable(priv);
		rcar_thermal_bset(priv, THSCR, CPCTL, 0);
	}

	return 0;
}

static int rcar_thermal_resume(struct device *dev)
{
	struct rcar_thermal_common *common = dev_get_drvdata(dev);
	struct rcar_thermal_priv *priv = list_first_entry(&common->head,
							  typeof(*priv), list);
	int ret;

	if (priv->chip->needs_suspend_resume) {
		ret = rcar_thermal_update_temp(priv);
		if (ret < 0)
			return ret;
		rcar_thermal_irq_enable(priv);
		rcar_thermal_common_write(common, ENR, 0x03);
	}

	return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(rcar_thermal_pm_ops, rcar_thermal_suspend,
			 rcar_thermal_resume);

static struct platform_driver rcar_thermal_driver = {
	.driver	= {
		.name	= "rcar_thermal",
		.pm = &rcar_thermal_pm_ops,
		.of_match_table = rcar_thermal_dt_ids,
	},
	.probe		= rcar_thermal_probe,
	.remove		= rcar_thermal_remove,
};
module_platform_driver(rcar_thermal_driver);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("R-Car THS/TSC thermal sensor driver");
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
Commit	Line	Data
c9545790	1	// SPDX-License-Identifier: GPL-2.0
1e426ffd KM	2	/*
	3	* R-Car THS/TSC thermal sensor driver
	4	*
	5	* Copyright (C) 2012 Renesas Solutions Corp.
	6	* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
1e426ffd KM	7	*/
	8	#include <linux/delay.h>
	9	#include <linux/err.h>
e0a5172e KM	10	#include <linux/irq.h>
e0a5172e KM	11	#include <linux/interrupt.h>
1e426ffd KM	12	#include <linux/io.h>
1e426ffd KM	13	#include <linux/module.h>
8b477ea5	14	#include <linux/of_device.h>
1e426ffd	15	#include <linux/platform_device.h>
51d45d25	16	#include <linux/pm_runtime.h>
d2a73e22	17	#include <linux/reboot.h>
1e426ffd KM	18	#include <linux/slab.h>
	19	#include <linux/spinlock.h>
	20	#include <linux/thermal.h>
	21
64a411e8 KM	22	#include "thermal_hwmon.h"
64a411e8 KM	23
d2a73e22	24	#define IDLE_INTERVAL 5000
d2a73e22	25
e0a5172e KM	26	#define COMMON_STR 0x00
	27	#define COMMON_ENR 0x04
	28	#define COMMON_INTMSK 0x0c
	29
	30	#define REG_POSNEG 0x20
	31	#define REG_FILONOFF 0x28
e9137a58 KM	32	#define REG_THSCR 0x2c
e9137a58 KM	33	#define REG_THSSR 0x30
e0a5172e	34	#define REG_INTCTRL 0x34
1e426ffd KM	35
1e426ffd KM	36	/* THSCR */
f8f53e18	37	#define CPCTL (1 << 12)
1e426ffd KM	38
	39	/* THSSR */
	40	#define CTEMP 0x3f
	41
3676d1dd KM	42	struct rcar_thermal_common {
	43	void __iomem *base;
	44	struct device *dev;
	45	struct list_head head;
e0a5172e	46	spinlock_t lock;
3676d1dd	47	};
1e426ffd	48
1969d9dc YK	49	struct rcar_thermal_chip {
	50	unsigned int use_of_thermal : 1;
	51	unsigned int has_filonoff : 1;
	52	unsigned int irq_per_ch : 1;
	53	unsigned int needs_suspend_resume : 1;
	54	unsigned int nirqs;
20386f0d	55	unsigned int ctemp_bands;
1969d9dc YK	56	};
	57
	58	static const struct rcar_thermal_chip rcar_thermal = {
	59	.use_of_thermal = 0,
	60	.has_filonoff = 1,
	61	.irq_per_ch = 0,
	62	.needs_suspend_resume = 0,
	63	.nirqs = 1,
20386f0d	64	.ctemp_bands = 1,
1969d9dc YK	65	};
	66
	67	static const struct rcar_thermal_chip rcar_gen2_thermal = {
	68	.use_of_thermal = 1,
	69	.has_filonoff = 1,
	70	.irq_per_ch = 0,
	71	.needs_suspend_resume = 0,
	72	.nirqs = 1,
20386f0d	73	.ctemp_bands = 1,
1969d9dc YK	74	};
	75
	76	static const struct rcar_thermal_chip rcar_gen3_thermal = {
	77	.use_of_thermal = 1,
	78	.has_filonoff = 0,
	79	.irq_per_ch = 1,
	80	.needs_suspend_resume = 1,
	81	/*
	82	* The Gen3 chip has 3 interrupts, but this driver uses only 2
	83	* interrupts to detect a temperature change, rise or fall.
	84	*/
	85	.nirqs = 2,
20386f0d	86	.ctemp_bands = 2,
1969d9dc YK	87	};
1969d9dc YK	88
1e426ffd KM	89	struct rcar_thermal_priv {
1e426ffd KM	90	void __iomem *base;
3676d1dd KM	91	struct rcar_thermal_common *common;
3676d1dd KM	92	struct thermal_zone_device *zone;
1969d9dc	93	const struct rcar_thermal_chip *chip;
e0a5172e	94	struct delayed_work work;
b2bbc6a2	95	struct mutex lock;
3676d1dd	96	struct list_head list;
e0a5172e	97	int id;
1e426ffd KM	98	};
1e426ffd KM	99
3676d1dd KM	100	#define rcar_thermal_for_each_priv(pos, common) \
	101	list_for_each_entry(pos, &common->head, list)
	102
c499703e	103	#define MCELSIUS(temp) ((temp) * 1000)
9dde8f86	104	#define rcar_zone_to_priv(zone) ((zone)->devdata)
3676d1dd KM	105	#define rcar_priv_to_dev(priv) ((priv)->common->dev)
3676d1dd KM	106	#define rcar_has_irq_support(priv) ((priv)->common->base)
e0a5172e KM	107	#define rcar_id_to_shift(priv) ((priv)->id * 8)
e0a5172e KM	108
ca1e4558	109	static const struct of_device_id rcar_thermal_dt_ids[] = {
1969d9dc YK	110	{
	111	.compatible = "renesas,rcar-thermal",
	112	.data = &rcar_thermal,
	113	},
	114	{
	115	.compatible = "renesas,rcar-gen2-thermal",
	116	.data = &rcar_gen2_thermal,
	117	},
b8d3d112 FC	118	{
	119	.compatible = "renesas,thermal-r8a774c0",
	120	.data = &rcar_gen3_thermal,
	121	},
92ca366e SS	122	{
	123	.compatible = "renesas,thermal-r8a77970",
	124	.data = &rcar_gen3_thermal,
	125	},
e36e1300 YK	126	{
	127	.compatible = "renesas,thermal-r8a77990",
	128	.data = &rcar_gen3_thermal,
	129	},
1969d9dc YK	130	{
	131	.compatible = "renesas,thermal-r8a77995",
	132	.data = &rcar_gen3_thermal,
	133	},
ca1e4558 KM	134	{},
	135	};
	136	MODULE_DEVICE_TABLE(of, rcar_thermal_dt_ids);
	137
1e426ffd KM	138	/*
	139	* basic functions
	140	*/
e9137a58 KM	141	#define rcar_thermal_common_read(c, r) \
	142	_rcar_thermal_common_read(c, COMMON_ ##r)
	143	static u32 _rcar_thermal_common_read(struct rcar_thermal_common *common,
	144	u32 reg)
	145	{
	146	return ioread32(common->base + reg);
	147	}
	148
	149	#define rcar_thermal_common_write(c, r, d) \
	150	_rcar_thermal_common_write(c, COMMON_ ##r, d)
	151	static void _rcar_thermal_common_write(struct rcar_thermal_common *common,
	152	u32 reg, u32 data)
	153	{
	154	iowrite32(data, common->base + reg);
	155	}
	156
	157	#define rcar_thermal_common_bset(c, r, m, d) \
	158	_rcar_thermal_common_bset(c, COMMON_ ##r, m, d)
	159	static void _rcar_thermal_common_bset(struct rcar_thermal_common *common,
	160	u32 reg, u32 mask, u32 data)
	161	{
	162	u32 val;
	163
	164	val = ioread32(common->base + reg);
	165	val &= ~mask;
	166	val \|= (data & mask);
	167	iowrite32(val, common->base + reg);
	168	}
e9137a58 KM	169
	170	#define rcar_thermal_read(p, r) _rcar_thermal_read(p, REG_ ##r)
	171	static u32 _rcar_thermal_read(struct rcar_thermal_priv *priv, u32 reg)
1e426ffd	172	{
b2bbc6a2	173	return ioread32(priv->base + reg);
1e426ffd KM	174	}
1e426ffd KM	175
e9137a58 KM	176	#define rcar_thermal_write(p, r, d) _rcar_thermal_write(p, REG_ ##r, d)
	177	static void _rcar_thermal_write(struct rcar_thermal_priv *priv,
	178	u32 reg, u32 data)
1e426ffd	179	{
1e426ffd	180	iowrite32(data, priv->base + reg);
1e426ffd	181	}
1e426ffd	182
e9137a58 KM	183	#define rcar_thermal_bset(p, r, m, d) _rcar_thermal_bset(p, REG_ ##r, m, d)
	184	static void _rcar_thermal_bset(struct rcar_thermal_priv *priv, u32 reg,
	185	u32 mask, u32 data)
1e426ffd	186	{
1e426ffd KM	187	u32 val;
1e426ffd KM	188
1e426ffd KM	189	val = ioread32(priv->base + reg);
	190	val &= ~mask;
	191	val \|= (data & mask);
	192	iowrite32(val, priv->base + reg);
1e426ffd KM	193	}
	194
	195	/*
	196	* zone device functions
	197	*/
e0a5172e	198	static int rcar_thermal_update_temp(struct rcar_thermal_priv *priv)
1e426ffd	199	{
f8f53e18	200	struct device *dev = rcar_priv_to_dev(priv);
b03628b7 NS	201	int old, new, ctemp = -EINVAL;
b03628b7 NS	202	unsigned int i;
f8f53e18	203
b2bbc6a2 KM	204	mutex_lock(&priv->lock);
b2bbc6a2 KM	205
f8f53e18 KM	206	/*
	207	* TSC decides a value of CPTAP automatically,
	208	* and this is the conditions which validate interrupt.
	209	*/
	210	rcar_thermal_bset(priv, THSCR, CPCTL, CPCTL);
	211
f8f53e18 KM	212	old = ~0;
f8f53e18 KM	213	for (i = 0; i < 128; i++) {
1e426ffd KM	214	/*
	215	* we need to wait 300us after changing comparator offset
	216	* to get stable temperature.
	217	* see "Usage Notes" on datasheet
	218	*/
263c8c4c	219	usleep_range(300, 400);
1e426ffd	220
f8f53e18 KM	221	new = rcar_thermal_read(priv, THSSR) & CTEMP;
	222	if (new == old) {
	223	ctemp = new;
1e426ffd KM	224	break;
1e426ffd KM	225	}
f8f53e18	226	old = new;
1e426ffd KM	227	}
1e426ffd KM	228
b03628b7	229	if (ctemp < 0) {
f8f53e18	230	dev_err(dev, "thermal sensor was broken\n");
f0e68fc3	231	goto err_out_unlock;
f8f53e18 KM	232	}
f8f53e18 KM	233
e0a5172e KM	234	/*
	235	* enable IRQ
	236	*/
	237	if (rcar_has_irq_support(priv)) {
1969d9dc YK	238	if (priv->chip->has_filonoff)
1969d9dc YK	239	rcar_thermal_write(priv, FILONOFF, 0);
e0a5172e KM	240
	241	/* enable Rising/Falling edge interrupt */
	242	rcar_thermal_write(priv, POSNEG, 0x1);
	243	rcar_thermal_write(priv, INTCTRL, (((ctemp - 0) << 8) \|
	244	((ctemp - 1) << 0)));
	245	}
	246
f0e68fc3	247	err_out_unlock:
b2bbc6a2	248	mutex_unlock(&priv->lock);
57ed737f	249
b03628b7	250	return ctemp;
1e426ffd KM	251	}
1e426ffd KM	252
8b477ea5 KM	253	static int rcar_thermal_get_current_temp(struct rcar_thermal_priv *priv,
8b477ea5 KM	254	int *temp)
e0a5172e	255	{
0fa04202	256	int ctemp;
e0a5172e	257
57ed737f NS	258	ctemp = rcar_thermal_update_temp(priv);
	259	if (ctemp < 0)
	260	return ctemp;
e0a5172e	261
0fa04202 NS	262	/* Guaranteed operating range is -45C to 125C. */
0fa04202 NS	263
20386f0d	264	if (priv->chip->ctemp_bands == 1)
0fa04202	265	temp = MCELSIUS((ctemp 5) - 65);
57ed737f	266	else if (ctemp < 24)
0fa04202	267	temp = MCELSIUS(((ctemp 55) - 720) / 10);
20386f0d	268	else
0fa04202	269	temp = MCELSIUS((ctemp 5) - 60);
5440c40b	270
e0a5172e KM	271	return 0;
	272	}
	273
8b477ea5 KM	274	static int rcar_thermal_of_get_temp(void data, int temp)
	275	{
	276	struct rcar_thermal_priv *priv = data;
	277
	278	return rcar_thermal_get_current_temp(priv, temp);
	279	}
	280
	281	static int rcar_thermal_get_temp(struct thermal_zone_device zone, int temp)
	282	{
	283	struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone);
	284
	285	return rcar_thermal_get_current_temp(priv, temp);
	286	}
	287
d2a73e22	288	static int rcar_thermal_get_trip_type(struct thermal_zone_device *zone,
	289	int trip, enum thermal_trip_type *type)
	290	{
	291	struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone);
3676d1dd	292	struct device *dev = rcar_priv_to_dev(priv);
d2a73e22	293
	294	/* see rcar_thermal_get_temp() */
	295	switch (trip) {
	296	case 0: /* +90 <= temp */
	297	*type = THERMAL_TRIP_CRITICAL;
	298	break;
	299	default:
3676d1dd	300	dev_err(dev, "rcar driver trip error\n");
d2a73e22	301	return -EINVAL;
	302	}
	303
	304	return 0;
	305	}
	306
	307	static int rcar_thermal_get_trip_temp(struct thermal_zone_device *zone,
17e8351a	308	int trip, int *temp)
d2a73e22	309	{
d2a73e22	310	struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone);
3676d1dd	311	struct device *dev = rcar_priv_to_dev(priv);
d2a73e22	312
	313	/* see rcar_thermal_get_temp() */
	314	switch (trip) {
	315	case 0: /* +90 <= temp */
	316	*temp = MCELSIUS(90);
	317	break;
	318	default:
3676d1dd	319	dev_err(dev, "rcar driver trip error\n");
d2a73e22	320	return -EINVAL;
	321	}
	322
	323	return 0;
	324	}
	325
8b477ea5 KM	326	static const struct thermal_zone_of_device_ops rcar_thermal_zone_of_ops = {
	327	.get_temp = rcar_thermal_of_get_temp,
	328	};
	329
1e426ffd	330	static struct thermal_zone_device_ops rcar_thermal_zone_ops = {
d2a73e22	331	.get_temp = rcar_thermal_get_temp,
	332	.get_trip_type = rcar_thermal_get_trip_type,
	333	.get_trip_temp = rcar_thermal_get_trip_temp,
1e426ffd KM	334	};
1e426ffd KM	335
e0a5172e KM	336	/*
	337	* interrupt
	338	*/
	339	#define rcar_thermal_irq_enable(p) _rcar_thermal_irq_ctrl(p, 1)
	340	#define rcar_thermal_irq_disable(p) _rcar_thermal_irq_ctrl(p, 0)
	341	static void _rcar_thermal_irq_ctrl(struct rcar_thermal_priv *priv, int enable)
	342	{
	343	struct rcar_thermal_common *common = priv->common;
	344	unsigned long flags;
	345	u32 mask = 0x3 << rcar_id_to_shift(priv); /* enable Rising/Falling */
	346
ffbcdf8a KM	347	if (!rcar_has_irq_support(priv))
	348	return;
	349
e0a5172e KM	350	spin_lock_irqsave(&common->lock, flags);
	351
	352	rcar_thermal_common_bset(common, INTMSK, mask, enable ? 0 : mask);
	353
	354	spin_unlock_irqrestore(&common->lock, flags);
	355	}
	356
	357	static void rcar_thermal_work(struct work_struct *work)
	358	{
	359	struct rcar_thermal_priv *priv;
a1ade565	360	int ret;
e0a5172e KM	361
	362	priv = container_of(work, struct rcar_thermal_priv, work.work);
	363
a1ade565 KM	364	ret = rcar_thermal_update_temp(priv);
	365	if (ret < 0)
	366	return;
	367
e0a5172e	368	rcar_thermal_irq_enable(priv);
9477165e	369
7617e771	370	thermal_zone_device_update(priv->zone, THERMAL_EVENT_UNSPECIFIED);
e0a5172e KM	371	}
	372
	373	static u32 rcar_thermal_had_changed(struct rcar_thermal_priv *priv, u32 status)
	374	{
	375	struct device *dev = rcar_priv_to_dev(priv);
	376
	377	status = (status >> rcar_id_to_shift(priv)) & 0x3;
	378
206c0cba	379	if (status) {
e0a5172e KM	380	dev_dbg(dev, "thermal%d %s%s\n",
	381	priv->id,
	382	(status & 0x2) ? "Rising " : "",
	383	(status & 0x1) ? "Falling" : "");
	384	}
	385
	386	return status;
	387	}
	388
	389	static irqreturn_t rcar_thermal_irq(int irq, void *data)
	390	{
	391	struct rcar_thermal_common *common = data;
	392	struct rcar_thermal_priv *priv;
e0a5172e KM	393	u32 status, mask;
e0a5172e KM	394
4eb7d0cd	395	spin_lock(&common->lock);
e0a5172e KM	396
	397	mask = rcar_thermal_common_read(common, INTMSK);
	398	status = rcar_thermal_common_read(common, STR);
	399	rcar_thermal_common_write(common, STR, 0x000F0F0F & mask);
	400
4eb7d0cd	401	spin_unlock(&common->lock);
e0a5172e KM	402
	403	status = status & ~mask;
	404
	405	/*
	406	* check the status
	407	*/
	408	rcar_thermal_for_each_priv(priv, common) {
	409	if (rcar_thermal_had_changed(priv, status)) {
	410	rcar_thermal_irq_disable(priv);
3a313862 GU	411	queue_delayed_work(system_freezable_wq, &priv->work,
3a313862 GU	412	msecs_to_jiffies(300));
e0a5172e KM	413	}
	414	}
	415
	416	return IRQ_HANDLED;
	417	}
	418
1e426ffd KM	419	/*
	420	* platform functions
	421	*/
84f0e490 KM	422	static int rcar_thermal_remove(struct platform_device *pdev)
	423	{
	424	struct rcar_thermal_common *common = platform_get_drvdata(pdev);
	425	struct device *dev = &pdev->dev;
	426	struct rcar_thermal_priv *priv;
	427
	428	rcar_thermal_for_each_priv(priv, common) {
ffbcdf8a	429	rcar_thermal_irq_disable(priv);
697ee786	430	cancel_delayed_work_sync(&priv->work);
1969d9dc	431	if (priv->chip->use_of_thermal)
64a411e8	432	thermal_remove_hwmon_sysfs(priv->zone);
d4b23c5c BDP	433	else
d4b23c5c BDP	434	thermal_zone_device_unregister(priv->zone);
84f0e490 KM	435	}
	436
	437	pm_runtime_put(dev);
	438	pm_runtime_disable(dev);
	439
	440	return 0;
	441	}
	442
1e426ffd KM	443	static int rcar_thermal_probe(struct platform_device *pdev)
1e426ffd KM	444	{
3676d1dd	445	struct rcar_thermal_common *common;
1e426ffd	446	struct rcar_thermal_priv *priv;
3676d1dd KM	447	struct device *dev = &pdev->dev;
3676d1dd KM	448	struct resource res, irq;
1969d9dc	449	const struct rcar_thermal_chip *chip = of_device_get_match_data(dev);
3676d1dd KM	450	int mres = 0;
3676d1dd KM	451	int i;
fb84d990	452	int ret = -ENODEV;
e0a5172e	453	int idle = IDLE_INTERVAL;
11313746	454	u32 enr_bits = 0;
1e426ffd	455
3676d1dd	456	common = devm_kzalloc(dev, sizeof(*common), GFP_KERNEL);
b0a60d88	457	if (!common)
1e426ffd	458	return -ENOMEM;
1e426ffd	459
84f0e490 KM	460	platform_set_drvdata(pdev, common);
84f0e490 KM	461
3676d1dd	462	INIT_LIST_HEAD(&common->head);
e0a5172e	463	spin_lock_init(&common->lock);
3676d1dd KM	464	common->dev = dev;
3676d1dd KM	465
51d45d25 KM	466	pm_runtime_enable(dev);
	467	pm_runtime_get_sync(dev);
	468
1969d9dc	469	for (i = 0; i < chip->nirqs; i++) {
df016bbb	470	irq = platform_get_resource(pdev, IORESOURCE_IRQ, i);
1969d9dc YK	471	if (!irq)
	472	continue;
	473	if (!common->base) {
	474	/*
	475	* platform has IRQ support.
	476	* Then, driver uses common registers
	477	* rcar_has_irq_support() will be enabled
	478	*/
	479	res = platform_get_resource(pdev, IORESOURCE_MEM,
	480	mres++);
	481	common->base = devm_ioremap_resource(dev, res);
39056e8a NS	482	if (IS_ERR(common->base)) {
	483	ret = PTR_ERR(common->base);
	484	goto error_unregister;
	485	}
1969d9dc YK	486
	487	idle = 0; /* polling delay is not needed */
	488	}
e0a5172e	489
1969d9dc YK	490	ret = devm_request_irq(dev, irq->start, rcar_thermal_irq,
	491	IRQF_SHARED, dev_name(dev), common);
	492	if (ret) {
	493	dev_err(dev, "irq request failed\n ");
	494	goto error_unregister;
	495	}
	496
	497	/* update ENR bits */
	498	if (chip->irq_per_ch)
	499	enr_bits \|= 1 << i;
1e426ffd KM	500	}
1e426ffd KM	501
3676d1dd KM	502	for (i = 0;; i++) {
	503	res = platform_get_resource(pdev, IORESOURCE_MEM, mres++);
	504	if (!res)
	505	break;
	506
	507	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	508	if (!priv) {
1dc20828 KM	509	ret = -ENOMEM;
1dc20828 KM	510	goto error_unregister;
3676d1dd KM	511	}
3676d1dd KM	512
5095526f	513	priv->base = devm_ioremap_resource(dev, res);
1dc20828 KM	514	if (IS_ERR(priv->base)) {
	515	ret = PTR_ERR(priv->base);
	516	goto error_unregister;
	517	}
3676d1dd KM	518
3676d1dd KM	519	priv->common = common;
e0a5172e	520	priv->id = i;
1969d9dc	521	priv->chip = chip;
3676d1dd KM	522	mutex_init(&priv->lock);
3676d1dd KM	523	INIT_LIST_HEAD(&priv->list);
e0a5172e	524	INIT_DELAYED_WORK(&priv->work, rcar_thermal_work);
a1ade565 KM	525	ret = rcar_thermal_update_temp(priv);
	526	if (ret < 0)
	527	goto error_unregister;
3676d1dd	528
392573b7	529	if (chip->use_of_thermal) {
5e325868	530	priv->zone = devm_thermal_zone_of_sensor_register(
8b477ea5 KM	531	dev, i, priv,
8b477ea5 KM	532	&rcar_thermal_zone_of_ops);
392573b7	533	} else {
8b477ea5 KM	534	priv->zone = thermal_zone_device_register(
8b477ea5 KM	535	"rcar_thermal",
3676d1dd KM	536	1, 0, priv,
3676d1dd KM	537	&rcar_thermal_zone_ops, NULL, 0,
e0a5172e	538	idle);
bbcf90c0 AP	539
	540	ret = thermal_zone_device_enable(priv->zone);
	541	if (ret) {
	542	thermal_zone_device_unregister(priv->zone);
	543	priv->zone = ERR_PTR(ret);
	544	}
	545	}
3676d1dd KM	546	if (IS_ERR(priv->zone)) {
3676d1dd KM	547	dev_err(dev, "can't register thermal zone\n");
fb84d990	548	ret = PTR_ERR(priv->zone);
87260d3f	549	priv->zone = NULL;
3676d1dd KM	550	goto error_unregister;
	551	}
	552
1969d9dc	553	if (chip->use_of_thermal) {
64a411e8 KM	554	/*
	555	* thermal_zone doesn't enable hwmon as default,
	556	* but, enable it here to keep compatible
	557	*/
	558	priv->zone->tzp->no_hwmon = false;
	559	ret = thermal_add_hwmon_sysfs(priv->zone);
	560	if (ret)
	561	goto error_unregister;
	562	}
	563
ffbcdf8a	564	rcar_thermal_irq_enable(priv);
1dc20828 KM	565
1dc20828 KM	566	list_move_tail(&priv->list, &common->head);
11313746 YS	567
11313746 YS	568	/* update ENR bits */
1969d9dc YK	569	if (!chip->irq_per_ch)
1969d9dc YK	570	enr_bits \|= 3 << (i * 8);
1e426ffd KM	571	}
1e426ffd KM	572
542cdf40	573	if (common->base && enr_bits)
11313746 YS	574	rcar_thermal_common_write(common, ENR, enr_bits);
11313746 YS	575
3db46c93	576	dev_info(dev, "%d sensor probed\n", i);
1e426ffd KM	577
1e426ffd KM	578	return 0;
3676d1dd KM	579
3676d1dd KM	580	error_unregister:
84f0e490	581	rcar_thermal_remove(pdev);
51d45d25	582
fb84d990	583	return ret;
1e426ffd KM	584	}
1e426ffd KM	585
1969d9dc YK	586	#ifdef CONFIG_PM_SLEEP
	587	static int rcar_thermal_suspend(struct device *dev)
	588	{
	589	struct rcar_thermal_common *common = dev_get_drvdata(dev);
	590	struct rcar_thermal_priv *priv = list_first_entry(&common->head,
	591	typeof(*priv), list);
	592
	593	if (priv->chip->needs_suspend_resume) {
	594	rcar_thermal_common_write(common, ENR, 0);
	595	rcar_thermal_irq_disable(priv);
	596	rcar_thermal_bset(priv, THSCR, CPCTL, 0);
	597	}
	598
	599	return 0;
	600	}
	601
	602	static int rcar_thermal_resume(struct device *dev)
	603	{
	604	struct rcar_thermal_common *common = dev_get_drvdata(dev);
	605	struct rcar_thermal_priv *priv = list_first_entry(&common->head,
	606	typeof(*priv), list);
	607	int ret;
	608
	609	if (priv->chip->needs_suspend_resume) {
	610	ret = rcar_thermal_update_temp(priv);
	611	if (ret < 0)
	612	return ret;
	613	rcar_thermal_irq_enable(priv);
	614	rcar_thermal_common_write(common, ENR, 0x03);
	615	}
	616
	617	return 0;
	618	}
	619	#endif
	620
	621	static SIMPLE_DEV_PM_OPS(rcar_thermal_pm_ops, rcar_thermal_suspend,
	622	rcar_thermal_resume);
	623
1e426ffd KM	624	static struct platform_driver rcar_thermal_driver = {
	625	.driver = {
	626	.name = "rcar_thermal",
1969d9dc	627	.pm = &rcar_thermal_pm_ops,
76cc1887	628	.of_match_table = rcar_thermal_dt_ids,
1e426ffd KM	629	},
	630	.probe = rcar_thermal_probe,
	631	.remove = rcar_thermal_remove,
	632	};
	633	module_platform_driver(rcar_thermal_driver);
	634
c9545790	635	MODULE_LICENSE("GPL v2");
1e426ffd KM	636	MODULE_DESCRIPTION("R-Car THS/TSC thermal sensor driver");
1e426ffd KM	637	MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");