[deliverable/linux.git] / drivers / thermal / rcar_thermal.c

/*
 *  R-Car THS/TSC thermal sensor driver
 *
 * Copyright (C) 2012 Renesas Solutions Corp.
 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 *
 *  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; version 2 of the License.
 *
 *  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/delay.h>
#include <linux/err.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/reboot.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/thermal.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_priv {
	void __iomem *base;
	struct rcar_thermal_common *common;
	struct thermal_zone_device *zone;
	struct delayed_work work;
	struct mutex lock;
	struct list_head list;
	int id;
	int ctemp;
};

#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)

#ifdef DEBUG
# define rcar_force_update_temp(priv)	1
#else
# define rcar_force_update_temp(priv)	0
#endif

/*
 *		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 i;
	int ctemp, old, new;
	int ret = -EINVAL;

	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);

	ctemp = 0;
	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
		 */
		udelay(300);

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

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

	/*
	 * enable IRQ
	 */
	if (rcar_has_irq_support(priv)) {
		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)));
	}

	dev_dbg(dev, "thermal%d  %d -> %d\n", priv->id, priv->ctemp, ctemp);

	priv->ctemp = ctemp;
	ret = 0;
err_out_unlock:
	mutex_unlock(&priv->lock);
	return ret;
}

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

	if (!rcar_has_irq_support(priv) || rcar_force_update_temp(priv))
		rcar_thermal_update_temp(priv);

	mutex_lock(&priv->lock);
	*temp =  MCELSIUS((priv->ctemp * 5) - 65);
	mutex_unlock(&priv->lock);

	return 0;
}

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, unsigned long *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 int rcar_thermal_notify(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);

	switch (type) {
	case THERMAL_TRIP_CRITICAL:
		/* FIXME */
		dev_warn(dev, "Thermal reached to critical temperature\n");
		break;
	default:
		break;
	}

	return 0;
}

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,
	.notify		= rcar_thermal_notify,
};

/*
 *		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 */

	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;

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

	rcar_thermal_update_temp(priv);
	rcar_thermal_irq_enable(priv);
	thermal_zone_device_update(priv->zone);
}

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 & 0x3) {
		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;
	unsigned long flags;
	u32 status, mask;

	spin_lock_irqsave(&common->lock, flags);

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

	spin_unlock_irqrestore(&common->lock, flags);

	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);
			schedule_delayed_work(&priv->work,
					      msecs_to_jiffies(300));
		}
	}

	return IRQ_HANDLED;
}

/*
 *		platform functions
 */
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;
	int mres = 0;
	int i;
	int idle = IDLE_INTERVAL;

	common = devm_kzalloc(dev, sizeof(*common), GFP_KERNEL);
	if (!common) {
		dev_err(dev, "Could not allocate common\n");
		return -ENOMEM;
	}

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

	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (irq) {
		int ret;

		/*
		 * platform has IRQ support.
		 * Then, drier use common register
		 */
		res = platform_get_resource(pdev, IORESOURCE_MEM, mres++);
		if (!res) {
			dev_err(dev, "Could not get platform resource\n");
			return -ENODEV;
		}

		ret = devm_request_irq(dev, irq->start, rcar_thermal_irq, 0,
				       dev_name(dev), common);
		if (ret) {
			dev_err(dev, "irq request failed\n ");
			return ret;
		}

		/*
		 * rcar_has_irq_support() will be enabled
		 */
		common->base = devm_request_and_ioremap(dev, res);
		if (!common->base) {
			dev_err(dev, "Unable to ioremap thermal register\n");
			return -ENOMEM;
		}

		/* enable temperature comparation */
		rcar_thermal_common_write(common, ENR, 0x00030303);

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

	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) {
			dev_err(dev, "Could not allocate priv\n");
			return -ENOMEM;
		}

		priv->base = devm_request_and_ioremap(dev, res);
		if (!priv->base) {
			dev_err(dev, "Unable to ioremap priv register\n");
			return -ENOMEM;
		}

		priv->common = common;
		priv->id = i;
		mutex_init(&priv->lock);
		INIT_LIST_HEAD(&priv->list);
		INIT_DELAYED_WORK(&priv->work, rcar_thermal_work);
		rcar_thermal_update_temp(priv);

		priv->zone = thermal_zone_device_register("rcar_thermal",
						1, 0, priv,
						&rcar_thermal_zone_ops, NULL, 0,
						idle);
		if (IS_ERR(priv->zone)) {
			dev_err(dev, "can't register thermal zone\n");
			goto error_unregister;
		}

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

		if (rcar_has_irq_support(priv))
			rcar_thermal_irq_enable(priv);
	}

	platform_set_drvdata(pdev, common);

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

	return 0;

error_unregister:
	rcar_thermal_for_each_priv(priv, common)
		thermal_zone_device_unregister(priv->zone);

	return -ENODEV;
}

static int rcar_thermal_remove(struct platform_device *pdev)
{
	struct rcar_thermal_common *common = platform_get_drvdata(pdev);
	struct rcar_thermal_priv *priv;

	rcar_thermal_for_each_priv(priv, common)
		thermal_zone_device_unregister(priv->zone);

	platform_set_drvdata(pdev, NULL);

	return 0;
}

static const struct of_device_id rcar_thermal_dt_ids[] = {
	{ .compatible = "renesas,rcar-thermal", },
	{},
};
MODULE_DEVICE_TABLE(of, rcar_thermal_dt_ids);

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

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("R-Car THS/TSC thermal sensor driver");
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
Commit	Line	Data
1e426ffd KM	1	/*
	2	* R-Car THS/TSC thermal sensor driver
	3	*
	4	* Copyright (C) 2012 Renesas Solutions Corp.
	5	* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; version 2 of the License.
	10	*
	11	* This program is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License along
	17	* with this program; if not, write to the Free Software Foundation, Inc.,
	18	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	19	*/
	20	#include <linux/delay.h>
	21	#include <linux/err.h>
e0a5172e KM	22	#include <linux/irq.h>
e0a5172e KM	23	#include <linux/interrupt.h>
1e426ffd KM	24	#include <linux/io.h>
	25	#include <linux/module.h>
	26	#include <linux/platform_device.h>
d2a73e22	27	#include <linux/reboot.h>
1e426ffd KM	28	#include <linux/slab.h>
	29	#include <linux/spinlock.h>
	30	#include <linux/thermal.h>
	31
d2a73e22	32	#define IDLE_INTERVAL 5000
d2a73e22	33
e0a5172e KM	34	#define COMMON_STR 0x00
	35	#define COMMON_ENR 0x04
	36	#define COMMON_INTMSK 0x0c
	37
	38	#define REG_POSNEG 0x20
	39	#define REG_FILONOFF 0x28
e9137a58 KM	40	#define REG_THSCR 0x2c
e9137a58 KM	41	#define REG_THSSR 0x30
e0a5172e	42	#define REG_INTCTRL 0x34
1e426ffd KM	43
1e426ffd KM	44	/* THSCR */
f8f53e18	45	#define CPCTL (1 << 12)
1e426ffd KM	46
	47	/* THSSR */
	48	#define CTEMP 0x3f
	49
3676d1dd KM	50	struct rcar_thermal_common {
	51	void __iomem *base;
	52	struct device *dev;
	53	struct list_head head;
e0a5172e	54	spinlock_t lock;
3676d1dd	55	};
1e426ffd KM	56
	57	struct rcar_thermal_priv {
	58	void __iomem *base;
3676d1dd KM	59	struct rcar_thermal_common *common;
3676d1dd KM	60	struct thermal_zone_device *zone;
e0a5172e	61	struct delayed_work work;
b2bbc6a2	62	struct mutex lock;
3676d1dd	63	struct list_head list;
e0a5172e KM	64	int id;
e0a5172e KM	65	int ctemp;
1e426ffd KM	66	};
1e426ffd KM	67
3676d1dd KM	68	#define rcar_thermal_for_each_priv(pos, common) \
	69	list_for_each_entry(pos, &common->head, list)
	70
c499703e	71	#define MCELSIUS(temp) ((temp) * 1000)
9dde8f86	72	#define rcar_zone_to_priv(zone) ((zone)->devdata)
3676d1dd KM	73	#define rcar_priv_to_dev(priv) ((priv)->common->dev)
3676d1dd KM	74	#define rcar_has_irq_support(priv) ((priv)->common->base)
e0a5172e KM	75	#define rcar_id_to_shift(priv) ((priv)->id * 8)
	76
	77	#ifdef DEBUG
	78	# define rcar_force_update_temp(priv) 1
	79	#else
	80	# define rcar_force_update_temp(priv) 0
	81	#endif
c499703e	82
1e426ffd KM	83	/*
	84	* basic functions
	85	*/
e9137a58 KM	86	#define rcar_thermal_common_read(c, r) \
	87	_rcar_thermal_common_read(c, COMMON_ ##r)
	88	static u32 _rcar_thermal_common_read(struct rcar_thermal_common *common,
	89	u32 reg)
	90	{
	91	return ioread32(common->base + reg);
	92	}
	93
	94	#define rcar_thermal_common_write(c, r, d) \
	95	_rcar_thermal_common_write(c, COMMON_ ##r, d)
	96	static void _rcar_thermal_common_write(struct rcar_thermal_common *common,
	97	u32 reg, u32 data)
	98	{
	99	iowrite32(data, common->base + reg);
	100	}
	101
	102	#define rcar_thermal_common_bset(c, r, m, d) \
	103	_rcar_thermal_common_bset(c, COMMON_ ##r, m, d)
	104	static void _rcar_thermal_common_bset(struct rcar_thermal_common *common,
	105	u32 reg, u32 mask, u32 data)
	106	{
	107	u32 val;
	108
	109	val = ioread32(common->base + reg);
	110	val &= ~mask;
	111	val \|= (data & mask);
	112	iowrite32(val, common->base + reg);
	113	}
e9137a58 KM	114
	115	#define rcar_thermal_read(p, r) _rcar_thermal_read(p, REG_ ##r)
	116	static u32 _rcar_thermal_read(struct rcar_thermal_priv *priv, u32 reg)
1e426ffd	117	{
b2bbc6a2	118	return ioread32(priv->base + reg);
1e426ffd KM	119	}
1e426ffd KM	120
e9137a58 KM	121	#define rcar_thermal_write(p, r, d) _rcar_thermal_write(p, REG_ ##r, d)
	122	static void _rcar_thermal_write(struct rcar_thermal_priv *priv,
	123	u32 reg, u32 data)
1e426ffd	124	{
1e426ffd	125	iowrite32(data, priv->base + reg);
1e426ffd	126	}
1e426ffd	127
e9137a58 KM	128	#define rcar_thermal_bset(p, r, m, d) _rcar_thermal_bset(p, REG_ ##r, m, d)
	129	static void _rcar_thermal_bset(struct rcar_thermal_priv *priv, u32 reg,
	130	u32 mask, u32 data)
1e426ffd	131	{
1e426ffd KM	132	u32 val;
1e426ffd KM	133
1e426ffd KM	134	val = ioread32(priv->base + reg);
	135	val &= ~mask;
	136	val \|= (data & mask);
	137	iowrite32(val, priv->base + reg);
1e426ffd KM	138	}
	139
	140	/*
	141	* zone device functions
	142	*/
e0a5172e	143	static int rcar_thermal_update_temp(struct rcar_thermal_priv *priv)
1e426ffd	144	{
f8f53e18 KM	145	struct device *dev = rcar_priv_to_dev(priv);
	146	int i;
	147	int ctemp, old, new;
f0e68fc3	148	int ret = -EINVAL;
f8f53e18	149
b2bbc6a2 KM	150	mutex_lock(&priv->lock);
b2bbc6a2 KM	151
f8f53e18 KM	152	/*
	153	* TSC decides a value of CPTAP automatically,
	154	* and this is the conditions which validate interrupt.
	155	*/
	156	rcar_thermal_bset(priv, THSCR, CPCTL, CPCTL);
	157
	158	ctemp = 0;
	159	old = ~0;
	160	for (i = 0; i < 128; i++) {
1e426ffd KM	161	/*
	162	* we need to wait 300us after changing comparator offset
	163	* to get stable temperature.
	164	* see "Usage Notes" on datasheet
	165	*/
1e426ffd KM	166	udelay(300);
1e426ffd KM	167
f8f53e18 KM	168	new = rcar_thermal_read(priv, THSSR) & CTEMP;
	169	if (new == old) {
	170	ctemp = new;
1e426ffd KM	171	break;
1e426ffd KM	172	}
f8f53e18	173	old = new;
1e426ffd KM	174	}
1e426ffd KM	175
f8f53e18 KM	176	if (!ctemp) {
f8f53e18 KM	177	dev_err(dev, "thermal sensor was broken\n");
f0e68fc3	178	goto err_out_unlock;
f8f53e18 KM	179	}
f8f53e18 KM	180
e0a5172e KM	181	/*
	182	* enable IRQ
	183	*/
	184	if (rcar_has_irq_support(priv)) {
	185	rcar_thermal_write(priv, FILONOFF, 0);
	186
	187	/* enable Rising/Falling edge interrupt */
	188	rcar_thermal_write(priv, POSNEG, 0x1);
	189	rcar_thermal_write(priv, INTCTRL, (((ctemp - 0) << 8) \|
	190	((ctemp - 1) << 0)));
	191	}
	192
	193	dev_dbg(dev, "thermal%d %d -> %d\n", priv->id, priv->ctemp, ctemp);
	194
	195	priv->ctemp = ctemp;
f0e68fc3 WY	196	ret = 0;
f0e68fc3 WY	197	err_out_unlock:
b2bbc6a2	198	mutex_unlock(&priv->lock);
f0e68fc3	199	return ret;
1e426ffd KM	200	}
1e426ffd KM	201
e0a5172e KM	202	static int rcar_thermal_get_temp(struct thermal_zone_device *zone,
	203	unsigned long *temp)
	204	{
	205	struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone);
	206
	207	if (!rcar_has_irq_support(priv) \|\| rcar_force_update_temp(priv))
	208	rcar_thermal_update_temp(priv);
	209
	210	mutex_lock(&priv->lock);
	211	temp = MCELSIUS((priv->ctemp 5) - 65);
	212	mutex_unlock(&priv->lock);
	213
	214	return 0;
	215	}
	216
d2a73e22	217	static int rcar_thermal_get_trip_type(struct thermal_zone_device *zone,
	218	int trip, enum thermal_trip_type *type)
	219	{
	220	struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone);
3676d1dd	221	struct device *dev = rcar_priv_to_dev(priv);
d2a73e22	222
	223	/* see rcar_thermal_get_temp() */
	224	switch (trip) {
	225	case 0: /* +90 <= temp */
	226	*type = THERMAL_TRIP_CRITICAL;
	227	break;
	228	default:
3676d1dd	229	dev_err(dev, "rcar driver trip error\n");
d2a73e22	230	return -EINVAL;
	231	}
	232
	233	return 0;
	234	}
	235
	236	static int rcar_thermal_get_trip_temp(struct thermal_zone_device *zone,
	237	int trip, unsigned long *temp)
	238	{
	239	struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone);
3676d1dd	240	struct device *dev = rcar_priv_to_dev(priv);
d2a73e22	241
	242	/* see rcar_thermal_get_temp() */
	243	switch (trip) {
	244	case 0: /* +90 <= temp */
	245	*temp = MCELSIUS(90);
	246	break;
	247	default:
3676d1dd	248	dev_err(dev, "rcar driver trip error\n");
d2a73e22	249	return -EINVAL;
	250	}
	251
	252	return 0;
	253	}
	254
	255	static int rcar_thermal_notify(struct thermal_zone_device *zone,
	256	int trip, enum thermal_trip_type type)
	257	{
	258	struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone);
3676d1dd	259	struct device *dev = rcar_priv_to_dev(priv);
d2a73e22	260
	261	switch (type) {
	262	case THERMAL_TRIP_CRITICAL:
	263	/* FIXME */
3676d1dd	264	dev_warn(dev, "Thermal reached to critical temperature\n");
d2a73e22	265	break;
	266	default:
	267	break;
	268	}
	269
	270	return 0;
	271	}
	272
1e426ffd	273	static struct thermal_zone_device_ops rcar_thermal_zone_ops = {
d2a73e22	274	.get_temp = rcar_thermal_get_temp,
	275	.get_trip_type = rcar_thermal_get_trip_type,
	276	.get_trip_temp = rcar_thermal_get_trip_temp,
	277	.notify = rcar_thermal_notify,
1e426ffd KM	278	};
1e426ffd KM	279
e0a5172e KM	280	/*
	281	* interrupt
	282	*/
	283	#define rcar_thermal_irq_enable(p) _rcar_thermal_irq_ctrl(p, 1)
	284	#define rcar_thermal_irq_disable(p) _rcar_thermal_irq_ctrl(p, 0)
	285	static void _rcar_thermal_irq_ctrl(struct rcar_thermal_priv *priv, int enable)
	286	{
	287	struct rcar_thermal_common *common = priv->common;
	288	unsigned long flags;
	289	u32 mask = 0x3 << rcar_id_to_shift(priv); /* enable Rising/Falling */
	290
	291	spin_lock_irqsave(&common->lock, flags);
	292
	293	rcar_thermal_common_bset(common, INTMSK, mask, enable ? 0 : mask);
	294
	295	spin_unlock_irqrestore(&common->lock, flags);
	296	}
	297
	298	static void rcar_thermal_work(struct work_struct *work)
	299	{
	300	struct rcar_thermal_priv *priv;
	301
	302	priv = container_of(work, struct rcar_thermal_priv, work.work);
	303
	304	rcar_thermal_update_temp(priv);
	305	rcar_thermal_irq_enable(priv);
	306	thermal_zone_device_update(priv->zone);
	307	}
	308
	309	static u32 rcar_thermal_had_changed(struct rcar_thermal_priv *priv, u32 status)
	310	{
	311	struct device *dev = rcar_priv_to_dev(priv);
	312
	313	status = (status >> rcar_id_to_shift(priv)) & 0x3;
	314
	315	if (status & 0x3) {
	316	dev_dbg(dev, "thermal%d %s%s\n",
	317	priv->id,
	318	(status & 0x2) ? "Rising " : "",
	319	(status & 0x1) ? "Falling" : "");
	320	}
	321
	322	return status;
	323	}
	324
	325	static irqreturn_t rcar_thermal_irq(int irq, void *data)
	326	{
	327	struct rcar_thermal_common *common = data;
	328	struct rcar_thermal_priv *priv;
	329	unsigned long flags;
	330	u32 status, mask;
	331
	332	spin_lock_irqsave(&common->lock, flags);
	333
	334	mask = rcar_thermal_common_read(common, INTMSK);
	335	status = rcar_thermal_common_read(common, STR);
	336	rcar_thermal_common_write(common, STR, 0x000F0F0F & mask);
	337
	338	spin_unlock_irqrestore(&common->lock, flags);
	339
	340	status = status & ~mask;
	341
	342	/*
	343	* check the status
344	*/
345	rcar_thermal_for_each_priv(priv, common) {
346	if (rcar_thermal_had_changed(priv, status)) {
347	rcar_thermal_irq_disable(priv);
348	schedule_delayed_work(&priv->work,
349	msecs_to_jiffies(300));
350	}
351	}
352
353	return IRQ_HANDLED;
354	}
355
1e426ffd KM	356	/*
	357	* platform functions
	358	*/
	359	static int rcar_thermal_probe(struct platform_device *pdev)
	360	{
3676d1dd	361	struct rcar_thermal_common *common;
1e426ffd	362	struct rcar_thermal_priv *priv;
3676d1dd KM	363	struct device *dev = &pdev->dev;
	364	struct resource res, irq;
	365	int mres = 0;
	366	int i;
e0a5172e	367	int idle = IDLE_INTERVAL;
1e426ffd	368
3676d1dd KM	369	common = devm_kzalloc(dev, sizeof(*common), GFP_KERNEL);
	370	if (!common) {
	371	dev_err(dev, "Could not allocate common\n");
1e426ffd KM	372	return -ENOMEM;
	373	}
	374
3676d1dd	375	INIT_LIST_HEAD(&common->head);
e0a5172e	376	spin_lock_init(&common->lock);
3676d1dd KM	377	common->dev = dev;
	378
	379	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	380	if (irq) {
e0a5172e KM	381	int ret;
e0a5172e KM	382
3676d1dd KM	383	/*
	384	* platform has IRQ support.
	385	* Then, drier use common register
	386	*/
	387	res = platform_get_resource(pdev, IORESOURCE_MEM, mres++);
	388	if (!res) {
	389	dev_err(dev, "Could not get platform resource\n");
	390	return -ENODEV;
	391	}
	392
e0a5172e KM	393	ret = devm_request_irq(dev, irq->start, rcar_thermal_irq, 0,
	394	dev_name(dev), common);
	395	if (ret) {
	396	dev_err(dev, "irq request failed\n ");
	397	return ret;
	398	}
	399
3676d1dd KM	400	/*
	401	* rcar_has_irq_support() will be enabled
	402	*/
	403	common->base = devm_request_and_ioremap(dev, res);
	404	if (!common->base) {
	405	dev_err(dev, "Unable to ioremap thermal register\n");
	406	return -ENOMEM;
	407	}
e0a5172e KM	408
	409	/* enable temperature comparation */
	410	rcar_thermal_common_write(common, ENR, 0x00030303);
	411
	412	idle = 0; /* polling delaye is not needed */
1e426ffd KM	413	}
1e426ffd KM	414
3676d1dd KM	415	for (i = 0;; i++) {
	416	res = platform_get_resource(pdev, IORESOURCE_MEM, mres++);
	417	if (!res)
	418	break;
	419
	420	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	421	if (!priv) {
	422	dev_err(dev, "Could not allocate priv\n");
	423	return -ENOMEM;
	424	}
	425
	426	priv->base = devm_request_and_ioremap(dev, res);
	427	if (!priv->base) {
	428	dev_err(dev, "Unable to ioremap priv register\n");
	429	return -ENOMEM;
	430	}
	431
	432	priv->common = common;
e0a5172e	433	priv->id = i;
3676d1dd KM	434	mutex_init(&priv->lock);
3676d1dd KM	435	INIT_LIST_HEAD(&priv->list);
e0a5172e KM	436	INIT_DELAYED_WORK(&priv->work, rcar_thermal_work);
e0a5172e KM	437	rcar_thermal_update_temp(priv);
3676d1dd KM	438
	439	priv->zone = thermal_zone_device_register("rcar_thermal",
	440	1, 0, priv,
	441	&rcar_thermal_zone_ops, NULL, 0,
e0a5172e	442	idle);
3676d1dd KM	443	if (IS_ERR(priv->zone)) {
	444	dev_err(dev, "can't register thermal zone\n");
	445	goto error_unregister;
	446	}
	447
	448	list_move_tail(&priv->list, &common->head);
e0a5172e KM	449
	450	if (rcar_has_irq_support(priv))
	451	rcar_thermal_irq_enable(priv);
1e426ffd KM	452	}
1e426ffd KM	453
3676d1dd	454	platform_set_drvdata(pdev, common);
1e426ffd	455
3676d1dd	456	dev_info(dev, "%d sensor proved\n", i);
1e426ffd KM	457
1e426ffd KM	458	return 0;
3676d1dd KM	459
	460	error_unregister:
	461	rcar_thermal_for_each_priv(priv, common)
	462	thermal_zone_device_unregister(priv->zone);
	463
	464	return -ENODEV;
1e426ffd KM	465	}
	466
	467	static int rcar_thermal_remove(struct platform_device *pdev)
	468	{
3676d1dd KM	469	struct rcar_thermal_common *common = platform_get_drvdata(pdev);
	470	struct rcar_thermal_priv *priv;
	471
	472	rcar_thermal_for_each_priv(priv, common)
	473	thermal_zone_device_unregister(priv->zone);
1e426ffd	474
1e426ffd KM	475	platform_set_drvdata(pdev, NULL);
1e426ffd KM	476
1e426ffd KM	477	return 0;
	478	}
	479
f5b6d45f	480	static const struct of_device_id rcar_thermal_dt_ids[] = {
76cc1887 KM	481	{ .compatible = "renesas,rcar-thermal", },
	482	{},
	483	};
	484	MODULE_DEVICE_TABLE(of, rcar_thermal_dt_ids);
	485
1e426ffd KM	486	static struct platform_driver rcar_thermal_driver = {
	487	.driver = {
	488	.name = "rcar_thermal",
76cc1887	489	.of_match_table = rcar_thermal_dt_ids,
1e426ffd KM	490	},
	491	.probe = rcar_thermal_probe,
	492	.remove = rcar_thermal_remove,
	493	};
	494	module_platform_driver(rcar_thermal_driver);
	495
	496	MODULE_LICENSE("GPL");
	497	MODULE_DESCRIPTION("R-Car THS/TSC thermal sensor driver");
	498	MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");