[mirror_ubuntu-artful-kernel.git] / drivers / thermal / int340x_thermal / int3403_thermal.c

/*
 * ACPI INT3403 thermal driver
 * Copyright (c) 2013, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/acpi.h>
#include <linux/thermal.h>
#include <linux/platform_device.h>
#include "int340x_thermal_zone.h"

#define INT3403_TYPE_SENSOR		0x03
#define INT3403_TYPE_CHARGER		0x0B
#define INT3403_TYPE_BATTERY		0x0C
#define INT3403_PERF_CHANGED_EVENT	0x80
#define INT3403_PERF_TRIP_POINT_CHANGED	0x81
#define INT3403_THERMAL_EVENT		0x90

/* Preserved structure for future expandbility */
struct int3403_sensor {
	struct int34x_thermal_zone *int340x_zone;
};

struct int3403_performance_state {
	u64 performance;
	u64 power;
	u64 latency;
	u64 linear;
	u64 control;
	u64 raw_performace;
	char *raw_unit;
	int reserved;
};

struct int3403_cdev {
	struct thermal_cooling_device *cdev;
	unsigned long max_state;
};

struct int3403_priv {
	struct platform_device *pdev;
	struct acpi_device *adev;
	unsigned long long type;
	void *priv;
};

static void int3403_notify(acpi_handle handle,
		u32 event, void *data)
{
	struct int3403_priv *priv = data;
	struct int3403_sensor *obj;

	if (!priv)
		return;

	obj = priv->priv;
	if (priv->type != INT3403_TYPE_SENSOR || !obj)
		return;

	switch (event) {
	case INT3403_PERF_CHANGED_EVENT:
		break;
	case INT3403_THERMAL_EVENT:
		int340x_thermal_zone_device_update(obj->int340x_zone,
						   THERMAL_TRIP_VIOLATED);
		break;
	case INT3403_PERF_TRIP_POINT_CHANGED:
		int340x_thermal_read_trips(obj->int340x_zone);
		int340x_thermal_zone_device_update(obj->int340x_zone,
						   THERMAL_TRIP_CHANGED);
		break;
	default:
		dev_err(&priv->pdev->dev, "Unsupported event [0x%x]\n", event);
		break;
	}
}

static int int3403_sensor_add(struct int3403_priv *priv)
{
	int result = 0;
	struct int3403_sensor *obj;

	obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
	if (!obj)
		return -ENOMEM;

	priv->priv = obj;

	obj->int340x_zone = int340x_thermal_zone_add(priv->adev, NULL);
	if (IS_ERR(obj->int340x_zone))
		return PTR_ERR(obj->int340x_zone);

	result = acpi_install_notify_handler(priv->adev->handle,
			ACPI_DEVICE_NOTIFY, int3403_notify,
			(void *)priv);
	if (result)
		goto err_free_obj;

	return 0;

 err_free_obj:
	int340x_thermal_zone_remove(obj->int340x_zone);
	return result;
}

static int int3403_sensor_remove(struct int3403_priv *priv)
{
	struct int3403_sensor *obj = priv->priv;

	acpi_remove_notify_handler(priv->adev->handle,
				   ACPI_DEVICE_NOTIFY, int3403_notify);
	int340x_thermal_zone_remove(obj->int340x_zone);

	return 0;
}

/* INT3403 Cooling devices */
static int int3403_get_max_state(struct thermal_cooling_device *cdev,
				 unsigned long *state)
{
	struct int3403_priv *priv = cdev->devdata;
	struct int3403_cdev *obj = priv->priv;

	*state = obj->max_state;
	return 0;
}

static int int3403_get_cur_state(struct thermal_cooling_device *cdev,
				 unsigned long *state)
{
	struct int3403_priv *priv = cdev->devdata;
	unsigned long long level;
	acpi_status status;

	status = acpi_evaluate_integer(priv->adev->handle, "PPPC", NULL, &level);
	if (ACPI_SUCCESS(status)) {
		*state = level;
		return 0;
	} else
		return -EINVAL;
}

static int
int3403_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
{
	struct int3403_priv *priv = cdev->devdata;
	acpi_status status;

	status = acpi_execute_simple_method(priv->adev->handle, "SPPC", state);
	if (ACPI_SUCCESS(status))
		return 0;
	else
		return -EINVAL;
}

static const struct thermal_cooling_device_ops int3403_cooling_ops = {
	.get_max_state = int3403_get_max_state,
	.get_cur_state = int3403_get_cur_state,
	.set_cur_state = int3403_set_cur_state,
};

static int int3403_cdev_add(struct int3403_priv *priv)
{
	int result = 0;
	acpi_status status;
	struct int3403_cdev *obj;
	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *p;

	obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
	if (!obj)
		return -ENOMEM;

	status = acpi_evaluate_object(priv->adev->handle, "PPSS", NULL, &buf);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	p = buf.pointer;
	if (!p || (p->type != ACPI_TYPE_PACKAGE)) {
		printk(KERN_WARNING "Invalid PPSS data\n");
		kfree(buf.pointer);
		return -EFAULT;
	}

	obj->max_state = p->package.count - 1;
	obj->cdev =
		thermal_cooling_device_register(acpi_device_bid(priv->adev),
				priv, &int3403_cooling_ops);
	if (IS_ERR(obj->cdev))
		result = PTR_ERR(obj->cdev);

	priv->priv = obj;

	kfree(buf.pointer);
	/* TODO: add ACPI notification support */

	return result;
}

static int int3403_cdev_remove(struct int3403_priv *priv)
{
	struct int3403_cdev *obj = priv->priv;

	thermal_cooling_device_unregister(obj->cdev);
	return 0;
}

static int int3403_add(struct platform_device *pdev)
{
	struct int3403_priv *priv;
	int result = 0;
	acpi_status status;

	priv = devm_kzalloc(&pdev->dev, sizeof(struct int3403_priv),
			    GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->pdev = pdev;
	priv->adev = ACPI_COMPANION(&(pdev->dev));
	if (!priv->adev) {
		result = -EINVAL;
		goto err;
	}

	status = acpi_evaluate_integer(priv->adev->handle, "PTYP",
				       NULL, &priv->type);
	if (ACPI_FAILURE(status)) {
		unsigned long long tmp;

		status = acpi_evaluate_integer(priv->adev->handle, "_TMP",
					       NULL, &tmp);
		if (ACPI_FAILURE(status)) {
			result = -EINVAL;
			goto err;
		} else {
			priv->type = INT3403_TYPE_SENSOR;
		}
	}

	platform_set_drvdata(pdev, priv);
	switch (priv->type) {
	case INT3403_TYPE_SENSOR:
		result = int3403_sensor_add(priv);
		break;
	case INT3403_TYPE_CHARGER:
	case INT3403_TYPE_BATTERY:
		result = int3403_cdev_add(priv);
		break;
	default:
		result = -EINVAL;
	}

	if (result)
		goto err;
	return result;

err:
	return result;
}

static int int3403_remove(struct platform_device *pdev)
{
	struct int3403_priv *priv = platform_get_drvdata(pdev);

	switch (priv->type) {
	case INT3403_TYPE_SENSOR:
		int3403_sensor_remove(priv);
		break;
	case INT3403_TYPE_CHARGER:
	case INT3403_TYPE_BATTERY:
		int3403_cdev_remove(priv);
		break;
	default:
		break;
	}

	return 0;
}

static const struct acpi_device_id int3403_device_ids[] = {
	{"INT3403", 0},
	{"", 0},
};
MODULE_DEVICE_TABLE(acpi, int3403_device_ids);

static struct platform_driver int3403_driver = {
	.probe = int3403_add,
	.remove = int3403_remove,
	.driver = {
		.name = "int3403 thermal",
		.acpi_match_table = int3403_device_ids,
	},
};

module_platform_driver(int3403_driver);

MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("ACPI INT3403 thermal driver");
Commit	Line	Data
4384b8fe LT	1	/*
	2	* ACPI INT3403 thermal driver
	3	* Copyright (c) 2013, Intel Corporation.
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms and conditions of the GNU General Public License,
	7	* version 2, as published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*/
	14
	15	#include <linux/kernel.h>
	16	#include <linux/module.h>
	17	#include <linux/init.h>
	18	#include <linux/types.h>
	19	#include <linux/acpi.h>
	20	#include <linux/thermal.h>
	21	#include <linux/platform_device.h>
593df404	22	#include "int340x_thermal_zone.h"
4384b8fe LT	23
	24	#define INT3403_TYPE_SENSOR 0x03
	25	#define INT3403_TYPE_CHARGER 0x0B
	26	#define INT3403_TYPE_BATTERY 0x0C
	27	#define INT3403_PERF_CHANGED_EVENT 0x80
43720df9	28	#define INT3403_PERF_TRIP_POINT_CHANGED 0x81
4384b8fe LT	29	#define INT3403_THERMAL_EVENT 0x90
4384b8fe LT	30
593df404	31	/* Preserved structure for future expandbility */
4384b8fe	32	struct int3403_sensor {
593df404	33	struct int34x_thermal_zone *int340x_zone;
4384b8fe LT	34	};
	35
	36	struct int3403_performance_state {
	37	u64 performance;
	38	u64 power;
	39	u64 latency;
	40	u64 linear;
	41	u64 control;
	42	u64 raw_performace;
	43	char *raw_unit;
	44	int reserved;
	45	};
	46
	47	struct int3403_cdev {
	48	struct thermal_cooling_device *cdev;
	49	unsigned long max_state;
	50	};
	51
	52	struct int3403_priv {
	53	struct platform_device *pdev;
	54	struct acpi_device *adev;
	55	unsigned long long type;
	56	void *priv;
	57	};
	58
4384b8fe LT	59	static void int3403_notify(acpi_handle handle,
	60	u32 event, void *data)
	61	{
	62	struct int3403_priv *priv = data;
	63	struct int3403_sensor *obj;
	64
	65	if (!priv)
	66	return;
	67
	68	obj = priv->priv;
	69	if (priv->type != INT3403_TYPE_SENSOR \|\| !obj)
	70	return;
	71
	72	switch (event) {
	73	case INT3403_PERF_CHANGED_EVENT:
	74	break;
	75	case INT3403_THERMAL_EVENT:
9176ae86 SP	76	int340x_thermal_zone_device_update(obj->int340x_zone,
9176ae86 SP	77	THERMAL_TRIP_VIOLATED);
4384b8fe	78	break;
43720df9 SP	79	case INT3403_PERF_TRIP_POINT_CHANGED:
	80	int340x_thermal_read_trips(obj->int340x_zone);
	81	int340x_thermal_zone_device_update(obj->int340x_zone,
	82	THERMAL_TRIP_CHANGED);
	83	break;
4384b8fe LT	84	default:
	85	dev_err(&priv->pdev->dev, "Unsupported event [0x%x]\n", event);
	86	break;
	87	}
	88	}
	89
4384b8fe LT	90	static int int3403_sensor_add(struct int3403_priv *priv)
	91	{
	92	int result = 0;
4384b8fe	93	struct int3403_sensor *obj;
4384b8fe LT	94
	95	obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
	96	if (!obj)
	97	return -ENOMEM;
	98
	99	priv->priv = obj;
	100
593df404 SP	101	obj->int340x_zone = int340x_thermal_zone_add(priv->adev, NULL);
	102	if (IS_ERR(obj->int340x_zone))
	103	return PTR_ERR(obj->int340x_zone);
4384b8fe LT	104
	105	result = acpi_install_notify_handler(priv->adev->handle,
	106	ACPI_DEVICE_NOTIFY, int3403_notify,
	107	(void *)priv);
	108	if (result)
	109	goto err_free_obj;
	110
	111	return 0;
	112
	113	err_free_obj:
593df404	114	int340x_thermal_zone_remove(obj->int340x_zone);
4384b8fe LT	115	return result;
	116	}
	117
	118	static int int3403_sensor_remove(struct int3403_priv *priv)
	119	{
	120	struct int3403_sensor *obj = priv->priv;
	121
f8061d38 SP	122	acpi_remove_notify_handler(priv->adev->handle,
f8061d38 SP	123	ACPI_DEVICE_NOTIFY, int3403_notify);
593df404 SP	124	int340x_thermal_zone_remove(obj->int340x_zone);
593df404 SP	125
4384b8fe LT	126	return 0;
	127	}
	128
	129	/* INT3403 Cooling devices */
	130	static int int3403_get_max_state(struct thermal_cooling_device *cdev,
	131	unsigned long *state)
	132	{
	133	struct int3403_priv *priv = cdev->devdata;
	134	struct int3403_cdev *obj = priv->priv;
	135
	136	*state = obj->max_state;
	137	return 0;
	138	}
	139
	140	static int int3403_get_cur_state(struct thermal_cooling_device *cdev,
	141	unsigned long *state)
	142	{
	143	struct int3403_priv *priv = cdev->devdata;
	144	unsigned long long level;
	145	acpi_status status;
	146
	147	status = acpi_evaluate_integer(priv->adev->handle, "PPPC", NULL, &level);
	148	if (ACPI_SUCCESS(status)) {
	149	*state = level;
	150	return 0;
	151	} else
	152	return -EINVAL;
	153	}
	154
	155	static int
	156	int3403_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
	157	{
	158	struct int3403_priv *priv = cdev->devdata;
	159	acpi_status status;
	160
	161	status = acpi_execute_simple_method(priv->adev->handle, "SPPC", state);
	162	if (ACPI_SUCCESS(status))
	163	return 0;
	164	else
	165	return -EINVAL;
	166	}
	167
	168	static const struct thermal_cooling_device_ops int3403_cooling_ops = {
	169	.get_max_state = int3403_get_max_state,
	170	.get_cur_state = int3403_get_cur_state,
	171	.set_cur_state = int3403_set_cur_state,
	172	};
	173
	174	static int int3403_cdev_add(struct int3403_priv *priv)
	175	{
	176	int result = 0;
	177	acpi_status status;
	178	struct int3403_cdev *obj;
	179	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
	180	union acpi_object *p;
	181
	182	obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
	183	if (!obj)
	184	return -ENOMEM;
	185
	186	status = acpi_evaluate_object(priv->adev->handle, "PPSS", NULL, &buf);
	187	if (ACPI_FAILURE(status))
	188	return -ENODEV;
	189
190	p = buf.pointer;
191	if (!p \|\| (p->type != ACPI_TYPE_PACKAGE)) {
192	printk(KERN_WARNING "Invalid PPSS data\n");
f01bc8f3	193	kfree(buf.pointer);
4384b8fe LT	194	return -EFAULT;
	195	}
	196
	197	obj->max_state = p->package.count - 1;
	198	obj->cdev =
	199	thermal_cooling_device_register(acpi_device_bid(priv->adev),
	200	priv, &int3403_cooling_ops);
	201	if (IS_ERR(obj->cdev))
	202	result = PTR_ERR(obj->cdev);
	203
	204	priv->priv = obj;
	205
f01bc8f3	206	kfree(buf.pointer);
4384b8fe LT	207	/* TODO: add ACPI notification support */
	208
	209	return result;
	210	}
	211
	212	static int int3403_cdev_remove(struct int3403_priv *priv)
	213	{
	214	struct int3403_cdev *obj = priv->priv;
	215
	216	thermal_cooling_device_unregister(obj->cdev);
	217	return 0;
	218	}
	219
	220	static int int3403_add(struct platform_device *pdev)
	221	{
	222	struct int3403_priv *priv;
	223	int result = 0;
	224	acpi_status status;
	225
	226	priv = devm_kzalloc(&pdev->dev, sizeof(struct int3403_priv),
	227	GFP_KERNEL);
	228	if (!priv)
	229	return -ENOMEM;
	230
	231	priv->pdev = pdev;
	232	priv->adev = ACPI_COMPANION(&(pdev->dev));
	233	if (!priv->adev) {
	234	result = -EINVAL;
	235	goto err;
	236	}
	237
	238	status = acpi_evaluate_integer(priv->adev->handle, "PTYP",
	239	NULL, &priv->type);
	240	if (ACPI_FAILURE(status)) {
4ca0e75e SP	241	unsigned long long tmp;
	242
	243	status = acpi_evaluate_integer(priv->adev->handle, "_TMP",
	244	NULL, &tmp);
	245	if (ACPI_FAILURE(status)) {
	246	result = -EINVAL;
	247	goto err;
	248	} else {
	249	priv->type = INT3403_TYPE_SENSOR;
	250	}
4384b8fe LT	251	}
	252
	253	platform_set_drvdata(pdev, priv);
	254	switch (priv->type) {
	255	case INT3403_TYPE_SENSOR:
	256	result = int3403_sensor_add(priv);
	257	break;
	258	case INT3403_TYPE_CHARGER:
	259	case INT3403_TYPE_BATTERY:
	260	result = int3403_cdev_add(priv);
	261	break;
	262	default:
	263	result = -EINVAL;
	264	}
	265
	266	if (result)
	267	goto err;
	268	return result;
	269
	270	err:
	271	return result;
	272	}
	273
	274	static int int3403_remove(struct platform_device *pdev)
	275	{
	276	struct int3403_priv *priv = platform_get_drvdata(pdev);
	277
	278	switch (priv->type) {
	279	case INT3403_TYPE_SENSOR:
	280	int3403_sensor_remove(priv);
	281	break;
	282	case INT3403_TYPE_CHARGER:
	283	case INT3403_TYPE_BATTERY:
	284	int3403_cdev_remove(priv);
	285	break;
	286	default:
	287	break;
	288	}
	289
	290	return 0;
	291	}
	292
	293	static const struct acpi_device_id int3403_device_ids[] = {
	294	{"INT3403", 0},
	295	{"", 0},
	296	};
	297	MODULE_DEVICE_TABLE(acpi, int3403_device_ids);
	298
	299	static struct platform_driver int3403_driver = {
	300	.probe = int3403_add,
	301	.remove = int3403_remove,
	302	.driver = {
	303	.name = "int3403 thermal",
4384b8fe LT	304	.acpi_match_table = int3403_device_ids,
	305	},
	306	};
	307
	308	module_platform_driver(int3403_driver);
	309
	310	MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
	311	MODULE_LICENSE("GPL v2");
	312	MODULE_DESCRIPTION("ACPI INT3403 thermal driver");