[linux-2.6-block.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_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);
		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)) {
		result = -EINVAL;
		goto err;
	}

	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
	28	#define INT3403_THERMAL_EVENT 0x90
	29
593df404	30	/* Preserved structure for future expandbility */
4384b8fe	31	struct int3403_sensor {
593df404	32	struct int34x_thermal_zone *int340x_zone;
4384b8fe LT	33	};
	34
	35	struct int3403_performance_state {
	36	u64 performance;
	37	u64 power;
	38	u64 latency;
	39	u64 linear;
	40	u64 control;
	41	u64 raw_performace;
	42	char *raw_unit;
	43	int reserved;
	44	};
	45
	46	struct int3403_cdev {
	47	struct thermal_cooling_device *cdev;
	48	unsigned long max_state;
	49	};
	50
	51	struct int3403_priv {
	52	struct platform_device *pdev;
	53	struct acpi_device *adev;
	54	unsigned long long type;
	55	void *priv;
	56	};
	57
4384b8fe LT	58	static void int3403_notify(acpi_handle handle,
	59	u32 event, void *data)
	60	{
	61	struct int3403_priv *priv = data;
	62	struct int3403_sensor *obj;
	63
	64	if (!priv)
	65	return;
	66
	67	obj = priv->priv;
	68	if (priv->type != INT3403_TYPE_SENSOR \|\| !obj)
	69	return;
	70
	71	switch (event) {
	72	case INT3403_PERF_CHANGED_EVENT:
	73	break;
	74	case INT3403_THERMAL_EVENT:
593df404	75	int340x_thermal_zone_device_update(obj->int340x_zone);
4384b8fe LT	76	break;
	77	default:
	78	dev_err(&priv->pdev->dev, "Unsupported event [0x%x]\n", event);
	79	break;
	80	}
	81	}
	82
4384b8fe LT	83	static int int3403_sensor_add(struct int3403_priv *priv)
	84	{
	85	int result = 0;
4384b8fe	86	struct int3403_sensor *obj;
4384b8fe LT	87
	88	obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
	89	if (!obj)
	90	return -ENOMEM;
	91
	92	priv->priv = obj;
	93
593df404 SP	94	obj->int340x_zone = int340x_thermal_zone_add(priv->adev, NULL);
	95	if (IS_ERR(obj->int340x_zone))
	96	return PTR_ERR(obj->int340x_zone);
4384b8fe LT	97
	98	result = acpi_install_notify_handler(priv->adev->handle,
	99	ACPI_DEVICE_NOTIFY, int3403_notify,
	100	(void *)priv);
	101	if (result)
	102	goto err_free_obj;
	103
	104	return 0;
	105
	106	err_free_obj:
593df404	107	int340x_thermal_zone_remove(obj->int340x_zone);
4384b8fe LT	108	return result;
	109	}
	110
	111	static int int3403_sensor_remove(struct int3403_priv *priv)
	112	{
	113	struct int3403_sensor *obj = priv->priv;
	114
f8061d38 SP	115	acpi_remove_notify_handler(priv->adev->handle,
f8061d38 SP	116	ACPI_DEVICE_NOTIFY, int3403_notify);
593df404 SP	117	int340x_thermal_zone_remove(obj->int340x_zone);
593df404 SP	118
4384b8fe LT	119	return 0;
	120	}
	121
	122	/* INT3403 Cooling devices */
	123	static int int3403_get_max_state(struct thermal_cooling_device *cdev,
	124	unsigned long *state)
	125	{
	126	struct int3403_priv *priv = cdev->devdata;
	127	struct int3403_cdev *obj = priv->priv;
	128
	129	*state = obj->max_state;
	130	return 0;
	131	}
	132
	133	static int int3403_get_cur_state(struct thermal_cooling_device *cdev,
	134	unsigned long *state)
	135	{
	136	struct int3403_priv *priv = cdev->devdata;
	137	unsigned long long level;
	138	acpi_status status;
	139
	140	status = acpi_evaluate_integer(priv->adev->handle, "PPPC", NULL, &level);
	141	if (ACPI_SUCCESS(status)) {
	142	*state = level;
	143	return 0;
	144	} else
	145	return -EINVAL;
	146	}
	147
	148	static int
	149	int3403_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
	150	{
	151	struct int3403_priv *priv = cdev->devdata;
	152	acpi_status status;
	153
	154	status = acpi_execute_simple_method(priv->adev->handle, "SPPC", state);
	155	if (ACPI_SUCCESS(status))
	156	return 0;
	157	else
	158	return -EINVAL;
	159	}
	160
	161	static const struct thermal_cooling_device_ops int3403_cooling_ops = {
	162	.get_max_state = int3403_get_max_state,
	163	.get_cur_state = int3403_get_cur_state,
	164	.set_cur_state = int3403_set_cur_state,
	165	};
	166
	167	static int int3403_cdev_add(struct int3403_priv *priv)
	168	{
	169	int result = 0;
	170	acpi_status status;
	171	struct int3403_cdev *obj;
	172	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
	173	union acpi_object *p;
	174
	175	obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
	176	if (!obj)
	177	return -ENOMEM;
	178
	179	status = acpi_evaluate_object(priv->adev->handle, "PPSS", NULL, &buf);
	180	if (ACPI_FAILURE(status))
	181	return -ENODEV;
	182
183	p = buf.pointer;
184	if (!p \|\| (p->type != ACPI_TYPE_PACKAGE)) {
185	printk(KERN_WARNING "Invalid PPSS data\n");
f01bc8f3	186	kfree(buf.pointer);
4384b8fe LT	187	return -EFAULT;
	188	}
	189
	190	obj->max_state = p->package.count - 1;
	191	obj->cdev =
	192	thermal_cooling_device_register(acpi_device_bid(priv->adev),
	193	priv, &int3403_cooling_ops);
	194	if (IS_ERR(obj->cdev))
	195	result = PTR_ERR(obj->cdev);
	196
	197	priv->priv = obj;
	198
f01bc8f3	199	kfree(buf.pointer);
4384b8fe LT	200	/* TODO: add ACPI notification support */
	201
	202	return result;
	203	}
	204
	205	static int int3403_cdev_remove(struct int3403_priv *priv)
	206	{
	207	struct int3403_cdev *obj = priv->priv;
	208
	209	thermal_cooling_device_unregister(obj->cdev);
	210	return 0;
	211	}
	212
	213	static int int3403_add(struct platform_device *pdev)
	214	{
	215	struct int3403_priv *priv;
	216	int result = 0;
	217	acpi_status status;
	218
	219	priv = devm_kzalloc(&pdev->dev, sizeof(struct int3403_priv),
	220	GFP_KERNEL);
	221	if (!priv)
	222	return -ENOMEM;
	223
	224	priv->pdev = pdev;
	225	priv->adev = ACPI_COMPANION(&(pdev->dev));
	226	if (!priv->adev) {
	227	result = -EINVAL;
	228	goto err;
	229	}
	230
	231	status = acpi_evaluate_integer(priv->adev->handle, "PTYP",
	232	NULL, &priv->type);
	233	if (ACPI_FAILURE(status)) {
	234	result = -EINVAL;
	235	goto err;
	236	}
	237
	238	platform_set_drvdata(pdev, priv);
	239	switch (priv->type) {
	240	case INT3403_TYPE_SENSOR:
	241	result = int3403_sensor_add(priv);
	242	break;
	243	case INT3403_TYPE_CHARGER:
	244	case INT3403_TYPE_BATTERY:
	245	result = int3403_cdev_add(priv);
	246	break;
	247	default:
	248	result = -EINVAL;
	249	}
	250
	251	if (result)
	252	goto err;
	253	return result;
	254
	255	err:
	256	return result;
	257	}
	258
	259	static int int3403_remove(struct platform_device *pdev)
	260	{
	261	struct int3403_priv *priv = platform_get_drvdata(pdev);
	262
	263	switch (priv->type) {
264	case INT3403_TYPE_SENSOR:
265	int3403_sensor_remove(priv);
266	break;
267	case INT3403_TYPE_CHARGER:
268	case INT3403_TYPE_BATTERY:
269	int3403_cdev_remove(priv);
270	break;
271	default:
272	break;
273	}
274
275	return 0;
276	}
277
278	static const struct acpi_device_id int3403_device_ids[] = {
279	{"INT3403", 0},
280	{"", 0},
281	};
282	MODULE_DEVICE_TABLE(acpi, int3403_device_ids);
283
284	static struct platform_driver int3403_driver = {
285	.probe = int3403_add,
286	.remove = int3403_remove,
287	.driver = {
288	.name = "int3403 thermal",
4384b8fe LT	289	.acpi_match_table = int3403_device_ids,
	290	},
	291	};
	292
	293	module_platform_driver(int3403_driver);
	294
	295	MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
	296	MODULE_LICENSE("GPL v2");
	297	MODULE_DESCRIPTION("ACPI INT3403 thermal driver");