[linux-block.git] / drivers / acpi / dptf / dptf_power.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * dptf_power:  DPTF platform power driver
 * Copyright (c) 2016, Intel Corporation.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/acpi.h>
#include <linux/platform_device.h>

/*
 * Presentation of attributes which are defined for INT3407 and INT3532.
 * They are:
 * PMAX : Maximum platform powe
 * PSRC : Platform power source
 * ARTG : Adapter rating
 * CTYP : Charger type
 * PBSS : Battery steady power
 * PROP : Rest of worst case platform Power
 * PBSS : Power Battery Steady State
 * PBSS : Power Battery Steady State
 * RBHF : High Frequency Impedance
 * VBNL : Instantaneous No-Load Voltage
 * CMPP : Current Discharge Capability
 */
#define DPTF_POWER_SHOW(name, object) \
static ssize_t name##_show(struct device *dev,\
			   struct device_attribute *attr,\
			   char *buf)\
{\
	struct acpi_device *acpi_dev = dev_get_drvdata(dev);\
	unsigned long long val;\
	acpi_status status;\
\
	status = acpi_evaluate_integer(acpi_dev->handle, #object,\
				       NULL, &val);\
	if (ACPI_SUCCESS(status))\
		return sprintf(buf, "%d\n", (int)val);\
	else \
		return -EINVAL;\
}

DPTF_POWER_SHOW(max_platform_power_mw, PMAX)
DPTF_POWER_SHOW(platform_power_source, PSRC)
DPTF_POWER_SHOW(adapter_rating_mw, ARTG)
DPTF_POWER_SHOW(battery_steady_power_mw, PBSS)
DPTF_POWER_SHOW(charger_type, CTYP)
DPTF_POWER_SHOW(rest_of_platform_power_mw, PROP)
DPTF_POWER_SHOW(max_steady_state_power_mw, PBSS)
DPTF_POWER_SHOW(high_freq_impedance_mohm, RBHF)
DPTF_POWER_SHOW(no_load_voltage_mv, VBNL)
DPTF_POWER_SHOW(current_discharge_capbility_ma, CMPP);

static DEVICE_ATTR_RO(max_platform_power_mw);
static DEVICE_ATTR_RO(platform_power_source);
static DEVICE_ATTR_RO(adapter_rating_mw);
static DEVICE_ATTR_RO(battery_steady_power_mw);
static DEVICE_ATTR_RO(charger_type);
static DEVICE_ATTR_RO(rest_of_platform_power_mw);
static DEVICE_ATTR_RO(max_steady_state_power_mw);
static DEVICE_ATTR_RO(high_freq_impedance_mohm);
static DEVICE_ATTR_RO(no_load_voltage_mv);
static DEVICE_ATTR_RO(current_discharge_capbility_ma);

static ssize_t prochot_confirm_store(struct device *dev,
				     struct device_attribute *attr,
				     const char *buf, size_t count)
{
	struct acpi_device *acpi_dev = dev_get_drvdata(dev);
	acpi_status status;
	int seq_no;

	if (kstrtouint(buf, 0, &seq_no) < 0)
		return -EINVAL;

	status = acpi_execute_simple_method(acpi_dev->handle, "PBOK", seq_no);
	if (ACPI_SUCCESS(status))
		return count;

	return -EINVAL;
}

static DEVICE_ATTR_WO(prochot_confirm);

static struct attribute *dptf_power_attrs[] = {
	&dev_attr_max_platform_power_mw.attr,
	&dev_attr_platform_power_source.attr,
	&dev_attr_adapter_rating_mw.attr,
	&dev_attr_battery_steady_power_mw.attr,
	&dev_attr_charger_type.attr,
	&dev_attr_rest_of_platform_power_mw.attr,
	&dev_attr_prochot_confirm.attr,
	NULL
};

static const struct attribute_group dptf_power_attribute_group = {
	.attrs = dptf_power_attrs,
	.name = "dptf_power"
};

static struct attribute *dptf_battery_attrs[] = {
	&dev_attr_max_platform_power_mw.attr,
	&dev_attr_max_steady_state_power_mw.attr,
	&dev_attr_high_freq_impedance_mohm.attr,
	&dev_attr_no_load_voltage_mv.attr,
	&dev_attr_current_discharge_capbility_ma.attr,
	NULL
};

static const struct attribute_group dptf_battery_attribute_group = {
	.attrs = dptf_battery_attrs,
	.name = "dptf_battery"
};

#define MAX_POWER_CHANGED		0x80
#define POWER_STATE_CHANGED		0x81
#define STEADY_STATE_POWER_CHANGED	0x83
#define POWER_PROP_CHANGE_EVENT	0x84
#define IMPEDANCED_CHNGED		0x85
#define VOLTAGE_CURRENT_CHANGED	0x86

static long long dptf_participant_type(acpi_handle handle)
{
	unsigned long long ptype;
	acpi_status status;

	status = acpi_evaluate_integer(handle, "PTYP", NULL, &ptype);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	return ptype;
}

static void dptf_power_notify(acpi_handle handle, u32 event, void *data)
{
	struct platform_device *pdev = data;
	char *attr;

	switch (event) {
	case POWER_STATE_CHANGED:
		attr = "platform_power_source";
		break;
	case POWER_PROP_CHANGE_EVENT:
		attr = "rest_of_platform_power_mw";
		break;
	case MAX_POWER_CHANGED:
		attr = "max_platform_power_mw";
		break;
	case STEADY_STATE_POWER_CHANGED:
		attr = "max_steady_state_power_mw";
		break;
	case VOLTAGE_CURRENT_CHANGED:
		attr = "no_load_voltage_mv";
		break;
	default:
		dev_err(&pdev->dev, "Unsupported event [0x%x]\n", event);
		return;
	}

	/*
	 * Notify that an attribute is changed, so that user space can read
	 * again.
	 */
	if (dptf_participant_type(handle) == 0x0CULL)
		sysfs_notify(&pdev->dev.kobj, "dptf_battery", attr);
	else
		sysfs_notify(&pdev->dev.kobj, "dptf_power", attr);
}

static int dptf_power_add(struct platform_device *pdev)
{
	const struct attribute_group *attr_group;
	struct acpi_device *acpi_dev;
	unsigned long long ptype;
	int result;

	acpi_dev = ACPI_COMPANION(&(pdev->dev));
	if (!acpi_dev)
		return -ENODEV;

	ptype = dptf_participant_type(acpi_dev->handle);
	if (ptype == 0x11)
		attr_group = &dptf_power_attribute_group;
	else if (ptype == 0x0C)
		attr_group = &dptf_battery_attribute_group;
	else
		return -ENODEV;

	result = acpi_install_notify_handler(acpi_dev->handle,
					     ACPI_DEVICE_NOTIFY,
					     dptf_power_notify,
					     (void *)pdev);
	if (result)
		return result;

	result = sysfs_create_group(&pdev->dev.kobj,
				    attr_group);
	if (result) {
		acpi_remove_notify_handler(acpi_dev->handle,
					   ACPI_DEVICE_NOTIFY,
					   dptf_power_notify);
		return result;
	}

	platform_set_drvdata(pdev, acpi_dev);

	return 0;
}

static int dptf_power_remove(struct platform_device *pdev)
{
	struct acpi_device *acpi_dev = platform_get_drvdata(pdev);

	acpi_remove_notify_handler(acpi_dev->handle,
				   ACPI_DEVICE_NOTIFY,
				   dptf_power_notify);

	if (dptf_participant_type(acpi_dev->handle) == 0x0CULL)
		sysfs_remove_group(&pdev->dev.kobj, &dptf_battery_attribute_group);
	else
		sysfs_remove_group(&pdev->dev.kobj, &dptf_power_attribute_group);

	return 0;
}

static const struct acpi_device_id int3407_device_ids[] = {
	{"INT3407", 0},
	{"INT3532", 0},
	{"INTC1047", 0},
	{"INTC1050", 0},
	{"", 0},
};
MODULE_DEVICE_TABLE(acpi, int3407_device_ids);

static struct platform_driver dptf_power_driver = {
	.probe = dptf_power_add,
	.remove = dptf_power_remove,
	.driver = {
		.name = "DPTF Platform Power",
		.acpi_match_table = int3407_device_ids,
	},
};

module_platform_driver(dptf_power_driver);

MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("ACPI DPTF platform power driver");
Commit	Line	Data
2025cf9e	1	// SPDX-License-Identifier: GPL-2.0-only
6256ebd5 SP	2	/*
	3	* dptf_power: DPTF platform power driver
	4	* Copyright (c) 2016, Intel Corporation.
6256ebd5 SP	5	*/
	6
	7	#include <linux/kernel.h>
	8	#include <linux/module.h>
	9	#include <linux/acpi.h>
	10	#include <linux/platform_device.h>
	11
	12	/*
7b52b200 SP	13	* Presentation of attributes which are defined for INT3407 and INT3532.
7b52b200 SP	14	* They are:
6256ebd5 SP	15	* PMAX : Maximum platform powe
	16	* PSRC : Platform power source
	17	* ARTG : Adapter rating
	18	* CTYP : Charger type
	19	* PBSS : Battery steady power
668ce99e	20	* PROP : Rest of worst case platform Power
7b52b200 SP	21	* PBSS : Power Battery Steady State
	22	* PBSS : Power Battery Steady State
	23	* RBHF : High Frequency Impedance
	24	* VBNL : Instantaneous No-Load Voltage
	25	* CMPP : Current Discharge Capability
6256ebd5 SP	26	*/
	27	#define DPTF_POWER_SHOW(name, object) \
	28	static ssize_t name##_show(struct device *dev,\
	29	struct device_attribute *attr,\
	30	char *buf)\
	31	{\
b0f65b91	32	struct acpi_device *acpi_dev = dev_get_drvdata(dev);\
6256ebd5 SP	33	unsigned long long val;\
	34	acpi_status status;\
	35	\
	36	status = acpi_evaluate_integer(acpi_dev->handle, #object,\
	37	NULL, &val);\
	38	if (ACPI_SUCCESS(status))\
	39	return sprintf(buf, "%d\n", (int)val);\
	40	else \
	41	return -EINVAL;\
	42	}
	43
	44	DPTF_POWER_SHOW(max_platform_power_mw, PMAX)
	45	DPTF_POWER_SHOW(platform_power_source, PSRC)
	46	DPTF_POWER_SHOW(adapter_rating_mw, ARTG)
	47	DPTF_POWER_SHOW(battery_steady_power_mw, PBSS)
	48	DPTF_POWER_SHOW(charger_type, CTYP)
668ce99e	49	DPTF_POWER_SHOW(rest_of_platform_power_mw, PROP)
7b52b200 SP	50	DPTF_POWER_SHOW(max_steady_state_power_mw, PBSS)
	51	DPTF_POWER_SHOW(high_freq_impedance_mohm, RBHF)
	52	DPTF_POWER_SHOW(no_load_voltage_mv, VBNL)
	53	DPTF_POWER_SHOW(current_discharge_capbility_ma, CMPP);
6256ebd5 SP	54
	55	static DEVICE_ATTR_RO(max_platform_power_mw);
	56	static DEVICE_ATTR_RO(platform_power_source);
	57	static DEVICE_ATTR_RO(adapter_rating_mw);
	58	static DEVICE_ATTR_RO(battery_steady_power_mw);
	59	static DEVICE_ATTR_RO(charger_type);
668ce99e	60	static DEVICE_ATTR_RO(rest_of_platform_power_mw);
7b52b200 SP	61	static DEVICE_ATTR_RO(max_steady_state_power_mw);
	62	static DEVICE_ATTR_RO(high_freq_impedance_mohm);
	63	static DEVICE_ATTR_RO(no_load_voltage_mv);
	64	static DEVICE_ATTR_RO(current_discharge_capbility_ma);
668ce99e SP	65
	66	static ssize_t prochot_confirm_store(struct device *dev,
	67	struct device_attribute *attr,
	68	const char *buf, size_t count)
	69	{
	70	struct acpi_device *acpi_dev = dev_get_drvdata(dev);
	71	acpi_status status;
	72	int seq_no;
	73
	74	if (kstrtouint(buf, 0, &seq_no) < 0)
	75	return -EINVAL;
	76
	77	status = acpi_execute_simple_method(acpi_dev->handle, "PBOK", seq_no);
	78	if (ACPI_SUCCESS(status))
	79	return count;
	80
	81	return -EINVAL;
	82	}
	83
	84	static DEVICE_ATTR_WO(prochot_confirm);
6256ebd5 SP	85
	86	static struct attribute *dptf_power_attrs[] = {
	87	&dev_attr_max_platform_power_mw.attr,
	88	&dev_attr_platform_power_source.attr,
	89	&dev_attr_adapter_rating_mw.attr,
	90	&dev_attr_battery_steady_power_mw.attr,
	91	&dev_attr_charger_type.attr,
668ce99e SP	92	&dev_attr_rest_of_platform_power_mw.attr,
668ce99e SP	93	&dev_attr_prochot_confirm.attr,
6256ebd5 SP	94	NULL
	95	};
	96
9e4de6a8	97	static const struct attribute_group dptf_power_attribute_group = {
6256ebd5 SP	98	.attrs = dptf_power_attrs,
	99	.name = "dptf_power"
	100	};
	101
7b52b200 SP	102	static struct attribute *dptf_battery_attrs[] = {
	103	&dev_attr_max_platform_power_mw.attr,
	104	&dev_attr_max_steady_state_power_mw.attr,
	105	&dev_attr_high_freq_impedance_mohm.attr,
	106	&dev_attr_no_load_voltage_mv.attr,
	107	&dev_attr_current_discharge_capbility_ma.attr,
	108	NULL
	109	};
	110
	111	static const struct attribute_group dptf_battery_attribute_group = {
	112	.attrs = dptf_battery_attrs,
	113	.name = "dptf_battery"
	114	};
	115
	116	#define MAX_POWER_CHANGED 0x80
668ce99e	117	#define POWER_STATE_CHANGED 0x81
7b52b200	118	#define STEADY_STATE_POWER_CHANGED 0x83
668ce99e	119	#define POWER_PROP_CHANGE_EVENT 0x84
7b52b200 SP	120	#define IMPEDANCED_CHNGED 0x85
	121	#define VOLTAGE_CURRENT_CHANGED 0x86
	122
	123	static long long dptf_participant_type(acpi_handle handle)
	124	{
	125	unsigned long long ptype;
	126	acpi_status status;
	127
	128	status = acpi_evaluate_integer(handle, "PTYP", NULL, &ptype);
	129	if (ACPI_FAILURE(status))
	130	return -ENODEV;
	131
	132	return ptype;
	133	}
668ce99e SP	134
	135	static void dptf_power_notify(acpi_handle handle, u32 event, void *data)
	136	{
	137	struct platform_device *pdev = data;
	138	char *attr;
	139
	140	switch (event) {
	141	case POWER_STATE_CHANGED:
	142	attr = "platform_power_source";
	143	break;
	144	case POWER_PROP_CHANGE_EVENT:
	145	attr = "rest_of_platform_power_mw";
	146	break;
7b52b200 SP	147	case MAX_POWER_CHANGED:
	148	attr = "max_platform_power_mw";
	149	break;
	150	case STEADY_STATE_POWER_CHANGED:
	151	attr = "max_steady_state_power_mw";
	152	break;
	153	case VOLTAGE_CURRENT_CHANGED:
	154	attr = "no_load_voltage_mv";
	155	break;
668ce99e SP	156	default:
	157	dev_err(&pdev->dev, "Unsupported event [0x%x]\n", event);
	158	return;
	159	}
	160
	161	/*
	162	* Notify that an attribute is changed, so that user space can read
	163	* again.
	164	*/
7b52b200 SP	165	if (dptf_participant_type(handle) == 0x0CULL)
	166	sysfs_notify(&pdev->dev.kobj, "dptf_battery", attr);
	167	else
	168	sysfs_notify(&pdev->dev.kobj, "dptf_power", attr);
668ce99e SP	169	}
668ce99e SP	170
6256ebd5 SP	171	static int dptf_power_add(struct platform_device *pdev)
6256ebd5 SP	172	{
7b52b200	173	const struct attribute_group *attr_group;
6256ebd5	174	struct acpi_device *acpi_dev;
6256ebd5 SP	175	unsigned long long ptype;
	176	int result;
	177
	178	acpi_dev = ACPI_COMPANION(&(pdev->dev));
	179	if (!acpi_dev)
	180	return -ENODEV;
	181
7b52b200 SP	182	ptype = dptf_participant_type(acpi_dev->handle);
	183	if (ptype == 0x11)
	184	attr_group = &dptf_power_attribute_group;
	185	else if (ptype == 0x0C)
	186	attr_group = &dptf_battery_attribute_group;
	187	else
6256ebd5 SP	188	return -ENODEV;
6256ebd5 SP	189
668ce99e SP	190	result = acpi_install_notify_handler(acpi_dev->handle,
	191	ACPI_DEVICE_NOTIFY,
	192	dptf_power_notify,
	193	(void *)pdev);
	194	if (result)
	195	return result;
	196
6256ebd5	197	result = sysfs_create_group(&pdev->dev.kobj,
7b52b200	198	attr_group);
668ce99e SP	199	if (result) {
	200	acpi_remove_notify_handler(acpi_dev->handle,
	201	ACPI_DEVICE_NOTIFY,
	202	dptf_power_notify);
6256ebd5	203	return result;
668ce99e	204	}
6256ebd5 SP	205
	206	platform_set_drvdata(pdev, acpi_dev);
	207
	208	return 0;
	209	}
	210
	211	static int dptf_power_remove(struct platform_device *pdev)
	212	{
668ce99e	213	struct acpi_device *acpi_dev = platform_get_drvdata(pdev);
6256ebd5	214
668ce99e SP	215	acpi_remove_notify_handler(acpi_dev->handle,
	216	ACPI_DEVICE_NOTIFY,
	217	dptf_power_notify);
7b52b200 SP	218
	219	if (dptf_participant_type(acpi_dev->handle) == 0x0CULL)
	220	sysfs_remove_group(&pdev->dev.kobj, &dptf_battery_attribute_group);
	221	else
	222	sysfs_remove_group(&pdev->dev.kobj, &dptf_power_attribute_group);
6256ebd5 SP	223
	224	return 0;
	225	}
	226
	227	static const struct acpi_device_id int3407_device_ids[] = {
	228	{"INT3407", 0},
7b52b200	229	{"INT3532", 0},
b62c770f	230	{"INTC1047", 0},
1e05daca	231	{"INTC1050", 0},
6256ebd5 SP	232	{"", 0},
	233	};
	234	MODULE_DEVICE_TABLE(acpi, int3407_device_ids);
	235
	236	static struct platform_driver dptf_power_driver = {
	237	.probe = dptf_power_add,
	238	.remove = dptf_power_remove,
	239	.driver = {
	240	.name = "DPTF Platform Power",
	241	.acpi_match_table = int3407_device_ids,
	242	},
	243	};
	244
	245	module_platform_driver(dptf_power_driver);
	246
	247	MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
	248	MODULE_LICENSE("GPL v2");
	249	MODULE_DESCRIPTION("ACPI DPTF platform power driver");