[linux-2.6-block.git] / drivers / hwmon / sch5636.c

// SPDX-License-Identifier: GPL-2.0-or-later
/***************************************************************************
 *   Copyright (C) 2011-2012 Hans de Goede <hdegoede@redhat.com>           *
 *                                                                         *
 ***************************************************************************/

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include "sch56xx-common.h"

#define DRVNAME "sch5636"
#define DEVNAME "theseus" /* We only support one model for now */

#define SCH5636_REG_FUJITSU_ID		0x780
#define SCH5636_REG_FUJITSU_REV		0x783

#define SCH5636_NO_INS			5
#define SCH5636_NO_TEMPS		16
#define SCH5636_NO_FANS			8

static const u16 SCH5636_REG_IN_VAL[SCH5636_NO_INS] = {
	0x22, 0x23, 0x24, 0x25, 0x189 };
static const u16 SCH5636_REG_IN_FACTORS[SCH5636_NO_INS] = {
	4400, 1500, 4000, 4400, 16000 };
static const char * const SCH5636_IN_LABELS[SCH5636_NO_INS] = {
	"3.3V", "VREF", "VBAT", "3.3AUX", "12V" };

static const u16 SCH5636_REG_TEMP_VAL[SCH5636_NO_TEMPS] = {
	0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181,
	0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C };
#define SCH5636_REG_TEMP_CTRL(i)	(0x790 + (i))
#define SCH5636_TEMP_WORKING		0x01
#define SCH5636_TEMP_ALARM		0x02
#define SCH5636_TEMP_DEACTIVATED	0x80

static const u16 SCH5636_REG_FAN_VAL[SCH5636_NO_FANS] = {
	0x2C, 0x2E, 0x30, 0x32, 0x62, 0x64, 0x66, 0x68 };
#define SCH5636_REG_FAN_CTRL(i)		(0x880 + (i))
/* FAULT in datasheet, but acts as an alarm */
#define SCH5636_FAN_ALARM		0x04
#define SCH5636_FAN_NOT_PRESENT		0x08
#define SCH5636_FAN_DEACTIVATED		0x80


struct sch5636_data {
	unsigned short addr;
	struct device *hwmon_dev;
	struct sch56xx_watchdog_data *watchdog;

	struct mutex update_lock;
	char valid;			/* !=0 if following fields are valid */
	unsigned long last_updated;	/* In jiffies */
	u8 in[SCH5636_NO_INS];
	u8 temp_val[SCH5636_NO_TEMPS];
	u8 temp_ctrl[SCH5636_NO_TEMPS];
	u16 fan_val[SCH5636_NO_FANS];
	u8 fan_ctrl[SCH5636_NO_FANS];
};

static struct sch5636_data *sch5636_update_device(struct device *dev)
{
	struct sch5636_data *data = dev_get_drvdata(dev);
	struct sch5636_data *ret = data;
	int i, val;

	mutex_lock(&data->update_lock);

	/* Cache the values for 1 second */
	if (data->valid && !time_after(jiffies, data->last_updated + HZ))
		goto abort;

	for (i = 0; i < SCH5636_NO_INS; i++) {
		val = sch56xx_read_virtual_reg(data->addr,
					       SCH5636_REG_IN_VAL[i]);
		if (unlikely(val < 0)) {
			ret = ERR_PTR(val);
			goto abort;
		}
		data->in[i] = val;
	}

	for (i = 0; i < SCH5636_NO_TEMPS; i++) {
		if (data->temp_ctrl[i] & SCH5636_TEMP_DEACTIVATED)
			continue;

		val = sch56xx_read_virtual_reg(data->addr,
					       SCH5636_REG_TEMP_VAL[i]);
		if (unlikely(val < 0)) {
			ret = ERR_PTR(val);
			goto abort;
		}
		data->temp_val[i] = val;

		val = sch56xx_read_virtual_reg(data->addr,
					       SCH5636_REG_TEMP_CTRL(i));
		if (unlikely(val < 0)) {
			ret = ERR_PTR(val);
			goto abort;
		}
		data->temp_ctrl[i] = val;
		/* Alarms need to be explicitly write-cleared */
		if (val & SCH5636_TEMP_ALARM) {
			sch56xx_write_virtual_reg(data->addr,
						SCH5636_REG_TEMP_CTRL(i), val);
		}
	}

	for (i = 0; i < SCH5636_NO_FANS; i++) {
		if (data->fan_ctrl[i] & SCH5636_FAN_DEACTIVATED)
			continue;

		val = sch56xx_read_virtual_reg16(data->addr,
						 SCH5636_REG_FAN_VAL[i]);
		if (unlikely(val < 0)) {
			ret = ERR_PTR(val);
			goto abort;
		}
		data->fan_val[i] = val;

		val = sch56xx_read_virtual_reg(data->addr,
					       SCH5636_REG_FAN_CTRL(i));
		if (unlikely(val < 0)) {
			ret = ERR_PTR(val);
			goto abort;
		}
		data->fan_ctrl[i] = val;
		/* Alarms need to be explicitly write-cleared */
		if (val & SCH5636_FAN_ALARM) {
			sch56xx_write_virtual_reg(data->addr,
						SCH5636_REG_FAN_CTRL(i), val);
		}
	}

	data->last_updated = jiffies;
	data->valid = 1;
abort:
	mutex_unlock(&data->update_lock);
	return ret;
}

static int reg_to_rpm(u16 reg)
{
	if (reg == 0)
		return -EIO;
	if (reg == 0xffff)
		return 0;

	return 5400540 / reg;
}

static ssize_t name_show(struct device *dev, struct device_attribute *devattr,
			 char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
}

static ssize_t in_value_show(struct device *dev,
			     struct device_attribute *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct sch5636_data *data = sch5636_update_device(dev);
	int val;

	if (IS_ERR(data))
		return PTR_ERR(data);

	val = DIV_ROUND_CLOSEST(
		data->in[attr->index] * SCH5636_REG_IN_FACTORS[attr->index],
		255);
	return snprintf(buf, PAGE_SIZE, "%d\n", val);
}

static ssize_t in_label_show(struct device *dev,
			     struct device_attribute *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

	return snprintf(buf, PAGE_SIZE, "%s\n",
			SCH5636_IN_LABELS[attr->index]);
}

static ssize_t temp_value_show(struct device *dev,
			       struct device_attribute *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct sch5636_data *data = sch5636_update_device(dev);
	int val;

	if (IS_ERR(data))
		return PTR_ERR(data);

	val = (data->temp_val[attr->index] - 64) * 1000;
	return snprintf(buf, PAGE_SIZE, "%d\n", val);
}

static ssize_t temp_fault_show(struct device *dev,
			       struct device_attribute *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct sch5636_data *data = sch5636_update_device(dev);
	int val;

	if (IS_ERR(data))
		return PTR_ERR(data);

	val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_WORKING) ? 0 : 1;
	return snprintf(buf, PAGE_SIZE, "%d\n", val);
}

static ssize_t temp_alarm_show(struct device *dev,
			       struct device_attribute *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct sch5636_data *data = sch5636_update_device(dev);
	int val;

	if (IS_ERR(data))
		return PTR_ERR(data);

	val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_ALARM) ? 1 : 0;
	return snprintf(buf, PAGE_SIZE, "%d\n", val);
}

static ssize_t fan_value_show(struct device *dev,
			      struct device_attribute *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct sch5636_data *data = sch5636_update_device(dev);
	int val;

	if (IS_ERR(data))
		return PTR_ERR(data);

	val = reg_to_rpm(data->fan_val[attr->index]);
	if (val < 0)
		return val;

	return snprintf(buf, PAGE_SIZE, "%d\n", val);
}

static ssize_t fan_fault_show(struct device *dev,
			      struct device_attribute *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct sch5636_data *data = sch5636_update_device(dev);
	int val;

	if (IS_ERR(data))
		return PTR_ERR(data);

	val = (data->fan_ctrl[attr->index] & SCH5636_FAN_NOT_PRESENT) ? 1 : 0;
	return snprintf(buf, PAGE_SIZE, "%d\n", val);
}

static ssize_t fan_alarm_show(struct device *dev,
			      struct device_attribute *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct sch5636_data *data = sch5636_update_device(dev);
	int val;

	if (IS_ERR(data))
		return PTR_ERR(data);

	val = (data->fan_ctrl[attr->index] & SCH5636_FAN_ALARM) ? 1 : 0;
	return snprintf(buf, PAGE_SIZE, "%d\n", val);
}

static struct sensor_device_attribute sch5636_attr[] = {
	SENSOR_ATTR_RO(name, name, 0),
	SENSOR_ATTR_RO(in0_input, in_value, 0),
	SENSOR_ATTR_RO(in0_label, in_label, 0),
	SENSOR_ATTR_RO(in1_input, in_value, 1),
	SENSOR_ATTR_RO(in1_label, in_label, 1),
	SENSOR_ATTR_RO(in2_input, in_value, 2),
	SENSOR_ATTR_RO(in2_label, in_label, 2),
	SENSOR_ATTR_RO(in3_input, in_value, 3),
	SENSOR_ATTR_RO(in3_label, in_label, 3),
	SENSOR_ATTR_RO(in4_input, in_value, 4),
	SENSOR_ATTR_RO(in4_label, in_label, 4),
};

static struct sensor_device_attribute sch5636_temp_attr[] = {
	SENSOR_ATTR_RO(temp1_input, temp_value, 0),
	SENSOR_ATTR_RO(temp1_fault, temp_fault, 0),
	SENSOR_ATTR_RO(temp1_alarm, temp_alarm, 0),
	SENSOR_ATTR_RO(temp2_input, temp_value, 1),
	SENSOR_ATTR_RO(temp2_fault, temp_fault, 1),
	SENSOR_ATTR_RO(temp2_alarm, temp_alarm, 1),
	SENSOR_ATTR_RO(temp3_input, temp_value, 2),
	SENSOR_ATTR_RO(temp3_fault, temp_fault, 2),
	SENSOR_ATTR_RO(temp3_alarm, temp_alarm, 2),
	SENSOR_ATTR_RO(temp4_input, temp_value, 3),
	SENSOR_ATTR_RO(temp4_fault, temp_fault, 3),
	SENSOR_ATTR_RO(temp4_alarm, temp_alarm, 3),
	SENSOR_ATTR_RO(temp5_input, temp_value, 4),
	SENSOR_ATTR_RO(temp5_fault, temp_fault, 4),
	SENSOR_ATTR_RO(temp5_alarm, temp_alarm, 4),
	SENSOR_ATTR_RO(temp6_input, temp_value, 5),
	SENSOR_ATTR_RO(temp6_fault, temp_fault, 5),
	SENSOR_ATTR_RO(temp6_alarm, temp_alarm, 5),
	SENSOR_ATTR_RO(temp7_input, temp_value, 6),
	SENSOR_ATTR_RO(temp7_fault, temp_fault, 6),
	SENSOR_ATTR_RO(temp7_alarm, temp_alarm, 6),
	SENSOR_ATTR_RO(temp8_input, temp_value, 7),
	SENSOR_ATTR_RO(temp8_fault, temp_fault, 7),
	SENSOR_ATTR_RO(temp8_alarm, temp_alarm, 7),
	SENSOR_ATTR_RO(temp9_input, temp_value, 8),
	SENSOR_ATTR_RO(temp9_fault, temp_fault, 8),
	SENSOR_ATTR_RO(temp9_alarm, temp_alarm, 8),
	SENSOR_ATTR_RO(temp10_input, temp_value, 9),
	SENSOR_ATTR_RO(temp10_fault, temp_fault, 9),
	SENSOR_ATTR_RO(temp10_alarm, temp_alarm, 9),
	SENSOR_ATTR_RO(temp11_input, temp_value, 10),
	SENSOR_ATTR_RO(temp11_fault, temp_fault, 10),
	SENSOR_ATTR_RO(temp11_alarm, temp_alarm, 10),
	SENSOR_ATTR_RO(temp12_input, temp_value, 11),
	SENSOR_ATTR_RO(temp12_fault, temp_fault, 11),
	SENSOR_ATTR_RO(temp12_alarm, temp_alarm, 11),
	SENSOR_ATTR_RO(temp13_input, temp_value, 12),
	SENSOR_ATTR_RO(temp13_fault, temp_fault, 12),
	SENSOR_ATTR_RO(temp13_alarm, temp_alarm, 12),
	SENSOR_ATTR_RO(temp14_input, temp_value, 13),
	SENSOR_ATTR_RO(temp14_fault, temp_fault, 13),
	SENSOR_ATTR_RO(temp14_alarm, temp_alarm, 13),
	SENSOR_ATTR_RO(temp15_input, temp_value, 14),
	SENSOR_ATTR_RO(temp15_fault, temp_fault, 14),
	SENSOR_ATTR_RO(temp15_alarm, temp_alarm, 14),
	SENSOR_ATTR_RO(temp16_input, temp_value, 15),
	SENSOR_ATTR_RO(temp16_fault, temp_fault, 15),
	SENSOR_ATTR_RO(temp16_alarm, temp_alarm, 15),
};

static struct sensor_device_attribute sch5636_fan_attr[] = {
	SENSOR_ATTR_RO(fan1_input, fan_value, 0),
	SENSOR_ATTR_RO(fan1_fault, fan_fault, 0),
	SENSOR_ATTR_RO(fan1_alarm, fan_alarm, 0),
	SENSOR_ATTR_RO(fan2_input, fan_value, 1),
	SENSOR_ATTR_RO(fan2_fault, fan_fault, 1),
	SENSOR_ATTR_RO(fan2_alarm, fan_alarm, 1),
	SENSOR_ATTR_RO(fan3_input, fan_value, 2),
	SENSOR_ATTR_RO(fan3_fault, fan_fault, 2),
	SENSOR_ATTR_RO(fan3_alarm, fan_alarm, 2),
	SENSOR_ATTR_RO(fan4_input, fan_value, 3),
	SENSOR_ATTR_RO(fan4_fault, fan_fault, 3),
	SENSOR_ATTR_RO(fan4_alarm, fan_alarm, 3),
	SENSOR_ATTR_RO(fan5_input, fan_value, 4),
	SENSOR_ATTR_RO(fan5_fault, fan_fault, 4),
	SENSOR_ATTR_RO(fan5_alarm, fan_alarm, 4),
	SENSOR_ATTR_RO(fan6_input, fan_value, 5),
	SENSOR_ATTR_RO(fan6_fault, fan_fault, 5),
	SENSOR_ATTR_RO(fan6_alarm, fan_alarm, 5),
	SENSOR_ATTR_RO(fan7_input, fan_value, 6),
	SENSOR_ATTR_RO(fan7_fault, fan_fault, 6),
	SENSOR_ATTR_RO(fan7_alarm, fan_alarm, 6),
	SENSOR_ATTR_RO(fan8_input, fan_value, 7),
	SENSOR_ATTR_RO(fan8_fault, fan_fault, 7),
	SENSOR_ATTR_RO(fan8_alarm, fan_alarm, 7),
};

static int sch5636_remove(struct platform_device *pdev)
{
	struct sch5636_data *data = platform_get_drvdata(pdev);
	int i;

	if (data->watchdog)
		sch56xx_watchdog_unregister(data->watchdog);

	if (data->hwmon_dev)
		hwmon_device_unregister(data->hwmon_dev);

	for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++)
		device_remove_file(&pdev->dev, &sch5636_attr[i].dev_attr);

	for (i = 0; i < SCH5636_NO_TEMPS * 3; i++)
		device_remove_file(&pdev->dev,
				   &sch5636_temp_attr[i].dev_attr);

	for (i = 0; i < SCH5636_NO_FANS * 3; i++)
		device_remove_file(&pdev->dev,
				   &sch5636_fan_attr[i].dev_attr);

	return 0;
}

static int sch5636_probe(struct platform_device *pdev)
{
	struct sch5636_data *data;
	int i, err, val, revision[2];
	char id[4];

	data = devm_kzalloc(&pdev->dev, sizeof(struct sch5636_data),
			    GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
	mutex_init(&data->update_lock);
	platform_set_drvdata(pdev, data);

	for (i = 0; i < 3; i++) {
		val = sch56xx_read_virtual_reg(data->addr,
					       SCH5636_REG_FUJITSU_ID + i);
		if (val < 0) {
			pr_err("Could not read Fujitsu id byte at %#x\n",
				SCH5636_REG_FUJITSU_ID + i);
			err = val;
			goto error;
		}
		id[i] = val;
	}
	id[i] = '\0';

	if (strcmp(id, "THS")) {
		pr_err("Unknown Fujitsu id: %02x%02x%02x\n",
		       id[0], id[1], id[2]);
		err = -ENODEV;
		goto error;
	}

	for (i = 0; i < 2; i++) {
		val = sch56xx_read_virtual_reg(data->addr,
					       SCH5636_REG_FUJITSU_REV + i);
		if (val < 0) {
			err = val;
			goto error;
		}
		revision[i] = val;
	}
	pr_info("Found %s chip at %#hx, revision: %d.%02d\n", DEVNAME,
		data->addr, revision[0], revision[1]);

	/* Read all temp + fan ctrl registers to determine which are active */
	for (i = 0; i < SCH5636_NO_TEMPS; i++) {
		val = sch56xx_read_virtual_reg(data->addr,
					       SCH5636_REG_TEMP_CTRL(i));
		if (unlikely(val < 0)) {
			err = val;
			goto error;
		}
		data->temp_ctrl[i] = val;
	}

	for (i = 0; i < SCH5636_NO_FANS; i++) {
		val = sch56xx_read_virtual_reg(data->addr,
					       SCH5636_REG_FAN_CTRL(i));
		if (unlikely(val < 0)) {
			err = val;
			goto error;
		}
		data->fan_ctrl[i] = val;
	}

	for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++) {
		err = device_create_file(&pdev->dev,
					 &sch5636_attr[i].dev_attr);
		if (err)
			goto error;
	}

	for (i = 0; i < (SCH5636_NO_TEMPS * 3); i++) {
		if (data->temp_ctrl[i/3] & SCH5636_TEMP_DEACTIVATED)
			continue;

		err = device_create_file(&pdev->dev,
					&sch5636_temp_attr[i].dev_attr);
		if (err)
			goto error;
	}

	for (i = 0; i < (SCH5636_NO_FANS * 3); i++) {
		if (data->fan_ctrl[i/3] & SCH5636_FAN_DEACTIVATED)
			continue;

		err = device_create_file(&pdev->dev,
					&sch5636_fan_attr[i].dev_attr);
		if (err)
			goto error;
	}

	data->hwmon_dev = hwmon_device_register(&pdev->dev);
	if (IS_ERR(data->hwmon_dev)) {
		err = PTR_ERR(data->hwmon_dev);
		data->hwmon_dev = NULL;
		goto error;
	}

	/* Note failing to register the watchdog is not a fatal error */
	data->watchdog = sch56xx_watchdog_register(&pdev->dev, data->addr,
					(revision[0] << 8) | revision[1],
					&data->update_lock, 0);

	return 0;

error:
	sch5636_remove(pdev);
	return err;
}

static struct platform_driver sch5636_driver = {
	.driver = {
		.name	= DRVNAME,
	},
	.probe		= sch5636_probe,
	.remove		= sch5636_remove,
};

module_platform_driver(sch5636_driver);

MODULE_DESCRIPTION("SMSC SCH5636 Hardware Monitoring Driver");
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
0772a640	2	/***************************************************************************
312869ec	3	* Copyright (C) 2011-2012 Hans de Goede <hdegoede@redhat.com> *
0772a640	4	* *
0772a640 HG	5	***************************************************************************/
	6
	7	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	8
	9	#include <linux/module.h>
	10	#include <linux/init.h>
	11	#include <linux/slab.h>
	12	#include <linux/jiffies.h>
	13	#include <linux/platform_device.h>
	14	#include <linux/hwmon.h>
	15	#include <linux/hwmon-sysfs.h>
	16	#include <linux/err.h>
	17	#include <linux/mutex.h>
	18	#include "sch56xx-common.h"
	19
	20	#define DRVNAME "sch5636"
	21	#define DEVNAME "theseus" /* We only support one model for now */
	22
	23	#define SCH5636_REG_FUJITSU_ID 0x780
	24	#define SCH5636_REG_FUJITSU_REV 0x783
	25
	26	#define SCH5636_NO_INS 5
	27	#define SCH5636_NO_TEMPS 16
	28	#define SCH5636_NO_FANS 8
	29
	30	static const u16 SCH5636_REG_IN_VAL[SCH5636_NO_INS] = {
	31	0x22, 0x23, 0x24, 0x25, 0x189 };
	32	static const u16 SCH5636_REG_IN_FACTORS[SCH5636_NO_INS] = {
	33	4400, 1500, 4000, 4400, 16000 };
	34	static const char * const SCH5636_IN_LABELS[SCH5636_NO_INS] = {
	35	"3.3V", "VREF", "VBAT", "3.3AUX", "12V" };
	36
	37	static const u16 SCH5636_REG_TEMP_VAL[SCH5636_NO_TEMPS] = {
	38	0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181,
	39	0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C };
	40	#define SCH5636_REG_TEMP_CTRL(i) (0x790 + (i))
	41	#define SCH5636_TEMP_WORKING 0x01
	42	#define SCH5636_TEMP_ALARM 0x02
	43	#define SCH5636_TEMP_DEACTIVATED 0x80
	44
	45	static const u16 SCH5636_REG_FAN_VAL[SCH5636_NO_FANS] = {
	46	0x2C, 0x2E, 0x30, 0x32, 0x62, 0x64, 0x66, 0x68 };
	47	#define SCH5636_REG_FAN_CTRL(i) (0x880 + (i))
	48	/* FAULT in datasheet, but acts as an alarm */
	49	#define SCH5636_FAN_ALARM 0x04
	50	#define SCH5636_FAN_NOT_PRESENT 0x08
	51	#define SCH5636_FAN_DEACTIVATED 0x80
	52
	53
	54	struct sch5636_data {
	55	unsigned short addr;
	56	struct device *hwmon_dev;
312869ec	57	struct sch56xx_watchdog_data *watchdog;
0772a640 HG	58
	59	struct mutex update_lock;
	60	char valid; /* !=0 if following fields are valid */
	61	unsigned long last_updated; /* In jiffies */
	62	u8 in[SCH5636_NO_INS];
	63	u8 temp_val[SCH5636_NO_TEMPS];
	64	u8 temp_ctrl[SCH5636_NO_TEMPS];
	65	u16 fan_val[SCH5636_NO_FANS];
	66	u8 fan_ctrl[SCH5636_NO_FANS];
	67	};
	68
	69	static struct sch5636_data sch5636_update_device(struct device dev)
	70	{
	71	struct sch5636_data *data = dev_get_drvdata(dev);
	72	struct sch5636_data *ret = data;
	73	int i, val;
	74
	75	mutex_lock(&data->update_lock);
	76
	77	/* Cache the values for 1 second */
	78	if (data->valid && !time_after(jiffies, data->last_updated + HZ))
	79	goto abort;
	80
	81	for (i = 0; i < SCH5636_NO_INS; i++) {
	82	val = sch56xx_read_virtual_reg(data->addr,
	83	SCH5636_REG_IN_VAL[i]);
	84	if (unlikely(val < 0)) {
	85	ret = ERR_PTR(val);
	86	goto abort;
	87	}
	88	data->in[i] = val;
	89	}
	90
	91	for (i = 0; i < SCH5636_NO_TEMPS; i++) {
	92	if (data->temp_ctrl[i] & SCH5636_TEMP_DEACTIVATED)
	93	continue;
	94
	95	val = sch56xx_read_virtual_reg(data->addr,
	96	SCH5636_REG_TEMP_VAL[i]);
	97	if (unlikely(val < 0)) {
	98	ret = ERR_PTR(val);
	99	goto abort;
	100	}
	101	data->temp_val[i] = val;
	102
	103	val = sch56xx_read_virtual_reg(data->addr,
	104	SCH5636_REG_TEMP_CTRL(i));
	105	if (unlikely(val < 0)) {
	106	ret = ERR_PTR(val);
	107	goto abort;
	108	}
	109	data->temp_ctrl[i] = val;
	110	/* Alarms need to be explicitly write-cleared */
	111	if (val & SCH5636_TEMP_ALARM) {
	112	sch56xx_write_virtual_reg(data->addr,
	113	SCH5636_REG_TEMP_CTRL(i), val);
	114	}
	115	}
	116
	117	for (i = 0; i < SCH5636_NO_FANS; i++) {
	118	if (data->fan_ctrl[i] & SCH5636_FAN_DEACTIVATED)
	119	continue;
	120
	121	val = sch56xx_read_virtual_reg16(data->addr,
122	SCH5636_REG_FAN_VAL[i]);
123	if (unlikely(val < 0)) {
124	ret = ERR_PTR(val);
125	goto abort;
126	}
127	data->fan_val[i] = val;
128
129	val = sch56xx_read_virtual_reg(data->addr,
130	SCH5636_REG_FAN_CTRL(i));
131	if (unlikely(val < 0)) {
132	ret = ERR_PTR(val);
133	goto abort;
134	}
135	data->fan_ctrl[i] = val;
136	/* Alarms need to be explicitly write-cleared */
137	if (val & SCH5636_FAN_ALARM) {
138	sch56xx_write_virtual_reg(data->addr,
139	SCH5636_REG_FAN_CTRL(i), val);
140	}
141	}
142
143	data->last_updated = jiffies;
144	data->valid = 1;
145	abort:
146	mutex_unlock(&data->update_lock);
147	return ret;
148	}
149
150	static int reg_to_rpm(u16 reg)
151	{
152	if (reg == 0)
153	return -EIO;
154	if (reg == 0xffff)
155	return 0;
156
157	return 5400540 / reg;
158	}
159
80c6b121 GR	160	static ssize_t name_show(struct device dev, struct device_attribute devattr,
80c6b121 GR	161	char *buf)
0772a640 HG	162	{
	163	return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
	164	}
	165
80c6b121 GR	166	static ssize_t in_value_show(struct device *dev,
80c6b121 GR	167	struct device_attribute devattr, char buf)
0772a640 HG	168	{
	169	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	170	struct sch5636_data *data = sch5636_update_device(dev);
	171	int val;
	172
	173	if (IS_ERR(data))
	174	return PTR_ERR(data);
	175
	176	val = DIV_ROUND_CLOSEST(
	177	data->in[attr->index] * SCH5636_REG_IN_FACTORS[attr->index],
	178	255);
	179	return snprintf(buf, PAGE_SIZE, "%d\n", val);
	180	}
	181
80c6b121 GR	182	static ssize_t in_label_show(struct device *dev,
80c6b121 GR	183	struct device_attribute devattr, char buf)
0772a640 HG	184	{
	185	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	186
	187	return snprintf(buf, PAGE_SIZE, "%s\n",
	188	SCH5636_IN_LABELS[attr->index]);
	189	}
	190
80c6b121 GR	191	static ssize_t temp_value_show(struct device *dev,
80c6b121 GR	192	struct device_attribute devattr, char buf)
0772a640 HG	193	{
	194	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	195	struct sch5636_data *data = sch5636_update_device(dev);
	196	int val;
	197
	198	if (IS_ERR(data))
	199	return PTR_ERR(data);
	200
	201	val = (data->temp_val[attr->index] - 64) * 1000;
	202	return snprintf(buf, PAGE_SIZE, "%d\n", val);
	203	}
	204
80c6b121 GR	205	static ssize_t temp_fault_show(struct device *dev,
80c6b121 GR	206	struct device_attribute devattr, char buf)
0772a640 HG	207	{
	208	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	209	struct sch5636_data *data = sch5636_update_device(dev);
	210	int val;
	211
	212	if (IS_ERR(data))
	213	return PTR_ERR(data);
	214
	215	val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_WORKING) ? 0 : 1;
	216	return snprintf(buf, PAGE_SIZE, "%d\n", val);
	217	}
	218
80c6b121 GR	219	static ssize_t temp_alarm_show(struct device *dev,
80c6b121 GR	220	struct device_attribute devattr, char buf)
0772a640 HG	221	{
	222	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	223	struct sch5636_data *data = sch5636_update_device(dev);
	224	int val;
	225
	226	if (IS_ERR(data))
	227	return PTR_ERR(data);
	228
	229	val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_ALARM) ? 1 : 0;
	230	return snprintf(buf, PAGE_SIZE, "%d\n", val);
	231	}
	232
80c6b121 GR	233	static ssize_t fan_value_show(struct device *dev,
80c6b121 GR	234	struct device_attribute devattr, char buf)
0772a640 HG	235	{
	236	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	237	struct sch5636_data *data = sch5636_update_device(dev);
	238	int val;
	239
	240	if (IS_ERR(data))
	241	return PTR_ERR(data);
	242
	243	val = reg_to_rpm(data->fan_val[attr->index]);
	244	if (val < 0)
	245	return val;
	246
	247	return snprintf(buf, PAGE_SIZE, "%d\n", val);
	248	}
	249
80c6b121 GR	250	static ssize_t fan_fault_show(struct device *dev,
80c6b121 GR	251	struct device_attribute devattr, char buf)
0772a640 HG	252	{
	253	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	254	struct sch5636_data *data = sch5636_update_device(dev);
	255	int val;
	256
	257	if (IS_ERR(data))
	258	return PTR_ERR(data);
	259
	260	val = (data->fan_ctrl[attr->index] & SCH5636_FAN_NOT_PRESENT) ? 1 : 0;
	261	return snprintf(buf, PAGE_SIZE, "%d\n", val);
	262	}
	263
80c6b121 GR	264	static ssize_t fan_alarm_show(struct device *dev,
80c6b121 GR	265	struct device_attribute devattr, char buf)
0772a640 HG	266	{
	267	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	268	struct sch5636_data *data = sch5636_update_device(dev);
	269	int val;
	270
	271	if (IS_ERR(data))
	272	return PTR_ERR(data);
	273
	274	val = (data->fan_ctrl[attr->index] & SCH5636_FAN_ALARM) ? 1 : 0;
	275	return snprintf(buf, PAGE_SIZE, "%d\n", val);
	276	}
	277
	278	static struct sensor_device_attribute sch5636_attr[] = {
80c6b121 GR	279	SENSOR_ATTR_RO(name, name, 0),
	280	SENSOR_ATTR_RO(in0_input, in_value, 0),
	281	SENSOR_ATTR_RO(in0_label, in_label, 0),
	282	SENSOR_ATTR_RO(in1_input, in_value, 1),
	283	SENSOR_ATTR_RO(in1_label, in_label, 1),
	284	SENSOR_ATTR_RO(in2_input, in_value, 2),
	285	SENSOR_ATTR_RO(in2_label, in_label, 2),
	286	SENSOR_ATTR_RO(in3_input, in_value, 3),
	287	SENSOR_ATTR_RO(in3_label, in_label, 3),
	288	SENSOR_ATTR_RO(in4_input, in_value, 4),
	289	SENSOR_ATTR_RO(in4_label, in_label, 4),
0772a640 HG	290	};
	291
	292	static struct sensor_device_attribute sch5636_temp_attr[] = {
80c6b121 GR	293	SENSOR_ATTR_RO(temp1_input, temp_value, 0),
	294	SENSOR_ATTR_RO(temp1_fault, temp_fault, 0),
	295	SENSOR_ATTR_RO(temp1_alarm, temp_alarm, 0),
	296	SENSOR_ATTR_RO(temp2_input, temp_value, 1),
	297	SENSOR_ATTR_RO(temp2_fault, temp_fault, 1),
	298	SENSOR_ATTR_RO(temp2_alarm, temp_alarm, 1),
	299	SENSOR_ATTR_RO(temp3_input, temp_value, 2),
	300	SENSOR_ATTR_RO(temp3_fault, temp_fault, 2),
	301	SENSOR_ATTR_RO(temp3_alarm, temp_alarm, 2),
	302	SENSOR_ATTR_RO(temp4_input, temp_value, 3),
	303	SENSOR_ATTR_RO(temp4_fault, temp_fault, 3),
	304	SENSOR_ATTR_RO(temp4_alarm, temp_alarm, 3),
	305	SENSOR_ATTR_RO(temp5_input, temp_value, 4),
	306	SENSOR_ATTR_RO(temp5_fault, temp_fault, 4),
	307	SENSOR_ATTR_RO(temp5_alarm, temp_alarm, 4),
	308	SENSOR_ATTR_RO(temp6_input, temp_value, 5),
	309	SENSOR_ATTR_RO(temp6_fault, temp_fault, 5),
	310	SENSOR_ATTR_RO(temp6_alarm, temp_alarm, 5),
	311	SENSOR_ATTR_RO(temp7_input, temp_value, 6),
	312	SENSOR_ATTR_RO(temp7_fault, temp_fault, 6),
	313	SENSOR_ATTR_RO(temp7_alarm, temp_alarm, 6),
	314	SENSOR_ATTR_RO(temp8_input, temp_value, 7),
	315	SENSOR_ATTR_RO(temp8_fault, temp_fault, 7),
	316	SENSOR_ATTR_RO(temp8_alarm, temp_alarm, 7),
	317	SENSOR_ATTR_RO(temp9_input, temp_value, 8),
	318	SENSOR_ATTR_RO(temp9_fault, temp_fault, 8),
	319	SENSOR_ATTR_RO(temp9_alarm, temp_alarm, 8),
	320	SENSOR_ATTR_RO(temp10_input, temp_value, 9),
	321	SENSOR_ATTR_RO(temp10_fault, temp_fault, 9),
	322	SENSOR_ATTR_RO(temp10_alarm, temp_alarm, 9),
	323	SENSOR_ATTR_RO(temp11_input, temp_value, 10),
	324	SENSOR_ATTR_RO(temp11_fault, temp_fault, 10),
	325	SENSOR_ATTR_RO(temp11_alarm, temp_alarm, 10),
	326	SENSOR_ATTR_RO(temp12_input, temp_value, 11),
	327	SENSOR_ATTR_RO(temp12_fault, temp_fault, 11),
	328	SENSOR_ATTR_RO(temp12_alarm, temp_alarm, 11),
	329	SENSOR_ATTR_RO(temp13_input, temp_value, 12),
	330	SENSOR_ATTR_RO(temp13_fault, temp_fault, 12),
	331	SENSOR_ATTR_RO(temp13_alarm, temp_alarm, 12),
	332	SENSOR_ATTR_RO(temp14_input, temp_value, 13),
	333	SENSOR_ATTR_RO(temp14_fault, temp_fault, 13),
	334	SENSOR_ATTR_RO(temp14_alarm, temp_alarm, 13),
	335	SENSOR_ATTR_RO(temp15_input, temp_value, 14),
	336	SENSOR_ATTR_RO(temp15_fault, temp_fault, 14),
	337	SENSOR_ATTR_RO(temp15_alarm, temp_alarm, 14),
	338	SENSOR_ATTR_RO(temp16_input, temp_value, 15),
	339	SENSOR_ATTR_RO(temp16_fault, temp_fault, 15),
	340	SENSOR_ATTR_RO(temp16_alarm, temp_alarm, 15),
0772a640 HG	341	};
	342
	343	static struct sensor_device_attribute sch5636_fan_attr[] = {
80c6b121 GR	344	SENSOR_ATTR_RO(fan1_input, fan_value, 0),
	345	SENSOR_ATTR_RO(fan1_fault, fan_fault, 0),
	346	SENSOR_ATTR_RO(fan1_alarm, fan_alarm, 0),
	347	SENSOR_ATTR_RO(fan2_input, fan_value, 1),
	348	SENSOR_ATTR_RO(fan2_fault, fan_fault, 1),
	349	SENSOR_ATTR_RO(fan2_alarm, fan_alarm, 1),
	350	SENSOR_ATTR_RO(fan3_input, fan_value, 2),
	351	SENSOR_ATTR_RO(fan3_fault, fan_fault, 2),
	352	SENSOR_ATTR_RO(fan3_alarm, fan_alarm, 2),
	353	SENSOR_ATTR_RO(fan4_input, fan_value, 3),
	354	SENSOR_ATTR_RO(fan4_fault, fan_fault, 3),
	355	SENSOR_ATTR_RO(fan4_alarm, fan_alarm, 3),
	356	SENSOR_ATTR_RO(fan5_input, fan_value, 4),
	357	SENSOR_ATTR_RO(fan5_fault, fan_fault, 4),
	358	SENSOR_ATTR_RO(fan5_alarm, fan_alarm, 4),
	359	SENSOR_ATTR_RO(fan6_input, fan_value, 5),
	360	SENSOR_ATTR_RO(fan6_fault, fan_fault, 5),
	361	SENSOR_ATTR_RO(fan6_alarm, fan_alarm, 5),
	362	SENSOR_ATTR_RO(fan7_input, fan_value, 6),
	363	SENSOR_ATTR_RO(fan7_fault, fan_fault, 6),
	364	SENSOR_ATTR_RO(fan7_alarm, fan_alarm, 6),
	365	SENSOR_ATTR_RO(fan8_input, fan_value, 7),
	366	SENSOR_ATTR_RO(fan8_fault, fan_fault, 7),
	367	SENSOR_ATTR_RO(fan8_alarm, fan_alarm, 7),
0772a640 HG	368	};
	369
	370	static int sch5636_remove(struct platform_device *pdev)
	371	{
	372	struct sch5636_data *data = platform_get_drvdata(pdev);
	373	int i;
	374
312869ec HG	375	if (data->watchdog)
	376	sch56xx_watchdog_unregister(data->watchdog);
	377
0772a640 HG	378	if (data->hwmon_dev)
	379	hwmon_device_unregister(data->hwmon_dev);
	380
	381	for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++)
	382	device_remove_file(&pdev->dev, &sch5636_attr[i].dev_attr);
	383
	384	for (i = 0; i < SCH5636_NO_TEMPS * 3; i++)
	385	device_remove_file(&pdev->dev,
	386	&sch5636_temp_attr[i].dev_attr);
	387
	388	for (i = 0; i < SCH5636_NO_FANS * 3; i++)
	389	device_remove_file(&pdev->dev,
	390	&sch5636_fan_attr[i].dev_attr);
	391
0772a640 HG	392	return 0;
	393	}
	394
6c931ae1	395	static int sch5636_probe(struct platform_device *pdev)
0772a640 HG	396	{
	397	struct sch5636_data *data;
	398	int i, err, val, revision[2];
	399	char id[4];
	400
9220f1e4 GR	401	data = devm_kzalloc(&pdev->dev, sizeof(struct sch5636_data),
9220f1e4 GR	402	GFP_KERNEL);
0772a640 HG	403	if (!data)
	404	return -ENOMEM;
	405
	406	data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
	407	mutex_init(&data->update_lock);
	408	platform_set_drvdata(pdev, data);
	409
	410	for (i = 0; i < 3; i++) {
	411	val = sch56xx_read_virtual_reg(data->addr,
	412	SCH5636_REG_FUJITSU_ID + i);
	413	if (val < 0) {
	414	pr_err("Could not read Fujitsu id byte at %#x\n",
	415	SCH5636_REG_FUJITSU_ID + i);
	416	err = val;
	417	goto error;
	418	}
	419	id[i] = val;
	420	}
	421	id[i] = '\0';
	422
	423	if (strcmp(id, "THS")) {
	424	pr_err("Unknown Fujitsu id: %02x%02x%02x\n",
	425	id[0], id[1], id[2]);
	426	err = -ENODEV;
	427	goto error;
	428	}
	429
	430	for (i = 0; i < 2; i++) {
	431	val = sch56xx_read_virtual_reg(data->addr,
	432	SCH5636_REG_FUJITSU_REV + i);
	433	if (val < 0) {
	434	err = val;
	435	goto error;
	436	}
	437	revision[i] = val;
	438	}
d6a442df	439	pr_info("Found %s chip at %#hx, revision: %d.%02d\n", DEVNAME,
0772a640 HG	440	data->addr, revision[0], revision[1]);
	441
	442	/* Read all temp + fan ctrl registers to determine which are active */
	443	for (i = 0; i < SCH5636_NO_TEMPS; i++) {
	444	val = sch56xx_read_virtual_reg(data->addr,
	445	SCH5636_REG_TEMP_CTRL(i));
	446	if (unlikely(val < 0)) {
	447	err = val;
	448	goto error;
	449	}
	450	data->temp_ctrl[i] = val;
	451	}
	452
	453	for (i = 0; i < SCH5636_NO_FANS; i++) {
	454	val = sch56xx_read_virtual_reg(data->addr,
	455	SCH5636_REG_FAN_CTRL(i));
	456	if (unlikely(val < 0)) {
	457	err = val;
	458	goto error;
	459	}
	460	data->fan_ctrl[i] = val;
	461	}
	462
	463	for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++) {
	464	err = device_create_file(&pdev->dev,
	465	&sch5636_attr[i].dev_attr);
	466	if (err)
	467	goto error;
	468	}
	469
	470	for (i = 0; i < (SCH5636_NO_TEMPS * 3); i++) {
	471	if (data->temp_ctrl[i/3] & SCH5636_TEMP_DEACTIVATED)
	472	continue;
	473
	474	err = device_create_file(&pdev->dev,
	475	&sch5636_temp_attr[i].dev_attr);
	476	if (err)
	477	goto error;
	478	}
	479
	480	for (i = 0; i < (SCH5636_NO_FANS * 3); i++) {
	481	if (data->fan_ctrl[i/3] & SCH5636_FAN_DEACTIVATED)
	482	continue;
	483
	484	err = device_create_file(&pdev->dev,
	485	&sch5636_fan_attr[i].dev_attr);
	486	if (err)
	487	goto error;
	488	}
	489
	490	data->hwmon_dev = hwmon_device_register(&pdev->dev);
	491	if (IS_ERR(data->hwmon_dev)) {
	492	err = PTR_ERR(data->hwmon_dev);
	493	data->hwmon_dev = NULL;
	494	goto error;
	495	}
	496
312869ec	497	/* Note failing to register the watchdog is not a fatal error */
fb551405	498	data->watchdog = sch56xx_watchdog_register(&pdev->dev, data->addr,
312869ec HG	499	(revision[0] << 8) \| revision[1],
	500	&data->update_lock, 0);
	501
0772a640 HG	502	return 0;
	503
	504	error:
	505	sch5636_remove(pdev);
	506	return err;
	507	}
	508
	509	static struct platform_driver sch5636_driver = {
	510	.driver = {
0772a640 HG	511	.name = DRVNAME,
	512	},
	513	.probe = sch5636_probe,
	514	.remove = sch5636_remove,
	515	};
	516
25a236a5	517	module_platform_driver(sch5636_driver);
0772a640 HG	518
	519	MODULE_DESCRIPTION("SMSC SCH5636 Hardware Monitoring Driver");
	520	MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
	521	MODULE_LICENSE("GPL");