[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / hwmon / sch5636.c

/***************************************************************************
 *   Copyright (C) 2011-2012 Hans de Goede <hdegoede@redhat.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; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   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.             *
 ***************************************************************************/

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

static ssize_t show_in_value(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 show_in_label(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 show_temp_value(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 show_temp_fault(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 show_temp_alarm(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 show_fan_value(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 show_fan_fault(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 show_fan_alarm(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(name, 0444, show_name, NULL, 0),
	SENSOR_ATTR(in0_input, 0444, show_in_value, NULL, 0),
	SENSOR_ATTR(in0_label, 0444, show_in_label, NULL, 0),
	SENSOR_ATTR(in1_input, 0444, show_in_value, NULL, 1),
	SENSOR_ATTR(in1_label, 0444, show_in_label, NULL, 1),
	SENSOR_ATTR(in2_input, 0444, show_in_value, NULL, 2),
	SENSOR_ATTR(in2_label, 0444, show_in_label, NULL, 2),
	SENSOR_ATTR(in3_input, 0444, show_in_value, NULL, 3),
	SENSOR_ATTR(in3_label, 0444, show_in_label, NULL, 3),
	SENSOR_ATTR(in4_input, 0444, show_in_value, NULL, 4),
	SENSOR_ATTR(in4_label, 0444, show_in_label, NULL, 4),
};

static struct sensor_device_attribute sch5636_temp_attr[] = {
	SENSOR_ATTR(temp1_input, 0444, show_temp_value, NULL, 0),
	SENSOR_ATTR(temp1_fault, 0444, show_temp_fault, NULL, 0),
	SENSOR_ATTR(temp1_alarm, 0444, show_temp_alarm, NULL, 0),
	SENSOR_ATTR(temp2_input, 0444, show_temp_value, NULL, 1),
	SENSOR_ATTR(temp2_fault, 0444, show_temp_fault, NULL, 1),
	SENSOR_ATTR(temp2_alarm, 0444, show_temp_alarm, NULL, 1),
	SENSOR_ATTR(temp3_input, 0444, show_temp_value, NULL, 2),
	SENSOR_ATTR(temp3_fault, 0444, show_temp_fault, NULL, 2),
	SENSOR_ATTR(temp3_alarm, 0444, show_temp_alarm, NULL, 2),
	SENSOR_ATTR(temp4_input, 0444, show_temp_value, NULL, 3),
	SENSOR_ATTR(temp4_fault, 0444, show_temp_fault, NULL, 3),
	SENSOR_ATTR(temp4_alarm, 0444, show_temp_alarm, NULL, 3),
	SENSOR_ATTR(temp5_input, 0444, show_temp_value, NULL, 4),
	SENSOR_ATTR(temp5_fault, 0444, show_temp_fault, NULL, 4),
	SENSOR_ATTR(temp5_alarm, 0444, show_temp_alarm, NULL, 4),
	SENSOR_ATTR(temp6_input, 0444, show_temp_value, NULL, 5),
	SENSOR_ATTR(temp6_fault, 0444, show_temp_fault, NULL, 5),
	SENSOR_ATTR(temp6_alarm, 0444, show_temp_alarm, NULL, 5),
	SENSOR_ATTR(temp7_input, 0444, show_temp_value, NULL, 6),
	SENSOR_ATTR(temp7_fault, 0444, show_temp_fault, NULL, 6),
	SENSOR_ATTR(temp7_alarm, 0444, show_temp_alarm, NULL, 6),
	SENSOR_ATTR(temp8_input, 0444, show_temp_value, NULL, 7),
	SENSOR_ATTR(temp8_fault, 0444, show_temp_fault, NULL, 7),
	SENSOR_ATTR(temp8_alarm, 0444, show_temp_alarm, NULL, 7),
	SENSOR_ATTR(temp9_input, 0444, show_temp_value, NULL, 8),
	SENSOR_ATTR(temp9_fault, 0444, show_temp_fault, NULL, 8),
	SENSOR_ATTR(temp9_alarm, 0444, show_temp_alarm, NULL, 8),
	SENSOR_ATTR(temp10_input, 0444, show_temp_value, NULL, 9),
	SENSOR_ATTR(temp10_fault, 0444, show_temp_fault, NULL, 9),
	SENSOR_ATTR(temp10_alarm, 0444, show_temp_alarm, NULL, 9),
	SENSOR_ATTR(temp11_input, 0444, show_temp_value, NULL, 10),
	SENSOR_ATTR(temp11_fault, 0444, show_temp_fault, NULL, 10),
	SENSOR_ATTR(temp11_alarm, 0444, show_temp_alarm, NULL, 10),
	SENSOR_ATTR(temp12_input, 0444, show_temp_value, NULL, 11),
	SENSOR_ATTR(temp12_fault, 0444, show_temp_fault, NULL, 11),
	SENSOR_ATTR(temp12_alarm, 0444, show_temp_alarm, NULL, 11),
	SENSOR_ATTR(temp13_input, 0444, show_temp_value, NULL, 12),
	SENSOR_ATTR(temp13_fault, 0444, show_temp_fault, NULL, 12),
	SENSOR_ATTR(temp13_alarm, 0444, show_temp_alarm, NULL, 12),
	SENSOR_ATTR(temp14_input, 0444, show_temp_value, NULL, 13),
	SENSOR_ATTR(temp14_fault, 0444, show_temp_fault, NULL, 13),
	SENSOR_ATTR(temp14_alarm, 0444, show_temp_alarm, NULL, 13),
	SENSOR_ATTR(temp15_input, 0444, show_temp_value, NULL, 14),
	SENSOR_ATTR(temp15_fault, 0444, show_temp_fault, NULL, 14),
	SENSOR_ATTR(temp15_alarm, 0444, show_temp_alarm, NULL, 14),
	SENSOR_ATTR(temp16_input, 0444, show_temp_value, NULL, 15),
	SENSOR_ATTR(temp16_fault, 0444, show_temp_fault, NULL, 15),
	SENSOR_ATTR(temp16_alarm, 0444, show_temp_alarm, NULL, 15),
};

static struct sensor_device_attribute sch5636_fan_attr[] = {
	SENSOR_ATTR(fan1_input, 0444, show_fan_value, NULL, 0),
	SENSOR_ATTR(fan1_fault, 0444, show_fan_fault, NULL, 0),
	SENSOR_ATTR(fan1_alarm, 0444, show_fan_alarm, NULL, 0),
	SENSOR_ATTR(fan2_input, 0444, show_fan_value, NULL, 1),
	SENSOR_ATTR(fan2_fault, 0444, show_fan_fault, NULL, 1),
	SENSOR_ATTR(fan2_alarm, 0444, show_fan_alarm, NULL, 1),
	SENSOR_ATTR(fan3_input, 0444, show_fan_value, NULL, 2),
	SENSOR_ATTR(fan3_fault, 0444, show_fan_fault, NULL, 2),
	SENSOR_ATTR(fan3_alarm, 0444, show_fan_alarm, NULL, 2),
	SENSOR_ATTR(fan4_input, 0444, show_fan_value, NULL, 3),
	SENSOR_ATTR(fan4_fault, 0444, show_fan_fault, NULL, 3),
	SENSOR_ATTR(fan4_alarm, 0444, show_fan_alarm, NULL, 3),
	SENSOR_ATTR(fan5_input, 0444, show_fan_value, NULL, 4),
	SENSOR_ATTR(fan5_fault, 0444, show_fan_fault, NULL, 4),
	SENSOR_ATTR(fan5_alarm, 0444, show_fan_alarm, NULL, 4),
	SENSOR_ATTR(fan6_input, 0444, show_fan_value, NULL, 5),
	SENSOR_ATTR(fan6_fault, 0444, show_fan_fault, NULL, 5),
	SENSOR_ATTR(fan6_alarm, 0444, show_fan_alarm, NULL, 5),
	SENSOR_ATTR(fan7_input, 0444, show_fan_value, NULL, 6),
	SENSOR_ATTR(fan7_fault, 0444, show_fan_fault, NULL, 6),
	SENSOR_ATTR(fan7_alarm, 0444, show_fan_alarm, NULL, 6),
	SENSOR_ATTR(fan8_input, 0444, show_fan_value, NULL, 7),
	SENSOR_ATTR(fan8_fault, 0444, show_fan_fault, NULL, 7),
	SENSOR_ATTR(fan8_alarm, 0444, show_fan_alarm, NULL, 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, revison: %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 = {
		.owner	= THIS_MODULE,
		.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
0772a640	1	/***************************************************************************
312869ec	2	* Copyright (C) 2011-2012 Hans de Goede <hdegoede@redhat.com> *
0772a640 HG	3	* *
	4	* This program is free software; you can redistribute it and/or modify *
	5	* it under the terms of the GNU General Public License as published by *
	6	* the Free Software Foundation; either version 2 of the License, or *
	7	* (at your option) any later version. *
	8	* *
	9	* This program is distributed in the hope that it will be useful, *
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
	12	* GNU General Public License for more details. *
	13	* *
	14	* You should have received a copy of the GNU General Public License *
	15	* along with this program; if not, write to the *
	16	* Free Software Foundation, Inc., *
	17	* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
	18	***************************************************************************/
	19
	20	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	21
	22	#include <linux/module.h>
	23	#include <linux/init.h>
	24	#include <linux/slab.h>
	25	#include <linux/jiffies.h>
	26	#include <linux/platform_device.h>
	27	#include <linux/hwmon.h>
	28	#include <linux/hwmon-sysfs.h>
	29	#include <linux/err.h>
	30	#include <linux/mutex.h>
	31	#include "sch56xx-common.h"
	32
	33	#define DRVNAME "sch5636"
	34	#define DEVNAME "theseus" /* We only support one model for now */
	35
	36	#define SCH5636_REG_FUJITSU_ID 0x780
	37	#define SCH5636_REG_FUJITSU_REV 0x783
	38
	39	#define SCH5636_NO_INS 5
	40	#define SCH5636_NO_TEMPS 16
	41	#define SCH5636_NO_FANS 8
	42
	43	static const u16 SCH5636_REG_IN_VAL[SCH5636_NO_INS] = {
	44	0x22, 0x23, 0x24, 0x25, 0x189 };
	45	static const u16 SCH5636_REG_IN_FACTORS[SCH5636_NO_INS] = {
	46	4400, 1500, 4000, 4400, 16000 };
	47	static const char * const SCH5636_IN_LABELS[SCH5636_NO_INS] = {
	48	"3.3V", "VREF", "VBAT", "3.3AUX", "12V" };
	49
	50	static const u16 SCH5636_REG_TEMP_VAL[SCH5636_NO_TEMPS] = {
	51	0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181,
	52	0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C };
	53	#define SCH5636_REG_TEMP_CTRL(i) (0x790 + (i))
	54	#define SCH5636_TEMP_WORKING 0x01
	55	#define SCH5636_TEMP_ALARM 0x02
	56	#define SCH5636_TEMP_DEACTIVATED 0x80
	57
	58	static const u16 SCH5636_REG_FAN_VAL[SCH5636_NO_FANS] = {
	59	0x2C, 0x2E, 0x30, 0x32, 0x62, 0x64, 0x66, 0x68 };
	60	#define SCH5636_REG_FAN_CTRL(i) (0x880 + (i))
	61	/* FAULT in datasheet, but acts as an alarm */
	62	#define SCH5636_FAN_ALARM 0x04
	63	#define SCH5636_FAN_NOT_PRESENT 0x08
	64	#define SCH5636_FAN_DEACTIVATED 0x80
	65
	66
67	struct sch5636_data {
68	unsigned short addr;
69	struct device *hwmon_dev;
312869ec	70	struct sch56xx_watchdog_data *watchdog;
0772a640 HG	71
	72	struct mutex update_lock;
	73	char valid; /* !=0 if following fields are valid */
	74	unsigned long last_updated; /* In jiffies */
	75	u8 in[SCH5636_NO_INS];
	76	u8 temp_val[SCH5636_NO_TEMPS];
	77	u8 temp_ctrl[SCH5636_NO_TEMPS];
	78	u16 fan_val[SCH5636_NO_FANS];
	79	u8 fan_ctrl[SCH5636_NO_FANS];
	80	};
	81
	82	static struct sch5636_data sch5636_update_device(struct device dev)
	83	{
	84	struct sch5636_data *data = dev_get_drvdata(dev);
	85	struct sch5636_data *ret = data;
	86	int i, val;
	87
	88	mutex_lock(&data->update_lock);
	89
	90	/* Cache the values for 1 second */
	91	if (data->valid && !time_after(jiffies, data->last_updated + HZ))
	92	goto abort;
	93
	94	for (i = 0; i < SCH5636_NO_INS; i++) {
	95	val = sch56xx_read_virtual_reg(data->addr,
	96	SCH5636_REG_IN_VAL[i]);
	97	if (unlikely(val < 0)) {
	98	ret = ERR_PTR(val);
	99	goto abort;
	100	}
	101	data->in[i] = val;
	102	}
	103
	104	for (i = 0; i < SCH5636_NO_TEMPS; i++) {
	105	if (data->temp_ctrl[i] & SCH5636_TEMP_DEACTIVATED)
	106	continue;
	107
	108	val = sch56xx_read_virtual_reg(data->addr,
	109	SCH5636_REG_TEMP_VAL[i]);
	110	if (unlikely(val < 0)) {
	111	ret = ERR_PTR(val);
	112	goto abort;
	113	}
	114	data->temp_val[i] = val;
	115
	116	val = sch56xx_read_virtual_reg(data->addr,
	117	SCH5636_REG_TEMP_CTRL(i));
	118	if (unlikely(val < 0)) {
	119	ret = ERR_PTR(val);
	120	goto abort;
	121	}
	122	data->temp_ctrl[i] = val;
	123	/* Alarms need to be explicitly write-cleared */
	124	if (val & SCH5636_TEMP_ALARM) {
	125	sch56xx_write_virtual_reg(data->addr,
	126	SCH5636_REG_TEMP_CTRL(i), val);
	127	}
	128	}
	129
	130	for (i = 0; i < SCH5636_NO_FANS; i++) {
	131	if (data->fan_ctrl[i] & SCH5636_FAN_DEACTIVATED)
	132	continue;
	133
	134	val = sch56xx_read_virtual_reg16(data->addr,
135	SCH5636_REG_FAN_VAL[i]);
136	if (unlikely(val < 0)) {
137	ret = ERR_PTR(val);
138	goto abort;
139	}
140	data->fan_val[i] = val;
141
142	val = sch56xx_read_virtual_reg(data->addr,
143	SCH5636_REG_FAN_CTRL(i));
144	if (unlikely(val < 0)) {
145	ret = ERR_PTR(val);
146	goto abort;
147	}
148	data->fan_ctrl[i] = val;
149	/* Alarms need to be explicitly write-cleared */
150	if (val & SCH5636_FAN_ALARM) {
151	sch56xx_write_virtual_reg(data->addr,
152	SCH5636_REG_FAN_CTRL(i), val);
153	}
154	}
155
156	data->last_updated = jiffies;
157	data->valid = 1;
158	abort:
159	mutex_unlock(&data->update_lock);
160	return ret;
161	}
162
163	static int reg_to_rpm(u16 reg)
164	{
165	if (reg == 0)
166	return -EIO;
167	if (reg == 0xffff)
168	return 0;
169
170	return 5400540 / reg;
171	}
172
173	static ssize_t show_name(struct device dev, struct device_attribute devattr,
174	char *buf)
175	{
176	return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
177	}
178
179	static ssize_t show_in_value(struct device *dev, struct device_attribute
180	devattr, char buf)
181	{
182	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
183	struct sch5636_data *data = sch5636_update_device(dev);
184	int val;
185
186	if (IS_ERR(data))
187	return PTR_ERR(data);
188
189	val = DIV_ROUND_CLOSEST(
190	data->in[attr->index] * SCH5636_REG_IN_FACTORS[attr->index],
191	255);
192	return snprintf(buf, PAGE_SIZE, "%d\n", val);
193	}
194
195	static ssize_t show_in_label(struct device *dev, struct device_attribute
196	devattr, char buf)
197	{
198	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
199
200	return snprintf(buf, PAGE_SIZE, "%s\n",
201	SCH5636_IN_LABELS[attr->index]);
202	}
203
204	static ssize_t show_temp_value(struct device *dev, struct device_attribute
205	devattr, char buf)
206	{
207	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
208	struct sch5636_data *data = sch5636_update_device(dev);
209	int val;
210
211	if (IS_ERR(data))
212	return PTR_ERR(data);
213
214	val = (data->temp_val[attr->index] - 64) * 1000;
215	return snprintf(buf, PAGE_SIZE, "%d\n", val);
216	}
217
218	static ssize_t show_temp_fault(struct device *dev, struct device_attribute
219	devattr, char buf)
220	{
221	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
222	struct sch5636_data *data = sch5636_update_device(dev);
223	int val;
224
225	if (IS_ERR(data))
226	return PTR_ERR(data);
227
228	val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_WORKING) ? 0 : 1;
229	return snprintf(buf, PAGE_SIZE, "%d\n", val);
230	}
231
232	static ssize_t show_temp_alarm(struct device *dev, struct device_attribute
233	devattr, char buf)
234	{
235	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
236	struct sch5636_data *data = sch5636_update_device(dev);
237	int val;
238
239	if (IS_ERR(data))
240	return PTR_ERR(data);
241
242	val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_ALARM) ? 1 : 0;
243	return snprintf(buf, PAGE_SIZE, "%d\n", val);
244	}
245
246	static ssize_t show_fan_value(struct device *dev, struct device_attribute
247	devattr, char buf)
248	{
249	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
250	struct sch5636_data *data = sch5636_update_device(dev);
251	int val;
252
253	if (IS_ERR(data))
254	return PTR_ERR(data);
255
256	val = reg_to_rpm(data->fan_val[attr->index]);
257	if (val < 0)
258	return val;
259
260	return snprintf(buf, PAGE_SIZE, "%d\n", val);
261	}
262
263	static ssize_t show_fan_fault(struct device *dev, struct device_attribute
264	devattr, char buf)
265	{
266	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
267	struct sch5636_data *data = sch5636_update_device(dev);
268	int val;
269
270	if (IS_ERR(data))
271	return PTR_ERR(data);
272
273	val = (data->fan_ctrl[attr->index] & SCH5636_FAN_NOT_PRESENT) ? 1 : 0;
274	return snprintf(buf, PAGE_SIZE, "%d\n", val);
275	}
276
277	static ssize_t show_fan_alarm(struct device *dev, struct device_attribute
278	devattr, char buf)
279	{
280	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
281	struct sch5636_data *data = sch5636_update_device(dev);
282	int val;
283
284	if (IS_ERR(data))
285	return PTR_ERR(data);
286
287	val = (data->fan_ctrl[attr->index] & SCH5636_FAN_ALARM) ? 1 : 0;
288	return snprintf(buf, PAGE_SIZE, "%d\n", val);
289	}
290
291	static struct sensor_device_attribute sch5636_attr[] = {
292	SENSOR_ATTR(name, 0444, show_name, NULL, 0),
293	SENSOR_ATTR(in0_input, 0444, show_in_value, NULL, 0),
294	SENSOR_ATTR(in0_label, 0444, show_in_label, NULL, 0),
295	SENSOR_ATTR(in1_input, 0444, show_in_value, NULL, 1),
296	SENSOR_ATTR(in1_label, 0444, show_in_label, NULL, 1),
297	SENSOR_ATTR(in2_input, 0444, show_in_value, NULL, 2),
298	SENSOR_ATTR(in2_label, 0444, show_in_label, NULL, 2),
299	SENSOR_ATTR(in3_input, 0444, show_in_value, NULL, 3),
300	SENSOR_ATTR(in3_label, 0444, show_in_label, NULL, 3),
301	SENSOR_ATTR(in4_input, 0444, show_in_value, NULL, 4),
302	SENSOR_ATTR(in4_label, 0444, show_in_label, NULL, 4),
303	};
304
305	static struct sensor_device_attribute sch5636_temp_attr[] = {
306	SENSOR_ATTR(temp1_input, 0444, show_temp_value, NULL, 0),
307	SENSOR_ATTR(temp1_fault, 0444, show_temp_fault, NULL, 0),
308	SENSOR_ATTR(temp1_alarm, 0444, show_temp_alarm, NULL, 0),
309	SENSOR_ATTR(temp2_input, 0444, show_temp_value, NULL, 1),
310	SENSOR_ATTR(temp2_fault, 0444, show_temp_fault, NULL, 1),
311	SENSOR_ATTR(temp2_alarm, 0444, show_temp_alarm, NULL, 1),
312	SENSOR_ATTR(temp3_input, 0444, show_temp_value, NULL, 2),
313	SENSOR_ATTR(temp3_fault, 0444, show_temp_fault, NULL, 2),
314	SENSOR_ATTR(temp3_alarm, 0444, show_temp_alarm, NULL, 2),
315	SENSOR_ATTR(temp4_input, 0444, show_temp_value, NULL, 3),
316	SENSOR_ATTR(temp4_fault, 0444, show_temp_fault, NULL, 3),
317	SENSOR_ATTR(temp4_alarm, 0444, show_temp_alarm, NULL, 3),
318	SENSOR_ATTR(temp5_input, 0444, show_temp_value, NULL, 4),
319	SENSOR_ATTR(temp5_fault, 0444, show_temp_fault, NULL, 4),
320	SENSOR_ATTR(temp5_alarm, 0444, show_temp_alarm, NULL, 4),
321	SENSOR_ATTR(temp6_input, 0444, show_temp_value, NULL, 5),
322	SENSOR_ATTR(temp6_fault, 0444, show_temp_fault, NULL, 5),
323	SENSOR_ATTR(temp6_alarm, 0444, show_temp_alarm, NULL, 5),
324	SENSOR_ATTR(temp7_input, 0444, show_temp_value, NULL, 6),
325	SENSOR_ATTR(temp7_fault, 0444, show_temp_fault, NULL, 6),
326	SENSOR_ATTR(temp7_alarm, 0444, show_temp_alarm, NULL, 6),
327	SENSOR_ATTR(temp8_input, 0444, show_temp_value, NULL, 7),
328	SENSOR_ATTR(temp8_fault, 0444, show_temp_fault, NULL, 7),
329	SENSOR_ATTR(temp8_alarm, 0444, show_temp_alarm, NULL, 7),
330	SENSOR_ATTR(temp9_input, 0444, show_temp_value, NULL, 8),
331	SENSOR_ATTR(temp9_fault, 0444, show_temp_fault, NULL, 8),
332	SENSOR_ATTR(temp9_alarm, 0444, show_temp_alarm, NULL, 8),
333	SENSOR_ATTR(temp10_input, 0444, show_temp_value, NULL, 9),
334	SENSOR_ATTR(temp10_fault, 0444, show_temp_fault, NULL, 9),
335	SENSOR_ATTR(temp10_alarm, 0444, show_temp_alarm, NULL, 9),
336	SENSOR_ATTR(temp11_input, 0444, show_temp_value, NULL, 10),
337	SENSOR_ATTR(temp11_fault, 0444, show_temp_fault, NULL, 10),
338	SENSOR_ATTR(temp11_alarm, 0444, show_temp_alarm, NULL, 10),
339	SENSOR_ATTR(temp12_input, 0444, show_temp_value, NULL, 11),
340	SENSOR_ATTR(temp12_fault, 0444, show_temp_fault, NULL, 11),
341	SENSOR_ATTR(temp12_alarm, 0444, show_temp_alarm, NULL, 11),
342	SENSOR_ATTR(temp13_input, 0444, show_temp_value, NULL, 12),
343	SENSOR_ATTR(temp13_fault, 0444, show_temp_fault, NULL, 12),
344	SENSOR_ATTR(temp13_alarm, 0444, show_temp_alarm, NULL, 12),
345	SENSOR_ATTR(temp14_input, 0444, show_temp_value, NULL, 13),
346	SENSOR_ATTR(temp14_fault, 0444, show_temp_fault, NULL, 13),
347	SENSOR_ATTR(temp14_alarm, 0444, show_temp_alarm, NULL, 13),
348	SENSOR_ATTR(temp15_input, 0444, show_temp_value, NULL, 14),
349	SENSOR_ATTR(temp15_fault, 0444, show_temp_fault, NULL, 14),
350	SENSOR_ATTR(temp15_alarm, 0444, show_temp_alarm, NULL, 14),
351	SENSOR_ATTR(temp16_input, 0444, show_temp_value, NULL, 15),
352	SENSOR_ATTR(temp16_fault, 0444, show_temp_fault, NULL, 15),
353	SENSOR_ATTR(temp16_alarm, 0444, show_temp_alarm, NULL, 15),
354	};
355
356	static struct sensor_device_attribute sch5636_fan_attr[] = {
357	SENSOR_ATTR(fan1_input, 0444, show_fan_value, NULL, 0),
358	SENSOR_ATTR(fan1_fault, 0444, show_fan_fault, NULL, 0),
359	SENSOR_ATTR(fan1_alarm, 0444, show_fan_alarm, NULL, 0),
360	SENSOR_ATTR(fan2_input, 0444, show_fan_value, NULL, 1),
361	SENSOR_ATTR(fan2_fault, 0444, show_fan_fault, NULL, 1),
362	SENSOR_ATTR(fan2_alarm, 0444, show_fan_alarm, NULL, 1),
363	SENSOR_ATTR(fan3_input, 0444, show_fan_value, NULL, 2),
364	SENSOR_ATTR(fan3_fault, 0444, show_fan_fault, NULL, 2),
365	SENSOR_ATTR(fan3_alarm, 0444, show_fan_alarm, NULL, 2),
366	SENSOR_ATTR(fan4_input, 0444, show_fan_value, NULL, 3),
367	SENSOR_ATTR(fan4_fault, 0444, show_fan_fault, NULL, 3),
368	SENSOR_ATTR(fan4_alarm, 0444, show_fan_alarm, NULL, 3),
369	SENSOR_ATTR(fan5_input, 0444, show_fan_value, NULL, 4),
370	SENSOR_ATTR(fan5_fault, 0444, show_fan_fault, NULL, 4),
371	SENSOR_ATTR(fan5_alarm, 0444, show_fan_alarm, NULL, 4),
372	SENSOR_ATTR(fan6_input, 0444, show_fan_value, NULL, 5),
373	SENSOR_ATTR(fan6_fault, 0444, show_fan_fault, NULL, 5),
374	SENSOR_ATTR(fan6_alarm, 0444, show_fan_alarm, NULL, 5),
375	SENSOR_ATTR(fan7_input, 0444, show_fan_value, NULL, 6),
376	SENSOR_ATTR(fan7_fault, 0444, show_fan_fault, NULL, 6),
377	SENSOR_ATTR(fan7_alarm, 0444, show_fan_alarm, NULL, 6),
378	SENSOR_ATTR(fan8_input, 0444, show_fan_value, NULL, 7),
379	SENSOR_ATTR(fan8_fault, 0444, show_fan_fault, NULL, 7),
380	SENSOR_ATTR(fan8_alarm, 0444, show_fan_alarm, NULL, 7),
381	};
382
383	static int sch5636_remove(struct platform_device *pdev)
384	{
385	struct sch5636_data *data = platform_get_drvdata(pdev);
386	int i;
387
312869ec HG	388	if (data->watchdog)
	389	sch56xx_watchdog_unregister(data->watchdog);
	390
0772a640 HG	391	if (data->hwmon_dev)
	392	hwmon_device_unregister(data->hwmon_dev);
	393
	394	for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++)
	395	device_remove_file(&pdev->dev, &sch5636_attr[i].dev_attr);
	396
	397	for (i = 0; i < SCH5636_NO_TEMPS * 3; i++)
	398	device_remove_file(&pdev->dev,
	399	&sch5636_temp_attr[i].dev_attr);
	400
	401	for (i = 0; i < SCH5636_NO_FANS * 3; i++)
	402	device_remove_file(&pdev->dev,
	403	&sch5636_fan_attr[i].dev_attr);
	404
0772a640 HG	405	return 0;
	406	}
	407
6c931ae1	408	static int sch5636_probe(struct platform_device *pdev)
0772a640 HG	409	{
	410	struct sch5636_data *data;
	411	int i, err, val, revision[2];
	412	char id[4];
	413
9220f1e4 GR	414	data = devm_kzalloc(&pdev->dev, sizeof(struct sch5636_data),
9220f1e4 GR	415	GFP_KERNEL);
0772a640 HG	416	if (!data)
	417	return -ENOMEM;
	418
	419	data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
	420	mutex_init(&data->update_lock);
	421	platform_set_drvdata(pdev, data);
	422
	423	for (i = 0; i < 3; i++) {
	424	val = sch56xx_read_virtual_reg(data->addr,
	425	SCH5636_REG_FUJITSU_ID + i);
	426	if (val < 0) {
	427	pr_err("Could not read Fujitsu id byte at %#x\n",
	428	SCH5636_REG_FUJITSU_ID + i);
	429	err = val;
	430	goto error;
	431	}
	432	id[i] = val;
	433	}
	434	id[i] = '\0';
	435
	436	if (strcmp(id, "THS")) {
	437	pr_err("Unknown Fujitsu id: %02x%02x%02x\n",
	438	id[0], id[1], id[2]);
	439	err = -ENODEV;
	440	goto error;
	441	}
	442
	443	for (i = 0; i < 2; i++) {
	444	val = sch56xx_read_virtual_reg(data->addr,
	445	SCH5636_REG_FUJITSU_REV + i);
	446	if (val < 0) {
	447	err = val;
	448	goto error;
	449	}
	450	revision[i] = val;
	451	}
	452	pr_info("Found %s chip at %#hx, revison: %d.%02d\n", DEVNAME,
	453	data->addr, revision[0], revision[1]);
	454
	455	/* Read all temp + fan ctrl registers to determine which are active */
	456	for (i = 0; i < SCH5636_NO_TEMPS; i++) {
	457	val = sch56xx_read_virtual_reg(data->addr,
	458	SCH5636_REG_TEMP_CTRL(i));
	459	if (unlikely(val < 0)) {
	460	err = val;
	461	goto error;
	462	}
	463	data->temp_ctrl[i] = val;
	464	}
	465
	466	for (i = 0; i < SCH5636_NO_FANS; i++) {
	467	val = sch56xx_read_virtual_reg(data->addr,
	468	SCH5636_REG_FAN_CTRL(i));
	469	if (unlikely(val < 0)) {
	470	err = val;
	471	goto error;
	472	}
	473	data->fan_ctrl[i] = val;
	474	}
	475
	476	for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++) {
	477	err = device_create_file(&pdev->dev,
	478	&sch5636_attr[i].dev_attr);
	479	if (err)
480	goto error;
481	}
482
483	for (i = 0; i < (SCH5636_NO_TEMPS * 3); i++) {
484	if (data->temp_ctrl[i/3] & SCH5636_TEMP_DEACTIVATED)
485	continue;
486
487	err = device_create_file(&pdev->dev,
488	&sch5636_temp_attr[i].dev_attr);
489	if (err)
490	goto error;
491	}
492
493	for (i = 0; i < (SCH5636_NO_FANS * 3); i++) {
494	if (data->fan_ctrl[i/3] & SCH5636_FAN_DEACTIVATED)
495	continue;
496
497	err = device_create_file(&pdev->dev,
498	&sch5636_fan_attr[i].dev_attr);
499	if (err)
500	goto error;
501	}
502
503	data->hwmon_dev = hwmon_device_register(&pdev->dev);
504	if (IS_ERR(data->hwmon_dev)) {
505	err = PTR_ERR(data->hwmon_dev);
506	data->hwmon_dev = NULL;
507	goto error;
508	}
509
312869ec	510	/* Note failing to register the watchdog is not a fatal error */
fb551405	511	data->watchdog = sch56xx_watchdog_register(&pdev->dev, data->addr,
312869ec HG	512	(revision[0] << 8) \| revision[1],
	513	&data->update_lock, 0);
	514
0772a640 HG	515	return 0;
	516
	517	error:
	518	sch5636_remove(pdev);
	519	return err;
	520	}
	521
	522	static struct platform_driver sch5636_driver = {
	523	.driver = {
	524	.owner = THIS_MODULE,
	525	.name = DRVNAME,
	526	},
	527	.probe = sch5636_probe,
	528	.remove = sch5636_remove,
	529	};
	530
25a236a5	531	module_platform_driver(sch5636_driver);
0772a640 HG	532
	533	MODULE_DESCRIPTION("SMSC SCH5636 Hardware Monitoring Driver");
	534	MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
	535	MODULE_LICENSE("GPL");