[mirror_ubuntu-jammy-kernel.git] / drivers / hwmon / sch5627.c

// SPDX-License-Identifier: GPL-2.0-or-later
/***************************************************************************
 *   Copyright (C) 2010-2012 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/err.h>
#include <linux/mutex.h>
#include "sch56xx-common.h"

#define DRVNAME "sch5627"
#define DEVNAME DRVNAME /* We only support one model */

#define SCH5627_HWMON_ID		0xa5
#define SCH5627_COMPANY_ID		0x5c
#define SCH5627_PRIMARY_ID		0xa0

#define SCH5627_REG_BUILD_CODE		0x39
#define SCH5627_REG_BUILD_ID		0x3a
#define SCH5627_REG_HWMON_ID		0x3c
#define SCH5627_REG_HWMON_REV		0x3d
#define SCH5627_REG_COMPANY_ID		0x3e
#define SCH5627_REG_PRIMARY_ID		0x3f
#define SCH5627_REG_CTRL		0x40

#define SCH5627_NO_TEMPS		8
#define SCH5627_NO_FANS			4
#define SCH5627_NO_IN			5

static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
	0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
	0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
	0, 0, 1, 1, 0, 0, 0, 1 };
static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
	0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
	0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };

static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
	0x2C, 0x2E, 0x30, 0x32 };
static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
	0x62, 0x64, 0x66, 0x68 };

static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
	0x22, 0x23, 0x24, 0x25, 0x189 };
static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
	0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
	1, 0, 1, 0, 1 };
static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
	10745, 3660, 9765, 10745, 3660 };
static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
	"VCC", "VTT", "VBAT", "VTR", "V_IN" };

struct sch5627_data {
	unsigned short addr;
	u8 control;
	u8 temp_max[SCH5627_NO_TEMPS];
	u8 temp_crit[SCH5627_NO_TEMPS];
	u16 fan_min[SCH5627_NO_FANS];

	struct mutex update_lock;
	unsigned long last_battery;	/* In jiffies */
	char temp_valid;		/* !=0 if following fields are valid */
	char fan_valid;
	char in_valid;
	unsigned long temp_last_updated;	/* In jiffies */
	unsigned long fan_last_updated;
	unsigned long in_last_updated;
	u16 temp[SCH5627_NO_TEMPS];
	u16 fan[SCH5627_NO_FANS];
	u16 in[SCH5627_NO_IN];
};

static int sch5627_update_temp(struct sch5627_data *data)
{
	int ret = 0;
	int i, val;

	mutex_lock(&data->update_lock);

	/* Cache the values for 1 second */
	if (time_after(jiffies, data->temp_last_updated + HZ) || !data->temp_valid) {
		for (i = 0; i < SCH5627_NO_TEMPS; i++) {
			val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_TEMP_MSB[i],
							 SCH5627_REG_TEMP_LSN[i],
							 SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
			if (unlikely(val < 0)) {
				ret = val;
				goto abort;
			}
			data->temp[i] = val;
		}
		data->temp_last_updated = jiffies;
		data->temp_valid = 1;
	}
abort:
	mutex_unlock(&data->update_lock);
	return ret;
}

static int sch5627_update_fan(struct sch5627_data *data)
{
	int ret = 0;
	int i, val;

	mutex_lock(&data->update_lock);

	/* Cache the values for 1 second */
	if (time_after(jiffies, data->fan_last_updated + HZ) || !data->fan_valid) {
		for (i = 0; i < SCH5627_NO_FANS; i++) {
			val = sch56xx_read_virtual_reg16(data->addr, SCH5627_REG_FAN[i]);
			if (unlikely(val < 0)) {
				ret = val;
				goto abort;
			}
			data->fan[i] = val;
		}
		data->fan_last_updated = jiffies;
		data->fan_valid = 1;
	}
abort:
	mutex_unlock(&data->update_lock);
	return ret;
}

static int sch5627_update_in(struct sch5627_data *data)
{
	int ret = 0;
	int i, val;

	mutex_lock(&data->update_lock);

	/* Trigger a Vbat voltage measurement every 5 minutes */
	if (time_after(jiffies, data->last_battery + 300 * HZ)) {
		sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, data->control | 0x10);
		data->last_battery = jiffies;
	}

	/* Cache the values for 1 second */
	if (time_after(jiffies, data->in_last_updated + HZ) || !data->in_valid) {
		for (i = 0; i < SCH5627_NO_IN; i++) {
			val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_IN_MSB[i],
							 SCH5627_REG_IN_LSN[i],
							 SCH5627_REG_IN_HIGH_NIBBLE[i]);
			if (unlikely(val < 0)) {
				ret = val;
				goto abort;
			}
			data->in[i] = val;
		}
		data->in_last_updated = jiffies;
		data->in_valid = 1;
	}
abort:
	mutex_unlock(&data->update_lock);
	return ret;
}

static int sch5627_read_limits(struct sch5627_data *data)
{
	int i, val;

	for (i = 0; i < SCH5627_NO_TEMPS; i++) {
		/*
		 * Note what SMSC calls ABS, is what lm_sensors calls max
		 * (aka high), and HIGH is what lm_sensors calls crit.
		 */
		val = sch56xx_read_virtual_reg(data->addr,
					       SCH5627_REG_TEMP_ABS[i]);
		if (val < 0)
			return val;
		data->temp_max[i] = val;

		val = sch56xx_read_virtual_reg(data->addr,
					       SCH5627_REG_TEMP_HIGH[i]);
		if (val < 0)
			return val;
		data->temp_crit[i] = val;
	}
	for (i = 0; i < SCH5627_NO_FANS; i++) {
		val = sch56xx_read_virtual_reg16(data->addr,
						 SCH5627_REG_FAN_MIN[i]);
		if (val < 0)
			return val;
		data->fan_min[i] = val;
	}

	return 0;
}

static int reg_to_temp(u16 reg)
{
	return (reg * 625) / 10 - 64000;
}

static int reg_to_temp_limit(u8 reg)
{
	return (reg - 64) * 1000;
}

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

	return 5400540 / reg;
}

static umode_t sch5627_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr,
				  int channel)
{
	return 0444;
}

static int sch5627_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
			long *val)
{
	struct sch5627_data *data = dev_get_drvdata(dev);
	int ret;

	switch (type) {
	case hwmon_temp:
		ret = sch5627_update_temp(data);
		if (ret < 0)
			return ret;
		switch (attr) {
		case hwmon_temp_input:
			*val = reg_to_temp(data->temp[channel]);
			return 0;
		case hwmon_temp_max:
			*val = reg_to_temp_limit(data->temp_max[channel]);
			return 0;
		case hwmon_temp_crit:
			*val = reg_to_temp_limit(data->temp_crit[channel]);
			return 0;
		case hwmon_temp_fault:
			*val = (data->temp[channel] == 0);
			return 0;
		default:
			break;
		}
		break;
	case hwmon_fan:
		ret = sch5627_update_fan(data);
		if (ret < 0)
			return ret;
		switch (attr) {
		case hwmon_fan_input:
			ret = reg_to_rpm(data->fan[channel]);
			if (ret < 0)
				return ret;
			*val = ret;
			return 0;
		case hwmon_fan_min:
			ret = reg_to_rpm(data->fan_min[channel]);
			if (ret < 0)
				return ret;
			*val = ret;
			return 0;
		case hwmon_fan_fault:
			*val = (data->fan[channel] == 0xffff);
			return 0;
		default:
			break;
		}
		break;
	case hwmon_in:
		ret = sch5627_update_in(data);
		if (ret < 0)
			return ret;
		switch (attr) {
		case hwmon_in_input:
			*val = DIV_ROUND_CLOSEST(data->in[channel] * SCH5627_REG_IN_FACTOR[channel],
						 10000);
			return 0;
		default:
			break;
		}
		break;
	default:
		break;
	}

	return -EOPNOTSUPP;
}

static int sch5627_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr,
			       int channel, const char **str)
{
	switch (type) {
	case hwmon_in:
		switch (attr) {
		case hwmon_in_label:
			*str = SCH5627_IN_LABELS[channel];
			return 0;
		default:
			break;
		}
		break;
	default:
		break;
	}

	return -EOPNOTSUPP;
}

static const struct hwmon_ops sch5627_ops = {
	.is_visible = sch5627_is_visible,
	.read = sch5627_read,
	.read_string = sch5627_read_string,
};

static const struct hwmon_channel_info *sch5627_info[] = {
	HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ),
	HWMON_CHANNEL_INFO(temp,
			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT
			   ),
	HWMON_CHANNEL_INFO(fan,
			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
			   HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT
			   ),
	HWMON_CHANNEL_INFO(in,
			   HWMON_I_INPUT | HWMON_I_LABEL,
			   HWMON_I_INPUT | HWMON_I_LABEL,
			   HWMON_I_INPUT | HWMON_I_LABEL,
			   HWMON_I_INPUT | HWMON_I_LABEL,
			   HWMON_I_INPUT
			   ),
	NULL
};

static const struct hwmon_chip_info sch5627_chip_info = {
	.ops = &sch5627_ops,
	.info = sch5627_info,
};

static int sch5627_probe(struct platform_device *pdev)
{
	struct sch5627_data *data;
	struct device *hwmon_dev;
	int err, build_code, build_id, hwmon_rev, val;

	data = devm_kzalloc(&pdev->dev, sizeof(struct sch5627_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);

	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID);
	if (val < 0)
		return val;

	if (val != SCH5627_HWMON_ID) {
		pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
		       val, SCH5627_HWMON_ID);
		return -ENODEV;
	}

	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
	if (val < 0)
		return val;

	if (val != SCH5627_COMPANY_ID) {
		pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
		       val, SCH5627_COMPANY_ID);
		return -ENODEV;
	}

	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
	if (val < 0)
		return val;

	if (val != SCH5627_PRIMARY_ID) {
		pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
		       val, SCH5627_PRIMARY_ID);
		return -ENODEV;
	}

	build_code = sch56xx_read_virtual_reg(data->addr,
					      SCH5627_REG_BUILD_CODE);
	if (build_code < 0)
		return build_code;

	build_id = sch56xx_read_virtual_reg16(data->addr,
					      SCH5627_REG_BUILD_ID);
	if (build_id < 0)
		return build_id;

	hwmon_rev = sch56xx_read_virtual_reg(data->addr,
					     SCH5627_REG_HWMON_REV);
	if (hwmon_rev < 0)
		return hwmon_rev;

	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
	if (val < 0)
		return val;

	data->control = val;
	if (!(data->control & 0x01)) {
		pr_err("hardware monitoring not enabled\n");
		return -ENODEV;
	}
	/* Trigger a Vbat voltage measurement, so that we get a valid reading
	   the first time we read Vbat */
	sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
				  data->control | 0x10);
	data->last_battery = jiffies;

	/*
	 * Read limits, we do this only once as reading a register on
	 * the sch5627 is quite expensive (and they don't change).
	 */
	err = sch5627_read_limits(data);
	if (err)
		return err;

	pr_info("found %s chip at %#hx\n", DEVNAME, data->addr);
	pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
		build_code, build_id, hwmon_rev);

	hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, DEVNAME, data,
							 &sch5627_chip_info, NULL);
	if (IS_ERR(hwmon_dev))
		return PTR_ERR(hwmon_dev);

	/* Note failing to register the watchdog is not a fatal error */
	sch56xx_watchdog_register(&pdev->dev, data->addr,
				  (build_code << 24) | (build_id << 8) | hwmon_rev,
				  &data->update_lock, 1);

	return 0;
}

static struct platform_driver sch5627_driver = {
	.driver = {
		.name	= DRVNAME,
	},
	.probe		= sch5627_probe,
};

module_platform_driver(sch5627_driver);

MODULE_DESCRIPTION("SMSC SCH5627 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
a98d506c	2	/***************************************************************************
312869ec	3	* Copyright (C) 2010-2012 Hans de Goede <hdegoede@redhat.com> *
a98d506c	4	* *
a98d506c 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>
a98d506c HG	15	#include <linux/err.h>
a98d506c HG	16	#include <linux/mutex.h>
28ff2f7a	17	#include "sch56xx-common.h"
a98d506c HG	18
	19	#define DRVNAME "sch5627"
	20	#define DEVNAME DRVNAME /* We only support one model */
	21
a98d506c HG	22	#define SCH5627_HWMON_ID 0xa5
	23	#define SCH5627_COMPANY_ID 0x5c
	24	#define SCH5627_PRIMARY_ID 0xa0
	25
	26	#define SCH5627_REG_BUILD_CODE 0x39
	27	#define SCH5627_REG_BUILD_ID 0x3a
	28	#define SCH5627_REG_HWMON_ID 0x3c
	29	#define SCH5627_REG_HWMON_REV 0x3d
	30	#define SCH5627_REG_COMPANY_ID 0x3e
	31	#define SCH5627_REG_PRIMARY_ID 0x3f
	32	#define SCH5627_REG_CTRL 0x40
	33
	34	#define SCH5627_NO_TEMPS 8
	35	#define SCH5627_NO_FANS 4
	36	#define SCH5627_NO_IN 5
	37
	38	static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
	39	0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
	40	static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
	41	0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
	42	static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
	43	0, 0, 1, 1, 0, 0, 0, 1 };
	44	static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
	45	0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
	46	static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
	47	0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };
	48
	49	static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
	50	0x2C, 0x2E, 0x30, 0x32 };
	51	static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
	52	0x62, 0x64, 0x66, 0x68 };
	53
	54	static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
	55	0x22, 0x23, 0x24, 0x25, 0x189 };
	56	static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
	57	0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
	58	static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
	59	1, 0, 1, 0, 1 };
	60	static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
	61	10745, 3660, 9765, 10745, 3660 };
	62	static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
	63	"VCC", "VTT", "VBAT", "VTR", "V_IN" };
	64
	65	struct sch5627_data {
	66	unsigned short addr;
357b9dc6	67	u8 control;
a98d506c HG	68	u8 temp_max[SCH5627_NO_TEMPS];
	69	u8 temp_crit[SCH5627_NO_TEMPS];
	70	u16 fan_min[SCH5627_NO_FANS];
	71
	72	struct mutex update_lock;
357b9dc6	73	unsigned long last_battery; /* In jiffies */
790ac8fa AW	74	char temp_valid; /* !=0 if following fields are valid */
	75	char fan_valid;
	76	char in_valid;
	77	unsigned long temp_last_updated; /* In jiffies */
	78	unsigned long fan_last_updated;
	79	unsigned long in_last_updated;
a98d506c HG	80	u16 temp[SCH5627_NO_TEMPS];
	81	u16 fan[SCH5627_NO_FANS];
	82	u16 in[SCH5627_NO_IN];
	83	};
	84
790ac8fa	85	static int sch5627_update_temp(struct sch5627_data *data)
a98d506c	86	{
790ac8fa	87	int ret = 0;
a98d506c HG	88	int i, val;
	89
	90	mutex_lock(&data->update_lock);
	91
	92	/* Cache the values for 1 second */
790ac8fa	93	if (time_after(jiffies, data->temp_last_updated + HZ) \|\| !data->temp_valid) {
a98d506c	94	for (i = 0; i < SCH5627_NO_TEMPS; i++) {
790ac8fa AW	95	val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_TEMP_MSB[i],
	96	SCH5627_REG_TEMP_LSN[i],
	97	SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
a98d506c	98	if (unlikely(val < 0)) {
790ac8fa	99	ret = val;
a98d506c HG	100	goto abort;
	101	}
	102	data->temp[i] = val;
	103	}
790ac8fa AW	104	data->temp_last_updated = jiffies;
	105	data->temp_valid = 1;
	106	}
	107	abort:
	108	mutex_unlock(&data->update_lock);
	109	return ret;
	110	}
	111
	112	static int sch5627_update_fan(struct sch5627_data *data)
	113	{
	114	int ret = 0;
	115	int i, val;
a98d506c	116
790ac8fa AW	117	mutex_lock(&data->update_lock);
	118
	119	/* Cache the values for 1 second */
	120	if (time_after(jiffies, data->fan_last_updated + HZ) \|\| !data->fan_valid) {
a98d506c	121	for (i = 0; i < SCH5627_NO_FANS; i++) {
790ac8fa	122	val = sch56xx_read_virtual_reg16(data->addr, SCH5627_REG_FAN[i]);
a98d506c	123	if (unlikely(val < 0)) {
790ac8fa	124	ret = val;
a98d506c HG	125	goto abort;
	126	}
	127	data->fan[i] = val;
	128	}
790ac8fa AW	129	data->fan_last_updated = jiffies;
	130	data->fan_valid = 1;
	131	}
	132	abort:
	133	mutex_unlock(&data->update_lock);
	134	return ret;
	135	}
	136
	137	static int sch5627_update_in(struct sch5627_data *data)
	138	{
	139	int ret = 0;
	140	int i, val;
	141
	142	mutex_lock(&data->update_lock);
a98d506c	143
790ac8fa AW	144	/* Trigger a Vbat voltage measurement every 5 minutes */
	145	if (time_after(jiffies, data->last_battery + 300 * HZ)) {
	146	sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, data->control \| 0x10);
	147	data->last_battery = jiffies;
	148	}
	149
	150	/* Cache the values for 1 second */
	151	if (time_after(jiffies, data->in_last_updated + HZ) \|\| !data->in_valid) {
a98d506c	152	for (i = 0; i < SCH5627_NO_IN; i++) {
790ac8fa AW	153	val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_IN_MSB[i],
	154	SCH5627_REG_IN_LSN[i],
	155	SCH5627_REG_IN_HIGH_NIBBLE[i]);
a98d506c	156	if (unlikely(val < 0)) {
790ac8fa	157	ret = val;
a98d506c HG	158	goto abort;
	159	}
	160	data->in[i] = val;
	161	}
790ac8fa AW	162	data->in_last_updated = jiffies;
790ac8fa AW	163	data->in_valid = 1;
a98d506c HG	164	}
	165	abort:
	166	mutex_unlock(&data->update_lock);
	167	return ret;
	168	}
	169
6c931ae1	170	static int sch5627_read_limits(struct sch5627_data *data)
a98d506c HG	171	{
	172	int i, val;
	173
	174	for (i = 0; i < SCH5627_NO_TEMPS; i++) {
	175	/*
	176	* Note what SMSC calls ABS, is what lm_sensors calls max
	177	* (aka high), and HIGH is what lm_sensors calls crit.
	178	*/
28ff2f7a HG	179	val = sch56xx_read_virtual_reg(data->addr,
28ff2f7a HG	180	SCH5627_REG_TEMP_ABS[i]);
a98d506c HG	181	if (val < 0)
	182	return val;
	183	data->temp_max[i] = val;
	184
28ff2f7a HG	185	val = sch56xx_read_virtual_reg(data->addr,
28ff2f7a HG	186	SCH5627_REG_TEMP_HIGH[i]);
a98d506c HG	187	if (val < 0)
	188	return val;
	189	data->temp_crit[i] = val;
	190	}
	191	for (i = 0; i < SCH5627_NO_FANS; i++) {
28ff2f7a HG	192	val = sch56xx_read_virtual_reg16(data->addr,
28ff2f7a HG	193	SCH5627_REG_FAN_MIN[i]);
a98d506c HG	194	if (val < 0)
	195	return val;
	196	data->fan_min[i] = val;
	197	}
	198
	199	return 0;
	200	}
	201
	202	static int reg_to_temp(u16 reg)
	203	{
	204	return (reg * 625) / 10 - 64000;
	205	}
	206
	207	static int reg_to_temp_limit(u8 reg)
	208	{
	209	return (reg - 64) * 1000;
	210	}
	211
	212	static int reg_to_rpm(u16 reg)
	213	{
	214	if (reg == 0)
	215	return -EIO;
	216	if (reg == 0xffff)
	217	return 0;
	218
	219	return 5400540 / reg;
	220	}
	221
e7e0b466 AW	222	static umode_t sch5627_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr,
e7e0b466 AW	223	int channel)
a98d506c	224	{
e7e0b466	225	return 0444;
a98d506c HG	226	}
a98d506c HG	227
e7e0b466 AW	228	static int sch5627_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
e7e0b466 AW	229	long *val)
a98d506c	230	{
790ac8fa	231	struct sch5627_data *data = dev_get_drvdata(dev);
e7e0b466	232	int ret;
a98d506c	233
e7e0b466 AW	234	switch (type) {
e7e0b466 AW	235	case hwmon_temp:
790ac8fa AW	236	ret = sch5627_update_temp(data);
	237	if (ret < 0)
	238	return ret;
e7e0b466 AW	239	switch (attr) {
	240	case hwmon_temp_input:
	241	*val = reg_to_temp(data->temp[channel]);
	242	return 0;
	243	case hwmon_temp_max:
	244	*val = reg_to_temp_limit(data->temp_max[channel]);
	245	return 0;
	246	case hwmon_temp_crit:
	247	*val = reg_to_temp_limit(data->temp_crit[channel]);
	248	return 0;
	249	case hwmon_temp_fault:
	250	*val = (data->temp[channel] == 0);
	251	return 0;
	252	default:
	253	break;
	254	}
	255	break;
	256	case hwmon_fan:
790ac8fa AW	257	ret = sch5627_update_fan(data);
	258	if (ret < 0)
	259	return ret;
e7e0b466 AW	260	switch (attr) {
	261	case hwmon_fan_input:
	262	ret = reg_to_rpm(data->fan[channel]);
	263	if (ret < 0)
	264	return ret;
	265	*val = ret;
	266	return 0;
	267	case hwmon_fan_min:
	268	ret = reg_to_rpm(data->fan_min[channel]);
	269	if (ret < 0)
	270	return ret;
	271	*val = ret;
	272	return 0;
	273	case hwmon_fan_fault:
	274	*val = (data->fan[channel] == 0xffff);
	275	return 0;
	276	default:
	277	break;
	278	}
	279	break;
	280	case hwmon_in:
790ac8fa AW	281	ret = sch5627_update_in(data);
	282	if (ret < 0)
	283	return ret;
e7e0b466 AW	284	switch (attr) {
	285	case hwmon_in_input:
	286	val = DIV_ROUND_CLOSEST(data->in[channel] SCH5627_REG_IN_FACTOR[channel],
	287	10000);
	288	return 0;
	289	default:
	290	break;
	291	}
	292	break;
	293	default:
	294	break;
	295	}
a98d506c	296
e7e0b466	297	return -EOPNOTSUPP;
a98d506c HG	298	}
a98d506c HG	299
e7e0b466 AW	300	static int sch5627_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr,
e7e0b466 AW	301	int channel, const char **str)
a98d506c	302	{
e7e0b466 AW	303	switch (type) {
	304	case hwmon_in:
	305	switch (attr) {
	306	case hwmon_in_label:
	307	*str = SCH5627_IN_LABELS[channel];
	308	return 0;
	309	default:
	310	break;
	311	}
	312	break;
	313	default:
	314	break;
	315	}
a98d506c	316
e7e0b466	317	return -EOPNOTSUPP;
a98d506c HG	318	}
a98d506c HG	319
e7e0b466 AW	320	static const struct hwmon_ops sch5627_ops = {
	321	.is_visible = sch5627_is_visible,
	322	.read = sch5627_read,
	323	.read_string = sch5627_read_string,
	324	};
a98d506c	325
e7e0b466 AW	326	static const struct hwmon_channel_info *sch5627_info[] = {
	327	HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ),
	328	HWMON_CHANNEL_INFO(temp,
	329	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	330	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	331	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	332	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	333	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	334	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	335	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	336	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT
	337	),
	338	HWMON_CHANNEL_INFO(fan,
	339	HWMON_F_INPUT \| HWMON_F_MIN \| HWMON_F_FAULT,
	340	HWMON_F_INPUT \| HWMON_F_MIN \| HWMON_F_FAULT,
	341	HWMON_F_INPUT \| HWMON_F_MIN \| HWMON_F_FAULT,
	342	HWMON_F_INPUT \| HWMON_F_MIN \| HWMON_F_FAULT
	343	),
	344	HWMON_CHANNEL_INFO(in,
	345	HWMON_I_INPUT \| HWMON_I_LABEL,
	346	HWMON_I_INPUT \| HWMON_I_LABEL,
	347	HWMON_I_INPUT \| HWMON_I_LABEL,
	348	HWMON_I_INPUT \| HWMON_I_LABEL,
	349	HWMON_I_INPUT
	350	),
a98d506c HG	351	NULL
	352	};
	353
e7e0b466 AW	354	static const struct hwmon_chip_info sch5627_chip_info = {
	355	.ops = &sch5627_ops,
	356	.info = sch5627_info,
a98d506c HG	357	};
a98d506c HG	358
6c931ae1	359	static int sch5627_probe(struct platform_device *pdev)
a98d506c HG	360	{
a98d506c HG	361	struct sch5627_data *data;
93a6fb2c	362	struct device *hwmon_dev;
a98d506c HG	363	int err, build_code, build_id, hwmon_rev, val;
a98d506c HG	364
bd8d8e08 GR	365	data = devm_kzalloc(&pdev->dev, sizeof(struct sch5627_data),
bd8d8e08 GR	366	GFP_KERNEL);
a98d506c HG	367	if (!data)
	368	return -ENOMEM;
	369
	370	data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
	371	mutex_init(&data->update_lock);
	372	platform_set_drvdata(pdev, data);
	373
28ff2f7a	374	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID);
bab10bf9 AW	375	if (val < 0)
	376	return val;
	377
a98d506c HG	378	if (val != SCH5627_HWMON_ID) {
	379	pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
	380	val, SCH5627_HWMON_ID);
bab10bf9	381	return -ENODEV;
a98d506c HG	382	}
a98d506c HG	383
28ff2f7a	384	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
bab10bf9 AW	385	if (val < 0)
	386	return val;
	387
a98d506c HG	388	if (val != SCH5627_COMPANY_ID) {
	389	pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
	390	val, SCH5627_COMPANY_ID);
bab10bf9	391	return -ENODEV;
a98d506c HG	392	}
a98d506c HG	393
28ff2f7a	394	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
bab10bf9 AW	395	if (val < 0)
	396	return val;
	397
a98d506c HG	398	if (val != SCH5627_PRIMARY_ID) {
	399	pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
	400	val, SCH5627_PRIMARY_ID);
bab10bf9	401	return -ENODEV;
a98d506c HG	402	}
a98d506c HG	403
28ff2f7a HG	404	build_code = sch56xx_read_virtual_reg(data->addr,
28ff2f7a HG	405	SCH5627_REG_BUILD_CODE);
bab10bf9 AW	406	if (build_code < 0)
bab10bf9 AW	407	return build_code;
a98d506c	408
28ff2f7a HG	409	build_id = sch56xx_read_virtual_reg16(data->addr,
28ff2f7a HG	410	SCH5627_REG_BUILD_ID);
bab10bf9 AW	411	if (build_id < 0)
bab10bf9 AW	412	return build_id;
a98d506c	413
28ff2f7a HG	414	hwmon_rev = sch56xx_read_virtual_reg(data->addr,
28ff2f7a HG	415	SCH5627_REG_HWMON_REV);
bab10bf9 AW	416	if (hwmon_rev < 0)
bab10bf9 AW	417	return hwmon_rev;
a98d506c	418
28ff2f7a	419	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
bab10bf9 AW	420	if (val < 0)
	421	return val;
	422
357b9dc6 HG	423	data->control = val;
357b9dc6 HG	424	if (!(data->control & 0x01)) {
a98d506c	425	pr_err("hardware monitoring not enabled\n");
bab10bf9	426	return -ENODEV;
a98d506c	427	}
357b9dc6 HG	428	/* Trigger a Vbat voltage measurement, so that we get a valid reading
357b9dc6 HG	429	the first time we read Vbat */
28ff2f7a	430	sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
357b9dc6 HG	431	data->control \| 0x10);
357b9dc6 HG	432	data->last_battery = jiffies;
a98d506c HG	433
	434	/*
	435	* Read limits, we do this only once as reading a register on
	436	* the sch5627 is quite expensive (and they don't change).
	437	*/
	438	err = sch5627_read_limits(data);
	439	if (err)
bab10bf9	440	return err;
a98d506c	441
28ff2f7a	442	pr_info("found %s chip at %#hx\n", DEVNAME, data->addr);
a98d506c HG	443	pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
	444	build_code, build_id, hwmon_rev);
	445
93a6fb2c AW	446	hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, DEVNAME, data,
93a6fb2c AW	447	&sch5627_chip_info, NULL);
bab10bf9 AW	448	if (IS_ERR(hwmon_dev))
bab10bf9 AW	449	return PTR_ERR(hwmon_dev);
a98d506c	450
312869ec	451	/* Note failing to register the watchdog is not a fatal error */
2be5f0d7 AW	452	sch56xx_watchdog_register(&pdev->dev, data->addr,
	453	(build_code << 24) \| (build_id << 8) \| hwmon_rev,
	454	&data->update_lock, 1);
312869ec	455
a98d506c	456	return 0;
a98d506c HG	457	}
a98d506c HG	458
a98d506c HG	459	static struct platform_driver sch5627_driver = {
a98d506c HG	460	.driver = {
a98d506c HG	461	.name = DRVNAME,
	462	},
	463	.probe = sch5627_probe,
a98d506c HG	464	};
a98d506c HG	465
25a236a5	466	module_platform_driver(sch5627_driver);
a98d506c HG	467
a98d506c HG	468	MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
7958e3b4	469	MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
a98d506c	470	MODULE_LICENSE("GPL");