[linux-2.6-block.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/mod_devicetable.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_PWM_MAP[SCH5627_NO_FANS] = {
	0xA0, 0xA1, 0xA2, 0xA3 };

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)
{
	if (type == hwmon_pwm && attr == hwmon_pwm_auto_channels_temp)
		return 0644;

	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_pwm:
		switch (attr) {
		case hwmon_pwm_auto_channels_temp:
			mutex_lock(&data->update_lock);
			ret = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PWM_MAP[channel]);
			mutex_unlock(&data->update_lock);

			if (ret < 0)
				return ret;

			*val = ret;

			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 int sch5627_write(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_pwm:
		switch (attr) {
		case hwmon_pwm_auto_channels_temp:
			/* registers are 8 bit wide */
			if (val > U8_MAX || val < 0)
				return -EINVAL;

			mutex_lock(&data->update_lock);
			ret = sch56xx_write_virtual_reg(data->addr, SCH5627_REG_PWM_MAP[channel],
							val);
			mutex_unlock(&data->update_lock);

			return ret;
		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,
	.write = sch5627_write,
};

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(pwm,
			   HWMON_PWM_AUTO_CHANNELS_TEMP,
			   HWMON_PWM_AUTO_CHANNELS_TEMP,
			   HWMON_PWM_AUTO_CHANNELS_TEMP,
			   HWMON_PWM_AUTO_CHANNELS_TEMP
			   ),
	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 const struct platform_device_id sch5627_device_id[] = {
	{
		.name = "sch5627",
	},
	{ }
};
MODULE_DEVICE_TABLE(platform, sch5627_device_id);

static struct platform_driver sch5627_driver = {
	.driver = {
		.name	= DRVNAME,
	},
	.probe		= sch5627_probe,
	.id_table	= sch5627_device_id,
};

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>
4db3c092	10	#include <linux/mod_devicetable.h>
a98d506c HG	11	#include <linux/init.h>
	12	#include <linux/slab.h>
	13	#include <linux/jiffies.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/hwmon.h>
a98d506c HG	16	#include <linux/err.h>
a98d506c HG	17	#include <linux/mutex.h>
28ff2f7a	18	#include "sch56xx-common.h"
a98d506c HG	19
	20	#define DRVNAME "sch5627"
	21	#define DEVNAME DRVNAME /* We only support one model */
	22
a98d506c HG	23	#define SCH5627_HWMON_ID 0xa5
	24	#define SCH5627_COMPANY_ID 0x5c
	25	#define SCH5627_PRIMARY_ID 0xa0
	26
	27	#define SCH5627_REG_BUILD_CODE 0x39
	28	#define SCH5627_REG_BUILD_ID 0x3a
	29	#define SCH5627_REG_HWMON_ID 0x3c
	30	#define SCH5627_REG_HWMON_REV 0x3d
	31	#define SCH5627_REG_COMPANY_ID 0x3e
	32	#define SCH5627_REG_PRIMARY_ID 0x3f
	33	#define SCH5627_REG_CTRL 0x40
	34
	35	#define SCH5627_NO_TEMPS 8
	36	#define SCH5627_NO_FANS 4
	37	#define SCH5627_NO_IN 5
	38
	39	static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
	40	0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
	41	static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
	42	0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
	43	static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
	44	0, 0, 1, 1, 0, 0, 0, 1 };
	45	static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
	46	0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
	47	static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
	48	0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };
	49
	50	static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
	51	0x2C, 0x2E, 0x30, 0x32 };
	52	static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
	53	0x62, 0x64, 0x66, 0x68 };
	54
aa9f833d AW	55	static const u16 SCH5627_REG_PWM_MAP[SCH5627_NO_FANS] = {
	56	0xA0, 0xA1, 0xA2, 0xA3 };
	57
a98d506c HG	58	static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
	59	0x22, 0x23, 0x24, 0x25, 0x189 };
	60	static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
	61	0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
	62	static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
	63	1, 0, 1, 0, 1 };
	64	static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
	65	10745, 3660, 9765, 10745, 3660 };
	66	static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
	67	"VCC", "VTT", "VBAT", "VTR", "V_IN" };
	68
	69	struct sch5627_data {
	70	unsigned short addr;
357b9dc6	71	u8 control;
a98d506c HG	72	u8 temp_max[SCH5627_NO_TEMPS];
	73	u8 temp_crit[SCH5627_NO_TEMPS];
	74	u16 fan_min[SCH5627_NO_FANS];
	75
	76	struct mutex update_lock;
357b9dc6	77	unsigned long last_battery; /* In jiffies */
790ac8fa AW	78	char temp_valid; /* !=0 if following fields are valid */
	79	char fan_valid;
	80	char in_valid;
	81	unsigned long temp_last_updated; /* In jiffies */
	82	unsigned long fan_last_updated;
	83	unsigned long in_last_updated;
a98d506c HG	84	u16 temp[SCH5627_NO_TEMPS];
	85	u16 fan[SCH5627_NO_FANS];
	86	u16 in[SCH5627_NO_IN];
	87	};
	88
790ac8fa	89	static int sch5627_update_temp(struct sch5627_data *data)
a98d506c	90	{
790ac8fa	91	int ret = 0;
a98d506c HG	92	int i, val;
	93
	94	mutex_lock(&data->update_lock);
	95
	96	/* Cache the values for 1 second */
790ac8fa	97	if (time_after(jiffies, data->temp_last_updated + HZ) \|\| !data->temp_valid) {
a98d506c	98	for (i = 0; i < SCH5627_NO_TEMPS; i++) {
790ac8fa AW	99	val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_TEMP_MSB[i],
	100	SCH5627_REG_TEMP_LSN[i],
	101	SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
a98d506c	102	if (unlikely(val < 0)) {
790ac8fa	103	ret = val;
a98d506c HG	104	goto abort;
	105	}
	106	data->temp[i] = val;
	107	}
790ac8fa AW	108	data->temp_last_updated = jiffies;
	109	data->temp_valid = 1;
	110	}
	111	abort:
	112	mutex_unlock(&data->update_lock);
	113	return ret;
	114	}
	115
	116	static int sch5627_update_fan(struct sch5627_data *data)
	117	{
	118	int ret = 0;
	119	int i, val;
a98d506c	120
790ac8fa AW	121	mutex_lock(&data->update_lock);
	122
	123	/* Cache the values for 1 second */
	124	if (time_after(jiffies, data->fan_last_updated + HZ) \|\| !data->fan_valid) {
a98d506c	125	for (i = 0; i < SCH5627_NO_FANS; i++) {
790ac8fa	126	val = sch56xx_read_virtual_reg16(data->addr, SCH5627_REG_FAN[i]);
a98d506c	127	if (unlikely(val < 0)) {
790ac8fa	128	ret = val;
a98d506c HG	129	goto abort;
	130	}
	131	data->fan[i] = val;
	132	}
790ac8fa AW	133	data->fan_last_updated = jiffies;
	134	data->fan_valid = 1;
	135	}
	136	abort:
	137	mutex_unlock(&data->update_lock);
	138	return ret;
	139	}
	140
	141	static int sch5627_update_in(struct sch5627_data *data)
	142	{
	143	int ret = 0;
	144	int i, val;
	145
	146	mutex_lock(&data->update_lock);
a98d506c	147
790ac8fa AW	148	/* Trigger a Vbat voltage measurement every 5 minutes */
	149	if (time_after(jiffies, data->last_battery + 300 * HZ)) {
	150	sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, data->control \| 0x10);
	151	data->last_battery = jiffies;
	152	}
	153
	154	/* Cache the values for 1 second */
	155	if (time_after(jiffies, data->in_last_updated + HZ) \|\| !data->in_valid) {
a98d506c	156	for (i = 0; i < SCH5627_NO_IN; i++) {
790ac8fa AW	157	val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_IN_MSB[i],
	158	SCH5627_REG_IN_LSN[i],
	159	SCH5627_REG_IN_HIGH_NIBBLE[i]);
a98d506c	160	if (unlikely(val < 0)) {
790ac8fa	161	ret = val;
a98d506c HG	162	goto abort;
	163	}
	164	data->in[i] = val;
	165	}
790ac8fa AW	166	data->in_last_updated = jiffies;
790ac8fa AW	167	data->in_valid = 1;
a98d506c HG	168	}
	169	abort:
	170	mutex_unlock(&data->update_lock);
	171	return ret;
	172	}
	173
6c931ae1	174	static int sch5627_read_limits(struct sch5627_data *data)
a98d506c HG	175	{
	176	int i, val;
	177
	178	for (i = 0; i < SCH5627_NO_TEMPS; i++) {
	179	/*
	180	* Note what SMSC calls ABS, is what lm_sensors calls max
	181	* (aka high), and HIGH is what lm_sensors calls crit.
	182	*/
28ff2f7a HG	183	val = sch56xx_read_virtual_reg(data->addr,
28ff2f7a HG	184	SCH5627_REG_TEMP_ABS[i]);
a98d506c HG	185	if (val < 0)
	186	return val;
	187	data->temp_max[i] = val;
	188
28ff2f7a HG	189	val = sch56xx_read_virtual_reg(data->addr,
28ff2f7a HG	190	SCH5627_REG_TEMP_HIGH[i]);
a98d506c HG	191	if (val < 0)
	192	return val;
	193	data->temp_crit[i] = val;
	194	}
	195	for (i = 0; i < SCH5627_NO_FANS; i++) {
28ff2f7a HG	196	val = sch56xx_read_virtual_reg16(data->addr,
28ff2f7a HG	197	SCH5627_REG_FAN_MIN[i]);
a98d506c HG	198	if (val < 0)
	199	return val;
	200	data->fan_min[i] = val;
	201	}
	202
	203	return 0;
	204	}
	205
	206	static int reg_to_temp(u16 reg)
	207	{
	208	return (reg * 625) / 10 - 64000;
	209	}
	210
	211	static int reg_to_temp_limit(u8 reg)
	212	{
	213	return (reg - 64) * 1000;
	214	}
	215
	216	static int reg_to_rpm(u16 reg)
	217	{
	218	if (reg == 0)
	219	return -EIO;
	220	if (reg == 0xffff)
	221	return 0;
	222
	223	return 5400540 / reg;
	224	}
	225
e7e0b466 AW	226	static umode_t sch5627_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr,
e7e0b466 AW	227	int channel)
a98d506c	228	{
aa9f833d AW	229	if (type == hwmon_pwm && attr == hwmon_pwm_auto_channels_temp)
	230	return 0644;
	231
e7e0b466	232	return 0444;
a98d506c HG	233	}
a98d506c HG	234
e7e0b466 AW	235	static int sch5627_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
e7e0b466 AW	236	long *val)
a98d506c	237	{
790ac8fa	238	struct sch5627_data *data = dev_get_drvdata(dev);
e7e0b466	239	int ret;
a98d506c	240
e7e0b466 AW	241	switch (type) {
e7e0b466 AW	242	case hwmon_temp:
790ac8fa AW	243	ret = sch5627_update_temp(data);
	244	if (ret < 0)
	245	return ret;
e7e0b466 AW	246	switch (attr) {
	247	case hwmon_temp_input:
	248	*val = reg_to_temp(data->temp[channel]);
	249	return 0;
	250	case hwmon_temp_max:
	251	*val = reg_to_temp_limit(data->temp_max[channel]);
	252	return 0;
	253	case hwmon_temp_crit:
	254	*val = reg_to_temp_limit(data->temp_crit[channel]);
	255	return 0;
	256	case hwmon_temp_fault:
	257	*val = (data->temp[channel] == 0);
	258	return 0;
	259	default:
	260	break;
	261	}
	262	break;
	263	case hwmon_fan:
790ac8fa AW	264	ret = sch5627_update_fan(data);
	265	if (ret < 0)
	266	return ret;
e7e0b466 AW	267	switch (attr) {
	268	case hwmon_fan_input:
	269	ret = reg_to_rpm(data->fan[channel]);
	270	if (ret < 0)
	271	return ret;
	272	*val = ret;
	273	return 0;
	274	case hwmon_fan_min:
	275	ret = reg_to_rpm(data->fan_min[channel]);
	276	if (ret < 0)
	277	return ret;
	278	*val = ret;
	279	return 0;
	280	case hwmon_fan_fault:
	281	*val = (data->fan[channel] == 0xffff);
	282	return 0;
	283	default:
	284	break;
	285	}
	286	break;
aa9f833d AW	287	case hwmon_pwm:
	288	switch (attr) {
	289	case hwmon_pwm_auto_channels_temp:
	290	mutex_lock(&data->update_lock);
	291	ret = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PWM_MAP[channel]);
	292	mutex_unlock(&data->update_lock);
	293
	294	if (ret < 0)
	295	return ret;
	296
	297	*val = ret;
	298
	299	return 0;
	300	default:
	301	break;
	302	}
	303	break;
e7e0b466	304	case hwmon_in:
790ac8fa AW	305	ret = sch5627_update_in(data);
	306	if (ret < 0)
	307	return ret;
e7e0b466 AW	308	switch (attr) {
	309	case hwmon_in_input:
	310	val = DIV_ROUND_CLOSEST(data->in[channel] SCH5627_REG_IN_FACTOR[channel],
	311	10000);
	312	return 0;
	313	default:
	314	break;
	315	}
	316	break;
	317	default:
	318	break;
	319	}
a98d506c	320
e7e0b466	321	return -EOPNOTSUPP;
a98d506c HG	322	}
a98d506c HG	323
e7e0b466 AW	324	static int sch5627_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr,
e7e0b466 AW	325	int channel, const char **str)
a98d506c	326	{
e7e0b466 AW	327	switch (type) {
	328	case hwmon_in:
	329	switch (attr) {
	330	case hwmon_in_label:
	331	*str = SCH5627_IN_LABELS[channel];
	332	return 0;
	333	default:
	334	break;
	335	}
	336	break;
	337	default:
	338	break;
	339	}
a98d506c	340
e7e0b466	341	return -EOPNOTSUPP;
a98d506c HG	342	}
a98d506c HG	343
aa9f833d AW	344	static int sch5627_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
	345	long val)
	346	{
	347	struct sch5627_data *data = dev_get_drvdata(dev);
	348	int ret;
	349
	350	switch (type) {
	351	case hwmon_pwm:
	352	switch (attr) {
	353	case hwmon_pwm_auto_channels_temp:
	354	/* registers are 8 bit wide */
	355	if (val > U8_MAX \|\| val < 0)
	356	return -EINVAL;
	357
	358	mutex_lock(&data->update_lock);
	359	ret = sch56xx_write_virtual_reg(data->addr, SCH5627_REG_PWM_MAP[channel],
	360	val);
	361	mutex_unlock(&data->update_lock);
	362
	363	return ret;
	364	default:
	365	break;
	366	}
	367	break;
	368	default:
	369	break;
	370	}
	371
	372	return -EOPNOTSUPP;
	373	}
	374
e7e0b466 AW	375	static const struct hwmon_ops sch5627_ops = {
	376	.is_visible = sch5627_is_visible,
	377	.read = sch5627_read,
	378	.read_string = sch5627_read_string,
aa9f833d	379	.write = sch5627_write,
e7e0b466	380	};
a98d506c	381
e7e0b466 AW	382	static const struct hwmon_channel_info *sch5627_info[] = {
	383	HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ),
	384	HWMON_CHANNEL_INFO(temp,
	385	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	386	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	387	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	388	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	389	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	390	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	391	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT,
	392	HWMON_T_INPUT \| HWMON_T_MAX \| HWMON_T_CRIT \| HWMON_T_FAULT
	393	),
	394	HWMON_CHANNEL_INFO(fan,
	395	HWMON_F_INPUT \| HWMON_F_MIN \| HWMON_F_FAULT,
	396	HWMON_F_INPUT \| HWMON_F_MIN \| HWMON_F_FAULT,
	397	HWMON_F_INPUT \| HWMON_F_MIN \| HWMON_F_FAULT,
	398	HWMON_F_INPUT \| HWMON_F_MIN \| HWMON_F_FAULT
	399	),
aa9f833d AW	400	HWMON_CHANNEL_INFO(pwm,
	401	HWMON_PWM_AUTO_CHANNELS_TEMP,
	402	HWMON_PWM_AUTO_CHANNELS_TEMP,
	403	HWMON_PWM_AUTO_CHANNELS_TEMP,
	404	HWMON_PWM_AUTO_CHANNELS_TEMP
	405	),
e7e0b466 AW	406	HWMON_CHANNEL_INFO(in,
	407	HWMON_I_INPUT \| HWMON_I_LABEL,
	408	HWMON_I_INPUT \| HWMON_I_LABEL,
	409	HWMON_I_INPUT \| HWMON_I_LABEL,
	410	HWMON_I_INPUT \| HWMON_I_LABEL,
	411	HWMON_I_INPUT
	412	),
a98d506c HG	413	NULL
	414	};
	415
e7e0b466 AW	416	static const struct hwmon_chip_info sch5627_chip_info = {
	417	.ops = &sch5627_ops,
	418	.info = sch5627_info,
a98d506c HG	419	};
a98d506c HG	420
6c931ae1	421	static int sch5627_probe(struct platform_device *pdev)
a98d506c HG	422	{
a98d506c HG	423	struct sch5627_data *data;
93a6fb2c	424	struct device *hwmon_dev;
a98d506c HG	425	int err, build_code, build_id, hwmon_rev, val;
a98d506c HG	426
bd8d8e08 GR	427	data = devm_kzalloc(&pdev->dev, sizeof(struct sch5627_data),
bd8d8e08 GR	428	GFP_KERNEL);
a98d506c HG	429	if (!data)
	430	return -ENOMEM;
	431
	432	data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
	433	mutex_init(&data->update_lock);
	434	platform_set_drvdata(pdev, data);
	435
28ff2f7a	436	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID);
bab10bf9 AW	437	if (val < 0)
	438	return val;
	439
a98d506c HG	440	if (val != SCH5627_HWMON_ID) {
	441	pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
	442	val, SCH5627_HWMON_ID);
bab10bf9	443	return -ENODEV;
a98d506c HG	444	}
a98d506c HG	445
28ff2f7a	446	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
bab10bf9 AW	447	if (val < 0)
	448	return val;
	449
a98d506c HG	450	if (val != SCH5627_COMPANY_ID) {
	451	pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
	452	val, SCH5627_COMPANY_ID);
bab10bf9	453	return -ENODEV;
a98d506c HG	454	}
a98d506c HG	455
28ff2f7a	456	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
bab10bf9 AW	457	if (val < 0)
	458	return val;
	459
a98d506c HG	460	if (val != SCH5627_PRIMARY_ID) {
	461	pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
	462	val, SCH5627_PRIMARY_ID);
bab10bf9	463	return -ENODEV;
a98d506c HG	464	}
a98d506c HG	465
28ff2f7a HG	466	build_code = sch56xx_read_virtual_reg(data->addr,
28ff2f7a HG	467	SCH5627_REG_BUILD_CODE);
bab10bf9 AW	468	if (build_code < 0)
bab10bf9 AW	469	return build_code;
a98d506c	470
28ff2f7a HG	471	build_id = sch56xx_read_virtual_reg16(data->addr,
28ff2f7a HG	472	SCH5627_REG_BUILD_ID);
bab10bf9 AW	473	if (build_id < 0)
bab10bf9 AW	474	return build_id;
a98d506c	475
28ff2f7a HG	476	hwmon_rev = sch56xx_read_virtual_reg(data->addr,
28ff2f7a HG	477	SCH5627_REG_HWMON_REV);
bab10bf9 AW	478	if (hwmon_rev < 0)
bab10bf9 AW	479	return hwmon_rev;
a98d506c	480
28ff2f7a	481	val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
bab10bf9 AW	482	if (val < 0)
	483	return val;
	484
357b9dc6 HG	485	data->control = val;
357b9dc6 HG	486	if (!(data->control & 0x01)) {
a98d506c	487	pr_err("hardware monitoring not enabled\n");
bab10bf9	488	return -ENODEV;
a98d506c	489	}
357b9dc6 HG	490	/* Trigger a Vbat voltage measurement, so that we get a valid reading
357b9dc6 HG	491	the first time we read Vbat */
28ff2f7a	492	sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
357b9dc6 HG	493	data->control \| 0x10);
357b9dc6 HG	494	data->last_battery = jiffies;
a98d506c HG	495
	496	/*
	497	* Read limits, we do this only once as reading a register on
	498	* the sch5627 is quite expensive (and they don't change).
	499	*/
	500	err = sch5627_read_limits(data);
	501	if (err)
bab10bf9	502	return err;
a98d506c	503
28ff2f7a	504	pr_info("found %s chip at %#hx\n", DEVNAME, data->addr);
a98d506c HG	505	pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
	506	build_code, build_id, hwmon_rev);
	507
93a6fb2c AW	508	hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, DEVNAME, data,
93a6fb2c AW	509	&sch5627_chip_info, NULL);
bab10bf9 AW	510	if (IS_ERR(hwmon_dev))
bab10bf9 AW	511	return PTR_ERR(hwmon_dev);
a98d506c	512
312869ec	513	/* Note failing to register the watchdog is not a fatal error */
2be5f0d7 AW	514	sch56xx_watchdog_register(&pdev->dev, data->addr,
	515	(build_code << 24) \| (build_id << 8) \| hwmon_rev,
	516	&data->update_lock, 1);
312869ec	517
a98d506c	518	return 0;
a98d506c HG	519	}
a98d506c HG	520
4db3c092 AW	521	static const struct platform_device_id sch5627_device_id[] = {
	522	{
	523	.name = "sch5627",
	524	},
	525	{ }
	526	};
	527	MODULE_DEVICE_TABLE(platform, sch5627_device_id);
	528
a98d506c HG	529	static struct platform_driver sch5627_driver = {
a98d506c HG	530	.driver = {
a98d506c HG	531	.name = DRVNAME,
	532	},
	533	.probe = sch5627_probe,
4db3c092	534	.id_table = sch5627_device_id,
a98d506c HG	535	};
a98d506c HG	536
25a236a5	537	module_platform_driver(sch5627_driver);
a98d506c HG	538
a98d506c HG	539	MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
7958e3b4	540	MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
a98d506c	541	MODULE_LICENSE("GPL");