1 files changed, 432 insertions, 0 deletions

diff --git a/drivers/hwmon/thmc50.c b/drivers/hwmon/thmc50.c
new file mode 100644
index 000000000..81cdb0129
--- /dev/null
+++ b/drivers/hwmon/thmc50.c
@@ -0,0 +1,432 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * thmc50.c - Part of lm_sensors, Linux kernel modules for hardware
+ *	      monitoring
+ * Copyright (C) 2007 Krzysztof Helt <krzysztof.h1@wp.pl>
+ * Based on 2.4 driver by Frodo Looijaard <frodol@dds.nl> and
+ * Philip Edelbrock <phil@netroedge.com>
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/jiffies.h>
+
+MODULE_LICENSE("GPL");
+
+/* Addresses to scan */
+static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
+
+/* Insmod parameters */
+enum chips { thmc50, adm1022 };
+
+static unsigned short adm1022_temp3[16];
+static unsigned int adm1022_temp3_num;
+module_param_array(adm1022_temp3, ushort, &adm1022_temp3_num, 0);
+MODULE_PARM_DESC(adm1022_temp3,
+		 "List of adapter,address pairs to enable 3rd temperature (ADM1022 only)");
+
+/* Many THMC50 constants specified below */
+
+/* The THMC50 registers */
+#define THMC50_REG_CONF				0x40
+#define THMC50_REG_COMPANY_ID			0x3E
+#define THMC50_REG_DIE_CODE			0x3F
+#define THMC50_REG_ANALOG_OUT			0x19
+/*
+ * The mirror status register cannot be used as
+ * reading it does not clear alarms.
+ */
+#define THMC50_REG_INTR				0x41
+
+static const u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };
+static const u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };
+static const u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };
+static const u8 THMC50_REG_TEMP_CRITICAL[] = { 0x13, 0x14, 0x14 };
+static const u8 THMC50_REG_TEMP_DEFAULT[] = { 0x17, 0x18, 0x18 };
+
+#define THMC50_REG_CONF_nFANOFF			0x20
+#define THMC50_REG_CONF_PROGRAMMED		0x08
+
+/* Each client has this additional data */
+struct thmc50_data {
+	struct i2c_client *client;
+	const struct attribute_group *groups[3];
+
+	struct mutex update_lock;
+	enum chips type;
+	unsigned long last_updated;	/* In jiffies */
+	char has_temp3;		/* !=0 if it is ADM1022 in temp3 mode */
+	bool valid;		/* true if following fields are valid */
+
+	/* Register values */
+	s8 temp_input[3];
+	s8 temp_max[3];
+	s8 temp_min[3];
+	s8 temp_critical[3];
+	u8 analog_out;
+	u8 alarms;
+};
+
+static struct thmc50_data *thmc50_update_device(struct device *dev)
+{
+	struct thmc50_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
+	int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0);
+
+	mutex_lock(&data->update_lock);
+
+	if (time_after(jiffies, data->last_updated + timeout)
+	    || !data->valid) {
+
+		int temps = data->has_temp3 ? 3 : 2;
+		int i;
+		int prog = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
+
+		prog &= THMC50_REG_CONF_PROGRAMMED;
+
+		for (i = 0; i < temps; i++) {
+			data->temp_input[i] = i2c_smbus_read_byte_data(client,
+						THMC50_REG_TEMP[i]);
+			data->temp_max[i] = i2c_smbus_read_byte_data(client,
+						THMC50_REG_TEMP_MAX[i]);
+			data->temp_min[i] = i2c_smbus_read_byte_data(client,
+						THMC50_REG_TEMP_MIN[i]);
+			data->temp_critical[i] =
+				i2c_smbus_read_byte_data(client,
+					prog ? THMC50_REG_TEMP_CRITICAL[i]
+					     : THMC50_REG_TEMP_DEFAULT[i]);
+		}
+		data->analog_out =
+		    i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT);
+		data->alarms =
+		    i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
+		data->last_updated = jiffies;
+		data->valid = true;
+	}
+
+	mutex_unlock(&data->update_lock);
+
+	return data;
+}
+
+static ssize_t analog_out_show(struct device *dev,
+			       struct device_attribute *attr, char *buf)
+{
+	struct thmc50_data *data = thmc50_update_device(dev);
+	return sprintf(buf, "%d\n", data->analog_out);
+}
+
+static ssize_t analog_out_store(struct device *dev,
+				struct device_attribute *attr,
+				const char *buf, size_t count)
+{
+	struct thmc50_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
+	int config;
+	unsigned long tmp;
+	int err;
+
+	err = kstrtoul(buf, 10, &tmp);
+	if (err)
+		return err;
+
+	mutex_lock(&data->update_lock);
+	data->analog_out = clamp_val(tmp, 0, 255);
+	i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
+				  data->analog_out);
+
+	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
+	if (data->analog_out == 0)
+		config &= ~THMC50_REG_CONF_nFANOFF;
+	else
+		config |= THMC50_REG_CONF_nFANOFF;
+	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
+
+	mutex_unlock(&data->update_lock);
+	return count;
+}
+
+/* There is only one PWM mode = DC */
+static ssize_t pwm_mode_show(struct device *dev,
+			     struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "0\n");
+}
+
+/* Temperatures */
+static ssize_t temp_show(struct device *dev, struct device_attribute *attr,
+			 char *buf)
+{
+	int nr = to_sensor_dev_attr(attr)->index;
+	struct thmc50_data *data = thmc50_update_device(dev);
+	return sprintf(buf, "%d\n", data->temp_input[nr] * 1000);
+}
+
+static ssize_t temp_min_show(struct device *dev,
+			     struct device_attribute *attr, char *buf)
+{
+	int nr = to_sensor_dev_attr(attr)->index;
+	struct thmc50_data *data = thmc50_update_device(dev);
+	return sprintf(buf, "%d\n", data->temp_min[nr] * 1000);
+}
+
+static ssize_t temp_min_store(struct device *dev,
+			      struct device_attribute *attr, const char *buf,
+			      size_t count)
+{
+	int nr = to_sensor_dev_attr(attr)->index;
+	struct thmc50_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
+	long val;
+	int err;
+
+	err = kstrtol(buf, 10, &val);
+	if (err)
+		return err;
+
+	mutex_lock(&data->update_lock);
+	data->temp_min[nr] = clamp_val(val / 1000, -128, 127);
+	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr],
+				  data->temp_min[nr]);
+	mutex_unlock(&data->update_lock);
+	return count;
+}
+
+static ssize_t temp_max_show(struct device *dev,
+			     struct device_attribute *attr, char *buf)
+{
+	int nr = to_sensor_dev_attr(attr)->index;
+	struct thmc50_data *data = thmc50_update_device(dev);
+	return sprintf(buf, "%d\n", data->temp_max[nr] * 1000);
+}
+
+static ssize_t temp_max_store(struct device *dev,
+			      struct device_attribute *attr, const char *buf,
+			      size_t count)
+{
+	int nr = to_sensor_dev_attr(attr)->index;
+	struct thmc50_data *data = dev_get_drvdata(dev);
+	struct i2c_client *client = data->client;
+	long val;
+	int err;
+
+	err = kstrtol(buf, 10, &val);
+	if (err)
+		return err;
+
+	mutex_lock(&data->update_lock);
+	data->temp_max[nr] = clamp_val(val / 1000, -128, 127);
+	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr],
+				  data->temp_max[nr]);
+	mutex_unlock(&data->update_lock);
+	return count;
+}
+
+static ssize_t temp_critical_show(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	int nr = to_sensor_dev_attr(attr)->index;
+	struct thmc50_data *data = thmc50_update_device(dev);
+	return sprintf(buf, "%d\n", data->temp_critical[nr] * 1000);
+}
+
+static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
+			  char *buf)
+{
+	int index = to_sensor_dev_attr(attr)->index;
+	struct thmc50_data *data = thmc50_update_device(dev);
+
+	return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
+}
+
+static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
+static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0);
+static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
+static SENSOR_DEVICE_ATTR_RO(temp1_crit, temp_critical, 0);
+static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
+static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1);
+static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
+static SENSOR_DEVICE_ATTR_RO(temp2_crit, temp_critical, 1);
+static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
+static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2);
+static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2);
+static SENSOR_DEVICE_ATTR_RO(temp3_crit, temp_critical, 2);
+
+static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 0);
+static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 5);
+static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 1);
+static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 7);
+static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 2);
+
+static SENSOR_DEVICE_ATTR_RW(pwm1, analog_out, 0);
+static SENSOR_DEVICE_ATTR_RO(pwm1_mode, pwm_mode, 0);
+
+static struct attribute *thmc50_attributes[] = {
+	&sensor_dev_attr_temp1_max.dev_attr.attr,
+	&sensor_dev_attr_temp1_min.dev_attr.attr,
+	&sensor_dev_attr_temp1_input.dev_attr.attr,
+	&sensor_dev_attr_temp1_crit.dev_attr.attr,
+	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
+	&sensor_dev_attr_temp2_max.dev_attr.attr,
+	&sensor_dev_attr_temp2_min.dev_attr.attr,
+	&sensor_dev_attr_temp2_input.dev_attr.attr,
+	&sensor_dev_attr_temp2_crit.dev_attr.attr,
+	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
+	&sensor_dev_attr_temp2_fault.dev_attr.attr,
+	&sensor_dev_attr_pwm1.dev_attr.attr,
+	&sensor_dev_attr_pwm1_mode.dev_attr.attr,
+	NULL
+};
+
+static const struct attribute_group thmc50_group = {
+	.attrs = thmc50_attributes,
+};
+
+/* for ADM1022 3rd temperature mode */
+static struct attribute *temp3_attributes[] = {
+	&sensor_dev_attr_temp3_max.dev_attr.attr,
+	&sensor_dev_attr_temp3_min.dev_attr.attr,
+	&sensor_dev_attr_temp3_input.dev_attr.attr,
+	&sensor_dev_attr_temp3_crit.dev_attr.attr,
+	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
+	&sensor_dev_attr_temp3_fault.dev_attr.attr,
+	NULL
+};
+
+static const struct attribute_group temp3_group = {
+	.attrs = temp3_attributes,
+};
+
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int thmc50_detect(struct i2c_client *client,
+			 struct i2c_board_info *info)
+{
+	unsigned company;
+	unsigned revision;
+	unsigned config;
+	struct i2c_adapter *adapter = client->adapter;
+	const char *type_name;
+
+	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
+		pr_debug("thmc50: detect failed, smbus byte data not supported!\n");
+		return -ENODEV;
+	}
+
+	pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n",
+		 client->addr, i2c_adapter_id(client->adapter));
+
+	company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID);
+	revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE);
+	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
+	if (revision < 0xc0 || (config & 0x10))
+		return -ENODEV;
+
+	if (company == 0x41) {
+		int id = i2c_adapter_id(client->adapter);
+		int i;
+
+		type_name = "adm1022";
+		for (i = 0; i + 1 < adm1022_temp3_num; i += 2)
+			if (adm1022_temp3[i] == id &&
+			    adm1022_temp3[i + 1] == client->addr) {
+				/* enable 2nd remote temp */
+				config |= (1 << 7);
+				i2c_smbus_write_byte_data(client,
+							  THMC50_REG_CONF,
+							  config);
+				break;
+			}
+	} else if (company == 0x49) {
+		type_name = "thmc50";
+	} else {
+		pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n");
+		return -ENODEV;
+	}
+
+	pr_debug("thmc50: Detected %s (version %x, revision %x)\n",
+		 type_name, (revision >> 4) - 0xc, revision & 0xf);
+
+	strscpy(info->type, type_name, I2C_NAME_SIZE);
+
+	return 0;
+}
+
+static void thmc50_init_client(struct thmc50_data *data)
+{
+	struct i2c_client *client = data->client;
+	int config;
+
+	data->analog_out = i2c_smbus_read_byte_data(client,
+						    THMC50_REG_ANALOG_OUT);
+	/* set up to at least 1 */
+	if (data->analog_out == 0) {
+		data->analog_out = 1;
+		i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
+					  data->analog_out);
+	}
+	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
+	config |= 0x1;	/* start the chip if it is in standby mode */
+	if (data->type == adm1022 && (config & (1 << 7)))
+		data->has_temp3 = 1;
+	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
+}
+
+static const struct i2c_device_id thmc50_id[];
+
+static int thmc50_probe(struct i2c_client *client)
+{
+	struct device *dev = &client->dev;
+	struct thmc50_data *data;
+	struct device *hwmon_dev;
+	int idx = 0;
+
+	data = devm_kzalloc(dev, sizeof(struct thmc50_data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->client = client;
+	data->type = i2c_match_id(thmc50_id, client)->driver_data;
+	mutex_init(&data->update_lock);
+
+	thmc50_init_client(data);
+
+	/* sysfs hooks */
+	data->groups[idx++] = &thmc50_group;
+
+	/* Register additional ADM1022 sysfs hooks */
+	if (data->has_temp3)
+		data->groups[idx++] = &temp3_group;
+
+	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
+							   data, data->groups);
+	return PTR_ERR_OR_ZERO(hwmon_dev);
+}
+
+static const struct i2c_device_id thmc50_id[] = {
+	{ "adm1022", adm1022 },
+	{ "thmc50", thmc50 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, thmc50_id);
+
+static struct i2c_driver thmc50_driver = {
+	.class = I2C_CLASS_HWMON,
+	.driver = {
+		.name = "thmc50",
+	},
+	.probe_new = thmc50_probe,
+	.id_table = thmc50_id,
+	.detect = thmc50_detect,
+	.address_list = normal_i2c,
+};
+
+module_i2c_driver(thmc50_driver);
+
+MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
+MODULE_DESCRIPTION("THMC50 driver");