The driver supports the Sensylink CTF2304.
Signed-off-by: Il Han <corone.il.han@xxxxxxxxx>
---
Documentation/hwmon/ctf2304.rst | 41 +++
Documentation/hwmon/index.rst | 1 +
drivers/hwmon/Kconfig | 10 +
drivers/hwmon/Makefile | 1 +
drivers/hwmon/ctf2304.c | 522 ++++++++++++++++++++++++++++++++
5 files changed, 575 insertions(+)
create mode 100644 Documentation/hwmon/ctf2304.rst
create mode 100644 drivers/hwmon/ctf2304.c
diff --git a/Documentation/hwmon/ctf2304.rst b/Documentation/hwmon/ctf2304.rst
new file mode 100644
index 000000000000..e1584524d612
--- /dev/null
+++ b/Documentation/hwmon/ctf2304.rst
@@ -0,0 +1,41 @@
+.. SPDX-License-Identifier: GPL-2.0-or-later
+
+Kernel driver ctf2304
+=====================
+
+Supported chips:
+
+ * Sensylink CTF2304
+
+ Prefix: 'ctf2304'
+
+ Addresses scanned: -
+
+ Datasheet:
+
+Author: Il Han <corone.il.han@xxxxxxxxx>
+
+
+Description
+-----------
+
+This driver implements support for the Sensylink CTF2304 chip.
+
+The CTF2304 controls the speeds of up to four fans using four independent
+PWM outputs with local and remote temperature and remote voltage sensing.
+
+
+Sysfs entries
+-------------
+
+================== === =======================================================
+fan[1-4]_input RO fan tachometer speed in RPM
+fan[1-4]_target RW desired fan speed in RPM
+fan[1-4]_div RW sets the RPM range of the fan
+pwm[1-4]_enable RW regulator mode,
+ 0=auto temperature mode, 1=manual mode, 2=rpm mode
+pwm[1-4] RW read: current pwm duty cycle,
+ write: target pwm duty cycle (0-255)
+in[0-7]_input RO measured output voltage
+temp[1-9]_input RO measured temperature
+================== === =======================================================
diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst
index f1fe75f596a5..a74cd43a3916 100644
--- a/Documentation/hwmon/index.rst
+++ b/Documentation/hwmon/index.rst
@@ -54,6 +54,7 @@ Hardware Monitoring Kernel Drivers
coretemp
corsair-cpro
corsair-psu
+ ctf2304
da9052
da9055
dell-smm-hwmon
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 5b3b76477b0e..da9fbb0f8af3 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -474,6 +474,16 @@ config SENSORS_CORSAIR_PSU
This driver can also be built as a module. If so, the module
will be called corsair-psu.
+config SENSORS_CTF2304
+ tristate "Sensylink CTF2304 sensor chip"
+ depends on I2C
+ help
+ If you say yes here you get support for PWM and Fan Controller
+ with temperature and voltage sensing.
+
+ This driver can also be built as a module. If so, the module
+ will be called ctf2304.
+
config SENSORS_DRIVETEMP
tristate "Hard disk drives with temperature sensors"
depends on SCSI && ATA
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 88712b5031c8..3742b52f032d 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -60,6 +60,7 @@ obj-$(CONFIG_SENSORS_BT1_PVT) += bt1-pvt.o
obj-$(CONFIG_SENSORS_CORETEMP) += coretemp.o
obj-$(CONFIG_SENSORS_CORSAIR_CPRO) += corsair-cpro.o
obj-$(CONFIG_SENSORS_CORSAIR_PSU) += corsair-psu.o
+obj-$(CONFIG_SENSORS_CTF2304) += ctf2304.o
obj-$(CONFIG_SENSORS_DA9052_ADC)+= da9052-hwmon.o
obj-$(CONFIG_SENSORS_DA9055)+= da9055-hwmon.o
obj-$(CONFIG_SENSORS_DELL_SMM) += dell-smm-hwmon.o
diff --git a/drivers/hwmon/ctf2304.c b/drivers/hwmon/ctf2304.c
new file mode 100644
index 000000000000..102c41957219
--- /dev/null
+++ b/drivers/hwmon/ctf2304.c
@@ -0,0 +1,522 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * ctf2304.c - Part of lm_sensors, Linux kernel modules for hardware
+ * monitoring.
+ *
+ * (C) 2023 by Il Han <corone.il.han@xxxxxxxxx>
+ */
+
+#include <linux/err.h>
+#include <linux/hwmon.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/jiffies.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+/* CTF2304 registers */
+#define CTF2304_REG_LOCAL_TEMP 0x00
+#define CTF2304_REG_REMOTE_CHANNEL(ch) (0x01 + (ch))
+#define CTF2304_REG_TACH_COUNT(ch) (0x09 + (ch))
+#define CTF2304_REG_FAN_CONFIG1 0x10
+#define CTF2304_REG_FAN_CONFIG2 0x11
+#define CTF2304_REG_FAN_RPM_CTRL 0x18
+#define CTF2304_REG_PWMOUT(ch) (0x40 + (ch))
+#define CTF2304_REG_TARGET_COUNT(ch) (0x44 + (ch))
+
+/* Fan Configure1 register bits */
+#define CTF2304_FAN_CFG1_TRANGE 0x0400
+#define CTF2304_FAN_CFG1_MODE_MASK (0x7)
+#define CTF2304_FAN_CFG1_MODE_SHIFT 7
+
+/* Fan Configure2 register bits */
+#define CTF2304_FAN_CFG2_MODE_MASK(ch) (0x6 << (ch) * 4)
+#define CTF2304_FAN_CFG2_MODE_SHIFT(ch) (1 + (ch) * 4)
+#define CTF2304_FAN_CFG2_DCY_MODE 0
+#define CTF2304_FAN_CFG2_RPM_MODE 1
+#define CTF2304_FAN_CFG2_TEMP_MODE 2
+#define CTF2304_FAN_CFG2_MAX_MODE 3
+
+/* Fan RPM CTRL register bits */
+#define CTF2304_FAN_DIV_MASK(ch) (0x6 << (ch) * 4)
+#define CTF2304_FAN_DIV_SHIFT(ch) (1 + (ch) * 4)
+
+#define CTF2304_VCC 3300
+
+#define FAN_RPM_MIN 480
+#define FAN_RPM_MAX 1966080
+
+#define FAN_COUNT_REG_MAX 0xFFF0
+
+#define TEMP_FROM_REG(reg, tr) ((tr) ? \
+ (((((reg) & 0x7FF0) * 1000) >> 8) \
+ + ((reg) >> 15) ? -64000 : 0) : \
+ (((reg) * 1000) >> 8))
+#define VOLT_FROM_REG(reg, fs) ((((reg) >> 4) * (fs)) >> 12)
+#define DIV_FROM_REG(reg) (1 << (reg))
+#define DIV_TO_REG(div) ((div == 8) ? 0x3 : \
+ (div == 4) ? 0x2 : \
+ (div == 1) ? 0x0 : 0x1)
+#define RPM_FROM_REG(reg) (((reg) >> 4) ? \
+ ((32768 * 60) / ((reg) >> 4)) : \
+ FAN_RPM_MAX)
+#define RPM_TO_REG(rpm) ((rpm) ? \
+ ((32768 * 60) / (rpm)) : \
+ FAN_COUNT_REG_MAX)
+
+#define NR_CHANNEL 8
+#define NR_FAN_CHANNEL 4
+
+/*
+ * Client data (each client gets its own)
+ */
+struct ctf2304_data {
+ struct i2c_client *client;
+ struct mutex update_lock;
+ char valid; /* zero until following fields are valid */
+ unsigned long last_updated; /* in jiffies */
+
+ /* register values */
+ u16 local_temp;
+ u16 remote_channel[NR_CHANNEL];
+ u16 tach[NR_FAN_CHANNEL];
+ u16 fan_config1;
+ u16 fan_config2;
+ u16 fan_rpm_ctrl;
+ u16 pwm[NR_FAN_CHANNEL];
+ u16 target_count[NR_FAN_CHANNEL];
+};
+
+static struct ctf2304_data *ctf2304_update_device(struct device *dev)
+{
+ struct ctf2304_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ struct ctf2304_data *ret = data;
+ int i;
+ int rv;
+
+ mutex_lock(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
+ rv = i2c_smbus_read_word_swapped(client,
+ CTF2304_REG_LOCAL_TEMP);
+ if (rv < 0)
+ goto abort;
+ data->local_temp = rv;
+
+ for (i = 0; i < NR_CHANNEL; i++) {
+ rv = i2c_smbus_read_word_swapped(client,
+ CTF2304_REG_REMOTE_CHANNEL(i));
+ if (rv < 0)
+ goto abort;
+ data->remote_channel[i] = rv;
+ }
+
+ rv = i2c_smbus_read_word_swapped(client,
+ CTF2304_REG_FAN_CONFIG1);
+ if (rv < 0)
+ goto abort;
+ data->fan_config1 = rv;
+ rv = i2c_smbus_read_word_swapped(client,
+ CTF2304_REG_FAN_CONFIG2);
+ if (rv < 0)
+ goto abort;
+ data->fan_config2 = rv;
+ rv = i2c_smbus_read_word_swapped(client,
+ CTF2304_REG_FAN_RPM_CTRL);
+ if (rv < 0)
+ goto abort;
+ data->fan_rpm_ctrl = rv;
+
+ for (i = 0; i < NR_FAN_CHANNEL; i++) {
+ rv = i2c_smbus_read_word_swapped(client,
+ CTF2304_REG_TACH_COUNT(i));
+ if (rv < 0)
+ goto abort;
+ data->tach[i] = rv;
+ rv = i2c_smbus_read_word_swapped(client,
+ CTF2304_REG_PWMOUT(i));
+ if (rv < 0)
+ goto abort;
+ data->pwm[i] = rv;
+ rv = i2c_smbus_read_word_swapped(client,
+ CTF2304_REG_TARGET_COUNT(i));
+ if (rv < 0)
+ goto abort;
+ data->target_count[i] = rv;
+ }
+
+ data->last_updated = jiffies;
+ data->valid = true;
+ }
+ goto done;
+
+abort:
+ data->valid = false;
+ ret = ERR_PTR(rv);
+
+done:
+ mutex_unlock(&data->update_lock);
+
+ return data;
+}
+
+static int ctf2304_read_temp(struct device *dev, u32 attr, int channel,
+ long *val)
+{
+ struct ctf2304_data *data = ctf2304_update_device(dev);
+ u16 reg;
+
+ switch (attr) {
+ case hwmon_temp_input:
+ if (channel == 0)
+ reg = data->local_temp;
+ else
+ reg = data->remote_channel[channel-1];
+ *val = TEMP_FROM_REG(reg, (data->fan_config1
+ & CTF2304_FAN_CFG1_TRANGE));
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int get_full_scale(u16 config)
+{
+ int full_scale;
+ u8 bits;
+
+ bits = (config >> CTF2304_FAN_CFG1_MODE_SHIFT)
+ & CTF2304_FAN_CFG1_MODE_MASK;
+
+ if (bits == 0x0)
+ full_scale = 2560;
+ else if (bits == 0x1)
+ full_scale = CTF2304_VCC;
+ else if (bits == 0x2)
+ full_scale = 4096;
+ else if (bits == 0x3)
+ full_scale = 2048;
+ else if (bits == 0x4)
+ full_scale = 1024;
+ else if (bits == 0x5)
+ full_scale = 512;
+ else
+ full_scale = 256;
+
+ return full_scale;
+}
+
+static int ctf2304_read_in(struct device *dev, u32 attr, int channel,
+ long *val)
+{
+ struct ctf2304_data *data = ctf2304_update_device(dev);
+
+ switch (attr) {
+ case hwmon_temp_input:
+ *val = VOLT_FROM_REG(data->remote_channel[channel],
+ get_full_scale(data->fan_config1));
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int ctf2304_read_fan(struct device *dev, u32 attr, int channel,
+ long *val)
+{
+ struct ctf2304_data *data = ctf2304_update_device(dev);
+ u8 bits;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ switch (attr) {
+ case hwmon_fan_input:
+ if (data->tach[channel] == FAN_COUNT_REG_MAX)
+ *val = 0;
+ else
+ *val = RPM_FROM_REG(data->tach[channel]);
+ return 0;
+ case hwmon_fan_target:
+ *val = RPM_FROM_REG(data->target_count[channel]);
+ return 0;
+ case hwmon_fan_div:
+ bits = (data->fan_rpm_ctrl & CTF2304_FAN_DIV_MASK(channel))
+ >> CTF2304_FAN_DIV_SHIFT(channel);
+ *val = DIV_FROM_REG(bits);
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int ctf2304_write_fan(struct device *dev, u32 attr, int channel,
+ long val)
+{
+ struct ctf2304_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ int target_count;
+ int err = 0;
+
+ mutex_lock(&data->update_lock);
+
+ switch (attr) {
+ case hwmon_fan_target:
+ val = clamp_val(val, FAN_RPM_MIN, FAN_RPM_MAX);
+ target_count = RPM_TO_REG(val);
+ target_count = clamp_val(target_count, 0x1, 0xFFF);
+ data->target_count[channel] = target_count << 4;
+ err = i2c_smbus_write_word_swapped(client,
+ CTF2304_REG_TARGET_COUNT(channel),
+ data->target_count[channel]);
+ break;
+ case hwmon_fan_div:
+ data->fan_rpm_ctrl = (data->fan_rpm_ctrl
+ & ~CTF2304_FAN_DIV_MASK(channel))
+ | (DIV_TO_REG(val)
+ << CTF2304_FAN_DIV_SHIFT(channel));
+ err = i2c_smbus_write_word_swapped(client,
+ CTF2304_REG_FAN_RPM_CTRL,
+ data->fan_rpm_ctrl);
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ mutex_unlock(&data->update_lock);
+
+ return err;
+}
+
+static int ctf2304_read_pwm(struct device *dev, u32 attr, int channel,
+ long *val)
+{
+ struct ctf2304_data *data = ctf2304_update_device(dev);
+ u8 bits;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ switch (attr) {
+ case hwmon_pwm_input:
+ *val = data->pwm[channel] >> 8;
+ return 0;
+ case hwmon_pwm_enable:
+ bits = (data->fan_config2
+ & CTF2304_FAN_CFG2_MODE_MASK(channel))
+ >> CTF2304_FAN_CFG2_MODE_SHIFT(channel);
+ if (bits == CTF2304_FAN_CFG2_RPM_MODE)
+ *val = 2;
+ else if (bits == CTF2304_FAN_CFG2_DCY_MODE)
+ *val = 1;
+ else
+ *val = 0;
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int ctf2304_write_pwm(struct device *dev, u32 attr, int channel,
+ long val)
+{
+ struct ctf2304_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ int err = 0;
+
+ mutex_lock(&data->update_lock);
+
+ switch (attr) {
+ case hwmon_pwm_input:
+ if (val < 0 || val > 255) {
+ err = -EINVAL;
+ break;
+ }
+ data->pwm[channel] = (data->pwm[channel] & 0xFF) | (val << 8);
+ err = i2c_smbus_write_word_swapped(client,
+ CTF2304_REG_PWMOUT(channel),
+ data->pwm[channel]);
+ break;
+ case hwmon_pwm_enable:
+ if (val == 0) {
+ data->fan_config2 = (data->fan_config2
+ & ~CTF2304_FAN_CFG2_MODE_MASK(channel))
+ | (CTF2304_FAN_CFG2_TEMP_MODE
+ << CTF2304_FAN_CFG2_MODE_SHIFT(channel));
+ } else if (val == 1) {
+ data->fan_config2 = (data->fan_config2
+ & ~CTF2304_FAN_CFG2_MODE_MASK(channel))
+ | (CTF2304_FAN_CFG2_DCY_MODE
+ << CTF2304_FAN_CFG2_MODE_SHIFT(channel));
+ } else if (val == 2) {
+ data->fan_config2 = (data->fan_config2
+ & ~CTF2304_FAN_CFG2_MODE_MASK(channel))
+ | (CTF2304_FAN_CFG2_RPM_MODE
+ << CTF2304_FAN_CFG2_MODE_SHIFT(channel));
+ } else {
+ err = -EINVAL;
+ break;
+ }
+ err = i2c_smbus_write_word_swapped(client,
+ CTF2304_REG_FAN_CONFIG2,
+ data->fan_config2);
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ mutex_unlock(&data->update_lock);
+
+ return err;
+}
+
+static int ctf2304_read(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
+{
+ switch (type) {
+ case hwmon_temp:
+ return ctf2304_read_temp(dev, attr, channel, val);
+ case hwmon_in:
+ return ctf2304_read_in(dev, attr, channel, val);
+ case hwmon_fan:
+ return ctf2304_read_fan(dev, attr, channel, val);
+ case hwmon_pwm:
+ return ctf2304_read_pwm(dev, attr, channel, val);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int ctf2304_write(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long val)
+{
+ switch (type) {
+ case hwmon_fan:
+ return ctf2304_write_fan(dev, attr, channel, val);
+ case hwmon_pwm:
+ return ctf2304_write_pwm(dev, attr, channel, val);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static umode_t ctf2304_is_visible(const void *data,
+ enum hwmon_sensor_types type,
+ u32 attr, int channel)
+{
+ switch (type) {
+ case hwmon_temp:
+ case hwmon_in:
+ return 0444;
+ case hwmon_fan:
+ switch (attr) {
+ case hwmon_fan_input:
+ return 0444;
+ case hwmon_fan_target:
+ case hwmon_fan_div:
+ return 0644;
+ default:
+ break;
+ }
+ break;
+ case hwmon_pwm:
+ return 0644;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static const struct hwmon_channel_info *ctf2304_info[] = {
+ HWMON_CHANNEL_INFO(temp,
+ HWMON_T_INPUT,
+ HWMON_T_INPUT,
+ HWMON_T_INPUT,
+ HWMON_T_INPUT,
+ HWMON_T_INPUT,
+ HWMON_T_INPUT,
+ HWMON_T_INPUT,
+ HWMON_T_INPUT,
+ HWMON_T_INPUT),
+ HWMON_CHANNEL_INFO(in,
+ HWMON_I_INPUT,
+ HWMON_I_INPUT,
+ HWMON_I_INPUT,
+ HWMON_I_INPUT,
+ HWMON_I_INPUT,
+ HWMON_I_INPUT,
+ HWMON_I_INPUT,
+ HWMON_I_INPUT),
+ HWMON_CHANNEL_INFO(fan,
+ HWMON_F_INPUT | HWMON_F_TARGET | HWMON_F_DIV,
+ HWMON_F_INPUT | HWMON_F_TARGET | HWMON_F_DIV,
+ HWMON_F_INPUT | HWMON_F_TARGET | HWMON_F_DIV,
+ HWMON_F_INPUT | HWMON_F_TARGET | HWMON_F_DIV),
+ HWMON_CHANNEL_INFO(pwm,
+ HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
+ HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
+ HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
+ HWMON_PWM_INPUT | HWMON_PWM_ENABLE),
+ NULL
+};
+
+static const struct hwmon_ops ctf2304_hwmon_ops = {
+ .is_visible = ctf2304_is_visible,
+ .read = ctf2304_read,
+ .write = ctf2304_write,
+};
+
+static const struct hwmon_chip_info ctf2304_chip_info = {
+ .ops = &ctf2304_hwmon_ops,
+ .info = ctf2304_info,
+};
+
+static int ctf2304_probe(struct i2c_client *client)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ struct device *dev = &client->dev;
+ struct ctf2304_data *data;
+ struct device *hwmon_dev;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
+ return -ENODEV;
+
+ data = devm_kzalloc(dev, sizeof(struct ctf2304_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->client = client;
+ mutex_init(&data->update_lock);
+
+ hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
+ data,
+ &ctf2304_chip_info,
+ NULL);
+
+ return PTR_ERR_OR_ZERO(hwmon_dev);
+}
+
+static const struct i2c_device_id ctf2304_id[] = {
+ { "ctf2304", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ctf2304_id);
+
+static struct i2c_driver ctf2304_driver = {
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = "ctf2304",
+ },
+ .probe_new = ctf2304_probe,
+ .id_table = ctf2304_id,
+};
+
+module_i2c_driver(ctf2304_driver);
+
+MODULE_AUTHOR("Il Han <corone.il.han@xxxxxxxxx>");
+MODULE_DESCRIPTION("CTF2304 sensor driver");
+MODULE_LICENSE("GPL");
--
2.26.3
