/* * 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> * * 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ #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 */ char valid; /* !=0 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 = 1; } mutex_unlock(&data->update_lock); return data; } static ssize_t show_analog_out(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 set_analog_out(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 show_pwm_mode(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "0\n"); } /* Temperatures */ static ssize_t show_temp(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 show_temp_min(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 set_temp_min(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 show_temp_max(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 set_temp_max(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 show_temp_critical(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 show_alarm(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); } #define temp_reg(offset) \ static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp, \ NULL, offset - 1); \ static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ show_temp_min, set_temp_min, offset - 1); \ static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ show_temp_max, set_temp_max, offset - 1); \ static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO, \ show_temp_critical, NULL, offset - 1); temp_reg(1); temp_reg(2); temp_reg(3); static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0); static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1); static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 7); static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2); static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_analog_out, set_analog_out, 0); static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 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); strlcpy(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 int thmc50_probe(struct i2c_client *client, const struct i2c_device_id *id) { 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 = id->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 = 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");