| /* |
| adm1021.c - Part of lm_sensors, Linux kernel modules for hardware |
| monitoring |
| Copyright (c) 1998, 1999 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/jiffies.h> |
| #include <linux/i2c.h> |
| #include <linux/i2c-sensor.h> |
| #include <linux/hwmon.h> |
| #include <linux/err.h> |
| |
| |
| /* Addresses to scan */ |
| static unsigned short normal_i2c[] = { 0x18, 0x19, 0x1a, |
| 0x29, 0x2a, 0x2b, |
| 0x4c, 0x4d, 0x4e, |
| I2C_CLIENT_END }; |
| |
| /* Insmod parameters */ |
| SENSORS_INSMOD_8(adm1021, adm1023, max1617, max1617a, thmc10, lm84, gl523sm, mc1066); |
| |
| /* adm1021 constants specified below */ |
| |
| /* The adm1021 registers */ |
| /* Read-only */ |
| #define ADM1021_REG_TEMP 0x00 |
| #define ADM1021_REG_REMOTE_TEMP 0x01 |
| #define ADM1021_REG_STATUS 0x02 |
| #define ADM1021_REG_MAN_ID 0x0FE /* 0x41 = AMD, 0x49 = TI, 0x4D = Maxim, 0x23 = Genesys , 0x54 = Onsemi*/ |
| #define ADM1021_REG_DEV_ID 0x0FF /* ADM1021 = 0x0X, ADM1023 = 0x3X */ |
| #define ADM1021_REG_DIE_CODE 0x0FF /* MAX1617A */ |
| /* These use different addresses for reading/writing */ |
| #define ADM1021_REG_CONFIG_R 0x03 |
| #define ADM1021_REG_CONFIG_W 0x09 |
| #define ADM1021_REG_CONV_RATE_R 0x04 |
| #define ADM1021_REG_CONV_RATE_W 0x0A |
| /* These are for the ADM1023's additional precision on the remote temp sensor */ |
| #define ADM1021_REG_REM_TEMP_PREC 0x010 |
| #define ADM1021_REG_REM_OFFSET 0x011 |
| #define ADM1021_REG_REM_OFFSET_PREC 0x012 |
| #define ADM1021_REG_REM_TOS_PREC 0x013 |
| #define ADM1021_REG_REM_THYST_PREC 0x014 |
| /* limits */ |
| #define ADM1021_REG_TOS_R 0x05 |
| #define ADM1021_REG_TOS_W 0x0B |
| #define ADM1021_REG_REMOTE_TOS_R 0x07 |
| #define ADM1021_REG_REMOTE_TOS_W 0x0D |
| #define ADM1021_REG_THYST_R 0x06 |
| #define ADM1021_REG_THYST_W 0x0C |
| #define ADM1021_REG_REMOTE_THYST_R 0x08 |
| #define ADM1021_REG_REMOTE_THYST_W 0x0E |
| /* write-only */ |
| #define ADM1021_REG_ONESHOT 0x0F |
| |
| |
| /* Conversions. Rounding and limit checking is only done on the TO_REG |
| variants. Note that you should be a bit careful with which arguments |
| these macros are called: arguments may be evaluated more than once. |
| Fixing this is just not worth it. */ |
| /* Conversions note: 1021 uses normal integer signed-byte format*/ |
| #define TEMP_FROM_REG(val) (val > 127 ? (val-256)*1000 : val*1000) |
| #define TEMP_TO_REG(val) (SENSORS_LIMIT((val < 0 ? (val/1000)+256 : val/1000),0,255)) |
| |
| /* Initial values */ |
| |
| /* Note: Even though I left the low and high limits named os and hyst, |
| they don't quite work like a thermostat the way the LM75 does. I.e., |
| a lower temp than THYST actually triggers an alarm instead of |
| clearing it. Weird, ey? --Phil */ |
| |
| /* Each client has this additional data */ |
| struct adm1021_data { |
| struct i2c_client client; |
| struct class_device *class_dev; |
| enum chips type; |
| |
| struct semaphore update_lock; |
| char valid; /* !=0 if following fields are valid */ |
| unsigned long last_updated; /* In jiffies */ |
| |
| u8 temp_max; /* Register values */ |
| u8 temp_hyst; |
| u8 temp_input; |
| u8 remote_temp_max; |
| u8 remote_temp_hyst; |
| u8 remote_temp_input; |
| u8 alarms; |
| /* Special values for ADM1023 only */ |
| u8 remote_temp_prec; |
| u8 remote_temp_os_prec; |
| u8 remote_temp_hyst_prec; |
| u8 remote_temp_offset; |
| u8 remote_temp_offset_prec; |
| }; |
| |
| static int adm1021_attach_adapter(struct i2c_adapter *adapter); |
| static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind); |
| static void adm1021_init_client(struct i2c_client *client); |
| static int adm1021_detach_client(struct i2c_client *client); |
| static int adm1021_read_value(struct i2c_client *client, u8 reg); |
| static int adm1021_write_value(struct i2c_client *client, u8 reg, |
| u16 value); |
| static struct adm1021_data *adm1021_update_device(struct device *dev); |
| |
| /* (amalysh) read only mode, otherwise any limit's writing confuse BIOS */ |
| static int read_only = 0; |
| |
| |
| /* This is the driver that will be inserted */ |
| static struct i2c_driver adm1021_driver = { |
| .owner = THIS_MODULE, |
| .name = "adm1021", |
| .id = I2C_DRIVERID_ADM1021, |
| .flags = I2C_DF_NOTIFY, |
| .attach_adapter = adm1021_attach_adapter, |
| .detach_client = adm1021_detach_client, |
| }; |
| |
| #define show(value) \ |
| static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf) \ |
| { \ |
| struct adm1021_data *data = adm1021_update_device(dev); \ |
| return sprintf(buf, "%d\n", TEMP_FROM_REG(data->value)); \ |
| } |
| show(temp_max); |
| show(temp_hyst); |
| show(temp_input); |
| show(remote_temp_max); |
| show(remote_temp_hyst); |
| show(remote_temp_input); |
| |
| #define show2(value) \ |
| static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf) \ |
| { \ |
| struct adm1021_data *data = adm1021_update_device(dev); \ |
| return sprintf(buf, "%d\n", data->value); \ |
| } |
| show2(alarms); |
| |
| #define set(value, reg) \ |
| static ssize_t set_##value(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
| { \ |
| struct i2c_client *client = to_i2c_client(dev); \ |
| struct adm1021_data *data = i2c_get_clientdata(client); \ |
| int temp = simple_strtoul(buf, NULL, 10); \ |
| \ |
| down(&data->update_lock); \ |
| data->value = TEMP_TO_REG(temp); \ |
| adm1021_write_value(client, reg, data->value); \ |
| up(&data->update_lock); \ |
| return count; \ |
| } |
| set(temp_max, ADM1021_REG_TOS_W); |
| set(temp_hyst, ADM1021_REG_THYST_W); |
| set(remote_temp_max, ADM1021_REG_REMOTE_TOS_W); |
| set(remote_temp_hyst, ADM1021_REG_REMOTE_THYST_W); |
| |
| static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, set_temp_max); |
| static DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_hyst, set_temp_hyst); |
| static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL); |
| static DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_remote_temp_max, set_remote_temp_max); |
| static DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_remote_temp_hyst, set_remote_temp_hyst); |
| static DEVICE_ATTR(temp2_input, S_IRUGO, show_remote_temp_input, NULL); |
| static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
| |
| |
| static int adm1021_attach_adapter(struct i2c_adapter *adapter) |
| { |
| if (!(adapter->class & I2C_CLASS_HWMON)) |
| return 0; |
| return i2c_detect(adapter, &addr_data, adm1021_detect); |
| } |
| |
| static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind) |
| { |
| int i; |
| struct i2c_client *new_client; |
| struct adm1021_data *data; |
| int err = 0; |
| const char *type_name = ""; |
| |
| /* Make sure we aren't probing the ISA bus!! This is just a safety check |
| at this moment; i2c_detect really won't call us. */ |
| #ifdef DEBUG |
| if (i2c_is_isa_adapter(adapter)) { |
| dev_dbg(&adapter->dev, "adm1021_detect called for an ISA bus adapter?!?\n"); |
| return 0; |
| } |
| #endif |
| |
| if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
| goto error0; |
| |
| /* OK. For now, we presume we have a valid client. We now create the |
| client structure, even though we cannot fill it completely yet. |
| But it allows us to access adm1021_{read,write}_value. */ |
| |
| if (!(data = kmalloc(sizeof(struct adm1021_data), GFP_KERNEL))) { |
| err = -ENOMEM; |
| goto error0; |
| } |
| memset(data, 0, sizeof(struct adm1021_data)); |
| |
| new_client = &data->client; |
| i2c_set_clientdata(new_client, data); |
| new_client->addr = address; |
| new_client->adapter = adapter; |
| new_client->driver = &adm1021_driver; |
| new_client->flags = 0; |
| |
| /* Now, we do the remaining detection. */ |
| if (kind < 0) { |
| if ((adm1021_read_value(new_client, ADM1021_REG_STATUS) & 0x03) != 0x00 |
| || (adm1021_read_value(new_client, ADM1021_REG_CONFIG_R) & 0x3F) != 0x00 |
| || (adm1021_read_value(new_client, ADM1021_REG_CONV_RATE_R) & 0xF8) != 0x00) { |
| err = -ENODEV; |
| goto error1; |
| } |
| } |
| |
| /* Determine the chip type. */ |
| if (kind <= 0) { |
| i = adm1021_read_value(new_client, ADM1021_REG_MAN_ID); |
| if (i == 0x41) |
| if ((adm1021_read_value(new_client, ADM1021_REG_DEV_ID) & 0x0F0) == 0x030) |
| kind = adm1023; |
| else |
| kind = adm1021; |
| else if (i == 0x49) |
| kind = thmc10; |
| else if (i == 0x23) |
| kind = gl523sm; |
| else if ((i == 0x4d) && |
| (adm1021_read_value(new_client, ADM1021_REG_DEV_ID) == 0x01)) |
| kind = max1617a; |
| else if (i == 0x54) |
| kind = mc1066; |
| /* LM84 Mfr ID in a different place, and it has more unused bits */ |
| else if (adm1021_read_value(new_client, ADM1021_REG_CONV_RATE_R) == 0x00 |
| && (kind == 0 /* skip extra detection */ |
| || ((adm1021_read_value(new_client, ADM1021_REG_CONFIG_R) & 0x7F) == 0x00 |
| && (adm1021_read_value(new_client, ADM1021_REG_STATUS) & 0xAB) == 0x00))) |
| kind = lm84; |
| else |
| kind = max1617; |
| } |
| |
| if (kind == max1617) { |
| type_name = "max1617"; |
| } else if (kind == max1617a) { |
| type_name = "max1617a"; |
| } else if (kind == adm1021) { |
| type_name = "adm1021"; |
| } else if (kind == adm1023) { |
| type_name = "adm1023"; |
| } else if (kind == thmc10) { |
| type_name = "thmc10"; |
| } else if (kind == lm84) { |
| type_name = "lm84"; |
| } else if (kind == gl523sm) { |
| type_name = "gl523sm"; |
| } else if (kind == mc1066) { |
| type_name = "mc1066"; |
| } |
| |
| /* Fill in the remaining client fields and put it into the global list */ |
| strlcpy(new_client->name, type_name, I2C_NAME_SIZE); |
| data->type = kind; |
| data->valid = 0; |
| init_MUTEX(&data->update_lock); |
| |
| /* Tell the I2C layer a new client has arrived */ |
| if ((err = i2c_attach_client(new_client))) |
| goto error1; |
| |
| /* Initialize the ADM1021 chip */ |
| if (kind != lm84) |
| adm1021_init_client(new_client); |
| |
| /* Register sysfs hooks */ |
| data->class_dev = hwmon_device_register(&new_client->dev); |
| if (IS_ERR(data->class_dev)) { |
| err = PTR_ERR(data->class_dev); |
| goto error2; |
| } |
| |
| device_create_file(&new_client->dev, &dev_attr_temp1_max); |
| device_create_file(&new_client->dev, &dev_attr_temp1_min); |
| device_create_file(&new_client->dev, &dev_attr_temp1_input); |
| device_create_file(&new_client->dev, &dev_attr_temp2_max); |
| device_create_file(&new_client->dev, &dev_attr_temp2_min); |
| device_create_file(&new_client->dev, &dev_attr_temp2_input); |
| device_create_file(&new_client->dev, &dev_attr_alarms); |
| |
| return 0; |
| |
| error2: |
| i2c_detach_client(new_client); |
| error1: |
| kfree(data); |
| error0: |
| return err; |
| } |
| |
| static void adm1021_init_client(struct i2c_client *client) |
| { |
| /* Enable ADC and disable suspend mode */ |
| adm1021_write_value(client, ADM1021_REG_CONFIG_W, |
| adm1021_read_value(client, ADM1021_REG_CONFIG_R) & 0xBF); |
| /* Set Conversion rate to 1/sec (this can be tinkered with) */ |
| adm1021_write_value(client, ADM1021_REG_CONV_RATE_W, 0x04); |
| } |
| |
| static int adm1021_detach_client(struct i2c_client *client) |
| { |
| struct adm1021_data *data = i2c_get_clientdata(client); |
| int err; |
| |
| hwmon_device_unregister(data->class_dev); |
| |
| if ((err = i2c_detach_client(client))) { |
| dev_err(&client->dev, "Client deregistration failed, client not detached.\n"); |
| return err; |
| } |
| |
| kfree(data); |
| return 0; |
| } |
| |
| /* All registers are byte-sized */ |
| static int adm1021_read_value(struct i2c_client *client, u8 reg) |
| { |
| return i2c_smbus_read_byte_data(client, reg); |
| } |
| |
| static int adm1021_write_value(struct i2c_client *client, u8 reg, u16 value) |
| { |
| if (!read_only) |
| return i2c_smbus_write_byte_data(client, reg, value); |
| return 0; |
| } |
| |
| static struct adm1021_data *adm1021_update_device(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct adm1021_data *data = i2c_get_clientdata(client); |
| |
| down(&data->update_lock); |
| |
| if (time_after(jiffies, data->last_updated + HZ + HZ / 2) |
| || !data->valid) { |
| dev_dbg(&client->dev, "Starting adm1021 update\n"); |
| |
| data->temp_input = adm1021_read_value(client, ADM1021_REG_TEMP); |
| data->temp_max = adm1021_read_value(client, ADM1021_REG_TOS_R); |
| data->temp_hyst = adm1021_read_value(client, ADM1021_REG_THYST_R); |
| data->remote_temp_input = adm1021_read_value(client, ADM1021_REG_REMOTE_TEMP); |
| data->remote_temp_max = adm1021_read_value(client, ADM1021_REG_REMOTE_TOS_R); |
| data->remote_temp_hyst = adm1021_read_value(client, ADM1021_REG_REMOTE_THYST_R); |
| data->alarms = adm1021_read_value(client, ADM1021_REG_STATUS) & 0x7c; |
| if (data->type == adm1023) { |
| data->remote_temp_prec = adm1021_read_value(client, ADM1021_REG_REM_TEMP_PREC); |
| data->remote_temp_os_prec = adm1021_read_value(client, ADM1021_REG_REM_TOS_PREC); |
| data->remote_temp_hyst_prec = adm1021_read_value(client, ADM1021_REG_REM_THYST_PREC); |
| data->remote_temp_offset = adm1021_read_value(client, ADM1021_REG_REM_OFFSET); |
| data->remote_temp_offset_prec = adm1021_read_value(client, ADM1021_REG_REM_OFFSET_PREC); |
| } |
| data->last_updated = jiffies; |
| data->valid = 1; |
| } |
| |
| up(&data->update_lock); |
| |
| return data; |
| } |
| |
| static int __init sensors_adm1021_init(void) |
| { |
| return i2c_add_driver(&adm1021_driver); |
| } |
| |
| static void __exit sensors_adm1021_exit(void) |
| { |
| i2c_del_driver(&adm1021_driver); |
| } |
| |
| MODULE_AUTHOR ("Frodo Looijaard <frodol@dds.nl> and " |
| "Philip Edelbrock <phil@netroedge.com>"); |
| MODULE_DESCRIPTION("adm1021 driver"); |
| MODULE_LICENSE("GPL"); |
| |
| module_param(read_only, bool, 0); |
| MODULE_PARM_DESC(read_only, "Don't set any values, read only mode"); |
| |
| module_init(sensors_adm1021_init) |
| module_exit(sensors_adm1021_exit) |