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Diffstat (limited to 'drivers/i2c/chips/lm75.c')
-rw-r--r--drivers/i2c/chips/lm75.c296
1 files changed, 0 insertions, 296 deletions
diff --git a/drivers/i2c/chips/lm75.c b/drivers/i2c/chips/lm75.c
deleted file mode 100644
index 5be164e..0000000
--- a/drivers/i2c/chips/lm75.c
+++ /dev/null
@@ -1,296 +0,0 @@
-/*
- lm75.c - Part of lm_sensors, Linux kernel modules for hardware
- monitoring
- Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
-
- 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 "lm75.h"
-
-
-/* Addresses to scan */
-static unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c,
- 0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
-static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
-
-/* Insmod parameters */
-SENSORS_INSMOD_1(lm75);
-
-/* Many LM75 constants specified below */
-
-/* The LM75 registers */
-#define LM75_REG_TEMP 0x00
-#define LM75_REG_CONF 0x01
-#define LM75_REG_TEMP_HYST 0x02
-#define LM75_REG_TEMP_OS 0x03
-
-/* Each client has this additional data */
-struct lm75_data {
- struct i2c_client client;
- struct semaphore update_lock;
- char valid; /* !=0 if following fields are valid */
- unsigned long last_updated; /* In jiffies */
- u16 temp_input; /* Register values */
- u16 temp_max;
- u16 temp_hyst;
-};
-
-static int lm75_attach_adapter(struct i2c_adapter *adapter);
-static int lm75_detect(struct i2c_adapter *adapter, int address, int kind);
-static void lm75_init_client(struct i2c_client *client);
-static int lm75_detach_client(struct i2c_client *client);
-static int lm75_read_value(struct i2c_client *client, u8 reg);
-static int lm75_write_value(struct i2c_client *client, u8 reg, u16 value);
-static struct lm75_data *lm75_update_device(struct device *dev);
-
-
-/* This is the driver that will be inserted */
-static struct i2c_driver lm75_driver = {
- .owner = THIS_MODULE,
- .name = "lm75",
- .id = I2C_DRIVERID_LM75,
- .flags = I2C_DF_NOTIFY,
- .attach_adapter = lm75_attach_adapter,
- .detach_client = lm75_detach_client,
-};
-
-#define show(value) \
-static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf) \
-{ \
- struct lm75_data *data = lm75_update_device(dev); \
- return sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(data->value)); \
-}
-show(temp_max);
-show(temp_hyst);
-show(temp_input);
-
-#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 lm75_data *data = i2c_get_clientdata(client); \
- int temp = simple_strtoul(buf, NULL, 10); \
- \
- down(&data->update_lock); \
- data->value = LM75_TEMP_TO_REG(temp); \
- lm75_write_value(client, reg, data->value); \
- up(&data->update_lock); \
- return count; \
-}
-set(temp_max, LM75_REG_TEMP_OS);
-set(temp_hyst, LM75_REG_TEMP_HYST);
-
-static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, set_temp_max);
-static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hyst, set_temp_hyst);
-static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL);
-
-static int lm75_attach_adapter(struct i2c_adapter *adapter)
-{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_detect(adapter, &addr_data, lm75_detect);
-}
-
-/* This function is called by i2c_detect */
-static int lm75_detect(struct i2c_adapter *adapter, int address, int kind)
-{
- int i;
- struct i2c_client *new_client;
- struct lm75_data *data;
- int err = 0;
- const char *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,
- "lm75_detect called for an ISA bus adapter?!?\n");
- goto exit;
- }
-#endif
-
- if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
- I2C_FUNC_SMBUS_WORD_DATA))
- goto exit;
-
- /* 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 lm75_{read,write}_value. */
- if (!(data = kmalloc(sizeof(struct lm75_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
- }
- memset(data, 0, sizeof(struct lm75_data));
-
- new_client = &data->client;
- i2c_set_clientdata(new_client, data);
- new_client->addr = address;
- new_client->adapter = adapter;
- new_client->driver = &lm75_driver;
- new_client->flags = 0;
-
- /* Now, we do the remaining detection. There is no identification-
- dedicated register so we have to rely on several tricks:
- unused bits, registers cycling over 8-address boundaries,
- addresses 0x04-0x07 returning the last read value.
- The cycling+unused addresses combination is not tested,
- since it would significantly slow the detection down and would
- hardly add any value. */
- if (kind < 0) {
- int cur, conf, hyst, os;
-
- /* Unused addresses */
- cur = i2c_smbus_read_word_data(new_client, 0);
- conf = i2c_smbus_read_byte_data(new_client, 1);
- hyst = i2c_smbus_read_word_data(new_client, 2);
- if (i2c_smbus_read_word_data(new_client, 4) != hyst
- || i2c_smbus_read_word_data(new_client, 5) != hyst
- || i2c_smbus_read_word_data(new_client, 6) != hyst
- || i2c_smbus_read_word_data(new_client, 7) != hyst)
- goto exit_free;
- os = i2c_smbus_read_word_data(new_client, 3);
- if (i2c_smbus_read_word_data(new_client, 4) != os
- || i2c_smbus_read_word_data(new_client, 5) != os
- || i2c_smbus_read_word_data(new_client, 6) != os
- || i2c_smbus_read_word_data(new_client, 7) != os)
- goto exit_free;
-
- /* Unused bits */
- if (conf & 0xe0)
- goto exit_free;
-
- /* Addresses cycling */
- for (i = 8; i < 0xff; i += 8)
- if (i2c_smbus_read_byte_data(new_client, i + 1) != conf
- || i2c_smbus_read_word_data(new_client, i + 2) != hyst
- || i2c_smbus_read_word_data(new_client, i + 3) != os)
- goto exit_free;
- }
-
- /* Determine the chip type - only one kind supported! */
- if (kind <= 0)
- kind = lm75;
-
- if (kind == lm75) {
- name = "lm75";
- }
-
- /* Fill in the remaining client fields and put it into the global list */
- strlcpy(new_client->name, name, I2C_NAME_SIZE);
- 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 exit_free;
-
- /* Initialize the LM75 chip */
- lm75_init_client(new_client);
-
- /* Register sysfs hooks */
- device_create_file(&new_client->dev, &dev_attr_temp1_max);
- device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst);
- device_create_file(&new_client->dev, &dev_attr_temp1_input);
-
- return 0;
-
-exit_free:
- kfree(data);
-exit:
- return err;
-}
-
-static int lm75_detach_client(struct i2c_client *client)
-{
- i2c_detach_client(client);
- kfree(i2c_get_clientdata(client));
- return 0;
-}
-
-/* All registers are word-sized, except for the configuration register.
- LM75 uses a high-byte first convention, which is exactly opposite to
- the usual practice. */
-static int lm75_read_value(struct i2c_client *client, u8 reg)
-{
- if (reg == LM75_REG_CONF)
- return i2c_smbus_read_byte_data(client, reg);
- else
- return swab16(i2c_smbus_read_word_data(client, reg));
-}
-
-/* All registers are word-sized, except for the configuration register.
- LM75 uses a high-byte first convention, which is exactly opposite to
- the usual practice. */
-static int lm75_write_value(struct i2c_client *client, u8 reg, u16 value)
-{
- if (reg == LM75_REG_CONF)
- return i2c_smbus_write_byte_data(client, reg, value);
- else
- return i2c_smbus_write_word_data(client, reg, swab16(value));
-}
-
-static void lm75_init_client(struct i2c_client *client)
-{
- /* Initialize the LM75 chip */
- lm75_write_value(client, LM75_REG_CONF, 0);
-}
-
-static struct lm75_data *lm75_update_device(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct lm75_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 lm75 update\n");
-
- data->temp_input = lm75_read_value(client, LM75_REG_TEMP);
- data->temp_max = lm75_read_value(client, LM75_REG_TEMP_OS);
- data->temp_hyst = lm75_read_value(client, LM75_REG_TEMP_HYST);
- data->last_updated = jiffies;
- data->valid = 1;
- }
-
- up(&data->update_lock);
-
- return data;
-}
-
-static int __init sensors_lm75_init(void)
-{
- return i2c_add_driver(&lm75_driver);
-}
-
-static void __exit sensors_lm75_exit(void)
-{
- i2c_del_driver(&lm75_driver);
-}
-
-MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>");
-MODULE_DESCRIPTION("LM75 driver");
-MODULE_LICENSE("GPL");
-
-module_init(sensors_lm75_init);
-module_exit(sensors_lm75_exit);