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path: root/drivers/i2c/chips/lm63.c
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Diffstat (limited to 'drivers/i2c/chips/lm63.c')
-rw-r--r--drivers/i2c/chips/lm63.c597
1 files changed, 0 insertions, 597 deletions
diff --git a/drivers/i2c/chips/lm63.c b/drivers/i2c/chips/lm63.c
deleted file mode 100644
index 7c6f9ea5a25..00000000000
--- a/drivers/i2c/chips/lm63.c
+++ /dev/null
@@ -1,597 +0,0 @@
-/*
- * lm63.c - driver for the National Semiconductor LM63 temperature sensor
- * with integrated fan control
- * Copyright (C) 2004-2005 Jean Delvare <khali@linux-fr.org>
- * Based on the lm90 driver.
- *
- * The LM63 is a sensor chip made by National Semiconductor. It measures
- * two temperatures (its own and one external one) and the speed of one
- * fan, those speed it can additionally control. Complete datasheet can be
- * obtained from National's website at:
- * http://www.national.com/pf/LM/LM63.html
- *
- * The LM63 is basically an LM86 with fan speed monitoring and control
- * capabilities added. It misses some of the LM86 features though:
- * - No low limit for local temperature.
- * - No critical limit for local temperature.
- * - Critical limit for remote temperature can be changed only once. We
- * will consider that the critical limit is read-only.
- *
- * The datasheet isn't very clear about what the tachometer reading is.
- * I had a explanation from National Semiconductor though. The two lower
- * bits of the read value have to be masked out. The value is still 16 bit
- * in width.
- *
- * 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-sysfs.h>
-
-/*
- * Addresses to scan
- * Address is fully defined internally and cannot be changed.
- */
-
-static unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END };
-static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
-
-/*
- * Insmod parameters
- */
-
-SENSORS_INSMOD_1(lm63);
-
-/*
- * The LM63 registers
- */
-
-#define LM63_REG_CONFIG1 0x03
-#define LM63_REG_CONFIG2 0xBF
-#define LM63_REG_CONFIG_FAN 0x4A
-
-#define LM63_REG_TACH_COUNT_MSB 0x47
-#define LM63_REG_TACH_COUNT_LSB 0x46
-#define LM63_REG_TACH_LIMIT_MSB 0x49
-#define LM63_REG_TACH_LIMIT_LSB 0x48
-
-#define LM63_REG_PWM_VALUE 0x4C
-#define LM63_REG_PWM_FREQ 0x4D
-
-#define LM63_REG_LOCAL_TEMP 0x00
-#define LM63_REG_LOCAL_HIGH 0x05
-
-#define LM63_REG_REMOTE_TEMP_MSB 0x01
-#define LM63_REG_REMOTE_TEMP_LSB 0x10
-#define LM63_REG_REMOTE_OFFSET_MSB 0x11
-#define LM63_REG_REMOTE_OFFSET_LSB 0x12
-#define LM63_REG_REMOTE_HIGH_MSB 0x07
-#define LM63_REG_REMOTE_HIGH_LSB 0x13
-#define LM63_REG_REMOTE_LOW_MSB 0x08
-#define LM63_REG_REMOTE_LOW_LSB 0x14
-#define LM63_REG_REMOTE_TCRIT 0x19
-#define LM63_REG_REMOTE_TCRIT_HYST 0x21
-
-#define LM63_REG_ALERT_STATUS 0x02
-#define LM63_REG_ALERT_MASK 0x16
-
-#define LM63_REG_MAN_ID 0xFE
-#define LM63_REG_CHIP_ID 0xFF
-
-/*
- * Conversions and various macros
- * For tachometer counts, the LM63 uses 16-bit values.
- * For local temperature and high limit, remote critical limit and hysteresis
- * value, it uses signed 8-bit values with LSB = 1 degree Celsius.
- * For remote temperature, low and high limits, it uses signed 11-bit values
- * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
- */
-
-#define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
- 5400000 / (reg))
-#define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \
- (5400000 / (val)) & 0xFFFC)
-#define TEMP8_FROM_REG(reg) ((reg) * 1000)
-#define TEMP8_TO_REG(val) ((val) <= -128000 ? -128 : \
- (val) >= 127000 ? 127 : \
- (val) < 0 ? ((val) - 500) / 1000 : \
- ((val) + 500) / 1000)
-#define TEMP11_FROM_REG(reg) ((reg) / 32 * 125)
-#define TEMP11_TO_REG(val) ((val) <= -128000 ? 0x8000 : \
- (val) >= 127875 ? 0x7FE0 : \
- (val) < 0 ? ((val) - 62) / 125 * 32 : \
- ((val) + 62) / 125 * 32)
-#define HYST_TO_REG(val) ((val) <= 0 ? 0 : \
- (val) >= 127000 ? 127 : \
- ((val) + 500) / 1000)
-
-/*
- * Functions declaration
- */
-
-static int lm63_attach_adapter(struct i2c_adapter *adapter);
-static int lm63_detach_client(struct i2c_client *client);
-
-static struct lm63_data *lm63_update_device(struct device *dev);
-
-static int lm63_detect(struct i2c_adapter *adapter, int address, int kind);
-static void lm63_init_client(struct i2c_client *client);
-
-/*
- * Driver data (common to all clients)
- */
-
-static struct i2c_driver lm63_driver = {
- .owner = THIS_MODULE,
- .name = "lm63",
- .flags = I2C_DF_NOTIFY,
- .attach_adapter = lm63_attach_adapter,
- .detach_client = lm63_detach_client,
-};
-
-/*
- * Client data (each client gets its own)
- */
-
-struct lm63_data {
- struct i2c_client client;
- struct semaphore update_lock;
- char valid; /* zero until following fields are valid */
- unsigned long last_updated; /* in jiffies */
-
- /* registers values */
- u8 config, config_fan;
- u16 fan[2]; /* 0: input
- 1: low limit */
- u8 pwm1_freq;
- u8 pwm1_value;
- s8 temp8[3]; /* 0: local input
- 1: local high limit
- 2: remote critical limit */
- s16 temp11[3]; /* 0: remote input
- 1: remote low limit
- 2: remote high limit */
- u8 temp2_crit_hyst;
- u8 alarms;
-};
-
-/*
- * Sysfs callback functions and files
- */
-
-static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
- char *buf)
-{
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
- struct lm63_data *data = lm63_update_device(dev);
- return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
-}
-
-static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
- const char *buf, size_t count)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct lm63_data *data = i2c_get_clientdata(client);
- unsigned long val = simple_strtoul(buf, NULL, 10);
-
- down(&data->update_lock);
- data->fan[1] = FAN_TO_REG(val);
- i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
- data->fan[1] & 0xFF);
- i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
- data->fan[1] >> 8);
- up(&data->update_lock);
- return count;
-}
-
-static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy,
- char *buf)
-{
- struct lm63_data *data = lm63_update_device(dev);
- return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ?
- 255 : (data->pwm1_value * 255 + data->pwm1_freq) /
- (2 * data->pwm1_freq));
-}
-
-static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy,
- const char *buf, size_t count)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct lm63_data *data = i2c_get_clientdata(client);
- unsigned long val;
-
- if (!(data->config_fan & 0x20)) /* register is read-only */
- return -EPERM;
-
- val = simple_strtoul(buf, NULL, 10);
- down(&data->update_lock);
- data->pwm1_value = val <= 0 ? 0 :
- val >= 255 ? 2 * data->pwm1_freq :
- (val * data->pwm1_freq * 2 + 127) / 255;
- i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value);
- up(&data->update_lock);
- return count;
-}
-
-static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy,
- char *buf)
-{
- struct lm63_data *data = lm63_update_device(dev);
- return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
-}
-
-static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
- char *buf)
-{
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
- struct lm63_data *data = lm63_update_device(dev);
- return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
-}
-
-static ssize_t set_temp8(struct device *dev, struct device_attribute *dummy,
- const char *buf, size_t count)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct lm63_data *data = i2c_get_clientdata(client);
- long val = simple_strtol(buf, NULL, 10);
-
- down(&data->update_lock);
- data->temp8[1] = TEMP8_TO_REG(val);
- i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]);
- up(&data->update_lock);
- return count;
-}
-
-static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
- char *buf)
-{
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
- struct lm63_data *data = lm63_update_device(dev);
- return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index]));
-}
-
-static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
- const char *buf, size_t count)
-{
- static const u8 reg[4] = {
- LM63_REG_REMOTE_LOW_MSB,
- LM63_REG_REMOTE_LOW_LSB,
- LM63_REG_REMOTE_HIGH_MSB,
- LM63_REG_REMOTE_HIGH_LSB,
- };
-
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
- struct i2c_client *client = to_i2c_client(dev);
- struct lm63_data *data = i2c_get_clientdata(client);
- long val = simple_strtol(buf, NULL, 10);
- int nr = attr->index;
-
- down(&data->update_lock);
- data->temp11[nr] = TEMP11_TO_REG(val);
- i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
- data->temp11[nr] >> 8);
- i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
- data->temp11[nr] & 0xff);
- up(&data->update_lock);
- return count;
-}
-
-/* Hysteresis register holds a relative value, while we want to present
- an absolute to user-space */
-static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
- char *buf)
-{
- struct lm63_data *data = lm63_update_device(dev);
- return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2])
- - TEMP8_FROM_REG(data->temp2_crit_hyst));
-}
-
-/* And now the other way around, user-space provides an absolute
- hysteresis value and we have to store a relative one */
-static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
- const char *buf, size_t count)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct lm63_data *data = i2c_get_clientdata(client);
- long val = simple_strtol(buf, NULL, 10);
- long hyst;
-
- down(&data->update_lock);
- hyst = TEMP8_FROM_REG(data->temp8[2]) - val;
- i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
- HYST_TO_REG(hyst));
- up(&data->update_lock);
- return count;
-}
-
-static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
- char *buf)
-{
- struct lm63_data *data = lm63_update_device(dev);
- return sprintf(buf, "%u\n", data->alarms);
-}
-
-static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
-static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
- set_fan, 1);
-
-static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1);
-static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL);
-
-static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0);
-static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
- set_temp8, 1);
-
-static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
-static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
- set_temp11, 1);
-static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
- set_temp11, 2);
-static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp8, NULL, 2);
-static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
- set_temp2_crit_hyst);
-
-static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
-
-/*
- * Real code
- */
-
-static int lm63_attach_adapter(struct i2c_adapter *adapter)
-{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_detect(adapter, &addr_data, lm63_detect);
-}
-
-/*
- * The following function does more than just detection. If detection
- * succeeds, it also registers the new chip.
- */
-static int lm63_detect(struct i2c_adapter *adapter, int address, int kind)
-{
- struct i2c_client *new_client;
- struct lm63_data *data;
- int err = 0;
-
- if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
- goto exit;
-
- if (!(data = kmalloc(sizeof(struct lm63_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
- }
- memset(data, 0, sizeof(struct lm63_data));
-
- /* The common I2C client data is placed right before the
- LM63-specific data. */
- new_client = &data->client;
- i2c_set_clientdata(new_client, data);
- new_client->addr = address;
- new_client->adapter = adapter;
- new_client->driver = &lm63_driver;
- new_client->flags = 0;
-
- /* Default to an LM63 if forced */
- if (kind == 0)
- kind = lm63;
-
- if (kind < 0) { /* must identify */
- u8 man_id, chip_id, reg_config1, reg_config2;
- u8 reg_alert_status, reg_alert_mask;
-
- man_id = i2c_smbus_read_byte_data(new_client,
- LM63_REG_MAN_ID);
- chip_id = i2c_smbus_read_byte_data(new_client,
- LM63_REG_CHIP_ID);
- reg_config1 = i2c_smbus_read_byte_data(new_client,
- LM63_REG_CONFIG1);
- reg_config2 = i2c_smbus_read_byte_data(new_client,
- LM63_REG_CONFIG2);
- reg_alert_status = i2c_smbus_read_byte_data(new_client,
- LM63_REG_ALERT_STATUS);
- reg_alert_mask = i2c_smbus_read_byte_data(new_client,
- LM63_REG_ALERT_MASK);
-
- if (man_id == 0x01 /* National Semiconductor */
- && chip_id == 0x41 /* LM63 */
- && (reg_config1 & 0x18) == 0x00
- && (reg_config2 & 0xF8) == 0x00
- && (reg_alert_status & 0x20) == 0x00
- && (reg_alert_mask & 0xA4) == 0xA4) {
- kind = lm63;
- } else { /* failed */
- dev_dbg(&adapter->dev, "Unsupported chip "
- "(man_id=0x%02X, chip_id=0x%02X).\n",
- man_id, chip_id);
- goto exit_free;
- }
- }
-
- strlcpy(new_client->name, "lm63", 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 LM63 chip */
- lm63_init_client(new_client);
-
- /* Register sysfs hooks */
- if (data->config & 0x04) { /* tachometer enabled */
- device_create_file(&new_client->dev,
- &sensor_dev_attr_fan1_input.dev_attr);
- device_create_file(&new_client->dev,
- &sensor_dev_attr_fan1_min.dev_attr);
- }
- device_create_file(&new_client->dev, &dev_attr_pwm1);
- device_create_file(&new_client->dev, &dev_attr_pwm1_enable);
- device_create_file(&new_client->dev,
- &sensor_dev_attr_temp1_input.dev_attr);
- device_create_file(&new_client->dev,
- &sensor_dev_attr_temp2_input.dev_attr);
- device_create_file(&new_client->dev,
- &sensor_dev_attr_temp2_min.dev_attr);
- device_create_file(&new_client->dev,
- &sensor_dev_attr_temp1_max.dev_attr);
- device_create_file(&new_client->dev,
- &sensor_dev_attr_temp2_max.dev_attr);
- device_create_file(&new_client->dev,
- &sensor_dev_attr_temp2_crit.dev_attr);
- device_create_file(&new_client->dev, &dev_attr_temp2_crit_hyst);
- device_create_file(&new_client->dev, &dev_attr_alarms);
-
- return 0;
-
-exit_free:
- kfree(data);
-exit:
- return err;
-}
-
-/* Idealy we shouldn't have to initialize anything, since the BIOS
- should have taken care of everything */
-static void lm63_init_client(struct i2c_client *client)
-{
- struct lm63_data *data = i2c_get_clientdata(client);
-
- data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
- data->config_fan = i2c_smbus_read_byte_data(client,
- LM63_REG_CONFIG_FAN);
-
- /* Start converting if needed */
- if (data->config & 0x40) { /* standby */
- dev_dbg(&client->dev, "Switching to operational mode");
- data->config &= 0xA7;
- i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
- data->config);
- }
-
- /* We may need pwm1_freq before ever updating the client data */
- data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
- if (data->pwm1_freq == 0)
- data->pwm1_freq = 1;
-
- /* Show some debug info about the LM63 configuration */
- dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
- (data->config & 0x04) ? "tachometer input" :
- "alert output");
- dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",
- (data->config_fan & 0x08) ? "1.4" : "360",
- ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
- dev_dbg(&client->dev, "PWM output active %s, %s mode\n",
- (data->config_fan & 0x10) ? "low" : "high",
- (data->config_fan & 0x20) ? "manual" : "auto");
-}
-
-static int lm63_detach_client(struct i2c_client *client)
-{
- int err;
-
- if ((err = i2c_detach_client(client))) {
- dev_err(&client->dev, "Client deregistration failed, "
- "client not detached\n");
- return err;
- }
-
- kfree(i2c_get_clientdata(client));
- return 0;
-}
-
-static struct lm63_data *lm63_update_device(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct lm63_data *data = i2c_get_clientdata(client);
-
- down(&data->update_lock);
-
- if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
- if (data->config & 0x04) { /* tachometer enabled */
- /* order matters for fan1_input */
- data->fan[0] = i2c_smbus_read_byte_data(client,
- LM63_REG_TACH_COUNT_LSB) & 0xFC;
- data->fan[0] |= i2c_smbus_read_byte_data(client,
- LM63_REG_TACH_COUNT_MSB) << 8;
- data->fan[1] = (i2c_smbus_read_byte_data(client,
- LM63_REG_TACH_LIMIT_LSB) & 0xFC)
- | (i2c_smbus_read_byte_data(client,
- LM63_REG_TACH_LIMIT_MSB) << 8);
- }
-
- data->pwm1_freq = i2c_smbus_read_byte_data(client,
- LM63_REG_PWM_FREQ);
- if (data->pwm1_freq == 0)
- data->pwm1_freq = 1;
- data->pwm1_value = i2c_smbus_read_byte_data(client,
- LM63_REG_PWM_VALUE);
-
- data->temp8[0] = i2c_smbus_read_byte_data(client,
- LM63_REG_LOCAL_TEMP);
- data->temp8[1] = i2c_smbus_read_byte_data(client,
- LM63_REG_LOCAL_HIGH);
-
- /* order matters for temp2_input */
- data->temp11[0] = i2c_smbus_read_byte_data(client,
- LM63_REG_REMOTE_TEMP_MSB) << 8;
- data->temp11[0] |= i2c_smbus_read_byte_data(client,
- LM63_REG_REMOTE_TEMP_LSB);
- data->temp11[1] = (i2c_smbus_read_byte_data(client,
- LM63_REG_REMOTE_LOW_MSB) << 8)
- | i2c_smbus_read_byte_data(client,
- LM63_REG_REMOTE_LOW_LSB);
- data->temp11[2] = (i2c_smbus_read_byte_data(client,
- LM63_REG_REMOTE_HIGH_MSB) << 8)
- | i2c_smbus_read_byte_data(client,
- LM63_REG_REMOTE_HIGH_LSB);
- data->temp8[2] = i2c_smbus_read_byte_data(client,
- LM63_REG_REMOTE_TCRIT);
- data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
- LM63_REG_REMOTE_TCRIT_HYST);
-
- data->alarms = i2c_smbus_read_byte_data(client,
- LM63_REG_ALERT_STATUS) & 0x7F;
-
- data->last_updated = jiffies;
- data->valid = 1;
- }
-
- up(&data->update_lock);
-
- return data;
-}
-
-static int __init sensors_lm63_init(void)
-{
- return i2c_add_driver(&lm63_driver);
-}
-
-static void __exit sensors_lm63_exit(void)
-{
- i2c_del_driver(&lm63_driver);
-}
-
-MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
-MODULE_DESCRIPTION("LM63 driver");
-MODULE_LICENSE("GPL");
-
-module_init(sensors_lm63_init);
-module_exit(sensors_lm63_exit);