lm78.c - Part of lm_sensors, Linux kernel modules for hardware
monitoring
Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
+ Copyright (c) 2007 Jean Delvare <khali@linux-fr.org>
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
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
-#include <linux/i2c-isa.h>
+#include <linux/platform_device.h>
+#include <linux/ioport.h>
#include <linux/hwmon.h>
#include <linux/hwmon-vid.h>
+#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <asm/io.h>
+/* ISA device, if found */
+static struct platform_device *pdev;
+
/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x20, 0x21, 0x22, 0x23, 0x24,
0x25, 0x26, 0x27, 0x28, 0x29,
a bit - except if there could be more than one SMBus. Groan. No solution
for this yet. */
-/* This module may seem overly long and complicated. In fact, it is not so
- bad. Quite a lot of bookkeeping is done. A real driver can often cut
- some corners. */
-
-/* For each registered LM78, we need to keep some data in memory. That
- data is pointed to by lm78_list[NR]->data. The structure itself is
- dynamically allocated, at the same time when a new lm78 client is
- allocated. */
+/* For ISA chips, we abuse the i2c_client addr and name fields. We also use
+ the driver field to differentiate between I2C and ISA chips. */
struct lm78_data {
struct i2c_client client;
struct class_device *class_dev;
static int lm78_attach_adapter(struct i2c_adapter *adapter);
-static int lm78_isa_attach_adapter(struct i2c_adapter *adapter);
static int lm78_detect(struct i2c_adapter *adapter, int address, int kind);
static int lm78_detach_client(struct i2c_client *client);
-static int lm78_read_value(struct i2c_client *client, u8 reg);
-static int lm78_write_value(struct i2c_client *client, u8 reg, u8 value);
+static int __devinit lm78_isa_probe(struct platform_device *pdev);
+static int __devexit lm78_isa_remove(struct platform_device *pdev);
+
+static int lm78_read_value(struct lm78_data *data, u8 reg);
+static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value);
static struct lm78_data *lm78_update_device(struct device *dev);
-static void lm78_init_client(struct i2c_client *client);
+static void lm78_init_device(struct lm78_data *data);
static struct i2c_driver lm78_driver = {
.detach_client = lm78_detach_client,
};
-static struct i2c_driver lm78_isa_driver = {
+static struct platform_driver lm78_isa_driver = {
.driver = {
- .name = "lm78-isa",
+ .owner = THIS_MODULE,
+ .name = "lm78",
},
- .attach_adapter = lm78_isa_attach_adapter,
- .detach_client = lm78_detach_client,
+ .probe = lm78_isa_probe,
+ .remove = lm78_isa_remove,
};
/* 7 Voltages */
-static ssize_t show_in(struct device *dev, char *buf, int nr)
+static ssize_t show_in(struct device *dev, struct device_attribute *da,
+ char *buf)
{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct lm78_data *data = lm78_update_device(dev);
- return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
+ return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index]));
}
-static ssize_t show_in_min(struct device *dev, char *buf, int nr)
+static ssize_t show_in_min(struct device *dev, struct device_attribute *da,
+ char *buf)
{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct lm78_data *data = lm78_update_device(dev);
- return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
+ return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index]));
}
-static ssize_t show_in_max(struct device *dev, char *buf, int nr)
+static ssize_t show_in_max(struct device *dev, struct device_attribute *da,
+ char *buf)
{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct lm78_data *data = lm78_update_device(dev);
- return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
+ return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index]));
}
-static ssize_t set_in_min(struct device *dev, const char *buf,
- size_t count, int nr)
+static ssize_t set_in_min(struct device *dev, struct device_attribute *da,
+ const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lm78_data *data = i2c_get_clientdata(client);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ struct lm78_data *data = dev_get_drvdata(dev);
unsigned long val = simple_strtoul(buf, NULL, 10);
+ int nr = attr->index;
mutex_lock(&data->update_lock);
data->in_min[nr] = IN_TO_REG(val);
- lm78_write_value(client, LM78_REG_IN_MIN(nr), data->in_min[nr]);
+ lm78_write_value(data, LM78_REG_IN_MIN(nr), data->in_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
-static ssize_t set_in_max(struct device *dev, const char *buf,
- size_t count, int nr)
+static ssize_t set_in_max(struct device *dev, struct device_attribute *da,
+ const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lm78_data *data = i2c_get_clientdata(client);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ struct lm78_data *data = dev_get_drvdata(dev);
unsigned long val = simple_strtoul(buf, NULL, 10);
+ int nr = attr->index;
mutex_lock(&data->update_lock);
data->in_max[nr] = IN_TO_REG(val);
- lm78_write_value(client, LM78_REG_IN_MAX(nr), data->in_max[nr]);
+ lm78_write_value(data, LM78_REG_IN_MAX(nr), data->in_max[nr]);
mutex_unlock(&data->update_lock);
return count;
}
#define show_in_offset(offset) \
-static ssize_t \
- show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \
-{ \
- return show_in(dev, buf, offset); \
-} \
-static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
- show_in##offset, NULL); \
-static ssize_t \
- show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
-{ \
- return show_in_min(dev, buf, offset); \
-} \
-static ssize_t \
- show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \
-{ \
- return show_in_max(dev, buf, offset); \
-} \
-static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \
- const char *buf, size_t count) \
-{ \
- return set_in_min(dev, buf, count, offset); \
-} \
-static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \
- const char *buf, size_t count) \
-{ \
- return set_in_max(dev, buf, count, offset); \
-} \
-static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
- show_in##offset##_min, set_in##offset##_min); \
-static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
- show_in##offset##_max, set_in##offset##_max);
+static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
+ show_in, NULL, offset); \
+static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
+ show_in_min, set_in_min, offset); \
+static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
+ show_in_max, set_in_max, offset);
show_in_offset(0);
show_in_offset(1);
show_in_offset(6);
/* Temperature */
-static ssize_t show_temp(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t show_temp(struct device *dev, struct device_attribute *da,
+ char *buf)
{
struct lm78_data *data = lm78_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
}
-static ssize_t show_temp_over(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t show_temp_over(struct device *dev, struct device_attribute *da,
+ char *buf)
{
struct lm78_data *data = lm78_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
}
-static ssize_t set_temp_over(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+static ssize_t set_temp_over(struct device *dev, struct device_attribute *da,
+ const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lm78_data *data = i2c_get_clientdata(client);
+ struct lm78_data *data = dev_get_drvdata(dev);
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_over = TEMP_TO_REG(val);
- lm78_write_value(client, LM78_REG_TEMP_OVER, data->temp_over);
+ lm78_write_value(data, LM78_REG_TEMP_OVER, data->temp_over);
mutex_unlock(&data->update_lock);
return count;
}
-static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *da,
+ char *buf)
{
struct lm78_data *data = lm78_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
}
-static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *da,
+ const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lm78_data *data = i2c_get_clientdata(client);
+ struct lm78_data *data = dev_get_drvdata(dev);
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_hyst = TEMP_TO_REG(val);
- lm78_write_value(client, LM78_REG_TEMP_HYST, data->temp_hyst);
+ lm78_write_value(data, LM78_REG_TEMP_HYST, data->temp_hyst);
mutex_unlock(&data->update_lock);
return count;
}
show_temp_hyst, set_temp_hyst);
/* 3 Fans */
-static ssize_t show_fan(struct device *dev, char *buf, int nr)
+static ssize_t show_fan(struct device *dev, struct device_attribute *da,
+ char *buf)
{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct lm78_data *data = lm78_update_device(dev);
+ int nr = attr->index;
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
DIV_FROM_REG(data->fan_div[nr])) );
}
-static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
+static ssize_t show_fan_min(struct device *dev, struct device_attribute *da,
+ char *buf)
{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct lm78_data *data = lm78_update_device(dev);
+ int nr = attr->index;
return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan_min[nr],
DIV_FROM_REG(data->fan_div[nr])) );
}
-static ssize_t set_fan_min(struct device *dev, const char *buf,
- size_t count, int nr)
+static ssize_t set_fan_min(struct device *dev, struct device_attribute *da,
+ const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lm78_data *data = i2c_get_clientdata(client);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ struct lm78_data *data = dev_get_drvdata(dev);
+ int nr = attr->index;
unsigned long val = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
- lm78_write_value(client, LM78_REG_FAN_MIN(nr), data->fan_min[nr]);
+ lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
-static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
+static ssize_t show_fan_div(struct device *dev, struct device_attribute *da,
+ char *buf)
{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct lm78_data *data = lm78_update_device(dev);
- return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]) );
+ return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
}
/* Note: we save and restore the fan minimum here, because its value is
determined in part by the fan divisor. This follows the principle of
least surprise; the user doesn't expect the fan minimum to change just
because the divisor changed. */
-static ssize_t set_fan_div(struct device *dev, const char *buf,
- size_t count, int nr)
+static ssize_t set_fan_div(struct device *dev, struct device_attribute *da,
+ const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lm78_data *data = i2c_get_clientdata(client);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ struct lm78_data *data = dev_get_drvdata(dev);
+ int nr = attr->index;
unsigned long val = simple_strtoul(buf, NULL, 10);
unsigned long min;
u8 reg;
case 4: data->fan_div[nr] = 2; break;
case 8: data->fan_div[nr] = 3; break;
default:
- dev_err(&client->dev, "fan_div value %ld not "
+ dev_err(dev, "fan_div value %ld not "
"supported. Choose one of 1, 2, 4 or 8!\n", val);
mutex_unlock(&data->update_lock);
return -EINVAL;
}
- reg = lm78_read_value(client, LM78_REG_VID_FANDIV);
+ reg = lm78_read_value(data, LM78_REG_VID_FANDIV);
switch (nr) {
case 0:
reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
break;
}
- lm78_write_value(client, LM78_REG_VID_FANDIV, reg);
+ lm78_write_value(data, LM78_REG_VID_FANDIV, reg);
data->fan_min[nr] =
FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
- lm78_write_value(client, LM78_REG_FAN_MIN(nr), data->fan_min[nr]);
+ lm78_write_value(data, LM78_REG_FAN_MIN(nr), data->fan_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
-#define show_fan_offset(offset) \
-static ssize_t show_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
-{ \
- return show_fan(dev, buf, offset - 1); \
-} \
-static ssize_t show_fan_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
-{ \
- return show_fan_min(dev, buf, offset - 1); \
-} \
-static ssize_t show_fan_##offset##_div (struct device *dev, struct device_attribute *attr, char *buf) \
-{ \
- return show_fan_div(dev, buf, offset - 1); \
-} \
-static ssize_t set_fan_##offset##_min (struct device *dev, struct device_attribute *attr, \
- const char *buf, size_t count) \
-{ \
- return set_fan_min(dev, buf, count, offset - 1); \
-} \
-static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, NULL);\
-static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
- show_fan_##offset##_min, set_fan_##offset##_min);
-
-static ssize_t set_fan_1_div(struct device *dev, struct device_attribute *attr, const char *buf,
- size_t count)
-{
- return set_fan_div(dev, buf, count, 0) ;
-}
-
-static ssize_t set_fan_2_div(struct device *dev, struct device_attribute *attr, const char *buf,
- size_t count)
-{
- return set_fan_div(dev, buf, count, 1) ;
-}
+#define show_fan_offset(offset) \
+static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
+ show_fan, NULL, offset - 1); \
+static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
+ show_fan_min, set_fan_min, offset - 1);
show_fan_offset(1);
show_fan_offset(2);
show_fan_offset(3);
/* Fan 3 divisor is locked in H/W */
-static DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
- show_fan_1_div, set_fan_1_div);
-static DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
- show_fan_2_div, set_fan_2_div);
-static DEVICE_ATTR(fan3_div, S_IRUGO, show_fan_3_div, NULL);
+static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
+ show_fan_div, set_fan_div, 0);
+static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
+ show_fan_div, set_fan_div, 1);
+static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO, show_fan_div, NULL, 2);
/* VID */
-static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t show_vid(struct device *dev, struct device_attribute *da,
+ char *buf)
{
struct lm78_data *data = lm78_update_device(dev);
return sprintf(buf, "%d\n", vid_from_reg(data->vid, 82));
static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
/* Alarms */
-static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t show_alarms(struct device *dev, struct device_attribute *da,
+ char *buf)
{
struct lm78_data *data = lm78_update_device(dev);
return sprintf(buf, "%u\n", data->alarms);
return i2c_probe(adapter, &addr_data, lm78_detect);
}
-static int lm78_isa_attach_adapter(struct i2c_adapter *adapter)
+static struct attribute *lm78_attributes[] = {
+ &sensor_dev_attr_in0_input.dev_attr.attr,
+ &sensor_dev_attr_in0_min.dev_attr.attr,
+ &sensor_dev_attr_in0_max.dev_attr.attr,
+ &sensor_dev_attr_in1_input.dev_attr.attr,
+ &sensor_dev_attr_in1_min.dev_attr.attr,
+ &sensor_dev_attr_in1_max.dev_attr.attr,
+ &sensor_dev_attr_in2_input.dev_attr.attr,
+ &sensor_dev_attr_in2_min.dev_attr.attr,
+ &sensor_dev_attr_in2_max.dev_attr.attr,
+ &sensor_dev_attr_in3_input.dev_attr.attr,
+ &sensor_dev_attr_in3_min.dev_attr.attr,
+ &sensor_dev_attr_in3_max.dev_attr.attr,
+ &sensor_dev_attr_in4_input.dev_attr.attr,
+ &sensor_dev_attr_in4_min.dev_attr.attr,
+ &sensor_dev_attr_in4_max.dev_attr.attr,
+ &sensor_dev_attr_in5_input.dev_attr.attr,
+ &sensor_dev_attr_in5_min.dev_attr.attr,
+ &sensor_dev_attr_in5_max.dev_attr.attr,
+ &sensor_dev_attr_in6_input.dev_attr.attr,
+ &sensor_dev_attr_in6_min.dev_attr.attr,
+ &sensor_dev_attr_in6_max.dev_attr.attr,
+ &dev_attr_temp1_input.attr,
+ &dev_attr_temp1_max.attr,
+ &dev_attr_temp1_max_hyst.attr,
+ &sensor_dev_attr_fan1_input.dev_attr.attr,
+ &sensor_dev_attr_fan1_min.dev_attr.attr,
+ &sensor_dev_attr_fan1_div.dev_attr.attr,
+ &sensor_dev_attr_fan2_input.dev_attr.attr,
+ &sensor_dev_attr_fan2_min.dev_attr.attr,
+ &sensor_dev_attr_fan2_div.dev_attr.attr,
+ &sensor_dev_attr_fan3_input.dev_attr.attr,
+ &sensor_dev_attr_fan3_min.dev_attr.attr,
+ &sensor_dev_attr_fan3_div.dev_attr.attr,
+ &dev_attr_alarms.attr,
+ &dev_attr_cpu0_vid.attr,
+
+ NULL
+};
+
+static const struct attribute_group lm78_group = {
+ .attrs = lm78_attributes,
+};
+
+/* I2C devices get this name attribute automatically, but for ISA devices
+ we must create it by ourselves. */
+static ssize_t show_name(struct device *dev, struct device_attribute
+ *devattr, char *buf)
{
- return lm78_detect(adapter, isa_address, -1);
+ struct lm78_data *data = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n", data->client.name);
}
+static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
/* This function is called by i2c_probe */
static int lm78_detect(struct i2c_adapter *adapter, int address, int kind)
struct i2c_client *new_client;
struct lm78_data *data;
const char *client_name = "";
- int is_isa = i2c_is_isa_adapter(adapter);
- if (!is_isa &&
- !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
err = -ENODEV;
- goto ERROR0;
- }
-
- /* Reserve the ISA region */
- if (is_isa)
- if (!request_region(address, LM78_EXTENT,
- lm78_isa_driver.driver.name)) {
- err = -EBUSY;
- goto ERROR0;
- }
-
- /* Probe whether there is anything available on this address. Already
- done for SMBus clients */
- if (kind < 0) {
- if (is_isa) {
-
-#define REALLY_SLOW_IO
- /* We need the timeouts for at least some LM78-like
- chips. But only if we read 'undefined' registers. */
- i = inb_p(address + 1);
- if (inb_p(address + 2) != i) {
- err = -ENODEV;
- goto ERROR1;
- }
- if (inb_p(address + 3) != i) {
- err = -ENODEV;
- goto ERROR1;
- }
- if (inb_p(address + 7) != i) {
- err = -ENODEV;
- goto ERROR1;
- }
-#undef REALLY_SLOW_IO
-
- /* Let's just hope nothing breaks here */
- i = inb_p(address + 5) & 0x7f;
- outb_p(~i & 0x7f, address + 5);
- if ((inb_p(address + 5) & 0x7f) != (~i & 0x7f)) {
- outb_p(i, address + 5);
- err = -ENODEV;
- goto ERROR1;
- }
- }
+ goto ERROR1;
}
/* OK. For now, we presume we have a valid client. We now create the
}
new_client = &data->client;
- if (is_isa)
- mutex_init(&data->lock);
i2c_set_clientdata(new_client, data);
new_client->addr = address;
new_client->adapter = adapter;
- new_client->driver = is_isa ? &lm78_isa_driver : &lm78_driver;
- new_client->flags = 0;
+ new_client->driver = &lm78_driver;
/* Now, we do the remaining detection. */
if (kind < 0) {
- if (lm78_read_value(new_client, LM78_REG_CONFIG) & 0x80) {
+ if (lm78_read_value(data, LM78_REG_CONFIG) & 0x80) {
err = -ENODEV;
goto ERROR2;
}
- if (!is_isa && (lm78_read_value(
- new_client, LM78_REG_I2C_ADDR) != address)) {
+ if (lm78_read_value(data, LM78_REG_I2C_ADDR) !=
+ address) {
err = -ENODEV;
goto ERROR2;
}
/* Determine the chip type. */
if (kind <= 0) {
- i = lm78_read_value(new_client, LM78_REG_CHIPID);
+ i = lm78_read_value(data, LM78_REG_CHIPID);
if (i == 0x00 || i == 0x20 /* LM78 */
|| i == 0x40) /* LM78-J */
kind = lm78;
strlcpy(new_client->name, client_name, I2C_NAME_SIZE);
data->type = kind;
- data->valid = 0;
- mutex_init(&data->update_lock);
-
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(new_client)))
goto ERROR2;
/* Initialize the LM78 chip */
- lm78_init_client(new_client);
-
- /* A few vars need to be filled upon startup */
- for (i = 0; i < 3; i++) {
- data->fan_min[i] = lm78_read_value(new_client,
- LM78_REG_FAN_MIN(i));
- }
+ lm78_init_device(data);
/* Register sysfs hooks */
+ if ((err = sysfs_create_group(&new_client->dev.kobj, &lm78_group)))
+ goto ERROR3;
+
data->class_dev = hwmon_device_register(&new_client->dev);
if (IS_ERR(data->class_dev)) {
err = PTR_ERR(data->class_dev);
- goto ERROR3;
+ goto ERROR4;
}
- device_create_file(&new_client->dev, &dev_attr_in0_input);
- device_create_file(&new_client->dev, &dev_attr_in0_min);
- device_create_file(&new_client->dev, &dev_attr_in0_max);
- device_create_file(&new_client->dev, &dev_attr_in1_input);
- device_create_file(&new_client->dev, &dev_attr_in1_min);
- device_create_file(&new_client->dev, &dev_attr_in1_max);
- device_create_file(&new_client->dev, &dev_attr_in2_input);
- device_create_file(&new_client->dev, &dev_attr_in2_min);
- device_create_file(&new_client->dev, &dev_attr_in2_max);
- device_create_file(&new_client->dev, &dev_attr_in3_input);
- device_create_file(&new_client->dev, &dev_attr_in3_min);
- device_create_file(&new_client->dev, &dev_attr_in3_max);
- device_create_file(&new_client->dev, &dev_attr_in4_input);
- device_create_file(&new_client->dev, &dev_attr_in4_min);
- device_create_file(&new_client->dev, &dev_attr_in4_max);
- device_create_file(&new_client->dev, &dev_attr_in5_input);
- device_create_file(&new_client->dev, &dev_attr_in5_min);
- device_create_file(&new_client->dev, &dev_attr_in5_max);
- device_create_file(&new_client->dev, &dev_attr_in6_input);
- device_create_file(&new_client->dev, &dev_attr_in6_min);
- device_create_file(&new_client->dev, &dev_attr_in6_max);
- device_create_file(&new_client->dev, &dev_attr_temp1_input);
- 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_fan1_input);
- device_create_file(&new_client->dev, &dev_attr_fan1_min);
- device_create_file(&new_client->dev, &dev_attr_fan1_div);
- device_create_file(&new_client->dev, &dev_attr_fan2_input);
- device_create_file(&new_client->dev, &dev_attr_fan2_min);
- device_create_file(&new_client->dev, &dev_attr_fan2_div);
- device_create_file(&new_client->dev, &dev_attr_fan3_input);
- device_create_file(&new_client->dev, &dev_attr_fan3_min);
- device_create_file(&new_client->dev, &dev_attr_fan3_div);
- device_create_file(&new_client->dev, &dev_attr_alarms);
- device_create_file(&new_client->dev, &dev_attr_cpu0_vid);
-
return 0;
+ERROR4:
+ sysfs_remove_group(&new_client->dev.kobj, &lm78_group);
ERROR3:
i2c_detach_client(new_client);
ERROR2:
kfree(data);
ERROR1:
- if (is_isa)
- release_region(address, LM78_EXTENT);
-ERROR0:
return err;
}
int err;
hwmon_device_unregister(data->class_dev);
+ sysfs_remove_group(&client->dev.kobj, &lm78_group);
if ((err = i2c_detach_client(client)))
return err;
- if(i2c_is_isa_client(client))
- release_region(client->addr, LM78_EXTENT);
+ kfree(data);
+
+ return 0;
+}
+
+static int __devinit lm78_isa_probe(struct platform_device *pdev)
+{
+ int err;
+ struct lm78_data *data;
+ struct resource *res;
+ const char *name;
+
+ /* Reserve the ISA region */
+ res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+ if (!request_region(res->start, LM78_EXTENT, "lm78")) {
+ err = -EBUSY;
+ goto exit;
+ }
+
+ if (!(data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL))) {
+ err = -ENOMEM;
+ goto exit_release_region;
+ }
+ mutex_init(&data->lock);
+ data->client.addr = res->start;
+ i2c_set_clientdata(&data->client, data);
+ platform_set_drvdata(pdev, data);
+
+ if (lm78_read_value(data, LM78_REG_CHIPID) & 0x80) {
+ data->type = lm79;
+ name = "lm79";
+ } else {
+ data->type = lm78;
+ name = "lm78";
+ }
+ strlcpy(data->client.name, name, I2C_NAME_SIZE);
+
+ /* Initialize the LM78 chip */
+ lm78_init_device(data);
+
+ /* Register sysfs hooks */
+ if ((err = sysfs_create_group(&pdev->dev.kobj, &lm78_group))
+ || (err = device_create_file(&pdev->dev, &dev_attr_name)))
+ goto exit_remove_files;
+
+ data->class_dev = hwmon_device_register(&pdev->dev);
+ if (IS_ERR(data->class_dev)) {
+ err = PTR_ERR(data->class_dev);
+ goto exit_remove_files;
+ }
+
+ return 0;
+
+ exit_remove_files:
+ sysfs_remove_group(&pdev->dev.kobj, &lm78_group);
+ device_remove_file(&pdev->dev, &dev_attr_name);
+ kfree(data);
+ exit_release_region:
+ release_region(res->start, LM78_EXTENT);
+ exit:
+ return err;
+}
+
+static int __devexit lm78_isa_remove(struct platform_device *pdev)
+{
+ struct lm78_data *data = platform_get_drvdata(pdev);
+ hwmon_device_unregister(data->class_dev);
+ sysfs_remove_group(&pdev->dev.kobj, &lm78_group);
+ device_remove_file(&pdev->dev, &dev_attr_name);
+ release_region(data->client.addr, LM78_EXTENT);
kfree(data);
return 0;
separately.
We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks,
would slow down the LM78 access and should not be necessary. */
-static int lm78_read_value(struct i2c_client *client, u8 reg)
+static int lm78_read_value(struct lm78_data *data, u8 reg)
{
- int res;
- if (i2c_is_isa_client(client)) {
- struct lm78_data *data = i2c_get_clientdata(client);
+ struct i2c_client *client = &data->client;
+
+ if (!client->driver) { /* ISA device */
+ int res;
mutex_lock(&data->lock);
outb_p(reg, client->addr + LM78_ADDR_REG_OFFSET);
res = inb_p(client->addr + LM78_DATA_REG_OFFSET);
would slow down the LM78 access and should not be necessary.
There are some ugly typecasts here, but the good new is - they should
nowhere else be necessary! */
-static int lm78_write_value(struct i2c_client *client, u8 reg, u8 value)
+static int lm78_write_value(struct lm78_data *data, u8 reg, u8 value)
{
- if (i2c_is_isa_client(client)) {
- struct lm78_data *data = i2c_get_clientdata(client);
+ struct i2c_client *client = &data->client;
+
+ if (!client->driver) { /* ISA device */
mutex_lock(&data->lock);
outb_p(reg, client->addr + LM78_ADDR_REG_OFFSET);
outb_p(value, client->addr + LM78_DATA_REG_OFFSET);
return i2c_smbus_write_byte_data(client, reg, value);
}
-static void lm78_init_client(struct i2c_client *client)
+static void lm78_init_device(struct lm78_data *data)
{
- u8 config = lm78_read_value(client, LM78_REG_CONFIG);
+ u8 config;
+ int i;
/* Start monitoring */
- if (!(config & 0x01))
- lm78_write_value(client, LM78_REG_CONFIG,
+ config = lm78_read_value(data, LM78_REG_CONFIG);
+ if ((config & 0x09) != 0x01)
+ lm78_write_value(data, LM78_REG_CONFIG,
(config & 0xf7) | 0x01);
+
+ /* A few vars need to be filled upon startup */
+ for (i = 0; i < 3; i++) {
+ data->fan_min[i] = lm78_read_value(data,
+ LM78_REG_FAN_MIN(i));
+ }
+
+ mutex_init(&data->update_lock);
}
static struct lm78_data *lm78_update_device(struct device *dev)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lm78_data *data = i2c_get_clientdata(client);
+ struct lm78_data *data = dev_get_drvdata(dev);
int i;
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
|| !data->valid) {
- dev_dbg(&client->dev, "Starting lm78 update\n");
+ dev_dbg(dev, "Starting lm78 update\n");
for (i = 0; i <= 6; i++) {
data->in[i] =
- lm78_read_value(client, LM78_REG_IN(i));
+ lm78_read_value(data, LM78_REG_IN(i));
data->in_min[i] =
- lm78_read_value(client, LM78_REG_IN_MIN(i));
+ lm78_read_value(data, LM78_REG_IN_MIN(i));
data->in_max[i] =
- lm78_read_value(client, LM78_REG_IN_MAX(i));
+ lm78_read_value(data, LM78_REG_IN_MAX(i));
}
for (i = 0; i < 3; i++) {
data->fan[i] =
- lm78_read_value(client, LM78_REG_FAN(i));
+ lm78_read_value(data, LM78_REG_FAN(i));
data->fan_min[i] =
- lm78_read_value(client, LM78_REG_FAN_MIN(i));
+ lm78_read_value(data, LM78_REG_FAN_MIN(i));
}
- data->temp = lm78_read_value(client, LM78_REG_TEMP);
+ data->temp = lm78_read_value(data, LM78_REG_TEMP);
data->temp_over =
- lm78_read_value(client, LM78_REG_TEMP_OVER);
+ lm78_read_value(data, LM78_REG_TEMP_OVER);
data->temp_hyst =
- lm78_read_value(client, LM78_REG_TEMP_HYST);
- i = lm78_read_value(client, LM78_REG_VID_FANDIV);
+ lm78_read_value(data, LM78_REG_TEMP_HYST);
+ i = lm78_read_value(data, LM78_REG_VID_FANDIV);
data->vid = i & 0x0f;
if (data->type == lm79)
data->vid |=
- (lm78_read_value(client, LM78_REG_CHIPID) &
+ (lm78_read_value(data, LM78_REG_CHIPID) &
0x01) << 4;
else
data->vid |= 0x10;
data->fan_div[0] = (i >> 4) & 0x03;
data->fan_div[1] = i >> 6;
- data->alarms = lm78_read_value(client, LM78_REG_ALARM1) +
- (lm78_read_value(client, LM78_REG_ALARM2) << 8);
+ data->alarms = lm78_read_value(data, LM78_REG_ALARM1) +
+ (lm78_read_value(data, LM78_REG_ALARM2) << 8);
data->last_updated = jiffies;
data->valid = 1;
return data;
}
+/* return 1 if a supported chip is found, 0 otherwise */
+static int __init lm78_isa_found(unsigned short address)
+{
+ int val, save, found = 0;
+
+ if (!request_region(address, LM78_EXTENT, "lm78"))
+ return 0;
+
+#define REALLY_SLOW_IO
+ /* We need the timeouts for at least some LM78-like
+ chips. But only if we read 'undefined' registers. */
+ val = inb_p(address + 1);
+ if (inb_p(address + 2) != val
+ || inb_p(address + 3) != val
+ || inb_p(address + 7) != val)
+ goto release;
+#undef REALLY_SLOW_IO
+
+ /* We should be able to change the 7 LSB of the address port. The
+ MSB (busy flag) should be clear initially, set after the write. */
+ save = inb_p(address + LM78_ADDR_REG_OFFSET);
+ if (save & 0x80)
+ goto release;
+ val = ~save & 0x7f;
+ outb_p(val, address + LM78_ADDR_REG_OFFSET);
+ if (inb_p(address + LM78_ADDR_REG_OFFSET) != (val | 0x80)) {
+ outb_p(save, address + LM78_ADDR_REG_OFFSET);
+ goto release;
+ }
+
+ /* We found a device, now see if it could be an LM78 */
+ outb_p(LM78_REG_CONFIG, address + LM78_ADDR_REG_OFFSET);
+ val = inb_p(address + LM78_DATA_REG_OFFSET);
+ if (val & 0x80)
+ goto release;
+ outb_p(LM78_REG_I2C_ADDR, address + LM78_ADDR_REG_OFFSET);
+ val = inb_p(address + LM78_DATA_REG_OFFSET);
+ if (val < 0x03 || val > 0x77) /* Not a valid I2C address */
+ goto release;
+
+ /* The busy flag should be clear again */
+ if (inb_p(address + LM78_ADDR_REG_OFFSET) & 0x80)
+ goto release;
+
+ /* Explicitly prevent the misdetection of Winbond chips */
+ outb_p(0x4f, address + LM78_ADDR_REG_OFFSET);
+ val = inb_p(address + LM78_DATA_REG_OFFSET);
+ if (val == 0xa3 || val == 0x5c)
+ goto release;
+
+ /* Explicitly prevent the misdetection of ITE chips */
+ outb_p(0x58, address + LM78_ADDR_REG_OFFSET);
+ val = inb_p(address + LM78_DATA_REG_OFFSET);
+ if (val == 0x90)
+ goto release;
+
+ /* Determine the chip type */
+ outb_p(LM78_REG_CHIPID, address + LM78_ADDR_REG_OFFSET);
+ val = inb_p(address + LM78_DATA_REG_OFFSET);
+ if (val == 0x00 /* LM78 */
+ || val == 0x40 /* LM78-J */
+ || (val & 0xfe) == 0xc0) /* LM79 */
+ found = 1;
+
+ if (found)
+ pr_info("lm78: Found an %s chip at %#x\n",
+ val & 0x80 ? "LM79" : "LM78", (int)address);
+
+ release:
+ release_region(address, LM78_EXTENT);
+ return found;
+}
+
+static int __init lm78_isa_device_add(unsigned short address)
+{
+ struct resource res = {
+ .start = address,
+ .end = address + LM78_EXTENT,
+ .name = "lm78",
+ .flags = IORESOURCE_IO,
+ };
+ int err;
+
+ pdev = platform_device_alloc("lm78", address);
+ if (!pdev) {
+ err = -ENOMEM;
+ printk(KERN_ERR "lm78: Device allocation failed\n");
+ goto exit;
+ }
+
+ err = platform_device_add_resources(pdev, &res, 1);
+ if (err) {
+ printk(KERN_ERR "lm78: Device resource addition failed "
+ "(%d)\n", err);
+ goto exit_device_put;
+ }
+
+ err = platform_device_add(pdev);
+ if (err) {
+ printk(KERN_ERR "lm78: Device addition failed (%d)\n",
+ err);
+ goto exit_device_put;
+ }
+
+ return 0;
+
+ exit_device_put:
+ platform_device_put(pdev);
+ exit:
+ pdev = NULL;
+ return err;
+}
+
static int __init sm_lm78_init(void)
{
int res;
res = i2c_add_driver(&lm78_driver);
if (res)
- return res;
+ goto exit;
- res = i2c_isa_add_driver(&lm78_isa_driver);
- if (res) {
- i2c_del_driver(&lm78_driver);
- return res;
+ if (lm78_isa_found(isa_address)) {
+ res = platform_driver_register(&lm78_isa_driver);
+ if (res)
+ goto exit_unreg_i2c_driver;
+
+ /* Sets global pdev as a side effect */
+ res = lm78_isa_device_add(isa_address);
+ if (res)
+ goto exit_unreg_isa_driver;
}
return 0;
+
+ exit_unreg_isa_driver:
+ platform_driver_unregister(&lm78_isa_driver);
+ exit_unreg_i2c_driver:
+ i2c_del_driver(&lm78_driver);
+ exit:
+ return res;
}
static void __exit sm_lm78_exit(void)
{
- i2c_isa_del_driver(&lm78_isa_driver);
+ if (pdev) {
+ platform_device_unregister(pdev);
+ platform_driver_unregister(&lm78_isa_driver);
+ }
i2c_del_driver(&lm78_driver);
}
projects / linux-drm-fsl-dcu.git / blobdiff