Copyright (c) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>,
Philip Edelbrock <phil@netroedge.com>,
and Mark Studebaker <mdsxyz123@yahoo.com>
- Copyright (c) 2007 Jean Delvare <khali@linux-fr.org>
+ Copyright (c) 2007 - 2008 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/platform_device.h>
-#include <linux/ioport.h>
#include <linux/hwmon.h>
#include <linux/hwmon-vid.h>
#include <linux/hwmon-sysfs.h>
#include <linux/sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
+
+#ifdef CONFIG_ISA
+#include <linux/platform_device.h>
+#include <linux/ioport.h>
#include <asm/io.h>
-#include "lm75.h"
+#endif
-/* ISA device, if found */
-static struct platform_device *pdev;
+#include "lm75.h"
/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
0x2e, 0x2f, I2C_CLIENT_END };
-static unsigned short isa_address = 0x290;
-
/* Insmod parameters */
I2C_CLIENT_INSMOD_4(w83781d, w83782d, w83783s, as99127f);
I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
#define TEMP_FROM_REG(val) ((val) * 1000)
#define BEEP_MASK_FROM_REG(val,type) ((type) == as99127f ? \
- (val) ^ 0x7fff : (val))
+ (~(val)) & 0x7fff : (val) & 0xff7fff)
#define BEEP_MASK_TO_REG(val,type) ((type) == as99127f ? \
- (~(val)) & 0x7fff : (val) & 0xffffff)
+ (~(val)) & 0x7fff : (val) & 0xff7fff)
#define DIV_FROM_REG(val) (1 << (val))
return i;
}
-/* There are some complications in a module like this. First off, W83781D chips
- may be both present on the SMBus and the ISA bus, and we have to handle
- those cases separately at some places. Second, there might be several
- W83781D chips available (well, actually, that is probably never done; but
- it is a clean illustration of how to handle a case like that). Finally,
- a specific chip may be attached to *both* ISA and SMBus, and we would
- not like to detect it double. Fortunately, in the case of the W83781D at
- least, a register tells us what SMBus address we are on, so that helps
- a bit - except if there could be more than one SMBus. Groan. No solution
- for this yet. */
-
-/* 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 w83781d_data {
- struct i2c_client client;
+ struct i2c_client *client;
struct device *hwmon_dev;
struct mutex lock;
enum chips type;
+ /* For ISA device only */
+ const char *name;
+ int isa_addr;
+
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
u8 vid; /* Register encoding, combined */
u32 alarms; /* Register encoding, combined */
u32 beep_mask; /* Register encoding, combined */
- u8 beep_enable; /* Boolean */
u8 pwm[4]; /* Register value */
u8 pwm2_enable; /* Boolean */
u16 sens[3]; /* 782D/783S only.
u8 vrm;
};
-static int w83781d_attach_adapter(struct i2c_adapter *adapter);
-static int w83781d_detect(struct i2c_adapter *adapter, int address, int kind);
-static int w83781d_detach_client(struct i2c_client *client);
-
-static int __devinit w83781d_isa_probe(struct platform_device *pdev);
-static int __devexit w83781d_isa_remove(struct platform_device *pdev);
+static struct w83781d_data *w83781d_data_if_isa(void);
+static int w83781d_alias_detect(struct i2c_client *client, u8 chipid);
static int w83781d_read_value(struct w83781d_data *data, u16 reg);
static int w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value);
static struct w83781d_data *w83781d_update_device(struct device *dev);
static void w83781d_init_device(struct device *dev);
-static struct i2c_driver w83781d_driver = {
- .driver = {
- .name = "w83781d",
- },
- .attach_adapter = w83781d_attach_adapter,
- .detach_client = w83781d_detach_client,
-};
-
-static struct platform_driver w83781d_isa_driver = {
- .driver = {
- .owner = THIS_MODULE,
- .name = "w83781d",
- },
- .probe = w83781d_isa_probe,
- .remove = w83781d_isa_remove,
-};
-
-
/* following are the sysfs callback functions */
#define show_in_reg(reg) \
static ssize_t show_##reg (struct device *dev, struct device_attribute *da, \
return sprintf(buf, "%ld\n",
(long)BEEP_MASK_FROM_REG(data->beep_mask, data->type));
}
-static ssize_t show_beep_enable (struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct w83781d_data *data = w83781d_update_device(dev);
- return sprintf(buf, "%ld\n", (long)data->beep_enable);
-}
static ssize_t
store_beep_mask(struct device *dev, struct device_attribute *attr,
val = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
- data->beep_mask = BEEP_MASK_TO_REG(val, data->type);
+ data->beep_mask &= 0x8000; /* preserve beep enable */
+ data->beep_mask |= BEEP_MASK_TO_REG(val, data->type);
w83781d_write_value(data, W83781D_REG_BEEP_INTS1,
data->beep_mask & 0xff);
w83781d_write_value(data, W83781D_REG_BEEP_INTS2,
- ((data->beep_mask >> 8) & 0x7f)
- | data->beep_enable << 7);
+ (data->beep_mask >> 8) & 0xff);
if (data->type != w83781d && data->type != as99127f) {
w83781d_write_value(data, W83781D_REG_BEEP_INTS3,
((data->beep_mask) >> 16) & 0xff);
return count;
}
-static ssize_t
-store_beep_enable(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct w83781d_data *data = dev_get_drvdata(dev);
- u32 val;
-
- val = simple_strtoul(buf, NULL, 10);
- if (val != 0 && val != 1)
- return -EINVAL;
-
- mutex_lock(&data->update_lock);
- data->beep_enable = val;
- val = w83781d_read_value(data, W83781D_REG_BEEP_INTS2) & 0x7f;
- val |= data->beep_enable << 7;
- w83781d_write_value(data, W83781D_REG_BEEP_INTS2, val);
- mutex_unlock(&data->update_lock);
-
- return count;
-}
-
static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
show_beep_mask, store_beep_mask);
-static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
- show_beep_enable, store_beep_enable);
static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
char *buf)
show_beep, store_beep, 5);
static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO,
show_temp3_beep, store_beep, 13);
+static SENSOR_DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
+ show_beep, store_beep, 15);
static ssize_t
show_fan_div(struct device *dev, struct device_attribute *da, char *buf)
static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR,
show_sensor, store_sensor, 2);
-/* 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)
-{
- struct w83781d_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 when:
- * w83781d_driver is inserted (when this module is loaded), for each
- available adapter
- * when a new adapter is inserted (and w83781d_driver is still present) */
-static int
-w83781d_attach_adapter(struct i2c_adapter *adapter)
-{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_probe(adapter, &addr_data, w83781d_detect);
-}
-
/* Assumes that adapter is of I2C, not ISA variety.
* OTHERWISE DON'T CALL THIS
*/
static int
-w83781d_detect_subclients(struct i2c_adapter *adapter, int address, int kind,
- struct i2c_client *new_client)
+w83781d_detect_subclients(struct i2c_client *new_client)
{
int i, val1 = 0, id;
int err;
- const char *client_name = "";
+ int address = new_client->addr;
+ unsigned short sc_addr[2];
+ struct i2c_adapter *adapter = new_client->adapter;
struct w83781d_data *data = i2c_get_clientdata(new_client);
-
- data->lm75[0] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
- if (!(data->lm75[0])) {
- err = -ENOMEM;
- goto ERROR_SC_0;
- }
+ enum chips kind = data->type;
id = i2c_adapter_id(adapter);
w83781d_write_value(data, W83781D_REG_I2C_SUBADDR,
(force_subclients[2] & 0x07) |
((force_subclients[3] & 0x07) << 4));
- data->lm75[0]->addr = force_subclients[2];
+ sc_addr[0] = force_subclients[2];
} else {
val1 = w83781d_read_value(data, W83781D_REG_I2C_SUBADDR);
- data->lm75[0]->addr = 0x48 + (val1 & 0x07);
+ sc_addr[0] = 0x48 + (val1 & 0x07);
}
if (kind != w83783s) {
- data->lm75[1] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
- if (!(data->lm75[1])) {
- err = -ENOMEM;
- goto ERROR_SC_1;
- }
-
if (force_subclients[0] == id &&
force_subclients[1] == address) {
- data->lm75[1]->addr = force_subclients[3];
+ sc_addr[1] = force_subclients[3];
} else {
- data->lm75[1]->addr = 0x48 + ((val1 >> 4) & 0x07);
+ sc_addr[1] = 0x48 + ((val1 >> 4) & 0x07);
}
- if (data->lm75[0]->addr == data->lm75[1]->addr) {
+ if (sc_addr[0] == sc_addr[1]) {
dev_err(&new_client->dev,
"Duplicate addresses 0x%x for subclients.\n",
- data->lm75[0]->addr);
+ sc_addr[0]);
err = -EBUSY;
goto ERROR_SC_2;
}
}
- if (kind == w83781d)
- client_name = "w83781d subclient";
- else if (kind == w83782d)
- client_name = "w83782d subclient";
- else if (kind == w83783s)
- client_name = "w83783s subclient";
- else if (kind == as99127f)
- client_name = "as99127f subclient";
-
for (i = 0; i <= 1; i++) {
- /* store all data in w83781d */
- i2c_set_clientdata(data->lm75[i], NULL);
- data->lm75[i]->adapter = adapter;
- data->lm75[i]->driver = &w83781d_driver;
- data->lm75[i]->flags = 0;
- strlcpy(data->lm75[i]->name, client_name,
- I2C_NAME_SIZE);
- if ((err = i2c_attach_client(data->lm75[i]))) {
+ data->lm75[i] = i2c_new_dummy(adapter, sc_addr[i]);
+ if (!data->lm75[i]) {
dev_err(&new_client->dev, "Subclient %d "
"registration at address 0x%x "
- "failed.\n", i, data->lm75[i]->addr);
+ "failed.\n", i, sc_addr[i]);
+ err = -ENOMEM;
if (i == 1)
goto ERROR_SC_3;
goto ERROR_SC_2;
/* Undo inits in case of errors */
ERROR_SC_3:
- i2c_detach_client(data->lm75[0]);
+ i2c_unregister_device(data->lm75[0]);
ERROR_SC_2:
- kfree(data->lm75[1]);
ERROR_SC_1:
- kfree(data->lm75[0]);
-ERROR_SC_0:
return err;
}
&dev_attr_vrm.attr,
&dev_attr_alarms.attr,
&dev_attr_beep_mask.attr,
- &dev_attr_beep_enable.attr,
+ &sensor_dev_attr_beep_enable.dev_attr.attr,
NULL
};
static const struct attribute_group w83781d_group = {
}
}
- if (is_isa) {
- err = device_create_file(&pdev->dev, &dev_attr_name);
- if (err)
- return err;
- }
-
return 0;
}
+/* Return 0 if detection is successful, -ENODEV otherwise */
static int
-w83781d_detect(struct i2c_adapter *adapter, int address, int kind)
+w83781d_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info)
{
int val1 = 0, val2;
- struct i2c_client *client;
- struct device *dev;
- struct w83781d_data *data;
- int err;
+ struct w83781d_data *isa = w83781d_data_if_isa();
+ struct i2c_adapter *adapter = client->adapter;
+ int address = client->addr;
const char *client_name = "";
enum vendor { winbond, asus } vendid;
- if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
- err = -EINVAL;
- goto ERROR1;
- }
-
- /* 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 w83781d_{read,write}_value. */
-
- if (!(data = kzalloc(sizeof(struct w83781d_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto ERROR1;
- }
-
- client = &data->client;
- i2c_set_clientdata(client, data);
- client->addr = address;
- mutex_init(&data->lock);
- client->adapter = adapter;
- client->driver = &w83781d_driver;
- dev = &client->dev;
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -ENODEV;
- /* Now, we do the remaining detection. */
+ /* We block updates of the ISA device to minimize the risk of
+ concurrent access to the same W83781D chip through different
+ interfaces. */
+ if (isa)
+ mutex_lock(&isa->update_lock);
/* The w8378?d may be stuck in some other bank than bank 0. This may
make reading other information impossible. Specify a force=... or
force_*=... parameter, and the Winbond will be reset to the right
bank. */
if (kind < 0) {
- if (w83781d_read_value(data, W83781D_REG_CONFIG) & 0x80) {
+ if (i2c_smbus_read_byte_data
+ (client, W83781D_REG_CONFIG) & 0x80) {
dev_dbg(&adapter->dev, "Detection of w83781d chip "
"failed at step 3\n");
- err = -ENODEV;
- goto ERROR2;
+ goto err_nodev;
}
- val1 = w83781d_read_value(data, W83781D_REG_BANK);
- val2 = w83781d_read_value(data, W83781D_REG_CHIPMAN);
+ val1 = i2c_smbus_read_byte_data(client, W83781D_REG_BANK);
+ val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
/* Check for Winbond or Asus ID if in bank 0 */
if ((!(val1 & 0x07)) &&
(((!(val1 & 0x80)) && (val2 != 0xa3) && (val2 != 0xc3))
|| ((val1 & 0x80) && (val2 != 0x5c) && (val2 != 0x12)))) {
dev_dbg(&adapter->dev, "Detection of w83781d chip "
"failed at step 4\n");
- err = -ENODEV;
- goto ERROR2;
+ goto err_nodev;
}
/* If Winbond SMBus, check address at 0x48.
Asus doesn't support, except for as99127f rev.2 */
if ((!(val1 & 0x80) && (val2 == 0xa3)) ||
((val1 & 0x80) && (val2 == 0x5c))) {
- if (w83781d_read_value
- (data, W83781D_REG_I2C_ADDR) != address) {
+ if (i2c_smbus_read_byte_data
+ (client, W83781D_REG_I2C_ADDR) != address) {
dev_dbg(&adapter->dev, "Detection of w83781d "
"chip failed at step 5\n");
- err = -ENODEV;
- goto ERROR2;
+ goto err_nodev;
}
}
}
/* We have either had a force parameter, or we have already detected the
Winbond. Put it now into bank 0 and Vendor ID High Byte */
- w83781d_write_value(data, W83781D_REG_BANK,
- (w83781d_read_value(data, W83781D_REG_BANK)
- & 0x78) | 0x80);
+ i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
+ (i2c_smbus_read_byte_data(client, W83781D_REG_BANK)
+ & 0x78) | 0x80);
/* Determine the chip type. */
if (kind <= 0) {
/* get vendor ID */
- val2 = w83781d_read_value(data, W83781D_REG_CHIPMAN);
+ val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
if (val2 == 0x5c)
vendid = winbond;
else if (val2 == 0x12)
else {
dev_dbg(&adapter->dev, "w83781d chip vendor is "
"neither Winbond nor Asus\n");
- err = -ENODEV;
- goto ERROR2;
+ goto err_nodev;
}
- val1 = w83781d_read_value(data, W83781D_REG_WCHIPID);
+ val1 = i2c_smbus_read_byte_data(client, W83781D_REG_WCHIPID);
if ((val1 == 0x10 || val1 == 0x11) && vendid == winbond)
kind = w83781d;
else if (val1 == 0x30 && vendid == winbond)
dev_warn(&adapter->dev, "Ignoring 'force' "
"parameter for unknown chip at "
"address 0x%02x\n", address);
- err = -EINVAL;
- goto ERROR2;
+ goto err_nodev;
+ }
+
+ if ((kind == w83781d || kind == w83782d)
+ && w83781d_alias_detect(client, val1)) {
+ dev_dbg(&adapter->dev, "Device at 0x%02x appears to "
+ "be the same as ISA device\n", address);
+ goto err_nodev;
}
}
+ if (isa)
+ mutex_unlock(&isa->update_lock);
+
if (kind == w83781d) {
client_name = "w83781d";
} else if (kind == w83782d) {
client_name = "as99127f";
}
- /* Fill in the remaining client fields and put into the global list */
- strlcpy(client->name, client_name, I2C_NAME_SIZE);
- data->type = kind;
+ strlcpy(info->type, client_name, I2C_NAME_SIZE);
+
+ return 0;
+
+ err_nodev:
+ if (isa)
+ mutex_unlock(&isa->update_lock);
+ return -ENODEV;
+}
+
+static int
+w83781d_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct w83781d_data *data;
+ int err;
+
+ data = kzalloc(sizeof(struct w83781d_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto ERROR1;
+ }
+
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->lock);
+ mutex_init(&data->update_lock);
- /* Tell the I2C layer a new client has arrived */
- if ((err = i2c_attach_client(client)))
- goto ERROR2;
+ data->type = id->driver_data;
+ data->client = client;
/* attach secondary i2c lm75-like clients */
- if ((err = w83781d_detect_subclients(adapter, address,
- kind, client)))
+ err = w83781d_detect_subclients(client);
+ if (err)
goto ERROR3;
/* Initialize the chip */
w83781d_init_device(dev);
/* Register sysfs hooks */
- err = w83781d_create_files(dev, kind, 0);
+ err = w83781d_create_files(dev, data->type, 0);
if (err)
goto ERROR4;
sysfs_remove_group(&dev->kobj, &w83781d_group);
sysfs_remove_group(&dev->kobj, &w83781d_group_opt);
- if (data->lm75[1]) {
- i2c_detach_client(data->lm75[1]);
- kfree(data->lm75[1]);
- }
- if (data->lm75[0]) {
- i2c_detach_client(data->lm75[0]);
- kfree(data->lm75[0]);
- }
+ if (data->lm75[0])
+ i2c_unregister_device(data->lm75[0]);
+ if (data->lm75[1])
+ i2c_unregister_device(data->lm75[1]);
ERROR3:
- i2c_detach_client(client);
-ERROR2:
+ i2c_set_clientdata(client, NULL);
kfree(data);
ERROR1:
return err;
}
static int
-w83781d_detach_client(struct i2c_client *client)
+w83781d_remove(struct i2c_client *client)
{
struct w83781d_data *data = i2c_get_clientdata(client);
- int err;
-
- /* main client */
- if (data) {
- hwmon_device_unregister(data->hwmon_dev);
- sysfs_remove_group(&client->dev.kobj, &w83781d_group);
- sysfs_remove_group(&client->dev.kobj, &w83781d_group_opt);
- }
-
- if ((err = i2c_detach_client(client)))
- return err;
+ struct device *dev = &client->dev;
- /* main client */
- if (data)
- kfree(data);
-
- /* subclient */
- else
- kfree(client);
-
- return 0;
-}
-
-static int __devinit
-w83781d_isa_probe(struct platform_device *pdev)
-{
- int err, reg;
- struct w83781d_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 + W83781D_ADDR_REG_OFFSET, 2,
- "w83781d")) {
- err = -EBUSY;
- goto exit;
- }
-
- if (!(data = kzalloc(sizeof(struct w83781d_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);
-
- reg = w83781d_read_value(data, W83781D_REG_WCHIPID);
- switch (reg) {
- case 0x30:
- data->type = w83782d;
- name = "w83782d";
- break;
- default:
- data->type = w83781d;
- name = "w83781d";
- }
- strlcpy(data->client.name, name, I2C_NAME_SIZE);
-
- /* Initialize the W83781D chip */
- w83781d_init_device(&pdev->dev);
-
- /* Register sysfs hooks */
- err = w83781d_create_files(&pdev->dev, data->type, 1);
- if (err)
- goto exit_remove_files;
-
- data->hwmon_dev = hwmon_device_register(&pdev->dev);
- if (IS_ERR(data->hwmon_dev)) {
- err = PTR_ERR(data->hwmon_dev);
- goto exit_remove_files;
- }
-
- return 0;
+ hwmon_device_unregister(data->hwmon_dev);
- exit_remove_files:
- sysfs_remove_group(&pdev->dev.kobj, &w83781d_group);
- sysfs_remove_group(&pdev->dev.kobj, &w83781d_group_opt);
- device_remove_file(&pdev->dev, &dev_attr_name);
- kfree(data);
- exit_release_region:
- release_region(res->start + W83781D_ADDR_REG_OFFSET, 2);
- exit:
- return err;
-}
+ sysfs_remove_group(&dev->kobj, &w83781d_group);
+ sysfs_remove_group(&dev->kobj, &w83781d_group_opt);
-static int __devexit
-w83781d_isa_remove(struct platform_device *pdev)
-{
- struct w83781d_data *data = platform_get_drvdata(pdev);
+ if (data->lm75[0])
+ i2c_unregister_device(data->lm75[0]);
+ if (data->lm75[1])
+ i2c_unregister_device(data->lm75[1]);
- hwmon_device_unregister(data->hwmon_dev);
- sysfs_remove_group(&pdev->dev.kobj, &w83781d_group);
- sysfs_remove_group(&pdev->dev.kobj, &w83781d_group_opt);
- device_remove_file(&pdev->dev, &dev_attr_name);
- release_region(data->client.addr + W83781D_ADDR_REG_OFFSET, 2);
+ i2c_set_clientdata(client, NULL);
kfree(data);
return 0;
}
-/* The SMBus locks itself, usually, but nothing may access the Winbond between
- bank switches. ISA access must always be locked explicitly!
- We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks,
- would slow down the W83781D access and should not be necessary.
- There are some ugly typecasts here, but the good news is - they should
- nowhere else be necessary! */
static int
-w83781d_read_value(struct w83781d_data *data, u16 reg)
+w83781d_read_value_i2c(struct w83781d_data *data, u16 reg)
{
- struct i2c_client *client = &data->client;
- int res, word_sized, bank;
+ struct i2c_client *client = data->client;
+ int res, bank;
struct i2c_client *cl;
- mutex_lock(&data->lock);
- if (!client->driver) { /* ISA device */
- word_sized = (((reg & 0xff00) == 0x100)
- || ((reg & 0xff00) == 0x200))
- && (((reg & 0x00ff) == 0x50)
- || ((reg & 0x00ff) == 0x53)
- || ((reg & 0x00ff) == 0x55));
- if (reg & 0xff00) {
- outb_p(W83781D_REG_BANK,
- client->addr + W83781D_ADDR_REG_OFFSET);
- outb_p(reg >> 8,
- client->addr + W83781D_DATA_REG_OFFSET);
- }
- outb_p(reg & 0xff, client->addr + W83781D_ADDR_REG_OFFSET);
- res = inb_p(client->addr + W83781D_DATA_REG_OFFSET);
- if (word_sized) {
- outb_p((reg & 0xff) + 1,
- client->addr + W83781D_ADDR_REG_OFFSET);
- res =
- (res << 8) + inb_p(client->addr +
- W83781D_DATA_REG_OFFSET);
- }
- if (reg & 0xff00) {
- outb_p(W83781D_REG_BANK,
- client->addr + W83781D_ADDR_REG_OFFSET);
- outb_p(0, client->addr + W83781D_DATA_REG_OFFSET);
- }
+ bank = (reg >> 8) & 0x0f;
+ if (bank > 2)
+ /* switch banks */
+ i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
+ bank);
+ if (bank == 0 || bank > 2) {
+ res = i2c_smbus_read_byte_data(client, reg & 0xff);
} else {
- bank = (reg >> 8) & 0x0f;
- if (bank > 2)
- /* switch banks */
- i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
- bank);
- if (bank == 0 || bank > 2) {
- res = i2c_smbus_read_byte_data(client, reg & 0xff);
- } else {
- /* switch to subclient */
- cl = data->lm75[bank - 1];
- /* convert from ISA to LM75 I2C addresses */
- switch (reg & 0xff) {
- case 0x50: /* TEMP */
- res = swab16(i2c_smbus_read_word_data(cl, 0));
- break;
- case 0x52: /* CONFIG */
- res = i2c_smbus_read_byte_data(cl, 1);
- break;
- case 0x53: /* HYST */
- res = swab16(i2c_smbus_read_word_data(cl, 2));
- break;
- case 0x55: /* OVER */
- default:
- res = swab16(i2c_smbus_read_word_data(cl, 3));
- break;
- }
+ /* switch to subclient */
+ cl = data->lm75[bank - 1];
+ /* convert from ISA to LM75 I2C addresses */
+ switch (reg & 0xff) {
+ case 0x50: /* TEMP */
+ res = swab16(i2c_smbus_read_word_data(cl, 0));
+ break;
+ case 0x52: /* CONFIG */
+ res = i2c_smbus_read_byte_data(cl, 1);
+ break;
+ case 0x53: /* HYST */
+ res = swab16(i2c_smbus_read_word_data(cl, 2));
+ break;
+ case 0x55: /* OVER */
+ default:
+ res = swab16(i2c_smbus_read_word_data(cl, 3));
+ break;
}
- if (bank > 2)
- i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
}
- mutex_unlock(&data->lock);
+ if (bank > 2)
+ i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
+
return res;
}
static int
-w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value)
+w83781d_write_value_i2c(struct w83781d_data *data, u16 reg, u16 value)
{
- struct i2c_client *client = &data->client;
- int word_sized, bank;
+ struct i2c_client *client = data->client;
+ int bank;
struct i2c_client *cl;
- mutex_lock(&data->lock);
- if (!client->driver) { /* ISA device */
- word_sized = (((reg & 0xff00) == 0x100)
- || ((reg & 0xff00) == 0x200))
- && (((reg & 0x00ff) == 0x53)
- || ((reg & 0x00ff) == 0x55));
- if (reg & 0xff00) {
- outb_p(W83781D_REG_BANK,
- client->addr + W83781D_ADDR_REG_OFFSET);
- outb_p(reg >> 8,
- client->addr + W83781D_DATA_REG_OFFSET);
- }
- outb_p(reg & 0xff, client->addr + W83781D_ADDR_REG_OFFSET);
- if (word_sized) {
- outb_p(value >> 8,
- client->addr + W83781D_DATA_REG_OFFSET);
- outb_p((reg & 0xff) + 1,
- client->addr + W83781D_ADDR_REG_OFFSET);
- }
- outb_p(value & 0xff, client->addr + W83781D_DATA_REG_OFFSET);
- if (reg & 0xff00) {
- outb_p(W83781D_REG_BANK,
- client->addr + W83781D_ADDR_REG_OFFSET);
- outb_p(0, client->addr + W83781D_DATA_REG_OFFSET);
- }
+ bank = (reg >> 8) & 0x0f;
+ if (bank > 2)
+ /* switch banks */
+ i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
+ bank);
+ if (bank == 0 || bank > 2) {
+ i2c_smbus_write_byte_data(client, reg & 0xff,
+ value & 0xff);
} else {
- bank = (reg >> 8) & 0x0f;
- if (bank > 2)
- /* switch banks */
- i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
- bank);
- if (bank == 0 || bank > 2) {
- i2c_smbus_write_byte_data(client, reg & 0xff,
- value & 0xff);
- } else {
- /* switch to subclient */
- cl = data->lm75[bank - 1];
- /* convert from ISA to LM75 I2C addresses */
- switch (reg & 0xff) {
- case 0x52: /* CONFIG */
- i2c_smbus_write_byte_data(cl, 1, value & 0xff);
- break;
- case 0x53: /* HYST */
- i2c_smbus_write_word_data(cl, 2, swab16(value));
- break;
- case 0x55: /* OVER */
- i2c_smbus_write_word_data(cl, 3, swab16(value));
- break;
- }
+ /* switch to subclient */
+ cl = data->lm75[bank - 1];
+ /* convert from ISA to LM75 I2C addresses */
+ switch (reg & 0xff) {
+ case 0x52: /* CONFIG */
+ i2c_smbus_write_byte_data(cl, 1, value & 0xff);
+ break;
+ case 0x53: /* HYST */
+ i2c_smbus_write_word_data(cl, 2, swab16(value));
+ break;
+ case 0x55: /* OVER */
+ i2c_smbus_write_word_data(cl, 3, swab16(value));
+ break;
}
- if (bank > 2)
- i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
}
- mutex_unlock(&data->lock);
+ if (bank > 2)
+ i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
+
return 0;
}
static struct w83781d_data *w83781d_update_device(struct device *dev)
{
struct w83781d_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = &data->client;
+ struct i2c_client *client = data->client;
int i;
mutex_lock(&data->update_lock);
W83781D_REG_ALARM2) << 8);
}
i = w83781d_read_value(data, W83781D_REG_BEEP_INTS2);
- data->beep_enable = i >> 7;
- data->beep_mask = ((i & 0x7f) << 8) +
+ data->beep_mask = (i << 8) +
w83781d_read_value(data, W83781D_REG_BEEP_INTS1);
if ((data->type != w83781d) && (data->type != as99127f)) {
data->beep_mask |=
return data;
}
+static const struct i2c_device_id w83781d_ids[] = {
+ { "w83781d", w83781d, },
+ { "w83782d", w83782d, },
+ { "w83783s", w83783s, },
+ { "as99127f", as99127f },
+ { /* LIST END */ }
+};
+MODULE_DEVICE_TABLE(i2c, w83781d_ids);
+
+static struct i2c_driver w83781d_driver = {
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = "w83781d",
+ },
+ .probe = w83781d_probe,
+ .remove = w83781d_remove,
+ .id_table = w83781d_ids,
+ .detect = w83781d_detect,
+ .address_data = &addr_data,
+};
+
+/*
+ * ISA related code
+ */
+#ifdef CONFIG_ISA
+
+/* ISA device, if found */
+static struct platform_device *pdev;
+
+static unsigned short isa_address = 0x290;
+
+/* 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)
+{
+ struct w83781d_data *data = dev_get_drvdata(dev);
+ return sprintf(buf, "%s\n", data->name);
+}
+static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
+
+static struct w83781d_data *w83781d_data_if_isa(void)
+{
+ return pdev ? platform_get_drvdata(pdev) : NULL;
+}
+
+/* Returns 1 if the I2C chip appears to be an alias of the ISA chip */
+static int w83781d_alias_detect(struct i2c_client *client, u8 chipid)
+{
+ struct w83781d_data *isa;
+ int i;
+
+ if (!pdev) /* No ISA chip */
+ return 0;
+
+ isa = platform_get_drvdata(pdev);
+
+ if (w83781d_read_value(isa, W83781D_REG_I2C_ADDR) != client->addr)
+ return 0; /* Address doesn't match */
+ if (w83781d_read_value(isa, W83781D_REG_WCHIPID) != chipid)
+ return 0; /* Chip type doesn't match */
+
+ /* We compare all the limit registers, the config register and the
+ * interrupt mask registers */
+ for (i = 0x2b; i <= 0x3d; i++) {
+ if (w83781d_read_value(isa, i) !=
+ i2c_smbus_read_byte_data(client, i))
+ return 0;
+ }
+ if (w83781d_read_value(isa, W83781D_REG_CONFIG) !=
+ i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG))
+ return 0;
+ for (i = 0x43; i <= 0x46; i++) {
+ if (w83781d_read_value(isa, i) !=
+ i2c_smbus_read_byte_data(client, i))
+ return 0;
+ }
+
+ return 1;
+}
+
+static int
+w83781d_read_value_isa(struct w83781d_data *data, u16 reg)
+{
+ int word_sized, res;
+
+ word_sized = (((reg & 0xff00) == 0x100)
+ || ((reg & 0xff00) == 0x200))
+ && (((reg & 0x00ff) == 0x50)
+ || ((reg & 0x00ff) == 0x53)
+ || ((reg & 0x00ff) == 0x55));
+ if (reg & 0xff00) {
+ outb_p(W83781D_REG_BANK,
+ data->isa_addr + W83781D_ADDR_REG_OFFSET);
+ outb_p(reg >> 8,
+ data->isa_addr + W83781D_DATA_REG_OFFSET);
+ }
+ outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET);
+ res = inb_p(data->isa_addr + W83781D_DATA_REG_OFFSET);
+ if (word_sized) {
+ outb_p((reg & 0xff) + 1,
+ data->isa_addr + W83781D_ADDR_REG_OFFSET);
+ res =
+ (res << 8) + inb_p(data->isa_addr +
+ W83781D_DATA_REG_OFFSET);
+ }
+ if (reg & 0xff00) {
+ outb_p(W83781D_REG_BANK,
+ data->isa_addr + W83781D_ADDR_REG_OFFSET);
+ outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET);
+ }
+ return res;
+}
+
+static void
+w83781d_write_value_isa(struct w83781d_data *data, u16 reg, u16 value)
+{
+ int word_sized;
+
+ word_sized = (((reg & 0xff00) == 0x100)
+ || ((reg & 0xff00) == 0x200))
+ && (((reg & 0x00ff) == 0x53)
+ || ((reg & 0x00ff) == 0x55));
+ if (reg & 0xff00) {
+ outb_p(W83781D_REG_BANK,
+ data->isa_addr + W83781D_ADDR_REG_OFFSET);
+ outb_p(reg >> 8,
+ data->isa_addr + W83781D_DATA_REG_OFFSET);
+ }
+ outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET);
+ if (word_sized) {
+ outb_p(value >> 8,
+ data->isa_addr + W83781D_DATA_REG_OFFSET);
+ outb_p((reg & 0xff) + 1,
+ data->isa_addr + W83781D_ADDR_REG_OFFSET);
+ }
+ outb_p(value & 0xff, data->isa_addr + W83781D_DATA_REG_OFFSET);
+ if (reg & 0xff00) {
+ outb_p(W83781D_REG_BANK,
+ data->isa_addr + W83781D_ADDR_REG_OFFSET);
+ outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET);
+ }
+}
+
+/* The SMBus locks itself, usually, but nothing may access the Winbond between
+ bank switches. ISA access must always be locked explicitly!
+ We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks,
+ would slow down the W83781D access and should not be necessary.
+ There are some ugly typecasts here, but the good news is - they should
+ nowhere else be necessary! */
+static int
+w83781d_read_value(struct w83781d_data *data, u16 reg)
+{
+ struct i2c_client *client = data->client;
+ int res;
+
+ mutex_lock(&data->lock);
+ if (client)
+ res = w83781d_read_value_i2c(data, reg);
+ else
+ res = w83781d_read_value_isa(data, reg);
+ mutex_unlock(&data->lock);
+ return res;
+}
+
+static int
+w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value)
+{
+ struct i2c_client *client = data->client;
+
+ mutex_lock(&data->lock);
+ if (client)
+ w83781d_write_value_i2c(data, reg, value);
+ else
+ w83781d_write_value_isa(data, reg, value);
+ mutex_unlock(&data->lock);
+ return 0;
+}
+
+static int __devinit
+w83781d_isa_probe(struct platform_device *pdev)
+{
+ int err, reg;
+ struct w83781d_data *data;
+ struct resource *res;
+
+ /* Reserve the ISA region */
+ res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+ if (!request_region(res->start + W83781D_ADDR_REG_OFFSET, 2,
+ "w83781d")) {
+ err = -EBUSY;
+ goto exit;
+ }
+
+ data = kzalloc(sizeof(struct w83781d_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit_release_region;
+ }
+ mutex_init(&data->lock);
+ data->isa_addr = res->start;
+ platform_set_drvdata(pdev, data);
+
+ reg = w83781d_read_value(data, W83781D_REG_WCHIPID);
+ switch (reg) {
+ case 0x30:
+ data->type = w83782d;
+ data->name = "w83782d";
+ break;
+ default:
+ data->type = w83781d;
+ data->name = "w83781d";
+ }
+
+ /* Initialize the W83781D chip */
+ w83781d_init_device(&pdev->dev);
+
+ /* Register sysfs hooks */
+ err = w83781d_create_files(&pdev->dev, data->type, 1);
+ if (err)
+ goto exit_remove_files;
+
+ err = device_create_file(&pdev->dev, &dev_attr_name);
+ if (err)
+ goto exit_remove_files;
+
+ data->hwmon_dev = hwmon_device_register(&pdev->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ goto exit_remove_files;
+ }
+
+ return 0;
+
+ exit_remove_files:
+ sysfs_remove_group(&pdev->dev.kobj, &w83781d_group);
+ sysfs_remove_group(&pdev->dev.kobj, &w83781d_group_opt);
+ device_remove_file(&pdev->dev, &dev_attr_name);
+ kfree(data);
+ exit_release_region:
+ release_region(res->start + W83781D_ADDR_REG_OFFSET, 2);
+ exit:
+ return err;
+}
+
+static int __devexit
+w83781d_isa_remove(struct platform_device *pdev)
+{
+ struct w83781d_data *data = platform_get_drvdata(pdev);
+
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&pdev->dev.kobj, &w83781d_group);
+ sysfs_remove_group(&pdev->dev.kobj, &w83781d_group_opt);
+ device_remove_file(&pdev->dev, &dev_attr_name);
+ release_region(data->isa_addr + W83781D_ADDR_REG_OFFSET, 2);
+ kfree(data);
+
+ return 0;
+}
+
+static struct platform_driver w83781d_isa_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "w83781d",
+ },
+ .probe = w83781d_isa_probe,
+ .remove = __devexit_p(w83781d_isa_remove),
+};
+
/* return 1 if a supported chip is found, 0 otherwise */
static int __init
w83781d_isa_found(unsigned short address)
}
static int __init
-sensors_w83781d_init(void)
+w83781d_isa_register(void)
{
int res;
- res = i2c_add_driver(&w83781d_driver);
- if (res)
- goto exit;
-
if (w83781d_isa_found(isa_address)) {
res = platform_driver_register(&w83781d_isa_driver);
if (res)
- goto exit_unreg_i2c_driver;
+ goto exit;
/* Sets global pdev as a side effect */
res = w83781d_isa_device_add(isa_address);
return 0;
- exit_unreg_isa_driver:
+exit_unreg_isa_driver:
platform_driver_unregister(&w83781d_isa_driver);
- exit_unreg_i2c_driver:
- i2c_del_driver(&w83781d_driver);
- exit:
+exit:
return res;
}
static void __exit
-sensors_w83781d_exit(void)
+w83781d_isa_unregister(void)
{
if (pdev) {
platform_device_unregister(pdev);
platform_driver_unregister(&w83781d_isa_driver);
}
+}
+#else /* !CONFIG_ISA */
+
+static struct w83781d_data *w83781d_data_if_isa(void)
+{
+ return NULL;
+}
+
+static int
+w83781d_alias_detect(struct i2c_client *client, u8 chipid)
+{
+ return 0;
+}
+
+static int
+w83781d_read_value(struct w83781d_data *data, u16 reg)
+{
+ int res;
+
+ mutex_lock(&data->lock);
+ res = w83781d_read_value_i2c(data, reg);
+ mutex_unlock(&data->lock);
+
+ return res;
+}
+
+static int
+w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value)
+{
+ mutex_lock(&data->lock);
+ w83781d_write_value_i2c(data, reg, value);
+ mutex_unlock(&data->lock);
+
+ return 0;
+}
+
+static int __init
+w83781d_isa_register(void)
+{
+ return 0;
+}
+
+static void __exit
+w83781d_isa_unregister(void)
+{
+}
+#endif /* CONFIG_ISA */
+
+static int __init
+sensors_w83781d_init(void)
+{
+ int res;
+
+ /* We register the ISA device first, so that we can skip the
+ * registration of an I2C interface to the same device. */
+ res = w83781d_isa_register();
+ if (res)
+ goto exit;
+
+ res = i2c_add_driver(&w83781d_driver);
+ if (res)
+ goto exit_unreg_isa;
+
+ return 0;
+
+ exit_unreg_isa:
+ w83781d_isa_unregister();
+ exit:
+ return res;
+}
+
+static void __exit
+sensors_w83781d_exit(void)
+{
+ w83781d_isa_unregister();
i2c_del_driver(&w83781d_driver);
}
git.samba.org / sfrench / cifs-2.6.git / blobdiff