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hwmon/via686a: Convert to a platform driver

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Convert the via686a driver from the nonsensical i2c-isa hack to a
regular platform driver.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Jean Delvare 2007-06-09 10:11:16 -04:00 committed by Mark M. Hoffman
parent 58fe0809cc
commit 2ec342e684
2 changed files with 156 additions and 132 deletions
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3
drivers/hwmon/Kconfig
View File

@ -497,8 +497,7 @@ config SENSORS_SMSC47B397
config SENSORS_VIA686A
tristate "VIA686A"
depends on I2C && PCI
select I2C_ISA
depends on PCI
help
If you say yes here you get support for the integrated sensors in
Via 686A/B South Bridges.

285
drivers/hwmon/via686a.c
View File

@ -34,8 +34,7 @@
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/i2c-isa.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/err.h>
#include <linux/init.h>
@ -51,10 +50,7 @@ module_param(force_addr, ushort, 0);
MODULE_PARM_DESC(force_addr,
"Initialize the base address of the sensors");
/* Device address
Note that we can't determine the ISA address until we have initialized
our module */
static unsigned short address;
static struct platform_device *pdev;
/*
The Via 686a southbridge has a LM78-like chip integrated on the same IC.
@ -295,7 +291,8 @@ static inline long TEMP_FROM_REG10(u16 val)
/* For each registered chip, we need to keep some data in memory.
The structure is dynamically allocated. */
struct via686a_data {
struct i2c_client client;
unsigned short addr;
const char *name;
struct class_device *class_dev;
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
@ -315,22 +312,22 @@ struct via686a_data {
static struct pci_dev *s_bridge; /* pointer to the (only) via686a */
static int via686a_detect(struct i2c_adapter *adapter);
static int via686a_detach_client(struct i2c_client *client);
static int via686a_probe(struct platform_device *pdev);
static int via686a_remove(struct platform_device *pdev);
static inline int via686a_read_value(struct i2c_client *client, u8 reg)
static inline int via686a_read_value(struct via686a_data *data, u8 reg)
{
return (inb_p(client->addr + reg));
return inb_p(data->addr + reg);
}
static inline void via686a_write_value(struct i2c_client *client, u8 reg,
static inline void via686a_write_value(struct via686a_data *data, u8 reg,
u8 value)
{
outb_p(value, client->addr + reg);
outb_p(value, data->addr + reg);
}
static struct via686a_data *via686a_update_device(struct device *dev);
static void via686a_init_client(struct i2c_client *client);
static void via686a_init_device(struct via686a_data *data);
/* following are the sysfs callback functions */
@ -352,26 +349,24 @@ static ssize_t show_in_max(struct device *dev, char *buf, int nr) {
static ssize_t set_in_min(struct device *dev, const char *buf,
size_t count, int nr) {
struct i2c_client *client = to_i2c_client(dev);
struct via686a_data *data = i2c_get_clientdata(client);
struct via686a_data *data = dev_get_drvdata(dev);
unsigned long val = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->in_min[nr] = IN_TO_REG(val, nr);
via686a_write_value(client, VIA686A_REG_IN_MIN(nr),
via686a_write_value(data, VIA686A_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) {
struct i2c_client *client = to_i2c_client(dev);
struct via686a_data *data = i2c_get_clientdata(client);
struct via686a_data *data = dev_get_drvdata(dev);
unsigned long val = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->in_max[nr] = IN_TO_REG(val, nr);
via686a_write_value(client, VIA686A_REG_IN_MAX(nr),
via686a_write_value(data, VIA686A_REG_IN_MAX(nr),
data->in_max[nr]);
mutex_unlock(&data->update_lock);
return count;
@ -429,26 +424,24 @@ static ssize_t show_temp_hyst(struct device *dev, char *buf, int nr) {
}
static ssize_t set_temp_over(struct device *dev, const char *buf,
size_t count, int nr) {
struct i2c_client *client = to_i2c_client(dev);
struct via686a_data *data = i2c_get_clientdata(client);
struct via686a_data *data = dev_get_drvdata(dev);
int val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_over[nr] = TEMP_TO_REG(val);
via686a_write_value(client, VIA686A_REG_TEMP_OVER[nr],
via686a_write_value(data, VIA686A_REG_TEMP_OVER[nr],
data->temp_over[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_temp_hyst(struct device *dev, const char *buf,
size_t count, int nr) {
struct i2c_client *client = to_i2c_client(dev);
struct via686a_data *data = i2c_get_clientdata(client);
struct via686a_data *data = dev_get_drvdata(dev);
int val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_hyst[nr] = TEMP_TO_REG(val);
via686a_write_value(client, VIA686A_REG_TEMP_HYST[nr],
via686a_write_value(data, VIA686A_REG_TEMP_HYST[nr],
data->temp_hyst[nr]);
mutex_unlock(&data->update_lock);
return count;
@ -505,28 +498,26 @@ static ssize_t show_fan_div(struct device *dev, char *buf, int nr) {
}
static ssize_t set_fan_min(struct device *dev, const char *buf,
size_t count, int nr) {
struct i2c_client *client = to_i2c_client(dev);
struct via686a_data *data = i2c_get_clientdata(client);
struct via686a_data *data = dev_get_drvdata(dev);
int val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
via686a_write_value(client, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]);
via686a_write_value(data, VIA686A_REG_FAN_MIN(nr+1), data->fan_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_fan_div(struct device *dev, const char *buf,
size_t count, int nr) {
struct i2c_client *client = to_i2c_client(dev);
struct via686a_data *data = i2c_get_clientdata(client);
struct via686a_data *data = dev_get_drvdata(dev);
int val = simple_strtol(buf, NULL, 10);
int old;
mutex_lock(&data->update_lock);
old = via686a_read_value(client, VIA686A_REG_FANDIV);
old = via686a_read_value(data, VIA686A_REG_FANDIV);
data->fan_div[nr] = DIV_TO_REG(val);
old = (old & 0x0f) | (data->fan_div[1] << 6) | (data->fan_div[0] << 4);
via686a_write_value(client, VIA686A_REG_FANDIV, old);
via686a_write_value(data, VIA686A_REG_FANDIV, old);
mutex_unlock(&data->update_lock);
return count;
}
@ -570,6 +561,14 @@ static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, ch
}
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
static ssize_t show_name(struct device *dev, struct device_attribute
*devattr, char *buf)
{
struct via686a_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%s\n", data->name);
}
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
static struct attribute *via686a_attributes[] = {
&dev_attr_in0_input.attr,
&dev_attr_in1_input.attr,
@ -605,6 +604,7 @@ static struct attribute *via686a_attributes[] = {
&dev_attr_fan2_div.attr,
&dev_attr_alarms.attr,
&dev_attr_name.attr,
NULL
};
@ -612,58 +612,29 @@ static const struct attribute_group via686a_group = {
.attrs = via686a_attributes,
};
/* The driver. I choose to use type i2c_driver, as at is identical to both
smbus_driver and isa_driver, and clients could be of either kind */
static struct i2c_driver via686a_driver = {
static struct platform_driver via686a_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "via686a",
},
.attach_adapter = via686a_detect,
.detach_client = via686a_detach_client,
.probe = via686a_probe,
.remove = __devexit_p(via686a_remove),
};
/* This is called when the module is loaded */
static int via686a_detect(struct i2c_adapter *adapter)
static int __devinit via686a_probe(struct platform_device *pdev)
{
struct i2c_client *new_client;
struct via686a_data *data;
int err = 0;
const char client_name[] = "via686a";
u16 val;
/* 8231 requires multiple of 256, we enforce that on 686 as well */
if (force_addr) {
address = force_addr & 0xFF00;
dev_warn(&adapter->dev, "forcing ISA address 0x%04X\n",
address);
if (PCIBIOS_SUCCESSFUL !=
pci_write_config_word(s_bridge, VIA686A_BASE_REG, address))
return -ENODEV;
}
if (PCIBIOS_SUCCESSFUL !=
pci_read_config_word(s_bridge, VIA686A_ENABLE_REG, &val))
return -ENODEV;
if (!(val & 0x0001)) {
if (force_addr) {
dev_info(&adapter->dev, "enabling sensors\n");
if (PCIBIOS_SUCCESSFUL !=
pci_write_config_word(s_bridge, VIA686A_ENABLE_REG,
val | 0x0001))
return -ENODEV;
} else {
dev_warn(&adapter->dev, "sensors disabled - enable "
"with force_addr=0x%x\n", address);
return -ENODEV;
}
}
struct resource *res;
int err;
/* Reserve the ISA region */
if (!request_region(address, VIA686A_EXTENT,
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (!request_region(res->start, VIA686A_EXTENT,
via686a_driver.driver.name)) {
dev_err(&adapter->dev, "region 0x%x already in use!\n",
address);
dev_err(&pdev->dev, "Region 0x%lx-0x%lx already in use!\n",
(unsigned long)res->start, (unsigned long)res->end);
return -ENODEV;
}
@ -672,30 +643,19 @@ static int via686a_detect(struct i2c_adapter *adapter)
goto exit_release;
}
new_client = &data->client;
i2c_set_clientdata(new_client, data);
new_client->addr = address;
new_client->adapter = adapter;
new_client->driver = &via686a_driver;
new_client->flags = 0;
/* Fill in the remaining client fields and put into the global list */
strlcpy(new_client->name, client_name, I2C_NAME_SIZE);
data->valid = 0;
platform_set_drvdata(pdev, data);
data->addr = res->start;
data->name = "via686a";
mutex_init(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(new_client)))
goto exit_free;
/* Initialize the VIA686A chip */
via686a_init_client(new_client);
via686a_init_device(data);
/* Register sysfs hooks */
if ((err = sysfs_create_group(&new_client->dev.kobj, &via686a_group)))
goto exit_detach;
if ((err = sysfs_create_group(&pdev->dev.kobj, &via686a_group)))
goto exit_free;
data->class_dev = hwmon_device_register(&new_client->dev);
data->class_dev = hwmon_device_register(&pdev->dev);
if (IS_ERR(data->class_dev)) {
err = PTR_ERR(data->class_dev);
goto exit_remove_files;
@ -704,52 +664,46 @@ static int via686a_detect(struct i2c_adapter *adapter)
return 0;
exit_remove_files:
sysfs_remove_group(&new_client->dev.kobj, &via686a_group);
exit_detach:
i2c_detach_client(new_client);
sysfs_remove_group(&pdev->dev.kobj, &via686a_group);
exit_free:
kfree(data);
exit_release:
release_region(address, VIA686A_EXTENT);
release_region(res->start, VIA686A_EXTENT);
return err;
}
static int via686a_detach_client(struct i2c_client *client)
static int __devexit via686a_remove(struct platform_device *pdev)
{
struct via686a_data *data = i2c_get_clientdata(client);
int err;
struct via686a_data *data = platform_get_drvdata(pdev);
hwmon_device_unregister(data->class_dev);
sysfs_remove_group(&client->dev.kobj, &via686a_group);
sysfs_remove_group(&pdev->dev.kobj, &via686a_group);
if ((err = i2c_detach_client(client)))
return err;
release_region(client->addr, VIA686A_EXTENT);
release_region(data->addr, VIA686A_EXTENT);
platform_set_drvdata(pdev, NULL);
kfree(data);
return 0;
}
static void via686a_init_client(struct i2c_client *client)
static void __devinit via686a_init_device(struct via686a_data *data)
{
u8 reg;
/* Start monitoring */
reg = via686a_read_value(client, VIA686A_REG_CONFIG);
via686a_write_value(client, VIA686A_REG_CONFIG, (reg|0x01)&0x7F);
reg = via686a_read_value(data, VIA686A_REG_CONFIG);
via686a_write_value(data, VIA686A_REG_CONFIG, (reg | 0x01) & 0x7F);
/* Configure temp interrupt mode for continuous-interrupt operation */
reg = via686a_read_value(client, VIA686A_REG_TEMP_MODE);
via686a_write_value(client, VIA686A_REG_TEMP_MODE,
reg = via686a_read_value(data, VIA686A_REG_TEMP_MODE);
via686a_write_value(data, VIA686A_REG_TEMP_MODE,
(reg & ~VIA686A_TEMP_MODE_MASK)
| VIA686A_TEMP_MODE_CONTINUOUS);
}
static struct via686a_data *via686a_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct via686a_data *data = i2c_get_clientdata(client);
struct via686a_data *data = dev_get_drvdata(dev);
int i;
mutex_lock(&data->update_lock);
@ -758,27 +712,27 @@ static struct via686a_data *via686a_update_device(struct device *dev)
|| !data->valid) {
for (i = 0; i <= 4; i++) {
data->in[i] =
via686a_read_value(client, VIA686A_REG_IN(i));
data->in_min[i] = via686a_read_value(client,
via686a_read_value(data, VIA686A_REG_IN(i));
data->in_min[i] = via686a_read_value(data,
VIA686A_REG_IN_MIN
(i));
data->in_max[i] =
via686a_read_value(client, VIA686A_REG_IN_MAX(i));
via686a_read_value(data, VIA686A_REG_IN_MAX(i));
}
for (i = 1; i <= 2; i++) {
data->fan[i - 1] =
via686a_read_value(client, VIA686A_REG_FAN(i));
data->fan_min[i - 1] = via686a_read_value(client,
via686a_read_value(data, VIA686A_REG_FAN(i));
data->fan_min[i - 1] = via686a_read_value(data,
VIA686A_REG_FAN_MIN(i));
}
for (i = 0; i <= 2; i++) {
data->temp[i] = via686a_read_value(client,
data->temp[i] = via686a_read_value(data,
VIA686A_REG_TEMP[i]) << 2;
data->temp_over[i] =
via686a_read_value(client,
via686a_read_value(data,
VIA686A_REG_TEMP_OVER[i]);
data->temp_hyst[i] =
via686a_read_value(client,
via686a_read_value(data,
VIA686A_REG_TEMP_HYST[i]);
}
/* add in lower 2 bits
@ -786,23 +740,23 @@ static struct via686a_data *via686a_update_device(struct device *dev)
temp2 uses bits 5-4 of VIA686A_REG_TEMP_LOW23
temp3 uses bits 7-6 of VIA686A_REG_TEMP_LOW23
*/
data->temp[0] |= (via686a_read_value(client,
data->temp[0] |= (via686a_read_value(data,
VIA686A_REG_TEMP_LOW1)
& 0xc0) >> 6;
data->temp[1] |=
(via686a_read_value(client, VIA686A_REG_TEMP_LOW23) &
(via686a_read_value(data, VIA686A_REG_TEMP_LOW23) &
0x30) >> 4;
data->temp[2] |=
(via686a_read_value(client, VIA686A_REG_TEMP_LOW23) &
(via686a_read_value(data, VIA686A_REG_TEMP_LOW23) &
0xc0) >> 6;
i = via686a_read_value(client, VIA686A_REG_FANDIV);
i = via686a_read_value(data, VIA686A_REG_FANDIV);
data->fan_div[0] = (i >> 4) & 0x03;
data->fan_div[1] = i >> 6;
data->alarms =
via686a_read_value(client,
via686a_read_value(data,
VIA686A_REG_ALARM1) |
(via686a_read_value(client, VIA686A_REG_ALARM2) << 8);
(via686a_read_value(data, VIA686A_REG_ALARM2) << 8);
data->last_updated = jiffies;
data->valid = 1;
}
@ -819,32 +773,102 @@ static struct pci_device_id via686a_pci_ids[] = {
MODULE_DEVICE_TABLE(pci, via686a_pci_ids);
static int __devinit via686a_device_add(unsigned short address)
{
struct resource res = {
.start = address,
.end = address + VIA686A_EXTENT - 1,
.name = "via686a",
.flags = IORESOURCE_IO,
};
int err;
pdev = platform_device_alloc("via686a", address);
if (!pdev) {
err = -ENOMEM;
printk(KERN_ERR "via686a: Device allocation failed\n");
goto exit;
}
err = platform_device_add_resources(pdev, &res, 1);
if (err) {
printk(KERN_ERR "via686a: Device resource addition failed "
"(%d)\n", err);
goto exit_device_put;
}
err = platform_device_add(pdev);
if (err) {
printk(KERN_ERR "via686a: Device addition failed (%d)\n",
err);
goto exit_device_put;
}
return 0;
exit_device_put:
platform_device_put(pdev);
exit:
return err;
}
static int __devinit via686a_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
u16 val;
u16 address, val;
if (force_addr) {
address = force_addr & ~(VIA686A_EXTENT - 1);
dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", address);
if (PCIBIOS_SUCCESSFUL !=
pci_write_config_word(dev, VIA686A_BASE_REG, address | 1))
return -ENODEV;
}
if (PCIBIOS_SUCCESSFUL !=
pci_read_config_word(dev, VIA686A_BASE_REG, &val))
return -ENODEV;
address = val & ~(VIA686A_EXTENT - 1);
if (address == 0 && force_addr == 0) {
if (address == 0) {
dev_err(&dev->dev, "base address not set - upgrade BIOS "
"or use force_addr=0xaddr\n");
return -ENODEV;
}
s_bridge = pci_dev_get(dev);
if (i2c_isa_add_driver(&via686a_driver)) {
pci_dev_put(s_bridge);
s_bridge = NULL;
if (PCIBIOS_SUCCESSFUL !=
pci_read_config_word(dev, VIA686A_ENABLE_REG, &val))
return -ENODEV;
if (!(val & 0x0001)) {
if (!force_addr) {
dev_warn(&dev->dev, "Sensors disabled, enable "
"with force_addr=0x%x\n", address);
return -ENODEV;
}
dev_warn(&dev->dev, "Enabling sensors\n");
if (PCIBIOS_SUCCESSFUL !=
pci_write_config_word(dev, VIA686A_ENABLE_REG,
val | 0x0001))
return -ENODEV;
}
if (platform_driver_register(&via686a_driver))
goto exit;
/* Sets global pdev as a side effect */
if (via686a_device_add(address))
goto exit_unregister;
/* Always return failure here. This is to allow other drivers to bind
* to this pci device. We don't really want to have control over the
* pci device, we only wanted to read as few register values from it.
*/
s_bridge = pci_dev_get(dev);
return -ENODEV;
exit_unregister:
platform_driver_unregister(&via686a_driver);
exit:
return -ENODEV;
}
@ -863,7 +887,8 @@ static void __exit sm_via686a_exit(void)
{
pci_unregister_driver(&via686a_pci_driver);
if (s_bridge != NULL) {
i2c_isa_del_driver(&via686a_driver);
platform_device_unregister(pdev);
platform_driver_unregister(&via686a_driver);
pci_dev_put(s_bridge);
s_bridge = NULL;
}