#include <linux/idr.h>
#include <linux/seq_file.h>
#include <linux/platform_device.h>
+#include <linux/mutex.h>
#include <asm/uaccess.h>
static LIST_HEAD(adapters);
static LIST_HEAD(drivers);
-static DECLARE_MUTEX(core_lists);
+static DEFINE_MUTEX(core_lists);
static DEFINE_IDR(i2c_adapter_idr);
/* match always succeeds, as we want the probe() to tell if we really accept this match */
return rc;
}
-struct bus_type i2c_bus_type = {
- .name = "i2c",
- .match = i2c_device_match,
- .suspend = i2c_bus_suspend,
- .resume = i2c_bus_resume,
-};
-
static int i2c_device_probe(struct device *dev)
{
return -ENODEV;
return 0;
}
+struct bus_type i2c_bus_type = {
+ .name = "i2c",
+ .match = i2c_device_match,
+ .probe = i2c_device_probe,
+ .remove = i2c_device_remove,
+ .suspend = i2c_bus_suspend,
+ .resume = i2c_bus_resume,
+};
+
void i2c_adapter_dev_release(struct device *dev)
{
struct i2c_adapter *adap = dev_to_i2c_adapter(dev);
.owner = THIS_MODULE,
.name = "i2c_adapter",
.bus = &i2c_bus_type,
- .probe = i2c_device_probe,
- .remove = i2c_device_remove,
};
static void i2c_adapter_class_dev_release(struct class_device *dev)
struct list_head *item;
struct i2c_driver *driver;
- down(&core_lists);
+ mutex_lock(&core_lists);
if (idr_pre_get(&i2c_adapter_idr, GFP_KERNEL) == 0) {
res = -ENOMEM;
/* inform drivers of new adapters */
list_for_each(item,&drivers) {
driver = list_entry(item, struct i2c_driver, list);
- if (driver->flags & I2C_DF_NOTIFY)
+ if (driver->attach_adapter)
/* We ignore the return code; if it fails, too bad */
driver->attach_adapter(adap);
}
out_unlock:
- up(&core_lists);
+ mutex_unlock(&core_lists);
return res;
}
struct i2c_client *client;
int res = 0;
- down(&core_lists);
+ mutex_lock(&core_lists);
/* First make sure that this adapter was ever added */
list_for_each_entry(adap_from_list, &adapters, list) {
if (driver->detach_adapter)
if ((res = driver->detach_adapter(adap))) {
dev_err(&adap->dev, "detach_adapter failed "
- "for driver [%s]\n", driver->name);
+ "for driver [%s]\n",
+ driver->driver.name);
goto out_unlock;
}
}
list_for_each_safe(item, _n, &adap->clients) {
client = list_entry(item, struct i2c_client, list);
- /* detaching devices is unconditional of the set notify
- * flag, as _all_ clients that reside on the adapter
- * must be deleted, as this would cause invalid states.
- */
if ((res=client->driver->detach_client(client))) {
dev_err(&adap->dev, "detach_client failed for client "
"[%s] at address 0x%02x\n", client->name,
dev_dbg(&adap->dev, "adapter [%s] unregistered\n", adap->name);
out_unlock:
- up(&core_lists);
+ mutex_unlock(&core_lists);
return res;
}
* chips.
*/
-int i2c_add_driver(struct i2c_driver *driver)
+int i2c_register_driver(struct module *owner, struct i2c_driver *driver)
{
struct list_head *item;
struct i2c_adapter *adapter;
int res = 0;
- down(&core_lists);
+ mutex_lock(&core_lists);
/* add the driver to the list of i2c drivers in the driver core */
- driver->driver.owner = driver->owner;
- driver->driver.name = driver->name;
+ driver->driver.owner = owner;
driver->driver.bus = &i2c_bus_type;
- driver->driver.probe = i2c_device_probe;
- driver->driver.remove = i2c_device_remove;
res = driver_register(&driver->driver);
if (res)
goto out_unlock;
list_add_tail(&driver->list,&drivers);
- pr_debug("i2c-core: driver [%s] registered\n", driver->name);
+ pr_debug("i2c-core: driver [%s] registered\n", driver->driver.name);
/* now look for instances of driver on our adapters */
- if (driver->flags & I2C_DF_NOTIFY) {
+ if (driver->attach_adapter) {
list_for_each(item,&adapters) {
adapter = list_entry(item, struct i2c_adapter, list);
driver->attach_adapter(adapter);
}
out_unlock:
- up(&core_lists);
+ mutex_unlock(&core_lists);
return res;
}
+EXPORT_SYMBOL(i2c_register_driver);
int i2c_del_driver(struct i2c_driver *driver)
{
int res = 0;
- down(&core_lists);
+ mutex_lock(&core_lists);
/* Have a look at each adapter, if clients of this driver are still
* attached. If so, detach them to be able to kill the driver
* afterwards.
- *
- * Removing clients does not depend on the notify flag, else
- * invalid operation might (will!) result, when using stale client
- * pointers.
*/
list_for_each(item1,&adapters) {
adap = list_entry(item1, struct i2c_adapter, list);
if (driver->detach_adapter) {
if ((res = driver->detach_adapter(adap))) {
dev_err(&adap->dev, "detach_adapter failed "
- "for driver [%s]\n", driver->name);
+ "for driver [%s]\n",
+ driver->driver.name);
goto out_unlock;
}
} else {
driver_unregister(&driver->driver);
list_del(&driver->list);
- pr_debug("i2c-core: driver [%s] unregistered\n", driver->name);
+ pr_debug("i2c-core: driver [%s] unregistered\n", driver->driver.name);
out_unlock:
- up(&core_lists);
+ mutex_unlock(&core_lists);
return 0;
}
}
}
- if (client->flags & I2C_CLIENT_ALLOW_USE)
- client->usage_count = 0;
+ client->usage_count = 0;
client->dev.parent = &client->adapter->dev;
client->dev.driver = &client->driver->driver;
struct i2c_adapter *adapter = client->adapter;
int res = 0;
- if ((client->flags & I2C_CLIENT_ALLOW_USE)
- && (client->usage_count > 0)) {
+ if (client->usage_count > 0) {
dev_warn(&client->dev, "Client [%s] still busy, "
"can't detach\n", client->name);
return -EBUSY;
static int i2c_inc_use_client(struct i2c_client *client)
{
- if (!try_module_get(client->driver->owner))
+ if (!try_module_get(client->driver->driver.owner))
return -ENODEV;
if (!try_module_get(client->adapter->owner)) {
- module_put(client->driver->owner);
+ module_put(client->driver->driver.owner);
return -ENODEV;
}
static void i2c_dec_use_client(struct i2c_client *client)
{
- module_put(client->driver->owner);
+ module_put(client->driver->driver.owner);
module_put(client->adapter->owner);
}
if (ret)
return ret;
- if (client->flags & I2C_CLIENT_ALLOW_USE) {
- if (client->flags & I2C_CLIENT_ALLOW_MULTIPLE_USE)
- client->usage_count++;
- else if (client->usage_count > 0)
- goto busy;
- else
- client->usage_count++;
- }
+ client->usage_count++;
return 0;
- busy:
- i2c_dec_use_client(client);
- return -EBUSY;
}
int i2c_release_client(struct i2c_client *client)
{
- if(client->flags & I2C_CLIENT_ALLOW_USE) {
- if(client->usage_count>0)
- client->usage_count--;
- else {
- pr_debug("i2c-core: %s used one too many times\n",
- __FUNCTION__);
- return -EPERM;
- }
+ if (!client->usage_count) {
+ pr_debug("i2c-core: %s used one too many times\n",
+ __FUNCTION__);
+ return -EPERM;
}
+ client->usage_count--;
i2c_dec_use_client(client);
return 0;
down(&adap->clist_lock);
list_for_each(item,&adap->clients) {
client = list_entry(item, struct i2c_client, list);
- if (!try_module_get(client->driver->owner))
+ if (!try_module_get(client->driver->driver.owner))
continue;
if (NULL != client->driver->command) {
up(&adap->clist_lock);
client->driver->command(client,cmd,arg);
down(&adap->clist_lock);
}
- module_put(client->driver->owner);
+ module_put(client->driver->driver.owner);
}
up(&adap->clist_lock);
}
{
struct i2c_adapter *adapter;
- down(&core_lists);
+ mutex_lock(&core_lists);
adapter = (struct i2c_adapter *)idr_find(&i2c_adapter_idr, id);
if (adapter && !try_module_get(adapter->owner))
adapter = NULL;
- up(&core_lists);
+ mutex_unlock(&core_lists);
return adapter;
}
}
}
+s32 i2c_smbus_write_i2c_block_data(struct i2c_client *client, u8 command,
+ u8 length, u8 *values)
+{
+ union i2c_smbus_data data;
+
+ if (length > I2C_SMBUS_BLOCK_MAX)
+ length = I2C_SMBUS_BLOCK_MAX;
+ data.block[0] = length;
+ memcpy(data.block + 1, values, length);
+ return i2c_smbus_xfer(client->adapter, client->addr, client->flags,
+ I2C_SMBUS_WRITE, command,
+ I2C_SMBUS_I2C_BLOCK_DATA, &data);
+}
+
/* Simulate a SMBus command using the i2c protocol
No checking of parameters is done! */
static s32 i2c_smbus_xfer_emulated(struct i2c_adapter * adapter, u16 addr,
EXPORT_SYMBOL(i2c_add_adapter);
EXPORT_SYMBOL(i2c_del_adapter);
-EXPORT_SYMBOL(i2c_add_driver);
EXPORT_SYMBOL(i2c_del_driver);
EXPORT_SYMBOL(i2c_attach_client);
EXPORT_SYMBOL(i2c_detach_client);
EXPORT_SYMBOL(i2c_smbus_write_word_data);
EXPORT_SYMBOL(i2c_smbus_write_block_data);
EXPORT_SYMBOL(i2c_smbus_read_i2c_block_data);
+EXPORT_SYMBOL(i2c_smbus_write_i2c_block_data);
MODULE_AUTHOR("Simon G. Vogl <simon@tk.uni-linz.ac.at>");
MODULE_DESCRIPTION("I2C-Bus main module");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff