Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* ------------------------------------------------------------------------- */
-/* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and
+/* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and
Frodo Looijaard <frodol@dds.nl> */
#ifndef _LINUX_I2C_H
#define _LINUX_I2C_H
-#include <linux/module.h>
#include <linux/types.h>
+#ifdef __KERNEL__
+#include <linux/module.h>
#include <linux/i2c-id.h>
#include <linux/mod_devicetable.h>
#include <linux/device.h> /* for struct device */
-#include <asm/semaphore.h>
+#include <linux/sched.h> /* for completion */
+#include <linux/mutex.h>
/* --- For i2c-isa ---------------------------------------------------- */
*/
extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num);
-/*
- * Some adapter types (i.e. PCF 8584 based ones) may support slave behaviuor.
- * This is not tested/implemented yet and will change in the future.
- */
-extern int i2c_slave_send(struct i2c_client *,char*,int);
-extern int i2c_slave_recv(struct i2c_client *,char*,int);
-
-
/* This is the very generalized SMBus access routine. You probably do not
want to use this, though; one of the functions below may be much easier,
u8 command, u16 value);
extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
u8 command, u8 length,
- u8 *values);
+ const u8 *values);
/* Returns the number of read bytes */
extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,
u8 command, u8 *values);
+extern s32 i2c_smbus_write_i2c_block_data(struct i2c_client * client,
+ u8 command, u8 length,
+ const u8 *values);
/*
* A driver is capable of handling one or more physical devices present on
* I2C adapters. This information is used to inform the driver of adapter
* events.
+ *
+ * The driver.owner field should be set to the module owner of this driver.
+ * The driver.name field should be set to the name of this driver.
*/
struct i2c_driver {
- struct module *owner;
- char name[32];
int id;
unsigned int class;
- unsigned int flags; /* div., see below */
/* Notifies the driver that a new bus has appeared. This routine
* can be used by the driver to test if the bus meets its conditions
to NULL. If an adapter algorithm can do SMBus access, set
smbus_xfer. If set to NULL, the SMBus protocol is simulated
using common I2C messages */
+ /* master_xfer should return the number of messages successfully
+ processed, or a negative value on error */
int (*master_xfer)(struct i2c_adapter *adap,struct i2c_msg *msgs,
int num);
int (*smbus_xfer) (struct i2c_adapter *adap, u16 addr,
unsigned short flags, char read_write,
u8 command, int size, union i2c_smbus_data * data);
- /* --- these optional/future use for some adapter types.*/
- int (*slave_send)(struct i2c_adapter *,char*,int);
- int (*slave_recv)(struct i2c_adapter *,char*,int);
-
/* --- ioctl like call to set div. parameters. */
int (*algo_control)(struct i2c_adapter *, unsigned int, unsigned long);
struct module *owner;
unsigned int id;
unsigned int class;
- struct i2c_algorithm *algo;/* the algorithm to access the bus */
+ const struct i2c_algorithm *algo; /* the algorithm to access the bus */
void *algo_data;
/* --- administration stuff. */
int (*client_unregister)(struct i2c_client *);
/* data fields that are valid for all devices */
- struct semaphore bus_lock;
- struct semaphore clist_lock;
+ struct mutex bus_lock;
+ struct mutex clist_lock;
int timeout;
int retries;
dev_set_drvdata (&dev->dev, data);
}
-/*flags for the driver struct: */
-#define I2C_DF_NOTIFY 0x01 /* notify on bus (de/a)ttaches */
-#if 0
-/* this flag is gone -- there is a (optional) driver->detach_adapter
- * callback now which can be used instead */
-# define I2C_DF_DUMMY 0x02
-#endif
-
/*flags for the client struct: */
-#define I2C_CLIENT_ALLOW_USE 0x01 /* Client allows access */
-#define I2C_CLIENT_ALLOW_MULTIPLE_USE 0x02 /* Allow multiple access-locks */
- /* on an i2c_client */
#define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */
#define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */
/* Must equal I2C_M_TEN below */
extern int i2c_add_adapter(struct i2c_adapter *);
extern int i2c_del_adapter(struct i2c_adapter *);
-extern int i2c_add_driver(struct i2c_driver *);
+extern int i2c_register_driver(struct module *, struct i2c_driver *);
extern int i2c_del_driver(struct i2c_driver *);
+static inline int i2c_add_driver(struct i2c_driver *driver)
+{
+ return i2c_register_driver(THIS_MODULE, driver);
+}
+
extern int i2c_attach_client(struct i2c_client *);
extern int i2c_detach_client(struct i2c_client *);
-/* New function: This is to get an i2c_client-struct for controlling the
- client either by using i2c_control-function or having the
- client-module export functions that can be used with the i2c_client
- -struct. */
-extern struct i2c_client *i2c_get_client(int driver_id, int adapter_id,
- struct i2c_client *prev);
-
-/* Should be used with new function
- extern struct i2c_client *i2c_get_client(int,int,struct i2c_client *);
- to make sure that client-struct is valid and that it is okay to access
- the i2c-client.
- returns -EACCES if client doesn't allow use (default)
- returns -EBUSY if client doesn't allow multiple use (default) and
- usage_count >0 */
+/* Should be used to make sure that client-struct is valid and that it
+ is okay to access the i2c-client.
+ returns -ENODEV if client has gone in the meantime */
extern int i2c_use_client(struct i2c_client *);
extern int i2c_release_client(struct i2c_client *);
{
return adap->nr;
}
+#endif /* __KERNEL__ */
/*
* I2C Message - used for pure i2c transaction, also from /dev interface
#define I2C_SMBUS 0x0720 /* SMBus-level access */
/* ----- I2C-DEV: char device interface stuff ------------------------- */
+#ifdef __KERNEL__
#define I2C_MAJOR 89 /* Device major number */
force_##chip6, force_##chip7, \
force_##chip8, NULL }; \
I2C_CLIENT_INSMOD_COMMON
-
+#endif /* __KERNEL__ */
#endif /* _LINUX_I2C_H */