* on a bus (or read from them). Apart from two basic transfer functions to
* transmit one message at a time, a more complex version can be used to
* transmit an arbitrary number of messages without interruption.
+ * @count must be be less than 64k since msg.len is u16.
*/
extern int i2c_master_send(struct i2c_client *client, const char *buf,
int count);
* @driver: Device driver model driver
* @id_table: List of I2C devices supported by this driver
* @detect: Callback for device detection
- * @address_data: The I2C addresses to probe, ignore or force (for detect)
+ * @address_list: The I2C addresses to probe (for detect)
* @clients: List of detected clients we created (for i2c-core use only)
*
* The driver.owner field should be set to the module owner of this driver.
int (*suspend)(struct i2c_client *, pm_message_t mesg);
int (*resume)(struct i2c_client *);
+ /* Alert callback, for example for the SMBus alert protocol.
+ * The format and meaning of the data value depends on the protocol.
+ * For the SMBus alert protocol, there is a single bit of data passed
+ * as the alert response's low bit ("event flag").
+ */
+ void (*alert)(struct i2c_client *, unsigned int data);
+
/* a ioctl like command that can be used to perform specific functions
* with the device.
*/
const struct i2c_device_id *id_table;
/* Device detection callback for automatic device creation */
- int (*detect)(struct i2c_client *, int kind, struct i2c_board_info *);
- const struct i2c_client_address_data *address_data;
+ int (*detect)(struct i2c_client *, struct i2c_board_info *);
+ const unsigned short *address_list;
struct list_head clients;
};
#define to_i2c_driver(d) container_of(d, struct i2c_driver, driver)
void *algo_data;
/* data fields that are valid for all devices */
- u8 level; /* nesting level for lockdep */
- struct mutex bus_lock;
+ struct rt_mutex bus_lock;
int timeout; /* in jiffies */
int retries;
dev_set_drvdata(&dev->dev, data);
}
+/**
+ * i2c_lock_adapter - Prevent access to an I2C bus segment
+ * @adapter: Target I2C bus segment
+ */
+static inline void i2c_lock_adapter(struct i2c_adapter *adapter)
+{
+ rt_mutex_lock(&adapter->bus_lock);
+}
+
+/**
+ * i2c_unlock_adapter - Reauthorize access to an I2C bus segment
+ * @adapter: Target I2C bus segment
+ */
+static inline void i2c_unlock_adapter(struct i2c_adapter *adapter)
+{
+ rt_mutex_unlock(&adapter->bus_lock);
+}
+
/*flags for the client struct: */
#define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */
#define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */
#define I2C_CLASS_DDC (1<<3) /* DDC bus on graphics adapters */
#define I2C_CLASS_SPD (1<<7) /* SPD EEPROMs and similar */
-/* i2c_client_address_data is the struct for holding default client
- * addresses for a driver and for the parameters supplied on the
- * command line
- */
-struct i2c_client_address_data {
- const unsigned short *normal_i2c;
- const unsigned short *probe;
- const unsigned short *ignore;
- const unsigned short * const *forces;
-};
-
/* Internal numbers to terminate lists */
#define I2C_CLIENT_END 0xfffeU
#define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */
#define I2C_SMBUS_I2C_BLOCK_DATA 8
-
-#ifdef __KERNEL__
-
-/* These defines are used for probing i2c client addresses */
-/* The length of the option lists */
-#define I2C_CLIENT_MAX_OPTS 48
-
-/* Default fill of many variables */
-#define I2C_CLIENT_DEFAULTS {I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
- I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
- I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
- I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
- I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
- I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
- I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
- I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
- I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
- I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
- I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
- I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
- I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
- I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
- I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
- I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END}
-
-/* I2C_CLIENT_MODULE_PARM creates a module parameter, and puts it in the
- module header */
-
-#define I2C_CLIENT_MODULE_PARM(var,desc) \
- static unsigned short var[I2C_CLIENT_MAX_OPTS] = I2C_CLIENT_DEFAULTS; \
- static unsigned int var##_num; \
- module_param_array(var, short, &var##_num, 0); \
- MODULE_PARM_DESC(var, desc)
-
-#define I2C_CLIENT_MODULE_PARM_FORCE(name) \
-I2C_CLIENT_MODULE_PARM(force_##name, \
- "List of adapter,address pairs which are " \
- "unquestionably assumed to contain a `" \
- # name "' chip")
-
-
-#define I2C_CLIENT_INSMOD_COMMON \
-I2C_CLIENT_MODULE_PARM(probe, "List of adapter,address pairs to scan " \
- "additionally"); \
-I2C_CLIENT_MODULE_PARM(ignore, "List of adapter,address pairs not to " \
- "scan"); \
-static const struct i2c_client_address_data addr_data = { \
- .normal_i2c = normal_i2c, \
- .probe = probe, \
- .ignore = ignore, \
- .forces = forces, \
-}
-
-#define I2C_CLIENT_FORCE_TEXT \
- "List of adapter,address pairs to boldly assume to be present"
-
-/* These are the ones you want to use in your own drivers. Pick the one
- which matches the number of devices the driver differenciates between. */
-#define I2C_CLIENT_INSMOD \
-I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
-static const unsigned short * const forces[] = { force, NULL }; \
-I2C_CLIENT_INSMOD_COMMON
-
-#define I2C_CLIENT_INSMOD_1(chip1) \
-enum chips { any_chip, chip1 }; \
-I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
-static const unsigned short * const forces[] = { force, \
- force_##chip1, NULL }; \
-I2C_CLIENT_INSMOD_COMMON
-
-#define I2C_CLIENT_INSMOD_2(chip1, chip2) \
-enum chips { any_chip, chip1, chip2 }; \
-I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
-static const unsigned short * const forces[] = { force, \
- force_##chip1, force_##chip2, NULL }; \
-I2C_CLIENT_INSMOD_COMMON
-
-#define I2C_CLIENT_INSMOD_3(chip1, chip2, chip3) \
-enum chips { any_chip, chip1, chip2, chip3 }; \
-I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
-static const unsigned short * const forces[] = { force, \
- force_##chip1, force_##chip2, force_##chip3, NULL }; \
-I2C_CLIENT_INSMOD_COMMON
-
-#define I2C_CLIENT_INSMOD_4(chip1, chip2, chip3, chip4) \
-enum chips { any_chip, chip1, chip2, chip3, chip4 }; \
-I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
-static const unsigned short * const forces[] = { force, \
- force_##chip1, force_##chip2, force_##chip3, \
- force_##chip4, NULL}; \
-I2C_CLIENT_INSMOD_COMMON
-
-#define I2C_CLIENT_INSMOD_5(chip1, chip2, chip3, chip4, chip5) \
-enum chips { any_chip, chip1, chip2, chip3, chip4, chip5 }; \
-I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
-static const unsigned short * const forces[] = { force, \
- force_##chip1, force_##chip2, force_##chip3, \
- force_##chip4, force_##chip5, NULL }; \
-I2C_CLIENT_INSMOD_COMMON
-
-#define I2C_CLIENT_INSMOD_6(chip1, chip2, chip3, chip4, chip5, chip6) \
-enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6 }; \
-I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip6); \
-static const unsigned short * const forces[] = { force, \
- force_##chip1, force_##chip2, force_##chip3, \
- force_##chip4, force_##chip5, force_##chip6, NULL }; \
-I2C_CLIENT_INSMOD_COMMON
-
-#define I2C_CLIENT_INSMOD_7(chip1, chip2, chip3, chip4, chip5, chip6, chip7) \
-enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, \
- chip7 }; \
-I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip6); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip7); \
-static const unsigned short * const forces[] = { force, \
- force_##chip1, force_##chip2, force_##chip3, \
- force_##chip4, force_##chip5, force_##chip6, \
- force_##chip7, NULL }; \
-I2C_CLIENT_INSMOD_COMMON
-
-#define I2C_CLIENT_INSMOD_8(chip1, chip2, chip3, chip4, chip5, chip6, chip7, chip8) \
-enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, \
- chip7, chip8 }; \
-I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip6); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip7); \
-I2C_CLIENT_MODULE_PARM_FORCE(chip8); \
-static const unsigned short * const forces[] = { force, \
- force_##chip1, force_##chip2, force_##chip3, \
- force_##chip4, force_##chip5, force_##chip6, \
- force_##chip7, force_##chip8, NULL }; \
-I2C_CLIENT_INSMOD_COMMON
-#endif /* __KERNEL__ */
#endif /* _LINUX_I2C_H */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff