1 /* ------------------------------------------------------------------------- */
3 /* i2c.h - definitions for the i2c-bus interface */
5 /* ------------------------------------------------------------------------- */
6 /* Copyright (C) 1995-2000 Simon G. Vogl
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
21 /* ------------------------------------------------------------------------- */
23 /* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and
24 Frodo Looijaard <frodol@dds.nl> */
29 #include <linux/types.h>
31 #include <linux/module.h>
32 #include <linux/i2c-id.h>
33 #include <linux/mod_devicetable.h>
34 #include <linux/device.h> /* for struct device */
35 #include <linux/sched.h> /* for completion */
36 #include <linux/mutex.h>
38 /* --- General options ------------------------------------------------ */
48 * The master routines are the ones normally used to transmit data to devices
49 * on a bus (or read from them). Apart from two basic transfer functions to
50 * transmit one message at a time, a more complex version can be used to
51 * transmit an arbitrary number of messages without interruption.
53 extern int i2c_master_send(struct i2c_client *,const char* ,int);
54 extern int i2c_master_recv(struct i2c_client *,char* ,int);
56 /* Transfer num messages.
58 extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num);
61 /* This is the very generalized SMBus access routine. You probably do not
62 want to use this, though; one of the functions below may be much easier,
63 and probably just as fast.
64 Note that we use i2c_adapter here, because you do not need a specific
65 smbus adapter to call this function. */
66 extern s32 i2c_smbus_xfer (struct i2c_adapter * adapter, u16 addr,
68 char read_write, u8 command, int size,
69 union i2c_smbus_data * data);
71 /* Now follow the 'nice' access routines. These also document the calling
72 conventions of smbus_access. */
74 extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value);
75 extern s32 i2c_smbus_read_byte(struct i2c_client * client);
76 extern s32 i2c_smbus_write_byte(struct i2c_client * client, u8 value);
77 extern s32 i2c_smbus_read_byte_data(struct i2c_client * client, u8 command);
78 extern s32 i2c_smbus_write_byte_data(struct i2c_client * client,
79 u8 command, u8 value);
80 extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);
81 extern s32 i2c_smbus_write_word_data(struct i2c_client * client,
82 u8 command, u16 value);
83 /* Returns the number of read bytes */
84 extern s32 i2c_smbus_read_block_data(struct i2c_client *client,
85 u8 command, u8 *values);
86 extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
87 u8 command, u8 length,
89 /* Returns the number of read bytes */
90 extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,
91 u8 command, u8 length, u8 *values);
92 extern s32 i2c_smbus_write_i2c_block_data(struct i2c_client * client,
93 u8 command, u8 length,
97 * A driver is capable of handling one or more physical devices present on
98 * I2C adapters. This information is used to inform the driver of adapter
101 * The driver.owner field should be set to the module owner of this driver.
102 * The driver.name field should be set to the name of this driver.
109 /* Notifies the driver that a new bus has appeared. This routine
110 * can be used by the driver to test if the bus meets its conditions
111 * & seek for the presence of the chip(s) it supports. If found, it
112 * registers the client(s) that are on the bus to the i2c admin. via
113 * i2c_attach_client. (LEGACY I2C DRIVERS ONLY)
115 int (*attach_adapter)(struct i2c_adapter *);
116 int (*detach_adapter)(struct i2c_adapter *);
118 /* tells the driver that a client is about to be deleted & gives it
119 * the chance to remove its private data. Also, if the client struct
120 * has been dynamically allocated by the driver in the function above,
121 * it must be freed here. (LEGACY I2C DRIVERS ONLY)
123 int (*detach_client)(struct i2c_client *);
125 /* Standard driver model interfaces, for "new style" i2c drivers.
126 * With the driver model, device enumeration is NEVER done by drivers;
127 * it's done by infrastructure. (NEW STYLE DRIVERS ONLY)
129 int (*probe)(struct i2c_client *);
130 int (*remove)(struct i2c_client *);
132 /* driver model interfaces that don't relate to enumeration */
133 void (*shutdown)(struct i2c_client *);
134 int (*suspend)(struct i2c_client *, pm_message_t mesg);
135 int (*resume)(struct i2c_client *);
137 /* a ioctl like command that can be used to perform specific functions
140 int (*command)(struct i2c_client *client,unsigned int cmd, void *arg);
142 struct device_driver driver;
144 #define to_i2c_driver(d) container_of(d, struct i2c_driver, driver)
146 #define I2C_NAME_SIZE 20
149 * struct i2c_client - represent an I2C slave device
150 * @flags: I2C_CLIENT_TEN indicates the device uses a ten bit chip address;
151 * I2C_CLIENT_PEC indicates it uses SMBus Packet Error Checking
152 * @addr: Address used on the I2C bus connected to the parent adapter.
153 * @name: Indicates the type of the device, usually a chip name that's
154 * generic enough to hide second-sourcing and compatible revisions.
155 * @adapter: manages the bus segment hosting this I2C device
156 * @driver: device's driver, hence pointer to access routines
157 * @dev: Driver model device node for the slave.
158 * @irq: indicates the IRQ generated by this device (if any)
159 * @driver_name: Identifies new-style driver used with this device; also
160 * used as the module name for hotplug/coldplug modprobe support.
161 * @list: list of active/busy clients (DEPRECATED)
162 * @released: used to synchronize client releases & detaches and references
164 * An i2c_client identifies a single device (i.e. chip) connected to an
165 * i2c bus. The behaviour exposed to Linux is defined by the driver
166 * managing the device.
169 unsigned short flags; /* div., see below */
170 unsigned short addr; /* chip address - NOTE: 7bit */
171 /* addresses are stored in the */
173 char name[I2C_NAME_SIZE];
174 struct i2c_adapter *adapter; /* the adapter we sit on */
175 struct i2c_driver *driver; /* and our access routines */
176 struct device dev; /* the device structure */
177 int irq; /* irq issued by device (or -1) */
178 char driver_name[KOBJ_NAME_LEN];
179 struct list_head list; /* DEPRECATED */
180 struct completion released;
182 #define to_i2c_client(d) container_of(d, struct i2c_client, dev)
184 extern struct i2c_client *i2c_verify_client(struct device *dev);
186 static inline struct i2c_client *kobj_to_i2c_client(struct kobject *kobj)
188 struct device * const dev = container_of(kobj, struct device, kobj);
189 return to_i2c_client(dev);
192 static inline void *i2c_get_clientdata (struct i2c_client *dev)
194 return dev_get_drvdata (&dev->dev);
197 static inline void i2c_set_clientdata (struct i2c_client *dev, void *data)
199 dev_set_drvdata (&dev->dev, data);
203 * struct i2c_board_info - template for device creation
204 * @driver_name: identifies the driver to be bound to the device
205 * @type: optional chip type information, to initialize i2c_client.name
206 * @flags: to initialize i2c_client.flags
207 * @addr: stored in i2c_client.addr
208 * @platform_data: stored in i2c_client.dev.platform_data
209 * @irq: stored in i2c_client.irq
211 * I2C doesn't actually support hardware probing, although controllers and
212 * devices may be able to use I2C_SMBUS_QUICK to tell whether or not there's
213 * a device at a given address. Drivers commonly need more information than
214 * that, such as chip type, configuration, associated IRQ, and so on.
216 * i2c_board_info is used to build tables of information listing I2C devices
217 * that are present. This information is used to grow the driver model tree
218 * for "new style" I2C drivers. For mainboards this is done statically using
219 * i2c_register_board_info(); bus numbers identify adapters that aren't
220 * yet available. For add-on boards, i2c_new_device() does this dynamically
221 * with the adapter already known.
223 struct i2c_board_info {
224 char driver_name[KOBJ_NAME_LEN];
225 char type[I2C_NAME_SIZE];
226 unsigned short flags;
233 * I2C_BOARD_INFO - macro used to list an i2c device and its driver
234 * @driver: identifies the driver to use with the device
235 * @dev_addr: the device's address on the bus.
237 * This macro initializes essential fields of a struct i2c_board_info,
238 * declaring what has been provided on a particular board. Optional
239 * fields (such as the chip type, its associated irq, or device-specific
240 * platform_data) are provided using conventional syntax.
242 #define I2C_BOARD_INFO(driver,dev_addr) \
243 .driver_name = (driver), .addr = (dev_addr)
246 /* Add-on boards should register/unregister their devices; e.g. a board
247 * with integrated I2C, a config eeprom, sensors, and a codec that's
248 * used in conjunction with the primary hardware.
250 extern struct i2c_client *
251 i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info);
253 /* If you don't know the exact address of an I2C device, use this variant
254 * instead, which can probe for device presence in a list of possible
257 extern struct i2c_client *
258 i2c_new_probed_device(struct i2c_adapter *adap,
259 struct i2c_board_info *info,
260 unsigned short const *addr_list);
262 /* For devices that use several addresses, use i2c_new_dummy() to make
263 * client handles for the extra addresses.
265 extern struct i2c_client *
266 i2c_new_dummy(struct i2c_adapter *adap, u16 address, const char *type);
268 extern void i2c_unregister_device(struct i2c_client *);
270 /* Mainboard arch_initcall() code should register all its I2C devices.
271 * This is done at arch_initcall time, before declaring any i2c adapters.
272 * Modules for add-on boards must use other calls.
275 i2c_register_board_info(int busnum, struct i2c_board_info const *info, unsigned n);
279 * The following structs are for those who like to implement new bus drivers:
280 * i2c_algorithm is the interface to a class of hardware solutions which can
281 * be addressed using the same bus algorithms - i.e. bit-banging or the PCF8584
282 * to name two of the most common.
284 struct i2c_algorithm {
285 /* If an adapter algorithm can't do I2C-level access, set master_xfer
286 to NULL. If an adapter algorithm can do SMBus access, set
287 smbus_xfer. If set to NULL, the SMBus protocol is simulated
288 using common I2C messages */
289 /* master_xfer should return the number of messages successfully
290 processed, or a negative value on error */
291 int (*master_xfer)(struct i2c_adapter *adap,struct i2c_msg *msgs,
293 int (*smbus_xfer) (struct i2c_adapter *adap, u16 addr,
294 unsigned short flags, char read_write,
295 u8 command, int size, union i2c_smbus_data * data);
297 /* To determine what the adapter supports */
298 u32 (*functionality) (struct i2c_adapter *);
302 * i2c_adapter is the structure used to identify a physical i2c bus along
303 * with the access algorithms necessary to access it.
306 struct module *owner;
309 const struct i2c_algorithm *algo; /* the algorithm to access the bus */
312 /* --- administration stuff. */
313 int (*client_register)(struct i2c_client *);
314 int (*client_unregister)(struct i2c_client *);
316 /* data fields that are valid for all devices */
317 u8 level; /* nesting level for lockdep */
318 struct mutex bus_lock;
319 struct mutex clist_lock;
323 struct device dev; /* the adapter device */
326 struct list_head clients; /* DEPRECATED */
328 struct completion dev_released;
330 #define to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev)
332 static inline void *i2c_get_adapdata (struct i2c_adapter *dev)
334 return dev_get_drvdata (&dev->dev);
337 static inline void i2c_set_adapdata (struct i2c_adapter *dev, void *data)
339 dev_set_drvdata (&dev->dev, data);
342 /*flags for the client struct: */
343 #define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */
344 #define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */
345 /* Must equal I2C_M_TEN below */
346 #define I2C_CLIENT_WAKE 0x80 /* for board_info; true iff can wake */
348 /* i2c adapter classes (bitmask) */
349 #define I2C_CLASS_HWMON (1<<0) /* lm_sensors, ... */
350 #define I2C_CLASS_TV_ANALOG (1<<1) /* bttv + friends */
351 #define I2C_CLASS_TV_DIGITAL (1<<2) /* dvb cards */
352 #define I2C_CLASS_DDC (1<<3) /* i2c-matroxfb ? */
353 #define I2C_CLASS_CAM_ANALOG (1<<4) /* camera with analog CCD */
354 #define I2C_CLASS_CAM_DIGITAL (1<<5) /* most webcams */
355 #define I2C_CLASS_SOUND (1<<6) /* sound devices */
356 #define I2C_CLASS_ALL (UINT_MAX) /* all of the above */
358 /* i2c_client_address_data is the struct for holding default client
359 * addresses for a driver and for the parameters supplied on the
362 struct i2c_client_address_data {
363 const unsigned short *normal_i2c;
364 const unsigned short *probe;
365 const unsigned short *ignore;
366 const unsigned short * const *forces;
369 /* Internal numbers to terminate lists */
370 #define I2C_CLIENT_END 0xfffeU
372 /* The numbers to use to set I2C bus address */
373 #define ANY_I2C_BUS 0xffff
376 /* ----- functions exported by i2c.o */
380 extern int i2c_add_adapter(struct i2c_adapter *);
381 extern int i2c_del_adapter(struct i2c_adapter *);
382 extern int i2c_add_numbered_adapter(struct i2c_adapter *);
384 extern int i2c_register_driver(struct module *, struct i2c_driver *);
385 extern void i2c_del_driver(struct i2c_driver *);
387 static inline int i2c_add_driver(struct i2c_driver *driver)
389 return i2c_register_driver(THIS_MODULE, driver);
392 extern int i2c_attach_client(struct i2c_client *);
393 extern int i2c_detach_client(struct i2c_client *);
395 extern struct i2c_client *i2c_use_client(struct i2c_client *client);
396 extern void i2c_release_client(struct i2c_client *client);
398 /* call the i2c_client->command() of all attached clients with
399 * the given arguments */
400 extern void i2c_clients_command(struct i2c_adapter *adap,
401 unsigned int cmd, void *arg);
403 /* Detect function. It iterates over all possible addresses itself.
404 * It will only call found_proc if some client is connected at the
405 * specific address (unless a 'force' matched);
407 extern int i2c_probe(struct i2c_adapter *adapter,
408 const struct i2c_client_address_data *address_data,
409 int (*found_proc) (struct i2c_adapter *, int, int));
411 extern struct i2c_adapter* i2c_get_adapter(int id);
412 extern void i2c_put_adapter(struct i2c_adapter *adap);
415 /* Return the functionality mask */
416 static inline u32 i2c_get_functionality(struct i2c_adapter *adap)
418 return adap->algo->functionality(adap);
421 /* Return 1 if adapter supports everything we need, 0 if not. */
422 static inline int i2c_check_functionality(struct i2c_adapter *adap, u32 func)
424 return (func & i2c_get_functionality(adap)) == func;
427 /* Return id number for a specific adapter */
428 static inline int i2c_adapter_id(struct i2c_adapter *adap)
432 #endif /* __KERNEL__ */
435 * struct i2c_msg - an I2C transaction segment beginning with START
436 * @addr: Slave address, either seven or ten bits. When this is a ten
437 * bit address, I2C_M_TEN must be set in @flags and the adapter
438 * must support I2C_FUNC_10BIT_ADDR.
439 * @flags: I2C_M_RD is handled by all adapters. No other flags may be
440 * provided unless the adapter exported the relevant I2C_FUNC_*
441 * flags through i2c_check_functionality().
442 * @len: Number of data bytes in @buf being read from or written to the
443 * I2C slave address. For read transactions where I2C_M_RECV_LEN
444 * is set, the caller guarantees that this buffer can hold up to
445 * 32 bytes in addition to the initial length byte sent by the
446 * slave (plus, if used, the SMBus PEC); and this value will be
447 * incremented by the number of block data bytes received.
448 * @buf: The buffer into which data is read, or from which it's written.
450 * An i2c_msg is the low level representation of one segment of an I2C
451 * transaction. It is visible to drivers in the @i2c_transfer() procedure,
452 * to userspace from i2c-dev, and to I2C adapter drivers through the
453 * @i2c_adapter.@master_xfer() method.
455 * Except when I2C "protocol mangling" is used, all I2C adapters implement
456 * the standard rules for I2C transactions. Each transaction begins with a
457 * START. That is followed by the slave address, and a bit encoding read
458 * versus write. Then follow all the data bytes, possibly including a byte
459 * with SMBus PEC. The transfer terminates with a NAK, or when all those
460 * bytes have been transferred and ACKed. If this is the last message in a
461 * group, it is followed by a STOP. Otherwise it is followed by the next
462 * @i2c_msg transaction segment, beginning with a (repeated) START.
464 * Alternatively, when the adapter supports I2C_FUNC_PROTOCOL_MANGLING then
465 * passing certain @flags may have changed those standard protocol behaviors.
466 * Those flags are only for use with broken/nonconforming slaves, and with
467 * adapters which are known to support the specific mangling options they
468 * need (one or more of IGNORE_NAK, NO_RD_ACK, NOSTART, and REV_DIR_ADDR).
471 __u16 addr; /* slave address */
473 #define I2C_M_TEN 0x0010 /* this is a ten bit chip address */
474 #define I2C_M_RD 0x0001 /* read data, from slave to master */
475 #define I2C_M_NOSTART 0x4000 /* if I2C_FUNC_PROTOCOL_MANGLING */
476 #define I2C_M_REV_DIR_ADDR 0x2000 /* if I2C_FUNC_PROTOCOL_MANGLING */
477 #define I2C_M_IGNORE_NAK 0x1000 /* if I2C_FUNC_PROTOCOL_MANGLING */
478 #define I2C_M_NO_RD_ACK 0x0800 /* if I2C_FUNC_PROTOCOL_MANGLING */
479 #define I2C_M_RECV_LEN 0x0400 /* length will be first received byte */
480 __u16 len; /* msg length */
481 __u8 *buf; /* pointer to msg data */
484 /* To determine what functionality is present */
486 #define I2C_FUNC_I2C 0x00000001
487 #define I2C_FUNC_10BIT_ADDR 0x00000002
488 #define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
489 #define I2C_FUNC_SMBUS_PEC 0x00000008
490 #define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */
491 #define I2C_FUNC_SMBUS_QUICK 0x00010000
492 #define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
493 #define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
494 #define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
495 #define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
496 #define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
497 #define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
498 #define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
499 #define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
500 #define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
501 #define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */
502 #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */
503 #define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 0x10000000 /* I2C-like block xfer */
504 #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */
506 #define I2C_FUNC_SMBUS_BYTE (I2C_FUNC_SMBUS_READ_BYTE | \
507 I2C_FUNC_SMBUS_WRITE_BYTE)
508 #define I2C_FUNC_SMBUS_BYTE_DATA (I2C_FUNC_SMBUS_READ_BYTE_DATA | \
509 I2C_FUNC_SMBUS_WRITE_BYTE_DATA)
510 #define I2C_FUNC_SMBUS_WORD_DATA (I2C_FUNC_SMBUS_READ_WORD_DATA | \
511 I2C_FUNC_SMBUS_WRITE_WORD_DATA)
512 #define I2C_FUNC_SMBUS_BLOCK_DATA (I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
513 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA)
514 #define I2C_FUNC_SMBUS_I2C_BLOCK (I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
515 I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)
516 #define I2C_FUNC_SMBUS_I2C_BLOCK_2 (I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 | \
517 I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2)
519 #define I2C_FUNC_SMBUS_EMUL (I2C_FUNC_SMBUS_QUICK | \
520 I2C_FUNC_SMBUS_BYTE | \
521 I2C_FUNC_SMBUS_BYTE_DATA | \
522 I2C_FUNC_SMBUS_WORD_DATA | \
523 I2C_FUNC_SMBUS_PROC_CALL | \
524 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
525 I2C_FUNC_SMBUS_I2C_BLOCK | \
529 * Data for SMBus Messages
531 #define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */
532 union i2c_smbus_data {
535 __u8 block[I2C_SMBUS_BLOCK_MAX + 2]; /* block[0] is used for length */
536 /* and one more for user-space compatibility */
539 /* smbus_access read or write markers */
540 #define I2C_SMBUS_READ 1
541 #define I2C_SMBUS_WRITE 0
543 /* SMBus transaction types (size parameter in the above functions)
544 Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
545 #define I2C_SMBUS_QUICK 0
546 #define I2C_SMBUS_BYTE 1
547 #define I2C_SMBUS_BYTE_DATA 2
548 #define I2C_SMBUS_WORD_DATA 3
549 #define I2C_SMBUS_PROC_CALL 4
550 #define I2C_SMBUS_BLOCK_DATA 5
551 #define I2C_SMBUS_I2C_BLOCK_BROKEN 6
552 #define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */
553 #define I2C_SMBUS_I2C_BLOCK_DATA 8
558 /* These defines are used for probing i2c client addresses */
559 /* The length of the option lists */
560 #define I2C_CLIENT_MAX_OPTS 48
562 /* Default fill of many variables */
563 #define I2C_CLIENT_DEFAULTS {I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
564 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
565 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
566 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
567 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
568 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
569 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
570 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
571 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
572 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
573 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
574 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
575 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
576 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
577 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
578 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END}
580 /* I2C_CLIENT_MODULE_PARM creates a module parameter, and puts it in the
583 #define I2C_CLIENT_MODULE_PARM(var,desc) \
584 static unsigned short var[I2C_CLIENT_MAX_OPTS] = I2C_CLIENT_DEFAULTS; \
585 static unsigned int var##_num; \
586 module_param_array(var, short, &var##_num, 0); \
587 MODULE_PARM_DESC(var,desc)
589 #define I2C_CLIENT_MODULE_PARM_FORCE(name) \
590 I2C_CLIENT_MODULE_PARM(force_##name, \
591 "List of adapter,address pairs which are " \
592 "unquestionably assumed to contain a `" \
596 #define I2C_CLIENT_INSMOD_COMMON \
597 I2C_CLIENT_MODULE_PARM(probe, "List of adapter,address pairs to scan " \
599 I2C_CLIENT_MODULE_PARM(ignore, "List of adapter,address pairs not to " \
601 const static struct i2c_client_address_data addr_data = { \
602 .normal_i2c = normal_i2c, \
608 #define I2C_CLIENT_FORCE_TEXT \
609 "List of adapter,address pairs to boldly assume to be present"
611 /* These are the ones you want to use in your own drivers. Pick the one
612 which matches the number of devices the driver differenciates between. */
613 #define I2C_CLIENT_INSMOD \
614 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
615 static const unsigned short * const forces[] = { force, NULL }; \
616 I2C_CLIENT_INSMOD_COMMON
618 #define I2C_CLIENT_INSMOD_1(chip1) \
619 enum chips { any_chip, chip1 }; \
620 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
621 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
622 static const unsigned short * const forces[] = { force, \
623 force_##chip1, NULL }; \
624 I2C_CLIENT_INSMOD_COMMON
626 #define I2C_CLIENT_INSMOD_2(chip1, chip2) \
627 enum chips { any_chip, chip1, chip2 }; \
628 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
629 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
630 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
631 static const unsigned short * const forces[] = { force, \
632 force_##chip1, force_##chip2, NULL }; \
633 I2C_CLIENT_INSMOD_COMMON
635 #define I2C_CLIENT_INSMOD_3(chip1, chip2, chip3) \
636 enum chips { any_chip, chip1, chip2, chip3 }; \
637 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
638 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
639 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
640 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
641 static const unsigned short * const forces[] = { force, \
642 force_##chip1, force_##chip2, force_##chip3, NULL }; \
643 I2C_CLIENT_INSMOD_COMMON
645 #define I2C_CLIENT_INSMOD_4(chip1, chip2, chip3, chip4) \
646 enum chips { any_chip, chip1, chip2, chip3, chip4 }; \
647 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
648 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
649 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
650 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
651 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
652 static const unsigned short * const forces[] = { force, \
653 force_##chip1, force_##chip2, force_##chip3, \
654 force_##chip4, NULL}; \
655 I2C_CLIENT_INSMOD_COMMON
657 #define I2C_CLIENT_INSMOD_5(chip1, chip2, chip3, chip4, chip5) \
658 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5 }; \
659 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
660 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
661 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
662 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
663 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
664 I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
665 static const unsigned short * const forces[] = { force, \
666 force_##chip1, force_##chip2, force_##chip3, \
667 force_##chip4, force_##chip5, NULL }; \
668 I2C_CLIENT_INSMOD_COMMON
670 #define I2C_CLIENT_INSMOD_6(chip1, chip2, chip3, chip4, chip5, chip6) \
671 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6 }; \
672 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
673 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
674 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
675 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
676 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
677 I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
678 I2C_CLIENT_MODULE_PARM_FORCE(chip6); \
679 static const unsigned short * const forces[] = { force, \
680 force_##chip1, force_##chip2, force_##chip3, \
681 force_##chip4, force_##chip5, force_##chip6, NULL }; \
682 I2C_CLIENT_INSMOD_COMMON
684 #define I2C_CLIENT_INSMOD_7(chip1, chip2, chip3, chip4, chip5, chip6, chip7) \
685 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, \
687 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
688 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
689 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
690 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
691 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
692 I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
693 I2C_CLIENT_MODULE_PARM_FORCE(chip6); \
694 I2C_CLIENT_MODULE_PARM_FORCE(chip7); \
695 static const unsigned short * const forces[] = { force, \
696 force_##chip1, force_##chip2, force_##chip3, \
697 force_##chip4, force_##chip5, force_##chip6, \
698 force_##chip7, NULL }; \
699 I2C_CLIENT_INSMOD_COMMON
701 #define I2C_CLIENT_INSMOD_8(chip1, chip2, chip3, chip4, chip5, chip6, chip7, chip8) \
702 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, \
704 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
705 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
706 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
707 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
708 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
709 I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
710 I2C_CLIENT_MODULE_PARM_FORCE(chip6); \
711 I2C_CLIENT_MODULE_PARM_FORCE(chip7); \
712 I2C_CLIENT_MODULE_PARM_FORCE(chip8); \
713 static const unsigned short * const forces[] = { force, \
714 force_##chip1, force_##chip2, force_##chip3, \
715 force_##chip4, force_##chip5, force_##chip6, \
716 force_##chip7, force_##chip8, NULL }; \
717 I2C_CLIENT_INSMOD_COMMON
718 #endif /* __KERNEL__ */
719 #endif /* _LINUX_I2C_H */