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> */
26 /* $Id: i2c.h,v 1.68 2003/01/21 08:08:16 kmalkki Exp $ */
31 #include <linux/module.h>
32 #include <linux/types.h>
33 #include <linux/i2c-id.h>
34 #include <linux/device.h> /* for struct device */
35 #include <asm/semaphore.h>
37 /* --- For i2c-isa ---------------------------------------------------- */
39 extern void i2c_adapter_dev_release(struct device *dev);
40 extern struct device_driver i2c_adapter_driver;
41 extern struct class i2c_adapter_class;
42 extern struct bus_type i2c_bus_type;
44 /* --- General options ------------------------------------------------ */
51 struct i2c_client_address_data;
55 * The master routines are the ones normally used to transmit data to devices
56 * on a bus (or read from them). Apart from two basic transfer functions to
57 * transmit one message at a time, a more complex version can be used to
58 * transmit an arbitrary number of messages without interruption.
60 extern int i2c_master_send(struct i2c_client *,const char* ,int);
61 extern int i2c_master_recv(struct i2c_client *,char* ,int);
63 /* Transfer num messages.
65 extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num);
68 * Some adapter types (i.e. PCF 8584 based ones) may support slave behaviuor.
69 * This is not tested/implemented yet and will change in the future.
71 extern int i2c_slave_send(struct i2c_client *,char*,int);
72 extern int i2c_slave_recv(struct i2c_client *,char*,int);
76 /* This is the very generalized SMBus access routine. You probably do not
77 want to use this, though; one of the functions below may be much easier,
78 and probably just as fast.
79 Note that we use i2c_adapter here, because you do not need a specific
80 smbus adapter to call this function. */
81 extern s32 i2c_smbus_xfer (struct i2c_adapter * adapter, u16 addr,
83 char read_write, u8 command, int size,
84 union i2c_smbus_data * data);
86 /* Now follow the 'nice' access routines. These also document the calling
87 conventions of smbus_access. */
89 extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value);
90 extern s32 i2c_smbus_read_byte(struct i2c_client * client);
91 extern s32 i2c_smbus_write_byte(struct i2c_client * client, u8 value);
92 extern s32 i2c_smbus_read_byte_data(struct i2c_client * client, u8 command);
93 extern s32 i2c_smbus_write_byte_data(struct i2c_client * client,
94 u8 command, u8 value);
95 extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);
96 extern s32 i2c_smbus_write_word_data(struct i2c_client * client,
97 u8 command, u16 value);
98 /* Returns the number of bytes transferred */
99 extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
100 u8 command, u8 length,
102 extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,
103 u8 command, u8 *values);
106 * A driver is capable of handling one or more physical devices present on
107 * I2C adapters. This information is used to inform the driver of adapter
112 struct module *owner;
116 unsigned int flags; /* div., see below */
118 /* Notifies the driver that a new bus has appeared. This routine
119 * can be used by the driver to test if the bus meets its conditions
120 * & seek for the presence of the chip(s) it supports. If found, it
121 * registers the client(s) that are on the bus to the i2c admin. via
124 int (*attach_adapter)(struct i2c_adapter *);
125 int (*detach_adapter)(struct i2c_adapter *);
127 /* tells the driver that a client is about to be deleted & gives it
128 * the chance to remove its private data. Also, if the client struct
129 * has been dynamically allocated by the driver in the function above,
130 * it must be freed here.
132 int (*detach_client)(struct i2c_client *);
134 /* a ioctl like command that can be used to perform specific functions
137 int (*command)(struct i2c_client *client,unsigned int cmd, void *arg);
139 struct device_driver driver;
140 struct list_head list;
142 #define to_i2c_driver(d) container_of(d, struct i2c_driver, driver)
144 #define I2C_NAME_SIZE 50
147 * i2c_client identifies a single device (i.e. chip) that is connected to an
148 * i2c bus. The behaviour is defined by the routines of the driver. This
149 * function is mainly used for lookup & other admin. functions.
152 unsigned int flags; /* div., see below */
153 unsigned int addr; /* chip address - NOTE: 7bit */
154 /* addresses are stored in the */
155 /* _LOWER_ 7 bits of this char */
156 /* addr: unsigned int to make lm_sensors i2c-isa adapter work
157 more cleanly. It does not take any more memory space, due to
158 alignment considerations */
159 struct i2c_adapter *adapter; /* the adapter we sit on */
160 struct i2c_driver *driver; /* and our access routines */
161 int usage_count; /* How many accesses currently */
163 struct device dev; /* the device structure */
164 struct list_head list;
165 char name[I2C_NAME_SIZE];
166 struct completion released;
168 #define to_i2c_client(d) container_of(d, struct i2c_client, dev)
170 static inline struct i2c_client *kobj_to_i2c_client(struct kobject *kobj)
172 return to_i2c_client(container_of(kobj, struct device, kobj));
175 static inline void *i2c_get_clientdata (struct i2c_client *dev)
177 return dev_get_drvdata (&dev->dev);
180 static inline void i2c_set_clientdata (struct i2c_client *dev, void *data)
182 dev_set_drvdata (&dev->dev, data);
185 #define I2C_DEVNAME(str) .name = str
187 static inline char *i2c_clientname(struct i2c_client *c)
193 * The following structs are for those who like to implement new bus drivers:
194 * i2c_algorithm is the interface to a class of hardware solutions which can
195 * be addressed using the same bus algorithms - i.e. bit-banging or the PCF8584
196 * to name two of the most common.
198 struct i2c_algorithm {
199 char name[32]; /* textual description */
202 /* If an adapter algorithm can't do I2C-level access, set master_xfer
203 to NULL. If an adapter algorithm can do SMBus access, set
204 smbus_xfer. If set to NULL, the SMBus protocol is simulated
205 using common I2C messages */
206 int (*master_xfer)(struct i2c_adapter *adap,struct i2c_msg *msgs,
208 int (*smbus_xfer) (struct i2c_adapter *adap, u16 addr,
209 unsigned short flags, char read_write,
210 u8 command, int size, union i2c_smbus_data * data);
212 /* --- these optional/future use for some adapter types.*/
213 int (*slave_send)(struct i2c_adapter *,char*,int);
214 int (*slave_recv)(struct i2c_adapter *,char*,int);
216 /* --- ioctl like call to set div. parameters. */
217 int (*algo_control)(struct i2c_adapter *, unsigned int, unsigned long);
219 /* To determine what the adapter supports */
220 u32 (*functionality) (struct i2c_adapter *);
224 * i2c_adapter is the structure used to identify a physical i2c bus along
225 * with the access algorithms necessary to access it.
228 struct module *owner;
229 unsigned int id;/* == is algo->id | hwdep.struct->id, */
230 /* for registered values see below */
232 struct i2c_algorithm *algo;/* the algorithm to access the bus */
235 /* --- administration stuff. */
236 int (*client_register)(struct i2c_client *);
237 int (*client_unregister)(struct i2c_client *);
239 /* data fields that are valid for all devices */
240 struct semaphore bus_lock;
241 struct semaphore clist_lock;
245 struct device dev; /* the adapter device */
246 struct class_device class_dev; /* the class device */
248 #ifdef CONFIG_PROC_FS
249 /* No need to set this when you initialize the adapter */
251 #endif /* def CONFIG_PROC_FS */
254 struct list_head clients;
255 struct list_head list;
256 char name[I2C_NAME_SIZE];
257 struct completion dev_released;
258 struct completion class_dev_released;
260 #define dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev)
261 #define class_dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, class_dev)
263 static inline void *i2c_get_adapdata (struct i2c_adapter *dev)
265 return dev_get_drvdata (&dev->dev);
268 static inline void i2c_set_adapdata (struct i2c_adapter *dev, void *data)
270 dev_set_drvdata (&dev->dev, data);
273 /*flags for the driver struct: */
274 #define I2C_DF_NOTIFY 0x01 /* notify on bus (de/a)ttaches */
276 /* this flag is gone -- there is a (optional) driver->detach_adapter
277 * callback now which can be used instead */
278 # define I2C_DF_DUMMY 0x02
281 /*flags for the client struct: */
282 #define I2C_CLIENT_ALLOW_USE 0x01 /* Client allows access */
283 #define I2C_CLIENT_ALLOW_MULTIPLE_USE 0x02 /* Allow multiple access-locks */
284 /* on an i2c_client */
285 #define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */
286 #define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */
287 /* Must equal I2C_M_TEN below */
289 /* i2c adapter classes (bitmask) */
290 #define I2C_CLASS_HWMON (1<<0) /* lm_sensors, ... */
291 #define I2C_CLASS_TV_ANALOG (1<<1) /* bttv + friends */
292 #define I2C_CLASS_TV_DIGITAL (1<<2) /* dvb cards */
293 #define I2C_CLASS_DDC (1<<3) /* i2c-matroxfb ? */
294 #define I2C_CLASS_CAM_ANALOG (1<<4) /* camera with analog CCD */
295 #define I2C_CLASS_CAM_DIGITAL (1<<5) /* most webcams */
296 #define I2C_CLASS_SOUND (1<<6) /* sound devices */
297 #define I2C_CLASS_ALL (UINT_MAX) /* all of the above */
299 /* i2c_client_address_data is the struct for holding default client
300 * addresses for a driver and for the parameters supplied on the
303 struct i2c_client_address_data {
304 unsigned short *normal_i2c;
305 unsigned short *probe;
306 unsigned short *ignore;
307 unsigned short *force;
310 /* Internal numbers to terminate lists */
311 #define I2C_CLIENT_END 0xfffeU
312 #define I2C_CLIENT_ISA_END 0xfffefffeU
314 /* The numbers to use to set I2C bus address */
315 #define ANY_I2C_BUS 0xffff
316 #define ANY_I2C_ISA_BUS 9191
319 /* ----- functions exported by i2c.o */
323 extern int i2c_add_adapter(struct i2c_adapter *);
324 extern int i2c_del_adapter(struct i2c_adapter *);
326 extern int i2c_add_driver(struct i2c_driver *);
327 extern int i2c_del_driver(struct i2c_driver *);
329 extern int i2c_attach_client(struct i2c_client *);
330 extern int i2c_detach_client(struct i2c_client *);
332 /* New function: This is to get an i2c_client-struct for controlling the
333 client either by using i2c_control-function or having the
334 client-module export functions that can be used with the i2c_client
336 extern struct i2c_client *i2c_get_client(int driver_id, int adapter_id,
337 struct i2c_client *prev);
339 /* Should be used with new function
340 extern struct i2c_client *i2c_get_client(int,int,struct i2c_client *);
341 to make sure that client-struct is valid and that it is okay to access
343 returns -EACCES if client doesn't allow use (default)
344 returns -EBUSY if client doesn't allow multiple use (default) and
346 extern int i2c_use_client(struct i2c_client *);
347 extern int i2c_release_client(struct i2c_client *);
349 /* call the i2c_client->command() of all attached clients with
350 * the given arguments */
351 extern void i2c_clients_command(struct i2c_adapter *adap,
352 unsigned int cmd, void *arg);
354 /* returns -EBUSY if address has been taken, 0 if not. Note that the only
355 other place at which this is called is within i2c_attach_client; so
356 you can cheat by simply not registering. Not recommended, of course! */
357 extern int i2c_check_addr (struct i2c_adapter *adapter, int addr);
359 /* Detect function. It iterates over all possible addresses itself.
360 * It will only call found_proc if some client is connected at the
361 * specific address (unless a 'force' matched);
363 extern int i2c_probe(struct i2c_adapter *adapter,
364 struct i2c_client_address_data *address_data,
365 int (*found_proc) (struct i2c_adapter *, int, int));
367 /* An ioctl like call to set div. parameters of the adapter.
369 extern int i2c_control(struct i2c_client *,unsigned int, unsigned long);
371 /* This call returns a unique low identifier for each registered adapter,
372 * or -1 if the adapter was not registered.
374 extern int i2c_adapter_id(struct i2c_adapter *adap);
375 extern struct i2c_adapter* i2c_get_adapter(int id);
376 extern void i2c_put_adapter(struct i2c_adapter *adap);
379 /* Return the functionality mask */
380 static inline u32 i2c_get_functionality(struct i2c_adapter *adap)
382 return adap->algo->functionality(adap);
385 /* Return 1 if adapter supports everything we need, 0 if not. */
386 static inline int i2c_check_functionality(struct i2c_adapter *adap, u32 func)
388 return (func & i2c_get_functionality(adap)) == func;
392 * I2C Message - used for pure i2c transaction, also from /dev interface
395 __u16 addr; /* slave address */
397 #define I2C_M_TEN 0x10 /* we have a ten bit chip address */
398 #define I2C_M_RD 0x01
399 #define I2C_M_NOSTART 0x4000
400 #define I2C_M_REV_DIR_ADDR 0x2000
401 #define I2C_M_IGNORE_NAK 0x1000
402 #define I2C_M_NO_RD_ACK 0x0800
403 __u16 len; /* msg length */
404 __u8 *buf; /* pointer to msg data */
407 /* To determine what functionality is present */
409 #define I2C_FUNC_I2C 0x00000001
410 #define I2C_FUNC_10BIT_ADDR 0x00000002
411 #define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
412 #define I2C_FUNC_SMBUS_HWPEC_CALC 0x00000008 /* SMBus 2.0 */
413 #define I2C_FUNC_SMBUS_READ_WORD_DATA_PEC 0x00000800 /* SMBus 2.0 */
414 #define I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC 0x00001000 /* SMBus 2.0 */
415 #define I2C_FUNC_SMBUS_PROC_CALL_PEC 0x00002000 /* SMBus 2.0 */
416 #define I2C_FUNC_SMBUS_BLOCK_PROC_CALL_PEC 0x00004000 /* SMBus 2.0 */
417 #define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */
418 #define I2C_FUNC_SMBUS_QUICK 0x00010000
419 #define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
420 #define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
421 #define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
422 #define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
423 #define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
424 #define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
425 #define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
426 #define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
427 #define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
428 #define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */
429 #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */
430 #define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 0x10000000 /* I2C-like block xfer */
431 #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */
432 #define I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC 0x40000000 /* SMBus 2.0 */
433 #define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC 0x80000000 /* SMBus 2.0 */
435 #define I2C_FUNC_SMBUS_BYTE (I2C_FUNC_SMBUS_READ_BYTE | \
436 I2C_FUNC_SMBUS_WRITE_BYTE)
437 #define I2C_FUNC_SMBUS_BYTE_DATA (I2C_FUNC_SMBUS_READ_BYTE_DATA | \
438 I2C_FUNC_SMBUS_WRITE_BYTE_DATA)
439 #define I2C_FUNC_SMBUS_WORD_DATA (I2C_FUNC_SMBUS_READ_WORD_DATA | \
440 I2C_FUNC_SMBUS_WRITE_WORD_DATA)
441 #define I2C_FUNC_SMBUS_BLOCK_DATA (I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
442 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA)
443 #define I2C_FUNC_SMBUS_I2C_BLOCK (I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
444 I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)
445 #define I2C_FUNC_SMBUS_I2C_BLOCK_2 (I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 | \
446 I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2)
447 #define I2C_FUNC_SMBUS_BLOCK_DATA_PEC (I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC | \
448 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC)
449 #define I2C_FUNC_SMBUS_WORD_DATA_PEC (I2C_FUNC_SMBUS_READ_WORD_DATA_PEC | \
450 I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC)
452 #define I2C_FUNC_SMBUS_READ_BYTE_PEC I2C_FUNC_SMBUS_READ_BYTE_DATA
453 #define I2C_FUNC_SMBUS_WRITE_BYTE_PEC I2C_FUNC_SMBUS_WRITE_BYTE_DATA
454 #define I2C_FUNC_SMBUS_READ_BYTE_DATA_PEC I2C_FUNC_SMBUS_READ_WORD_DATA
455 #define I2C_FUNC_SMBUS_WRITE_BYTE_DATA_PEC I2C_FUNC_SMBUS_WRITE_WORD_DATA
456 #define I2C_FUNC_SMBUS_BYTE_PEC I2C_FUNC_SMBUS_BYTE_DATA
457 #define I2C_FUNC_SMBUS_BYTE_DATA_PEC I2C_FUNC_SMBUS_WORD_DATA
459 #define I2C_FUNC_SMBUS_EMUL (I2C_FUNC_SMBUS_QUICK | \
460 I2C_FUNC_SMBUS_BYTE | \
461 I2C_FUNC_SMBUS_BYTE_DATA | \
462 I2C_FUNC_SMBUS_WORD_DATA | \
463 I2C_FUNC_SMBUS_PROC_CALL | \
464 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
465 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC | \
466 I2C_FUNC_SMBUS_I2C_BLOCK)
469 * Data for SMBus Messages
471 #define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */
472 #define I2C_SMBUS_I2C_BLOCK_MAX 32 /* Not specified but we use same structure */
473 union i2c_smbus_data {
476 __u8 block[I2C_SMBUS_BLOCK_MAX + 3]; /* block[0] is used for length */
477 /* one more for read length in block process call */
478 /* and one more for PEC */
481 /* smbus_access read or write markers */
482 #define I2C_SMBUS_READ 1
483 #define I2C_SMBUS_WRITE 0
485 /* SMBus transaction types (size parameter in the above functions)
486 Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
487 #define I2C_SMBUS_QUICK 0
488 #define I2C_SMBUS_BYTE 1
489 #define I2C_SMBUS_BYTE_DATA 2
490 #define I2C_SMBUS_WORD_DATA 3
491 #define I2C_SMBUS_PROC_CALL 4
492 #define I2C_SMBUS_BLOCK_DATA 5
493 #define I2C_SMBUS_I2C_BLOCK_DATA 6
494 #define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */
495 #define I2C_SMBUS_BLOCK_DATA_PEC 8 /* SMBus 2.0 */
496 #define I2C_SMBUS_PROC_CALL_PEC 9 /* SMBus 2.0 */
497 #define I2C_SMBUS_BLOCK_PROC_CALL_PEC 10 /* SMBus 2.0 */
498 #define I2C_SMBUS_WORD_DATA_PEC 11 /* SMBus 2.0 */
501 /* ----- commands for the ioctl like i2c_command call:
502 * note that additional calls are defined in the algorithm and hw
503 * dependent layers - these can be listed here, or see the
504 * corresponding header files.
506 /* -> bit-adapter specific ioctls */
507 #define I2C_RETRIES 0x0701 /* number of times a device address */
508 /* should be polled when not */
510 #define I2C_TIMEOUT 0x0702 /* set timeout - call with int */
513 /* this is for i2c-dev.c */
514 #define I2C_SLAVE 0x0703 /* Change slave address */
515 /* Attn.: Slave address is 7 or 10 bits */
516 #define I2C_SLAVE_FORCE 0x0706 /* Change slave address */
517 /* Attn.: Slave address is 7 or 10 bits */
518 /* This changes the address, even if it */
519 /* is already taken! */
520 #define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */
522 #define I2C_FUNCS 0x0705 /* Get the adapter functionality */
523 #define I2C_RDWR 0x0707 /* Combined R/W transfer (one stop only)*/
524 #define I2C_PEC 0x0708 /* != 0 for SMBus PEC */
526 #define I2C_ACK_TEST 0x0710 /* See if a slave is at a specific address */
529 #define I2C_SMBUS 0x0720 /* SMBus-level access */
531 /* ... algo-bit.c recognizes */
532 #define I2C_UDELAY 0x0705 /* set delay in microsecs between each */
533 /* written byte (except address) */
534 #define I2C_MDELAY 0x0706 /* millisec delay between written bytes */
536 /* ----- I2C-DEV: char device interface stuff ------------------------- */
538 #define I2C_MAJOR 89 /* Device major number */
540 /* These defines are used for probing i2c client addresses */
541 /* The length of the option lists */
542 #define I2C_CLIENT_MAX_OPTS 48
544 /* Default fill of many variables */
545 #define I2C_CLIENT_DEFAULTS {I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
546 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
547 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
548 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
549 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
550 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
551 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
552 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
553 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
554 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
555 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
556 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
557 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
558 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
559 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
560 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END}
562 /* I2C_CLIENT_MODULE_PARM creates a module parameter, and puts it in the
565 #define I2C_CLIENT_MODULE_PARM(var,desc) \
566 static unsigned short var[I2C_CLIENT_MAX_OPTS] = I2C_CLIENT_DEFAULTS; \
567 static unsigned int var##_num; \
568 module_param_array(var, short, &var##_num, 0); \
569 MODULE_PARM_DESC(var,desc)
571 /* This is the one you want to use in your own modules */
572 #define I2C_CLIENT_INSMOD \
573 I2C_CLIENT_MODULE_PARM(probe, \
574 "List of adapter,address pairs to scan additionally"); \
575 I2C_CLIENT_MODULE_PARM(ignore, \
576 "List of adapter,address pairs not to scan"); \
577 I2C_CLIENT_MODULE_PARM(force, \
578 "List of adapter,address pairs to boldly assume " \
580 static struct i2c_client_address_data addr_data = { \
581 .normal_i2c = normal_i2c, \
587 /* Detect whether we are on the isa bus. If this returns true, all i2c
589 #define i2c_is_isa_client(clientptr) \
590 ((clientptr)->adapter->algo->id == I2C_ALGO_ISA)
591 #define i2c_is_isa_adapter(adapptr) \
592 ((adapptr)->algo->id == I2C_ALGO_ISA)
594 #endif /* _LINUX_I2C_H */