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 /* --- General options ------------------------------------------------ */
44 struct i2c_client_address_data;
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 * Some adapter types (i.e. PCF 8584 based ones) may support slave behaviuor.
62 * This is not tested/implemented yet and will change in the future.
64 extern int i2c_slave_send(struct i2c_client *,char*,int);
65 extern int i2c_slave_recv(struct i2c_client *,char*,int);
69 /* This is the very generalized SMBus access routine. You probably do not
70 want to use this, though; one of the functions below may be much easier,
71 and probably just as fast.
72 Note that we use i2c_adapter here, because you do not need a specific
73 smbus adapter to call this function. */
74 extern s32 i2c_smbus_xfer (struct i2c_adapter * adapter, u16 addr,
76 char read_write, u8 command, int size,
77 union i2c_smbus_data * data);
79 /* Now follow the 'nice' access routines. These also document the calling
80 conventions of smbus_access. */
82 extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value);
83 extern s32 i2c_smbus_read_byte(struct i2c_client * client);
84 extern s32 i2c_smbus_write_byte(struct i2c_client * client, u8 value);
85 extern s32 i2c_smbus_read_byte_data(struct i2c_client * client, u8 command);
86 extern s32 i2c_smbus_write_byte_data(struct i2c_client * client,
87 u8 command, u8 value);
88 extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);
89 extern s32 i2c_smbus_write_word_data(struct i2c_client * client,
90 u8 command, u16 value);
91 /* Returns the number of bytes transferred */
92 extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
93 u8 command, u8 length,
95 extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,
96 u8 command, u8 *values);
99 * A driver is capable of handling one or more physical devices present on
100 * I2C adapters. This information is used to inform the driver of adapter
105 struct module *owner;
109 unsigned int flags; /* div., see below */
111 /* Notifies the driver that a new bus has appeared. This routine
112 * can be used by the driver to test if the bus meets its conditions
113 * & seek for the presence of the chip(s) it supports. If found, it
114 * registers the client(s) that are on the bus to the i2c admin. via
117 int (*attach_adapter)(struct i2c_adapter *);
118 int (*detach_adapter)(struct i2c_adapter *);
120 /* tells the driver that a client is about to be deleted & gives it
121 * the chance to remove its private data. Also, if the client struct
122 * has been dynamically allocated by the driver in the function above,
123 * it must be freed here.
125 int (*detach_client)(struct i2c_client *);
127 /* a ioctl like command that can be used to perform specific functions
130 int (*command)(struct i2c_client *client,unsigned int cmd, void *arg);
132 struct device_driver driver;
133 struct list_head list;
135 #define to_i2c_driver(d) container_of(d, struct i2c_driver, driver)
137 #define I2C_NAME_SIZE 50
140 * i2c_client identifies a single device (i.e. chip) that is connected to an
141 * i2c bus. The behaviour is defined by the routines of the driver. This
142 * function is mainly used for lookup & other admin. functions.
145 unsigned int flags; /* div., see below */
146 unsigned int addr; /* chip address - NOTE: 7bit */
147 /* addresses are stored in the */
148 /* _LOWER_ 7 bits of this char */
149 /* addr: unsigned int to make lm_sensors i2c-isa adapter work
150 more cleanly. It does not take any more memory space, due to
151 alignment considerations */
152 struct i2c_adapter *adapter; /* the adapter we sit on */
153 struct i2c_driver *driver; /* and our access routines */
154 int usage_count; /* How many accesses currently */
156 struct device dev; /* the device structure */
157 struct list_head list;
158 char name[I2C_NAME_SIZE];
159 struct completion released;
161 #define to_i2c_client(d) container_of(d, struct i2c_client, dev)
163 static inline struct i2c_client *kobj_to_i2c_client(struct kobject *kobj)
165 return to_i2c_client(container_of(kobj, struct device, kobj));
168 static inline void *i2c_get_clientdata (struct i2c_client *dev)
170 return dev_get_drvdata (&dev->dev);
173 static inline void i2c_set_clientdata (struct i2c_client *dev, void *data)
175 dev_set_drvdata (&dev->dev, data);
178 #define I2C_DEVNAME(str) .name = str
180 static inline char *i2c_clientname(struct i2c_client *c)
186 * The following structs are for those who like to implement new bus drivers:
187 * i2c_algorithm is the interface to a class of hardware solutions which can
188 * be addressed using the same bus algorithms - i.e. bit-banging or the PCF8584
189 * to name two of the most common.
191 struct i2c_algorithm {
192 char name[32]; /* textual description */
195 /* If an adapter algorithm can't do I2C-level access, set master_xfer
196 to NULL. If an adapter algorithm can do SMBus access, set
197 smbus_xfer. If set to NULL, the SMBus protocol is simulated
198 using common I2C messages */
199 int (*master_xfer)(struct i2c_adapter *adap,struct i2c_msg *msgs,
201 int (*smbus_xfer) (struct i2c_adapter *adap, u16 addr,
202 unsigned short flags, char read_write,
203 u8 command, int size, union i2c_smbus_data * data);
205 /* --- these optional/future use for some adapter types.*/
206 int (*slave_send)(struct i2c_adapter *,char*,int);
207 int (*slave_recv)(struct i2c_adapter *,char*,int);
209 /* --- ioctl like call to set div. parameters. */
210 int (*algo_control)(struct i2c_adapter *, unsigned int, unsigned long);
212 /* To determine what the adapter supports */
213 u32 (*functionality) (struct i2c_adapter *);
217 * i2c_adapter is the structure used to identify a physical i2c bus along
218 * with the access algorithms necessary to access it.
221 struct module *owner;
222 unsigned int id;/* == is algo->id | hwdep.struct->id, */
223 /* for registered values see below */
225 struct i2c_algorithm *algo;/* the algorithm to access the bus */
228 /* --- administration stuff. */
229 int (*client_register)(struct i2c_client *);
230 int (*client_unregister)(struct i2c_client *);
232 /* data fields that are valid for all devices */
233 struct semaphore bus_lock;
234 struct semaphore clist_lock;
238 struct device dev; /* the adapter device */
239 struct class_device class_dev; /* the class device */
241 #ifdef CONFIG_PROC_FS
242 /* No need to set this when you initialize the adapter */
244 #endif /* def CONFIG_PROC_FS */
247 struct list_head clients;
248 struct list_head list;
249 char name[I2C_NAME_SIZE];
250 struct completion dev_released;
251 struct completion class_dev_released;
253 #define dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev)
254 #define class_dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, class_dev)
256 static inline void *i2c_get_adapdata (struct i2c_adapter *dev)
258 return dev_get_drvdata (&dev->dev);
261 static inline void i2c_set_adapdata (struct i2c_adapter *dev, void *data)
263 dev_set_drvdata (&dev->dev, data);
266 /*flags for the driver struct: */
267 #define I2C_DF_NOTIFY 0x01 /* notify on bus (de/a)ttaches */
269 /* this flag is gone -- there is a (optional) driver->detach_adapter
270 * callback now which can be used instead */
271 # define I2C_DF_DUMMY 0x02
274 /*flags for the client struct: */
275 #define I2C_CLIENT_ALLOW_USE 0x01 /* Client allows access */
276 #define I2C_CLIENT_ALLOW_MULTIPLE_USE 0x02 /* Allow multiple access-locks */
277 /* on an i2c_client */
278 #define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */
279 #define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */
280 /* Must equal I2C_M_TEN below */
282 /* i2c adapter classes (bitmask) */
283 #define I2C_CLASS_HWMON (1<<0) /* lm_sensors, ... */
284 #define I2C_CLASS_TV_ANALOG (1<<1) /* bttv + friends */
285 #define I2C_CLASS_TV_DIGITAL (1<<2) /* dvb cards */
286 #define I2C_CLASS_DDC (1<<3) /* i2c-matroxfb ? */
287 #define I2C_CLASS_CAM_ANALOG (1<<4) /* camera with analog CCD */
288 #define I2C_CLASS_CAM_DIGITAL (1<<5) /* most webcams */
289 #define I2C_CLASS_SOUND (1<<6) /* sound devices */
290 #define I2C_CLASS_ALL (UINT_MAX) /* all of the above */
292 /* i2c_client_address_data is the struct for holding default client
293 * addresses for a driver and for the parameters supplied on the
296 struct i2c_client_address_data {
297 unsigned short *normal_i2c;
298 unsigned short *probe;
299 unsigned short *ignore;
300 unsigned short *force;
303 /* Internal numbers to terminate lists */
304 #define I2C_CLIENT_END 0xfffeU
305 #define I2C_CLIENT_ISA_END 0xfffefffeU
307 /* The numbers to use to set I2C bus address */
308 #define ANY_I2C_BUS 0xffff
309 #define ANY_I2C_ISA_BUS 9191
312 /* ----- functions exported by i2c.o */
316 extern int i2c_add_adapter(struct i2c_adapter *);
317 extern int i2c_del_adapter(struct i2c_adapter *);
319 extern int i2c_add_driver(struct i2c_driver *);
320 extern int i2c_del_driver(struct i2c_driver *);
322 extern int i2c_attach_client(struct i2c_client *);
323 extern int i2c_detach_client(struct i2c_client *);
325 /* New function: This is to get an i2c_client-struct for controlling the
326 client either by using i2c_control-function or having the
327 client-module export functions that can be used with the i2c_client
329 extern struct i2c_client *i2c_get_client(int driver_id, int adapter_id,
330 struct i2c_client *prev);
332 /* Should be used with new function
333 extern struct i2c_client *i2c_get_client(int,int,struct i2c_client *);
334 to make sure that client-struct is valid and that it is okay to access
336 returns -EACCES if client doesn't allow use (default)
337 returns -EBUSY if client doesn't allow multiple use (default) and
339 extern int i2c_use_client(struct i2c_client *);
340 extern int i2c_release_client(struct i2c_client *);
342 /* call the i2c_client->command() of all attached clients with
343 * the given arguments */
344 extern void i2c_clients_command(struct i2c_adapter *adap,
345 unsigned int cmd, void *arg);
347 /* returns -EBUSY if address has been taken, 0 if not. Note that the only
348 other place at which this is called is within i2c_attach_client; so
349 you can cheat by simply not registering. Not recommended, of course! */
350 extern int i2c_check_addr (struct i2c_adapter *adapter, int addr);
352 /* Detect function. It iterates over all possible addresses itself.
353 * It will only call found_proc if some client is connected at the
354 * specific address (unless a 'force' matched);
356 extern int i2c_probe(struct i2c_adapter *adapter,
357 struct i2c_client_address_data *address_data,
358 int (*found_proc) (struct i2c_adapter *, int, int));
360 /* An ioctl like call to set div. parameters of the adapter.
362 extern int i2c_control(struct i2c_client *,unsigned int, unsigned long);
364 /* This call returns a unique low identifier for each registered adapter,
365 * or -1 if the adapter was not registered.
367 extern int i2c_adapter_id(struct i2c_adapter *adap);
368 extern struct i2c_adapter* i2c_get_adapter(int id);
369 extern void i2c_put_adapter(struct i2c_adapter *adap);
372 /* Return the functionality mask */
373 static inline u32 i2c_get_functionality(struct i2c_adapter *adap)
375 return adap->algo->functionality(adap);
378 /* Return 1 if adapter supports everything we need, 0 if not. */
379 static inline int i2c_check_functionality(struct i2c_adapter *adap, u32 func)
381 return (func & i2c_get_functionality(adap)) == func;
385 * I2C Message - used for pure i2c transaction, also from /dev interface
388 __u16 addr; /* slave address */
390 #define I2C_M_TEN 0x10 /* we have a ten bit chip address */
391 #define I2C_M_RD 0x01
392 #define I2C_M_NOSTART 0x4000
393 #define I2C_M_REV_DIR_ADDR 0x2000
394 #define I2C_M_IGNORE_NAK 0x1000
395 #define I2C_M_NO_RD_ACK 0x0800
396 __u16 len; /* msg length */
397 __u8 *buf; /* pointer to msg data */
400 /* To determine what functionality is present */
402 #define I2C_FUNC_I2C 0x00000001
403 #define I2C_FUNC_10BIT_ADDR 0x00000002
404 #define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
405 #define I2C_FUNC_SMBUS_HWPEC_CALC 0x00000008 /* SMBus 2.0 */
406 #define I2C_FUNC_SMBUS_READ_WORD_DATA_PEC 0x00000800 /* SMBus 2.0 */
407 #define I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC 0x00001000 /* SMBus 2.0 */
408 #define I2C_FUNC_SMBUS_PROC_CALL_PEC 0x00002000 /* SMBus 2.0 */
409 #define I2C_FUNC_SMBUS_BLOCK_PROC_CALL_PEC 0x00004000 /* SMBus 2.0 */
410 #define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */
411 #define I2C_FUNC_SMBUS_QUICK 0x00010000
412 #define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
413 #define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
414 #define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
415 #define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
416 #define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
417 #define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
418 #define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
419 #define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
420 #define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
421 #define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */
422 #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */
423 #define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 0x10000000 /* I2C-like block xfer */
424 #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */
425 #define I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC 0x40000000 /* SMBus 2.0 */
426 #define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC 0x80000000 /* SMBus 2.0 */
428 #define I2C_FUNC_SMBUS_BYTE (I2C_FUNC_SMBUS_READ_BYTE | \
429 I2C_FUNC_SMBUS_WRITE_BYTE)
430 #define I2C_FUNC_SMBUS_BYTE_DATA (I2C_FUNC_SMBUS_READ_BYTE_DATA | \
431 I2C_FUNC_SMBUS_WRITE_BYTE_DATA)
432 #define I2C_FUNC_SMBUS_WORD_DATA (I2C_FUNC_SMBUS_READ_WORD_DATA | \
433 I2C_FUNC_SMBUS_WRITE_WORD_DATA)
434 #define I2C_FUNC_SMBUS_BLOCK_DATA (I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
435 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA)
436 #define I2C_FUNC_SMBUS_I2C_BLOCK (I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
437 I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)
438 #define I2C_FUNC_SMBUS_I2C_BLOCK_2 (I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 | \
439 I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2)
440 #define I2C_FUNC_SMBUS_BLOCK_DATA_PEC (I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC | \
441 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC)
442 #define I2C_FUNC_SMBUS_WORD_DATA_PEC (I2C_FUNC_SMBUS_READ_WORD_DATA_PEC | \
443 I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC)
445 #define I2C_FUNC_SMBUS_READ_BYTE_PEC I2C_FUNC_SMBUS_READ_BYTE_DATA
446 #define I2C_FUNC_SMBUS_WRITE_BYTE_PEC I2C_FUNC_SMBUS_WRITE_BYTE_DATA
447 #define I2C_FUNC_SMBUS_READ_BYTE_DATA_PEC I2C_FUNC_SMBUS_READ_WORD_DATA
448 #define I2C_FUNC_SMBUS_WRITE_BYTE_DATA_PEC I2C_FUNC_SMBUS_WRITE_WORD_DATA
449 #define I2C_FUNC_SMBUS_BYTE_PEC I2C_FUNC_SMBUS_BYTE_DATA
450 #define I2C_FUNC_SMBUS_BYTE_DATA_PEC I2C_FUNC_SMBUS_WORD_DATA
452 #define I2C_FUNC_SMBUS_EMUL (I2C_FUNC_SMBUS_QUICK | \
453 I2C_FUNC_SMBUS_BYTE | \
454 I2C_FUNC_SMBUS_BYTE_DATA | \
455 I2C_FUNC_SMBUS_WORD_DATA | \
456 I2C_FUNC_SMBUS_PROC_CALL | \
457 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
458 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC | \
459 I2C_FUNC_SMBUS_I2C_BLOCK)
462 * Data for SMBus Messages
464 #define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */
465 #define I2C_SMBUS_I2C_BLOCK_MAX 32 /* Not specified but we use same structure */
466 union i2c_smbus_data {
469 __u8 block[I2C_SMBUS_BLOCK_MAX + 3]; /* block[0] is used for length */
470 /* one more for read length in block process call */
471 /* and one more for PEC */
474 /* smbus_access read or write markers */
475 #define I2C_SMBUS_READ 1
476 #define I2C_SMBUS_WRITE 0
478 /* SMBus transaction types (size parameter in the above functions)
479 Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
480 #define I2C_SMBUS_QUICK 0
481 #define I2C_SMBUS_BYTE 1
482 #define I2C_SMBUS_BYTE_DATA 2
483 #define I2C_SMBUS_WORD_DATA 3
484 #define I2C_SMBUS_PROC_CALL 4
485 #define I2C_SMBUS_BLOCK_DATA 5
486 #define I2C_SMBUS_I2C_BLOCK_DATA 6
487 #define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */
488 #define I2C_SMBUS_BLOCK_DATA_PEC 8 /* SMBus 2.0 */
489 #define I2C_SMBUS_PROC_CALL_PEC 9 /* SMBus 2.0 */
490 #define I2C_SMBUS_BLOCK_PROC_CALL_PEC 10 /* SMBus 2.0 */
491 #define I2C_SMBUS_WORD_DATA_PEC 11 /* SMBus 2.0 */
494 /* ----- commands for the ioctl like i2c_command call:
495 * note that additional calls are defined in the algorithm and hw
496 * dependent layers - these can be listed here, or see the
497 * corresponding header files.
499 /* -> bit-adapter specific ioctls */
500 #define I2C_RETRIES 0x0701 /* number of times a device address */
501 /* should be polled when not */
503 #define I2C_TIMEOUT 0x0702 /* set timeout - call with int */
506 /* this is for i2c-dev.c */
507 #define I2C_SLAVE 0x0703 /* Change slave address */
508 /* Attn.: Slave address is 7 or 10 bits */
509 #define I2C_SLAVE_FORCE 0x0706 /* Change slave address */
510 /* Attn.: Slave address is 7 or 10 bits */
511 /* This changes the address, even if it */
512 /* is already taken! */
513 #define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */
515 #define I2C_FUNCS 0x0705 /* Get the adapter functionality */
516 #define I2C_RDWR 0x0707 /* Combined R/W transfer (one stop only)*/
517 #define I2C_PEC 0x0708 /* != 0 for SMBus PEC */
519 #define I2C_ACK_TEST 0x0710 /* See if a slave is at a specific address */
522 #define I2C_SMBUS 0x0720 /* SMBus-level access */
524 /* ... algo-bit.c recognizes */
525 #define I2C_UDELAY 0x0705 /* set delay in microsecs between each */
526 /* written byte (except address) */
527 #define I2C_MDELAY 0x0706 /* millisec delay between written bytes */
529 /* ----- I2C-DEV: char device interface stuff ------------------------- */
531 #define I2C_MAJOR 89 /* Device major number */
533 /* These defines are used for probing i2c client addresses */
534 /* The length of the option lists */
535 #define I2C_CLIENT_MAX_OPTS 48
537 /* Default fill of many variables */
538 #define I2C_CLIENT_DEFAULTS {I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
539 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
540 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
541 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
542 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
543 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
544 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
545 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}
555 /* I2C_CLIENT_MODULE_PARM creates a module parameter, and puts it in the
558 #define I2C_CLIENT_MODULE_PARM(var,desc) \
559 static unsigned short var[I2C_CLIENT_MAX_OPTS] = I2C_CLIENT_DEFAULTS; \
560 static unsigned int var##_num; \
561 module_param_array(var, short, &var##_num, 0); \
562 MODULE_PARM_DESC(var,desc)
564 /* This is the one you want to use in your own modules */
565 #define I2C_CLIENT_INSMOD \
566 I2C_CLIENT_MODULE_PARM(probe, \
567 "List of adapter,address pairs to scan additionally"); \
568 I2C_CLIENT_MODULE_PARM(ignore, \
569 "List of adapter,address pairs not to scan"); \
570 I2C_CLIENT_MODULE_PARM(force, \
571 "List of adapter,address pairs to boldly assume " \
573 static struct i2c_client_address_data addr_data = { \
574 .normal_i2c = normal_i2c, \
580 /* Detect whether we are on the isa bus. If this returns true, all i2c
582 #define i2c_is_isa_client(clientptr) \
583 ((clientptr)->adapter->algo->id == I2C_ALGO_ISA)
584 #define i2c_is_isa_adapter(adapptr) \
585 ((adapptr)->algo->id == I2C_ALGO_ISA)
587 #endif /* _LINUX_I2C_H */