summaryrefslogtreecommitdiffstats
path: root/include/linux/i2c.h
blob: 3d49a305bf8881767669a0ac091fa36175e0ca70 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
/* ------------------------------------------------------------------------- */
/* 									     */
/* i2c.h - definitions for the i2c-bus interface			     */
/* 									     */
/* ------------------------------------------------------------------------- */
/*   Copyright (C) 1995-2000 Simon G. Vogl

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.		     */
/* ------------------------------------------------------------------------- */

/* With some changes from Ky�sti M�lkki <kmalkki@cc.hut.fi> and
   Frodo Looijaard <frodol@dds.nl> */

/* $Id: i2c.h,v 1.68 2003/01/21 08:08:16 kmalkki Exp $ */

#ifndef _LINUX_I2C_H
#define _LINUX_I2C_H

#include <linux/module.h>
#include <linux/types.h>
#include <linux/i2c-id.h>
#include <linux/device.h>	/* for struct device */
#include <asm/semaphore.h>

/* --- For i2c-isa ---------------------------------------------------- */

extern void i2c_adapter_dev_release(struct device *dev);
extern struct device_driver i2c_adapter_driver;
extern struct class i2c_adapter_class;
extern struct bus_type i2c_bus_type;

/* --- General options ------------------------------------------------	*/

struct i2c_msg;
struct i2c_algorithm;
struct i2c_adapter;
struct i2c_client;
struct i2c_driver;
union i2c_smbus_data;

/*
 * The master routines are the ones normally used to transmit data to devices
 * 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.
 */
extern int i2c_master_send(struct i2c_client *,const char* ,int);
extern int i2c_master_recv(struct i2c_client *,char* ,int);

/* Transfer num messages.
 */
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,
   and probably just as fast. 
   Note that we use i2c_adapter here, because you do not need a specific
   smbus adapter to call this function. */
extern s32 i2c_smbus_xfer (struct i2c_adapter * adapter, u16 addr, 
                           unsigned short flags,
                           char read_write, u8 command, int size,
                           union i2c_smbus_data * data);

/* Now follow the 'nice' access routines. These also document the calling
   conventions of smbus_access. */

extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value);
extern s32 i2c_smbus_read_byte(struct i2c_client * client);
extern s32 i2c_smbus_write_byte(struct i2c_client * client, u8 value);
extern s32 i2c_smbus_read_byte_data(struct i2c_client * client, u8 command);
extern s32 i2c_smbus_write_byte_data(struct i2c_client * client,
                                     u8 command, u8 value);
extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);
extern s32 i2c_smbus_write_word_data(struct i2c_client * client,
                                     u8 command, u16 value);
/* Returns the number of bytes transferred */
extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
				      u8 command, u8 length,
				      u8 *values);
extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,
					 u8 command, 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.
 */

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
	 * & seek for the presence of the chip(s) it supports. If found, it 
	 * registers the client(s) that are on the bus to the i2c admin. via
	 * i2c_attach_client.
	 */
	int (*attach_adapter)(struct i2c_adapter *);
	int (*detach_adapter)(struct i2c_adapter *);

	/* tells the driver that a client is about to be deleted & gives it 
	 * the chance to remove its private data. Also, if the client struct
	 * has been dynamically allocated by the driver in the function above,
	 * it must be freed here.
	 */
	int (*detach_client)(struct i2c_client *);
	
	/* a ioctl like command that can be used to perform specific functions
	 * with the device.
	 */
	int (*command)(struct i2c_client *client,unsigned int cmd, void *arg);

	struct device_driver driver;
	struct list_head list;
};
#define to_i2c_driver(d) container_of(d, struct i2c_driver, driver)

#define I2C_NAME_SIZE	50

/*
 * i2c_client identifies a single device (i.e. chip) that is connected to an 
 * i2c bus. The behaviour is defined by the routines of the driver. This
 * function is mainly used for lookup & other admin. functions.
 */
struct i2c_client {
	unsigned int flags;		/* div., see below		*/
	unsigned short addr;		/* chip address - NOTE: 7bit 	*/
					/* addresses are stored in the	*/
					/* _LOWER_ 7 bits		*/
	struct i2c_adapter *adapter;	/* the adapter we sit on	*/
	struct i2c_driver *driver;	/* and our access routines	*/
	int usage_count;		/* How many accesses currently  */
					/* to the client		*/
	struct device dev;		/* the device structure		*/
	struct list_head list;
	char name[I2C_NAME_SIZE];
	struct completion released;
};
#define to_i2c_client(d) container_of(d, struct i2c_client, dev)

static inline struct i2c_client *kobj_to_i2c_client(struct kobject *kobj)
{
	return to_i2c_client(container_of(kobj, struct device, kobj));
}

static inline void *i2c_get_clientdata (struct i2c_client *dev)
{
	return dev_get_drvdata (&dev->dev);
}

static inline void i2c_set_clientdata (struct i2c_client *dev, void *data)
{
	dev_set_drvdata (&dev->dev, data);
}

/*
 * The following structs are for those who like to implement new bus drivers:
 * i2c_algorithm is the interface to a class of hardware solutions which can
 * be addressed using the same bus algorithms - i.e. bit-banging or the PCF8584
 * to name two of the most common.
 */
struct i2c_algorithm {
	/* If an adapter algorithm can't do I2C-level access, set master_xfer
	   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 */
	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);

	/* To determine what the adapter supports */
	u32 (*functionality) (struct i2c_adapter *);
};

/*
 * i2c_adapter is the structure used to identify a physical i2c bus along
 * with the access algorithms necessary to access it.
 */
struct i2c_adapter {
	struct module *owner;
	unsigned int id;
	unsigned int class;
	struct i2c_algorithm *algo;/* the algorithm to access the bus	*/
	void *algo_data;

	/* --- administration stuff. */
	int (*client_register)(struct i2c_client *);
	int (*client_unregister)(struct i2c_client *);

	/* data fields that are valid for all devices	*/
	struct semaphore bus_lock;
	struct semaphore clist_lock;

	int timeout;
	int retries;
	struct device dev;		/* the adapter device */
	struct class_device class_dev;	/* the class device */

	int nr;
	struct list_head clients;
	struct list_head list;
	char name[I2C_NAME_SIZE];
	struct completion dev_released;
	struct completion class_dev_released;
};
#define dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev)
#define class_dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, class_dev)

static inline void *i2c_get_adapdata (struct i2c_adapter *dev)
{
	return dev_get_drvdata (&dev->dev);
}

static inline void i2c_set_adapdata (struct i2c_adapter *dev, void *data)
{
	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 */

/* i2c adapter classes (bitmask) */
#define I2C_CLASS_HWMON		(1<<0)	/* lm_sensors, ... */
#define I2C_CLASS_TV_ANALOG	(1<<1)	/* bttv + friends */
#define I2C_CLASS_TV_DIGITAL	(1<<2)	/* dvb cards */
#define I2C_CLASS_DDC		(1<<3)	/* i2c-matroxfb ? */
#define I2C_CLASS_CAM_ANALOG	(1<<4)	/* camera with analog CCD */
#define I2C_CLASS_CAM_DIGITAL	(1<<5)	/* most webcams */
#define I2C_CLASS_SOUND		(1<<6)	/* sound devices */
#define I2C_CLASS_ALL		(UINT_MAX) /* all of the above */

/* 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 {
	unsigned short *normal_i2c;
	unsigned short *probe;
	unsigned short *ignore;
	unsigned short **forces;
};

/* Internal numbers to terminate lists */
#define I2C_CLIENT_END		0xfffeU

/* The numbers to use to set I2C bus address */
#define ANY_I2C_BUS		0xffff
#define ANY_I2C_ISA_BUS		9191


/* ----- functions exported by i2c.o */

/* administration...
 */
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_del_driver(struct i2c_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 */
extern int i2c_use_client(struct i2c_client *);
extern int i2c_release_client(struct i2c_client *);

/* call the i2c_client->command() of all attached clients with
 * the given arguments */
extern void i2c_clients_command(struct i2c_adapter *adap,
				unsigned int cmd, void *arg);

/* returns -EBUSY if address has been taken, 0 if not. Note that the only
   other place at which this is called is within i2c_attach_client; so
   you can cheat by simply not registering. Not recommended, of course! */
extern int i2c_check_addr (struct i2c_adapter *adapter, int addr);

/* Detect function. It iterates over all possible addresses itself.
 * It will only call found_proc if some client is connected at the
 * specific address (unless a 'force' matched);
 */
extern int i2c_probe(struct i2c_adapter *adapter, 
		struct i2c_client_address_data *address_data,
		int (*found_proc) (struct i2c_adapter *, int, int));

/* An ioctl like call to set div. parameters of the adapter.
 */
extern int i2c_control(struct i2c_client *,unsigned int, unsigned long);

extern struct i2c_adapter* i2c_get_adapter(int id);
extern void i2c_put_adapter(struct i2c_adapter *adap);


/* Return the functionality mask */
static inline u32 i2c_get_functionality(struct i2c_adapter *adap)
{
	return adap->algo->functionality(adap);
}

/* Return 1 if adapter supports everything we need, 0 if not. */
static inline int i2c_check_functionality(struct i2c_adapter *adap, u32 func)
{
	return (func & i2c_get_functionality(adap)) == func;
}

/* Return id number for a specific adapter */
static inline int i2c_adapter_id(struct i2c_adapter *adap)
{
	return adap->nr;
}

/*
 * I2C Message - used for pure i2c transaction, also from /dev interface
 */
struct i2c_msg {
	__u16 addr;	/* slave address			*/
 	__u16 flags;		
#define I2C_M_TEN	0x10	/* we have a ten bit chip address	*/
#define I2C_M_RD	0x01
#define I2C_M_NOSTART	0x4000
#define I2C_M_REV_DIR_ADDR	0x2000
#define I2C_M_IGNORE_NAK	0x1000
#define I2C_M_NO_RD_ACK		0x0800
 	__u16 len;		/* msg length				*/
 	__u8 *buf;		/* pointer to msg data			*/
};

/* To determine what functionality is present */

#define I2C_FUNC_I2C			0x00000001
#define I2C_FUNC_10BIT_ADDR		0x00000002
#define I2C_FUNC_PROTOCOL_MANGLING	0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
#define I2C_FUNC_SMBUS_HWPEC_CALC	0x00000008 /* SMBus 2.0 */
#define I2C_FUNC_SMBUS_READ_WORD_DATA_PEC  0x00000800 /* SMBus 2.0 */ 
#define I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC 0x00001000 /* SMBus 2.0 */ 
#define I2C_FUNC_SMBUS_PROC_CALL_PEC	0x00002000 /* SMBus 2.0 */
#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL_PEC 0x00004000 /* SMBus 2.0 */
#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL	0x00008000 /* SMBus 2.0 */
#define I2C_FUNC_SMBUS_QUICK		0x00010000 
#define I2C_FUNC_SMBUS_READ_BYTE	0x00020000 
#define I2C_FUNC_SMBUS_WRITE_BYTE	0x00040000 
#define I2C_FUNC_SMBUS_READ_BYTE_DATA	0x00080000 
#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA	0x00100000 
#define I2C_FUNC_SMBUS_READ_WORD_DATA	0x00200000 
#define I2C_FUNC_SMBUS_WRITE_WORD_DATA	0x00400000 
#define I2C_FUNC_SMBUS_PROC_CALL	0x00800000 
#define I2C_FUNC_SMBUS_READ_BLOCK_DATA	0x01000000 
#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000 
#define I2C_FUNC_SMBUS_READ_I2C_BLOCK	0x04000000 /* I2C-like block xfer  */
#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK	0x08000000 /* w/ 1-byte reg. addr. */
#define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2	 0x10000000 /* I2C-like block xfer  */
#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */
#define I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC  0x40000000 /* SMBus 2.0 */
#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC 0x80000000 /* SMBus 2.0 */

#define I2C_FUNC_SMBUS_BYTE (I2C_FUNC_SMBUS_READ_BYTE | \
                             I2C_FUNC_SMBUS_WRITE_BYTE)
#define I2C_FUNC_SMBUS_BYTE_DATA (I2C_FUNC_SMBUS_READ_BYTE_DATA | \
                                  I2C_FUNC_SMBUS_WRITE_BYTE_DATA)
#define I2C_FUNC_SMBUS_WORD_DATA (I2C_FUNC_SMBUS_READ_WORD_DATA | \
                                  I2C_FUNC_SMBUS_WRITE_WORD_DATA)
#define I2C_FUNC_SMBUS_BLOCK_DATA (I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
                                   I2C_FUNC_SMBUS_WRITE_BLOCK_DATA)
#define I2C_FUNC_SMBUS_I2C_BLOCK (I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
                                  I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)
#define I2C_FUNC_SMBUS_I2C_BLOCK_2 (I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 | \
                                    I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2)
#define I2C_FUNC_SMBUS_BLOCK_DATA_PEC (I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC | \
                                       I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC)
#define I2C_FUNC_SMBUS_WORD_DATA_PEC  (I2C_FUNC_SMBUS_READ_WORD_DATA_PEC | \
                                       I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC)

#define I2C_FUNC_SMBUS_READ_BYTE_PEC		I2C_FUNC_SMBUS_READ_BYTE_DATA
#define I2C_FUNC_SMBUS_WRITE_BYTE_PEC		I2C_FUNC_SMBUS_WRITE_BYTE_DATA
#define I2C_FUNC_SMBUS_READ_BYTE_DATA_PEC	I2C_FUNC_SMBUS_READ_WORD_DATA
#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA_PEC	I2C_FUNC_SMBUS_WRITE_WORD_DATA
#define I2C_FUNC_SMBUS_BYTE_PEC			I2C_FUNC_SMBUS_BYTE_DATA
#define I2C_FUNC_SMBUS_BYTE_DATA_PEC		I2C_FUNC_SMBUS_WORD_DATA

#define I2C_FUNC_SMBUS_EMUL (I2C_FUNC_SMBUS_QUICK | \
                             I2C_FUNC_SMBUS_BYTE | \
                             I2C_FUNC_SMBUS_BYTE_DATA | \
                             I2C_FUNC_SMBUS_WORD_DATA | \
                             I2C_FUNC_SMBUS_PROC_CALL | \
                             I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
                             I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC | \
                             I2C_FUNC_SMBUS_I2C_BLOCK)

/* 
 * Data for SMBus Messages 
 */
#define I2C_SMBUS_BLOCK_MAX	32	/* As specified in SMBus standard */	
#define I2C_SMBUS_I2C_BLOCK_MAX	32	/* Not specified but we use same structure */
union i2c_smbus_data {
	__u8 byte;
	__u16 word;
	__u8 block[I2C_SMBUS_BLOCK_MAX + 3]; /* block[0] is used for length */
                          /* one more for read length in block process call */
	                                            /* and one more for PEC */
};

/* smbus_access read or write markers */
#define I2C_SMBUS_READ	1
#define I2C_SMBUS_WRITE	0

/* SMBus transaction types (size parameter in the above functions) 
   Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
#define I2C_SMBUS_QUICK		    0
#define I2C_SMBUS_BYTE		    1
#define I2C_SMBUS_BYTE_DATA	    2 
#define I2C_SMBUS_WORD_DATA	    3
#define I2C_SMBUS_PROC_CALL	    4
#define I2C_SMBUS_BLOCK_DATA	    5
#define I2C_SMBUS_I2C_BLOCK_DATA    6
#define I2C_SMBUS_BLOCK_PROC_CALL   7		/* SMBus 2.0 */
#define I2C_SMBUS_BLOCK_DATA_PEC    8		/* SMBus 2.0 */
#define I2C_SMBUS_PROC_CALL_PEC     9		/* SMBus 2.0 */
#define I2C_SMBUS_BLOCK_PROC_CALL_PEC  10	/* SMBus 2.0 */
#define I2C_SMBUS_WORD_DATA_PEC	   11		/* SMBus 2.0 */


/* ----- commands for the ioctl like i2c_command call:
 * note that additional calls are defined in the algorithm and hw 
 *	dependent layers - these can be listed here, or see the 
 *	corresponding header files.
 */
				/* -> bit-adapter specific ioctls	*/
#define I2C_RETRIES	0x0701	/* number of times a device address      */
				/* should be polled when not            */
                                /* acknowledging 			*/
#define I2C_TIMEOUT	0x0702	/* set timeout - call with int 		*/


/* this is for i2c-dev.c	*/
#define I2C_SLAVE	0x0703	/* Change slave address			*/
				/* Attn.: Slave address is 7 or 10 bits */
#define I2C_SLAVE_FORCE	0x0706	/* Change slave address			*/
				/* Attn.: Slave address is 7 or 10 bits */
				/* This changes the address, even if it */
				/* is already taken!			*/
#define I2C_TENBIT	0x0704	/* 0 for 7 bit addrs, != 0 for 10 bit	*/

#define I2C_FUNCS	0x0705	/* Get the adapter functionality */
#define I2C_RDWR	0x0707	/* Combined R/W transfer (one stop only)*/
#define I2C_PEC		0x0708	/* != 0 for SMBus PEC                   */

#define I2C_SMBUS	0x0720	/* SMBus-level access */

/* ... algo-bit.c recognizes */
#define I2C_UDELAY	0x0705	/* set delay in microsecs between each	*/
				/* written byte (except address)	*/
#define I2C_MDELAY	0x0706	/* millisec delay between written bytes */

/* ----- I2C-DEV: char device interface stuff ------------------------- */

#define I2C_MAJOR	89		/* Device major number		*/

/* 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 struct i2c_client_address_data addr_data = {			\
	.normal_i2c	= normal_i2c,					\
	.probe		= probe,					\
	.ignore		= ignore,					\
	.forces		= forces,					\
}

/* 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, \
                      "List of adapter,address pairs to boldly assume " \
                      "to be present"); \
	static unsigned short *forces[] = {				\
			force,						\
			NULL						\
		};							\
I2C_CLIENT_INSMOD_COMMON

#define I2C_CLIENT_INSMOD_1(chip1)					\
enum chips { any_chip, chip1 };						\
I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to "	\
		       "boldly assume to be present");			\
I2C_CLIENT_MODULE_PARM_FORCE(chip1);					\
static unsigned short *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, "List of adapter,address pairs to "	\
		       "boldly assume to be present");			\
I2C_CLIENT_MODULE_PARM_FORCE(chip1);					\
I2C_CLIENT_MODULE_PARM_FORCE(chip2);					\
static unsigned short *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, "List of adapter,address pairs to "	\
		       "boldly assume to be present");			\
I2C_CLIENT_MODULE_PARM_FORCE(chip1);					\
I2C_CLIENT_MODULE_PARM_FORCE(chip2);					\
I2C_CLIENT_MODULE_PARM_FORCE(chip3);					\
static unsigned short *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, "List of adapter,address pairs to "	\
		       "boldly assume to be present");			\
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 unsigned short *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, "List of adapter,address pairs to "	\
		       "boldly assume to be present");			\
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 unsigned short *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, "List of adapter,address pairs to "	\
		       "boldly assume to be present");			\
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 unsigned short *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, "List of adapter,address pairs to "	\
		       "boldly assume to be present");			\
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 unsigned short *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, "List of adapter,address pairs to "	\
		       "boldly assume to be present");			\
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 unsigned short *forces[] = { force, force_##chip1,		\
				    force_##chip2, force_##chip3,	\
				    force_##chip4, force_##chip5,	\
				    force_##chip6, force_##chip7,	\
				    force_##chip8, NULL };		\
I2C_CLIENT_INSMOD_COMMON

#endif /* _LINUX_I2C_H */
OpenPOWER on IntegriCloud