Context Navigation

i2c.h @ 3621

Revision 3621, 21.5 KB (checked in by mds, 11 years ago)
update rev to 2.6.3, 20020313
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`

Line
1	/* ------------------------------------------------------------------------- */
2	/* */
3	/* i2c.h - definitions for the i2c-bus interface */
4	/* */
5	/* ------------------------------------------------------------------------- */
6	/* Copyright (C) 1995-2000 Simon G. Vogl
7
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.
12
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.
17
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	/* ------------------------------------------------------------------------- */
22
23	/* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and
24	Frodo Looijaard <frodol@dds.nl> */
25
26	/* $Id$ */
27
28	#ifndef I2C_H
29	#define I2C_H
30
31	#define I2C_DATE "20020313"
32	#define I2C_VERSION "2.6.3"
33
34	#include "i2c-id.h" /* id values of adapters et. al. */
35	#include <linux/types.h>
36
37
38	struct i2c_msg;
39
40
41	#ifdef __KERNEL__
42
43	/* --- Includes and compatibility declarations ------------------------ */
44
45	#include <linux/version.h>
46	#ifndef KERNEL_VERSION
47	#define KERNEL_VERSION(a,b,c) (((a) << 16) \| ((b) << 8) \| (c))
48	#endif
49
50	#include <asm/page.h> /* for 2.2.xx */
51	#if LINUX_VERSION_CODE < KERNEL_VERSION(2,0,25)
52	#include <linux/sched.h>
53	#else
54	#include <asm/semaphore.h>
55	#endif
56	#include <linux/config.h>
57
58	/* --- General options ------------------------------------------------ */
59
60	#define I2C_ALGO_MAX 4 /* control memory consumption */
61	#define I2C_ADAP_MAX 16
62	#define I2C_DRIVER_MAX 16
63	#define I2C_CLIENT_MAX 32
64	#define I2C_DUMMY_MAX 4
65
66	struct i2c_algorithm;
67	struct i2c_adapter;
68	struct i2c_client;
69	struct i2c_driver;
70	struct i2c_client_address_data;
71	union i2c_smbus_data;
72
73
74	/*
75	* The master routines are the ones normally used to transmit data to devices
76	* on a bus (or read from them). Apart from two basic transfer functions to
77	* transmit one message at a time, a more complex version can be used to
78	* transmit an arbitrary number of messages without interruption.
79	*/
80	extern int i2c_master_send(struct i2c_client ,const char ,int);
81	extern int i2c_master_recv(struct i2c_client ,char ,int);
82
83	/* Transfer num messages.
84	*/
85	extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg msg[],int num);
86
87	/*
88	* Some adapter types (i.e. PCF 8584 based ones) may support slave behaviuor.
89	* This is not tested/implemented yet and will change in the future.
90	*/
91	extern int i2c_slave_send(struct i2c_client ,char,int);
92	extern int i2c_slave_recv(struct i2c_client ,char,int);
93
94
95
96	/* This is the very generalized SMBus access routine. You probably do not
97	want to use this, though; one of the functions below may be much easier,
98	and probably just as fast.
99	Note that we use i2c_adapter here, because you do not need a specific
100	smbus adapter to call this function. */
101	extern s32 i2c_smbus_xfer (struct i2c_adapter * adapter, u16 addr,
102	unsigned short flags,
103	char read_write, u8 command, int size,
104	union i2c_smbus_data * data);
105
106	/* Now follow the 'nice' access routines. These also document the calling
107	conventions of smbus_access. */
108
109	extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value);
110	extern s32 i2c_smbus_read_byte(struct i2c_client * client);
111	extern s32 i2c_smbus_write_byte(struct i2c_client * client, u8 value);
112	extern s32 i2c_smbus_read_byte_data(struct i2c_client * client, u8 command);
113	extern s32 i2c_smbus_write_byte_data(struct i2c_client * client,
114	u8 command, u8 value);
115	extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);
116	extern s32 i2c_smbus_write_word_data(struct i2c_client * client,
117	u8 command, u16 value);
118	extern s32 i2c_smbus_process_call(struct i2c_client * client,
119	u8 command, u16 value);
120	/* Returns the number of read bytes */
121	extern s32 i2c_smbus_read_block_data(struct i2c_client * client,
122	u8 command, u8 *values);
123	extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
124	u8 command, u8 length,
125	u8 *values);
126	extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,
127	u8 command, u8 *values);
128	extern s32 i2c_smbus_write_i2c_block_data(struct i2c_client * client,
129	u8 command, u8 length,
130	u8 *values);
131
132
133	/*
134	* A driver is capable of handling one or more physical devices present on
135	* I2C adapters. This information is used to inform the driver of adapter
136	* events.
137	*/
138
139	struct i2c_driver {
140	char name[32];
141	int id;
142	unsigned int flags; /* div., see below */
143
144	/* Notifies the driver that a new bus has appeared. This routine
145	* can be used by the driver to test if the bus meets its conditions
146	* & seek for the presence of the chip(s) it supports. If found, it
147	* registers the client(s) that are on the bus to the i2c admin. via
148	* i2c_attach_client.
149	*/
150	int (attach_adapter)(struct i2c_adapter );
151
152	/* tells the driver that a client is about to be deleted & gives it
153	* the chance to remove its private data. Also, if the client struct
154	* has been dynamically allocated by the driver in the function above,
155	* it must be freed here.
156	*/
157	int (detach_client)(struct i2c_client );
158
159	/* a ioctl like command that can be used to perform specific functions
160	* with the device.
161	*/
162	int (command)(struct i2c_client client,unsigned int cmd, void *arg);
163
164	/* These two are mainly used for bookkeeping & dynamic unloading of
165	* kernel modules. inc_use tells the driver that a client is being
166	* used by another module & that it should increase its ref. counter.
167	* dec_use is the inverse operation.
168	* NB: Make sure you have no circular dependencies, or else you get a
169	* deadlock when trying to unload the modules.
170	* You should use the i2c_{inc,dec}_use_client functions instead of
171	* calling this function directly.
172	*/
173	void (inc_use)(struct i2c_client client);
174	void (dec_use)(struct i2c_client client);
175	};
176
177	/*
178	* i2c_client identifies a single device (i.e. chip) that is connected to an
179	* i2c bus. The behaviour is defined by the routines of the driver. This
180	* function is mainly used for lookup & other admin. functions.
181	*/
182	struct i2c_client {
183	char name[32];
184	int id;
185	unsigned int flags; /* div., see below */
186	unsigned int addr; /* chip address - NOTE: 7bit */
187	/* addresses are stored in the */
188	/* _LOWER_ 7 bits of this char */
189	/* addr: unsigned int to make lm_sensors i2c-isa adapter work
190	more cleanly. It does not take any more memory space, due to
191	alignment considerations */
192	struct i2c_adapter adapter; / the adapter we sit on */
193	struct i2c_driver driver; / and our access routines */
194	void data; / for the clients */
195	int usage_count; /* How many accesses currently */
196	/* to the client */
197	};
198
199
200	/*
201	* The following structs are for those who like to implement new bus drivers:
202	* i2c_algorithm is the interface to a class of hardware solutions which can
203	* be addressed using the same bus algorithms - i.e. bit-banging or the PCF8584
204	* to name two of the most common.
205	*/
206	struct i2c_algorithm {
207	char name[32]; /* textual description */
208	unsigned int id;
209
210	/* If an adapter algorithm can't to I2C-level access, set master_xfer
211	to NULL. If an adapter algorithm can do SMBus access, set
212	smbus_xfer. If set to NULL, the SMBus protocol is simulated
213	using common I2C messages */
214	int (master_xfer)(struct i2c_adapter adap,struct i2c_msg msgs[],
215	int num);
216	int (smbus_xfer) (struct i2c_adapter adap, u16 addr,
217	unsigned short flags, char read_write,
218	u8 command, int size, union i2c_smbus_data * data);
219
220	/* --- these optional/future use for some adapter types.*/
221	int (slave_send)(struct i2c_adapter ,char*,int);
222	int (slave_recv)(struct i2c_adapter ,char*,int);
223
224	/* --- ioctl like call to set div. parameters. */
225	int (algo_control)(struct i2c_adapter , unsigned int, unsigned long);
226
227	/* To determine what the adapter supports */
228	u32 (functionality) (struct i2c_adapter );
229	};
230
231	#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,29)
232	struct proc_dir_entry;
233	#endif
234
235	/*
236	* i2c_adapter is the structure used to identify a physical i2c bus along
237	* with the access algorithms necessary to access it.
238	*/
239	struct i2c_adapter {
240	char name[32]; /* some useful name to identify the adapter */
241	unsigned int id;/* == is algo->id \| hwdep.struct->id, */
242	/* for registered values see below */
243	struct i2c_algorithm algo;/ the algorithm to access the bus */
244	void *algo_data;
245
246	/* --- These may be NULL, but should increase the module use count */
247	void (inc_use)(struct i2c_adapter );
248	void (dec_use)(struct i2c_adapter );
249
250	/* --- administration stuff. */
251	int (client_register)(struct i2c_client );
252	int (client_unregister)(struct i2c_client );
253
254	void data; / private data for the adapter */
255	/* some data fields that are used by all types */
256	/* these data fields are readonly to the public */
257	/* and can be set via the i2c_ioctl call */
258
259	/* data fields that are valid for all devices */
260	struct semaphore lock;
261	unsigned int flags;/* flags specifying div. data */
262
263	struct i2c_client *clients[I2C_CLIENT_MAX];
264	int client_count;
265
266	int timeout;
267	int retries;
268
269	#ifdef CONFIG_PROC_FS
270	/* No need to set this when you initialize the adapter */
271	int inode;
272	#if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,29)
273	struct proc_dir_entry *proc_entry;
274	#endif
275	#endif /* def CONFIG_PROC_FS */
276	};
277
278	/flags for the driver struct: /
279	#define I2C_DF_NOTIFY 0x01 /* notify on bus (de/a)ttaches */
280	#define I2C_DF_DUMMY 0x02 /* do not connect any clients */
281
282	/flags for the client struct: /
283	#define I2C_CLIENT_ALLOW_USE 0x01 /* Client allows access */
284	#define I2C_CLIENT_ALLOW_MULTIPLE_USE 0x02 /* Allow multiple access-locks */
285	/* on an i2c_client */
286
287	/* i2c_client_address_data is the struct for holding default client
288	* addresses for a driver and for the parameters supplied on the
289	* command line
290	*/
291	struct i2c_client_address_data {
292	unsigned short *normal_i2c;
293	unsigned short *normal_i2c_range;
294	unsigned short *probe;
295	unsigned short *probe_range;
296	unsigned short *ignore;
297	unsigned short *ignore_range;
298	unsigned short *force;
299	};
300
301	/* Internal numbers to terminate lists */
302	#define I2C_CLIENT_END 0xfffe
303
304	/* The numbers to use to set I2C bus address */
305	#define ANY_I2C_BUS 0xffff
306
307	/* The length of the option lists */
308	#define I2C_CLIENT_MAX_OPTS 48
309
310
311	/* ----- functions exported by i2c.o */
312
313	/* administration...
314	*/
315	extern int i2c_add_adapter(struct i2c_adapter *);
316	extern int i2c_del_adapter(struct i2c_adapter *);
317
318	extern int i2c_add_driver(struct i2c_driver *);
319	extern int i2c_del_driver(struct i2c_driver *);
320
321	extern int i2c_attach_client(struct i2c_client *);
322	extern int i2c_detach_client(struct i2c_client *);
323
324	/* Only call these if you grab a resource that makes unloading the
325	client and the adapter it is on completely impossible. Like when a
326	/proc directory is entered. */
327	extern void i2c_inc_use_client(struct i2c_client *);
328	extern void i2c_dec_use_client(struct i2c_client *);
329
330	/* New function: This is to get an i2c_client-struct for controlling the
331	client either by using i2c_control-function or having the
332	client-module export functions that can be used with the i2c_client
333	-struct. */
334	extern struct i2c_client *i2c_get_client(int driver_id, int adapter_id,
335	struct i2c_client *prev);
336
337	/* Should be used with new function
338	extern struct i2c_client i2c_get_client(int,int,struct i2c_client );
339	to make sure that client-struct is valid and that it is okay to access
340	the i2c-client.
341	returns -EACCES if client doesn't allow use (default)
342	returns -EBUSY if client doesn't allow multiple use (default) and
343	usage_count >0 */
344	extern int i2c_use_client(struct i2c_client *);
345	extern int i2c_release_client(struct i2c_client *);
346
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);
351
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);
355	*/
356	typedef int i2c_client_found_addr_proc (struct i2c_adapter *adapter,
357	int addr, unsigned short flags,int kind);
358
359	extern int i2c_probe(struct i2c_adapter *adapter,
360	struct i2c_client_address_data *address_data,
361	i2c_client_found_addr_proc *found_proc);
362
363	/* An ioctl like call to set div. parameters of the adapter.
364	*/
365	extern int i2c_control(struct i2c_client *,unsigned int, unsigned long);
366
367	/* This call returns a unique low identifier for each registered adapter,
368	* or -1 if the adapter was not registered.
369	*/
370	extern int i2c_adapter_id(struct i2c_adapter *adap);
371
372
373
374	/* Return the functionality mask */
375	extern u32 i2c_get_functionality (struct i2c_adapter *adap);
376
377	/* Return 1 if adapter supports everything we need, 0 if not. */
378	extern int i2c_check_functionality (struct i2c_adapter *adap, u32 func);
379
380	#endif /* __KERNEL__ */
381
382	/*
383	* I2C Message - used for pure i2c transaction, also from /dev interface
384	*/
385	struct i2c_msg {
386	__u16 addr; /* slave address */
387	unsigned short flags;
388	#define I2C_M_TEN 0x10 /* we have a ten bit chip address */
389	#define I2C_M_RD 0x01
390	#define I2C_M_NOSTART 0x4000
391	#define I2C_M_REV_DIR_ADDR 0x2000
392	short len; /* msg length */
393	char buf; / pointer to msg data */
394	};
395
396	/* To determine what functionality is present */
397
398	#define I2C_FUNC_I2C 0x00000001
399	#define I2C_FUNC_10BIT_ADDR 0x00000002
400	#define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART} */
401	#define I2C_FUNC_SMBUS_QUICK 0x00010000
402	#define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
403	#define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
404	#define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
405	#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
406	#define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
407	#define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
408	#define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
409	#define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
410	#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
411	#define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */
412	#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */
413	#define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 0x10000000 /* I2C-like block xfer */
414	#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */
415
416	#define I2C_FUNC_SMBUS_BYTE I2C_FUNC_SMBUS_READ_BYTE \| \
417	I2C_FUNC_SMBUS_WRITE_BYTE
418	#define I2C_FUNC_SMBUS_BYTE_DATA I2C_FUNC_SMBUS_READ_BYTE_DATA \| \
419	I2C_FUNC_SMBUS_WRITE_BYTE_DATA
420	#define I2C_FUNC_SMBUS_WORD_DATA I2C_FUNC_SMBUS_READ_WORD_DATA \| \
421	I2C_FUNC_SMBUS_WRITE_WORD_DATA
422	#define I2C_FUNC_SMBUS_BLOCK_DATA I2C_FUNC_SMBUS_READ_BLOCK_DATA \| \
423	I2C_FUNC_SMBUS_WRITE_BLOCK_DATA
424	#define I2C_FUNC_SMBUS_I2C_BLOCK I2C_FUNC_SMBUS_READ_I2C_BLOCK \| \
425	I2C_FUNC_SMBUS_WRITE_I2C_BLOCK
426	#define I2C_FUNC_SMBUS_I2C_BLOCK_2 I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 \| \
427	I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2
428
429	#define I2C_FUNC_SMBUS_EMUL I2C_FUNC_SMBUS_QUICK \| \
430	I2C_FUNC_SMBUS_BYTE \| \
431	I2C_FUNC_SMBUS_BYTE_DATA \| \
432	I2C_FUNC_SMBUS_WORD_DATA \| \
433	I2C_FUNC_SMBUS_PROC_CALL \| \
434	I2C_FUNC_SMBUS_WRITE_BLOCK_DATA \| \
435	I2C_FUNC_SMBUS_I2C_BLOCK \| \
436	I2C_FUNC_SMBUS_I2C_BLOCK_2
437
438	/*
439	* Data for SMBus Messages
440	*/
441	union i2c_smbus_data {
442	__u8 byte;
443	__u16 word;
444	__u8 block[33]; /* block[0] is used for length */
445	};
446
447	/* smbus_access read or write markers */
448	#define I2C_SMBUS_READ 1
449	#define I2C_SMBUS_WRITE 0
450
451	/* SMBus transaction types (size parameter in the above functions)
452	Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
453	#define I2C_SMBUS_QUICK 0
454	#define I2C_SMBUS_BYTE 1
455	#define I2C_SMBUS_BYTE_DATA 2
456	#define I2C_SMBUS_WORD_DATA 3
457	#define I2C_SMBUS_PROC_CALL 4
458	#define I2C_SMBUS_BLOCK_DATA 5
459	#define I2C_SMBUS_I2C_BLOCK_DATA 6
460
461
462	/* ----- commands for the ioctl like i2c_command call:
463	* note that additional calls are defined in the algorithm and hw
464	* dependent layers - these can be listed here, or see the
465	* corresponding header files.
466	*/
467	/* -> bit-adapter specific ioctls */
468	#define I2C_RETRIES 0x0701 /* number of times a device address */
469	/* should be polled when not */
470	/* acknowledging */
471	#define I2C_TIMEOUT 0x0702 /* set timeout - call with int */
472
473
474	/* this is for i2c-dev.c */
475	#define I2C_SLAVE 0x0703 /* Change slave address */
476	/* Attn.: Slave address is 7 or 10 bits */
477	#define I2C_SLAVE_FORCE 0x0706 /* Change slave address */
478	/* Attn.: Slave address is 7 or 10 bits */
479	/* This changes the address, even if it */
480	/* is already taken! */
481	#define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */
482
483	#define I2C_FUNCS 0x0705 /* Get the adapter functionality */
484	#define I2C_RDWR 0x0707 /* Combined R/W transfer (one stop only)*/
485	#if 0
486	#define I2C_ACK_TEST 0x0710 /* See if a slave is at a specific address */
487	#endif
488
489	#define I2C_SMBUS 0x0720 /* SMBus-level access */
490
491	/* ... algo-bit.c recognizes */
492	#define I2C_UDELAY 0x0705 /* set delay in microsecs between each */
493	/* written byte (except address) */
494	#define I2C_MDELAY 0x0706 /* millisec delay between written bytes */
495
496	/* ----- I2C-DEV: char device interface stuff ------------------------- */
497
498	#define I2C_MAJOR 89 /* Device major number */
499
500	#ifdef __KERNEL__
501
502	# ifndef NULL
503	# define NULL ( (void *) 0 )
504	# endif
505
506	# ifndef ENODEV
507	# include <asm/errno.h>
508	# endif
509
510	/* These defines are used for probing i2c client addresses */
511	/* Default fill of many variables */
512	#define I2C_CLIENT_DEFAULTS {I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
513	I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
514	I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
515	I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
516	I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
517	I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
518	I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
519	I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
520	I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
521	I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
522	I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
523	I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
524	I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
525	I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
526	I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
527	I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END}
528
529	/* This is ugly. We need to evaluate I2C_CLIENT_MAX_OPTS before it is
530	stringified */
531	#define I2C_CLIENT_MODPARM_AUX1(x) "1-" #x "h"
532	#define I2C_CLIENT_MODPARM_AUX(x) I2C_CLIENT_MODPARM_AUX1(x)
533	#define I2C_CLIENT_MODPARM I2C_CLIENT_MODPARM_AUX(I2C_CLIENT_MAX_OPTS)
534
535	/* I2C_CLIENT_MODULE_PARM creates a module parameter, and puts it in the
536	module header */
537
538	#define I2C_CLIENT_MODULE_PARM(var,desc) \
539	static unsigned short var[I2C_CLIENT_MAX_OPTS] = I2C_CLIENT_DEFAULTS; \
540	MODULE_PARM(var,I2C_CLIENT_MODPARM); \
541	MODULE_PARM_DESC(var,desc)
542
543	/* This is the one you want to use in your own modules */
544	#define I2C_CLIENT_INSMOD \
545	I2C_CLIENT_MODULE_PARM(probe, \
546	"List of adapter,address pairs to scan additionally"); \
547	I2C_CLIENT_MODULE_PARM(probe_range, \
548	"List of adapter,start-addr,end-addr triples to scan " \
549	"additionally"); \
550	I2C_CLIENT_MODULE_PARM(ignore, \
551	"List of adapter,address pairs not to scan"); \
552	I2C_CLIENT_MODULE_PARM(ignore_range, \
553	"List of adapter,start-addr,end-addr triples not to " \
554	"scan"); \
555	I2C_CLIENT_MODULE_PARM(force, \
556	"List of adapter,address pairs to boldly assume " \
557	"to be present"); \
558	static struct i2c_client_address_data addr_data = \
559	{normal_i2c, normal_i2c_range, \
560	probe, probe_range, \
561	ignore, ignore_range, \
562	force}
563
564	/* Detect whether we are on the isa bus. If this returns true, all i2c
565	access will fail! */
566	#define i2c_is_isa_client(clientptr) \
567	((clientptr)->adapter->algo->id == I2C_ALGO_ISA)
568	#define i2c_is_isa_adapter(adapptr) \
569	((adapptr)->algo->id == I2C_ALGO_ISA)
570
571	#endif /* def __KERNEL__ */
572	#endif /* I2C_H */

Note: See TracBrowser for help on using the browser.

Context Navigation

root/i2c/trunk/kernel/i2c.h @ 3621

Download in other formats: