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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* ------------------------------------------------------------------------- */
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: i2c.h,v 1.68 2003/01/21 08:08:16 kmalkki Exp $ */
27
28#ifndef _LINUX_I2C_H
29#define _LINUX_I2C_H
30
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>
36
Jean Delvareefde7232005-07-20 23:03:50 +020037/* --- For i2c-isa ---------------------------------------------------- */
38
39extern void i2c_adapter_dev_release(struct device *dev);
40extern struct device_driver i2c_adapter_driver;
41extern struct class i2c_adapter_class;
42extern struct bus_type i2c_bus_type;
43
Linus Torvalds1da177e2005-04-16 15:20:36 -070044/* --- General options ------------------------------------------------ */
45
46struct i2c_msg;
47struct i2c_algorithm;
48struct i2c_adapter;
49struct i2c_client;
50struct i2c_driver;
51struct i2c_client_address_data;
52union i2c_smbus_data;
53
54/*
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.
59 */
60extern int i2c_master_send(struct i2c_client *,const char* ,int);
61extern int i2c_master_recv(struct i2c_client *,char* ,int);
62
63/* Transfer num messages.
64 */
65extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num);
66
67/*
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.
70 */
71extern int i2c_slave_send(struct i2c_client *,char*,int);
72extern int i2c_slave_recv(struct i2c_client *,char*,int);
73
74
75
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. */
81extern s32 i2c_smbus_xfer (struct i2c_adapter * adapter, u16 addr,
82 unsigned short flags,
83 char read_write, u8 command, int size,
84 union i2c_smbus_data * data);
85
86/* Now follow the 'nice' access routines. These also document the calling
87 conventions of smbus_access. */
88
89extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value);
90extern s32 i2c_smbus_read_byte(struct i2c_client * client);
91extern s32 i2c_smbus_write_byte(struct i2c_client * client, u8 value);
92extern s32 i2c_smbus_read_byte_data(struct i2c_client * client, u8 command);
93extern s32 i2c_smbus_write_byte_data(struct i2c_client * client,
94 u8 command, u8 value);
95extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);
96extern s32 i2c_smbus_write_word_data(struct i2c_client * client,
97 u8 command, u16 value);
98/* Returns the number of bytes transferred */
99extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
100 u8 command, u8 length,
101 u8 *values);
102extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,
103 u8 command, u8 *values);
104
105/*
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
108 * events.
109 */
110
111struct i2c_driver {
112 struct module *owner;
113 char name[32];
114 int id;
115 unsigned int class;
116 unsigned int flags; /* div., see below */
117
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
122 * i2c_attach_client.
123 */
124 int (*attach_adapter)(struct i2c_adapter *);
125 int (*detach_adapter)(struct i2c_adapter *);
126
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.
131 */
132 int (*detach_client)(struct i2c_client *);
133
134 /* a ioctl like command that can be used to perform specific functions
135 * with the device.
136 */
137 int (*command)(struct i2c_client *client,unsigned int cmd, void *arg);
138
139 struct device_driver driver;
140 struct list_head list;
141};
142#define to_i2c_driver(d) container_of(d, struct i2c_driver, driver)
143
144#define I2C_NAME_SIZE 50
145
146/*
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.
150 */
151struct i2c_client {
152 unsigned int flags; /* div., see below */
Jean Delvare50718602005-07-20 00:02:32 +0200153 unsigned short addr; /* chip address - NOTE: 7bit */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 /* addresses are stored in the */
Jean Delvare50718602005-07-20 00:02:32 +0200155 /* _LOWER_ 7 bits */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 struct i2c_adapter *adapter; /* the adapter we sit on */
157 struct i2c_driver *driver; /* and our access routines */
158 int usage_count; /* How many accesses currently */
159 /* to the client */
160 struct device dev; /* the device structure */
161 struct list_head list;
162 char name[I2C_NAME_SIZE];
163 struct completion released;
164};
165#define to_i2c_client(d) container_of(d, struct i2c_client, dev)
166
bgardner@wabtec.coma61fc682005-07-27 12:43:03 -0500167static inline struct i2c_client *kobj_to_i2c_client(struct kobject *kobj)
168{
169 return to_i2c_client(container_of(kobj, struct device, kobj));
170}
171
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172static inline void *i2c_get_clientdata (struct i2c_client *dev)
173{
174 return dev_get_drvdata (&dev->dev);
175}
176
177static inline void i2c_set_clientdata (struct i2c_client *dev, void *data)
178{
179 dev_set_drvdata (&dev->dev, data);
180}
181
182#define I2C_DEVNAME(str) .name = str
183
184static inline char *i2c_clientname(struct i2c_client *c)
185{
186 return &c->name[0];
187}
188
189/*
190 * The following structs are for those who like to implement new bus drivers:
191 * i2c_algorithm is the interface to a class of hardware solutions which can
192 * be addressed using the same bus algorithms - i.e. bit-banging or the PCF8584
193 * to name two of the most common.
194 */
195struct i2c_algorithm {
196 char name[32]; /* textual description */
197 unsigned int id;
198
199 /* If an adapter algorithm can't do I2C-level access, set master_xfer
200 to NULL. If an adapter algorithm can do SMBus access, set
201 smbus_xfer. If set to NULL, the SMBus protocol is simulated
202 using common I2C messages */
203 int (*master_xfer)(struct i2c_adapter *adap,struct i2c_msg *msgs,
204 int num);
205 int (*smbus_xfer) (struct i2c_adapter *adap, u16 addr,
206 unsigned short flags, char read_write,
207 u8 command, int size, union i2c_smbus_data * data);
208
209 /* --- these optional/future use for some adapter types.*/
210 int (*slave_send)(struct i2c_adapter *,char*,int);
211 int (*slave_recv)(struct i2c_adapter *,char*,int);
212
213 /* --- ioctl like call to set div. parameters. */
214 int (*algo_control)(struct i2c_adapter *, unsigned int, unsigned long);
215
216 /* To determine what the adapter supports */
217 u32 (*functionality) (struct i2c_adapter *);
218};
219
220/*
221 * i2c_adapter is the structure used to identify a physical i2c bus along
222 * with the access algorithms necessary to access it.
223 */
224struct i2c_adapter {
225 struct module *owner;
226 unsigned int id;/* == is algo->id | hwdep.struct->id, */
227 /* for registered values see below */
228 unsigned int class;
229 struct i2c_algorithm *algo;/* the algorithm to access the bus */
230 void *algo_data;
231
232 /* --- administration stuff. */
233 int (*client_register)(struct i2c_client *);
234 int (*client_unregister)(struct i2c_client *);
235
236 /* data fields that are valid for all devices */
237 struct semaphore bus_lock;
238 struct semaphore clist_lock;
239
240 int timeout;
241 int retries;
242 struct device dev; /* the adapter device */
243 struct class_device class_dev; /* the class device */
244
245#ifdef CONFIG_PROC_FS
246 /* No need to set this when you initialize the adapter */
247 int inode;
248#endif /* def CONFIG_PROC_FS */
249
250 int nr;
251 struct list_head clients;
252 struct list_head list;
253 char name[I2C_NAME_SIZE];
254 struct completion dev_released;
255 struct completion class_dev_released;
256};
257#define dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev)
258#define class_dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, class_dev)
259
260static inline void *i2c_get_adapdata (struct i2c_adapter *dev)
261{
262 return dev_get_drvdata (&dev->dev);
263}
264
265static inline void i2c_set_adapdata (struct i2c_adapter *dev, void *data)
266{
267 dev_set_drvdata (&dev->dev, data);
268}
269
270/*flags for the driver struct: */
271#define I2C_DF_NOTIFY 0x01 /* notify on bus (de/a)ttaches */
272#if 0
273/* this flag is gone -- there is a (optional) driver->detach_adapter
274 * callback now which can be used instead */
275# define I2C_DF_DUMMY 0x02
276#endif
277
278/*flags for the client struct: */
279#define I2C_CLIENT_ALLOW_USE 0x01 /* Client allows access */
280#define I2C_CLIENT_ALLOW_MULTIPLE_USE 0x02 /* Allow multiple access-locks */
281 /* on an i2c_client */
282#define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */
283#define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */
284 /* Must equal I2C_M_TEN below */
285
286/* i2c adapter classes (bitmask) */
287#define I2C_CLASS_HWMON (1<<0) /* lm_sensors, ... */
288#define I2C_CLASS_TV_ANALOG (1<<1) /* bttv + friends */
289#define I2C_CLASS_TV_DIGITAL (1<<2) /* dvb cards */
290#define I2C_CLASS_DDC (1<<3) /* i2c-matroxfb ? */
291#define I2C_CLASS_CAM_ANALOG (1<<4) /* camera with analog CCD */
292#define I2C_CLASS_CAM_DIGITAL (1<<5) /* most webcams */
293#define I2C_CLASS_SOUND (1<<6) /* sound devices */
294#define I2C_CLASS_ALL (UINT_MAX) /* all of the above */
295
296/* i2c_client_address_data is the struct for holding default client
297 * addresses for a driver and for the parameters supplied on the
298 * command line
299 */
300struct i2c_client_address_data {
301 unsigned short *normal_i2c;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 unsigned short *probe;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 unsigned short *ignore;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 unsigned short *force;
305};
306
307/* Internal numbers to terminate lists */
308#define I2C_CLIENT_END 0xfffeU
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309
310/* The numbers to use to set I2C bus address */
311#define ANY_I2C_BUS 0xffff
312#define ANY_I2C_ISA_BUS 9191
313
314
315/* ----- functions exported by i2c.o */
316
317/* administration...
318 */
319extern int i2c_add_adapter(struct i2c_adapter *);
320extern int i2c_del_adapter(struct i2c_adapter *);
321
322extern int i2c_add_driver(struct i2c_driver *);
323extern int i2c_del_driver(struct i2c_driver *);
324
325extern int i2c_attach_client(struct i2c_client *);
326extern int i2c_detach_client(struct i2c_client *);
327
328/* New function: This is to get an i2c_client-struct for controlling the
329 client either by using i2c_control-function or having the
330 client-module export functions that can be used with the i2c_client
331 -struct. */
332extern struct i2c_client *i2c_get_client(int driver_id, int adapter_id,
333 struct i2c_client *prev);
334
335/* Should be used with new function
336 extern struct i2c_client *i2c_get_client(int,int,struct i2c_client *);
337 to make sure that client-struct is valid and that it is okay to access
338 the i2c-client.
339 returns -EACCES if client doesn't allow use (default)
340 returns -EBUSY if client doesn't allow multiple use (default) and
341 usage_count >0 */
342extern int i2c_use_client(struct i2c_client *);
343extern int i2c_release_client(struct i2c_client *);
344
345/* call the i2c_client->command() of all attached clients with
346 * the given arguments */
347extern void i2c_clients_command(struct i2c_adapter *adap,
348 unsigned int cmd, void *arg);
349
350/* returns -EBUSY if address has been taken, 0 if not. Note that the only
351 other place at which this is called is within i2c_attach_client; so
352 you can cheat by simply not registering. Not recommended, of course! */
353extern int i2c_check_addr (struct i2c_adapter *adapter, int addr);
354
355/* Detect function. It iterates over all possible addresses itself.
356 * It will only call found_proc if some client is connected at the
357 * specific address (unless a 'force' matched);
358 */
359extern int i2c_probe(struct i2c_adapter *adapter,
360 struct i2c_client_address_data *address_data,
361 int (*found_proc) (struct i2c_adapter *, int, int));
362
363/* An ioctl like call to set div. parameters of the adapter.
364 */
365extern int i2c_control(struct i2c_client *,unsigned int, unsigned long);
366
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367extern struct i2c_adapter* i2c_get_adapter(int id);
368extern void i2c_put_adapter(struct i2c_adapter *adap);
369
370
371/* Return the functionality mask */
372static inline u32 i2c_get_functionality(struct i2c_adapter *adap)
373{
374 return adap->algo->functionality(adap);
375}
376
377/* Return 1 if adapter supports everything we need, 0 if not. */
378static inline int i2c_check_functionality(struct i2c_adapter *adap, u32 func)
379{
380 return (func & i2c_get_functionality(adap)) == func;
381}
382
Jean Delvarecdcb1922005-07-28 23:09:40 +0200383/* Return id number for a specific adapter */
384static inline int i2c_adapter_id(struct i2c_adapter *adap)
385{
386 return adap->nr;
387}
388
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389/*
390 * I2C Message - used for pure i2c transaction, also from /dev interface
391 */
392struct i2c_msg {
393 __u16 addr; /* slave address */
394 __u16 flags;
395#define I2C_M_TEN 0x10 /* we have a ten bit chip address */
396#define I2C_M_RD 0x01
397#define I2C_M_NOSTART 0x4000
398#define I2C_M_REV_DIR_ADDR 0x2000
399#define I2C_M_IGNORE_NAK 0x1000
400#define I2C_M_NO_RD_ACK 0x0800
401 __u16 len; /* msg length */
402 __u8 *buf; /* pointer to msg data */
403};
404
405/* To determine what functionality is present */
406
407#define I2C_FUNC_I2C 0x00000001
408#define I2C_FUNC_10BIT_ADDR 0x00000002
409#define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
410#define I2C_FUNC_SMBUS_HWPEC_CALC 0x00000008 /* SMBus 2.0 */
411#define I2C_FUNC_SMBUS_READ_WORD_DATA_PEC 0x00000800 /* SMBus 2.0 */
412#define I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC 0x00001000 /* SMBus 2.0 */
413#define I2C_FUNC_SMBUS_PROC_CALL_PEC 0x00002000 /* SMBus 2.0 */
414#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL_PEC 0x00004000 /* SMBus 2.0 */
415#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */
416#define I2C_FUNC_SMBUS_QUICK 0x00010000
417#define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
418#define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
419#define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
420#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
421#define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
422#define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
423#define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
424#define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
425#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
426#define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */
427#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */
428#define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 0x10000000 /* I2C-like block xfer */
429#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */
430#define I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC 0x40000000 /* SMBus 2.0 */
431#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC 0x80000000 /* SMBus 2.0 */
432
433#define I2C_FUNC_SMBUS_BYTE (I2C_FUNC_SMBUS_READ_BYTE | \
434 I2C_FUNC_SMBUS_WRITE_BYTE)
435#define I2C_FUNC_SMBUS_BYTE_DATA (I2C_FUNC_SMBUS_READ_BYTE_DATA | \
436 I2C_FUNC_SMBUS_WRITE_BYTE_DATA)
437#define I2C_FUNC_SMBUS_WORD_DATA (I2C_FUNC_SMBUS_READ_WORD_DATA | \
438 I2C_FUNC_SMBUS_WRITE_WORD_DATA)
439#define I2C_FUNC_SMBUS_BLOCK_DATA (I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
440 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA)
441#define I2C_FUNC_SMBUS_I2C_BLOCK (I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
442 I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)
443#define I2C_FUNC_SMBUS_I2C_BLOCK_2 (I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 | \
444 I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2)
445#define I2C_FUNC_SMBUS_BLOCK_DATA_PEC (I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC | \
446 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC)
447#define I2C_FUNC_SMBUS_WORD_DATA_PEC (I2C_FUNC_SMBUS_READ_WORD_DATA_PEC | \
448 I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC)
449
450#define I2C_FUNC_SMBUS_READ_BYTE_PEC I2C_FUNC_SMBUS_READ_BYTE_DATA
451#define I2C_FUNC_SMBUS_WRITE_BYTE_PEC I2C_FUNC_SMBUS_WRITE_BYTE_DATA
452#define I2C_FUNC_SMBUS_READ_BYTE_DATA_PEC I2C_FUNC_SMBUS_READ_WORD_DATA
453#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA_PEC I2C_FUNC_SMBUS_WRITE_WORD_DATA
454#define I2C_FUNC_SMBUS_BYTE_PEC I2C_FUNC_SMBUS_BYTE_DATA
455#define I2C_FUNC_SMBUS_BYTE_DATA_PEC I2C_FUNC_SMBUS_WORD_DATA
456
457#define I2C_FUNC_SMBUS_EMUL (I2C_FUNC_SMBUS_QUICK | \
458 I2C_FUNC_SMBUS_BYTE | \
459 I2C_FUNC_SMBUS_BYTE_DATA | \
460 I2C_FUNC_SMBUS_WORD_DATA | \
461 I2C_FUNC_SMBUS_PROC_CALL | \
462 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
463 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC | \
464 I2C_FUNC_SMBUS_I2C_BLOCK)
465
466/*
467 * Data for SMBus Messages
468 */
469#define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */
470#define I2C_SMBUS_I2C_BLOCK_MAX 32 /* Not specified but we use same structure */
471union i2c_smbus_data {
472 __u8 byte;
473 __u16 word;
474 __u8 block[I2C_SMBUS_BLOCK_MAX + 3]; /* block[0] is used for length */
475 /* one more for read length in block process call */
476 /* and one more for PEC */
477};
478
479/* smbus_access read or write markers */
480#define I2C_SMBUS_READ 1
481#define I2C_SMBUS_WRITE 0
482
483/* SMBus transaction types (size parameter in the above functions)
484 Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
485#define I2C_SMBUS_QUICK 0
486#define I2C_SMBUS_BYTE 1
487#define I2C_SMBUS_BYTE_DATA 2
488#define I2C_SMBUS_WORD_DATA 3
489#define I2C_SMBUS_PROC_CALL 4
490#define I2C_SMBUS_BLOCK_DATA 5
491#define I2C_SMBUS_I2C_BLOCK_DATA 6
492#define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */
493#define I2C_SMBUS_BLOCK_DATA_PEC 8 /* SMBus 2.0 */
494#define I2C_SMBUS_PROC_CALL_PEC 9 /* SMBus 2.0 */
495#define I2C_SMBUS_BLOCK_PROC_CALL_PEC 10 /* SMBus 2.0 */
496#define I2C_SMBUS_WORD_DATA_PEC 11 /* SMBus 2.0 */
497
498
499/* ----- commands for the ioctl like i2c_command call:
500 * note that additional calls are defined in the algorithm and hw
501 * dependent layers - these can be listed here, or see the
502 * corresponding header files.
503 */
504 /* -> bit-adapter specific ioctls */
505#define I2C_RETRIES 0x0701 /* number of times a device address */
506 /* should be polled when not */
507 /* acknowledging */
508#define I2C_TIMEOUT 0x0702 /* set timeout - call with int */
509
510
511/* this is for i2c-dev.c */
512#define I2C_SLAVE 0x0703 /* Change slave address */
513 /* Attn.: Slave address is 7 or 10 bits */
514#define I2C_SLAVE_FORCE 0x0706 /* Change slave address */
515 /* Attn.: Slave address is 7 or 10 bits */
516 /* This changes the address, even if it */
517 /* is already taken! */
518#define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */
519
520#define I2C_FUNCS 0x0705 /* Get the adapter functionality */
521#define I2C_RDWR 0x0707 /* Combined R/W transfer (one stop only)*/
522#define I2C_PEC 0x0708 /* != 0 for SMBus PEC */
523#if 0
524#define I2C_ACK_TEST 0x0710 /* See if a slave is at a specific address */
525#endif
526
527#define I2C_SMBUS 0x0720 /* SMBus-level access */
528
529/* ... algo-bit.c recognizes */
530#define I2C_UDELAY 0x0705 /* set delay in microsecs between each */
531 /* written byte (except address) */
532#define I2C_MDELAY 0x0706 /* millisec delay between written bytes */
533
534/* ----- I2C-DEV: char device interface stuff ------------------------- */
535
536#define I2C_MAJOR 89 /* Device major number */
537
538/* These defines are used for probing i2c client addresses */
539/* The length of the option lists */
540#define I2C_CLIENT_MAX_OPTS 48
541
542/* Default fill of many variables */
543#define I2C_CLIENT_DEFAULTS {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, \
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
560/* I2C_CLIENT_MODULE_PARM creates a module parameter, and puts it in the
561 module header */
562
563#define I2C_CLIENT_MODULE_PARM(var,desc) \
564 static unsigned short var[I2C_CLIENT_MAX_OPTS] = I2C_CLIENT_DEFAULTS; \
565 static unsigned int var##_num; \
566 module_param_array(var, short, &var##_num, 0); \
567 MODULE_PARM_DESC(var,desc)
568
569/* This is the one you want to use in your own modules */
570#define I2C_CLIENT_INSMOD \
571 I2C_CLIENT_MODULE_PARM(probe, \
572 "List of adapter,address pairs to scan additionally"); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 I2C_CLIENT_MODULE_PARM(ignore, \
574 "List of adapter,address pairs not to scan"); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 I2C_CLIENT_MODULE_PARM(force, \
576 "List of adapter,address pairs to boldly assume " \
577 "to be present"); \
578 static struct i2c_client_address_data addr_data = { \
579 .normal_i2c = normal_i2c, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 .probe = probe, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 .ignore = ignore, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 .force = force, \
583 }
584
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585#endif /* _LINUX_I2C_H */