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1da177e4 LT |
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 | ||
a1b9298e | 23 | /* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and |
1da177e4 LT |
24 | Frodo Looijaard <frodol@dds.nl> */ |
25 | ||
1da177e4 LT |
26 | #ifndef _LINUX_I2C_H |
27 | #define _LINUX_I2C_H | |
28 | ||
1da177e4 | 29 | #include <linux/types.h> |
a1b9298e DW |
30 | #ifdef __KERNEL__ |
31 | #include <linux/module.h> | |
1da177e4 | 32 | #include <linux/i2c-id.h> |
a9d1b24d | 33 | #include <linux/mod_devicetable.h> |
1da177e4 | 34 | #include <linux/device.h> /* for struct device */ |
4e57b681 | 35 | #include <linux/sched.h> /* for completion */ |
5c085d36 | 36 | #include <linux/mutex.h> |
1da177e4 | 37 | |
efde723f JD |
38 | /* --- For i2c-isa ---------------------------------------------------- */ |
39 | ||
40 | extern void i2c_adapter_dev_release(struct device *dev); | |
41 | extern struct device_driver i2c_adapter_driver; | |
42 | extern struct class i2c_adapter_class; | |
43 | extern struct bus_type i2c_bus_type; | |
44 | ||
1da177e4 LT |
45 | /* --- General options ------------------------------------------------ */ |
46 | ||
47 | struct i2c_msg; | |
48 | struct i2c_algorithm; | |
49 | struct i2c_adapter; | |
50 | struct i2c_client; | |
51 | struct i2c_driver; | |
1da177e4 LT |
52 | union 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 | */ | |
60 | extern int i2c_master_send(struct i2c_client *,const char* ,int); | |
61 | extern int i2c_master_recv(struct i2c_client *,char* ,int); | |
62 | ||
63 | /* Transfer num messages. | |
64 | */ | |
65 | extern 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 | */ | |
71 | extern int i2c_slave_send(struct i2c_client *,char*,int); | |
72 | extern 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. */ | |
81 | extern 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 | ||
89 | extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value); | |
90 | extern s32 i2c_smbus_read_byte(struct i2c_client * client); | |
91 | extern s32 i2c_smbus_write_byte(struct i2c_client * client, u8 value); | |
92 | extern s32 i2c_smbus_read_byte_data(struct i2c_client * client, u8 command); | |
93 | extern s32 i2c_smbus_write_byte_data(struct i2c_client * client, | |
94 | u8 command, u8 value); | |
95 | extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command); | |
96 | extern s32 i2c_smbus_write_word_data(struct i2c_client * client, | |
97 | u8 command, u16 value); | |
1da177e4 LT |
98 | extern s32 i2c_smbus_write_block_data(struct i2c_client * client, |
99 | u8 command, u8 length, | |
46f5ed75 | 100 | const u8 *values); |
31ec5bc5 | 101 | /* Returns the number of read bytes */ |
1da177e4 LT |
102 | extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client, |
103 | u8 command, u8 *values); | |
21bbd691 JD |
104 | extern s32 i2c_smbus_write_i2c_block_data(struct i2c_client * client, |
105 | u8 command, u8 length, | |
46f5ed75 | 106 | const u8 *values); |
1da177e4 LT |
107 | |
108 | /* | |
109 | * A driver is capable of handling one or more physical devices present on | |
110 | * I2C adapters. This information is used to inform the driver of adapter | |
111 | * events. | |
35d8b2e6 LR |
112 | * |
113 | * The driver.owner field should be set to the module owner of this driver. | |
114 | * The driver.name field should be set to the name of this driver. | |
1da177e4 LT |
115 | */ |
116 | ||
117 | struct i2c_driver { | |
1da177e4 LT |
118 | int id; |
119 | unsigned int class; | |
1da177e4 LT |
120 | |
121 | /* Notifies the driver that a new bus has appeared. This routine | |
122 | * can be used by the driver to test if the bus meets its conditions | |
123 | * & seek for the presence of the chip(s) it supports. If found, it | |
124 | * registers the client(s) that are on the bus to the i2c admin. via | |
125 | * i2c_attach_client. | |
126 | */ | |
127 | int (*attach_adapter)(struct i2c_adapter *); | |
128 | int (*detach_adapter)(struct i2c_adapter *); | |
129 | ||
130 | /* tells the driver that a client is about to be deleted & gives it | |
131 | * the chance to remove its private data. Also, if the client struct | |
132 | * has been dynamically allocated by the driver in the function above, | |
133 | * it must be freed here. | |
134 | */ | |
135 | int (*detach_client)(struct i2c_client *); | |
136 | ||
137 | /* a ioctl like command that can be used to perform specific functions | |
138 | * with the device. | |
139 | */ | |
140 | int (*command)(struct i2c_client *client,unsigned int cmd, void *arg); | |
141 | ||
142 | struct device_driver driver; | |
143 | struct list_head list; | |
144 | }; | |
145 | #define to_i2c_driver(d) container_of(d, struct i2c_driver, driver) | |
146 | ||
147 | #define I2C_NAME_SIZE 50 | |
148 | ||
149 | /* | |
150 | * i2c_client identifies a single device (i.e. chip) that is connected to an | |
151 | * i2c bus. The behaviour is defined by the routines of the driver. This | |
152 | * function is mainly used for lookup & other admin. functions. | |
153 | */ | |
154 | struct i2c_client { | |
155 | unsigned int flags; /* div., see below */ | |
5071860a | 156 | unsigned short addr; /* chip address - NOTE: 7bit */ |
1da177e4 | 157 | /* addresses are stored in the */ |
5071860a | 158 | /* _LOWER_ 7 bits */ |
1da177e4 LT |
159 | struct i2c_adapter *adapter; /* the adapter we sit on */ |
160 | struct i2c_driver *driver; /* and our access routines */ | |
161 | int usage_count; /* How many accesses currently */ | |
162 | /* to the client */ | |
163 | struct device dev; /* the device structure */ | |
164 | struct list_head list; | |
165 | char name[I2C_NAME_SIZE]; | |
166 | struct completion released; | |
167 | }; | |
168 | #define to_i2c_client(d) container_of(d, struct i2c_client, dev) | |
169 | ||
a61fc683 | 170 | static inline struct i2c_client *kobj_to_i2c_client(struct kobject *kobj) |
171 | { | |
172 | return to_i2c_client(container_of(kobj, struct device, kobj)); | |
173 | } | |
174 | ||
1da177e4 LT |
175 | static inline void *i2c_get_clientdata (struct i2c_client *dev) |
176 | { | |
177 | return dev_get_drvdata (&dev->dev); | |
178 | } | |
179 | ||
180 | static inline void i2c_set_clientdata (struct i2c_client *dev, void *data) | |
181 | { | |
182 | dev_set_drvdata (&dev->dev, data); | |
183 | } | |
184 | ||
1da177e4 LT |
185 | /* |
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. | |
190 | */ | |
191 | struct i2c_algorithm { | |
1da177e4 LT |
192 | /* If an adapter algorithm can't do I2C-level access, set master_xfer |
193 | to NULL. If an adapter algorithm can do SMBus access, set | |
194 | smbus_xfer. If set to NULL, the SMBus protocol is simulated | |
195 | using common I2C messages */ | |
196 | int (*master_xfer)(struct i2c_adapter *adap,struct i2c_msg *msgs, | |
197 | int num); | |
198 | int (*smbus_xfer) (struct i2c_adapter *adap, u16 addr, | |
199 | unsigned short flags, char read_write, | |
200 | u8 command, int size, union i2c_smbus_data * data); | |
201 | ||
202 | /* --- these optional/future use for some adapter types.*/ | |
203 | int (*slave_send)(struct i2c_adapter *,char*,int); | |
204 | int (*slave_recv)(struct i2c_adapter *,char*,int); | |
205 | ||
206 | /* --- ioctl like call to set div. parameters. */ | |
207 | int (*algo_control)(struct i2c_adapter *, unsigned int, unsigned long); | |
208 | ||
209 | /* To determine what the adapter supports */ | |
210 | u32 (*functionality) (struct i2c_adapter *); | |
211 | }; | |
212 | ||
213 | /* | |
214 | * i2c_adapter is the structure used to identify a physical i2c bus along | |
215 | * with the access algorithms necessary to access it. | |
216 | */ | |
217 | struct i2c_adapter { | |
218 | struct module *owner; | |
020789e9 | 219 | unsigned int id; |
1da177e4 LT |
220 | unsigned int class; |
221 | struct i2c_algorithm *algo;/* the algorithm to access the bus */ | |
222 | void *algo_data; | |
223 | ||
224 | /* --- administration stuff. */ | |
225 | int (*client_register)(struct i2c_client *); | |
226 | int (*client_unregister)(struct i2c_client *); | |
227 | ||
228 | /* data fields that are valid for all devices */ | |
5c085d36 IM |
229 | struct mutex bus_lock; |
230 | struct mutex clist_lock; | |
1da177e4 LT |
231 | |
232 | int timeout; | |
233 | int retries; | |
234 | struct device dev; /* the adapter device */ | |
235 | struct class_device class_dev; /* the class device */ | |
236 | ||
1da177e4 LT |
237 | int nr; |
238 | struct list_head clients; | |
239 | struct list_head list; | |
240 | char name[I2C_NAME_SIZE]; | |
241 | struct completion dev_released; | |
242 | struct completion class_dev_released; | |
243 | }; | |
244 | #define dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev) | |
245 | #define class_dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, class_dev) | |
246 | ||
247 | static inline void *i2c_get_adapdata (struct i2c_adapter *dev) | |
248 | { | |
249 | return dev_get_drvdata (&dev->dev); | |
250 | } | |
251 | ||
252 | static inline void i2c_set_adapdata (struct i2c_adapter *dev, void *data) | |
253 | { | |
254 | dev_set_drvdata (&dev->dev, data); | |
255 | } | |
256 | ||
1da177e4 | 257 | /*flags for the client struct: */ |
1da177e4 LT |
258 | #define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */ |
259 | #define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */ | |
260 | /* Must equal I2C_M_TEN below */ | |
261 | ||
262 | /* i2c adapter classes (bitmask) */ | |
263 | #define I2C_CLASS_HWMON (1<<0) /* lm_sensors, ... */ | |
264 | #define I2C_CLASS_TV_ANALOG (1<<1) /* bttv + friends */ | |
265 | #define I2C_CLASS_TV_DIGITAL (1<<2) /* dvb cards */ | |
266 | #define I2C_CLASS_DDC (1<<3) /* i2c-matroxfb ? */ | |
267 | #define I2C_CLASS_CAM_ANALOG (1<<4) /* camera with analog CCD */ | |
268 | #define I2C_CLASS_CAM_DIGITAL (1<<5) /* most webcams */ | |
269 | #define I2C_CLASS_SOUND (1<<6) /* sound devices */ | |
270 | #define I2C_CLASS_ALL (UINT_MAX) /* all of the above */ | |
271 | ||
272 | /* i2c_client_address_data is the struct for holding default client | |
273 | * addresses for a driver and for the parameters supplied on the | |
274 | * command line | |
275 | */ | |
276 | struct i2c_client_address_data { | |
277 | unsigned short *normal_i2c; | |
1da177e4 | 278 | unsigned short *probe; |
1da177e4 | 279 | unsigned short *ignore; |
9fc6adfa | 280 | unsigned short **forces; |
1da177e4 LT |
281 | }; |
282 | ||
283 | /* Internal numbers to terminate lists */ | |
284 | #define I2C_CLIENT_END 0xfffeU | |
1da177e4 LT |
285 | |
286 | /* The numbers to use to set I2C bus address */ | |
287 | #define ANY_I2C_BUS 0xffff | |
288 | #define ANY_I2C_ISA_BUS 9191 | |
289 | ||
290 | ||
291 | /* ----- functions exported by i2c.o */ | |
292 | ||
293 | /* administration... | |
294 | */ | |
295 | extern int i2c_add_adapter(struct i2c_adapter *); | |
296 | extern int i2c_del_adapter(struct i2c_adapter *); | |
297 | ||
de59cf9e | 298 | extern int i2c_register_driver(struct module *, struct i2c_driver *); |
1da177e4 LT |
299 | extern int i2c_del_driver(struct i2c_driver *); |
300 | ||
de59cf9e GKH |
301 | static inline int i2c_add_driver(struct i2c_driver *driver) |
302 | { | |
303 | return i2c_register_driver(THIS_MODULE, driver); | |
304 | } | |
305 | ||
1da177e4 LT |
306 | extern int i2c_attach_client(struct i2c_client *); |
307 | extern int i2c_detach_client(struct i2c_client *); | |
308 | ||
482c788d JD |
309 | /* Should be used to make sure that client-struct is valid and that it |
310 | is okay to access the i2c-client. | |
cf02df77 | 311 | returns -ENODEV if client has gone in the meantime */ |
1da177e4 LT |
312 | extern int i2c_use_client(struct i2c_client *); |
313 | extern int i2c_release_client(struct i2c_client *); | |
314 | ||
315 | /* call the i2c_client->command() of all attached clients with | |
316 | * the given arguments */ | |
317 | extern void i2c_clients_command(struct i2c_adapter *adap, | |
318 | unsigned int cmd, void *arg); | |
319 | ||
320 | /* returns -EBUSY if address has been taken, 0 if not. Note that the only | |
321 | other place at which this is called is within i2c_attach_client; so | |
322 | you can cheat by simply not registering. Not recommended, of course! */ | |
323 | extern int i2c_check_addr (struct i2c_adapter *adapter, int addr); | |
324 | ||
325 | /* Detect function. It iterates over all possible addresses itself. | |
326 | * It will only call found_proc if some client is connected at the | |
327 | * specific address (unless a 'force' matched); | |
328 | */ | |
329 | extern int i2c_probe(struct i2c_adapter *adapter, | |
330 | struct i2c_client_address_data *address_data, | |
331 | int (*found_proc) (struct i2c_adapter *, int, int)); | |
332 | ||
333 | /* An ioctl like call to set div. parameters of the adapter. | |
334 | */ | |
335 | extern int i2c_control(struct i2c_client *,unsigned int, unsigned long); | |
336 | ||
1da177e4 LT |
337 | extern struct i2c_adapter* i2c_get_adapter(int id); |
338 | extern void i2c_put_adapter(struct i2c_adapter *adap); | |
339 | ||
340 | ||
341 | /* Return the functionality mask */ | |
342 | static inline u32 i2c_get_functionality(struct i2c_adapter *adap) | |
343 | { | |
344 | return adap->algo->functionality(adap); | |
345 | } | |
346 | ||
347 | /* Return 1 if adapter supports everything we need, 0 if not. */ | |
348 | static inline int i2c_check_functionality(struct i2c_adapter *adap, u32 func) | |
349 | { | |
350 | return (func & i2c_get_functionality(adap)) == func; | |
351 | } | |
352 | ||
cdcb1921 JD |
353 | /* Return id number for a specific adapter */ |
354 | static inline int i2c_adapter_id(struct i2c_adapter *adap) | |
355 | { | |
356 | return adap->nr; | |
357 | } | |
a1b9298e | 358 | #endif /* __KERNEL__ */ |
cdcb1921 | 359 | |
1da177e4 LT |
360 | /* |
361 | * I2C Message - used for pure i2c transaction, also from /dev interface | |
362 | */ | |
363 | struct i2c_msg { | |
364 | __u16 addr; /* slave address */ | |
365 | __u16 flags; | |
366 | #define I2C_M_TEN 0x10 /* we have a ten bit chip address */ | |
367 | #define I2C_M_RD 0x01 | |
368 | #define I2C_M_NOSTART 0x4000 | |
369 | #define I2C_M_REV_DIR_ADDR 0x2000 | |
370 | #define I2C_M_IGNORE_NAK 0x1000 | |
371 | #define I2C_M_NO_RD_ACK 0x0800 | |
372 | __u16 len; /* msg length */ | |
373 | __u8 *buf; /* pointer to msg data */ | |
374 | }; | |
375 | ||
376 | /* To determine what functionality is present */ | |
377 | ||
378 | #define I2C_FUNC_I2C 0x00000001 | |
379 | #define I2C_FUNC_10BIT_ADDR 0x00000002 | |
380 | #define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */ | |
381 | #define I2C_FUNC_SMBUS_HWPEC_CALC 0x00000008 /* SMBus 2.0 */ | |
1da177e4 LT |
382 | #define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */ |
383 | #define I2C_FUNC_SMBUS_QUICK 0x00010000 | |
384 | #define I2C_FUNC_SMBUS_READ_BYTE 0x00020000 | |
385 | #define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000 | |
386 | #define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000 | |
387 | #define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000 | |
388 | #define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000 | |
389 | #define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000 | |
390 | #define I2C_FUNC_SMBUS_PROC_CALL 0x00800000 | |
391 | #define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000 | |
392 | #define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000 | |
393 | #define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */ | |
394 | #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */ | |
395 | #define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 0x10000000 /* I2C-like block xfer */ | |
396 | #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */ | |
1da177e4 LT |
397 | |
398 | #define I2C_FUNC_SMBUS_BYTE (I2C_FUNC_SMBUS_READ_BYTE | \ | |
399 | I2C_FUNC_SMBUS_WRITE_BYTE) | |
400 | #define I2C_FUNC_SMBUS_BYTE_DATA (I2C_FUNC_SMBUS_READ_BYTE_DATA | \ | |
401 | I2C_FUNC_SMBUS_WRITE_BYTE_DATA) | |
402 | #define I2C_FUNC_SMBUS_WORD_DATA (I2C_FUNC_SMBUS_READ_WORD_DATA | \ | |
403 | I2C_FUNC_SMBUS_WRITE_WORD_DATA) | |
404 | #define I2C_FUNC_SMBUS_BLOCK_DATA (I2C_FUNC_SMBUS_READ_BLOCK_DATA | \ | |
405 | I2C_FUNC_SMBUS_WRITE_BLOCK_DATA) | |
406 | #define I2C_FUNC_SMBUS_I2C_BLOCK (I2C_FUNC_SMBUS_READ_I2C_BLOCK | \ | |
407 | I2C_FUNC_SMBUS_WRITE_I2C_BLOCK) | |
408 | #define I2C_FUNC_SMBUS_I2C_BLOCK_2 (I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 | \ | |
409 | I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2) | |
1da177e4 LT |
410 | |
411 | #define I2C_FUNC_SMBUS_EMUL (I2C_FUNC_SMBUS_QUICK | \ | |
412 | I2C_FUNC_SMBUS_BYTE | \ | |
413 | I2C_FUNC_SMBUS_BYTE_DATA | \ | |
414 | I2C_FUNC_SMBUS_WORD_DATA | \ | |
415 | I2C_FUNC_SMBUS_PROC_CALL | \ | |
416 | I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \ | |
1da177e4 LT |
417 | I2C_FUNC_SMBUS_I2C_BLOCK) |
418 | ||
419 | /* | |
420 | * Data for SMBus Messages | |
421 | */ | |
422 | #define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */ | |
1da177e4 LT |
423 | union i2c_smbus_data { |
424 | __u8 byte; | |
425 | __u16 word; | |
332bf92b | 426 | __u8 block[I2C_SMBUS_BLOCK_MAX + 2]; /* block[0] is used for length */ |
421ef47b | 427 | /* and one more for user-space compatibility */ |
1da177e4 LT |
428 | }; |
429 | ||
430 | /* smbus_access read or write markers */ | |
431 | #define I2C_SMBUS_READ 1 | |
432 | #define I2C_SMBUS_WRITE 0 | |
433 | ||
434 | /* SMBus transaction types (size parameter in the above functions) | |
435 | Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */ | |
436 | #define I2C_SMBUS_QUICK 0 | |
437 | #define I2C_SMBUS_BYTE 1 | |
438 | #define I2C_SMBUS_BYTE_DATA 2 | |
439 | #define I2C_SMBUS_WORD_DATA 3 | |
440 | #define I2C_SMBUS_PROC_CALL 4 | |
441 | #define I2C_SMBUS_BLOCK_DATA 5 | |
442 | #define I2C_SMBUS_I2C_BLOCK_DATA 6 | |
443 | #define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */ | |
1da177e4 LT |
444 | |
445 | ||
446 | /* ----- commands for the ioctl like i2c_command call: | |
447 | * note that additional calls are defined in the algorithm and hw | |
448 | * dependent layers - these can be listed here, or see the | |
449 | * corresponding header files. | |
450 | */ | |
451 | /* -> bit-adapter specific ioctls */ | |
452 | #define I2C_RETRIES 0x0701 /* number of times a device address */ | |
453 | /* should be polled when not */ | |
454 | /* acknowledging */ | |
455 | #define I2C_TIMEOUT 0x0702 /* set timeout - call with int */ | |
456 | ||
457 | ||
458 | /* this is for i2c-dev.c */ | |
459 | #define I2C_SLAVE 0x0703 /* Change slave address */ | |
460 | /* Attn.: Slave address is 7 or 10 bits */ | |
461 | #define I2C_SLAVE_FORCE 0x0706 /* Change slave address */ | |
462 | /* Attn.: Slave address is 7 or 10 bits */ | |
463 | /* This changes the address, even if it */ | |
464 | /* is already taken! */ | |
465 | #define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */ | |
466 | ||
467 | #define I2C_FUNCS 0x0705 /* Get the adapter functionality */ | |
468 | #define I2C_RDWR 0x0707 /* Combined R/W transfer (one stop only)*/ | |
469 | #define I2C_PEC 0x0708 /* != 0 for SMBus PEC */ | |
1da177e4 LT |
470 | |
471 | #define I2C_SMBUS 0x0720 /* SMBus-level access */ | |
472 | ||
1da177e4 | 473 | /* ----- I2C-DEV: char device interface stuff ------------------------- */ |
a1b9298e | 474 | #ifdef __KERNEL__ |
1da177e4 LT |
475 | |
476 | #define I2C_MAJOR 89 /* Device major number */ | |
477 | ||
478 | /* These defines are used for probing i2c client addresses */ | |
479 | /* The length of the option lists */ | |
480 | #define I2C_CLIENT_MAX_OPTS 48 | |
481 | ||
482 | /* Default fill of many variables */ | |
483 | #define I2C_CLIENT_DEFAULTS {I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ | |
484 | I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ | |
485 | I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ | |
486 | I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ | |
487 | I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ | |
488 | I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ | |
489 | I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ | |
490 | I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ | |
491 | I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ | |
492 | I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ | |
493 | I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ | |
494 | I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ | |
495 | I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ | |
496 | I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ | |
497 | I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ | |
498 | I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END} | |
499 | ||
500 | /* I2C_CLIENT_MODULE_PARM creates a module parameter, and puts it in the | |
501 | module header */ | |
502 | ||
503 | #define I2C_CLIENT_MODULE_PARM(var,desc) \ | |
504 | static unsigned short var[I2C_CLIENT_MAX_OPTS] = I2C_CLIENT_DEFAULTS; \ | |
505 | static unsigned int var##_num; \ | |
506 | module_param_array(var, short, &var##_num, 0); \ | |
507 | MODULE_PARM_DESC(var,desc) | |
508 | ||
f4b50261 JD |
509 | #define I2C_CLIENT_MODULE_PARM_FORCE(name) \ |
510 | I2C_CLIENT_MODULE_PARM(force_##name, \ | |
511 | "List of adapter,address pairs which are " \ | |
512 | "unquestionably assumed to contain a `" \ | |
513 | # name "' chip") | |
514 | ||
515 | ||
516 | #define I2C_CLIENT_INSMOD_COMMON \ | |
517 | I2C_CLIENT_MODULE_PARM(probe, "List of adapter,address pairs to scan " \ | |
518 | "additionally"); \ | |
519 | I2C_CLIENT_MODULE_PARM(ignore, "List of adapter,address pairs not to " \ | |
520 | "scan"); \ | |
521 | static struct i2c_client_address_data addr_data = { \ | |
522 | .normal_i2c = normal_i2c, \ | |
523 | .probe = probe, \ | |
524 | .ignore = ignore, \ | |
525 | .forces = forces, \ | |
526 | } | |
527 | ||
528 | /* These are the ones you want to use in your own drivers. Pick the one | |
529 | which matches the number of devices the driver differenciates between. */ | |
1da177e4 | 530 | #define I2C_CLIENT_INSMOD \ |
1da177e4 LT |
531 | I2C_CLIENT_MODULE_PARM(force, \ |
532 | "List of adapter,address pairs to boldly assume " \ | |
533 | "to be present"); \ | |
f4b50261 | 534 | static unsigned short *forces[] = { \ |
9fc6adfa JD |
535 | force, \ |
536 | NULL \ | |
537 | }; \ | |
f4b50261 JD |
538 | I2C_CLIENT_INSMOD_COMMON |
539 | ||
540 | #define I2C_CLIENT_INSMOD_1(chip1) \ | |
541 | enum chips { any_chip, chip1 }; \ | |
542 | I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \ | |
543 | "boldly assume to be present"); \ | |
544 | I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ | |
545 | static unsigned short *forces[] = { force, force_##chip1, NULL }; \ | |
546 | I2C_CLIENT_INSMOD_COMMON | |
547 | ||
548 | #define I2C_CLIENT_INSMOD_2(chip1, chip2) \ | |
549 | enum chips { any_chip, chip1, chip2 }; \ | |
550 | I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \ | |
551 | "boldly assume to be present"); \ | |
552 | I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ | |
553 | I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ | |
554 | static unsigned short *forces[] = { force, force_##chip1, \ | |
555 | force_##chip2, NULL }; \ | |
556 | I2C_CLIENT_INSMOD_COMMON | |
557 | ||
558 | #define I2C_CLIENT_INSMOD_3(chip1, chip2, chip3) \ | |
559 | enum chips { any_chip, chip1, chip2, chip3 }; \ | |
560 | I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \ | |
561 | "boldly assume to be present"); \ | |
562 | I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ | |
563 | I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ | |
564 | I2C_CLIENT_MODULE_PARM_FORCE(chip3); \ | |
565 | static unsigned short *forces[] = { force, force_##chip1, \ | |
566 | force_##chip2, force_##chip3, \ | |
567 | NULL }; \ | |
568 | I2C_CLIENT_INSMOD_COMMON | |
569 | ||
570 | #define I2C_CLIENT_INSMOD_4(chip1, chip2, chip3, chip4) \ | |
571 | enum chips { any_chip, chip1, chip2, chip3, chip4 }; \ | |
572 | I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \ | |
573 | "boldly assume to be present"); \ | |
574 | I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ | |
575 | I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ | |
576 | I2C_CLIENT_MODULE_PARM_FORCE(chip3); \ | |
577 | I2C_CLIENT_MODULE_PARM_FORCE(chip4); \ | |
578 | static unsigned short *forces[] = { force, force_##chip1, \ | |
579 | force_##chip2, force_##chip3, \ | |
580 | force_##chip4, NULL}; \ | |
581 | I2C_CLIENT_INSMOD_COMMON | |
582 | ||
583 | #define I2C_CLIENT_INSMOD_5(chip1, chip2, chip3, chip4, chip5) \ | |
584 | enum chips { any_chip, chip1, chip2, chip3, chip4, chip5 }; \ | |
585 | I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \ | |
586 | "boldly assume to be present"); \ | |
587 | I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ | |
588 | I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ | |
589 | I2C_CLIENT_MODULE_PARM_FORCE(chip3); \ | |
590 | I2C_CLIENT_MODULE_PARM_FORCE(chip4); \ | |
591 | I2C_CLIENT_MODULE_PARM_FORCE(chip5); \ | |
592 | static unsigned short *forces[] = { force, force_##chip1, \ | |
593 | force_##chip2, force_##chip3, \ | |
594 | force_##chip4, force_##chip5, \ | |
595 | NULL }; \ | |
596 | I2C_CLIENT_INSMOD_COMMON | |
597 | ||
598 | #define I2C_CLIENT_INSMOD_6(chip1, chip2, chip3, chip4, chip5, chip6) \ | |
599 | enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6 }; \ | |
600 | I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \ | |
601 | "boldly assume to be present"); \ | |
602 | I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ | |
603 | I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ | |
604 | I2C_CLIENT_MODULE_PARM_FORCE(chip3); \ | |
605 | I2C_CLIENT_MODULE_PARM_FORCE(chip4); \ | |
606 | I2C_CLIENT_MODULE_PARM_FORCE(chip5); \ | |
607 | I2C_CLIENT_MODULE_PARM_FORCE(chip6); \ | |
608 | static unsigned short *forces[] = { force, force_##chip1, \ | |
609 | force_##chip2, force_##chip3, \ | |
610 | force_##chip4, force_##chip5, \ | |
611 | force_##chip6, NULL }; \ | |
612 | I2C_CLIENT_INSMOD_COMMON | |
613 | ||
614 | #define I2C_CLIENT_INSMOD_7(chip1, chip2, chip3, chip4, chip5, chip6, chip7) \ | |
615 | enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, \ | |
616 | chip7 }; \ | |
617 | I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \ | |
618 | "boldly assume to be present"); \ | |
619 | I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ | |
620 | I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ | |
621 | I2C_CLIENT_MODULE_PARM_FORCE(chip3); \ | |
622 | I2C_CLIENT_MODULE_PARM_FORCE(chip4); \ | |
623 | I2C_CLIENT_MODULE_PARM_FORCE(chip5); \ | |
624 | I2C_CLIENT_MODULE_PARM_FORCE(chip6); \ | |
625 | I2C_CLIENT_MODULE_PARM_FORCE(chip7); \ | |
626 | static unsigned short *forces[] = { force, force_##chip1, \ | |
627 | force_##chip2, force_##chip3, \ | |
628 | force_##chip4, force_##chip5, \ | |
629 | force_##chip6, force_##chip7, \ | |
630 | NULL }; \ | |
631 | I2C_CLIENT_INSMOD_COMMON | |
632 | ||
633 | #define I2C_CLIENT_INSMOD_8(chip1, chip2, chip3, chip4, chip5, chip6, chip7, chip8) \ | |
634 | enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, \ | |
635 | chip7, chip8 }; \ | |
636 | I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \ | |
637 | "boldly assume to be present"); \ | |
638 | I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ | |
639 | I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ | |
640 | I2C_CLIENT_MODULE_PARM_FORCE(chip3); \ | |
641 | I2C_CLIENT_MODULE_PARM_FORCE(chip4); \ | |
642 | I2C_CLIENT_MODULE_PARM_FORCE(chip5); \ | |
643 | I2C_CLIENT_MODULE_PARM_FORCE(chip6); \ | |
644 | I2C_CLIENT_MODULE_PARM_FORCE(chip7); \ | |
645 | I2C_CLIENT_MODULE_PARM_FORCE(chip8); \ | |
646 | static unsigned short *forces[] = { force, force_##chip1, \ | |
647 | force_##chip2, force_##chip3, \ | |
648 | force_##chip4, force_##chip5, \ | |
649 | force_##chip6, force_##chip7, \ | |
650 | force_##chip8, NULL }; \ | |
651 | I2C_CLIENT_INSMOD_COMMON | |
a1b9298e | 652 | #endif /* __KERNEL__ */ |
1da177e4 | 653 | #endif /* _LINUX_I2C_H */ |