1 /* ------------------------------------------------------------------------- */
3 /* i2c.h - definitions for the i2c-bus interface */
5 /* ------------------------------------------------------------------------- */
6 /* Copyright (C) 1995-2000 Simon G. Vogl
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
21 /* ------------------------------------------------------------------------- */
23 /* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and
24 Frodo Looijaard <frodol@dds.nl> */
29 #include <linux/types.h>
31 #include <linux/module.h>
32 #include <linux/i2c-id.h>
33 #include <linux/mod_devicetable.h>
34 #include <linux/device.h> /* for struct device */
35 #include <linux/sched.h> /* for completion */
36 #include <linux/mutex.h>
38 extern struct bus_type i2c_bus_type;
40 /* --- General options ------------------------------------------------ */
50 * The master routines are the ones normally used to transmit data to devices
51 * on a bus (or read from them). Apart from two basic transfer functions to
52 * transmit one message at a time, a more complex version can be used to
53 * transmit an arbitrary number of messages without interruption.
55 extern int i2c_master_send(struct i2c_client *,const char* ,int);
56 extern int i2c_master_recv(struct i2c_client *,char* ,int);
58 /* Transfer num messages.
60 extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num);
63 /* This is the very generalized SMBus access routine. You probably do not
64 want to use this, though; one of the functions below may be much easier,
65 and probably just as fast.
66 Note that we use i2c_adapter here, because you do not need a specific
67 smbus adapter to call this function. */
68 extern s32 i2c_smbus_xfer (struct i2c_adapter * adapter, u16 addr,
70 char read_write, u8 command, int size,
71 union i2c_smbus_data * data);
73 /* Now follow the 'nice' access routines. These also document the calling
74 conventions of i2c_smbus_xfer. */
76 extern s32 i2c_smbus_read_byte(struct i2c_client * client);
77 extern s32 i2c_smbus_write_byte(struct i2c_client * client, u8 value);
78 extern s32 i2c_smbus_read_byte_data(struct i2c_client * client, u8 command);
79 extern s32 i2c_smbus_write_byte_data(struct i2c_client * client,
80 u8 command, u8 value);
81 extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);
82 extern s32 i2c_smbus_write_word_data(struct i2c_client * client,
83 u8 command, u16 value);
84 /* Returns the number of read bytes */
85 extern s32 i2c_smbus_read_block_data(struct i2c_client *client,
86 u8 command, u8 *values);
87 extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
88 u8 command, u8 length,
90 /* Returns the number of read bytes */
91 extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,
92 u8 command, u8 length, u8 *values);
93 extern s32 i2c_smbus_write_i2c_block_data(struct i2c_client * client,
94 u8 command, u8 length,
98 * A driver is capable of handling one or more physical devices present on
99 * I2C adapters. This information is used to inform the driver of adapter
102 * The driver.owner field should be set to the module owner of this driver.
103 * The driver.name field should be set to the name of this driver.
110 /* Notifies the driver that a new bus has appeared. This routine
111 * can be used by the driver to test if the bus meets its conditions
112 * & seek for the presence of the chip(s) it supports. If found, it
113 * registers the client(s) that are on the bus to the i2c admin. via
114 * i2c_attach_client. (LEGACY I2C DRIVERS ONLY)
116 int (*attach_adapter)(struct i2c_adapter *);
117 int (*detach_adapter)(struct i2c_adapter *);
119 /* tells the driver that a client is about to be deleted & gives it
120 * the chance to remove its private data. Also, if the client struct
121 * has been dynamically allocated by the driver in the function above,
122 * it must be freed here. (LEGACY I2C DRIVERS ONLY)
124 int (*detach_client)(struct i2c_client *);
126 /* Standard driver model interfaces, for "new style" i2c drivers.
127 * With the driver model, device enumeration is NEVER done by drivers;
128 * it's done by infrastructure. (NEW STYLE DRIVERS ONLY)
130 int (*probe)(struct i2c_client *, const struct i2c_device_id *);
131 int (*remove)(struct i2c_client *);
133 /* driver model interfaces that don't relate to enumeration */
134 void (*shutdown)(struct i2c_client *);
135 int (*suspend)(struct i2c_client *, pm_message_t mesg);
136 int (*resume)(struct i2c_client *);
138 /* a ioctl like command that can be used to perform specific functions
141 int (*command)(struct i2c_client *client,unsigned int cmd, void *arg);
143 struct device_driver driver;
144 const struct i2c_device_id *id_table;
146 #define to_i2c_driver(d) container_of(d, struct i2c_driver, driver)
149 * struct i2c_client - represent an I2C slave device
150 * @flags: I2C_CLIENT_TEN indicates the device uses a ten bit chip address;
151 * I2C_CLIENT_PEC indicates it uses SMBus Packet Error Checking
152 * @addr: Address used on the I2C bus connected to the parent adapter.
153 * @name: Indicates the type of the device, usually a chip name that's
154 * generic enough to hide second-sourcing and compatible revisions.
155 * @adapter: manages the bus segment hosting this I2C device
156 * @driver: device's driver, hence pointer to access routines
157 * @dev: Driver model device node for the slave.
158 * @irq: indicates the IRQ generated by this device (if any)
159 * @list: list of active/busy clients (DEPRECATED)
160 * @released: used to synchronize client releases & detaches and references
162 * An i2c_client identifies a single device (i.e. chip) connected to an
163 * i2c bus. The behaviour exposed to Linux is defined by the driver
164 * managing the device.
167 unsigned short flags; /* div., see below */
168 unsigned short addr; /* chip address - NOTE: 7bit */
169 /* addresses are stored in the */
171 char name[I2C_NAME_SIZE];
172 struct i2c_adapter *adapter; /* the adapter we sit on */
173 struct i2c_driver *driver; /* and our access routines */
174 struct device dev; /* the device structure */
175 int irq; /* irq issued by device */
176 struct list_head list; /* DEPRECATED */
177 struct completion released;
179 #define to_i2c_client(d) container_of(d, struct i2c_client, dev)
181 extern struct i2c_client *i2c_verify_client(struct device *dev);
183 static inline struct i2c_client *kobj_to_i2c_client(struct kobject *kobj)
185 struct device * const dev = container_of(kobj, struct device, kobj);
186 return to_i2c_client(dev);
189 static inline void *i2c_get_clientdata (struct i2c_client *dev)
191 return dev_get_drvdata (&dev->dev);
194 static inline void i2c_set_clientdata (struct i2c_client *dev, void *data)
196 dev_set_drvdata (&dev->dev, data);
200 * struct i2c_board_info - template for device creation
201 * @type: chip type, to initialize i2c_client.name
202 * @flags: to initialize i2c_client.flags
203 * @addr: stored in i2c_client.addr
204 * @platform_data: stored in i2c_client.dev.platform_data
205 * @irq: stored in i2c_client.irq
207 * I2C doesn't actually support hardware probing, although controllers and
208 * devices may be able to use I2C_SMBUS_QUICK to tell whether or not there's
209 * a device at a given address. Drivers commonly need more information than
210 * that, such as chip type, configuration, associated IRQ, and so on.
212 * i2c_board_info is used to build tables of information listing I2C devices
213 * that are present. This information is used to grow the driver model tree
214 * for "new style" I2C drivers. For mainboards this is done statically using
215 * i2c_register_board_info(); bus numbers identify adapters that aren't
216 * yet available. For add-on boards, i2c_new_device() does this dynamically
217 * with the adapter already known.
219 struct i2c_board_info {
220 char type[I2C_NAME_SIZE];
221 unsigned short flags;
228 * I2C_BOARD_INFO - macro used to list an i2c device and its address
229 * @dev_type: identifies the device type
230 * @dev_addr: the device's address on the bus.
232 * This macro initializes essential fields of a struct i2c_board_info,
233 * declaring what has been provided on a particular board. Optional
234 * fields (such as associated irq, or device-specific platform_data)
235 * are provided using conventional syntax.
237 #define I2C_BOARD_INFO(dev_type,dev_addr) \
238 .type = (dev_type), .addr = (dev_addr)
241 /* Add-on boards should register/unregister their devices; e.g. a board
242 * with integrated I2C, a config eeprom, sensors, and a codec that's
243 * used in conjunction with the primary hardware.
245 extern struct i2c_client *
246 i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info);
248 /* If you don't know the exact address of an I2C device, use this variant
249 * instead, which can probe for device presence in a list of possible
252 extern struct i2c_client *
253 i2c_new_probed_device(struct i2c_adapter *adap,
254 struct i2c_board_info *info,
255 unsigned short const *addr_list);
257 /* For devices that use several addresses, use i2c_new_dummy() to make
258 * client handles for the extra addresses.
260 extern struct i2c_client *
261 i2c_new_dummy(struct i2c_adapter *adap, u16 address);
263 extern void i2c_unregister_device(struct i2c_client *);
265 /* Mainboard arch_initcall() code should register all its I2C devices.
266 * This is done at arch_initcall time, before declaring any i2c adapters.
267 * Modules for add-on boards must use other calls.
269 #ifdef CONFIG_I2C_BOARDINFO
271 i2c_register_board_info(int busnum, struct i2c_board_info const *info, unsigned n);
274 i2c_register_board_info(int busnum, struct i2c_board_info const *info, unsigned n)
281 * The following structs are for those who like to implement new bus drivers:
282 * i2c_algorithm is the interface to a class of hardware solutions which can
283 * be addressed using the same bus algorithms - i.e. bit-banging or the PCF8584
284 * to name two of the most common.
286 struct i2c_algorithm {
287 /* If an adapter algorithm can't do I2C-level access, set master_xfer
288 to NULL. If an adapter algorithm can do SMBus access, set
289 smbus_xfer. If set to NULL, the SMBus protocol is simulated
290 using common I2C messages */
291 /* master_xfer should return the number of messages successfully
292 processed, or a negative value on error */
293 int (*master_xfer)(struct i2c_adapter *adap,struct i2c_msg *msgs,
295 int (*smbus_xfer) (struct i2c_adapter *adap, u16 addr,
296 unsigned short flags, char read_write,
297 u8 command, int size, union i2c_smbus_data * data);
299 /* To determine what the adapter supports */
300 u32 (*functionality) (struct i2c_adapter *);
304 * i2c_adapter is the structure used to identify a physical i2c bus along
305 * with the access algorithms necessary to access it.
308 struct module *owner;
311 const struct i2c_algorithm *algo; /* the algorithm to access the bus */
314 /* --- administration stuff. */
315 int (*client_register)(struct i2c_client *);
316 int (*client_unregister)(struct i2c_client *);
318 /* data fields that are valid for all devices */
319 u8 level; /* nesting level for lockdep */
320 struct mutex bus_lock;
321 struct mutex clist_lock;
325 struct device dev; /* the adapter device */
328 struct list_head clients; /* DEPRECATED */
330 struct completion dev_released;
332 #define to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev)
334 static inline void *i2c_get_adapdata (struct i2c_adapter *dev)
336 return dev_get_drvdata (&dev->dev);
339 static inline void i2c_set_adapdata (struct i2c_adapter *dev, void *data)
341 dev_set_drvdata (&dev->dev, data);
344 /*flags for the client struct: */
345 #define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */
346 #define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */
347 /* Must equal I2C_M_TEN below */
348 #define I2C_CLIENT_WAKE 0x80 /* for board_info; true iff can wake */
350 /* i2c adapter classes (bitmask) */
351 #define I2C_CLASS_HWMON (1<<0) /* lm_sensors, ... */
352 #define I2C_CLASS_TV_ANALOG (1<<1) /* bttv + friends */
353 #define I2C_CLASS_TV_DIGITAL (1<<2) /* dvb cards */
354 #define I2C_CLASS_DDC (1<<3) /* DDC bus on graphics adapters */
355 #define I2C_CLASS_CAM_ANALOG (1<<4) /* camera with analog CCD */
356 #define I2C_CLASS_CAM_DIGITAL (1<<5) /* most webcams */
357 #define I2C_CLASS_SOUND (1<<6) /* sound devices */
358 #define I2C_CLASS_SPD (1<<7) /* SPD EEPROMs and similar */
359 #define I2C_CLASS_ALL (UINT_MAX) /* all of the above */
361 /* i2c_client_address_data is the struct for holding default client
362 * addresses for a driver and for the parameters supplied on the
365 struct i2c_client_address_data {
366 const unsigned short *normal_i2c;
367 const unsigned short *probe;
368 const unsigned short *ignore;
369 const unsigned short * const *forces;
372 /* Internal numbers to terminate lists */
373 #define I2C_CLIENT_END 0xfffeU
375 /* The numbers to use to set I2C bus address */
376 #define ANY_I2C_BUS 0xffff
379 /* ----- functions exported by i2c.o */
383 extern int i2c_add_adapter(struct i2c_adapter *);
384 extern int i2c_del_adapter(struct i2c_adapter *);
385 extern int i2c_add_numbered_adapter(struct i2c_adapter *);
387 extern int i2c_register_driver(struct module *, struct i2c_driver *);
388 extern void i2c_del_driver(struct i2c_driver *);
390 static inline int i2c_add_driver(struct i2c_driver *driver)
392 return i2c_register_driver(THIS_MODULE, driver);
395 extern int i2c_attach_client(struct i2c_client *);
396 extern int i2c_detach_client(struct i2c_client *);
398 extern struct i2c_client *i2c_use_client(struct i2c_client *client);
399 extern void i2c_release_client(struct i2c_client *client);
401 /* call the i2c_client->command() of all attached clients with
402 * the given arguments */
403 extern void i2c_clients_command(struct i2c_adapter *adap,
404 unsigned int cmd, void *arg);
406 /* Detect function. It iterates over all possible addresses itself.
407 * It will only call found_proc if some client is connected at the
408 * specific address (unless a 'force' matched);
410 extern int i2c_probe(struct i2c_adapter *adapter,
411 const struct i2c_client_address_data *address_data,
412 int (*found_proc) (struct i2c_adapter *, int, int));
414 extern struct i2c_adapter* i2c_get_adapter(int id);
415 extern void i2c_put_adapter(struct i2c_adapter *adap);
418 /* Return the functionality mask */
419 static inline u32 i2c_get_functionality(struct i2c_adapter *adap)
421 return adap->algo->functionality(adap);
424 /* Return 1 if adapter supports everything we need, 0 if not. */
425 static inline int i2c_check_functionality(struct i2c_adapter *adap, u32 func)
427 return (func & i2c_get_functionality(adap)) == func;
430 /* Return id number for a specific adapter */
431 static inline int i2c_adapter_id(struct i2c_adapter *adap)
435 #endif /* __KERNEL__ */
438 * struct i2c_msg - an I2C transaction segment beginning with START
439 * @addr: Slave address, either seven or ten bits. When this is a ten
440 * bit address, I2C_M_TEN must be set in @flags and the adapter
441 * must support I2C_FUNC_10BIT_ADDR.
442 * @flags: I2C_M_RD is handled by all adapters. No other flags may be
443 * provided unless the adapter exported the relevant I2C_FUNC_*
444 * flags through i2c_check_functionality().
445 * @len: Number of data bytes in @buf being read from or written to the
446 * I2C slave address. For read transactions where I2C_M_RECV_LEN
447 * is set, the caller guarantees that this buffer can hold up to
448 * 32 bytes in addition to the initial length byte sent by the
449 * slave (plus, if used, the SMBus PEC); and this value will be
450 * incremented by the number of block data bytes received.
451 * @buf: The buffer into which data is read, or from which it's written.
453 * An i2c_msg is the low level representation of one segment of an I2C
454 * transaction. It is visible to drivers in the @i2c_transfer() procedure,
455 * to userspace from i2c-dev, and to I2C adapter drivers through the
456 * @i2c_adapter.@master_xfer() method.
458 * Except when I2C "protocol mangling" is used, all I2C adapters implement
459 * the standard rules for I2C transactions. Each transaction begins with a
460 * START. That is followed by the slave address, and a bit encoding read
461 * versus write. Then follow all the data bytes, possibly including a byte
462 * with SMBus PEC. The transfer terminates with a NAK, or when all those
463 * bytes have been transferred and ACKed. If this is the last message in a
464 * group, it is followed by a STOP. Otherwise it is followed by the next
465 * @i2c_msg transaction segment, beginning with a (repeated) START.
467 * Alternatively, when the adapter supports I2C_FUNC_PROTOCOL_MANGLING then
468 * passing certain @flags may have changed those standard protocol behaviors.
469 * Those flags are only for use with broken/nonconforming slaves, and with
470 * adapters which are known to support the specific mangling options they
471 * need (one or more of IGNORE_NAK, NO_RD_ACK, NOSTART, and REV_DIR_ADDR).
474 __u16 addr; /* slave address */
476 #define I2C_M_TEN 0x0010 /* this is a ten bit chip address */
477 #define I2C_M_RD 0x0001 /* read data, from slave to master */
478 #define I2C_M_NOSTART 0x4000 /* if I2C_FUNC_PROTOCOL_MANGLING */
479 #define I2C_M_REV_DIR_ADDR 0x2000 /* if I2C_FUNC_PROTOCOL_MANGLING */
480 #define I2C_M_IGNORE_NAK 0x1000 /* if I2C_FUNC_PROTOCOL_MANGLING */
481 #define I2C_M_NO_RD_ACK 0x0800 /* if I2C_FUNC_PROTOCOL_MANGLING */
482 #define I2C_M_RECV_LEN 0x0400 /* length will be first received byte */
483 __u16 len; /* msg length */
484 __u8 *buf; /* pointer to msg data */
487 /* To determine what functionality is present */
489 #define I2C_FUNC_I2C 0x00000001
490 #define I2C_FUNC_10BIT_ADDR 0x00000002
491 #define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
492 #define I2C_FUNC_SMBUS_PEC 0x00000008
493 #define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */
494 #define I2C_FUNC_SMBUS_QUICK 0x00010000
495 #define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
496 #define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
497 #define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
498 #define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
499 #define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
500 #define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
501 #define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
502 #define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
503 #define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
504 #define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */
505 #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */
506 #define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 0x10000000 /* I2C-like block xfer */
507 #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */
509 #define I2C_FUNC_SMBUS_BYTE (I2C_FUNC_SMBUS_READ_BYTE | \
510 I2C_FUNC_SMBUS_WRITE_BYTE)
511 #define I2C_FUNC_SMBUS_BYTE_DATA (I2C_FUNC_SMBUS_READ_BYTE_DATA | \
512 I2C_FUNC_SMBUS_WRITE_BYTE_DATA)
513 #define I2C_FUNC_SMBUS_WORD_DATA (I2C_FUNC_SMBUS_READ_WORD_DATA | \
514 I2C_FUNC_SMBUS_WRITE_WORD_DATA)
515 #define I2C_FUNC_SMBUS_BLOCK_DATA (I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
516 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA)
517 #define I2C_FUNC_SMBUS_I2C_BLOCK (I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
518 I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)
519 #define I2C_FUNC_SMBUS_I2C_BLOCK_2 (I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 | \
520 I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2)
522 #define I2C_FUNC_SMBUS_EMUL (I2C_FUNC_SMBUS_QUICK | \
523 I2C_FUNC_SMBUS_BYTE | \
524 I2C_FUNC_SMBUS_BYTE_DATA | \
525 I2C_FUNC_SMBUS_WORD_DATA | \
526 I2C_FUNC_SMBUS_PROC_CALL | \
527 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
528 I2C_FUNC_SMBUS_I2C_BLOCK | \
532 * Data for SMBus Messages
534 #define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */
535 union i2c_smbus_data {
538 __u8 block[I2C_SMBUS_BLOCK_MAX + 2]; /* block[0] is used for length */
539 /* and one more for user-space compatibility */
542 /* i2c_smbus_xfer read or write markers */
543 #define I2C_SMBUS_READ 1
544 #define I2C_SMBUS_WRITE 0
546 /* SMBus transaction types (size parameter in the above functions)
547 Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
548 #define I2C_SMBUS_QUICK 0
549 #define I2C_SMBUS_BYTE 1
550 #define I2C_SMBUS_BYTE_DATA 2
551 #define I2C_SMBUS_WORD_DATA 3
552 #define I2C_SMBUS_PROC_CALL 4
553 #define I2C_SMBUS_BLOCK_DATA 5
554 #define I2C_SMBUS_I2C_BLOCK_BROKEN 6
555 #define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */
556 #define I2C_SMBUS_I2C_BLOCK_DATA 8
561 /* These defines are used for probing i2c client addresses */
562 /* The length of the option lists */
563 #define I2C_CLIENT_MAX_OPTS 48
565 /* Default fill of many variables */
566 #define I2C_CLIENT_DEFAULTS {I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
567 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
568 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
569 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
570 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
571 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
572 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
573 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
574 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
575 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
576 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
577 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
578 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
579 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
580 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
581 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END}
583 /* I2C_CLIENT_MODULE_PARM creates a module parameter, and puts it in the
586 #define I2C_CLIENT_MODULE_PARM(var,desc) \
587 static unsigned short var[I2C_CLIENT_MAX_OPTS] = I2C_CLIENT_DEFAULTS; \
588 static unsigned int var##_num; \
589 module_param_array(var, short, &var##_num, 0); \
590 MODULE_PARM_DESC(var,desc)
592 #define I2C_CLIENT_MODULE_PARM_FORCE(name) \
593 I2C_CLIENT_MODULE_PARM(force_##name, \
594 "List of adapter,address pairs which are " \
595 "unquestionably assumed to contain a `" \
599 #define I2C_CLIENT_INSMOD_COMMON \
600 I2C_CLIENT_MODULE_PARM(probe, "List of adapter,address pairs to scan " \
602 I2C_CLIENT_MODULE_PARM(ignore, "List of adapter,address pairs not to " \
604 static const struct i2c_client_address_data addr_data = { \
605 .normal_i2c = normal_i2c, \
611 #define I2C_CLIENT_FORCE_TEXT \
612 "List of adapter,address pairs to boldly assume to be present"
614 /* These are the ones you want to use in your own drivers. Pick the one
615 which matches the number of devices the driver differenciates between. */
616 #define I2C_CLIENT_INSMOD \
617 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
618 static const unsigned short * const forces[] = { force, NULL }; \
619 I2C_CLIENT_INSMOD_COMMON
621 #define I2C_CLIENT_INSMOD_1(chip1) \
622 enum chips { any_chip, chip1 }; \
623 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
624 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
625 static const unsigned short * const forces[] = { force, \
626 force_##chip1, NULL }; \
627 I2C_CLIENT_INSMOD_COMMON
629 #define I2C_CLIENT_INSMOD_2(chip1, chip2) \
630 enum chips { any_chip, chip1, chip2 }; \
631 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
632 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
633 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
634 static const unsigned short * const forces[] = { force, \
635 force_##chip1, force_##chip2, NULL }; \
636 I2C_CLIENT_INSMOD_COMMON
638 #define I2C_CLIENT_INSMOD_3(chip1, chip2, chip3) \
639 enum chips { any_chip, chip1, chip2, chip3 }; \
640 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
641 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
642 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
643 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
644 static const unsigned short * const forces[] = { force, \
645 force_##chip1, force_##chip2, force_##chip3, NULL }; \
646 I2C_CLIENT_INSMOD_COMMON
648 #define I2C_CLIENT_INSMOD_4(chip1, chip2, chip3, chip4) \
649 enum chips { any_chip, chip1, chip2, chip3, chip4 }; \
650 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
651 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
652 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
653 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
654 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
655 static const unsigned short * const forces[] = { force, \
656 force_##chip1, force_##chip2, force_##chip3, \
657 force_##chip4, NULL}; \
658 I2C_CLIENT_INSMOD_COMMON
660 #define I2C_CLIENT_INSMOD_5(chip1, chip2, chip3, chip4, chip5) \
661 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5 }; \
662 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
663 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
664 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
665 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
666 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
667 I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
668 static const unsigned short * const forces[] = { force, \
669 force_##chip1, force_##chip2, force_##chip3, \
670 force_##chip4, force_##chip5, NULL }; \
671 I2C_CLIENT_INSMOD_COMMON
673 #define I2C_CLIENT_INSMOD_6(chip1, chip2, chip3, chip4, chip5, chip6) \
674 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6 }; \
675 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
676 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
677 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
678 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
679 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
680 I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
681 I2C_CLIENT_MODULE_PARM_FORCE(chip6); \
682 static const unsigned short * const forces[] = { force, \
683 force_##chip1, force_##chip2, force_##chip3, \
684 force_##chip4, force_##chip5, force_##chip6, NULL }; \
685 I2C_CLIENT_INSMOD_COMMON
687 #define I2C_CLIENT_INSMOD_7(chip1, chip2, chip3, chip4, chip5, chip6, chip7) \
688 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, \
690 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
691 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
692 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
693 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
694 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
695 I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
696 I2C_CLIENT_MODULE_PARM_FORCE(chip6); \
697 I2C_CLIENT_MODULE_PARM_FORCE(chip7); \
698 static const unsigned short * const forces[] = { force, \
699 force_##chip1, force_##chip2, force_##chip3, \
700 force_##chip4, force_##chip5, force_##chip6, \
701 force_##chip7, NULL }; \
702 I2C_CLIENT_INSMOD_COMMON
704 #define I2C_CLIENT_INSMOD_8(chip1, chip2, chip3, chip4, chip5, chip6, chip7, chip8) \
705 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, \
707 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
708 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
709 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
710 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
711 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
712 I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
713 I2C_CLIENT_MODULE_PARM_FORCE(chip6); \
714 I2C_CLIENT_MODULE_PARM_FORCE(chip7); \
715 I2C_CLIENT_MODULE_PARM_FORCE(chip8); \
716 static const unsigned short * const forces[] = { force, \
717 force_##chip1, force_##chip2, force_##chip3, \
718 force_##chip4, force_##chip5, force_##chip6, \
719 force_##chip7, force_##chip8, NULL }; \
720 I2C_CLIENT_INSMOD_COMMON
721 #endif /* __KERNEL__ */
722 #endif /* _LINUX_I2C_H */