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 ------------------------------------------------ */
48 struct i2c_board_info;
50 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
52 * The master routines are the ones normally used to transmit data to devices
53 * on a bus (or read from them). Apart from two basic transfer functions to
54 * transmit one message at a time, a more complex version can be used to
55 * transmit an arbitrary number of messages without interruption.
57 extern int i2c_master_send(struct i2c_client *client, const char *buf,
59 extern int i2c_master_recv(struct i2c_client *client, char *buf, int count);
61 /* Transfer num messages.
63 extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
66 /* This is the very generalized SMBus access routine. You probably do not
67 want to use this, though; one of the functions below may be much easier,
68 and probably just as fast.
69 Note that we use i2c_adapter here, because you do not need a specific
70 smbus adapter to call this function. */
71 extern s32 i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr,
72 unsigned short flags, char read_write, u8 command,
73 int size, union i2c_smbus_data *data);
75 /* Now follow the 'nice' access routines. These also document the calling
76 conventions of i2c_smbus_xfer. */
78 extern s32 i2c_smbus_read_byte(struct i2c_client *client);
79 extern s32 i2c_smbus_write_byte(struct i2c_client *client, u8 value);
80 extern s32 i2c_smbus_read_byte_data(struct i2c_client *client, u8 command);
81 extern s32 i2c_smbus_write_byte_data(struct i2c_client *client,
82 u8 command, u8 value);
83 extern s32 i2c_smbus_read_word_data(struct i2c_client *client, u8 command);
84 extern s32 i2c_smbus_write_word_data(struct i2c_client *client,
85 u8 command, u16 value);
86 /* Returns the number of read bytes */
87 extern s32 i2c_smbus_read_block_data(struct i2c_client *client,
88 u8 command, u8 *values);
89 extern s32 i2c_smbus_write_block_data(struct i2c_client *client,
90 u8 command, u8 length, const u8 *values);
91 /* Returns the number of read bytes */
92 extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client *client,
93 u8 command, u8 length, u8 *values);
94 extern s32 i2c_smbus_write_i2c_block_data(struct i2c_client *client,
95 u8 command, u8 length,
100 * struct i2c_driver - represent an I2C device driver
101 * @id: Unique driver ID (optional)
102 * @class: What kind of i2c device we instantiate (for detect)
103 * @attach_adapter: Callback for bus addition (for legacy drivers)
104 * @detach_adapter: Callback for bus removal (for legacy drivers)
105 * @probe: Callback for device binding
106 * @remove: Callback for device unbinding
107 * @shutdown: Callback for device shutdown
108 * @suspend: Callback for device suspend
109 * @resume: Callback for device resume
110 * @command: Callback for bus-wide signaling (optional)
111 * @driver: Device driver model driver
112 * @id_table: List of I2C devices supported by this driver
113 * @detect: Callback for device detection
114 * @address_data: The I2C addresses to probe, ignore or force (for detect)
115 * @clients: List of detected clients we created (for i2c-core use only)
117 * The driver.owner field should be set to the module owner of this driver.
118 * The driver.name field should be set to the name of this driver.
120 * For automatic device detection, both @detect and @address_data must
121 * be defined. @class should also be set, otherwise only devices forced
122 * with module parameters will be created. The detect function must
123 * fill at least the name field of the i2c_board_info structure it is
124 * handed upon successful detection, and possibly also the flags field.
126 * If @detect is missing, the driver will still work fine for enumerated
127 * devices. Detected devices simply won't be supported. This is expected
128 * for the many I2C/SMBus devices which can't be detected reliably, and
129 * the ones which can always be enumerated in practice.
131 * The i2c_client structure which is handed to the @detect callback is
132 * not a real i2c_client. It is initialized just enough so that you can
133 * call i2c_smbus_read_byte_data and friends on it. Don't do anything
134 * else with it. In particular, calling dev_dbg and friends on it is
141 /* Notifies the driver that a new bus has appeared or is about to be
142 * removed. You should avoid using this if you can, it will probably
143 * be removed in a near future.
145 int (*attach_adapter)(struct i2c_adapter *);
146 int (*detach_adapter)(struct i2c_adapter *);
148 /* Standard driver model interfaces */
149 int (*probe)(struct i2c_client *, const struct i2c_device_id *);
150 int (*remove)(struct i2c_client *);
152 /* driver model interfaces that don't relate to enumeration */
153 void (*shutdown)(struct i2c_client *);
154 int (*suspend)(struct i2c_client *, pm_message_t mesg);
155 int (*resume)(struct i2c_client *);
157 /* a ioctl like command that can be used to perform specific functions
160 int (*command)(struct i2c_client *client, unsigned int cmd, void *arg);
162 struct device_driver driver;
163 const struct i2c_device_id *id_table;
165 /* Device detection callback for automatic device creation */
166 int (*detect)(struct i2c_client *, int kind, struct i2c_board_info *);
167 const struct i2c_client_address_data *address_data;
168 struct list_head clients;
170 #define to_i2c_driver(d) container_of(d, struct i2c_driver, driver)
173 * struct i2c_client - represent an I2C slave device
174 * @flags: I2C_CLIENT_TEN indicates the device uses a ten bit chip address;
175 * I2C_CLIENT_PEC indicates it uses SMBus Packet Error Checking
176 * @addr: Address used on the I2C bus connected to the parent adapter.
177 * @name: Indicates the type of the device, usually a chip name that's
178 * generic enough to hide second-sourcing and compatible revisions.
179 * @adapter: manages the bus segment hosting this I2C device
180 * @driver: device's driver, hence pointer to access routines
181 * @dev: Driver model device node for the slave.
182 * @irq: indicates the IRQ generated by this device (if any)
183 * @detected: member of an i2c_driver.clients list or i2c-core's
184 * userspace_devices list
186 * An i2c_client identifies a single device (i.e. chip) connected to an
187 * i2c bus. The behaviour exposed to Linux is defined by the driver
188 * managing the device.
191 unsigned short flags; /* div., see below */
192 unsigned short addr; /* chip address - NOTE: 7bit */
193 /* addresses are stored in the */
195 char name[I2C_NAME_SIZE];
196 struct i2c_adapter *adapter; /* the adapter we sit on */
197 struct i2c_driver *driver; /* and our access routines */
198 struct device dev; /* the device structure */
199 int irq; /* irq issued by device */
200 struct list_head detected;
202 #define to_i2c_client(d) container_of(d, struct i2c_client, dev)
204 extern struct i2c_client *i2c_verify_client(struct device *dev);
206 static inline struct i2c_client *kobj_to_i2c_client(struct kobject *kobj)
208 struct device * const dev = container_of(kobj, struct device, kobj);
209 return to_i2c_client(dev);
212 static inline void *i2c_get_clientdata(const struct i2c_client *dev)
214 return dev_get_drvdata(&dev->dev);
217 static inline void i2c_set_clientdata(struct i2c_client *dev, void *data)
219 dev_set_drvdata(&dev->dev, data);
223 * struct i2c_board_info - template for device creation
224 * @type: chip type, to initialize i2c_client.name
225 * @flags: to initialize i2c_client.flags
226 * @addr: stored in i2c_client.addr
227 * @platform_data: stored in i2c_client.dev.platform_data
228 * @archdata: copied into i2c_client.dev.archdata
229 * @irq: stored in i2c_client.irq
231 * I2C doesn't actually support hardware probing, although controllers and
232 * devices may be able to use I2C_SMBUS_QUICK to tell whether or not there's
233 * a device at a given address. Drivers commonly need more information than
234 * that, such as chip type, configuration, associated IRQ, and so on.
236 * i2c_board_info is used to build tables of information listing I2C devices
237 * that are present. This information is used to grow the driver model tree.
238 * For mainboards this is done statically using i2c_register_board_info();
239 * bus numbers identify adapters that aren't yet available. For add-on boards,
240 * i2c_new_device() does this dynamically with the adapter already known.
242 struct i2c_board_info {
243 char type[I2C_NAME_SIZE];
244 unsigned short flags;
247 struct dev_archdata *archdata;
252 * I2C_BOARD_INFO - macro used to list an i2c device and its address
253 * @dev_type: identifies the device type
254 * @dev_addr: the device's address on the bus.
256 * This macro initializes essential fields of a struct i2c_board_info,
257 * declaring what has been provided on a particular board. Optional
258 * fields (such as associated irq, or device-specific platform_data)
259 * are provided using conventional syntax.
261 #define I2C_BOARD_INFO(dev_type, dev_addr) \
262 .type = dev_type, .addr = (dev_addr)
265 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
266 /* Add-on boards should register/unregister their devices; e.g. a board
267 * with integrated I2C, a config eeprom, sensors, and a codec that's
268 * used in conjunction with the primary hardware.
270 extern struct i2c_client *
271 i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info);
273 /* If you don't know the exact address of an I2C device, use this variant
274 * instead, which can probe for device presence in a list of possible
277 extern struct i2c_client *
278 i2c_new_probed_device(struct i2c_adapter *adap,
279 struct i2c_board_info *info,
280 unsigned short const *addr_list);
282 /* For devices that use several addresses, use i2c_new_dummy() to make
283 * client handles for the extra addresses.
285 extern struct i2c_client *
286 i2c_new_dummy(struct i2c_adapter *adap, u16 address);
288 extern void i2c_unregister_device(struct i2c_client *);
291 /* Mainboard arch_initcall() code should register all its I2C devices.
292 * This is done at arch_initcall time, before declaring any i2c adapters.
293 * Modules for add-on boards must use other calls.
295 #ifdef CONFIG_I2C_BOARDINFO
297 i2c_register_board_info(int busnum, struct i2c_board_info const *info,
301 i2c_register_board_info(int busnum, struct i2c_board_info const *info,
306 #endif /* I2C_BOARDINFO */
309 * The following structs are for those who like to implement new bus drivers:
310 * i2c_algorithm is the interface to a class of hardware solutions which can
311 * be addressed using the same bus algorithms - i.e. bit-banging or the PCF8584
312 * to name two of the most common.
314 struct i2c_algorithm {
315 /* If an adapter algorithm can't do I2C-level access, set master_xfer
316 to NULL. If an adapter algorithm can do SMBus access, set
317 smbus_xfer. If set to NULL, the SMBus protocol is simulated
318 using common I2C messages */
319 /* master_xfer should return the number of messages successfully
320 processed, or a negative value on error */
321 int (*master_xfer)(struct i2c_adapter *adap, struct i2c_msg *msgs,
323 int (*smbus_xfer) (struct i2c_adapter *adap, u16 addr,
324 unsigned short flags, char read_write,
325 u8 command, int size, union i2c_smbus_data *data);
327 /* To determine what the adapter supports */
328 u32 (*functionality) (struct i2c_adapter *);
332 * i2c_adapter is the structure used to identify a physical i2c bus along
333 * with the access algorithms necessary to access it.
336 struct module *owner;
338 unsigned int class; /* classes to allow probing for */
339 const struct i2c_algorithm *algo; /* the algorithm to access the bus */
342 /* data fields that are valid for all devices */
343 u8 level; /* nesting level for lockdep */
344 struct mutex bus_lock;
346 int timeout; /* in jiffies */
348 struct device dev; /* the adapter device */
352 struct completion dev_released;
354 #define to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev)
356 static inline void *i2c_get_adapdata(const struct i2c_adapter *dev)
358 return dev_get_drvdata(&dev->dev);
361 static inline void i2c_set_adapdata(struct i2c_adapter *dev, void *data)
363 dev_set_drvdata(&dev->dev, data);
366 /*flags for the client struct: */
367 #define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */
368 #define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */
369 /* Must equal I2C_M_TEN below */
370 #define I2C_CLIENT_WAKE 0x80 /* for board_info; true iff can wake */
372 /* i2c adapter classes (bitmask) */
373 #define I2C_CLASS_HWMON (1<<0) /* lm_sensors, ... */
374 #define I2C_CLASS_TV_ANALOG (1<<1) /* bttv + friends */
375 #define I2C_CLASS_TV_DIGITAL (1<<2) /* dvb cards */
376 #define I2C_CLASS_DDC (1<<3) /* DDC bus on graphics adapters */
377 #define I2C_CLASS_SPD (1<<7) /* SPD EEPROMs and similar */
379 /* i2c_client_address_data is the struct for holding default client
380 * addresses for a driver and for the parameters supplied on the
383 struct i2c_client_address_data {
384 const unsigned short *normal_i2c;
385 const unsigned short *probe;
386 const unsigned short *ignore;
387 const unsigned short * const *forces;
390 /* Internal numbers to terminate lists */
391 #define I2C_CLIENT_END 0xfffeU
393 /* The numbers to use to set I2C bus address */
394 #define ANY_I2C_BUS 0xffff
396 /* Construct an I2C_CLIENT_END-terminated array of i2c addresses */
397 #define I2C_ADDRS(addr, addrs...) \
398 ((const unsigned short []){ addr, ## addrs, I2C_CLIENT_END })
401 /* ----- functions exported by i2c.o */
405 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
406 extern int i2c_add_adapter(struct i2c_adapter *);
407 extern int i2c_del_adapter(struct i2c_adapter *);
408 extern int i2c_add_numbered_adapter(struct i2c_adapter *);
410 extern int i2c_register_driver(struct module *, struct i2c_driver *);
411 extern void i2c_del_driver(struct i2c_driver *);
413 static inline int i2c_add_driver(struct i2c_driver *driver)
415 return i2c_register_driver(THIS_MODULE, driver);
418 extern struct i2c_client *i2c_use_client(struct i2c_client *client);
419 extern void i2c_release_client(struct i2c_client *client);
421 /* call the i2c_client->command() of all attached clients with
422 * the given arguments */
423 extern void i2c_clients_command(struct i2c_adapter *adap,
424 unsigned int cmd, void *arg);
426 extern struct i2c_adapter *i2c_get_adapter(int id);
427 extern void i2c_put_adapter(struct i2c_adapter *adap);
430 /* Return the functionality mask */
431 static inline u32 i2c_get_functionality(struct i2c_adapter *adap)
433 return adap->algo->functionality(adap);
436 /* Return 1 if adapter supports everything we need, 0 if not. */
437 static inline int i2c_check_functionality(struct i2c_adapter *adap, u32 func)
439 return (func & i2c_get_functionality(adap)) == func;
442 /* Return the adapter number for a specific adapter */
443 static inline int i2c_adapter_id(struct i2c_adapter *adap)
448 #endif /* __KERNEL__ */
451 * struct i2c_msg - an I2C transaction segment beginning with START
452 * @addr: Slave address, either seven or ten bits. When this is a ten
453 * bit address, I2C_M_TEN must be set in @flags and the adapter
454 * must support I2C_FUNC_10BIT_ADDR.
455 * @flags: I2C_M_RD is handled by all adapters. No other flags may be
456 * provided unless the adapter exported the relevant I2C_FUNC_*
457 * flags through i2c_check_functionality().
458 * @len: Number of data bytes in @buf being read from or written to the
459 * I2C slave address. For read transactions where I2C_M_RECV_LEN
460 * is set, the caller guarantees that this buffer can hold up to
461 * 32 bytes in addition to the initial length byte sent by the
462 * slave (plus, if used, the SMBus PEC); and this value will be
463 * incremented by the number of block data bytes received.
464 * @buf: The buffer into which data is read, or from which it's written.
466 * An i2c_msg is the low level representation of one segment of an I2C
467 * transaction. It is visible to drivers in the @i2c_transfer() procedure,
468 * to userspace from i2c-dev, and to I2C adapter drivers through the
469 * @i2c_adapter.@master_xfer() method.
471 * Except when I2C "protocol mangling" is used, all I2C adapters implement
472 * the standard rules for I2C transactions. Each transaction begins with a
473 * START. That is followed by the slave address, and a bit encoding read
474 * versus write. Then follow all the data bytes, possibly including a byte
475 * with SMBus PEC. The transfer terminates with a NAK, or when all those
476 * bytes have been transferred and ACKed. If this is the last message in a
477 * group, it is followed by a STOP. Otherwise it is followed by the next
478 * @i2c_msg transaction segment, beginning with a (repeated) START.
480 * Alternatively, when the adapter supports I2C_FUNC_PROTOCOL_MANGLING then
481 * passing certain @flags may have changed those standard protocol behaviors.
482 * Those flags are only for use with broken/nonconforming slaves, and with
483 * adapters which are known to support the specific mangling options they
484 * need (one or more of IGNORE_NAK, NO_RD_ACK, NOSTART, and REV_DIR_ADDR).
487 __u16 addr; /* slave address */
489 #define I2C_M_TEN 0x0010 /* this is a ten bit chip address */
490 #define I2C_M_RD 0x0001 /* read data, from slave to master */
491 #define I2C_M_NOSTART 0x4000 /* if I2C_FUNC_PROTOCOL_MANGLING */
492 #define I2C_M_REV_DIR_ADDR 0x2000 /* if I2C_FUNC_PROTOCOL_MANGLING */
493 #define I2C_M_IGNORE_NAK 0x1000 /* if I2C_FUNC_PROTOCOL_MANGLING */
494 #define I2C_M_NO_RD_ACK 0x0800 /* if I2C_FUNC_PROTOCOL_MANGLING */
495 #define I2C_M_RECV_LEN 0x0400 /* length will be first received byte */
496 __u16 len; /* msg length */
497 __u8 *buf; /* pointer to msg data */
500 /* To determine what functionality is present */
502 #define I2C_FUNC_I2C 0x00000001
503 #define I2C_FUNC_10BIT_ADDR 0x00000002
504 #define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_NOSTART etc. */
505 #define I2C_FUNC_SMBUS_PEC 0x00000008
506 #define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */
507 #define I2C_FUNC_SMBUS_QUICK 0x00010000
508 #define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
509 #define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
510 #define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
511 #define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
512 #define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
513 #define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
514 #define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
515 #define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
516 #define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
517 #define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */
518 #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */
520 #define I2C_FUNC_SMBUS_BYTE (I2C_FUNC_SMBUS_READ_BYTE | \
521 I2C_FUNC_SMBUS_WRITE_BYTE)
522 #define I2C_FUNC_SMBUS_BYTE_DATA (I2C_FUNC_SMBUS_READ_BYTE_DATA | \
523 I2C_FUNC_SMBUS_WRITE_BYTE_DATA)
524 #define I2C_FUNC_SMBUS_WORD_DATA (I2C_FUNC_SMBUS_READ_WORD_DATA | \
525 I2C_FUNC_SMBUS_WRITE_WORD_DATA)
526 #define I2C_FUNC_SMBUS_BLOCK_DATA (I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
527 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA)
528 #define I2C_FUNC_SMBUS_I2C_BLOCK (I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
529 I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)
531 #define I2C_FUNC_SMBUS_EMUL (I2C_FUNC_SMBUS_QUICK | \
532 I2C_FUNC_SMBUS_BYTE | \
533 I2C_FUNC_SMBUS_BYTE_DATA | \
534 I2C_FUNC_SMBUS_WORD_DATA | \
535 I2C_FUNC_SMBUS_PROC_CALL | \
536 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
537 I2C_FUNC_SMBUS_I2C_BLOCK | \
541 * Data for SMBus Messages
543 #define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */
544 union i2c_smbus_data {
547 __u8 block[I2C_SMBUS_BLOCK_MAX + 2]; /* block[0] is used for length */
548 /* and one more for user-space compatibility */
551 /* i2c_smbus_xfer read or write markers */
552 #define I2C_SMBUS_READ 1
553 #define I2C_SMBUS_WRITE 0
555 /* SMBus transaction types (size parameter in the above functions)
556 Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
557 #define I2C_SMBUS_QUICK 0
558 #define I2C_SMBUS_BYTE 1
559 #define I2C_SMBUS_BYTE_DATA 2
560 #define I2C_SMBUS_WORD_DATA 3
561 #define I2C_SMBUS_PROC_CALL 4
562 #define I2C_SMBUS_BLOCK_DATA 5
563 #define I2C_SMBUS_I2C_BLOCK_BROKEN 6
564 #define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */
565 #define I2C_SMBUS_I2C_BLOCK_DATA 8
570 /* These defines are used for probing i2c client addresses */
571 /* The length of the option lists */
572 #define I2C_CLIENT_MAX_OPTS 48
574 /* Default fill of many variables */
575 #define I2C_CLIENT_DEFAULTS {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, \
582 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
583 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
584 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
585 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
586 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
587 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
588 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
589 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
590 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END}
592 /* I2C_CLIENT_MODULE_PARM creates a module parameter, and puts it in the
595 #define I2C_CLIENT_MODULE_PARM(var,desc) \
596 static unsigned short var[I2C_CLIENT_MAX_OPTS] = I2C_CLIENT_DEFAULTS; \
597 static unsigned int var##_num; \
598 module_param_array(var, short, &var##_num, 0); \
599 MODULE_PARM_DESC(var, desc)
601 #define I2C_CLIENT_MODULE_PARM_FORCE(name) \
602 I2C_CLIENT_MODULE_PARM(force_##name, \
603 "List of adapter,address pairs which are " \
604 "unquestionably assumed to contain a `" \
608 #define I2C_CLIENT_INSMOD_COMMON \
609 I2C_CLIENT_MODULE_PARM(probe, "List of adapter,address pairs to scan " \
611 I2C_CLIENT_MODULE_PARM(ignore, "List of adapter,address pairs not to " \
613 static const struct i2c_client_address_data addr_data = { \
614 .normal_i2c = normal_i2c, \
620 #define I2C_CLIENT_FORCE_TEXT \
621 "List of adapter,address pairs to boldly assume to be present"
623 /* These are the ones you want to use in your own drivers. Pick the one
624 which matches the number of devices the driver differenciates between. */
625 #define I2C_CLIENT_INSMOD \
626 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
627 static const unsigned short * const forces[] = { force, NULL }; \
628 I2C_CLIENT_INSMOD_COMMON
630 #define I2C_CLIENT_INSMOD_1(chip1) \
631 enum chips { any_chip, chip1 }; \
632 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
633 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
634 static const unsigned short * const forces[] = { force, \
635 force_##chip1, NULL }; \
636 I2C_CLIENT_INSMOD_COMMON
638 #define I2C_CLIENT_INSMOD_2(chip1, chip2) \
639 enum chips { any_chip, chip1, chip2 }; \
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 static const unsigned short * const forces[] = { force, \
644 force_##chip1, force_##chip2, NULL }; \
645 I2C_CLIENT_INSMOD_COMMON
647 #define I2C_CLIENT_INSMOD_3(chip1, chip2, chip3) \
648 enum chips { any_chip, chip1, chip2, chip3 }; \
649 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
650 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
651 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
652 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
653 static const unsigned short * const forces[] = { force, \
654 force_##chip1, force_##chip2, force_##chip3, NULL }; \
655 I2C_CLIENT_INSMOD_COMMON
657 #define I2C_CLIENT_INSMOD_4(chip1, chip2, chip3, chip4) \
658 enum chips { any_chip, chip1, chip2, chip3, chip4 }; \
659 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
660 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
661 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
662 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
663 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
664 static const unsigned short * const forces[] = { force, \
665 force_##chip1, force_##chip2, force_##chip3, \
666 force_##chip4, NULL}; \
667 I2C_CLIENT_INSMOD_COMMON
669 #define I2C_CLIENT_INSMOD_5(chip1, chip2, chip3, chip4, chip5) \
670 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5 }; \
671 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
672 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
673 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
674 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
675 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
676 I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
677 static const unsigned short * const forces[] = { force, \
678 force_##chip1, force_##chip2, force_##chip3, \
679 force_##chip4, force_##chip5, NULL }; \
680 I2C_CLIENT_INSMOD_COMMON
682 #define I2C_CLIENT_INSMOD_6(chip1, chip2, chip3, chip4, chip5, chip6) \
683 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6 }; \
684 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
685 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
686 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
687 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
688 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
689 I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
690 I2C_CLIENT_MODULE_PARM_FORCE(chip6); \
691 static const unsigned short * const forces[] = { force, \
692 force_##chip1, force_##chip2, force_##chip3, \
693 force_##chip4, force_##chip5, force_##chip6, NULL }; \
694 I2C_CLIENT_INSMOD_COMMON
696 #define I2C_CLIENT_INSMOD_7(chip1, chip2, chip3, chip4, chip5, chip6, chip7) \
697 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, \
699 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
700 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
701 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
702 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
703 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
704 I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
705 I2C_CLIENT_MODULE_PARM_FORCE(chip6); \
706 I2C_CLIENT_MODULE_PARM_FORCE(chip7); \
707 static const unsigned short * const forces[] = { force, \
708 force_##chip1, force_##chip2, force_##chip3, \
709 force_##chip4, force_##chip5, force_##chip6, \
710 force_##chip7, NULL }; \
711 I2C_CLIENT_INSMOD_COMMON
713 #define I2C_CLIENT_INSMOD_8(chip1, chip2, chip3, chip4, chip5, chip6, chip7, chip8) \
714 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, \
716 I2C_CLIENT_MODULE_PARM(force, I2C_CLIENT_FORCE_TEXT); \
717 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
718 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
719 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
720 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
721 I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
722 I2C_CLIENT_MODULE_PARM_FORCE(chip6); \
723 I2C_CLIENT_MODULE_PARM_FORCE(chip7); \
724 I2C_CLIENT_MODULE_PARM_FORCE(chip8); \
725 static const unsigned short * const forces[] = { force, \
726 force_##chip1, force_##chip2, force_##chip3, \
727 force_##chip4, force_##chip5, force_##chip6, \
728 force_##chip7, force_##chip8, NULL }; \
729 I2C_CLIENT_INSMOD_COMMON
730 #endif /* __KERNEL__ */
731 #endif /* _LINUX_I2C_H */