include/linux/i2c.h

   1 /* ------------------------------------------------------------------------- */
   2 /*                                                                           */
   3 /* i2c.h - definitions for the i2c-bus interface                             */
   4 /*                                                                           */
   5 /* ------------------------------------------------------------------------- */
   6 /*   Copyright (C) 1995-2000 Simon G. Vogl
   7
   8     This program is free software; you can redistribute it and/or modify
   9     it under the terms of the GNU General Public License as published by
  10     the Free Software Foundation; either version 2 of the License, or
  11     (at your option) any later version.
  12
  13     This program is distributed in the hope that it will be useful,
  14     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16     GNU General Public License for more details.
  17
  18     You should have received a copy of the GNU General Public License
  19     along with this program; if not, write to the Free Software
  20     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                */
  21 /* ------------------------------------------------------------------------- */
  22
  23 /* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and
  24    Frodo Looijaard <frodol@dds.nl> */
  25
  26 #ifndef _LINUX_I2C_H
  27 #define _LINUX_I2C_H
  28
  29 #include <linux/types.h>
  30 #ifdef __KERNEL__
  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>
  37
  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
  45 /* --- General options ------------------------------------------------ */
  46
  47 struct i2c_msg;
  48 struct i2c_algorithm;
  49 struct i2c_adapter;
  50 struct i2c_client;
  51 struct i2c_driver;
  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 /* This is the very generalized SMBus access routine. You probably do not
  69    want to use this, though; one of the functions below may be much easier,
  70    and probably just as fast.
  71    Note that we use i2c_adapter here, because you do not need a specific
  72    smbus adapter to call this function. */
  73 extern s32 i2c_smbus_xfer (struct i2c_adapter * adapter, u16 addr,
  74                            unsigned short flags,
  75                            char read_write, u8 command, int size,
  76                            union i2c_smbus_data * data);
  77
  78 /* Now follow the 'nice' access routines. These also document the calling
  79    conventions of smbus_access. */
  80
  81 extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value);
  82 extern s32 i2c_smbus_read_byte(struct i2c_client * client);
  83 extern s32 i2c_smbus_write_byte(struct i2c_client * client, u8 value);
  84 extern s32 i2c_smbus_read_byte_data(struct i2c_client * client, u8 command);
  85 extern s32 i2c_smbus_write_byte_data(struct i2c_client * client,
  86                                      u8 command, u8 value);
  87 extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);
  88 extern s32 i2c_smbus_write_word_data(struct i2c_client * client,
  89                                      u8 command, u16 value);
  90 extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
  91                                       u8 command, u8 length,
  92                                       const u8 *values);
  93 /* Returns the number of read bytes */
  94 extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,
  95                                          u8 command, u8 *values);
  96 extern s32 i2c_smbus_write_i2c_block_data(struct i2c_client * client,
  97                                           u8 command, u8 length,
  98                                           const u8 *values);
  99
 100 /*
 101  * A driver is capable of handling one or more physical devices present on
 102  * I2C adapters. This information is used to inform the driver of adapter
 103  * events.
 104  *
 105  * The driver.owner field should be set to the module owner of this driver.
 106  * The driver.name field should be set to the name of this driver.
 107  */
 108
 109 struct i2c_driver {
 110         int id;
 111         unsigned int class;
 112
 113         /* Notifies the driver that a new bus has appeared. This routine
 114          * can be used by the driver to test if the bus meets its conditions
 115          * & seek for the presence of the chip(s) it supports. If found, it
 116          * registers the client(s) that are on the bus to the i2c admin. via
 117          * i2c_attach_client.
 118          */
 119         int (*attach_adapter)(struct i2c_adapter *);
 120         int (*detach_adapter)(struct i2c_adapter *);
 121
 122         /* tells the driver that a client is about to be deleted & gives it
 123          * the chance to remove its private data. Also, if the client struct
 124          * has been dynamically allocated by the driver in the function above,
 125          * it must be freed here.
 126          */
 127         int (*detach_client)(struct i2c_client *);
 128
 129         /* driver model interfaces that don't relate to enumeration  */
 130         void (*shutdown)(struct i2c_client *);
 131         int (*suspend)(struct i2c_client *, pm_message_t mesg);
 132         int (*resume)(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  */
 151 struct i2c_client {
 152         unsigned int flags;             /* div., see below              */
 153         unsigned short addr;            /* chip address - NOTE: 7bit    */
 154                                         /* addresses are stored in the  */
 155                                         /* _LOWER_ 7 bits               */
 156         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
 167 static 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
 172 static inline void *i2c_get_clientdata (struct i2c_client *dev)
 173 {
 174         return dev_get_drvdata (&dev->dev);
 175 }
 176
 177 static inline void i2c_set_clientdata (struct i2c_client *dev, void *data)
 178 {
 179         dev_set_drvdata (&dev->dev, data);
 180 }
 181
 182 /*
 183  * The following structs are for those who like to implement new bus drivers:
 184  * i2c_algorithm is the interface to a class of hardware solutions which can
 185  * be addressed using the same bus algorithms - i.e. bit-banging or the PCF8584
 186  * to name two of the most common.
 187  */
 188 struct i2c_algorithm {
 189         /* If an adapter algorithm can't do I2C-level access, set master_xfer
 190            to NULL. If an adapter algorithm can do SMBus access, set
 191            smbus_xfer. If set to NULL, the SMBus protocol is simulated
 192            using common I2C messages */
 193         /* master_xfer should return the number of messages successfully
 194            processed, or a negative value on error */
 195         int (*master_xfer)(struct i2c_adapter *adap,struct i2c_msg *msgs,
 196                            int num);
 197         int (*smbus_xfer) (struct i2c_adapter *adap, u16 addr,
 198                            unsigned short flags, char read_write,
 199                            u8 command, int size, union i2c_smbus_data * data);
 200
 201         /* --- ioctl like call to set div. parameters. */
 202         int (*algo_control)(struct i2c_adapter *, unsigned int, unsigned long);
 203
 204         /* To determine what the adapter supports */
 205         u32 (*functionality) (struct i2c_adapter *);
 206 };
 207
 208 /*
 209  * i2c_adapter is the structure used to identify a physical i2c bus along
 210  * with the access algorithms necessary to access it.
 211  */
 212 struct i2c_adapter {
 213         struct module *owner;
 214         unsigned int id;
 215         unsigned int class;
 216         const struct i2c_algorithm *algo; /* the algorithm to access the bus */
 217         void *algo_data;
 218
 219         /* --- administration stuff. */
 220         int (*client_register)(struct i2c_client *);
 221         int (*client_unregister)(struct i2c_client *);
 222
 223         /* data fields that are valid for all devices   */
 224         u8 level;                       /* nesting level for lockdep */
 225         struct mutex bus_lock;
 226         struct mutex clist_lock;
 227
 228         int timeout;
 229         int retries;
 230         struct device dev;              /* the adapter device */
 231         struct class_device class_dev;  /* the class device */
 232
 233         int nr;
 234         struct list_head clients;
 235         struct list_head list;
 236         char name[I2C_NAME_SIZE];
 237         struct completion dev_released;
 238         struct completion class_dev_released;
 239 };
 240 #define dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev)
 241 #define class_dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, class_dev)
 242
 243 static inline void *i2c_get_adapdata (struct i2c_adapter *dev)
 244 {
 245         return dev_get_drvdata (&dev->dev);
 246 }
 247
 248 static inline void i2c_set_adapdata (struct i2c_adapter *dev, void *data)
 249 {
 250         dev_set_drvdata (&dev->dev, data);
 251 }
 252
 253 /*flags for the client struct: */
 254 #define I2C_CLIENT_PEC  0x04                    /* Use Packet Error Checking */
 255 #define I2C_CLIENT_TEN  0x10                    /* we have a ten bit chip address       */
 256                                                 /* Must equal I2C_M_TEN below */
 257
 258 /* i2c adapter classes (bitmask) */
 259 #define I2C_CLASS_HWMON         (1<<0)  /* lm_sensors, ... */
 260 #define I2C_CLASS_TV_ANALOG     (1<<1)  /* bttv + friends */
 261 #define I2C_CLASS_TV_DIGITAL    (1<<2)  /* dvb cards */
 262 #define I2C_CLASS_DDC           (1<<3)  /* i2c-matroxfb ? */
 263 #define I2C_CLASS_CAM_ANALOG    (1<<4)  /* camera with analog CCD */
 264 #define I2C_CLASS_CAM_DIGITAL   (1<<5)  /* most webcams */
 265 #define I2C_CLASS_SOUND         (1<<6)  /* sound devices */
 266 #define I2C_CLASS_ALL           (UINT_MAX) /* all of the above */
 267
 268 /* i2c_client_address_data is the struct for holding default client
 269  * addresses for a driver and for the parameters supplied on the
 270  * command line
 271  */
 272 struct i2c_client_address_data {
 273         unsigned short *normal_i2c;
 274         unsigned short *probe;
 275         unsigned short *ignore;
 276         unsigned short **forces;
 277 };
 278
 279 /* Internal numbers to terminate lists */
 280 #define I2C_CLIENT_END          0xfffeU
 281
 282 /* The numbers to use to set I2C bus address */
 283 #define ANY_I2C_BUS             0xffff
 284 #define ANY_I2C_ISA_BUS         9191
 285
 286
 287 /* ----- functions exported by i2c.o */
 288
 289 /* administration...
 290  */
 291 extern int i2c_add_adapter(struct i2c_adapter *);
 292 extern int i2c_del_adapter(struct i2c_adapter *);
 293
 294 extern int i2c_register_driver(struct module *, struct i2c_driver *);
 295 extern int i2c_del_driver(struct i2c_driver *);
 296
 297 static inline int i2c_add_driver(struct i2c_driver *driver)
 298 {
 299         return i2c_register_driver(THIS_MODULE, driver);
 300 }
 301
 302 extern int i2c_attach_client(struct i2c_client *);
 303 extern int i2c_detach_client(struct i2c_client *);
 304
 305 /* Should be used to make sure that client-struct is valid and that it
 306    is okay to access the i2c-client.
 307    returns -ENODEV if client has gone in the meantime */
 308 extern int i2c_use_client(struct i2c_client *);
 309 extern int i2c_release_client(struct i2c_client *);
 310
 311 /* call the i2c_client->command() of all attached clients with
 312  * the given arguments */
 313 extern void i2c_clients_command(struct i2c_adapter *adap,
 314                                 unsigned int cmd, void *arg);
 315
 316 /* returns -EBUSY if address has been taken, 0 if not. Note that the only
 317    other place at which this is called is within i2c_attach_client; so
 318    you can cheat by simply not registering. Not recommended, of course! */
 319 extern int i2c_check_addr (struct i2c_adapter *adapter, int addr);
 320
 321 /* Detect function. It iterates over all possible addresses itself.
 322  * It will only call found_proc if some client is connected at the
 323  * specific address (unless a 'force' matched);
 324  */
 325 extern int i2c_probe(struct i2c_adapter *adapter,
 326                 struct i2c_client_address_data *address_data,
 327                 int (*found_proc) (struct i2c_adapter *, int, int));
 328
 329 /* An ioctl like call to set div. parameters of the adapter.
 330  */
 331 extern int i2c_control(struct i2c_client *,unsigned int, unsigned long);
 332
 333 extern struct i2c_adapter* i2c_get_adapter(int id);
 334 extern void i2c_put_adapter(struct i2c_adapter *adap);
 335
 336
 337 /* Return the functionality mask */
 338 static inline u32 i2c_get_functionality(struct i2c_adapter *adap)
 339 {
 340         return adap->algo->functionality(adap);
 341 }
 342
 343 /* Return 1 if adapter supports everything we need, 0 if not. */
 344 static inline int i2c_check_functionality(struct i2c_adapter *adap, u32 func)
 345 {
 346         return (func & i2c_get_functionality(adap)) == func;
 347 }
 348
 349 /* Return id number for a specific adapter */
 350 static inline int i2c_adapter_id(struct i2c_adapter *adap)
 351 {
 352         return adap->nr;
 353 }
 354 #endif /* __KERNEL__ */
 355
 356 /*
 357  * I2C Message - used for pure i2c transaction, also from /dev interface
 358  */
 359 struct i2c_msg {
 360         __u16 addr;     /* slave address                        */
 361         __u16 flags;
 362 #define I2C_M_TEN       0x10    /* we have a ten bit chip address       */
 363 #define I2C_M_RD        0x01
 364 #define I2C_M_NOSTART   0x4000
 365 #define I2C_M_REV_DIR_ADDR      0x2000
 366 #define I2C_M_IGNORE_NAK        0x1000
 367 #define I2C_M_NO_RD_ACK         0x0800
 368         __u16 len;              /* msg length                           */
 369         __u8 *buf;              /* pointer to msg data                  */
 370 };
 371
 372 /* To determine what functionality is present */
 373
 374 #define I2C_FUNC_I2C                    0x00000001
 375 #define I2C_FUNC_10BIT_ADDR             0x00000002
 376 #define I2C_FUNC_PROTOCOL_MANGLING      0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
 377 #define I2C_FUNC_SMBUS_HWPEC_CALC       0x00000008 /* SMBus 2.0 */
 378 #define I2C_FUNC_SMBUS_BLOCK_PROC_CALL  0x00008000 /* SMBus 2.0 */
 379 #define I2C_FUNC_SMBUS_QUICK            0x00010000
 380 #define I2C_FUNC_SMBUS_READ_BYTE        0x00020000
 381 #define I2C_FUNC_SMBUS_WRITE_BYTE       0x00040000
 382 #define I2C_FUNC_SMBUS_READ_BYTE_DATA   0x00080000
 383 #define I2C_FUNC_SMBUS_WRITE_BYTE_DATA  0x00100000
 384 #define I2C_FUNC_SMBUS_READ_WORD_DATA   0x00200000
 385 #define I2C_FUNC_SMBUS_WRITE_WORD_DATA  0x00400000
 386 #define I2C_FUNC_SMBUS_PROC_CALL        0x00800000
 387 #define I2C_FUNC_SMBUS_READ_BLOCK_DATA  0x01000000
 388 #define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
 389 #define I2C_FUNC_SMBUS_READ_I2C_BLOCK   0x04000000 /* I2C-like block xfer  */
 390 #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK  0x08000000 /* w/ 1-byte reg. addr. */
 391 #define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2  0x10000000 /* I2C-like block xfer  */
 392 #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */
 393
 394 #define I2C_FUNC_SMBUS_BYTE (I2C_FUNC_SMBUS_READ_BYTE | \
 395                              I2C_FUNC_SMBUS_WRITE_BYTE)
 396 #define I2C_FUNC_SMBUS_BYTE_DATA (I2C_FUNC_SMBUS_READ_BYTE_DATA | \
 397                                   I2C_FUNC_SMBUS_WRITE_BYTE_DATA)
 398 #define I2C_FUNC_SMBUS_WORD_DATA (I2C_FUNC_SMBUS_READ_WORD_DATA | \
 399                                   I2C_FUNC_SMBUS_WRITE_WORD_DATA)
 400 #define I2C_FUNC_SMBUS_BLOCK_DATA (I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
 401                                    I2C_FUNC_SMBUS_WRITE_BLOCK_DATA)
 402 #define I2C_FUNC_SMBUS_I2C_BLOCK (I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
 403                                   I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)
 404 #define I2C_FUNC_SMBUS_I2C_BLOCK_2 (I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 | \
 405                                     I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2)
 406
 407 #define I2C_FUNC_SMBUS_EMUL (I2C_FUNC_SMBUS_QUICK | \
 408                              I2C_FUNC_SMBUS_BYTE | \
 409                              I2C_FUNC_SMBUS_BYTE_DATA | \
 410                              I2C_FUNC_SMBUS_WORD_DATA | \
 411                              I2C_FUNC_SMBUS_PROC_CALL | \
 412                              I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
 413                              I2C_FUNC_SMBUS_I2C_BLOCK)
 414
 415 /*
 416  * Data for SMBus Messages
 417  */
 418 #define I2C_SMBUS_BLOCK_MAX     32      /* As specified in SMBus standard */
 419 union i2c_smbus_data {
 420         __u8 byte;
 421         __u16 word;
 422         __u8 block[I2C_SMBUS_BLOCK_MAX + 2]; /* block[0] is used for length */
 423                                /* and one more for user-space compatibility */
 424 };
 425
 426 /* smbus_access read or write markers */
 427 #define I2C_SMBUS_READ  1
 428 #define I2C_SMBUS_WRITE 0
 429
 430 /* SMBus transaction types (size parameter in the above functions)
 431    Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
 432 #define I2C_SMBUS_QUICK             0
 433 #define I2C_SMBUS_BYTE              1
 434 #define I2C_SMBUS_BYTE_DATA         2
 435 #define I2C_SMBUS_WORD_DATA         3
 436 #define I2C_SMBUS_PROC_CALL         4
 437 #define I2C_SMBUS_BLOCK_DATA        5
 438 #define I2C_SMBUS_I2C_BLOCK_DATA    6
 439 #define I2C_SMBUS_BLOCK_PROC_CALL   7           /* SMBus 2.0 */
 440
 441
 442 /* ----- commands for the ioctl like i2c_command call:
 443  * note that additional calls are defined in the algorithm and hw
 444  *      dependent layers - these can be listed here, or see the
 445  *      corresponding header files.
 446  */
 447                                 /* -> bit-adapter specific ioctls       */
 448 #define I2C_RETRIES     0x0701  /* number of times a device address      */
 449                                 /* should be polled when not            */
 450                                 /* acknowledging                        */
 451 #define I2C_TIMEOUT     0x0702  /* set timeout - call with int          */
 452
 453
 454 /* this is for i2c-dev.c        */
 455 #define I2C_SLAVE       0x0703  /* Change slave address                 */
 456                                 /* Attn.: Slave address is 7 or 10 bits */
 457 #define I2C_SLAVE_FORCE 0x0706  /* Change slave address                 */
 458                                 /* Attn.: Slave address is 7 or 10 bits */
 459                                 /* This changes the address, even if it */
 460                                 /* is already taken!                    */
 461 #define I2C_TENBIT      0x0704  /* 0 for 7 bit addrs, != 0 for 10 bit   */
 462
 463 #define I2C_FUNCS       0x0705  /* Get the adapter functionality */
 464 #define I2C_RDWR        0x0707  /* Combined R/W transfer (one stop only)*/
 465 #define I2C_PEC         0x0708  /* != 0 for SMBus PEC                   */
 466
 467 #define I2C_SMBUS       0x0720  /* SMBus-level access */
 468
 469 /* ----- I2C-DEV: char device interface stuff ------------------------- */
 470 #ifdef __KERNEL__
 471
 472 #define I2C_MAJOR       89              /* Device major number          */
 473
 474 /* These defines are used for probing i2c client addresses */
 475 /* The length of the option lists */
 476 #define I2C_CLIENT_MAX_OPTS 48
 477
 478 /* Default fill of many variables */
 479 #define I2C_CLIENT_DEFAULTS {I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 480                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 481                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 482                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 483                           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
 496 /* I2C_CLIENT_MODULE_PARM creates a module parameter, and puts it in the
 497    module header */
 498
 499 #define I2C_CLIENT_MODULE_PARM(var,desc) \
 500   static unsigned short var[I2C_CLIENT_MAX_OPTS] = I2C_CLIENT_DEFAULTS; \
 501   static unsigned int var##_num; \
 502   module_param_array(var, short, &var##_num, 0); \
 503   MODULE_PARM_DESC(var,desc)
 504
 505 #define I2C_CLIENT_MODULE_PARM_FORCE(name)                              \
 506 I2C_CLIENT_MODULE_PARM(force_##name,                                    \
 507                        "List of adapter,address pairs which are "       \
 508                        "unquestionably assumed to contain a `"          \
 509                        # name "' chip")
 510
 511
 512 #define I2C_CLIENT_INSMOD_COMMON                                        \
 513 I2C_CLIENT_MODULE_PARM(probe, "List of adapter,address pairs to scan "  \
 514                        "additionally");                                 \
 515 I2C_CLIENT_MODULE_PARM(ignore, "List of adapter,address pairs not to "  \
 516                        "scan");                                         \
 517 static struct i2c_client_address_data addr_data = {                     \
 518         .normal_i2c     = normal_i2c,                                   \
 519         .probe          = probe,                                        \
 520         .ignore         = ignore,                                       \
 521         .forces         = forces,                                       \
 522 }
 523
 524 /* These are the ones you want to use in your own drivers. Pick the one
 525    which matches the number of devices the driver differenciates between. */
 526 #define I2C_CLIENT_INSMOD \
 527   I2C_CLIENT_MODULE_PARM(force, \
 528                       "List of adapter,address pairs to boldly assume " \
 529                       "to be present"); \
 530         static unsigned short *forces[] = {                             \
 531                         force,                                          \
 532                         NULL                                            \
 533                 };                                                      \
 534 I2C_CLIENT_INSMOD_COMMON
 535
 536 #define I2C_CLIENT_INSMOD_1(chip1)                                      \
 537 enum chips { any_chip, chip1 };                                         \
 538 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to "       \
 539                        "boldly assume to be present");                  \
 540 I2C_CLIENT_MODULE_PARM_FORCE(chip1);                                    \
 541 static unsigned short *forces[] = { force, force_##chip1, NULL };       \
 542 I2C_CLIENT_INSMOD_COMMON
 543
 544 #define I2C_CLIENT_INSMOD_2(chip1, chip2)                               \
 545 enum chips { any_chip, chip1, chip2 };                                  \
 546 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to "       \
 547                        "boldly assume to be present");                  \
 548 I2C_CLIENT_MODULE_PARM_FORCE(chip1);                                    \
 549 I2C_CLIENT_MODULE_PARM_FORCE(chip2);                                    \
 550 static unsigned short *forces[] = { force, force_##chip1,               \
 551                                     force_##chip2, NULL };              \
 552 I2C_CLIENT_INSMOD_COMMON
 553
 554 #define I2C_CLIENT_INSMOD_3(chip1, chip2, chip3)                        \
 555 enum chips { any_chip, chip1, chip2, chip3 };                           \
 556 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to "       \
 557                        "boldly assume to be present");                  \
 558 I2C_CLIENT_MODULE_PARM_FORCE(chip1);                                    \
 559 I2C_CLIENT_MODULE_PARM_FORCE(chip2);                                    \
 560 I2C_CLIENT_MODULE_PARM_FORCE(chip3);                                    \
 561 static unsigned short *forces[] = { force, force_##chip1,               \
 562                                     force_##chip2, force_##chip3,       \
 563                                     NULL };                             \
 564 I2C_CLIENT_INSMOD_COMMON
 565
 566 #define I2C_CLIENT_INSMOD_4(chip1, chip2, chip3, chip4)                 \
 567 enum chips { any_chip, chip1, chip2, chip3, chip4 };                    \
 568 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to "       \
 569                        "boldly assume to be present");                  \
 570 I2C_CLIENT_MODULE_PARM_FORCE(chip1);                                    \
 571 I2C_CLIENT_MODULE_PARM_FORCE(chip2);                                    \
 572 I2C_CLIENT_MODULE_PARM_FORCE(chip3);                                    \
 573 I2C_CLIENT_MODULE_PARM_FORCE(chip4);                                    \
 574 static unsigned short *forces[] = { force, force_##chip1,               \
 575                                     force_##chip2, force_##chip3,       \
 576                                     force_##chip4, NULL};               \
 577 I2C_CLIENT_INSMOD_COMMON
 578
 579 #define I2C_CLIENT_INSMOD_5(chip1, chip2, chip3, chip4, chip5)          \
 580 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5 };             \
 581 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to "       \
 582                        "boldly assume to be present");                  \
 583 I2C_CLIENT_MODULE_PARM_FORCE(chip1);                                    \
 584 I2C_CLIENT_MODULE_PARM_FORCE(chip2);                                    \
 585 I2C_CLIENT_MODULE_PARM_FORCE(chip3);                                    \
 586 I2C_CLIENT_MODULE_PARM_FORCE(chip4);                                    \
 587 I2C_CLIENT_MODULE_PARM_FORCE(chip5);                                    \
 588 static unsigned short *forces[] = { force, force_##chip1,               \
 589                                     force_##chip2, force_##chip3,       \
 590                                     force_##chip4, force_##chip5,       \
 591                                     NULL };                             \
 592 I2C_CLIENT_INSMOD_COMMON
 593
 594 #define I2C_CLIENT_INSMOD_6(chip1, chip2, chip3, chip4, chip5, chip6)   \
 595 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6 };      \
 596 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to "       \
 597                        "boldly assume to be present");                  \
 598 I2C_CLIENT_MODULE_PARM_FORCE(chip1);                                    \
 599 I2C_CLIENT_MODULE_PARM_FORCE(chip2);                                    \
 600 I2C_CLIENT_MODULE_PARM_FORCE(chip3);                                    \
 601 I2C_CLIENT_MODULE_PARM_FORCE(chip4);                                    \
 602 I2C_CLIENT_MODULE_PARM_FORCE(chip5);                                    \
 603 I2C_CLIENT_MODULE_PARM_FORCE(chip6);                                    \
 604 static unsigned short *forces[] = { force, force_##chip1,               \
 605                                     force_##chip2, force_##chip3,       \
 606                                     force_##chip4, force_##chip5,       \
 607                                     force_##chip6, NULL };              \
 608 I2C_CLIENT_INSMOD_COMMON
 609
 610 #define I2C_CLIENT_INSMOD_7(chip1, chip2, chip3, chip4, chip5, chip6, chip7) \
 611 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6,        \
 612              chip7 };                                                   \
 613 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to "       \
 614                        "boldly assume to be present");                  \
 615 I2C_CLIENT_MODULE_PARM_FORCE(chip1);                                    \
 616 I2C_CLIENT_MODULE_PARM_FORCE(chip2);                                    \
 617 I2C_CLIENT_MODULE_PARM_FORCE(chip3);                                    \
 618 I2C_CLIENT_MODULE_PARM_FORCE(chip4);                                    \
 619 I2C_CLIENT_MODULE_PARM_FORCE(chip5);                                    \
 620 I2C_CLIENT_MODULE_PARM_FORCE(chip6);                                    \
 621 I2C_CLIENT_MODULE_PARM_FORCE(chip7);                                    \
 622 static unsigned short *forces[] = { force, force_##chip1,               \
 623                                     force_##chip2, force_##chip3,       \
 624                                     force_##chip4, force_##chip5,       \
 625                                     force_##chip6, force_##chip7,       \
 626                                     NULL };                             \
 627 I2C_CLIENT_INSMOD_COMMON
 628
 629 #define I2C_CLIENT_INSMOD_8(chip1, chip2, chip3, chip4, chip5, chip6, chip7, chip8) \
 630 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6,        \
 631              chip7, chip8 };                                            \
 632 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to "       \
 633                        "boldly assume to be present");                  \
 634 I2C_CLIENT_MODULE_PARM_FORCE(chip1);                                    \
 635 I2C_CLIENT_MODULE_PARM_FORCE(chip2);                                    \
 636 I2C_CLIENT_MODULE_PARM_FORCE(chip3);                                    \
 637 I2C_CLIENT_MODULE_PARM_FORCE(chip4);                                    \
 638 I2C_CLIENT_MODULE_PARM_FORCE(chip5);                                    \
 639 I2C_CLIENT_MODULE_PARM_FORCE(chip6);                                    \
 640 I2C_CLIENT_MODULE_PARM_FORCE(chip7);                                    \
 641 I2C_CLIENT_MODULE_PARM_FORCE(chip8);                                    \
 642 static unsigned short *forces[] = { force, force_##chip1,               \
 643                                     force_##chip2, force_##chip3,       \
 644                                     force_##chip4, force_##chip5,       \
 645                                     force_##chip6, force_##chip7,       \
 646                                     force_##chip8, NULL };              \
 647 I2C_CLIENT_INSMOD_COMMON
 648 #endif /* __KERNEL__ */
 649 #endif /* _LINUX_I2C_H */