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/module.h>
  30 #include <linux/types.h>
  31 #include <linux/i2c-id.h>
  32 #include <linux/device.h>       /* for struct device */
  33 #include <asm/semaphore.h>
  34
  35 /* --- For i2c-isa ---------------------------------------------------- */
  36
  37 extern void i2c_adapter_dev_release(struct device *dev);
  38 extern struct device_driver i2c_adapter_driver;
  39 extern struct class i2c_adapter_class;
  40 extern struct bus_type i2c_bus_type;
  41
  42 /* --- General options ------------------------------------------------ */
  43
  44 struct i2c_msg;
  45 struct i2c_algorithm;
  46 struct i2c_adapter;
  47 struct i2c_client;
  48 struct i2c_driver;
  49 union i2c_smbus_data;
  50
  51 /*
  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.
  56  */
  57 extern int i2c_master_send(struct i2c_client *,const char* ,int);
  58 extern int i2c_master_recv(struct i2c_client *,char* ,int);
  59
  60 /* Transfer num messages.
  61  */
  62 extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num);
  63
  64 /*
  65  * Some adapter types (i.e. PCF 8584 based ones) may support slave behaviuor.
  66  * This is not tested/implemented yet and will change in the future.
  67  */
  68 extern int i2c_slave_send(struct i2c_client *,char*,int);
  69 extern int i2c_slave_recv(struct i2c_client *,char*,int);
  70
  71
  72
  73 /* This is the very generalized SMBus access routine. You probably do not
  74    want to use this, though; one of the functions below may be much easier,
  75    and probably just as fast.
  76    Note that we use i2c_adapter here, because you do not need a specific
  77    smbus adapter to call this function. */
  78 extern s32 i2c_smbus_xfer (struct i2c_adapter * adapter, u16 addr,
  79                            unsigned short flags,
  80                            char read_write, u8 command, int size,
  81                            union i2c_smbus_data * data);
  82
  83 /* Now follow the 'nice' access routines. These also document the calling
  84    conventions of smbus_access. */
  85
  86 extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value);
  87 extern s32 i2c_smbus_read_byte(struct i2c_client * client);
  88 extern s32 i2c_smbus_write_byte(struct i2c_client * client, u8 value);
  89 extern s32 i2c_smbus_read_byte_data(struct i2c_client * client, u8 command);
  90 extern s32 i2c_smbus_write_byte_data(struct i2c_client * client,
  91                                      u8 command, u8 value);
  92 extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);
  93 extern s32 i2c_smbus_write_word_data(struct i2c_client * client,
  94                                      u8 command, u16 value);
  95 extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
  96                                       u8 command, u8 length,
  97                                       u8 *values);
  98 /* Returns the number of read bytes */
  99 extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,
 100                                          u8 command, u8 *values);
 101
 102 /*
 103  * A driver is capable of handling one or more physical devices present on
 104  * I2C adapters. This information is used to inform the driver of adapter
 105  * events.
 106  */
 107
 108 struct i2c_driver {
 109         struct module *owner;
 110         char name[32];
 111         int id;
 112         unsigned int class;
 113         unsigned int flags;             /* div., see below              */
 114
 115         /* Notifies the driver that a new bus has appeared. This routine
 116          * can be used by the driver to test if the bus meets its conditions
 117          * & seek for the presence of the chip(s) it supports. If found, it
 118          * registers the client(s) that are on the bus to the i2c admin. via
 119          * i2c_attach_client.
 120          */
 121         int (*attach_adapter)(struct i2c_adapter *);
 122         int (*detach_adapter)(struct i2c_adapter *);
 123
 124         /* tells the driver that a client is about to be deleted & gives it
 125          * the chance to remove its private data. Also, if the client struct
 126          * has been dynamically allocated by the driver in the function above,
 127          * it must be freed here.
 128          */
 129         int (*detach_client)(struct i2c_client *);
 130
 131         /* a ioctl like command that can be used to perform specific functions
 132          * with the device.
 133          */
 134         int (*command)(struct i2c_client *client,unsigned int cmd, void *arg);
 135
 136         struct device_driver driver;
 137         struct list_head list;
 138 };
 139 #define to_i2c_driver(d) container_of(d, struct i2c_driver, driver)
 140
 141 #define I2C_NAME_SIZE   50
 142
 143 /*
 144  * i2c_client identifies a single device (i.e. chip) that is connected to an
 145  * i2c bus. The behaviour is defined by the routines of the driver. This
 146  * function is mainly used for lookup & other admin. functions.
 147  */
 148 struct i2c_client {
 149         unsigned int flags;             /* div., see below              */
 150         unsigned short addr;            /* chip address - NOTE: 7bit    */
 151                                         /* addresses are stored in the  */
 152                                         /* _LOWER_ 7 bits               */
 153         struct i2c_adapter *adapter;    /* the adapter we sit on        */
 154         struct i2c_driver *driver;      /* and our access routines      */
 155         int usage_count;                /* How many accesses currently  */
 156                                         /* to the client                */
 157         struct device dev;              /* the device structure         */
 158         struct list_head list;
 159         char name[I2C_NAME_SIZE];
 160         struct completion released;
 161 };
 162 #define to_i2c_client(d) container_of(d, struct i2c_client, dev)
 163
 164 static inline struct i2c_client *kobj_to_i2c_client(struct kobject *kobj)
 165 {
 166         return to_i2c_client(container_of(kobj, struct device, kobj));
 167 }
 168
 169 static inline void *i2c_get_clientdata (struct i2c_client *dev)
 170 {
 171         return dev_get_drvdata (&dev->dev);
 172 }
 173
 174 static inline void i2c_set_clientdata (struct i2c_client *dev, void *data)
 175 {
 176         dev_set_drvdata (&dev->dev, data);
 177 }
 178
 179 /*
 180  * The following structs are for those who like to implement new bus drivers:
 181  * i2c_algorithm is the interface to a class of hardware solutions which can
 182  * be addressed using the same bus algorithms - i.e. bit-banging or the PCF8584
 183  * to name two of the most common.
 184  */
 185 struct i2c_algorithm {
 186         /* If an adapter algorithm can't do I2C-level access, set master_xfer
 187            to NULL. If an adapter algorithm can do SMBus access, set
 188            smbus_xfer. If set to NULL, the SMBus protocol is simulated
 189            using common I2C messages */
 190         int (*master_xfer)(struct i2c_adapter *adap,struct i2c_msg *msgs,
 191                            int num);
 192         int (*smbus_xfer) (struct i2c_adapter *adap, u16 addr,
 193                            unsigned short flags, char read_write,
 194                            u8 command, int size, union i2c_smbus_data * data);
 195
 196         /* --- these optional/future use for some adapter types.*/
 197         int (*slave_send)(struct i2c_adapter *,char*,int);
 198         int (*slave_recv)(struct i2c_adapter *,char*,int);
 199
 200         /* --- ioctl like call to set div. parameters. */
 201         int (*algo_control)(struct i2c_adapter *, unsigned int, unsigned long);
 202
 203         /* To determine what the adapter supports */
 204         u32 (*functionality) (struct i2c_adapter *);
 205 };
 206
 207 /*
 208  * i2c_adapter is the structure used to identify a physical i2c bus along
 209  * with the access algorithms necessary to access it.
 210  */
 211 struct i2c_adapter {
 212         struct module *owner;
 213         unsigned int id;
 214         unsigned int class;
 215         struct i2c_algorithm *algo;/* the algorithm to access the bus   */
 216         void *algo_data;
 217
 218         /* --- administration stuff. */
 219         int (*client_register)(struct i2c_client *);
 220         int (*client_unregister)(struct i2c_client *);
 221
 222         /* data fields that are valid for all devices   */
 223         struct semaphore bus_lock;
 224         struct semaphore clist_lock;
 225
 226         int timeout;
 227         int retries;
 228         struct device dev;              /* the adapter device */
 229         struct class_device class_dev;  /* the class device */
 230
 231         int nr;
 232         struct list_head clients;
 233         struct list_head list;
 234         char name[I2C_NAME_SIZE];
 235         struct completion dev_released;
 236         struct completion class_dev_released;
 237 };
 238 #define dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev)
 239 #define class_dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, class_dev)
 240
 241 static inline void *i2c_get_adapdata (struct i2c_adapter *dev)
 242 {
 243         return dev_get_drvdata (&dev->dev);
 244 }
 245
 246 static inline void i2c_set_adapdata (struct i2c_adapter *dev, void *data)
 247 {
 248         dev_set_drvdata (&dev->dev, data);
 249 }
 250
 251 /*flags for the driver struct: */
 252 #define I2C_DF_NOTIFY   0x01            /* notify on bus (de/a)ttaches  */
 253 #if 0
 254 /* this flag is gone -- there is a (optional) driver->detach_adapter
 255  * callback now which can be used instead */
 256 # define I2C_DF_DUMMY   0x02
 257 #endif
 258
 259 /*flags for the client struct: */
 260 #define I2C_CLIENT_ALLOW_USE            0x01    /* Client allows access */
 261 #define I2C_CLIENT_ALLOW_MULTIPLE_USE   0x02    /* Allow multiple access-locks */
 262                                                 /* on an i2c_client */
 263 #define I2C_CLIENT_PEC  0x04                    /* Use Packet Error Checking */
 264 #define I2C_CLIENT_TEN  0x10                    /* we have a ten bit chip address       */
 265                                                 /* Must equal I2C_M_TEN below */
 266
 267 /* i2c adapter classes (bitmask) */
 268 #define I2C_CLASS_HWMON         (1<<0)  /* lm_sensors, ... */
 269 #define I2C_CLASS_TV_ANALOG     (1<<1)  /* bttv + friends */
 270 #define I2C_CLASS_TV_DIGITAL    (1<<2)  /* dvb cards */
 271 #define I2C_CLASS_DDC           (1<<3)  /* i2c-matroxfb ? */
 272 #define I2C_CLASS_CAM_ANALOG    (1<<4)  /* camera with analog CCD */
 273 #define I2C_CLASS_CAM_DIGITAL   (1<<5)  /* most webcams */
 274 #define I2C_CLASS_SOUND         (1<<6)  /* sound devices */
 275 #define I2C_CLASS_ALL           (UINT_MAX) /* all of the above */
 276
 277 /* i2c_client_address_data is the struct for holding default client
 278  * addresses for a driver and for the parameters supplied on the
 279  * command line
 280  */
 281 struct i2c_client_address_data {
 282         unsigned short *normal_i2c;
 283         unsigned short *probe;
 284         unsigned short *ignore;
 285         unsigned short **forces;
 286 };
 287
 288 /* Internal numbers to terminate lists */
 289 #define I2C_CLIENT_END          0xfffeU
 290
 291 /* The numbers to use to set I2C bus address */
 292 #define ANY_I2C_BUS             0xffff
 293 #define ANY_I2C_ISA_BUS         9191
 294
 295
 296 /* ----- functions exported by i2c.o */
 297
 298 /* administration...
 299  */
 300 extern int i2c_add_adapter(struct i2c_adapter *);
 301 extern int i2c_del_adapter(struct i2c_adapter *);
 302
 303 extern int i2c_add_driver(struct i2c_driver *);
 304 extern int i2c_del_driver(struct i2c_driver *);
 305
 306 extern int i2c_attach_client(struct i2c_client *);
 307 extern int i2c_detach_client(struct i2c_client *);
 308
 309 /* New function: This is to get an i2c_client-struct for controlling the
 310    client either by using i2c_control-function or having the
 311    client-module export functions that can be used with the i2c_client
 312    -struct. */
 313 extern struct i2c_client *i2c_get_client(int driver_id, int adapter_id,
 314                                         struct i2c_client *prev);
 315
 316 /* Should be used with new function
 317    extern struct i2c_client *i2c_get_client(int,int,struct i2c_client *);
 318    to make sure that client-struct is valid and that it is okay to access
 319    the i2c-client.
 320    returns -EACCES if client doesn't allow use (default)
 321    returns -EBUSY if client doesn't allow multiple use (default) and
 322    usage_count >0 */
 323 extern int i2c_use_client(struct i2c_client *);
 324 extern int i2c_release_client(struct i2c_client *);
 325
 326 /* call the i2c_client->command() of all attached clients with
 327  * the given arguments */
 328 extern void i2c_clients_command(struct i2c_adapter *adap,
 329                                 unsigned int cmd, void *arg);
 330
 331 /* returns -EBUSY if address has been taken, 0 if not. Note that the only
 332    other place at which this is called is within i2c_attach_client; so
 333    you can cheat by simply not registering. Not recommended, of course! */
 334 extern int i2c_check_addr (struct i2c_adapter *adapter, int addr);
 335
 336 /* Detect function. It iterates over all possible addresses itself.
 337  * It will only call found_proc if some client is connected at the
 338  * specific address (unless a 'force' matched);
 339  */
 340 extern int i2c_probe(struct i2c_adapter *adapter,
 341                 struct i2c_client_address_data *address_data,
 342                 int (*found_proc) (struct i2c_adapter *, int, int));
 343
 344 /* An ioctl like call to set div. parameters of the adapter.
 345  */
 346 extern int i2c_control(struct i2c_client *,unsigned int, unsigned long);
 347
 348 extern struct i2c_adapter* i2c_get_adapter(int id);
 349 extern void i2c_put_adapter(struct i2c_adapter *adap);
 350
 351
 352 /* Return the functionality mask */
 353 static inline u32 i2c_get_functionality(struct i2c_adapter *adap)
 354 {
 355         return adap->algo->functionality(adap);
 356 }
 357
 358 /* Return 1 if adapter supports everything we need, 0 if not. */
 359 static inline int i2c_check_functionality(struct i2c_adapter *adap, u32 func)
 360 {
 361         return (func & i2c_get_functionality(adap)) == func;
 362 }
 363
 364 /* Return id number for a specific adapter */
 365 static inline int i2c_adapter_id(struct i2c_adapter *adap)
 366 {
 367         return adap->nr;
 368 }
 369
 370 /*
 371  * I2C Message - used for pure i2c transaction, also from /dev interface
 372  */
 373 struct i2c_msg {
 374         __u16 addr;     /* slave address                        */
 375         __u16 flags;
 376 #define I2C_M_TEN       0x10    /* we have a ten bit chip address       */
 377 #define I2C_M_RD        0x01
 378 #define I2C_M_NOSTART   0x4000
 379 #define I2C_M_REV_DIR_ADDR      0x2000
 380 #define I2C_M_IGNORE_NAK        0x1000
 381 #define I2C_M_NO_RD_ACK         0x0800
 382         __u16 len;              /* msg length                           */
 383         __u8 *buf;              /* pointer to msg data                  */
 384 };
 385
 386 /* To determine what functionality is present */
 387
 388 #define I2C_FUNC_I2C                    0x00000001
 389 #define I2C_FUNC_10BIT_ADDR             0x00000002
 390 #define I2C_FUNC_PROTOCOL_MANGLING      0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
 391 #define I2C_FUNC_SMBUS_HWPEC_CALC       0x00000008 /* SMBus 2.0 */
 392 #define I2C_FUNC_SMBUS_BLOCK_PROC_CALL  0x00008000 /* SMBus 2.0 */
 393 #define I2C_FUNC_SMBUS_QUICK            0x00010000
 394 #define I2C_FUNC_SMBUS_READ_BYTE        0x00020000
 395 #define I2C_FUNC_SMBUS_WRITE_BYTE       0x00040000
 396 #define I2C_FUNC_SMBUS_READ_BYTE_DATA   0x00080000
 397 #define I2C_FUNC_SMBUS_WRITE_BYTE_DATA  0x00100000
 398 #define I2C_FUNC_SMBUS_READ_WORD_DATA   0x00200000
 399 #define I2C_FUNC_SMBUS_WRITE_WORD_DATA  0x00400000
 400 #define I2C_FUNC_SMBUS_PROC_CALL        0x00800000
 401 #define I2C_FUNC_SMBUS_READ_BLOCK_DATA  0x01000000
 402 #define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
 403 #define I2C_FUNC_SMBUS_READ_I2C_BLOCK   0x04000000 /* I2C-like block xfer  */
 404 #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK  0x08000000 /* w/ 1-byte reg. addr. */
 405 #define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2  0x10000000 /* I2C-like block xfer  */
 406 #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */
 407
 408 #define I2C_FUNC_SMBUS_BYTE (I2C_FUNC_SMBUS_READ_BYTE | \
 409                              I2C_FUNC_SMBUS_WRITE_BYTE)
 410 #define I2C_FUNC_SMBUS_BYTE_DATA (I2C_FUNC_SMBUS_READ_BYTE_DATA | \
 411                                   I2C_FUNC_SMBUS_WRITE_BYTE_DATA)
 412 #define I2C_FUNC_SMBUS_WORD_DATA (I2C_FUNC_SMBUS_READ_WORD_DATA | \
 413                                   I2C_FUNC_SMBUS_WRITE_WORD_DATA)
 414 #define I2C_FUNC_SMBUS_BLOCK_DATA (I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
 415                                    I2C_FUNC_SMBUS_WRITE_BLOCK_DATA)
 416 #define I2C_FUNC_SMBUS_I2C_BLOCK (I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
 417                                   I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)
 418 #define I2C_FUNC_SMBUS_I2C_BLOCK_2 (I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 | \
 419                                     I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2)
 420
 421 #define I2C_FUNC_SMBUS_EMUL (I2C_FUNC_SMBUS_QUICK | \
 422                              I2C_FUNC_SMBUS_BYTE | \
 423                              I2C_FUNC_SMBUS_BYTE_DATA | \
 424                              I2C_FUNC_SMBUS_WORD_DATA | \
 425                              I2C_FUNC_SMBUS_PROC_CALL | \
 426                              I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
 427                              I2C_FUNC_SMBUS_I2C_BLOCK)
 428
 429 /*
 430  * Data for SMBus Messages
 431  */
 432 #define I2C_SMBUS_BLOCK_MAX     32      /* As specified in SMBus standard */
 433 union i2c_smbus_data {
 434         __u8 byte;
 435         __u16 word;
 436         __u8 block[I2C_SMBUS_BLOCK_MAX + 2]; /* block[0] is used for length */
 437                                /* and one more for user-space compatibility */
 438 };
 439
 440 /* smbus_access read or write markers */
 441 #define I2C_SMBUS_READ  1
 442 #define I2C_SMBUS_WRITE 0
 443
 444 /* SMBus transaction types (size parameter in the above functions)
 445    Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
 446 #define I2C_SMBUS_QUICK             0
 447 #define I2C_SMBUS_BYTE              1
 448 #define I2C_SMBUS_BYTE_DATA         2
 449 #define I2C_SMBUS_WORD_DATA         3
 450 #define I2C_SMBUS_PROC_CALL         4
 451 #define I2C_SMBUS_BLOCK_DATA        5
 452 #define I2C_SMBUS_I2C_BLOCK_DATA    6
 453 #define I2C_SMBUS_BLOCK_PROC_CALL   7           /* SMBus 2.0 */
 454 #define I2C_SMBUS_BLOCK_DATA_PEC    8           /* SMBus 2.0 */
 455 #define I2C_SMBUS_PROC_CALL_PEC     9           /* SMBus 2.0 */
 456 #define I2C_SMBUS_BLOCK_PROC_CALL_PEC  10       /* SMBus 2.0 */
 457 #define I2C_SMBUS_WORD_DATA_PEC    11           /* SMBus 2.0 */
 458
 459
 460 /* ----- commands for the ioctl like i2c_command call:
 461  * note that additional calls are defined in the algorithm and hw
 462  *      dependent layers - these can be listed here, or see the
 463  *      corresponding header files.
 464  */
 465                                 /* -> bit-adapter specific ioctls       */
 466 #define I2C_RETRIES     0x0701  /* number of times a device address      */
 467                                 /* should be polled when not            */
 468                                 /* acknowledging                        */
 469 #define I2C_TIMEOUT     0x0702  /* set timeout - call with int          */
 470
 471
 472 /* this is for i2c-dev.c        */
 473 #define I2C_SLAVE       0x0703  /* Change slave address                 */
 474                                 /* Attn.: Slave address is 7 or 10 bits */
 475 #define I2C_SLAVE_FORCE 0x0706  /* Change slave address                 */
 476                                 /* Attn.: Slave address is 7 or 10 bits */
 477                                 /* This changes the address, even if it */
 478                                 /* is already taken!                    */
 479 #define I2C_TENBIT      0x0704  /* 0 for 7 bit addrs, != 0 for 10 bit   */
 480
 481 #define I2C_FUNCS       0x0705  /* Get the adapter functionality */
 482 #define I2C_RDWR        0x0707  /* Combined R/W transfer (one stop only)*/
 483 #define I2C_PEC         0x0708  /* != 0 for SMBus PEC                   */
 484
 485 #define I2C_SMBUS       0x0720  /* SMBus-level access */
 486
 487 /* ----- I2C-DEV: char device interface stuff ------------------------- */
 488
 489 #define I2C_MAJOR       89              /* Device major number          */
 490
 491 /* These defines are used for probing i2c client addresses */
 492 /* The length of the option lists */
 493 #define I2C_CLIENT_MAX_OPTS 48
 494
 495 /* Default fill of many variables */
 496 #define I2C_CLIENT_DEFAULTS {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                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 500                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 501                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 502                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 503                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 504                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 505                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 506                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 507                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 508                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 509                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 510                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
 511                           I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END}
 512
 513 /* I2C_CLIENT_MODULE_PARM creates a module parameter, and puts it in the
 514    module header */
 515
 516 #define I2C_CLIENT_MODULE_PARM(var,desc) \
 517   static unsigned short var[I2C_CLIENT_MAX_OPTS] = I2C_CLIENT_DEFAULTS; \
 518   static unsigned int var##_num; \
 519   module_param_array(var, short, &var##_num, 0); \
 520   MODULE_PARM_DESC(var,desc)
 521
 522 #define I2C_CLIENT_MODULE_PARM_FORCE(name)                              \
 523 I2C_CLIENT_MODULE_PARM(force_##name,                                    \
 524                        "List of adapter,address pairs which are "       \
 525                        "unquestionably assumed to contain a `"          \
 526                        # name "' chip")
 527
 528
 529 #define I2C_CLIENT_INSMOD_COMMON                                        \
 530 I2C_CLIENT_MODULE_PARM(probe, "List of adapter,address pairs to scan "  \
 531                        "additionally");                                 \
 532 I2C_CLIENT_MODULE_PARM(ignore, "List of adapter,address pairs not to "  \
 533                        "scan");                                         \
 534 static struct i2c_client_address_data addr_data = {                     \
 535         .normal_i2c     = normal_i2c,                                   \
 536         .probe          = probe,                                        \
 537         .ignore         = ignore,                                       \
 538         .forces         = forces,                                       \
 539 }
 540
 541 /* These are the ones you want to use in your own drivers. Pick the one
 542    which matches the number of devices the driver differenciates between. */
 543 #define I2C_CLIENT_INSMOD \
 544   I2C_CLIENT_MODULE_PARM(force, \
 545                       "List of adapter,address pairs to boldly assume " \
 546                       "to be present"); \
 547         static unsigned short *forces[] = {                             \
 548                         force,                                          \
 549                         NULL                                            \
 550                 };                                                      \
 551 I2C_CLIENT_INSMOD_COMMON
 552
 553 #define I2C_CLIENT_INSMOD_1(chip1)                                      \
 554 enum chips { any_chip, chip1 };                                         \
 555 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to "       \
 556                        "boldly assume to be present");                  \
 557 I2C_CLIENT_MODULE_PARM_FORCE(chip1);                                    \
 558 static unsigned short *forces[] = { force, force_##chip1, NULL };       \
 559 I2C_CLIENT_INSMOD_COMMON
 560
 561 #define I2C_CLIENT_INSMOD_2(chip1, chip2)                               \
 562 enum chips { any_chip, chip1, chip2 };                                  \
 563 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to "       \
 564                        "boldly assume to be present");                  \
 565 I2C_CLIENT_MODULE_PARM_FORCE(chip1);                                    \
 566 I2C_CLIENT_MODULE_PARM_FORCE(chip2);                                    \
 567 static unsigned short *forces[] = { force, force_##chip1,               \
 568                                     force_##chip2, NULL };              \
 569 I2C_CLIENT_INSMOD_COMMON
 570
 571 #define I2C_CLIENT_INSMOD_3(chip1, chip2, chip3)                        \
 572 enum chips { any_chip, chip1, chip2, chip3 };                           \
 573 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to "       \
 574                        "boldly assume to be present");                  \
 575 I2C_CLIENT_MODULE_PARM_FORCE(chip1);                                    \
 576 I2C_CLIENT_MODULE_PARM_FORCE(chip2);                                    \
 577 I2C_CLIENT_MODULE_PARM_FORCE(chip3);                                    \
 578 static unsigned short *forces[] = { force, force_##chip1,               \
 579                                     force_##chip2, force_##chip3,       \
 580                                     NULL };                             \
 581 I2C_CLIENT_INSMOD_COMMON
 582
 583 #define I2C_CLIENT_INSMOD_4(chip1, chip2, chip3, chip4)                 \
 584 enum chips { any_chip, chip1, chip2, chip3, chip4 };                    \
 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 static unsigned short *forces[] = { force, force_##chip1,               \
 592                                     force_##chip2, force_##chip3,       \
 593                                     force_##chip4, NULL};               \
 594 I2C_CLIENT_INSMOD_COMMON
 595
 596 #define I2C_CLIENT_INSMOD_5(chip1, chip2, chip3, chip4, chip5)          \
 597 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5 };             \
 598 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to "       \
 599                        "boldly assume to be present");                  \
 600 I2C_CLIENT_MODULE_PARM_FORCE(chip1);                                    \
 601 I2C_CLIENT_MODULE_PARM_FORCE(chip2);                                    \
 602 I2C_CLIENT_MODULE_PARM_FORCE(chip3);                                    \
 603 I2C_CLIENT_MODULE_PARM_FORCE(chip4);                                    \
 604 I2C_CLIENT_MODULE_PARM_FORCE(chip5);                                    \
 605 static unsigned short *forces[] = { force, force_##chip1,               \
 606                                     force_##chip2, force_##chip3,       \
 607                                     force_##chip4, force_##chip5,       \
 608                                     NULL };                             \
 609 I2C_CLIENT_INSMOD_COMMON
 610
 611 #define I2C_CLIENT_INSMOD_6(chip1, chip2, chip3, chip4, chip5, chip6)   \
 612 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6 };      \
 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 static unsigned short *forces[] = { force, force_##chip1,               \
 622                                     force_##chip2, force_##chip3,       \
 623                                     force_##chip4, force_##chip5,       \
 624                                     force_##chip6, NULL };              \
 625 I2C_CLIENT_INSMOD_COMMON
 626
 627 #define I2C_CLIENT_INSMOD_7(chip1, chip2, chip3, chip4, chip5, chip6, chip7) \
 628 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6,        \
 629              chip7 };                                                   \
 630 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to "       \
 631                        "boldly assume to be present");                  \
 632 I2C_CLIENT_MODULE_PARM_FORCE(chip1);                                    \
 633 I2C_CLIENT_MODULE_PARM_FORCE(chip2);                                    \
 634 I2C_CLIENT_MODULE_PARM_FORCE(chip3);                                    \
 635 I2C_CLIENT_MODULE_PARM_FORCE(chip4);                                    \
 636 I2C_CLIENT_MODULE_PARM_FORCE(chip5);                                    \
 637 I2C_CLIENT_MODULE_PARM_FORCE(chip6);                                    \
 638 I2C_CLIENT_MODULE_PARM_FORCE(chip7);                                    \
 639 static unsigned short *forces[] = { force, force_##chip1,               \
 640                                     force_##chip2, force_##chip3,       \
 641                                     force_##chip4, force_##chip5,       \
 642                                     force_##chip6, force_##chip7,       \
 643                                     NULL };                             \
 644 I2C_CLIENT_INSMOD_COMMON
 645
 646 #define I2C_CLIENT_INSMOD_8(chip1, chip2, chip3, chip4, chip5, chip6, chip7, chip8) \
 647 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6,        \
 648              chip7, chip8 };                                            \
 649 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to "       \
 650                        "boldly assume to be present");                  \
 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 I2C_CLIENT_MODULE_PARM_FORCE(chip5);                                    \
 656 I2C_CLIENT_MODULE_PARM_FORCE(chip6);                                    \
 657 I2C_CLIENT_MODULE_PARM_FORCE(chip7);                                    \
 658 I2C_CLIENT_MODULE_PARM_FORCE(chip8);                                    \
 659 static unsigned short *forces[] = { force, force_##chip1,               \
 660                                     force_##chip2, force_##chip3,       \
 661                                     force_##chip4, force_##chip5,       \
 662                                     force_##chip6, force_##chip7,       \
 663                                     force_##chip8, NULL };              \
 664 I2C_CLIENT_INSMOD_COMMON
 665
 666 #endif /* _LINUX_I2C_H */