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 <[email protected]> and 24 Frodo Looijaard <[email protected]> */ 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 extern struct bus_type i2c_bus_type; 39 40 /* --- General options ------------------------------------------------ */ 41 42 struct i2c_msg; 43 struct i2c_algorithm; 44 struct i2c_adapter; 45 struct i2c_client; 46 struct i2c_driver; 47 union i2c_smbus_data; 48 49 /* 50 * The master routines are the ones normally used to transmit data to devices 51 * on a bus (or read from them). Apart from two basic transfer functions to 52 * transmit one message at a time, a more complex version can be used to 53 * transmit an arbitrary number of messages without interruption. 54 */ 55 extern int i2c_master_send(struct i2c_client *,const char* ,int); 56 extern int i2c_master_recv(struct i2c_client *,char* ,int); 57 58 /* Transfer num messages. 59 */ 60 extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num); 61 62 63 /* This is the very generalized SMBus access routine. You probably do not 64 want to use this, though; one of the functions below may be much easier, 65 and probably just as fast. 66 Note that we use i2c_adapter here, because you do not need a specific 67 smbus adapter to call this function. */ 68 extern s32 i2c_smbus_xfer (struct i2c_adapter * adapter, u16 addr, 69 unsigned short flags, 70 char read_write, u8 command, int size, 71 union i2c_smbus_data * data); 72 73 /* Now follow the 'nice' access routines. These also document the calling 74 conventions of smbus_access. */ 75 76 extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value); 77 extern s32 i2c_smbus_read_byte(struct i2c_client * client); 78 extern s32 i2c_smbus_write_byte(struct i2c_client * client, u8 value); 79 extern s32 i2c_smbus_read_byte_data(struct i2c_client * client, u8 command); 80 extern s32 i2c_smbus_write_byte_data(struct i2c_client * client, 81 u8 command, u8 value); 82 extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command); 83 extern s32 i2c_smbus_write_word_data(struct i2c_client * client, 84 u8 command, u16 value); 85 /* Returns the number of read bytes */ 86 extern s32 i2c_smbus_read_block_data(struct i2c_client *client, 87 u8 command, u8 *values); 88 extern s32 i2c_smbus_write_block_data(struct i2c_client * client, 89 u8 command, u8 length, 90 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, 96 const u8 *values); 97 98 /* 99 * A driver is capable of handling one or more physical devices present on 100 * I2C adapters. This information is used to inform the driver of adapter 101 * events. 102 * 103 * The driver.owner field should be set to the module owner of this driver. 104 * The driver.name field should be set to the name of this driver. 105 */ 106 107 struct i2c_driver { 108 int id; 109 unsigned int class; 110 111 /* Notifies the driver that a new bus has appeared. This routine 112 * can be used by the driver to test if the bus meets its conditions 113 * & seek for the presence of the chip(s) it supports. If found, it 114 * registers the client(s) that are on the bus to the i2c admin. via 115 * i2c_attach_client. (LEGACY I2C DRIVERS ONLY) 116 */ 117 int (*attach_adapter)(struct i2c_adapter *); 118 int (*detach_adapter)(struct i2c_adapter *); 119 120 /* tells the driver that a client is about to be deleted & gives it 121 * the chance to remove its private data. Also, if the client struct 122 * has been dynamically allocated by the driver in the function above, 123 * it must be freed here. (LEGACY I2C DRIVERS ONLY) 124 */ 125 int (*detach_client)(struct i2c_client *); 126 127 /* Standard driver model interfaces, for "new style" i2c drivers. 128 * With the driver model, device enumeration is NEVER done by drivers; 129 * it's done by infrastructure. (NEW STYLE DRIVERS ONLY) 130 */ 131 int (*probe)(struct i2c_client *); 132 int (*remove)(struct i2c_client *); 133 134 /* driver model interfaces that don't relate to enumeration */ 135 void (*shutdown)(struct i2c_client *); 136 int (*suspend)(struct i2c_client *, pm_message_t mesg); 137 int (*resume)(struct i2c_client *); 138 139 /* a ioctl like command that can be used to perform specific functions 140 * with the device. 141 */ 142 int (*command)(struct i2c_client *client,unsigned int cmd, void *arg); 143 144 struct device_driver driver; 145 struct list_head list; 146 }; 147 #define to_i2c_driver(d) container_of(d, struct i2c_driver, driver) 148 149 #define I2C_NAME_SIZE 20 150 151 /** 152 * struct i2c_client - represent an I2C slave device 153 * @flags: I2C_CLIENT_TEN indicates the device uses a ten bit chip address; 154 * I2C_CLIENT_PEC indicates it uses SMBus Packet Error Checking 155 * @addr: Address used on the I2C bus connected to the parent adapter. 156 * @name: Indicates the type of the device, usually a chip name that's 157 * generic enough to hide second-sourcing and compatible revisions. 158 * @adapter: manages the bus segment hosting this I2C device 159 * @dev: Driver model device node for the slave. 160 * @irq: indicates the IRQ generated by this device (if any) 161 * @driver_name: Identifies new-style driver used with this device; also 162 * used as the module name for hotplug/coldplug modprobe support. 163 * 164 * An i2c_client identifies a single device (i.e. chip) connected to an 165 * i2c bus. The behaviour exposed to Linux is defined by the driver 166 * managing the device. 167 */ 168 struct i2c_client { 169 unsigned short flags; /* div., see below */ 170 unsigned short addr; /* chip address - NOTE: 7bit */ 171 /* addresses are stored in the */ 172 /* _LOWER_ 7 bits */ 173 char name[I2C_NAME_SIZE]; 174 struct i2c_adapter *adapter; /* the adapter we sit on */ 175 struct i2c_driver *driver; /* and our access routines */ 176 int usage_count; /* How many accesses currently */ 177 /* to the client */ 178 struct device dev; /* the device structure */ 179 int irq; /* irq issued by device (or -1) */ 180 char driver_name[KOBJ_NAME_LEN]; 181 struct list_head list; 182 struct completion released; 183 }; 184 #define to_i2c_client(d) container_of(d, struct i2c_client, dev) 185 186 static inline struct i2c_client *kobj_to_i2c_client(struct kobject *kobj) 187 { 188 struct device * const dev = container_of(kobj, struct device, kobj); 189 return to_i2c_client(dev); 190 } 191 192 static inline void *i2c_get_clientdata (struct i2c_client *dev) 193 { 194 return dev_get_drvdata (&dev->dev); 195 } 196 197 static inline void i2c_set_clientdata (struct i2c_client *dev, void *data) 198 { 199 dev_set_drvdata (&dev->dev, data); 200 } 201 202 /** 203 * struct i2c_board_info - template for device creation 204 * @driver_name: identifies the driver to be bound to the device 205 * @type: optional chip type information, to initialize i2c_client.name 206 * @flags: to initialize i2c_client.flags 207 * @addr: stored in i2c_client.addr 208 * @platform_data: stored in i2c_client.dev.platform_data 209 * @irq: stored in i2c_client.irq 210 * 211 * I2C doesn't actually support hardware probing, although controllers and 212 * devices may be able to use I2C_SMBUS_QUICK to tell whether or not there's 213 * a device at a given address. Drivers commonly need more information than 214 * that, such as chip type, configuration, associated IRQ, and so on. 215 * 216 * i2c_board_info is used to build tables of information listing I2C devices 217 * that are present. This information is used to grow the driver model tree 218 * for "new style" I2C drivers. For mainboards this is done statically using 219 * i2c_register_board_info(); bus numbers identify adapters that aren't 220 * yet available. For add-on boards, i2c_new_device() does this dynamically 221 * with the adapter already known. 222 */ 223 struct i2c_board_info { 224 char driver_name[KOBJ_NAME_LEN]; 225 char type[I2C_NAME_SIZE]; 226 unsigned short flags; 227 unsigned short addr; 228 void *platform_data; 229 int irq; 230 }; 231 232 /** 233 * I2C_BOARD_INFO - macro used to list an i2c device and its driver 234 * @driver: identifies the driver to use with the device 235 * @dev_addr: the device's address on the bus. 236 * 237 * This macro initializes essential fields of a struct i2c_board_info, 238 * declaring what has been provided on a particular board. Optional 239 * fields (such as the chip type, its associated irq, or device-specific 240 * platform_data) are provided using conventional syntax. 241 */ 242 #define I2C_BOARD_INFO(driver,dev_addr) \ 243 .driver_name = (driver), .addr = (dev_addr) 244 245 246 /* Add-on boards should register/unregister their devices; e.g. a board 247 * with integrated I2C, a config eeprom, sensors, and a codec that's 248 * used in conjunction with the primary hardware. 249 */ 250 extern struct i2c_client * 251 i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info); 252 253 /* If you don't know the exact address of an I2C device, use this variant 254 * instead, which can probe for device presence in a list of possible 255 * addresses. 256 */ 257 extern struct i2c_client * 258 i2c_new_probed_device(struct i2c_adapter *adap, 259 struct i2c_board_info *info, 260 unsigned short const *addr_list); 261 262 extern void i2c_unregister_device(struct i2c_client *); 263 264 /* Mainboard arch_initcall() code should register all its I2C devices. 265 * This is done at arch_initcall time, before declaring any i2c adapters. 266 * Modules for add-on boards must use other calls. 267 */ 268 extern int 269 i2c_register_board_info(int busnum, struct i2c_board_info const *info, unsigned n); 270 271 272 /* 273 * The following structs are for those who like to implement new bus drivers: 274 * i2c_algorithm is the interface to a class of hardware solutions which can 275 * be addressed using the same bus algorithms - i.e. bit-banging or the PCF8584 276 * to name two of the most common. 277 */ 278 struct i2c_algorithm { 279 /* If an adapter algorithm can't do I2C-level access, set master_xfer 280 to NULL. If an adapter algorithm can do SMBus access, set 281 smbus_xfer. If set to NULL, the SMBus protocol is simulated 282 using common I2C messages */ 283 /* master_xfer should return the number of messages successfully 284 processed, or a negative value on error */ 285 int (*master_xfer)(struct i2c_adapter *adap,struct i2c_msg *msgs, 286 int num); 287 int (*smbus_xfer) (struct i2c_adapter *adap, u16 addr, 288 unsigned short flags, char read_write, 289 u8 command, int size, union i2c_smbus_data * data); 290 291 /* --- ioctl like call to set div. parameters. */ 292 int (*algo_control)(struct i2c_adapter *, unsigned int, unsigned long); 293 294 /* To determine what the adapter supports */ 295 u32 (*functionality) (struct i2c_adapter *); 296 }; 297 298 /* 299 * i2c_adapter is the structure used to identify a physical i2c bus along 300 * with the access algorithms necessary to access it. 301 */ 302 struct i2c_adapter { 303 struct module *owner; 304 unsigned int id; 305 unsigned int class; 306 const struct i2c_algorithm *algo; /* the algorithm to access the bus */ 307 void *algo_data; 308 309 /* --- administration stuff. */ 310 int (*client_register)(struct i2c_client *); 311 int (*client_unregister)(struct i2c_client *); 312 313 /* data fields that are valid for all devices */ 314 u8 level; /* nesting level for lockdep */ 315 struct mutex bus_lock; 316 struct mutex clist_lock; 317 318 int timeout; 319 int retries; 320 struct device dev; /* the adapter device */ 321 322 int nr; 323 struct list_head clients; 324 struct list_head list; 325 char name[48]; 326 struct completion dev_released; 327 }; 328 #define to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev) 329 330 static inline void *i2c_get_adapdata (struct i2c_adapter *dev) 331 { 332 return dev_get_drvdata (&dev->dev); 333 } 334 335 static inline void i2c_set_adapdata (struct i2c_adapter *dev, void *data) 336 { 337 dev_set_drvdata (&dev->dev, data); 338 } 339 340 /*flags for the client struct: */ 341 #define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */ 342 #define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */ 343 /* Must equal I2C_M_TEN below */ 344 345 /* i2c adapter classes (bitmask) */ 346 #define I2C_CLASS_HWMON (1<<0) /* lm_sensors, ... */ 347 #define I2C_CLASS_TV_ANALOG (1<<1) /* bttv + friends */ 348 #define I2C_CLASS_TV_DIGITAL (1<<2) /* dvb cards */ 349 #define I2C_CLASS_DDC (1<<3) /* i2c-matroxfb ? */ 350 #define I2C_CLASS_CAM_ANALOG (1<<4) /* camera with analog CCD */ 351 #define I2C_CLASS_CAM_DIGITAL (1<<5) /* most webcams */ 352 #define I2C_CLASS_SOUND (1<<6) /* sound devices */ 353 #define I2C_CLASS_ALL (UINT_MAX) /* all of the above */ 354 355 /* i2c_client_address_data is the struct for holding default client 356 * addresses for a driver and for the parameters supplied on the 357 * command line 358 */ 359 struct i2c_client_address_data { 360 unsigned short *normal_i2c; 361 unsigned short *probe; 362 unsigned short *ignore; 363 unsigned short **forces; 364 }; 365 366 /* Internal numbers to terminate lists */ 367 #define I2C_CLIENT_END 0xfffeU 368 369 /* The numbers to use to set I2C bus address */ 370 #define ANY_I2C_BUS 0xffff 371 #define ANY_I2C_ISA_BUS 9191 372 373 374 /* ----- functions exported by i2c.o */ 375 376 /* administration... 377 */ 378 extern int i2c_add_adapter(struct i2c_adapter *); 379 extern int i2c_del_adapter(struct i2c_adapter *); 380 extern int i2c_add_numbered_adapter(struct i2c_adapter *); 381 382 extern int i2c_register_driver(struct module *, struct i2c_driver *); 383 extern void i2c_del_driver(struct i2c_driver *); 384 385 static inline int i2c_add_driver(struct i2c_driver *driver) 386 { 387 return i2c_register_driver(THIS_MODULE, driver); 388 } 389 390 extern int i2c_attach_client(struct i2c_client *); 391 extern int i2c_detach_client(struct i2c_client *); 392 393 /* Should be used to make sure that client-struct is valid and that it 394 is okay to access the i2c-client. 395 returns -ENODEV if client has gone in the meantime */ 396 extern int i2c_use_client(struct i2c_client *); 397 extern int i2c_release_client(struct i2c_client *); 398 399 /* call the i2c_client->command() of all attached clients with 400 * the given arguments */ 401 extern void i2c_clients_command(struct i2c_adapter *adap, 402 unsigned int cmd, void *arg); 403 404 /* returns -EBUSY if address has been taken, 0 if not. Note that the only 405 other place at which this is called is within i2c_attach_client; so 406 you can cheat by simply not registering. Not recommended, of course! */ 407 extern int i2c_check_addr (struct i2c_adapter *adapter, int addr); 408 409 /* Detect function. It iterates over all possible addresses itself. 410 * It will only call found_proc if some client is connected at the 411 * specific address (unless a 'force' matched); 412 */ 413 extern int i2c_probe(struct i2c_adapter *adapter, 414 struct i2c_client_address_data *address_data, 415 int (*found_proc) (struct i2c_adapter *, int, int)); 416 417 /* An ioctl like call to set div. parameters of the adapter. 418 */ 419 extern int i2c_control(struct i2c_client *,unsigned int, unsigned long); 420 421 extern struct i2c_adapter* i2c_get_adapter(int id); 422 extern void i2c_put_adapter(struct i2c_adapter *adap); 423 424 425 /* Return the functionality mask */ 426 static inline u32 i2c_get_functionality(struct i2c_adapter *adap) 427 { 428 return adap->algo->functionality(adap); 429 } 430 431 /* Return 1 if adapter supports everything we need, 0 if not. */ 432 static inline int i2c_check_functionality(struct i2c_adapter *adap, u32 func) 433 { 434 return (func & i2c_get_functionality(adap)) == func; 435 } 436 437 /* Return id number for a specific adapter */ 438 static inline int i2c_adapter_id(struct i2c_adapter *adap) 439 { 440 return adap->nr; 441 } 442 #endif /* __KERNEL__ */ 443 444 /* 445 * I2C Message - used for pure i2c transaction, also from /dev interface 446 */ 447 struct i2c_msg { 448 __u16 addr; /* slave address */ 449 __u16 flags; 450 #define I2C_M_TEN 0x10 /* we have a ten bit chip address */ 451 #define I2C_M_RD 0x01 452 #define I2C_M_NOSTART 0x4000 453 #define I2C_M_REV_DIR_ADDR 0x2000 454 #define I2C_M_IGNORE_NAK 0x1000 455 #define I2C_M_NO_RD_ACK 0x0800 456 #define I2C_M_RECV_LEN 0x0400 /* length will be first received byte */ 457 __u16 len; /* msg length */ 458 __u8 *buf; /* pointer to msg data */ 459 }; 460 461 /* To determine what functionality is present */ 462 463 #define I2C_FUNC_I2C 0x00000001 464 #define I2C_FUNC_10BIT_ADDR 0x00000002 465 #define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */ 466 #define I2C_FUNC_SMBUS_HWPEC_CALC 0x00000008 /* SMBus 2.0 */ 467 #define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */ 468 #define I2C_FUNC_SMBUS_QUICK 0x00010000 469 #define I2C_FUNC_SMBUS_READ_BYTE 0x00020000 470 #define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000 471 #define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000 472 #define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000 473 #define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000 474 #define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000 475 #define I2C_FUNC_SMBUS_PROC_CALL 0x00800000 476 #define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000 477 #define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000 478 #define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */ 479 #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */ 480 #define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 0x10000000 /* I2C-like block xfer */ 481 #define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */ 482 483 #define I2C_FUNC_SMBUS_BYTE (I2C_FUNC_SMBUS_READ_BYTE | \ 484 I2C_FUNC_SMBUS_WRITE_BYTE) 485 #define I2C_FUNC_SMBUS_BYTE_DATA (I2C_FUNC_SMBUS_READ_BYTE_DATA | \ 486 I2C_FUNC_SMBUS_WRITE_BYTE_DATA) 487 #define I2C_FUNC_SMBUS_WORD_DATA (I2C_FUNC_SMBUS_READ_WORD_DATA | \ 488 I2C_FUNC_SMBUS_WRITE_WORD_DATA) 489 #define I2C_FUNC_SMBUS_BLOCK_DATA (I2C_FUNC_SMBUS_READ_BLOCK_DATA | \ 490 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA) 491 #define I2C_FUNC_SMBUS_I2C_BLOCK (I2C_FUNC_SMBUS_READ_I2C_BLOCK | \ 492 I2C_FUNC_SMBUS_WRITE_I2C_BLOCK) 493 #define I2C_FUNC_SMBUS_I2C_BLOCK_2 (I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 | \ 494 I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2) 495 496 #define I2C_FUNC_SMBUS_EMUL (I2C_FUNC_SMBUS_QUICK | \ 497 I2C_FUNC_SMBUS_BYTE | \ 498 I2C_FUNC_SMBUS_BYTE_DATA | \ 499 I2C_FUNC_SMBUS_WORD_DATA | \ 500 I2C_FUNC_SMBUS_PROC_CALL | \ 501 I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \ 502 I2C_FUNC_SMBUS_I2C_BLOCK) 503 504 /* 505 * Data for SMBus Messages 506 */ 507 #define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */ 508 union i2c_smbus_data { 509 __u8 byte; 510 __u16 word; 511 __u8 block[I2C_SMBUS_BLOCK_MAX + 2]; /* block[0] is used for length */ 512 /* and one more for user-space compatibility */ 513 }; 514 515 /* smbus_access read or write markers */ 516 #define I2C_SMBUS_READ 1 517 #define I2C_SMBUS_WRITE 0 518 519 /* SMBus transaction types (size parameter in the above functions) 520 Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */ 521 #define I2C_SMBUS_QUICK 0 522 #define I2C_SMBUS_BYTE 1 523 #define I2C_SMBUS_BYTE_DATA 2 524 #define I2C_SMBUS_WORD_DATA 3 525 #define I2C_SMBUS_PROC_CALL 4 526 #define I2C_SMBUS_BLOCK_DATA 5 527 #define I2C_SMBUS_I2C_BLOCK_BROKEN 6 528 #define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */ 529 #define I2C_SMBUS_I2C_BLOCK_DATA 8 530 531 532 /* ----- commands for the ioctl like i2c_command call: 533 * note that additional calls are defined in the algorithm and hw 534 * dependent layers - these can be listed here, or see the 535 * corresponding header files. 536 */ 537 /* -> bit-adapter specific ioctls */ 538 #define I2C_RETRIES 0x0701 /* number of times a device address */ 539 /* should be polled when not */ 540 /* acknowledging */ 541 #define I2C_TIMEOUT 0x0702 /* set timeout - call with int */ 542 543 544 /* this is for i2c-dev.c */ 545 #define I2C_SLAVE 0x0703 /* Change slave address */ 546 /* Attn.: Slave address is 7 or 10 bits */ 547 #define I2C_SLAVE_FORCE 0x0706 /* Change slave address */ 548 /* Attn.: Slave address is 7 or 10 bits */ 549 /* This changes the address, even if it */ 550 /* is already taken! */ 551 #define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */ 552 553 #define I2C_FUNCS 0x0705 /* Get the adapter functionality */ 554 #define I2C_RDWR 0x0707 /* Combined R/W transfer (one stop only)*/ 555 #define I2C_PEC 0x0708 /* != 0 for SMBus PEC */ 556 557 #define I2C_SMBUS 0x0720 /* SMBus-level access */ 558 559 /* ----- I2C-DEV: char device interface stuff ------------------------- */ 560 #ifdef __KERNEL__ 561 562 #define I2C_MAJOR 89 /* Device major number */ 563 564 /* These defines are used for probing i2c client addresses */ 565 /* The length of the option lists */ 566 #define I2C_CLIENT_MAX_OPTS 48 567 568 /* Default fill of many variables */ 569 #define I2C_CLIENT_DEFAULTS {I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ 570 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ 571 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ 572 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ 573 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ 574 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ 575 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ 576 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ 577 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ 578 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ 579 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ 580 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ 581 I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \ 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} 585 586 /* I2C_CLIENT_MODULE_PARM creates a module parameter, and puts it in the 587 module header */ 588 589 #define I2C_CLIENT_MODULE_PARM(var,desc) \ 590 static unsigned short var[I2C_CLIENT_MAX_OPTS] = I2C_CLIENT_DEFAULTS; \ 591 static unsigned int var##_num; \ 592 module_param_array(var, short, &var##_num, 0); \ 593 MODULE_PARM_DESC(var,desc) 594 595 #define I2C_CLIENT_MODULE_PARM_FORCE(name) \ 596 I2C_CLIENT_MODULE_PARM(force_##name, \ 597 "List of adapter,address pairs which are " \ 598 "unquestionably assumed to contain a `" \ 599 # name "' chip") 600 601 602 #define I2C_CLIENT_INSMOD_COMMON \ 603 I2C_CLIENT_MODULE_PARM(probe, "List of adapter,address pairs to scan " \ 604 "additionally"); \ 605 I2C_CLIENT_MODULE_PARM(ignore, "List of adapter,address pairs not to " \ 606 "scan"); \ 607 static struct i2c_client_address_data addr_data = { \ 608 .normal_i2c = normal_i2c, \ 609 .probe = probe, \ 610 .ignore = ignore, \ 611 .forces = forces, \ 612 } 613 614 /* These are the ones you want to use in your own drivers. Pick the one 615 which matches the number of devices the driver differenciates between. */ 616 #define I2C_CLIENT_INSMOD \ 617 I2C_CLIENT_MODULE_PARM(force, \ 618 "List of adapter,address pairs to boldly assume " \ 619 "to be present"); \ 620 static unsigned short *forces[] = { \ 621 force, \ 622 NULL \ 623 }; \ 624 I2C_CLIENT_INSMOD_COMMON 625 626 #define I2C_CLIENT_INSMOD_1(chip1) \ 627 enum chips { any_chip, chip1 }; \ 628 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \ 629 "boldly assume to be present"); \ 630 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ 631 static unsigned short *forces[] = { force, force_##chip1, NULL }; \ 632 I2C_CLIENT_INSMOD_COMMON 633 634 #define I2C_CLIENT_INSMOD_2(chip1, chip2) \ 635 enum chips { any_chip, chip1, chip2 }; \ 636 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \ 637 "boldly assume to be present"); \ 638 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ 639 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ 640 static unsigned short *forces[] = { force, force_##chip1, \ 641 force_##chip2, NULL }; \ 642 I2C_CLIENT_INSMOD_COMMON 643 644 #define I2C_CLIENT_INSMOD_3(chip1, chip2, chip3) \ 645 enum chips { any_chip, chip1, chip2, chip3 }; \ 646 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \ 647 "boldly assume to be present"); \ 648 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ 649 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ 650 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \ 651 static unsigned short *forces[] = { force, force_##chip1, \ 652 force_##chip2, force_##chip3, \ 653 NULL }; \ 654 I2C_CLIENT_INSMOD_COMMON 655 656 #define I2C_CLIENT_INSMOD_4(chip1, chip2, chip3, chip4) \ 657 enum chips { any_chip, chip1, chip2, chip3, chip4 }; \ 658 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \ 659 "boldly assume to be present"); \ 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 unsigned short *forces[] = { force, force_##chip1, \ 665 force_##chip2, force_##chip3, \ 666 force_##chip4, NULL}; \ 667 I2C_CLIENT_INSMOD_COMMON 668 669 #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, "List of adapter,address pairs to " \ 672 "boldly assume to be present"); \ 673 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ 674 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ 675 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \ 676 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \ 677 I2C_CLIENT_MODULE_PARM_FORCE(chip5); \ 678 static unsigned short *forces[] = { force, force_##chip1, \ 679 force_##chip2, force_##chip3, \ 680 force_##chip4, force_##chip5, \ 681 NULL }; \ 682 I2C_CLIENT_INSMOD_COMMON 683 684 #define I2C_CLIENT_INSMOD_6(chip1, chip2, chip3, chip4, chip5, chip6) \ 685 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6 }; \ 686 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \ 687 "boldly assume to be present"); \ 688 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ 689 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ 690 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \ 691 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \ 692 I2C_CLIENT_MODULE_PARM_FORCE(chip5); \ 693 I2C_CLIENT_MODULE_PARM_FORCE(chip6); \ 694 static unsigned short *forces[] = { force, force_##chip1, \ 695 force_##chip2, force_##chip3, \ 696 force_##chip4, force_##chip5, \ 697 force_##chip6, NULL }; \ 698 I2C_CLIENT_INSMOD_COMMON 699 700 #define I2C_CLIENT_INSMOD_7(chip1, chip2, chip3, chip4, chip5, chip6, chip7) \ 701 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, \ 702 chip7 }; \ 703 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \ 704 "boldly assume to be present"); \ 705 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ 706 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ 707 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \ 708 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \ 709 I2C_CLIENT_MODULE_PARM_FORCE(chip5); \ 710 I2C_CLIENT_MODULE_PARM_FORCE(chip6); \ 711 I2C_CLIENT_MODULE_PARM_FORCE(chip7); \ 712 static unsigned short *forces[] = { force, force_##chip1, \ 713 force_##chip2, force_##chip3, \ 714 force_##chip4, force_##chip5, \ 715 force_##chip6, force_##chip7, \ 716 NULL }; \ 717 I2C_CLIENT_INSMOD_COMMON 718 719 #define I2C_CLIENT_INSMOD_8(chip1, chip2, chip3, chip4, chip5, chip6, chip7, chip8) \ 720 enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, \ 721 chip7, chip8 }; \ 722 I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \ 723 "boldly assume to be present"); \ 724 I2C_CLIENT_MODULE_PARM_FORCE(chip1); \ 725 I2C_CLIENT_MODULE_PARM_FORCE(chip2); \ 726 I2C_CLIENT_MODULE_PARM_FORCE(chip3); \ 727 I2C_CLIENT_MODULE_PARM_FORCE(chip4); \ 728 I2C_CLIENT_MODULE_PARM_FORCE(chip5); \ 729 I2C_CLIENT_MODULE_PARM_FORCE(chip6); \ 730 I2C_CLIENT_MODULE_PARM_FORCE(chip7); \ 731 I2C_CLIENT_MODULE_PARM_FORCE(chip8); \ 732 static unsigned short *forces[] = { force, force_##chip1, \ 733 force_##chip2, force_##chip3, \ 734 force_##chip4, force_##chip5, \ 735 force_##chip6, force_##chip7, \ 736 force_##chip8, NULL }; \ 737 I2C_CLIENT_INSMOD_COMMON 738 #endif /* __KERNEL__ */ 739 #endif /* _LINUX_I2C_H */ 740