/* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and
Frodo Looijaard <frodol@dds.nl> */
-/* $Id: i2c.h,v 1.68 2003/01/21 08:08:16 kmalkki Exp $ */
-
#ifndef _LINUX_I2C_H
#define _LINUX_I2C_H
#include <linux/module.h>
#include <linux/types.h>
#include <linux/i2c-id.h>
+#include <linux/mod_devicetable.h>
#include <linux/device.h> /* for struct device */
-#include <asm/semaphore.h>
+#include <linux/sched.h> /* for completion */
+#include <linux/mutex.h>
+
+/* --- For i2c-isa ---------------------------------------------------- */
+
+extern void i2c_adapter_dev_release(struct device *dev);
+extern struct device_driver i2c_adapter_driver;
+extern struct class i2c_adapter_class;
+extern struct bus_type i2c_bus_type;
/* --- General options ------------------------------------------------ */
struct i2c_adapter;
struct i2c_client;
struct i2c_driver;
-struct i2c_client_address_data;
union i2c_smbus_data;
/*
extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);
extern s32 i2c_smbus_write_word_data(struct i2c_client * client,
u8 command, u16 value);
-/* Returns the number of bytes transferred */
extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
u8 command, u8 length,
u8 *values);
+/* Returns the number of read bytes */
extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,
u8 command, u8 *values);
+extern s32 i2c_smbus_write_i2c_block_data(struct i2c_client * client,
+ u8 command, u8 length,
+ u8 *values);
/*
* A driver is capable of handling one or more physical devices present on
* I2C adapters. This information is used to inform the driver of adapter
* events.
+ *
+ * The driver.owner field should be set to the module owner of this driver.
+ * The driver.name field should be set to the name of this driver.
*/
struct i2c_driver {
- struct module *owner;
- char name[32];
int id;
unsigned int class;
- unsigned int flags; /* div., see below */
/* Notifies the driver that a new bus has appeared. This routine
* can be used by the driver to test if the bus meets its conditions
*/
struct i2c_client {
unsigned int flags; /* div., see below */
- unsigned int addr; /* chip address - NOTE: 7bit */
+ unsigned short addr; /* chip address - NOTE: 7bit */
/* addresses are stored in the */
- /* _LOWER_ 7 bits of this char */
- /* addr: unsigned int to make lm_sensors i2c-isa adapter work
- more cleanly. It does not take any more memory space, due to
- alignment considerations */
+ /* _LOWER_ 7 bits */
struct i2c_adapter *adapter; /* the adapter we sit on */
struct i2c_driver *driver; /* and our access routines */
int usage_count; /* How many accesses currently */
};
#define to_i2c_client(d) container_of(d, struct i2c_client, dev)
+static inline struct i2c_client *kobj_to_i2c_client(struct kobject *kobj)
+{
+ return to_i2c_client(container_of(kobj, struct device, kobj));
+}
+
static inline void *i2c_get_clientdata (struct i2c_client *dev)
{
return dev_get_drvdata (&dev->dev);
dev_set_drvdata (&dev->dev, data);
}
-#define I2C_DEVNAME(str) .name = str
-
-static inline char *i2c_clientname(struct i2c_client *c)
-{
- return &c->name[0];
-}
-
/*
* The following structs are for those who like to implement new bus drivers:
* i2c_algorithm is the interface to a class of hardware solutions which can
* to name two of the most common.
*/
struct i2c_algorithm {
- char name[32]; /* textual description */
- unsigned int id;
-
/* If an adapter algorithm can't do I2C-level access, set master_xfer
to NULL. If an adapter algorithm can do SMBus access, set
smbus_xfer. If set to NULL, the SMBus protocol is simulated
*/
struct i2c_adapter {
struct module *owner;
- unsigned int id;/* == is algo->id | hwdep.struct->id, */
- /* for registered values see below */
+ unsigned int id;
unsigned int class;
struct i2c_algorithm *algo;/* the algorithm to access the bus */
void *algo_data;
int (*client_unregister)(struct i2c_client *);
/* data fields that are valid for all devices */
- struct semaphore bus_lock;
- struct semaphore clist_lock;
+ struct mutex bus_lock;
+ struct mutex clist_lock;
int timeout;
int retries;
struct device dev; /* the adapter device */
struct class_device class_dev; /* the class device */
-#ifdef CONFIG_PROC_FS
- /* No need to set this when you initialize the adapter */
- int inode;
-#endif /* def CONFIG_PROC_FS */
-
int nr;
struct list_head clients;
struct list_head list;
dev_set_drvdata (&dev->dev, data);
}
-/*flags for the driver struct: */
-#define I2C_DF_NOTIFY 0x01 /* notify on bus (de/a)ttaches */
-#if 0
-/* this flag is gone -- there is a (optional) driver->detach_adapter
- * callback now which can be used instead */
-# define I2C_DF_DUMMY 0x02
-#endif
-
/*flags for the client struct: */
-#define I2C_CLIENT_ALLOW_USE 0x01 /* Client allows access */
-#define I2C_CLIENT_ALLOW_MULTIPLE_USE 0x02 /* Allow multiple access-locks */
- /* on an i2c_client */
#define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */
#define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */
/* Must equal I2C_M_TEN below */
*/
struct i2c_client_address_data {
unsigned short *normal_i2c;
- unsigned short *normal_i2c_range;
unsigned short *probe;
- unsigned short *probe_range;
unsigned short *ignore;
- unsigned short *ignore_range;
- unsigned short *force;
+ unsigned short **forces;
};
/* Internal numbers to terminate lists */
#define I2C_CLIENT_END 0xfffeU
-#define I2C_CLIENT_ISA_END 0xfffefffeU
/* The numbers to use to set I2C bus address */
#define ANY_I2C_BUS 0xffff
extern int i2c_add_adapter(struct i2c_adapter *);
extern int i2c_del_adapter(struct i2c_adapter *);
-extern int i2c_add_driver(struct i2c_driver *);
+extern int i2c_register_driver(struct module *, struct i2c_driver *);
extern int i2c_del_driver(struct i2c_driver *);
+static inline int i2c_add_driver(struct i2c_driver *driver)
+{
+ return i2c_register_driver(THIS_MODULE, driver);
+}
+
extern int i2c_attach_client(struct i2c_client *);
extern int i2c_detach_client(struct i2c_client *);
-/* New function: This is to get an i2c_client-struct for controlling the
- client either by using i2c_control-function or having the
- client-module export functions that can be used with the i2c_client
- -struct. */
-extern struct i2c_client *i2c_get_client(int driver_id, int adapter_id,
- struct i2c_client *prev);
-
-/* Should be used with new function
- extern struct i2c_client *i2c_get_client(int,int,struct i2c_client *);
- to make sure that client-struct is valid and that it is okay to access
- the i2c-client.
- returns -EACCES if client doesn't allow use (default)
- returns -EBUSY if client doesn't allow multiple use (default) and
- usage_count >0 */
+/* Should be used to make sure that client-struct is valid and that it
+ is okay to access the i2c-client.
+ returns -ENODEV if client has gone in the meantime */
extern int i2c_use_client(struct i2c_client *);
extern int i2c_release_client(struct i2c_client *);
*/
extern int i2c_control(struct i2c_client *,unsigned int, unsigned long);
-/* This call returns a unique low identifier for each registered adapter,
- * or -1 if the adapter was not registered.
- */
-extern int i2c_adapter_id(struct i2c_adapter *adap);
extern struct i2c_adapter* i2c_get_adapter(int id);
extern void i2c_put_adapter(struct i2c_adapter *adap);
return (func & i2c_get_functionality(adap)) == func;
}
+/* Return id number for a specific adapter */
+static inline int i2c_adapter_id(struct i2c_adapter *adap)
+{
+ return adap->nr;
+}
+
/*
* I2C Message - used for pure i2c transaction, also from /dev interface
*/
#define I2C_FUNC_10BIT_ADDR 0x00000002
#define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
#define I2C_FUNC_SMBUS_HWPEC_CALC 0x00000008 /* SMBus 2.0 */
-#define I2C_FUNC_SMBUS_READ_WORD_DATA_PEC 0x00000800 /* SMBus 2.0 */
-#define I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC 0x00001000 /* SMBus 2.0 */
-#define I2C_FUNC_SMBUS_PROC_CALL_PEC 0x00002000 /* SMBus 2.0 */
-#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL_PEC 0x00004000 /* SMBus 2.0 */
#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */
#define I2C_FUNC_SMBUS_QUICK 0x00010000
#define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */
#define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 0x10000000 /* I2C-like block xfer */
#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */
-#define I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC 0x40000000 /* SMBus 2.0 */
-#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC 0x80000000 /* SMBus 2.0 */
#define I2C_FUNC_SMBUS_BYTE (I2C_FUNC_SMBUS_READ_BYTE | \
I2C_FUNC_SMBUS_WRITE_BYTE)
I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)
#define I2C_FUNC_SMBUS_I2C_BLOCK_2 (I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 | \
I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2)
-#define I2C_FUNC_SMBUS_BLOCK_DATA_PEC (I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC | \
- I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC)
-#define I2C_FUNC_SMBUS_WORD_DATA_PEC (I2C_FUNC_SMBUS_READ_WORD_DATA_PEC | \
- I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC)
-
-#define I2C_FUNC_SMBUS_READ_BYTE_PEC I2C_FUNC_SMBUS_READ_BYTE_DATA
-#define I2C_FUNC_SMBUS_WRITE_BYTE_PEC I2C_FUNC_SMBUS_WRITE_BYTE_DATA
-#define I2C_FUNC_SMBUS_READ_BYTE_DATA_PEC I2C_FUNC_SMBUS_READ_WORD_DATA
-#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA_PEC I2C_FUNC_SMBUS_WRITE_WORD_DATA
-#define I2C_FUNC_SMBUS_BYTE_PEC I2C_FUNC_SMBUS_BYTE_DATA
-#define I2C_FUNC_SMBUS_BYTE_DATA_PEC I2C_FUNC_SMBUS_WORD_DATA
#define I2C_FUNC_SMBUS_EMUL (I2C_FUNC_SMBUS_QUICK | \
I2C_FUNC_SMBUS_BYTE | \
I2C_FUNC_SMBUS_WORD_DATA | \
I2C_FUNC_SMBUS_PROC_CALL | \
I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
- I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC | \
I2C_FUNC_SMBUS_I2C_BLOCK)
/*
* Data for SMBus Messages
*/
#define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */
-#define I2C_SMBUS_I2C_BLOCK_MAX 32 /* Not specified but we use same structure */
union i2c_smbus_data {
__u8 byte;
__u16 word;
- __u8 block[I2C_SMBUS_BLOCK_MAX + 3]; /* block[0] is used for length */
- /* one more for read length in block process call */
- /* and one more for PEC */
+ __u8 block[I2C_SMBUS_BLOCK_MAX + 2]; /* block[0] is used for length */
+ /* and one more for user-space compatibility */
};
/* smbus_access read or write markers */
#define I2C_SMBUS_BLOCK_DATA 5
#define I2C_SMBUS_I2C_BLOCK_DATA 6
#define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */
-#define I2C_SMBUS_BLOCK_DATA_PEC 8 /* SMBus 2.0 */
-#define I2C_SMBUS_PROC_CALL_PEC 9 /* SMBus 2.0 */
-#define I2C_SMBUS_BLOCK_PROC_CALL_PEC 10 /* SMBus 2.0 */
-#define I2C_SMBUS_WORD_DATA_PEC 11 /* SMBus 2.0 */
/* ----- commands for the ioctl like i2c_command call:
#define I2C_FUNCS 0x0705 /* Get the adapter functionality */
#define I2C_RDWR 0x0707 /* Combined R/W transfer (one stop only)*/
#define I2C_PEC 0x0708 /* != 0 for SMBus PEC */
-#if 0
-#define I2C_ACK_TEST 0x0710 /* See if a slave is at a specific address */
-#endif
#define I2C_SMBUS 0x0720 /* SMBus-level access */
-/* ... algo-bit.c recognizes */
-#define I2C_UDELAY 0x0705 /* set delay in microsecs between each */
- /* written byte (except address) */
-#define I2C_MDELAY 0x0706 /* millisec delay between written bytes */
-
/* ----- I2C-DEV: char device interface stuff ------------------------- */
#define I2C_MAJOR 89 /* Device major number */
module_param_array(var, short, &var##_num, 0); \
MODULE_PARM_DESC(var,desc)
-/* This is the one you want to use in your own modules */
+#define I2C_CLIENT_MODULE_PARM_FORCE(name) \
+I2C_CLIENT_MODULE_PARM(force_##name, \
+ "List of adapter,address pairs which are " \
+ "unquestionably assumed to contain a `" \
+ # name "' chip")
+
+
+#define I2C_CLIENT_INSMOD_COMMON \
+I2C_CLIENT_MODULE_PARM(probe, "List of adapter,address pairs to scan " \
+ "additionally"); \
+I2C_CLIENT_MODULE_PARM(ignore, "List of adapter,address pairs not to " \
+ "scan"); \
+static struct i2c_client_address_data addr_data = { \
+ .normal_i2c = normal_i2c, \
+ .probe = probe, \
+ .ignore = ignore, \
+ .forces = forces, \
+}
+
+/* These are the ones you want to use in your own drivers. Pick the one
+ which matches the number of devices the driver differenciates between. */
#define I2C_CLIENT_INSMOD \
- I2C_CLIENT_MODULE_PARM(probe, \
- "List of adapter,address pairs to scan additionally"); \
- I2C_CLIENT_MODULE_PARM(probe_range, \
- "List of adapter,start-addr,end-addr triples to scan " \
- "additionally"); \
- I2C_CLIENT_MODULE_PARM(ignore, \
- "List of adapter,address pairs not to scan"); \
- I2C_CLIENT_MODULE_PARM(ignore_range, \
- "List of adapter,start-addr,end-addr triples not to " \
- "scan"); \
I2C_CLIENT_MODULE_PARM(force, \
"List of adapter,address pairs to boldly assume " \
"to be present"); \
- static struct i2c_client_address_data addr_data = { \
- .normal_i2c = normal_i2c, \
- .normal_i2c_range = normal_i2c_range, \
- .probe = probe, \
- .probe_range = probe_range, \
- .ignore = ignore, \
- .ignore_range = ignore_range, \
- .force = force, \
- }
-
-/* Detect whether we are on the isa bus. If this returns true, all i2c
- access will fail! */
-#define i2c_is_isa_client(clientptr) \
- ((clientptr)->adapter->algo->id == I2C_ALGO_ISA)
-#define i2c_is_isa_adapter(adapptr) \
- ((adapptr)->algo->id == I2C_ALGO_ISA)
+ static unsigned short *forces[] = { \
+ force, \
+ NULL \
+ }; \
+I2C_CLIENT_INSMOD_COMMON
+
+#define I2C_CLIENT_INSMOD_1(chip1) \
+enum chips { any_chip, chip1 }; \
+I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \
+ "boldly assume to be present"); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
+static unsigned short *forces[] = { force, force_##chip1, NULL }; \
+I2C_CLIENT_INSMOD_COMMON
+
+#define I2C_CLIENT_INSMOD_2(chip1, chip2) \
+enum chips { any_chip, chip1, chip2 }; \
+I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \
+ "boldly assume to be present"); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
+static unsigned short *forces[] = { force, force_##chip1, \
+ force_##chip2, NULL }; \
+I2C_CLIENT_INSMOD_COMMON
+
+#define I2C_CLIENT_INSMOD_3(chip1, chip2, chip3) \
+enum chips { any_chip, chip1, chip2, chip3 }; \
+I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \
+ "boldly assume to be present"); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
+static unsigned short *forces[] = { force, force_##chip1, \
+ force_##chip2, force_##chip3, \
+ NULL }; \
+I2C_CLIENT_INSMOD_COMMON
+
+#define I2C_CLIENT_INSMOD_4(chip1, chip2, chip3, chip4) \
+enum chips { any_chip, chip1, chip2, chip3, chip4 }; \
+I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \
+ "boldly assume to be present"); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
+static unsigned short *forces[] = { force, force_##chip1, \
+ force_##chip2, force_##chip3, \
+ force_##chip4, NULL}; \
+I2C_CLIENT_INSMOD_COMMON
+
+#define I2C_CLIENT_INSMOD_5(chip1, chip2, chip3, chip4, chip5) \
+enum chips { any_chip, chip1, chip2, chip3, chip4, chip5 }; \
+I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \
+ "boldly assume to be present"); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
+static unsigned short *forces[] = { force, force_##chip1, \
+ force_##chip2, force_##chip3, \
+ force_##chip4, force_##chip5, \
+ NULL }; \
+I2C_CLIENT_INSMOD_COMMON
+
+#define I2C_CLIENT_INSMOD_6(chip1, chip2, chip3, chip4, chip5, chip6) \
+enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6 }; \
+I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \
+ "boldly assume to be present"); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip6); \
+static unsigned short *forces[] = { force, force_##chip1, \
+ force_##chip2, force_##chip3, \
+ force_##chip4, force_##chip5, \
+ force_##chip6, NULL }; \
+I2C_CLIENT_INSMOD_COMMON
+
+#define I2C_CLIENT_INSMOD_7(chip1, chip2, chip3, chip4, chip5, chip6, chip7) \
+enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, \
+ chip7 }; \
+I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \
+ "boldly assume to be present"); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip6); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip7); \
+static unsigned short *forces[] = { force, force_##chip1, \
+ force_##chip2, force_##chip3, \
+ force_##chip4, force_##chip5, \
+ force_##chip6, force_##chip7, \
+ NULL }; \
+I2C_CLIENT_INSMOD_COMMON
+
+#define I2C_CLIENT_INSMOD_8(chip1, chip2, chip3, chip4, chip5, chip6, chip7, chip8) \
+enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, \
+ chip7, chip8 }; \
+I2C_CLIENT_MODULE_PARM(force, "List of adapter,address pairs to " \
+ "boldly assume to be present"); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip1); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip2); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip3); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip4); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip5); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip6); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip7); \
+I2C_CLIENT_MODULE_PARM_FORCE(chip8); \
+static unsigned short *forces[] = { force, force_##chip1, \
+ force_##chip2, force_##chip3, \
+ force_##chip4, force_##chip5, \
+ force_##chip6, force_##chip7, \
+ force_##chip8, NULL }; \
+I2C_CLIENT_INSMOD_COMMON
#endif /* _LINUX_I2C_H */
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