253 lines
8.0 KiB
C
253 lines
8.0 KiB
C
#ifndef __PMAC_PFUNC_H__
|
|
#define __PMAC_PFUNC_H__
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/list.h>
|
|
|
|
/* Flags in command lists */
|
|
#define PMF_FLAGS_ON_INIT 0x80000000u
|
|
#define PMF_FLGAS_ON_TERM 0x40000000u
|
|
#define PMF_FLAGS_ON_SLEEP 0x20000000u
|
|
#define PMF_FLAGS_ON_WAKE 0x10000000u
|
|
#define PMF_FLAGS_ON_DEMAND 0x08000000u
|
|
#define PMF_FLAGS_INT_GEN 0x04000000u
|
|
#define PMF_FLAGS_HIGH_SPEED 0x02000000u
|
|
#define PMF_FLAGS_LOW_SPEED 0x01000000u
|
|
#define PMF_FLAGS_SIDE_EFFECTS 0x00800000u
|
|
|
|
/*
|
|
* Arguments to a platform function call.
|
|
*
|
|
* NOTE: By convention, pointer arguments point to an u32
|
|
*/
|
|
struct pmf_args {
|
|
union {
|
|
u32 v;
|
|
u32 *p;
|
|
} u[4];
|
|
unsigned int count;
|
|
};
|
|
|
|
/*
|
|
* A driver capable of interpreting commands provides a handlers
|
|
* structure filled with whatever handlers are implemented by this
|
|
* driver. Non implemented handlers are left NULL.
|
|
*
|
|
* PMF_STD_ARGS are the same arguments that are passed to the parser
|
|
* and that gets passed back to the various handlers.
|
|
*
|
|
* Interpreting a given function always start with a begin() call which
|
|
* returns an instance data to be passed around subsequent calls, and
|
|
* ends with an end() call. This allows the low level driver to implement
|
|
* locking policy or per-function instance data.
|
|
*
|
|
* For interrupt capable functions, irq_enable() is called when a client
|
|
* registers, and irq_disable() is called when the last client unregisters
|
|
* Note that irq_enable & irq_disable are called within a semaphore held
|
|
* by the core, thus you should not try to register yourself to some other
|
|
* pmf interrupt during those calls.
|
|
*/
|
|
|
|
#define PMF_STD_ARGS struct pmf_function *func, void *instdata, \
|
|
struct pmf_args *args
|
|
|
|
struct pmf_function;
|
|
|
|
struct pmf_handlers {
|
|
void * (*begin)(struct pmf_function *func, struct pmf_args *args);
|
|
void (*end)(struct pmf_function *func, void *instdata);
|
|
|
|
int (*irq_enable)(struct pmf_function *func);
|
|
int (*irq_disable)(struct pmf_function *func);
|
|
|
|
int (*write_gpio)(PMF_STD_ARGS, u8 value, u8 mask);
|
|
int (*read_gpio)(PMF_STD_ARGS, u8 mask, int rshift, u8 xor);
|
|
|
|
int (*write_reg32)(PMF_STD_ARGS, u32 offset, u32 value, u32 mask);
|
|
int (*read_reg32)(PMF_STD_ARGS, u32 offset);
|
|
int (*write_reg16)(PMF_STD_ARGS, u32 offset, u16 value, u16 mask);
|
|
int (*read_reg16)(PMF_STD_ARGS, u32 offset);
|
|
int (*write_reg8)(PMF_STD_ARGS, u32 offset, u8 value, u8 mask);
|
|
int (*read_reg8)(PMF_STD_ARGS, u32 offset);
|
|
|
|
int (*delay)(PMF_STD_ARGS, u32 duration);
|
|
|
|
int (*wait_reg32)(PMF_STD_ARGS, u32 offset, u32 value, u32 mask);
|
|
int (*wait_reg16)(PMF_STD_ARGS, u32 offset, u16 value, u16 mask);
|
|
int (*wait_reg8)(PMF_STD_ARGS, u32 offset, u8 value, u8 mask);
|
|
|
|
int (*read_i2c)(PMF_STD_ARGS, u32 len);
|
|
int (*write_i2c)(PMF_STD_ARGS, u32 len, const u8 *data);
|
|
int (*rmw_i2c)(PMF_STD_ARGS, u32 masklen, u32 valuelen, u32 totallen,
|
|
const u8 *maskdata, const u8 *valuedata);
|
|
|
|
int (*read_cfg)(PMF_STD_ARGS, u32 offset, u32 len);
|
|
int (*write_cfg)(PMF_STD_ARGS, u32 offset, u32 len, const u8 *data);
|
|
int (*rmw_cfg)(PMF_STD_ARGS, u32 offset, u32 masklen, u32 valuelen,
|
|
u32 totallen, const u8 *maskdata, const u8 *valuedata);
|
|
|
|
int (*read_i2c_sub)(PMF_STD_ARGS, u8 subaddr, u32 len);
|
|
int (*write_i2c_sub)(PMF_STD_ARGS, u8 subaddr, u32 len, const u8 *data);
|
|
int (*set_i2c_mode)(PMF_STD_ARGS, int mode);
|
|
int (*rmw_i2c_sub)(PMF_STD_ARGS, u8 subaddr, u32 masklen, u32 valuelen,
|
|
u32 totallen, const u8 *maskdata,
|
|
const u8 *valuedata);
|
|
|
|
int (*read_reg32_msrx)(PMF_STD_ARGS, u32 offset, u32 mask, u32 shift,
|
|
u32 xor);
|
|
int (*read_reg16_msrx)(PMF_STD_ARGS, u32 offset, u32 mask, u32 shift,
|
|
u32 xor);
|
|
int (*read_reg8_msrx)(PMF_STD_ARGS, u32 offset, u32 mask, u32 shift,
|
|
u32 xor);
|
|
|
|
int (*write_reg32_slm)(PMF_STD_ARGS, u32 offset, u32 shift, u32 mask);
|
|
int (*write_reg16_slm)(PMF_STD_ARGS, u32 offset, u32 shift, u32 mask);
|
|
int (*write_reg8_slm)(PMF_STD_ARGS, u32 offset, u32 shift, u32 mask);
|
|
|
|
int (*mask_and_compare)(PMF_STD_ARGS, u32 len, const u8 *maskdata,
|
|
const u8 *valuedata);
|
|
|
|
struct module *owner;
|
|
};
|
|
|
|
|
|
/*
|
|
* Drivers who expose platform functions register at init time, this
|
|
* causes the platform functions for that device node to be parsed in
|
|
* advance and associated with the device. The data structures are
|
|
* partially public so a driver can walk the list of platform functions
|
|
* and eventually inspect the flags
|
|
*/
|
|
struct pmf_device;
|
|
|
|
struct pmf_function {
|
|
/* All functions for a given driver are linked */
|
|
struct list_head link;
|
|
|
|
/* Function node & driver data */
|
|
struct device_node *node;
|
|
void *driver_data;
|
|
|
|
/* For internal use by core */
|
|
struct pmf_device *dev;
|
|
|
|
/* The name is the "xxx" in "platform-do-xxx", this is how
|
|
* platform functions are identified by this code. Some functions
|
|
* only operate for a given target, in which case the phandle is
|
|
* here (or 0 if the filter doesn't apply)
|
|
*/
|
|
const char *name;
|
|
u32 phandle;
|
|
|
|
/* The flags for that function. You can have several functions
|
|
* with the same name and different flag
|
|
*/
|
|
u32 flags;
|
|
|
|
/* The actual tokenized function blob */
|
|
const void *data;
|
|
unsigned int length;
|
|
|
|
/* Interrupt clients */
|
|
struct list_head irq_clients;
|
|
|
|
/* Refcounting */
|
|
struct kref ref;
|
|
};
|
|
|
|
/*
|
|
* For platform functions that are interrupts, one can register
|
|
* irq_client structures. You canNOT use the same structure twice
|
|
* as it contains a link member. Also, the callback is called with
|
|
* a spinlock held, you must not call back into any of the pmf_* functions
|
|
* from within that callback
|
|
*/
|
|
struct pmf_irq_client {
|
|
void (*handler)(void *data);
|
|
void *data;
|
|
struct module *owner;
|
|
struct list_head link;
|
|
struct pmf_function *func;
|
|
};
|
|
|
|
|
|
/*
|
|
* Register/Unregister a function-capable driver and its handlers
|
|
*/
|
|
extern int pmf_register_driver(struct device_node *np,
|
|
struct pmf_handlers *handlers,
|
|
void *driverdata);
|
|
|
|
extern void pmf_unregister_driver(struct device_node *np);
|
|
|
|
|
|
/*
|
|
* Register/Unregister interrupt clients
|
|
*/
|
|
extern int pmf_register_irq_client(struct device_node *np,
|
|
const char *name,
|
|
struct pmf_irq_client *client);
|
|
|
|
extern void pmf_unregister_irq_client(struct pmf_irq_client *client);
|
|
|
|
/*
|
|
* Called by the handlers when an irq happens
|
|
*/
|
|
extern void pmf_do_irq(struct pmf_function *func);
|
|
|
|
|
|
/*
|
|
* Low level call to platform functions.
|
|
*
|
|
* The phandle can filter on the target object for functions that have
|
|
* multiple targets, the flags allow you to restrict the call to a given
|
|
* combination of flags.
|
|
*
|
|
* The args array contains as many arguments as is required by the function,
|
|
* this is dependent on the function you are calling, unfortunately Apple
|
|
* mecanism provides no way to encode that so you have to get it right at
|
|
* the call site. Some functions require no args, in which case, you can
|
|
* pass NULL.
|
|
*
|
|
* You can also pass NULL to the name. This will match any function that has
|
|
* the appropriate combination of flags & phandle or you can pass 0 to the
|
|
* phandle to match any
|
|
*/
|
|
extern int pmf_do_functions(struct device_node *np, const char *name,
|
|
u32 phandle, u32 flags, struct pmf_args *args);
|
|
|
|
|
|
|
|
/*
|
|
* High level call to a platform function.
|
|
*
|
|
* This one looks for the platform-xxx first so you should call it to the
|
|
* actual target if any. It will fallback to platform-do-xxx if it can't
|
|
* find one. It will also exclusively target functions that have
|
|
* the "OnDemand" flag.
|
|
*/
|
|
|
|
extern int pmf_call_function(struct device_node *target, const char *name,
|
|
struct pmf_args *args);
|
|
|
|
|
|
/*
|
|
* For low latency interrupt usage, you can lookup for on-demand functions
|
|
* using the functions below
|
|
*/
|
|
|
|
extern struct pmf_function *pmf_find_function(struct device_node *target,
|
|
const char *name);
|
|
|
|
extern struct pmf_function * pmf_get_function(struct pmf_function *func);
|
|
extern void pmf_put_function(struct pmf_function *func);
|
|
|
|
extern int pmf_call_one(struct pmf_function *func, struct pmf_args *args);
|
|
|
|
|
|
/* Suspend/resume code called by via-pmu directly for now */
|
|
extern void pmac_pfunc_base_suspend(void);
|
|
extern void pmac_pfunc_base_resume(void);
|
|
|
|
#endif /* __PMAC_PFUNC_H__ */
|