1 #ifndef __PMAC_PFUNC_H__
2 #define __PMAC_PFUNC_H__
4 #include <linux/types.h>
5 #include <linux/list.h>
7 /* Flags in command lists */
8 #define PMF_FLAGS_ON_INIT 0x80000000u
9 #define PMF_FLGAS_ON_TERM 0x40000000u
10 #define PMF_FLAGS_ON_SLEEP 0x20000000u
11 #define PMF_FLAGS_ON_WAKE 0x10000000u
12 #define PMF_FLAGS_ON_DEMAND 0x08000000u
13 #define PMF_FLAGS_INT_GEN 0x04000000u
14 #define PMF_FLAGS_HIGH_SPEED 0x02000000u
15 #define PMF_FLAGS_LOW_SPEED 0x01000000u
16 #define PMF_FLAGS_SIDE_EFFECTS 0x00800000u
19 * Arguments to a platform function call.
21 * NOTE: By convention, pointer arguments point to an u32
32 * A driver capable of interpreting commands provides a handlers
33 * structure filled with whatever handlers are implemented by this
34 * driver. Non implemented handlers are left NULL.
36 * PMF_STD_ARGS are the same arguments that are passed to the parser
37 * and that gets passed back to the various handlers.
39 * Interpreting a given function always start with a begin() call which
40 * returns an instance data to be passed around subsequent calls, and
41 * ends with an end() call. This allows the low level driver to implement
42 * locking policy or per-function instance data.
44 * For interrupt capable functions, irq_enable() is called when a client
45 * registers, and irq_disable() is called when the last client unregisters
46 * Note that irq_enable & irq_disable are called within a semaphore held
47 * by the core, thus you should not try to register yourself to some other
48 * pmf interrupt during those calls.
51 #define PMF_STD_ARGS struct pmf_function *func, void *instdata, \
57 void * (*begin)(struct pmf_function *func, struct pmf_args *args);
58 void (*end)(struct pmf_function *func, void *instdata);
60 int (*irq_enable)(struct pmf_function *func);
61 int (*irq_disable)(struct pmf_function *func);
63 int (*write_gpio)(PMF_STD_ARGS, u8 value, u8 mask);
64 int (*read_gpio)(PMF_STD_ARGS, u8 mask, int rshift, u8 xor);
66 int (*write_reg32)(PMF_STD_ARGS, u32 offset, u32 value, u32 mask);
67 int (*read_reg32)(PMF_STD_ARGS, u32 offset);
68 int (*write_reg16)(PMF_STD_ARGS, u32 offset, u16 value, u16 mask);
69 int (*read_reg16)(PMF_STD_ARGS, u32 offset);
70 int (*write_reg8)(PMF_STD_ARGS, u32 offset, u8 value, u8 mask);
71 int (*read_reg8)(PMF_STD_ARGS, u32 offset);
73 int (*delay)(PMF_STD_ARGS, u32 duration);
75 int (*wait_reg32)(PMF_STD_ARGS, u32 offset, u32 value, u32 mask);
76 int (*wait_reg16)(PMF_STD_ARGS, u32 offset, u16 value, u16 mask);
77 int (*wait_reg8)(PMF_STD_ARGS, u32 offset, u8 value, u8 mask);
79 int (*read_i2c)(PMF_STD_ARGS, u32 len);
80 int (*write_i2c)(PMF_STD_ARGS, u32 len, const u8 *data);
81 int (*rmw_i2c)(PMF_STD_ARGS, u32 masklen, u32 valuelen, u32 totallen,
82 const u8 *maskdata, const u8 *valuedata);
84 int (*read_cfg)(PMF_STD_ARGS, u32 offset, u32 len);
85 int (*write_cfg)(PMF_STD_ARGS, u32 offset, u32 len, const u8 *data);
86 int (*rmw_cfg)(PMF_STD_ARGS, u32 offset, u32 masklen, u32 valuelen,
87 u32 totallen, const u8 *maskdata, const u8 *valuedata);
89 int (*read_i2c_sub)(PMF_STD_ARGS, u8 subaddr, u32 len);
90 int (*write_i2c_sub)(PMF_STD_ARGS, u8 subaddr, u32 len, const u8 *data);
91 int (*set_i2c_mode)(PMF_STD_ARGS, int mode);
92 int (*rmw_i2c_sub)(PMF_STD_ARGS, u8 subaddr, u32 masklen, u32 valuelen,
93 u32 totallen, const u8 *maskdata,
96 int (*read_reg32_msrx)(PMF_STD_ARGS, u32 offset, u32 mask, u32 shift,
98 int (*read_reg16_msrx)(PMF_STD_ARGS, u32 offset, u32 mask, u32 shift,
100 int (*read_reg8_msrx)(PMF_STD_ARGS, u32 offset, u32 mask, u32 shift,
103 int (*write_reg32_slm)(PMF_STD_ARGS, u32 offset, u32 shift, u32 mask);
104 int (*write_reg16_slm)(PMF_STD_ARGS, u32 offset, u32 shift, u32 mask);
105 int (*write_reg8_slm)(PMF_STD_ARGS, u32 offset, u32 shift, u32 mask);
107 int (*mask_and_compare)(PMF_STD_ARGS, u32 len, const u8 *maskdata,
108 const u8 *valuedata);
110 struct module *owner;
115 * Drivers who expose platform functions register at init time, this
116 * causes the platform functions for that device node to be parsed in
117 * advance and associated with the device. The data structures are
118 * partially public so a driver can walk the list of platform functions
119 * and eventually inspect the flags
123 struct pmf_function {
124 /* All functions for a given driver are linked */
125 struct list_head link;
127 /* Function node & driver data */
128 struct device_node *node;
131 /* For internal use by core */
132 struct pmf_device *dev;
134 /* The name is the "xxx" in "platform-do-xxx", this is how
135 * platform functions are identified by this code. Some functions
136 * only operate for a given target, in which case the phandle is
137 * here (or 0 if the filter doesn't apply)
142 /* The flags for that function. You can have several functions
143 * with the same name and different flag
147 /* The actual tokenized function blob */
151 /* Interrupt clients */
152 struct list_head irq_clients;
159 * For platform functions that are interrupts, one can register
160 * irq_client structures. You canNOT use the same structure twice
161 * as it contains a link member. Also, the callback is called with
162 * a spinlock held, you must not call back into any of the pmf_* functions
163 * from within that callback
165 struct pmf_irq_client {
166 void (*handler)(void *data);
168 struct module *owner;
169 struct list_head link;
170 struct pmf_function *func;
175 * Register/Unregister a function-capable driver and its handlers
177 extern int pmf_register_driver(struct device_node *np,
178 struct pmf_handlers *handlers,
181 extern void pmf_unregister_driver(struct device_node *np);
185 * Register/Unregister interrupt clients
187 extern int pmf_register_irq_client(struct device_node *np,
189 struct pmf_irq_client *client);
191 extern void pmf_unregister_irq_client(struct pmf_irq_client *client);
194 * Called by the handlers when an irq happens
196 extern void pmf_do_irq(struct pmf_function *func);
200 * Low level call to platform functions.
202 * The phandle can filter on the target object for functions that have
203 * multiple targets, the flags allow you to restrict the call to a given
204 * combination of flags.
206 * The args array contains as many arguments as is required by the function,
207 * this is dependent on the function you are calling, unfortunately Apple
208 * mechanism provides no way to encode that so you have to get it right at
209 * the call site. Some functions require no args, in which case, you can
212 * You can also pass NULL to the name. This will match any function that has
213 * the appropriate combination of flags & phandle or you can pass 0 to the
214 * phandle to match any
216 extern int pmf_do_functions(struct device_node *np, const char *name,
217 u32 phandle, u32 flags, struct pmf_args *args);
222 * High level call to a platform function.
224 * This one looks for the platform-xxx first so you should call it to the
225 * actual target if any. It will fallback to platform-do-xxx if it can't
226 * find one. It will also exclusively target functions that have
227 * the "OnDemand" flag.
230 extern int pmf_call_function(struct device_node *target, const char *name,
231 struct pmf_args *args);
235 * For low latency interrupt usage, you can lookup for on-demand functions
236 * using the functions below
239 extern struct pmf_function *pmf_find_function(struct device_node *target,
242 extern struct pmf_function * pmf_get_function(struct pmf_function *func);
243 extern void pmf_put_function(struct pmf_function *func);
245 extern int pmf_call_one(struct pmf_function *func, struct pmf_args *args);
248 /* Suspend/resume code called by via-pmu directly for now */
249 extern void pmac_pfunc_base_suspend(void);
250 extern void pmac_pfunc_base_resume(void);
252 #endif /* __PMAC_PFUNC_H__ */