3 files changed, 275 insertions, 0 deletions

diff --git a/include/asm-powerpc/pmac_feature.h b/include/asm-powerpc/pmac_feature.h
index e654ad0e5b42..3221628130c4 100644
--- a/include/asm-powerpc/pmac_feature.h
+++ b/include/asm-powerpc/pmac_feature.h
@@ -374,5 +374,24 @@ extern struct macio_chip* macio_find(struct device_node* child, int type);
 #define MACIO_IN8(r)            (in_8(MACIO_FCR8(macio,r)))
 #define MACIO_OUT8(r,v)         (out_8(MACIO_FCR8(macio,r), (v)))
 
+/*
+ * Those are exported by pmac feature for internal use by arch code
+ * only like the platform function callbacks, do not use directly in drivers
+ */
+extern spinlock_t feature_lock;
+extern struct device_node *uninorth_node;
+extern u32 __iomem *uninorth_base;
+
+/*
+ * Uninorth reg. access. Note that Uni-N regs are big endian
+ */
+
+#define UN_REG(r)       (uninorth_base + ((r) >> 2))
+#define UN_IN(r)        (in_be32(UN_REG(r)))
+#define UN_OUT(r,v)     (out_be32(UN_REG(r), (v)))
+#define UN_BIS(r,v)     (UN_OUT((r), UN_IN(r) | (v)))
+#define UN_BIC(r,v)     (UN_OUT((r), UN_IN(r) & ~(v)))
+
+
 #endif /* __PPC_ASM_PMAC_FEATURE_H */
 #endif /* __KERNEL__ */
diff --git a/include/asm-powerpc/pmac_low_i2c.h b/include/asm-powerpc/pmac_low_i2c.h
index 480018f41e1a..131011bd7e76 100644
--- a/include/asm-powerpc/pmac_low_i2c.h
+++ b/include/asm-powerpc/pmac_low_i2c.h
@@ -99,6 +99,9 @@ extern int pmac_i2c_setmode(struct pmac_i2c_bus *bus, int mode);
 extern int pmac_i2c_xfer(struct pmac_i2c_bus *bus, u8 addrdir, int subsize,
                          u32 subaddr, u8 *data,  int len);
 
+/* Suspend/resume code called by via-pmu directly for now */
+extern void pmac_pfunc_i2c_suspend(void);
+extern void pmac_pfunc_i2c_resume(void);
 
 #endif /* __KERNEL__ */
 #endif /* __PMAC_LOW_I2C_H__ */
diff --git a/include/asm-powerpc/pmac_pfunc.h b/include/asm-powerpc/pmac_pfunc.h
new file mode 100644
index 000000000000..d9728c80f86d
--- /dev/null
+++ b/include/asm-powerpc/pmac_pfunc.h
@@ -0,0 +1,253 @@
+#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;
+};
+
+
+/*
+ * 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 device_node *np,
+                                      const char *name,
+                                      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__ */