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/* SPDX-License-Identifier: GPL-2.0 */
#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
 * mechanism 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__ */

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Name Type Size Permission Actions
book3s Folder 0755
nohash Folder 0755
8xx_immap.h File 13.77 KB 0644
Kbuild File 248 B 0644
accounting.h File 1 KB 0644
agp.h File 525 B 0644
archrandom.h File 1016 B 0644
asm-compat.h File 2.53 KB 0644
asm-offsets.h File 35 B 0644
asm-prototypes.h File 4.78 KB 0644
async_tx.h File 1.64 KB 0644
atomic.h File 13.57 KB 0644
backlight.h File 1.09 KB 0644
barrier.h File 3.57 KB 0644
bitops.h File 7.8 KB 0644
bootx.h File 1.12 KB 0644
btext.h File 926 B 0644
bug.h File 3.55 KB 0644
bugs.h File 486 B 0644
cache.h File 2.47 KB 0644
cacheflush.h File 3.76 KB 0644
cell-pmu.h File 4.04 KB 0644
cell-regs.h File 9.57 KB 0644
checksum.h File 5.85 KB 0644
cmpxchg.h File 12.16 KB 0644
code-patching-asm.h File 397 B 0644
code-patching.h File 5.01 KB 0644
compat.h File 6.26 KB 0644
context_tracking.h File 245 B 0644
copro.h File 769 B 0644
cpm.h File 5.09 KB 0644
cpm1.h File 21.08 KB 0644
cpm2.h File 48.43 KB 0644
cpu_has_feature.h File 1.31 KB 0644
cpufeature.h File 1.18 KB 0644
cpuidle.h File 3.31 KB 0644
cputable.h File 22.56 KB 0644
cputhreads.h File 2.92 KB 0644
cputime.h File 1.59 KB 0644
current.h File 835 B 0644
dbdma.h File 3.72 KB 0644
dbell.h File 2.78 KB 0644
dcr-generic.h File 1.58 KB 0644
dcr-mmio.h File 1.68 KB 0644
dcr-native.h File 4.42 KB 0644
dcr-regs.h File 5.71 KB 0644
dcr.h File 2.73 KB 0644
debug.h File 1.97 KB 0644
debugfs.h File 489 B 0644
delay.h File 3.42 KB 0644
device.h File 1.1 KB 0644
disassemble.h File 2.73 KB 0644
dma-mapping.h File 4.12 KB 0644
dma.h File 10.51 KB 0644
dt_cpu_ftrs.h File 816 B 0644
edac.h File 1.08 KB 0644
eeh.h File 14.44 KB 0644
eeh_event.h File 1.36 KB 0644
ehv_pic.h File 963 B 0644
elf.h File 6.29 KB 0644
emergency-restart.h File 43 B 0644
emulated_ops.h File 2.58 KB 0644
epapr_hcalls.h File 16.44 KB 0644
exception-64e.h File 7.21 KB 0644
exception-64s.h File 22.72 KB 0644
exec.h File 246 B 0644
extable.h File 904 B 0644
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fb.h File 483 B 0644
feature-fixups.h File 8.76 KB 0644
firmware.h File 4.71 KB 0644
fixmap.h File 2.33 KB 0644
floppy.h File 4.86 KB 0644
fs_pd.h File 1.02 KB 0644
fsl_85xx_cache_sram.h File 1.43 KB 0644
fsl_gtm.h File 1.38 KB 0644
fsl_hcalls.h File 17.2 KB 0644
fsl_lbc.h File 10.9 KB 0644
fsl_pamu_stash.h File 1.1 KB 0644
fsl_pm.h File 1.36 KB 0644
ftrace.h File 2.1 KB 0644
futex.h File 2.4 KB 0644
grackle.h File 331 B 0644
hardirq.h File 1.15 KB 0644
head-64.h File 13.86 KB 0644
heathrow.h File 2.53 KB 0644
highmem.h File 2.41 KB 0644
hmi.h File 1.49 KB 0644
hugetlb.h File 4.73 KB 0644
hvcall.h File 15.35 KB 0644
hvconsole.h File 1.37 KB 0644
hvcserver.h File 2.09 KB 0644
hvsi.h File 2.78 KB 0644
hw_breakpoint.h File 3.07 KB 0644
hw_irq.h File 5.24 KB 0644
hydra.h File 2.91 KB 0644
i8259.h File 361 B 0644
ibmebus.h File 2.15 KB 0644
icswx.h File 4.71 KB 0644
ide.h File 586 B 0644
ima.h File 772 B 0644
imc-pmu.h File 2.87 KB 0644
immap_cpm2.h File 10.5 KB 0644
io-defs.h File 3.09 KB 0644
io-workarounds.h File 1.54 KB 0644
io.h File 28.02 KB 0644
io_event_irq.h File 1.91 KB 0644
iommu.h File 10.16 KB 0644
ipic.h File 3.51 KB 0644
irq.h File 1.83 KB 0644
irq_work.h File 252 B 0644
irqflags.h File 1.7 KB 0644
isa-bridge.h File 654 B 0644
jump_label.h File 1.62 KB 0644
kdebug.h File 291 B 0644
kdump.h File 1.37 KB 0644
kexec.h File 4.02 KB 0644
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kgdb.h File 2.06 KB 0644
kmap_types.h File 434 B 0644
kprobes.h File 3.75 KB 0644
kup.h File 1021 B 0644
kvm_asm.h File 5.46 KB 0644
kvm_book3s.h File 12.06 KB 0644
kvm_book3s_32.h File 1.39 KB 0644
kvm_book3s_64.h File 12.62 KB 0644
kvm_book3s_asm.h File 4.4 KB 0644
kvm_booke.h File 2.68 KB 0644
kvm_booke_hv_asm.h File 2.03 KB 0644
kvm_fpu.h File 2.74 KB 0644
kvm_host.h File 19.92 KB 0644
kvm_para.h File 1.49 KB 0644
kvm_ppc.h File 34.83 KB 0644
libata-portmap.h File 249 B 0644
linkage.h File 501 B 0644
livepatch.h File 1.65 KB 0644
local.h File 3.79 KB 0644
lppaca.h File 5.02 KB 0644
lv1call.h File 18.74 KB 0644
machdep.h File 9.7 KB 0644
macio.h File 3.89 KB 0644
mc146818rtc.h File 943 B 0644
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mediabay.h File 1.34 KB 0644
mm-arch-hooks.h File 839 B 0644
mman.h File 1.33 KB 0644
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mmu-8xx.h File 8.6 KB 0644
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mmu_context.h File 6.26 KB 0644
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module.h File 2.47 KB 0644
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mpc52xx_psc.h File 9.89 KB 0644
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mpc85xx.h File 2.52 KB 0644
mpic.h File 13.97 KB 0644
mpic_msgr.h File 3.52 KB 0644
mpic_timer.h File 1.39 KB 0644
msi_bitmap.h File 1.01 KB 0644
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nvram.h File 3.21 KB 0644
ohare.h File 1.64 KB 0644
opal-api.h File 29.34 KB 0644
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oprofile_impl.h File 3 KB 0644
paca.h File 8.06 KB 0644
page.h File 10.65 KB 0644
page_32.h File 1.57 KB 0644
page_64.h File 2.93 KB 0644
parport.h File 956 B 0644
pasemi_dma.h File 23.32 KB 0644
pci-bridge.h File 9.21 KB 0644
pci.h File 4.58 KB 0644
percpu.h File 468 B 0644
perf_event.h File 1.23 KB 0644
perf_event_fsl_emb.h File 1.42 KB 0644
perf_event_server.h File 6.3 KB 0644
pgalloc.h File 620 B 0644
pgtable-be-types.h File 2.76 KB 0644
pgtable-types.h File 1.94 KB 0644
pgtable.h File 2.45 KB 0644
plpar_wrappers.h File 8.35 KB 0644
pmac_feature.h File 13.08 KB 0644
pmac_low_i2c.h File 3.24 KB 0644
pmac_pfunc.h File 8.01 KB 0644
pmc.h File 1.35 KB 0644
pmi.h File 1.77 KB 0644
pnv-ocxl.h File 1.4 KB 0644
pnv-pci.h File 3.22 KB 0644
powernv.h File 1.57 KB 0644
ppc-opcode.h File 19.05 KB 0644
ppc-pci.h File 2.69 KB 0644
ppc4xx.h File 530 B 0644
ppc4xx_ocm.h File 1.41 KB 0644
ppc_asm.h File 21.63 KB 0644
probes.h File 2.11 KB 0644
processor.h File 15 KB 0644
prom.h File 7.17 KB 0644
ps3.h File 15.44 KB 0644
ps3av.h File 23.49 KB 0644
ps3gpu.h File 2.44 KB 0644
ps3stor.h File 1.99 KB 0644
pte-common.h File 6.27 KB 0644
pte-walk.h File 1.11 KB 0644
ptrace.h File 7.14 KB 0644
reg.h File 61.61 KB 0644
reg_8xx.h File 4.96 KB 0644
reg_a2.h File 6.16 KB 0644
reg_booke.h File 36.17 KB 0644
reg_fsl_emb.h File 3.65 KB 0644
rheap.h File 2.43 KB 0644
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sections.h File 1.9 KB 0644
security_features.h File 3.03 KB 0644
serial.h File 677 B 0644
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sfp-machine.h File 12.38 KB 0644
shmparam.h File 206 B 0644
signal.h File 225 B 0644
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smp.h File 6.13 KB 0644
smu.h File 19.33 KB 0644
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spinlock.h File 7.04 KB 0644
spinlock_types.h File 424 B 0644
spu.h File 25.28 KB 0644
spu_csa.h File 6.64 KB 0644
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trace_clock.h File 517 B 0644
tsi108.h File 3.39 KB 0644
tsi108_irq.h File 4.48 KB 0644
tsi108_pci.h File 1.82 KB 0644
types.h File 1 KB 0644
uaccess.h File 13.21 KB 0644
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uic.h File 616 B 0644
unaligned.h File 548 B 0644
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