[deliverable/linux.git] / arch / mips / include / asm / mips-cpc.h

/*
 * Copyright (C) 2013 Imagination Technologies
 * Author: Paul Burton <paul.burton@imgtec.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#ifndef __MIPS_ASM_MIPS_CPC_H__
#define __MIPS_ASM_MIPS_CPC_H__

#include <linux/io.h>
#include <linux/types.h>

/* The base address of the CPC registers */
extern void __iomem *mips_cpc_base;

/**
 * mips_cpc_default_phys_base - retrieve the default physical base address of
 *                              the CPC
 *
 * Returns the default physical base address of the Cluster Power Controller
 * memory mapped registers. This is platform dependant & must therefore be
 * implemented per-platform.
 */
extern phys_addr_t mips_cpc_default_phys_base(void);

/**
 * mips_cpc_probe - probe for a Cluster Power Controller
 *
 * Attempt to detect the presence of a Cluster Power Controller. Returns 0 if
 * a CPC is successfully detected, else -errno.
 */
#ifdef CONFIG_MIPS_CPC
extern int mips_cpc_probe(void);
#else
static inline int mips_cpc_probe(void)
{
	return -ENODEV;
}
#endif

/**
 * mips_cpc_present - determine whether a Cluster Power Controller is present
 *
 * Returns true if a CPC is present in the system, else false.
 */
static inline bool mips_cpc_present(void)
{
#ifdef CONFIG_MIPS_CPC
	return mips_cpc_base != NULL;
#else
	return false;
#endif
}

/* Offsets from the CPC base address to various control blocks */
#define MIPS_CPC_GCB_OFS	0x0000
#define MIPS_CPC_CLCB_OFS	0x2000
#define MIPS_CPC_COCB_OFS	0x4000

/* Macros to ease the creation of register access functions */
#define BUILD_CPC_R_(name, off)					\
static inline u32 *addr_cpc_##name(void)			\
{								\
	return (u32 *)(mips_cpc_base + (off));			\
}								\
								\
static inline u32 read_cpc_##name(void)				\
{								\
	return __raw_readl(mips_cpc_base + (off));		\
}

#define BUILD_CPC__W(name, off) \
static inline void write_cpc_##name(u32 value)			\
{								\
	__raw_writel(value, mips_cpc_base + (off));		\
}

#define BUILD_CPC_RW(name, off)					\
	BUILD_CPC_R_(name, off)					\
	BUILD_CPC__W(name, off)

#define BUILD_CPC_Cx_R_(name, off)				\
	BUILD_CPC_R_(cl_##name, MIPS_CPC_CLCB_OFS + (off))	\
	BUILD_CPC_R_(co_##name, MIPS_CPC_COCB_OFS + (off))

#define BUILD_CPC_Cx__W(name, off)				\
	BUILD_CPC__W(cl_##name, MIPS_CPC_CLCB_OFS + (off))	\
	BUILD_CPC__W(co_##name, MIPS_CPC_COCB_OFS + (off))

#define BUILD_CPC_Cx_RW(name, off)				\
	BUILD_CPC_Cx_R_(name, off)				\
	BUILD_CPC_Cx__W(name, off)

/* GCB register accessor functions */
BUILD_CPC_RW(access,		MIPS_CPC_GCB_OFS + 0x00)
BUILD_CPC_RW(seqdel,		MIPS_CPC_GCB_OFS + 0x08)
BUILD_CPC_RW(rail,		MIPS_CPC_GCB_OFS + 0x10)
BUILD_CPC_RW(resetlen,		MIPS_CPC_GCB_OFS + 0x18)
BUILD_CPC_R_(revision,		MIPS_CPC_GCB_OFS + 0x20)

/* Core Local & Core Other accessor functions */
BUILD_CPC_Cx_RW(cmd,		0x00)
BUILD_CPC_Cx_RW(stat_conf,	0x08)
BUILD_CPC_Cx_RW(other,		0x10)

/* CPC_Cx_CMD register fields */
#define CPC_Cx_CMD_SHF				0
#define CPC_Cx_CMD_MSK				(_ULCAST_(0xf) << 0)
#define  CPC_Cx_CMD_CLOCKOFF			(_ULCAST_(0x1) << 0)
#define  CPC_Cx_CMD_PWRDOWN			(_ULCAST_(0x2) << 0)
#define  CPC_Cx_CMD_PWRUP			(_ULCAST_(0x3) << 0)
#define  CPC_Cx_CMD_RESET			(_ULCAST_(0x4) << 0)

/* CPC_Cx_STAT_CONF register fields */
#define CPC_Cx_STAT_CONF_PWRUPE_SHF		23
#define CPC_Cx_STAT_CONF_PWRUPE_MSK		(_ULCAST_(0x1) << 23)
#define CPC_Cx_STAT_CONF_SEQSTATE_SHF		19
#define CPC_Cx_STAT_CONF_SEQSTATE_MSK		(_ULCAST_(0xf) << 19)
#define  CPC_Cx_STAT_CONF_SEQSTATE_D0		(_ULCAST_(0x0) << 19)
#define  CPC_Cx_STAT_CONF_SEQSTATE_U0		(_ULCAST_(0x1) << 19)
#define  CPC_Cx_STAT_CONF_SEQSTATE_U1		(_ULCAST_(0x2) << 19)
#define  CPC_Cx_STAT_CONF_SEQSTATE_U2		(_ULCAST_(0x3) << 19)
#define  CPC_Cx_STAT_CONF_SEQSTATE_U3		(_ULCAST_(0x4) << 19)
#define  CPC_Cx_STAT_CONF_SEQSTATE_U4		(_ULCAST_(0x5) << 19)
#define  CPC_Cx_STAT_CONF_SEQSTATE_U5		(_ULCAST_(0x6) << 19)
#define  CPC_Cx_STAT_CONF_SEQSTATE_U6		(_ULCAST_(0x7) << 19)
#define  CPC_Cx_STAT_CONF_SEQSTATE_D1		(_ULCAST_(0x8) << 19)
#define  CPC_Cx_STAT_CONF_SEQSTATE_D3		(_ULCAST_(0x9) << 19)
#define  CPC_Cx_STAT_CONF_SEQSTATE_D2		(_ULCAST_(0xa) << 19)
#define CPC_Cx_STAT_CONF_CLKGAT_IMPL_SHF	17
#define CPC_Cx_STAT_CONF_CLKGAT_IMPL_MSK	(_ULCAST_(0x1) << 17)
#define CPC_Cx_STAT_CONF_PWRDN_IMPL_SHF		16
#define CPC_Cx_STAT_CONF_PWRDN_IMPL_MSK		(_ULCAST_(0x1) << 16)
#define CPC_Cx_STAT_CONF_EJTAG_PROBE_SHF	15
#define CPC_Cx_STAT_CONF_EJTAG_PROBE_MSK	(_ULCAST_(0x1) << 15)

/* CPC_Cx_OTHER register fields */
#define CPC_Cx_OTHER_CORENUM_SHF		16
#define CPC_Cx_OTHER_CORENUM_MSK		(_ULCAST_(0xff) << 16)

#ifdef CONFIG_MIPS_CPC

/**
 * mips_cpc_lock_other - lock access to another core
 * core: the other core to be accessed
 *
 * Call before operating upon a core via the 'other' register region in
 * order to prevent the region being moved during access. Must be called
 * within the bounds of a mips_cm_{lock,unlock}_other pair, and followed
 * by a call to mips_cpc_unlock_other.
 */
extern void mips_cpc_lock_other(unsigned int core);

/**
 * mips_cpc_unlock_other - unlock access to another core
 *
 * Call after operating upon another core via the 'other' register region.
 * Must be called after mips_cpc_lock_other.
 */
extern void mips_cpc_unlock_other(void);

#else /* !CONFIG_MIPS_CPC */

static inline void mips_cpc_lock_other(unsigned int core) { }
static inline void mips_cpc_unlock_other(void) { }

#endif /* !CONFIG_MIPS_CPC */

#endif /* __MIPS_ASM_MIPS_CPC_H__ */
Commit	Line	Data
9c38cf44 PB	1	/*
	2	* Copyright (C) 2013 Imagination Technologies
	3	* Author: Paul Burton <paul.burton@imgtec.com>
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms of the GNU General Public License as published by the
	7	* Free Software Foundation; either version 2 of the License, or (at your
	8	* option) any later version.
	9	*/
	10
	11	#ifndef __MIPS_ASM_MIPS_CPC_H__
	12	#define __MIPS_ASM_MIPS_CPC_H__
	13
	14	#include <linux/io.h>
	15	#include <linux/types.h>
	16
	17	/* The base address of the CPC registers */
	18	extern void __iomem *mips_cpc_base;
	19
	20	/**
	21	* mips_cpc_default_phys_base - retrieve the default physical base address of
	22	* the CPC
	23	*
	24	* Returns the default physical base address of the Cluster Power Controller
	25	* memory mapped registers. This is platform dependant & must therefore be
	26	* implemented per-platform.
	27	*/
15d45cce	28	extern phys_addr_t mips_cpc_default_phys_base(void);
9c38cf44	29
9c38cf44 PB	30	/**
	31	* mips_cpc_probe - probe for a Cluster Power Controller
	32	*
	33	* Attempt to detect the presence of a Cluster Power Controller. Returns 0 if
	34	* a CPC is successfully detected, else -errno.
	35	*/
	36	#ifdef CONFIG_MIPS_CPC
	37	extern int mips_cpc_probe(void);
	38	#else
	39	static inline int mips_cpc_probe(void)
	40	{
	41	return -ENODEV;
	42	}
	43	#endif
	44
	45	/**
	46	* mips_cpc_present - determine whether a Cluster Power Controller is present
	47	*
	48	* Returns true if a CPC is present in the system, else false.
	49	*/
	50	static inline bool mips_cpc_present(void)
	51	{
	52	#ifdef CONFIG_MIPS_CPC
	53	return mips_cpc_base != NULL;
	54	#else
	55	return false;
	56	#endif
	57	}
	58
	59	/* Offsets from the CPC base address to various control blocks */
	60	#define MIPS_CPC_GCB_OFS 0x0000
	61	#define MIPS_CPC_CLCB_OFS 0x2000
	62	#define MIPS_CPC_COCB_OFS 0x4000
	63
	64	/* Macros to ease the creation of register access functions */
2ba60250 PB	65	#define BUILD_CPC_R_(name, off) \
	66	static inline u32 *addr_cpc_##name(void) \
	67	{ \
	68	return (u32 *)(mips_cpc_base + (off)); \
	69	} \
	70	\
9c38cf44 PB	71	static inline u32 read_cpc_##name(void) \
9c38cf44 PB	72	{ \
9a1724c7	73	return __raw_readl(mips_cpc_base + (off)); \
9c38cf44 PB	74	}
	75
	76	#define BUILD_CPC__W(name, off) \
	77	static inline void write_cpc_##name(u32 value) \
	78	{ \
9a1724c7	79	__raw_writel(value, mips_cpc_base + (off)); \
9c38cf44 PB	80	}
	81
	82	#define BUILD_CPC_RW(name, off) \
	83	BUILD_CPC_R_(name, off) \
	84	BUILD_CPC__W(name, off)
	85
	86	#define BUILD_CPC_Cx_R_(name, off) \
	87	BUILD_CPC_R_(cl_##name, MIPS_CPC_CLCB_OFS + (off)) \
	88	BUILD_CPC_R_(co_##name, MIPS_CPC_COCB_OFS + (off))
	89
	90	#define BUILD_CPC_Cx__W(name, off) \
	91	BUILD_CPC__W(cl_##name, MIPS_CPC_CLCB_OFS + (off)) \
	92	BUILD_CPC__W(co_##name, MIPS_CPC_COCB_OFS + (off))
	93
	94	#define BUILD_CPC_Cx_RW(name, off) \
	95	BUILD_CPC_Cx_R_(name, off) \
	96	BUILD_CPC_Cx__W(name, off)
	97
	98	/* GCB register accessor functions */
	99	BUILD_CPC_RW(access, MIPS_CPC_GCB_OFS + 0x00)
	100	BUILD_CPC_RW(seqdel, MIPS_CPC_GCB_OFS + 0x08)
	101	BUILD_CPC_RW(rail, MIPS_CPC_GCB_OFS + 0x10)
	102	BUILD_CPC_RW(resetlen, MIPS_CPC_GCB_OFS + 0x18)
	103	BUILD_CPC_R_(revision, MIPS_CPC_GCB_OFS + 0x20)
	104
	105	/* Core Local & Core Other accessor functions */
	106	BUILD_CPC_Cx_RW(cmd, 0x00)
	107	BUILD_CPC_Cx_RW(stat_conf, 0x08)
	108	BUILD_CPC_Cx_RW(other, 0x10)
	109
	110	/* CPC_Cx_CMD register fields */
	111	#define CPC_Cx_CMD_SHF 0
	112	#define CPC_Cx_CMD_MSK (_ULCAST_(0xf) << 0)
	113	#define CPC_Cx_CMD_CLOCKOFF (_ULCAST_(0x1) << 0)
	114	#define CPC_Cx_CMD_PWRDOWN (_ULCAST_(0x2) << 0)
	115	#define CPC_Cx_CMD_PWRUP (_ULCAST_(0x3) << 0)
	116	#define CPC_Cx_CMD_RESET (_ULCAST_(0x4) << 0)
	117
	118	/* CPC_Cx_STAT_CONF register fields */
	119	#define CPC_Cx_STAT_CONF_PWRUPE_SHF 23
	120	#define CPC_Cx_STAT_CONF_PWRUPE_MSK (_ULCAST_(0x1) << 23)
	121	#define CPC_Cx_STAT_CONF_SEQSTATE_SHF 19
	122	#define CPC_Cx_STAT_CONF_SEQSTATE_MSK (_ULCAST_(0xf) << 19)
	123	#define CPC_Cx_STAT_CONF_SEQSTATE_D0 (_ULCAST_(0x0) << 19)
	124	#define CPC_Cx_STAT_CONF_SEQSTATE_U0 (_ULCAST_(0x1) << 19)
	125	#define CPC_Cx_STAT_CONF_SEQSTATE_U1 (_ULCAST_(0x2) << 19)
	126	#define CPC_Cx_STAT_CONF_SEQSTATE_U2 (_ULCAST_(0x3) << 19)
	127	#define CPC_Cx_STAT_CONF_SEQSTATE_U3 (_ULCAST_(0x4) << 19)
	128	#define CPC_Cx_STAT_CONF_SEQSTATE_U4 (_ULCAST_(0x5) << 19)
	129	#define CPC_Cx_STAT_CONF_SEQSTATE_U5 (_ULCAST_(0x6) << 19)
	130	#define CPC_Cx_STAT_CONF_SEQSTATE_U6 (_ULCAST_(0x7) << 19)
	131	#define CPC_Cx_STAT_CONF_SEQSTATE_D1 (_ULCAST_(0x8) << 19)
	132	#define CPC_Cx_STAT_CONF_SEQSTATE_D3 (_ULCAST_(0x9) << 19)
	133	#define CPC_Cx_STAT_CONF_SEQSTATE_D2 (_ULCAST_(0xa) << 19)
	134	#define CPC_Cx_STAT_CONF_CLKGAT_IMPL_SHF 17
	135	#define CPC_Cx_STAT_CONF_CLKGAT_IMPL_MSK (_ULCAST_(0x1) << 17)
	136	#define CPC_Cx_STAT_CONF_PWRDN_IMPL_SHF 16
	137	#define CPC_Cx_STAT_CONF_PWRDN_IMPL_MSK (_ULCAST_(0x1) << 16)
	138	#define CPC_Cx_STAT_CONF_EJTAG_PROBE_SHF 15
	139	#define CPC_Cx_STAT_CONF_EJTAG_PROBE_MSK (_ULCAST_(0x1) << 15)
	140
	141	/* CPC_Cx_OTHER register fields */
	142	#define CPC_Cx_OTHER_CORENUM_SHF 16
	143	#define CPC_Cx_OTHER_CORENUM_MSK (_ULCAST_(0xff) << 16)
144
76ae6584 PB	145	#ifdef CONFIG_MIPS_CPC
	146
	147	/**
	148	* mips_cpc_lock_other - lock access to another core
	149	* core: the other core to be accessed
	150	*
	151	* Call before operating upon a core via the 'other' register region in
4ede3161 PB	152	* order to prevent the region being moved during access. Must be called
4ede3161 PB	153	* within the bounds of a mips_cm_{lock,unlock}_other pair, and followed
76ae6584 PB	154	* by a call to mips_cpc_unlock_other.
	155	*/
	156	extern void mips_cpc_lock_other(unsigned int core);
	157
	158	/**
	159	* mips_cpc_unlock_other - unlock access to another core
	160	*
	161	* Call after operating upon another core via the 'other' register region.
	162	* Must be called after mips_cpc_lock_other.
	163	*/
	164	extern void mips_cpc_unlock_other(void);
	165
	166	#else /* !CONFIG_MIPS_CPC */
	167
	168	static inline void mips_cpc_lock_other(unsigned int core) { }
	169	static inline void mips_cpc_unlock_other(void) { }
	170
	171	#endif /* !CONFIG_MIPS_CPC */
	172
9c38cf44	173	#endif /* __MIPS_ASM_MIPS_CPC_H__ */