/*
 * Copyright (c) 2014 MundoReader S.L.
 * Author: Heiko Stuebner <heiko@sntech.de>
 *
 * based on
 *
 * samsung/clk.h
 * Copyright (c) 2013 Samsung Electronics Co., Ltd.
 * Copyright (c) 2013 Linaro Ltd.
 * Author: Thomas Abraham <thomas.ab@samsung.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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifndef CLK_ROCKCHIP_CLK_H
#define CLK_ROCKCHIP_CLK_H

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

/* To keep changes from kernel smaller */
#define CLK_IGNORE_UNUSED 0
#define CLK_GATE_SET_TO_DISABLE	CLK_GATE_INVERTED
#define CLK_GET_RATE_NOCACHE 0

#define HIWORD_UPDATE(val, mask, shift) \
		((val) << (shift) | (mask) << ((shift) + 16))

/* register positions shared by RK2928, RK3066 and RK3188 */
#define RK2928_PLL_CON(x)		(x * 0x4)
#define RK2928_MODE_CON		0x40
#define RK2928_CLKSEL_CON(x)	(x * 0x4 + 0x44)
#define RK2928_CLKGATE_CON(x)	(x * 0x4 + 0xd0)
#define RK2928_GLB_SRST_FST		0x100
#define RK2928_GLB_SRST_SND		0x104
#define RK2928_SOFTRST_CON(x)	(x * 0x4 + 0x110)
#define RK2928_MISC_CON		0x134

#define RK3288_PLL_CON(x)		RK2928_PLL_CON(x)
#define RK3288_MODE_CON			0x50
#define RK3288_CLKSEL_CON(x)		(x * 0x4 + 0x60)
#define RK3288_CLKGATE_CON(x)		(x * 0x4 + 0x160)
#define RK3288_GLB_SRST_FST		0x1b0
#define RK3288_GLB_SRST_SND		0x1b4
#define RK3288_SOFTRST_CON(x)		(x * 0x4 + 0x1b8)
#define RK3288_MISC_CON			0x1e8
#define RK3288_SDMMC_CON0		0x200
#define RK3288_SDMMC_CON1		0x204
#define RK3288_SDIO0_CON0		0x208
#define RK3288_SDIO0_CON1		0x20c
#define RK3288_SDIO1_CON0		0x210
#define RK3288_SDIO1_CON1		0x214
#define RK3288_EMMC_CON0		0x218
#define RK3288_EMMC_CON1		0x21c

enum rockchip_pll_type {
	pll_rk3066,
};

#define RK3066_PLL_RATE(_rate, _nr, _nf, _no)	\
{						\
	.rate	= _rate##U,			\
	.nr = _nr,				\
	.nf = _nf,				\
	.no = _no,				\
	.bwadj = (_nf >> 1),			\
}

#define RK3066_PLL_RATE_BWADJ(_rate, _nr, _nf, _no, _bw)	\
{								\
	.rate	= _rate##U,					\
	.nr = _nr,						\
	.nf = _nf,						\
	.no = _no,						\
	.bwadj = _bw,						\
}

struct rockchip_pll_rate_table {
	unsigned long rate;
	unsigned int nr;
	unsigned int nf;
	unsigned int no;
	unsigned int bwadj;
};

/**
 * struct rockchip_pll_clock: information about pll clock
 * @id: platform specific id of the clock.
 * @name: name of this pll clock.
 * @parent_name: name of the parent clock.
 * @flags: optional flags for basic clock.
 * @con_offset: offset of the register for configuring the PLL.
 * @mode_offset: offset of the register for configuring the PLL-mode.
 * @mode_shift: offset inside the mode-register for the mode of this pll.
 * @lock_shift: offset inside the lock register for the lock status.
 * @type: Type of PLL to be registered.
 * @pll_flags: hardware-specific flags
 * @rate_table: Table of usable pll rates
 *
 * Flags:
 * ROCKCHIP_PLL_SYNC_RATE - check rate parameters to match against the
 *	rate_table parameters and ajust them if necessary.
 */
struct rockchip_pll_clock {
	unsigned int		id;
	const char		*name;
	const char		**parent_names;
	u8			num_parents;
	unsigned long		flags;
	int			con_offset;
	int			mode_offset;
	int			mode_shift;
	int			lock_shift;
	enum rockchip_pll_type	type;
	u8			pll_flags;
	struct rockchip_pll_rate_table *rate_table;
};

#define ROCKCHIP_PLL_SYNC_RATE		BIT(0)

#define PLL(_type, _id, _name, _pnames, _flags, _con, _mode, _mshift,	\
		_lshift, _pflags, _rtable)				\
	{								\
		.id		= _id,					\
		.type		= _type,				\
		.name		= _name,				\
		.parent_names	= _pnames,				\
		.num_parents	= ARRAY_SIZE(_pnames),			\
		.flags		= CLK_GET_RATE_NOCACHE | _flags,	\
		.con_offset	= _con,					\
		.mode_offset	= _mode,				\
		.mode_shift	= _mshift,				\
		.lock_shift	= _lshift,				\
		.pll_flags	= _pflags,				\
		.rate_table	= _rtable,				\
	}

struct clk *rockchip_clk_register_pll(enum rockchip_pll_type pll_type,
		const char *name, const char **parent_names, u8 num_parents,
		void __iomem *base, int con_offset, int grf_lock_offset,
		int lock_shift, int reg_mode, int mode_shift,
		struct rockchip_pll_rate_table *rate_table,
		u8 clk_pll_flags);

struct rockchip_cpuclk_clksel {
	int reg;
	u32 val;
};

#define ROCKCHIP_CPUCLK_NUM_DIVIDERS	2
struct rockchip_cpuclk_rate_table {
	unsigned long prate;
	struct rockchip_cpuclk_clksel divs[ROCKCHIP_CPUCLK_NUM_DIVIDERS];
};

/**
 * struct rockchip_cpuclk_reg_data: describes register offsets and masks of the cpuclock
 * @core_reg:		register offset of the core settings register
 * @div_core_shift:	core divider offset used to divide the pll value
 * @div_core_mask:	core divider mask
 * @mux_core_shift:	offset of the core multiplexer
 */
struct rockchip_cpuclk_reg_data {
	int		core_reg;
	u8		div_core_shift;
	u32		div_core_mask;
	int		mux_core_reg;
	u8		mux_core_shift;
};

struct clk *rockchip_clk_register_cpuclk(const char *name,
			const char **parent_names, u8 num_parents,
			const struct rockchip_cpuclk_reg_data *reg_data,
			const struct rockchip_cpuclk_rate_table *rates,
			int nrates, void __iomem *reg_base);

struct clk *rockchip_clk_register_mmc(const char *name,
				const char **parent_names, u8 num_parents,
				void __iomem *reg, int shift);

#define PNAME(x) static const char *x[] __initconst

enum rockchip_clk_branch_type {
	branch_composite,
	branch_mux,
	branch_divider,
	branch_fraction_divider,
	branch_gate,
	branch_mmc,
};

struct rockchip_clk_branch {
	unsigned int			id;
	enum rockchip_clk_branch_type	branch_type;
	const char			*name;
	const char			**parent_names;
	u8				num_parents;
	unsigned long			flags;
	int				muxdiv_offset;
	u8				mux_shift;
	u8				mux_width;
	u8				mux_flags;
	u8				div_shift;
	u8				div_width;
	u8				div_flags;
	struct clk_div_table		*div_table;
	int				gate_offset;
	u8				gate_shift;
	u8				gate_flags;
};

#define COMPOSITE(_id, cname, pnames, f, mo, ms, mw, mf, ds, dw,\
		  df, go, gs, gf)				\
	{							\
		.id		= _id,				\
		.branch_type	= branch_composite,		\
		.name		= cname,			\
		.parent_names	= pnames,			\
		.num_parents	= ARRAY_SIZE(pnames),		\
		.flags		= f,				\
		.muxdiv_offset	= mo,				\
		.mux_shift	= ms,				\
		.mux_width	= mw,				\
		.mux_flags	= mf,				\
		.div_shift	= ds,				\
		.div_width	= dw,				\
		.div_flags	= df,				\
		.gate_offset	= go,				\
		.gate_shift	= gs,				\
		.gate_flags	= gf,				\
	}

#define COMPOSITE_NOMUX(_id, cname, pname, f, mo, ds, dw, df,	\
			go, gs, gf)				\
	{							\
		.id		= _id,				\
		.branch_type	= branch_composite,		\
		.name		= cname,			\
		.parent_names	= (const char *[]){ pname },	\
		.num_parents	= 1,				\
		.flags		= f,				\
		.muxdiv_offset	= mo,				\
		.div_shift	= ds,				\
		.div_width	= dw,				\
		.div_flags	= df,				\
		.gate_offset	= go,				\
		.gate_shift	= gs,				\
		.gate_flags	= gf,				\
	}

#define COMPOSITE_NOMUX_DIVTBL(_id, cname, pname, f, mo, ds, dw,\
			       df, dt, go, gs, gf)		\
	{							\
		.id		= _id,				\
		.branch_type	= branch_composite,		\
		.name		= cname,			\
		.parent_names	= (const char *[]){ pname },	\
		.num_parents	= 1,				\
		.flags		= f,				\
		.muxdiv_offset	= mo,				\
		.div_shift	= ds,				\
		.div_width	= dw,				\
		.div_flags	= df,				\
		.div_table	= dt,				\
		.gate_offset	= go,				\
		.gate_shift	= gs,				\
		.gate_flags	= gf,				\
	}

#define COMPOSITE_NODIV(_id, cname, pnames, f, mo, ms, mw, mf,	\
			go, gs, gf)				\
	{							\
		.id		= _id,				\
		.branch_type	= branch_composite,		\
		.name		= cname,			\
		.parent_names	= pnames,			\
		.num_parents	= ARRAY_SIZE(pnames),		\
		.flags		= f,				\
		.muxdiv_offset	= mo,				\
		.mux_shift	= ms,				\
		.mux_width	= mw,				\
		.mux_flags	= mf,				\
		.gate_offset	= go,				\
		.gate_shift	= gs,				\
		.gate_flags	= gf,				\
	}

#define COMPOSITE_NOGATE(_id, cname, pnames, f, mo, ms, mw, mf,	\
			 ds, dw, df)				\
	{							\
		.id		= _id,				\
		.branch_type	= branch_composite,		\
		.name		= cname,			\
		.parent_names	= pnames,			\
		.num_parents	= ARRAY_SIZE(pnames),		\
		.flags		= f,				\
		.muxdiv_offset	= mo,				\
		.mux_shift	= ms,				\
		.mux_width	= mw,				\
		.mux_flags	= mf,				\
		.div_shift	= ds,				\
		.div_width	= dw,				\
		.div_flags	= df,				\
		.gate_offset	= -1,				\
	}

#define COMPOSITE_FRAC(_id, cname, pname, f, mo, df, go, gs, gf)\
	{							\
		.id		= _id,				\
		.branch_type	= branch_fraction_divider,	\
		.name		= cname,			\
		.parent_names	= (const char *[]){ pname },	\
		.num_parents	= 1,				\
		.flags		= f,				\
		.muxdiv_offset	= mo,				\
		.div_shift	= 16,				\
		.div_width	= 16,				\
		.div_flags	= df,				\
		.gate_offset	= go,				\
		.gate_shift	= gs,				\
		.gate_flags	= gf,				\
	}

#define MUX(_id, cname, pnames, f, o, s, w, mf)			\
	{							\
		.id		= _id,				\
		.branch_type	= branch_mux,			\
		.name		= cname,			\
		.parent_names	= pnames,			\
		.num_parents	= ARRAY_SIZE(pnames),		\
		.flags		= f,				\
		.muxdiv_offset	= o,				\
		.mux_shift	= s,				\
		.mux_width	= w,				\
		.mux_flags	= mf,				\
		.gate_offset	= -1,				\
	}

#define DIV(_id, cname, pname, f, o, s, w, df)			\
	{							\
		.id		= _id,				\
		.branch_type	= branch_divider,		\
		.name		= cname,			\
		.parent_names	= (const char *[]){ pname },	\
		.num_parents	= 1,				\
		.flags		= f,				\
		.muxdiv_offset	= o,				\
		.div_shift	= s,				\
		.div_width	= w,				\
		.div_flags	= df,				\
		.gate_offset	= -1,				\
	}

#define DIVTBL(_id, cname, pname, f, o, s, w, df, dt)		\
	{							\
		.id		= _id,				\
		.branch_type	= branch_divider,		\
		.name		= cname,			\
		.parent_names	= (const char *[]){ pname },	\
		.num_parents	= 1,				\
		.flags		= f,				\
		.muxdiv_offset	= o,				\
		.div_shift	= s,				\
		.div_width	= w,				\
		.div_flags	= df,				\
		.div_table	= dt,				\
	}

#define GATE(_id, cname, pname, f, o, b, gf)			\
	{							\
		.id		= _id,				\
		.branch_type	= branch_gate,			\
		.name		= cname,			\
		.parent_names	= (const char *[]){ pname },	\
		.num_parents	= 1,				\
		.flags		= f,				\
		.gate_offset	= o,				\
		.gate_shift	= b,				\
		.gate_flags	= gf,				\
	}

#define MMC(_id, cname, pname, offset, shift)			\
	{							\
		.id		= _id,				\
		.branch_type	= branch_mmc,			\
		.name		= cname,			\
		.parent_names	= (const char *[]){ pname },	\
		.num_parents	= 1,				\
		.muxdiv_offset	= offset,			\
		.div_shift	= shift,			\
	}

void rockchip_clk_init(struct device_node *np, void __iomem *base,
		       unsigned long nr_clks);
struct regmap *rockchip_clk_get_grf(void);
void rockchip_clk_add_lookup(struct clk *clk, unsigned int id);
void rockchip_clk_register_branches(struct rockchip_clk_branch *clk_list,
				    unsigned int nr_clk);
void rockchip_clk_register_plls(struct rockchip_pll_clock *pll_list,
				unsigned int nr_pll, int grf_lock_offset);
void rockchip_clk_register_armclk(unsigned int lookup_id, const char *name,
			const char **parent_names, u8 num_parents,
			const struct rockchip_cpuclk_reg_data *reg_data,
			const struct rockchip_cpuclk_rate_table *rates,
			int nrates);
void rockchip_clk_protect_critical(const char *clocks[], int nclocks);

#endif
