clkc.h

/*
 * Copyright (c) 2015 Endless Mobile, Inc.
 * Author: Carlo Caione <carlo@endlessm.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef __CLKC_H
#define __CLKC_H

#define PMASK(width)			GENMASK(width - 1, 0)
#define SETPMASK(width, shift)		GENMASK(shift + width - 1, shift)
#define CLRPMASK(width, shift)		(~SETPMASK(width, shift))

#define PARM_GET(width, shift, reg)					\
	(((reg) & SETPMASK(width, shift)) >> (shift))
#define PARM_SET(width, shift, reg, val)				\
	(((reg) & CLRPMASK(width, shift)) | (val << (shift)))

#define MESON_PARM_APPLICABLE(p)		(!!((p)->width))

struct parm {
	u16	reg_off;
	u8	shift;
	u8	width;
};

#define PARM(_r, _s, _w)                                               \
{                                                                      \
	.reg_off        = (_r),                                        \
	.shift          = (_s),                                        \
	.width          = (_w),                                        \
}                                                                      \

struct pll_rate_table {
	unsigned long	rate;
	u16		m;
	u16		n;
	u16		od;
};
#define PLL_RATE(_r, _m, _n, _od)					\
	{								\
		.rate		= (_r),					\
		.m		= (_m),					\
		.n		= (_n),					\
		.od		= (_od),				\
	}								\

struct meson_clk_pll {
	struct clk_hw hw;
	void __iomem *base;
	struct parm m;
	struct parm n;
	struct parm od;
	const struct pll_rate_table *rate_table;
	unsigned int rate_count;
	spinlock_t *lock;
};

#define to_meson_clk_pll(_hw) container_of(_hw, struct meson_clk_pll, hw)

struct composite_conf {
	struct parm		mux_parm;
	struct parm		div_parm;
	struct parm		gate_parm;
	struct clk_div_table	*div_table;
	u32			*mux_table;
	u8			mux_flags;
	u8			div_flags;
	u8			gate_flags;
};

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

enum clk_type {
	CLK_COMPOSITE,
	CLK_CPU,
};

struct clk_conf {
	u16				reg_off;
	enum clk_type			clk_type;
	unsigned int			clk_id;
	const char			*clk_name;
	const char			**clks_parent;
	int				num_parents;
	unsigned long			flags;
	union {
		const struct composite_conf		*composite;
		const struct clk_div_table	*div_table;
	} conf;
};

#define CPU(_ro, _ci, _cn, _cp, _dt)					\
	{								\
		.reg_off			= (_ro),		\
		.clk_type			= CLK_CPU,		\
		.clk_id				= (_ci),		\
		.clk_name			= (_cn),		\
		.clks_parent			= (_cp),		\
		.num_parents			= ARRAY_SIZE(_cp),	\
		.conf.div_table			= (_dt),		\
	}								\

#define COMPOSITE(_ro, _ci, _cn, _cp, _f, _c)				\
	{								\
		.reg_off			= (_ro),		\
		.clk_type			= CLK_COMPOSITE,	\
		.clk_id				= (_ci),		\
		.clk_name			= (_cn),		\
		.clks_parent			= (_cp),		\
		.num_parents			= ARRAY_SIZE(_cp),	\
		.flags				= (_f),			\
		.conf.composite			= (_c),			\
	}								\

struct clk **meson_clk_init(struct device_node *np, unsigned long nr_clks);
void meson_clk_register_clks(const struct clk_conf *clk_confs,
			     unsigned int nr_confs, void __iomem *clk_base);
struct clk *meson_clk_register_cpu(const struct clk_conf *clk_conf,
				   void __iomem *reg_base, spinlock_t *lock);

/* shared data */
extern spinlock_t clk_lock;

/* clk_ops */
extern const struct clk_ops meson_clk_pll_ro_ops;
extern const struct clk_ops meson_clk_pll_ops;

#endif /* __CLKC_H */