platform/msm_shared/include/clock-local.h - kernel/lk - Gitiles

 /*
  * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *   * Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  *   * Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
  *     documentation and/or other materials provided with the distribution.
  *   * Neither the name of The Linux Foundation nor
  *     the names of its contributors may be used to endorse or promote
  *     products derived from this software without specific prior written
  *     permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #ifndef CLOCK_LOCAL_H
 #define CLOCK_LOCAL_H

 struct clk;
 struct clk_ops;

 #define FREQ_END	(UINT_MAX-1)
 #define F_END \
 	{ \
 		.freq_hz = FREQ_END, \
 	}

 #define container_of(ptr, type, member) \
 	((type *)((addr_t)(ptr) - offsetof(type, member)))

 /*
  * Bit manipulation macros
  */
 #define BM(msb, lsb)	(((((uint32_t)-1) << (31-msb)) >> (31-msb+lsb)) << lsb)
 #define BVAL(msb, lsb, val)	(((val) << lsb) & BM(msb, lsb))

 /*
  * Halt/Status Checking Mode Macros
  */
 #define HALT            0   /* Bit pol: 1 = halted */
 #define NOCHECK         1   /* No bit to check, do nothing */
 #define HALT_VOTED      2   /* Bit pol: 1 = halted; delay on disable */
 #define ENABLE          3   /* Bit pol: 1 = running */
 #define ENABLE_VOTED    4   /* Bit pol: 1 = running; delay on disable */
 #define DELAY           5   /* No bit to check, just delay */

 /*
  * Variables from clock-local driver
  */
 extern struct fixed_clk gnd_clk;

 /*
  * Generic frequency-definition structs and macros
  */
 struct clk_freq_tbl {
 	const uint32_t	freq_hz;
 	struct clk	*src_clk;
 	const uint32_t	md_val;
 	const uint32_t	ns_val;
 	const uint32_t	ctl_val;
 	uint32_t	mnd_en_mask;
 	void		*const extra_freq_data;
 };

 extern struct clk_freq_tbl local_dummy_freq;

 /* Some clocks have two banks to avoid glitches when switching frequencies.
  * The unused bank is programmed while running on the other bank, and
  * switched to afterwards. The following two structs describe the banks. */
 struct bank_mask_info {
 	void *const md_reg;
 	const uint32_t	ns_mask;
 	const uint32_t	rst_mask;
 	const uint32_t	mnd_en_mask;
 	const uint32_t	mode_mask;
 };

 struct bank_masks {
 	const uint32_t			bank_sel_mask;
 	const struct bank_mask_info	bank0_mask;
 	const struct bank_mask_info	bank1_mask;
 };

 /**
  * struct branch - branch on/off
  * @ctl_reg: clock control register
  * @en_mask: ORed with @ctl_reg to enable the clock
  * @halt_reg: halt register
  * @halt_check: type of halt check to perform
  * @halt_bit: ANDed with @halt_reg to test for clock halted
  * @reset_reg: reset register
  * @reset_mask: ORed with @reset_reg to reset the clock domain
  */
 struct branch {
 	void *const ctl_reg;
 	const uint32_t en_mask;

 	void *const halt_reg;
 	const uint16_t halt_check;
 	const uint16_t halt_bit;

 	void *const reset_reg;
 	const uint32_t reset_mask;
 };

 /*
  * Generic clock-definition struct and macros
  */
 struct rcg_clk {
 	bool		enabled;
 	void		*const ns_reg;
 	void		*const md_reg;

 	const uint32_t	root_en_mask;
 	uint32_t	ns_mask;
 	const uint32_t	ctl_mask;
 	struct bank_masks *const bank_masks;

 	void   (*set_rate)(struct rcg_clk *, struct clk_freq_tbl *);
 	struct clk_freq_tbl *freq_tbl;
 	struct clk_freq_tbl *current_freq;

 	struct clk *depends;
 	struct branch	b;
 	struct clk	c;
 };

 static inline struct rcg_clk *to_rcg_clk(struct clk *clk)
 {
 	return container_of(clk, struct rcg_clk, c);
 }

 /**
  * struct fixed_clk - fixed rate clock (used for crystal oscillators)
  * @rate: output rate
  * @c: clk
  */
 struct fixed_clk {
 	unsigned long rate;
 	struct clk c;
 };

 static inline struct fixed_clk *to_fixed_clk(struct clk *clk)
 {
 	return container_of(clk, struct fixed_clk, c);
 }

 static inline unsigned fixed_clk_get_rate(struct clk *clk)
 {
 	struct fixed_clk *f = to_fixed_clk(clk);
 	return f->rate;
 }

 /**
  * struct branch_clk - branch
  * @enabled: true if clock is on, false otherwise
  * @b: branch
  * @parent: clock source
  * @c: clk
  *
  * An on/off switch with a rate derived from the parent.
  */
 struct branch_clk {
 	bool enabled;
 	struct branch b;
 	struct clk *parent;
 	struct clk c;
 };

 static inline struct branch_clk *to_branch_clk(struct clk *clk)
 {
 	return container_of(clk, struct branch_clk, c);
 }

 int branch_clk_enable(struct clk *clk);
 void branch_clk_disable(struct clk *clk);
 struct clk *branch_clk_get_parent(struct clk *clk);
 int branch_clk_set_parent(struct clk *clk, struct clk *parent);
 int branch_clk_is_enabled(struct clk *clk);
 void branch_clk_auto_off(struct clk *clk);
 int branch_clk_reset(struct clk *c, enum clk_reset_action action);

 /**
  * struct measure_clk - for rate measurement debug use
  * @sample_ticks: sample period in reference clock ticks
  * @multiplier: measurement scale-up factor
  * @divider: measurement scale-down factor
  * @c: clk
 */
 struct measure_clk {
 	uint64_t sample_ticks;
 	uint32_t multiplier;
 	uint32_t divider;
 	struct clk c;
 };

 extern struct clk_ops clk_ops_measure;

 static inline struct measure_clk *to_measure_clk(struct clk *clk)
 {
 	return container_of(clk, struct measure_clk, c);
 }

 /*
  * clk_ops APIs
  */
 int local_clk_enable(struct clk *c);
 void local_clk_disable(struct clk *c);
 int local_clk_set_rate(struct clk *c, unsigned rate);
 unsigned local_clk_get_rate(struct clk *c);
 int local_clk_is_enabled(struct clk *clk);
 long local_clk_round_rate(struct clk *c, unsigned rate);
 struct clk *local_clk_get_parent(struct clk *clk);

 /*
  * Generic set-rate implementations
  */
 void set_rate_mnd(struct rcg_clk *clk, struct clk_freq_tbl *nf);
 void set_rate_mnd_banked(struct rcg_clk *clk, struct clk_freq_tbl *nf);
 void set_rate_nop(struct rcg_clk *clk, struct clk_freq_tbl *nf);
 #endif
	/*
	* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are met:
	* * Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* * Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	* * Neither the name of The Linux Foundation nor
	* the names of its contributors may be used to endorse or promote
	* products derived from this software without specific prior written
	* permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	* NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
	* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
	* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#ifndef CLOCK_LOCAL_H
	#define CLOCK_LOCAL_H

	struct clk;
	struct clk_ops;

	#define FREQ_END (UINT_MAX-1)
	#define F_END \
	{ \
	.freq_hz = FREQ_END, \
	}

	#define container_of(ptr, type, member) \
	((type *)((addr_t)(ptr) - offsetof(type, member)))

	/*
	* Bit manipulation macros
	*/
	#define BM(msb, lsb) (((((uint32_t)-1) << (31-msb)) >> (31-msb+lsb)) << lsb)
	#define BVAL(msb, lsb, val) (((val) << lsb) & BM(msb, lsb))

	/*
	* Halt/Status Checking Mode Macros
	*/
	#define HALT 0 /* Bit pol: 1 = halted */
	#define NOCHECK 1 /* No bit to check, do nothing */
	#define HALT_VOTED 2 /* Bit pol: 1 = halted; delay on disable */
	#define ENABLE 3 /* Bit pol: 1 = running */
	#define ENABLE_VOTED 4 /* Bit pol: 1 = running; delay on disable */
	#define DELAY 5 /* No bit to check, just delay */

	/*
	* Variables from clock-local driver
	*/
	extern struct fixed_clk gnd_clk;

	/*
	* Generic frequency-definition structs and macros
	*/
	struct clk_freq_tbl {
	const uint32_t freq_hz;
	struct clk *src_clk;
	const uint32_t md_val;
	const uint32_t ns_val;
	const uint32_t ctl_val;
	uint32_t mnd_en_mask;
	void *const extra_freq_data;
	};

	extern struct clk_freq_tbl local_dummy_freq;

	/* Some clocks have two banks to avoid glitches when switching frequencies.
	* The unused bank is programmed while running on the other bank, and
	* switched to afterwards. The following two structs describe the banks. */
	struct bank_mask_info {
	void *const md_reg;
	const uint32_t ns_mask;
	const uint32_t rst_mask;
	const uint32_t mnd_en_mask;
	const uint32_t mode_mask;
	};

	struct bank_masks {
	const uint32_t bank_sel_mask;
	const struct bank_mask_info bank0_mask;
	const struct bank_mask_info bank1_mask;
	};

	/**
	* struct branch - branch on/off
	* @ctl_reg: clock control register
	* @en_mask: ORed with @ctl_reg to enable the clock
	* @halt_reg: halt register
	* @halt_check: type of halt check to perform
	* @halt_bit: ANDed with @halt_reg to test for clock halted
	* @reset_reg: reset register
	* @reset_mask: ORed with @reset_reg to reset the clock domain
	*/
	struct branch {
	void *const ctl_reg;
	const uint32_t en_mask;

	void *const halt_reg;
	const uint16_t halt_check;
	const uint16_t halt_bit;

	void *const reset_reg;
	const uint32_t reset_mask;
	};

	/*
	* Generic clock-definition struct and macros
	*/
	struct rcg_clk {
	bool enabled;
	void *const ns_reg;
	void *const md_reg;

	const uint32_t root_en_mask;
	uint32_t ns_mask;
	const uint32_t ctl_mask;
	struct bank_masks *const bank_masks;

	void (set_rate)(struct rcg_clk , struct clk_freq_tbl *);
	struct clk_freq_tbl *freq_tbl;
	struct clk_freq_tbl *current_freq;

	struct clk *depends;
	struct branch b;
	struct clk c;
	};

	static inline struct rcg_clk to_rcg_clk(struct clk clk)
	{
	return container_of(clk, struct rcg_clk, c);
	}

	/**
	* struct fixed_clk - fixed rate clock (used for crystal oscillators)
	* @rate: output rate
	* @c: clk
	*/
	struct fixed_clk {
	unsigned long rate;
	struct clk c;
	};

	static inline struct fixed_clk to_fixed_clk(struct clk clk)
	{
	return container_of(clk, struct fixed_clk, c);
	}

	static inline unsigned fixed_clk_get_rate(struct clk *clk)
	{
	struct fixed_clk *f = to_fixed_clk(clk);
	return f->rate;
	}

	/**
	* struct branch_clk - branch
	* @enabled: true if clock is on, false otherwise
	* @b: branch
	* @parent: clock source
	* @c: clk
	*
	* An on/off switch with a rate derived from the parent.
	*/
	struct branch_clk {
	bool enabled;
	struct branch b;
	struct clk *parent;
	struct clk c;
	};

	static inline struct branch_clk to_branch_clk(struct clk clk)
	{
	return container_of(clk, struct branch_clk, c);
	}

	int branch_clk_enable(struct clk *clk);
	void branch_clk_disable(struct clk *clk);
	struct clk branch_clk_get_parent(struct clk clk);
	int branch_clk_set_parent(struct clk clk, struct clk parent);
	int branch_clk_is_enabled(struct clk *clk);
	void branch_clk_auto_off(struct clk *clk);
	int branch_clk_reset(struct clk *c, enum clk_reset_action action);

	/**
	* struct measure_clk - for rate measurement debug use
	* @sample_ticks: sample period in reference clock ticks
	* @multiplier: measurement scale-up factor
	* @divider: measurement scale-down factor
	* @c: clk
	*/
	struct measure_clk {
	uint64_t sample_ticks;
	uint32_t multiplier;
	uint32_t divider;
	struct clk c;
	};

	extern struct clk_ops clk_ops_measure;

	static inline struct measure_clk to_measure_clk(struct clk clk)
	{
	return container_of(clk, struct measure_clk, c);
	}

	/*
	* clk_ops APIs
	*/
	int local_clk_enable(struct clk *c);
	void local_clk_disable(struct clk *c);
	int local_clk_set_rate(struct clk *c, unsigned rate);
	unsigned local_clk_get_rate(struct clk *c);
	int local_clk_is_enabled(struct clk *clk);
	long local_clk_round_rate(struct clk *c, unsigned rate);
	struct clk local_clk_get_parent(struct clk clk);

	/*
	* Generic set-rate implementations
	*/
	void set_rate_mnd(struct rcg_clk clk, struct clk_freq_tbl nf);
	void set_rate_mnd_banked(struct rcg_clk clk, struct clk_freq_tbl nf);
	void set_rate_nop(struct rcg_clk clk, struct clk_freq_tbl nf);
	#endif