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/*
* OMAP clock: data structure definitions, function prototypes, shared macros
*
* Copyright (C) 2004-2005, 2008-2010 Nokia Corporation
* Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
* Based on clocks.h by Tony Lindgren, Gordon McNutt and RidgeRun, Inc
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ARCH_ARM_OMAP_CLOCK_H
#define __ARCH_ARM_OMAP_CLOCK_H
#include <linux/list.h>
struct module;
struct clk;
struct clockdomain;
struct clkops {
int (*enable)(struct clk *);
void (*disable)(struct clk *);
void (*find_idlest)(struct clk *, void __iomem **,
u8 *, u8 *);
void (*find_companion)(struct clk *, void __iomem **,
u8 *);
};
#ifdef CONFIG_ARCH_OMAP2PLUS
struct clksel_rate {
u32 val;
u8 div;
u8 flags;
};
struct clksel {
struct clk *parent;
const struct clksel_rate *rates;
};
/**
* struct dpll_data - DPLL registers and integration data
* @mult_div1_reg: register containing the DPLL M and N bitfields
* @mult_mask: mask of the DPLL M bitfield in @mult_div1_reg
* @div1_mask: mask of the DPLL N bitfield in @mult_div1_reg
* @clk_bypass: struct clk pointer to the clock's bypass clock input
* @clk_ref: struct clk pointer to the clock's reference clock input
* @control_reg: register containing the DPLL mode bitfield
* @enable_mask: mask of the DPLL mode bitfield in @control_reg
* @rate_tolerance: maximum variance allowed from target rate (in Hz)
* @last_rounded_rate: cache of the last rate result of omap2_dpll_round_rate()
* @last_rounded_m: cache of the last M result of omap2_dpll_round_rate()
* @max_multiplier: maximum valid non-bypass multiplier value (actual)
* @last_rounded_n: cache of the last N result of omap2_dpll_round_rate()
* @min_divider: minimum valid non-bypass divider value (actual)
* @max_divider: maximum valid non-bypass divider value (actual)
* @modes: possible values of @enable_mask
* @autoidle_reg: register containing the DPLL autoidle mode bitfield
* @idlest_reg: register containing the DPLL idle status bitfield
* @autoidle_mask: mask of the DPLL autoidle mode bitfield in @autoidle_reg
* @freqsel_mask: mask of the DPLL jitter correction bitfield in @control_reg
* @idlest_mask: mask of the DPLL idle status bitfield in @idlest_reg
* @auto_recal_bit: bitshift of the driftguard enable bit in @control_reg
* @recal_en_bit: bitshift of the PRM_IRQENABLE_* bit for recalibration IRQs
* @recal_st_bit: bitshift of the PRM_IRQSTATUS_* bit for recalibration IRQs
* @flags: DPLL type/features (see below)
*
* Possible values for @flags:
* DPLL_J_TYPE: "J-type DPLL" (only some 36xx, 4xxx DPLLs)
* NO_DCO_SEL: don't program DCO (only for some J-type DPLLs)
* @freqsel_mask is only used on the OMAP34xx family and AM35xx.
*
* XXX Some DPLLs have multiple bypass inputs, so it's not technically
* correct to only have one @clk_bypass pointer.
*
* XXX @rate_tolerance should probably be deprecated - currently there
* don't seem to be any usecases for DPLL rounding that is not exact.
*
* XXX The runtime-variable fields (@last_rounded_rate, @last_rounded_m,
* @last_rounded_n) should be separated from the runtime-fixed fields
* and placed into a differenct structure, so that the runtime-fixed data
* can be placed into read-only space.
*/
struct dpll_data {
void __iomem *mult_div1_reg;
u32 mult_mask;
u32 div1_mask;
struct clk *clk_bypass;
struct clk *clk_ref;
void __iomem *control_reg;
u32 enable_mask;
unsigned int rate_tolerance;
unsigned long last_rounded_rate;
u16 last_rounded_m;
u16 max_multiplier;
u8 last_rounded_n;
u8 min_divider;
u8 max_divider;
u8 modes;
#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)
void __iomem *autoidle_reg;
void __iomem *idlest_reg;
u32 autoidle_mask;
u32 freqsel_mask;
u32 idlest_mask;
u8 auto_recal_bit;
u8 recal_en_bit;
u8 recal_st_bit;
u8 flags;
# endif
};
#endif
struct clk {
struct list_head node;
const struct clkops *ops;
const char *name;
struct clk *parent;
struct list_head children;
struct list_head sibling; /* node for children */
unsigned long rate;
void __iomem *enable_reg;
unsigned long (*recalc)(struct clk *);
int (*set_rate)(struct clk *, unsigned long);
long (*round_rate)(struct clk *, unsigned long);
void (*init)(struct clk *);
__u8 enable_bit;
__s8 usecount;
u8 fixed_div;
u8 flags;
#ifdef CONFIG_ARCH_OMAP2PLUS
void __iomem *clksel_reg;
u32 clksel_mask;
const struct clksel *clksel;
struct dpll_data *dpll_data;
const char *clkdm_name;
struct clockdomain *clkdm;
#else
__u8 rate_offset;
__u8 src_offset;
#endif
#if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS)
struct dentry *dent; /* For visible tree hierarchy */
#endif
};
struct cpufreq_frequency_table;
struct clk_functions {
int (*clk_enable)(struct clk *clk);
void (*clk_disable)(struct clk *clk);
long (*clk_round_rate)(struct clk *clk, unsigned long rate);
int (*clk_set_rate)(struct clk *clk, unsigned long rate);
int (*clk_set_parent)(struct clk *clk, struct clk *parent);
void (*clk_allow_idle)(struct clk *clk);
void (*clk_deny_idle)(struct clk *clk);
void (*clk_disable_unused)(struct clk *clk);
#ifdef CONFIG_CPU_FREQ
void (*clk_init_cpufreq_table)(struct cpufreq_frequency_table **);
void (*clk_exit_cpufreq_table)(struct cpufreq_frequency_table **);
#endif
};
extern int mpurate;
extern int clk_init(struct clk_functions *custom_clocks);
extern void clk_preinit(struct clk *clk);
extern int clk_register(struct clk *clk);
extern void clk_reparent(struct clk *child, struct clk *parent);
extern void clk_unregister(struct clk *clk);
extern void propagate_rate(struct clk *clk);
extern void recalculate_root_clocks(void);
extern unsigned long followparent_recalc(struct clk *clk);
extern void clk_enable_init_clocks(void);
unsigned long omap_fixed_divisor_recalc(struct clk *clk);
#ifdef CONFIG_CPU_FREQ
extern void clk_init_cpufreq_table(struct cpufreq_frequency_table **table);
extern void clk_exit_cpufreq_table(struct cpufreq_frequency_table **table);
#endif
extern struct clk *omap_clk_get_by_name(const char *name);
extern const struct clkops clkops_null;
extern struct clk dummy_ck;
/* Clock flags */
#define ENABLE_REG_32BIT (1 << 0) /* Use 32-bit access */
#define CLOCK_IDLE_CONTROL (1 << 1)
#define CLOCK_NO_IDLE_PARENT (1 << 2)
#define ENABLE_ON_INIT (1 << 3) /* Enable upon framework init */
#define INVERT_ENABLE (1 << 4) /* 0 enables, 1 disables */
/* Clksel_rate flags */
#define RATE_IN_242X (1 << 0)
#define RATE_IN_243X (1 << 1)
#define RATE_IN_3XXX (1 << 2) /* rates common to all OMAP3 */
#define RATE_IN_3430ES2 (1 << 3) /* 3430ES2 rates only */
#define RATE_IN_36XX (1 << 4)
#define RATE_IN_4430 (1 << 5)
#define RATE_IN_24XX (RATE_IN_242X | RATE_IN_243X)
#define RATE_IN_3430ES2PLUS (RATE_IN_3430ES2 | RATE_IN_36XX)
#endif
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