/*
* TI clock drivers support
*
* Copyright (C) 2013 Texas Instruments, 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.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __LINUX_CLK_TI_H__
#define __LINUX_CLK_TI_H__
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
/**
* 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
* @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()
* @last_rounded_m4xen: cache of the last M4X result of
* omap4_dpll_regm4xen_round_rate()
* @last_rounded_lpmode: cache of the last lpmode result of
* omap4_dpll_lpmode_recalc()
* @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
* @dcc_mask: mask of the DPLL DCC correction bitfield @mult_div1_reg
* @dcc_rate: rate atleast which DCC @dcc_mask must be set
* @idlest_mask: mask of the DPLL idle status bitfield in @idlest_reg
* @lpmode_mask: mask of the DPLL low-power mode bitfield in @control_reg
* @m4xen_mask: mask of the DPLL M4X multiplier bitfield in @control_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)
*
* @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 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 different 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 long last_rounded_rate;
u16 last_rounded_m;
u8 last_rounded_m4xen;
u8 last_rounded_lpmode;
u16 max_multiplier;
u8 last_rounded_n;
u8 min_divider;
u16 max_divider;
u8 modes;
void __iomem *autoidle_reg;
void __iomem *idlest_reg;
u32 autoidle_mask;
u32 freqsel_mask;
u32 idlest_mask;
u32 dco_mask;
u32 sddiv_mask;
u32 dcc_mask;
unsigned long dcc_rate;
u32 lpmode_mask;
u32 m4xen_mask;
u8 auto_recal_bit;
u8 recal_en_bit;
u8 recal_st_bit;
u8 flags;
};
struct clk_hw_omap;
/**
* struct clk_hw_omap_ops - OMAP clk ops
* @find_idlest: find idlest register information for a clock
* @find_companion: find companion clock register information for a clock,
* basically converts CM_ICLKEN* <-> CM_FCLKEN*
* @allow_idle: enables autoidle hardware functionality for a clock
* @deny_idle: prevent autoidle hardware functionality for a clock
*/
struct clk_hw_omap_ops {
void (*find_idlest)(struct clk_hw_omap *oclk,
void __iomem **idlest_reg,
u8 *idlest_bit, u8 *idlest_val);
void (*find_companion)(struct clk_hw_omap *oclk,
void __iomem **other_reg,
u8 *other_bit);
void (*allow_idle)(struct clk_hw_omap *oclk);
void (*deny_idle)(struct clk_hw_omap *oclk);
};
/**
* struct clk_hw_omap - OMAP struct clk
* @node: list_head connecting this clock into the full clock list
* @enable_reg: register to write to enable the clock (see @enable_bit)
* @enable_bit: bitshift to write to enable/disable the clock (see @enable_reg)
* @flags: see "struct clk.flags possibilities" above
* @clksel_reg: for clksel clks, register va containing src/divisor select
* @clksel_mask: bitmask in @clksel_reg for the src/divisor selector
* @clksel: for clksel clks, pointer to struct clksel for this clock
* @dpll_data: for DPLLs, pointer to struct dpll_data for this clock
* @clkdm_name: clockdomain name that this clock is contained in
* @clkdm: pointer to struct clockdomain, resolved from @clkdm_name at runtime
* @ops: clock ops for this clock
*/
struct clk_hw_omap {
struct clk_hw hw;
struct list_head node;
unsigned long fixed_rate;
u8 fixed_div;
void __iomem *enable_reg;
u8 enable_bit;
u8 flags;
void __iomem *clksel_reg;
u32 clksel_mask;
const struct clksel *clksel;
struct dpll_data *dpll_data;
const char *clkdm_name;
struct clockdomain *clkdm;
const struct clk_hw_omap_ops *ops;
};
/*
* struct clk_hw_omap.flags possibilities
*
* XXX document the rest of the clock flags here
*
* ENABLE_REG_32BIT: (OMAP1 only) clock control register must be accessed
* with 32bit ops, by default OMAP1 uses 16bit ops.
* CLOCK_IDLE_CONTROL: (OMAP1 only) clock has autoidle support.
* CLOCK_NO_IDLE_PARENT: (OMAP1 only) when clock is enabled, its parent
* clock is put to no-idle mode.
* ENABLE_ON_INIT: Clock is enabled on init.
* INVERT_ENABLE: By default, clock enable bit behavior is '1' enable, '0'
* disable. This inverts the behavior making '0' enable and '1' disable.
* CLOCK_CLKOUTX2: (OMAP4 only) DPLL CLKOUT and CLKOUTX2 GATE_CTRL
* bits share the same register. This flag allows the
* omap4_dpllmx*() code to determine which GATE_CTRL bit field
* should be used. This is a temporary solution - a better approach
* would be to associate clock type-specific data with the clock,
* similar to the struct dpll_data approach.
* MEMMAP_ADDRESSING: Use memmap addressing to access clock registers.
*/
#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 */
#define CLOCK_CLKOUTX2 (1 << 5)
#define MEMMAP_ADDRESSING (1 << 6)
/* CM_CLKEN_PLL*.EN* bit values - not all are available for every DPLL */
#define DPLL_LOW_POWER_STOP 0x1
#define DPLL_LOW_POWER_BYPASS 0x5
#define DPLL_LOCKED 0x7
/* DPLL Type and DCO Selection Flags */
#define DPLL_J_TYPE 0x1
/* Static memmap indices */
enum {
TI_CLKM_CM = 0,
TI_CLKM_CM2,
TI_CLKM_PRM,
TI_CLKM_SCRM,
TI_CLKM_CTRL,
CLK_MAX_MEMMAPS
};
/**
* struct clk_omap_reg - OMAP register declaration
* @offset: offset from the master IP module base address
* @index: index of the master IP module
*/
struct clk_omap_reg {
u16 offset;
u16 index;
};
/**
* struct ti_clk_ll_ops - low-level ops for clocks
* @clk_readl: pointer to register read function
* @clk_writel: pointer to register write function
* @clkdm_clk_enable: pointer to clockdomain enable function
* @clkdm_clk_disable: pointer to clockdomain disable function
* @cm_wait_module_ready: pointer to CM module wait ready function
* @cm_split_idlest_reg: pointer to CM module function to split idlest reg
*
* Low-level ops are generally used by the basic clock types (clk-gate,
* clk-mux, clk-divider etc.) to provide support for various low-level
* hadrware interfaces (direct MMIO, regmap etc.), and is initialized
* by board code. Low-level ops also contain some other platform specific
* operations not provided directly by clock drivers.
*/
struct ti_clk_ll_ops {
u32 (*clk_readl)(void __iomem *reg);
void (*clk_writel)(u32 val, void __iomem *reg);
int (*clkdm_clk_enable)(struct clockdomain *clkdm, struct clk *clk);
int (*clkdm_clk_disable)(struct clockdomain *clkdm,
struct clk *clk);
int (*cm_wait_module_ready)(u8 part, s16 prcm_mod, u16 idlest_reg,
u8 idlest_shift);
int (*cm_split_idlest_reg)(void __iomem *idlest_reg, s16 *prcm_inst,
u8 *idlest_reg_id);
};
#define to_clk_hw_omap(_hw) container_of(_hw, struct clk_hw_omap, hw)
void omap2_init_clk_clkdm(struct clk_hw *clk);
int omap2_clk_disable_autoidle_all(void);
int omap2_clk_enable_autoidle_all(void);
int omap2_clk_allow_idle(struct clk *clk);
int omap2_clk_deny_idle(struct clk *clk);
unsigned long omap2_dpllcore_recalc(struct clk_hw *hw,
unsigned long parent_rate);
int omap2_reprogram_dpllcore(struct clk_hw *clk, unsigned long rate,
unsigned long parent_rate);
void omap2xxx_clkt_dpllcore_init(struct clk_hw *hw);
void omap2xxx_clkt_vps_init(void);
unsigned long omap2_get_dpll_rate(struct clk_hw_omap *clk);
void ti_dt_clk_init_retry_clks(void);
void ti_dt_clockdomains_setup(void);
int ti_clk_setup_ll_ops(struct ti_clk_ll_ops *ops);
struct regmap;
int omap2_clk_provider_init(struct device_node *parent, int index,
struct regmap *syscon, void __iomem *mem);
void omap2_clk_legacy_provider_init(int index, void __iomem *mem);
int omap3430_dt_clk_init(void);
int omap3630_dt_clk_init(void);
int am35xx_dt_clk_init(void);
int dm814x_dt_clk_init(void);
int dm816x_dt_clk_init(void);
int omap4xxx_dt_clk_init(void);
int omap5xxx_dt_clk_init(void);
int dra7xx_dt_clk_init(void);
int am33xx_dt_clk_init(void);
int am43xx_dt_clk_init(void);
int omap2420_dt_clk_init(void);
int omap2430_dt_clk_init(void);
struct ti_clk_features {
u32 flags;
long fint_min;
long fint_max;
long fint_band1_max;
long fint_band2_min;
u8 dpll_bypass_vals;
u8 cm_idlest_val;
};
#define TI_CLK_DPLL_HAS_FREQSEL BIT(0)
#define TI_CLK_DPLL4_DENY_REPROGRAM BIT(1)
#define TI_CLK_DISABLE_CLKDM_CONTROL BIT(2)
void ti_clk_setup_features(struct ti_clk_features *features);
const struct ti_clk_features *ti_clk_get_features(void);
extern const struct clk_hw_omap_ops clkhwops_omap2xxx_dpll;
#ifdef CONFIG_ATAGS
int omap3430_clk_legacy_init(void);
int omap3430es1_clk_legacy_init(void);
int omap36xx_clk_legacy_init(void);
int am35xx_clk_legacy_init(void);
#else
static inline int omap3430_clk_legacy_init(void) { return -ENXIO; }
static inline int omap3430es1_clk_legacy_init(void) { return -ENXIO; }
static inline int omap36xx_clk_legacy_init(void) { return -ENXIO; }
static inline int am35xx_clk_legacy_init(void) { return -ENXIO; }
#endif
#endif