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/*
* OMAP Voltage Management Routines
*
* Author: Thara Gopinath <thara@ti.com>
*
* Copyright (C) 2009 Texas Instruments, Inc.
* Thara Gopinath <thara@ti.com>
*
* 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_MACH_OMAP2_VOLTAGE_H
#define __ARCH_ARM_MACH_OMAP2_VOLTAGE_H
#include <linux/err.h>
#include "vc.h"
#include "vp.h"
struct powerdomain;
/* XXX document */
#define VOLTSCALE_VPFORCEUPDATE 1
#define VOLTSCALE_VCBYPASS 2
/*
* OMAP3 GENERIC setup times. Revisit to see if these needs to be
* passed from board or PMIC file
*/
#define OMAP3_CLKSETUP 0xff
#define OMAP3_VOLTOFFSET 0xff
#define OMAP3_VOLTSETUP2 0xff
struct omap_vdd_info;
/**
* struct omap_vfsm_instance - per-voltage manager FSM register/bitfield
* data
* @voltsetup_mask: SETUP_TIME* bitmask in the PRM_VOLTSETUP* register
* @voltsetup_reg: register offset of PRM_VOLTSETUP from PRM base
* @voltsetup_shift: SETUP_TIME* field shift in the PRM_VOLTSETUP* register
*
* XXX What about VOLTOFFSET/VOLTCTRL?
* XXX It is not necessary to have both a _mask and a _shift for the same
* bitfield - remove one!
*/
struct omap_vfsm_instance {
u32 voltsetup_mask;
u8 voltsetup_reg;
u8 voltsetup_shift;
};
/**
* struct voltagedomain - omap voltage domain global structure.
* @name: Name of the voltage domain which can be used as a unique identifier.
* @scalable: Whether or not this voltage domain is scalable
* @node: list_head linking all voltage domains
* @pwrdm_node: list_head linking all powerdomains in this voltagedomain
* @vdd: to be removed
* @pwrdms: powerdomains in this voltagedomain
* @scale: function used to scale the voltage of the voltagedomain
* @curr_volt: current nominal voltage for this voltage domain
*/
struct voltagedomain {
char *name;
bool scalable;
struct list_head node;
struct list_head pwrdm_list;
struct omap_vc_channel *vc;
const struct omap_vfsm_instance *vfsm;
struct omap_vp_instance *vp;
struct omap_voltdm_pmic *pmic;
/* VC/VP register access functions: SoC specific */
u32 (*read) (u8 offset);
void (*write) (u32 val, u8 offset);
u32 (*rmw)(u32 mask, u32 bits, u8 offset);
union {
const char *name;
u32 rate;
} sys_clk;
int (*scale) (struct voltagedomain *voltdm,
unsigned long target_volt);
u32 curr_volt;
struct omap_vdd_info *vdd;
struct dentry *debug_dir;
};
/**
* struct omap_volt_data - Omap voltage specific data.
* @voltage_nominal: The possible voltage value in uV
* @sr_efuse_offs: The offset of the efuse register(from system
* control module base address) from where to read
* the n-target value for the smartreflex module.
* @sr_errminlimit: Error min limit value for smartreflex. This value
* differs at differnet opp and thus is linked
* with voltage.
* @vp_errorgain: Error gain value for the voltage processor. This
* field also differs according to the voltage/opp.
*/
struct omap_volt_data {
u32 volt_nominal;
u32 sr_efuse_offs;
u8 sr_errminlimit;
u8 vp_errgain;
};
/*
* Introduced in OMAP4, is a concept of a default channel - in OMAP4, this
* channel is MPU, all other domains such as IVA/CORE, could optionally
* link their i2c reg configuration to use MPU channel's configuration if
* required. To do this, mark in the PMIC structure's
* i2c_slave_addr, volt_reg_addr,cmd_reg_addr with this macro.
*/
#define USE_DEFAULT_CHANNEL_I2C_PARAM 0x8000
/* Min and max voltages from OMAP perspective */
#define OMAP3430_VP1_VLIMITTO_VDDMIN 850000
#define OMAP3430_VP1_VLIMITTO_VDDMAX 1425000
#define OMAP3430_VP2_VLIMITTO_VDDMIN 900000
#define OMAP3430_VP2_VLIMITTO_VDDMAX 1150000
#define OMAP3630_VP1_VLIMITTO_VDDMIN 900000
#define OMAP3630_VP1_VLIMITTO_VDDMAX 1350000
#define OMAP3630_VP2_VLIMITTO_VDDMIN 900000
#define OMAP3630_VP2_VLIMITTO_VDDMAX 1200000
#define OMAP4_VP_MPU_VLIMITTO_VDDMIN 830000
#define OMAP4_VP_MPU_VLIMITTO_VDDMAX 1410000
#define OMAP4_VP_IVA_VLIMITTO_VDDMIN 830000
#define OMAP4_VP_IVA_VLIMITTO_VDDMAX 1260000
#define OMAP4_VP_CORE_VLIMITTO_VDDMIN 830000
#define OMAP4_VP_CORE_VLIMITTO_VDDMAX 1200000
#define OMAP4_VP_CONFIG_ERROROFFSET 0x00
#define OMAP4_VP_VSTEPMIN_VSTEPMIN 0x01
#define OMAP4_VP_VSTEPMAX_VSTEPMAX 0x04
#define OMAP4_VP_VLIMITTO_TIMEOUT_US 200
/**
* struct omap_voltdm_pmic - PMIC specific data required by voltage driver.
* @slew_rate: PMIC slew rate (in uv/us)
* @step_size: PMIC voltage step size (in uv)
* @i2c_high_speed: whether VC uses I2C high-speed mode to PMIC
* @i2c_mcode: master code value for I2C high-speed preamble transmission
* @vsel_to_uv: PMIC API to convert vsel value to actual voltage in uV.
* @uv_to_vsel: PMIC API to convert voltage in uV to vsel value.
* @i2c_hscll_low: PMIC interface speed config for highspeed mode (T low)
* @i2c_hscll_high: PMIC interface speed config for highspeed mode (T high)
* @i2c_scll_low: PMIC interface speed config for fullspeed mode (T low)
* @i2c_scll_high: PMIC interface speed config for fullspeed mode (T high)
*/
struct omap_voltdm_pmic {
int slew_rate;
int step_size;
u32 on_volt;
u32 onlp_volt;
u32 ret_volt;
u32 off_volt;
u16 volt_setup_time;
u8 vp_erroroffset;
u8 vp_vstepmin;
u8 vp_vstepmax;
u32 vp_vddmin;
u32 vp_vddmax;
u8 vp_timeout_us;
u16 i2c_slave_addr;
u16 volt_reg_addr;
u16 cmd_reg_addr;
bool i2c_high_speed;
u8 i2c_hscll_low;
u8 i2c_hscll_high;
u8 i2c_scll_low;
u8 i2c_scll_high;
u8 i2c_mcode;
unsigned long (*vsel_to_uv) (const u8 vsel);
u8 (*uv_to_vsel) (unsigned long uV);
};
/**
* struct omap_vdd_dep_volt - Map table for voltage dependencies
* @main_vdd_volt : The main vdd voltage
* @dep_vdd_volt : The voltage at which the dependent vdd should be
* when the main vdd is at <main_vdd_volt> voltage
*
* Table containing the parent vdd voltage and the dependent vdd voltage
* corresponding to it.
*/
struct omap_vdd_dep_volt {
u32 main_vdd_volt;
u32 dep_vdd_volt;
};
/**
* struct omap_vdd_dep_info - Dependent vdd info
* @name : Dependent vdd name
* @_dep_voltdm : internal structure meant to prevent multiple lookups
* @dep_table : Table containing the dependent vdd voltage
* corresponding to every main vdd voltage.
* @nr_dep_entries : number of dependency voltage entries
*/
struct omap_vdd_dep_info {
char *name;
struct voltagedomain *_dep_voltdm;
struct omap_vdd_dep_volt *dep_table;
int nr_dep_entries;
};
/**
* omap_vdd_info - Per Voltage Domain info
*
* @volt_data : voltage table having the distinct voltages supported
* by the domain and other associated per voltage data.
* @dep_vdd_info : Array ending with a 0 terminator for dependency
* voltage information.
*/
struct omap_vdd_info {
struct omap_volt_data *volt_data;
struct omap_vdd_dep_info *dep_vdd_info;
};
void omap_voltage_get_volttable(struct voltagedomain *voltdm,
struct omap_volt_data **volt_data);
struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm,
unsigned long volt);
unsigned long omap_voltage_get_nom_volt(struct voltagedomain *voltdm);
#ifdef CONFIG_PM
int omap_voltage_register_pmic(struct voltagedomain *voltdm,
struct omap_voltdm_pmic *pmic);
void omap_change_voltscale_method(struct voltagedomain *voltdm,
int voltscale_method);
int omap_voltage_late_init(void);
#else
static inline int omap_voltage_register_pmic(struct voltagedomain *voltdm,
struct omap_voltdm_pmic *pmic)
{
return -EINVAL;
}
static inline void omap_change_voltscale_method(struct voltagedomain *voltdm,
int voltscale_method) {}
static inline int omap_voltage_late_init(void)
{
return -EINVAL;
}
#endif
extern void omap2xxx_voltagedomains_init(void);
extern void omap3xxx_voltagedomains_init(void);
extern void omap44xx_voltagedomains_init(void);
struct voltagedomain *voltdm_lookup(const char *name);
void voltdm_init(struct voltagedomain **voltdm_list);
int voltdm_add_pwrdm(struct voltagedomain *voltdm, struct powerdomain *pwrdm);
int voltdm_for_each(int (*fn)(struct voltagedomain *voltdm, void *user),
void *user);
int voltdm_for_each_pwrdm(struct voltagedomain *voltdm,
int (*fn)(struct voltagedomain *voltdm,
struct powerdomain *pwrdm));
int voltdm_scale(struct voltagedomain *voltdm, unsigned long target_volt);
void voltdm_reset(struct voltagedomain *voltdm);
#endif
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