2010-05-29 18:32:21 +02:00
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/*
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* OMAP Voltage Management Routines
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*
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* Author: Thara Gopinath <thara@ti.com>
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*
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* Copyright (C) 2009 Texas Instruments, Inc.
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* Thara Gopinath <thara@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ARCH_ARM_MACH_OMAP2_VOLTAGE_H
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#define __ARCH_ARM_MACH_OMAP2_VOLTAGE_H
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2011-01-05 11:57:04 +01:00
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#include <linux/err.h>
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2011-03-11 06:17:45 +01:00
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#include "vc.h"
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#include "vp.h"
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2011-03-17 00:13:15 +01:00
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struct powerdomain;
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2011-03-11 06:17:45 +01:00
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/* XXX document */
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2010-05-29 18:32:21 +02:00
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#define VOLTSCALE_VPFORCEUPDATE 1
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#define VOLTSCALE_VCBYPASS 2
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/*
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* OMAP3 GENERIC setup times. Revisit to see if these needs to be
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* passed from board or PMIC file
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*/
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#define OMAP3_CLKSETUP 0xff
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#define OMAP3_VOLTOFFSET 0xff
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#define OMAP3_VOLTSETUP2 0xff
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2011-03-16 22:25:45 +01:00
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struct omap_vdd_info;
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2011-03-11 06:17:45 +01:00
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/**
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* struct omap_vfsm_instance_data - per-voltage manager FSM register/bitfield
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* data
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* @voltsetup_mask: SETUP_TIME* bitmask in the PRM_VOLTSETUP* register
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* @voltsetup_reg: register offset of PRM_VOLTSETUP from PRM base
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* @voltsetup_shift: SETUP_TIME* field shift in the PRM_VOLTSETUP* register
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*
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* XXX What about VOLTOFFSET/VOLTCTRL?
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* XXX It is not necessary to have both a _mask and a _shift for the same
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* bitfield - remove one!
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*/
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struct omap_vfsm_instance_data {
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u32 voltsetup_mask;
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u8 voltsetup_reg;
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u8 voltsetup_shift;
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};
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2010-12-10 18:45:23 +01:00
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2010-05-29 18:32:21 +02:00
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/**
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* struct voltagedomain - omap voltage domain global structure.
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2011-03-16 22:25:45 +01:00
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* @name: Name of the voltage domain which can be used as a unique identifier.
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2011-03-24 01:00:21 +01:00
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* @scalable: Whether or not this voltage domain is scalable
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2011-03-16 22:25:45 +01:00
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* @node: list_head linking all voltage domains
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2011-03-17 00:13:15 +01:00
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* @pwrdm_list: list_head linking all powerdomains in this voltagedomain
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2011-03-23 00:14:57 +01:00
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* @vc: pointer to VC channel associated with this voltagedomain
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2011-03-28 19:40:15 +02:00
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* @read: read a VC/VP register
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* @write: write a VC/VP register
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* @read: read-modify-write a VC/VP register
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2011-03-16 22:25:45 +01:00
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* @vdd: to be removed
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2010-05-29 18:32:21 +02:00
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*/
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struct voltagedomain {
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char *name;
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2011-03-24 01:00:21 +01:00
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bool scalable;
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2011-03-16 22:25:45 +01:00
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struct list_head node;
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2011-03-17 00:13:15 +01:00
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struct list_head pwrdm_list;
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2011-03-23 00:14:57 +01:00
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struct omap_vc_channel *vc;
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2011-03-28 19:40:15 +02:00
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/* VC/VP register access functions: SoC specific */
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u32 (*read) (u8 offset);
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void (*write) (u32 val, u8 offset);
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u32 (*rmw)(u32 mask, u32 bits, u8 offset);
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2011-03-16 22:25:45 +01:00
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struct omap_vdd_info *vdd;
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2010-05-29 18:32:21 +02:00
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};
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/**
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* struct omap_volt_data - Omap voltage specific data.
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* @voltage_nominal: The possible voltage value in uV
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* @sr_efuse_offs: The offset of the efuse register(from system
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* control module base address) from where to read
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* the n-target value for the smartreflex module.
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* @sr_errminlimit: Error min limit value for smartreflex. This value
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* differs at differnet opp and thus is linked
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* with voltage.
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* @vp_errorgain: Error gain value for the voltage processor. This
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* field also differs according to the voltage/opp.
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*/
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struct omap_volt_data {
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u32 volt_nominal;
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u32 sr_efuse_offs;
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u8 sr_errminlimit;
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u8 vp_errgain;
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};
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/**
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* struct omap_volt_pmic_info - PMIC specific data required by voltage driver.
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* @slew_rate: PMIC slew rate (in uv/us)
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* @step_size: PMIC voltage step size (in uv)
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* @vsel_to_uv: PMIC API to convert vsel value to actual voltage in uV.
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* @uv_to_vsel: PMIC API to convert voltage in uV to vsel value.
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2011-03-22 22:12:37 +01:00
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* @volt_reg_addr: voltage configuration register address
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* @cmd_reg_addr: command (on, on-LP, ret, off) configuration register address
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2010-05-29 18:32:21 +02:00
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*/
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struct omap_volt_pmic_info {
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int slew_rate;
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int step_size;
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u32 on_volt;
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u32 onlp_volt;
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u32 ret_volt;
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u32 off_volt;
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u16 volt_setup_time;
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u8 vp_erroroffset;
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u8 vp_vstepmin;
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u8 vp_vstepmax;
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u8 vp_vddmin;
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u8 vp_vddmax;
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u8 vp_timeout_us;
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u8 i2c_slave_addr;
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2011-03-22 22:12:37 +01:00
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u8 volt_reg_addr;
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u8 cmd_reg_addr;
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2010-05-29 18:32:21 +02:00
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unsigned long (*vsel_to_uv) (const u8 vsel);
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u8 (*uv_to_vsel) (unsigned long uV);
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};
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2011-03-11 06:17:45 +01:00
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/**
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* omap_vdd_info - Per Voltage Domain info
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*
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* @volt_data : voltage table having the distinct voltages supported
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* by the domain and other associated per voltage data.
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* @pmic_info : pmic specific parameters which should be populted by
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* the pmic drivers.
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* @vp_data : the register values, shifts, masks for various
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* vp registers
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* @vp_rt_data : VP data derived at runtime, not predefined
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* @vfsm : voltage manager FSM data
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* @debug_dir : debug directory for this voltage domain.
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* @curr_volt : current voltage for this vdd.
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* @vp_enabled : flag to keep track of whether vp is enabled or not
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* @volt_scale : API to scale the voltage of the vdd.
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*/
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struct omap_vdd_info {
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struct omap_volt_data *volt_data;
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struct omap_volt_pmic_info *pmic_info;
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struct omap_vp_instance_data *vp_data;
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struct omap_vp_runtime_data vp_rt_data;
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const struct omap_vfsm_instance_data *vfsm;
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struct dentry *debug_dir;
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u32 curr_volt;
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bool vp_enabled;
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2011-03-16 21:35:22 +01:00
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2011-03-16 22:25:45 +01:00
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int (*volt_scale) (struct voltagedomain *voltdm,
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2011-03-11 06:17:45 +01:00
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unsigned long target_volt);
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};
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2010-05-29 18:32:21 +02:00
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int omap_voltage_scale_vdd(struct voltagedomain *voltdm,
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unsigned long target_volt);
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void omap_voltage_reset(struct voltagedomain *voltdm);
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void omap_voltage_get_volttable(struct voltagedomain *voltdm,
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struct omap_volt_data **volt_data);
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struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm,
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unsigned long volt);
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unsigned long omap_voltage_get_nom_volt(struct voltagedomain *voltdm);
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struct dentry *omap_voltage_get_dbgdir(struct voltagedomain *voltdm);
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#ifdef CONFIG_PM
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int omap_voltage_register_pmic(struct voltagedomain *voltdm,
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struct omap_volt_pmic_info *pmic_info);
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void omap_change_voltscale_method(struct voltagedomain *voltdm,
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int voltscale_method);
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int omap_voltage_late_init(void);
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#else
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static inline int omap_voltage_register_pmic(struct voltagedomain *voltdm,
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2011-01-05 11:57:02 +01:00
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struct omap_volt_pmic_info *pmic_info)
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{
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return -EINVAL;
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}
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2010-05-29 18:32:21 +02:00
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static inline void omap_change_voltscale_method(struct voltagedomain *voltdm,
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int voltscale_method) {}
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static inline int omap_voltage_late_init(void)
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{
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return -EINVAL;
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}
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#endif
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2011-03-24 00:09:41 +01:00
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extern void omap2xxx_voltagedomains_init(void);
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2011-03-16 22:25:45 +01:00
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extern void omap3xxx_voltagedomains_init(void);
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extern void omap44xx_voltagedomains_init(void);
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struct voltagedomain *voltdm_lookup(const char *name);
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void voltdm_init(struct voltagedomain **voltdm_list);
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2011-03-16 23:52:47 +01:00
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int voltdm_add_pwrdm(struct voltagedomain *voltdm, struct powerdomain *pwrdm);
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2011-03-17 00:13:15 +01:00
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int voltdm_for_each(int (*fn)(struct voltagedomain *voltdm, void *user),
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void *user);
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int voltdm_for_each_pwrdm(struct voltagedomain *voltdm,
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int (*fn)(struct voltagedomain *voltdm,
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struct powerdomain *pwrdm));
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2010-05-29 18:32:21 +02:00
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#endif
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