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/*
* OMAP3/4 Voltage Processor (VP) structure and macro definitions
*
* Copyright (C) 2007, 2010 Texas Instruments, Inc.
* Rajendra Nayak <rnayak@ti.com>
* Lesly A M <x0080970@ti.com>
* Thara Gopinath <thara@ti.com>
*
* Copyright (C) 2008, 2011 Nokia Corporation
* Kalle Jokiniemi
* Paul Walmsley
*
* 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_VP_H
#define __ARCH_ARM_MACH_OMAP2_VP_H
#include <linux/kernel.h>
struct voltagedomain;
/* XXX document */
#define VP_IDLE_TIMEOUT 500
#define VP_TRANXDONE_TIMEOUT 300
/**
* struct omap_vp_ops - per-VP operations
* @check_txdone: check for VP transaction done
* @clear_txdone: clear VP transaction done status
*/
struct omap_vp_ops {
u32 (*check_txdone)(u8 vp_id);
void (*clear_txdone)(u8 vp_id);
void (*recover)(u8 vp_id);
};
/**
* struct omap_vp_common - register data common to all VDDs
* @vpconfig_erroroffset_mask: ERROROFFSET bitmask in the PRM_VP*_CONFIG reg
* @vpconfig_errorgain_mask: ERRORGAIN bitmask in the PRM_VP*_CONFIG reg
* @vpconfig_initvoltage_mask: INITVOLTAGE bitmask in the PRM_VP*_CONFIG reg
* @vpconfig_timeouten: TIMEOUT bitmask in the PRM_VP*_CONFIG reg
* @vpconfig_initvdd: INITVDD bitmask in the PRM_VP*_CONFIG reg
* @vpconfig_forceupdate: FORCEUPDATE bitmask in the PRM_VP*_CONFIG reg
* @vpconfig_vpenable: VPENABLE bitmask in the PRM_VP*_CONFIG reg
* @vpconfig_erroroffset_shift: ERROROFFSET field shift in PRM_VP*_CONFIG reg
* @vpconfig_errorgain_shift: ERRORGAIN field shift in PRM_VP*_CONFIG reg
* @vpconfig_initvoltage_shift: INITVOLTAGE field shift in PRM_VP*_CONFIG reg
* @vstepmin_stepmin_shift: VSTEPMIN field shift in the PRM_VP*_VSTEPMIN reg
* @vstepmin_smpswaittimemin_shift: SMPSWAITTIMEMIN field shift in PRM_VP*_VSTEPMIN reg
* @vstepmax_stepmax_shift: VSTEPMAX field shift in the PRM_VP*_VSTEPMAX reg
* @vstepmax_smpswaittimemax_shift: SMPSWAITTIMEMAX field shift in PRM_VP*_VSTEPMAX reg
* @vlimitto_vddmin_shift: VDDMIN field shift in PRM_VP*_VLIMITTO reg
* @vlimitto_vddmax_shift: VDDMAX field shift in PRM_VP*_VLIMITTO reg
* @vlimitto_timeout_shift: TIMEOUT field shift in PRM_VP*_VLIMITTO reg
* @vpvoltage_mask: VPVOLTAGE field mask in PRM_VP*_VOLTAGE reg
*/
struct omap_vp_common {
u32 vpconfig_erroroffset_mask;
u32 vpconfig_errorgain_mask;
u32 vpconfig_initvoltage_mask;
u8 vpconfig_timeouten;
u8 vpconfig_initvdd;
u8 vpconfig_forceupdate;
u8 vpconfig_vpenable;
u8 vstatus_vpidle;
u8 vstepmin_stepmin_shift;
u8 vstepmin_smpswaittimemin_shift;
u8 vstepmax_stepmax_shift;
u8 vstepmax_smpswaittimemax_shift;
u8 vlimitto_vddmin_shift;
u8 vlimitto_vddmax_shift;
u8 vlimitto_timeout_shift;
u8 vpvoltage_mask;
const struct omap_vp_ops *ops;
};
/**
* struct omap_vp_volt_limits - Voltage limit Parameters for SoC
* @vddmin: Minimum voltage in uV
* @vddmax: Maximum voltage in uV
*/
struct omap_vp_volt_limits {
u32 vddmin;
u32 vddmax;
};
/**
* struct omap_vp_instance - VP register offsets (per-VDD)
* @common: pointer to struct omap_vp_common * for this SoC
* @vpconfig: PRM_VP*_CONFIG reg offset from PRM start
* @vstepmin: PRM_VP*_VSTEPMIN reg offset from PRM start
* @vlimitto: PRM_VP*_VLIMITTO reg offset from PRM start
* @vstatus: PRM_VP*_VSTATUS reg offset from PRM start
* @voltage: PRM_VP*_VOLTAGE reg offset from PRM start
* @enabled: flag to keep track of whether vp is enabled or not
* @limits: limits to set based off SoC VP capability.
*
* XXX vp_common is probably not needed since it is per-SoC
*/
struct omap_vp_instance {
const struct omap_vp_common *common;
u8 vpconfig;
u8 vstepmin;
u8 vstepmax;
u8 vlimitto;
u8 vstatus;
u8 voltage;
u8 id;
bool enabled;
struct omap_vp_volt_limits *vlimits;
};
extern struct omap_vp_instance omap3_vp_mpu;
extern struct omap_vp_instance omap3_vp_core;
extern struct omap_vp_instance omap4_vp_mpu;
extern struct omap_vp_instance omap4_vp_iva;
extern struct omap_vp_instance omap4_vp_core;
void omap_vp_init(struct voltagedomain *voltdm);
void omap_vp_enable(struct voltagedomain *voltdm);
void omap_vp_disable(struct voltagedomain *voltdm);
unsigned long omap_vp_get_curr_volt(struct voltagedomain *voltdm);
int omap_vp_forceupdate_scale(struct voltagedomain *voltdm,
struct omap_volt_data *target_v);
int omap_vp_update_errorgain(struct voltagedomain *voltdm,
struct omap_volt_data *volt_data);
bool omap_vp_is_transdone(struct voltagedomain *voltdm);
void omap_vp_clear_transdone(struct voltagedomain *voltdm);
#endif
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