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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 200
#define VP_TRANXDONE_TIMEOUT 300
/**
* struct omap_vp_common_data - register data common to all VDDs
* @vpconfig_errorgain_mask: ERRORGAIN bitmask in the PRM_VP*_CONFIG reg
* @vpconfig_initvoltage_mask: INITVOLTAGE bitmask in the PRM_VP*_CONFIG reg
* @vpconfig_timeouten_mask: 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
* @vpconfig_stepmin_shift: VSTEPMIN field shift in the PRM_VP*_VSTEPMIN reg
* @vpconfig_smpswaittimemin_shift: SMPSWAITTIMEMIN field shift in PRM_VP*_VSTEPMIN reg
* @vpconfig_stepmax_shift: VSTEPMAX field shift in the PRM_VP*_VSTEPMAX reg
* @vpconfig_smpswaittimemax_shift: SMPSWAITTIMEMAX field shift in PRM_VP*_VSTEPMAX reg
* @vpconfig_vlimitto_vddmin_shift: VDDMIN field shift in PRM_VP*_VLIMITTO reg
* @vpconfig_vlimitto_vddmax_shift: VDDMAX field shift in PRM_VP*_VLIMITTO reg
* @vpconfig_vlimitto_timeout_shift: TIMEOUT field shift in PRM_VP*_VLIMITTO reg
* @prm_mod: PRM module id used for PRM register access
*
* XXX It it not necessary to have both a mask and a shift for the same
* bitfield - remove one
* XXX Many of these fields are wrongly named -- e.g., vpconfig_smps* -- fix!
*/
struct omap_vp_common_data {
u32 vpconfig_errorgain_mask;
u32 vpconfig_initvoltage_mask;
u32 vpconfig_timeouten;
u32 vpconfig_initvdd;
u32 vpconfig_forceupdate;
u32 vpconfig_vpenable;
s16 prm_mod;
u8 vpconfig_erroroffset_shift;
u8 vpconfig_errorgain_shift;
u8 vpconfig_initvoltage_shift;
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;
};
/**
* struct omap_vp_prm_irqst_data - PRM_IRQSTATUS_MPU.VP_TRANXDONE_ST data
* @tranxdone_status: VP_TRANXDONE_ST bitmask in PRM_IRQSTATUS_MPU reg
*
* XXX Note that on OMAP3, VP_TRANXDONE interrupt may not work due to a
* hardware bug
* XXX This structure is probably not needed
*/
struct omap_vp_prm_irqst_data {
u32 tranxdone_status;
};
/**
* struct omap_vp_instance_data - VP register offsets (per-VDD)
* @vp_common: pointer to struct omap_vp_common_data * for this SoC
* @prm_irqst_data: pointer to struct omap_vp_prm_irqst_data for this VDD
* @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
*
* XXX vp_common is probably not needed since it is per-SoC
*/
struct omap_vp_instance_data {
const struct omap_vp_common_data *vp_common;
const struct omap_vp_prm_irqst_data *prm_irqst_data;
u8 vpconfig;
u8 vstepmin;
u8 vstepmax;
u8 vlimitto;
u8 vstatus;
u8 voltage;
};
/**
* struct omap_vp_runtime_data - VP data populated at runtime by code
* @vpconfig_erroroffset: value of ERROROFFSET bitfield in PRM_VP*_CONFIG
* @vpconfig_errorgain: value of ERRORGAIN bitfield in PRM_VP*_CONFIG
* @vstepmin_smpswaittimemin: value of SMPSWAITTIMEMIN bitfield in PRM_VP*_VSTEPMIN
* @vstepmax_smpswaittimemax: value of SMPSWAITTIMEMAX bitfield in PRM_VP*_VSTEPMAX
* @vlimitto_timeout: value of TIMEOUT bitfield in PRM_VP*_VLIMITTO
* @vstepmin_stepmin: value of VSTEPMIN bitfield in PRM_VP*_VSTEPMIN
* @vstepmax_stepmax: value of VSTEPMAX bitfield in PRM_VP*_VSTEPMAX
* @vlimitto_vddmin: value of VDDMIN bitfield in PRM_VP*_VLIMITTO
* @vlimitto_vddmax: value of VDDMAX bitfield in PRM_VP*_VLIMITTO
*
* XXX Is this structure really needed? Why not just program the
* device directly? They are in PRM space, therefore in the WKUP
* powerdomain, so register contents should not be lost in off-mode.
* XXX Some of these fields are incorrectly named, e.g., vstep*
*/
struct omap_vp_runtime_data {
u32 vpconfig_erroroffset;
u16 vpconfig_errorgain;
u16 vstepmin_smpswaittimemin;
u16 vstepmax_smpswaittimemax;
u16 vlimitto_timeout;
u8 vstepmin_stepmin;
u8 vstepmax_stepmax;
u8 vlimitto_vddmin;
u8 vlimitto_vddmax;
};
extern struct omap_vp_instance_data omap3_vp1_data;
extern struct omap_vp_instance_data omap3_vp2_data;
extern struct omap_vp_instance_data omap4_vp_mpu_data;
extern struct omap_vp_instance_data omap4_vp_iva_data;
extern struct omap_vp_instance_data omap4_vp_core_data;
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,
unsigned long target_volt);
#endif
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