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/*
* Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
/*!
* @file arch-mxc/dvfs.h
*
* @brief MXC dvfs header file.
*
* @ingroup PM_MX31 PM_MXC91321 PM_MXC91311
*/
#ifndef __ASM_ARCH_MXC_DVFS_H__
#define __ASM_ARCH_MXC_DVFS_H__
#include "dvfs_dptc_struct.h"
/*!
* If value equal to FSVAI bits indicates working point decrease
*/
#define DVFS_DECREASE (unsigned long)0x2
/*!
* If value equal to FSVAI bits indicates working point increase
*/
#define DVFS_INCREASE (unsigned long)0x1
/*!
* If value equal to FSVAI bits indicates working point increase to maximum
*/
#define DVFS_EMERG (unsigned long)0x3
/*!
* This function is called for module initialization.
* It initializes the driver data structures and sets up the DVFS hardware.
*
* @param params pointer to the DVFS & DPTC driver parameters structure.
*
* @return 0 to indicate success else returns a negative number.
*
*/
int __init init_dvfs_controller(dvfs_dptc_params_s * params);
/*!
* This function enables the DVFS module. this function updates the DVFS
* thresholds, updates the PMIC, unmasks the DVFS interrupt and enables
* the DVFS module
*
* @param params pointer to the DVFS & DPTC driver parameters structure.
*
* @return 0 if DVFS module was enabled else returns -EINVAL.
*/
int start_dvfs(dvfs_dptc_params_s * params);
/*!
* This function disables the DVFS module.
*
* @param params pointer to the DVFS & DPTC driver parameters structure.
*
* @return 0 if DVFS module was enabled else returns -EINVAL.
*/
int stop_dvfs(dvfs_dptc_params_s * params);
/*!
* This function turns on/off SW general purpose bits.
* The argument's 4 LSBs represent the status of the bits.
*
* @param arg status of the SW general purpose bits
*
* @return 0 on success
*/
int set_sw_gp(unsigned char arg);
/*!
* This function sets DVFS to monitor WFI signal
*
* @param arg 0 - turn WFI off, 1 - turn WFI on
* @return 0 on success, error code on fail
*/
int set_wfi(unsigned char arg);
#ifndef CONFIG_MXC_DVFS_SDMA
/*!
* This function is the DVFS Interrupt handler.
* @param params pointer to the DVFS & DPTC driver parameters structure.
*/
void dvfs_irq(dvfs_dptc_params_s * params);
#endif
/*!
* This function changes the frequency if DVFS HW is disabled.
* It gets id of the required state supported by DVFS table and
* updates CCM.
*
* @param dvfs_state_id id of the DVFS state.
* @return 0 on success, error code on fail
*/
int dvfs_set_state(int dvfs_state_id);
/*
* Update tables of frequencies for DPM usage
*
* @param dvfs_dptc_tables_ptr pointer to the DVFS &
* DPTC translation table.
*/
void dvfs_update_freqs_table(dvfs_dptc_tables_s * dvfs_dptc_tables_ptr);
/*!
* Read the DVSUP bits from the CCM
*/
unsigned long dvfs_get_dvsup(void);
/*!
* This contains the array with values of supported frequencies in Hz.
* The structure is used by DPM.
*/
extern dvfs_states_table *dvfs_states_tbl;
/*!
* This define DVFS log buffer sample size (in bits)
*/
#define DVFS_LB_SAMPLE_SIZE 4
/*!
* This define DVFS log buffer samples
*/
#define DVFS_LB_SIZE 1600
/*!
* This define DVFS SDMA buffer descriptors number
*/
#define DVFS_LB_SDMA_BD 10
/*!
* This defines default DVFS down threshold
*/
#define DVFS_DNTHR 18
/*!
* This defines default DVFS up threshold
*/
#define DVFS_UPTHR 30
/*!
* This defines default DVFS panic threshold
*/
#define DVFS_PNCTHR 63
#endif
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