2010-05-29 18:32:21 +02:00
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/*
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* OMAP3/OMAP4 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) 2007 Texas Instruments, Inc.
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* Rajendra Nayak <rnayak@ti.com>
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* Lesly A M <x0080970@ti.com>
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*
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* Copyright (C) 2008 Nokia Corporation
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* Kalle Jokiniemi
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*
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* Copyright (C) 2010 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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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/debugfs.h>
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#include <linux/slab.h>
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#include <plat/common.h>
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#include <plat/voltage.h>
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#include "prm-regbits-34xx.h"
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2010-12-10 18:45:23 +01:00
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#include "prm-regbits-44xx.h"
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#include "prm44xx.h"
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#include "prcm44xx.h"
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#include "prminst44xx.h"
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2010-05-29 18:32:21 +02:00
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#include "control.h"
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#define VP_IDLE_TIMEOUT 200
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#define VP_TRANXDONE_TIMEOUT 300
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#define VOLTAGE_DIR_SIZE 16
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/* Voltage processor register offsets */
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struct vp_reg_offs {
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u8 vpconfig;
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u8 vstepmin;
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u8 vstepmax;
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u8 vlimitto;
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u8 vstatus;
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u8 voltage;
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};
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/* Voltage Processor bit field values, shifts and masks */
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struct vp_reg_val {
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/* PRM module */
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u16 prm_mod;
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/* VPx_VPCONFIG */
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u32 vpconfig_erroroffset;
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u16 vpconfig_errorgain;
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u32 vpconfig_errorgain_mask;
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u8 vpconfig_errorgain_shift;
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u32 vpconfig_initvoltage_mask;
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u8 vpconfig_initvoltage_shift;
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u32 vpconfig_timeouten;
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u32 vpconfig_initvdd;
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u32 vpconfig_forceupdate;
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u32 vpconfig_vpenable;
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/* VPx_VSTEPMIN */
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u8 vstepmin_stepmin;
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u16 vstepmin_smpswaittimemin;
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u8 vstepmin_stepmin_shift;
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u8 vstepmin_smpswaittimemin_shift;
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/* VPx_VSTEPMAX */
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u8 vstepmax_stepmax;
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u16 vstepmax_smpswaittimemax;
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u8 vstepmax_stepmax_shift;
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u8 vstepmax_smpswaittimemax_shift;
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/* VPx_VLIMITTO */
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u8 vlimitto_vddmin;
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u8 vlimitto_vddmax;
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u16 vlimitto_timeout;
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u8 vlimitto_vddmin_shift;
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u8 vlimitto_vddmax_shift;
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u8 vlimitto_timeout_shift;
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/* PRM_IRQSTATUS*/
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u32 tranxdone_status;
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};
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/* Voltage controller registers and offsets */
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struct vc_reg_info {
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/* PRM module */
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u16 prm_mod;
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/* VC register offsets */
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u8 smps_sa_reg;
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u8 smps_volra_reg;
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u8 bypass_val_reg;
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u8 cmdval_reg;
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u8 voltsetup_reg;
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/*VC_SMPS_SA*/
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u8 smps_sa_shift;
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u32 smps_sa_mask;
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/* VC_SMPS_VOL_RA */
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u8 smps_volra_shift;
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u32 smps_volra_mask;
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/* VC_BYPASS_VAL */
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u8 data_shift;
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u8 slaveaddr_shift;
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u8 regaddr_shift;
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u32 valid;
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/* VC_CMD_VAL */
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u8 cmd_on_shift;
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u8 cmd_onlp_shift;
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u8 cmd_ret_shift;
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u8 cmd_off_shift;
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u32 cmd_on_mask;
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/* PRM_VOLTSETUP */
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u8 voltsetup_shift;
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u32 voltsetup_mask;
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};
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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_offs : structure containing the offsets for various
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* vp registers
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* @vp_reg : the register values, shifts, masks for various
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* vp registers
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* @vc_reg : structure containing various various vc registers,
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* shifts, masks etc.
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* @voltdm : pointer to the voltage domain structure
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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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* @ocp_mod : The prm module for accessing the prm irqstatus reg.
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* @prm_irqst_reg : prm irqstatus register.
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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 vp_reg_offs vp_offs;
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struct vp_reg_val vp_reg;
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struct vc_reg_info vc_reg;
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struct voltagedomain voltdm;
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struct dentry *debug_dir;
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u32 curr_volt;
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u16 ocp_mod;
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u8 prm_irqst_reg;
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bool vp_enabled;
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u32 (*read_reg) (u16 mod, u8 offset);
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void (*write_reg) (u32 val, u16 mod, u8 offset);
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int (*volt_scale) (struct omap_vdd_info *vdd,
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unsigned long target_volt);
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};
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static struct omap_vdd_info *vdd_info;
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/*
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* Number of scalable voltage domains.
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*/
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static int nr_scalable_vdd;
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/* OMAP3 VDD sturctures */
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static struct omap_vdd_info omap3_vdd_info[] = {
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{
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.vp_offs = {
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.vpconfig = OMAP3_PRM_VP1_CONFIG_OFFSET,
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.vstepmin = OMAP3_PRM_VP1_VSTEPMIN_OFFSET,
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.vstepmax = OMAP3_PRM_VP1_VSTEPMAX_OFFSET,
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.vlimitto = OMAP3_PRM_VP1_VLIMITTO_OFFSET,
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.vstatus = OMAP3_PRM_VP1_STATUS_OFFSET,
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.voltage = OMAP3_PRM_VP1_VOLTAGE_OFFSET,
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},
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.voltdm = {
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.name = "mpu",
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},
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},
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{
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.vp_offs = {
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.vpconfig = OMAP3_PRM_VP2_CONFIG_OFFSET,
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.vstepmin = OMAP3_PRM_VP2_VSTEPMIN_OFFSET,
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.vstepmax = OMAP3_PRM_VP2_VSTEPMAX_OFFSET,
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.vlimitto = OMAP3_PRM_VP2_VLIMITTO_OFFSET,
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.vstatus = OMAP3_PRM_VP2_STATUS_OFFSET,
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.voltage = OMAP3_PRM_VP2_VOLTAGE_OFFSET,
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},
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.voltdm = {
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.name = "core",
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},
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},
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};
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#define OMAP3_NR_SCALABLE_VDD ARRAY_SIZE(omap3_vdd_info)
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2010-12-10 18:45:23 +01:00
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/* OMAP4 VDD sturctures */
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static struct omap_vdd_info omap4_vdd_info[] = {
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{
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.vp_offs = {
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.vpconfig = OMAP4_PRM_VP_MPU_CONFIG_OFFSET,
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.vstepmin = OMAP4_PRM_VP_MPU_VSTEPMIN_OFFSET,
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.vstepmax = OMAP4_PRM_VP_MPU_VSTEPMAX_OFFSET,
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.vlimitto = OMAP4_PRM_VP_MPU_VLIMITTO_OFFSET,
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.vstatus = OMAP4_PRM_VP_MPU_STATUS_OFFSET,
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.voltage = OMAP4_PRM_VP_MPU_VOLTAGE_OFFSET,
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},
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.voltdm = {
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.name = "mpu",
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},
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},
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{
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.vp_offs = {
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.vpconfig = OMAP4_PRM_VP_IVA_CONFIG_OFFSET,
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.vstepmin = OMAP4_PRM_VP_IVA_VSTEPMIN_OFFSET,
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.vstepmax = OMAP4_PRM_VP_IVA_VSTEPMAX_OFFSET,
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.vlimitto = OMAP4_PRM_VP_IVA_VLIMITTO_OFFSET,
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.vstatus = OMAP4_PRM_VP_IVA_STATUS_OFFSET,
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.voltage = OMAP4_PRM_VP_IVA_VOLTAGE_OFFSET,
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},
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.voltdm = {
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.name = "iva",
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},
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},
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{
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.vp_offs = {
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.vpconfig = OMAP4_PRM_VP_CORE_CONFIG_OFFSET,
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.vstepmin = OMAP4_PRM_VP_CORE_VSTEPMIN_OFFSET,
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.vstepmax = OMAP4_PRM_VP_CORE_VSTEPMAX_OFFSET,
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.vlimitto = OMAP4_PRM_VP_CORE_VLIMITTO_OFFSET,
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.vstatus = OMAP4_PRM_VP_CORE_STATUS_OFFSET,
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.voltage = OMAP4_PRM_VP_CORE_VOLTAGE_OFFSET,
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},
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.voltdm = {
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.name = "core",
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},
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},
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};
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#define OMAP4_NR_SCALABLE_VDD ARRAY_SIZE(omap4_vdd_info)
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2010-05-29 18:32:21 +02:00
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/*
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* Structures containing OMAP3430/OMAP3630 voltage supported and various
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* voltage dependent data for each VDD.
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*/
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#define VOLT_DATA_DEFINE(_v_nom, _efuse_offs, _errminlimit, _errgain) \
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{ \
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.volt_nominal = _v_nom, \
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.sr_efuse_offs = _efuse_offs, \
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.sr_errminlimit = _errminlimit, \
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.vp_errgain = _errgain \
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}
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/* VDD1 */
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static struct omap_volt_data omap34xx_vddmpu_volt_data[] = {
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VOLT_DATA_DEFINE(OMAP3430_VDD_MPU_OPP1_UV, OMAP343X_CONTROL_FUSE_OPP1_VDD1, 0xf4, 0x0c),
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VOLT_DATA_DEFINE(OMAP3430_VDD_MPU_OPP2_UV, OMAP343X_CONTROL_FUSE_OPP2_VDD1, 0xf4, 0x0c),
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VOLT_DATA_DEFINE(OMAP3430_VDD_MPU_OPP3_UV, OMAP343X_CONTROL_FUSE_OPP3_VDD1, 0xf9, 0x18),
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VOLT_DATA_DEFINE(OMAP3430_VDD_MPU_OPP4_UV, OMAP343X_CONTROL_FUSE_OPP4_VDD1, 0xf9, 0x18),
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VOLT_DATA_DEFINE(OMAP3430_VDD_MPU_OPP5_UV, OMAP343X_CONTROL_FUSE_OPP5_VDD1, 0xf9, 0x18),
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VOLT_DATA_DEFINE(0, 0, 0, 0),
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};
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static struct omap_volt_data omap36xx_vddmpu_volt_data[] = {
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VOLT_DATA_DEFINE(OMAP3630_VDD_MPU_OPP50_UV, OMAP3630_CONTROL_FUSE_OPP50_VDD1, 0xf4, 0x0c),
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VOLT_DATA_DEFINE(OMAP3630_VDD_MPU_OPP100_UV, OMAP3630_CONTROL_FUSE_OPP100_VDD1, 0xf9, 0x16),
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VOLT_DATA_DEFINE(OMAP3630_VDD_MPU_OPP120_UV, OMAP3630_CONTROL_FUSE_OPP120_VDD1, 0xfa, 0x23),
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VOLT_DATA_DEFINE(OMAP3630_VDD_MPU_OPP1G_UV, OMAP3630_CONTROL_FUSE_OPP1G_VDD1, 0xfa, 0x27),
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VOLT_DATA_DEFINE(0, 0, 0, 0),
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};
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/* VDD2 */
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static struct omap_volt_data omap34xx_vddcore_volt_data[] = {
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VOLT_DATA_DEFINE(OMAP3430_VDD_CORE_OPP1_UV, OMAP343X_CONTROL_FUSE_OPP1_VDD2, 0xf4, 0x0c),
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VOLT_DATA_DEFINE(OMAP3430_VDD_CORE_OPP2_UV, OMAP343X_CONTROL_FUSE_OPP2_VDD2, 0xf4, 0x0c),
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VOLT_DATA_DEFINE(OMAP3430_VDD_CORE_OPP3_UV, OMAP343X_CONTROL_FUSE_OPP3_VDD2, 0xf9, 0x18),
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VOLT_DATA_DEFINE(0, 0, 0, 0),
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};
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static struct omap_volt_data omap36xx_vddcore_volt_data[] = {
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VOLT_DATA_DEFINE(OMAP3630_VDD_CORE_OPP50_UV, OMAP3630_CONTROL_FUSE_OPP50_VDD2, 0xf4, 0x0c),
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VOLT_DATA_DEFINE(OMAP3630_VDD_CORE_OPP100_UV, OMAP3630_CONTROL_FUSE_OPP100_VDD2, 0xf9, 0x16),
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VOLT_DATA_DEFINE(0, 0, 0, 0),
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};
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2010-12-10 18:45:23 +01:00
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/*
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* Structures containing OMAP4430 voltage supported and various
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* voltage dependent data for each VDD.
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*/
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static struct omap_volt_data omap44xx_vdd_mpu_volt_data[] = {
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VOLT_DATA_DEFINE(OMAP4430_VDD_MPU_OPP50_UV, OMAP44XX_CONTROL_FUSE_MPU_OPP50, 0xf4, 0x0c),
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VOLT_DATA_DEFINE(OMAP4430_VDD_MPU_OPP100_UV, OMAP44XX_CONTROL_FUSE_MPU_OPP100, 0xf9, 0x16),
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VOLT_DATA_DEFINE(OMAP4430_VDD_MPU_OPPTURBO_UV, OMAP44XX_CONTROL_FUSE_MPU_OPPTURBO, 0xfa, 0x23),
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VOLT_DATA_DEFINE(OMAP4430_VDD_MPU_OPPNITRO_UV, OMAP44XX_CONTROL_FUSE_MPU_OPPNITRO, 0xfa, 0x27),
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VOLT_DATA_DEFINE(0, 0, 0, 0),
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};
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static struct omap_volt_data omap44xx_vdd_iva_volt_data[] = {
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VOLT_DATA_DEFINE(OMAP4430_VDD_IVA_OPP50_UV, OMAP44XX_CONTROL_FUSE_IVA_OPP50, 0xf4, 0x0c),
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VOLT_DATA_DEFINE(OMAP4430_VDD_IVA_OPP100_UV, OMAP44XX_CONTROL_FUSE_IVA_OPP100, 0xf9, 0x16),
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VOLT_DATA_DEFINE(OMAP4430_VDD_IVA_OPPTURBO_UV, OMAP44XX_CONTROL_FUSE_IVA_OPPTURBO, 0xfa, 0x23),
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VOLT_DATA_DEFINE(0, 0, 0, 0),
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};
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static struct omap_volt_data omap44xx_vdd_core_volt_data[] = {
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VOLT_DATA_DEFINE(OMAP4430_VDD_CORE_OPP50_UV, OMAP44XX_CONTROL_FUSE_CORE_OPP50, 0xf4, 0x0c),
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VOLT_DATA_DEFINE(OMAP4430_VDD_CORE_OPP100_UV, OMAP44XX_CONTROL_FUSE_CORE_OPP100, 0xf9, 0x16),
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|
|
VOLT_DATA_DEFINE(0, 0, 0, 0),
|
|
|
|
};
|
|
|
|
|
2010-05-29 18:32:21 +02:00
|
|
|
static struct dentry *voltage_dir;
|
|
|
|
|
|
|
|
/* Init function pointers */
|
|
|
|
static void (*vc_init) (struct omap_vdd_info *vdd);
|
|
|
|
static int (*vdd_data_configure) (struct omap_vdd_info *vdd);
|
|
|
|
|
|
|
|
static u32 omap3_voltage_read_reg(u16 mod, u8 offset)
|
|
|
|
{
|
|
|
|
return omap2_prm_read_mod_reg(mod, offset);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void omap3_voltage_write_reg(u32 val, u16 mod, u8 offset)
|
|
|
|
{
|
|
|
|
omap2_prm_write_mod_reg(val, mod, offset);
|
|
|
|
}
|
|
|
|
|
2010-12-10 18:45:23 +01:00
|
|
|
static u32 omap4_voltage_read_reg(u16 mod, u8 offset)
|
|
|
|
{
|
|
|
|
return omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
|
|
|
|
mod, offset);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void omap4_voltage_write_reg(u32 val, u16 mod, u8 offset)
|
|
|
|
{
|
|
|
|
omap4_prminst_write_inst_reg(val, OMAP4430_PRM_PARTITION, mod, offset);
|
|
|
|
}
|
|
|
|
|
2010-10-27 16:59:37 +02:00
|
|
|
/* Voltage debugfs support */
|
|
|
|
static int vp_volt_debug_get(void *data, u64 *val)
|
|
|
|
{
|
|
|
|
struct omap_vdd_info *vdd = (struct omap_vdd_info *) data;
|
|
|
|
u8 vsel;
|
|
|
|
|
|
|
|
if (!vdd) {
|
|
|
|
pr_warning("Wrong paramater passed\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
vsel = vdd->read_reg(vdd->vp_reg.prm_mod, vdd->vp_offs.voltage);
|
|
|
|
pr_notice("curr_vsel = %x\n", vsel);
|
|
|
|
|
|
|
|
if (!vdd->pmic_info->vsel_to_uv) {
|
|
|
|
pr_warning("PMIC function to convert vsel to voltage"
|
|
|
|
"in uV not registerd\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
*val = vdd->pmic_info->vsel_to_uv(vsel);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int nom_volt_debug_get(void *data, u64 *val)
|
|
|
|
{
|
|
|
|
struct omap_vdd_info *vdd = (struct omap_vdd_info *) data;
|
|
|
|
|
|
|
|
if (!vdd) {
|
|
|
|
pr_warning("Wrong paramater passed\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
*val = omap_voltage_get_nom_volt(&vdd->voltdm);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
DEFINE_SIMPLE_ATTRIBUTE(vp_volt_debug_fops, vp_volt_debug_get, NULL, "%llu\n");
|
|
|
|
DEFINE_SIMPLE_ATTRIBUTE(nom_volt_debug_fops, nom_volt_debug_get, NULL,
|
|
|
|
"%llu\n");
|
2010-05-29 18:32:21 +02:00
|
|
|
static void vp_latch_vsel(struct omap_vdd_info *vdd)
|
|
|
|
{
|
|
|
|
u32 vpconfig;
|
|
|
|
u16 mod;
|
|
|
|
unsigned long uvdc;
|
|
|
|
char vsel;
|
|
|
|
|
|
|
|
uvdc = omap_voltage_get_nom_volt(&vdd->voltdm);
|
|
|
|
if (!uvdc) {
|
|
|
|
pr_warning("%s: unable to find current voltage for vdd_%s\n",
|
|
|
|
__func__, vdd->voltdm.name);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!vdd->pmic_info || !vdd->pmic_info->uv_to_vsel) {
|
|
|
|
pr_warning("%s: PMIC function to convert voltage in uV to"
|
|
|
|
" vsel not registered\n", __func__);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
mod = vdd->vp_reg.prm_mod;
|
|
|
|
|
|
|
|
vsel = vdd->pmic_info->uv_to_vsel(uvdc);
|
|
|
|
|
|
|
|
vpconfig = vdd->read_reg(mod, vdd->vp_offs.vpconfig);
|
|
|
|
vpconfig &= ~(vdd->vp_reg.vpconfig_initvoltage_mask |
|
|
|
|
vdd->vp_reg.vpconfig_initvdd);
|
|
|
|
vpconfig |= vsel << vdd->vp_reg.vpconfig_initvoltage_shift;
|
|
|
|
|
|
|
|
vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
|
|
|
|
|
|
|
|
/* Trigger initVDD value copy to voltage processor */
|
|
|
|
vdd->write_reg((vpconfig | vdd->vp_reg.vpconfig_initvdd), mod,
|
|
|
|
vdd->vp_offs.vpconfig);
|
|
|
|
|
|
|
|
/* Clear initVDD copy trigger bit */
|
|
|
|
vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Generic voltage init functions */
|
|
|
|
static void __init vp_init(struct omap_vdd_info *vdd)
|
|
|
|
{
|
|
|
|
u32 vp_val;
|
|
|
|
u16 mod;
|
|
|
|
|
|
|
|
if (!vdd->read_reg || !vdd->write_reg) {
|
|
|
|
pr_err("%s: No read/write API for accessing vdd_%s regs\n",
|
|
|
|
__func__, vdd->voltdm.name);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
mod = vdd->vp_reg.prm_mod;
|
|
|
|
|
|
|
|
vp_val = vdd->vp_reg.vpconfig_erroroffset |
|
|
|
|
(vdd->vp_reg.vpconfig_errorgain <<
|
|
|
|
vdd->vp_reg.vpconfig_errorgain_shift) |
|
|
|
|
vdd->vp_reg.vpconfig_timeouten;
|
|
|
|
vdd->write_reg(vp_val, mod, vdd->vp_offs.vpconfig);
|
|
|
|
|
|
|
|
vp_val = ((vdd->vp_reg.vstepmin_smpswaittimemin <<
|
|
|
|
vdd->vp_reg.vstepmin_smpswaittimemin_shift) |
|
|
|
|
(vdd->vp_reg.vstepmin_stepmin <<
|
|
|
|
vdd->vp_reg.vstepmin_stepmin_shift));
|
|
|
|
vdd->write_reg(vp_val, mod, vdd->vp_offs.vstepmin);
|
|
|
|
|
|
|
|
vp_val = ((vdd->vp_reg.vstepmax_smpswaittimemax <<
|
|
|
|
vdd->vp_reg.vstepmax_smpswaittimemax_shift) |
|
|
|
|
(vdd->vp_reg.vstepmax_stepmax <<
|
|
|
|
vdd->vp_reg.vstepmax_stepmax_shift));
|
|
|
|
vdd->write_reg(vp_val, mod, vdd->vp_offs.vstepmax);
|
|
|
|
|
|
|
|
vp_val = ((vdd->vp_reg.vlimitto_vddmax <<
|
|
|
|
vdd->vp_reg.vlimitto_vddmax_shift) |
|
|
|
|
(vdd->vp_reg.vlimitto_vddmin <<
|
|
|
|
vdd->vp_reg.vlimitto_vddmin_shift) |
|
|
|
|
(vdd->vp_reg.vlimitto_timeout <<
|
|
|
|
vdd->vp_reg.vlimitto_timeout_shift));
|
|
|
|
vdd->write_reg(vp_val, mod, vdd->vp_offs.vlimitto);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __init vdd_debugfs_init(struct omap_vdd_info *vdd)
|
|
|
|
{
|
|
|
|
char *name;
|
|
|
|
|
|
|
|
name = kzalloc(VOLTAGE_DIR_SIZE, GFP_KERNEL);
|
|
|
|
if (!name) {
|
|
|
|
pr_warning("%s: Unable to allocate memory for debugfs"
|
|
|
|
" directory name for vdd_%s",
|
|
|
|
__func__, vdd->voltdm.name);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
strcpy(name, "vdd_");
|
|
|
|
strcat(name, vdd->voltdm.name);
|
|
|
|
|
|
|
|
vdd->debug_dir = debugfs_create_dir(name, voltage_dir);
|
|
|
|
if (IS_ERR(vdd->debug_dir)) {
|
|
|
|
pr_warning("%s: Unable to create debugfs directory for"
|
|
|
|
" vdd_%s\n", __func__, vdd->voltdm.name);
|
|
|
|
vdd->debug_dir = NULL;
|
2010-10-27 16:59:37 +02:00
|
|
|
return;
|
2010-05-29 18:32:21 +02:00
|
|
|
}
|
2010-10-27 16:59:37 +02:00
|
|
|
|
|
|
|
(void) debugfs_create_x16("vp_errorgain", S_IRUGO, vdd->debug_dir,
|
|
|
|
&(vdd->vp_reg.vpconfig_errorgain));
|
|
|
|
(void) debugfs_create_x16("vp_smpswaittimemin", S_IRUGO,
|
|
|
|
vdd->debug_dir,
|
|
|
|
&(vdd->vp_reg.vstepmin_smpswaittimemin));
|
|
|
|
(void) debugfs_create_x8("vp_stepmin", S_IRUGO, vdd->debug_dir,
|
|
|
|
&(vdd->vp_reg.vstepmin_stepmin));
|
|
|
|
(void) debugfs_create_x16("vp_smpswaittimemax", S_IRUGO,
|
|
|
|
vdd->debug_dir,
|
|
|
|
&(vdd->vp_reg.vstepmax_smpswaittimemax));
|
|
|
|
(void) debugfs_create_x8("vp_stepmax", S_IRUGO, vdd->debug_dir,
|
|
|
|
&(vdd->vp_reg.vstepmax_stepmax));
|
|
|
|
(void) debugfs_create_x8("vp_vddmax", S_IRUGO, vdd->debug_dir,
|
|
|
|
&(vdd->vp_reg.vlimitto_vddmax));
|
|
|
|
(void) debugfs_create_x8("vp_vddmin", S_IRUGO, vdd->debug_dir,
|
|
|
|
&(vdd->vp_reg.vlimitto_vddmin));
|
|
|
|
(void) debugfs_create_x16("vp_timeout", S_IRUGO, vdd->debug_dir,
|
|
|
|
&(vdd->vp_reg.vlimitto_timeout));
|
|
|
|
(void) debugfs_create_file("curr_vp_volt", S_IRUGO, vdd->debug_dir,
|
|
|
|
(void *) vdd, &vp_volt_debug_fops);
|
|
|
|
(void) debugfs_create_file("curr_nominal_volt", S_IRUGO,
|
|
|
|
vdd->debug_dir, (void *) vdd,
|
|
|
|
&nom_volt_debug_fops);
|
2010-05-29 18:32:21 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Voltage scale and accessory APIs */
|
|
|
|
static int _pre_volt_scale(struct omap_vdd_info *vdd,
|
|
|
|
unsigned long target_volt, u8 *target_vsel, u8 *current_vsel)
|
|
|
|
{
|
|
|
|
struct omap_volt_data *volt_data;
|
|
|
|
u32 vc_cmdval, vp_errgain_val;
|
|
|
|
u16 vp_mod, vc_mod;
|
|
|
|
|
|
|
|
/* Check if suffiecient pmic info is available for this vdd */
|
|
|
|
if (!vdd->pmic_info) {
|
|
|
|
pr_err("%s: Insufficient pmic info to scale the vdd_%s\n",
|
|
|
|
__func__, vdd->voltdm.name);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!vdd->pmic_info->uv_to_vsel) {
|
|
|
|
pr_err("%s: PMIC function to convert voltage in uV to"
|
|
|
|
"vsel not registered. Hence unable to scale voltage"
|
|
|
|
"for vdd_%s\n", __func__, vdd->voltdm.name);
|
|
|
|
return -ENODATA;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!vdd->read_reg || !vdd->write_reg) {
|
|
|
|
pr_err("%s: No read/write API for accessing vdd_%s regs\n",
|
|
|
|
__func__, vdd->voltdm.name);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
vp_mod = vdd->vp_reg.prm_mod;
|
|
|
|
vc_mod = vdd->vc_reg.prm_mod;
|
|
|
|
|
|
|
|
/* Get volt_data corresponding to target_volt */
|
|
|
|
volt_data = omap_voltage_get_voltdata(&vdd->voltdm, target_volt);
|
|
|
|
if (IS_ERR(volt_data))
|
|
|
|
volt_data = NULL;
|
|
|
|
|
|
|
|
*target_vsel = vdd->pmic_info->uv_to_vsel(target_volt);
|
|
|
|
*current_vsel = vdd->read_reg(vp_mod, vdd->vp_offs.voltage);
|
|
|
|
|
|
|
|
/* Setting the ON voltage to the new target voltage */
|
|
|
|
vc_cmdval = vdd->read_reg(vc_mod, vdd->vc_reg.cmdval_reg);
|
|
|
|
vc_cmdval &= ~vdd->vc_reg.cmd_on_mask;
|
|
|
|
vc_cmdval |= (*target_vsel << vdd->vc_reg.cmd_on_shift);
|
|
|
|
vdd->write_reg(vc_cmdval, vc_mod, vdd->vc_reg.cmdval_reg);
|
|
|
|
|
|
|
|
/* Setting vp errorgain based on the voltage */
|
|
|
|
if (volt_data) {
|
|
|
|
vp_errgain_val = vdd->read_reg(vp_mod,
|
|
|
|
vdd->vp_offs.vpconfig);
|
|
|
|
vdd->vp_reg.vpconfig_errorgain = volt_data->vp_errgain;
|
|
|
|
vp_errgain_val &= ~vdd->vp_reg.vpconfig_errorgain_mask;
|
|
|
|
vp_errgain_val |= vdd->vp_reg.vpconfig_errorgain <<
|
|
|
|
vdd->vp_reg.vpconfig_errorgain_shift;
|
|
|
|
vdd->write_reg(vp_errgain_val, vp_mod,
|
|
|
|
vdd->vp_offs.vpconfig);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void _post_volt_scale(struct omap_vdd_info *vdd,
|
|
|
|
unsigned long target_volt, u8 target_vsel, u8 current_vsel)
|
|
|
|
{
|
|
|
|
u32 smps_steps = 0, smps_delay = 0;
|
|
|
|
|
|
|
|
smps_steps = abs(target_vsel - current_vsel);
|
|
|
|
/* SMPS slew rate / step size. 2us added as buffer. */
|
|
|
|
smps_delay = ((smps_steps * vdd->pmic_info->step_size) /
|
|
|
|
vdd->pmic_info->slew_rate) + 2;
|
|
|
|
udelay(smps_delay);
|
|
|
|
|
|
|
|
vdd->curr_volt = target_volt;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* vc_bypass_scale_voltage - VC bypass method of voltage scaling */
|
|
|
|
static int vc_bypass_scale_voltage(struct omap_vdd_info *vdd,
|
|
|
|
unsigned long target_volt)
|
|
|
|
{
|
|
|
|
u32 loop_cnt = 0, retries_cnt = 0;
|
|
|
|
u32 vc_valid, vc_bypass_val_reg, vc_bypass_value;
|
|
|
|
u16 mod;
|
|
|
|
u8 target_vsel, current_vsel;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = _pre_volt_scale(vdd, target_volt, &target_vsel, ¤t_vsel);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
mod = vdd->vc_reg.prm_mod;
|
|
|
|
|
|
|
|
vc_valid = vdd->vc_reg.valid;
|
|
|
|
vc_bypass_val_reg = vdd->vc_reg.bypass_val_reg;
|
|
|
|
vc_bypass_value = (target_vsel << vdd->vc_reg.data_shift) |
|
|
|
|
(vdd->pmic_info->pmic_reg <<
|
|
|
|
vdd->vc_reg.regaddr_shift) |
|
|
|
|
(vdd->pmic_info->i2c_slave_addr <<
|
|
|
|
vdd->vc_reg.slaveaddr_shift);
|
|
|
|
|
|
|
|
vdd->write_reg(vc_bypass_value, mod, vc_bypass_val_reg);
|
|
|
|
vdd->write_reg(vc_bypass_value | vc_valid, mod, vc_bypass_val_reg);
|
|
|
|
|
|
|
|
vc_bypass_value = vdd->read_reg(mod, vc_bypass_val_reg);
|
|
|
|
/*
|
|
|
|
* Loop till the bypass command is acknowledged from the SMPS.
|
|
|
|
* NOTE: This is legacy code. The loop count and retry count needs
|
|
|
|
* to be revisited.
|
|
|
|
*/
|
|
|
|
while (!(vc_bypass_value & vc_valid)) {
|
|
|
|
loop_cnt++;
|
|
|
|
|
|
|
|
if (retries_cnt > 10) {
|
|
|
|
pr_warning("%s: Retry count exceeded\n", __func__);
|
|
|
|
return -ETIMEDOUT;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (loop_cnt > 50) {
|
|
|
|
retries_cnt++;
|
|
|
|
loop_cnt = 0;
|
|
|
|
udelay(10);
|
|
|
|
}
|
|
|
|
vc_bypass_value = vdd->read_reg(mod, vc_bypass_val_reg);
|
|
|
|
}
|
|
|
|
|
|
|
|
_post_volt_scale(vdd, target_volt, target_vsel, current_vsel);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* VP force update method of voltage scaling */
|
|
|
|
static int vp_forceupdate_scale_voltage(struct omap_vdd_info *vdd,
|
|
|
|
unsigned long target_volt)
|
|
|
|
{
|
|
|
|
u32 vpconfig;
|
|
|
|
u16 mod, ocp_mod;
|
|
|
|
u8 target_vsel, current_vsel, prm_irqst_reg;
|
|
|
|
int ret, timeout = 0;
|
|
|
|
|
|
|
|
ret = _pre_volt_scale(vdd, target_volt, &target_vsel, ¤t_vsel);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
mod = vdd->vp_reg.prm_mod;
|
|
|
|
ocp_mod = vdd->ocp_mod;
|
|
|
|
prm_irqst_reg = vdd->prm_irqst_reg;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Clear all pending TransactionDone interrupt/status. Typical latency
|
|
|
|
* is <3us
|
|
|
|
*/
|
|
|
|
while (timeout++ < VP_TRANXDONE_TIMEOUT) {
|
|
|
|
vdd->write_reg(vdd->vp_reg.tranxdone_status,
|
|
|
|
ocp_mod, prm_irqst_reg);
|
|
|
|
if (!(vdd->read_reg(ocp_mod, prm_irqst_reg) &
|
|
|
|
vdd->vp_reg.tranxdone_status))
|
|
|
|
break;
|
|
|
|
udelay(1);
|
|
|
|
}
|
|
|
|
if (timeout >= VP_TRANXDONE_TIMEOUT) {
|
|
|
|
pr_warning("%s: vdd_%s TRANXDONE timeout exceeded."
|
|
|
|
"Voltage change aborted", __func__, vdd->voltdm.name);
|
|
|
|
return -ETIMEDOUT;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Configure for VP-Force Update */
|
|
|
|
vpconfig = vdd->read_reg(mod, vdd->vp_offs.vpconfig);
|
|
|
|
vpconfig &= ~(vdd->vp_reg.vpconfig_initvdd |
|
|
|
|
vdd->vp_reg.vpconfig_forceupdate |
|
|
|
|
vdd->vp_reg.vpconfig_initvoltage_mask);
|
|
|
|
vpconfig |= ((target_vsel <<
|
|
|
|
vdd->vp_reg.vpconfig_initvoltage_shift));
|
|
|
|
vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
|
|
|
|
|
|
|
|
/* Trigger initVDD value copy to voltage processor */
|
|
|
|
vpconfig |= vdd->vp_reg.vpconfig_initvdd;
|
|
|
|
vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
|
|
|
|
|
|
|
|
/* Force update of voltage */
|
|
|
|
vpconfig |= vdd->vp_reg.vpconfig_forceupdate;
|
|
|
|
vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Wait for TransactionDone. Typical latency is <200us.
|
|
|
|
* Depends on SMPSWAITTIMEMIN/MAX and voltage change
|
|
|
|
*/
|
|
|
|
timeout = 0;
|
|
|
|
omap_test_timeout((vdd->read_reg(ocp_mod, prm_irqst_reg) &
|
|
|
|
vdd->vp_reg.tranxdone_status),
|
|
|
|
VP_TRANXDONE_TIMEOUT, timeout);
|
|
|
|
if (timeout >= VP_TRANXDONE_TIMEOUT)
|
|
|
|
pr_err("%s: vdd_%s TRANXDONE timeout exceeded."
|
|
|
|
"TRANXDONE never got set after the voltage update\n",
|
|
|
|
__func__, vdd->voltdm.name);
|
|
|
|
|
|
|
|
_post_volt_scale(vdd, target_volt, target_vsel, current_vsel);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Disable TransactionDone interrupt , clear all status, clear
|
|
|
|
* control registers
|
|
|
|
*/
|
|
|
|
timeout = 0;
|
|
|
|
while (timeout++ < VP_TRANXDONE_TIMEOUT) {
|
|
|
|
vdd->write_reg(vdd->vp_reg.tranxdone_status,
|
|
|
|
ocp_mod, prm_irqst_reg);
|
|
|
|
if (!(vdd->read_reg(ocp_mod, prm_irqst_reg) &
|
|
|
|
vdd->vp_reg.tranxdone_status))
|
|
|
|
break;
|
|
|
|
udelay(1);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (timeout >= VP_TRANXDONE_TIMEOUT)
|
|
|
|
pr_warning("%s: vdd_%s TRANXDONE timeout exceeded while trying"
|
|
|
|
"to clear the TRANXDONE status\n",
|
|
|
|
__func__, vdd->voltdm.name);
|
|
|
|
|
|
|
|
vpconfig = vdd->read_reg(mod, vdd->vp_offs.vpconfig);
|
|
|
|
/* Clear initVDD copy trigger bit */
|
|
|
|
vpconfig &= ~vdd->vp_reg.vpconfig_initvdd;;
|
|
|
|
vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
|
|
|
|
/* Clear force bit */
|
|
|
|
vpconfig &= ~vdd->vp_reg.vpconfig_forceupdate;
|
|
|
|
vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* OMAP3 specific voltage init functions */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Intializes the voltage controller registers with the PMIC and board
|
|
|
|
* specific parameters and voltage setup times for OMAP3.
|
|
|
|
*/
|
|
|
|
static void __init omap3_vc_init(struct omap_vdd_info *vdd)
|
|
|
|
{
|
|
|
|
u32 vc_val;
|
|
|
|
u16 mod;
|
|
|
|
u8 on_vsel, onlp_vsel, ret_vsel, off_vsel;
|
|
|
|
static bool is_initialized;
|
|
|
|
|
|
|
|
if (!vdd->pmic_info || !vdd->pmic_info->uv_to_vsel) {
|
|
|
|
pr_err("%s: PMIC info requried to configure vc for"
|
|
|
|
"vdd_%s not populated.Hence cannot initialize vc\n",
|
|
|
|
__func__, vdd->voltdm.name);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!vdd->read_reg || !vdd->write_reg) {
|
|
|
|
pr_err("%s: No read/write API for accessing vdd_%s regs\n",
|
|
|
|
__func__, vdd->voltdm.name);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
mod = vdd->vc_reg.prm_mod;
|
|
|
|
|
|
|
|
/* Set up the SMPS_SA(i2c slave address in VC */
|
|
|
|
vc_val = vdd->read_reg(mod, vdd->vc_reg.smps_sa_reg);
|
|
|
|
vc_val &= ~vdd->vc_reg.smps_sa_mask;
|
|
|
|
vc_val |= vdd->pmic_info->i2c_slave_addr << vdd->vc_reg.smps_sa_shift;
|
|
|
|
vdd->write_reg(vc_val, mod, vdd->vc_reg.smps_sa_reg);
|
|
|
|
|
|
|
|
/* Setup the VOLRA(pmic reg addr) in VC */
|
|
|
|
vc_val = vdd->read_reg(mod, vdd->vc_reg.smps_volra_reg);
|
|
|
|
vc_val &= ~vdd->vc_reg.smps_volra_mask;
|
|
|
|
vc_val |= vdd->pmic_info->pmic_reg << vdd->vc_reg.smps_volra_shift;
|
|
|
|
vdd->write_reg(vc_val, mod, vdd->vc_reg.smps_volra_reg);
|
|
|
|
|
|
|
|
/*Configure the setup times */
|
|
|
|
vc_val = vdd->read_reg(mod, vdd->vc_reg.voltsetup_reg);
|
|
|
|
vc_val &= ~vdd->vc_reg.voltsetup_mask;
|
|
|
|
vc_val |= vdd->pmic_info->volt_setup_time <<
|
|
|
|
vdd->vc_reg.voltsetup_shift;
|
|
|
|
vdd->write_reg(vc_val, mod, vdd->vc_reg.voltsetup_reg);
|
|
|
|
|
|
|
|
/* Set up the on, inactive, retention and off voltage */
|
|
|
|
on_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->on_volt);
|
|
|
|
onlp_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->onlp_volt);
|
|
|
|
ret_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->ret_volt);
|
|
|
|
off_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->off_volt);
|
|
|
|
vc_val = ((on_vsel << vdd->vc_reg.cmd_on_shift) |
|
|
|
|
(onlp_vsel << vdd->vc_reg.cmd_onlp_shift) |
|
|
|
|
(ret_vsel << vdd->vc_reg.cmd_ret_shift) |
|
|
|
|
(off_vsel << vdd->vc_reg.cmd_off_shift));
|
|
|
|
vdd->write_reg(vc_val, mod, vdd->vc_reg.cmdval_reg);
|
|
|
|
|
|
|
|
if (is_initialized)
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* Generic VC parameters init */
|
|
|
|
vdd->write_reg(OMAP3430_CMD1_MASK | OMAP3430_RAV1_MASK, mod,
|
|
|
|
OMAP3_PRM_VC_CH_CONF_OFFSET);
|
|
|
|
vdd->write_reg(OMAP3430_MCODE_SHIFT | OMAP3430_HSEN_MASK, mod,
|
|
|
|
OMAP3_PRM_VC_I2C_CFG_OFFSET);
|
|
|
|
vdd->write_reg(OMAP3_CLKSETUP, mod, OMAP3_PRM_CLKSETUP_OFFSET);
|
|
|
|
vdd->write_reg(OMAP3_VOLTOFFSET, mod, OMAP3_PRM_VOLTOFFSET_OFFSET);
|
|
|
|
vdd->write_reg(OMAP3_VOLTSETUP2, mod, OMAP3_PRM_VOLTSETUP2_OFFSET);
|
|
|
|
is_initialized = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Sets up all the VDD related info for OMAP3 */
|
|
|
|
static int __init omap3_vdd_data_configure(struct omap_vdd_info *vdd)
|
|
|
|
{
|
|
|
|
struct clk *sys_ck;
|
|
|
|
u32 sys_clk_speed, timeout_val, waittime;
|
|
|
|
|
|
|
|
if (!vdd->pmic_info) {
|
|
|
|
pr_err("%s: PMIC info requried to configure vdd_%s not"
|
|
|
|
"populated.Hence cannot initialize vdd_%s\n",
|
|
|
|
__func__, vdd->voltdm.name, vdd->voltdm.name);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!strcmp(vdd->voltdm.name, "mpu")) {
|
|
|
|
if (cpu_is_omap3630())
|
|
|
|
vdd->volt_data = omap36xx_vddmpu_volt_data;
|
|
|
|
else
|
|
|
|
vdd->volt_data = omap34xx_vddmpu_volt_data;
|
|
|
|
|
|
|
|
vdd->vp_reg.tranxdone_status = OMAP3430_VP1_TRANXDONE_ST_MASK;
|
|
|
|
vdd->vc_reg.cmdval_reg = OMAP3_PRM_VC_CMD_VAL_0_OFFSET;
|
|
|
|
vdd->vc_reg.smps_sa_shift = OMAP3430_PRM_VC_SMPS_SA_SA0_SHIFT;
|
|
|
|
vdd->vc_reg.smps_sa_mask = OMAP3430_PRM_VC_SMPS_SA_SA0_MASK;
|
|
|
|
vdd->vc_reg.smps_volra_shift = OMAP3430_VOLRA0_SHIFT;
|
|
|
|
vdd->vc_reg.smps_volra_mask = OMAP3430_VOLRA0_MASK;
|
|
|
|
vdd->vc_reg.voltsetup_shift = OMAP3430_SETUP_TIME1_SHIFT;
|
|
|
|
vdd->vc_reg.voltsetup_mask = OMAP3430_SETUP_TIME1_MASK;
|
|
|
|
} else if (!strcmp(vdd->voltdm.name, "core")) {
|
|
|
|
if (cpu_is_omap3630())
|
|
|
|
vdd->volt_data = omap36xx_vddcore_volt_data;
|
|
|
|
else
|
|
|
|
vdd->volt_data = omap34xx_vddcore_volt_data;
|
|
|
|
|
|
|
|
vdd->vp_reg.tranxdone_status = OMAP3430_VP2_TRANXDONE_ST_MASK;
|
|
|
|
vdd->vc_reg.cmdval_reg = OMAP3_PRM_VC_CMD_VAL_1_OFFSET;
|
|
|
|
vdd->vc_reg.smps_sa_shift = OMAP3430_PRM_VC_SMPS_SA_SA1_SHIFT;
|
|
|
|
vdd->vc_reg.smps_sa_mask = OMAP3430_PRM_VC_SMPS_SA_SA1_MASK;
|
|
|
|
vdd->vc_reg.smps_volra_shift = OMAP3430_VOLRA1_SHIFT;
|
|
|
|
vdd->vc_reg.smps_volra_mask = OMAP3430_VOLRA1_MASK;
|
|
|
|
vdd->vc_reg.voltsetup_shift = OMAP3430_SETUP_TIME2_SHIFT;
|
|
|
|
vdd->vc_reg.voltsetup_mask = OMAP3430_SETUP_TIME2_MASK;
|
|
|
|
} else {
|
|
|
|
pr_warning("%s: vdd_%s does not exisit in OMAP3\n",
|
|
|
|
__func__, vdd->voltdm.name);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Sys clk rate is require to calculate vp timeout value and
|
|
|
|
* smpswaittimemin and smpswaittimemax.
|
|
|
|
*/
|
|
|
|
sys_ck = clk_get(NULL, "sys_ck");
|
|
|
|
if (IS_ERR(sys_ck)) {
|
|
|
|
pr_warning("%s: Could not get the sys clk to calculate"
|
|
|
|
"various vdd_%s params\n", __func__, vdd->voltdm.name);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
sys_clk_speed = clk_get_rate(sys_ck);
|
|
|
|
clk_put(sys_ck);
|
|
|
|
/* Divide to avoid overflow */
|
|
|
|
sys_clk_speed /= 1000;
|
|
|
|
|
|
|
|
/* Generic voltage parameters */
|
|
|
|
vdd->curr_volt = 1200000;
|
|
|
|
vdd->ocp_mod = OCP_MOD;
|
|
|
|
vdd->prm_irqst_reg = OMAP3_PRM_IRQSTATUS_MPU_OFFSET;
|
|
|
|
vdd->read_reg = omap3_voltage_read_reg;
|
|
|
|
vdd->write_reg = omap3_voltage_write_reg;
|
|
|
|
vdd->volt_scale = vp_forceupdate_scale_voltage;
|
|
|
|
vdd->vp_enabled = false;
|
|
|
|
|
|
|
|
/* VC parameters */
|
|
|
|
vdd->vc_reg.prm_mod = OMAP3430_GR_MOD;
|
|
|
|
vdd->vc_reg.smps_sa_reg = OMAP3_PRM_VC_SMPS_SA_OFFSET;
|
|
|
|
vdd->vc_reg.smps_volra_reg = OMAP3_PRM_VC_SMPS_VOL_RA_OFFSET;
|
|
|
|
vdd->vc_reg.bypass_val_reg = OMAP3_PRM_VC_BYPASS_VAL_OFFSET;
|
|
|
|
vdd->vc_reg.voltsetup_reg = OMAP3_PRM_VOLTSETUP1_OFFSET;
|
|
|
|
vdd->vc_reg.data_shift = OMAP3430_DATA_SHIFT;
|
|
|
|
vdd->vc_reg.slaveaddr_shift = OMAP3430_SLAVEADDR_SHIFT;
|
|
|
|
vdd->vc_reg.regaddr_shift = OMAP3430_REGADDR_SHIFT;
|
|
|
|
vdd->vc_reg.valid = OMAP3430_VALID_MASK;
|
|
|
|
vdd->vc_reg.cmd_on_shift = OMAP3430_VC_CMD_ON_SHIFT;
|
|
|
|
vdd->vc_reg.cmd_on_mask = OMAP3430_VC_CMD_ON_MASK;
|
|
|
|
vdd->vc_reg.cmd_onlp_shift = OMAP3430_VC_CMD_ONLP_SHIFT;
|
|
|
|
vdd->vc_reg.cmd_ret_shift = OMAP3430_VC_CMD_RET_SHIFT;
|
|
|
|
vdd->vc_reg.cmd_off_shift = OMAP3430_VC_CMD_OFF_SHIFT;
|
|
|
|
|
|
|
|
vdd->vp_reg.prm_mod = OMAP3430_GR_MOD;
|
|
|
|
|
|
|
|
/* VPCONFIG bit fields */
|
|
|
|
vdd->vp_reg.vpconfig_erroroffset = (vdd->pmic_info->vp_erroroffset <<
|
|
|
|
OMAP3430_ERROROFFSET_SHIFT);
|
|
|
|
vdd->vp_reg.vpconfig_errorgain_mask = OMAP3430_ERRORGAIN_MASK;
|
|
|
|
vdd->vp_reg.vpconfig_errorgain_shift = OMAP3430_ERRORGAIN_SHIFT;
|
|
|
|
vdd->vp_reg.vpconfig_initvoltage_shift = OMAP3430_INITVOLTAGE_SHIFT;
|
|
|
|
vdd->vp_reg.vpconfig_initvoltage_mask = OMAP3430_INITVOLTAGE_MASK;
|
|
|
|
vdd->vp_reg.vpconfig_timeouten = OMAP3430_TIMEOUTEN_MASK;
|
|
|
|
vdd->vp_reg.vpconfig_initvdd = OMAP3430_INITVDD_MASK;
|
|
|
|
vdd->vp_reg.vpconfig_forceupdate = OMAP3430_FORCEUPDATE_MASK;
|
|
|
|
vdd->vp_reg.vpconfig_vpenable = OMAP3430_VPENABLE_MASK;
|
|
|
|
|
|
|
|
/* VSTEPMIN VSTEPMAX bit fields */
|
|
|
|
waittime = ((vdd->pmic_info->step_size / vdd->pmic_info->slew_rate) *
|
|
|
|
sys_clk_speed) / 1000;
|
|
|
|
vdd->vp_reg.vstepmin_smpswaittimemin = waittime;
|
|
|
|
vdd->vp_reg.vstepmax_smpswaittimemax = waittime;
|
|
|
|
vdd->vp_reg.vstepmin_stepmin = vdd->pmic_info->vp_vstepmin;
|
|
|
|
vdd->vp_reg.vstepmax_stepmax = vdd->pmic_info->vp_vstepmax;
|
|
|
|
vdd->vp_reg.vstepmin_smpswaittimemin_shift =
|
|
|
|
OMAP3430_SMPSWAITTIMEMIN_SHIFT;
|
|
|
|
vdd->vp_reg.vstepmax_smpswaittimemax_shift =
|
|
|
|
OMAP3430_SMPSWAITTIMEMAX_SHIFT;
|
|
|
|
vdd->vp_reg.vstepmin_stepmin_shift = OMAP3430_VSTEPMIN_SHIFT;
|
|
|
|
vdd->vp_reg.vstepmax_stepmax_shift = OMAP3430_VSTEPMAX_SHIFT;
|
|
|
|
|
|
|
|
/* VLIMITTO bit fields */
|
|
|
|
timeout_val = (sys_clk_speed * vdd->pmic_info->vp_timeout_us) / 1000;
|
|
|
|
vdd->vp_reg.vlimitto_timeout = timeout_val;
|
|
|
|
vdd->vp_reg.vlimitto_vddmin = vdd->pmic_info->vp_vddmin;
|
|
|
|
vdd->vp_reg.vlimitto_vddmax = vdd->pmic_info->vp_vddmax;
|
|
|
|
vdd->vp_reg.vlimitto_vddmin_shift = OMAP3430_VDDMIN_SHIFT;
|
|
|
|
vdd->vp_reg.vlimitto_vddmax_shift = OMAP3430_VDDMAX_SHIFT;
|
|
|
|
vdd->vp_reg.vlimitto_timeout_shift = OMAP3430_TIMEOUT_SHIFT;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-12-10 18:45:23 +01:00
|
|
|
/* OMAP4 specific voltage init functions */
|
|
|
|
static void __init omap4_vc_init(struct omap_vdd_info *vdd)
|
|
|
|
{
|
|
|
|
u32 vc_val;
|
|
|
|
u16 mod;
|
|
|
|
static bool is_initialized;
|
|
|
|
|
|
|
|
if (!vdd->pmic_info || !vdd->pmic_info->uv_to_vsel) {
|
|
|
|
pr_err("%s: PMIC info requried to configure vc for"
|
|
|
|
"vdd_%s not populated.Hence cannot initialize vc\n",
|
|
|
|
__func__, vdd->voltdm.name);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!vdd->read_reg || !vdd->write_reg) {
|
|
|
|
pr_err("%s: No read/write API for accessing vdd_%s regs\n",
|
|
|
|
__func__, vdd->voltdm.name);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
mod = vdd->vc_reg.prm_mod;
|
|
|
|
|
|
|
|
/* Set up the SMPS_SA(i2c slave address in VC */
|
|
|
|
vc_val = vdd->read_reg(mod, vdd->vc_reg.smps_sa_reg);
|
|
|
|
vc_val &= ~vdd->vc_reg.smps_sa_mask;
|
|
|
|
vc_val |= vdd->pmic_info->i2c_slave_addr << vdd->vc_reg.smps_sa_shift;
|
|
|
|
vdd->write_reg(vc_val, mod, vdd->vc_reg.smps_sa_reg);
|
|
|
|
|
|
|
|
/* Setup the VOLRA(pmic reg addr) in VC */
|
|
|
|
vc_val = vdd->read_reg(mod, vdd->vc_reg.smps_volra_reg);
|
|
|
|
vc_val &= ~vdd->vc_reg.smps_volra_mask;
|
|
|
|
vc_val |= vdd->pmic_info->pmic_reg << vdd->vc_reg.smps_volra_shift;
|
|
|
|
vdd->write_reg(vc_val, mod, vdd->vc_reg.smps_volra_reg);
|
|
|
|
|
|
|
|
/* TODO: Configure setup times and CMD_VAL values*/
|
|
|
|
|
|
|
|
if (is_initialized)
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* Generic VC parameters init */
|
|
|
|
vc_val = (OMAP4430_RAV_VDD_MPU_L_MASK | OMAP4430_CMD_VDD_MPU_L_MASK |
|
|
|
|
OMAP4430_RAV_VDD_IVA_L_MASK | OMAP4430_CMD_VDD_IVA_L_MASK |
|
|
|
|
OMAP4430_RAV_VDD_CORE_L_MASK | OMAP4430_CMD_VDD_CORE_L_MASK);
|
|
|
|
vdd->write_reg(vc_val, mod, OMAP4_PRM_VC_CFG_CHANNEL_OFFSET);
|
|
|
|
|
|
|
|
vc_val = (0x60 << OMAP4430_SCLL_SHIFT | 0x26 << OMAP4430_SCLH_SHIFT);
|
|
|
|
vdd->write_reg(vc_val, mod, OMAP4_PRM_VC_CFG_I2C_CLK_OFFSET);
|
|
|
|
|
|
|
|
is_initialized = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Sets up all the VDD related info for OMAP4 */
|
|
|
|
static int __init omap4_vdd_data_configure(struct omap_vdd_info *vdd)
|
|
|
|
{
|
|
|
|
struct clk *sys_ck;
|
|
|
|
u32 sys_clk_speed, timeout_val, waittime;
|
|
|
|
|
|
|
|
if (!vdd->pmic_info) {
|
|
|
|
pr_err("%s: PMIC info requried to configure vdd_%s not"
|
|
|
|
"populated.Hence cannot initialize vdd_%s\n",
|
|
|
|
__func__, vdd->voltdm.name, vdd->voltdm.name);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!strcmp(vdd->voltdm.name, "mpu")) {
|
|
|
|
vdd->volt_data = omap44xx_vdd_mpu_volt_data;
|
|
|
|
vdd->vp_reg.tranxdone_status =
|
|
|
|
OMAP4430_VP_MPU_TRANXDONE_ST_MASK;
|
|
|
|
vdd->vc_reg.cmdval_reg = OMAP4_PRM_VC_VAL_CMD_VDD_MPU_L_OFFSET;
|
|
|
|
vdd->vc_reg.smps_sa_shift =
|
|
|
|
OMAP4430_SA_VDD_MPU_L_PRM_VC_SMPS_SA_SHIFT;
|
|
|
|
vdd->vc_reg.smps_sa_mask =
|
|
|
|
OMAP4430_SA_VDD_MPU_L_PRM_VC_SMPS_SA_MASK;
|
|
|
|
vdd->vc_reg.smps_volra_shift = OMAP4430_VOLRA_VDD_MPU_L_SHIFT;
|
|
|
|
vdd->vc_reg.smps_volra_mask = OMAP4430_VOLRA_VDD_MPU_L_MASK;
|
|
|
|
vdd->vc_reg.voltsetup_reg =
|
|
|
|
OMAP4_PRM_VOLTSETUP_MPU_RET_SLEEP_OFFSET;
|
|
|
|
vdd->prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET;
|
|
|
|
} else if (!strcmp(vdd->voltdm.name, "core")) {
|
|
|
|
vdd->volt_data = omap44xx_vdd_core_volt_data;
|
|
|
|
vdd->vp_reg.tranxdone_status =
|
|
|
|
OMAP4430_VP_CORE_TRANXDONE_ST_MASK;
|
|
|
|
vdd->vc_reg.cmdval_reg =
|
|
|
|
OMAP4_PRM_VC_VAL_CMD_VDD_CORE_L_OFFSET;
|
|
|
|
vdd->vc_reg.smps_sa_shift = OMAP4430_SA_VDD_CORE_L_0_6_SHIFT;
|
|
|
|
vdd->vc_reg.smps_sa_mask = OMAP4430_SA_VDD_CORE_L_0_6_MASK;
|
|
|
|
vdd->vc_reg.smps_volra_shift = OMAP4430_VOLRA_VDD_CORE_L_SHIFT;
|
|
|
|
vdd->vc_reg.smps_volra_mask = OMAP4430_VOLRA_VDD_CORE_L_MASK;
|
|
|
|
vdd->vc_reg.voltsetup_reg =
|
|
|
|
OMAP4_PRM_VOLTSETUP_CORE_RET_SLEEP_OFFSET;
|
|
|
|
vdd->prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_OFFSET;
|
|
|
|
} else if (!strcmp(vdd->voltdm.name, "iva")) {
|
|
|
|
vdd->volt_data = omap44xx_vdd_iva_volt_data;
|
|
|
|
vdd->vp_reg.tranxdone_status =
|
|
|
|
OMAP4430_VP_IVA_TRANXDONE_ST_MASK;
|
|
|
|
vdd->vc_reg.cmdval_reg = OMAP4_PRM_VC_VAL_CMD_VDD_IVA_L_OFFSET;
|
|
|
|
vdd->vc_reg.smps_sa_shift =
|
|
|
|
OMAP4430_SA_VDD_IVA_L_PRM_VC_SMPS_SA_SHIFT;
|
|
|
|
vdd->vc_reg.smps_sa_mask =
|
|
|
|
OMAP4430_SA_VDD_IVA_L_PRM_VC_SMPS_SA_MASK;
|
|
|
|
vdd->vc_reg.smps_volra_shift = OMAP4430_VOLRA_VDD_IVA_L_SHIFT;
|
|
|
|
vdd->vc_reg.smps_volra_mask = OMAP4430_VOLRA_VDD_IVA_L_MASK;
|
|
|
|
vdd->vc_reg.voltsetup_reg =
|
|
|
|
OMAP4_PRM_VOLTSETUP_IVA_RET_SLEEP_OFFSET;
|
|
|
|
vdd->prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_OFFSET;
|
|
|
|
} else {
|
|
|
|
pr_warning("%s: vdd_%s does not exisit in OMAP4\n",
|
|
|
|
__func__, vdd->voltdm.name);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Sys clk rate is require to calculate vp timeout value and
|
|
|
|
* smpswaittimemin and smpswaittimemax.
|
|
|
|
*/
|
|
|
|
sys_ck = clk_get(NULL, "sys_clkin_ck");
|
|
|
|
if (IS_ERR(sys_ck)) {
|
|
|
|
pr_warning("%s: Could not get the sys clk to calculate"
|
|
|
|
"various vdd_%s params\n", __func__, vdd->voltdm.name);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
sys_clk_speed = clk_get_rate(sys_ck);
|
|
|
|
clk_put(sys_ck);
|
|
|
|
/* Divide to avoid overflow */
|
|
|
|
sys_clk_speed /= 1000;
|
|
|
|
|
|
|
|
/* Generic voltage parameters */
|
|
|
|
vdd->curr_volt = 1200000;
|
|
|
|
vdd->ocp_mod = OMAP4430_PRM_OCP_SOCKET_INST;
|
|
|
|
vdd->read_reg = omap4_voltage_read_reg;
|
|
|
|
vdd->write_reg = omap4_voltage_write_reg;
|
|
|
|
vdd->volt_scale = vp_forceupdate_scale_voltage;
|
|
|
|
vdd->vp_enabled = false;
|
|
|
|
|
|
|
|
/* VC parameters */
|
|
|
|
vdd->vc_reg.prm_mod = OMAP4430_PRM_DEVICE_INST;
|
|
|
|
vdd->vc_reg.smps_sa_reg = OMAP4_PRM_VC_SMPS_SA_OFFSET;
|
|
|
|
vdd->vc_reg.smps_volra_reg = OMAP4_PRM_VC_VAL_SMPS_RA_VOL_OFFSET;
|
|
|
|
vdd->vc_reg.bypass_val_reg = OMAP4_PRM_VC_VAL_BYPASS_OFFSET;
|
|
|
|
vdd->vc_reg.data_shift = OMAP4430_DATA_SHIFT;
|
|
|
|
vdd->vc_reg.slaveaddr_shift = OMAP4430_SLAVEADDR_SHIFT;
|
|
|
|
vdd->vc_reg.regaddr_shift = OMAP4430_REGADDR_SHIFT;
|
|
|
|
vdd->vc_reg.valid = OMAP4430_VALID_MASK;
|
|
|
|
vdd->vc_reg.cmd_on_shift = OMAP4430_ON_SHIFT;
|
|
|
|
vdd->vc_reg.cmd_on_mask = OMAP4430_ON_MASK;
|
|
|
|
vdd->vc_reg.cmd_onlp_shift = OMAP4430_ONLP_SHIFT;
|
|
|
|
vdd->vc_reg.cmd_ret_shift = OMAP4430_RET_SHIFT;
|
|
|
|
vdd->vc_reg.cmd_off_shift = OMAP4430_OFF_SHIFT;
|
|
|
|
|
|
|
|
vdd->vp_reg.prm_mod = OMAP4430_PRM_DEVICE_INST;
|
|
|
|
|
|
|
|
/* VPCONFIG bit fields */
|
|
|
|
vdd->vp_reg.vpconfig_erroroffset = (vdd->pmic_info->vp_erroroffset <<
|
|
|
|
OMAP4430_ERROROFFSET_SHIFT);
|
|
|
|
vdd->vp_reg.vpconfig_errorgain_mask = OMAP4430_ERRORGAIN_MASK;
|
|
|
|
vdd->vp_reg.vpconfig_errorgain_shift = OMAP4430_ERRORGAIN_SHIFT;
|
|
|
|
vdd->vp_reg.vpconfig_initvoltage_shift = OMAP4430_INITVOLTAGE_SHIFT;
|
|
|
|
vdd->vp_reg.vpconfig_initvoltage_mask = OMAP4430_INITVOLTAGE_MASK;
|
|
|
|
vdd->vp_reg.vpconfig_timeouten = OMAP4430_TIMEOUTEN_MASK;
|
|
|
|
vdd->vp_reg.vpconfig_initvdd = OMAP4430_INITVDD_MASK;
|
|
|
|
vdd->vp_reg.vpconfig_forceupdate = OMAP4430_FORCEUPDATE_MASK;
|
|
|
|
vdd->vp_reg.vpconfig_vpenable = OMAP4430_VPENABLE_MASK;
|
|
|
|
|
|
|
|
/* VSTEPMIN VSTEPMAX bit fields */
|
|
|
|
waittime = ((vdd->pmic_info->step_size / vdd->pmic_info->slew_rate) *
|
|
|
|
sys_clk_speed) / 1000;
|
|
|
|
vdd->vp_reg.vstepmin_smpswaittimemin = waittime;
|
|
|
|
vdd->vp_reg.vstepmax_smpswaittimemax = waittime;
|
|
|
|
vdd->vp_reg.vstepmin_stepmin = vdd->pmic_info->vp_vstepmin;
|
|
|
|
vdd->vp_reg.vstepmax_stepmax = vdd->pmic_info->vp_vstepmax;
|
|
|
|
vdd->vp_reg.vstepmin_smpswaittimemin_shift =
|
|
|
|
OMAP4430_SMPSWAITTIMEMIN_SHIFT;
|
|
|
|
vdd->vp_reg.vstepmax_smpswaittimemax_shift =
|
|
|
|
OMAP4430_SMPSWAITTIMEMAX_SHIFT;
|
|
|
|
vdd->vp_reg.vstepmin_stepmin_shift = OMAP4430_VSTEPMIN_SHIFT;
|
|
|
|
vdd->vp_reg.vstepmax_stepmax_shift = OMAP4430_VSTEPMAX_SHIFT;
|
|
|
|
|
|
|
|
/* VLIMITTO bit fields */
|
|
|
|
timeout_val = (sys_clk_speed * vdd->pmic_info->vp_timeout_us) / 1000;
|
|
|
|
vdd->vp_reg.vlimitto_timeout = timeout_val;
|
|
|
|
vdd->vp_reg.vlimitto_vddmin = vdd->pmic_info->vp_vddmin;
|
|
|
|
vdd->vp_reg.vlimitto_vddmax = vdd->pmic_info->vp_vddmax;
|
|
|
|
vdd->vp_reg.vlimitto_vddmin_shift = OMAP4430_VDDMIN_SHIFT;
|
|
|
|
vdd->vp_reg.vlimitto_vddmax_shift = OMAP4430_VDDMAX_SHIFT;
|
|
|
|
vdd->vp_reg.vlimitto_timeout_shift = OMAP4430_TIMEOUT_SHIFT;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-05-29 18:32:21 +02:00
|
|
|
/* Public functions */
|
|
|
|
/**
|
|
|
|
* omap_voltage_get_nom_volt() - Gets the current non-auto-compensated voltage
|
|
|
|
* @voltdm: pointer to the VDD for which current voltage info is needed
|
|
|
|
*
|
|
|
|
* API to get the current non-auto-compensated voltage for a VDD.
|
|
|
|
* Returns 0 in case of error else returns the current voltage for the VDD.
|
|
|
|
*/
|
|
|
|
unsigned long omap_voltage_get_nom_volt(struct voltagedomain *voltdm)
|
|
|
|
{
|
|
|
|
struct omap_vdd_info *vdd;
|
|
|
|
|
|
|
|
if (!voltdm || IS_ERR(voltdm)) {
|
|
|
|
pr_warning("%s: VDD specified does not exist!\n", __func__);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
|
|
|
|
|
|
|
|
return vdd->curr_volt;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* omap_vp_get_curr_volt() - API to get the current vp voltage.
|
|
|
|
* @voltdm: pointer to the VDD.
|
|
|
|
*
|
|
|
|
* This API returns the current voltage for the specified voltage processor
|
|
|
|
*/
|
|
|
|
unsigned long omap_vp_get_curr_volt(struct voltagedomain *voltdm)
|
|
|
|
{
|
|
|
|
struct omap_vdd_info *vdd;
|
|
|
|
u8 curr_vsel;
|
|
|
|
|
|
|
|
if (!voltdm || IS_ERR(voltdm)) {
|
|
|
|
pr_warning("%s: VDD specified does not exist!\n", __func__);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
|
|
|
|
if (!vdd->read_reg) {
|
|
|
|
pr_err("%s: No read API for reading vdd_%s regs\n",
|
|
|
|
__func__, voltdm->name);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
curr_vsel = vdd->read_reg(vdd->vp_reg.prm_mod,
|
|
|
|
vdd->vp_offs.voltage);
|
|
|
|
|
|
|
|
if (!vdd->pmic_info || !vdd->pmic_info->vsel_to_uv) {
|
|
|
|
pr_warning("%s: PMIC function to convert vsel to voltage"
|
|
|
|
"in uV not registerd\n", __func__);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
return vdd->pmic_info->vsel_to_uv(curr_vsel);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* omap_vp_enable() - API to enable a particular VP
|
|
|
|
* @voltdm: pointer to the VDD whose VP is to be enabled.
|
|
|
|
*
|
|
|
|
* This API enables a particular voltage processor. Needed by the smartreflex
|
|
|
|
* class drivers.
|
|
|
|
*/
|
|
|
|
void omap_vp_enable(struct voltagedomain *voltdm)
|
|
|
|
{
|
|
|
|
struct omap_vdd_info *vdd;
|
|
|
|
u32 vpconfig;
|
|
|
|
u16 mod;
|
|
|
|
|
|
|
|
if (!voltdm || IS_ERR(voltdm)) {
|
|
|
|
pr_warning("%s: VDD specified does not exist!\n", __func__);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
|
|
|
|
if (!vdd->read_reg || !vdd->write_reg) {
|
|
|
|
pr_err("%s: No read/write API for accessing vdd_%s regs\n",
|
|
|
|
__func__, voltdm->name);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
mod = vdd->vp_reg.prm_mod;
|
|
|
|
|
|
|
|
/* If VP is already enabled, do nothing. Return */
|
|
|
|
if (vdd->vp_enabled)
|
|
|
|
return;
|
|
|
|
|
|
|
|
vp_latch_vsel(vdd);
|
|
|
|
|
|
|
|
/* Enable VP */
|
|
|
|
vpconfig = vdd->read_reg(mod, vdd->vp_offs.vpconfig);
|
|
|
|
vpconfig |= vdd->vp_reg.vpconfig_vpenable;
|
|
|
|
vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
|
|
|
|
vdd->vp_enabled = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* omap_vp_disable() - API to disable a particular VP
|
|
|
|
* @voltdm: pointer to the VDD whose VP is to be disabled.
|
|
|
|
*
|
|
|
|
* This API disables a particular voltage processor. Needed by the smartreflex
|
|
|
|
* class drivers.
|
|
|
|
*/
|
|
|
|
void omap_vp_disable(struct voltagedomain *voltdm)
|
|
|
|
{
|
|
|
|
struct omap_vdd_info *vdd;
|
|
|
|
u32 vpconfig;
|
|
|
|
u16 mod;
|
|
|
|
int timeout;
|
|
|
|
|
|
|
|
if (!voltdm || IS_ERR(voltdm)) {
|
|
|
|
pr_warning("%s: VDD specified does not exist!\n", __func__);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
|
|
|
|
if (!vdd->read_reg || !vdd->write_reg) {
|
|
|
|
pr_err("%s: No read/write API for accessing vdd_%s regs\n",
|
|
|
|
__func__, voltdm->name);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
mod = vdd->vp_reg.prm_mod;
|
|
|
|
|
|
|
|
/* If VP is already disabled, do nothing. Return */
|
|
|
|
if (!vdd->vp_enabled) {
|
|
|
|
pr_warning("%s: Trying to disable VP for vdd_%s when"
|
|
|
|
"it is already disabled\n", __func__, voltdm->name);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Disable VP */
|
|
|
|
vpconfig = vdd->read_reg(mod, vdd->vp_offs.vpconfig);
|
|
|
|
vpconfig &= ~vdd->vp_reg.vpconfig_vpenable;
|
|
|
|
vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Wait for VP idle Typical latency is <2us. Maximum latency is ~100us
|
|
|
|
*/
|
|
|
|
omap_test_timeout((vdd->read_reg(mod, vdd->vp_offs.vstatus)),
|
|
|
|
VP_IDLE_TIMEOUT, timeout);
|
|
|
|
|
|
|
|
if (timeout >= VP_IDLE_TIMEOUT)
|
|
|
|
pr_warning("%s: vdd_%s idle timedout\n",
|
|
|
|
__func__, voltdm->name);
|
|
|
|
|
|
|
|
vdd->vp_enabled = false;
|
|
|
|
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* omap_voltage_scale_vdd() - API to scale voltage of a particular
|
|
|
|
* voltage domain.
|
|
|
|
* @voltdm: pointer to the VDD which is to be scaled.
|
|
|
|
* @target_volt: The target voltage of the voltage domain
|
|
|
|
*
|
|
|
|
* This API should be called by the kernel to do the voltage scaling
|
|
|
|
* for a particular voltage domain during dvfs or any other situation.
|
|
|
|
*/
|
|
|
|
int omap_voltage_scale_vdd(struct voltagedomain *voltdm,
|
|
|
|
unsigned long target_volt)
|
|
|
|
{
|
|
|
|
struct omap_vdd_info *vdd;
|
|
|
|
|
|
|
|
if (!voltdm || IS_ERR(voltdm)) {
|
|
|
|
pr_warning("%s: VDD specified does not exist!\n", __func__);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
|
|
|
|
|
|
|
|
if (!vdd->volt_scale) {
|
|
|
|
pr_err("%s: No voltage scale API registered for vdd_%s\n",
|
|
|
|
__func__, voltdm->name);
|
|
|
|
return -ENODATA;
|
|
|
|
}
|
|
|
|
|
|
|
|
return vdd->volt_scale(vdd, target_volt);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* omap_voltage_reset() - Resets the voltage of a particular voltage domain
|
|
|
|
* to that of the current OPP.
|
|
|
|
* @voltdm: pointer to the VDD whose voltage is to be reset.
|
|
|
|
*
|
|
|
|
* This API finds out the correct voltage the voltage domain is supposed
|
|
|
|
* to be at and resets the voltage to that level. Should be used expecially
|
|
|
|
* while disabling any voltage compensation modules.
|
|
|
|
*/
|
|
|
|
void omap_voltage_reset(struct voltagedomain *voltdm)
|
|
|
|
{
|
|
|
|
unsigned long target_uvdc;
|
|
|
|
|
|
|
|
if (!voltdm || IS_ERR(voltdm)) {
|
|
|
|
pr_warning("%s: VDD specified does not exist!\n", __func__);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
target_uvdc = omap_voltage_get_nom_volt(voltdm);
|
|
|
|
if (!target_uvdc) {
|
|
|
|
pr_err("%s: unable to find current voltage for vdd_%s\n",
|
|
|
|
__func__, voltdm->name);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
omap_voltage_scale_vdd(voltdm, target_uvdc);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* omap_voltage_get_volttable() - API to get the voltage table associated with a
|
|
|
|
* particular voltage domain.
|
|
|
|
* @voltdm: pointer to the VDD for which the voltage table is required
|
|
|
|
* @volt_data: the voltage table for the particular vdd which is to be
|
|
|
|
* populated by this API
|
|
|
|
*
|
|
|
|
* This API populates the voltage table associated with a VDD into the
|
|
|
|
* passed parameter pointer. Returns the count of distinct voltages
|
|
|
|
* supported by this vdd.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
void omap_voltage_get_volttable(struct voltagedomain *voltdm,
|
|
|
|
struct omap_volt_data **volt_data)
|
|
|
|
{
|
|
|
|
struct omap_vdd_info *vdd;
|
|
|
|
|
|
|
|
if (!voltdm || IS_ERR(voltdm)) {
|
|
|
|
pr_warning("%s: VDD specified does not exist!\n", __func__);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
|
|
|
|
|
|
|
|
*volt_data = vdd->volt_data;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* omap_voltage_get_voltdata() - API to get the voltage table entry for a
|
|
|
|
* particular voltage
|
|
|
|
* @voltdm: pointer to the VDD whose voltage table has to be searched
|
|
|
|
* @volt: the voltage to be searched in the voltage table
|
|
|
|
*
|
|
|
|
* This API searches through the voltage table for the required voltage
|
|
|
|
* domain and tries to find a matching entry for the passed voltage volt.
|
|
|
|
* If a matching entry is found volt_data is populated with that entry.
|
|
|
|
* This API searches only through the non-compensated voltages int the
|
|
|
|
* voltage table.
|
|
|
|
* Returns pointer to the voltage table entry corresponding to volt on
|
|
|
|
* sucess. Returns -ENODATA if no voltage table exisits for the passed voltage
|
|
|
|
* domain or if there is no matching entry.
|
|
|
|
*/
|
|
|
|
struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm,
|
|
|
|
unsigned long volt)
|
|
|
|
{
|
|
|
|
struct omap_vdd_info *vdd;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (!voltdm || IS_ERR(voltdm)) {
|
|
|
|
pr_warning("%s: VDD specified does not exist!\n", __func__);
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
}
|
|
|
|
|
|
|
|
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
|
|
|
|
|
|
|
|
if (!vdd->volt_data) {
|
|
|
|
pr_warning("%s: voltage table does not exist for vdd_%s\n",
|
|
|
|
__func__, voltdm->name);
|
|
|
|
return ERR_PTR(-ENODATA);
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; vdd->volt_data[i].volt_nominal != 0; i++) {
|
|
|
|
if (vdd->volt_data[i].volt_nominal == volt)
|
|
|
|
return &vdd->volt_data[i];
|
|
|
|
}
|
|
|
|
|
|
|
|
pr_notice("%s: Unable to match the current voltage with the voltage"
|
|
|
|
"table for vdd_%s\n", __func__, voltdm->name);
|
|
|
|
|
|
|
|
return ERR_PTR(-ENODATA);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* omap_voltage_register_pmic() - API to register PMIC specific data
|
|
|
|
* @voltdm: pointer to the VDD for which the PMIC specific data is
|
|
|
|
* to be registered
|
|
|
|
* @pmic_info: the structure containing pmic info
|
|
|
|
*
|
|
|
|
* This API is to be called by the SOC/PMIC file to specify the
|
|
|
|
* pmic specific info as present in omap_volt_pmic_info structure.
|
|
|
|
*/
|
|
|
|
int omap_voltage_register_pmic(struct voltagedomain *voltdm,
|
|
|
|
struct omap_volt_pmic_info *pmic_info)
|
|
|
|
{
|
|
|
|
struct omap_vdd_info *vdd;
|
|
|
|
|
|
|
|
if (!voltdm || IS_ERR(voltdm)) {
|
|
|
|
pr_warning("%s: VDD specified does not exist!\n", __func__);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
|
|
|
|
|
|
|
|
vdd->pmic_info = pmic_info;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* omap_voltage_get_dbgdir() - API to get pointer to the debugfs directory
|
|
|
|
* corresponding to a voltage domain.
|
|
|
|
*
|
|
|
|
* @voltdm: pointer to the VDD whose debug directory is required.
|
|
|
|
*
|
|
|
|
* This API returns pointer to the debugfs directory corresponding
|
|
|
|
* to the voltage domain. Should be used by drivers requiring to
|
|
|
|
* add any debug entry for a particular voltage domain. Returns NULL
|
|
|
|
* in case of error.
|
|
|
|
*/
|
|
|
|
struct dentry *omap_voltage_get_dbgdir(struct voltagedomain *voltdm)
|
|
|
|
{
|
|
|
|
struct omap_vdd_info *vdd;
|
|
|
|
|
|
|
|
if (!voltdm || IS_ERR(voltdm)) {
|
|
|
|
pr_warning("%s: VDD specified does not exist!\n", __func__);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
|
|
|
|
|
|
|
|
return vdd->debug_dir;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* omap_change_voltscale_method() - API to change the voltage scaling method.
|
|
|
|
* @voltdm: pointer to the VDD whose voltage scaling method
|
|
|
|
* has to be changed.
|
|
|
|
* @voltscale_method: the method to be used for voltage scaling.
|
|
|
|
*
|
|
|
|
* This API can be used by the board files to change the method of voltage
|
|
|
|
* scaling between vpforceupdate and vcbypass. The parameter values are
|
|
|
|
* defined in voltage.h
|
|
|
|
*/
|
|
|
|
void omap_change_voltscale_method(struct voltagedomain *voltdm,
|
|
|
|
int voltscale_method)
|
|
|
|
{
|
|
|
|
struct omap_vdd_info *vdd;
|
|
|
|
|
|
|
|
if (!voltdm || IS_ERR(voltdm)) {
|
|
|
|
pr_warning("%s: VDD specified does not exist!\n", __func__);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
|
|
|
|
|
|
|
|
switch (voltscale_method) {
|
|
|
|
case VOLTSCALE_VPFORCEUPDATE:
|
|
|
|
vdd->volt_scale = vp_forceupdate_scale_voltage;
|
|
|
|
return;
|
|
|
|
case VOLTSCALE_VCBYPASS:
|
|
|
|
vdd->volt_scale = vc_bypass_scale_voltage;
|
|
|
|
return;
|
|
|
|
default:
|
|
|
|
pr_warning("%s: Trying to change the method of voltage scaling"
|
|
|
|
"to an unsupported one!\n", __func__);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* omap_voltage_domain_lookup() - API to get the voltage domain pointer
|
|
|
|
* @name: Name of the voltage domain
|
|
|
|
*
|
|
|
|
* This API looks up in the global vdd_info struct for the
|
|
|
|
* existence of voltage domain <name>. If it exists, the API returns
|
|
|
|
* a pointer to the voltage domain structure corresponding to the
|
|
|
|
* VDD<name>. Else retuns error pointer.
|
|
|
|
*/
|
|
|
|
struct voltagedomain *omap_voltage_domain_lookup(char *name)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (!vdd_info) {
|
|
|
|
pr_err("%s: Voltage driver init not yet happened.Faulting!\n",
|
|
|
|
__func__);
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!name) {
|
|
|
|
pr_err("%s: No name to get the votage domain!\n", __func__);
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < nr_scalable_vdd; i++) {
|
|
|
|
if (!(strcmp(name, vdd_info[i].voltdm.name)))
|
|
|
|
return &vdd_info[i].voltdm;
|
|
|
|
}
|
|
|
|
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* omap_voltage_late_init() - Init the various voltage parameters
|
|
|
|
*
|
|
|
|
* This API is to be called in the later stages of the
|
|
|
|
* system boot to init the voltage controller and
|
|
|
|
* voltage processors.
|
|
|
|
*/
|
|
|
|
int __init omap_voltage_late_init(void)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (!vdd_info) {
|
|
|
|
pr_err("%s: Voltage driver support not added\n",
|
|
|
|
__func__);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
voltage_dir = debugfs_create_dir("voltage", NULL);
|
|
|
|
if (IS_ERR(voltage_dir))
|
|
|
|
pr_err("%s: Unable to create voltage debugfs main dir\n",
|
|
|
|
__func__);
|
|
|
|
for (i = 0; i < nr_scalable_vdd; i++) {
|
|
|
|
if (vdd_data_configure(&vdd_info[i]))
|
|
|
|
continue;
|
|
|
|
vc_init(&vdd_info[i]);
|
|
|
|
vp_init(&vdd_info[i]);
|
|
|
|
vdd_debugfs_init(&vdd_info[i]);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* omap_voltage_early_init()- Volatage driver early init
|
|
|
|
*/
|
|
|
|
static int __init omap_voltage_early_init(void)
|
|
|
|
{
|
|
|
|
if (cpu_is_omap34xx()) {
|
|
|
|
vdd_info = omap3_vdd_info;
|
|
|
|
nr_scalable_vdd = OMAP3_NR_SCALABLE_VDD;
|
|
|
|
vc_init = omap3_vc_init;
|
|
|
|
vdd_data_configure = omap3_vdd_data_configure;
|
2010-12-10 18:45:23 +01:00
|
|
|
} else if (cpu_is_omap44xx()) {
|
|
|
|
vdd_info = omap4_vdd_info;
|
|
|
|
nr_scalable_vdd = OMAP4_NR_SCALABLE_VDD;
|
|
|
|
vc_init = omap4_vc_init;
|
|
|
|
vdd_data_configure = omap4_vdd_data_configure;
|
2010-05-29 18:32:21 +02:00
|
|
|
} else {
|
|
|
|
pr_warning("%s: voltage driver support not added\n", __func__);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
core_initcall(omap_voltage_early_init);
|