arch/arm/mach-omap2/vp.h

   1 /*
   2  * OMAP3/4 Voltage Processor (VP) structure and macro definitions
   3  *
   4  * Copyright (C) 2007, 2010 Texas Instruments, Inc.
   5  * Rajendra Nayak <rnayak@ti.com>
   6  * Lesly A M <x0080970@ti.com>
   7  * Thara Gopinath <thara@ti.com>
   8  *
   9  * Copyright (C) 2008, 2011 Nokia Corporation
  10  * Kalle Jokiniemi
  11  * Paul Walmsley
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License version
  15  * 2 as published by the Free Software Foundation.
  16  */
  17 #ifndef __ARCH_ARM_MACH_OMAP2_VP_H
  18 #define __ARCH_ARM_MACH_OMAP2_VP_H
  19
  20 #include <linux/kernel.h>
  21
  22 struct voltagedomain;
  23
  24 /*
  25  * Voltage Processor (VP) identifiers
  26  */
  27 #define OMAP3_VP_VDD_MPU_ID 0
  28 #define OMAP3_VP_VDD_CORE_ID 1
  29 #define OMAP4_VP_VDD_CORE_ID 0
  30 #define OMAP4_VP_VDD_IVA_ID 1
  31 #define OMAP4_VP_VDD_MPU_ID 2
  32
  33 /* XXX document */
  34 #define VP_IDLE_TIMEOUT         200
  35 #define VP_TRANXDONE_TIMEOUT    300
  36
  37 /**
  38  * struct omap_vp_ops - per-VP operations
  39  * @check_txdone: check for VP transaction done
  40  * @clear_txdone: clear VP transaction done status
  41  */
  42 struct omap_vp_ops {
  43         u32 (*check_txdone)(u8 vp_id);
  44         void (*clear_txdone)(u8 vp_id);
  45 };
  46
  47 /**
  48  * struct omap_vp_common - register data common to all VDDs
  49  * @vpconfig_erroroffset_mask: ERROROFFSET bitmask in the PRM_VP*_CONFIG reg
  50  * @vpconfig_errorgain_mask: ERRORGAIN bitmask in the PRM_VP*_CONFIG reg
  51  * @vpconfig_initvoltage_mask: INITVOLTAGE bitmask in the PRM_VP*_CONFIG reg
  52  * @vpconfig_timeouten: TIMEOUT bitmask in the PRM_VP*_CONFIG reg
  53  * @vpconfig_initvdd: INITVDD bitmask in the PRM_VP*_CONFIG reg
  54  * @vpconfig_forceupdate: FORCEUPDATE bitmask in the PRM_VP*_CONFIG reg
  55  * @vpconfig_vpenable: VPENABLE bitmask in the PRM_VP*_CONFIG reg
  56  * @vpconfig_erroroffset_shift: ERROROFFSET field shift in PRM_VP*_CONFIG reg
  57  * @vpconfig_errorgain_shift: ERRORGAIN field shift in PRM_VP*_CONFIG reg
  58  * @vpconfig_initvoltage_shift: INITVOLTAGE field shift in PRM_VP*_CONFIG reg
  59  * @vstepmin_stepmin_shift: VSTEPMIN field shift in the PRM_VP*_VSTEPMIN reg
  60  * @vstepmin_smpswaittimemin_shift: SMPSWAITTIMEMIN field shift in PRM_VP*_VSTEPMIN reg
  61  * @vstepmax_stepmax_shift: VSTEPMAX field shift in the PRM_VP*_VSTEPMAX reg
  62  * @vstepmax_smpswaittimemax_shift: SMPSWAITTIMEMAX field shift in PRM_VP*_VSTEPMAX reg
  63  * @vlimitto_vddmin_shift: VDDMIN field shift in PRM_VP*_VLIMITTO reg
  64  * @vlimitto_vddmax_shift: VDDMAX field shift in PRM_VP*_VLIMITTO reg
  65  * @vlimitto_timeout_shift: TIMEOUT field shift in PRM_VP*_VLIMITTO reg
  66  * @vpvoltage_mask: VPVOLTAGE field mask in PRM_VP*_VOLTAGE reg
  67  */
  68 struct omap_vp_common {
  69         u32 vpconfig_erroroffset_mask;
  70         u32 vpconfig_errorgain_mask;
  71         u32 vpconfig_initvoltage_mask;
  72         u8 vpconfig_timeouten;
  73         u8 vpconfig_initvdd;
  74         u8 vpconfig_forceupdate;
  75         u8 vpconfig_vpenable;
  76         u8 vstepmin_stepmin_shift;
  77         u8 vstepmin_smpswaittimemin_shift;
  78         u8 vstepmax_stepmax_shift;
  79         u8 vstepmax_smpswaittimemax_shift;
  80         u8 vlimitto_vddmin_shift;
  81         u8 vlimitto_vddmax_shift;
  82         u8 vlimitto_timeout_shift;
  83         u8 vpvoltage_mask;
  84
  85         const struct omap_vp_ops *ops;
  86 };
  87
  88 /**
  89  * struct omap_vp_instance - VP register offsets (per-VDD)
  90  * @common: pointer to struct omap_vp_common * for this SoC
  91  * @vpconfig: PRM_VP*_CONFIG reg offset from PRM start
  92  * @vstepmin: PRM_VP*_VSTEPMIN reg offset from PRM start
  93  * @vlimitto: PRM_VP*_VLIMITTO reg offset from PRM start
  94  * @vstatus: PRM_VP*_VSTATUS reg offset from PRM start
  95  * @voltage: PRM_VP*_VOLTAGE reg offset from PRM start
  96  * @id: Unique identifier for VP instance.
  97  * @enabled: flag to keep track of whether vp is enabled or not
  98  *
  99  * XXX vp_common is probably not needed since it is per-SoC
 100  */
 101 struct omap_vp_instance {
 102         const struct omap_vp_common *common;
 103         u8 vpconfig;
 104         u8 vstepmin;
 105         u8 vstepmax;
 106         u8 vlimitto;
 107         u8 vstatus;
 108         u8 voltage;
 109         u8 id;
 110         bool enabled;
 111 };
 112
 113 extern struct omap_vp_instance omap3_vp_mpu;
 114 extern struct omap_vp_instance omap3_vp_core;
 115
 116 extern struct omap_vp_instance omap4_vp_mpu;
 117 extern struct omap_vp_instance omap4_vp_iva;
 118 extern struct omap_vp_instance omap4_vp_core;
 119
 120 void omap_vp_init(struct voltagedomain *voltdm);
 121 void omap_vp_enable(struct voltagedomain *voltdm);
 122 void omap_vp_disable(struct voltagedomain *voltdm);
 123 int omap_vp_forceupdate_scale(struct voltagedomain *voltdm,
 124                               unsigned long target_volt);
 125 int omap_vp_update_errorgain(struct voltagedomain *voltdm,
 126                              unsigned long target_volt);
 127
 128 #endif