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 129