arch/arm/mach-omap2/omap_twl.c

   1 /**
   2  * OMAP and TWL PMIC specific intializations.
   3  *
   4  * Copyright (C) 2010 Texas Instruments Incorporated.
   5  * Thara Gopinath
   6  * Copyright (C) 2009 Texas Instruments Incorporated.
   7  * Nishanth Menon
   8  * Copyright (C) 2009 Nokia Corporation
   9  * Paul Walmsley
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/err.h>
  17 #include <linux/io.h>
  18 #include <linux/kernel.h>
  19 #include <linux/i2c/twl.h>
  20
  21 #include <plat/voltage.h>
  22
  23 #define OMAP3_SRI2C_SLAVE_ADDR          0x12
  24 #define OMAP3_VDD_MPU_SR_CONTROL_REG    0x00
  25 #define OMAP3_VDD_CORE_SR_CONTROL_REG   0x01
  26 #define OMAP3_VP_CONFIG_ERROROFFSET     0x00
  27 #define OMAP3_VP_VSTEPMIN_VSTEPMIN      0x1
  28 #define OMAP3_VP_VSTEPMAX_VSTEPMAX      0x04
  29 #define OMAP3_VP_VLIMITTO_TIMEOUT_US    200
  30
  31 #define OMAP3430_VP1_VLIMITTO_VDDMIN    0x14
  32 #define OMAP3430_VP1_VLIMITTO_VDDMAX    0x42
  33 #define OMAP3430_VP2_VLIMITTO_VDDMIN    0x18
  34 #define OMAP3430_VP2_VLIMITTO_VDDMAX    0x2c
  35
  36 #define OMAP3630_VP1_VLIMITTO_VDDMIN    0x18
  37 #define OMAP3630_VP1_VLIMITTO_VDDMAX    0x3c
  38 #define OMAP3630_VP2_VLIMITTO_VDDMIN    0x18
  39 #define OMAP3630_VP2_VLIMITTO_VDDMAX    0x30
  40
  41 #define OMAP4_SRI2C_SLAVE_ADDR          0x12
  42 #define OMAP4_VDD_MPU_SR_VOLT_REG       0x55
  43 #define OMAP4_VDD_IVA_SR_VOLT_REG       0x5B
  44 #define OMAP4_VDD_CORE_SR_VOLT_REG      0x61
  45
  46 #define OMAP4_VP_CONFIG_ERROROFFSET     0x00
  47 #define OMAP4_VP_VSTEPMIN_VSTEPMIN      0x01
  48 #define OMAP4_VP_VSTEPMAX_VSTEPMAX      0x04
  49 #define OMAP4_VP_VLIMITTO_TIMEOUT_US    200
  50
  51 #define OMAP4_VP_MPU_VLIMITTO_VDDMIN    0xA
  52 #define OMAP4_VP_MPU_VLIMITTO_VDDMAX    0x39
  53 #define OMAP4_VP_IVA_VLIMITTO_VDDMIN    0xA
  54 #define OMAP4_VP_IVA_VLIMITTO_VDDMAX    0x2D
  55 #define OMAP4_VP_CORE_VLIMITTO_VDDMIN   0xA
  56 #define OMAP4_VP_CORE_VLIMITTO_VDDMAX   0x28
  57
  58 static bool is_offset_valid;
  59 static u8 smps_offset;
  60
  61 #define REG_SMPS_OFFSET         0xE0
  62
  63 unsigned long twl4030_vsel_to_uv(const u8 vsel)
  64 {
  65         return (((vsel * 125) + 6000)) * 100;
  66 }
  67
  68 u8 twl4030_uv_to_vsel(unsigned long uv)
  69 {
  70         return DIV_ROUND_UP(uv - 600000, 12500);
  71 }
  72
  73 unsigned long twl6030_vsel_to_uv(const u8 vsel)
  74 {
  75         /*
  76          * In TWL6030 depending on the value of SMPS_OFFSET
  77          * efuse register the voltage range supported in
  78          * standard mode can be either between 0.6V - 1.3V or
  79          * 0.7V - 1.4V. In TWL6030 ES1.0 SMPS_OFFSET efuse
  80          * is programmed to all 0's where as starting from
  81          * TWL6030 ES1.1 the efuse is programmed to 1
  82          */
  83         if (!is_offset_valid) {
  84                 twl_i2c_read_u8(TWL6030_MODULE_ID0, &smps_offset,
  85                                 REG_SMPS_OFFSET);
  86                 is_offset_valid = true;
  87         }
  88
  89         /*
  90          * There is no specific formula for voltage to vsel
  91          * conversion above 1.3V. There are special hardcoded
  92          * values for voltages above 1.3V. Currently we are
  93          * hardcoding only for 1.35 V which is used for 1GH OPP for
  94          * OMAP4430.
  95          */
  96         if (vsel == 0x3A)
  97                 return 1350000;
  98
  99         if (smps_offset & 0x8)
 100                 return ((((vsel - 1) * 125) + 7000)) * 100;
 101         else
 102                 return ((((vsel - 1) * 125) + 6000)) * 100;
 103 }
 104
 105 u8 twl6030_uv_to_vsel(unsigned long uv)
 106 {
 107         /*
 108          * In TWL6030 depending on the value of SMPS_OFFSET
 109          * efuse register the voltage range supported in
 110          * standard mode can be either between 0.6V - 1.3V or
 111          * 0.7V - 1.4V. In TWL6030 ES1.0 SMPS_OFFSET efuse
 112          * is programmed to all 0's where as starting from
 113          * TWL6030 ES1.1 the efuse is programmed to 1
 114          */
 115         if (!is_offset_valid) {
 116                 twl_i2c_read_u8(TWL6030_MODULE_ID0, &smps_offset,
 117                                 REG_SMPS_OFFSET);
 118                 is_offset_valid = true;
 119         }
 120
 121         /*
 122          * There is no specific formula for voltage to vsel
 123          * conversion above 1.3V. There are special hardcoded
 124          * values for voltages above 1.3V. Currently we are
 125          * hardcoding only for 1.35 V which is used for 1GH OPP for
 126          * OMAP4430.
 127          */
 128         if (uv == 1350000)
 129                 return 0x3A;
 130
 131         if (smps_offset & 0x8)
 132                 return DIV_ROUND_UP(uv - 700000, 12500) + 1;
 133         else
 134                 return DIV_ROUND_UP(uv - 600000, 12500) + 1;
 135 }
 136
 137 static struct omap_volt_pmic_info omap3_mpu_volt_info = {
 138         .slew_rate              = 4000,
 139         .step_size              = 12500,
 140         .on_volt                = 1200000,
 141         .onlp_volt              = 1000000,
 142         .ret_volt               = 975000,
 143         .off_volt               = 600000,
 144         .volt_setup_time        = 0xfff,
 145         .vp_erroroffset         = OMAP3_VP_CONFIG_ERROROFFSET,
 146         .vp_vstepmin            = OMAP3_VP_VSTEPMIN_VSTEPMIN,
 147         .vp_vstepmax            = OMAP3_VP_VSTEPMAX_VSTEPMAX,
 148         .vp_vddmin              = OMAP3430_VP1_VLIMITTO_VDDMIN,
 149         .vp_vddmax              = OMAP3430_VP1_VLIMITTO_VDDMAX,
 150         .vp_timeout_us          = OMAP3_VP_VLIMITTO_TIMEOUT_US,
 151         .i2c_slave_addr         = OMAP3_SRI2C_SLAVE_ADDR,
 152         .pmic_reg               = OMAP3_VDD_MPU_SR_CONTROL_REG,
 153         .vsel_to_uv             = twl4030_vsel_to_uv,
 154         .uv_to_vsel             = twl4030_uv_to_vsel,
 155 };
 156
 157 static struct omap_volt_pmic_info omap3_core_volt_info = {
 158         .slew_rate              = 4000,
 159         .step_size              = 12500,
 160         .on_volt                = 1200000,
 161         .onlp_volt              = 1000000,
 162         .ret_volt               = 975000,
 163         .off_volt               = 600000,
 164         .volt_setup_time        = 0xfff,
 165         .vp_erroroffset         = OMAP3_VP_CONFIG_ERROROFFSET,
 166         .vp_vstepmin            = OMAP3_VP_VSTEPMIN_VSTEPMIN,
 167         .vp_vstepmax            = OMAP3_VP_VSTEPMAX_VSTEPMAX,
 168         .vp_vddmin              = OMAP3430_VP2_VLIMITTO_VDDMIN,
 169         .vp_vddmax              = OMAP3430_VP2_VLIMITTO_VDDMAX,
 170         .vp_timeout_us          = OMAP3_VP_VLIMITTO_TIMEOUT_US,
 171         .i2c_slave_addr         = OMAP3_SRI2C_SLAVE_ADDR,
 172         .pmic_reg               = OMAP3_VDD_CORE_SR_CONTROL_REG,
 173         .vsel_to_uv             = twl4030_vsel_to_uv,
 174         .uv_to_vsel             = twl4030_uv_to_vsel,
 175 };
 176
 177 static struct omap_volt_pmic_info omap4_mpu_volt_info = {
 178         .slew_rate              = 4000,
 179         .step_size              = 12500,
 180         .on_volt                = 1350000,
 181         .onlp_volt              = 1350000,
 182         .ret_volt               = 837500,
 183         .off_volt               = 600000,
 184         .volt_setup_time        = 0,
 185         .vp_erroroffset         = OMAP4_VP_CONFIG_ERROROFFSET,
 186         .vp_vstepmin            = OMAP4_VP_VSTEPMIN_VSTEPMIN,
 187         .vp_vstepmax            = OMAP4_VP_VSTEPMAX_VSTEPMAX,
 188         .vp_vddmin              = OMAP4_VP_MPU_VLIMITTO_VDDMIN,
 189         .vp_vddmax              = OMAP4_VP_MPU_VLIMITTO_VDDMAX,
 190         .vp_timeout_us          = OMAP4_VP_VLIMITTO_TIMEOUT_US,
 191         .i2c_slave_addr         = OMAP4_SRI2C_SLAVE_ADDR,
 192         .pmic_reg               = OMAP4_VDD_MPU_SR_VOLT_REG,
 193         .vsel_to_uv             = twl6030_vsel_to_uv,
 194         .uv_to_vsel             = twl6030_uv_to_vsel,
 195 };
 196
 197 static struct omap_volt_pmic_info omap4_iva_volt_info = {
 198         .slew_rate              = 4000,
 199         .step_size              = 12500,
 200         .on_volt                = 1100000,
 201         .onlp_volt              = 1100000,
 202         .ret_volt               = 837500,
 203         .off_volt               = 600000,
 204         .volt_setup_time        = 0,
 205         .vp_erroroffset         = OMAP4_VP_CONFIG_ERROROFFSET,
 206         .vp_vstepmin            = OMAP4_VP_VSTEPMIN_VSTEPMIN,
 207         .vp_vstepmax            = OMAP4_VP_VSTEPMAX_VSTEPMAX,
 208         .vp_vddmin              = OMAP4_VP_IVA_VLIMITTO_VDDMIN,
 209         .vp_vddmax              = OMAP4_VP_IVA_VLIMITTO_VDDMAX,
 210         .vp_timeout_us          = OMAP4_VP_VLIMITTO_TIMEOUT_US,
 211         .i2c_slave_addr         = OMAP4_SRI2C_SLAVE_ADDR,
 212         .pmic_reg               = OMAP4_VDD_IVA_SR_VOLT_REG,
 213         .vsel_to_uv             = twl6030_vsel_to_uv,
 214         .uv_to_vsel             = twl6030_uv_to_vsel,
 215 };
 216
 217 static struct omap_volt_pmic_info omap4_core_volt_info = {
 218         .slew_rate              = 4000,
 219         .step_size              = 12500,
 220         .on_volt                = 1100000,
 221         .onlp_volt              = 1100000,
 222         .ret_volt               = 837500,
 223         .off_volt               = 600000,
 224         .volt_setup_time        = 0,
 225         .vp_erroroffset         = OMAP4_VP_CONFIG_ERROROFFSET,
 226         .vp_vstepmin            = OMAP4_VP_VSTEPMIN_VSTEPMIN,
 227         .vp_vstepmax            = OMAP4_VP_VSTEPMAX_VSTEPMAX,
 228         .vp_vddmin              = OMAP4_VP_CORE_VLIMITTO_VDDMIN,
 229         .vp_vddmax              = OMAP4_VP_CORE_VLIMITTO_VDDMAX,
 230         .vp_timeout_us          = OMAP4_VP_VLIMITTO_TIMEOUT_US,
 231         .i2c_slave_addr         = OMAP4_SRI2C_SLAVE_ADDR,
 232         .pmic_reg               = OMAP4_VDD_CORE_SR_VOLT_REG,
 233         .vsel_to_uv             = twl6030_vsel_to_uv,
 234         .uv_to_vsel             = twl6030_uv_to_vsel,
 235 };
 236
 237 int __init omap4_twl_init(void)
 238 {
 239         struct voltagedomain *voltdm;
 240
 241         if (!cpu_is_omap44xx())
 242                 return -ENODEV;
 243
 244         voltdm = omap_voltage_domain_lookup("mpu");
 245         omap_voltage_register_pmic(voltdm, &omap4_mpu_volt_info);
 246
 247         voltdm = omap_voltage_domain_lookup("iva");
 248         omap_voltage_register_pmic(voltdm, &omap4_iva_volt_info);
 249
 250         voltdm = omap_voltage_domain_lookup("core");
 251         omap_voltage_register_pmic(voltdm, &omap4_core_volt_info);
 252
 253         return 0;
 254 }
 255
 256 int __init omap3_twl_init(void)
 257 {
 258         struct voltagedomain *voltdm;
 259
 260         if (!cpu_is_omap34xx())
 261                 return -ENODEV;
 262
 263         if (cpu_is_omap3630()) {
 264                 omap3_mpu_volt_info.vp_vddmin = OMAP3630_VP1_VLIMITTO_VDDMIN;
 265                 omap3_mpu_volt_info.vp_vddmax = OMAP3630_VP1_VLIMITTO_VDDMAX;
 266                 omap3_core_volt_info.vp_vddmin = OMAP3630_VP2_VLIMITTO_VDDMIN;
 267                 omap3_core_volt_info.vp_vddmax = OMAP3630_VP2_VLIMITTO_VDDMAX;
 268         }
 269
 270         voltdm = omap_voltage_domain_lookup("mpu");
 271         omap_voltage_register_pmic(voltdm, &omap3_mpu_volt_info);
 272
 273         voltdm = omap_voltage_domain_lookup("core");
 274         omap_voltage_register_pmic(voltdm, &omap3_core_volt_info);
 275
 276         return 0;
 277 }