arch/arm/mach-omap2/omap_twl.c

   1 /**
   2  * OMAP and TWL PMIC specific initializations.
   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/mfd/twl.h>
  20
  21 #include "soc.h"
  22 #include "voltage.h"
  23
  24 #include "pm.h"
  25
  26 #define OMAP3_SRI2C_SLAVE_ADDR          0x12
  27 #define OMAP3_VDD_MPU_SR_CONTROL_REG    0x00
  28 #define OMAP3_VDD_CORE_SR_CONTROL_REG   0x01
  29 #define OMAP3_VP_CONFIG_ERROROFFSET     0x00
  30 #define OMAP3_VP_VSTEPMIN_VSTEPMIN      0x1
  31 #define OMAP3_VP_VSTEPMAX_VSTEPMAX      0x04
  32 #define OMAP3_VP_VLIMITTO_TIMEOUT_US    200
  33
  34 #define OMAP4_SRI2C_SLAVE_ADDR          0x12
  35 #define OMAP4_VDD_MPU_SR_VOLT_REG       0x55
  36 #define OMAP4_VDD_MPU_SR_CMD_REG        0x56
  37 #define OMAP4_VDD_IVA_SR_VOLT_REG       0x5B
  38 #define OMAP4_VDD_IVA_SR_CMD_REG        0x5C
  39 #define OMAP4_VDD_CORE_SR_VOLT_REG      0x61
  40 #define OMAP4_VDD_CORE_SR_CMD_REG       0x62
  41
  42 #define OMAP4_VP_CONFIG_ERROROFFSET     0x00
  43 #define OMAP4_VP_VSTEPMIN_VSTEPMIN      0x01
  44 #define OMAP4_VP_VSTEPMAX_VSTEPMAX      0x04
  45 #define OMAP4_VP_VLIMITTO_TIMEOUT_US    200
  46
  47 static bool is_offset_valid;
  48 static u8 smps_offset;
  49
  50 #define REG_SMPS_OFFSET         0xE0
  51
  52 static unsigned long twl4030_vsel_to_uv(const u8 vsel)
  53 {
  54         return (((vsel * 125) + 6000)) * 100;
  55 }
  56
  57 static u8 twl4030_uv_to_vsel(unsigned long uv)
  58 {
  59         return DIV_ROUND_UP(uv - 600000, 12500);
  60 }
  61
  62 static unsigned long twl6030_vsel_to_uv(const u8 vsel)
  63 {
  64         /*
  65          * In TWL6030 depending on the value of SMPS_OFFSET
  66          * efuse register the voltage range supported in
  67          * standard mode can be either between 0.6V - 1.3V or
  68          * 0.7V - 1.4V. In TWL6030 ES1.0 SMPS_OFFSET efuse
  69          * is programmed to all 0's where as starting from
  70          * TWL6030 ES1.1 the efuse is programmed to 1
  71          */
  72         if (!is_offset_valid) {
  73                 twl_i2c_read_u8(TWL6030_MODULE_ID0, &smps_offset,
  74                                 REG_SMPS_OFFSET);
  75                 is_offset_valid = true;
  76         }
  77
  78         if (!vsel)
  79                 return 0;
  80         /*
  81          * There is no specific formula for voltage to vsel
  82          * conversion above 1.3V. There are special hardcoded
  83          * values for voltages above 1.3V. Currently we are
  84          * hardcoding only for 1.35 V which is used for 1GH OPP for
  85          * OMAP4430.
  86          */
  87         if (vsel == 0x3A)
  88                 return 1350000;
  89
  90         if (smps_offset & 0x8)
  91                 return ((((vsel - 1) * 1266) + 70900)) * 10;
  92         else
  93                 return ((((vsel - 1) * 1266) + 60770)) * 10;
  94 }
  95
  96 static u8 twl6030_uv_to_vsel(unsigned long uv)
  97 {
  98         /*
  99          * In TWL6030 depending on the value of SMPS_OFFSET
 100          * efuse register the voltage range supported in
 101          * standard mode can be either between 0.6V - 1.3V or
 102          * 0.7V - 1.4V. In TWL6030 ES1.0 SMPS_OFFSET efuse
 103          * is programmed to all 0's where as starting from
 104          * TWL6030 ES1.1 the efuse is programmed to 1
 105          */
 106         if (!is_offset_valid) {
 107                 twl_i2c_read_u8(TWL6030_MODULE_ID0, &smps_offset,
 108                                 REG_SMPS_OFFSET);
 109                 is_offset_valid = true;
 110         }
 111
 112         if (!uv)
 113                 return 0x00;
 114         /*
 115          * There is no specific formula for voltage to vsel
 116          * conversion above 1.3V. There are special hardcoded
 117          * values for voltages above 1.3V. Currently we are
 118          * hardcoding only for 1.35 V which is used for 1GH OPP for
 119          * OMAP4430.
 120          */
 121         if (uv > twl6030_vsel_to_uv(0x39)) {
 122                 if (uv == 1350000)
 123                         return 0x3A;
 124                 pr_err("%s:OUT OF RANGE! non mapped vsel for %ld Vs max %ld\n",
 125                         __func__, uv, twl6030_vsel_to_uv(0x39));
 126                 return 0x3A;
 127         }
 128
 129         if (smps_offset & 0x8)
 130                 return DIV_ROUND_UP(uv - 709000, 12660) + 1;
 131         else
 132                 return DIV_ROUND_UP(uv - 607700, 12660) + 1;
 133 }
 134
 135 static struct omap_voltdm_pmic omap3_mpu_pmic = {
 136         .slew_rate              = 4000,
 137         .step_size              = 12500,
 138         .vp_erroroffset         = OMAP3_VP_CONFIG_ERROROFFSET,
 139         .vp_vstepmin            = OMAP3_VP_VSTEPMIN_VSTEPMIN,
 140         .vp_vstepmax            = OMAP3_VP_VSTEPMAX_VSTEPMAX,
 141         .vddmin                 = 600000,
 142         .vddmax                 = 1450000,
 143         .vp_timeout_us          = OMAP3_VP_VLIMITTO_TIMEOUT_US,
 144         .i2c_slave_addr         = OMAP3_SRI2C_SLAVE_ADDR,
 145         .volt_reg_addr          = OMAP3_VDD_MPU_SR_CONTROL_REG,
 146         .i2c_high_speed         = true,
 147         .vsel_to_uv             = twl4030_vsel_to_uv,
 148         .uv_to_vsel             = twl4030_uv_to_vsel,
 149 };
 150
 151 static struct omap_voltdm_pmic omap3_core_pmic = {
 152         .slew_rate              = 4000,
 153         .step_size              = 12500,
 154         .vp_erroroffset         = OMAP3_VP_CONFIG_ERROROFFSET,
 155         .vp_vstepmin            = OMAP3_VP_VSTEPMIN_VSTEPMIN,
 156         .vp_vstepmax            = OMAP3_VP_VSTEPMAX_VSTEPMAX,
 157         .vddmin                 = 600000,
 158         .vddmax                 = 1450000,
 159         .vp_timeout_us          = OMAP3_VP_VLIMITTO_TIMEOUT_US,
 160         .i2c_slave_addr         = OMAP3_SRI2C_SLAVE_ADDR,
 161         .volt_reg_addr          = OMAP3_VDD_CORE_SR_CONTROL_REG,
 162         .i2c_high_speed         = true,
 163         .vsel_to_uv             = twl4030_vsel_to_uv,
 164         .uv_to_vsel             = twl4030_uv_to_vsel,
 165 };
 166
 167 static struct omap_voltdm_pmic omap4_mpu_pmic = {
 168         .slew_rate              = 4000,
 169         .step_size              = 12660,
 170         .vp_erroroffset         = OMAP4_VP_CONFIG_ERROROFFSET,
 171         .vp_vstepmin            = OMAP4_VP_VSTEPMIN_VSTEPMIN,
 172         .vp_vstepmax            = OMAP4_VP_VSTEPMAX_VSTEPMAX,
 173         .vddmin                 = 0,
 174         .vddmax                 = 2100000,
 175         .vp_timeout_us          = OMAP4_VP_VLIMITTO_TIMEOUT_US,
 176         .i2c_slave_addr         = OMAP4_SRI2C_SLAVE_ADDR,
 177         .volt_reg_addr          = OMAP4_VDD_MPU_SR_VOLT_REG,
 178         .cmd_reg_addr           = OMAP4_VDD_MPU_SR_CMD_REG,
 179         .i2c_high_speed         = true,
 180         .i2c_pad_load           = 3,
 181         .vsel_to_uv             = twl6030_vsel_to_uv,
 182         .uv_to_vsel             = twl6030_uv_to_vsel,
 183 };
 184
 185 static struct omap_voltdm_pmic omap4_iva_pmic = {
 186         .slew_rate              = 4000,
 187         .step_size              = 12660,
 188         .vp_erroroffset         = OMAP4_VP_CONFIG_ERROROFFSET,
 189         .vp_vstepmin            = OMAP4_VP_VSTEPMIN_VSTEPMIN,
 190         .vp_vstepmax            = OMAP4_VP_VSTEPMAX_VSTEPMAX,
 191         .vddmin                 = 0,
 192         .vddmax                 = 2100000,
 193         .vp_timeout_us          = OMAP4_VP_VLIMITTO_TIMEOUT_US,
 194         .i2c_slave_addr         = OMAP4_SRI2C_SLAVE_ADDR,
 195         .volt_reg_addr          = OMAP4_VDD_IVA_SR_VOLT_REG,
 196         .cmd_reg_addr           = OMAP4_VDD_IVA_SR_CMD_REG,
 197         .i2c_high_speed         = true,
 198         .i2c_pad_load           = 3,
 199         .vsel_to_uv             = twl6030_vsel_to_uv,
 200         .uv_to_vsel             = twl6030_uv_to_vsel,
 201 };
 202
 203 static struct omap_voltdm_pmic omap4_core_pmic = {
 204         .slew_rate              = 4000,
 205         .step_size              = 12660,
 206         .vp_erroroffset         = OMAP4_VP_CONFIG_ERROROFFSET,
 207         .vp_vstepmin            = OMAP4_VP_VSTEPMIN_VSTEPMIN,
 208         .vp_vstepmax            = OMAP4_VP_VSTEPMAX_VSTEPMAX,
 209         .vddmin                 = 0,
 210         .vddmax                 = 2100000,
 211         .vp_timeout_us          = OMAP4_VP_VLIMITTO_TIMEOUT_US,
 212         .i2c_slave_addr         = OMAP4_SRI2C_SLAVE_ADDR,
 213         .volt_reg_addr          = OMAP4_VDD_CORE_SR_VOLT_REG,
 214         .cmd_reg_addr           = OMAP4_VDD_CORE_SR_CMD_REG,
 215         .i2c_high_speed         = true,
 216         .i2c_pad_load           = 3,
 217         .vsel_to_uv             = twl6030_vsel_to_uv,
 218         .uv_to_vsel             = twl6030_uv_to_vsel,
 219 };
 220
 221 int __init omap4_twl_init(void)
 222 {
 223         struct voltagedomain *voltdm;
 224
 225         if (!cpu_is_omap44xx())
 226                 return -ENODEV;
 227
 228         voltdm = voltdm_lookup("mpu");
 229         omap_voltage_register_pmic(voltdm, &omap4_mpu_pmic);
 230
 231         voltdm = voltdm_lookup("iva");
 232         omap_voltage_register_pmic(voltdm, &omap4_iva_pmic);
 233
 234         voltdm = voltdm_lookup("core");
 235         omap_voltage_register_pmic(voltdm, &omap4_core_pmic);
 236
 237         return 0;
 238 }
 239
 240 int __init omap3_twl_init(void)
 241 {
 242         struct voltagedomain *voltdm;
 243
 244         if (!cpu_is_omap34xx())
 245                 return -ENODEV;
 246
 247         voltdm = voltdm_lookup("mpu_iva");
 248         omap_voltage_register_pmic(voltdm, &omap3_mpu_pmic);
 249
 250         voltdm = voltdm_lookup("core");
 251         omap_voltage_register_pmic(voltdm, &omap3_core_pmic);
 252
 253         return 0;
 254 }