board/karo/tx6/rn5t618.c

   1 /*
   2  * Copyright (C) 2014 Lothar Waßmann <LW@KARO-electronics.de>
   3  *
   4  * See file CREDITS for list of people who contributed to this
   5  * project.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * version 2 as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  */
  17
  18 #include <common.h>
  19 #include <i2c.h>
  20
  21 #include "pmic.h"
  22
  23 #define RN5T618_NOETIMSET       0x11
  24 #define RN5T618_LDORTC1_SLOT    0x2a
  25 #define RN5T618_DC1CTL          0x2c
  26 #define RN5T618_DC1CTL2         0x2d
  27 #define RN5T618_DC2CTL          0x2e
  28 #define RN5T618_DC2CTL2         0x2f
  29 #define RN5T618_DC3CTL          0x30
  30 #define RN5T618_DC3CTL2         0x31
  31 #define RN5T618_DC1DAC          0x36 /* CORE */
  32 #define RN5T618_DC2DAC          0x37 /* SOC */
  33 #define RN5T618_DC3DAC          0x38 /* DDR */
  34 #define RN5T618_DC1DAC_SLP      0x3b
  35 #define RN5T618_DC2DAC_SLP      0x3c
  36 #define RN5T618_DC3DAC_SLP      0x3d
  37 #define RN5T618_LDOEN1          0x44
  38 #define RN5T618_LDODIS          0x46
  39 #define RN5T618_LDOEN2          0x48
  40 #define RN5T618_LDO3DAC         0x4e /* IO */
  41 #define RN5T618_LDORTCDAC       0x56 /* VBACKUP */
  42
  43 #define VDD_RTC_VAL             mV_to_regval_rtc(3000 * 10)
  44 #define VDD_HIGH_VAL            mV_to_regval3(3000 * 10)
  45 #define VDD_HIGH_VAL_LP         mV_to_regval3(3000 * 10)
  46 #define VDD_CORE_VAL            mV_to_regval(1425 * 10)
  47 #define VDD_CORE_VAL_LP         mV_to_regval(900 * 10)
  48 #define VDD_SOC_VAL             mV_to_regval(1425 * 10)
  49 #define VDD_SOC_VAL_LP          mV_to_regval(900 * 10)
  50 #define VDD_DDR_VAL             mV_to_regval(1500 * 10)
  51 #define VDD_DDR_VAL_LP          mV_to_regval(1500 * 10)
  52
  53 /* calculate voltages in 10mV */
  54 /* DCDC1-3 */
  55 #define mV_to_regval(mV)        DIV_ROUND(((((mV) < 6000) ? 6000 : (mV)) - 6000), 125)
  56 #define regval_to_mV(v)         (((v) * 125 + 6000))
  57
  58 /* LDO1-2 */
  59 #define mV_to_regval2(mV)       DIV_ROUND(((((mV) < 9000) ? 9000 : (mV)) - 9000), 250)
  60 #define regval2_to_mV(v)        (((v) * 250 + 9000))
  61
  62 /* LDO3 */
  63 #define mV_to_regval3(mV)       DIV_ROUND(((((mV) < 6000) ? 6000 : (mV)) - 6000), 250)
  64 #define regval3_to_mV(v)        (((v) * 250 + 6000))
  65
  66 /* LDORTC */
  67 #define mV_to_regval_rtc(mV)    DIV_ROUND(((((mV) < 17000) ? 17000 : (mV)) - 17000), 250)
  68 #define regval_rtc_to_mV(v)     (((v) * 250 + 17000))
  69
  70 static struct rn5t618_regs {
  71         u8 addr;
  72         u8 val;
  73         u8 mask;
  74 } rn5t618_regs[] = {
  75 #if CONFIG_TX6_REV == 2
  76         { RN5T618_NOETIMSET, 0, },
  77         { RN5T618_DC1DAC, VDD_CORE_VAL, },
  78         { RN5T618_DC2DAC, VDD_SOC_VAL, },
  79         { RN5T618_DC3DAC, VDD_DDR_VAL, },
  80         { RN5T618_DC1DAC_SLP, VDD_CORE_VAL_LP, },
  81         { RN5T618_DC2DAC_SLP, VDD_SOC_VAL_LP, },
  82         { RN5T618_DC3DAC_SLP, VDD_DDR_VAL_LP, },
  83         { RN5T618_LDOEN1, 0x01f, ~0x1f, },
  84         { RN5T618_LDOEN2, 0x10, ~0x30, },
  85         { RN5T618_LDODIS, 0x00, },
  86         { RN5T618_LDO3DAC, VDD_HIGH_VAL, },
  87         { RN5T618_LDORTCDAC, VDD_RTC_VAL, },
  88         { RN5T618_LDORTC1_SLOT, 0x0f, ~0x3f, },
  89 #elif CONFIG_TX6_REV == 3
  90         { RN5T618_NOETIMSET, 0, },
  91         { RN5T618_DC1DAC, VDD_CORE_VAL, },
  92         { RN5T618_DC2DAC, VDD_SOC_VAL, },
  93         { RN5T618_DC3DAC, VDD_DDR_VAL, },
  94         { RN5T618_DC1DAC_SLP, VDD_CORE_VAL_LP, },
  95         { RN5T618_DC2DAC_SLP, VDD_SOC_VAL_LP, },
  96         { RN5T618_DC3DAC_SLP, VDD_DDR_VAL_LP, },
  97         { RN5T618_LDOEN1, 0x01f, ~0x1f, },
  98         { RN5T618_LDOEN2, 0x10, ~0x30, },
  99         { RN5T618_LDODIS, 0x00, },
 100         { RN5T618_LDO3DAC, VDD_HIGH_VAL, },
 101         { RN5T618_LDORTCDAC, VDD_RTC_VAL, },
 102         { RN5T618_LDORTC1_SLOT, 0x0f, ~0x3f, },
 103 #else
 104 #error Unsupported TX6 module revision
 105 #endif
 106 };
 107
 108 static int rn5t618_setup_regs(struct rn5t618_regs *r, size_t count)
 109 {
 110         int ret;
 111         int i;
 112
 113         for (i = 0; i < count; i++, r++) {
 114                 unsigned char value;
 115
 116                 ret = i2c_read(CONFIG_SYS_I2C_SLAVE, r->addr, 1, &value, 1);
 117                 printf("PMIC reg %02x = %02x\n",
 118                         r->addr, value);
 119         }
 120         for (i = 0; i < count; i++, r++) {
 121 #ifdef DEBUG
 122                 unsigned char value;
 123
 124                 ret = i2c_read(CONFIG_SYS_I2C_SLAVE, r->addr, 1, &value, 1);
 125                 if ((value & ~r->mask) != r->val) {
 126                         printf("Changing PMIC reg %02x from %02x to %02x\n",
 127                                 r->addr, value, r->val);
 128                 }
 129                 if (ret) {
 130                         printf("%s: failed to read PMIC register %02x: %d\n",
 131                                 __func__, r->addr, ret);
 132                         return ret;
 133                 }
 134 #endif
 135                 ret = i2c_write(CONFIG_SYS_I2C_SLAVE,
 136                                 r->addr, 1, &r->val, 1);
 137                 if (ret) {
 138                         printf("%s: failed to write PMIC register %02x: %d\n",
 139                                 __func__, r->addr, ret);
 140                         return ret;
 141                 }
 142 #ifdef DEBUG
 143                 ret = i2c_read(CONFIG_SYS_I2C_SLAVE, r->addr, 1, &value, 1);
 144                 printf("PMIC reg %02x is %02x\n", r->addr, value);
 145 #endif
 146         }
 147         return 0;
 148 }
 149
 150 int setup_pmic_voltages(void)
 151 {
 152         int ret;
 153         unsigned char value;
 154
 155         ret = i2c_probe(CONFIG_SYS_I2C_SLAVE);
 156         if (ret != 0) {
 157                 printf("Failed to initialize I2C\n");
 158                 return ret;
 159         }
 160
 161         ret = i2c_read(CONFIG_SYS_I2C_SLAVE, 0x11, 1, &value, 1);
 162         if (ret) {
 163                 printf("%s: i2c_read error: %d\n", __func__, ret);
 164                 return ret;
 165         }
 166
 167         ret = rn5t618_setup_regs(rn5t618_regs, ARRAY_SIZE(rn5t618_regs));
 168         if (ret)
 169                 return ret;
 170
 171         printf("VDDCORE set to %umV\n",
 172                 DIV_ROUND(regval_to_mV(VDD_CORE_VAL), 10));
 173         printf("VDDSOC  set to %umV\n",
 174                 DIV_ROUND(regval_to_mV(VDD_SOC_VAL), 10));
 175
 176         return ret;
 177 }