board/toradex/apalis_imx6/pf0100.c

   1 /*
   2  * Copyright (C) 2014-2016, Toradex AG
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 /*
   8  * Helpers for Freescale PMIC PF0100
   9 */
  10
  11 #include <common.h>
  12 #include <i2c.h>
  13 #include <asm/arch/imx-regs.h>
  14 #include <asm/arch/iomux.h>
  15 #include <asm/arch/mx6-pins.h>
  16 #include <asm/gpio.h>
  17 #include <asm/imx-common/iomux-v3.h>
  18
  19 #include "pf0100_otp.inc"
  20 #include "pf0100.h"
  21
  22 /* define for PMIC register dump */
  23 /*#define DEBUG */
  24
  25 /* use Apalis GPIO1 to switch on VPGM, ON: 1 */
  26 static iomux_v3_cfg_t const pmic_prog_pads[] = {
  27         MX6_PAD_NANDF_D4__GPIO2_IO04 | MUX_PAD_CTRL(NO_PAD_CTRL),
  28 #       define PMIC_PROG_VOLTAGE IMX_GPIO_NR(2, 4)
  29 };
  30
  31 unsigned pmic_init(void)
  32 {
  33         unsigned programmed = 0;
  34         uchar bus = 1;
  35         uchar devid, revid, val;
  36
  37         puts("PMIC: ");
  38         if (!((0 == i2c_set_bus_num(bus)) &&
  39               (0 == i2c_probe(PFUZE100_I2C_ADDR)))) {
  40                 puts("i2c bus failed\n");
  41                 return 0;
  42         }
  43         /* get device ident */
  44         if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_DEVICEID, 1, &devid, 1) < 0) {
  45                 puts("i2c pmic devid read failed\n");
  46                 return 0;
  47         }
  48         if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_REVID, 1, &revid, 1) < 0) {
  49                 puts("i2c pmic revid read failed\n");
  50                 return 0;
  51         }
  52         printf("device id: 0x%.2x, revision id: 0x%.2x\n", devid, revid);
  53
  54 #ifdef DEBUG
  55         {
  56                 unsigned i, j;
  57
  58                 for (i = 0; i < 16; i++)
  59                         printf("\t%x", i);
  60                 for (j = 0; j < 0x80; ) {
  61                         printf("\n%2x", j);
  62                         for (i = 0; i < 16; i++) {
  63                                 i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1);
  64                                 printf("\t%2x", val);
  65                         }
  66                         j += 0x10;
  67                 }
  68                 printf("\nEXT Page 1");
  69
  70                 val = PFUZE100_PAGE_REGISTER_PAGE1;
  71                 if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1,
  72                               &val, 1)) {
  73                         puts("i2c write failed\n");
  74                         return 0;
  75                 }
  76
  77                 for (j = 0x80; j < 0x100; ) {
  78                         printf("\n%2x", j);
  79                         for (i = 0; i < 16; i++) {
  80                                 i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1);
  81                                 printf("\t%2x", val);
  82                         }
  83                         j += 0x10;
  84                 }
  85                 printf("\nEXT Page 2");
  86
  87                 val = PFUZE100_PAGE_REGISTER_PAGE2;
  88                 if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1,
  89                               &val, 1)) {
  90                         puts("i2c write failed\n");
  91                         return 0;
  92                 }
  93
  94                 for (j = 0x80; j < 0x100; ) {
  95                         printf("\n%2x", j);
  96                         for (i = 0; i < 16; i++) {
  97                                 i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1);
  98                                 printf("\t%2x", val);
  99                         }
 100                         j += 0x10;
 101                 }
 102                 printf("\n");
 103         }
 104 #endif
 105         /* get device programmed state */
 106         val = PFUZE100_PAGE_REGISTER_PAGE1;
 107         if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1, &val, 1)) {
 108                 puts("i2c write failed\n");
 109                 return 0;
 110         }
 111         if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR1, 1, &val, 1) < 0) {
 112                 puts("i2c fuse_por read failed\n");
 113                 return 0;
 114         }
 115         if (val & PFUZE100_FUSE_POR_M)
 116                 programmed++;
 117
 118         if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR2, 1, &val, 1) < 0) {
 119                 puts("i2c fuse_por read failed\n");
 120                 return programmed;
 121         }
 122         if (val & PFUZE100_FUSE_POR_M)
 123                 programmed++;
 124
 125         if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR3, 1, &val, 1) < 0) {
 126                 puts("i2c fuse_por read failed\n");
 127                 return programmed;
 128         }
 129         if (val & PFUZE100_FUSE_POR_M)
 130                 programmed++;
 131
 132         switch (programmed) {
 133         case 0:
 134                 printf("PMIC: not programmed\n");
 135                 break;
 136         case 3:
 137                 printf("PMIC: programmed\n");
 138                 break;
 139         default:
 140                 printf("PMIC: undefined programming state\n");
 141                 break;
 142         }
 143
 144         /* The following is needed during production */
 145         if (programmed != 3) {
 146                 /* set VGEN1 to 1.2V */
 147                 val = PFUZE100_VGEN1_VAL;
 148                 if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_VGEN1CTL, 1,
 149                               &val, 1)) {
 150                         puts("i2c write failed\n");
 151                         return programmed;
 152                 }
 153
 154                 /* set SWBST to 5.0V */
 155                 val = PFUZE100_SWBST_VAL;
 156                 if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_SWBSTCTL, 1,
 157                               &val, 1)) {
 158                         puts("i2c write failed\n");
 159                 }
 160         }
 161         return programmed;
 162 }
 163
 164 int pf0100_prog(void)
 165 {
 166         unsigned char bus = 1;
 167         unsigned char val;
 168         unsigned int i;
 169
 170         if (pmic_init() == 3) {
 171                 puts("PMIC already programmed, exiting\n");
 172                 return CMD_RET_FAILURE;
 173         }
 174         /* set up gpio to manipulate vprog, initially off */
 175         imx_iomux_v3_setup_multiple_pads(pmic_prog_pads,
 176                                          ARRAY_SIZE(pmic_prog_pads));
 177         gpio_direction_output(PMIC_PROG_VOLTAGE, 0);
 178
 179         if (!((0 == i2c_set_bus_num(bus)) &&
 180               (0 == i2c_probe(PFUZE100_I2C_ADDR)))) {
 181                 puts("i2c bus failed\n");
 182                 return CMD_RET_FAILURE;
 183         }
 184
 185         for (i = 0; i < ARRAY_SIZE(pmic_otp_prog); i++) {
 186                 switch (pmic_otp_prog[i].cmd) {
 187                 case pmic_i2c:
 188                         val = (unsigned char) (pmic_otp_prog[i].value & 0xff);
 189                         if (i2c_write(PFUZE100_I2C_ADDR, pmic_otp_prog[i].reg,
 190                                       1, &val, 1)) {
 191                                 printf("i2c write failed, reg 0x%2x, value 0x%2x\n",
 192                                        pmic_otp_prog[i].reg, val);
 193                                 return CMD_RET_FAILURE;
 194                         }
 195                         break;
 196                 case pmic_delay:
 197                         udelay(pmic_otp_prog[i].value * 1000);
 198                         break;
 199                 case pmic_vpgm:
 200                         gpio_direction_output(PMIC_PROG_VOLTAGE,
 201                                               pmic_otp_prog[i].value);
 202                         break;
 203                 case pmic_pwr:
 204                         /* TODO */
 205                         break;
 206                 }
 207         }
 208         return CMD_RET_SUCCESS;
 209 }
 210
 211 int do_pf0100_prog(cmd_tbl_t *cmdtp, int flag, int argc,
 212                 char * const argv[])
 213 {
 214         int ret;
 215         puts("Programming PMIC OTP...");
 216         ret = pf0100_prog();
 217         if (ret == CMD_RET_SUCCESS)
 218                 puts("done.\n");
 219         else
 220                 puts("failed.\n");
 221         return ret;
 222 }
 223
 224 U_BOOT_CMD(
 225         pf0100_otp_prog, 1, 0, do_pf0100_prog,
 226         "Program the OTP fuses on the PMIC PF0100",
 227         ""
 228 );