board/toradex/apalis_imx6/pf0100.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2014-2019, Toradex AG
   4  */
   5
   6 /*
   7  * Helpers for Freescale PMIC PF0100
   8 */
   9
  10 #include <common.h>
  11 #include <i2c.h>
  12 #include <asm/arch/imx-regs.h>
  13 #include <asm/arch/iomux.h>
  14 #include <asm/arch/mx6-pins.h>
  15 #include <asm/gpio.h>
  16 #include <asm/mach-imx/iomux-v3.h>
  17
  18 #include "pf0100_otp.inc"
  19 #include "pf0100.h"
  20
  21 /* define for PMIC register dump */
  22 /*#define DEBUG */
  23
  24 #define WARNBAR "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n"
  25
  26 /* use Apalis GPIO1 to switch on VPGM, ON: 1 */
  27 static __maybe_unused iomux_v3_cfg_t const pmic_prog_pads[] = {
  28         MX6_PAD_NANDF_D4__GPIO2_IO04 | MUX_PAD_CTRL(NO_PAD_CTRL),
  29 #       define PMIC_PROG_VOLTAGE IMX_GPIO_NR(2, 4)
  30 };
  31
  32 unsigned pmic_init(void)
  33 {
  34         int rc;
  35         struct udevice *dev = NULL;
  36         unsigned programmed = 0;
  37         uchar bus = 1;
  38         uchar devid, revid, val;
  39
  40         puts("PMIC:  ");
  41         rc = i2c_get_chip_for_busnum(bus, PFUZE100_I2C_ADDR, 1, &dev);
  42         if (rc) {
  43                 printf("failed to get device for PMIC at address 0x%x\n",
  44                        PFUZE100_I2C_ADDR);
  45                 return 0;
  46         }
  47
  48         /* check for errors in PMIC fuses */
  49         if (dm_i2c_read(dev, PFUZE100_INTSTAT3, &val, 1) < 0) {
  50                 puts("i2c pmic INTSTAT3 register read failed\n");
  51                 return 0;
  52         }
  53         if (val & PFUZE100_BIT_OTP_ECCI) {
  54                 puts("\n" WARNBAR);
  55                 puts("WARNING: ecc errors found in pmic fuse banks\n");
  56                 puts(WARNBAR);
  57         }
  58         if (dm_i2c_read(dev, PFUZE100_OTP_ECC_SE1, &val, 1) < 0) {
  59                 puts("i2c pmic ECC_SE1 register read failed\n");
  60                 return 0;
  61         }
  62         if (val & PFUZE100_BITS_ECC_SE1) {
  63                 puts(WARNBAR);
  64                 puts("WARNING: ecc has made bit corrections in banks 1 to 5\n");
  65                 puts(WARNBAR);
  66         }
  67         if (dm_i2c_read(dev, PFUZE100_OTP_ECC_SE2, &val, 1) < 0) {
  68                 puts("i2c pmic ECC_SE2 register read failed\n");
  69                 return 0;
  70         }
  71         if (val & PFUZE100_BITS_ECC_SE2) {
  72                 puts(WARNBAR);
  73                 puts("WARNING: ecc has made bit corrections in banks 6 to 10\n"
  74                     );
  75                 puts(WARNBAR);
  76         }
  77         if (dm_i2c_read(dev, PFUZE100_OTP_ECC_DE1, &val, 1) < 0) {
  78                 puts("i2c pmic ECC_DE register read failed\n");
  79                 return 0;
  80         }
  81         if (val & PFUZE100_BITS_ECC_DE1) {
  82                 puts(WARNBAR);
  83                 puts("ERROR: banks 1 to 5 have uncorrectable bits\n");
  84                 puts(WARNBAR);
  85         }
  86         if (dm_i2c_read(dev, PFUZE100_OTP_ECC_DE2, &val, 1) < 0) {
  87                 puts("i2c pmic ECC_DE register read failed\n");
  88                 return 0;
  89         }
  90         if (val & PFUZE100_BITS_ECC_DE2) {
  91                 puts(WARNBAR);
  92                 puts("ERROR: banks 6 to 10 have uncorrectable bits\n");
  93                 puts(WARNBAR);
  94         }
  95
  96         /* get device ident */
  97         if (dm_i2c_read(dev, PFUZE100_DEVICEID, &devid, 1) < 0) {
  98                 puts("i2c pmic devid read failed\n");
  99                 return 0;
 100         }
 101         if (dm_i2c_read(dev, PFUZE100_REVID, &revid, 1) < 0) {
 102                 puts("i2c pmic revid read failed\n");
 103                 return 0;
 104         }
 105         printf("device id: 0x%.2x, revision id: 0x%.2x, ", devid, revid);
 106
 107         /* get device programmed state */
 108         val = PFUZE100_PAGE_REGISTER_PAGE1;
 109         if (dm_i2c_write(dev, PFUZE100_PAGE_REGISTER, &val, 1)) {
 110                 puts("i2c write failed\n");
 111                 return 0;
 112         }
 113         if (dm_i2c_read(dev, PFUZE100_FUSE_POR1, &val, 1) < 0) {
 114                 puts("i2c fuse_por read failed\n");
 115                 return 0;
 116         }
 117         if (val & PFUZE100_FUSE_POR_M)
 118                 programmed++;
 119
 120         if (dm_i2c_read(dev, PFUZE100_FUSE_POR2, &val, 1) < 0) {
 121                 puts("i2c fuse_por read failed\n");
 122                 return programmed;
 123         }
 124         if (val & PFUZE100_FUSE_POR_M)
 125                 programmed++;
 126
 127         if (dm_i2c_read(dev, PFUZE100_FUSE_POR3, &val, 1) < 0) {
 128                 puts("i2c fuse_por read failed\n");
 129                 return programmed;
 130         }
 131         if (val & PFUZE100_FUSE_POR_M)
 132                 programmed++;
 133
 134         switch (programmed) {
 135         case 0:
 136                 puts("not programmed\n");
 137                 break;
 138         case 3:
 139                 puts("programmed\n");
 140                 break;
 141         default:
 142                 puts("undefined programming state\n");
 143                 break;
 144         }
 145
 146         /* The following is needed during production */
 147         if (programmed != 3) {
 148                 /* set VGEN1 to 1.2V */
 149                 val = PFUZE100_VGEN1_VAL;
 150                 if (dm_i2c_write(dev, PFUZE100_VGEN1CTL, &val, 1)) {
 151                         puts("i2c write failed\n");
 152                         return programmed;
 153                 }
 154
 155                 /* set SWBST to 5.0V */
 156                 val = PFUZE100_SWBST_VAL;
 157                 if (dm_i2c_write(dev, PFUZE100_SWBSTCTL, &val, 1))
 158                         puts("i2c write failed\n");
 159         }
 160
 161 #ifdef DEBUG
 162         {
 163                 unsigned int i, j;
 164
 165                 for (i = 0; i < 16; i++)
 166                         printf("\t%x", i);
 167                 for (j = 0; j < 0x80; ) {
 168                         printf("\n%2x", j);
 169                         for (i = 0; i < 16; i++) {
 170                                 dm_i2c_read(dev, j + i, &val, 1);
 171                                 printf("\t%2x", val);
 172                         }
 173                         j += 0x10;
 174                 }
 175                 printf("\nEXT Page 1");
 176
 177                 val = PFUZE100_PAGE_REGISTER_PAGE1;
 178                 if (dm_i2c_write(dev, PFUZE100_PAGE_REGISTER, &val, 1)) {
 179                         puts("i2c write failed\n");
 180                         return 0;
 181                 }
 182
 183                 for (j = 0x80; j < 0x100; ) {
 184                         printf("\n%2x", j);
 185                         for (i = 0; i < 16; i++) {
 186                                 dm_i2c_read(dev, j + i, &val, 1);
 187                                 printf("\t%2x", val);
 188                         }
 189                         j += 0x10;
 190                 }
 191                 printf("\nEXT Page 2");
 192
 193                 val = PFUZE100_PAGE_REGISTER_PAGE2;
 194                 if (dm_i2c_write(dev, PFUZE100_PAGE_REGISTER, &val, 1)) {
 195                         puts("i2c write failed\n");
 196                         return 0;
 197                 }
 198
 199                 for (j = 0x80; j < 0x100; ) {
 200                         printf("\n%2x", j);
 201                         for (i = 0; i < 16; i++) {
 202                                 dm_i2c_read(dev, j + i, &val, 1);
 203                                 printf("\t%2x", val);
 204                         }
 205                         j += 0x10;
 206                 }
 207                 printf("\n");
 208         }
 209 #endif /* DEBUG */
 210
 211         return programmed;
 212 }
 213
 214 #ifndef CONFIG_SPL_BUILD
 215 static int pf0100_prog(void)
 216 {
 217         int rc;
 218         struct udevice *dev = NULL;
 219         unsigned char bus = 1;
 220         unsigned char val;
 221         unsigned int i;
 222
 223         if (pmic_init() == 3) {
 224                 puts("PMIC already programmed, exiting\n");
 225                 return CMD_RET_FAILURE;
 226         }
 227         /* set up gpio to manipulate vprog, initially off */
 228         imx_iomux_v3_setup_multiple_pads(pmic_prog_pads,
 229                                          ARRAY_SIZE(pmic_prog_pads));
 230         gpio_direction_output(PMIC_PROG_VOLTAGE, 0);
 231
 232         rc = i2c_get_chip_for_busnum(bus, PFUZE100_I2C_ADDR, 1, &dev);
 233         if (rc) {
 234                 printf("failed to get device for PMIC at address 0x%x\n",
 235                        PFUZE100_I2C_ADDR);
 236                 return CMD_RET_FAILURE;
 237         }
 238
 239         for (i = 0; i < ARRAY_SIZE(pmic_otp_prog); i++) {
 240                 switch (pmic_otp_prog[i].cmd) {
 241                 case pmic_i2c:
 242                         val = (unsigned char) (pmic_otp_prog[i].value & 0xff);
 243                         if (dm_i2c_write(dev, pmic_otp_prog[i].reg, &val, 1)) {
 244                                 printf("i2c write failed, reg 0x%2x, value 0x%2x\n",
 245                                        pmic_otp_prog[i].reg, val);
 246                                 return CMD_RET_FAILURE;
 247                         }
 248                         break;
 249                 case pmic_delay:
 250                         udelay(pmic_otp_prog[i].value * 1000);
 251                         break;
 252                 case pmic_vpgm:
 253                         gpio_direction_output(PMIC_PROG_VOLTAGE,
 254                                               pmic_otp_prog[i].value);
 255                         break;
 256                 case pmic_pwr:
 257                         /* TODO */
 258                         break;
 259                 }
 260         }
 261         return CMD_RET_SUCCESS;
 262 }
 263
 264 static int do_pf0100_prog(cmd_tbl_t *cmdtp, int flag, int argc,
 265                 char * const argv[])
 266 {
 267         int ret;
 268         puts("Programming PMIC OTP...");
 269         ret = pf0100_prog();
 270         if (ret == CMD_RET_SUCCESS)
 271                 puts("done.\n");
 272         else
 273                 puts("failed.\n");
 274         return ret;
 275 }
 276
 277 U_BOOT_CMD(
 278         pf0100_otp_prog, 1, 0, do_pf0100_prog,
 279         "Program the OTP fuses on the PMIC PF0100",
 280         ""
 281 );
 282 #endif /* CONFIG_SPL_BUILD */