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