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 <command.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/mach-imx/iomux-v3.h>
  18 #include <linux/delay.h>
  19
  20 #include "pf0100_otp.inc"
  21 #include "pf0100.h"
  22
  23 /* define for PMIC register dump */
  24 /*#define DEBUG */
  25
  26 #define WARNBAR "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n"
  27
  28 /* use Apalis GPIO1 to switch on VPGM, ON: 1 */
  29 static __maybe_unused iomux_v3_cfg_t const pmic_prog_pads[] = {
  30         MX6_PAD_NANDF_D4__GPIO2_IO04 | MUX_PAD_CTRL(NO_PAD_CTRL),
  31 #       define PMIC_PROG_VOLTAGE IMX_GPIO_NR(2, 4)
  32 };
  33
  34 unsigned pmic_init(void)
  35 {
  36         int rc;
  37         struct udevice *dev = NULL;
  38         unsigned programmed = 0;
  39         uchar bus = 1;
  40         uchar devid, revid, val;
  41
  42         puts("PMIC:  ");
  43         rc = i2c_get_chip_for_busnum(bus, PFUZE100_I2C_ADDR, 1, &dev);
  44         if (rc) {
  45                 printf("failed to get device for PMIC at address 0x%x\n",
  46                        PFUZE100_I2C_ADDR);
  47                 return 0;
  48         }
  49
  50         /* check for errors in PMIC fuses */
  51         if (dm_i2c_read(dev, PFUZE100_INTSTAT3, &val, 1) < 0) {
  52                 puts("i2c pmic INTSTAT3 register read failed\n");
  53                 return 0;
  54         }
  55         if (val & PFUZE100_BIT_OTP_ECCI) {
  56                 puts("\n" WARNBAR);
  57                 puts("WARNING: ecc errors found in pmic fuse banks\n");
  58                 puts(WARNBAR);
  59         }
  60         if (dm_i2c_read(dev, PFUZE100_OTP_ECC_SE1, &val, 1) < 0) {
  61                 puts("i2c pmic ECC_SE1 register read failed\n");
  62                 return 0;
  63         }
  64         if (val & PFUZE100_BITS_ECC_SE1) {
  65                 puts(WARNBAR);
  66                 puts("WARNING: ecc has made bit corrections in banks 1 to 5\n");
  67                 puts(WARNBAR);
  68         }
  69         if (dm_i2c_read(dev, PFUZE100_OTP_ECC_SE2, &val, 1) < 0) {
  70                 puts("i2c pmic ECC_SE2 register read failed\n");
  71                 return 0;
  72         }
  73         if (val & PFUZE100_BITS_ECC_SE2) {
  74                 puts(WARNBAR);
  75                 puts("WARNING: ecc has made bit corrections in banks 6 to 10\n"
  76                     );
  77                 puts(WARNBAR);
  78         }
  79         if (dm_i2c_read(dev, PFUZE100_OTP_ECC_DE1, &val, 1) < 0) {
  80                 puts("i2c pmic ECC_DE register read failed\n");
  81                 return 0;
  82         }
  83         if (val & PFUZE100_BITS_ECC_DE1) {
  84                 puts(WARNBAR);
  85                 puts("ERROR: banks 1 to 5 have uncorrectable bits\n");
  86                 puts(WARNBAR);
  87         }
  88         if (dm_i2c_read(dev, PFUZE100_OTP_ECC_DE2, &val, 1) < 0) {
  89                 puts("i2c pmic ECC_DE register read failed\n");
  90                 return 0;
  91         }
  92         if (val & PFUZE100_BITS_ECC_DE2) {
  93                 puts(WARNBAR);
  94                 puts("ERROR: banks 6 to 10 have uncorrectable bits\n");
  95                 puts(WARNBAR);
  96         }
  97
  98         /* get device ident */
  99         if (dm_i2c_read(dev, PFUZE100_DEVICEID, &devid, 1) < 0) {
 100                 puts("i2c pmic devid read failed\n");
 101                 return 0;
 102         }
 103         if (dm_i2c_read(dev, PFUZE100_REVID, &revid, 1) < 0) {
 104                 puts("i2c pmic revid read failed\n");
 105                 return 0;
 106         }
 107         printf("device id: 0x%.2x, revision id: 0x%.2x, ", devid, revid);
 108
 109         /* get device programmed state */
 110         val = PFUZE100_PAGE_REGISTER_PAGE1;
 111         if (dm_i2c_write(dev, PFUZE100_PAGE_REGISTER, &val, 1)) {
 112                 puts("i2c write failed\n");
 113                 return 0;
 114         }
 115         if (dm_i2c_read(dev, PFUZE100_FUSE_POR1, &val, 1) < 0) {
 116                 puts("i2c fuse_por read failed\n");
 117                 return 0;
 118         }
 119         if (val & PFUZE100_FUSE_POR_M)
 120                 programmed++;
 121
 122         if (dm_i2c_read(dev, PFUZE100_FUSE_POR2, &val, 1) < 0) {
 123                 puts("i2c fuse_por read failed\n");
 124                 return programmed;
 125         }
 126         if (val & PFUZE100_FUSE_POR_M)
 127                 programmed++;
 128
 129         if (dm_i2c_read(dev, PFUZE100_FUSE_POR3, &val, 1) < 0) {
 130                 puts("i2c fuse_por read failed\n");
 131                 return programmed;
 132         }
 133         if (val & PFUZE100_FUSE_POR_M)
 134                 programmed++;
 135
 136         switch (programmed) {
 137         case 0:
 138                 puts("not programmed\n");
 139                 break;
 140         case 3:
 141                 puts("programmed\n");
 142                 break;
 143         default:
 144                 puts("undefined programming state\n");
 145                 break;
 146         }
 147
 148         /* The following is needed during production */
 149         if (programmed != 3) {
 150                 /* set VGEN1 to 1.2V */
 151                 val = PFUZE100_VGEN1_VAL;
 152                 if (dm_i2c_write(dev, PFUZE100_VGEN1CTL, &val, 1)) {
 153                         puts("i2c write failed\n");
 154                         return programmed;
 155                 }
 156
 157                 /* set SWBST to 5.0V */
 158                 val = PFUZE100_SWBST_VAL;
 159                 if (dm_i2c_write(dev, PFUZE100_SWBSTCTL, &val, 1))
 160                         puts("i2c write failed\n");
 161         }
 162
 163 #ifdef DEBUG
 164         {
 165                 unsigned int i, j;
 166
 167                 for (i = 0; i < 16; i++)
 168                         printf("\t%x", i);
 169                 for (j = 0; j < 0x80; ) {
 170                         printf("\n%2x", j);
 171                         for (i = 0; i < 16; i++) {
 172                                 dm_i2c_read(dev, j + i, &val, 1);
 173                                 printf("\t%2x", val);
 174                         }
 175                         j += 0x10;
 176                 }
 177                 printf("\nEXT Page 1");
 178
 179                 val = PFUZE100_PAGE_REGISTER_PAGE1;
 180                 if (dm_i2c_write(dev, PFUZE100_PAGE_REGISTER, &val, 1)) {
 181                         puts("i2c write failed\n");
 182                         return 0;
 183                 }
 184
 185                 for (j = 0x80; j < 0x100; ) {
 186                         printf("\n%2x", j);
 187                         for (i = 0; i < 16; i++) {
 188                                 dm_i2c_read(dev, j + i, &val, 1);
 189                                 printf("\t%2x", val);
 190                         }
 191                         j += 0x10;
 192                 }
 193                 printf("\nEXT Page 2");
 194
 195                 val = PFUZE100_PAGE_REGISTER_PAGE2;
 196                 if (dm_i2c_write(dev, PFUZE100_PAGE_REGISTER, &val, 1)) {
 197                         puts("i2c write failed\n");
 198                         return 0;
 199                 }
 200
 201                 for (j = 0x80; j < 0x100; ) {
 202                         printf("\n%2x", j);
 203                         for (i = 0; i < 16; i++) {
 204                                 dm_i2c_read(dev, j + i, &val, 1);
 205                                 printf("\t%2x", val);
 206                         }
 207                         j += 0x10;
 208                 }
 209                 printf("\n");
 210         }
 211 #endif /* DEBUG */
 212
 213         return programmed;
 214 }
 215
 216 #ifndef CONFIG_SPL_BUILD
 217 static int pf0100_prog(void)
 218 {
 219         int rc;
 220         struct udevice *dev = NULL;
 221         unsigned char bus = 1;
 222         unsigned char val;
 223         unsigned int i;
 224
 225         if (pmic_init() == 3) {
 226                 puts("PMIC already programmed, exiting\n");
 227                 return CMD_RET_FAILURE;
 228         }
 229         /* set up gpio to manipulate vprog, initially off */
 230         imx_iomux_v3_setup_multiple_pads(pmic_prog_pads,
 231                                          ARRAY_SIZE(pmic_prog_pads));
 232         gpio_direction_output(PMIC_PROG_VOLTAGE, 0);
 233
 234         rc = i2c_get_chip_for_busnum(bus, PFUZE100_I2C_ADDR, 1, &dev);
 235         if (rc) {
 236                 printf("failed to get device for PMIC at address 0x%x\n",
 237                        PFUZE100_I2C_ADDR);
 238                 return CMD_RET_FAILURE;
 239         }
 240
 241         for (i = 0; i < ARRAY_SIZE(pmic_otp_prog); i++) {
 242                 switch (pmic_otp_prog[i].cmd) {
 243                 case pmic_i2c:
 244                         val = (unsigned char) (pmic_otp_prog[i].value & 0xff);
 245                         if (dm_i2c_write(dev, pmic_otp_prog[i].reg, &val, 1)) {
 246                                 printf("i2c write failed, reg 0x%2x, value 0x%2x\n",
 247                                        pmic_otp_prog[i].reg, val);
 248                                 return CMD_RET_FAILURE;
 249                         }
 250                         break;
 251                 case pmic_delay:
 252                         udelay(pmic_otp_prog[i].value * 1000);
 253                         break;
 254                 case pmic_vpgm:
 255                         gpio_direction_output(PMIC_PROG_VOLTAGE,
 256                                               pmic_otp_prog[i].value);
 257                         break;
 258                 case pmic_pwr:
 259                         /* TODO */
 260                         break;
 261                 }
 262         }
 263         return CMD_RET_SUCCESS;
 264 }
 265
 266 static int do_pf0100_prog(struct cmd_tbl *cmdtp, int flag, int argc,
 267                           char *const argv[])
 268 {
 269         int ret;
 270         puts("Programming PMIC OTP...");
 271         ret = pf0100_prog();
 272         if (ret == CMD_RET_SUCCESS)
 273                 puts("done.\n");
 274         else
 275                 puts("failed.\n");
 276         return ret;
 277 }
 278
 279 U_BOOT_CMD(
 280         pf0100_otp_prog, 1, 0, do_pf0100_prog,
 281         "Program the OTP fuses on the PMIC PF0100",
 282         ""
 283 );
 284 #endif /* CONFIG_SPL_BUILD */