board/toradex/apalis_imx6/pf0100.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2014-2016, Toradex AG
   4  */
   5
   6 /*
   7  * Helpers for Freescale PMIC PF0100
   8 */
   9
  10 #include <common.h>
  11 #include <i2c.h>
  12 #include <linux/compiler.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
  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 __maybe_unused 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 #ifndef CONFIG_SPL_BUILD
 165 static int pf0100_prog(void)
 166 {
 167         unsigned char bus = 1;
 168         unsigned char val;
 169         unsigned int i;
 170
 171         if (pmic_init() == 3) {
 172                 puts("PMIC already programmed, exiting\n");
 173                 return CMD_RET_FAILURE;
 174         }
 175         /* set up gpio to manipulate vprog, initially off */
 176         imx_iomux_v3_setup_multiple_pads(pmic_prog_pads,
 177                                          ARRAY_SIZE(pmic_prog_pads));
 178         gpio_direction_output(PMIC_PROG_VOLTAGE, 0);
 179
 180         if (!((0 == i2c_set_bus_num(bus)) &&
 181               (0 == i2c_probe(PFUZE100_I2C_ADDR)))) {
 182                 puts("i2c bus failed\n");
 183                 return CMD_RET_FAILURE;
 184         }
 185
 186         for (i = 0; i < ARRAY_SIZE(pmic_otp_prog); i++) {
 187                 switch (pmic_otp_prog[i].cmd) {
 188                 case pmic_i2c:
 189                         val = (unsigned char) (pmic_otp_prog[i].value & 0xff);
 190                         if (i2c_write(PFUZE100_I2C_ADDR, pmic_otp_prog[i].reg,
 191                                       1, &val, 1)) {
 192                                 printf("i2c write failed, reg 0x%2x, value 0x%2x\n",
 193                                        pmic_otp_prog[i].reg, val);
 194                                 return CMD_RET_FAILURE;
 195                         }
 196                         break;
 197                 case pmic_delay:
 198                         udelay(pmic_otp_prog[i].value * 1000);
 199                         break;
 200                 case pmic_vpgm:
 201                         gpio_direction_output(PMIC_PROG_VOLTAGE,
 202                                               pmic_otp_prog[i].value);
 203                         break;
 204                 case pmic_pwr:
 205                         /* TODO */
 206                         break;
 207                 }
 208         }
 209         return CMD_RET_SUCCESS;
 210 }
 211
 212 static int do_pf0100_prog(cmd_tbl_t *cmdtp, int flag, int argc,
 213                 char * const argv[])
 214 {
 215         int ret;
 216         puts("Programming PMIC OTP...");
 217         ret = pf0100_prog();
 218         if (ret == CMD_RET_SUCCESS)
 219                 puts("done.\n");
 220         else
 221                 puts("failed.\n");
 222         return ret;
 223 }
 224
 225 U_BOOT_CMD(
 226         pf0100_otp_prog, 1, 0, do_pf0100_prog,
 227         "Program the OTP fuses on the PMIC PF0100",
 228         ""
 229 );
 230 #endif