board/toradex/colibri_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 <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 /* use GPIO: EXT_IO1 to switch on VPGM, ON: 1 */
  25 static __maybe_unused iomux_v3_cfg_t const pmic_prog_pads[] = {
  26         MX6_PAD_NANDF_D3__GPIO2_IO03 | MUX_PAD_CTRL(NO_PAD_CTRL),
  27 #       define PMIC_PROG_VOLTAGE IMX_GPIO_NR(2, 3)
  28 };
  29
  30 unsigned pmic_init(void)
  31 {
  32         unsigned programmed = 0;
  33         uchar bus = 1;
  34         uchar devid, revid, val;
  35
  36         puts("PMIC: ");
  37         if (!((0 == i2c_set_bus_num(bus)) &&
  38               (0 == i2c_probe(PFUZE100_I2C_ADDR)))) {
  39                 puts("i2c bus failed\n");
  40                 return 0;
  41         }
  42         /* get device ident */
  43         if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_DEVICEID, 1, &devid, 1) < 0) {
  44                 puts("i2c pmic devid read failed\n");
  45                 return 0;
  46         }
  47         if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_REVID, 1, &revid, 1) < 0) {
  48                 puts("i2c pmic revid read failed\n");
  49                 return 0;
  50         }
  51         printf("device id: 0x%.2x, revision id: 0x%.2x\n", devid, revid);
  52
  53 #ifdef DEBUG
  54         {
  55                 unsigned i, j;
  56
  57                 for (i = 0; i < 16; i++)
  58                         printf("\t%x", i);
  59                 for (j = 0; j < 0x80; ) {
  60                         printf("\n%2x", j);
  61                         for (i = 0; i < 16; i++) {
  62                                 i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1);
  63                                 printf("\t%2x", val);
  64                         }
  65                         j += 0x10;
  66                 }
  67                 printf("\nEXT Page 1");
  68
  69                 val = PFUZE100_PAGE_REGISTER_PAGE1;
  70                 if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1,
  71                               &val, 1)) {
  72                         puts("i2c write failed\n");
  73                         return 0;
  74                 }
  75
  76                 for (j = 0x80; j < 0x100; ) {
  77                         printf("\n%2x", j);
  78                         for (i = 0; i < 16; i++) {
  79                                 i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1);
  80                                 printf("\t%2x", val);
  81                         }
  82                         j += 0x10;
  83                 }
  84                 printf("\nEXT Page 2");
  85
  86                 val = PFUZE100_PAGE_REGISTER_PAGE2;
  87                 if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1,
  88                               &val, 1)) {
  89                         puts("i2c write failed\n");
  90                         return 0;
  91                 }
  92
  93                 for (j = 0x80; j < 0x100; ) {
  94                         printf("\n%2x", j);
  95                         for (i = 0; i < 16; i++) {
  96                                 i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1);
  97                                 printf("\t%2x", val);
  98                         }
  99                         j += 0x10;
 100                 }
 101                 printf("\n");
 102         }
 103 #endif
 104         /* get device programmed state */
 105         val = PFUZE100_PAGE_REGISTER_PAGE1;
 106         if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1, &val, 1)) {
 107                 puts("i2c write failed\n");
 108                 return 0;
 109         }
 110         if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR1, 1, &val, 1) < 0) {
 111                 puts("i2c fuse_por read failed\n");
 112                 return 0;
 113         }
 114         if (val & PFUZE100_FUSE_POR_M)
 115                 programmed++;
 116
 117         if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR2, 1, &val, 1) < 0) {
 118                 puts("i2c fuse_por read failed\n");
 119                 return programmed;
 120         }
 121         if (val & PFUZE100_FUSE_POR_M)
 122                 programmed++;
 123
 124         if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR3, 1, &val, 1) < 0) {
 125                 puts("i2c fuse_por read failed\n");
 126                 return programmed;
 127         }
 128         if (val & PFUZE100_FUSE_POR_M)
 129                 programmed++;
 130
 131         switch (programmed) {
 132         case 0:
 133                 printf("PMIC: not programmed\n");
 134                 break;
 135         case 3:
 136                 printf("PMIC: programmed\n");
 137                 break;
 138         default:
 139                 printf("PMIC: undefined programming state\n");
 140                 break;
 141         }
 142
 143         return programmed;
 144 }
 145
 146 #ifndef CONFIG_SPL_BUILD
 147 static int pf0100_prog(void)
 148 {
 149         unsigned char bus = 1;
 150         unsigned char val;
 151         unsigned int i;
 152
 153         if (pmic_init() == 3) {
 154                 puts("PMIC already programmed, exiting\n");
 155                 return CMD_RET_FAILURE;
 156         }
 157         /* set up gpio to manipulate vprog, initially off */
 158         imx_iomux_v3_setup_multiple_pads(pmic_prog_pads,
 159                                          ARRAY_SIZE(pmic_prog_pads));
 160         gpio_direction_output(PMIC_PROG_VOLTAGE, 0);
 161
 162         if (!((0 == i2c_set_bus_num(bus)) &&
 163               (0 == i2c_probe(PFUZE100_I2C_ADDR)))) {
 164                 puts("i2c bus failed\n");
 165                 return CMD_RET_FAILURE;
 166         }
 167
 168         for (i = 0; i < ARRAY_SIZE(pmic_otp_prog); i++) {
 169                 switch (pmic_otp_prog[i].cmd) {
 170                 case pmic_i2c:
 171                         val = (unsigned char) (pmic_otp_prog[i].value & 0xff);
 172                         if (i2c_write(PFUZE100_I2C_ADDR, pmic_otp_prog[i].reg,
 173                                       1, &val, 1)) {
 174                                 printf("i2c write failed, reg 0x%2x, value 0x%2x\n",
 175                                        pmic_otp_prog[i].reg, val);
 176                                 return CMD_RET_FAILURE;
 177                         }
 178                         break;
 179                 case pmic_delay:
 180                         udelay(pmic_otp_prog[i].value * 1000);
 181                         break;
 182                 case pmic_vpgm:
 183                         gpio_direction_output(PMIC_PROG_VOLTAGE,
 184                                               pmic_otp_prog[i].value);
 185                         break;
 186                 case pmic_pwr:
 187                         /* TODO */
 188                         break;
 189                 }
 190         }
 191         return CMD_RET_SUCCESS;
 192 }
 193
 194 static int do_pf0100_prog(cmd_tbl_t *cmdtp, int flag, int argc,
 195                 char * const argv[])
 196 {
 197         int ret;
 198         puts("Programming PMIC OTP...");
 199         ret = pf0100_prog();
 200         if (ret == CMD_RET_SUCCESS)
 201                 puts("done.\n");
 202         else
 203                 puts("failed.\n");
 204         return ret;
 205 }
 206
 207 U_BOOT_CMD(
 208         pf0100_otp_prog, 1, 0, do_pf0100_prog,
 209         "Program the OTP fuses on the PMIC PF0100",
 210         ""
 211 );
 212 #endif