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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2014-2016, Toradex AG
*/
/*
* Helpers for Freescale PMIC PF0100
*/
#include <common.h>
#include <i2c.h>
#include <linux/compiler.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/iomux.h>
#include <asm/arch/mx6-pins.h>
#include <asm/gpio.h>
#include <asm/mach-imx/iomux-v3.h>
#include "pf0100_otp.inc"
#include "pf0100.h"
/* define for PMIC register dump */
/*#define DEBUG */
/* use Apalis GPIO1 to switch on VPGM, ON: 1 */
static __maybe_unused iomux_v3_cfg_t const pmic_prog_pads[] = {
MX6_PAD_NANDF_D4__GPIO2_IO04 | MUX_PAD_CTRL(NO_PAD_CTRL),
# define PMIC_PROG_VOLTAGE IMX_GPIO_NR(2, 4)
};
unsigned pmic_init(void)
{
unsigned programmed = 0;
uchar bus = 1;
uchar devid, revid, val;
puts("PMIC: ");
if (!((0 == i2c_set_bus_num(bus)) &&
(0 == i2c_probe(PFUZE100_I2C_ADDR)))) {
puts("i2c bus failed\n");
return 0;
}
/* get device ident */
if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_DEVICEID, 1, &devid, 1) < 0) {
puts("i2c pmic devid read failed\n");
return 0;
}
if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_REVID, 1, &revid, 1) < 0) {
puts("i2c pmic revid read failed\n");
return 0;
}
printf("device id: 0x%.2x, revision id: 0x%.2x\n", devid, revid);
#ifdef DEBUG
{
unsigned i, j;
for (i = 0; i < 16; i++)
printf("\t%x", i);
for (j = 0; j < 0x80; ) {
printf("\n%2x", j);
for (i = 0; i < 16; i++) {
i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1);
printf("\t%2x", val);
}
j += 0x10;
}
printf("\nEXT Page 1");
val = PFUZE100_PAGE_REGISTER_PAGE1;
if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1,
&val, 1)) {
puts("i2c write failed\n");
return 0;
}
for (j = 0x80; j < 0x100; ) {
printf("\n%2x", j);
for (i = 0; i < 16; i++) {
i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1);
printf("\t%2x", val);
}
j += 0x10;
}
printf("\nEXT Page 2");
val = PFUZE100_PAGE_REGISTER_PAGE2;
if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1,
&val, 1)) {
puts("i2c write failed\n");
return 0;
}
for (j = 0x80; j < 0x100; ) {
printf("\n%2x", j);
for (i = 0; i < 16; i++) {
i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1);
printf("\t%2x", val);
}
j += 0x10;
}
printf("\n");
}
#endif
/* get device programmed state */
val = PFUZE100_PAGE_REGISTER_PAGE1;
if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1, &val, 1)) {
puts("i2c write failed\n");
return 0;
}
if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR1, 1, &val, 1) < 0) {
puts("i2c fuse_por read failed\n");
return 0;
}
if (val & PFUZE100_FUSE_POR_M)
programmed++;
if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR2, 1, &val, 1) < 0) {
puts("i2c fuse_por read failed\n");
return programmed;
}
if (val & PFUZE100_FUSE_POR_M)
programmed++;
if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR3, 1, &val, 1) < 0) {
puts("i2c fuse_por read failed\n");
return programmed;
}
if (val & PFUZE100_FUSE_POR_M)
programmed++;
switch (programmed) {
case 0:
printf("PMIC: not programmed\n");
break;
case 3:
printf("PMIC: programmed\n");
break;
default:
printf("PMIC: undefined programming state\n");
break;
}
/* The following is needed during production */
if (programmed != 3) {
/* set VGEN1 to 1.2V */
val = PFUZE100_VGEN1_VAL;
if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_VGEN1CTL, 1,
&val, 1)) {
puts("i2c write failed\n");
return programmed;
}
/* set SWBST to 5.0V */
val = PFUZE100_SWBST_VAL;
if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_SWBSTCTL, 1,
&val, 1)) {
puts("i2c write failed\n");
}
}
return programmed;
}
#ifndef CONFIG_SPL_BUILD
static int pf0100_prog(void)
{
unsigned char bus = 1;
unsigned char val;
unsigned int i;
if (pmic_init() == 3) {
puts("PMIC already programmed, exiting\n");
return CMD_RET_FAILURE;
}
/* set up gpio to manipulate vprog, initially off */
imx_iomux_v3_setup_multiple_pads(pmic_prog_pads,
ARRAY_SIZE(pmic_prog_pads));
gpio_direction_output(PMIC_PROG_VOLTAGE, 0);
if (!((0 == i2c_set_bus_num(bus)) &&
(0 == i2c_probe(PFUZE100_I2C_ADDR)))) {
puts("i2c bus failed\n");
return CMD_RET_FAILURE;
}
for (i = 0; i < ARRAY_SIZE(pmic_otp_prog); i++) {
switch (pmic_otp_prog[i].cmd) {
case pmic_i2c:
val = (unsigned char) (pmic_otp_prog[i].value & 0xff);
if (i2c_write(PFUZE100_I2C_ADDR, pmic_otp_prog[i].reg,
1, &val, 1)) {
printf("i2c write failed, reg 0x%2x, value 0x%2x\n",
pmic_otp_prog[i].reg, val);
return CMD_RET_FAILURE;
}
break;
case pmic_delay:
udelay(pmic_otp_prog[i].value * 1000);
break;
case pmic_vpgm:
gpio_direction_output(PMIC_PROG_VOLTAGE,
pmic_otp_prog[i].value);
break;
case pmic_pwr:
/* TODO */
break;
}
}
return CMD_RET_SUCCESS;
}
static int do_pf0100_prog(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
int ret;
puts("Programming PMIC OTP...");
ret = pf0100_prog();
if (ret == CMD_RET_SUCCESS)
puts("done.\n");
else
puts("failed.\n");
return ret;
}
U_BOOT_CMD(
pf0100_otp_prog, 1, 0, do_pf0100_prog,
"Program the OTP fuses on the PMIC PF0100",
""
);
#endif
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