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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2014-2019, Toradex AG
- */
- /*
- * Helpers for Freescale PMIC PF0100
- */
- #include <common.h>
- #include <i2c.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 */
- #define WARNBAR "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n"
- /* 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)
- {
- int rc;
- struct udevice *dev = NULL;
- unsigned programmed = 0;
- uchar bus = 1;
- uchar devid, revid, val;
- puts("PMIC: ");
- rc = i2c_get_chip_for_busnum(bus, PFUZE100_I2C_ADDR, 1, &dev);
- if (rc) {
- printf("failed to get device for PMIC at address 0x%x\n",
- PFUZE100_I2C_ADDR);
- return 0;
- }
- /* check for errors in PMIC fuses */
- if (dm_i2c_read(dev, PFUZE100_INTSTAT3, &val, 1) < 0) {
- puts("i2c pmic INTSTAT3 register read failed\n");
- return 0;
- }
- if (val & PFUZE100_BIT_OTP_ECCI) {
- puts("\n" WARNBAR);
- puts("WARNING: ecc errors found in pmic fuse banks\n");
- puts(WARNBAR);
- }
- if (dm_i2c_read(dev, PFUZE100_OTP_ECC_SE1, &val, 1) < 0) {
- puts("i2c pmic ECC_SE1 register read failed\n");
- return 0;
- }
- if (val & PFUZE100_BITS_ECC_SE1) {
- puts(WARNBAR);
- puts("WARNING: ecc has made bit corrections in banks 1 to 5\n");
- puts(WARNBAR);
- }
- if (dm_i2c_read(dev, PFUZE100_OTP_ECC_SE2, &val, 1) < 0) {
- puts("i2c pmic ECC_SE2 register read failed\n");
- return 0;
- }
- if (val & PFUZE100_BITS_ECC_SE2) {
- puts(WARNBAR);
- puts("WARNING: ecc has made bit corrections in banks 6 to 10\n"
- );
- puts(WARNBAR);
- }
- if (dm_i2c_read(dev, PFUZE100_OTP_ECC_DE1, &val, 1) < 0) {
- puts("i2c pmic ECC_DE register read failed\n");
- return 0;
- }
- if (val & PFUZE100_BITS_ECC_DE1) {
- puts(WARNBAR);
- puts("ERROR: banks 1 to 5 have uncorrectable bits\n");
- puts(WARNBAR);
- }
- if (dm_i2c_read(dev, PFUZE100_OTP_ECC_DE2, &val, 1) < 0) {
- puts("i2c pmic ECC_DE register read failed\n");
- return 0;
- }
- if (val & PFUZE100_BITS_ECC_DE2) {
- puts(WARNBAR);
- puts("ERROR: banks 6 to 10 have uncorrectable bits\n");
- puts(WARNBAR);
- }
- /* get device ident */
- if (dm_i2c_read(dev, PFUZE100_DEVICEID, &devid, 1) < 0) {
- puts("i2c pmic devid read failed\n");
- return 0;
- }
- if (dm_i2c_read(dev, PFUZE100_REVID, &revid, 1) < 0) {
- puts("i2c pmic revid read failed\n");
- return 0;
- }
- printf("device id: 0x%.2x, revision id: 0x%.2x, ", devid, revid);
- /* get device programmed state */
- val = PFUZE100_PAGE_REGISTER_PAGE1;
- if (dm_i2c_write(dev, PFUZE100_PAGE_REGISTER, &val, 1)) {
- puts("i2c write failed\n");
- return 0;
- }
- if (dm_i2c_read(dev, PFUZE100_FUSE_POR1, &val, 1) < 0) {
- puts("i2c fuse_por read failed\n");
- return 0;
- }
- if (val & PFUZE100_FUSE_POR_M)
- programmed++;
- if (dm_i2c_read(dev, PFUZE100_FUSE_POR2, &val, 1) < 0) {
- puts("i2c fuse_por read failed\n");
- return programmed;
- }
- if (val & PFUZE100_FUSE_POR_M)
- programmed++;
- if (dm_i2c_read(dev, PFUZE100_FUSE_POR3, &val, 1) < 0) {
- puts("i2c fuse_por read failed\n");
- return programmed;
- }
- if (val & PFUZE100_FUSE_POR_M)
- programmed++;
- switch (programmed) {
- case 0:
- puts("not programmed\n");
- break;
- case 3:
- puts("programmed\n");
- break;
- default:
- puts("undefined programming state\n");
- break;
- }
- /* The following is needed during production */
- if (programmed != 3) {
- /* set VGEN1 to 1.2V */
- val = PFUZE100_VGEN1_VAL;
- if (dm_i2c_write(dev, PFUZE100_VGEN1CTL, &val, 1)) {
- puts("i2c write failed\n");
- return programmed;
- }
- /* set SWBST to 5.0V */
- val = PFUZE100_SWBST_VAL;
- if (dm_i2c_write(dev, PFUZE100_SWBSTCTL, &val, 1))
- puts("i2c write failed\n");
- }
- #ifdef DEBUG
- {
- unsigned int 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++) {
- dm_i2c_read(dev, j + i, &val, 1);
- printf("\t%2x", val);
- }
- j += 0x10;
- }
- printf("\nEXT Page 1");
- val = PFUZE100_PAGE_REGISTER_PAGE1;
- if (dm_i2c_write(dev, PFUZE100_PAGE_REGISTER, &val, 1)) {
- puts("i2c write failed\n");
- return 0;
- }
- for (j = 0x80; j < 0x100; ) {
- printf("\n%2x", j);
- for (i = 0; i < 16; i++) {
- dm_i2c_read(dev, j + i, &val, 1);
- printf("\t%2x", val);
- }
- j += 0x10;
- }
- printf("\nEXT Page 2");
- val = PFUZE100_PAGE_REGISTER_PAGE2;
- if (dm_i2c_write(dev, PFUZE100_PAGE_REGISTER, &val, 1)) {
- puts("i2c write failed\n");
- return 0;
- }
- for (j = 0x80; j < 0x100; ) {
- printf("\n%2x", j);
- for (i = 0; i < 16; i++) {
- dm_i2c_read(dev, j + i, &val, 1);
- printf("\t%2x", val);
- }
- j += 0x10;
- }
- printf("\n");
- }
- #endif /* DEBUG */
- return programmed;
- }
- #ifndef CONFIG_SPL_BUILD
- static int pf0100_prog(void)
- {
- int rc;
- struct udevice *dev = NULL;
- 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);
- rc = i2c_get_chip_for_busnum(bus, PFUZE100_I2C_ADDR, 1, &dev);
- if (rc) {
- printf("failed to get device for PMIC at address 0x%x\n",
- PFUZE100_I2C_ADDR);
- 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 (dm_i2c_write(dev, pmic_otp_prog[i].reg, &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 /* CONFIG_SPL_BUILD */
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