u-boot/board/toradex/apalis_imx6/pf0100.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

230 lines
5.1 KiB
C

// 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