u-boot/board/gateworks/venice/eeprom.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2021 Gateworks Corporation
*/
#include <common.h>
#include <gsc.h>
#include <hexdump.h>
#include <i2c.h>
#include <dm/uclass.h>
#include "eeprom.h"
/* I2C */
#define SOM_EEPROM_BUSNO 0
#define SOM_EEPROM_ADDR 0x51
#define BASEBOARD_EEPROM_BUSNO 1
#define BASEBOARD_EEPROM_ADDR 0x52
struct venice_board_info som_info;
struct venice_board_info base_info;
char venice_model[32];
char venice_baseboard_model[32];
u32 venice_serial;
/* return a mac address from EEPROM info */
int eeprom_getmac(int index, uint8_t *address)
{
int i, j;
u32 maclow, machigh;
u64 mac;
j = 0;
if (som_info.macno) {
maclow = som_info.mac[5];
maclow |= som_info.mac[4] << 8;
maclow |= som_info.mac[3] << 16;
maclow |= som_info.mac[2] << 24;
machigh = som_info.mac[1];
machigh |= som_info.mac[0] << 8;
mac = machigh;
mac <<= 32;
mac |= maclow;
for (i = 0; i < som_info.macno; i++, j++) {
if (index == j)
goto out;
}
}
maclow = base_info.mac[5];
maclow |= base_info.mac[4] << 8;
maclow |= base_info.mac[3] << 16;
maclow |= base_info.mac[2] << 24;
machigh = base_info.mac[1];
machigh |= base_info.mac[0] << 8;
mac = machigh;
mac <<= 32;
mac |= maclow;
for (i = 0; i < base_info.macno; i++, j++) {
if (index == j)
goto out;
}
return -EINVAL;
out:
mac += i;
address[0] = (mac >> 40) & 0xff;
address[1] = (mac >> 32) & 0xff;
address[2] = (mac >> 24) & 0xff;
address[3] = (mac >> 16) & 0xff;
address[4] = (mac >> 8) & 0xff;
address[5] = (mac >> 0) & 0xff;
return 0;
}
static int eeprom_read(int busno, int slave, int alen, struct venice_board_info *info)
{
int i;
int chksum;
unsigned char *buf = (unsigned char *)info;
struct udevice *dev, *bus;
int ret;
/* probe device */
ret = uclass_get_device_by_seq(UCLASS_I2C, busno, &bus);
if (ret)
return ret;
ret = dm_i2c_probe(bus, slave, 0, &dev);
if (ret)
return ret;
/* read eeprom config section */
memset(info, 0, sizeof(*info));
ret = i2c_set_chip_offset_len(dev, alen);
if (ret) {
puts("EEPROM: Failed to set alen\n");
return ret;
}
ret = dm_i2c_read(dev, 0x00, buf, sizeof(*info));
if (ret) {
if (slave == SOM_EEPROM_ADDR)
printf("EEPROM: Failed to read EEPROM\n");
return ret;
}
/* validate checksum */
for (chksum = 0, i = 0; i < (int)sizeof(*info) - 2; i++)
chksum += buf[i];
if ((info->chksum[0] != chksum >> 8) ||
(info->chksum[1] != (chksum & 0xff))) {
printf("EEPROM: I2C%d@0x%02x: Invalid Checksum\n", busno, slave);
print_hex_dump_bytes("", DUMP_PREFIX_NONE, buf, sizeof(*info));
memset(info, 0, sizeof(*info));
return -EINVAL;
}
/* sanity check valid model */
if (info->model[0] != 'G' || info->model[1] != 'W') {
printf("EEPROM: I2C%d@0x%02x: Invalid Model in EEPROM\n", busno, slave);
print_hex_dump_bytes("", DUMP_PREFIX_NONE, buf, sizeof(*info));
memset(info, 0, sizeof(*info));
return -EINVAL;
}
return 0;
}
/* determine BOM revision from model */
int get_bom_rev(const char *str)
{
int rev_bom = 0;
int i;
for (i = strlen(str) - 1; i > 0; i--) {
if (str[i] == '-')
break;
if (str[i] >= '1' && str[i] <= '9') {
rev_bom = str[i] - '0';
break;
}
}
return rev_bom;
}
/* determine PCB revision from model */
char get_pcb_rev(const char *str)
{
char rev_pcb = 'A';
int i;
for (i = strlen(str) - 1; i > 0; i--) {
if (str[i] == '-')
break;
if (str[i] >= 'A') {
rev_pcb = str[i];
break;
}
}
return rev_pcb;
}
/*
* get dt name based on model and detail level:
*
* For boards that are a combination of a SoM plus a Baseboard:
* Venice SoM part numbers are GW70xx where xx is:
* 7000-7019: same PCB with som dt of '0x'
* 7020-7039: same PCB with som dt of '2x'
* 7040-7059: same PCB with som dt of '4x'
* 7060-7079: same PCB with som dt of '6x'
* 7080-7099: same PCB with som dt of '8x'
* Venice Baseboard part numbers are GW7xxx where xxx is:
* 7100-7199: same PCB with base dt of '71xx'
* 7200-7299: same PCB with base dt of '72xx'
* 7300-7399: same PCB with base dt of '73xx'
* 7400-7499: same PCB with base dt of '74xx'
* 7500-7599: same PCB with base dt of '75xx'
* 7600-7699: same PCB with base dt of '76xx'
* 7700-7799: same PCB with base dt of '77xx'
* 7800-7899: same PCB with base dt of '78xx'
* DT name is comprised of:
* gw<base dt>-<som dt>-[base-pcb-rev][base-bom-rev][som-pcb-rev][som-bom-rev]
*
* For board models from 7900-7999 each PCB is unique with its own dt:
* DT name is comprised:
* gw<model>-[pcb-rev][bom-rev]
*
*/
#define snprintfcat(dest, sz, fmt, ...) \
snprintf((dest) + strlen(dest), (sz) - strlen(dest), fmt, ##__VA_ARGS__)
const char *eeprom_get_dtb_name(int level, char *buf, int sz)
{
#ifdef CONFIG_IMX8MM
const char *pre = "imx8mm-venice-gw";
#elif CONFIG_IMX8MN
const char *pre = "imx8mn-venice-gw";
#elif CONFIG_IMX8MP
const char *pre = "imx8mp-venice-gw";
#endif
int model, rev_pcb, rev_bom;
model = ((som_info.model[2] - '0') * 1000)
+ ((som_info.model[3] - '0') * 100)
+ ((som_info.model[4] - '0') * 10)
+ (som_info.model[5] - '0');
rev_pcb = tolower(get_pcb_rev(som_info.model));
rev_bom = get_bom_rev(som_info.model);
/* som + baseboard*/
if (base_info.model[0]) {
/* baseboard id: 7100-7199->71; 7200-7299->72; etc */
int base = ((base_info.model[2] - '0') * 10) + (base_info.model[3] - '0');
/* som id: 7000-7019->1; 7020-7039->2; etc */
int som = ((model % 100) / 20) * 2;
int rev_base_pcb = tolower(get_pcb_rev(base_info.model));
int rev_base_bom = get_bom_rev(base_info.model);
snprintf(buf, sz, "%s%2dxx-%dx", pre, base, som);
/* GW79xx baseboards have no build options */
if (base == 79) {
base = (int)strtoul(base_info.model + 2, NULL, 10);
snprintf(buf, sz, "%s%4d-%dx", pre, base, som);
}
switch (level) {
case 0: /* full model (ie gw73xx-0x-a1a1) */
if (rev_base_bom)
snprintfcat(buf, sz, "-%c%d", rev_base_pcb, rev_base_bom);
else
snprintfcat(buf, sz, "-%c", rev_base_pcb);
if (rev_bom)
snprintfcat(buf, sz, "%c%d", rev_pcb, rev_bom);
else
snprintfcat(buf, sz, "%c", rev_pcb);
break;
case 1: /* don't care about SoM revision */
if (rev_base_bom)
snprintfcat(buf, sz, "-%c%d", rev_base_pcb, rev_base_bom);
else
snprintfcat(buf, sz, "-%c", rev_base_pcb);
snprintfcat(buf, sz, "xx");
break;
case 2: /* don't care about baseboard revision */
snprintfcat(buf, sz, "-xx");
if (rev_bom)
snprintfcat(buf, sz, "%c%d", rev_pcb, rev_bom);
else
snprintfcat(buf, sz, "%c", rev_pcb);
break;
case 3: /* don't care about SoM/baseboard revision */
break;
default:
return NULL;
}
} else {
snprintf(buf, sz, "%s%04d", pre, model);
switch (level) {
case 0: /* full model wth PCB and BOM revision first (ie gw7901-a1) */
if (rev_bom)
snprintfcat(buf, sz, "-%c%d", rev_pcb, rev_bom);
else
snprintfcat(buf, sz, "-%c", rev_pcb);
break;
case 1: /* don't care about BOM revision */
snprintfcat(buf, sz, "-%c", rev_pcb);
break;
case 2: /* don't care about PCB or BOM revision */
break;
case 3: /* don't care about last digit of model */
buf[strlen(buf) - 1] = 'x';
break;
case 4: /* don't care about last two digits of model */
buf[strlen(buf) - 1] = 'x';
buf[strlen(buf) - 2] = 'x';
break;
default:
return NULL;
break;
}
}
return buf;
}
static int eeprom_info(bool verbose)
{
printf("Model : %s\n", venice_model);
printf("Serial : %d\n", som_info.serial);
printf("MFGDate : %02x-%02x-%02x%02x\n",
som_info.mfgdate[0], som_info.mfgdate[1],
som_info.mfgdate[2], som_info.mfgdate[3]);
if (base_info.model[0] && verbose) {
printf("SOM : %s %d %02x-%02x-%02x%02x\n",
som_info.model, som_info.serial,
som_info.mfgdate[0], som_info.mfgdate[1],
som_info.mfgdate[2], som_info.mfgdate[3]);
printf("BASE : %s %d %02x-%02x-%02x%02x\n",
base_info.model, base_info.serial,
base_info.mfgdate[0], base_info.mfgdate[1],
base_info.mfgdate[2], base_info.mfgdate[3]);
}
return 0;
}
int venice_eeprom_init(int quiet)
{
char rev_pcb;
int rev_bom;
int ret;
ret = eeprom_read(SOM_EEPROM_BUSNO, SOM_EEPROM_ADDR, 1, &som_info);
if (ret) {
puts("ERROR: Failed to probe EEPROM\n");
memset(&som_info, 0, sizeof(som_info));
return 0;
}
/* read optional baseboard EEPROM */
eeprom_read(BASEBOARD_EEPROM_BUSNO, BASEBOARD_EEPROM_ADDR, 2, &base_info);
/* create model strings */
if (base_info.model[0]) {
sprintf(venice_model, "GW%c%c%c%c-%c%c-",
som_info.model[2], /* family */
base_info.model[3], /* baseboard */
base_info.model[4], base_info.model[5], /* subload of baseboard */
som_info.model[4], som_info.model[5]); /* last 2digits of SOM */
strlcpy(venice_baseboard_model, base_info.model, sizeof(venice_baseboard_model));
/* baseboard revision */
rev_pcb = get_pcb_rev(base_info.model);
rev_bom = get_bom_rev(base_info.model);
if (rev_bom)
sprintf(venice_model + strlen(venice_model), "%c%d", rev_pcb, rev_bom);
else
sprintf(venice_model + strlen(venice_model), "%c", rev_pcb);
/* som revision */
rev_pcb = get_pcb_rev(som_info.model);
rev_bom = get_bom_rev(som_info.model);
if (rev_bom)
sprintf(venice_model + strlen(venice_model), "%c%d", rev_pcb, rev_bom);
else
sprintf(venice_model + strlen(venice_model), "%c", rev_pcb);
} else {
strcpy(venice_model, som_info.model);
}
venice_serial = som_info.serial;
if (!quiet)
eeprom_info(false);
return (16 << som_info.sdram_size);
}
void board_gsc_info(void)
{
eeprom_info(true);
}
const char *eeprom_get_model(void)
{
return venice_model;
}
const char *eeprom_get_baseboard_model(void)
{
return venice_baseboard_model;
}
u32 eeprom_get_serial(void)
{
return venice_serial;
}