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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2014 Gateworks Corporation
* Author: Tim Harvey <tharvey@gateworks.com>
*/
#include <command.h>
#include <common.h>
#include <gsc.h>
#include <hexdump.h>
#include <i2c.h>
#include <asm/arch/sys_proto.h>
#include <dm/device.h>
#include <dm/uclass.h>
#include <linux/ctype.h>
#include <linux/delay.h>
#include "eeprom.h"
/*
* EEPROM board info struct populated by read_eeprom so that we only have to
* read it once.
*/
struct ventana_board_info ventana_info;
int board_type;
#if CONFIG_IS_ENABLED(DM_I2C)
struct udevice *i2c_get_dev(int busno, int slave)
{
struct udevice *dev, *bus;
int ret;
ret = uclass_get_device_by_seq(UCLASS_I2C, busno, &bus);
if (ret)
return NULL;
ret = dm_i2c_probe(bus, slave, 0, &dev);
if (ret)
return NULL;
return dev;
}
#endif
/*
* The Gateworks System Controller will fail to ACK a master transaction if
* it is busy, which can occur during its 1HZ timer tick while reading ADC's.
* When this does occur, it will never be busy long enough to fail more than
* 2 back-to-back transfers. Thus we wrap i2c_read and i2c_write with
* 3 retries.
*/
int gsc_i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len)
{
int retry = 3;
int n = 0;
int ret;
#if CONFIG_IS_ENABLED(DM_I2C)
struct udevice *dev;
dev = i2c_get_dev(BOARD_EEPROM_BUSNO, chip);
if (!dev)
return -ENODEV;
ret = i2c_set_chip_offset_len(dev, alen);
if (ret) {
puts("EEPROM: Failed to set alen\n");
return ret;
}
#else
i2c_set_bus_num(BOARD_EEPROM_BUSNO);
#endif
while (n++ < retry) {
#if CONFIG_IS_ENABLED(DM_I2C)
ret = dm_i2c_read(dev, addr, buf, len);
#else
ret = i2c_read(chip, addr, alen, buf, len);
#endif
if (!ret)
break;
debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr,
n, ret);
if (ret != -ENODEV)
break;
mdelay(10);
}
return ret;
}
int gsc_i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len)
{
int retry = 3;
int n = 0;
int ret;
#if CONFIG_IS_ENABLED(DM_I2C)
struct udevice *dev;
dev = i2c_get_dev(BOARD_EEPROM_BUSNO, chip);
if (!dev)
return -ENODEV;
ret = i2c_set_chip_offset_len(dev, alen);
if (ret) {
puts("EEPROM: Failed to set alen\n");
return ret;
}
#endif
while (n++ < retry) {
#if CONFIG_IS_ENABLED(DM_I2C)
ret = dm_i2c_write(dev, addr, buf, len);
#else
ret = i2c_write(chip, addr, alen, buf, len);
#endif
if (!ret)
break;
debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr,
n, ret);
if (ret != -ENODEV)
break;
mdelay(10);
}
mdelay(100);
return ret;
}
/* 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:
*/
const char *gsc_get_dtb_name(int level, char *buf, int sz)
{
const char *model = (const char *)ventana_info.model;
const char *pre = is_mx6dq() ? "imx6q-" : "imx6dl-";
int modelno, rev_pcb, rev_bom;
/* a few board models are dt equivalents to other models */
if (strncasecmp(model, "gw5906", 6) == 0)
model = "gw552x-d";
else if (strncasecmp(model, "gw5908", 6) == 0)
model = "gw53xx-f";
else if (strncasecmp(model, "gw5905", 6) == 0)
model = "gw5904-a";
modelno = ((model[2] - '0') * 1000)
+ ((model[3] - '0') * 100)
+ ((model[4] - '0') * 10)
+ (model[5] - '0');
rev_pcb = tolower(get_pcb_rev(model));
rev_bom = get_bom_rev(model);
/* compare model/rev/bom in order of most specific to least */
snprintf(buf, sz, "%s%04d", pre, modelno);
switch (level) {
case 0: /* full model first (ie gw5400-a1) */
if (rev_bom) {
snprintf(buf, sz, "%sgw%04d-%c%d", pre, modelno, rev_pcb, rev_bom);
break;
}
fallthrough;
case 1: /* don't care about bom rev (ie gw5400-a) */
snprintf(buf, sz, "%sgw%04d-%c", pre, modelno, rev_pcb);
break;
case 2: /* don't care about the pcb rev (ie gw5400) */
snprintf(buf, sz, "%sgw%04d", pre, modelno);
break;
case 3: /* look for generic model (ie gw540x) */
snprintf(buf, sz, "%sgw%03dx", pre, modelno / 10);
break;
case 4: /* look for more generic model (ie gw54xx) */
snprintf(buf, sz, "%sgw%02dxx", pre, modelno / 100);
break;
default: /* give up */
return NULL;
}
return buf;
}
/* read ventana EEPROM, check for validity, and return baseboard type */
int
read_eeprom(struct ventana_board_info *info)
{
int i;
int chksum;
char baseboard;
int type;
unsigned char *buf = (unsigned char *)info;
memset(info, 0, sizeof(*info));
/* read eeprom config section */
if (gsc_i2c_read(BOARD_EEPROM_ADDR, 0x00, 1, buf, sizeof(*info))) {
puts("EEPROM: Failed to read EEPROM\n");
return GW_UNKNOWN;
}
/* sanity checks */
if (info->model[0] != 'G' || info->model[1] != 'W') {
puts("EEPROM: Invalid Model in EEPROM\n");
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf,
sizeof(*info));
return GW_UNKNOWN;
}
/* validate checksum */
for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
chksum += buf[i];
if ((info->chksum[0] != chksum>>8) ||
(info->chksum[1] != (chksum&0xff))) {
puts("EEPROM: Failed EEPROM checksum\n");
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf,
sizeof(*info));
return GW_UNKNOWN;
}
/* original GW5400-A prototype */
baseboard = info->model[3];
if (strncasecmp((const char *)info->model, "GW5400-A", 8) == 0)
baseboard = '0';
type = GW_UNKNOWN;
switch (baseboard) {
case '0': /* original GW5400-A prototype */
type = GW54proto;
break;
case '1':
type = GW51xx;
break;
case '2':
type = GW52xx;
break;
case '3':
type = GW53xx;
break;
case '4':
type = GW54xx;
break;
case '5':
if (info->model[4] == '1') {
type = GW551x;
break;
} else if (info->model[4] == '2') {
type = GW552x;
break;
} else if (info->model[4] == '3') {
type = GW553x;
break;
}
break;
case '6':
if (info->model[4] == '0')
type = GW560x;
break;
case '9':
if (info->model[4] == '0' && info->model[5] == '1')
type = GW5901;
else if (info->model[4] == '0' && info->model[5] == '2')
type = GW5902;
else if (info->model[4] == '0' && info->model[5] == '3')
type = GW5903;
else if (info->model[4] == '0' && info->model[5] == '4')
type = GW5904;
else if (info->model[4] == '0' && info->model[5] == '5')
type = GW5905;
else if (info->model[4] == '0' && info->model[5] == '6')
type = GW5906;
else if (info->model[4] == '0' && info->model[5] == '7')
type = GW5907;
else if (info->model[4] == '0' && info->model[5] == '8')
type = GW5908;
else if (info->model[4] == '0' && info->model[5] == '9')
type = GW5909;
else if (info->model[4] == '1' && info->model[5] == '0')
type = GW5910;
else if (info->model[4] == '1' && info->model[5] == '2')
type = GW5912;
else if (info->model[4] == '1' && info->model[5] == '3')
type = GW5913;
break;
default:
printf("EEPROM: Unknown model in EEPROM: %s\n", info->model);
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf,
sizeof(*info));
break;
}
return type;
}
/* list of config bits that the bootloader will remove from dtb if not set */
struct ventana_eeprom_config econfig[] = {
{ "eth0", "ethernet0", EECONFIG_ETH0 },
{ "usb0", NULL, EECONFIG_USB0 },
{ "usb1", NULL, EECONFIG_USB1 },
{ "mmc0", NULL, EECONFIG_SD0 },
{ "mmc1", NULL, EECONFIG_SD1 },
{ "mmc2", NULL, EECONFIG_SD2 },
{ "mmc3", NULL, EECONFIG_SD3 },
{ /* Sentinel */ }
};
#if defined(CONFIG_CMD_EECONFIG) && !defined(CONFIG_SPL_BUILD)
static struct ventana_eeprom_config *get_config(const char *name)
{
struct ventana_eeprom_config *cfg = econfig;
while (cfg->name) {
if (0 == strcmp(name, cfg->name))
return cfg;
cfg++;
}
return NULL;
}
static u8 econfig_bytes[sizeof(ventana_info.config)];
static int econfig_init = -1;
static int do_econfig(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct ventana_eeprom_config *cfg;
struct ventana_board_info *info = &ventana_info;
int i;
if (argc < 2)
return CMD_RET_USAGE;
/* initialize */
if (econfig_init != 1) {
memcpy(econfig_bytes, info->config, sizeof(econfig_bytes));
econfig_init = 1;
}
/* list configs */
if ((strncmp(argv[1], "list", 4) == 0)) {
cfg = econfig;
while (cfg->name) {
printf("%s: %d\n", cfg->name,
test_bit(cfg->bit, econfig_bytes) ? 1 : 0);
cfg++;
}
}
/* save */
else if ((strncmp(argv[1], "save", 4) == 0)) {
unsigned char *buf = (unsigned char *)info;
int chksum;
/* calculate new checksum */
memcpy(info->config, econfig_bytes, sizeof(econfig_bytes));
for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
chksum += buf[i];
debug("old chksum:0x%04x\n",
(info->chksum[0] << 8) | info->chksum[1]);
debug("new chksum:0x%04x\n", chksum);
info->chksum[0] = chksum >> 8;
info->chksum[1] = chksum & 0xff;
/* write new config data */
if (gsc_i2c_write(BOARD_EEPROM_ADDR, info->config - (u8 *)info,
1, econfig_bytes, sizeof(econfig_bytes))) {
printf("EEPROM: Failed updating config\n");
return CMD_RET_FAILURE;
}
/* write new config data */
if (gsc_i2c_write(BOARD_EEPROM_ADDR, info->chksum - (u8 *)info,
1, info->chksum, 2)) {
printf("EEPROM: Failed updating checksum\n");
return CMD_RET_FAILURE;
}
printf("Config saved to EEPROM\n");
}
/* get config */
else if (argc == 2) {
cfg = get_config(argv[1]);
if (cfg) {
printf("%s: %d\n", cfg->name,
test_bit(cfg->bit, econfig_bytes) ? 1 : 0);
} else {
printf("invalid config: %s\n", argv[1]);
return CMD_RET_FAILURE;
}
}
/* set config */
else if (argc == 3) {
cfg = get_config(argv[1]);
if (cfg) {
if (simple_strtol(argv[2], NULL, 10)) {
test_and_set_bit(cfg->bit, econfig_bytes);
printf("Enabled %s\n", cfg->name);
} else {
test_and_clear_bit(cfg->bit, econfig_bytes);
printf("Disabled %s\n", cfg->name);
}
} else {
printf("invalid config: %s\n", argv[1]);
return CMD_RET_FAILURE;
}
}
else
return CMD_RET_USAGE;
return CMD_RET_SUCCESS;
}
U_BOOT_CMD(
econfig, 3, 0, do_econfig,
"EEPROM configuration",
"list - list config\n"
"save - save config to EEPROM\n"
"<name> - get config 'name'\n"
"<name> [0|1] - set config 'name' to value\n"
);
#endif /* CONFIG_CMD_EECONFIG */