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/*
* Copyright (C) 2014 Gateworks Corporation
* Author: Tim Harvey <tharvey@gateworks.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <errno.h>
#include <i2c.h>
#include <malloc.h>
#include <asm/bitops.h>
#include "gsc.h"
#include "ventana_eeprom.h"
/* read ventana EEPROM, check for validity, and return baseboard type */
int
read_eeprom(int bus, struct ventana_board_info *info)
{
int i;
int chksum;
char baseboard;
int type;
unsigned char *buf = (unsigned char *)info;
memset(info, 0, sizeof(*info));
/*
* On a board with a missing/depleted backup battery for GSC, the
* board may be ready to probe the GSC before its firmware is
* running. We will wait here indefinately for the GSC/EEPROM.
*/
while (1) {
if (0 == i2c_set_bus_num(bus) &&
0 == i2c_probe(GSC_EEPROM_ADDR))
break;
mdelay(1);
}
/* read eeprom config section */
if (gsc_i2c_read(GSC_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");
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");
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] == '3')
type = GW5903;
if (info->model[4] == '0' && info->model[5] == '4')
type = GW5904;
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 */ }
};
#ifdef CONFIG_CMD_EECONFIG
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;
int do_econfig(cmd_tbl_t *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(GSC_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(GSC_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 */
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