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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <types.h>
#include <string.h>
#include <device/device.h>
#include <device/smbus.h>
#include <smbios.h>
#include <console/console.h>
#include <version.h>
#include "lenovo.h"
#define ERROR_STRING "*INVALID*"
static struct device *at24rf08c_find_bank(u8 bank)
{
struct device *dev;
dev = dev_find_slot_on_smbus(1, 0x54 | bank);
if (!dev)
printk(BIOS_WARNING, "EEPROM not found\n");
return dev;
}
static int at24rf08c_read_byte(struct device *dev, u8 addr)
{
int t = -1;
int j;
/* After a register write AT24RF08C (which we issued in init function)
sometimes stops responding. Retry several times in case of failure.
*/
for (j = 0; j < 100; j++) {
t = smbus_read_byte(dev, addr);
if (t >= 0)
return t;
}
return t;
}
static void at24rf08c_read_string_dev(struct device *dev, u8 start,
u8 len, char *result)
{
int i;
for (i = 0; i < len; i++) {
int t = at24rf08c_read_byte(dev, start + i);
if (t < 0x20 || t > 0x7f) {
memcpy(result, ERROR_STRING, sizeof (ERROR_STRING));
return;
}
result[i] = t;
}
result[len] = '\0';
}
static void at24rf08c_read_string(u8 bank, u8 start, u8 len, char *result)
{
struct device *dev;
dev = at24rf08c_find_bank(bank);
if (dev == NULL) {
printk(BIOS_WARNING, "EEPROM not found\n");
memcpy(result, ERROR_STRING, sizeof (ERROR_STRING));
return;
}
at24rf08c_read_string_dev(dev, start, len, result);
}
const char *smbios_mainboard_serial_number(void)
{
static char result[12];
static int already_read;
if (already_read)
return result;
memset(result, 0, sizeof (result));
at24rf08c_read_string(0, 0x2e, 7, result);
already_read = 1;
return result;
}
const char *lenovo_mainboard_partnumber(void)
{
static char result[12];
static int already_read;
if (already_read)
return result;
memset(result, 0, sizeof (result));
at24rf08c_read_string(0, 0x27, 7, result);
already_read = 1;
return result;
}
const char *smbios_mainboard_product_name(void)
{
return lenovo_mainboard_partnumber();
}
void smbios_system_set_uuid(u8 *uuid)
{
static char result[16];
unsigned int i;
static int already_read;
struct device *dev;
const int remap[16] = {
/* UUID byteswap. */
3, 2, 1, 0, 5, 4, 7, 6, 8, 9, 10, 11, 12, 13, 14, 15
};
if (already_read) {
memcpy(uuid, result, 16);
return;
}
memset(result, 0, sizeof (result));
dev = dev_find_slot_on_smbus(1, 0x56);
if (dev == NULL) {
printk(BIOS_WARNING, "EEPROM not found\n");
already_read = 1;
memset(uuid, 0, 16);
return;
}
for (i = 0; i < 16; i++) {
int t;
int j;
/* After a register write AT24RF08C (which we issued in init function) sometimes stops responding.
Retry several times in case of failure.
*/
for (j = 0; j < 100; j++) {
t = smbus_read_byte(dev, 0x12 + i);
if (t >= 0)
break;
}
if (t < 0) {
memset(result, 0, sizeof (result));
break;
}
result[remap[i]] = t;
}
already_read = 1;
memcpy(uuid, result, 16);
}
const char *smbios_mainboard_version(void)
{
static char result[100];
static int already_read;
struct device *dev;
int len;
if (already_read)
return result;
memset(result, 0, sizeof (result));
dev = at24rf08c_find_bank(2);
if (dev == NULL) {
memcpy(result, ERROR_STRING, sizeof (ERROR_STRING));
return result;
}
len = at24rf08c_read_byte(dev, 0x26) - 2;
if (len < 0 || len > sizeof(result) - 1) {
memcpy(result, ERROR_STRING, sizeof (ERROR_STRING));
return result;
}
at24rf08c_read_string_dev(dev, 0x27, len, result);
already_read = 1;
return result;
}
const char *smbios_mainboard_bios_version(void)
{
static char *s = NULL;
/* Satisfy thinkpad_acpi. */
if (strlen(CONFIG_LOCALVERSION))
return "CBET4000 " CONFIG_LOCALVERSION;
if (s != NULL)
return s;
s = strconcat("CBET4000 ", coreboot_version);
return s;
}
const char *smbios_mainboard_manufacturer(void)
{
return "LENOVO";
}
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