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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2014-2023 TQ-Systems GmbH <u-boot@ew.tq-group.com>,
* D-82229 Seefeld, Germany.
* Author: Markus Niebel
*/
#include <common.h>
#include <net.h>
#include <linux/ctype.h>
#include <crc.h>
#include <pbl/i2c.h>
#include <pbl/eeprom.h>
#include <boards/tq/tq_eeprom.h>
/*
* static EEPROM layout
*/
#define TQ_EE_HRCW_BYTES 0x20
#define TQ_EE_RSV1_BYTES 10
#define TQ_EE_RSV2_BYTES 8
struct __packed tq_eeprom_data {
union {
struct tq_vard vard;
_Static_assert(sizeof(struct tq_vard) == TQ_EE_HRCW_BYTES, \
"struct tq_vard has incorrect size");
u8 hrcw_primary[TQ_EE_HRCW_BYTES];
} tq_hw_data;
u8 mac[TQ_EE_MAC_BYTES]; /* 0x20 ... 0x25 */
u8 rsv1[TQ_EE_RSV1_BYTES];
u8 serial[TQ_EE_SERIAL_BYTES]; /* 0x30 ... 0x37 */
u8 rsv2[TQ_EE_RSV2_BYTES];
u8 id[TQ_EE_BDID_BYTES]; /* 0x40 ... 0x7f */
};
static bool tq_vard_valid(const struct tq_vard *vard)
{
const unsigned char *start = (const unsigned char *)(vard) +
sizeof(vard->crc);
u16 crc;
crc = crc_itu_t(0, start, sizeof(*vard) - sizeof(vard->crc));
return vard->crc == crc;
}
phys_size_t tq_vard_memsize(u8 val, unsigned int multiply, unsigned int tmask)
{
phys_size_t result = 0;
if (val != VARD_MEMSIZE_DEFAULT) {
result = 1 << (size_t)(val & VARD_MEMSIZE_MASK_EXP);
if (val & tmask)
result *= 3;
result *= multiply;
}
return result;
}
void tq_vard_show(const struct tq_vard *vard)
{
/* display data anyway to support developer */
printf("HW\tREV.%02uxx\n", (unsigned int)vard->hwrev);
printf("RAM\ttype %u, %lu MiB, %s\n",
(unsigned int)(vard->memtype & VARD_MEMTYPE_MASK_TYPE),
(unsigned long)(tq_vard_ramsize(vard) / (SZ_1M)),
(tq_vard_has_ramecc(vard) ? "ECC" : "no ECC"));
printf("RTC\t%c\nSPINOR\t%c\ne-MMC\t%c\nSE\t%c\nEEPROM\t%c\n",
(tq_vard_has_rtc(vard) ? 'y' : 'n'),
(tq_vard_has_spinor(vard) ? 'y' : 'n'),
(tq_vard_has_emmc(vard) ? 'y' : 'n'),
(tq_vard_has_secelem(vard) ? 'y' : 'n'),
(tq_vard_has_eeprom(vard) ? 'y' : 'n'));
if (tq_vard_has_eeprom(vard))
printf("EEPROM\ttype %u, %lu KiB, page %zu\n",
(unsigned int)(vard->eepromtype & VARD_EETYPE_MASK_MFR) >> 4,
(unsigned long)(tq_vard_eepromsize(vard) / (SZ_1K)),
tq_vard_eeprom_pgsize(vard));
printf("FORMFACTOR: ");
switch (tq_vard_get_formfactor(vard)) {
case VARD_FORMFACTOR_TYPE_LGA:
printf("LGA\n");
break;
case VARD_FORMFACTOR_TYPE_CONNECTOR:
printf("CONNECTOR\n");
break;
case VARD_FORMFACTOR_TYPE_SMARC2:
printf("SMARC-2\n");
break;
case VARD_FORMFACTOR_TYPE_NONE:
/*
* applies to boards with no variants or older boards
* where this field is not written
*/
printf("UNSPECIFIED\n");
break;
default:
/*
* generic fall trough
* unhandled form factor or invalid data
*/
printf("UNKNOWN\n");
break;
}
}
static void tq_read_string(const char *src, char *dst, int len)
{
int i;
for (i = 0; i < len && isprint(src[i]) && isascii(src[i]); ++i)
dst[i] = src[i];
dst[i] = '\0';
}
struct tq_eeprom *pbl_tq_read_eeprom(struct pbl_i2c *i2c, u8 addr, u32 eeprom_addr)
{
struct tq_eeprom_data raw;
static struct tq_eeprom eeprom;
int ret;
ret = eeprom_read(i2c, addr, eeprom_addr, &raw, sizeof(raw));
if (ret)
return NULL;
if (tq_vard_valid(&raw.tq_hw_data.vard))
eeprom.vard = raw.tq_hw_data.vard;
memcpy(eeprom.mac, raw.mac, TQ_EE_MAC_BYTES);
tq_read_string(raw.serial, eeprom.serial, TQ_EE_SERIAL_BYTES);
tq_read_string(raw.id, eeprom.id, TQ_EE_BDID_BYTES);
return &eeprom;
}
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