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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2014 - 2020 Xilinx, Inc.
* Michal Simek <michal.simek@xilinx.com>
*/
#include <common.h>
#include <env.h>
#include <log.h>
#include <asm/global_data.h>
#include <asm/sections.h>
#include <dm/uclass.h>
#include <i2c.h>
#include <linux/sizes.h>
#include <malloc.h>
#include "board.h"
#include <dm.h>
#include <i2c_eeprom.h>
#include <net.h>
#include <generated/dt.h>
#include <soc.h>
#include <linux/ctype.h>
#include "fru.h"
#if defined(CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET)
int zynq_board_read_rom_ethaddr(unsigned char *ethaddr)
{
int ret = -EINVAL;
struct udevice *dev;
ofnode eeprom;
eeprom = ofnode_get_chosen_node("xlnx,eeprom");
if (!ofnode_valid(eeprom))
return -ENODEV;
debug("%s: Path to EEPROM %s\n", __func__,
ofnode_read_chosen_string("xlnx,eeprom"));
ret = uclass_get_device_by_ofnode(UCLASS_I2C_EEPROM, eeprom, &dev);
if (ret)
return ret;
ret = dm_i2c_read(dev, CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET, ethaddr, 6);
if (ret)
debug("%s: I2C EEPROM MAC address read failed\n", __func__);
else
debug("%s: I2C EEPROM MAC %pM\n", __func__, ethaddr);
return ret;
}
#endif
#define EEPROM_HEADER_MAGIC 0xdaaddeed
#define EEPROM_HDR_MANUFACTURER_LEN 16
#define EEPROM_HDR_NAME_LEN 16
#define EEPROM_HDR_REV_LEN 8
#define EEPROM_HDR_SERIAL_LEN 20
#define EEPROM_HDR_NO_OF_MAC_ADDR 4
#define EEPROM_HDR_ETH_ALEN ETH_ALEN
struct xilinx_board_description {
u32 header;
char manufacturer[EEPROM_HDR_MANUFACTURER_LEN + 1];
char name[EEPROM_HDR_NAME_LEN + 1];
char revision[EEPROM_HDR_REV_LEN + 1];
char serial[EEPROM_HDR_SERIAL_LEN + 1];
u8 mac_addr[EEPROM_HDR_NO_OF_MAC_ADDR][EEPROM_HDR_ETH_ALEN + 1];
};
static int highest_id = -1;
static struct xilinx_board_description *board_info;
#define XILINX_I2C_DETECTION_BITS sizeof(struct fru_common_hdr)
/* Variable which stores pointer to array which stores eeprom content */
struct xilinx_legacy_format {
char board_sn[18]; /* 0x0 */
char unused0[14]; /* 0x12 */
char eth_mac[6]; /* 0x20 */
char unused1[170]; /* 0x26 */
char board_name[11]; /* 0xd0 */
char unused2[5]; /* 0xdc */
char board_revision[3]; /* 0xe0 */
char unused3[29]; /* 0xe3 */
};
static void xilinx_eeprom_legacy_cleanup(char *eeprom, int size)
{
int i;
char byte;
for (i = 0; i < size; i++) {
byte = eeprom[i];
/* Remove all ffs and spaces */
if (byte == 0xff || byte == ' ')
eeprom[i] = 0;
/* Convert strings to lower case */
if (byte >= 'A' && byte <= 'Z')
eeprom[i] = byte + 'a' - 'A';
}
}
static int xilinx_read_eeprom_legacy(struct udevice *dev, char *name,
struct xilinx_board_description *desc)
{
int ret, size;
struct xilinx_legacy_format *eeprom_content;
bool eth_valid = false;
size = sizeof(*eeprom_content);
eeprom_content = calloc(1, size);
if (!eeprom_content)
return -ENOMEM;
debug("%s: I2C EEPROM read pass data at %p\n", __func__,
eeprom_content);
ret = dm_i2c_read(dev, 0, (uchar *)eeprom_content, size);
if (ret) {
debug("%s: I2C EEPROM read failed\n", __func__);
free(eeprom_content);
return ret;
}
xilinx_eeprom_legacy_cleanup((char *)eeprom_content, size);
printf("Xilinx I2C Legacy format at %s:\n", name);
printf(" Board name:\t%s\n", eeprom_content->board_name);
printf(" Board rev:\t%s\n", eeprom_content->board_revision);
printf(" Board SN:\t%s\n", eeprom_content->board_sn);
eth_valid = is_valid_ethaddr((const u8 *)eeprom_content->eth_mac);
if (eth_valid)
printf(" Ethernet mac:\t%pM\n", eeprom_content->eth_mac);
/* Terminating \0 chars ensure end of string */
strcpy(desc->name, eeprom_content->board_name);
strcpy(desc->revision, eeprom_content->board_revision);
strcpy(desc->serial, eeprom_content->board_sn);
if (eth_valid)
memcpy(desc->mac_addr[0], eeprom_content->eth_mac, ETH_ALEN);
desc->header = EEPROM_HEADER_MAGIC;
free(eeprom_content);
return ret;
}
static bool xilinx_detect_legacy(u8 *buffer)
{
int i;
char c;
for (i = 0; i < XILINX_I2C_DETECTION_BITS; i++) {
c = buffer[i];
if (c < '0' || c > '9')
return false;
}
return true;
}
static int xilinx_read_eeprom_fru(struct udevice *dev, char *name,
struct xilinx_board_description *desc)
{
int i, ret, eeprom_size;
u8 *fru_content;
/* FIXME this is shortcut - if eeprom type is wrong it will fail */
eeprom_size = i2c_eeprom_size(dev);
fru_content = calloc(1, eeprom_size);
if (!fru_content)
return -ENOMEM;
debug("%s: I2C EEPROM read pass data at %p\n", __func__,
fru_content);
ret = dm_i2c_read(dev, 0, (uchar *)fru_content,
eeprom_size);
if (ret) {
debug("%s: I2C EEPROM read failed\n", __func__);
goto end;
}
fru_capture((unsigned long)fru_content);
if (gd->flags & GD_FLG_RELOC || (_DEBUG && CONFIG_IS_ENABLED(DTB_RESELECT))) {
printf("Xilinx I2C FRU format at %s:\n", name);
ret = fru_display(0);
if (ret) {
printf("FRU format decoding failed.\n");
goto end;
}
}
if (desc->header == EEPROM_HEADER_MAGIC) {
debug("Information already filled\n");
ret = -EINVAL;
goto end;
}
/* It is clear that FRU was captured and structures were filled */
strncpy(desc->manufacturer, (char *)fru_data.brd.manufacturer_name,
sizeof(desc->manufacturer));
strncpy(desc->name, (char *)fru_data.brd.product_name,
sizeof(desc->name));
for (i = 0; i < sizeof(desc->name); i++) {
if (desc->name[i] == ' ')
desc->name[i] = '\0';
}
strncpy(desc->revision, (char *)fru_data.brd.rev,
sizeof(desc->revision));
strncpy(desc->serial, (char *)fru_data.brd.serial_number,
sizeof(desc->serial));
desc->header = EEPROM_HEADER_MAGIC;
end:
free(fru_content);
return ret;
}
static bool xilinx_detect_fru(u8 *buffer)
{
u8 checksum = 0;
int i;
checksum = fru_checksum((u8 *)buffer, sizeof(struct fru_common_hdr));
if (checksum) {
debug("%s Common header CRC FAIL\n", __func__);
return false;
}
bool all_zeros = true;
/* Checksum over all zeros is also zero that's why detect this case */
for (i = 0; i < sizeof(struct fru_common_hdr); i++) {
if (buffer[i] != 0)
all_zeros = false;
}
if (all_zeros)
return false;
debug("%s Common header CRC PASS\n", __func__);
return true;
}
static int xilinx_read_eeprom_single(char *name,
struct xilinx_board_description *desc)
{
int ret;
struct udevice *dev;
ofnode eeprom;
u8 buffer[XILINX_I2C_DETECTION_BITS];
eeprom = ofnode_get_aliases_node(name);
if (!ofnode_valid(eeprom))
return -ENODEV;
ret = uclass_get_device_by_ofnode(UCLASS_I2C_EEPROM, eeprom, &dev);
if (ret)
return ret;
ret = dm_i2c_read(dev, 0, buffer, sizeof(buffer));
if (ret) {
debug("%s: I2C EEPROM read failed\n", __func__);
return ret;
}
debug("%s: i2c memory detected: %s\n", __func__, name);
if (CONFIG_IS_ENABLED(CMD_FRU) && xilinx_detect_fru(buffer))
return xilinx_read_eeprom_fru(dev, name, desc);
if (xilinx_detect_legacy(buffer))
return xilinx_read_eeprom_legacy(dev, name, desc);
return -ENODEV;
}
__maybe_unused int xilinx_read_eeprom(void)
{
int id;
char name_buf[8]; /* 8 bytes should be enough for nvmem+number */
struct xilinx_board_description *desc;
highest_id = dev_read_alias_highest_id("nvmem");
/* No nvmem aliases present */
if (highest_id < 0)
return -EINVAL;
board_info = calloc(1, sizeof(*desc) * (highest_id + 1));
if (!board_info)
return -ENOMEM;
debug("%s: Highest ID %d, board_info %p\n", __func__,
highest_id, board_info);
for (id = 0; id <= highest_id; id++) {
snprintf(name_buf, sizeof(name_buf), "nvmem%d", id);
/* Alloc structure */
desc = &board_info[id];
/* Ignoring return value for supporting multiple chips */
xilinx_read_eeprom_single(name_buf, desc);
}
/*
* Consider to clean board_info structure when board/cards are not
* detected.
*/
return 0;
}
#if defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE)
void *board_fdt_blob_setup(int *err)
{
void *fdt_blob;
*err = 0;
if (!IS_ENABLED(CONFIG_SPL_BUILD) &&
!IS_ENABLED(CONFIG_VERSAL_NO_DDR) &&
!IS_ENABLED(CONFIG_ZYNQMP_NO_DDR)) {
fdt_blob = (void *)CONFIG_XILINX_OF_BOARD_DTB_ADDR;
if (fdt_magic(fdt_blob) == FDT_MAGIC)
return fdt_blob;
debug("DTB is not passed via %p\n", fdt_blob);
}
if (IS_ENABLED(CONFIG_SPL_BUILD)) {
/*
* FDT is at end of BSS unless it is in a different memory
* region
*/
if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
fdt_blob = (ulong *)&_image_binary_end;
else
fdt_blob = (ulong *)&__bss_end;
} else {
/* FDT is at end of image */
fdt_blob = (ulong *)&_end;
}
if (fdt_magic(fdt_blob) == FDT_MAGIC)
return fdt_blob;
debug("DTB is also not passed via %p\n", fdt_blob);
return NULL;
}
#endif
#if defined(CONFIG_BOARD_LATE_INIT)
static int env_set_by_index(const char *name, int index, char *data)
{
char var[32];
if (!index)
sprintf(var, "board_%s", name);
else
sprintf(var, "card%d_%s", index, name);
return env_set(var, data);
}
int board_late_init_xilinx(void)
{
u32 ret = 0;
int i, id, macid = 0;
struct xilinx_board_description *desc;
phys_size_t bootm_size = gd->ram_size;
if (!CONFIG_IS_ENABLED(MICROBLAZE)) {
ulong scriptaddr;
scriptaddr = env_get_hex("scriptaddr", 0);
ret |= env_set_hex("scriptaddr", gd->ram_base + scriptaddr);
}
if (CONFIG_IS_ENABLED(ARCH_ZYNQ) || CONFIG_IS_ENABLED(MICROBLAZE))
bootm_size = min(bootm_size, (phys_size_t)(SZ_512M + SZ_256M));
ret |= env_set_hex("script_offset_f", CONFIG_BOOT_SCRIPT_OFFSET);
ret |= env_set_addr("bootm_low", (void *)gd->ram_base);
ret |= env_set_addr("bootm_size", (void *)bootm_size);
for (id = 0; id <= highest_id; id++) {
desc = &board_info[id];
if (desc && desc->header == EEPROM_HEADER_MAGIC) {
if (desc->manufacturer[0])
ret |= env_set_by_index("manufacturer", id,
desc->manufacturer);
if (desc->name[0])
ret |= env_set_by_index("name", id,
desc->name);
if (desc->revision[0])
ret |= env_set_by_index("rev", id,
desc->revision);
if (desc->serial[0])
ret |= env_set_by_index("serial", id,
desc->serial);
if (!CONFIG_IS_ENABLED(NET))
continue;
for (i = 0; i < EEPROM_HDR_NO_OF_MAC_ADDR; i++) {
if (!desc->mac_addr[i])
continue;
if (is_valid_ethaddr((const u8 *)desc->mac_addr[i]))
ret |= eth_env_set_enetaddr_by_index("eth",
macid++, desc->mac_addr[i]);
}
}
}
if (ret)
printf("%s: Saving run time variables FAILED\n", __func__);
return 0;
}
#endif
static char *board_name = DEVICE_TREE;
int __maybe_unused board_fit_config_name_match(const char *name)
{
debug("%s: Check %s, default %s\n", __func__, name, board_name);
if (!strcmp(name, board_name))
return 0;
return -1;
}
#if defined(CONFIG_DISPLAY_CPUINFO) && !defined(CONFIG_ARCH_ZYNQ)
int print_cpuinfo(void)
{
struct udevice *soc;
char name[SOC_MAX_STR_SIZE];
int ret;
ret = soc_get(&soc);
if (ret) {
printf("CPU: UNKNOWN\n");
return 0;
}
ret = soc_get_family(soc, name, SOC_MAX_STR_SIZE);
if (ret)
printf("CPU: %s\n", name);
ret = soc_get_revision(soc, name, SOC_MAX_STR_SIZE);
if (ret)
printf("Silicon: %s\n", name);
return 0;
}
#endif
#if CONFIG_IS_ENABLED(DTB_RESELECT)
#define MAX_NAME_LENGTH 50
char * __maybe_unused __weak board_name_decode(void)
{
char *board_local_name;
struct xilinx_board_description *desc;
int i, id;
board_local_name = calloc(1, MAX_NAME_LENGTH);
if (!board_info)
return NULL;
for (id = 0; id <= highest_id; id++) {
desc = &board_info[id];
/* No board description */
if (!desc)
goto error;
/* Board is not detected */
if (desc->header != EEPROM_HEADER_MAGIC)
continue;
/* The first string should be soc name */
if (!id)
strcat(board_local_name, CONFIG_SYS_BOARD);
/*
* For two purpose here:
* soc_name- eg: zynqmp-
* and between base board and CC eg: ..revA-sck...
*/
strcat(board_local_name, "-");
if (desc->name[0]) {
/* For DT composition name needs to be lowercase */
for (i = 0; i < sizeof(desc->name); i++)
desc->name[i] = tolower(desc->name[i]);
strcat(board_local_name, desc->name);
}
if (desc->revision[0]) {
strcat(board_local_name, "-rev");
/* And revision needs to be uppercase */
for (i = 0; i < sizeof(desc->revision); i++)
desc->revision[i] = toupper(desc->revision[i]);
strcat(board_local_name, desc->revision);
}
}
/*
* Longer strings will end up with buffer overflow and potential
* attacks that's why check it
*/
if (strlen(board_local_name) >= MAX_NAME_LENGTH)
panic("Board name can't be determined\n");
if (strlen(board_local_name))
return board_local_name;
error:
free(board_local_name);
return NULL;
}
bool __maybe_unused __weak board_detection(void)
{
if (CONFIG_IS_ENABLED(DM_I2C) && CONFIG_IS_ENABLED(I2C_EEPROM)) {
int ret;
ret = xilinx_read_eeprom();
return !ret ? true : false;
}
return false;
}
int embedded_dtb_select(void)
{
if (board_detection()) {
char *board_local_name;
board_local_name = board_name_decode();
if (board_local_name) {
board_name = board_local_name;
printf("Detected name: %s\n", board_name);
/* Time to change DTB on fly */
/* Both ways should work here */
/* fdtdec_resetup(&rescan); */
fdtdec_setup();
}
}
return 0;
}
#endif