u-boot/board/ti/j721s2/evm.c
Kishon Vijay Abraham I 7bf341ae4d board: ti: j721s2: Add support to detect daughtercards
Add support to detect daughtercards (GESI Ethernet card) in-order
to set the MAC address of the main CPSW2G interface.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
2023-05-03 09:05:24 -04:00

322 lines
7.6 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Board specific initialization for J721S2 EVM
*
* Copyright (C) 2021 Texas Instruments Incorporated - http://www.ti.com/
* David Huang <d-huang@ti.com>
*
*/
#include <common.h>
#include <env.h>
#include <fdt_support.h>
#include <generic-phy.h>
#include <image.h>
#include <init.h>
#include <log.h>
#include <net.h>
#include <asm/arch/hardware.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <spl.h>
#include <dm.h>
#include <dm/uclass-internal.h>
#include <dm/root.h>
#include "../common/board_detect.h"
DECLARE_GLOBAL_DATA_PTR;
int board_init(void)
{
return 0;
}
int dram_init(void)
{
#ifdef CONFIG_PHYS_64BIT
gd->ram_size = 0x100000000;
#else
gd->ram_size = 0x80000000;
#endif
return 0;
}
phys_size_t board_get_usable_ram_top(phys_size_t total_size)
{
#ifdef CONFIG_PHYS_64BIT
/* Limit RAM used by U-Boot to the DDR low region */
if (gd->ram_top > 0x100000000)
return 0x100000000;
#endif
return gd->ram_top;
}
int dram_init_banksize(void)
{
/* Bank 0 declares the memory available in the DDR low region */
gd->bd->bi_dram[0].start = CFG_SYS_SDRAM_BASE;
gd->bd->bi_dram[0].size = 0x7fffffff;
gd->ram_size = 0x80000000;
#ifdef CONFIG_PHYS_64BIT
/* Bank 1 declares the memory available in the DDR high region */
gd->bd->bi_dram[1].start = CFG_SYS_SDRAM_BASE1;
gd->bd->bi_dram[1].size = 0x37fffffff;
gd->ram_size = 0x400000000;
#endif
return 0;
}
#ifdef CONFIG_TI_I2C_BOARD_DETECT
/*
* Functions specific to EVM and SK designs of J721S2/AM68 family.
*/
#define board_is_j721s2_som() board_ti_k3_is("J721S2X-PM1-SOM")
#define board_is_am68_sk_som() board_ti_k3_is("AM68-SK-SOM")
int do_board_detect(void)
{
int ret;
if (board_ti_was_eeprom_read())
return 0;
ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
CONFIG_EEPROM_CHIP_ADDRESS);
if (ret) {
printf("EEPROM not available at 0x%02x, trying to read at 0x%02x\n",
CONFIG_EEPROM_CHIP_ADDRESS, CONFIG_EEPROM_CHIP_ADDRESS + 1);
ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
CONFIG_EEPROM_CHIP_ADDRESS + 1);
if (ret)
pr_err("Reading on-board EEPROM at 0x%02x failed %d\n",
CONFIG_EEPROM_CHIP_ADDRESS + 1, ret);
}
return ret;
}
int checkboard(void)
{
struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
if (do_board_detect())
/* EEPROM not populated */
printf("Board: %s rev %s\n", "J721S2X-PM1-SOM", "E1");
else
printf("Board: %s rev %s\n", ep->name, ep->version);
return 0;
}
static void setup_board_eeprom_env(void)
{
char *name = "j721s2";
if (do_board_detect())
goto invalid_eeprom;
if (board_is_j721s2_som())
name = "j721s2";
else if (board_is_am68_sk_som())
name = "am68-sk";
else
printf("Unidentified board claims %s in eeprom header\n",
board_ti_get_name());
invalid_eeprom:
set_board_info_env_am6(name);
}
static void setup_serial(void)
{
struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
unsigned long board_serial;
char *endp;
char serial_string[17] = { 0 };
if (env_get("serial#"))
return;
board_serial = simple_strtoul(ep->serial, &endp, 16);
if (*endp != '\0') {
pr_err("Error: Can't set serial# to %s\n", ep->serial);
return;
}
snprintf(serial_string, sizeof(serial_string), "%016lx", board_serial);
env_set("serial#", serial_string);
}
/*
* Declaration of daughtercards to probe. Note that when adding more
* cards they should be grouped by the 'i2c_addr' field to allow for a
* more efficient probing process.
*/
static const struct {
u8 i2c_addr; /* I2C address of card EEPROM */
char *card_name; /* EEPROM-programmed card name */
char *dtbo_name; /* Device tree overlay to apply */
u8 eth_offset; /* ethXaddr MAC address index offset */
} ext_cards[] = {
{
0x52,
"J7X-GESI-EXP",
"k3-j721s2-gesi-exp-board.dtbo",
1, /* Start populating from eth1addr */
},
};
#define DAUGHTER_CARD_NO_OF_MAC_ADDR 5
static bool daughter_card_detect_flags[ARRAY_SIZE(ext_cards)];
static int probe_daughtercards(void)
{
char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
bool eeprom_read_success;
struct ti_am6_eeprom ep;
u8 previous_i2c_addr;
u8 mac_addr_cnt;
int i;
int ret;
/* Mark previous I2C address variable as not populated */
previous_i2c_addr = 0xff;
/* No EEPROM data was read yet */
eeprom_read_success = false;
/* Iterate through list of daughtercards */
for (i = 0; i < ARRAY_SIZE(ext_cards); i++) {
/* Obtain card-specific I2C address */
u8 i2c_addr = ext_cards[i].i2c_addr;
/* Read card EEPROM if not already read previously */
if (i2c_addr != previous_i2c_addr) {
/* Store I2C address so we can avoid reading twice */
previous_i2c_addr = i2c_addr;
/* Get and parse the daughter card EEPROM record */
ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS,
i2c_addr,
&ep,
(char **)mac_addr,
DAUGHTER_CARD_NO_OF_MAC_ADDR,
&mac_addr_cnt);
if (ret) {
debug("%s: No daughtercard EEPROM at 0x%02x found %d\n",
__func__, i2c_addr, ret);
eeprom_read_success = false;
/* Skip to the next daughtercard to probe */
continue;
}
/* EEPROM read successful, okay to further process. */
eeprom_read_success = true;
}
/* Only continue processing if EEPROM data was read */
if (!eeprom_read_success)
continue;
/* Only process the parsed data if we found a match */
if (strncmp(ep.name, ext_cards[i].card_name, sizeof(ep.name)))
continue;
printf("Detected: %s rev %s\n", ep.name, ep.version);
daughter_card_detect_flags[i] = true;
if (!IS_ENABLED(CONFIG_SPL_BUILD)) {
int j;
/*
* Populate any MAC addresses from daughtercard into the U-Boot
* environment, starting with a card-specific offset so we can
* have multiple ext_cards contribute to the MAC pool in a well-
* defined manner.
*/
for (j = 0; j < mac_addr_cnt; j++) {
if (!is_valid_ethaddr((u8 *)mac_addr[j]))
continue;
eth_env_set_enetaddr_by_index("eth", ext_cards[i].eth_offset + j,
(uchar *)mac_addr[j]);
}
}
}
if (!IS_ENABLED(CONFIG_SPL_BUILD)) {
char name_overlays[1024] = { 0 };
for (i = 0; i < ARRAY_SIZE(ext_cards); i++) {
if (!daughter_card_detect_flags[i])
continue;
/* Skip if no overlays are to be added */
if (!strlen(ext_cards[i].dtbo_name))
continue;
/*
* Make sure we are not running out of buffer space by checking
* if we can fit the new overlay, a trailing space to be used
* as a separator, plus the terminating zero.
*/
if (strlen(name_overlays) + strlen(ext_cards[i].dtbo_name) + 2 >
sizeof(name_overlays))
return -ENOMEM;
/* Append to our list of overlays */
strcat(name_overlays, ext_cards[i].dtbo_name);
strcat(name_overlays, " ");
}
/* Apply device tree overlay(s) to the U-Boot environment, if any */
if (strlen(name_overlays))
return env_set("name_overlays", name_overlays);
}
return 0;
}
#endif
/*
* This function chooses the right dtb based on the board name read from
* EEPROM if the EEPROM is programmed. Also, by default the boot chooses
* the EVM DTB if there is no EEPROM is programmed or not detected.
*/
#ifdef CONFIG_SPL_LOAD_FIT
int board_fit_config_name_match(const char *name)
{
bool eeprom_read = board_ti_was_eeprom_read();
if (!eeprom_read || board_is_j721s2_som()) {
if (!strcmp(name, "k3-j721s2-common-proc-board"))
return 0;
} else if (!eeprom_read || board_is_am68_sk_som()) {
if (!strcmp(name, "k3-am68-sk-base-board"))
return 0;
}
return -1;
}
#endif
int board_late_init(void)
{
if (IS_ENABLED(CONFIG_TI_I2C_BOARD_DETECT)) {
setup_board_eeprom_env();
setup_serial();
probe_daughtercards();
}
return 0;
}
void spl_board_init(void)
{
}