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// SPDX-License-Identifier: GPL-2.0-or-later
/* Copyright (C) 2025 Toradex */
#include <asm/arch/clock.h>
#include <asm/arch/mu.h>
#include <asm/arch/sys_proto.h>
#include <asm/mach-imx/boot_mode.h>
#include <asm/mach-imx/ele_api.h>
#include <asm/sections.h>
#include <asm/global_data.h>
#include <clk.h>
#include <dm/ofnode.h>
#include <dm/uclass.h>
#include <hang.h>
#include <i2c.h>
#include <init.h>
#include <spl.h>
DECLARE_GLOBAL_DATA_PTR;
#define EC_I2C_BUS_NODE_PATH "/soc/bus@42000000/i2c@42540000"
int spl_board_boot_device(enum boot_device boot_dev_spl)
{
switch (boot_dev_spl) {
case SD1_BOOT:
case MMC1_BOOT:
return BOOT_DEVICE_MMC1;
case SD2_BOOT:
case MMC2_BOOT:
return BOOT_DEVICE_MMC2;
case USB_BOOT:
return BOOT_DEVICE_BOARD;
default:
return BOOT_DEVICE_NONE;
}
}
static void ec_boot_notify(void)
{
struct udevice *bus;
struct udevice *i2c_dev;
ofnode node;
int ret;
u8 val = 0x03;
node = ofnode_path(EC_I2C_BUS_NODE_PATH);
if (!ofnode_valid(node)) {
puts("Failed to find Toradex EC I2C BUS node\n");
return;
}
ret = uclass_get_device_by_ofnode(UCLASS_I2C, node, &bus);
if (ret) {
puts("Failed to get Toradex EC I2C BUS\n");
return;
}
ret = dm_i2c_probe(bus, 0x28, 0, &i2c_dev);
if (ret) {
puts("Toradex EC not found\n");
return;
}
/* USB configuration before this command (when SoC starts in recovery):
* - SoC USB1 -> Smarc USB0
* - SoC USB2 -> NC
* After the command:
* - SoC USB1 -> SoM hub -> Smarc USB1, USB2, USB3 and USB4
* - SoC USB2 -> Smarc USB0
*/
ret = dm_i2c_write(i2c_dev, 0xD0, &val, 1);
if (ret)
puts("Cannot send command to Toradex EC\n");
}
void spl_board_init(void)
{
int ret;
ret = ele_start_rng();
if (ret)
printf("Fail to start RNG: %d\n", ret);
}
void board_init_f(ulong dummy)
{
int ret;
/* Clear the BSS. */
memset(__bss_start, 0, __bss_end - __bss_start);
if (IS_ENABLED(CONFIG_SPL_RECOVER_DATA_SECTION))
spl_save_restore_data();
timer_init();
/* Need dm_init() to run before any SCMI calls */
spl_early_init();
/* Need to enable SCMI drivers and ELE driver before console */
ret = imx9_probe_mu();
if (ret)
hang(); /* MU not probed, nothing can be outputed, hang */
arch_cpu_init();
preloader_console_init();
debug("SOC: 0x%x\n", gd->arch.soc_rev);
debug("LC: 0x%x\n", gd->arch.lifecycle);
ec_boot_notify();
get_reset_reason(true, false);
board_init_r(NULL, 0);
}
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