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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Board specific initialization for Verdin AM62 SoM
*
* Copyright 2023 Toradex - https://www.toradex.com/
*
*/
#include <asm/arch/hardware.h>
#include <asm/io.h>
#include <dm/uclass.h>
#include <env.h>
#include <fdt_support.h>
#include <init.h>
#include <k3-ddrss.h>
#include <spl.h>
#include "../common/tdx-cfg-block.h"
DECLARE_GLOBAL_DATA_PTR;
int board_init(void)
{
return 0;
}
int dram_init(void)
{
gd->ram_size = get_ram_size((long *)CFG_SYS_SDRAM_BASE, CFG_SYS_SDRAM_SIZE);
if (gd->ram_size < SZ_64M)
puts("## WARNING: Less than 64MB RAM detected\n");
return 0;
}
/* Avoid relocated U-Boot and reserved-memory overlap on 512 MB SoM */
phys_size_t board_get_usable_ram_top(phys_size_t total_size)
{
return 0x9C000000; // 448M
}
#if defined(CONFIG_SPL_LOAD_FIT)
int board_fit_config_name_match(const char *name)
{
return 0;
}
#endif
#if IS_ENABLED(CONFIG_OF_LIBFDT) && IS_ENABLED(CONFIG_OF_BOARD_SETUP)
int ft_board_setup(void *blob, struct bd_info *bd)
{
return ft_common_board_setup(blob, bd);
}
#endif
static void select_dt_from_module_version(void)
{
char variant[32];
char *env_variant = env_get("variant");
int is_wifi = 0;
if (IS_ENABLED(CONFIG_TDX_CFG_BLOCK)) {
/*
* If we have a valid config block and it says we are a module with
* Wi-Fi/Bluetooth make sure we use the -wifi device tree.
*/
is_wifi = (tdx_hw_tag.prodid == VERDIN_AM62Q_WIFI_BT_IT) ||
(tdx_hw_tag.prodid == VERDIN_AM62S_512MB_WIFI_BT_IT) ||
(tdx_hw_tag.prodid == VERDIN_AM62D_1G_WIFI_BT_IT) ||
(tdx_hw_tag.prodid == VERDIN_AM62Q_2G_WIFI_BT_IT);
}
if (is_wifi)
strlcpy(&variant[0], "wifi", sizeof(variant));
else
strlcpy(&variant[0], "nonwifi", sizeof(variant));
if (strcmp(variant, env_variant)) {
printf("Setting variant to %s\n", variant);
env_set("variant", variant);
}
}
int board_late_init(void)
{
select_dt_from_module_version();
return 0;
}
#define CTRLMMR_USB0_PHY_CTRL 0x43004008
#define CTRLMMR_USB1_PHY_CTRL 0x43004018
#define CORE_VOLTAGE 0x80000000
#define MCU_CTRL_LFXOSC_32K_BYPASS_VAL BIT(4)
#ifdef CONFIG_SPL_BOARD_INIT
void spl_board_init(void)
{
u32 val;
/* Clear USB0_PHY_CTRL_CORE_VOLTAGE */
/* TI recommends to clear the bit independent of VDDA_CORE_USB */
val = readl(CTRLMMR_USB0_PHY_CTRL);
val &= ~(CORE_VOLTAGE);
writel(val, CTRLMMR_USB0_PHY_CTRL);
/* Clear USB1_PHY_CTRL_CORE_VOLTAGE */
val = readl(CTRLMMR_USB1_PHY_CTRL);
val &= ~(CORE_VOLTAGE);
writel(val, CTRLMMR_USB1_PHY_CTRL);
/* We use the 32k FOUT from the Epson RX8130CE RTC chip */
/* In WKUP_LFOSC0 clear the power down bit and set the bypass bit
* The bypass bit is required as we provide a CMOS clock signal and
* the power down seems to be required also in the bypass case
* despite of the datasheet stating otherwise
*/
/* Compare with the AM62 datasheet,
* Table 7-21. LFXOSC Modes of Operation
*/
val = readl(MCU_CTRL_LFXOSC_CTRL);
val &= ~MCU_CTRL_LFXOSC_32K_DISABLE_VAL;
val |= MCU_CTRL_LFXOSC_32K_BYPASS_VAL;
writel(val, MCU_CTRL_LFXOSC_CTRL);
/* Make sure to mux up to take the SoC 32k from the LFOSC input */
writel(MCU_CTRL_DEVICE_CLKOUT_LFOSC_SELECT_VAL,
MCU_CTRL_DEVICE_CLKOUT_32K_CTRL);
}
#endif
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