1 files changed, 130 insertions, 0 deletions
diff --git a/board/toradex/verdin-am62/verdin-am62.c b/board/toradex/verdin-am62/verdin-am62.c
new file mode 100644
index 0000000000..3d699f3205
--- /dev/null
+++ b/board/toradex/verdin-am62/verdin-am62.c
@@ -0,0 +1,130 @@
+// 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