[PATCH 08/11] board: ti: Introduce the basic files to support AM62 SK board

[Vignesh Raghavendra <vigneshr@ti.com>]

From: Suman Anna <s-anna@ti.com>

Add basic support for AM64 SK. This has 2GB DDR.
Note that stack for R5 SPL is in OCRAM @ 0x7000ffff so that is away from
BSS and does not step on BSS section

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
---
 arch/arm/mach-k3/Kconfig              |   1 +
 board/ti/am62x/Kconfig                |  63 +++++++++++
 board/ti/am62x/Makefile               |   8 ++
 board/ti/am62x/evm.c                  | 149 ++++++++++++++++++++++++++
 drivers/firmware/ti_sci_static_data.h |   7 ++
 5 files changed, 228 insertions(+)
 create mode 100644 board/ti/am62x/Kconfig
 create mode 100644 board/ti/am62x/Makefile
 create mode 100644 board/ti/am62x/evm.c

diff --git a/arch/arm/mach-k3/Kconfig b/arch/arm/mach-k3/Kconfig
index 0dc4f44fdd..57f693e9a1 100644
--- a/arch/arm/mach-k3/Kconfig
+++ b/arch/arm/mach-k3/Kconfig
@@ -178,6 +178,7 @@ config K3_DM_FW
 
 source "board/ti/am65x/Kconfig"
 source "board/ti/am64x/Kconfig"
+source "board/ti/am62x/Kconfig"
 source "board/ti/j721e/Kconfig"
 source "board/siemens/iot2050/Kconfig"
 source "board/ti/j721s2/Kconfig"
diff --git a/board/ti/am62x/Kconfig b/board/ti/am62x/Kconfig
new file mode 100644
index 0000000000..95eec27170
--- /dev/null
+++ b/board/ti/am62x/Kconfig
@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2020-2022 Texas Instruments Incorporated - https://www.ti.com/
+#	Suman Anna <s-anna@ti.com>
+
+choice
+	prompt "TI K3 AM62x based boards"
+	optional
+
+config TARGET_AM625_A53_EVM
+	bool "TI K3 based AM625 EVM running on A53"
+	select ARM64
+	select SOC_K3_AM625
+	imply BOARD
+	imply SPL_BOARD
+	imply TI_I2C_BOARD_DETECT
+
+config TARGET_AM625_R5_EVM
+	bool "TI K3 based AM625 EVM running on R5"
+	select CPU_V7R
+	select SYS_THUMB_BUILD
+	select K3_LOAD_SYSFW
+	select SOC_K3_AM625
+	select RAM
+	select SPL_RAM
+	select K3_DDRSS
+	imply SYS_K3_SPL_ATF
+	imply TI_I2C_BOARD_DETECT
+
+endchoice
+
+if TARGET_AM625_A53_EVM
+
+config SYS_BOARD
+       default "am62x"
+
+config SYS_VENDOR
+       default "ti"
+
+config SYS_CONFIG_NAME
+       default "am62x_evm"
+
+source "board/ti/common/Kconfig"
+
+endif
+
+if TARGET_AM625_R5_EVM
+
+config SYS_BOARD
+       default "am62x"
+
+config SYS_VENDOR
+       default "ti"
+
+config SYS_CONFIG_NAME
+       default "am62x_evm"
+
+config SPL_LDSCRIPT
+	default "arch/arm/mach-omap2/u-boot-spl.lds"
+
+source "board/ti/common/Kconfig"
+
+endif
diff --git a/board/ti/am62x/Makefile b/board/ti/am62x/Makefile
new file mode 100644
index 0000000000..f4c35edffa
--- /dev/null
+++ b/board/ti/am62x/Makefile
@@ -0,0 +1,8 @@
+#
+# Copyright (C) 2020-2022 Texas Instruments Incorporated - https://www.ti.com/
+#	Suman Anna <s-anna@ti.com>
+#
+# SPDX-License-Identifier:     GPL-2.0+
+#
+
+obj-y	+= evm.o
diff --git a/board/ti/am62x/evm.c b/board/ti/am62x/evm.c
new file mode 100644
index 0000000000..cf25f0acd9
--- /dev/null
+++ b/board/ti/am62x/evm.c
@@ -0,0 +1,149 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Board specific initialization for AM62x platforms
+ *
+ * Copyright (C) 2020-2022 Texas Instruments Incorporated - https://www.ti.com/
+ *	Suman Anna <s-anna@ti.com>
+ *
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <spl.h>
+#include <fdt_support.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/sys_proto.h>
+#include <env.h>
+
+#include "../common/board_detect.h"
+
+#define board_is_am62x_skevm()	board_ti_k3_is("AM62-SKEVM")
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int board_init(void)
+{
+	return 0;
+}
+
+int dram_init(void)
+{
+	gd->ram_size = 0x80000000;
+
+	return 0;
+}
+
+int dram_init_banksize(void)
+{
+	/* Bank 0 declares the memory available in the DDR low region */
+	gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
+	gd->bd->bi_dram[0].size = 0x80000000;
+	gd->ram_size = 0x80000000;
+
+	return 0;
+}
+
+#if defined(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_am62x_skevm()) {
+		if (!strcmp(name, "k3-am625-r5-sk") || !strcmp(name, "k3-am625-sk"))
+			return 0;
+	}
+
+	return -1;
+}
+#endif
+
+#ifdef CONFIG_TI_I2C_BOARD_DETECT
+int do_board_detect(void)
+{
+	int ret;
+
+	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())
+		printf("Board: %s rev %s\n", ep->name, ep->version);
+
+	return 0;
+}
+
+#ifdef CONFIG_BOARD_LATE_INIT
+static void setup_board_eeprom_env(void)
+{
+	char *name = "am62x_skevm";
+
+	if (do_board_detect())
+		goto invalid_eeprom;
+
+	if (board_is_am62x_skevm())
+		name = "am62x_skevm";
+	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);
+}
+#endif
+#endif
+
+#ifdef CONFIG_BOARD_LATE_INIT
+int board_late_init(void)
+{
+	if (IS_ENABLED(CONFIG_TI_I2C_BOARD_DETECT)) {
+		struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
+
+		setup_board_eeprom_env();
+		setup_serial();
+		/*
+		 * The first MAC address for ethernet a.k.a. ethernet0 comes from
+		 * efuse populated via the am654 gigabit eth switch subsystem driver.
+		 * All the other ones are populated via EEPROM, hence continue with
+		 * an index of 1.
+		 */
+		board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt);
+	}
+
+	return 0;
+}
+#endif
diff --git a/drivers/firmware/ti_sci_static_data.h b/drivers/firmware/ti_sci_static_data.h
index e6a3b66c03..21e783cc45 100644
--- a/drivers/firmware/ti_sci_static_data.h
+++ b/drivers/firmware/ti_sci_static_data.h
@@ -118,6 +118,13 @@ static struct ti_sci_resource_static_data rm_static_data[] = {
 };
 #endif /* CONFIG_TARGET_J721S2_R5_EVM */
 
+#if IS_ENABLED(CONFIG_TARGET_AM625_R5_EVM)
+static struct ti_sci_resource_static_data rm_static_data[] = {
+	{ },
+};
+
+#endif /* CONFIG_TARGET_AM625_R5_EVM */
+
 #else
 static struct ti_sci_resource_static_data rm_static_data[] = {
 	{ },
-- 
2.35.3