board: siemens: Add support for SIMATIC IOT2050 devices
This adds support for the IOT2050 Basic and Advanced devices. The Basic
used the dual-core AM6528 GP processor, the Advanced one the AM6548 HS
quad-core version.
Both variants are booted via a Siemens-provided FSBL that runs on the R5
cores. Consequently, U-Boot support is targeting the A53 cores. U-Boot
SPL, ATF and TEE have to reside in SPI flash.
Full integration into a bootable image can be found on
https://github.com/siemens/meta-iot2050
Based on original board support by Le Jin, Gao Nian and Chao Zeng.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
diff --git a/board/siemens/iot2050/Kconfig b/board/siemens/iot2050/Kconfig
new file mode 100644
index 0000000..8f634c1
--- /dev/null
+++ b/board/siemens/iot2050/Kconfig
@@ -0,0 +1,32 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (c) Siemens AG, 2018-2021
+#
+# Authors:
+# Le Jin <le.jin@siemens.com>
+# Jan Kiszka <jan.kiszka@siemens.com>
+
+config TARGET_IOT2050_A53
+ bool "IOT2050 running on A53"
+ select ARM64
+ select SOC_K3_AM6
+ select BOARD_LATE_INIT
+ select SYS_DISABLE_DCACHE_OPS
+ select BINMAN
+
+if TARGET_IOT2050_A53
+
+config SYS_BOARD
+ default "iot2050"
+
+config SYS_VENDOR
+ default "siemens"
+
+config SYS_CONFIG_NAME
+ default "iot2050"
+
+config IOT2050_BOOT_SWITCH
+ bool "Disable eMMC boot via USER button (Advanced version only)"
+ default y
+
+endif
diff --git a/board/siemens/iot2050/MAINTAINERS b/board/siemens/iot2050/MAINTAINERS
new file mode 100644
index 0000000..1b52535
--- /dev/null
+++ b/board/siemens/iot2050/MAINTAINERS
@@ -0,0 +1,9 @@
+IOT2050 BOARD
+M: Le Jin <le.jin@siemens.com>
+M: Jan Kiszka <jan.kiszka@siemens.com>
+S: Maintained
+F: board/siemens/iot2050/
+F: include/configs/iot2050.h
+F: configs/iot2050_defconfig
+F: arch/arm/dts/iot2050-*
+F: doc/board/siemens/iot2050.rst
diff --git a/board/siemens/iot2050/Makefile b/board/siemens/iot2050/Makefile
new file mode 100644
index 0000000..619594a
--- /dev/null
+++ b/board/siemens/iot2050/Makefile
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Makefile for Siemens IOT2050 board
+# Copyright (c) Siemens AG, 2018-2021
+#
+# Authors:
+# Le Jin <le.jin@siemens.com>
+#
+
+obj-y += board.o
diff --git a/board/siemens/iot2050/board.c b/board/siemens/iot2050/board.c
new file mode 100644
index 0000000..b211097
--- /dev/null
+++ b/board/siemens/iot2050/board.c
@@ -0,0 +1,272 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Board specific initialization for IOT2050
+ * Copyright (c) Siemens AG, 2018-2021
+ *
+ * Authors:
+ * Le Jin <le.jin@siemens.com>
+ * Jan Kiszka <jan.kiszka@siemens.com>
+ */
+
+#include <common.h>
+#include <bootstage.h>
+#include <dm.h>
+#include <i2c.h>
+#include <led.h>
+#include <malloc.h>
+#include <net.h>
+#include <phy.h>
+#include <spl.h>
+#include <version.h>
+#include <linux/delay.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/hardware.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+
+#define IOT2050_INFO_MAGIC 0x20502050
+
+struct iot2050_info {
+ u32 magic;
+ u16 size;
+ char name[20 + 1];
+ char serial[16 + 1];
+ char mlfb[18 + 1];
+ char uuid[32 + 1];
+ char a5e[18 + 1];
+ u8 mac_addr_cnt;
+ u8 mac_addr[8][ARP_HLEN];
+ char seboot_version[40 + 1];
+} __packed;
+
+/*
+ * Scratch SRAM (available before DDR RAM) contains extracted EEPROM data.
+ */
+#define IOT2050_INFO_DATA ((struct iot2050_info *) \
+ TI_SRAM_SCRATCH_BOARD_EEPROM_START)
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static bool board_is_advanced(void)
+{
+ struct iot2050_info *info = IOT2050_INFO_DATA;
+
+ return info->magic == IOT2050_INFO_MAGIC &&
+ strstr((char *)info->name, "IOT2050-ADVANCED") != NULL;
+}
+
+static bool board_is_sr1(void)
+{
+ struct iot2050_info *info = IOT2050_INFO_DATA;
+
+ return info->magic == IOT2050_INFO_MAGIC &&
+ !strstr((char *)info->name, "-PG2");
+}
+
+static void remove_mmc1_target(void)
+{
+ char *boot_targets = strdup(env_get("boot_targets"));
+ char *mmc1 = strstr(boot_targets, "mmc1");
+
+ if (mmc1) {
+ memmove(mmc1, mmc1 + 4, strlen(mmc1 + 4) + 1);
+ env_set("boot_targets", boot_targets);
+ }
+
+ free(boot_targets);
+}
+
+void set_board_info_env(void)
+{
+ struct iot2050_info *info = IOT2050_INFO_DATA;
+ u8 __maybe_unused mac_cnt;
+ const char *fdtfile;
+
+ if (info->magic != IOT2050_INFO_MAGIC) {
+ pr_err("IOT2050: Board info parsing error!\n");
+ return;
+ }
+
+ if (env_get("board_uuid"))
+ return;
+
+ env_set("board_name", info->name);
+ env_set("board_serial", info->serial);
+ env_set("mlfb", info->mlfb);
+ env_set("board_uuid", info->uuid);
+ env_set("board_a5e", info->a5e);
+ env_set("fw_version", PLAIN_VERSION);
+ env_set("seboot_version", info->seboot_version);
+
+ if (IS_ENABLED(CONFIG_NET)) {
+ /* set MAC addresses to ensure forwarding to the OS */
+ for (mac_cnt = 0; mac_cnt < info->mac_addr_cnt; mac_cnt++) {
+ if (is_valid_ethaddr(info->mac_addr[mac_cnt]))
+ eth_env_set_enetaddr_by_index("eth",
+ mac_cnt + 1,
+ info->mac_addr[mac_cnt]);
+ }
+ }
+
+ if (board_is_advanced()) {
+ if (board_is_sr1())
+ fdtfile = "ti/k3-am6548-iot2050-advanced.dtb";
+ else
+ fdtfile = "ti/k3-am6548-iot2050-advanced-pg2.dtb";
+ } else {
+ if (board_is_sr1())
+ fdtfile = "ti/k3-am6528-iot2050-basic.dtb";
+ else
+ fdtfile = "ti/k3-am6528-iot2050-basic-pg2.dtb";
+ /* remove the unavailable eMMC (mmc1) from the list */
+ remove_mmc1_target();
+ }
+ env_set("fdtfile", fdtfile);
+
+ env_save();
+}
+
+int board_init(void)
+{
+ return 0;
+}
+
+int dram_init(void)
+{
+ if (board_is_advanced())
+ gd->ram_size = SZ_2G;
+ else
+ gd->ram_size = SZ_1G;
+
+ return 0;
+}
+
+int dram_init_banksize(void)
+{
+ dram_init();
+
+ /* 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 = gd->ram_size;
+
+ /* Bank 1 declares the memory available in the DDR high region */
+ gd->bd->bi_dram[1].start = 0;
+ gd->bd->bi_dram[1].size = 0;
+
+ return 0;
+}
+
+#ifdef CONFIG_SPL_LOAD_FIT
+int board_fit_config_name_match(const char *name)
+{
+ struct iot2050_info *info = IOT2050_INFO_DATA;
+ char upper_name[32];
+
+ if (info->magic != IOT2050_INFO_MAGIC ||
+ strlen(name) >= sizeof(upper_name))
+ return -1;
+
+ str_to_upper(name, upper_name, sizeof(upper_name));
+ if (!strcmp(upper_name, (char *)info->name))
+ return 0;
+
+ return -1;
+}
+#endif
+
+int do_board_detect(void)
+{
+ return 0;
+}
+
+#ifdef CONFIG_IOT2050_BOOT_SWITCH
+static bool user_button_pressed(void)
+{
+ struct udevice *red_led = NULL;
+ unsigned long count = 0;
+ struct gpio_desc gpio;
+
+ memset(&gpio, 0, sizeof(gpio));
+
+ if (dm_gpio_lookup_name("25", &gpio) < 0 ||
+ dm_gpio_request(&gpio, "USER button") < 0 ||
+ dm_gpio_set_dir_flags(&gpio, GPIOD_IS_IN) < 0)
+ return false;
+
+ if (dm_gpio_get_value(&gpio) == 1)
+ return false;
+
+ printf("USER button pressed - booting from external media only\n");
+
+ led_get_by_label("status-led-red", &red_led);
+
+ if (red_led)
+ led_set_state(red_led, LEDST_ON);
+
+ while (dm_gpio_get_value(&gpio) == 0 && count++ < 10000)
+ mdelay(1);
+
+ if (red_led)
+ led_set_state(red_led, LEDST_OFF);
+
+ return true;
+}
+#endif
+
+#define SERDES0_LANE_SELECT 0x00104080
+
+int board_late_init(void)
+{
+ /* change CTRL_MMR register to let serdes0 not output USB3.0 signals. */
+ writel(0x3, SERDES0_LANE_SELECT);
+
+ set_board_info_env();
+
+ /* remove the eMMC if requested via button */
+ if (IS_ENABLED(CONFIG_IOT2050_BOOT_SWITCH) && board_is_advanced() &&
+ user_button_pressed())
+ remove_mmc1_target();
+
+ return 0;
+}
+
+#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
+int ft_board_setup(void *blob, struct bd_info *bd)
+{
+ int ret;
+
+ ret = fdt_fixup_msmc_ram(blob, "/bus@100000", "sram@70000000");
+ if (ret < 0)
+ ret = fdt_fixup_msmc_ram(blob, "/interconnect@100000",
+ "sram@70000000");
+ if (ret)
+ pr_err("%s: fixing up msmc ram failed %d\n", __func__, ret);
+
+ return ret;
+}
+#endif
+
+void spl_board_init(void)
+{
+}
+
+#if CONFIG_IS_ENABLED(LED) && CONFIG_IS_ENABLED(BOOTSTAGE)
+/*
+ * Indicate any error or (accidental?) entering of CLI via the red status LED.
+ */
+void show_boot_progress(int progress)
+{
+ struct udevice *dev;
+ int ret;
+
+ if (progress < 0 || progress == BOOTSTAGE_ID_ENTER_CLI_LOOP) {
+ ret = led_get_by_label("status-led-green", &dev);
+ if (ret == 0)
+ led_set_state(dev, LEDST_OFF);
+
+ ret = led_get_by_label("status-led-red", &dev);
+ if (ret == 0)
+ led_set_state(dev, LEDST_ON);
+ }
+}
+#endif
diff --git a/board/siemens/iot2050/config.mk b/board/siemens/iot2050/config.mk
new file mode 100644
index 0000000..267ec76
--- /dev/null
+++ b/board/siemens/iot2050/config.mk
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (c) Siemens AG, 2020-2021
+#
+# Authors:
+# Jan Kiszka <jan.kiszka@siemens.com>
+
+flash.bin: all