ARC: Add support for EM Development Kit board
Synopsys DesignWare ARC EM Development Kit (ARC EMDK) is
an FPGA-based development platform from Synopsys aimed to speed-up
development of software for ARC EM cores and entire subsystems based on
ARC EM like Data Fusion, Secure and Sensor & Control subsystems.
U-Boot is supposed to be used as a primary bootloader on EMDK allowing
users to easily load and start their application from micro-SD card.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
diff --git a/board/synopsys/emdk/Kconfig b/board/synopsys/emdk/Kconfig
new file mode 100644
index 0000000..a9b834d
--- /dev/null
+++ b/board/synopsys/emdk/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_EMDK
+
+config SYS_BOARD
+ default "emdk"
+
+config SYS_VENDOR
+ default "synopsys"
+
+config SYS_CONFIG_NAME
+ default "emdk"
+
+endif
diff --git a/board/synopsys/emdk/MAINTAINERS b/board/synopsys/emdk/MAINTAINERS
new file mode 100644
index 0000000..605e338
--- /dev/null
+++ b/board/synopsys/emdk/MAINTAINERS
@@ -0,0 +1,5 @@
+EM DEVELOPMENT KIT BOARD
+M: Alexey Brodkin <abrodkin@synopsys.com>
+S: Maintained
+F: board/synopsys/emdk/
+F: configs/emdk_defconfig
diff --git a/board/synopsys/emdk/Makefile b/board/synopsys/emdk/Makefile
new file mode 100644
index 0000000..4926c4e
--- /dev/null
+++ b/board/synopsys/emdk/Makefile
@@ -0,0 +1,7 @@
+#
+# Copyright (C) 2018 Synopsys, Inc. All rights reserved.
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+
+obj-y += emdk.o
diff --git a/board/synopsys/emdk/emdk.c b/board/synopsys/emdk/emdk.c
new file mode 100644
index 0000000..bbb946a
--- /dev/null
+++ b/board/synopsys/emdk/emdk.c
@@ -0,0 +1,92 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Synopsys, Inc. All rights reserved.
+ */
+
+#include <common.h>
+#include <dwmmc.h>
+#include <malloc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define ARC_PERIPHERAL_BASE 0xF0000000
+#define SDIO_BASE (ARC_PERIPHERAL_BASE + 0x10000)
+
+int board_mmc_init(bd_t *bis)
+{
+ struct dwmci_host *host = NULL;
+
+ host = malloc(sizeof(struct dwmci_host));
+ if (!host) {
+ printf("dwmci_host malloc fail!\n");
+ return 1;
+ }
+
+ memset(host, 0, sizeof(struct dwmci_host));
+ host->name = "Synopsys Mobile storage";
+ host->ioaddr = (void *)SDIO_BASE;
+ host->buswidth = 4;
+ host->dev_index = 0;
+ host->bus_hz = 50000000;
+
+ add_dwmci(host, host->bus_hz / 2, 400000);
+
+ return 0;
+}
+
+#define CREG_BASE 0xF0001000
+#define CREG_BOOT_OFFSET 0
+#define CREG_BOOT_WP_OFFSET 8
+
+#define CGU_BASE 0xF0000000
+#define CGU_IP_SW_RESET 0x0FF0
+
+void reset_cpu(ulong addr)
+{
+ writel(1, (u32 *)(CGU_BASE + CGU_IP_SW_RESET));
+ while (1)
+ ; /* loop forever till reset */
+}
+
+static int do_emdk_rom(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+ u32 creg_boot = readl((u32 *)(CREG_BASE + CREG_BOOT_OFFSET));
+
+ if (!strcmp(argv[1], "unlock"))
+ creg_boot &= ~BIT(CREG_BOOT_WP_OFFSET);
+ else if (!strcmp(argv[1], "lock"))
+ creg_boot |= BIT(CREG_BOOT_WP_OFFSET);
+ else
+ return CMD_RET_USAGE;
+
+ writel(creg_boot, (u32 *)(CREG_BASE + CREG_BOOT_OFFSET));
+
+ return CMD_RET_SUCCESS;
+}
+
+cmd_tbl_t cmd_emdk[] = {
+ U_BOOT_CMD_MKENT(rom, 2, 0, do_emdk_rom, "", ""),
+};
+
+static int do_emdk(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+ cmd_tbl_t *c;
+
+ c = find_cmd_tbl(argv[1], cmd_emdk, ARRAY_SIZE(cmd_emdk));
+
+ /* Strip off leading 'emdk' command */
+ argc--;
+ argv++;
+
+ if (c == NULL || argc > c->maxargs)
+ return CMD_RET_USAGE;
+
+ return c->cmd(cmdtp, flag, argc, argv);
+}
+
+U_BOOT_CMD(
+ emdk, CONFIG_SYS_MAXARGS, 0, do_emdk,
+ "Synopsys EMDK specific commands",
+ "rom unlock - Unlock non-volatile memory for writing\n"
+ "emdk rom lock - Lock non-volatile memory to prevent writing\n"
+);