[U-Boot] [PATCH] arc: Add support for IoT development kit
Alexey Brodkin
alexey.brodkin at synopsys.com
Thu Oct 4 11:12:39 UTC 2018
The DesignWare ARC IoT Development Kit is a versatile platform
that includes the necessary hardware and software to accelerate
software development and debugging of sensor fusion,
voice recognition and face detection designs.
More information is avaialble here [1] and here [2].
The board is based on real silicon with
ARC EM9D-based Data Fusion IP Subsystem.
It sports a rich set of I/O including
* DW USB OTG
* DW MobileStorage (used for micro SD-card)
* GPIO
* multiple serial interface including DW APB UART
* ADC, PWM and eFlash, SRAM and SPI Flash memory
* Real-Time Clock (RTC)
* Bluetooth module with worldwide regulatory compliance
(FCC, IC, CE, ETSI, TELEC)
* On-board 9-axis sensor (gyro, accelerometer and compass)
Extensible with Arduino, Pmod, mikroBUS connectors and a 2x18
extension header.
One of the most interesting features for developers is built-in
Digilent USB JTAG probe so only micro-USB cable is needed!
[1] https://www.synopsys.com/dw/ipdir.php?ds=arc_iot_development_kit
[2] https://www.synopsys.com/dw/doc.php/ds/cc/iot_dev_kit.pdf
Signed-off-by: Alexey Brodkin <abrodkin at synopsys.com>
---
arch/arc/Kconfig | 5 +
arch/arc/dts/Makefile | 1 +
arch/arc/dts/iot_devkit.dts | 45 +++++++
board/synopsys/iot_devkit/Kconfig | 12 ++
board/synopsys/iot_devkit/MAINTAINERS | 5 +
board/synopsys/iot_devkit/Makefile | 7 ++
board/synopsys/iot_devkit/config.mk | 2 +
board/synopsys/iot_devkit/iot_devkit.c | 168 +++++++++++++++++++++++++
board/synopsys/iot_devkit/u-boot.lds | 77 ++++++++++++
configs/iot_devkit_defconfig | 38 ++++++
include/configs/iot_devkit.h | 84 +++++++++++++
11 files changed, 444 insertions(+)
create mode 100644 arch/arc/dts/iot_devkit.dts
create mode 100644 board/synopsys/iot_devkit/Kconfig
create mode 100644 board/synopsys/iot_devkit/MAINTAINERS
create mode 100644 board/synopsys/iot_devkit/Makefile
create mode 100644 board/synopsys/iot_devkit/config.mk
create mode 100644 board/synopsys/iot_devkit/iot_devkit.c
create mode 100644 board/synopsys/iot_devkit/u-boot.lds
create mode 100644 configs/iot_devkit_defconfig
create mode 100644 include/configs/iot_devkit.h
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index d59aa3ae291e..b24593e137b3 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -157,6 +157,10 @@ config TARGET_EMDK
config TARGET_HSDK
bool "Support Synpsys HS DevelopmentKit board"
+config TARGET_IOT_DEVKIT
+ bool "Synopsys Brite IoT Development kit"
+ select CPU_ARCEM6
+
endchoice
source "board/abilis/tb100/Kconfig"
@@ -164,5 +168,6 @@ source "board/synopsys/Kconfig"
source "board/synopsys/axs10x/Kconfig"
source "board/synopsys/emdk/Kconfig"
source "board/synopsys/hsdk/Kconfig"
+source "board/synopsys/iot_devkit/Kconfig"
endmenu
diff --git a/arch/arc/dts/Makefile b/arch/arc/dts/Makefile
index 491a4f40bbc7..17e1405c0c48 100644
--- a/arch/arc/dts/Makefile
+++ b/arch/arc/dts/Makefile
@@ -6,6 +6,7 @@ dtb-$(CONFIG_TARGET_NSIM) += nsim.dtb
dtb-$(CONFIG_TARGET_TB100) += abilis_tb100.dtb
dtb-$(CONFIG_TARGET_EMDK) += emdk.dtb
dtb-$(CONFIG_TARGET_HSDK) += hsdk.dtb
+dtb-$(CONFIG_TARGET_IOT_DEVKIT) += iot_devkit.dtb
targets += $(dtb-y)
diff --git a/arch/arc/dts/iot_devkit.dts b/arch/arc/dts/iot_devkit.dts
new file mode 100644
index 000000000000..ebf5a950f0f2
--- /dev/null
+++ b/arch/arc/dts/iot_devkit.dts
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Synopsys, Inc. All rights reserved.
+ */
+/dts-v1/;
+
+#include "skeleton.dtsi"
+
+/ {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ aliases {
+ console = &uart0;
+ };
+
+ cpu_card {
+ core_clk: core_clk {
+ #clock-cells = <0>;
+ compatible = "fixed-clock";
+ clock-frequency = <144000000>;
+ u-boot,dm-pre-reloc;
+ };
+ };
+
+ uart0: serial0 at 80014000 {
+ compatible = "snps,dw-apb-uart";
+ clock-frequency = <16000000>;
+ reg = <0x80014000 0x1000>;
+ reg-shift = <2>;
+ reg-io-width = <4>;
+ };
+
+ usb: usb at f0040000 {
+ compatible = "snps,dwc2";
+ reg = <0xf0040000 0x10000>;
+ phys = <&usbphy>;
+ phy-names = "usb2-phy";
+ };
+
+ usbphy: phy {
+ compatible = "nop-phy";
+ #phy-cells = <0>;
+ };
+};
diff --git a/board/synopsys/iot_devkit/Kconfig b/board/synopsys/iot_devkit/Kconfig
new file mode 100644
index 000000000000..ad956b20f770
--- /dev/null
+++ b/board/synopsys/iot_devkit/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_IOT_DEVKIT
+
+config SYS_BOARD
+ default "iot_devkit"
+
+config SYS_VENDOR
+ default "synopsys"
+
+config SYS_CONFIG_NAME
+ default "iot_devkit"
+
+endif
diff --git a/board/synopsys/iot_devkit/MAINTAINERS b/board/synopsys/iot_devkit/MAINTAINERS
new file mode 100644
index 000000000000..06457cfa6ae2
--- /dev/null
+++ b/board/synopsys/iot_devkit/MAINTAINERS
@@ -0,0 +1,5 @@
+IOT DEVKIT BOARD
+M: Alexey Brodkin <abrodkin at synopsys.com>
+S: Maintained
+F: board/synopsys/iot_devkit/
+F: configs/iot_devkit_defconfig
diff --git a/board/synopsys/iot_devkit/Makefile b/board/synopsys/iot_devkit/Makefile
new file mode 100644
index 000000000000..161602464382
--- /dev/null
+++ b/board/synopsys/iot_devkit/Makefile
@@ -0,0 +1,7 @@
+#
+# Copyright (C) 2018 Synopsys, Inc. All rights reserved.
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+
+obj-y += iot_devkit.o
diff --git a/board/synopsys/iot_devkit/config.mk b/board/synopsys/iot_devkit/config.mk
new file mode 100644
index 000000000000..120733538a40
--- /dev/null
+++ b/board/synopsys/iot_devkit/config.mk
@@ -0,0 +1,2 @@
+PLATFORM_CPPFLAGS += -mlittle-endian -mcode-density -mdiv-rem -mswap -mnorm -mmpy-option=6 -mbarrel-shifter
+LDSCRIPT = $(srctree)/board/synopsys/iot_devkit/u-boot.lds
diff --git a/board/synopsys/iot_devkit/iot_devkit.c b/board/synopsys/iot_devkit/iot_devkit.c
new file mode 100644
index 000000000000..c185d5cdb5cc
--- /dev/null
+++ b/board/synopsys/iot_devkit/iot_devkit.c
@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Synopsys, Inc. All rights reserved.
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <dwmmc.h>
+#include <linux/libfdt.h>
+#include <fdtdec.h>
+
+#include <asm/arcregs.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define SYSCON_BASE 0xf000a000
+#define AHBCKDIV (void *)(SYSCON_BASE + 0x04)
+#define APBCKDIV (void *)(SYSCON_BASE + 0x08)
+#define APBCKEN (void *)(SYSCON_BASE + 0x0C)
+#define CLKSEL (void *)(SYSCON_BASE + 0x24)
+#define CLKSTAT (void *)(SYSCON_BASE + 0x28)
+#define PLLCON (void *)(SYSCON_BASE + 0x2C)
+#define APBCKSEL (void *)(SYSCON_BASE + 0x30)
+#define AHBCKEN (void *)(SYSCON_BASE + 0x34)
+#define USBPHY_PLL (void *)(SYSCON_BASE + 0x78)
+#define USBCFG (void *)(SYSCON_BASE + 0x7c)
+
+#define PLL_MASK_0 0xffcfffff
+#define PLL_MASK_1 0xffcfff00
+#define PLL_MASK_2 0xfbcfff00
+
+#define CLKSEL_DEFAULT 0x5a690000
+
+static int set_cpu_freq(unsigned int clk)
+{
+ clk /= 1000000;
+
+ /* Set clk to ext Xtal (LSN value 0) */
+ writel(CLKSEL_DEFAULT, CLKSEL);
+
+ switch (clk) {
+ case 16:
+ /* Bypass mode */
+ return 0;
+
+ case 50:
+ writel(readl(PLLCON) & PLL_MASK_0, PLLCON);
+ /* pll_off=1, M=25, N=1, OD=3, PLL_OUT_CLK=50M */
+ writel((readl(PLLCON) & PLL_MASK_1) | 0x300191, PLLCON);
+ /* pll_off=0, M=25, N=1, OD=3, PLL_OUT_CLK=50M */
+ writel((readl(PLLCON) & PLL_MASK_2) | 0x300191, PLLCON);
+ break;
+
+ case 72:
+ writel(readl(PLLCON) & PLL_MASK_0, PLLCON);
+ /* pll_off=1, M=18, N=1, OD=2, PLL_OUT_CLK=72M */
+ writel((readl(PLLCON) & PLL_MASK_1) | 0x200121, PLLCON);
+ /* pll_off=0, M=18, N=1, OD=2, PLL_OUT_CLK=72M */
+ writel((readl(PLLCON) & PLL_MASK_2) | 0x200121, PLLCON);
+ break;
+
+ case 100:
+ writel(readl(PLLCON) & PLL_MASK_0, PLLCON);
+ /* pll_off=1,M=25, N=1, OD=2, PLL_OUT_CLK=100M */
+ writel((readl(PLLCON) & PLL_MASK_1) | 0x200191, PLLCON);
+ /* pll_off=0,M=25, N=1, OD=2, PLL_OUT_CLK=100M */
+ writel((readl(PLLCON) & PLL_MASK_2) | 0x200191, PLLCON);
+ break;
+
+ case 144:
+ writel(readl(PLLCON) & PLL_MASK_0, PLLCON);
+ /* pll_off=1, M=18, N=1, OD=1, PLL_OUT_CLK=144M */
+ writel((readl(PLLCON) & PLL_MASK_1) | 0x100121, PLLCON);
+ /* pll_off=0, M=18, N=1, OD=1, PLL_OUT_CLK=144M */
+ writel((readl(PLLCON) & PLL_MASK_2) | 0x100121, PLLCON);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ while (!(readl(CLKSTAT) & 0x4))
+ ;
+
+ /* Set clk from PLL on bus (LSN = 1) */
+ writel(CLKSEL_DEFAULT | BIT(0), CLKSEL);
+
+ return 0;
+}
+
+extern u8 __rom_end[];
+extern u8 __ram_start[];
+extern u8 __ram_end[];
+
+/*
+ * Use mach_cpu_init() for .data section copy as board_early_init_f() will be
+ * too late: initf_dm() will use a value of "av_" variable from not yet
+ * initialized (by copy) area.
+ */
+int mach_cpu_init(void)
+{
+ int offset, freq;
+
+ /* Don't relocate U-Boot */
+ gd->flags |= GD_FLG_SKIP_RELOC;
+
+ /* Copy data from ROM to RAM */
+ u8 *src = __rom_end;
+ u8 *dst = __ram_start;
+
+ while (dst < __ram_end)
+ *dst++ = *src++;
+
+ /* Enable debug uart */
+#define DEBUG_UART_BASE 0x80014000
+#define DEBUG_UART_DLF_OFFSET 0xc0
+ write_aux_reg(DEBUG_UART_BASE + DEBUG_UART_DLF_OFFSET, 1);
+
+ offset = fdt_path_offset(gd->fdt_blob, "/cpu_card/core_clk");
+ if (offset < 0)
+ return offset;
+
+ freq = fdtdec_get_int(gd->fdt_blob, offset, "clock-frequency", 0);
+ if (!freq)
+ return -EINVAL;
+
+ /* If CPU freq > 100 MHz, divide eFLASH clock by 2 */
+ if (freq > 100000000) {
+ u32 reg = readl(AHBCKDIV);
+
+ reg &= ~(0xF << 8);
+ reg |= 2 << 8;
+ writel(reg, AHBCKDIV);
+ }
+
+ return set_cpu_freq(freq);
+}
+
+#define ARC_PERIPHERAL_BASE 0xF0000000
+#define SDIO_BASE (ARC_PERIPHERAL_BASE + 0xB000)
+
+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 -ENOMEM;
+ }
+
+ 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;
+}
+
+int checkboard(void)
+{
+ puts("Board: Synopsys IoT Development Kit\n");
+ return 0;
+};
diff --git a/board/synopsys/iot_devkit/u-boot.lds b/board/synopsys/iot_devkit/u-boot.lds
new file mode 100644
index 000000000000..d08316870553
--- /dev/null
+++ b/board/synopsys/iot_devkit/u-boot.lds
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2018 Synopsys, Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <config.h>
+
+MEMORY {
+ ROM : ORIGIN = ROM_BASE, LENGTH = ROM_SIZE
+ RAM : ORIGIN = RAM_DATA_BASE, LENGTH = RAM_DATA_SIZE
+}
+
+OUTPUT_FORMAT("elf32-littlearc", "elf32-littlearc", "elf32-littlearc")
+OUTPUT_ARCH(arc)
+ENTRY(_start)
+SECTIONS
+{
+ . = CONFIG_SYS_MONITOR_BASE;
+ __image_copy_start = .;
+ .ivt :
+ {
+ __ivt_start = .;
+ KEEP(*(.ivt));
+ __ivt_end = .;
+ } > ROM
+
+ . = ALIGN(1024);
+ .text : {
+ __text_start = .;
+ arch/arc/lib/start.o (.text*)
+ *(.text*)
+ __text_end = .;
+ } > ROM
+
+ . = ALIGN(4);
+ .rodata : {
+ *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*)))
+ } > ROM
+
+ . = ALIGN(4);
+ .u_boot_list : {
+ KEEP(*(SORT(.u_boot_list*)));
+
+ /* Mark RAM's LMA */
+ . = ALIGN(4);
+ __rom_end = .;
+ } > ROM
+
+ .data : {
+ /* Mark RAM's VMA */
+ . = ALIGN(4);
+
+ /*
+ * Everything between __ram_start and __ram_start will be
+ * copied from ROM to RAM in board_early_init_f().
+ */
+ __ram_start = .;
+
+ *(.data*)
+
+ __ram_end = .;
+ } > RAM AT > ROM
+
+ .bss : {
+ . = ALIGN(1024);
+ __bss_start = .;
+ *(.bss*)
+ __bss_end = .;
+ } > RAM
+
+ /* Keep relocation-related symbols to make linker happy */
+ __rel_dyn_start = .;
+ __rel_dyn_end = .;
+ __image_copy_end = .;
+ __init_end = .;
+}
diff --git a/configs/iot_devkit_defconfig b/configs/iot_devkit_defconfig
new file mode 100644
index 000000000000..1f0f9c325676
--- /dev/null
+++ b/configs/iot_devkit_defconfig
@@ -0,0 +1,38 @@
+CONFIG_ARC=y
+CONFIG_ISA_ARCV2=y
+CONFIG_CPU_ARCEM6=y
+CONFIG_SYS_ICACHE_OFF=y
+CONFIG_SYS_DCACHE_OFF=y
+CONFIG_TARGET_IOT_DEVKIT=y
+CONFIG_SYS_TEXT_BASE=0x20000000
+CONFIG_SYS_CLK_FREQ=16000000
+# CONFIG_ARCH_FIXUP_FDT_MEMORY is not set
+CONFIG_SYS_PROMPT="IoTDK# "
+# CONFIG_CMD_BOOTD is not set
+# CONFIG_CMD_BOOTM is not set
+# CONFIG_CMD_ELF is not set
+# CONFIG_CMD_XIMG is not set
+# CONFIG_CMD_FLASH is not set
+# CONFIG_CMD_LOADB is not set
+# CONFIG_CMD_LOADS is not set
+CONFIG_CMD_MMC=y
+CONFIG_CMD_USB=y
+# CONFIG_CMD_NET is not set
+CONFIG_CMD_FAT=y
+CONFIG_OF_CONTROL=y
+CONFIG_OF_EMBED=y
+CONFIG_DEFAULT_DEVICE_TREE="iot_devkit"
+CONFIG_ENV_IS_IN_FAT=y
+CONFIG_ENV_FAT_INTERFACE="mmc"
+CONFIG_ENV_FAT_DEVICE_AND_PART="0:1"
+CONFIG_DM=y
+CONFIG_MMC=y
+CONFIG_MMC_DW=y
+CONFIG_DM_SERIAL=y
+CONFIG_SYS_NS16550=y
+CONFIG_USB=y
+CONFIG_DM_USB=y
+CONFIG_USB_DWC2=y
+CONFIG_USB_DWC2_BUFFER_SIZE=16
+CONFIG_USB_STORAGE=y
+CONFIG_FS_FAT_MAX_CLUSTSIZE=4096
diff --git a/include/configs/iot_devkit.h b/include/configs/iot_devkit.h
new file mode 100644
index 000000000000..4ffe1141d922
--- /dev/null
+++ b/include/configs/iot_devkit.h
@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2018 Synopsys, Inc. All rights reserved.
+ */
+
+#ifndef _CONFIG_IOT_DEVKIT_H_
+#define _CONFIG_IOT_DEVKIT_H_
+
+#include <linux/sizes.h>
+
+/*
+ * MEMORY MAP
+ *
+ * eFlash: 0x0000_0000 - 0x0008_0000 (512K)
+ * ICCM: 0x2000_0000 - 0x2004_0000 (256K)
+ * SRAM: 0x3000_0000 - 0x3002_0000 (128K)
+ * DCCM: 0x8000_0000 - 0x8002_0000 (128K)
+ * Note: only data goes here, as IFQ cannot fetch instructions from DCCM
+ *
+ *
+ * RAM PARTITIONING
+ *
+ * +-----------+----------+---------------------+-------------+
+ * | <-- Stack | .data | Malloc | Environment |
+ * +-----------+----------+---------------------+-------------+
+ * : : : :\___________/
+ * : : : : |
+ * : : : : CONFIG_ENV_SIZE
+ * : : \____________________/
+ * : : |
+ * : : CONFIG_SYS_MALLOC_LEN
+ * : :
+ * : Specified explicitly by CONFIG_SYS_INIT_SP_ADDR
+ * :
+ * Specified explicitly by CONFIG_SYS_SDRAM_BASE
+ *
+ * NOTES:
+ * - Stack starts from CONFIG_SYS_INIT_SP_ADDR and grows down,
+ * i.e. towards CONFIG_SYS_SDRAM_BASE but nothing stops it from crossing
+ * that CONFIG_SYS_SDRAM_BASE in which case data won't be really saved on
+ * stack any longer and values popped from stack will contain garbage
+ * leading to unexpected behavior, typically but not limited to:
+ * - "Returning" back to bogus caller function
+ * - Reading data from weird addresses
+ */
+
+#define CONFIG_SYS_MONITOR_BASE CONFIG_SYS_TEXT_BASE
+
+#define SRAM_BASE 0x30000000
+#define SRAM_SIZE SZ_128K
+
+#define DCCM_BASE 0x80000000
+#define DCCM_SIZE SZ_128K
+
+#define CONFIG_SYS_SDRAM_BASE DCCM_BASE
+#define CONFIG_SYS_SDRAM_SIZE DCCM_SIZE
+
+#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + SZ_32K)
+
+#define CONFIG_SYS_MALLOC_LEN SZ_64K
+#define CONFIG_SYS_BOOTM_LEN SZ_128K
+#define CONFIG_SYS_LOAD_ADDR SRAM_BASE
+
+#define ROM_BASE CONFIG_SYS_MONITOR_BASE
+#define ROM_SIZE SZ_256K
+
+#define RAM_DATA_BASE CONFIG_SYS_INIT_SP_ADDR
+#define RAM_DATA_SIZE CONFIG_SYS_SDRAM_SIZE - \
+ (CONFIG_SYS_INIT_SP_ADDR - \
+ CONFIG_SYS_SDRAM_BASE) - \
+ CONFIG_SYS_MALLOC_LEN - \
+ CONFIG_ENV_SIZE
+
+/* Required by DW MMC driver */
+#define CONFIG_BOUNCE_BUFFER
+
+/*
+ * Environment
+ */
+#define CONFIG_ENV_SIZE SZ_4K
+#define CONFIG_BOOTFILE "app.bin"
+#define CONFIG_LOADADDR CONFIG_SYS_LOAD_ADDR
+
+#endif /* _CONFIG_IOT_DEVKIT_H_ */
--
2.17.1
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