mips: Add LinkIt Smart 7688 support

The LinkIt Smart 7688 modules have a MT7688 SoC with 128 MiB of RAM
and 32 MiB of flash (SPI NOR).

This patch also includes 2 targets. One is the target that can be
programmed into the SPI NOR flash and a 2nd target "xxx-ram" is
added to support loading and booting via an already running U-Boot
version. This allows easy development and testing without the
need to flash the image each time.

Signed-off-by: Stefan Roese <sr@denx.de>
[fixed and regenerated defconfig files]
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

diff --git a/arch/mips/dts/linkit-smart-7688.dts b/arch/mips/dts/linkit-smart-7688.dts
new file mode 100644 (file)
index 0000000..df4bf90
--- /dev/null
+++ b/arch/mips/dts/linkit-smart-7688.dts
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018 Stefan Roese <sr@denx.de>
+ */
+
+/dts-v1/;
+
+#include "mt7628a.dtsi"
+
+/ {
+       compatible = "seeed,linkit-smart-7688", "ralink,mt7628a-soc";
+       model = "LinkIt-Smart-7688";
+
+       aliases {
+               serial0 = &uart2;
+               spi0 = &spi0;
+       };
+
+       memory@0 {
+               device_type = "memory";
+               reg = <0x0 0x08000000>;
+       };
+
+       chosen {
+               bootargs = "console=ttyS0,57600";
+               stdout-path = &uart2;
+       };
+};
+
+&uart2 {
+       status = "okay";
+       clock-frequency = <40000000>;
+};
+
+&spi0 {
+       status = "okay";
+       num-cs = <2>;
+
+       spi-flash@0 {
+               #address-cells = <1>;
+               #size-cells = <1>;
+               compatible = "spi-flash", "jedec,spi-nor";
+               spi-max-frequency = <25000000>;
+               reg = <0>;
+       };
+};

diff --git a/arch/mips/mach-mt7620/Kconfig b/arch/mips/mach-mt7620/Kconfig
index 396fbd014199250fd5095fc8023f9d13f24efc2a..ef1211d1729ed3f98285432fa32d5e48113b8e7c 100644 (file)
--- a/arch/mips/mach-mt7620/Kconfig
+++ b/arch/mips/mach-mt7620/Kconfig
@@ -21,6 +21,17 @@ endchoice
 choice
        prompt "Board select"
 
+config BOARD_LINKIT_SMART_7688
+       bool "LinkIt Smart 7688"
+       depends on SOC_MT7620
+       select SUPPORTS_BOOT_RAM
+       help
+         Seeed LinkIt Smart 7688 boards have a MT7688 SoC with 128 MiB of RAM
+         and 32 MiB of flash (SPI).
+         Between its different peripherals there's an integrated switch with 4
+         ethernet ports, 1 USB port, 1 UART, GPIO buttons and LEDs, and
+         a MT7688 (PCIe).
+
 endchoice
 
 choice
@@ -110,4 +121,6 @@ endchoice
 config SUPPORTS_BOOT_RAM
        bool
 
+source "board/seeed/linkit-smart-7688/Kconfig"
+
 endmenu

diff --git a/board/seeed/linkit-smart-7688/Kconfig b/board/seeed/linkit-smart-7688/Kconfig
new file mode 100644 (file)
index 0000000..a9d6328
--- /dev/null
+++ b/board/seeed/linkit-smart-7688/Kconfig
@@ -0,0 +1,12 @@
+if BOARD_LINKIT_SMART_7688
+
+config SYS_BOARD
+       default "linkit-smart-7688"
+
+config SYS_VENDOR
+       default "seeed"
+
+config SYS_CONFIG_NAME
+       default "linkit-smart-7688"
+
+endif

diff --git a/board/seeed/linkit-smart-7688/MAINTAINERS b/board/seeed/linkit-smart-7688/MAINTAINERS
new file mode 100644 (file)
index 0000000..c3bbad4
--- /dev/null
+++ b/board/seeed/linkit-smart-7688/MAINTAINERS
@@ -0,0 +1,8 @@
+LINKIT_SMART_7688 BOARD
+M:     Stefan Roese <sr@denx.de>
+S:     Maintained
+F:     board/seeed/linkit-smart-7688
+F:     include/configs/linkit-smart-7688.h
+F:     configs/linkit-smart-7688_defconfig
+F:     configs/linkit-smart-7688_ram_defconfig
+F:     arch/mips/dts/linkit-smart-7688.dts

diff --git a/board/seeed/linkit-smart-7688/Makefile b/board/seeed/linkit-smart-7688/Makefile
new file mode 100644 (file)
index 0000000..70cd7a8
--- /dev/null
+++ b/board/seeed/linkit-smart-7688/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0+
+
+obj-y += board.o

diff --git a/board/seeed/linkit-smart-7688/board.c b/board/seeed/linkit-smart-7688/board.c
new file mode 100644 (file)
index 0000000..a28abc0
--- /dev/null
+++ b/board/seeed/linkit-smart-7688/board.c
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Stefan Roese <sr@denx.de>
+ */
+
+#include <common.h>
+#include <asm/io.h>
+
+#define MT76XX_GPIO1_MODE      0xb0000060
+
+void board_debug_uart_init(void)
+{
+       /* Select UART2 mode instead of GPIO mode (default) */
+       clrbits_le32((void __iomem *)MT76XX_GPIO1_MODE, GENMASK(27, 26));
+}
+
+int board_early_init_f(void)
+{
+       /*
+        * The pin muxing of UART2 also needs to be done, if debug uart
+        * is not enabled. So we need to call this function here as well.
+        */
+       board_debug_uart_init();
+
+       return 0;
+}

diff --git a/configs/linkit-smart-7688-ram_defconfig b/configs/linkit-smart-7688-ram_defconfig
new file mode 100644 (file)
index 0000000..77cd1c1
--- /dev/null
+++ b/configs/linkit-smart-7688-ram_defconfig
@@ -0,0 +1,51 @@
+CONFIG_MIPS=y
+CONFIG_SYS_TEXT_BASE=0x80010000
+CONFIG_ARCH_MT7620=y
+# CONFIG_MIPS_BOOT_CMDLINE_LEGACY is not set
+# CONFIG_MIPS_BOOT_ENV_LEGACY is not set
+CONFIG_MIPS_BOOT_FDT=y
+CONFIG_NR_DRAM_BANKS=1
+# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_OF_STDOUT_VIA_ALIAS=y
+CONFIG_SYS_CONSOLE_INFO_QUIET=y
+CONFIG_BOARD_EARLY_INIT_F=y
+CONFIG_HUSH_PARSER=y
+CONFIG_CMD_CPU=y
+CONFIG_CMD_LICENSE=y
+# CONFIG_CMD_BOOTD is not set
+# CONFIG_CMD_ELF is not set
+# CONFIG_CMD_XIMG is not set
+CONFIG_CMD_MEMINFO=y
+# CONFIG_CMD_FLASH is not set
+# CONFIG_CMD_LOADS is not set
+CONFIG_CMD_SF=y
+CONFIG_CMD_SPI=y
+# CONFIG_CMD_NET is not set
+CONFIG_CMD_TIME=y
+CONFIG_OF_EMBED=y
+CONFIG_DEFAULT_DEVICE_TREE="linkit-smart-7688"
+CONFIG_ENV_IS_IN_SPI_FLASH=y
+# CONFIG_DM_DEVICE_REMOVE is not set
+CONFIG_HAVE_BLOCK_DEVICE=y
+CONFIG_CLK=y
+CONFIG_CPU=y
+CONFIG_DM_GPIO=y
+CONFIG_LED=y
+CONFIG_LED_BLINK=y
+CONFIG_LED_GPIO=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_GIGADEVICE=y
+CONFIG_SPI_FLASH_MACRONIX=y
+CONFIG_SPI_FLASH_SPANSION=y
+CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_SPI_FLASH_MTD=y
+CONFIG_PHY=y
+CONFIG_POWER_DOMAIN=y
+CONFIG_RAM=y
+CONFIG_DM_RESET=y
+CONFIG_BAUDRATE=57600
+# CONFIG_SPL_SERIAL_PRESENT is not set
+CONFIG_SYS_NS16550=y
+CONFIG_SPI=y
+CONFIG_SYSRESET_SYSCON=y

diff --git a/configs/linkit-smart-7688_defconfig b/configs/linkit-smart-7688_defconfig
new file mode 100644 (file)
index 0000000..62cdda1
--- /dev/null
+++ b/configs/linkit-smart-7688_defconfig
@@ -0,0 +1,55 @@
+CONFIG_MIPS=y
+CONFIG_SYS_TEXT_BASE=0x9c000000
+CONFIG_ARCH_MT7620=y
+CONFIG_BOOT_ROM=y
+CONFIG_ONBOARD_DDR2_SIZE_1024MBIT=y
+CONFIG_ONBOARD_DDR2_CHIP_WIDTH_16BIT=y
+# CONFIG_MIPS_BOOT_CMDLINE_LEGACY is not set
+# CONFIG_MIPS_BOOT_ENV_LEGACY is not set
+CONFIG_MIPS_BOOT_FDT=y
+CONFIG_NR_DRAM_BANKS=1
+# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_OF_STDOUT_VIA_ALIAS=y
+CONFIG_SYS_CONSOLE_INFO_QUIET=y
+CONFIG_BOARD_EARLY_INIT_F=y
+CONFIG_HUSH_PARSER=y
+CONFIG_CMD_CPU=y
+CONFIG_CMD_LICENSE=y
+# CONFIG_CMD_BOOTD is not set
+# CONFIG_CMD_ELF is not set
+# CONFIG_CMD_XIMG is not set
+# CONFIG_CMD_CRC32 is not set
+CONFIG_CMD_MEMINFO=y
+# CONFIG_CMD_FLASH is not set
+# CONFIG_CMD_LOADS is not set
+CONFIG_CMD_SF=y
+CONFIG_CMD_SPI=y
+# CONFIG_CMD_NET is not set
+CONFIG_CMD_TIME=y
+CONFIG_OF_EMBED=y
+CONFIG_DEFAULT_DEVICE_TREE="linkit-smart-7688"
+CONFIG_ENV_IS_IN_SPI_FLASH=y
+# CONFIG_DM_DEVICE_REMOVE is not set
+CONFIG_HAVE_BLOCK_DEVICE=y
+CONFIG_CLK=y
+CONFIG_CPU=y
+CONFIG_DM_GPIO=y
+CONFIG_LED=y
+CONFIG_LED_BLINK=y
+CONFIG_LED_GPIO=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_GIGADEVICE=y
+CONFIG_SPI_FLASH_MACRONIX=y
+CONFIG_SPI_FLASH_SPANSION=y
+CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_SPI_FLASH_MTD=y
+CONFIG_PHY=y
+CONFIG_POWER_DOMAIN=y
+CONFIG_RAM=y
+CONFIG_DM_RESET=y
+CONFIG_BAUDRATE=57600
+# CONFIG_SPL_SERIAL_PRESENT is not set
+CONFIG_SYS_NS16550=y
+CONFIG_SPI=y
+CONFIG_SYSRESET_SYSCON=y

diff --git a/include/configs/linkit-smart-7688.h b/include/configs/linkit-smart-7688.h
new file mode 100644 (file)
index 0000000..78efa23
--- /dev/null
+++ b/include/configs/linkit-smart-7688.h
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2018 Stefan Roese <sr@denx.de>
+ */
+
+#ifndef __CONFIG_LINKIT_SMART_7688_H
+#define __CONFIG_LINKIT_SMART_7688_H
+
+/* CPU */
+#define CONFIG_SYS_MIPS_TIMER_FREQ     200000000
+
+/* RAM */
+#define CONFIG_SYS_SDRAM_BASE          0x80000000
+
+#define CONFIG_SYS_LOAD_ADDR           CONFIG_SYS_SDRAM_BASE + 0x100000
+
+#define CONFIG_SYS_INIT_SP_OFFSET      0x400000
+
+#ifdef CONFIG_BOOT_RAM
+#define CONFIG_SKIP_LOWLEVEL_INIT
+#endif
+
+/* UART */
+#define CONFIG_SYS_BAUDRATE_TABLE      { 9600, 19200, 38400, 57600, 115200, \
+                                         230400, 500000, 1500000 }
+
+/* RAM */
+#define CONFIG_SYS_MEMTEST_START       0x80100000
+#define CONFIG_SYS_MEMTEST_END         0x80400000
+
+/* Memory usage */
+#define CONFIG_SYS_MAXARGS             64
+#define CONFIG_SYS_MALLOC_LEN          (1024 * 1024)
+#define CONFIG_SYS_BOOTPARAMS_LEN      (128 * 1024)
+#define CONFIG_SYS_CBSIZE              512
+
+/* U-Boot */
+#define CONFIG_SYS_MONITOR_BASE                CONFIG_SYS_TEXT_BASE
+
+/* Environment settings */
+#define CONFIG_ENV_OFFSET              0x40000
+#define CONFIG_ENV_SIZE                        (16 << 10)
+#define CONFIG_ENV_SECT_SIZE           (64 << 10)
+
+/*
+ * Environment is right behind U-Boot in flash. Make sure U-Boot
+ * doesn't grow into the environment area.
+ */
+#define CONFIG_BOARD_SIZE_LIMIT                CONFIG_ENV_OFFSET
+
+#endif /* __CONFIG_LINKIT_SMART_7688_H */