On 2/4/20 6:38 AM, Bin Meng wrote:
Hi Sean,
On Mon, Feb 3, 2020 at 4:11 AM Sean Anderson seanga2@gmail.com wrote:
The Sipeed Maix series is a collection of boards built around the RISC-V Kendryte K210 processor. This processor contains several peripherals to accelerate neural network processing and other "ai" tasks. This includes a "KPU" neural network processor, an audio processor supporting beamforming reception, and a digital video port supporting capture and output at VGA resolution. Other peripherals include 8M of sram (accessible with and without caching); remappable pins, including 40 GPIOs; AES, FFT, and SHA256 accelerators; a DMA controller; and I2C, I2S, and SPI controllers. Maix peripherals vary, but include spi flash; on-board usb-serial bridges; ports for cameras, displays, and sd cards; and ESP32 chips. Currently, only the Sipeed Maix Bit V2.0 (bitm) is supported, but the boards are fairly similar.
Documentation for Maix boards is located at http://dl.sipeed.com/MAIX/HDK/. Documentation for the Kendryte K210 is located at https://kendryte.com/downloads/. However, hardware details are rather lacking, so most technical reference has been taken from the standalone sdk located at https://github.com/kendryte/kendryte-standalone-sdk.
Signed-off-by: Sean Anderson seanga2@gmail.com
Changes for v3:
- Reorder to be last in the patch series
- Add documentation for the board
- Generate defconfig with "make savedefconfig"
- Update Kconfig to imply most features we need
- Update MAINTAINERS
Changes for v2:
- Select CONFIG_SYS_RISCV_NOCOUNTER
- Imply CONFIG_CLK_K210
- Remove spurious references to CONFIG_ARCH_K210
- Remove many configs from defconfig where the defaults were fine
- Add a few "not set" lines to suppress unneeded defaults
- Reduce pre-reloc malloc space, now that clocks initialization happens later
arch/riscv/Kconfig | 4 +++ board/sipeed/maix/Kconfig | 51 ++++++++++++++++++++++++++++++ board/sipeed/maix/MAINTAINERS | 10 ++++++ board/sipeed/maix/Makefile | 5 +++ board/sipeed/maix/maix.c | 9 ++++++ configs/sipeed_maix_bitm_defconfig | 10 ++++++ doc/board/index.rst | 1 + doc/board/kendryte/index.rst | 9 ++++++ doc/board/kendryte/k210.rst | 46 +++++++++++++++++++++++++++ include/configs/sipeed-maix.h | 19 +++++++++++ 10 files changed, 164 insertions(+) create mode 100644 board/sipeed/maix/Kconfig create mode 100644 board/sipeed/maix/MAINTAINERS create mode 100644 board/sipeed/maix/Makefile create mode 100644 board/sipeed/maix/maix.c create mode 100644 configs/sipeed_maix_bitm_defconfig create mode 100644 doc/board/kendryte/index.rst create mode 100644 doc/board/kendryte/k210.rst create mode 100644 include/configs/sipeed-maix.h
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 87c40f6c4c..81ab35dd2d 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -20,6 +20,9 @@ config TARGET_QEMU_VIRT config TARGET_SIFIVE_FU540 bool "Support SiFive FU540 Board"
+config TARGET_SIPEED_MAIX
bool "Support Sipeed Maix Board"endchoice
config SYS_ICACHE_OFF @@ -53,6 +56,7 @@ source "board/AndesTech/ax25-ae350/Kconfig" source "board/emulation/qemu-riscv/Kconfig" source "board/microchip/mpfs_icicle/Kconfig" source "board/sifive/fu540/Kconfig" +source "board/sipeed/maix/Kconfig"
# platform-specific options below source "arch/riscv/cpu/ax25/Kconfig" diff --git a/board/sipeed/maix/Kconfig b/board/sipeed/maix/Kconfig new file mode 100644 index 0000000000..b23d2448d9 --- /dev/null +++ b/board/sipeed/maix/Kconfig @@ -0,0 +1,51 @@ +# SPDX-License-Identifier: GPL-2.0+ +# Copyright (C) 2019 Sean Anderson seanga2@gmail.com
+if TARGET_SIPEED_MAIX
+config SYS_BOARD
default "maix"+config SYS_VENDOR
default "sipeed"+config SYS_CPU
default "generic"+config SYS_CONFIG_NAME
default "sipeed-maix"+config SYS_TEXT_BASE
default 0x80000000+config DEFAULT_DEVICE_TREE
default "k210-maix-bit"+config NR_CPUS
default 2+config NR_DRAM_BANKS
default 2+config BOARD_SPECIFIC_OPTIONS
def_bool yselect GENERIC_RISCVselect RISCV_PRIV_1_9_1imply DM_SERIALimply SIFIVE_SERIALimply SIFIVE_CLINTimply CLK_CCFimply CLK_COMPOSITE_CCFimply CLK_K210imply DM_RESETimply RESET_SYSCONimply SYSRESETimply SYSRESET_SYSCONimply SPIimply DESIGNWARE_SPIimply SPI_FLASH_GIGADEVICEimply MMCimply MMC_SPIimply MMC_BROKEN_CDimply CMD_MMC+endif diff --git a/board/sipeed/maix/MAINTAINERS b/board/sipeed/maix/MAINTAINERS new file mode 100644 index 0000000000..43cf61fb64 --- /dev/null +++ b/board/sipeed/maix/MAINTAINERS @@ -0,0 +1,10 @@ +Sipeed Maix BOARD +M: Sean Anderson seanga2@gmail.com +S: Maintained +F: arch/riscv/dts/k210.dtsi +F: arch/riscv/dts/k210-maix-bit.dts +F: board/sipeed/maix/ +F: configs/sipeed_maix_defconfig +F: drivers/clk/kendryte/ +F: include/configs/sipeed-maix.h +F: include/dt-bindings/*/k210-sysctl.h diff --git a/board/sipeed/maix/Makefile b/board/sipeed/maix/Makefile new file mode 100644 index 0000000000..4acff5b31e --- /dev/null +++ b/board/sipeed/maix/Makefile @@ -0,0 +1,5 @@ +# SPDX-License-Identifier: GPL-2.0+ +# +# Copyright (c) 2019 Western Digital Corporation or its affiliates.
+obj-y += maix.o diff --git a/board/sipeed/maix/maix.c b/board/sipeed/maix/maix.c new file mode 100644 index 0000000000..f8e773acf7 --- /dev/null +++ b/board/sipeed/maix/maix.c @@ -0,0 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0+ +/*
- Copyright (C) 2019 Sean Anderson seanga2@gmail.com
- */
+int board_init(void) +{
return 0;+} diff --git a/configs/sipeed_maix_bitm_defconfig b/configs/sipeed_maix_bitm_defconfig new file mode 100644 index 0000000000..22d814ec7f --- /dev/null +++ b/configs/sipeed_maix_bitm_defconfig @@ -0,0 +1,10 @@ +CONFIG_RISCV=y +CONFIG_TARGET_SIPEED_MAIX=y +CONFIG_ARCH_RV64I=y +# CONFIG_LEGACY_IMAGE_FORMAT is not set +# CONFIG_AUTOBOOT is not set +# CONFIG_NET is not set +# CONFIG_INPUT is not set +# CONFIG_MTD is not set +# CONFIG_DM_ETH is not set +# CONFIG_EFI_LOADER is not set diff --git a/doc/board/index.rst b/doc/board/index.rst index 00e72f57cd..2bd740589b 100644 --- a/doc/board/index.rst +++ b/doc/board/index.rst @@ -13,6 +13,7 @@ Board-specific doc freescale/index google/index intel/index
- kendryte/index
We should use the board vendor name: sipeed/index>
That's what I thought, but everything else in this directory is organized by CPU manufacturer. For example, it is doc/board/sifive/fu450.rst, not hifive.rst. Hence the naming scheme below.
renesas/index sifive/index xilinx/indexdiff --git a/doc/board/kendryte/index.rst b/doc/board/kendryte/index.rst new file mode 100644 index 0000000000..5cbecd5731 --- /dev/null +++ b/doc/board/kendryte/index.rst @@ -0,0 +1,9 @@ +.. SPDX-License-Identifier: GPL-2.0+
+Kendryte
Sipeed
+========
+.. toctree::
- :maxdepth: 2
- k210
and use the board name here: maix, or k210-maix-bit ?
diff --git a/doc/board/kendryte/k210.rst b/doc/board/kendryte/k210.rst new file mode 100644 index 0000000000..14e0c22637 --- /dev/null +++ b/doc/board/kendryte/k210.rst @@ -0,0 +1,46 @@ +.. SPDX-License-Identifier: GPL-2.0+
+K210
k210-maix-bit ?
+====
+The Kendryte K210 processor is a 64-bit RISC-V CPU. This processor contains +several peripherals to accelerate neural network processing and other "ai" +tasks. This includes a "KPU" neural network processor, an audio processor +supporting beamforming reception, and a digital video port supporting capture +and output at VGA resolution. Other peripherals include 8M of sram (accessible +with and without caching); remappable pins, including 40 GPIOs; AES, FFT, and +SHA256 accelerators; a DMA controller; and I2C, I2S, and SPI controllers. Maix +peripherals vary, but include spi flash; on-board usb-serial bridges; ports for +cameras, displays, and sd cards; and ESP32 chips. Currently, only the Sipeed +Maix Bit V2.0 (bitm) is supported, but the boards are fairly similar.
+Documentation for Maix boards is located at http://dl.sipeed.com/MAIX/HDK/. +Documentation for the Kendryte K210 is located at +https://kendryte.com/downloads/. However, hardware details are rather lacking, +so most technical reference has been taken from the standalone sdk located at +https://github.com/kendryte/kendryte-standalone-sdk.
+Build and boot steps +--------------------
+To build u-boot, run
+make sipeed_maix_bit_defconfig +make CROSS_COMPILE=<your cross compile prefix>
+To flash u-boot to a maix bit, run +kflash -tp /dev/<your tty here> -B bit_mic u-boot-dtb.bin
+Boot output should look like the following:
+U-Boot 2020.01-00455-gad03fd83e1 (Jan 15 2020 - 17:10:24 -0500)
+DRAM: 8 MiB +MMC: spi@52000000:slot@0: 0 +In: serial@38000000 +Out: serial@38000000 +Err: serial@38000000 +=>
+Note that spi does not work! I will try to figure out how to make it work, but +for now the only way to boot something is to transfer it into ram over serial. diff --git a/include/configs/sipeed-maix.h b/include/configs/sipeed-maix.h new file mode 100644 index 0000000000..598f7dfdd0 --- /dev/null +++ b/include/configs/sipeed-maix.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/*
- Copyright (C) 2019 Sean Anderson seanga2@gmail.com
- */
+#ifndef CONFIGS_SIPEED_MAIX_H +#define CONFIGS_SIPEED_MAIX_H
+#include <linux/sizes.h>
+#define CONFIG_SYS_LOAD_ADDR 0x80000000 +#define CONFIG_SYS_SDRAM_BASE CONFIG_SYS_LOAD_ADDR +#define CONFIG_SYS_SDRAM_SIZE SZ_8M +/* Start just below AI memory */ +#define CONFIG_SYS_INIT_SP_ADDR 0x805FFFFF +#define CONFIG_SYS_MALLOC_LEN SZ_8K +#define CONFIG_SYS_CACHELINE_SIZE 64
+#endif /* CONFIGS_SIPEED_MAIX_H */
Regards, Bin
--Sean