Hi Sean, On Mon, Feb 3, 2020 at 4:11 AM Sean Anderson <sean...@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 <sean...@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 <sean...@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 y > + select GENERIC_RISCV > + select RISCV_PRIV_1_9_1 > + imply DM_SERIAL > + imply SIFIVE_SERIAL > + imply SIFIVE_CLINT > + imply CLK_CCF > + imply CLK_COMPOSITE_CCF > + imply CLK_K210 > + imply DM_RESET > + imply RESET_SYSCON > + imply SYSRESET > + imply SYSRESET_SYSCON > + imply SPI > + imply DESIGNWARE_SPI > + imply SPI_FLASH_GIGADEVICE > + imply MMC > + imply MMC_SPI > + imply MMC_BROKEN_CD > + imply 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 <sean...@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 <sean...@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 > renesas/index > sifive/index > xilinx/index > diff --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 <sean...@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