Hi Sean
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 board f
Please remove "board f"
Changes in v7:
- Split docs off into their own patch
- Enable ram clocks by name
Changes in v6:
- Remove trailing whitespace from documentation
- Remove configuration for spi/pinmux/gpio features
- Flesh out documentation some more
Changes in v5:
- Configure relocation location with CONFIG_SYS_SDRAM_*
- Enable ram clocks
- Add pinmux/gpio/led support
- Remove (broken) MMC support
- Store the environment in flash
- Add partitions
- Add bootcmd
- Add docs for pinctrl and booting
Changes in v4:
- Rework documentation to be organized by board mfg not cpu mfg
- Update docs to reflect working SPI support
- Add proper spi support
- Don't define unneecessary macros in config.h
- Lower the default stack so it isn't clobbered on relocation
- Update MAINTAINERS
- Update copyright
Changes in 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 in 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 | 48 ++++++++++++++++++++++++++ board/sipeed/maix/MAINTAINERS | 11 ++++++ board/sipeed/maix/Makefile | 5 +++ board/sipeed/maix/maix.c | 54 ++++++++++++++++++++++++++++++ configs/sipeed_maix_bitm_defconfig | 8 +++++ include/configs/sipeed-maix.h | 24 +++++++++++++ 7 files changed, 154 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 include/configs/sipeed-maix.h
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index b7a5757584..d016dd75d7 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..8292089fc9 --- /dev/null +++ b/board/sipeed/maix/Kconfig @@ -0,0 +1,48 @@ +# SPDX-License-Identifier: GPL-2.0+ +# Copyright (C) 2019-20 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 3+config BOARD_SPECIFIC_OPTIONS
def_bool yselect GENERIC_RISCVselect RISCV_PRIV_1_9imply SMPimply OF_BOARD_SETUPimply DM_SERIALimply SIFIVE_SERIALimply SIFIVE_CLINTimply POWER_DOMAINimply SIMPLE_PM_BUSimply CLK_CCFimply CLK_COMPOSITE_CCFimply CLK_K210imply DM_RESETimply RESET_SYSCONimply SYSRESETimply SYSRESET_SYSCON+endif diff --git a/board/sipeed/maix/MAINTAINERS b/board/sipeed/maix/MAINTAINERS new file mode 100644 index 0000000000..1f33882e1e --- /dev/null +++ b/board/sipeed/maix/MAINTAINERS @@ -0,0 +1,11 @@ +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: doc/board/sipeed/ +F: include/configs/sipeed-maix.h +F: include/dt-bindings/*/k210-sysctl.h +F: test/dm/k210_pll.c 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..f5ed54c70f --- /dev/null +++ b/board/sipeed/maix/maix.c @@ -0,0 +1,54 @@ +// SPDX-License-Identifier: GPL-2.0+ +/*
- Copyright (C) 2019-20 Sean Anderson seanga2@gmail.com
- */
+#include <common.h> +#include <clk.h> +#include <dm.h> +#include <fdt_support.h>
+phys_size_t get_effective_memsize(void) +{
return CONFIG_SYS_SDRAM_SIZE;+}
+int board_init(void) +{
int ret, i;const char * const banks[] = { "sram0", "sram1", "airam" };ofnode memory;struct clk clk;/* Enable RAM clocks */memory = ofnode_by_compatible(ofnode_null(), "kendryte,k210-sram");if (ofnode_equal(memory, ofnode_null()))return -ENOENT;for (i = 0; i < ARRAY_SIZE(banks); i++) {ret = clk_get_by_name_nodev(memory, banks[i], &clk);if (ret)continue;ret = clk_enable(&clk);clk_free(&clk);if (ret)return ret;}return 0;+}
+int ft_board_setup(void *blob, bd_t *bd) +{
int i;u64 base[CONFIG_NR_DRAM_BANKS];u64 size[CONFIG_NR_DRAM_BANKS];for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {base[i] = bd->bi_dram[i].start;size[i] = bd->bi_dram[i].size;}return fdt_fixup_memory_banks(blob, base, size, CONFIG_NR_DRAM_BANKS);+} diff --git a/configs/sipeed_maix_bitm_defconfig b/configs/sipeed_maix_bitm_defconfig new file mode 100644 index 0000000000..f48f7f06e9 --- /dev/null +++ b/configs/sipeed_maix_bitm_defconfig @@ -0,0 +1,8 @@ +CONFIG_RISCV=y +CONFIG_TARGET_SIPEED_MAIX=y +CONFIG_ARCH_RV64I=y +CONFIG_SYS_REDUNDAND_ENVIRONMENT=y +# CONFIG_NET is not set +# CONFIG_INPUT is not set +# CONFIG_DM_ETH is not set +# CONFIG_EFI_LOADER is not set diff --git a/include/configs/sipeed-maix.h b/include/configs/sipeed-maix.h new file mode 100644 index 0000000000..a46473fc78 --- /dev/null +++ b/include/configs/sipeed-maix.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/*
- Copyright (C) 2019-20 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 +/* Start just below the second bank so we don't clobber it during reloc */ +#define CONFIG_SYS_INIT_SP_ADDR 0x803FFFFF +#define CONFIG_SYS_MALLOC_LEN SZ_128K +#define CONFIG_SYS_CACHELINE_SIZE 64
+#define CONFIG_SYS_SDRAM_BASE 0x80000000 +/* Don't relocate into AI ram since it isn't set up yet */ +#define CONFIG_SYS_SDRAM_SIZE (SZ_4M + SZ_2M)
+/* For early init */ +#define K210_SYSCTL_BASE 0x50440000
+#endif /* CONFIGS_SIPEED_MAIX_H */
2.25.1