@@ -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"
new file mode 100644
@@ -0,0 +1,47 @@
+# SPDX-License-Identifier: GPL-2.0+
+# Copyright (C) 2019-20 Sean Anderson <seanga2 at 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 y
+ select GENERIC_RISCV
+ select RISCV_PRIV_1_9
+ imply SMP
+ imply DM_SERIAL
+ imply SIFIVE_SERIAL
+ imply SIFIVE_CLINT
+ imply POWER_DOMAIN
+ imply SIMPLE_PM_BUS
+ imply CLK_CCF
+ imply CLK_COMPOSITE_CCF
+ imply CLK_K210
+ imply DM_RESET
+ imply RESET_SYSCON
+ imply SYSRESET
+ imply SYSRESET_SYSCON
+endif
new file mode 100644
@@ -0,0 +1,11 @@
+Sipeed Maix BOARD
+M: Sean Anderson <seanga2 at 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_bitm_defconfig
+F: doc/board/sipeed/
+F: include/configs/sipeed-maix.h
+F: include/dt-bindings/*/k210-sysctl.h
+F: test/dm/k210_pll.c
new file mode 100644
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (c) 2019 Western Digital Corporation or its affiliates.
+
+obj-y += maix.o
new file mode 100644
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019-20 Sean Anderson <seanga2 at gmail.com>
+ */
+
+#include <common.h>
+#include <clk.h>
+#include <dm.h>
+#include <fdt_support.h>
+#include <asm/io.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;
+}
new file mode 100644
@@ -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
new file mode 100644
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2019-20 Sean Anderson <seanga2 at 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 */
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 at gmail.com> --- Changes in v9: - Update MAINTAINERS to reflect defconfig name change Changes in v8: - Remove unnecessary fdt fixup for sipeed maix 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 | 47 ++++++++++++++++++++++++++++++ board/sipeed/maix/MAINTAINERS | 11 +++++++ board/sipeed/maix/Makefile | 5 ++++ board/sipeed/maix/maix.c | 41 ++++++++++++++++++++++++++ configs/sipeed_maix_bitm_defconfig | 8 +++++ include/configs/sipeed-maix.h | 24 +++++++++++++++ 7 files changed, 140 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