Linux内核添加HDF驱动子系统
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HDF驱动子系统是OpenHarmony重要的特色功能之一，其主要的功能是实现驱动程序在多内核多平台的物联网环境，实现一次驱动开发，多端部署。之前移植OHOS3.0使用了传统的linux驱动，比较遗憾，今天尝试将HDF驱动子系统加入编译框架。开始前先了解几个名词。 HCS(HDF Configuration Source)是 HDF 驱动框架的配置描述源码，JSON存储。 HC-GEN(HDF Configuration Generator)是 HCS 配置转换工具，可以将 HDF 配置文件HCS转换为二进制HCB。 HCB(HDF Configuration Binary)二进制文件，驱动可使用 HDF 框架提供的配置解析接口获取配置。 内核打补丁 如何在内核加入HDF驱动，linux内核下主要实现是下面两个目录： drivers/adapter/khdf/linux 和 drivers/framework 这两个目录是通过链接的方式加入到内核编译的，流程如下： kernel/linux/build/kernel.mk：75 $(hide) cd $(KERNEL_SRC_TMP_PATH) && patch -p1 < $(HDF_PATCH_FILE) && patch -p1 < $(DEVICE_PATCH_FILE) 可以参考3516的HDF补丁：kernel/linux/patches/linux-5.10/hi3516dv300_patch/hdf.patch # 添加到linux内核的补丁 drivers/hdf/framework -> /drivers/framework/ # 驱动子系统驱动框架、配置管理、配置解析、驱动通用框架模型、硬件通用平台能力接口等 drivers/hdf/khdf -> /drivers/adapter/khdf/linux/ # 在linux内核中部署OpenHarmony驱动框架 drivers/hdf/Makefile # 由hdf.patch提供 include/hdf -> /drivers/framework/include/ # 驱动框架对外提供能力的头文件 内核配置 只是打上补丁还不行，还得在内核的编译配置文件中加入HDF选项。最开始的做法就是参考3516的配置选择，但是发现有些配置会导致编译失败。测试发现下面的配置是可以编译成功的。 [*] Enable HDF manager (2) Set HDF support platform [*] Enable HDF platform driver [*] Enable HDF platform mipi dsi driver [*] Enable HDF platform gpio driver [*] Enable HDF platform i2c driver [*] Enable HDF platform watchdog driver [*] hi35xx pwm driver [*] Enable HDF platform pwm driver [*] Enable HDF platform uart driver [ ] Enable HDF platform sdio driver [ ] Enable HDF platform emmc driver [*] Enable HDF platform mmc driver [*] Enable HDF platform spi driver [*] Enable HDF platform rtc driver [*] Enable HDF linux test [*] Enable HDF Display driver [ ] Enable HDF Lcdkit driver [*] Enable HDF Icn9700 driver [ ] Enable HDF St7789 driver [*] Enable HDF input driver [*] Enable HDF tp 5P5 GT911 driver [*] Enable HDF tp 2P35 FT6236 driver [ ] Enable HDF wifi [ ] Enable HDF Bluetooth [*] Enable HDF sensor driver [ ] Enable HDF accel sensor driver [ ] Enable HDF gyro sensor driver [ ] Enable HDF barometer sensor driver [ ] Enable HDF hall sensor driver [*] Enable HDF storage driver [ ] Enable HDF USB PNP Notify driver [ ] Enable F_GENERIC driver [ ] Enable HDF Audio driver [*] Enable HDF vibrator driver [*] Enable HDF linear vibrator driver [ ] Enable HDF dsoftbus driver CONFIG_DRIVERS_HDF=y CONFIG_HDF_SUPPORT_LEVEL=2 CONFIG_DRIVERS_HDF_PLATFORM=y CONFIG_DRIVERS_HDF_PLATFORM_MIPI_DSI=y CONFIG_DRIVERS_HDF_PLATFORM_GPIO=y CONFIG_DRIVERS_HDF_PLATFORM_I2C=y CONFIG_DRIVERS_HDF_PLATFORM_WATCHDOG=y CONFIG_PWM_HI35XX=y CONFIG_DRIVERS_HDF_PLATFORM_PWM=y CONFIG_DRIVERS_HDF_PLATFORM_UART=y # CONFIG_DRIVERS_HDF_PLATFORM_SDIO is not set # CONFIG_DRIVERS_HDF_PLATFORM_EMMC is not set CONFIG_DRIVERS_HDF_PLATFORM_MMC=y CONFIG_DRIVERS_HDF_PLATFORM_SPI=y CONFIG_DRIVERS_HDF_PLATFORM_RTC=y CONFIG_DRIVERS_HDF_TEST=y CONFIG_DRIVERS_HDF_DISP=y # CONFIG_DRIVERS_HDF_LCDKIT is not set CONFIG_DRIVERS_HDF_LCD_ICN9700=y # CONFIG_DRIVERS_HDF_LCD_ST7789 is not set CONFIG_DRIVERS_HDF_INPUT=y CONFIG_DRIVERS_HDF_TP_5P5_GT911=y CONFIG_DRIVERS_HDF_TP_2P35_FT6236=y # CONFIG_DRIVERS_HDF_WIFI is not set # CONFIG_DRIVERS_HDF_BT is not set CONFIG_DRIVERS_HDF_SENSOR=y # CONFIG_DRIVERS_HDF_SENSOR_ACCEL is not set # CONFIG_DRIVERS_HDF_SENSOR_GYRO is not set # CONFIG_DRIVERS_HDF_SENSOR_BAROMETER is not set # CONFIG_DRIVERS_HDF_SENSOR_HALL is not set CONFIG_DRIVERS_HDF_STORAGE=y # CONFIG_DRIVERS_HDF_USB_PNP_NOTIFY is not set # CONFIG_DRIVERS_HDF_USB_F_GENERIC is not set # CONFIG_DRIVERS_HDF_AUDIO is not set CONFIG_DRIVERS_HDF_VIBRATOR=y CONFIG_DRIVERS_HDF_VIBRATOR_LINEAR=y # CONFIG_DRIVERS_HDF_DSOFTBUS is not set # end of Device Drivers [*] Enable HDF linux test 是需要设置的，如果没有设置CONFIG_DRIVERS_HDF_TEST，目录结构就出问题了，会报这样的错误。 drivers/hdf/khdf/Makefile:22: PRODUCT_PATH=vendor/raspberrypi/RPI4B scripts/Makefile.build:44: drivers/hdf/khdf/../../../../vendor/raspberrypi/RPI4B/hdf_config/Makefile: No such file or directory make[5]: *** No rule to make target 'drivers/hdf/khdf/../../../../vendor/raspberrypi/RPI4B/hdf_config/Makefile'. Stop. CC [M] drivers/net/wireless/mac80211_hwsim.o make[4]: *** [scripts/Makefile.build:497: drivers/hdf/khdf/../../../../vendor/raspberrypi/RPI4B/hdf_config] Error 2 make[3]: *** [scripts/Makefile.build:497: drivers/hdf/khdf] Error 2 make[2]: *** [scripts/Makefile.build:497: drivers/hdf] Error 2 make[2]: *** Waiting for unfinished jobs.... 下面3个选项要关闭，不然会报下面的错误。 [ ] Enable HDF platform sdio driver [ ] Enable HDF platform emmc driver [ ] Enable HDF wifi drivers/../../../../../../drivers/adapter/khdf/linux/platform/sdio/sdio_adapter.o: In function `Hi35xxLinuxSdioRescan': sdio_adapter.c:(.text+0x20): undefined reference to `hisi_sdio_rescan' sdio_adapter.c:(.text+0x34): undefined reference to `himci_get_mmc_host' drivers/../../../../../../drivers/adapter/khdf/linux/platform/sdio/sdio_adapter.o: In function `Hi35xxLinuxSdioFindFunc': sdio_adapter.c:(.text+0xc84): undefined reference to `himci_get_mmc_host' sdio_adapter.c:(.text+0xc9c): undefined reference to `himci_get_mmc_host' sdio_adapter.c:(.text+0xcb4): undefined reference to `himci_get_mmc_host'drivers/../../../../../../drivers/adapter/khdf/linux/platform/emmc/emmc_adapter.o: In function `Hi35xxLinuxEmmcBind': emmc_adapter.c:(.text+0x214): undefined reference to `himci_get_mmc_host'drivers/../../../../../../device/hisilicon/drivers/wifi/driver/hi3881/oal/oal_sdio_host.o: In function `sdio_card_detect_change': oal_sdio_host.c:(.text+0x2ce8): undefined reference to `hisi_sdio_rescan' make[1]: *** [Makefile:1179: vmlinux] Error 1 make[1]: Leaving directory '/home/liangzili/ohos/out/KERNEL_OBJ/kernel/src_tmp/linux-5.10' make: *** [kernel.mk:80: /home/liangzili/ohos/out/KERNEL_OBJ/kernel/src_tmp/linux-5.10/arch/arm/boot/zImage] Error 2 ninja: build stopped: subcommand failed. 编译过程 为了方便测试可以单独进行内核编译，比如我的编译命令是这样的。 可以分析下HDF这部分的编译过程。 linux-5.10/drivers/hdf/Makefile，hdf.patch会添加这个Makefile，将khdf文件夹加入编译。 obj-$(CONFIG_DRIVERS_HDF) += khdf/ linux-5.10/drivers/hdf/khdf/Makefile export HDF_ROOT := drivers/hdf obj-$(CONFIG_DRIVERS_HDF) += osal/ obj-$(CONFIG_DRIVERS_HDF) += network/ obj-$(CONFIG_DRIVERS_HDF) += config/ SUPPORT_LEVEL_STD_H := $(shell [ "$(CONFIG_HDF_SUPPORT_LEVEL)" -ge 2 ] && echo true) $(warning PRODUCT_PATH=$(PRODUCT_PATH)) # 会检查PRODUCT_PATH变量 ifeq ($(PRODUCT_PATH),) $(error PRODUCT_PATH not) endif # 这里有条注释指明了*.hcs配置文件的存放路径 # for L2+, hcs config should in vendor/product_company/product_name/config/khdf ifeq ($(SUPPORT_LEVEL_STD_H), true) SUB_DIR:=khdf/ endif # HDF test的配置会使hcs目录结构不一样，我当时没有设置CONFIG_DRIVERS_HDF_TEST就掉这个坑里了。 ifeq ($(CONFIG_DRIVERS_HDF), y) ifeq ($(CONFIG_DRIVERS_HDF_TEST), y) obj-$(CONFIG_DRIVERS_HDF) += ../../../../$(PRODUCT_PATH)/hdf_config/$(SUB_DIR)/hdf_test/ obj-$(CONFIG_DRIVERS_HDF) += test/ else obj-$(CONFIG_DRIVERS_HDF) += ../../../../$(PRODUCT_PATH)/hdf_config/$(SUB_DIR) endif endif # ... 后面按照配置添加一些编译目录 ... drivers/adapter/khdf/linux/Makefile：会调用 obj-(CONFIG_DRIVERS_HDF) += ../../../../(CONFIGDRIVERSHDF)+=../../../../(PRODUCT_PATH)/hdf_config/$(SUB_DIR)/hdf_test/ 这是OHOS3.0默认的HCS文件存放路径。官方的注释也说明了，所以将设备对应的*.hcs存放到 vendor/raspberrypi/RPI4B/hdf_config/khdf 文件夹，参考 3516 的 vendor/hisilicon/Hi3516DV300/hdf_config/khdf/hdf.hcs 就可了。 #include "device_info/device_info.hcs" #include "platform/i2c_config.hcs" #include "platform/hi35xx_watchdog_config.hcs" #include "platform/hi35xx_pwm_config.hcs" #include "platform/hi35xx_uart_config.hcs" #include "platform/sdio_config.hcs" #include "platform/emmc_config.hcs" #include "platform/hi35xx_spi_config.hcs" #include "input/input_config.hcs" #include "wifi/wlan_platform.hcs" #include "wifi/wlan_chip_hi3881.hcs" #include "sensor/sensor_config.hcs" #include "audio/audio_config.hcs" #include "audio/codec_config.hcs" #include "audio/dai_config.hcs" #include "audio/dma_config.hcs" #include "audio/dsp_config.hcs" #include "vibrator/vibrator_config.hcs" #include "vibrator/linear_vibrator_config.hcs" #include "lcd/lcd_config.hcs" root { module = "hisilicon,hi35xx_chip"; } 参考 3516 的 vendor/hisilicon/Hi3516DV300/hdf_config/khdf/Makefile 其中：PRODUCT_PATH环境变量的来源：kernel/linux/build/kernel_module_build.sh:42:export PRODUCT_PATH=$4 ifeq ($(LOCAL_HCS_ROOT),) LOCAL_HCS_ROOT := $(PRODUCT_PATH) endif SOURCE_ROOT:=$(abspath ../../../../../) HC_GEN_DIR := $(abspath $(SOURCE_ROOT)/drivers/framework/tools/hc-gen) HC_GEN := $(HC_GEN_DIR)/build/hc-gen LOCAL_HCS_ROOT := $(abspath $(dir $(realpath $(lastword $(MAKEFILE_LIST))))) HCS_DIR := $(LOCAL_HCS_ROOT) ifneq ($(TARGET_BOARD_PLATFORM),) HCS_DIR := $(LOCAL_HCS_ROOT)/$(TARGET_BOARD_PLATFORM) else ifneq ($(CONFIG_ARCH_HI3516DV300),) HCS_DIR := $(LOCAL_HCS_ROOT) endif ifneq ($(CONFIG_ARCH_HI3518EV300),) HCS_DIR := $(LOCAL_HCS_ROOT) endif endif $(info HCS_DIR = $(HCS_DIR)) HCB_FLAGS := -b -i -a HCS_OBJ := hdf_hcs_hex.o HCS_OBJ_SRC := $(subst .o,.c,$(notdir $(HCS_OBJ))) CONFIG_GEN_HEX_SRC := $(addprefix $(LOCAL_HCS_ROOT)/, $(HCS_OBJ_SRC)) CONFIG_HCS_SRC := $(subst _hcs_hex.o,.hcs,$(addprefix $(HCS_DIR)/, $(HCS_OBJ))) $(obj)/$(HCS_OBJ): $(CONFIG_GEN_HEX_SRC) $(Q)$(CC) $(c_flags) -c -o $@ $< $(Q)rm -f $< $(CONFIG_GEN_HEX_SRC): $(LOCAL_HCS_ROOT)/%_hcs_hex.c: $(HCS_DIR)/%.hcs | $(HC_GEN) $(Q)echo gen hdf built-in config $(Q)if [ ! -d $(dir $@) ]; then mkdir -p $(dir $@); fi $(Q)$(HC_GEN) $(HCB_FLAGS) -o $(subst _hex.c,,$(@)) $< $(CONFIG_GEN_SRCS): $(CONFIG_OUT_DIR)%.c: $(HCS_DIR)/%.hcs | $(HC_GEN) $(Q)echo gen hdf driver config $(Q)if [ ! -d $(dir $@) ]; then mkdir -p $(dir $@); fi $(Q)$(HC_GEN) -t -o $@ $< $(HC_GEN): $(HIDE)make -C $(HC_GEN_DIR) obj-$(CONFIG_DRIVERS_HDF) += $(HCS_OBJ) （编辑：银川站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
