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前言
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
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$(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
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patching file drivers/Kconfig
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patching file drivers/Makefile
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patching file drivers/hdf/Makefile
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patching symbolic link drivers/hdf/framework
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patching symbolic link drivers/hdf/khdf
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patching symbolic link include/hdf
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# 添加到linux内核的补丁
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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
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drivers/hdf/khdf -> /drivers/adapter/khdf/linux/ # 在linux内核中部署OpenHarmony驱动框架
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drivers/hdf/Makefile # 由hdf.patch提供
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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。
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- Enable HDF manager
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(2) Set HDF support platform
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- Enable HDF platform driver
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- Enable HDF platform mipi dsi driver
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- Enable HDF platform gpio driver
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- Enable HDF platform i2c driver
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- Enable HDF platform watchdog driver
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- hi35xx pwm driver
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- Enable HDF platform pwm driver
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- Enable HDF platform uart driver
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[ ] Enable HDF platform sdio driver
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[ ] Enable HDF platform emmc driver
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- Enable HDF platform mmc driver
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- Enable HDF platform spi driver
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- Enable HDF platform rtc driver
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- Enable HDF linux test
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- Enable HDF Display driver
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[ ] Enable HDF Lcdkit driver
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- Enable HDF Icn9700 driver
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[ ] Enable HDF St7789 driver
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- Enable HDF input driver
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- Enable HDF tp 5P5 GT911 driver
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- Enable HDF tp 2P35 FT6236 driver
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[ ] Enable HDF wifi
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[ ] Enable HDF Bluetooth
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- Enable HDF sensor driver
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[ ] Enable HDF accel sensor driver
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[ ] Enable HDF gyro sensor driver
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[ ] Enable HDF barometer sensor driver
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[ ] Enable HDF hall sensor driver
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- Enable HDF storage driver
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[ ] Enable HDF USB PNP Notify driver
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[ ] Enable F_GENERIC driver
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[ ] Enable HDF Audio driver
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- Enable HDF vibrator driver
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- Enable HDF linear vibrator driver
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[ ] Enable HDF dsoftbus driver
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CONFIG_DRIVERS_HDF=y
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CONFIG_HDF_SUPPORT_LEVEL=2
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CONFIG_DRIVERS_HDF_PLATFORM=y
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CONFIG_DRIVERS_HDF_PLATFORM_MIPI_DSI=y
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CONFIG_DRIVERS_HDF_PLATFORM_GPIO=y
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CONFIG_DRIVERS_HDF_PLATFORM_I2C=y
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CONFIG_DRIVERS_HDF_PLATFORM_WATCHDOG=y
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CONFIG_PWM_HI35XX=y
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CONFIG_DRIVERS_HDF_PLATFORM_PWM=y
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CONFIG_DRIVERS_HDF_PLATFORM_UART=y
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# CONFIG_DRIVERS_HDF_PLATFORM_SDIO is not set
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# CONFIG_DRIVERS_HDF_PLATFORM_EMMC is not set
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CONFIG_DRIVERS_HDF_PLATFORM_MMC=y
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CONFIG_DRIVERS_HDF_PLATFORM_SPI=y
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CONFIG_DRIVERS_HDF_PLATFORM_RTC=y
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CONFIG_DRIVERS_HDF_TEST=y
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CONFIG_DRIVERS_HDF_DISP=y
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# CONFIG_DRIVERS_HDF_LCDKIT is not set
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CONFIG_DRIVERS_HDF_LCD_ICN9700=y
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# CONFIG_DRIVERS_HDF_LCD_ST7789 is not set
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CONFIG_DRIVERS_HDF_INPUT=y
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CONFIG_DRIVERS_HDF_TP_5P5_GT911=y
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CONFIG_DRIVERS_HDF_TP_2P35_FT6236=y
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# CONFIG_DRIVERS_HDF_WIFI is not set
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# CONFIG_DRIVERS_HDF_BT is not set
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CONFIG_DRIVERS_HDF_SENSOR=y
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# CONFIG_DRIVERS_HDF_SENSOR_ACCEL is not set
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# CONFIG_DRIVERS_HDF_SENSOR_GYRO is not set
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# CONFIG_DRIVERS_HDF_SENSOR_BAROMETER is not set
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# CONFIG_DRIVERS_HDF_SENSOR_HALL is not set
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CONFIG_DRIVERS_HDF_STORAGE=y
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# CONFIG_DRIVERS_HDF_USB_PNP_NOTIFY is not set
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# CONFIG_DRIVERS_HDF_USB_F_GENERIC is not set
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# CONFIG_DRIVERS_HDF_AUDIO is not set
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CONFIG_DRIVERS_HDF_VIBRATOR=y
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CONFIG_DRIVERS_HDF_VIBRATOR_LINEAR=y
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# CONFIG_DRIVERS_HDF_DSOFTBUS is not set
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# 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。
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drivers/hdf/khdf/Makefile:22: PRODUCT_PATH=vendor/raspberrypi/RPI4B
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scripts/Makefile.build:44: drivers/hdf/khdf/../../../../vendor/raspberrypi/RPI4B/hdf_config/Makefile: No such file or directory
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make[5]: *** No rule to make target 'drivers/hdf/khdf/../../../../vendor/raspberrypi/RPI4B/hdf_config/Makefile'. Stop.
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CC [M] drivers/net/wireless/mac80211_hwsim.o
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make[4]: *** [scripts/Makefile.build:497: drivers/hdf/khdf/../../../../vendor/raspberrypi/RPI4B/hdf_config] Error 2
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make[3]: *** [scripts/Makefile.build:497: drivers/hdf/khdf] Error 2
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make[2]: *** [scripts/Makefile.build:497: drivers/hdf] Error 2
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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
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drivers/../../../../../../drivers/adapter/khdf/linux/platform/sdio/sdio_adapter.o: In function `Hi35xxLinuxSdioRescan':
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sdio_adapter.c:(.text+0x20): undefined reference to `hisi_sdio_rescan'
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sdio_adapter.c:(.text+0x34): undefined reference to `himci_get_mmc_host'
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drivers/../../../../../../drivers/adapter/khdf/linux/platform/sdio/sdio_adapter.o: In function `Hi35xxLinuxSdioFindFunc':
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sdio_adapter.c:(.text+0xc84): undefined reference to `himci_get_mmc_host'
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sdio_adapter.c:(.text+0xc9c): undefined reference to `himci_get_mmc_host'
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sdio_adapter.c:(.text+0xcb4): undefined reference to `himci_get_mmc_host'
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drivers/../../../../../../drivers/adapter/khdf/linux/platform/emmc/emmc_adapter.o: In function `Hi35xxLinuxEmmcBind':
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emmc_adapter.c:(.text+0x214): undefined reference to `himci_get_mmc_host'
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drivers/../../../../../../device/hisilicon/drivers/wifi/driver/hi3881/oal/oal_sdio_host.o: In function `sdio_card_detect_change':
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oal_sdio_host.c:(.text+0x2ce8): undefined reference to `hisi_sdio_rescan'
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make[1]: *** [Makefile:1179: vmlinux] Error 1
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make[1]: Leaving directory '/home/liangzili/ohos/out/KERNEL_OBJ/kernel/src_tmp/linux-5.10'
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make: *** [kernel.mk:80: /home/liangzili/ohos/out/KERNEL_OBJ/kernel/src_tmp/linux-5.10/arch/arm/boot/zImage] Error 2
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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。
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./build.sh
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。
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obj-$(CONFIG_DRIVERS_HDF) += khdf/
linux-5.10\drivers\hdf\khdf\Makefile
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export HDF_ROOT := drivers/hdf
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obj-$(CONFIG_DRIVERS_HDF) += osal/
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obj-$(CONFIG_DRIVERS_HDF) += network/
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obj-$(CONFIG_DRIVERS_HDF) += config/
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SUPPORT_LEVEL_STD_H := $(shell [ "$(CONFIG_HDF_SUPPORT_LEVEL)" -ge 2 ] && echo true)
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$(warning PRODUCT_PATH=$(PRODUCT_PATH)) # 会检查PRODUCT_PATH变量
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ifeq ($(PRODUCT_PATH),)
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$(error PRODUCT_PATH not)
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endif
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# 这里有条注释指明了*.hcs配置文件的存放路径
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# for L2+, hcs config should in vendor/product_company/product_name/config/khdf
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ifeq ($(SUPPORT_LEVEL_STD_H), true)
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SUB_DIR:=khdf/
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endif
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# HDF test的配置会使hcs目录结构不一样,我当时没有设置CONFIG_DRIVERS_HDF_TEST就掉这个坑里了。
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ifeq ($(CONFIG_DRIVERS_HDF), y)
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ifeq ($(CONFIG_DRIVERS_HDF_TEST), y)
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obj-$(CONFIG_DRIVERS_HDF) += ../../../../$(PRODUCT_PATH)/hdf_config/$(SUB_DIR)/hdf_test/
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obj-$(CONFIG_DRIVERS_HDF) += test/
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else
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obj-$(CONFIG_DRIVERS_HDF) += ../../../../$(PRODUCT_PATH)/hdf_config/$(SUB_DIR)
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endif
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endif
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# ... 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。
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#include "device_info/device_info.hcs"
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#include "platform/i2c_config.hcs"
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#include "platform/hi35xx_watchdog_config.hcs"
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#include "platform/hi35xx_pwm_config.hcs"
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#include "platform/hi35xx_uart_config.hcs"
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#include "platform/sdio_config.hcs"
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#include "platform/emmc_config.hcs"
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#include "platform/hi35xx_spi_config.hcs"
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#include "input/input_config.hcs"
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#include "wifi/wlan_platform.hcs"
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#include "wifi/wlan_chip_hi3881.hcs"
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#include "sensor/sensor_config.hcs"
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#include "audio/audio_config.hcs"
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#include "audio/codec_config.hcs"
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#include "audio/dai_config.hcs"
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#include "audio/dma_config.hcs"
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#include "audio/dsp_config.hcs"
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#include "vibrator/vibrator_config.hcs"
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#include "vibrator/linear_vibrator_config.hcs"
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#include "lcd/lcd_config.hcs"
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root {
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module = "hisilicon,hi35xx_chip";
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}
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=$4
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ifeq ($(LOCAL_HCS_ROOT),)
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LOCAL_HCS_ROOT := $(PRODUCT_PATH)
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endif
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SOURCE_ROOT:=$(abspath ../../../../../)
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HC_GEN_DIR := $(abspath $(SOURCE_ROOT)/drivers/framework/tools/hc-gen)
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HC_GEN := $(HC_GEN_DIR)/build/hc-gen
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LOCAL_HCS_ROOT := $(abspath $(dir $(realpath $(lastword $(MAKEFILE_LIST)))))
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HCS_DIR := $(LOCAL_HCS_ROOT)
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ifneq ($(TARGET_BOARD_PLATFORM),)
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HCS_DIR := $(LOCAL_HCS_ROOT)/$(TARGET_BOARD_PLATFORM)
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else
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ifneq ($(CONFIG_ARCH_HI3516DV300),)
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HCS_DIR := $(LOCAL_HCS_ROOT)
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endif
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ifneq ($(CONFIG_ARCH_HI3518EV300),)
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HCS_DIR := $(LOCAL_HCS_ROOT)
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endif
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endif
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$(info HCS_DIR = $(HCS_DIR))
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HCB_FLAGS := -b -i -a
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HCS_OBJ := hdf_hcs_hex.o
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HCS_OBJ_SRC := $(subst .o,.c,$(notdir $(HCS_OBJ)))
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CONFIG_GEN_HEX_SRC := $(addprefix $(LOCAL_HCS_ROOT)/, $(HCS_OBJ_SRC))
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CONFIG_HCS_SRC := $(subst _hcs_hex.o,.hcs,$(addprefix $(HCS_DIR)/, $(HCS_OBJ)))
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$(obj)/$(HCS_OBJ): $(CONFIG_GEN_HEX_SRC)
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$(Q)$(CC) $(c_flags) -c -o $@ $<
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$(Q)rm -f $<
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$(CONFIG_GEN_HEX_SRC): $(LOCAL_HCS_ROOT)/%_hcs_hex.c: $(HCS_DIR)/%.hcs | $(HC_GEN)
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$(Q)echo gen hdf built-in config
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$(Q)if [ ! -d $(dir $@) ]; then mkdir -p $(dir $@); fi
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$(Q)$(HC_GEN) $(HCB_FLAGS) -o $(subst _hex.c,,$(@)) $<
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$(CONFIG_GEN_SRCS): $(CONFIG_OUT_DIR)%.c: $(HCS_DIR)/%.hcs | $(HC_GEN)
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$(Q)echo gen hdf driver config
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$(Q)if [ ! -d $(dir $@) ]; then mkdir -p $(dir $@); fi
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$(Q)$(HC_GEN) -t -o $@ $<
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$(HC_GEN):
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$(HIDE)make -C $(HC_GEN_DIR)
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obj-$(CONFIG_DRIVERS_HDF) += $(HCS_OBJ)
查看结果
编译完成后,可以上传内核镜像到开发板,来查看HDF驱动框架是否启动成功。
加入HDF前:
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# ls dev/
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__parameters__ hwrng tty1 tty28 tty46 tty7
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__trigger__ input tty10 tty29 tty47 tty8
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autofs kmsg tty11 tty3 tty48 tty9
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binder linux,cma tty12 tty30 tty49 ttyAMA0
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block loop-control tty13 tty31 tty5 ttyS0
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bus mem tty14 tty32 tty50 ttyprintk
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cachefiles memcg tty15 tty33 tty51 unix
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char null tty16 tty34 tty52 urandom
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console port tty17 tty35 tty53 vchiq
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cpuctl ptmx tty18 tty36 tty54 vcs
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cpuset pts tty19 tty37 tty55 vcs1
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dri random tty2 tty38 tty56 vcsa
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fd rawctl tty20 tty39 tty57 vcsa1
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freezer snd tty21 tty4 tty58 vcsu
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fscklogs stderr tty22 tty40 tty59 vcsu1
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full stdin tty23 tty41 tty6 vga_arbiter
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gpiochip0 stdout tty24 tty42 tty60 vndbinder
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gpiochip1 system tty25 tty43 tty61 watchdog
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graphics tty tty26 tty44 tty62 watchdog0
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hwbinder tty0 tty27 tty45 tty63 zero
加入HDF后:
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# ls dev/
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HDF_PLATFORM_I2C_MANAGER loop-control tty24 tty54
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HDF_PLATFORM_UART_1 mem tty25 tty55
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HDF_TEST memcg tty26 tty56
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I2C_TEST null tty27 tty57
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__parameters__ port tty28 tty58
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__trigger__ ptmx tty29 tty59
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autofs pts tty3 tty6
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binder random tty30 tty60
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block rawctl tty31 tty61
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bus sample_service tty32 tty62
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cachefiles snd tty33 tty63
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char stderr tty34 tty7
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console stdin tty35 tty8
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cpuctl stdout tty36 tty9
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cpuset system tty37 ttyAMA0
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dev_mgr tty tty38 ttyS0
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dri tty0 tty39 ttyprintk
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fd tty1 tty4 unix
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freezer tty10 tty40 urandom
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fscklogs tty11 tty41 vchiq
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full tty12 tty42 vcs
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gpiochip0 tty13 tty43 vcs1
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gpiochip1 tty14 tty44 vcsa
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graphics tty15 tty45 vcsa1
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hdf_bl tty16 tty46 vcsu
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hdf_input_host tty17 tty47 vcsu1
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hdf_misc_vibrator tty18 tty48 vga_arbiter
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hdf_sensor_manager_ap tty19 tty49 vndbinder
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hwbinder tty2 tty5 watchdog
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hwrng tty20 tty50 watchdog0
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input tty21 tty51 zero
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kmsg tty22 tty52
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linux,cma tty23 tty53
基本算是启动成功了,接下来考虑打算用HDF的方式添加一下设备。来验证HDF驱动框架是否运转正常。
原文链接:https://harmonyos.51cto.com |