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本文章是基于瑞芯微RK3568芯片的DAYU200开辟板,举行标准系统相关功能的移植,主要包罗产物配置添加,内核启动、升级,音频ADM化,Camera,TP,LCD,WIFI,BT,vibrator、sensor、图形显示模块的适配案例总结,以及相关功能的适配。
产物配置和目次规划
产物配置
在产物//productdefine/common/device目次下创建以rk3568名字定名的json文件,并指定CPU的架构。//productdefine/common/device/rk3568.json配置如下:
- {
- "device_name": "rk3568",
- "device_company": "rockchip",
- "target_os": "ohos",
- "target_cpu": "arm",
- "kernel_version": "",
- "device_build_path": "device/board/hihope/rk3568",
- "enable_ramdisk": true, //是否支持ramdisk二级启动
- "build_selinux": true // 是否支持selinux权限管理
- }
复制代码 在//productdefine/common/products目次下创建以产物名定名的rk3568.json文件。该文件用于形貌产物所使用的SOC 以及所需的子系统。配置如下
- {
- "product_name": "rk3568",
- "product_company" : "hihope",
- "product_device": "rk3568",
- "version": "2.0",
- "type": "standard",
- "parts":{
- "ace:ace_engine_standard":{},
- "ace:napi":{},
- ...
- "xts:phone_tests":{}
- }
- }
复制代码 主要的配置内容包罗:
1.product_device:配置所使用的SOC。
2.type:配置系统的级别, 这里直接standard即可。
3.parts:系统必要启用的子系统。子系统可以简单理解为一块独立构建的功能块。
已界说的子系统可以在//build/subsystem_config.json中找到。固然你也可以定制子系统。
这里建议先拷贝Hi3516DV300开辟板的配置文件,删撤除hisilicon_products这个子系统。这个子系统为Hi3516DV300 SOC编译内核,不恰当rk3568。
目次规划
参考 Board和SoC解耦的设计思路 ,并把芯片适配目次规划为:
- device
- ├── board --- 单板厂商目录
- │ └── hihope --- 单板厂商名字:
- │ └── rk3568 --- 单板名:rk3568,主要放置开发板相关的驱动业务代码
- └── soc --- SoC厂商目录
- └── rockchip --- SoC厂商名字:rockchip
- └── rk3568 --- SoC Series名:rk3568,主要为芯片原厂提供的一些方案,以及闭源库等
复制代码 <hr>- vendor
- └── hihope
- └── rk3568 --- 产品名字:产品、hcs以及demo相关
复制代码 内核启动
二级启动
二级启动简单来说就是将之前直接挂载sytem,从system下的init启动,改成先挂载ramdsik,从ramdsik中的init 启动,做些必要的初始化动作,如挂载system,vendor等分区,然后切到system下的init 。
Rk3568适配主要是将主线编译出来的ramdisk 打包到boot_linux.img中,主要有以下工作:
1.使能二级启动
在productdefine/common/device/rk3568.json 中使能enable_ramdisk。
- {
- "device_name": "rk3568",
- "device_company": "hihope",
- "target_os": "ohos",
- "target_cpu": "arm",
- "kernel_version": "",
- "device_build_path": "device/hihope/build",
- "enable_ramdisk": true,
- "build_selinux": true
- }
复制代码 2.把主线编译出来的ramdsik.img 打包到boot_linux.img
配置:
由于rk 启动uboot 支持从ramdisk 启动,只必要在打包boot_linux.img 的配置文件中增长ramdisk.img ,因此没有使用主线的its格式,具体配置就是在内核编译脚本make-ohos.sh 中增长:
- function make_extlinux_conf()
- {
- dtb_path=$1
- uart=$2
- image=$3
-
- echo "label rockchip-kernel-5.10" > ${EXTLINUX_CONF}
- echo " kernel /extlinux/${image}" >> ${EXTLINUX_CONF}
- echo " fdt /extlinux/${TOYBRICK_DTB}" >> ${EXTLINUX_CONF}
- if [ "enable_ramdisk" == "${ramdisk_flag}" ]; then
- echo " initrd /extlinux/ramdisk.img" >> ${EXTLINUX_CONF}
- fi
- cmdline="append earlycon=uart8250,mmio32,${uart} root=PARTUUID=614e0000-0000-4b53-8000-1d28000054a9 rw rootwait rootfstype=ext4"
- echo " ${cmdline}" >> ${EXTLINUX_CONF}
- }
复制代码 打包
增长了打包boot镜像的脚本make-boot.sh,供编译完ramdisk,打包boot 镜像时调用, 主要内容:
- genext2fs -B ${blocks} -b ${block_size} -d boot_linux -i 8192 -U boot_linux.img
复制代码 调用make-boot.sh 的修改可以参考如下pr:
https://gitee.com/openharmony/build/pulls/569/files
INIT配置
init相关配置请参考 启动子系统的规范要求即可
音频
RK3568 Audio总体结构图
ADM适配方案介绍
RK3568平台适配ADM框架图
主要完成Codec/DMA/I2S驱动注册,使得ADM可以加载驱动节点;并注册ADM与Drivers交互的接口函数
主要完成ADM Drivers adapter接口函数的实现,以及Codec_config.hcs/dai_config.hcs等配置信息的获取,并注册到对应的设备
ADM Drivers impl可以直接阅读硬件手册,完成驱动端到端的配置;也可以借用Linux原生驱动实现与接口,减少开辟者工作量。
目次结构
- ./device/board/hihope/rk3568/audio_drivers
- ├── codec
- │ └── rk809_codec
- │ ├── include
- │ │ ├── rk809_codec_impl.h
- │ │ └── rk817_codec.h
- │ └── src
- │ ├── rk809_codec_adapter.c
- │ ├── rk809_codec_linux_driver.c
- │ └── rk809_codec_ops.c
- ├── dai
- │ ├── include
- │ │ ├── rk3568_dai_linux.h
- │ │ └── rk3568_dai_ops.h
- │ └── src
- │ ├── rk3568_dai_adapter.c
- │ ├── rk3568_dai_linux_driver.c
- │ └── rk3568_dai_ops.c
- ├── dsp
- │ ├── include
- │ │ └── rk3568_dsp_ops.h
- │ └── src
- │ ├── rk3568_dsp_adapter.c
- │ └── rk3568_dsp_ops.c
- ├── include
- │ ├── audio_device_log.h
- │ └── rk3568_audio_common.h
- └── soc
- ├── include
- │ └── rk3568_dma_ops.h
- └── src
- ├── rk3568_dma_adapter.c
- └── rk3568_dma_ops.c
复制代码 RK3568适配ADM具体过程
梳理平台Audio框架
梳理目标平台的Audio结构,明确数据流与控制流通路。
- 针对RK3568平台,Audio的结构相对简单见RK3568 Audio总体结构图,Codec作为一个独立设备。I2C完成对设备的控制,I2S完成Codec设备与CPU之间的交互。
- 联合原理图整理I2S通道号,对应的引脚编号;I2C的通道号,地点等硬件信息。
- 获取Codec对应的datasheet,以及RK3568平台的Datasheet(包含I2S/DMA通道等寄存器的介绍)。
熟悉并了解ADM结构
ADM结构框图如下,Audio Peripheral Drivers和Platform Drivers为平台适配必要完成的工作。
联合第1步梳理出来的Audio结构分析,Audio Peripheral Drivers包含Rk809的驱动,Platform Drivers包含DMA驱动和I2S驱动。
必要适配的驱动 ADM对应模块 接口文件路径 RK809驱动 Accessory drivers/framework/include/audio/audio_accessory_if.h DMA驱动 platform drivers/framework/include/audio/audio_platform_if.h I2S驱动 DAI drivers/framework/include/audio/audio_dai_if.h.h 搭建驱动代码框架
配置HCS文件
在device_info.hcs文件中Audio下注册驱动节点
- audio :: host {
- hostName = "audio_host";
- priority = 60;
- device_dai0 :: device {
- device0 :: deviceNode {
- policy = 1;
- priority = 50;
- preload = 0;
- permission = 0666;
- moduleName = "DAI_RK3568";
- serviceName = "dai_service";
- deviceMatchAttr = "hdf_dai_driver";
- }
- }
- device_codec :: device {
- device0 :: deviceNode {
- policy = 1;
- priority = 50;
- preload = 0;
- permission = 0666;
- moduleName = "CODEC_RK809";
- serviceName = "codec_service_0";
- deviceMatchAttr = "hdf_codec_driver";
- }
- }
- device_codec_ex :: device {
- device0 :: deviceNode {
- policy = 1;
- priority = 50;
- preload = 0;
- permission = 0666;
- moduleName = "CODEC_RK817";
- serviceName = "codec_service_1";
- deviceMatchAttr = "hdf_codec_driver_ex";
- }
- }
- device_dsp :: device {
- device0 :: deviceNode {
- policy = 1;
- priority = 50;
- preload = 0;
- permission = 0666;
- moduleName = "DSP_RK3568";
- serviceName = "dsp_service_0";
- deviceMatchAttr = "hdf_dsp_driver";
- }
- }
- device_dma :: device {
- device0 :: deviceNode {
- policy = 1;
- priority = 50;
- preload = 0;
- permission = 0666;
- moduleName = "DMA_RK3568";
- serviceName = "dma_service_0";
- deviceMatchAttr = "hdf_dma_driver";
- }
- }
- ......
- }
- c
复制代码 根据接入的设备,选择Codec节点照旧Accessory节点,配置硬件设备对应的私有属性(包含寄存器首地点,相关control寄存器地点)涉及Codec_config.hcs和DAI_config.hcs
配置相关介绍见 Audio hcs配置章节以及ADM框架的audio_parse模块代码。
codec/accessory模块
1.将驱动注册到HDF框架中,代码片段如下,启动moduleName与HCS文件的中moduleName一致
- struct HdfDriverEntry g_codecDriverEntry = {
- .moduleVersion = 1,
- .moduleName = "CODEC_HI3516",
- .Bind = CodecDriverBind,
- .Init = CodecDriverInit,
- .Release = CodecDriverRelease,
- };
- HDF_INIT(g_codecDriverEntry);
复制代码 2.Codec模块必要添补:
g_codecData:codec设备的操纵函数集和私有数据集。
g_codecDaiDeviceOps:codecDai的操纵函数集,包罗启动传输和参数配置等函数接口。
g_codecDaiData:codec的数字音频接口的操纵函数集和私有数据集。
3.完成 bind、init和release函数的实现
4.验证
在bind和init函数加调试日志,编译版本并获取系统系统日志:
- [ 1.548624] [E/"rk809_codec_adapter"] [Rk809DriverBind][line:258]: enter
- [ 1.548635] [E/"rk809_codec_adapter"] [Rk809DriverBind][line:260]: success
- [ 1.548655] [E/"rk809_codec_adapter"] [Rk809DriverInit][line:270]: enter
- [ 1.549050] [E/"rk809_codec_adapter"] [GetServiceName][line:226]: enter
- [ 1.549061] [E/"rk809_codec_adapter"] [GetServiceName][line:250]: success
- [ 1.549072] [E/"rk809_codec_adapter"] [Rk809DriverInit][line:316]: g_chip->accessory.drvAccessoryName = codec_service_1
- [ 1.549085] [E/audio_core] [AudioSocRegisterDai][line:86]: Register [accessory_dai] success.
- [ 1.549096] [E/audio_core] [AudioRegisterAccessory][line:120]: Register [codec_service_1] success.
- [ 1.549107] [E/"rk809_codec_adapter"] [Rk809DriverInit][line:323]: success!
复制代码 DAI模块
1.将I2S驱动注册到HDF框架中,代码片段如下,启动moduleName与HCS文件的中moduleName一致
- struct HdfDriverEntry g_daiDriverEntry = {
- .moduleVersion = 1,
- .moduleName = "DAI_RK3568",
- .Bind = DaiDriverBind,
- .Init = DaiDriverInit,
- .Release = DaiDriverRelease,
- };
- HDF_INIT(g_daiDriverEntry);
复制代码 2.DAI模块添补:
- struct AudioDaiOps g_daiDeviceOps = {
- .Startup = Rk3568DaiStartup,
- .HwParams = Rk3568DaiHwParams,
- .Trigger = Rk3568NormalTrigger,
- };
- struct DaiData g_daiData = {
- .Read = Rk3568DeviceReadReg,
- .Write = Rk3568DeviceWriteReg,
- .DaiInit = Rk3568DaiDeviceInit,
- .ops = &g_daiDeviceOps,
- };
复制代码 3.完成 bind、init和release函数的实现
4.验证
在bind/init函数加调试日志,编译版本并获取系统系统日志
- [ 1.549193] [I/device_node] launch devnode dai_service
- [ 1.549204] [E/HDF_LOG_TAG] [DaiDriverBind][line:38]: entry!
- [ 1.549216] [E/HDF_LOG_TAG] [DaiDriverBind][line:55]: success!
- [ 1.549504] [E/audio_core] [AudioSocRegisterDai][line:86]: Register [dai_service] success.
- [ 1.549515] [E/HDF_LOG_TAG] [DaiDriverInit][line:116]: success.
复制代码 Platform模块
1.将DMA驱动注册到HDF框架中,代码片段如下,启动moduleName与HCS文件的中moduleName一致
- struct HdfDriverEntry g_platformDriverEntry = {
- .moduleVersion = 1,
- .moduleName = "DMA_RK3568",
- .Bind = PlatformDriverBind,
- .Init = PlatformDriverInit,
- .Release = PlatformDriverRelease,
- };
- HDF_INIT(g_platformDriverEntry);
复制代码 2.DMA模块必要添补:
- struct AudioDmaOps g_dmaDeviceOps = {
- .DmaBufAlloc = Rk3568DmaBufAlloc,
- .DmaBufFree = Rk3568DmaBufFree,
- .DmaRequestChannel = Rk3568DmaRequestChannel,
- .DmaConfigChannel = Rk3568DmaConfigChannel,
- .DmaPrep = Rk3568DmaPrep,
- .DmaSubmit = Rk3568DmaSubmit,
- .DmaPending = Rk3568DmaPending,
- .DmaPause = Rk3568DmaPause,
- .DmaResume = Rk3568DmaResume,
- .DmaPointer = Rk3568PcmPointer,
- };
- struct PlatformData g_platformData = {
- .PlatformInit = AudioDmaDeviceInit,
- .ops = &g_dmaDeviceOps,
- };
复制代码 3.完成 bind、init和release函数的实现
4.验证
在bind和init函数加调试日志,编译版本并获取系统系统日志
- [ 1.548469] [E/rk3568_platform_adapter] [PlatformDriverBind][line:42]: entry!
- [ 1.548481] [E/rk3568_platform_adapter] [PlatformDriverBind][line:58]: success!
- [ 1.548492] [E/rk3568_platform_adapter] [PlatformDriverInit][line:100]: entry.
- [ 1.548504] [E/rk3568_platform_adapter] [PlatformGetServiceName][line:67]: entry!
- [ 1.548515] [E/rk3568_platform_adapter] [PlatformGetServiceName][line:91]: success!
- [ 1.548528] [E/audio_core] [AudioSocRegisterPlatform][line:63]: Register [dma_service_0] success.
- [ 1.548536] [E/rk3568_platform_adapter] [PlatformDriverInit][line:119]: success.
复制代码 驱动适配
code/accessory模块
- 读取DTS文件,获取到对应设备节点,使用Linux原生的驱动注册函数,获取到对应device。
- static int rk817_platform_probe(struct platform_device *pdev) {
- rk817_pdev = pdev;
- dev_info(&pdev->dev, "got rk817-codec platform_device");
- return 0;
- }
- static struct platform_driver rk817_codec_driver = {
- .driver = {
- .name = "rk817-codec", // codec node in dts file
- .of_match_table = rk817_codec_dt_ids,
- },
- .probe = rk817_platform_probe,
- .remove
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