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提交 64b4d3ee 编写于 作者: B biga2021
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add usb docs 

Signed-off-by: Nbiga2021 <yanyin1@huawei.com>
Change-Id: I8d0f98365ec7b5b8d45a7092966ddd447f2eba67
上级 c7b678c4
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zh-cn/device-dev/driver/Readme-CN.md
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...@@ -33,4 +33,4 @@ ...@@ -33,4 +33,4 @@
- [TOUCHSCREEN](driver-peripherals-touch-des.md) - [TOUCHSCREEN](driver-peripherals-touch-des.md)
- [SENSOR](driver-peripherals-sensor-des.md) - [SENSOR](driver-peripherals-sensor-des.md)
- [WLAN](driver-peripherals-external-des.md) - [WLAN](driver-peripherals-external-des.md)
- [USB](driver-peripherals-usb-des.md)
zh-cn/device-dev/driver/driver-peripherals-usb-des.md 0 → 100755
浏览文件 @ 64b4d3ee
# USB<a name="ZH-CN_TOPIC_0000001052857350"></a>
- [概述](#section175431838101617)
- [接口说明](#section17667171301711)
- [开发指导](#section65745222184)
- [Host DDK API驱动开发步骤](#section865734181916)
- [Host RAW API驱动开发步骤](#section865734181916)
- [Device DDK API驱动开发步骤](#section865734181916)
- [开发实例](#section263714411191)
- [Host DDK API驱动开发](#section18249155619195)
- [Host RAW API驱动开发](#section3571192072014)
- [Device DDK API驱动开发](#section6356758162015)
## 概述<a name="section175431838101617"></a>
USB Host部分，主要包括协议封装、设备管理、驱动安装与卸载等。
USB Device部分，支持USB功能设备的开发，提供USB设备相关功能，主要包括设备管理、配置管理、IO管理，实现USB功能设备创建、配置、数据通信等。
USB Host驱动模型如下图1所示：
**图 1** USB Host驱动模型图<a name="fig10451455446"></a>
![](figure/USB-Host驱动模型图.png "USB Host驱动模型图")
**图 2** USB Device驱动模型图<a name="fig10451455446"></a>
![](figure/USB-Device驱动模型图.png "USB Device驱动模型图")
USB驱动模型对外开放的API接口能力如下：
- Usb Host DDK提供给用户态可直接调用的驱动能力接口，按照功能分类三大类：DDK初始化类、对interface对象操作类、对request对象操作类，可以提供DDK初始化、interface绑定和释放，打开和关闭操作，request的申请和释放，同步和异步传输等。
- Usb Deivce DDK提供设备管理、IO管理、配置管理，主要功能有：创建和删除设备、获取和打开接口、同步和异步传输等。
### 接口说明<a name="section17667171301711"></a>
USB驱动模型Host侧开放的API接口功能，参考表1。
**表 1** USB驱动模型Host侧开放的API接口功能介绍
<a name="table1513255710559"></a>
<table><thead align="left"><tr id="row171321857155517"><th class="cellrowborder" valign="top" width="10.721072107210723%" id="mcps1.2.4.1.1"><p id="p6132957115511"><a name="p6132957115511"></a><a name="p6132957115511"></a>头文件</p>
</th>
<th class="cellrowborder" valign="top" width="66.36663666366637%" id="mcps1.2.4.1.2"><p id="p14132125715552"><a name="p14132125715552"></a><a name="p14132125715552"></a>接口名称</p>
</th>
<th class="cellrowborder" valign="top" width="22.912291229122914%" id="mcps1.2.4.1.3"><p id="p18132205755516"><a name="p18132205755516"></a><a name="p18132205755516"></a>功能描述</p>
</th>
</tr>
</thead>
<tbody><tr id="row13132357165514"><td class="cellrowborder" rowspan="16" valign="top" width="10.721072107210723%" headers="mcps1.2.4.1.1 "><p id="p15132185775510"><a name="p15132185775510"></a><a name="p15132185775510"></a>usb_interface.h</p>
<p id="p18132157175510"><a name="p18132157175510"></a><a name="p18132157175510"></a></p>
<p id="p2133757135510"><a name="p2133757135510"></a><a name="p2133757135510"></a></p>
</td>
<td class="cellrowborder" valign="top" width="66.36663666366637%" headers="mcps1.2.4.1.2 "><p id="p1213365714550"><a name="p1213365714550"></a><a name="p1213365714550"></a>int32_t UsbInitHostSdk(struct UsbSession **session);</p>
</td>
<td class="cellrowborder" valign="top" width="22.912291229122914%" headers="mcps1.2.4.1.3 "><p id="p201331557185512"><a name="p201331557185512"></a><a name="p201331557185512"></a>USB主机端驱动开发工具包初始化</p>
</td>
</tr>
<tr id="row171331657185514"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p913305715553"><a name="p913305715553"></a><a name="p913305715553"></a>int32_t UsbExitHostSdk(const struct UsbSession *session);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p161332570553"><a name="p161332570553"></a><a name="p161332570553"></a>USB主机端驱动开发工具包退出</p>
</td>
</tr>
<tr id="row41331557165518"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p6133145713559"><a name="p6133145713559"></a><a name="p6133145713559"></a>const struct UsbInterface *UsbClaimInterface(const struct UsbSession *session, uint8_t busNum, uint8_t usbAddr, uint8_t interfaceIndex);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p131331557175510"><a name="p131331557175510"></a><a name="p131331557175510"></a>获取USB接口对象</p>
</td>
</tr>
<tr id="row77021769584"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p77031566584"><a name="p77031566584"></a><a name="p77031566584"></a>int UsbReleaseInterface(const struct UsbInterface *interfaceObj);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p1470315695811"><a name="p1470315695811"></a><a name="p1470315695811"></a>释放USB接口对象</p>
</td>
</tr>
<tr id="row71857914585"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p1318619155811"><a name="p1318619155811"></a><a name="p1318619155811"></a>int UsbAddOrRemoveInterface(const struct UsbSession *session, uint8_t busNum, uint8_t usbAddr, uint8_t interfaceIndex, UsbInterfaceStatus status);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p1186597589"><a name="p1186597589"></a><a name="p1186597589"></a>增加移除接口</p>
</td>
</tr>
<tr id="row18831119115815"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p48323975814"><a name="p48323975814"></a><a name="p48323975814"></a>UsbInterfaceHandle *UsbOpenInterface(const struct UsbInterface *interfaceObj);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p15832129135813"><a name="p15832129135813"></a><a name="p15832129135813"></a>打开USB对象接口</p>
</td>
</tr>
<tr id="row71857914585"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p1318619155811"><a name="p1318619155811"></a><a name="p1318619155811"></a>int32_t UsbCloseInterface(const UsbInterfaceHandle *interfaceHandle);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p1186597589"><a name="p1186597589"></a><a name="p1186597589"></a>关闭USB接口对象</p>
</td>
</tr>
<tr id="row18831119115815"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p48323975814"><a name="p48323975814"></a><a name="p48323975814"></a>int32_t UsbSelectInterfaceSetting(const UsbInterfaceHandle *interfaceHandle, uint8_t settingIndex, struct UsbInterface **interfaceObj);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p15832129135813"><a name="p15832129135813"></a><a name="p15832129135813"></a>设置可选配置</p>
</td>
</tr>
<tr id="row71857914585"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p1318619155811"><a name="p1318619155811"></a><a name="p1318619155811"></a>int32_t UsbGetPipeInfo(const UsbInterfaceHandle *interfaceHandle, uint8_t settingIndex, uint8_t pipeId, struct UsbPipeInfo *pipeInfo);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p1186597589"><a name="p1186597589"></a><a name="p1186597589"></a>获取指定可选设置的管道信息</p>
</td>
</tr>
<tr id="row18831119115815"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p48323975814"><a name="p48323975814"></a><a name="p48323975814"></a>int32_t UsbClearInterfaceHalt(const UsbInterfaceHandle *interfaceHandle, uint8_t pipeAddress);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p15832129135813"><a name="p15832129135813"></a><a name="p15832129135813"></a>清除指定索引的管道状态</p>
</td>
</tr>
<tr id="row71857914585"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p1318619155811"><a name="p1318619155811"></a><a name="p1318619155811"></a>struct UsbRequest *UsbAllocRequest(const UsbInterfaceHandle *interfaceHandle, int isoPackets, int length);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p1186597589"><a name="p1186597589"></a><a name="p1186597589"></a>分配请求对象</p>
</td>
</tr>
<tr id="row18831119115815"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p48323975814"><a name="p48323975814"></a><a name="p48323975814"></a>int UsbFreeRequest(const struct UsbRequest *request);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p15832129135813"><a name="p15832129135813"></a><a name="p15832129135813"></a>释放请求对象</p>
</td>
</tr>
<tr id="row71857914585"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p1318619155811"><a name="p1318619155811"></a><a name="p1318619155811"></a>int UsbSubmitRequestAsync(const struct UsbRequest *request);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p1186597589"><a name="p1186597589"></a><a name="p1186597589"></a>发送异步请求</p>
</td>
</tr>
<tr id="row18831119115815"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p48323975814"><a name="p48323975814"></a><a name="p48323975814"></a>int32_t UsbFillRequest(const struct UsbRequest *request, const UsbInterfaceHandle *interfaceHandle, const struct UsbRequestParams *params);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p15832129135813"><a name="p15832129135813"></a><a name="p15832129135813"></a>填充请求</p>
</td>
</tr>
<tr id="row71857914585"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p1318619155811"><a name="p1318619155811"></a><a name="p1318619155811"></a>sint UsbCancelRequest(const struct UsbRequest *request);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p1186597589"><a name="p1186597589"></a><a name="p1186597589"></a>取消异步请求</p>
</td>
</tr>
<tr id="row18831119115815"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p48323975814"><a name="p48323975814"></a><a name="p48323975814"></a>int UsbSubmitRequestSync(const struct UsbRequest *request);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p15832129135813"><a name="p15832129135813"></a><a name="p15832129135813"></a>发送同步请求</p>
</td>
</tr>
<tr id="row1513316577554"><td class="cellrowborder" rowspan="27" valign="top" width="10.721072107210723%" headers="mcps1.2.4.1.1 "><p id="p15133657185517"><a name="p15133657185517"></a><a name="p15133657185517"></a>usb_raw_api.h</p>
<p id="p1513315717555"><a name="p1513315717555"></a><a name="p1513315717555"></a></p>
<p id="p81331057125513"><a name="p81331057125513"></a><a name="p81331057125513"></a></p>
<p id="p18703206155812"><a name="p18703206155812"></a><a name="p18703206155812"></a></p>
<p id="p17186692581"><a name="p17186692581"></a><a name="p17186692581"></a></p>
<p id="p28322099581"><a name="p28322099581"></a><a name="p28322099581"></a></p>
</td>
<td class="cellrowborder" valign="top" width="66.36663666366637%" headers="mcps1.2.4.1.2 "><p id="p105259109581"><a name="p105259109581"></a><a name="p105259109581"></a>int UsbRawInit(struct UsbSession **session);</p>
</td>
<td class="cellrowborder" valign="top" width="22.912291229122914%" headers="mcps1.2.4.1.3 "><p id="p752531095814"><a name="p752531095814"></a><a name="p752531095814"></a>USB驱动开发工具包专家模式初始化</p>
</td>
</tr>
<tr id="row172902161193"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p16290141681918"><a name="p16290141681918"></a><a name="p16290141681918"></a>int UsbRawExit(const struct UsbSession *session);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p1929141611198"><a name="p1929141611198"></a><a name="p1929141611198"></a>USB驱动开发工具包专家模式退出</p>
</td>
</tr>
<tr id="row1948179195"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p1395181710193"><a name="p1395181710193"></a><a name="p1395181710193"></a>UsbRawHandle *UsbRawOpenDevice(const struct UsbSession *session, uint8_t busNum, uint8_t usbAddr);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p169531741912"><a name="p169531741912"></a><a name="p169531741912"></a>打开USB设备对象</p>
</td>
</tr>
<tr id="row1331121813197"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p533121871912"><a name="p533121871912"></a><a name="p533121871912"></a>int UsbRawCloseDevice(const UsbRawHandle *devHandle);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p4331131817195"><a name="p4331131817195"></a><a name="p4331131817195"></a>关闭USB设备对象</p>
</td>
</tr>
<tr id="row1393181951920"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p79410191191"><a name="p79410191191"></a><a name="p79410191191"></a>int UsbRawSendControlRequest(const struct UsbRawRequest *request, const UsbRawHandle *devHandle, const struct UsbControlRequestData *requestData);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p17948193197"><a name="p17948193197"></a><a name="p17948193197"></a>执行同步控制传输</p>
</td>
</tr>
<tr id="row12422102092613"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p194231720102610"><a name="p194231720102610"></a><a name="p194231720102610"></a>int UsbRawSendBulkRequest(const struct UsbRawRequest *request, const UsbRawHandle *devHandle, const struct UsbRequestData *requestData);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p342315202267"><a name="p342315202267"></a><a name="p342315202267"></a>执行同步批量传输</p>
</td>
</tr>
<tr id="row1393181951920"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p79410191191"><a name="p79410191191"></a><a name="p79410191191"></a>int UsbRawSendInterruptRequest(const struct UsbRawRequest *request, const UsbRawHandle *devHandle, const struct UsbRequestData *requestData);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p17948193197"><a name="p17948193197"></a><a name="p17948193197"></a>执行同步中断传输</p>
</td>
</tr>
<tr id="row12422102092613"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p194231720102610"><a name="p194231720102610"></a><a name="p194231720102610"></a>int UsbRawGetConfigDescriptor(const UsbRawDevice *rawDev, uint8_t configIndex, struct UsbRawConfigDescriptor **config);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p342315202267"><a name="p342315202267"></a><a name="p342315202267"></a>获取给定设备指定ID的设备配置描述符</p>
</td>
</tr>
<tr id="row1393181951920"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p79410191191"><a name="p79410191191"></a><a name="p79410191191"></a>void UsbRawFreeConfigDescriptor(const struct UsbRawConfigDescriptor *config);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p17948193197"><a name="p17948193197"></a><a name="p17948193197"></a>释放配置描述符内存空间</p>
</td>
</tr>
<tr id="row12422102092613"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p194231720102610"><a name="p194231720102610"></a><a name="p194231720102610"></a>int UsbRawGetConfiguration(const UsbRawHandle *devHandle, int *config);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p342315202267"><a name="p342315202267"></a><a name="p342315202267"></a>获取当前激活配置</p>
</td>
</tr>
<tr id="row1393181951920"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p79410191191"><a name="p79410191191"></a><a name="p79410191191"></a>int UsbRawSetConfiguration(const UsbRawHandle *devHandle, int config);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p17948193197"><a name="p17948193197"></a><a name="p17948193197"></a>设置当前激活配置</p>
</td>
</tr>
<tr id="row12422102092613"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p194231720102610"><a name="p194231720102610"></a><a name="p194231720102610"></a>int UsbRawGetDescriptor(const struct UsbRawRequest *request, const UsbRawHandle *devHandle, const struct UsbRawDescriptorParam *param, const unsigned char *data);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p342315202267"><a name="p342315202267"></a><a name="p342315202267"></a>获取描述符信息</p>
</td>
</tr>
<tr id="row1393181951920"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p79410191191"><a name="p79410191191"></a><a name="p79410191191"></a>UsbRawDevice *UsbRawGetDevice(const UsbRawHandle *devHandle);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p17948193197"><a name="p17948193197"></a><a name="p17948193197"></a>由设备句柄获取设备指针</p>
</td>
</tr>
<tr id="row12422102092613"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p194231720102610"><a name="p194231720102610"></a><a name="p194231720102610"></a>int UsbRawGetDeviceDescriptor(const UsbRawDevice *rawDev, struct UsbDeviceDescriptor *desc);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p342315202267"><a name="p342315202267"></a><a name="p342315202267"></a>获取给定设备的USB设备描述符</p>
</td>
</tr>
<tr id="row1393181951920"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p79410191191"><a name="p79410191191"></a><a name="p79410191191"></a>int UsbRawClaimInterface(const UsbRawHandle *devHandle, int interfaceNumber);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p17948193197"><a name="p17948193197"></a><a name="p17948193197"></a>声明给定设备句柄上的接口</p>
</td>
</tr>
<tr id="row12422102092613"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p194231720102610"><a name="p194231720102610"></a><a name="p194231720102610"></a>int UsbRawReleaseInterface(const UsbRawHandle *devHandle, int interfaceNumber);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p342315202267"><a name="p342315202267"></a><a name="p342315202267"></a>释放之前声明的接口</p>
</td>
</tr>
<tr id="row1393181951920"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p79410191191"><a name="p79410191191"></a><a name="p79410191191"></a>int UsbRawResetDevice(const UsbRawHandle *devHandle);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p17948193197"><a name="p17948193197"></a><a name="p17948193197"></a>复位设备</p>
</td>
</tr>
<tr id="row12422102092613"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p194231720102610"><a name="p194231720102610"></a><a name="p194231720102610"></a>struct UsbRawRequest *UsbRawAllocRequest(const UsbRawHandle *devHandle, int isoPackets, int length);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p342315202267"><a name="p342315202267"></a><a name="p342315202267"></a>分配一个带有指定数量的同步包描述符的传输请求</p>
</td>
</tr>
<tr id="row1393181951920"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p79410191191"><a name="p79410191191"></a><a name="p79410191191"></a>int UsbRawFreeRequest(const struct UsbRawRequest *request);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p17948193197"><a name="p17948193197"></a><a name="p17948193197"></a>释放之前分配的传输请求</p>
</td>
</tr>
<tr id="row12422102092613"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p194231720102610"><a name="p194231720102610"></a><a name="p194231720102610"></a>int UsbRawFillBulkRequest(const struct UsbRawRequest *request, const UsbRawHandle *devHandle, const struct UsbRawFillRequestData *fillData);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p342315202267"><a name="p342315202267"></a><a name="p342315202267"></a>填充批量传输请求所需信息</p>
</td>
</tr>
<tr id="row1393181951920"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p79410191191"><a name="p79410191191"></a><a name="p79410191191"></a>int UsbRawFillControlSetup(const unsigned char *setup, const struct UsbControlRequestData *requestData);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p17948193197"><a name="p17948193197"></a><a name="p17948193197"></a>填充控制传输设置包所需信息</p>
</td>
</tr>
<tr id="row12422102092613"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p194231720102610"><a name="p194231720102610"></a><a name="p194231720102610"></a>int UsbRawFillControlRequest(const struct UsbRawRequest *request, const UsbRawHandle *devHandle, const struct UsbRawFillRequestData *fillData);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p342315202267"><a name="p342315202267"></a><a name="p342315202267"></a>填充控制传输请求所需信息</p>
</td>
</tr>
<tr id="row1393181951920"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p79410191191"><a name="p79410191191"></a><a name="p79410191191"></a>int UsbRawFillInterruptRequest(const struct UsbRawRequest *request, const UsbRawHandle *devHandle, const struct UsbRawFillRequestData *fillData);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p17948193197"><a name="p17948193197"></a><a name="p17948193197"></a>填充中断传输请求所需信息</p>
</td>
</tr>
<tr id="row12422102092613"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p194231720102610"><a name="p194231720102610"></a><a name="p194231720102610"></a>int UsbRawFillIsoRequest(const struct UsbRawRequest *request, const UsbRawHandle *devHandle, const struct UsbRawFillRequestData *fillData);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p342315202267"><a name="p342315202267"></a><a name="p342315202267"></a>填充同步传输（Isochronous Transfers）请求所需信息</p>
</td>
</tr>
<tr id="row1393181951920"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p79410191191"><a name="p79410191191"></a><a name="p79410191191"></a>int UsbRawSubmitRequest(const struct UsbRawRequest *request);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p17948193197"><a name="p17948193197"></a><a name="p17948193197"></a>提交一个传输请求</p>
</td>
</tr>
<tr id="row12422102092613"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p194231720102610"><a name="p194231720102610"></a><a name="p194231720102610"></a>int UsbRawCancelRequest(const struct UsbRawRequest *request);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p342315202267"><a name="p342315202267"></a><a name="p342315202267"></a>取消一个传输请求</p>
</td>
</tr>
<tr id="row1393181951920"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p79410191191"><a name="p79410191191"></a><a name="p79410191191"></a>int UsbRawHandleRequests(const UsbRawHandle *devHandle);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p17948193197"><a name="p17948193197"></a><a name="p17948193197"></a>传输请求事件完成处理</p>
</td>
</tr>
</tbody>
</table>
USB驱动模型Device侧开放的API接口功能，参考表2。
**表 2** USB驱动模型Device侧开放的API接口功能介绍
<a name="table1513255710559"></a>
<table><thead align="left"><tr id="row171321857155517"><th class="cellrowborder" valign="top" width="10.721072107210723%" id="mcps1.2.4.1.1"><p id="p6132957115511"><a name="p6132957115511"></a><a name="p6132957115511"></a>头文件</p>
</th>
<th class="cellrowborder" valign="top" width="66.36663666366637%" id="mcps1.2.4.1.2"><p id="p14132125715552"><a name="p14132125715552"></a><a name="p14132125715552"></a>接口名称</p>
</th>
<th class="cellrowborder" valign="top" width="22.912291229122914%" id="mcps1.2.4.1.3"><p id="p18132205755516"><a name="p18132205755516"></a><a name="p18132205755516"></a>功能描述</p>
</th>
</tr>
</thead>
<tbody><tr id="row13132357165514"><td class="cellrowborder" rowspan="3" valign="top" width="10.721072107210723%" headers="mcps1.2.4.1.1 "><p id="p15132185775510"><a name="p15132185775510"></a><a name="p15132185775510"></a>usbfn_device.h</p>
<p id="p18132157175510"><a name="p18132157175510"></a><a name="p18132157175510"></a></p>
<p id="p2133757135510"><a name="p2133757135510"></a><a name="p2133757135510"></a></p>
</td>
<td class="cellrowborder" valign="top" width="66.36663666366637%" headers="mcps1.2.4.1.2 "><p id="p11132857135517"><a name="p11132857135517"></a><a name="p11132857135517"></a>const struct UsbFnDevice *UsbFnCreateDevice(const char *udcName, const struct UsbFnDescriptorData *descriptor);</p>
</td>
<td class="cellrowborder" valign="top" width="22.912291229122914%" headers="mcps1.2.4.1.3 "><p id="p213285715558"><a name="p213285715558"></a><a name="p213285715558"></a>创建Usb设备</p>
</td>
</tr>
<tr id="row9132135715515"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p16133957155517"><a name="p16133957155517"></a><a name="p16133957155517"></a>int UsbFnRemoveDevice(struct UsbFnDevice *fnDevice);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p113315745519"><a name="p113315745519"></a><a name="p113315745519"></a>删除Usb设备</p>
</td>
</tr>
<tr id="row171330575555"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p913315573557"><a name="p913315573557"></a><a name="p913315573557"></a>const struct UsbFnDevice *UsbFnGetDevice(const char *udcName);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p1413365765514"><a name="p1413365765514"></a><a name="p1413365765514"></a>获取Usb设备</p>
</td>
</tr>
<tr id="row1513316577554"><td class="cellrowborder" rowspan="6" valign="top" width="10.721072107210723%" headers="mcps1.2.4.1.1 "><p id="p15133657185517"><a name="p15133657185517"></a><a name="p15133657185517"></a>usbfn_interface.h</p>
<p id="p1513315717555"><a name="p1513315717555"></a><a name="p1513315717555"></a></p>
<p id="p81331057125513"><a name="p81331057125513"></a><a name="p81331057125513"></a></p>
<p id="p18703206155812"><a name="p18703206155812"></a><a name="p18703206155812"></a></p>
<p id="p17186692581"><a name="p17186692581"></a><a name="p17186692581"></a></p>
<p id="p28322099581"><a name="p28322099581"></a><a name="p28322099581"></a></p>
</td>
<td class="cellrowborder" valign="top" width="66.36663666366637%" headers="mcps1.2.4.1.2 "><p id="p1213365714550"><a name="p1213365714550"></a><a name="p1213365714550"></a>int UsbFnStartRecvInterfaceEvent(struct UsbFnInterface *interface, uint32_t eventMask, UsbFnEventCallback callback, void *context);</p>
</td>
<td class="cellrowborder" valign="top" width="22.912291229122914%" headers="mcps1.2.4.1.3 "><p id="p201331557185512"><a name="p201331557185512"></a><a name="p201331557185512"></a>开始接受Event事件</p>
</td>
</tr>
<tr id="row171331657185514"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p913305715553"><a name="p913305715553"></a><a name="p913305715553"></a>int UsbFnStopRecvInterfaceEvent(struct UsbFnInterface *interface);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p161332570553"><a name="p161332570553"></a><a name="p161332570553"></a>停止接受Event事件</p>
</td>
</tr>
<tr id="row41331557165518"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p6133145713559"><a name="p6133145713559"></a><a name="p6133145713559"></a>UsbFnInterfaceHandle UsbFnOpenInterface(struct UsbFnInterface *interface);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p131331557175510"><a name="p131331557175510"></a><a name="p131331557175510"></a>打开一个接口</p>
</td>
</tr>
<tr id="row77021769584"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p77031566584"><a name="p77031566584"></a><a name="p77031566584"></a>int UsbFnCloseInterface(UsbFnInterfaceHandle handle);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p1470315695811"><a name="p1470315695811"></a><a name="p1470315695811"></a>关闭一个接口</p>
</td>
</tr>
<tr id="row71857914585"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p1318619155811"><a name="p1318619155811"></a><a name="p1318619155811"></a>int UsbFnGetInterfacePipeInfo(struct UsbFnInterface *interface, uint8_t pipeId, struct UsbFnPipeInfo *info);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p1186597589"><a name="p1186597589"></a><a name="p1186597589"></a>获取管道信息</p>
</td>
</tr>
<tr id="row18831119115815"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p48323975814"><a name="p48323975814"></a><a name="p48323975814"></a>int UsbFnSetInterfaceProp(const struct UsbFnInterface *interface, const char *name, const char *value);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p15832129135813"><a name="p15832129135813"></a><a name="p15832129135813"></a>设置自定义属性</p>
</td>
</tr>
<tr id="row1452521025813"><td class="cellrowborder" rowspan="8" valign="top" width="10.721072107210723%" headers="mcps1.2.4.1.1 "><p id="p12525910165811"><a name="p12525910165811"></a><a name="p12525910165811"></a>usbfn_request.h</p>
<p id="p1929018168192"><a name="p1929018168192"></a><a name="p1929018168192"></a></p>
<p id="p99515179192"><a name="p99515179192"></a><a name="p99515179192"></a></p>
<p id="p11331918201913"><a name="p11331918201913"></a><a name="p11331918201913"></a></p>
<p id="p209341981918"><a name="p209341981918"></a><a name="p209341981918"></a></p>
<p id="p1996019191197"><a name="p1996019191197"></a><a name="p1996019191197"></a></p>
<p id="p2812720131919"><a name="p2812720131919"></a><a name="p2812720131919"></a></p>
<p id="p942322013262"><a name="p942322013262"></a><a name="p942322013262"></a></p>
</td>
<td class="cellrowborder" valign="top" width="66.36663666366637%" headers="mcps1.2.4.1.2 "><p id="p105259109581"><a name="p105259109581"></a><a name="p105259109581"></a>struct UsbFnRequest *UsbFnAllocCtrlRequest(UsbFnInterfaceHandle handle, uint32_t len);</p>
</td>
<td class="cellrowborder" valign="top" width="22.912291229122914%" headers="mcps1.2.4.1.3 "><p id="p752531095814"><a name="p752531095814"></a><a name="p752531095814"></a>申请一个控制请求</p>
</td>
</tr>
<tr id="row172902161193"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p16290141681918"><a name="p16290141681918"></a><a name="p16290141681918"></a>struct UsbFnRequest *UsbFnAllocRequest(UsbFnInterfaceHandle handle, uint8_t pipe, uint32_t len);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p1929141611198"><a name="p1929141611198"></a><a name="p1929141611198"></a>申请一个数据请求</p>
</td>
</tr>
<tr id="row1948179195"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p1395181710193"><a name="p1395181710193"></a><a name="p1395181710193"></a>int UsbFnFreeRequest(struct UsbFnRequest *req);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p169531741912"><a name="p169531741912"></a><a name="p169531741912"></a>释放一个请求</p>
</td>
</tr>
<tr id="row1331121813197"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p533121871912"><a name="p533121871912"></a><a name="p533121871912"></a>int UsbFnSubmitRequestAsync(struct UsbFnRequest *req);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p4331131817195"><a name="p4331131817195"></a><a name="p4331131817195"></a>发送异步请求</p>
</td>
</tr>
<tr id="row1393181951920"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p79410191191"><a name="p79410191191"></a><a name="p79410191191"></a>int UsbFnSubmitRequestSync(struct UsbFnRequest *req, uint32_t timeout);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p17948193197"><a name="p17948193197"></a><a name="p17948193197"></a>发送同步请求</p>
</td>
</tr>
<tr id="row12422102092613"><td class="cellrowborder" valign="top" headers="mcps1.2.4.1.1 "><p id="p194231720102610"><a name="p194231720102610"></a><a name="p194231720102610"></a>int UsbFnCancelRequest(struct UsbFnRequest *req);</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.2.4.1.2 "><p id="p342315202267"><a name="p342315202267"></a><a name="p342315202267"></a>取消请求</p>
</td>
</tr>
</tbody>
</table>
## 开发指导<a name="section65745222184"></a>
USB驱动是基于HDF框架、PLATFORM和OSAL基础接口进行开发，不区分操作系统和芯片平台，为不同USB器件提供统一的驱动模型。本篇开发指导以串口为例，分别介绍USB Host和USB Device驱动开发。
### 开发步骤<a name="section865734181916"></a>
### Host DDK API驱动开发步骤<a name="section18249155619195"></a>
1. 驱动匹配表配置。
2. 初始化Host DDK。
3. 待步骤2初始化完后获取UsbInterface接口对象。
4. 打开步骤3获取到的UsbInterface接口对象，获取对应接口的UsbInterfaceHandle对象。
5. 根据步骤4获取到的UsbInterfaceHandle对象，获取指定索引为pinpeIndex的pipeInfo信息。
6. 为步骤4获取到的UsbInterfaceHandle预先分配待发送的IO Request对象。
7. 根据输入参数params填充步骤6预先分配的IO Request。
8. 提交IO Request对象，可以选择同步或异步两种模式。
### Host RAW API驱动开发步骤<a name="section18249155619195"></a>
1. 驱动匹配表配置。
2. 初始化Host RAW，并打开USB设备，然后获取描述符，通过描述符获取接口、端点信息。
3. 分配Request，并根据传输类型使用如下接口对Request进行填充。
4. 提交IO Request对象，可以选择同步或异步两种模式。
### Device DDK API驱动开发步骤<a name="section18249155619195"></a>
1. 构造描述符。
2. 创建设备，使用步骤1构造的描述符实例化一个USB设备。
3. 根据创建的设备获取接口（UsbFnDeviceGetInterface），获取Pipe信息（UsbFnInterfaceGetPipeInfo），打开接口获取Handle（UsbFnInterfaceOpen），根据Handle和Pipe号获取Request（UsbFnRequestAlloc）。
4. 接收Event事件（UsbFnInterfaceStartRecvEvent）如Enable、Setup等事件，回调函数（UsbFnEventCallback）中对Event事件做出响应。
5. 收发数据，可以选择同步异步发送模式。
## 开发实例<a name="section263714411191"></a>
本实例提供USB串口驱动开发示例，并简要对具体关键点进行开发说明。
### Host DDK API驱动开发<a name="section18249155619195"></a>
```
root {
module = "usb_pnp_device";
usb_pnp_config {
match_attr = "usb_pnp_match";
usb_pnp_device_id = "UsbPnpDeviceId";
UsbPnpDeviceId {
idTableList = [
"host_acm_table"
];
host_acm_table {
//驱动模块名，该字段的值必须和驱动入口结构的moduleName一致
moduleName = "usbhost_acm";
//驱动对外发布服务的名称，必须唯一
serviceName = "usbhost_acm_pnp_service";
//驱动私有数据匹配关键字
deviceMatchAttr = "usbhost_acm_pnp_matchAttr";
//从该字段开始（包含该字段）之后数据长度，以byte为单位
length = 21;
//USB驱动匹配规则vendorId+productId+interfaceSubClass+interfaceProtocol+interfaceNumber
matchFlag = 0x0303;
//厂商编号
vendorId = 0x12D1;
//产品编号
productId = 0x5000;
//设备出厂编号，低16位
bcdDeviceLow = 0x0000;
//设备出厂编号，高16位
bcdDeviceHigh = 0x0000;
//USB分配的设备类代码
deviceClass = 0;
//USB分配的子类代码
deviceSubClass = 0;
//USB分配的设备协议代码
deviceProtocol = 0;
//接口类型，根据实际需要可填写多个
interfaceClass = [0];
//接口子类型，根据实际需要可填写多个
interfaceSubClass = [2, 0];
//接口所遵循的协议，根据实际需要可填写多个
interfaceProtocol = [1, 2];
//接口的编号，根据实际需要可填写多个
interfaceNumber = [2, 3];
}
}
}
}
#include "usb_serial.h"
#include "hdf_base.h"
#include "hdf_log.h"
#include "osal_mem.h"
#include "osal_time.h"
#include "securec.h"
#include "usb_interface.h"
#include "hdf_usb_pnp_manage.h"
#define HDF_LOG_TAG USB_HOST_ACM
#define STR_LEN 512
static struct UsbRequest *g_syncRequest = NULL;
static struct UsbRequest *g_ctrlCmdRequest = NULL;
static bool g_acmReleaseFlag = false;
static uint8_t *g_acmReadBuffer = NULL;
...
static int SerialCtrlMsg(struct AcmDevice *acm, uint8_t request,
uint16_t value, void *buf, uint16_t len)
{
int ret;
uint16_t index = acm->intPipe->interfaceId;
struct UsbControlParams controlParams = {};
struct UsbRequestParams parmas = {};
if (acm == NULL || buf == NULL) {
HDF_LOGE("%{public}s:invalid param", __func__);
return HDF_ERR_IO;
}
if (acm->ctrlReq == NULL) {
acm->ctrlReq = UsbAllocRequest(acm->ctrDevHandle, 0, len);
if (acm->ctrlReq == NULL) {
HDF_LOGE("%{public}s: UsbAllocRequest faild", __func__);
return HDF_ERR_IO;
}
}
controlParams.request = request;
controlParams.target = USB_REQUEST_TARGET_INTERFACE;
controlParams.reqType = USB_REQUEST_TYPE_CLASS;
controlParams.directon = USB_REQUEST_DIR_TO_DEVICE;
controlParams.value = value;
controlParams.index = index;
controlParams.data = buf;
controlParams.size = len;
parmas.interfaceId = USB_CTRL_INTERFACE_ID;
parmas.pipeAddress = acm->ctrPipe->pipeAddress;
parmas.pipeId = acm->ctrPipe->pipeId;
parmas.requestType = USB_REQUEST_PARAMS_CTRL_TYPE;
parmas.timeout = USB_CTRL_SET_TIMEOUT;
parmas.ctrlReq = UsbControlSetUp(&controlParams);
ret = UsbFillRequest(acm->ctrlReq, acm->ctrDevHandle, &parmas);
if (HDF_SUCCESS != ret) {
HDF_LOGE("%{public}s: faile, ret=%{public}d ", __func__, ret);
return ret;
}
ret = UsbSubmitRequestSync(acm->ctrlReq); //发送同步IO Request
if (HDF_SUCCESS != ret) {
HDF_LOGE("UsbSubmitRequestSync faile, ret=%{public}d ", ret);
return ret;
}
if (!acm->ctrlReq->compInfo.status) {
HDF_LOGE("%{public}s status=%{public}d ", __func__, acm->ctrlReq->compInfo.status);
}
return HDF_SUCCESS;
}
...
static struct UsbInterface *GetUsbInterfaceById(const struct AcmDevice *acm,
uint8_t interfaceIndex)
{
struct UsbInterface *tmpIf = NULL;
tmpIf = (struct UsbInterface *)UsbClaimInterface(acm->session, acm->busNum, \
acm->devAddr, interfaceIndex); //获取UsbInterface接口对象
return tmpIf;
}
...
static struct UsbPipeInfo *EnumePipe(const struct AcmDevice *acm,
uint8_t interfaceIndex, UsbPipeType pipeType, UsbPipeDirection pipeDirection)
{
uint8_t i;
int ret;
struct UsbInterfaceInfo *info = NULL;
UsbInterfaceHandle *interfaceHandle = NULL;
if (pipeType == USB_PIPE_TYPE_CONTROL)
{
info = &acm->ctrIface->info;
interfaceHandle = acm->ctrDevHandle;
}
else
{
info = &acm->iface[interfaceIndex]->info;
interfaceHandle = InterfaceIdToHandle(acm, info->interfaceIndex);
}
for (i = 0; i <= info->pipeNum; i++) {
struct UsbPipeInfo p;
ret = UsbGetPipeInfo(interfaceHandle, info->curAltSetting, i, &p);//获取指定索引为i的pipeInfo信息
if (ret < 0) {
continue;
}
if ((p.pipeDirection == pipeDirection) && (p.pipeType == pipeType)) {
struct UsbPipeInfo *pi = OsalMemCalloc(sizeof(*pi));
if (pi == NULL) {
HDF_LOGE("%{public}s: Alloc pipe failed", __func__);
return NULL;
}
p.interfaceId = info->interfaceIndex;
*pi = p;
return pi;
}
}
return NULL;
}
static struct UsbPipeInfo *GetPipe(const struct AcmDevice *acm,
UsbPipeType pipeType, UsbPipeDirection pipeDirection)
{
uint8_t i;
if (acm == NULL) {
HDF_LOGE("%{public}s: invalid parmas", __func__);
return NULL;
}
for (i = 0; i < acm->interfaceCnt; i++) {
struct UsbPipeInfo *p = NULL;
if (!acm->iface[i]) {
continue;
}
p = EnumePipe(acm, i, pipeType, pipeDirection);
if (p == NULL) {
continue;
}
return p;
}
return NULL;
}
/* HdfDriverEntry implementations */
static int32_t UsbSerialDriverBind(struct HdfDeviceObject *device)
{
struct UsbPnpNotifyServiceInfo *info = NULL;
errno_t err;
struct AcmDevice *acm = NULL;
if (device == NULL) {
HDF_LOGE("%s: device is null", __func__);
return HDF_ERR_INVALID_OBJECT;
}
acm = (struct AcmDevice *)OsalMemCalloc(sizeof(*acm));
if (acm == NULL) {
HDF_LOGE("%s: Alloc usb serial device failed", __func__);
return HDF_FAILURE;
}
if (OsalMutexInit(&acm->lock) != HDF_SUCCESS) {
HDF_LOGE("%s:%d OsalMutexInit fail", __func__, __LINE__);
goto error;
}
info = (struct UsbPnpNotifyServiceInfo *)device->priv;
if (info != NULL) {
HDF_LOGD("%s:%d busNum=%d,devAddr=%d,interfaceLength=%d", \
__func__, __LINE__, info->busNum, info->devNum, info->interfaceLength);
acm->busNum = info->busNum;
acm->devAddr = info->devNum;
acm->interfaceCnt = info->interfaceLength;
err = memcpy_s((void *)(acm->interfaceIndex), USB_MAX_INTERFACES,
(const void*)info->interfaceNumber, info->interfaceLength);
if (err != EOK) {
HDF_LOGE("%s:%d memcpy_s faile err=%d", \
__func__, __LINE__, err);
goto lock_error;
}
} else {
HDF_LOGE("%s:%d info is NULL!", __func__, __LINE__);
goto lock_error;
}
acm->device = device;
device->service = &(acm->service);
acm->device->service->Dispatch = UsbSerialDeviceDispatch;
HDF_LOGD("UsbSerialDriverBind=========================OK");
return HDF_SUCCESS;
lock_error:
if (OsalMutexDestroy(&acm->lock)) {
HDF_LOGE("%s:%d OsalMutexDestroy fail", __func__, __LINE__);
}
error:
OsalMemFree(acm);
acm = NULL;
return HDF_FAILURE;
}
...
static int AcmAllocReadRequests(struct AcmDevice *acm)
{
int ret;
struct UsbRequestParams readParmas = {};
for (int i = 0; i < ACM_NR; i++) {
acm->readReq[i] = UsbAllocRequest(InterfaceIdToHandle(acm, acm->dataInPipe->interfaceId), 0, acm->readSize); //分配待发送的readReq IO Request对象
if (!acm->readReq[i]) {
HDF_LOGE("readReq request faild\n");
goto error;
}
readParmas.userData = (void *)acm;
readParmas.pipeAddress = acm->dataInPipe->pipeAddress;
readParmas.pipeId = acm->dataInPipe->pipeId;
readParmas.interfaceId = acm->dataInPipe->interfaceId;
readParmas.callback = AcmReadBulk;
readParmas.requestType = USB_REQUEST_PARAMS_DATA_TYPE;
readParmas.timeout = USB_CTRL_SET_TIMEOUT;
readParmas.dataReq.numIsoPackets = 0;
readParmas.dataReq.directon = (acm->dataInPipe->pipeDirection >> USB_PIPE_DIR_OFFSET) & 0x1;
readParmas.dataReq.length = acm->readSize;
ret = UsbFillRequest(acm->readReq[i], InterfaceIdToHandle(acm, acm->dataInPipe->interfaceId), &readParmas); //填充待发送的readReq对象
if (HDF_SUCCESS != ret) {
HDF_LOGE("%{public}s: UsbFillRequest faile, ret=%{public}d \n", __func__, ret);
goto error;
}
}
return HDF_SUCCESS;
error:
AcmFreeReadRequests(acm);
return HDF_ERR_MALLOC_FAIL;
}
static int AcmAllocNotifyRequest(struct AcmDevice *acm)
{
int ret;
struct UsbRequestParams intParmas = {};
acm->notifyReq = UsbAllocRequest(InterfaceIdToHandle(acm, acm->intPipe->interfaceId), 0, acm->intSize); //分配待发送的中断IO Request对象
if (!acm->notifyReq) {
HDF_LOGE("notifyReq request fail\n");
return HDF_ERR_MALLOC_FAIL;
}
intParmas.userData = (void *)acm;
intParmas.pipeAddress = acm->intPipe->pipeAddress;
intParmas.pipeId = acm->intPipe->pipeId;
intParmas.interfaceId = acm->intPipe->interfaceId;
intParmas.callback = AcmCtrlIrq;
intParmas.requestType = USB_REQUEST_PARAMS_DATA_TYPE;
intParmas.timeout = USB_CTRL_SET_TIMEOUT;
intParmas.dataReq.numIsoPackets = 0;
intParmas.dataReq.directon = (acm->intPipe->pipeDirection >> USB_PIPE_DIR_OFFSET) & DIRECTION_MASK;
intParmas.dataReq.length = acm->intSize;
ret = UsbFillRequest(acm->notifyReq, InterfaceIdToHandle(acm, acm->intPipe->interfaceId), &intParmas); //填充预先分配的中断IO Request
if (HDF_SUCCESS != ret) {
HDF_LOGE("%{public}s: UsbFillRequest faile, ret=%{public}d \n", __func__, ret);
goto error;
}
return HDF_SUCCESS;
error:
AcmFreeNotifyReqeust(acm);
return ret;
}
static void AcmReleaseInterfaces(struct AcmDevice *acm)
{
for (int i = 0; i < acm->interfaceCnt; i++) {
if (acm->iface[i]) {
UsbReleaseInterface(acm->iface[i]);
acm->iface[i] = NULL;
}
}
if (acm->ctrIface) {
UsbReleaseInterface(acm->ctrIface);
acm->ctrIface = NULL;
}
}
static int32_t AcmClaimInterfaces(struct AcmDevice *acm)
{
for (int i = 0; i < acm->interfaceCnt; i++) {
acm->iface[i] = GetUsbInterfaceById((const struct AcmDevice *)acm, acm->interfaceIndex[i]); //获取UsbInterface接口对象
if (acm->iface[i] == NULL) {
HDF_LOGE("%{public}s: interface%{public}d is null", __func__, acm->interfaceIndex[i]);
goto error;
}
}
acm->ctrIface = GetUsbInterfaceById((const struct AcmDevice *)acm, USB_CTRL_INTERFACE_ID); //获取控制接口对应的UsbInterface接口对象
if (acm->ctrIface == NULL) {
HDF_LOGE("%{public}s: GetUsbInterfaceById null", __func__);
goto error;
}
return HDF_SUCCESS;
error:
AcmReleaseInterfaces(acm);
return HDF_FAILURE;
}
static void AcmCloseInterfaces(struct AcmDevice *acm)
{
for (int i = 0; i < acm->interfaceCnt; i++) {
if (acm->devHandle[i]) {
UsbCloseInterface(acm->devHandle[i]);
acm->devHandle[i] = NULL;
}
}
if (acm->ctrDevHandle) {
UsbCloseInterface(acm->ctrDevHandle);
acm->ctrDevHandle = NULL;
}
}
static int32_t AcmOpenInterfaces(struct AcmDevice *acm)
{
for (int i = 0; i < acm->interfaceCnt; i++) {
if (acm->iface[i]) {
acm->devHandle[i] = UsbOpenInterface(acm->iface[i]); //打开获取到的UsbInterface接口对象
if (acm->devHandle[i] == NULL) {
HDF_LOGE("%{public}s: UsbOpenInterface null", __func__);
goto error;
}
}
}
acm->ctrDevHandle = UsbOpenInterface(acm->ctrIface);
if (acm->ctrDevHandle == NULL) {
HDF_LOGE("%{public}s: ctrDevHandle UsbOpenInterface null", __func__);
goto error;
}
return HDF_SUCCESS;
error:
AcmCloseInterfaces(acm);
return HDF_FAILURE;
}
static int32_t AcmGetPipes(struct AcmDevice *acm)
{
acm->dataInPipe = GetPipe(acm, USB_PIPE_TYPE_BULK, USB_PIPE_DIRECTION_IN);//获取dataInPipe的pipeInfo信息
if (acm->dataInPipe == NULL) {
HDF_LOGE("dataInPipe is NULL");
goto error;
}
acm->dataOutPipe = GetPipe(acm, USB_PIPE_TYPE_BULK, USB_PIPE_DIRECTION_OUT);//获取dataOutPipe的pipeInfo信息
if (acm->dataOutPipe == NULL) {
HDF_LOGE("dataOutPipe is NULL");
goto error;
}
acm->ctrPipe = EnumePipe(acm, acm->ctrIface->info.interfaceIndex, USB_PIPE_TYPE_CONTROL, USB_PIPE_DIRECTION_OUT); //获取控制pipe的pipeInfo信息
if (acm->ctrPipe == NULL) {
HDF_LOGE("ctrPipe is NULL");
goto error;
}
acm->intPipe = GetPipe(acm, USB_PIPE_TYPE_INTERRUPT, USB_PIPE_DIRECTION_IN);//获取中断pipe的pipeInfo信息
if (acm->intPipe == NULL) {
HDF_LOGE("intPipe is NULL");
goto error;
}
acm->readSize = acm->dataInPipe->maxPacketSize;
acm->writeSize = acm->dataOutPipe->maxPacketSize;
acm->ctrlSize = acm->ctrPipe->maxPacketSize;
acm->intSize = acm->intPipe->maxPacketSize;
return HDF_SUCCESS;
error:
AcmFreePipes(acm);
return HDF_FAILURE;
}
static void AcmFreeRequests(struct AcmDevice *acm)
{
if (g_syncRequest != NULL) {
UsbFreeRequest(g_syncRequest);
g_syncRequest = NULL;
}
AcmFreeReadRequests(acm);
AcmFreeNotifyReqeust(acm);
AcmFreeWriteRequests(acm);
AcmWriteBufFree(acm);
}
static int32_t AcmAllocRequests(struct AcmDevice *acm)
{
int32_t ret;
if (AcmWriteBufAlloc(acm) < 0) {
HDF_LOGE("%{public}s: AcmWriteBufAlloc failed", __func__);
return HDF_ERR_MALLOC_FAIL;
}
for (int i = 0; i < ACM_NW; i++) {
struct AcmWb *snd = &(acm->wb[i]);
snd->request = UsbAllocRequest(InterfaceIdToHandle(acm, acm->dataOutPipe->interfaceId), 0, acm->writeSize); //分配待发送的IO Request对象
snd->instance = acm;
if (snd->request == NULL) {
HDF_LOGE("%{public}s:%{public}d snd request fail", __func__, __LINE__);
goto error_alloc_write_req;
}
}
ret = AcmAllocNotifyRequest(acm); //分配并填充中断IO Request对象
if (ret != HDF_SUCCESS) {
HDF_LOGE("%{public}s:%{public}d AcmAllocNotifyRequest fail", __func__, __LINE__);
goto error_alloc_int_req;
}
ret = AcmAllocReadRequests(acm); //分配并填充readReq IO Request对象
if (ret) {
HDF_LOGE("%{public}s:%{public}d AcmAllocReadRequests fail", __func__, __LINE__);
goto error_alloc_read_req;
}
return HDF_SUCCESS;
error_alloc_read_req:
AcmFreeNotifyReqeust(acm);
error_alloc_int_req:
AcmFreeWriteRequests(acm);
error_alloc_write_req:
AcmWriteBufFree(acm);
return HDF_FAILURE;
}
static int32_t AcmInit(struct AcmDevice *acm)
{
int32_t ret;
struct UsbSession *session = NULL;
if (acm->initFlag == true) {
HDF_LOGE("%{public}s:%{public}d: initFlag is true", __func__, __LINE__);
return HDF_SUCCESS;
}
ret = UsbInitHostSdk(NULL); //初始化Host DDK
if (ret != HDF_SUCCESS) {
HDF_LOGE("%{public}s: UsbInitHostSdk faild", __func__);
return HDF_ERR_IO;
}
acm->session = session;
ret = AcmClaimInterfaces(acm);
if (ret != HDF_SUCCESS) {
HDF_LOGE("%{public}s: AcmClaimInterfaces faild", __func__);
goto error_claim_interfaces;
}
ret = AcmOpenInterfaces(acm);
if (ret != HDF_SUCCESS) {
HDF_LOGE("%{public}s: AcmOpenInterfaces faild", __func__);
goto error_open_interfaces;
}
ret = AcmGetPipes(acm);
if (ret != HDF_SUCCESS) {
HDF_LOGE("%{public}s: AcmGetPipes failed", __func__);
goto error_get_pipes;
}
ret = AcmAllocRequests(acm);
if (ret != HDF_SUCCESS) {
HDF_LOGE("%{public}s: AcmAllocRequests failed", __func__);
goto error_alloc_reqs;
}
acm->lineCoding.dwDTERate = CpuToLe32(DATARATE);
acm->lineCoding.bCharFormat = CHARFORMAT;
acm->lineCoding.bParityType = USB_CDC_NO_PARITY;
acm->lineCoding.bDataBits = USB_CDC_1_STOP_BITS;
acm->initFlag = true;
HDF_LOGD("%{public}s:%{public}d========OK", __func__, __LINE__);
return HDF_SUCCESS;
error_alloc_reqs:
AcmFreePipes(acm);
error_get_pipes:
AcmCloseInterfaces(acm);
error_open_interfaces:
AcmReleaseInterfaces(acm);
error_claim_interfaces:
UsbExitHostSdk(acm->session);
acm->session = NULL;
return ret;
}
static void AcmRelease(struct AcmDevice *acm)
{
if (acm->initFlag == false) {
HDF_LOGE("%{public}s:%{public}d: initFlag is false", __func__, __LINE__);
return;
}
AcmFreeRequests(acm);
AcmFreePipes(acm);
AcmCloseInterfaces(acm);
AcmReleaseInterfaces(acm);
UsbExitHostSdk(acm->session);
acm->session = NULL;
acm->initFlag = false;
}
static int32_t UsbSerialDriverInit(struct HdfDeviceObject *device)
{
int32_t ret;
struct AcmDevice *acm = NULL;
if (device == NULL) {
HDF_LOGE("%{public}s: device is null", __func__);
return HDF_ERR_INVALID_OBJECT;
}
acm = (struct AcmDevice *)device->service;
OsalMutexInit(&acm->readLock);
OsalMutexInit(&acm->writeLock);
HDF_LOGD("%{public}s:%{public}d busNum=%{public}d,devAddr=%{public}d", \
__func__, __LINE__, acm->busNum, acm->devAddr);
ret = UsbSerialDeviceAlloc(acm);
if (ret != HDF_SUCCESS) {
HDF_LOGE("%{public}s: Serial Device alloc faild", __func__);
}
acm->initFlag = false;
g_acmReleaseFlag = false;
HDF_LOGD("%{public}s:%{public}d init ok!", __func__, __LINE__);
return ret;
}
static void UsbSerialDriverRelease(struct HdfDeviceObject *device)
{
struct AcmDevice *acm = NULL;
if (device == NULL) {
HDF_LOGE("%{public}s: device is NULL", __func__);
return;
}
acm = (struct AcmDevice *)device->service;
if (acm == NULL) {
HDF_LOGE("%{public}s: acm is null", __func__);
return;
}
g_acmReleaseFlag = true;
if (acm->initFlag == true) {
HDF_LOGE("%{public}s:%{public}d AcmRelease", __func__, __LINE__);
AcmRelease(acm);
}
UsbSeriaDevicelFree(acm);
OsalMutexDestroy(&acm->writeLock);
OsalMutexDestroy(&acm->readLock);
OsalMutexDestroy(&acm->lock);
OsalMemFree(acm);
acm = NULL;
HDF_LOGD("%{public}s:%{public}d exit", __func__, __LINE__);
}
struct HdfDriverEntry g_usbSerialDriverEntry = {
.moduleVersion = 1,
.moduleName = "usbhost_acm", //驱动模块名称，必须与hcs文件中配置的名称一致
.Bind = UsbSerialDriverBind,
.Init = UsbSerialDriverInit,
.Release = UsbSerialDriverRelease,
};
HDF_INIT(g_usbSerialDriverEntry);
```
### Host RAW API驱动开发<a name="section3571192072014"></a>
```
root {
module = "usb_pnp_device";
usb_pnp_config {
match_attr = "usb_pnp_match";
usb_pnp_device_id = "UsbPnpDeviceId";
UsbPnpDeviceId {
idTableList = [
"host_acm_rawapi_table"
];
host_acm_rawapi_table { //驱动配置匹配表信息
//驱动模块名，该字段的值必须和驱动入口结构的moduleName一致
moduleName = "usbhost_acm_rawapi";
//驱动对外发布服务的名称，必须唯一
serviceName = "usbhost_acm_rawapi_service";
//驱动私有数据匹配关键字
deviceMatchAttr = "usbhost_acm_rawapi_matchAttr";
//从该字段开始（包含该字段）之后数据长度，以byte为单位
length = 21;
//USB驱动匹配规则vendorId+productId+interfaceSubClass+interfaceProtocol+interfaceNumber
matchFlag = 0x0303;
//厂商编号
vendorId = 0x12D1;
//产品编号
productId = 0x5000;
//设备出厂编号，低16位
bcdDeviceLow = 0x0000;
//设备出厂编号，高16位
bcdDeviceHigh = 0x0000;
//USB分配的设备类代码
deviceClass = 0;
//USB分配的子类代码
deviceSubClass = 0;
//USB分配的设备协议代码
deviceProtocol = 0;
//接口类型，根据实际需要可填写多个
interfaceClass = [0];
//接口子类型，根据实际需要可填写多个
interfaceSubClass = [2, 0];
//接口所遵循的协议，根据实际需要可填写多个
interfaceProtocol = [1, 2];
//接口的编号，根据实际需要可填写多个
interfaceNumber = [2, 3];
}
}
}
}
#include "usb_serial_rawapi.h"
#include <unistd.h>
#include "osal_mem.h"
#include "osal_time.h"
#include "securec.h"
#include "hdf_base.h"
#include "hdf_log.h"
#include "hdf_usb_pnp_manage.h"
#define HDF_LOG_TAG USB_HOST_ACM_RAW_API
#define USB_CTRL_REQ_SIZE 64
#define USB_IO_THREAD_STACK_SIZE 8192
#define USB_RAW_IO_SLEEP_MS_TIME 100
#define USB_RAW_IO_STOP_WAIT_MAX_TIME 3
static struct UsbRawRequest *g_syncRequest = NULL;
static UsbRawIoProcessStatusType g_stopIoStatus = USB_RAW_IO_PROCESS_RUNNING;
struct OsalMutex g_stopIoLock;
static bool g_rawAcmReleaseFlag = false;
......
static int UsbGetConfigDescriptor(UsbRawHandle *devHandle, struct UsbRawConfigDescriptor **config)
{
UsbRawDevice *dev = NULL;
int activeConfig;
int ret;
if (devHandle == NULL) {
HDF_LOGE("%{public}s:%{public}d devHandle is NULL",
__func__, __LINE__);
return HDF_ERR_INVALID_PARAM;
}
ret = UsbRawGetConfiguration(devHandle, &activeConfig);
if (ret) {
HDF_LOGE("%{public}s:%{public}d UsbRawGetConfiguration failed, ret=%{public}d",
__func__, __LINE__, ret);
return HDF_FAILURE;
}
HDF_LOGE("%{public}s:%{public}d activeConfig=%{public}d", __func__, __LINE__, activeConfig);
dev = UsbRawGetDevice(devHandle);
if (dev == NULL) {
HDF_LOGE("%{public}s:%{public}d UsbRawGetDevice failed",
__func__, __LINE__);
return HDF_FAILURE;
}
ret = UsbRawGetConfigDescriptor(dev, activeConfig, config);
if (ret) {
HDF_LOGE("UsbRawGetConfigDescriptor failed, ret=%{public}d\n", ret);
return HDF_FAILURE;
}
return HDF_SUCCESS;
}
...
static int UsbAllocWriteRequests(struct AcmDevice *acm)
{
int i;
for (i = 0; i < ACM_NW; i++) {
struct AcmWb *snd = &acm->wb[i];
snd->request = UsbRawAllocRequest(acm->devHandle, 0, acm->dataOutEp->maxPacketSize);
snd->instance = acm;
if (snd->request == NULL) {
HDF_LOGE("%{public}s: UsbRawAllocRequest faild", __func__);
return HDF_ERR_MALLOC_FAIL;
}
}
return HDF_SUCCESS;
}
...
/* HdfDriverEntry implementations */
static int32_t UsbSerialDriverBind(struct HdfDeviceObject *device)
{
struct AcmDevice *acm = NULL;
struct UsbPnpNotifyServiceInfo *info = NULL;
errno_t err;
if (device == NULL) {
HDF_LOGE("%s: device is null", __func__);
return HDF_ERR_INVALID_OBJECT;
}
acm = (struct AcmDevice *)OsalMemCalloc(sizeof(*acm));
if (acm == NULL) {
HDF_LOGE("%s: Alloc usb serial device failed", __func__);
return HDF_FAILURE;
}
if (OsalMutexInit(&acm->lock) != HDF_SUCCESS) {
HDF_LOGE("%s:%d OsalMutexInit fail", __func__, __LINE__);
goto error;
}
info = (struct UsbPnpNotifyServiceInfo *)device->priv;
if (info != NULL) {
acm->busNum = info->busNum;
acm->devAddr = info->devNum;
acm->interfaceCnt = info->interfaceLength;
err = memcpy_s((void *)(acm->interfaceIndex), USB_MAX_INTERFACES,
(const void*)info->interfaceNumber, info->interfaceLength);
if (err != EOK) {
HDF_LOGE("%s:%d memcpy_s faile err=%d", \
__func__, __LINE__, err);
goto lock_error;
}
} else {
HDF_LOGE("%s:%d info is NULL!", __func__, __LINE__);
goto lock_error;
}
device->service = &(acm->service);
device->service->Dispatch = UsbSerialDeviceDispatch;
acm->device = device;
HDF_LOGD("UsbSerialDriverBind=========================OK");
return HDF_SUCCESS;
lock_error:
if (OsalMutexDestroy(&acm->lock)) {
HDF_LOGE("%s:%d OsalMutexDestroy fail", __func__, __LINE__);
}
error:
OsalMemFree(acm);
acm = NULL;
return HDF_FAILURE;
}
...
static int UsbAllocReadRequests(struct AcmDevice *acm)
{
struct UsbRawFillRequestData reqData;
int size = acm->dataInEp->maxPacketSize;
int ret;
for (int i = 0; i < ACM_NR; i++) {
acm->readReq[i] = UsbRawAllocRequest(acm->devHandle, 0, size);
if (!acm->readReq[i]) {
HDF_LOGE("readReq request faild\n");
return HDF_ERR_MALLOC_FAIL;
}
reqData.endPoint = acm->dataInEp->addr;
reqData.numIsoPackets = 0;
reqData.callback = AcmReadBulkCallback;
reqData.userData = (void *)acm;
reqData.timeout = USB_CTRL_SET_TIMEOUT;
reqData.length = size;
ret = UsbRawFillBulkRequest(acm->readReq[i], acm->devHandle, &reqData);
if (ret) {
HDF_LOGE("%{public}s: FillBulkRequest faile, ret=%{public}d \n",
__func__, ret);
return HDF_FAILURE;
}
}
return HDF_SUCCESS;
}
...
static int UsbAllocNotifyRequest(struct AcmDevice *acm)
{
struct UsbRawFillRequestData fillRequestData;
int size = acm->notifyEp->maxPacketSize;
int ret;
acm->notifyReq = UsbRawAllocRequest(acm->devHandle, 0, size);
if (!acm->notifyReq) {
HDF_LOGE("notifyReq request fail\n");
return HDF_ERR_MALLOC_FAIL;
}
fillRequestData.endPoint = acm->notifyEp->addr;
fillRequestData.length = size;
fillRequestData.numIsoPackets = 0;
fillRequestData.callback = AcmNotifyReqCallback;
fillRequestData.userData = (void *)acm;
fillRequestData.timeout = USB_CTRL_SET_TIMEOUT;
ret = UsbRawFillInterruptRequest(acm->notifyReq, acm->devHandle, &fillRequestData);
if (ret) {
HDF_LOGE("%{public}s: FillInterruptRequest faile, ret=%{public}d", __func__, ret);
return HDF_FAILURE;
}
return HDF_SUCCESS;
}
...
static int32_t UsbSerialInit(struct AcmDevice *acm)
{
struct UsbSession *session = NULL;
UsbRawHandle *devHandle = NULL;
int32_t ret;
if (acm->initFlag == true) {
HDF_LOGE("%{public}s:%{public}d: initFlag is true", __func__, __LINE__);
return HDF_SUCCESS;
}
ret = UsbRawInit(NULL);
if (ret) {
HDF_LOGE("%{public}s:%{public}d UsbRawInit faild", __func__, __LINE__);
return HDF_ERR_IO;
}
acm->session = session;
devHandle = UsbRawOpenDevice(session, acm->busNum, acm->devAddr);
if (devHandle == NULL) {
HDF_LOGE("%{public}s:%{public}d UsbRawOpenDevice faild", __func__, __LINE__);
ret = HDF_FAILURE;
goto err_open_device;
}
acm->devHandle = devHandle;
ret = UsbGetConfigDescriptor(devHandle, &acm->config);
if (ret) {
HDF_LOGE("%{public}s:%{public}d UsbGetConfigDescriptor faild", __func__, __LINE__);
ret = HDF_FAILURE;
goto err_get_desc;
}
ret = UsbParseConfigDescriptor(acm, acm->config);
if (ret != HDF_SUCCESS) {
HDF_LOGE("%{public}s:%{public}d UsbParseConfigDescriptor faild", __func__, __LINE__);
ret = HDF_FAILURE;
goto err_parse_desc;
}
ret = AcmWriteBufAlloc(acm);
if (ret < 0) {
HDF_LOGE("%{public}s:%{public}d AcmWriteBufAlloc faild", __func__, __LINE__);
ret = HDF_FAILURE;
goto err_alloc_write_buf;
}
ret = UsbAllocWriteRequests(acm);
if (ret < 0) {
HDF_LOGE("%{public}s:%{public}d UsbAllocWriteRequests faild", __func__, __LINE__);
ret = HDF_FAILURE;
goto err_alloc_write_reqs;
}
ret = UsbAllocNotifyRequest(acm);
if (ret) {
HDF_LOGE("%{public}s:%{public}d UsbAllocNotifyRequests faild", __func__, __LINE__);
goto err_alloc_notify_req;
}
ret = UsbAllocReadRequests(acm);
if (ret) {
HDF_LOGE("%{public}s:%{public}d UsbAllocReadRequests faild", __func__, __LINE__);
goto err_alloc_read_reqs;
}
ret = UsbStartIo(acm);
if (ret) {
HDF_LOGE("%{public}s:%{public}d UsbAllocReadRequests faild", __func__, __LINE__);
goto err_start_io;
}
acm->lineCoding.dwDTERate = CpuToLe32(DATARATE);
acm->lineCoding.bCharFormat = CHARFORMAT;
acm->lineCoding.bParityType = USB_CDC_NO_PARITY;
acm->lineCoding.bDataBits = USB_CDC_1_STOP_BITS;
ret = UsbRawSubmitRequest(acm->notifyReq);
if (ret) {
HDF_LOGE("%{public}s:%{public}d UsbRawSubmitRequest failed", __func__, __LINE__);
goto err_submit_req;
}
acm->initFlag = true;
HDF_LOGD("%{public}s:%{public}d=========================OK", __func__, __LINE__);
return HDF_SUCCESS;
err_submit_req:
UsbStopIo(acm);
err_start_io:
UsbFreeReadRequests(acm);
err_alloc_read_reqs:
UsbFreeNotifyReqeust(acm);
err_alloc_notify_req:
UsbFreeWriteRequests(acm);
err_alloc_write_reqs:
AcmWriteBufFree(acm);
err_alloc_write_buf:
UsbReleaseInterfaces(acm);
err_parse_desc:
UsbRawFreeConfigDescriptor(acm->config);
acm->config = NULL;
err_get_desc:
(void)UsbRawCloseDevice(devHandle);
err_open_device:
UsbRawExit(acm->session);
return ret;
}
static void UsbSerialRelease(struct AcmDevice *acm)
{
if (acm->initFlag == false) {
HDF_LOGE("%{public}s:%{public}d: initFlag is false", __func__, __LINE__);
return;
}
/* stop io thread and release all resources */
UsbStopIo(acm);
if (g_syncRequest != NULL) {
UsbRawFreeRequest(g_syncRequest);
g_syncRequest = NULL;
}
UsbFreeReadRequests(acm);
UsbFreeNotifyReqeust(acm);
UsbFreeWriteRequests(acm);
AcmWriteBufFree(acm);
(void)UsbRawCloseDevice(acm->devHandle);
UsbReleaseInterfaces(acm);
UsbRawFreeConfigDescriptor(acm->config);
acm->config = NULL;
UsbRawExit(acm->session);
acm->initFlag = false;
}
static int32_t UsbSerialDriverInit(struct HdfDeviceObject *device)
{
struct AcmDevice *acm = NULL;
int32_t ret;
if (device == NULL) {
HDF_LOGE("%{public}s:%{public}d device is null", __func__, __LINE__);
return HDF_ERR_INVALID_OBJECT;
}
acm = (struct AcmDevice *)device->service;
OsalMutexInit(&acm->readLock);
OsalMutexInit(&acm->writeLock);
ret = UsbSerialDeviceAlloc(acm);
if (ret != HDF_SUCCESS) {
HDF_LOGE("%{public}s:%{public}d UsbSerialDeviceAlloc faild", __func__, __LINE__);
}
acm->initFlag = false;
g_rawAcmReleaseFlag = false;
HDF_LOGD("%{public}s:%{public}d init ok!", __func__, __LINE__);
return ret;
}
static void UsbSerialDriverRelease(struct HdfDeviceObject *device)
{
struct AcmDevice *acm = NULL;
if (device == NULL) {
HDF_LOGE("%{public}s: device is NULL", __func__);
return;
}
acm = (struct AcmDevice *)device->service;
if (acm == NULL) {
HDF_LOGE("%{public}s: acm is null", __func__);
return;
}
g_rawAcmReleaseFlag = true;
if (acm->initFlag == true) {
HDF_LOGE("%{public}s:%{public}d UsbSerialRelease", __func__, __LINE__);
UsbSerialRelease(acm);
}
UsbSeriaDevicelFree(acm);
OsalMutexDestroy(&acm->writeLock);
OsalMutexDestroy(&acm->readLock);
OsalMutexDestroy(&acm->lock);
OsalMemFree(acm);
acm = NULL;
HDF_LOGD("%{public}s:%{public}d exit", __func__, __LINE__);
}
struct HdfDriverEntry g_usbSerialRawDriverEntry = {
.moduleVersion = 1,
.moduleName = "usbhost_acm_rawapi", //驱动模块名称，必须与hcs文件中配置的名称一致
.Bind = UsbSerialDriverBind,
.Init = UsbSerialDriverInit,
.Release = UsbSerialDriverRelease,
};
HDF_INIT(g_usbSerialRawDriverEntry);
```
### Device DDK API驱动开发<a name="section6356758162015"></a>
USB ACM设备核心代码路径为drivers\peripheral\usb\gadget\function\acm\cdcacm.c，其使用示例如下所示，首先根据描述符创建设备，然后获取接口，打开接口，获取Pipe信息，接收Event事件，接着进行USB通信（读写等），设备卸载时候，关闭接口，停止Event接收，删除设备。
```
1、创建设备
static int32_t AcmCreateFuncDevice(struct UsbAcmDevice *acm,
struct DeviceResourceIface *iface)
{
struct UsbFnDevice *fnDev = NULL;
struct UsbFnDescriptorData descData;
uint8_t useHcs;
...
if (useHcs == 0) {
descData.type = USBFN_DESC_DATA_TYPE_DESC;
descData.descriptor = &g_masterFuncDevice;
} else {
descData.type = USBFN_DESC_DATA_TYPE_PROP;
descData.property = device->property;
}
/* 创建设备 */
fnDev = (struct UsbFnDevice *)UsbFnDeviceCreate(acm->udcName, &descData);
if (fnDev == NULL) {
HDF_LOGE("%{public}s: create usb function device failed", __func__);
return HDF_FAILURE;
}
...
}
2、获取接口，打开接口，获取Pipe信息
static int32_t AcmParseEachPipe(struct UsbAcmDevice *acm, struct UsbAcmInterface *iface)
{
...
for (i = 0; i < fnIface->info.numPipes; i++) {
struct UsbFnPipeInfo pipeInfo;
/* 获取pipe信息 */
ret = UsbFnInterfaceGetPipeInfo(fnIface, i, &pipeInfo);
...
}
return HDF_SUCCESS;
}
/* 获取接口，打开接口获取handle */
static int32_t AcmParseEachIface(struct UsbAcmDevice *acm, struct UsbFnDevice *fnDev)
{
...
for (i = 0; i < fnDev->numInterfaces; i++) {
/* 获取接口 */
fnIface = (struct UsbFnInterface *)UsbFnDeviceGetInterface(fnDev, i);
...
/* 打开接口 */
handle = UsbFnInterfaceOpen(fnIface);
...
}
return HDF_SUCCESS;
}
3、接收Event事件
static int32_t AcmAllocCtrlRequests(struct UsbAcmDevice *acm, int num)
{
...
req = UsbFnCtrlRequestAlloc(acm->ctrlIface.handle,
sizeof(struct UsbCdcLineCoding) + sizeof(struct UsbCdcLineCoding));
...
}
static int32_t AcmDriverInit(struct HdfDeviceObject *device)
{
...
/* 开始接收Event */
ret = UsbFnInterfaceStartRecvEvent(acm->ctrlIface.fn, 0xff, UsbAcmEventCallback, acm);
...
}
4、进行USB通信（读写等）
static int32_t AcmSendNotifyRequest(struct UsbAcmDevice *acm, uint8_t type,
uint16_t value, void *data, uint32_t length)
{
...
/* 异步发送 */
ret = UsbFnRequestSubmitAsync(req);
...
}
5、关闭接口，停止Event接收，删除设备
static int32_t AcmReleaseFuncDevice(struct UsbAcmDevice *acm)
{
int32_t ret;
/* 关闭接口 */
(void)UsbFnInterfaceClose(acm->ctrlIface.handle);
(void)UsbFnInterfaceClose(acm->dataIface.handle);
/* 停止接收Event */
(void)UsbFnInterfaceStopRecvEvent(acm->ctrlIface.fn);
/* 删除设备 */
ret = UsbFnDeviceRemove(acm->fnDev);
if (ret != HDF_SUCCESS) {
HDF_LOGE("%{public}s: remove usb function device failed", __func__);
}
return ret;
}
```
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