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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic concept/concept topic concept" role="article" aria-labelledby="ariaid-title1"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/mac/mac_func_param.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">功能参数描述</h1><div class="date inPage">3 Dec 2024</div><div style="color: gray;">
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Read time: 3 minute(s)
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</div><div class="- topic/body concept/conbody body conbody"><p class="- topic/p p" data-ofbid="d300945e22__20250121171807">功能参数主要针对某一个使用方案而定，因此随着方案的不同，参数很可能不同，这些参数主要在文件<span class="+ topic/ph sw-d/filepath ph filepath">
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target/d211/xxx/board.dts</span>中，功能参数的设置必须和硬件原理图相匹配。</p><section class="- topic/section section" id="mac_function_parameter_configuration__section_gk5_qws_4dc" data-ofbid="mac_function_parameter_configuration__section_gk5_qws_4dc"><h2 class="- topic/title title sectiontitle">GMAC 功能参数描述</h2>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="mac_function_parameter_configuration__codeblock_sjd_5ws_4dc" data-ofbid="mac_function_parameter_configuration__codeblock_sjd_5ws_4dc">&gmac0 {
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pinctrl-names = <span class="hl-string">"default"</span>;
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pinctrl-<span class="hl-number">0</span> = <&gmac0_<span class="hl-number">1000</span>m_pins>;
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phy-handle = <&gmac0_phy>;
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phy-reset-gpios = <&gpio_d <span class="hl-number">3</span> GPIO_ACTIVE_HIGH>;
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phy-addr = <<span class="hl-number">1</span>>;
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phy-mode = <span class="hl-string">"rgmii"</span>;
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max-speed = <<span class="hl-number">1000</span>>;
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aic,tx-delay = <<span class="hl-number">0xc</span>>;
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aic,rx-delay = <<span class="hl-number">0xc</span>>;
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status = <span class="hl-string">"okay"</span>;
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gmac0_<span class="hl-number">1000</span>m_pins: gmac0-<span class="hl-number">0</span> {
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pins {
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pinmux = <AIC_PINMUX(<span class="hl-string">'E'</span>, <span class="hl-number">0</span>, <span class="hl-number">6</span>)>,
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<AIC_PINMUX(<span class="hl-string">'E'</span>, <span class="hl-number">1</span>, <span class="hl-number">6</span>)>,
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<AIC_PINMUX(<span class="hl-string">'E'</span>, <span class="hl-number">2</span>, <span class="hl-number">6</span>)>,
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<AIC_PINMUX(<span class="hl-string">'E'</span>, <span class="hl-number">3</span>, <span class="hl-number">6</span>)>,
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<AIC_PINMUX(<span class="hl-string">'E'</span>, <span class="hl-number">4</span>, <span class="hl-number">6</span>)>,
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<AIC_PINMUX(<span class="hl-string">'E'</span>, <span class="hl-number">5</span>, <span class="hl-number">6</span>)>,
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<AIC_PINMUX(<span class="hl-string">'E'</span>, <span class="hl-number">6</span>, <span class="hl-number">6</span>)>,
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<AIC_PINMUX(<span class="hl-string">'E'</span>, <span class="hl-number">7</span>, <span class="hl-number">6</span>)>,
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<AIC_PINMUX(<span class="hl-string">'E'</span>, <span class="hl-number">8</span>, <span class="hl-number">6</span>)>,
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<AIC_PINMUX(<span class="hl-string">'E'</span>, <span class="hl-number">9</span>, <span class="hl-number">6</span>)>,
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<AIC_PINMUX(<span class="hl-string">'E'</span>, <span class="hl-number">10</span>, <span class="hl-number">6</span>)>,
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<AIC_PINMUX(<span class="hl-string">'E'</span>, <span class="hl-number">11</span>, <span class="hl-number">6</span>)>,
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<AIC_PINMUX(<span class="hl-string">'E'</span>, <span class="hl-number">12</span>, <span class="hl-number">6</span>)>,
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<AIC_PINMUX(<span class="hl-string">'E'</span>, <span class="hl-number">13</span>, <span class="hl-number">6</span>)>,
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<AIC_PINMUX(<span class="hl-string">'E'</span>, <span class="hl-number">14</span>, <span class="hl-number">6</span>)>,
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<AIC_PINMUX(<span class="hl-string">'E'</span>, <span class="hl-number">15</span>, <span class="hl-number">6</span>)>;
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bias-disable;
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drive-strength = <<span class="hl-number">3</span>>;
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};
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};</pre>
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<div class="- topic/p p" data-ofbid="d300945e35__20250121171807">
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<div class="table-container"><table class="- topic/table table frame-all" id="mac_function_parameter_configuration__table_sxm_4vs_4dc" data-ofbid="mac_function_parameter_configuration__table_sxm_4vs_4dc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 1</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">GMAC 参数描述</span></caption><colgroup><col style="width:28.57142857142857%"/><col style="width:71.42857142857143%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__1">参数名称</th><th class="- topic/entry entry colsep-0 rowsep-1" id="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__2">描述</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__1">pinctrl-names</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__2">SDK 一般会把要使用的某一功能的端口组预先定义，后期直接使用即可，定义一般放在
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<span class="+ topic/ph sw-d/filepath ph filepath">target/d211/common/d211-pinctrl.dtsi</span>
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文件中。 <p class="- topic/p p" data-ofbid="d300945e58__20250121171807">设置为 “default”。</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__1">pinctrl-0</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__2">
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<p class="- topic/p p" data-ofbid="d300945e65__20250121171807">指示 MAC 预先定义的端口组</p>
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</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__1">phy-handle</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__2">
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<p class="- topic/p p" data-ofbid="d300945e73__20250121171807">MAC 和 PHY 通过 mdio 通信，因此要设定 phy 的寄存器读写地址，phy-handle 指示具体的 PHY
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的配置引用对象，该对象一般包含在 MDIO 的配置中。</p>
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</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__1">phy-reset-gpios</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__2">
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<p class="- topic/p p" data-ofbid="d300945e81__20250121171807">因为 SOC 集成了 MAC，因此 MAC 的 reset 可以通过某一个寄存器完成，但对于外挂 PHY 的
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SOC，需要提供一个 gpio 做 PHY 的 reset 操作，因为 MAC 和 PHY 的 reset
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操作需要尽量保持同步才能使二者的状态同步</p>
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</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__1">phy-addr</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__2">
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<p class="- topic/p p" data-ofbid="d300945e89__20250121171807">PHY 在 MII 总线上的挂载地址，一般在硬件设计原理图有标注，如果没有特殊声明，则默认设置为 1 即可，驱动中会对该
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MII 总线进行查询，来确定该地址是否有 PHY 设备</p>
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</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__1">phy-mode</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__2">
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<p class="- topic/p p" data-ofbid="d300945e97__20250121171807">PHY 和 MAC
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的工作模式，目前可选的配置项有：RMII，RGMII，RGMII-ID，RGMII，RGMII-RXID，RGMII-TXID，千兆网口要有延时配置，参考
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<a xml:lang="zh-CN" lang="zh-CN" class="- topic/xref xref" href="mac_func_param.html#mac_function_parameter_configuration__section_lp3_cyr_21c">工作模式</a> 章节详细了解</p>
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||
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__1">max-speed</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__2">
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<p class="- topic/p p" data-ofbid="d300945e109__20250121171807">限制的端口的最大速度</p>
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</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__1">aic,tx-delay</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__2">
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||
<p class="- topic/p p" data-ofbid="d300945e117__20250121171807">千兆 PHY 的发送时延，该参数对百兆 PHY 无效，如果 PHY 的 spec
|
||
上有特殊要求，则按要求填写，否则设置默认值为 0xC 即可，</p>
|
||
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__1">aic,rx-delay</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__2">
|
||
<p class="- topic/p p" data-ofbid="d300945e125__20250121171807">千兆 PHY 的接收时延，该参数对百兆 PHY 无效，如果 PHY 的 spec
|
||
上有特殊要求，则按要求填写，否则设置默认值为 0xC 即可，</p>
|
||
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__1">aic,use_extclk</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="mac_function_parameter_configuration__table_sxm_4vs_4dc__entry__2">
|
||
<p class="- topic/p p" data-ofbid="d300945e133__20250121171807">百兆 PHY 是否外部 clk，设置该项说明使用外部独立时钟，否则将使用 SOC
|
||
内部的时钟，此值需要结合硬件设计设置，参考<a xml:lang="zh-CN" lang="zh-CN" class="- topic/xref xref" href="mac_config.html#mac_configuration__section_zym_1xs_4dc">时钟配置</a></p>
|
||
</td></tr></tbody></table></div>
|
||
</div>
|
||
</section><section class="- topic/section section" id="mac_function_parameter_configuration__section_sdx_rws_4dc" data-ofbid="mac_function_parameter_configuration__section_sdx_rws_4dc"><h2 class="- topic/title title sectiontitle">MDIO 功能参数描述</h2>
|
||
|
||
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="mac_function_parameter_configuration__codeblock_g21_wws_4dc" data-ofbid="mac_function_parameter_configuration__codeblock_g21_wws_4dc">gmac0_mdio: mdio {
|
||
compatible = <span class="hl-string">"aicmac-mdio"</span>;
|
||
gmac0_phy: ethernet-phy@<span class="hl-number">1</span> {
|
||
reg = <<span class="hl-number">1</span>>;
|
||
};
|
||
};
|
||
};</pre>
|
||
<div class="- topic/p p" data-ofbid="d300945e149__20250121171807">
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="mac_function_parameter_configuration__table_fsx_vvs_4dc" data-ofbid="mac_function_parameter_configuration__table_fsx_vvs_4dc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 2</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">MDIO 功能参数描述</span></caption><colgroup><col style="width:28.985507246376812%"/><col style="width:71.01449275362319%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="mac_function_parameter_configuration__table_fsx_vvs_4dc__entry__1"></th><th class="- topic/entry entry colsep-0 rowsep-1" id="mac_function_parameter_configuration__table_fsx_vvs_4dc__entry__2"></th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="mac_function_parameter_configuration__table_fsx_vvs_4dc__entry__1">ethernet-phy</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="mac_function_parameter_configuration__table_fsx_vvs_4dc__entry__2">
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<p class="- topic/p p" data-ofbid="d300945e167__20250121171807">PHY 的参数信息描述，被 MAC 的配置参数中的 phy-handle 引用</p>
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||
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="mac_function_parameter_configuration__table_fsx_vvs_4dc__entry__1">reg</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="mac_function_parameter_configuration__table_fsx_vvs_4dc__entry__2">
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||
<p class="- topic/p p" data-ofbid="d300945e175__20250121171807">PHY 的读写寄存器，PHY 设备的很多寄存器是标准的，在代码中直接定义了，此处一般设为 1 即可</p>
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</td></tr></tbody></table></div>
|
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</div>
|
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</section><section class="- topic/section section" id="mac_function_parameter_configuration__section_lp3_cyr_21c" data-ofbid="mac_function_parameter_configuration__section_lp3_cyr_21c"><h2 class="- topic/title title sectiontitle">工作模式</h2>
|
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|
||
<p class="- topic/p p" data-ofbid="d300945e185__20250121171807">SOC 中自带了 MAC 模块，MAC 在和 PHY 配合工作前需要协商好二者的工作模式，因此需要配置 PHY 模块的工作模式，目前 MAC 仅支持 Reduced
|
||
接口</p>
|
||
<ul class="- topic/ul ul" id="mac_function_parameter_configuration__ul_mp3_cyr_21c" data-ofbid="mac_function_parameter_configuration__ul_mp3_cyr_21c"><li class="- topic/li li" data-ofbid="d300945e189__20250121171807">
|
||
<p class="- topic/p p" data-ofbid="d300945e191__20250121171807">RMII： 百兆模式</p>
|
||
</li><li class="- topic/li li" data-ofbid="d300945e194__20250121171807">
|
||
<p class="- topic/p p" data-ofbid="d300945e196__20250121171807">RGMII：千兆模式</p>
|
||
<p class="- topic/p p" data-ofbid="d300945e199__20250121171807">千兆网络 RGMII
|
||
采用边沿触发，上升沿发送一字节数据的低四位，下降沿发送剩余的高四位数数据。接收端时钟采用双边沿采样，但是如果不做额外处理，接收端无法稳定采样，为了解决这一问题，常见的作法是为时钟信号添加延时，使其边沿对准数据总线的稳定区间。</p>
|
||
</li></ul>
|
||
<p class="- topic/p p" data-ofbid="d300945e203__20250121171807">可以在控制器端（时钟端）或者 PHY 芯片内部添加时延，同一时间只能有一处时延，PHY 模块通过 phy-mode 设置项的参数和 MAC 端进行沟通协商：</p>
|
||
<ul class="- topic/ul ul" id="mac_function_parameter_configuration__ul_np3_cyr_21c" data-ofbid="mac_function_parameter_configuration__ul_np3_cyr_21c"><li class="- topic/li li" data-ofbid="d300945e207__20250121171807">rgmii<p class="- topic/p p" data-ofbid="d300945e209__20250121171807">MAC 端进行时延设置，则在 <span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span> 文件中 aic,tx-delay 和
|
||
aic,rx-delay 均应被配置</p></li><li class="- topic/li li" data-ofbid="d300945e214__20250121171807">rgmii-id<p class="- topic/p p" data-ofbid="d300945e216__20250121171807">PHY 芯片进行时延设置，则在 <span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span> 文件中 aic,tx-delay 和
|
||
aic,rx-delay 均不能被配置</p></li><li class="- topic/li li" data-ofbid="d300945e221__20250121171807">rgmii-rxid<p class="- topic/p p" data-ofbid="d300945e223__20250121171807">PHY 芯片进行 RX 时延配置，MAC 端进行 TX 时延设置，则在 <span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span>
|
||
文件中 aic,tx-delay 应被配置</p></li><li class="- topic/li li" data-ofbid="d300945e228__20250121171807">rgmii-txid<p class="- topic/p p" data-ofbid="d300945e230__20250121171807">PHY 芯片进行 TX 时延配置，MAC 端进行 RX 时延设置，则在 <span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span>
|
||
文件中 aic,rx-delay 应被配置</p></li></ul>
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</section></div></article></main></div>
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<div class=" wh_topic_toc "><div class="wh_topic_label">在本页上</div><ul><li class="section-item"><div class="section-title"><a href="#mac_function_parameter_configuration__section_gk5_qws_4dc" data-tocid="mac_function_parameter_configuration__section_gk5_qws_4dc">GMAC 功能参数描述</a></div></li><li class="section-item"><div class="section-title"><a href="#mac_function_parameter_configuration__section_sdx_rws_4dc" data-tocid="mac_function_parameter_configuration__section_sdx_rws_4dc">MDIO 功能参数描述</a></div></li><li class="section-item"><div class="section-title"><a href="#mac_function_parameter_configuration__section_lp3_cyr_21c" data-tocid="mac_function_parameter_configuration__section_lp3_cyr_21c">工作模式</a></div></li></ul></div>
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