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href="../../../topics/sdk/spinand/spi-nand-user-guide.html" id="spi_nand_user_guide-d4445e4239-link">SPI NAND 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="spi_nor_user_guide-d4445e4297" class="topicref" data-id="spi_nor_user_guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action spi_nor_user_guide-d4445e4297-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/spinor/spinor_user_guide.html" id="spi_nor_user_guide-d4445e4297-link">SPI NOR 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="concept_n3v_ttw_bzb-d4445e4354" class="topicref" data-id="concept_n3v_ttw_bzb" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action concept_n3v_ttw_bzb-d4445e4354-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/file-system/file-system-user-guide.html" id="concept_n3v_ttw_bzb-d4445e4354-link">文件系统使用指南</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="concept_mcc_32s_nbc-d4445e4438" class="topicref" data-id="concept_mcc_32s_nbc" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action concept_mcc_32s_nbc-d4445e4438-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-multi-media-sdk.html" id="concept_mcc_32s_nbc-d4445e4438-link">多媒体</a><div class="wh-tooltip"><p class="shortdesc">GE、VE、Display、DVP、MPP、MPP 播放器等多媒体模块的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="concept_nww_hzh_pzb-d4445e5947" class="topicref" data-id="concept_nww_hzh_pzb" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action concept_nww_hzh_pzb-d4445e5947-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-interface-sdk.html" id="concept_nww_hzh_pzb-d4445e5947-link">接口</a><div class="wh-tooltip"><p class="shortdesc">CAN、CIR、GPAI、GPIO、I2C、PSADC、PWM 等接口模块的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-safety-d4445e7944" class="topicref" data-id="chapter-safety" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-safety-d4445e7944-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-safety-sdk.html" id="chapter-safety-d4445e7944-link">安全</a><div class="wh-tooltip"><p class="shortdesc">SPI ENC、CE、eFuse 等安全模块的介绍和使用说明。</p></div></div></div></li></ul></li></ul></div>
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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">
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<span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" title="Edit this document" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/sdmc/sdmc-config.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">SDMC 配置</h1>
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<div class="date inPage">15 Jan 2024</div><div style="color: gray;">
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Read time: 5 minute(s)
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<div class="- topic/body concept/conbody body conbody">
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<p class="- topic/p p" data-ofbid="d151210e33__20250123155214">本节介绍了 SDMC 的参数配置流程。</p>
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<section class="- topic/section section" id="sdmc_configuration__section_azr_42w_mdc" data-ofbid="sdmc_configuration__section_azr_42w_mdc"><h2 class="- topic/title title sectiontitle">内核配置</h2>
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<ol class="- topic/ol ol" data-ofbid="d151210e41__20250123155214">
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<li class="- topic/li li" data-ofbid="d151210e43__20250123155214">
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<div class="- topic/div div">
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<div class="- topic/p p" data-ofbid="d151210e47__20250123155214">在 SDK 根目录下，执行下列命令，进入 kernel
|
||
的功能配置界面：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="sdmc_configuration__codeblock_wg1_3ml_sdc" data-ofbid="sdmc_configuration__codeblock_wg1_3ml_sdc"><code>make kernel-menuconfig</code></pre></div>
|
||
<p class="- topic/p p" data-ofbid="d151210e52__20250123155214">或使用简写命令</p>
|
||
<div class="- topic/p p" data-ofbid="d151210e55__20250123155214">
|
||
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="sdmc_configuration__codeblock_uss_hml_sdc" data-ofbid="sdmc_configuration__codeblock_uss_hml_sdc"><code>make km</code></pre>
|
||
</div>
|
||
</div>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d151210e63__20250123155214">
|
||
<div class="- topic/p p" data-ofbid="d151210e65__20250123155214">在内核配置界面，按如下选择：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="sdmc_configuration__pre_wpl_v4t_c1c" data-ofbid="sdmc_configuration__pre_wpl_v4t_c1c"><code>Linux
|
||
Device Drivers
|
||
<*> MMC/SD/SDIO card support
|
||
<*> MMC block device driver
|
||
<*> ArtInChip Memory Card Interface</code></pre></div>
|
||
</li>
|
||
</ol>
|
||
</section>
|
||
<section class="- topic/section section" id="sdmc_configuration__section_gwl_q2w_mdc" data-ofbid="sdmc_configuration__section_gwl_q2w_mdc"><h2 class="- topic/title title sectiontitle">SDMC 的扩展 DTS 参数</h2>
|
||
|
||
<div class="- topic/div div">
|
||
<p class="- topic/p p" data-ofbid="d151210e80__20250123155214">SDMC 驱动基于 Linux 内核的 MMC 子系统，而 MMC 子系统提供了很多常用的参数，详见代码
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">drivers/mmc/core/host.c</span> 中的函数
|
||
<span class="+ topic/keyword pr-d/apiname keyword apiname">mmc_of_parse()</span>。下表展示了部分扩展 DTS 参数：</p>
|
||
<div class="- topic/p p" data-ofbid="d151210e89__20250123155214">
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="sdmc_configuration__table_wfx_x4t_c1c" data-ofbid="sdmc_configuration__table_wfx_x4t_c1c" data-cols="4"><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"><strong class="+ topic/ph hi-d/b ph b">SDMC 的扩展 DTS 参数</strong></span></caption><colgroup><col style="width:22.37093690248566%"/><col style="width:19.120458891013385%"/><col style="width:21.606118546845124%"/><col style="width:36.90248565965583%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_configuration__table_wfx_x4t_c1c__entry__1">参数名称</th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_configuration__table_wfx_x4t_c1c__entry__2">类型</th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_configuration__table_wfx_x4t_c1c__entry__3">取值范围</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="sdmc_configuration__table_wfx_x4t_c1c__entry__4">功能说明</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__1">max-frequenc</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__2">Integer</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__3">> 0</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__4">控制器可输出的最大频率</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__1">bus-width</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__2">Integer</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__3">1, 4, 8</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__4">控制器的数据位宽</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__1">sd-uhs-sdr50</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__2">Boolean</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__3">有 - 1，无 - 0</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__4">配置 SDCard 的 SDR50 模式</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__1">no-sd</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__2">Boolean</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__3">有 - 1，无 - 0</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__4">关闭 SDCard 的功能支持</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__1">no-sdio</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__2">Boolean</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__3">有 - 1，无 - 0</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__4">关闭 SDIO 的功能支持</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__1">no-mmc</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__2">Boolean</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__3">有 - 1，无 - 0</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="sdmc_configuration__table_wfx_x4t_c1c__entry__4">关闭 eMMC 的功能支持</td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
</div>
|
||
<div class="- topic/p p" data-ofbid="d151210e223__20250123155214">SDMC 驱动在此基础上扩展了下列关于 FIFO 设置的参数：<div class="table-container"><table class="- topic/table table frame-all" id="sdmc_configuration__table_z11_bpt_c1c" data-ofbid="sdmc_configuration__table_z11_bpt_c1c" data-cols="4"><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">SDMC 的扩展 FIFO 参数</span></caption><colgroup><col style="width:22.244094488188974%"/><col style="width:19.685039370078737%"/><col style="width:21.653543307086615%"/><col style="width:36.417322834645674%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_configuration__table_z11_bpt_c1c__entry__1">参数名称</th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_configuration__table_z11_bpt_c1c__entry__2">类型</th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_configuration__table_z11_bpt_c1c__entry__3">取值范围</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="sdmc_configuration__table_z11_bpt_c1c__entry__4">功能说明</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_z11_bpt_c1c__entry__1">aic,fifo-depth</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_z11_bpt_c1c__entry__2">Integer</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_z11_bpt_c1c__entry__3">[1, 128]</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_configuration__table_z11_bpt_c1c__entry__4">控制器的 FIFO 深度</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_configuration__table_z11_bpt_c1c__entry__1">aic,fifo-watermark-aligned</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_configuration__table_z11_bpt_c1c__entry__2">Boolean</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_configuration__table_z11_bpt_c1c__entry__3">有 - 1，无 - 0</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="sdmc_configuration__table_z11_bpt_c1c__entry__4">FIFO 水位是按 2 的整数次幂对齐</td>
|
||
</tr>
|
||
</tbody></table></div></div>
|
||
</div>
|
||
</section>
|
||
<section class="- topic/section section" id="sdmc_configuration__section_gzq_3jw_mdc" data-ofbid="sdmc_configuration__section_gzq_3jw_mdc"><h2 class="- topic/title title sectiontitle">D211 配置</h2>
|
||
|
||
<div class="- topic/p p" data-ofbid="d151210e301__20250123155214">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/p p" data-ofbid="d151210e305__20250123155214">SDMC V1.0 包含三个接口，分别为 SDMC0、SDMC1 和 SDMC2，在 DTS 中体现为三个独立的设备节点。
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">common/d211.dtsi</span>
|
||
中的参数配置：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="sdmc_configuration__codeblock_awp_dpt_c1c" data-ofbid="sdmc_configuration__codeblock_awp_dpt_c1c"><code>sdmc0: sdmc@<span class="hl-number">10440000</span> {
|
||
compatible = <span class="hl-string">"artinchip,aic-sdmc-v1.0"</span>;
|
||
reg = <<span class="hl-number">0x0</span> <span class="hl-number">0x10440000</span> <span class="hl-number">0x0</span> <span class="hl-number">0x1000</span>>;
|
||
interrupts-extended = <&plic0 <span class="hl-number">46</span> IRQ_TYPE_LEVEL_HIGH>;
|
||
clocks = <&cmu CLK_SDMMC0>;
|
||
clock-names = <span class="hl-string">"ciu"</span>;
|
||
resets = <&rst RESET_SDMMC0>;
|
||
reset-names = <span class="hl-string">"reset"</span>;
|
||
#address-cells = <<span class="hl-number">1</span>>;
|
||
#size-cells = <<span class="hl-number">0</span>>;
|
||
max-frequency = <<span class="hl-number">24000000</span>>;
|
||
clock-frequency = <<span class="hl-number">48000000</span>>;
|
||
bus-width = <<span class="hl-number">4</span>>;
|
||
fifo-depth = <<span class="hl-number">128</span>>;
|
||
};
|
||
|
||
sdmc1: sdmc@<span class="hl-number">10450000</span> {
|
||
compatible = <span class="hl-string">"artinchip,aic-sdmc-v1.0"</span>;
|
||
reg = <<span class="hl-number">0x0</span> <span class="hl-number">0x10450000</span> <span class="hl-number">0x0</span> <span class="hl-number">0x1000</span>>;
|
||
interrupts-extended = <&plic0 <span class="hl-number">47</span> IRQ_TYPE_LEVEL_HIGH>;
|
||
clocks = <&cmu CLK_SDMMC1>;
|
||
clock-names = <span class="hl-string">"ciu"</span>;
|
||
resets = <&rst RESET_SDMMC1>;
|
||
reset-names = <span class="hl-string">"reset"</span>;
|
||
#address-cells = <<span class="hl-number">1</span>>;
|
||
#size-cells = <<span class="hl-number">0</span>>;
|
||
max-frequency = <<span class="hl-number">24000000</span>>;
|
||
clock-frequency = <<span class="hl-number">48000000</span>>;
|
||
bus-width = <<span class="hl-number">4</span>>;
|
||
fifo-depth = <<span class="hl-number">128</span>>;
|
||
};
|
||
|
||
sdmc2: sdmc@<span class="hl-number">10460000</span> {
|
||
compatible = <span class="hl-string">"artinchip,aic-sdmc-v1.0"</span>;
|
||
reg = <<span class="hl-number">0x0</span> <span class="hl-number">0x10460000</span> <span class="hl-number">0x0</span> <span class="hl-number">0x1000</span>>;
|
||
interrupts-extended = <&plic0 <span class="hl-number">48</span> IRQ_TYPE_LEVEL_HIGH>;
|
||
clocks = <&cmu CLK_SDMMC2>;
|
||
clock-names = <span class="hl-string">"ciu"</span>;
|
||
resets = <&rst RESET_SDMMC2>;
|
||
reset-names = <span class="hl-string">"reset"</span>;
|
||
#address-cells = <<span class="hl-number">1</span>>;
|
||
#size-cells = <<span class="hl-number">0</span>>;
|
||
};</code></pre></div>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section class="- topic/section section" id="sdmc_configuration__section_dp2_kjw_mdc" data-ofbid="sdmc_configuration__section_dp2_kjw_mdc"><h2 class="- topic/title title sectiontitle">Board 配置</h2>
|
||
|
||
<div class="- topic/div div">
|
||
<div class="- topic/p p" data-ofbid="d151210e323__20250123155214">本节按照以下功能定义三个控制器为例，进行 Board 配置：<ul class="- topic/ul ul" id="sdmc_configuration__ol_wkm_fpt_c1c" data-ofbid="sdmc_configuration__ol_wkm_fpt_c1c">
|
||
<li class="- topic/li li" data-ofbid="d151210e327__20250123155214">
|
||
<p class="- topic/p p" data-ofbid="d151210e329__20250123155214">SDMC0 - eMMC</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d151210e333__20250123155214">
|
||
<p class="- topic/p p" data-ofbid="d151210e335__20250123155214">SDMC1 - SDCard</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d151210e339__20250123155214">
|
||
<p class="- topic/p p" data-ofbid="d151210e341__20250123155214">SDMC2 - SDIO</p>
|
||
</li>
|
||
</ul></div>
|
||
<div class="- topic/p p" data-ofbid="d151210e346__20250123155214"><span class="+ topic/ph sw-d/filepath ph filepath">xxx/board.dts</span>
|
||
中的配置参数如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="sdmc_configuration__codeblock_bzt_fpt_c1c" data-ofbid="sdmc_configuration__codeblock_bzt_fpt_c1c"><code>&sdmc0 {
|
||
pinctrl-names = <span class="hl-string">"default"</span>;
|
||
pinctrl-<span class="hl-number">0</span> = <&sdmc0_pins>;
|
||
no-sd;
|
||
no-sdio;
|
||
status = <span class="hl-string">"okay"</span>;
|
||
};
|
||
|
||
&sdmc1 {
|
||
pinctrl-names = <span class="hl-string">"default"</span>;
|
||
pinctrl-<span class="hl-number">0</span> = <&sdmc1_pins>;
|
||
no-mmc;
|
||
no-sdio;
|
||
status = <span class="hl-string">"okay"</span>;
|
||
};
|
||
|
||
&sdmc2 {
|
||
pinctrl-names = <span class="hl-string">"default"</span>;
|
||
pinctrl-<span class="hl-number">0</span> = <&sdmc2_pins>;
|
||
no-mmc;
|
||
no-sd;
|
||
status = <span class="hl-string">"disabled"</span>;
|
||
};</code></pre></div>
|
||
</div>
|
||
</section>
|
||
<section class="- topic/section section" id="sdmc_configuration__section_e3z_kjw_mdc" data-ofbid="sdmc_configuration__section_e3z_kjw_mdc"><h2 class="- topic/title title sectiontitle">热插拔配置</h2>
|
||
|
||
<div class="- topic/p p" data-ofbid="d151210e361__20250123155214">SDMC 热插拔功能基于 Linux 内核的 MMC 子系统，MMC 子系统提供了下列热插拔实现方式：<div class="- topic/note note note note_note" id="sdmc_configuration__note_gfm_tfw_mdc" data-ofbid="sdmc_configuration__note_gfm_tfw_mdc"><span class="note__title">注：</span> <div class="note__body">SDMC1
|
||
控制器硬件支持热插拔中断，且 SDMC 驱动中默认已使能，无需另外配置。本节主要介绍 SDMC0/2 控制器的热插拔配置。</div></div><ul class="- topic/ul ul" id="sdmc_configuration__ol_vcv_hpt_c1c" data-ofbid="sdmc_configuration__ol_vcv_hpt_c1c">
|
||
<li class="- topic/li li" data-ofbid="d151210e367__20250123155214">轮询监控：每隔一段时间扫描一次 mmc 硬件总线，一般是 HZ，1s）。<div class="- topic/p p" data-ofbid="d151210e369__20250123155214">对于 SDMC0 控制器，如需以轮询监控方式配置热插拔功能，则在
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">xxx/board.dts</span>
|
||
中配置如下参数：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="sdmc_configuration__codeblock_wgn_kpt_c1c" data-ofbid="sdmc_configuration__codeblock_wgn_kpt_c1c"><code>&sdmc0 {
|
||
pinctrl-names = <span class="hl-string">"default"</span>;
|
||
pinctrl-<span class="hl-number">0</span> = <&sdmc0_pins>;
|
||
broken-cd;
|
||
status = <span class="hl-string">"okay"</span>;
|
||
};</code></pre></div></li>
|
||
<li class="- topic/li li" data-ofbid="d151210e377__20250123155214">中断监控：通过 card detect (cd) 引脚电平变化触发中断，从而告知 CPU 当前 sdcard 插入状态发生了变化。<div class="- topic/p p" data-ofbid="d151210e379__20250123155214">对于 SDMC2
|
||
控制器，如需以中断监控方式配置热插拔，则在 <span class="+ topic/ph sw-d/filepath ph filepath">xxx/board.dts</span>
|
||
中配置参如下参数：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="sdmc_configuration__codeblock_nvv_kpt_c1c" data-ofbid="sdmc_configuration__codeblock_nvv_kpt_c1c"><code>&sdmc2 {
|
||
pinctrl-names = <span class="hl-string">"default"</span>;
|
||
pinctrl-<span class="hl-number">0</span> = <&sdmc2_pins>;
|
||
cd-inverted;<em class="hl-comment">//根据硬件设计配置</em>
|
||
cd-gpios = <&gpio_c <span class="hl-number">8</span> GPIO_ACTIVE_HIGH>;<em class="hl-comment">//根据硬件设计配置</em>
|
||
cd-debounce-delay-ms = <<span class="hl-number">250</span>>;
|
||
status = <span class="hl-string">"okay"</span>;
|
||
};</code></pre></div></li>
|
||
</ul></div>
|
||
<div class="- topic/p p" data-ofbid="d151210e388__20250123155214">MMC 子系统中提供了以下关于热插拔的参数，如下表所示：<div class="table-container"><table class="- topic/table table frame-all" id="sdmc_configuration__table_wcv_hpt_c1c" data-ofbid="sdmc_configuration__table_wcv_hpt_c1c" data-cols="4"><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"> 3</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">热插拔配置参数</span></caption><colgroup><col style="width:23.2597623089983%"/><col style="width:16.97792869269949%"/><col style="width:28.183361629881148%"/><col style="width:31.57894736842105%"/></colgroup><thead class="- topic/thead thead">
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<tr class="- topic/row">
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<th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_configuration__table_wcv_hpt_c1c__entry__1">参数名称</th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_configuration__table_wcv_hpt_c1c__entry__2">类型</th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_configuration__table_wcv_hpt_c1c__entry__3">取值范围</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="sdmc_configuration__table_wcv_hpt_c1c__entry__4">功能说明</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wcv_hpt_c1c__entry__1">cd-inverted</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wcv_hpt_c1c__entry__2">Boolean</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wcv_hpt_c1c__entry__3">有 - 1，无 - 0</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_configuration__table_wcv_hpt_c1c__entry__4">gpio 检测电平翻转</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wcv_hpt_c1c__entry__1">cd-debounce-delay-ms</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wcv_hpt_c1c__entry__2">Integer</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wcv_hpt_c1c__entry__3">> 0</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_configuration__table_wcv_hpt_c1c__entry__4">gpio 消抖（默认 200 ms）</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wcv_hpt_c1c__entry__1">broken-cd</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wcv_hpt_c1c__entry__2">Boolean</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_configuration__table_wcv_hpt_c1c__entry__3">有 - 1，无 - 0</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_configuration__table_wcv_hpt_c1c__entry__4">配置为轮询监控功能</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_configuration__table_wcv_hpt_c1c__entry__1">cd-gpios</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_configuration__table_wcv_hpt_c1c__entry__2">Array</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_configuration__table_wcv_hpt_c1c__entry__3">同普通 gpio 配置</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="sdmc_configuration__table_wcv_hpt_c1c__entry__4">配置中断监控的 gpio 值</td>
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</tr>
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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="#sdmc_configuration__section_azr_42w_mdc" data-tocid="sdmc_configuration__section_azr_42w_mdc">内核配置</a></div></li><li class="section-item"><div class="section-title"><a href="#sdmc_configuration__section_gwl_q2w_mdc" data-tocid="sdmc_configuration__section_gwl_q2w_mdc">SDMC 的扩展 DTS 参数</a></div></li><li class="section-item"><div class="section-title"><a href="#sdmc_configuration__section_gzq_3jw_mdc" data-tocid="sdmc_configuration__section_gzq_3jw_mdc">D211 配置</a></div></li><li class="section-item"><div class="section-title"><a href="#sdmc_configuration__section_dp2_kjw_mdc" data-tocid="sdmc_configuration__section_dp2_kjw_mdc">Board 配置</a></div></li><li class="section-item"><div class="section-title"><a href="#sdmc_configuration__section_e3z_kjw_mdc" data-tocid="sdmc_configuration__section_e3z_kjw_mdc">热插拔配置</a></div></li></ul></div>
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