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<head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><meta name="description" content="相关模块 源码路径 NVMEM subsystem source/linux-5.10/drivers/nvmem/core Driver source/linux-5.10/drivers/nvmem/artinchip-sid.c 模块架构 eFuse 在内核中通过 NVMEM 层对接其他各模块。NVMEM 在内核中被虚拟为一个总线上，可以挂载各种 NVMEM 设备。 图 1 . NVMEM ..."/><meta name="DC.rights.owner" content="(C) 版权 2025"/><meta name="copyright" content="(C) 版权 2025"/><meta name="generator" content="DITA-OT"/><meta name="DC.type" content="concept"/><meta name="DC.relation" content="../../../topics/sdk/efuse/efuse_user_guide.html"/><meta name="DC.relation" content="../../../topics/sdk/efuse/efuse_test.html"/><meta name="DC.relation" content="../../../topics/sdk/spienc/spi-enc-user-guide.html"/><meta name="DC.contributor" content="yan.wang"/><meta name="DC.contributor" content="yan.wang"/><meta name="DC.date.modified" content="2024-01-15"/><meta name="DC.format" content="HTML5"/><meta name="DC.identifier" content="efuse_design_intro"/><meta name="DC.language" content="zh-CN"/><title>设计说明</title><!-- Generated with build number 2024112209. --><meta name="wh-path2root" content="../../../"/><meta name="wh-toc-id" content="efuse_design_intro-d4445e8171"/><meta name="wh-source-relpath" content="topics/sdk/efuse/efuse-design_intro.dita"/><meta name="wh-out-relpath" content="topics/sdk/efuse/efuse-design_intro.html"/>
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role="treeitem" aria-expanded="false"><div data-tocid="chapter-memory-d4445e4054" class="topicref" data-id="chapter-memory" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-memory-d4445e4054-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-memory-sdk.html" id="chapter-memory-d4445e4054-link">存储</a><div class="wh-tooltip"><p class="shortdesc">SDMC、SPI NAND、SPI NOR 等存储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_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="true"><div data-tocid="chapter-safety-d4445e7944" class="topicref" data-id="chapter-safety" data-state="expanded"><span role="button" tabindex="0" aria-labelledby="button-collapse-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><ul role="group" class="navbar-nav nav-list"><li role="treeitem" aria-expanded="false"><div data-tocid="ce_user_guide-d4445e7961" class="topicref" data-id="ce_user_guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action ce_user_guide-d4445e7961-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/ce/ce_user_guide.html" id="ce_user_guide-d4445e7961-link">CE 使用指南</a></div></div></li><li role="treeitem" aria-expanded="true"><div data-tocid="efuse_user_guide-d4445e8115" class="topicref" data-id="efuse_user_guide" data-state="expanded"><span role="button" tabindex="0" aria-labelledby="button-collapse-action efuse_user_guide-d4445e8115-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/efuse/efuse_user_guide.html" id="efuse_user_guide-d4445e8115-link">eFuse 使用指南</a></div></div><ul role="group" class="navbar-nav nav-list"><li role="treeitem"><div data-tocid="efuse_configuration-d4445e8129" class="topicref" data-id="efuse_configuration" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/efuse/efuse_config.html" id="efuse_configuration-d4445e8129-link">eFuse 配置</a></div></div></li><li role="treeitem"><div data-tocid="efuse_debug_guide-d4445e8143" class="topicref" data-id="efuse_debug_guide" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/efuse/efuse_debug.html" id="efuse_debug_guide-d4445e8143-link">调试指南</a></div></div></li><li role="treeitem"><div data-tocid="efuse_test_guide-d4445e8157" class="topicref" data-id="efuse_test_guide" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/efuse/efuse_test.html" id="efuse_test_guide-d4445e8157-link">测试指南</a></div></div></li><li role="treeitem" class="active"><div data-tocid="efuse_design_intro-d4445e8171" class="topicref" data-id="efuse_design_intro" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/efuse/efuse-design_intro.html" id="efuse_design_intro-d4445e8171-link">设计说明</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="spi_enc_user_guide-d4445e8185" class="topicref" data-id="spi_enc_user_guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action spi_enc_user_guide-d4445e8185-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/spienc/spi-enc-user-guide.html" id="spi_enc_user_guide-d4445e8185-link">SPI ENC</a></div></div></li></ul></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/efuse/efuse-design_intro.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">设计说明</h1>
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<div class="date inPage">15 Jan 2024</div><div style="color: gray;">
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Read time: 2 minute(s)
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</div>
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<div class="- topic/body concept/conbody body conbody">
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<div class="table-container"><table class="- topic/table table frame-all" id="efuse_design_intro__table_bxg_mqy_21c" data-ofbid="efuse_design_intro__table_bxg_mqy_21c" data-cols="2"><caption></caption><colgroup><col style="width:42.91845493562232%"/><col style="width:57.08154506437768%"/></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="efuse_design_intro__table_bxg_mqy_21c__entry__1">相关模块</th>
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<th class="- topic/entry entry colsep-0 rowsep-1" id="efuse_design_intro__table_bxg_mqy_21c__entry__2">源码路径</th>
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</thead><tbody class="- topic/tbody tbody">
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<tr class="- topic/row">
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="efuse_design_intro__table_bxg_mqy_21c__entry__1">NVMEM subsystem</td>
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="efuse_design_intro__table_bxg_mqy_21c__entry__2"><span class="+ topic/ph sw-d/filepath ph filepath">source/linux-5.10/drivers/nvmem/core</span></td>
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<tr class="- topic/row">
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<td class="- topic/entry entry colsep-1 rowsep-0" headers="efuse_design_intro__table_bxg_mqy_21c__entry__1">Driver</td>
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<td class="- topic/entry entry colsep-0 rowsep-0" headers="efuse_design_intro__table_bxg_mqy_21c__entry__2"><span class="+ topic/ph sw-d/filepath ph filepath">source/linux-5.10/drivers/nvmem/artinchip-sid.c</span></td>
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<section class="- topic/section section" id="efuse_design_intro__section_cxg_mqy_21c" data-ofbid="efuse_design_intro__section_cxg_mqy_21c"><h2 class="- topic/title title sectiontitle">模块架构</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d61883e83__20250123155203">eFuse 在内核中通过 NVMEM 层对接其他各模块。NVMEM 在内核中被虚拟为一个总线上，可以挂载各种 NVMEM 设备。</p>
|
||
<figure class="- topic/fig fig fignone" id="efuse_design_intro__fig_fgm_tqy_21c" data-ofbid="efuse_design_intro__fig_fgm_tqy_21c">
|
||
|
||
<div class="- topic/p p" data-ofbid="d61883e91__20250123155203"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="efuse_design_intro__image_dxg_mqy_21c" src="../../../images/efuse/nvmem_kernel.png" alt="nvmem_kernel"/></div><br/></div>
|
||
<figcaption data-caption-side="bottom" class="- topic/title title figcap"><span class="figtitleprefix fig--title-label">图<span class="fig--title-label-number"> 1</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">NVMEM 内核架构</span></figcaption></figure>
|
||
<p class="- topic/p p" data-ofbid="d61883e99__20250123155203">在内核中，其他模块透过 <span class="+ topic/keyword pr-d/apiname keyword apiname">NVMEM Consumer API</span> 进行读写交互。 在用户空间，应用程序可以通过 sysfs 文件节点
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">sys/bus/nvmem/devices/*/nvmem</span> 进行读写操作。多数设备仅支持用户空间应用程序读，不支持写。</p>
|
||
<p class="- topic/p p" data-ofbid="d61883e108__20250123155203">在 NVMEM 中，有存储设备(Device)和存储单元(Cell) 的概念。除了将 Device 注册到 NVMEM 之外，还可以注册 Cell。 比如 eFuse
|
||
中，eFuse 就是一个设备，设备中可以划分 Cell：</p>
|
||
<div class="- topic/p p" data-ofbid="d61883e112__20250123155203">
|
||
<figure class="- topic/fig fig fignone" id="efuse_design_intro__fig_oz5_sqy_21c" data-ofbid="efuse_design_intro__fig_oz5_sqy_21c">
|
||
|
||
<br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="efuse_design_intro__image_exg_mqy_21c" src="../../../images/efuse/nvmem_cell.png" alt="nvmem_cell"/></div><br/>
|
||
<figcaption data-caption-side="bottom" class="- topic/title title figcapcenter"><span class="figtitleprefix fig--title-label">图<span class="fig--title-label-number"> 2</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">存储单元</span></figcaption></figure>
|
||
</div>
|
||
<p class="- topic/p p" data-ofbid="d61883e127__20250123155203">在配置 DTS 时可描述 Device 需要暴露的 Cell 信息，包括位置、大小等。比如：</p>
|
||
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="efuse_design_intro__pre_fxg_mqy_21c" data-ofbid="efuse_design_intro__pre_fxg_mqy_21c"><code>sid: sid@<span class="hl-number">19010000</span> {
|
||
compatible = <span class="hl-string">"artinchip,sid-v1.0"</span>;
|
||
reg = <<span class="hl-number">0x19010000</span> <span class="hl-number">0x1000</span>>;
|
||
clocks = <&cmu CLK_SID>;
|
||
resets = <&rst RESET_SID>;
|
||
chip_id: chip-id@<span class="hl-number">10</span> {
|
||
reg = <<span class="hl-number">0x10</span> <span class="hl-number">0x18</span>>;
|
||
};
|
||
test-config: test-config@<span class="hl-number">20</span> {
|
||
reg = <<span class="hl-number">0x20</span> <span class="hl-number">0x1</span>>;
|
||
bits = <<span class="hl-number">2</span> <span class="hl-number">4</span>>;
|
||
};
|
||
};
|
||
</code></pre>
|
||
<p class="- topic/p p" data-ofbid="d61883e133__20250123155203">此处描述了一个 test-config cell：</p>
|
||
<ul class="- topic/ul ul" id="efuse_design_intro__ul_hxg_mqy_21c" data-ofbid="efuse_design_intro__ul_hxg_mqy_21c">
|
||
<li class="- topic/li li" data-ofbid="d61883e138__20250123155203">
|
||
<p class="- topic/p p" data-ofbid="d61883e140__20250123155203">位置：在 eFuse 的 0x20 字节偏移处</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d61883e144__20250123155203">
|
||
<p class="- topic/p p" data-ofbid="d61883e146__20250123155203">长度：0x1 字节</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d61883e150__20250123155203">
|
||
<p class="- topic/p p" data-ofbid="d61883e152__20250123155203">内容：从该字节的 2 比特偏移处开始，共 4 比特长的范围</p>
|
||
</li>
|
||
</ul>
|
||
</section>
|
||
|
||
<section class="- topic/section section" id="efuse_design_intro__section_nrh_qqy_21c" data-ofbid="efuse_design_intro__section_nrh_qqy_21c"><h2 class="- topic/title title sectiontitle">关键流程设计</h2>
|
||
|
||
<div class="- topic/p p" data-ofbid="d61883e163__20250123155203"><strong class="+ topic/ph hi-d/b ph b">初始化流程</strong><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="efuse_design_intro__codeblock_cdx_rqy_21c" data-ofbid="efuse_design_intro__codeblock_cdx_rqy_21c"><code>aic_sid_probe();
|
||
|-> res = platform_get_resource(pdev, IORESOURCE_MEM, <span class="hl-number">0</span>);
|
||
|-> sid->base = devm_ioremap_resource(dev, res);
|
||
|-> nvmem = devm_nvmem_register(dev, nvmem_cfg);
|
||
|-> platform_set_drvdata(pdev, nvmem);</code></pre></div>
|
||
|
||
|
||
</section>
|
||
<section class="- topic/section section" id="efuse_design_intro__section_zjk_4qy_21c" data-ofbid="efuse_design_intro__section_zjk_4qy_21c"><h2 class="- topic/title title sectiontitle">数据结构设计</h2>
|
||
|
||
<div class="- topic/p p" data-ofbid="d61883e175__20250123155203">
|
||
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="efuse_design_intro__codeblock_lwl_pqy_21c" data-ofbid="efuse_design_intro__codeblock_lwl_pqy_21c"><code><strong class="hl-keyword">struct</strong> aic_sid {
|
||
<strong class="hl-keyword">void</strong> __iomem *base;
|
||
};</code></pre>
|
||
</div>
|
||
</section>
|
||
<section class="- topic/section section" id="efuse_design_intro__section_fkm_nqy_21c" data-ofbid="efuse_design_intro__section_fkm_nqy_21c"><h2 class="- topic/title title sectiontitle">接口设计</h2>
|
||
|
||
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="efuse_design_intro__table_kxg_mqy_21c" data-ofbid="efuse_design_intro__table_kxg_mqy_21c" 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">aic_sid_read</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1">函数原型</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1">int aic_sid_read(void *context, unsigned int offset, void
|
||
*data, size_t bytes)</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1">功能说明</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1">eFuse 读取接口</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1">参数定义</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1">void *contextSID(eFuse) 设备指针 offset 读取的位置偏移 void
|
||
*data 输出缓冲区 bytes 读取的数据长度</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1">返回值</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1">0: 成功其他: 失败</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0">注意事项</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0">-</td>
|
||
</tr>
|
||
</tbody></table></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="#efuse_design_intro__section_cxg_mqy_21c" data-tocid="efuse_design_intro__section_cxg_mqy_21c">模块架构</a></div></li><li class="section-item"><div class="section-title"><a href="#efuse_design_intro__section_nrh_qqy_21c" data-tocid="efuse_design_intro__section_nrh_qqy_21c">关键流程设计</a></div></li><li class="section-item"><div class="section-title"><a href="#efuse_design_intro__section_zjk_4qy_21c" data-tocid="efuse_design_intro__section_zjk_4qy_21c">数据结构设计</a></div></li><li class="section-item"><div class="section-title"><a href="#efuse_design_intro__section_fkm_nqy_21c" data-tocid="efuse_design_intro__section_fkm_nqy_21c">接口设计</a></div></li></ul></div>
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