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<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh-cn" lang="zh-cn" data-whc_version="26.0">
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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="源代码位于 drivers/mmc/host/ ： artinchip-mmc.c ，SDMC 驱动实现 artinchip-mmc.h ，SDMC 的寄存器、数据结构定义 Linux 中提供了 MMC 子系统，该子系统负责抽象一个块设备提供给通用块层使用，从整个软件的角度来看，架构如下： 图 1 . Linux MMC 子系统架构图 其中： 对用户而言，MMC card ..."/><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.contributor" content="yan.wang"/><meta name="DC.date.modified" content="2024-11-26"/><meta name="DC.format" content="HTML5"/><meta name="DC.identifier" content="sdmc_design_intro"/><meta name="DC.language" content="zh-CN"/><title>设计说明</title><!-- Build number 2023110923. --><meta name="wh-path2root" content="../../../"/><meta name="wh-toc-id" content=""/><meta name="wh-source-relpath" content="topics/sdk/sdmc/sdmc-design-guide.dita"/><meta name="wh-out-relpath" content="topics/sdk/sdmc/sdmc-design-guide.html"/>
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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/sdmc/sdmc-design-guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">设计说明</h1><div class="date inPage">26 Nov 2024</div><div style="color: gray;"></div><div class="- topic/body concept/conbody body conbody"><div class="- topic/div div">
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<p class="- topic/p p" data-ofbid="d190431e24__20250121171630">源代码位于 <span class="+ topic/ph sw-d/filepath ph filepath">drivers/mmc/host/</span>：</p>
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<ul class="- topic/ul ul" id="sdmc_design_intro__ul_sxp_lrt_c1c" data-ofbid="sdmc_design_intro__ul_sxp_lrt_c1c"><li class="- topic/li li" data-ofbid="d190431e31__20250121171630">
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<p class="- topic/p p" data-ofbid="d190431e33__20250121171630"><span class="+ topic/ph sw-d/filepath ph filepath">artinchip-mmc.c</span>，SDMC 驱动实现</p>
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</li><li class="- topic/li li" data-ofbid="d190431e38__20250121171630">
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<p class="- topic/p p" data-ofbid="d190431e40__20250121171630"><span class="+ topic/ph sw-d/filepath ph filepath">artinchip-mmc.h</span>，SDMC 的寄存器、数据结构定义</p>
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</li></ul>
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<p class="- topic/p p" data-ofbid="d190431e46__20250121171630">Linux 中提供了 MMC 子系统，该子系统负责抽象一个块设备提供给通用块层使用，从整个软件的角度来看，架构如下：</p>
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<figure class="- topic/fig fig fignone" id="sdmc_design_intro__fig_wtp_lvg_f1c" data-ofbid="sdmc_design_intro__fig_wtp_lvg_f1c"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="sdmc_design_intro__image_swm_mrt_c1c" src="../../../images/sdmc/sw_system19.png" alt="sw_system19"/></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"> 1</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">Linux MMC 子系统架构图</span></figcaption></figure>
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<p class="- topic/p p" data-ofbid="d190431e56__20250121171630">其中：</p>
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<ul class="- topic/ul ul" id="sdmc_design_intro__ol_twm_mrt_c1c" data-ofbid="sdmc_design_intro__ol_twm_mrt_c1c"><li class="- topic/li li" data-ofbid="d190431e61__20250121171630">对用户而言，MMC card 层提供了一种块设备，和其他块设备使用方法类似。</li><li class="- topic/li li" data-ofbid="d190431e63__20250121171630">MMC 子系统的核心层的功能有：<ul class="- topic/ul ul" id="sdmc_design_intro__ul_vwm_mrt_c1c" data-ofbid="sdmc_design_intro__ul_vwm_mrt_c1c"><li class="- topic/li li" data-ofbid="d190431e66__20250121171630">
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<p class="- topic/p p" data-ofbid="d190431e68__20250121171630">对上层请求的处理，其中包括将请求转化为符合 MMC 协议的逻辑实现。</p>
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</li><li class="- topic/li li" data-ofbid="d190431e71__20250121171630">
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<p class="- topic/p p" data-ofbid="d190431e73__20250121171630">对控制器驱动进行管理。</p>
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</li><li class="- topic/li li" data-ofbid="d190431e76__20250121171630">
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<p class="- topic/p p" data-ofbid="d190431e78__20250121171630">将外部 MMC 设备抽象并进行管理。</p>
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</li></ul></li><li class="- topic/li li" data-ofbid="d190431e81__20250121171630">AIC SDMC 控制器驱动：负责通过对寄存器的操作实现 MMC 子系统传来的请求。</li></ul>
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</div></div></article></main></div>
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<p class="p1">Copyright © 2019-2024 广东匠芯创科技有限公司. All rights reserved.</p>
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Update Time: 2025-01-21
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