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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="以下接口皆为 MMC 子系统所需要的标准接口，通过 mmc_host_ops 注册到 MMC 子系统。 static const struct mmc_host_ops artinchip_mmc_ops = { .request = artinchip_mmc_request, .pre_req = artinchip_mmc_pre_req, .post_req = ..."/><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="2024-07-15"/><meta name="DC.format" content="HTML5"/><meta name="DC.identifier" content="sdmc_interface_design"/><meta name="DC.language" content="zh-CN"/><title>接口设计</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-interface_design.dita"/><meta name="wh-out-relpath" content="topics/sdk/sdmc/sdmc-interface_design.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-interface_design.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">接口设计</h1><div class="date inPage">15 Jul 2024</div><div style="color: gray;">
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Read time: 2 minute(s)
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</div><div class="- topic/body concept/conbody body conbody"><div class="- topic/p p" data-ofbid="d328809e22__20250121171831">以下接口皆为 MMC 子系统所需要的标准接口，通过 mmc_host_ops 注册到 MMC
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子系统。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="sdmc_interface_design__codeblock_rr5_2tt_c1c" data-ofbid="sdmc_interface_design__codeblock_rr5_2tt_c1c"><strong class="hl-keyword">static</strong> <strong class="hl-keyword">const</strong> <strong class="hl-keyword">struct</strong> mmc_host_ops artinchip_mmc_ops = {
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.request = artinchip_mmc_request,
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.pre_req = artinchip_mmc_pre_req,
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.post_req = artinchip_mmc_post_req,
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.set_ios = artinchip_mmc_set_ios,
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.get_ro = artinchip_mmc_get_ro,
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.get_cd = artinchip_mmc_get_cd,
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.hw_reset = artinchip_mmc_hw_reset,
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.enable_sdio_irq = artinchip_mmc_enable_sdio_irq,
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.ack_sdio_irq = artinchip_mmc_ack_sdio_irq,
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.execute_tuning = artinchip_mmc_execute_tuning,
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.card_busy = artinchip_mmc_card_busy,
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.start_signal_voltage_switch = artinchip_mmc_switch_voltage,
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.init_card = artinchip_mmc_init_card,
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};</pre></div><div class="table-container"><table class="- topic/table table frame-all" id="sdmc_interface_design__table_u3w_ftt_c1c" data-ofbid="sdmc_interface_design__table_u3w_ftt_c1c" 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">artinchip_mmc_request</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_interface_design__table_u3w_ftt_c1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="sdmc_interface_design__table_u3w_ftt_c1c__entry__2">static void artinchip_mmc_request(struct mmc_host *mmc, struct
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mmc_request *mrq)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_u3w_ftt_c1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_u3w_ftt_c1c__entry__2">读取当前的 RTC 时间</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_u3w_ftt_c1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_u3w_ftt_c1c__entry__2">操作寄存器实现 request</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_u3w_ftt_c1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_u3w_ftt_c1c__entry__2">
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<ul class="- topic/ul ul" id="sdmc_interface_design__ul_khk_jtj_bcc" data-ofbid="sdmc_interface_design__ul_khk_jtj_bcc"><li class="- topic/li li" data-ofbid="d328809e55__20250121171831">mmc：MMC 设备指针 </li><li class="- topic/li li" data-ofbid="d328809e57__20250121171831">mrq：请求的参数和资源</li></ul>
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</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_u3w_ftt_c1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_u3w_ftt_c1c__entry__2">-</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_interface_design__table_u3w_ftt_c1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="sdmc_interface_design__table_u3w_ftt_c1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="sdmc_interface_design__table_v3w_ftt_c1c" data-ofbid="sdmc_interface_design__table_v3w_ftt_c1c" 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">artinchip_mmc_pre_req</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_interface_design__table_v3w_ftt_c1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="sdmc_interface_design__table_v3w_ftt_c1c__entry__2">static void artinchip_mmc_pre_req(struct mmc_host *mmc, struct
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mmc_request *mrq)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_v3w_ftt_c1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_v3w_ftt_c1c__entry__2">准备下一个 request</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_v3w_ftt_c1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_v3w_ftt_c1c__entry__2">
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<ul class="- topic/ul ul" id="sdmc_interface_design__ul_b3f_ktj_bcc" data-ofbid="sdmc_interface_design__ul_b3f_ktj_bcc"><li class="- topic/li li" data-ofbid="d328809e94__20250121171831">mmc：MMC 设备指针 </li><li class="- topic/li li" data-ofbid="d328809e96__20250121171831">mrq：请求的参数和资源</li></ul>
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</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_v3w_ftt_c1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_v3w_ftt_c1c__entry__2">-</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_interface_design__table_v3w_ftt_c1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="sdmc_interface_design__table_v3w_ftt_c1c__entry__2">在准备下一个请求前，一般需要调用 artinchip_mmc_post_request</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="sdmc_interface_design__table_w3w_ftt_c1c" data-ofbid="sdmc_interface_design__table_w3w_ftt_c1c" 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"> 3</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">artinchip_mmc_post_req</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_interface_design__table_w3w_ftt_c1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="sdmc_interface_design__table_w3w_ftt_c1c__entry__2">static void artinchip_mmc_post_req(struct mmc_host *mmc, struct
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mmc_request *mrq, int err)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_w3w_ftt_c1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_w3w_ftt_c1c__entry__2">送出一个 request</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_w3w_ftt_c1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_w3w_ftt_c1c__entry__2">
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<ul class="- topic/ul ul" id="sdmc_interface_design__ul_yqk_ktj_bcc" data-ofbid="sdmc_interface_design__ul_yqk_ktj_bcc"><li class="- topic/li li" data-ofbid="d328809e133__20250121171831">mmc：MMC 设备指针 </li><li class="- topic/li li" data-ofbid="d328809e135__20250121171831">mrq：请求的参数和资源</li><li class="- topic/li li" data-ofbid="d328809e137__20250121171831">err：如果非零，需要清理掉 pre_req() 中申请的资源</li></ul>
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</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_w3w_ftt_c1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_w3w_ftt_c1c__entry__2">-</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_interface_design__table_w3w_ftt_c1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="sdmc_interface_design__table_w3w_ftt_c1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="sdmc_interface_design__table_x3w_ftt_c1c" data-ofbid="sdmc_interface_design__table_x3w_ftt_c1c" 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"> 4</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">artinchip_mmc_set_ios</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_interface_design__table_x3w_ftt_c1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="sdmc_interface_design__table_x3w_ftt_c1c__entry__2">static void artinchip_mmc_set_ios(struct mmc_host *mmc, struct
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mmc_ios *ios)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_x3w_ftt_c1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_x3w_ftt_c1c__entry__2">对设备的位宽、DDR 模式、clock、power 模式等进行配置</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_x3w_ftt_c1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_x3w_ftt_c1c__entry__2">
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<ul class="- topic/ul ul" id="sdmc_interface_design__ul_jln_ltj_bcc" data-ofbid="sdmc_interface_design__ul_jln_ltj_bcc"><li class="- topic/li li" data-ofbid="d328809e174__20250121171831">mmc：MMC 设备指针 </li><li class="- topic/li li" data-ofbid="d328809e176__20250121171831">ios：配置参数</li></ul>
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</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_x3w_ftt_c1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_x3w_ftt_c1c__entry__2">-</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_interface_design__table_x3w_ftt_c1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="sdmc_interface_design__table_x3w_ftt_c1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="sdmc_interface_design__table_y3w_ftt_c1c" data-ofbid="sdmc_interface_design__table_y3w_ftt_c1c" 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"> 5</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">artinchip_mmc_get_cd</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_interface_design__table_y3w_ftt_c1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="sdmc_interface_design__table_y3w_ftt_c1c__entry__2">static int artinchip_mmc_get_cd(struct mmc_host *mmc)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_y3w_ftt_c1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_y3w_ftt_c1c__entry__2">探测外部 SD 设备</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_y3w_ftt_c1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_y3w_ftt_c1c__entry__2">mmc：MMC 设备指针</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_y3w_ftt_c1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_y3w_ftt_c1c__entry__2">执行成功则返回 1</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_interface_design__table_y3w_ftt_c1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="sdmc_interface_design__table_y3w_ftt_c1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="sdmc_interface_design__table_z3w_ftt_c1c" data-ofbid="sdmc_interface_design__table_z3w_ftt_c1c" 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"> 6</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">artinchip_mmc_hw_reset</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_interface_design__table_z3w_ftt_c1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="sdmc_interface_design__table_z3w_ftt_c1c__entry__2">static void artinchip_mmc_hw_reset(struct mmc_host *mmc)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_z3w_ftt_c1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_z3w_ftt_c1c__entry__2">对 MMC 控制器、DMA 等进行一次 reset</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_z3w_ftt_c1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_z3w_ftt_c1c__entry__2">mmc：MMC 设备指针</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_z3w_ftt_c1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_z3w_ftt_c1c__entry__2">-</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_interface_design__table_z3w_ftt_c1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="sdmc_interface_design__table_z3w_ftt_c1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="sdmc_interface_design__table_ajw_ftt_c1c" data-ofbid="sdmc_interface_design__table_ajw_ftt_c1c" 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"> 7</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">artinchip_mmc_enable_sdio_irq</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_interface_design__table_ajw_ftt_c1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="sdmc_interface_design__table_ajw_ftt_c1c__entry__2">static void artinchip_mmc_enable_sdio_irq(struct mmc_host *mmc,
|
||
int enb)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_ajw_ftt_c1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_ajw_ftt_c1c__entry__2">使能或者关闭 MMC 控制器的中断</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_ajw_ftt_c1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_ajw_ftt_c1c__entry__2">
|
||
<ul class="- topic/ul ul" id="sdmc_interface_design__ul_hm2_ptj_bcc" data-ofbid="sdmc_interface_design__ul_hm2_ptj_bcc"><li class="- topic/li li" data-ofbid="d328809e279__20250121171831">mmc：MMC 设备指针 </li><li class="- topic/li li" data-ofbid="d328809e281__20250121171831">enb：使能开关</li></ul>
|
||
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_ajw_ftt_c1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_ajw_ftt_c1c__entry__2">-</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_interface_design__table_ajw_ftt_c1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="sdmc_interface_design__table_ajw_ftt_c1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="sdmc_interface_design__table_bjw_ftt_c1c" data-ofbid="sdmc_interface_design__table_bjw_ftt_c1c" 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"> 8</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">artinchip_mmc_ack_sdio_irq</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_interface_design__table_bjw_ftt_c1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="sdmc_interface_design__table_bjw_ftt_c1c__entry__2">static void artinchip_mmc_ack_sdio_irq(struct mmc_host
|
||
*mmc)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_bjw_ftt_c1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_bjw_ftt_c1c__entry__2">打开 MMC 控制器的中断</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_bjw_ftt_c1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_bjw_ftt_c1c__entry__2">mmc：MMC 设备指针</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_bjw_ftt_c1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_bjw_ftt_c1c__entry__2">-</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_interface_design__table_bjw_ftt_c1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="sdmc_interface_design__table_bjw_ftt_c1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="sdmc_interface_design__table_cjw_ftt_c1c" data-ofbid="sdmc_interface_design__table_cjw_ftt_c1c" 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"> 9</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">artinchip_mmc_execute_tuning</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_interface_design__table_cjw_ftt_c1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="sdmc_interface_design__table_cjw_ftt_c1c__entry__2">static int artinchip_mmc_execute_tuning(struct mmc_host *mmc, u32
|
||
opcode)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_cjw_ftt_c1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_cjw_ftt_c1c__entry__2">MMC 的 tuning 功能接口</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_cjw_ftt_c1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_cjw_ftt_c1c__entry__2">
|
||
<ul class="- topic/ul ul" id="sdmc_interface_design__ul_mhp_4tj_bcc" data-ofbid="sdmc_interface_design__ul_mhp_4tj_bcc"><li class="- topic/li li" data-ofbid="d328809e351__20250121171831">mmc：MMC 设备指针 </li><li class="- topic/li li" data-ofbid="d328809e353__20250121171831">opcode：tuning 命令码</li></ul>
|
||
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_cjw_ftt_c1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_cjw_ftt_c1c__entry__2">-</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_interface_design__table_cjw_ftt_c1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="sdmc_interface_design__table_cjw_ftt_c1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="sdmc_interface_design__table_djw_ftt_c1c" data-ofbid="sdmc_interface_design__table_djw_ftt_c1c" 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"> 10</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">artinchip_mmc_card_busy</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_interface_design__table_djw_ftt_c1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="sdmc_interface_design__table_djw_ftt_c1c__entry__2">static int artinchip_mmc_card_busy(struct mmc_host *mmc)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_djw_ftt_c1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_djw_ftt_c1c__entry__2">查看 MMC 设备是否处于 Busy 状态</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_djw_ftt_c1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_djw_ftt_c1c__entry__2">mmc：MMC 设备指针</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_djw_ftt_c1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_djw_ftt_c1c__entry__2">若处于 idle 状态返回 0，busy 则返回 1</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_interface_design__table_djw_ftt_c1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="sdmc_interface_design__table_djw_ftt_c1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="sdmc_interface_design__table_ejw_ftt_c1c" data-ofbid="sdmc_interface_design__table_ejw_ftt_c1c" 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"> 11</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">artinchip_mmc_switch_voltage</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_interface_design__table_ejw_ftt_c1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="sdmc_interface_design__table_ejw_ftt_c1c__entry__2">static int artinchip_mmc_switch_voltage(struct mmc_host *mmc,
|
||
struct mmc_ios *ios)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_ejw_ftt_c1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_ejw_ftt_c1c__entry__2">设置 MMC 设备的工作电压</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_ejw_ftt_c1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_ejw_ftt_c1c__entry__2">
|
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<ul class="- topic/ul ul" id="sdmc_interface_design__ul_fkn_ntj_bcc" data-ofbid="sdmc_interface_design__ul_fkn_ntj_bcc"><li class="- topic/li li" data-ofbid="d328809e424__20250121171831">mmc：MMC 设备指针 </li><li class="- topic/li li" data-ofbid="d328809e426__20250121171831">ios：设置参数</li></ul>
|
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</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_ejw_ftt_c1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_ejw_ftt_c1c__entry__2">0，成功。 < 0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_interface_design__table_ejw_ftt_c1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="sdmc_interface_design__table_ejw_ftt_c1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="sdmc_interface_design__table_fjw_ftt_c1c" data-ofbid="sdmc_interface_design__table_fjw_ftt_c1c" 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"> 12</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">artinchip_mmc_init_card</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="sdmc_interface_design__table_fjw_ftt_c1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="sdmc_interface_design__table_fjw_ftt_c1c__entry__2">static void artinchip_mmc_init_card(struct mmc_host *mmc, struct
|
||
mmc_card *card)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_fjw_ftt_c1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_fjw_ftt_c1c__entry__2">初始化外部 mmc 设备</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_fjw_ftt_c1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_fjw_ftt_c1c__entry__2">
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<ul class="- topic/ul ul" id="sdmc_interface_design__ul_hmy_mtj_bcc" data-ofbid="sdmc_interface_design__ul_hmy_mtj_bcc"><li class="- topic/li li" data-ofbid="d328809e463__20250121171831">mmc：MMC 设备指针 </li><li class="- topic/li li" data-ofbid="d328809e465__20250121171831">card：card 设备指针</li></ul>
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</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="sdmc_interface_design__table_fjw_ftt_c1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="sdmc_interface_design__table_fjw_ftt_c1c__entry__2">-</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="sdmc_interface_design__table_fjw_ftt_c1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="sdmc_interface_design__table_fjw_ftt_c1c__entry__2">-</td></tr></tbody></table></div></div></article></main></div>
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