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<a href="https://gitlab.rtems.org/yangn0">Ning Yang</a>
<a href="https://gitlab.rtems.org/groups/rtems/-/epics/6#note_110643">commented</a>:
</p>
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<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">Coding Period Week #13</p>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">Planned:</p>
<ul dir="auto" style="text-align: initial; list-style-type: disc; margin: 0 0 16px; padding: 0;">
<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">SD R/W access support.
<ul style="list-style-type: circle; margin: 0; padding: 0;">
<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">mailbox driver</li>
</ul>
</li>
</ul>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">Completed:</p>
<ol dir="auto" style="text-align: initial; margin: 0 0 16px; padding: 0;">
<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Merged SPI MR. !103</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Improved Watchdog MR. <a href="https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/120" data-reference-type="merge_request" data-original="rtems/rtos/rtems!120" data-link="false" data-link-reference="false" data-merge-request="239" data-project="26" data-project-path="rtems/rtos/rtems" data-iid="120" data-container="body" data-placement="top" title="aarch64/raspberrypi: Add Watchdog Timer driver" class="gfm gfm-merge_request" style="margin-top: 0;">rtems/rtos/rtems!120</a>
</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Read freebsd-org/sys/arm/broadcom/bcm2835/bcm2835_sdhci.c.</li>
</ol>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">Blockers/Problems:</p>
<ol dir="auto" style="text-align: initial; margin: 0 0 16px; padding: 0;">
<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Barusu's mailbox driver is missing some implementations. I want to complete them after porting the SDHCI driver.
In bcm2835_sdhci.c file, there are only two functions to communicate with mailbox:</li>
</ol>
<div class="gl-relative markdown-code-block js-markdown-code">
<pre data-canonical-lang="c" class="code highlight js-syntax-highlight language-c" v-pre="true" style='display: block; font-size: 14px; color: #333238; line-height: 1.6em; overflow-x: auto; border-radius: .25rem; position: relative; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 16px; padding: 12px; border: 1px solid #dcdcde;'><code style='font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; background-color: inherit; border-radius: .25rem; white-space: pre; margin-top: 0; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; overflow-wrap: normal; padding: unset;'><span id="LC1" class="line" lang="c" style="margin-top: 0;"><span class="n" style="margin-top: 0;">bcm2835_mbox_set_power_state</span><span class="p">(</span><span class="n">BCM2835_MBOX_POWER_ID_EMMC</span><span class="p">,</span><span class="n">TRUE</span><span class="p">);</span></span>
<span id="LC2" class="line" lang="c"><span class="n" style="margin-top: 0;">bcm2835_mbox_get_clock_rate</span><span class="p">(</span><span class="n">BCM2835_MBOX_CLOCK_ID_EMMC</span><span class="p">,</span><span class="o">&</span><span class="n">default_freq</span><span class="p">);</span></span></code></pre>
<copy-code></copy-code>
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<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">There can be some alternatives</p>
<ul dir="auto" style="text-align: initial; list-style-type: disc; margin: 0 0 16px; padding: 0;">
<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">
<code style='font-size: 90%; color: #1f1e24; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; margin-top: 0; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>bcm2835_mbox_set_power_state</code>: I can use a temporary function to communicate with the mailbox to set power state.</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">
<code style='font-size: 90%; color: #1f1e24; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; margin-top: 0; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; vertical-align: bottom; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>bcm2835_mbox_get_clock_rate</code>: I can get the clock rate from the spec file.</li>
</ul>
<ol start="2" dir="auto" style="text-align: initial; margin: 0 0 16px; padding: 0;">
<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">sdhci uses dma mode for transmission. I need to complete the DMA driver first.</li>
</ol>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">Next week plans:</p>
<ol dir="auto" style="text-align: initial; margin: 0; padding: 0;">
<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">DMA driver</li>
</ol>
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