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<font color="#FFFFFF" size="5" face="Arial, Helvetica, sans-serif"><strong>Embedded SDIO Driver Kit Help </strong></font></td>
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<p class="BODYTEXT"> <strong>General Topics:</strong>
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<td><a href="#console">How do I redirect debug prints to a serial
port console on Linux?</a></td>
</tr>
<tr>
<td><a href="#debuglevel">What debug prints does the SDIO core/busdriver output, and
how do I set the debug level under Linux?</a></td></tr>
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<td><a href="#pnpKconfig">The busdriver does not load because of the missing export : pnp_register_protocol.</a> </td>
</tr>
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<td><a href="#faq1">Does the stack support multi-slot hosts where each slot operates in a bussed configuration? </a> </td>
</tr>
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<td><a href="#faq2">
Concerning my SOCKET Bluetooth card, how do I go about testing this Bluetooth CARD ? </a> </td>
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<td><a href="#faq3">ques3</a> </td>
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<p class="HEADING3"><strong><a name="console"></a>How do I redirect debug prints to a serial
port console on Linux?</strong></p>
<p class="BODYTEXT">For a standard PC platform, you can set up a default console
for the serial port using the kernel boot arguments: "console=ttyS0,115200n8".
On most PCs ttyS0 is assigned to COM1 and ttyS1 is COM2. The syslog daemon
may also output duplicate debug messages to the console as the kernel also
buffers messages to a RAM buffer. To stop syslog from logging these extraneous
messages,
edit <font face="Courier New, Courier, mono">/etc/syslog.conf</font> and
comment
out
any entries that direct kernel messages (<font face="Courier New, Courier, mono">kern.*</font>) to<font face="Courier New, Courier, mono"> /dev/console</font>.</p>
<blockquote>
<a href="#BackToTop">Back
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<p class="HEADING3"><strong><a name="debuglevel"></a>What debug prints does the SDIO core/busdriver output, and
how do I set the debug level under Linux?</strong></p>
<p class="BODYTEXT">The SDIO bus driver outputs errors and warnings by default.
Additional debug messages can be enabled by changing the default debug level.
The higher the debug level, the more verbose the outputs. The following debug
levels are used in the bus driver:
<p class="BODYTEXT">
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<td><strong>Level</strong></td>
<td><strong>Description</strong></td>
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<td>3</td>
<td>Errors</td>
</tr>
<tr>
<td>4</td>
<td>Warnings</td>
</tr>
<tr>
<td>7</td>
<td>Stack startup/shutdown, function enumeration.</td>
</tr>
<tr>
<td>8</td>
<td>Function SDIO IRQ processing</td>
</tr>
<tr>
<td>9</td>
<td>SDIO Bus Requests</td>
</tr>
<tr>
<td>10</td>
<td>Card detect timer (for HCs that use polling)</td>
</tr>
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<td>11</td>
<td>Host controller events</td>
</tr>
</table>
<p class="BODYTEXT"><br>
<br>
To set the debug level of the SDIO bus
driver, add the following parameter on
the <font face="Courier New, Courier, mono">insmod</font> command
line
after
the
name of the bus driver (<font face="Courier New, Courier, mono">sdio_busdriver.ko</font>):<br/>
<font face="Courier New, Courier, mono">debuglevel=x , </font>where 'x' is
the debug
level number.
<p class="BODYTEXT">For example: <font face="Courier New, Courier, mono">insmod -f sdio_busdriver.lo debuglevel=7</font>
<blockquote>
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<p class="HEADING3"><strong><a name="pnpKconfig"></a>The busdriver does not load because of the missing export : pnp_register_protocol.</strong></p>
<p class="BODYTEXT">For linux kernels 2.6 or higher the SDIO bus driver uses
the PnP subsystem to register device instances. In order to enable
the PnP subsystem on non-x86 platforms, you must modify the <font face="Courier New, Courier, mono">Kconfig</font> file
located in <font face="Courier New, Courier, mono">/drivers/pnp</font>.
Comment
out the line: "<font face="Courier New, Courier, mono"> depends on ISA</font>".
You will then need to run "<font face="Courier New, Courier, mono">make
menuconfig</font>"
and select "<font face="Courier New, Courier, mono">Plug and Play Support</font>".
You do not need to enable "<font face="Courier New, Courier, mono">ISA
Plug and Play</font>" or "<font face="Courier New, Courier, mono">PnP
Debug Messages</font>".</p>
<blockquote>
<a href="#BackToTop">Back
to top.</a></p>
</blockquote>
<p class="HEADING3"><strong><a name="faq1"></a>Does the stack support multi-slot hosts where each slot operates in a bussed configuration?</strong></p>
<p class="BODYTEXT">The stack supports a multi-slot host with independent SDIO
buses. It does not support a controller that uses slots in a bussed configuration
(shared CMD, DAT, CLK lines).
Sharing a common clock is not a good design as some SD cards have different clocking
requirements. Although you can usually switch the clock to the correct bus
rates on EVERY transaction
there might be issues when you have a 4-bit SDIO card that needs the clock "always" on
in order for SDIO interrupts to operate. There also electrical issues with
live removal/insertion of cards.</p>
<blockquote>
<a href="#BackToTop">Back
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</blockquote>
<p class="HEADING3"><strong><a name="faq2"></a>
Concerning my SOCKET Bluetooth card, how do I go about testing this Bluetooth CARD? </strong></p>
<p class="BODYTEXT">The bluetooth card requires that your kernel configuration includes bluetooth support. This will build the HCI and L2CAP
layers into the kernel. To fully use the Bluetooth card you should setup the BlueZ stack tools for configuration and connection tasks.
These are user mode tools that can be scripted or executed from a console.
Here is a link to the stack: (http://www.bluez.org/). </p>
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