1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>Driver with A Single Source File</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Writing an ALSA Driver"><link rel="up" href="how-to-put-your-driver.html" title="Chapter 15. How To Put Your Driver Into ALSA Tree"><link rel="prev" href="how-to-put-your-driver.html" title="Chapter 15. How To Put Your Driver Into ALSA Tree"><link rel="next" href="ch15s03.html" title="Drivers with Several Source Files"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Driver with A Single Source File</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="how-to-put-your-driver.html">Prev</a> </td><th width="60%" align="center">Chapter 15. How To Put Your Driver Into ALSA Tree</th><td width="20%" align="right"> <a accesskey="n" href="ch15s03.html">Next</a></td></tr></table><hr></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="idp1094434828"></a>Driver with A Single Source File</h2></div></div></div><p> 2 </p><div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"><p> 3 Modify alsa-driver/pci/Makefile 4 </p><p> 5 Suppose you have a file xyz.c. Add the following 6 two lines 7 </p><div class="informalexample"><pre class="programlisting"> 8 9 snd-xyz-objs := xyz.o 10 obj-$(CONFIG_SND_XYZ) += snd-xyz.o 11 12 </pre></div><p> 13 </p></li><li class="listitem"><p> 14 Create the Kconfig entry 15 </p><p> 16 Add the new entry of Kconfig for your xyz driver. 17 </p><div class="informalexample"><pre class="programlisting"> 18 19 config SND_XYZ 20 tristate "Foobar XYZ" 21 depends on SND 22 select SND_PCM 23 help 24 Say Y here to include support for Foobar XYZ soundcard. 25 26 To compile this driver as a module, choose M here: the module 27 will be called snd-xyz. 28 29 </pre></div><p> 30 31 the line, select SND_PCM, specifies that the driver xyz supports 32 PCM. In addition to SND_PCM, the following components are 33 supported for select command: 34 SND_RAWMIDI, SND_TIMER, SND_HWDEP, SND_MPU401_UART, 35 SND_OPL3_LIB, SND_OPL4_LIB, SND_VX_LIB, SND_AC97_CODEC. 36 Add the select command for each supported component. 37 </p><p> 38 Note that some selections imply the lowlevel selections. 39 For example, PCM includes TIMER, MPU401_UART includes RAWMIDI, 40 AC97_CODEC includes PCM, and OPL3_LIB includes HWDEP. 41 You don't need to give the lowlevel selections again. 42 </p><p> 43 For the details of Kconfig script, refer to the kbuild 44 documentation. 45 </p></li><li class="listitem"><p> 46 Run cvscompile script to re-generate the configure script and 47 build the whole stuff again. 48 </p></li></ol></div><p> 49 </p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="how-to-put-your-driver.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="how-to-put-your-driver.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ch15s03.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 15. How To Put Your Driver Into ALSA Tree </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Drivers with Several Source Files</td></tr></table></div></body></html> 50