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<a class="el" href="dir_897b6a2d7bab147dd1db58381aad3984.html">src</a> » <a class="el" href="dir_832905b1f7f5feaf61a306b40c0ac817.html">sys</a> » <a class="el" href="dir_7b0469299ccbf4a3a403496996173710.html">sys</a></div>
<h1>device.c</h1><a href="device_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*****************************************************************************************</span>
<a name="l00002"></a>00002 <span class="comment"> Copyright (c) 2002-2005 The UbixOS Project</span>
<a name="l00003"></a>00003 <span class="comment"> All rights reserved.</span>
<a name="l00004"></a>00004 <span class="comment"></span>
<a name="l00005"></a>00005 <span class="comment"> Redistribution and use in source and binary forms, with or without modification, are</span>
<a name="l00006"></a>00006 <span class="comment"> permitted provided that the following conditions are met:</span>
<a name="l00007"></a>00007 <span class="comment"></span>
<a name="l00008"></a>00008 <span class="comment"> Redistributions of source code must retain the above copyright notice, this list of</span>
<a name="l00009"></a>00009 <span class="comment"> conditions, the following disclaimer and the list of authors. Redistributions in binary</span>
<a name="l00010"></a>00010 <span class="comment"> form must reproduce the above copyright notice, this list of conditions, the following</span>
<a name="l00011"></a>00011 <span class="comment"> disclaimer and the list of authors in the documentation and/or other materials provided</span>
<a name="l00012"></a>00012 <span class="comment"> with the distribution. Neither the name of the UbixOS Project nor the names of its</span>
<a name="l00013"></a>00013 <span class="comment"> contributors may be used to endorse or promote products derived from this software</span>
<a name="l00014"></a>00014 <span class="comment"> without specific prior written permission.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment"> THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY</span>
<a name="l00017"></a>00017 <span class="comment"> EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF</span>
<a name="l00018"></a>00018 <span class="comment"> MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL</span>
<a name="l00019"></a>00019 <span class="comment"> THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span>
<a name="l00020"></a>00020 <span class="comment"> SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT</span>
<a name="l00021"></a>00021 <span class="comment"> OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)</span>
<a name="l00022"></a>00022 <span class="comment"> HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR</span>
<a name="l00023"></a>00023 <span class="comment"> TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS</span>
<a name="l00024"></a>00024 <span class="comment"> SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00025"></a>00025 <span class="comment"></span>
<a name="l00026"></a>00026 <span class="comment"> $Id: device_8c-source.html 88 2016-01-12 00:11:29Z reddawg $</span>
<a name="l00027"></a>00027 <span class="comment"></span>
<a name="l00028"></a>00028 <span class="comment">*****************************************************************************************/</span>
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <span class="preprocessor">#include <<a class="code" href="device_8h.html">sys/device.h</a>></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <<a class="code" href="spinlock_8h.html">ubixos/spinlock.h</a>></span>
<a name="l00032"></a>00032 <span class="preprocessor">#include <<a class="code" href="kmalloc_8h.html">lib/kmalloc.h</a>></span>
<a name="l00033"></a>00033 <span class="preprocessor">#include <<a class="code" href="kprintf_8h.html">lib/kprintf.h</a>></span>
<a name="l00034"></a>00034 <span class="preprocessor">#include <<a class="code" href="assert_8h.html">assert.h</a>></span>
<a name="l00035"></a>00035
<a name="l00036"></a>00036 <span class="comment">/* Linked list of drivers loaded in the system accessable by the subsystem only */</span>
<a name="l00037"></a><a class="code" href="device_8c.html#90d9a2a00434982169ff5710b19a4c1c">00037</a> <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="structdevice__node.html">device_node</a> *<a class="code" href="device_8c.html#90d9a2a00434982169ff5710b19a4c1c">devices</a> = 0x0;
<a name="l00038"></a><a class="code" href="device_8c.html#9c7fbb38f0fb266ba997f51da7cf8a50">00038</a> <span class="keyword">static</span> <a class="code" href="spinlock_8h.html#a240e9404b4ede1e0d714610080d1176">spinLock_t</a> <a class="code" href="device_8c.html#9c7fbb38f0fb266ba997f51da7cf8a50">deviceSpinLock</a> = <a class="code" href="spinlock_8h.html#0fe85a4f3642683148b25916d6c5eafd">SPIN_LOCK_INITIALIZER</a>;
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="comment">/*****************************************************************************************</span>
<a name="l00041"></a>00041 <span class="comment"></span>
<a name="l00042"></a>00042 <span class="comment"> Function: int deviceAdd(int minor,char type,struct device_interface *devInfo);</span>
<a name="l00043"></a>00043 <span class="comment"></span>
<a name="l00044"></a>00044 <span class="comment"> Description: This will add a device to the system</span>
<a name="l00045"></a>00045 <span class="comment"></span>
<a name="l00046"></a>00046 <span class="comment"> Notes: </span>
<a name="l00047"></a>00047 <span class="comment"></span>
<a name="l00048"></a>00048 <span class="comment"> 05/19/2004 - Improving Upon the spec</span>
<a name="l00049"></a>00049 <span class="comment"></span>
<a name="l00050"></a>00050 <span class="comment">*****************************************************************************************/</span>
<a name="l00051"></a><a class="code" href="device_8c.html#24bac04b529afec40daa960bd7e7b8ee">00051</a> <span class="keywordtype">int</span> <a class="code" href="device_8h.html#256b750ab99e3be9b83a9bfd37a22388">device_add</a>(<span class="keywordtype">int</span> <a class="code" href="structdevice__node.html#3817327901b55e2ca15b2e4dfa20789f">minor</a>,<span class="keywordtype">char</span> <a class="code" href="structdevice__node.html#431c348cd0c27dceca9b3cd14ec6659d">type</a>,<span class="keyword">struct</span> <a class="code" href="structdevice__interface.html">device_interface</a> *<a class="code" href="structdevice__node.html#588d09d5dabf1c8866d359aaac799b1c">devInfo</a>) {
<a name="l00052"></a>00052 <span class="keyword">struct </span><a class="code" href="structdevice__node.html">device_node</a> *tmpDev = 0x0;
<a name="l00053"></a>00053
<a name="l00054"></a>00054
<a name="l00055"></a>00055 tmpDev = (<span class="keyword">struct </span><a class="code" href="structdevice__node.html">device_node</a> *)<a class="code" href="kmalloc_8h.html#150eab2ac4ce4553e21ca10e7f441762">kmalloc</a>(<span class="keyword">sizeof</span>(<span class="keyword">struct</span> <a class="code" href="structdevice__node.html">device_node</a>));
<a name="l00056"></a>00056 <span class="keywordflow">if</span>(tmpDev == <a class="code" href="types_8h.html#070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00057"></a>00057 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"Error Adding Device: memory failure\n"</span>);
<a name="l00058"></a>00058
<a name="l00059"></a>00059 tmpDev-><a class="code" href="structdevice__node.html#7ec9182b21c0911760a148ac77a7e2a2">prev</a> = 0x0;
<a name="l00060"></a>00060 tmpDev-><a class="code" href="structdevice__node.html#3817327901b55e2ca15b2e4dfa20789f">minor</a> = minor;
<a name="l00061"></a>00061 tmpDev-><a class="code" href="structdevice__node.html#431c348cd0c27dceca9b3cd14ec6659d">type</a> = type;
<a name="l00062"></a>00062 tmpDev-><a class="code" href="structdevice__node.html#588d09d5dabf1c8866d359aaac799b1c">devInfo</a> = <a class="code" href="structdevice__node.html#588d09d5dabf1c8866d359aaac799b1c">devInfo</a>;
<a name="l00063"></a>00063
<a name="l00064"></a>00064 <a class="code" href="spinlock_8h.html#2cd9a4502680fb8e7f0fe6b029e558b1">spinLock</a>(&<a class="code" href="device_8c.html#9c7fbb38f0fb266ba997f51da7cf8a50">deviceSpinLock</a>);
<a name="l00065"></a>00065 tmpDev-><a class="code" href="structdevice__node.html#747f88b0cd43b7b710d8fb86ea50fbaf">next</a> = <a class="code" href="device_8c.html#90d9a2a00434982169ff5710b19a4c1c">devices</a>;
<a name="l00066"></a>00066 <a class="code" href="device_8c.html#90d9a2a00434982169ff5710b19a4c1c">devices</a> = tmpDev;
<a name="l00067"></a>00067 <a class="code" href="spinlock_8h.html#dd996cbbb3b9826dd9c8cf02b66a4c65">spinUnlock</a>(&<a class="code" href="device_8c.html#9c7fbb38f0fb266ba997f51da7cf8a50">deviceSpinLock</a>);
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="keywordflow">if</span> (tmpDev-><a class="code" href="structdevice__node.html#588d09d5dabf1c8866d359aaac799b1c">devInfo</a>-><a class="code" href="structdevice__interface.html#561678212ee39a09ce43c1a3567c64e2">initialized</a> == 0x0)
<a name="l00070"></a>00070 <span class="keywordflow">return</span>(tmpDev-><a class="code" href="structdevice__node.html#588d09d5dabf1c8866d359aaac799b1c">devInfo</a>-><a class="code" href="structdevice__interface.html#92620413c2580ea3cf01e121bb54c254">init</a>(tmpDev));
<a name="l00071"></a>00071 <span class="keywordflow">else</span>
<a name="l00072"></a>00072 <span class="keywordflow">return</span>(0x0);
<a name="l00073"></a>00073 }
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <span class="comment">/*****************************************************************************************</span>
<a name="l00076"></a>00076 <span class="comment"></span>
<a name="l00077"></a>00077 <span class="comment"> Function: struct device_node *deviceFind(int major,int minor);</span>
<a name="l00078"></a>00078 <span class="comment"></span>
<a name="l00079"></a>00079 <span class="comment"> Description: This will find a device based on major minor</span>
<a name="l00080"></a>00080 <span class="comment"></span>
<a name="l00081"></a>00081 <span class="comment"> Notes: </span>
<a name="l00082"></a>00082 <span class="comment"></span>
<a name="l00083"></a>00083 <span class="comment"> 05/19/2004 - Improving Upon the spec</span>
<a name="l00084"></a>00084 <span class="comment"></span>
<a name="l00085"></a>00085 <span class="comment">*****************************************************************************************/</span>
<a name="l00086"></a><a class="code" href="device_8c.html#0002a4ec01ee11597c6751602f3e4c3d">00086</a> <span class="keyword">struct </span><a class="code" href="structdevice__node.html">device_node</a> *<a class="code" href="device_8h.html#0002a4ec01ee11597c6751602f3e4c3d">device_find</a>(<span class="keywordtype">int</span> major,<span class="keywordtype">int</span> <a class="code" href="structdevice__node.html#3817327901b55e2ca15b2e4dfa20789f">minor</a>) {
<a name="l00087"></a>00087 <span class="keyword">struct </span><a class="code" href="structdevice__node.html">device_node</a> *tmpDev = 0x0;
<a name="l00088"></a>00088
<a name="l00089"></a>00089 <a class="code" href="spinlock_8h.html#2cd9a4502680fb8e7f0fe6b029e558b1">spinLock</a>(&<a class="code" href="device_8c.html#9c7fbb38f0fb266ba997f51da7cf8a50">deviceSpinLock</a>);
<a name="l00090"></a>00090
<a name="l00091"></a>00091 <span class="keywordflow">for</span> (tmpDev = <a class="code" href="device_8c.html#90d9a2a00434982169ff5710b19a4c1c">devices</a>;tmpDev;tmpDev=tmpDev-><a class="code" href="structdevice__node.html#747f88b0cd43b7b710d8fb86ea50fbaf">next</a>) {
<a name="l00092"></a>00092 <span class="keywordflow">if</span> ((tmpDev-><a class="code" href="structdevice__node.html#588d09d5dabf1c8866d359aaac799b1c">devInfo</a>-><a class="code" href="structdevice__interface.html#7eb42b0bb3e06dbc9183531a5e59ddb8">major</a> == major) && (tmpDev-><a class="code" href="structdevice__node.html#3817327901b55e2ca15b2e4dfa20789f">minor</a> == minor)) {
<a name="l00093"></a>00093 <a class="code" href="spinlock_8h.html#dd996cbbb3b9826dd9c8cf02b66a4c65">spinUnlock</a>(&<a class="code" href="device_8c.html#9c7fbb38f0fb266ba997f51da7cf8a50">deviceSpinLock</a>);
<a name="l00094"></a>00094 <span class="keywordflow">return</span>(tmpDev);
<a name="l00095"></a>00095 }
<a name="l00096"></a>00096 }
<a name="l00097"></a>00097
<a name="l00098"></a>00098 <a class="code" href="spinlock_8h.html#dd996cbbb3b9826dd9c8cf02b66a4c65">spinUnlock</a>(&<a class="code" href="device_8c.html#9c7fbb38f0fb266ba997f51da7cf8a50">deviceSpinLock</a>);
<a name="l00099"></a>00099 <span class="keywordflow">return</span>(0x0);
<a name="l00100"></a>00100 }
<a name="l00101"></a>00101
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="comment">/********************************************************************************************</span>
<a name="l00104"></a>00104 <span class="comment"></span>
<a name="l00105"></a>00105 <span class="comment">Function: int deviceRemove(struct *device_node);</span>
<a name="l00106"></a>00106 <span class="comment"></span>
<a name="l00107"></a>00107 <span class="comment">Description: This will remove a device based on it's pointer</span>
<a name="l00108"></a>00108 <span class="comment"></span>
<a name="l00109"></a>00109 <span class="comment">*********************************************************************************************/</span>
<a name="l00110"></a><a class="code" href="device_8c.html#b6cc746d95021f087eb5aef767050e71">00110</a> <span class="keywordtype">int</span> <a class="code" href="device_8h.html#37fc0f624e03e0998fd2dd5922505ada">device_remove</a>(<span class="keyword">struct</span> <a class="code" href="structdevice__node.html">device_node</a> *deviceToDelete)
<a name="l00111"></a>00111 {
<a name="l00112"></a>00112 <span class="keyword">struct </span><a class="code" href="structdevice__node.html">device_node</a> *current, *previous;
<a name="l00113"></a>00113
<a name="l00114"></a>00114
<a name="l00115"></a>00115 current = <a class="code" href="device_8c.html#90d9a2a00434982169ff5710b19a4c1c">devices</a>;
<a name="l00116"></a>00116 previous=<a class="code" href="types_8h.html#070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;
<a name="l00117"></a>00117 <a class="code" href="spinlock_8h.html#2cd9a4502680fb8e7f0fe6b029e558b1">spinLock</a>(&<a class="code" href="device_8c.html#9c7fbb38f0fb266ba997f51da7cf8a50">deviceSpinLock</a>);
<a name="l00118"></a>00118 <span class="keywordflow">while</span>(current != <a class="code" href="types_8h.html#070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00119"></a>00119 {
<a name="l00120"></a>00120 <span class="keywordflow">if</span>(current==deviceToDelete) <span class="keywordflow">break</span>;
<a name="l00121"></a>00121 <span class="keywordflow">else</span>
<a name="l00122"></a>00122 {
<a name="l00123"></a>00123 previous = current;
<a name="l00124"></a>00124 current = current-><a class="code" href="structdevice__node.html#747f88b0cd43b7b710d8fb86ea50fbaf">next</a>;
<a name="l00125"></a>00125 }
<a name="l00126"></a>00126 }
<a name="l00127"></a>00127 <span class="keywordflow">if</span>(current == <a class="code" href="types_8h.html#070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00128"></a>00128 {
<a name="l00129"></a>00129 <a class="code" href="spinlock_8h.html#dd996cbbb3b9826dd9c8cf02b66a4c65">spinUnlock</a>(&<a class="code" href="device_8c.html#9c7fbb38f0fb266ba997f51da7cf8a50">deviceSpinLock</a>);
<a name="l00130"></a>00130 <span class="keywordflow">return</span> 1;
<a name="l00131"></a>00131 }
<a name="l00132"></a>00132 <span class="keywordflow">else</span>
<a name="l00133"></a>00133 {
<a name="l00134"></a>00134 <span class="keywordflow">if</span>(current == <a class="code" href="device_8c.html#90d9a2a00434982169ff5710b19a4c1c">devices</a>)
<a name="l00135"></a>00135 <a class="code" href="device_8c.html#90d9a2a00434982169ff5710b19a4c1c">devices</a> = <a class="code" href="device_8c.html#90d9a2a00434982169ff5710b19a4c1c">devices</a>-><a class="code" href="structdevice__node.html#747f88b0cd43b7b710d8fb86ea50fbaf">next</a>;
<a name="l00136"></a>00136 <span class="keywordflow">else</span>
<a name="l00137"></a>00137 previous-><a class="code" href="structdevice__node.html#747f88b0cd43b7b710d8fb86ea50fbaf">next</a> = current-><a class="code" href="structdevice__node.html#747f88b0cd43b7b710d8fb86ea50fbaf">next</a>;
<a name="l00138"></a>00138 <a class="code" href="kmalloc_8h.html#aa9ed6886459604cf73ccdbf6410e487">kfree</a>(current);
<a name="l00139"></a>00139 <a class="code" href="spinlock_8h.html#dd996cbbb3b9826dd9c8cf02b66a4c65">spinUnlock</a>(&<a class="code" href="device_8c.html#9c7fbb38f0fb266ba997f51da7cf8a50">deviceSpinLock</a>);
<a name="l00140"></a>00140 <span class="keywordflow">return</span> 1;
<a name="l00141"></a>00141 }
<a name="l00142"></a>00142
<a name="l00143"></a>00143 <a class="code" href="spinlock_8h.html#dd996cbbb3b9826dd9c8cf02b66a4c65">spinUnlock</a>(&<a class="code" href="device_8c.html#9c7fbb38f0fb266ba997f51da7cf8a50">deviceSpinLock</a>);
<a name="l00144"></a>00144 <span class="keywordflow">return</span> 0x0;
<a name="l00145"></a>00145 }
<a name="l00146"></a>00146
<a name="l00147"></a>00147
<a name="l00148"></a>00148 <span class="comment">/***</span>
<a name="l00149"></a>00149 <span class="comment"> END</span>
<a name="l00150"></a>00150 <span class="comment"> ***/</span>
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Fri Dec 15 11:18:55 2006 for UbixOS V2 by
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