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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>Procyon AVRlib: net/rtl8019.c Source File</title><link href="dox.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.4.2 --><div class="qindex"><a class="qindex" href="main.html">Main Page</a> | <a class="qindex" href="modules.html">Modules</a> | <a class="qindex" href="annotated.html">Data Structures</a> | <a class="qindex" href="dirs.html">Directories</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="functions.html">Data Fields</a> | <a class="qindex" href="globals.html">Globals</a> | <a class="qindex" href="pages.html">Related Pages</a></div><div class="nav"><a class="el" href="dir_000001.html">net</a></div><h1>rtl8019.c</h1><a href="rtl8019_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001 <span class="comment">/*! \file rtl8019.c \brief Realtek RTL8019AS Ethernet Interface Driver. */</span>00002 <span class="comment">//*****************************************************************************</span>00003 <span class="comment">//</span>00004 <span class="comment">// File Name : 'rtl8019.c'</span>00005 <span class="comment">// Title : Realtek RTL8019AS Ethernet Interface Driver</span>00006 <span class="comment">// Author : Pascal Stang</span>00007 <span class="comment">// Created : 7/6/2004</span>00008 <span class="comment">// Revised : 10/1/2005</span>00009 <span class="comment">// Version : 0.1</span>00010 <span class="comment">// Target MCU : Atmel AVR series</span>00011 <span class="comment">// Editor Tabs : 4</span>00012 <span class="comment">//</span>00013 <span class="comment">// Based in part on code by Louis Beaudoin (www.embedded-creations.com).</span>00014 <span class="comment">// Thanks to Adam Dunkels and Louis Beaudoin for providing the initial</span>00015 <span class="comment">// structure in which to write this driver.</span>00016 <span class="comment">//*****************************************************************************</span>00017 00018 <span class="preprocessor">#include "<a class="code" href="global_8h.html">global.h</a>"</span>00019 <span class="preprocessor">#include "<a class="code" href="timer_8h.html">timer.h</a>"</span>00020 <span class="preprocessor">#include "<a class="code" href="rprintf_8h.html">rprintf.h</a>"</span>00021 00022 <span class="preprocessor">#include "<a class="code" href="rtl8019_8h.html">rtl8019.h</a>"</span>00023 00024 <span class="comment">// include configuration</span>00025 <span class="preprocessor">#include "<a class="code" href="rtl8019conf_8h.html">rtl8019conf.h</a>"</span>00026 00027 <span class="comment">// pointers to locations in the RTL8019 receive buffer</span>00028 <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> NextPage; <span class="comment">// page pointer to next Rx packet</span>00029 <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> CurrentRetreiveAddress; <span class="comment">// DMA address for read Rx packet location</span>00030 00031 <a name="l00032"></a><a class="code" href="group__nic.html#ga0">00032</a> <span class="keywordtype">void</span> <a class="code" href="group__nic.html#ga0">nicInit</a>(<span class="keywordtype">void</span>)00033 {00034 rtl8019Init();00035 }00036 <a name="l00037"></a><a class="code" href="group__nic.html#ga1">00037</a> <span class="keywordtype">void</span> <a class="code" href="group__nic.html#ga1">nicSend</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>* packet)00038 {00039 rtl8019BeginPacketSend(len);00040 rtl8019SendPacketData(packet, len);00041 rtl8019EndPacketSend();00042 }00043 <a name="l00044"></a><a class="code" href="group__nic.html#ga2">00044</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="group__nic.html#ga2">nicPoll</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> maxlen, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>* packet)00045 {00046 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> packetLength;00047 00048 packetLength = rtl8019BeginPacketRetreive();00049 00050 <span class="comment">// if there's no packet or an error - exit without ending the operation</span>00051 <span class="keywordflow">if</span>( !packetLength )00052 <span class="keywordflow">return</span> 0;00053 00054 <span class="comment">// drop anything too big for the buffer</span>00055 <span class="keywordflow">if</span>( packetLength > maxlen )00056 {00057 rtl8019EndPacketRetreive();00058 <span class="keywordflow">return</span> 0;00059 }00060 00061 <span class="comment">// copy the packet data into the packet buffer</span>00062 rtl8019RetreivePacketData( packet, packetLength );00063 rtl8019EndPacketRetreive();00064 00065 <span class="keywordflow">return</span> packetLength;00066 }00067 00068 <span class="keywordtype">void</span> nicGetMacAddress(u08* macaddr)00069 {00070 u08 tempCR;00071 <span class="comment">// switch register pages</span>00072 tempCR = rtl8019Read(CR);00073 rtl8019Write(CR,tempCR|PS0);00074 <span class="comment">// read MAC address registers</span>00075 *macaddr++ = rtl8019Read(PAR0);00076 *macaddr++ = rtl8019Read(PAR1);00077 *macaddr++ = rtl8019Read(PAR2);00078 *macaddr++ = rtl8019Read(PAR3);00079 *macaddr++ = rtl8019Read(PAR4);00080 *macaddr++ = rtl8019Read(PAR5);00081 <span class="comment">// switch register pages back</span>00082 rtl8019Write(CR,tempCR);00083 }00084 00085 <span class="keywordtype">void</span> nicSetMacAddress(u08* macaddr)00086 {00087 u08 tempCR;00088 <span class="comment">// switch register pages</span>00089 tempCR = rtl8019Read(CR);00090 rtl8019Write(CR,tempCR|PS0);00091 <span class="comment">// write MAC address registers</span>00092 rtl8019Write(PAR0, *macaddr++);00093 rtl8019Write(PAR1, *macaddr++);00094 rtl8019Write(PAR2, *macaddr++);00095 rtl8019Write(PAR3, *macaddr++);00096 rtl8019Write(PAR4, *macaddr++);00097 rtl8019Write(PAR5, *macaddr++);00098 <span class="comment">// switch register pages back</span>00099 rtl8019Write(CR,tempCR);00100 }00101 <a name="l00102"></a><a class="code" href="group__nic.html#ga5">00102</a> <span class="keywordtype">void</span> <a class="code" href="group__nic.html#ga5">nicRegDump</a>(<span class="keywordtype">void</span>)00103 {00104 rtl8019RegDump();00105 }00106 00107 00108 <span class="keywordtype">void</span> rtl8019SetupPorts(<span class="keywordtype">void</span>)00109 {00110 <span class="preprocessor">#if NIC_CONNECTION == MEMORY_MAPPED</span>00111 <span class="preprocessor"></span> <span class="comment">// enable external SRAM interface - no wait states</span>00112 sbi(MCUCR, SRE);00113 <span class="comment">// sbi(MCUCR, SRW10);</span>00114 <span class="comment">// sbi(XMCRA, SRW00);</span>00115 <span class="comment">// sbi(XMCRA, SRW01);</span>00116 <span class="comment">// sbi(XMCRA, SRW11);</span>00117 <span class="preprocessor">#else</span>00118 <span class="preprocessor"></span> <span class="comment">// make the address port output</span>00119 RTL8019_ADDRESS_DDR |= RTL8019_ADDRESS_MASK;00120 <span class="comment">// make the data port input with pull-ups</span>00121 RTL8019_DATA_PORT = 0xFF;00122 00123 <span class="comment">// initialize the control port read and write pins to de-asserted</span>00124 RTL8019_CONTROL_DDR |= (1<<RTL8019_CONTROL_READPIN);00125 RTL8019_CONTROL_DDR |= (1<<RTL8019_CONTROL_WRITEPIN);00126 <span class="comment">// set the read and write pins to output</span>00127 RTL8019_CONTROL_PORT |= (1<<RTL8019_CONTROL_READPIN);00128 RTL8019_CONTROL_PORT |= (1<<RTL8019_CONTROL_WRITEPIN);00129 <span class="preprocessor">#endif</span>00130 <span class="preprocessor"></span> <span class="comment">// set reset pin to output</span>00131 sbi(RTL8019_RESET_DDR, RTL8019_RESET_PIN);00132 }00133 00134 00135 <span class="preprocessor">#if NIC_CONNECTION == MEMORY_MAPPED</span>00136 <span class="preprocessor"></span><span class="keyword">inline</span> <span class="keywordtype">void</span> rtl8019Write(u08 address, u08 data)00137 {00138 *(<span class="keyword">volatile</span> u08*)(RTL8019_MEMORY_MAPPED_OFFSET + address) = data;00139 }00140 <span class="preprocessor">#else</span>00141 <span class="preprocessor"></span><span class="keywordtype">void</span> rtl8019Write(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> address, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> data)00142 {00143 <span class="comment">// assert the address</span>00144 RTL8019_ADDRESS_PORT = address | (RTL8019_ADDRESS_PORT&~RTL8019_ADDRESS_MASK);00145 <span class="comment">// set data bus as output and place data on bus</span>00146 RTL8019_DATA_DDR = 0xFF;00147 RTL8019_DATA_PORT = data;00148 <span class="comment">// clock write pin</span>00149 cbi(RTL8019_CONTROL_PORT, RTL8019_CONTROL_WRITEPIN);00150 nop();00151 nop();00152 sbi(RTL8019_CONTROL_PORT, RTL8019_CONTROL_WRITEPIN);00153 <span class="comment">// set data port back to input with pullups enabled</span>00154 RTL8019_DATA_DDR = 0x00;00155 RTL8019_DATA_PORT = 0xFF;00156 }00157 <span class="preprocessor">#endif</span>00158 <span class="preprocessor"></span>00159 00160 <span class="preprocessor">#if NIC_CONNECTION == MEMORY_MAPPED</span>00161 <span class="preprocessor"></span><span class="keyword">inline</span> u08 ax88796Read(u08 address)00162 {00163 <span class="keywordflow">return</span> *(<span class="keyword">volatile</span> u08*)(RTL8019_MEMORY_MAPPED_OFFSET + address);00164 }00165 <span class="preprocessor">#else</span>00166 <span class="preprocessor"></span><span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> rtl8019Read(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> address)00167 {00168 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> data;00169 00170 <span class="comment">// assert the address</span>00171 RTL8019_ADDRESS_PORT = address | (RTL8019_ADDRESS_PORT&~RTL8019_ADDRESS_MASK);00172 <span class="comment">// assert read</span>00173 cbi(RTL8019_CONTROL_PORT, RTL8019_CONTROL_READPIN);00174 nop();00175 nop();00176 <span class="comment">// read in the data</span>00177 data = RTL8019_DATA_PIN;00178 <span class="comment">// negate read</span>00179 sbi(RTL8019_CONTROL_PORT, RTL8019_CONTROL_READPIN);00180 <span class="comment">// return data</span>00181 <span class="keywordflow">return</span> data;00182 }00183 <span class="preprocessor">#endif </span>00184 <span class="preprocessor"></span>00185 00186 <span class="keywordtype">void</span> rtl8019Init(<span class="keywordtype">void</span>)00187 {00188 <span class="comment">// setup I/O ports</span>00189 rtl8019SetupPorts();00190 00191 <span class="comment">// do a hard reset</span>00192 sbi(RTL8019_RESET_PORT, RTL8019_RESET_PIN);00193 delay_ms(10);00194 cbi(RTL8019_RESET_PORT, RTL8019_RESET_PIN);00195 00196 <span class="comment">// clear interrupt state</span>00197 rtl8019Write( ISR, rtl8019Read(ISR) );00198 delay_ms(50);00199 00200 <span class="comment">// switch to page 3 to load config registers</span>00201 rtl8019Write(CR, (PS0|PS1|RD2|STOP));00202 00203 <span class="comment">// disable EEPROM write protect of config registers</span>00204 rtl8019Write(RTL_EECR, (EEM1|EEM0));00205 00206 <span class="comment">// set network type to 10 Base-T link test</span>00207 rtl8019Write(CONFIG2, 0x20);00208 00209 <span class="comment">// disable powerdown and sleep</span>00210 rtl8019Write(CONFIG3, 0);00211 delay_ms(255);00212 00213 <span class="comment">// reenable EEPROM write protect</span>00214 rtl8019Write(RTL_EECR, 0);00215 00216 <span class="comment">// go back to page 0, stop NIC, abort DMA</span>00217 rtl8019Write(CR, (RD2|STOP));00218 delay_ms(2); <span class="comment">// wait for traffic to complete</span>00219 rtl8019Write(DCR, DCR_INIT);00220 rtl8019Write(RBCR0,0x00);00221 rtl8019Write(RBCR1,0x00);00222 rtl8019Write(RCR, AB);00223 rtl8019Write(TPSR, TXSTART_INIT);00224 rtl8019Write(TCR, LB0);00225 rtl8019Write(PSTART, RXSTART_INIT);00226 rtl8019Write(BNRY, RXSTART_INIT);00227 rtl8019Write(PSTOP, RXSTOP_INIT);00228 rtl8019Write(CR, (PS0|RD2|STOP)); <span class="comment">// switch to page 1</span>00229 delay_ms(2);00230 rtl8019Write(CPR, RXSTART_INIT);00231 00232 <span class="comment">// set MAC address</span>00233 rtl8019Write(PAR0, RTL8019_MAC0);00234 rtl8019Write(PAR1, RTL8019_MAC1);00235 rtl8019Write(PAR2, RTL8019_MAC2);00236 rtl8019Write(PAR3, RTL8019_MAC3);00237 rtl8019Write(PAR4, RTL8019_MAC4);00238 rtl8019Write(PAR5, RTL8019_MAC5);00239 00240 <span class="comment">// initialize sequence per NE2000 spec</span>00241 rtl8019Write(CR, (RD2|STOP));00242 rtl8019Write(DCR, DCR_INIT);00243 rtl8019Write(CR, (RD2|START));00244 rtl8019Write(ISR,0xFF); <span class="comment">// clear all interrupts</span>00245 rtl8019Write(IMR, IMR_INIT);00246 rtl8019Write(TCR, TCR_INIT);00247 00248 rtl8019Write(CR, (RD2|START)); <span class="comment">// start the NIC</span>00249 }00250 00251 00252 <span class="keywordtype">void</span> rtl8019BeginPacketSend(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> packetLength)00253 {00254 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> sendPacketLength;00255 sendPacketLength = (packetLength>=ETHERNET_MIN_PACKET_LENGTH)?00256 (packetLength):ETHERNET_MIN_PACKET_LENGTH;00257 00258 <span class="comment">//start the NIC</span>00259 rtl8019Write(CR, (RD2|START));00260 ⌨️ 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