rtl8019_8c-source.html

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00251     <span class="comment">// clear the packet stored interrupt</span>
00252     rtl8019Write(ISR,PTX);
00253 
00254     <span class="comment">// load data byte count for remote DMA</span>
00255     rtl8019Write(RBCR0, (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>)(packetLength));
00256     rtl8019Write(RBCR1, (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>)(packetLength&gt;&gt;8));
00257 
00258     rtl8019Write(TBCR0, (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>)(sendPacketLength));
00259     rtl8019Write(TBCR1, (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>)((sendPacketLength)&gt;&gt;8));
00260     
00261     <span class="comment">// do remote write operation</span>
00262     rtl8019Write(CR,(RD1|START));
00263 }
00264 
00265 
00266 <span class="keywordtype">void</span> rtl8019SendPacketData(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *localBuffer, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length)
00267 {
00268     <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i;
00269     
00270     <span class="comment">// write data to DMA port</span>
00271     <span class="keywordflow">for</span>(i=0;i&lt;length;i++)
00272         rtl8019Write(RDMAPORT, localBuffer[i]);
00273 }
00274 
00275 
00276 <span class="keywordtype">void</span> rtl8019EndPacketSend(<span class="keywordtype">void</span>)
00277 {
00278     <span class="comment">//send the contents of the transmit buffer onto the network</span>
00279     rtl8019Write(CR,(RD2|TXP));
00280     <span class="comment">// clear the remote DMA interrupt</span>
00281     rtl8019Write(ISR, RDC);
00282 }
00283 
00284 
00285 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> rtl8019BeginPacketRetreive(<span class="keywordtype">void</span>)
00286 {
00287     <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> i;
00288     <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> bnry;
00289     
00290     <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> pageheader[4];
00291     <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> rxlen;
00292     
00293     <span class="comment">// check for and handle an overflow</span>
00294     rtl8019ProcessInterrupt();
00295     
00296     <span class="comment">// read CPR from page 1</span>
00297     rtl8019Write(CR,(PS0|RD2|START));
00298     i = rtl8019Read(CPR);
00299     
00300     <span class="comment">// return to page 0</span>
00301     rtl8019Write(CR,(RD2|START));
00302     
00303     <span class="comment">// read the boundary register - pointing to the beginning of the packet</span>
00304     bnry = rtl8019Read(BNRY) ;
00305     
00306     <span class="comment">// return if there is no packet in the buffer</span>
00307     <span class="keywordflow">if</span>( bnry == i )
00308         <span class="keywordflow">return</span> 0;
00309 
00310     <span class="comment">// clear the packet received interrupt flag</span>
00311     rtl8019Write(ISR, PRX);
00312     
00313     <span class="comment">// if boundary pointer is invalid</span>
00314     <span class="keywordflow">if</span>( (bnry &gt;= RXSTOP_INIT) || (bnry &lt; RXSTART_INIT) )
00315     {
00316         <span class="comment">// reset the contents of the buffer and exit</span>
00317         rtl8019Write(BNRY, RXSTART_INIT);
00318         rtl8019Write(CR, (PS0|RD2|START));
00319         rtl8019Write(CPR, RXSTART_INIT);
00320         rtl8019Write(CR, (RD2|START));
00321         <span class="keywordflow">return</span> 0;
00322     }
00323 
00324     <span class="comment">// initiate DMA to transfer the RTL8019 packet header</span>
00325     rtl8019Write(RBCR0, 4);
00326     rtl8019Write(RBCR1, 0);
00327     rtl8019Write(RSAR0, 0);
00328     rtl8019Write(RSAR1, bnry);
00329     rtl8019Write(CR, (RD0|START));
00330     <span class="comment">// transfer packet header</span>
00331     <span class="keywordflow">for</span>(i=0;i&lt;4;i++)
00332         pageheader[i] = rtl8019Read(RDMAPORT);
00333     <span class="comment">// end the DMA operation</span>
00334     rtl8019Write(CR, (RD2|START));
00335     <span class="comment">// wait for remote DMA complete</span>
00336     <span class="keywordflow">for</span>(i = 0; i &lt; 20; i++)
00337         <span class="keywordflow">if</span>(rtl8019Read(ISR) &amp; RDC)
00338             <span class="keywordflow">break</span>;
00339     rtl8019Write(ISR, RDC);
00340 
00341     rxlen = (pageheader[PKTHEADER_PKTLENH]&lt;&lt;8) + pageheader[PKTHEADER_PKTLENL];
00342     NextPage = pageheader[PKTHEADER_NEXTPAGE];
00343     
00344     CurrentRetreiveAddress = (bnry&lt;&lt;8) + 4;
00345     
00346     <span class="comment">// if the NextPage pointer is invalid, the packet is not ready yet - exit</span>
00347     <span class="keywordflow">if</span>( (NextPage &gt;= RXSTOP_INIT) || (NextPage &lt; RXSTART_INIT) )
00348         <span class="keywordflow">return</span> 0;
00349     
00350     <span class="keywordflow">return</span> rxlen-4;
00351 }
00352 
00353 
00354 <span class="keywordtype">void</span> rtl8019RetreivePacketData(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> * localBuffer, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length)
00355 {
00356     <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i;
00357     
00358     <span class="comment">// initiate DMA to transfer the data</span>
00359     rtl8019Write(RBCR0, (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>)length);
00360     rtl8019Write(RBCR1, (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>)(length&gt;&gt;8));
00361     rtl8019Write(RSAR0, (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>)CurrentRetreiveAddress);
00362     rtl8019Write(RSAR1, (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>)(CurrentRetreiveAddress&gt;&gt;8));
00363     rtl8019Write(CR, (RD0|START));
00364     <span class="comment">// transfer packet data</span>
00365     <span class="keywordflow">for</span>(i=0;i&lt;length;i++)
00366         localBuffer[i] = rtl8019Read(RDMAPORT);
00367     <span class="comment">// end the DMA operation</span>
00368     rtl8019Write(CR, (RD2|START));
00369     <span class="comment">// wait for remote DMA complete</span>
00370     <span class="keywordflow">for</span>(i=0; i&lt;20; i++)
00371         <span class="keywordflow">if</span>(rtl8019Read(ISR) &amp; RDC)
00372             <span class="keywordflow">break</span>;
00373     rtl8019Write(ISR, RDC);
00374     <span class="comment">// keep track of current address</span>
00375     CurrentRetreiveAddress += length;
00376     <span class="keywordflow">if</span>( CurrentRetreiveAddress &gt;= 0x6000 )
00377         CurrentRetreiveAddress = CurrentRetreiveAddress - (0x6000-0x4600) ;
00378 }
00379 
00380 
00381 <span class="keywordtype">void</span> rtl8019EndPacketRetreive(<span class="keywordtype">void</span>)
00382 {
00383     <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> i;
00384 
00385     <span class="comment">// end the DMA operation</span>
00386     rtl8019Write(CR, (RD2|START));
00387     <span class="comment">// wait for remote DMA complete</span>
00388     <span class="keywordflow">for</span>(i=0; i&lt;20; i++)
00389         <span class="keywordflow">if</span>(rtl8019Read(ISR) &amp; RDC)
00390             <span class="keywordflow">break</span>;
00391     rtl8019Write(ISR, RDC);
00392 
00393     <span class="comment">// set the boundary register to point to the start of the next packet</span>
00394     rtl8019Write(BNRY, NextPage);
00395 }
00396 
00397 
00398 <span class="keywordtype">void</span> rtl8019ProcessInterrupt(<span class="keywordtype">void</span>)
00399 {
00400     <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> byte = rtl8019Read(ISR);
00401     
00402     <span class="keywordflow">if</span>( byte &amp; OVW )
00403         rtl8019ReceiveOverflowRecover();
00404 }
00405 
00406 <span class="keywordtype">void</span> rtl8019ReceiveOverflowRecover(<span class="keywordtype">void</span>)
00407 {
00408     <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> data_L, resend;   
00409 
00410     data_L = rtl8019Read(CR);
00411     rtl8019Write(CR, 0x21);
00412     delay_ms(2);
00413     rtl8019Write(RBCR0, 0x00);
00414     rtl8019Write(RBCR1, 0x00);
00415     <span class="keywordflow">if</span>(!(data_L &amp; 0x04))
00416         resend = 0;
00417     <span class="keywordflow">else</span> <span class="keywordflow">if</span>(data_L &amp; 0x04)
00418     {
00419         data_L = rtl8019Read(ISR);
00420         <span class="keywordflow">if</span>((data_L &amp; 0x02) || (data_L &amp; 0x08))
00421             resend = 0;
00422         <span class="keywordflow">else</span>
00423             resend = 1;
00424     }
00425     
00426     rtl8019Write(TCR, 0x02);
00427     rtl8019Write(CR, 0x22);
00428     rtl8019Write(BNRY, RXSTART_INIT);
00429     rtl8019Write(CR, 0x62);
00430     rtl8019Write(CPR, RXSTART_INIT);
00431     rtl8019Write(CR, 0x22);
00432     rtl8019Write(ISR, 0x10);
00433     rtl8019Write(TCR, TCR_INIT);
00434     
00435     <span class="keywordflow">if</span>(resend)
00436         rtl8019Write(CR, 0x26);
00437 
00438     rtl8019Write(ISR, 0xFF);
00439 }
00440 
00441 
00442 <span class="keywordtype">void</span> rtl8019RegDump(<span class="keywordtype">void</span>)
00443 {
00444 <span class="comment">//  unsigned char result;</span>
00445 <span class="comment">//  result = rtl8019Read(TR);</span>
00446     
00447 <span class="comment">//  rprintf("Media State: ");</span>
00448 <span class="comment">//  if(!(result &amp; AUTOD))</span>
00449 <span class="comment">//          rprintf("Autonegotiation\r\n");</span>
00450 <span class="comment">//  else if(result &amp; RST_B)</span>
00451 <span class="comment">//          rprintf("PHY in Reset   \r\n");</span>
00452 <span class="comment">//  else if(!(result &amp; RST_10B))</span>
00453 <span class="comment">//      rprintf("10BASE-T       \r\n");</span>
00454 <span class="comment">//  else if(!(result &amp; RST_TXB))</span>
00455 <span class="comment">//      rprintf("100BASE-T      \r\n");</span>
00456                 
00457     <span class="comment">//rprintf("TR regsiter      : %x\r\n",result);</span>
00458     <span class="comment">//result = read_mii(0x10,0);</span>
00459     <span class="comment">//rprintf("MII regsiter 0x10: %x\r\n",result);</span>
00460 
00461     rprintf(<span class="stringliteral">"Page0: CR  BNRY PSR PST ISR TSR RSR MMR TR  GPI\r\n"</span>);
00462     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"       "</span>);
00463     <a class="code" href="group__rprintf.html#ga7">rprintfu08</a>(rtl8019Read(CR));
00464     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"  "</span>);
00465     <a class="code" href="group__rprintf.html#ga7">rprintfu08</a>(rtl8019Read(BNRY));
00466     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"   "</span>);
00467     <a class="code" href="group__rprintf.html#ga7">rprintfu08</a>(rtl8019Read(PSTART));
00468     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"  "</span>);
00469     <a class="code" href="group__rprintf.html#ga7">rprintfu08</a>(rtl8019Read(PSTOP));
00470     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"  "</span>);
00471     <a class="code" href="group__rprintf.html#ga7">rprintfu08</a>(rtl8019Read(ISR));
00472     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"  "</span>);
00473     <a class="code" href="group__rprintf.html#ga7">rprintfu08</a>(rtl8019Read(TSR));
00474     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"  "</span>);
00475     <a class="code" href="group__rprintf.html#ga7">rprintfu08</a>(rtl8019Read(RSR));
00476     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"  "</span>);
00477 <span class="comment">//  rprintfu08(rtl8019Read(MEMR));</span>
00478     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"  "</span>);
00479 <span class="comment">//  rprintfu08(rtl8019Read(TR));</span>
00480     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"  "</span>);
00481 <span class="comment">//  rprintfu08(rtl8019Read(GPI));</span>
00482     <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
00483 
00484     rtl8019Write(CR,rtl8019Read(CR)|PS0);
00485 
00486     rprintf(<span class="stringliteral">"Page1: CR  PAR    CPR\r\n"</span>);
00487     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"       "</span>);
00488     <a class="code" href="group__rprintf.html#ga7">rprintfu08</a>(rtl8019Read(CR));
00489     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"  "</span>);
00490     <a class="code" href="group__rprintf.html#ga1">rprintfChar</a>(rtl8019Read(PAR0));
00491     <a class="code" href="group__rprintf.html#ga1">rprintfChar</a>(rtl8019Read(PAR1));
00492     <a class="code" href="group__rprintf.html#ga1">rprintfChar</a>(rtl8019Read(PAR2));
00493     <a class="code" href="group__rprintf.html#ga1">rprintfChar</a>(rtl8019Read(PAR3));
00494     <a class="code" href="group__rprintf.html#ga1">rprintfChar</a>(rtl8019Read(PAR4));
00495     <a class="code" href="group__rprintf.html#ga1">rprintfChar</a>(rtl8019Read(PAR5));
00496     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">" "</span>);
00497     <a class="code" href="group__rprintf.html#ga7">rprintfu08</a>(rtl8019Read(CPR));
00498     
00499     rtl8019Write(CR,rtl8019Read(CR)&amp;~PS0);
00500 
00501     delay_ms(25);
00502 }
00503 
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