Hi Stefan,<br><br>1. I used the 0x1c0002000 offset because I was referring to the first reply that I received. Now, I used the address 0x1c0002000 and tried to read from it. I retrieved 0x0f01c087. May I know what does this mean? How does this data relate to Board ID?<br><br>2. Referring back to <tt><tt>"Embedded Planet 440xC" document, I tried to activate the USER_LED0/USER_LED1 (with new address 0x1c0000000 + 0x2 offset) by setting it to 0. But didn't see the led turned on. Did some experiments and tried 0x1c0000000 without offset, sent 0, and found that USER_LED0 (CR3) and USER_LED1 (CR4) are activated! This got me confused. May I know why is this so? Could you please refer me to some documents?<br><br><br>Thanks for all the assistance.<br><br>Regards,<br>dell<br></tt></tt><b><i>Stefan Roese <sr@denx.de></i></b> wrote:<blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"> On Thursday 29 November 2007, Dell
Query wrote:<br>> I see. No wonder I couldn't get more information on BCSR. I should contact<br>> sequoia to get the proper details like the correct addresses.<br>><br>> I already used ioremap64(), remapping 0x1c0002000. I got a hex value for<br>> the Board ID but could figure out what it means. So I tried the<br>> USER_LED0/USER_LED1 (base address+0x2), to see if I could turn on/off the<br>> user LEDS, but still no luck. I think I am accessing the wrong addresses so<br>> I need to verify it with them.<br><br>Why do think you need the offset 0x2000? I just tested on my Sequoia under <br>U-Boot and "see" the CPLD at address 0xc000.0000:<br><br>=> md.b c0000000 20<br>c0000000: 0f 00 c0 07 00 80 00 80 00 20 00 00 00 00 00 00 ......... ......<br>c0000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................<br><br>So you should map not 0x1.c000.2000 but 0x1.c000.0000 under Linux. Please let <br>me know if this works.<br><br>Best
regards,<br>Stefan<br><br>=====================================================================<br>DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel<br>HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany<br>Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: office@denx.de<br>=====================================================================<br></blockquote><br><p> 
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