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Fix DDR6 errata on TQM834x boards

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Patch by Thomas Waehner, 07 Mar 2006
This commit is contained in:
Wolfgang Denk 2006-06-16 16:53:06 +02:00
parent 14d9ab351c
commit 10af6d53bc
2 changed files with 27 additions and 0 deletions
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3
CHANGELOG
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@ -2,6 +2,9 @@
Changes since U-Boot 1.1.4:
======================================================================
* Fix DDR6 errata on TQM834x boards
Patch by Thomas Waehner, 07 Mar 2006
* Remove obsolete flash driver board/tqm5200/flash.c
Patch by Martin Krause, 11 Jan 2006

24
board/tqm834x/tqm834x.c
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@ -406,4 +406,28 @@ static void set_ddr_config(void) {
(DDR_REFINT_166MHZ_7US << SDRAM_INTERVAL_REFINT_SHIFT) |
(DDR_BSTOPRE << SDRAM_INTERVAL_BSTOPRE_SHIFT);
SYNC;
/* Workaround for DDR6 Erratum
* see MPC8349E Device Errata Rev.8, 2/2006
* This workaround influences the MPC internal "input enables"
* dependent on CAS latency and MPC revision. According to errata
* sheet the internal reserved registers for this workaround are
* not available from revision 2.0 and up.
*/
/* Get REVID from register SPRIDR. Skip workaround if rev >= 2.0
* (0x200)
*/
if ((im->sysconf.spridr & SPRIDR_REVID) < 0x200) {
/* There is a internal reserved register at IMMRBAR+0x2F00
* which has to be written with a certain value defined by
* errata sheet.
*/
#if defined(DDR_CASLAT_20)
*((u8 *)im + 0x2f00) = 0x201c0000;
#else
*((u8 *)im + 0x2f00) = 0x202c0000;
#endif
}
}