TQM885D: Exchanged SDRAM timing by a more relaxed timing.
CAS-Latency=2, Write Recovery Time tWR=2
The max. supported bus frequency is 66 MHz. Therefore, changed
threshold to switch from 1:1 mode to 2:1 from 80 MHz to 66 MHz.
Signed-off-by: Martin Krause <martin.krause@tqs.de>
diff --git a/board/tqm8xx/tqm8xx.c b/board/tqm8xx/tqm8xx.c
index cebdcc0..06bf5f8 100644
--- a/board/tqm8xx/tqm8xx.c
+++ b/board/tqm8xx/tqm8xx.c
@@ -37,6 +37,7 @@
#define _NOT_USED_ 0xFFFFFFFF
+/* UPM initialization table for SDRAM: 40, 50, 66 MHz CLKOUT @ CAS latency 2, tWR=2 */
const uint sdram_table[] =
{
/*
@@ -63,14 +64,14 @@
/*
* Single Write. (Offset 18 in UPMA RAM)
*/
- 0x1F0DFC04, 0xEEABBC00, 0x01B27C04, 0x1FF5FC47, /* last */
- _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+ 0x1F0DFC04, 0xEEABBC00, 0x11B77C04, 0xEFFAFC44,
+ 0x1FF5FC47, /* last */
+ _NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
* Burst Write. (Offset 20 in UPMA RAM)
*/
0x1F0DFC04, 0xEEABBC00, 0x10A77C00, 0xF0AFFC00,
- 0xF0AFFC00, 0xE1BAFC04, 0x1FF5FC47, /* last */
- _NOT_USED_,
+ 0xF0AFFC00, 0xF0AFFC04, 0xE1BAFC44, 0x1FF5FC47, /* last */
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
/*
@@ -83,7 +84,7 @@
/*
* Exception. (Offset 3c in UPMA RAM)
*/
- 0x7FFFFC07, /* last */
+ 0xFFFFFC07, /* last */
_NOT_USED_, _NOT_USED_, _NOT_USED_,
};