ppc4xx: DDR/ECC: Use correct macros to clear error status

Use the correct macro instead of the hardcoded 0x4c to clear the ECC
status in the 440/460 DDR(2) error status register after ECC
initialization.

Also the non-440 parts (405EX(r) right now) and the IBM DDR PPC variants
(440GX) use a different registers to clear this error status. Use the
correct ones.

Signed-off-by: Stefan Roese <sr@denx.de>

arch/powerpc/cpu/ppc4xx/ecc.c

@@ -130,7 +130,26 @@ static void program_ecc_addr(unsigned long start_address,
 
 		/* clear ECC error repoting registers */
 		mtsdram(SDRAM_ECCES, 0xffffffff);
-		mtdcr(0x4c, 0xffffffff);
+#if defined(CONFIG_SDRAM_PPC4xx_IBM_DDR)
+		/*
+		 * IBM DDR(1) core (440GX):
+		 * Clear Mx bits in SDRAM0_BESR0/1
+		 */
+		mtsdram(SDRAM0_BESR0, 0xffffffff);
+		mtsdram(SDRAM0_BESR1, 0xffffffff);
+#elif defined(CONFIG_440)
+		/*
+		 * 440/460 DDR2 core:
+		 * Clear EMID (Error PLB Master ID) in MQ0_ESL
+		 */
+		mtdcr(SDRAM_ERRSTATLL, 0xfff00000);
+#else
+		/*
+		 * 405EX(r) DDR2 core:
+		 * Clear M0ID (Error PLB Master ID) in SDRAM_BESR
+		 */
+		mtsdram(SDRAM_BESR, 0xf0000000);
+#endif
 
 		mtsdram(SDRAM_MCOPT1,
 			(mcopt1 & ~SDRAM_MCOPT1_MCHK_MASK) | SDRAM_MCOPT1_MCHK_CHK_REP);

arch/powerpc/include/asm/ppc4xx-sdram.h

@@ -63,6 +63,8 @@
 #define SDRAM_CFG0	0x20	/* memory controller options 0		*/
 #define SDRAM_CFG1	0x21	/* memory controller options 1		*/
 
+#define SDRAM0_BESR0	0x0000	/* bus error status reg 0		*/
+#define SDRAM0_BESR1	0x0008	/* bus error status reg 1		*/
 #define SDRAM0_BEAR	0x0010	/* bus error address reg		*/
 #define SDRAM0_SLIO	0x0018	/* ddr sdram slave interface options	*/
 #define SDRAM0_CFG0	0x0020	/* ddr sdram options 0			*/