X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=cpu%2Fppc4xx%2Fsdram.c;h=7d60ad667fd7353dfe950b898ba16cfb1634ff54;hb=2e2050842e731c823ce8d41fb0c15579eb70ced9;hp=faeea5c91e7741293eca698675ab20753d008f5e;hpb=b5338b23a15779204cccb0706c06087b86c22f07;p=oweals%2Fu-boot.git

diff --git a/cpu/ppc4xx/sdram.c b/cpu/ppc4xx/sdram.c
index faeea5c91e..7d60ad667f 100644
--- a/cpu/ppc4xx/sdram.c
+++ b/cpu/ppc4xx/sdram.c
@@ -1,5 +1,5 @@
 /*
- * (C) Copyright 2005-2006
+ * (C) Copyright 2005-2007
  * Stefan Roese, DENX Software Engineering, sr@denx.de.
  *
  * (C) Copyright 2006
@@ -31,10 +31,11 @@
 #include <ppc4xx.h>
 #include <asm/processor.h>
 #include "sdram.h"
-
+#include "ecc.h"
 
 #ifdef CONFIG_SDRAM_BANK0
 
+#ifndef CONFIG_440
 
 #ifndef CFG_SDRAM_TABLE
 sdram_conf_t mb0cf[] = {
@@ -50,9 +51,6 @@ sdram_conf_t mb0cf[] = CFG_SDRAM_TABLE;
 
 #define N_MB0CF (sizeof(mb0cf) / sizeof(mb0cf[0]))
 
-
-#ifndef CONFIG_440
-
 #ifdef CFG_SDRAM_CASL
 static ulong ns2clks(ulong ns)
 {
@@ -166,7 +164,7 @@ static ulong compute_rtr(ulong speed, ulong rows, ulong refresh)
 /*
  * Autodetect onboard SDRAM on 405 platforms
  */
-void sdram_init(void)
+phys_size_t initdram(int board_type)
 {
 	ulong speed;
 	ulong sdtr1;
@@ -190,14 +188,14 @@ void sdram_init(void)
 		/*
 		 * Disable memory controller.
 		 */
-		mtsdram0(mem_mcopt1, 0x00000000);
+		mtsdram(mem_mcopt1, 0x00000000);
 
 		/*
 		 * Set MB0CF for bank 0.
 		 */
-		mtsdram0(mem_mb0cf, mb0cf[i].reg);
-		mtsdram0(mem_sdtr1, sdtr1);
-		mtsdram0(mem_rtr, compute_rtr(speed, mb0cf[i].rows, 64));
+		mtsdram(mem_mb0cf, mb0cf[i].reg);
+		mtsdram(mem_sdtr1, sdtr1);
+		mtsdram(mem_rtr, compute_rtr(speed, mb0cf[i].rows, 64));
 
 		udelay(200);
 
@@ -206,21 +204,67 @@ void sdram_init(void)
 		 * Set DC_EN to '1' and BRD_PRF to '01' for 16 byte PLB Burst
 		 * read/prefetch.
 		 */
-		mtsdram0(mem_mcopt1, 0x80800000);
+		mtsdram(mem_mcopt1, 0x80800000);
 
 		udelay(10000);
 
 		if (get_ram_size(0, mb0cf[i].size) == mb0cf[i].size) {
+			/*
+			 * OK, size detected.  Enable second bank if
+			 * defined (assumes same type as bank 0)
+			 */
+#ifdef CONFIG_SDRAM_BANK1
+			u32 b1cr = mb0cf[i].size | mb0cf[i].reg;
+
+			mtsdram(mem_mcopt1, 0x00000000);
+			mtsdram(mem_mb1cf, b1cr); /* SDRAM0_B1CR */
+			mtsdram(mem_mcopt1, 0x80800000);
+			udelay(10000);
+
+			/*
+			 * Check if 2nd bank is really available.
+			 * If the size not equal to the size of the first
+			 * bank, then disable the 2nd bank completely.
+			 */
+			if (get_ram_size((long *)mb0cf[i].size, mb0cf[i].size) !=
+			    mb0cf[i].size) {
+				mtsdram(mem_mb1cf, 0);
+				mtsdram(mem_mcopt1, 0);
+			}
+#endif
+
 			/*
 			 * OK, size detected -> all done
 			 */
-			return;
+			return mb0cf[i].size;
 		}
 	}
+
+	return 0;
 }
 
 #else /* CONFIG_440 */
 
+/*
+ * Define some default values. Those can be overwritten in the
+ * board config file.
+ */
+
+#ifndef CFG_SDRAM_TABLE
+sdram_conf_t mb0cf[] = {
+	{(256 << 20), 13, 0x000C4001},	/* 256MB mode 3, 13x10(4)	*/
+	{(64 << 20),  12, 0x00082001}	/* 64MB mode 2, 12x9(4)		*/
+};
+#else
+sdram_conf_t mb0cf[] = CFG_SDRAM_TABLE;
+#endif
+
+#ifndef CFG_SDRAM0_TR0
+#define	CFG_SDRAM0_TR0		0x41094012
+#endif
+
+#define N_MB0CF (sizeof(mb0cf) / sizeof(mb0cf[0]))
+
 #define NUM_TRIES 64
 #define NUM_READS 10
 
@@ -295,50 +339,6 @@ static void sdram_tr1_set(int ram_address, int* tr1_value)
 	*tr1_value = (first_good + last_bad) / 2;
 }
 
-
-#ifdef CONFIG_SDRAM_ECC
-static void ecc_init(ulong start, ulong size)
-{
-	ulong	current_addr;		/* current byte address */
-	ulong	end_addr;		/* end of memory region */
-	ulong	addr_inc;		/* address skip between writes */
-	ulong	cfg0_reg;		/* for restoring ECC state */
-
-	/*
-	 * TODO: Enable dcache before running this test (speedup)
-	 */
-
-	mfsdram(mem_cfg0, cfg0_reg);
-	mtsdram(mem_cfg0, (cfg0_reg & ~SDRAM_CFG0_MEMCHK) | SDRAM_CFG0_MEMCHK_GEN);
-
-	/*
-	 * look at geometry of SDRAM (data width) to determine whether we
-	 * can skip words when writing
-	 */
-	if ((cfg0_reg & SDRAM_CFG0_DRAMWDTH) == SDRAM_CFG0_DRAMWDTH_32)
-		addr_inc = 4;
-	else
-		addr_inc = 8;
-
-	current_addr = start;
-	end_addr = start + size;
-
-	while (current_addr < end_addr) {
-		*((ulong *)current_addr) = 0x00000000;
-		current_addr += addr_inc;
-	}
-
-	/*
-	 * TODO: Flush dcache and disable it again
-	 */
-
-	/*
-	 * Enable ecc checking and parity errors
-	 */
-	mtsdram(mem_cfg0, (cfg0_reg & ~SDRAM_CFG0_MEMCHK) | SDRAM_CFG0_MEMCHK_CHK);
-}
-#endif
-
 /*
  * Autodetect onboard DDR SDRAM on 440 platforms
  *
@@ -346,11 +346,20 @@ static void ecc_init(ulong start, ulong size)
  *	 so this should be extended for other future boards
  *	 using this routine!
  */
-long int initdram(int board_type)
+phys_size_t initdram(int board_type)
 {
 	int i;
 	int tr1_bank1;
 
+#if defined(CONFIG_440GX) || defined(CONFIG_440EP) || \
+    defined(CONFIG_440GR) || defined(CONFIG_440SP)
+	/*
+	 * Soft-reset SDRAM controller.
+	 */
+	mtsdr(sdr_srst, SDR0_SRST_DMC);
+	mtsdr(sdr_srst, 0x00000000);
+#endif
+
 	for (i=0; i<N_MB0CF; i++) {
 		/*
 		 * Disable memory controller.
@@ -370,9 +379,9 @@ long int initdram(int board_type)
 		 * Following for CAS Latency = 2.5 @ 133 MHz PLB
 		 */
 		mtsdram(mem_b0cr, mb0cf[i].reg);
-		mtsdram(mem_tr0, 0x41094012);
+		mtsdram(mem_tr0, CFG_SDRAM0_TR0);
 		mtsdram(mem_tr1, 0x80800800);	/* SS=T2 SL=STAGE 3 CD=1 CT=0x00*/
-		mtsdram(mem_rtr, 0x7e000000);	/* Interval 15.20µs @ 133MHz PLB*/
+		mtsdram(mem_rtr, 0x04100000);	/* Interval 7.8µs @ 133MHz PLB	*/
 		mtsdram(mem_cfg1, 0x00000000);	/* Self-refresh exit, disable PM*/
 		udelay(400);			/* Delay 200 usecs (min)	*/