1 files changed, 176 insertions, 140 deletions

diff --git a/cpu/mpc85xx/spd_sdram.c b/cpu/mpc85xx/spd_sdram.c
index ccd06e9..02b29ad 100644
--- a/cpu/mpc85xx/spd_sdram.c
+++ b/cpu/mpc85xx/spd_sdram.c
@@ -1,4 +1,5 @@
 /*
+ * Copyright 2004 Freescale Semiconductor.
  * (C) Copyright 2003 Motorola Inc.
  * Xianghua Xiao (X.Xiao@motorola.com)
  *
@@ -29,15 +30,7 @@
 
 #ifdef CONFIG_SPD_EEPROM
 
-#undef DEBUG
-
-#if defined(DEBUG)
-#define DEB(x)      x
-#else
-#define DEB(x)
-#endif
-
-#define ns2clk(ns) ((ns) / (2000000000 /get_bus_freq(0) + 1))
+#define ns2clk(ns) ((ns) / (2000000000 /get_bus_freq(0) + 1) + 1)
 
 long int spd_sdram(void) {
     	volatile immap_t *immap = (immap_t *)CFG_IMMR;
@@ -61,64 +54,62 @@ long int spd_sdram(void) {
 
 	ddr->cs0_bnds = ((spd.row_dens>>2) - 1);
 	ddr->cs0_config = ( 1<<31 | (spd.nrow_addr-12)<<8 | (spd.ncol_addr-8) );
-	DEB(printf("\n"));
-	DEB(printf("cs0_bnds = 0x%08x\n",ddr->cs0_bnds));
-	DEB(printf("cs0_config = 0x%08x\n",ddr->cs0_config));
+	debug ("\n");
+	debug ("cs0_bnds = 0x%08x\n",ddr->cs0_bnds);
+	debug ("cs0_config = 0x%08x\n",ddr->cs0_config);
 	if ( spd.nrows == 2 ) {
 		ddr->cs1_bnds = ((spd.row_dens<<14) | ((spd.row_dens>>1) - 1));
 		ddr->cs1_config = ( 1<<31 | (spd.nrow_addr-12)<<8 | (spd.ncol_addr-8) );
-		DEB(printf("cs1_bnds = 0x%08x\n",ddr->cs1_bnds));
-		DEB(printf("cs1_config = 0x%08x\n",ddr->cs1_config));
+		debug ("cs1_bnds = 0x%08x\n",ddr->cs1_bnds);
+		debug ("cs1_config = 0x%08x\n",ddr->cs1_config);
 	}
 
 	memsize = spd.nrows * (4 * spd.row_dens);
-	if( spd.mem_type == 0x07 ) {
-		printf("DDR module detected, total size:%dMB.\n",memsize);
-	} else {
+	if( spd.mem_type != 0x07 ) {
 		printf("No DDR module found!\n");
 		return 0;
 	}
 
-	switch(memsize) {
-		case 16:
-			tmp = 7;     /* TLB size */
-			tmp1 = 1;    /* TLB entry number */
-			tmp2 = 23;   /* Local Access Window size */
-			break;
-		case 32:
-			tmp = 7;
-			tmp1 = 2;
-			tmp2 = 24;
-			break;
-		case 64:
-			tmp = 8;
-			tmp1 = 1;
-			tmp2 = 25;
-			break;
-		case 128:
-			tmp = 8;
-			tmp1 = 2;
-			tmp2 = 26;
-			break;
-		case 256:
-			tmp = 9;
-			tmp1 = 1;
-			tmp2 = 27;
-			break;
-		case 512:
-			tmp = 9;
-			tmp1 = 2;
-			tmp2 = 28;
-			break;
-		case 1024:
-			tmp = 10;
-			tmp1 = 1;
-			tmp2 = 29;
-			break;
-		default:
-			printf("DDR:we only added support 16M,32M,64M,128M,256M,512M and 1G DDR I.\n");
-			return 0;
-			break;
+	switch (memsize) {
+	case 16:
+		tmp = 7;		/* TLB size */
+		tmp1 = 1;		/* TLB entry number */
+		tmp2 = 23;		/* Local Access Window size */
+		break;
+	case 32:
+		tmp = 7;
+		tmp1 = 2;
+		tmp2 = 24;
+		break;
+	case 64:
+		tmp = 8;
+		tmp1 = 1;
+		tmp2 = 25;
+		break;
+	case 128:
+		tmp = 8;
+		tmp1 = 2;
+		tmp2 = 26;
+		break;
+	case 256:
+		tmp = 9;
+		tmp1 = 1;
+		tmp2 = 27;
+		break;
+	case 512:
+		tmp = 9;
+		tmp1 = 2;
+		tmp2 = 28;
+		break;
+	case 1024:
+		tmp = 10;
+		tmp1 = 1;
+		tmp2 = 29;
+		break;
+	default:
+		printf ("DDR:we only added support 16M,32M,64M,128M,256M,512M and 1G DDR I.\n");
+		return 0;
+		break;
 	}
 
 	/* configure DDR TLB to TLB1 Entry 4,5 */
@@ -127,12 +118,12 @@ long int spd_sdram(void) {
 	mtspr(MAS2, TLB1_MAS2(((CFG_DDR_SDRAM_BASE>>12) & 0xfffff),0,0,0,0,0,0,0,0));
 	mtspr(MAS3, TLB1_MAS3(((CFG_DDR_SDRAM_BASE>>12) & 0xfffff),0,0,0,0,0,1,0,1,0,1));
 	asm volatile("isync;msync;tlbwe;isync");
-	DEB(printf("DDR:MAS0=0x%08x\n",TLB1_MAS0(1,4,0)));
-	DEB(printf("DDR:MAS1=0x%08x\n",TLB1_MAS1(1,1,0,0,tmp)));
-	DEB(printf("DDR:MAS2=0x%08x\n",TLB1_MAS2(((CFG_DDR_SDRAM_BASE>>12) \
-		& 0xfffff),0,0,0,0,0,0,0,0)));
-	DEB(printf("DDR:MAS3=0x%08x\n",TLB1_MAS3(((CFG_DDR_SDRAM_BASE>>12) \
-		& 0xfffff),0,0,0,0,0,1,0,1,0,1)));
+	debug ("DDR:MAS0=0x%08x\n",TLB1_MAS0(1,4,0));
+	debug ("DDR:MAS1=0x%08x\n",TLB1_MAS1(1,1,0,0,tmp));
+	debug ("DDR:MAS2=0x%08x\n",TLB1_MAS2(((CFG_DDR_SDRAM_BASE>>12) \
+		& 0xfffff),0,0,0,0,0,0,0,0));
+	debug ("DDR:MAS3=0x%08x\n",TLB1_MAS3(((CFG_DDR_SDRAM_BASE>>12) \
+		& 0xfffff),0,0,0,0,0,1,0,1,0,1));
 
 	if(tmp1 == 2) {
 		mtspr(MAS0, TLB1_MAS0(1,5,0));
@@ -142,28 +133,28 @@ long int spd_sdram(void) {
 		mtspr(MAS3, TLB1_MAS3((((CFG_DDR_SDRAM_BASE+(memsize*1024*1024)/2)>>12) \
 			& 0xfffff),0,0,0,0,0,1,0,1,0,1));
 		asm volatile("isync;msync;tlbwe;isync");
-		DEB(printf("DDR:MAS0=0x%08x\n",TLB1_MAS0(1,5,0)));
-		DEB(printf("DDR:MAS1=0x%08x\n",TLB1_MAS1(1,1,0,0,tmp)));
-		DEB(printf("DDR:MAS2=0x%08x\n",TLB1_MAS2((((CFG_DDR_SDRAM_BASE \
-			+(memsize*1024*1024)/2)>>12) & 0xfffff),0,0,0,0,0,0,0,0)));
-		DEB(printf("DDR:MAS3=0x%08x\n",TLB1_MAS3((((CFG_DDR_SDRAM_BASE \
-			+(memsize*1024*1024)/2)>>12) & 0xfffff),0,0,0,0,0,1,0,1,0,1)));
+		debug ("DDR:MAS0=0x%08x\n",TLB1_MAS0(1,5,0));
+		debug ("DDR:MAS1=0x%08x\n",TLB1_MAS1(1,1,0,0,tmp));
+		debug ("DDR:MAS2=0x%08x\n",TLB1_MAS2((((CFG_DDR_SDRAM_BASE \
+			+(memsize*1024*1024)/2)>>12) & 0xfffff),0,0,0,0,0,0,0,0));
+		debug ("DDR:MAS3=0x%08x\n",TLB1_MAS3((((CFG_DDR_SDRAM_BASE \
+			+(memsize*1024*1024)/2)>>12) & 0xfffff),0,0,0,0,0,1,0,1,0,1));
 	}
 
 #if defined(CONFIG_RAM_AS_FLASH)
 	ecm->lawbar2 = ((CFG_DDR_SDRAM_BASE>>12) & 0xfffff);
 	ecm->lawar2 = (LAWAR_EN | LAWAR_TRGT_IF_DDR | (LAWAR_SIZE & tmp2));
-	DEB(printf("DDR:LAWBAR2=0x%08x\n",ecm->lawbar2));
-	DEB(printf("DDR:LARAR2=0x%08x\n",ecm->lawar2));
+	debug ("DDR:LAWBAR2=0x%08x\n",ecm->lawbar2);
+	debug ("DDR:LARAR2=0x%08x\n",ecm->lawar2);
 #else
 	ecm->lawbar1 = ((CFG_DDR_SDRAM_BASE>>12) & 0xfffff);
 	ecm->lawar1 = (LAWAR_EN | LAWAR_TRGT_IF_DDR | (LAWAR_SIZE & tmp2));
-	DEB(printf("DDR:LAWBAR1=0x%08x\n",ecm->lawbar1));
-	DEB(printf("DDR:LARAR1=0x%08x\n",ecm->lawar1));
+	debug ("DDR:LAWBAR1=0x%08x\n",ecm->lawbar1);
+	debug ("DDR:LARAR1=0x%08x\n",ecm->lawar1);
 #endif
 
 	tmp = 20000/(((spd.clk_cycle & 0xF0) >> 4) * 10 + (spd.clk_cycle & 0x0f));
-	DEB(printf("DDR:Module maximum data rate is: %dMhz\n",tmp));
+	debug ("DDR:Module maximum data rate is: %dMhz\n",tmp);
 
 	/* find the largest CAS */
 	if(spd.cas_lat & 0x40) {
@@ -186,13 +177,16 @@ long int spd_sdram(void) {
 	}
 
 	tmp1 = get_bus_freq(0)/1000000;
-	if(tmp1<230 && tmp1>=90 && tmp>=230) {         /* 90~230 range, treated as DDR 200 */
+	if(tmp1<230 && tmp1>=90 && tmp>=230) {
+		/* 90~230 range, treated as DDR 200 */
 		if(spd.clk_cycle3 == 0xa0) caslat -= 2;
 		else if(spd.clk_cycle2 == 0xa0) caslat--;
-	} else if(tmp1<280 && tmp1>=230 && tmp>=280) { /* 230-280 range, treated as DDR 266 */
+	} else if(tmp1<280 && tmp1>=230 && tmp>=280) {
+		/* 230-280 range, treated as DDR 266 */
 		if(spd.clk_cycle3 == 0x75) caslat -= 2;
 		else if(spd.clk_cycle2 == 0x75) caslat--;
-	} else if(tmp1<350 && tmp1>=280 && tmp>=350) { /* 280~350 range, treated as DDR 333 */
+	} else if(tmp1<350 && tmp1>=280 && tmp>=350) {
+		/* 280~350 range, treated as DDR 333 */
 		if(spd.clk_cycle3 == 0x60) caslat -= 2;
 		else if(spd.clk_cycle2 == 0x60) caslat--;
 	} else if(tmp1<90 || tmp1 >=350) { /* DDR rate out-of-range */
@@ -200,9 +194,10 @@ long int spd_sdram(void) {
 		return 0;
 	}
 
-	/* note: caslat must also be programmed into ddr->sdram_mode register */
-	/* note: WRREC(Twr) and WRTORD(Twtr) are not in SPD,use conservative value here */
-#if 1
+	/* note: caslat must also be programmed into ddr->sdram_mode
+	   register */
+	/* note: WRREC(Twr) and WRTORD(Twtr) are not in SPD,use
+	   conservative value here */
 	ddr->timing_cfg_1 = 	(((ns2clk(spd.trp/4) & 0x07) << 28 ) | \
 				((ns2clk(spd.tras) & 0x0f ) << 24 ) | \
 				((ns2clk(spd.trcd/4) & 0x07) << 20 ) | \
@@ -210,72 +205,66 @@ long int spd_sdram(void) {
 				(((ns2clk(spd.sset[6]) - 8) & 0x0f) << 12 ) | \
 				( 0x300 ) | \
 				((ns2clk(spd.trrd/4) & 0x07) << 4) | 1);
-#else
-	ddr->timing_cfg_1 = 0x37344321;
-	caslat = 4;
-#endif
-	DEB(printf("DDR:timing_cfg_1=0x%08x\n",ddr->timing_cfg_1));
 
-	/* note: hand-coded value for timing_cfg_2, see Errata DDR1*/
-#if defined(CONFIG_MPC85xx_REV1)
+	debug ("DDR:timing_cfg_1=0x%08x\n",ddr->timing_cfg_1);
+
 	ddr->timing_cfg_2 = 0x00000800;
-#endif
-	DEB(printf("DDR:timing_cfg_2=0x%08x\n",ddr->timing_cfg_2));
+	debug ("DDR:timing_cfg_2=0x%08x\n",ddr->timing_cfg_2);
 
 	/* only DDR I is supported, DDR I and II have different mode-register-set definition */
 	/* burst length is always 4 */
 	switch(caslat) {
-		case 2:
-			ddr->sdram_mode = 0x52; /* 1.5 */
-			break;
-		case 3:
-			ddr->sdram_mode = 0x22; /* 2.0 */
-			break;
-		case 4:
-			ddr->sdram_mode = 0x62; /* 2.5 */
-			break;
-		case 5:
-			ddr->sdram_mode = 0x32; /* 3.0 */
-			break;
-		default:
-			printf("DDR:only CAS Latency 1.5,2.0,2.5,3.0 is supported.\n");
-			return 0;
+	case 2:
+		ddr->sdram_mode = 0x52; /* 1.5 */
+		break;
+	case 3:
+		ddr->sdram_mode = 0x22; /* 2.0 */
+		break;
+	case 4:
+		ddr->sdram_mode = 0x62; /* 2.5 */
+		break;
+	case 5:
+		ddr->sdram_mode = 0x32; /* 3.0 */
+		break;
+	default:
+		printf("DDR:only CAS Latency 1.5,2.0,2.5,3.0 is supported.\n");
+		return 0;
 	}
-	DEB(printf("DDR:sdram_mode=0x%08x\n",ddr->sdram_mode));
+	debug ("DDR:sdram_mode=0x%08x\n",ddr->sdram_mode);
 
 	switch(spd.refresh) {
-		case 0x00:
-		case 0x80:
-			tmp = ns2clk(15625);
-			break;
-		case 0x01:
-		case 0x81:
-			tmp = ns2clk(3900);
-			break;
-		case 0x02:
-		case 0x82:
-			tmp = ns2clk(7800);
-			break;
-		case 0x03:
-		case 0x83:
-			tmp = ns2clk(31300);
-			break;
-		case 0x04:
-		case 0x84:
-			tmp = ns2clk(62500);
-			break;
-		case 0x05:
-		case 0x85:
-			tmp = ns2clk(125000);
-			break;
-		default:
-			tmp = 0x512;
-			break;
+	case 0x00:
+	case 0x80:
+		tmp = ns2clk(15625);
+		break;
+	case 0x01:
+	case 0x81:
+		tmp = ns2clk(3900);
+		break;
+	case 0x02:
+	case 0x82:
+		tmp = ns2clk(7800);
+		break;
+	case 0x03:
+	case 0x83:
+		tmp = ns2clk(31300);
+		break;
+	case 0x04:
+	case 0x84:
+		tmp = ns2clk(62500);
+		break;
+	case 0x05:
+	case 0x85:
+		tmp = ns2clk(125000);
+		break;
+	default:
+		tmp = 0x512;
+		break;
 	}
 
 	/* set BSTOPRE to 0x100 for page mode, if auto-charge is used, set BSTOPRE = 0 */
 	ddr->sdram_interval = ((tmp & 0x3fff) << 16) | 0x100;
-	DEB(printf("DDR:sdram_interval=0x%08x\n",ddr->sdram_interval));
+	debug ("DDR:sdram_interval=0x%08x\n",ddr->sdram_interval);
 
 	/* is this an ECC DDR chip? */
 #if defined(CONFIG_DDR_ECC)
@@ -283,24 +272,71 @@ long int spd_sdram(void) {
 		ddr->err_disable = 0x0000000d;
 		ddr->err_sbe = 0x00ff0000;
 	}
-	DEB(printf("DDR:err_disable=0x%08x\n",ddr->err_disable));
-	DEB(printf("DDR:err_sbe=0x%08x\n",ddr->err_sbe));
+	debug ("DDR:err_disable=0x%08x\n",ddr->err_disable);
+	debug ("DDR:err_sbe=0x%08x\n",ddr->err_sbe);
 #endif
 	asm("sync;isync;msync");
 
 	udelay(500);
 
-	/* registered or unbuffered? */
+#ifdef MPC85xx_DDR_SDRAM_CLK_CNTL
+	/* Setup the clock control (8555 and later)
+	 * SDRAM_CLK_CNTL[0] = Source synchronous enable == 1
+	 * SDRAM_CLK_CNTL[5-7] = Clock Adjust == 3 (3/4 cycle late)
+	 */
+	ddr->sdram_clk_cntl = 0x83000000;
+#endif
+
+	/* Figure out the settings for the sdram_cfg register.  Build up
+	 * the entire register in 'tmp' before writing since the write into
+	 * the register will actually enable the memory controller, and all
+	 * settings must be done before enabling.
+	 *
+	 * sdram_cfg[0]   = 1 (ddr sdram logic enable)
+	 * sdram_cfg[1]   = 1 (self-refresh-enable)
+	 * sdram_cfg[6:7] = 2 (SDRAM type = DDR SDRAM)
+	 */
+	tmp = 0xc2000000;
+
+	/* sdram_cfg[3] = RD_EN - registered DIMM enable
+	 *   A value of 0x26 indicates micron registered DIMMS (micron.com)
+	 */
+	if (spd.mod_attr == 0x26) {
+		tmp |= 0x10000000;
+	}
+
 #if defined(CONFIG_DDR_ECC)
-	ddr->sdram_cfg = (spd.config == 0x02)?0x20000000:0x0;
+	/* If the user wanted ECC (enabled via sdram_cfg[2]) */
+	if (spd.config == 0x02) {
+		tmp |= 0x20000000;
+	}
+#endif
+
+
+	/*
+	 * REV1 uses 1T timing.
+	 * REV2 may use 1T or 2T as configured by the user.
+	 */
+	{
+		uint pvr = get_pvr();
+
+		if (pvr != PVR_85xx_REV1) {
+#if defined(CONFIG_DDR_2T_TIMING)
+			/*
+			 * Enable 2T timing by setting sdram_cfg[16].
+			 */
+			tmp |= 0x8000;
 #endif
-	ddr->sdram_cfg = 0xc2000000|((spd.mod_attr == 0x20) ? 0x0 : \
-		((spd.mod_attr == 0x26) ? 0x10000000:0x0));
+		}
+	}
+
+	ddr->sdram_cfg = tmp;
+
 	asm("sync;isync;msync");
 
 	udelay(500);
 
-	DEB(printf("DDR:sdram_cfg=0x%08x\n",ddr->sdram_cfg));
+	debug ("DDR:sdram_cfg=0x%08x\n",ddr->sdram_cfg);
 
     	return (memsize*1024*1024);
 }