Merge branch 'master' of /home/wd/git/u-boot/custodians

* 'master' of /home/wd/git/u-boot/custodians:
  fsl_lbc: add printout of LCRR and LBCR to local bus regs
  sbc8548: Fix up local bus init to be frequency aware
  sbc8548: enable support for hardware SPD errata workaround
  sbc8548: relocate fixed ddr init code to ddr.c file
  sbc8548: Make enabling SPD RAM configuration work
  sbc8548: Fix LBC SDRAM initialization settings
  sbc8548: enable ability to boot from alternate flash
  sbc8548: relocate 64MB user flash to sane boundary
  Revert "SBC8548: fix address mask to allow 64M flash"
  MPC85xxCDS: Fix missing LCRR_DBYP bits for 66-133MHz LBC
  eXMeritus HWW-1U-1A: Add support for the AT24C128N I2C EEPROM
  eXMeritus HWW-1U-1A: Minor environment variable tweaks

11 files changed, 393 insertions, 109 deletions

diff --git a/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c b/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c
index 587576b..023ac9a 100644
--- a/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c
+++ b/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c
@@ -28,6 +28,8 @@ void print_lbc_regs(void)
 		printf("BR%d\t0x%08X\tOR%d\t0x%08X\n",
 		       i, get_lbc_br(i), i, get_lbc_or(i));
 	}
+	printf("LBCR\t0x%08X\tLCRR\t0x%08X\n",
+		       get_lbc_lbcr(), get_lbc_lcrr());
 }
 
 void init_early_memctl_regs(void)
diff --git a/arch/powerpc/include/asm/fsl_lbc.h b/arch/powerpc/include/asm/fsl_lbc.h
index bf572b7..2a23d84 100644
--- a/arch/powerpc/include/asm/fsl_lbc.h
+++ b/arch/powerpc/include/asm/fsl_lbc.h
@@ -475,6 +475,8 @@ extern void init_early_memctl_regs(void);
 extern void upmconfig(uint upm, uint *table, uint size);
 
 #define LBC_BASE_ADDR ((fsl_lbc_t *)CONFIG_SYS_LBC_ADDR)
+#define get_lbc_lcrr() (in_be32(&(LBC_BASE_ADDR)->lcrr))
+#define get_lbc_lbcr() (in_be32(&(LBC_BASE_ADDR)->lbcr))
 #define get_lbc_br(i) (in_be32(&(LBC_BASE_ADDR)->bank[i].br))
 #define get_lbc_or(i) (in_be32(&(LBC_BASE_ADDR)->bank[i].or))
 #define set_lbc_br(i, v) (out_be32(&(LBC_BASE_ADDR)->bank[i].br, v))
diff --git a/board/freescale/mpc8541cds/mpc8541cds.c b/board/freescale/mpc8541cds/mpc8541cds.c
index d127137..532d32a 100644
--- a/board/freescale/mpc8541cds/mpc8541cds.c
+++ b/board/freescale/mpc8541cds/mpc8541cds.c
@@ -275,7 +275,7 @@ local_bus_init(void)
 		lbc->lcrr &= (~0x80000000);		/* DLL Enabled */
 
 	} else {
-		lbc->lcrr &= (~0x8000000);	/* DLL Enabled */
+		lbc->lcrr &= (~0x80000000);	/* DLL Enabled */
 		udelay(200);
 
 		/*
diff --git a/board/freescale/mpc8555cds/mpc8555cds.c b/board/freescale/mpc8555cds/mpc8555cds.c
index 48ede98..3361614 100644
--- a/board/freescale/mpc8555cds/mpc8555cds.c
+++ b/board/freescale/mpc8555cds/mpc8555cds.c
@@ -273,7 +273,7 @@ local_bus_init(void)
 		lbc->lcrr &= (~0x80000000);		/* DLL Enabled */
 
 	} else {
-		lbc->lcrr &= (~0x8000000);	/* DLL Enabled */
+		lbc->lcrr &= (~0x80000000);	/* DLL Enabled */
 		udelay(200);
 
 		/*
diff --git a/board/sbc8548/ddr.c b/board/sbc8548/ddr.c
index 996ffe2..45ec485 100644
--- a/board/sbc8548/ddr.c
+++ b/board/sbc8548/ddr.c
@@ -7,6 +7,7 @@
  */
 
 #include <common.h>
+#include <i2c.h>
 
 #include <asm/fsl_ddr_sdram.h>
 #include <asm/fsl_ddr_dimm_params.h>
@@ -54,3 +55,79 @@ void fsl_ddr_board_options(memctl_options_t *popts,
 	 */
 	popts->half_strength_driver_enable = 0;
 }
+
+#ifdef CONFIG_SPD_EEPROM
+/*
+ * Workaround for hardware errata.  An i2c address conflict
+ * existed on earlier boards; the workaround moved the DDR
+ * SPD from 0x51 to 0x53.  So we try and read 0x53 1st, and
+ * if that fails, then fall back to reading at 0x51.
+ */
+void get_spd(generic_spd_eeprom_t *spd, u8 i2c_address)
+{
+	int ret;
+
+#ifdef ALT_SPD_EEPROM_ADDRESS
+	if (i2c_address == SPD_EEPROM_ADDRESS) {
+		ret = i2c_read(ALT_SPD_EEPROM_ADDRESS, 0, 1, (uchar *)spd,
+				sizeof(generic_spd_eeprom_t));
+		if (ret == 0)
+			return;		/* Good data at 0x53 */
+		memset(spd, 0, sizeof(generic_spd_eeprom_t));
+	}
+#endif
+	ret = i2c_read(i2c_address, 0, 1, (uchar *)spd,
+				sizeof(generic_spd_eeprom_t));
+	if (ret) {
+		printf("DDR: failed to read SPD from addr %u\n", i2c_address);
+		memset(spd, 0, sizeof(generic_spd_eeprom_t));
+	}
+}
+
+#else
+/*
+ *  fixed_sdram init -- doesn't use serial presence detect.
+ *  Assumes 256MB DDR2 SDRAM SODIMM, without ECC, running at DDR400 speed.
+ */
+phys_size_t fixed_sdram(void)
+{
+	volatile ccsr_ddr_t *ddr = (void *)(CONFIG_SYS_MPC85xx_DDR_ADDR);
+
+	out_be32(&ddr->cs0_bnds,	0x0000007f);
+	out_be32(&ddr->cs1_bnds,	0x008000ff);
+	out_be32(&ddr->cs2_bnds,	0x00000000);
+	out_be32(&ddr->cs3_bnds,	0x00000000);
+
+	out_be32(&ddr->cs0_config,	0x80010101);
+	out_be32(&ddr->cs1_config,	0x80010101);
+	out_be32(&ddr->cs2_config,	0x00000000);
+	out_be32(&ddr->cs3_config,	0x00000000);
+
+	out_be32(&ddr->timing_cfg_3,	0x00000000);
+	out_be32(&ddr->timing_cfg_0,	0x00220802);
+	out_be32(&ddr->timing_cfg_1,	0x38377322);
+	out_be32(&ddr->timing_cfg_2,	0x0fa044C7);
+
+	out_be32(&ddr->sdram_cfg,	0x4300C000);
+	out_be32(&ddr->sdram_cfg_2,	0x24401000);
+
+	out_be32(&ddr->sdram_mode,	0x23C00542);
+	out_be32(&ddr->sdram_mode_2,	0x00000000);
+
+	out_be32(&ddr->sdram_interval,	0x05080100);
+	out_be32(&ddr->sdram_md_cntl,	0x00000000);
+	out_be32(&ddr->sdram_data_init,	0x00000000);
+	out_be32(&ddr->sdram_clk_cntl,	0x03800000);
+	asm("sync;isync;msync");
+	udelay(500);
+
+	#ifdef CONFIG_DDR_ECC
+	  /* Enable ECC checking */
+	  out_be32(&ddr->sdram_cfg, CONFIG_SYS_DDR_CONTROL | 0x20000000);
+	#else
+	  out_be32(&ddr->sdram_cfg, CONFIG_SYS_DDR_CONTROL);
+	#endif
+
+	return CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
+}
+#endif
diff --git a/board/sbc8548/law.c b/board/sbc8548/law.c
index 5fa9db0..322af76 100644
--- a/board/sbc8548/law.c
+++ b/board/sbc8548/law.c
@@ -36,22 +36,36 @@
  * 0xe000_0000	0xe000_ffff	CCSR			1M
  * 0xe200_0000	0xe27f_ffff	PCI1 IO			8M
  * 0xe280_0000	0xe2ff_ffff	PCIe IO			8M
+ * 0xec00_0000	0xefff_ffff	FLASH (2nd bank)	64M
  * 0xf000_0000	0xf7ff_ffff	SDRAM			128M
  * 0xf8b0_0000	0xf80f_ffff	EEPROM			1M
- * 0xfb80_0000	0xff7f_ffff	FLASH (2nd bank)	64M
  * 0xff80_0000	0xffff_ffff	FLASH (boot bank)	8M
  *
+ * If swapped CS0/CS6 via JP12+SW2.8:
+ * 0xef80_0000	0xefff_ffff	FLASH (2nd bank)	8M
+ * 0xfc00_0000	0xffff_ffff	FLASH (boot bank)	64M
+ *
  * Notes:
  *	CCSRBAR and L2-as-SRAM don't need a configured Local Access Window.
  *	If flash is 8M at default position (last 8M), no LAW needed.
  */
 
 struct law_entry law_table[] = {
+#ifdef CONFIG_SYS_ALT_BOOT
+	SET_LAW(CONFIG_SYS_ALT_FLASH, LAW_SIZE_8M, LAW_TRGT_IF_LBC),
+#else
+	SET_LAW(CONFIG_SYS_ALT_FLASH, LAW_SIZE_64M, LAW_TRGT_IF_LBC),
+#endif
 #ifndef CONFIG_SPD_EEPROM
 	SET_LAW(CONFIG_SYS_DDR_SDRAM_BASE, LAW_SIZE_256M, LAW_TRGT_IF_DDR),
 #endif
+#ifdef CONFIG_SYS_LBC_SDRAM_BASE
 	/* LBC window - maps 256M 0xf0000000 -> 0xffffffff */
 	SET_LAW(CONFIG_SYS_LBC_SDRAM_BASE, LAW_SIZE_256M, LAW_TRGT_IF_LBC),
+#else
+	/* LBC window - maps 128M 0xf8000000 -> 0xffffffff */
+	SET_LAW(CONFIG_SYS_EPLD_BASE, LAW_SIZE_128M, LAW_TRGT_IF_LBC),
+#endif
 };
 
 int num_law_entries = ARRAY_SIZE(law_table);
diff --git a/board/sbc8548/sbc8548.c b/board/sbc8548/sbc8548.c
index 26095a5..371d076 100644
--- a/board/sbc8548/sbc8548.c
+++ b/board/sbc8548/sbc8548.c
@@ -76,11 +76,15 @@ local_bus_init(void)
 	volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
 	volatile fsl_lbc_t *lbc = LBC_BASE_ADDR;
 
-	uint clkdiv;
+	uint clkdiv, lbc_mhz, lcrr = CONFIG_SYS_LBC_LCRR;
 	sys_info_t sysinfo;
 
 	get_sys_info(&sysinfo);
-	clkdiv = (in_be32(&lbc->lcrr) & LCRR_CLKDIV) * 2;
+
+	lbc_mhz = sysinfo.freqLocalBus / 1000000;
+	clkdiv = sysinfo.freqSystemBus / sysinfo.freqLocalBus;
+
+	debug("LCRR=0x%x, CD=%d, MHz=%d\n", lcrr, clkdiv, lbc_mhz);
 
 	out_be32(&gur->lbiuiplldcr1, 0x00078080);
 	if (clkdiv == 16) {
@@ -91,10 +95,38 @@ local_bus_init(void)
 		out_be32(&gur->lbiuiplldcr0, 0x5c0f1bf0);
 	}
 
-	setbits_be32(&lbc->lcrr, 0x00030000);
+	/*
+	 * Local Bus Clock > 83.3 MHz. According to timing
+	 * specifications set LCRR[EADC] to 2 delay cycles.
+	 */
+	if (lbc_mhz > 83) {
+		lcrr &= ~LCRR_EADC;
+		lcrr |= LCRR_EADC_2;
+	}
+
+	/*
+	 * According to MPC8548ERMAD Rev. 1.3, 13.3.1.16, 13-30
+	 * disable PLL bypass for Local Bus Clock > 83 MHz.
+	 */
+	if (lbc_mhz >= 66)
+		lcrr &= (~LCRR_DBYP);	/* DLL Enabled */
+
+	else
+		lcrr |= LCRR_DBYP;	/* DLL Bypass */
 
+	out_be32(&lbc->lcrr, lcrr);
 	asm("sync;isync;msync");
 
+	 /*
+	 * According to MPC8548ERMAD Rev.1.3 read back LCRR
+	 * and terminate with isync
+	 */
+	lcrr = in_be32(&lbc->lcrr);
+	asm ("isync;");
+
+	/* let DLL stabilize */
+	udelay(500);
+
 	out_be32(&lbc->ltesr, 0xffffffff);	/* Clear LBC error IRQs */
 	out_be32(&lbc->lteir, 0xffffffff);	/* Enable LBC error IRQs */
 }
@@ -107,13 +139,14 @@ void lbc_sdram_init(void)
 #if defined(CONFIG_SYS_LBC_SDRAM_SIZE)
 
 	uint idx;
+	const unsigned long size = CONFIG_SYS_LBC_SDRAM_SIZE * 1024 * 1024;
 	volatile fsl_lbc_t *lbc = LBC_BASE_ADDR;
 	uint *sdram_addr = (uint *)CONFIG_SYS_LBC_SDRAM_BASE;
-	uint lsdmr_common;
+	uint *sdram_addr2 = (uint *)(CONFIG_SYS_LBC_SDRAM_BASE + size/2);
 
 	puts("    SDRAM: ");
 
-	print_size (CONFIG_SYS_LBC_SDRAM_SIZE * 1024 * 1024, "\n");
+	print_size(size, "\n");
 
 	/*
 	 * Setup SDRAM Base and Option Registers
@@ -131,47 +164,49 @@ void lbc_sdram_init(void)
 	asm("msync");
 
 	/*
-	 * MPC8548 uses "new" 15-16 style addressing.
-	 */
-	lsdmr_common = CONFIG_SYS_LBC_LSDMR_COMMON;
-	lsdmr_common |= LSDMR_BSMA1516;
-
-	/*
 	 * Issue PRECHARGE ALL command.
 	 */
-	out_be32(&lbc->lsdmr, lsdmr_common | LSDMR_OP_PCHALL);
+	out_be32(&lbc->lsdmr, CONFIG_SYS_LBC_LSDMR_PCHALL);
 	asm("sync;msync");
 	*sdram_addr = 0xff;
 	ppcDcbf((unsigned long) sdram_addr);
+	*sdram_addr2 = 0xff;
+	ppcDcbf((unsigned long) sdram_addr2);
 	udelay(100);
 
 	/*
 	 * Issue 8 AUTO REFRESH commands.
 	 */
 	for (idx = 0; idx < 8; idx++) {
-		out_be32(&lbc->lsdmr, lsdmr_common | LSDMR_OP_ARFRSH);
+		out_be32(&lbc->lsdmr, CONFIG_SYS_LBC_LSDMR_ARFRSH);
 		asm("sync;msync");
 		*sdram_addr = 0xff;
 		ppcDcbf((unsigned long) sdram_addr);
+		*sdram_addr2 = 0xff;
+		ppcDcbf((unsigned long) sdram_addr2);
 		udelay(100);
 	}
 
 	/*
 	 * Issue 8 MODE-set command.
 	 */
-	out_be32(&lbc->lsdmr, lsdmr_common | LSDMR_OP_MRW);
+	out_be32(&lbc->lsdmr, CONFIG_SYS_LBC_LSDMR_MRW);
 	asm("sync;msync");
 	*sdram_addr = 0xff;
 	ppcDcbf((unsigned long) sdram_addr);
+	*sdram_addr2 = 0xff;
+	ppcDcbf((unsigned long) sdram_addr2);
 	udelay(100);
 
 	/*
-	 * Issue NORMAL OP command.
+	 * Issue RFEN command.
 	 */
-	out_be32(&lbc->lsdmr, lsdmr_common | LSDMR_OP_NORMAL);
+	out_be32(&lbc->lsdmr, CONFIG_SYS_LBC_LSDMR_RFEN);
 	asm("sync;msync");
 	*sdram_addr = 0xff;
 	ppcDcbf((unsigned long) sdram_addr);
+	*sdram_addr2 = 0xff;
+	ppcDcbf((unsigned long) sdram_addr2);
 	udelay(200);    /* Overkill. Must wait > 200 bus cycles */
 
 #endif	/* enable SDRAM init */
@@ -216,50 +251,6 @@ testdram(void)
 }
 #endif
 
-#if !defined(CONFIG_SPD_EEPROM)
-#define CONFIG_SYS_DDR_CONTROL 0xc300c000
-/*************************************************************************
- *  fixed_sdram init -- doesn't use serial presence detect.
- *  assumes 256MB DDR2 SDRAM SODIMM, without ECC, running at DDR400 speed.
- ************************************************************************/
-phys_size_t fixed_sdram(void)
-{
-	volatile ccsr_ddr_t *ddr = (void *)(CONFIG_SYS_MPC85xx_DDR_ADDR);
-
-	out_be32(&ddr->cs0_bnds, 0x0000007f);
-	out_be32(&ddr->cs1_bnds, 0x008000ff);
-	out_be32(&ddr->cs2_bnds, 0x00000000);
-	out_be32(&ddr->cs3_bnds, 0x00000000);
-	out_be32(&ddr->cs0_config, 0x80010101);
-	out_be32(&ddr->cs1_config, 0x80010101);
-	out_be32(&ddr->cs2_config, 0x00000000);
-	out_be32(&ddr->cs3_config, 0x00000000);
-	out_be32(&ddr->timing_cfg_3, 0x00000000);
-	out_be32(&ddr->timing_cfg_0, 0x00220802);
-	out_be32(&ddr->timing_cfg_1, 0x38377322);
-	out_be32(&ddr->timing_cfg_2, 0x0fa044C7);
-	out_be32(&ddr->sdram_cfg, 0x4300C000);
-	out_be32(&ddr->sdram_cfg_2, 0x24401000);
-	out_be32(&ddr->sdram_mode, 0x23C00542);
-	out_be32(&ddr->sdram_mode_2, 0x00000000);
-	out_be32(&ddr->sdram_interval, 0x05080100);
-	out_be32(&ddr->sdram_md_cntl, 0x00000000);
-	out_be32(&ddr->sdram_data_init, 0x00000000);
-	out_be32(&ddr->sdram_clk_cntl, 0x03800000);
-	asm("sync;isync;msync");
-	udelay(500);
-
-	#if defined (CONFIG_DDR_ECC)
-	  /* Enable ECC checking */
-	  out_be32(&ddr->sdram_cfg, CONFIG_SYS_DDR_CONTROL | 0x20000000);
-	#else
-	  out_be32(&ddr->sdram_cfg, CONFIG_SYS_DDR_CONTROL);
-	#endif
-
-	return CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
-}
-#endif
-
 #ifdef CONFIG_PCI1
 static struct pci_controller pci1_hose;
 #endif	/* CONFIG_PCI1 */
diff --git a/board/sbc8548/tlb.c b/board/sbc8548/tlb.c
index bb4c052..af927f1 100644
--- a/board/sbc8548/tlb.c
+++ b/board/sbc8548/tlb.c
@@ -46,12 +46,14 @@ struct fsl_e_tlb_entry tlb_table[] = {
 
 	/*
 	 * TLB 0:	64M	Non-cacheable, guarded
-	 * 0xfc000000	56M	8MB -> 64MB of user flash
+	 * 0xfc000000	56M	unused
 	 * 0xff800000	8M	boot FLASH
+	 *	.... or ....
+	 * 0xfc000000	64M	user flash
+	 *
 	 * Out of reset this entry is only 4K.
 	 */
-	SET_TLB_ENTRY(1, CONFIG_SYS_ALT_FLASH + 0x800000,
-		      CONFIG_SYS_ALT_FLASH + 0x800000,
+	SET_TLB_ENTRY(1, 0xfc000000, 0xfc000000,
 		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
 		      0, 0, BOOKE_PAGESZ_64M, 1),
 
@@ -74,6 +76,7 @@ struct fsl_e_tlb_entry tlb_table[] = {
 		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
 		      0, 2, BOOKE_PAGESZ_64M, 1),
 
+#ifdef CONFIG_SYS_LBC_SDRAM_BASE
 	/*
 	 * TLB 3:	64M	Cacheable, non-guarded
 	 * 0xf0000000	64M	LBC SDRAM First half
@@ -90,6 +93,7 @@ struct fsl_e_tlb_entry tlb_table[] = {
 		      CONFIG_SYS_LBC_SDRAM_BASE + 0x4000000,
 		      MAS3_SX|MAS3_SW|MAS3_SR, 0,
 		      0, 4, BOOKE_PAGESZ_64M, 1),
+#endif
 
 	/*
 	 * TLB 5:	16M	Cacheable, non-guarded
@@ -102,9 +106,18 @@ struct fsl_e_tlb_entry tlb_table[] = {
 		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
 		      0, 5, BOOKE_PAGESZ_16M, 1),
 
+#ifndef CONFIG_SYS_ALT_BOOT
+	/*
+	 * TLB 6:	64M	Non-cacheable, guarded
+	 * 0xec000000	64M	64MB user FLASH
+	 */
+	SET_TLB_ENTRY(1, CONFIG_SYS_ALT_FLASH, CONFIG_SYS_ALT_FLASH,
+		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
+		      0, 6, BOOKE_PAGESZ_64M, 1),
+#else
 	/*
 	 * TLB 6:	4M	Non-cacheable, guarded
-	 * 0xfb800000	4M	1st 4MB block of 64MB user FLASH
+	 * 0xef800000	4M	1st 1/2 8MB soldered FLASH
 	 */
 	SET_TLB_ENTRY(1, CONFIG_SYS_ALT_FLASH, CONFIG_SYS_ALT_FLASH,
 		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
@@ -112,12 +125,13 @@ struct fsl_e_tlb_entry tlb_table[] = {
 
 	/*
 	 * TLB 7:	4M	Non-cacheable, guarded
-	 * 0xfbc00000	4M	2nd 4MB block of 64MB user FLASH
+	 * 0xefc00000	4M	2nd half 8MB soldered FLASH
 	 */
 	SET_TLB_ENTRY(1, CONFIG_SYS_ALT_FLASH + 0x400000,
 		      CONFIG_SYS_ALT_FLASH + 0x400000,
 		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
 		      0, 7, BOOKE_PAGESZ_4M, 1),
+#endif
 
 };
 
diff --git a/doc/README.sbc8548 b/doc/README.sbc8548
index 6cbe12f..0f3f543 100644
--- a/doc/README.sbc8548
+++ b/doc/README.sbc8548
@@ -62,6 +62,43 @@ a 33MHz PCI configuration is currently untested.)
     02.00.00   0x1148     0x9e00     Network controller      0x00
     =>
 
+Memory Size and using SPD:
+==========================
+
+The default configuration uses hard coded memory configuration settings
+for 256MB of DDR2 @400MHz.  It does not by default use the DDR2 SPD
+EEPROM data to read what memory is installed.
+
+There is a hardware errata, which causes the older local bus SDRAM
+SPD EEPROM to land at the same address as the DDR2 SPD EEPROM, so
+that the SPD data can not be read reliably.  You can test if your
+board has the errata fix by running "i2c probe".  If you see 0x53
+as a valid device, it has been fixed.  If you only see 0x50, 0x51
+then your board does not have the fix.
+
+You can also visually inspect the board to see if this hardware
+fix has been applied:
+
+      1) Remove R314 (RES-R0174-033, 1K, 0603). R314 is located on
+         the back of the PCB behind the DDR SDRAM SODIMM connector.
+      2) Solder RES-R0174-033 (1K, 0603) resistor from R314 pin 2 pad
+         to R313 pin 2.  Pin 2 for each resistor is the end of the
+         resistor closest to the CPU.
+
+Boards without the mod will have R314 and R313 in parallel, like "||".
+After the mod, they will be touching and form an "L" shape.
+
+If you want to upgrade to larger RAM size, you can simply enable
+	#define CONFIG_SPD_EEPROM
+	#define CONFIG_DDR_SPD
+in include/configs/sbc8548.h file.  (The lines are already there
+but listed as #undef).
+
+If you did the i2c test, and your board does not have the errata
+fix, then you will have to physically remove the LBC 128MB DIMM
+from the board's socket to resolve the above i2c address overlap
+issue and allow SPD autodetection of RAM to work.
+
 
 Updating U-boot with U-boot:
 ============================
@@ -86,6 +123,33 @@ The "md" steps in the above are just a precautionary step that allow
 you to confirm the u-boot version that was downloaded, and then confirm
 that it was copied to flash.
 
+The above assumes that you are using the default board settings which
+have u-boot in the 8MB flash, tied to /CS0.
+
+If you are running the default 8MB /CS0 settings but want to store an
+image in the SODIMM that is built with CONFIG_SYS_ALT_BOOT enabled,
+(as a backup, etc) then the steps will become:
+
+	tftp u-boot.bin
+	md 200000 10
+	protect off all
+	era eff00000 efffffff
+	cp.b 200000 eff00000 100000
+	md eff00000 10
+	protect on all
+
+Finally, if you are running the alternate 64MB /CS0 settings and want
+to update the in-use u-boot image, then (again with CONFIG_SYS_ALT_BOOT
+enabled) the steps will become:
+
+	tftp u-boot.bin
+	md 200000 10
+	protect off all
+	era fff00000 ffffffff
+	cp.b 200000 fff00000 100000
+	md fff00000 10
+	protect on all
+
 
 Hardware Reference:
 ===================
@@ -100,6 +164,9 @@ Boot flash:
 
 Sodimm flash:
 	intel V28F128Jx, 16384x8 (4 devices) at 0xfb80_0000
+	Note that this address reflects the default setting for
+	the JTAG debugging tools, but since the alignment is
+	rather inconvenient, u-boot puts it at 0xec00_0000.
 
 
 	Jumpers:
@@ -124,10 +191,9 @@ JP19		PCI mode	PCI		PCI-X
 onto /CS0 and the SODIMM flash on /CS6 (default).  When JP12
 is jumpered parallel to the LBC-SDRAM, then /CS0 is for the
 SODIMM flash and /CS6 is for the boot flash.  Note that in this
-alternate setting, you also need to switch SW2.8 to ON.  Currently
-u-boot doesn't support booting off the SODIMM in this alternate
-setting without manually altering BR0/OR0 and BR6/OR6 in the
-board config file appropriately.
+alternate setting, you also need to switch SW2.8 to ON.
+See the setting CONFIG_SYS_ALT_BOOT if you want to use this setting
+and boot u-boot from the 64MB SODIMM
 
 
 	Switches:
@@ -187,9 +253,12 @@ start		end		CS<n>	width	Desc.
 0000_0000	0fff_ffff	MCS0,1	64	DDR2 (256MB)
 f000_0000	f7ff_ffff	CS3,4	32	LB SDRAM (128MB)
 f800_0000	f8b0_1fff	CS5	-	EPLD
-fb80_0000	ff7f_ffff	CS6	32	SODIMM flash (64MB)
+fb80_0000	ff7f_ffff	CS6	32	SODIMM flash (64MB) [*]
 ff80_0000	ffff_ffff	CS0	8	Boot flash (8MB)
 
+[*] fb80 represents the default programmed by WR JTAG register files,
+    but u-boot places the flash at either ec00 or fc00 based on JP12.
+
 The EPLD on CS5 demuxes the following devices at the following offsets:
 
 offset		size	width	device
diff --git a/include/configs/HWW1U1A.h b/include/configs/HWW1U1A.h
index c7a835b..01597b9 100644
--- a/include/configs/HWW1U1A.h
+++ b/include/configs/HWW1U1A.h
@@ -240,7 +240,29 @@
 /* Turn off RTC square-wave output to save battery */
 #define CONFIG_SYS_RTC_DS1337_NOOSC
 
-/* PCA9554 is at I2C1-0x3f (I know it says "PCA953X", it's a PCA9554) */
+/*
+ * AT24C128N EEPROM at I2C0-0x53.
+ *
+ * That Atmel EEPROM has 128kbit of memory (16kByte) divided into 256 pages
+ * of 64 bytes per page.  The chip uses 2-byte addresses and has a max write
+ * cycle time of 20ms according to the datasheet.
+ *
+ * NOTE: Our environment is stored on regular direct-attached FLASH, this
+ * chip is only used as a write-protected backup for certain key settings
+ * such as the serial# and macaddr values.  (EG: "env import")
+ */
+#define CONFIG_CMD_EEPROM
+#define CONFIG_ENV_EEPROM_IS_ON_I2C
+#define CONFIG_SYS_I2C_EEPROM_ADDR 0x53
+#define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 2
+#define CONFIG_SYS_EEPROM_PAGE_WRITE_BITS 6 /* 1 << 6 == 64 byte pages */
+#define CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS 21
+
+/*
+ * PCA9554 is at I2C1-0x3f (I know it says "PCA953X", it's a PCA9554).  You
+ * must first select the I2C1 bus with "i2c dev 1" or the "pca953x" command
+ * will not be able to access the chip.
+ */
 #define CONFIG_PCA953X
 #define CONFIG_CMD_PCA953X
 #define CONFIG_CMD_PCA953X_INFO
@@ -438,14 +460,20 @@ const char *hww1u1a_get_ps1(void);
 
 /* Extra environment parameters */
 #define CONFIG_EXTRA_ENV_SETTINGS					\
-	"preboot=setenv bootargs \"${bootargs} "CONFIG_BOOTARGS_DYNAMIC"\"\0" \
+	"ethprime=e1000#0\0"						\
+	"ethrotate=no\0"						\
+	"setbootargs=setenv bootargs "					\
+			"\"${bootargs} "CONFIG_BOOTARGS_DYNAMIC"\"\0"	\
 	"perf_mode=performance\0"					\
 	"hwconfig="	"fsl_ddr:ctlr_intlv=bank,bank_intlv=cs0_cs1;"	\
 			"usb1:dr_mode=host,phy_type=ulpi\0"		\
-	"flkernel=0xe8020000\0"						\
+	"flkernel=0xe8000000\0"						\
 	"flinitramfs=0xe8800000\0"					\
 	"fldevicetree=0xeff20000\0"					\
 	"flbootm=bootm ${flkernel} ${flinitramfs} ${fldevicetree}\0"	\
-	"flboot=run preboot; run flbootm\0"
+	"flboot=run preboot; run flbootm\0"				\
+	"restore_eeprom=i2c dev 0 && "					\
+			"eeprom read $loadaddr 0x0000 0x2000 && "	\
+			"env import -c $loadaddr 0x2000\0"
 
 #endif	/* __CONFIG_H */
diff --git a/include/configs/sbc8548.h b/include/configs/sbc8548.h
index ba7612c..d87394c 100644
--- a/include/configs/sbc8548.h
+++ b/include/configs/sbc8548.h
@@ -57,9 +57,19 @@
 #define CONFIG_MPC8548		1	/* MPC8548 specific */
 #define CONFIG_SBC8548		1	/* SBC8548 board specific */
 
+/*
+ * If you want to boot from the SODIMM flash, instead of the soldered
+ * on flash, set this, and change JP12, SW2:8 accordingly.
+ */
+#undef CONFIG_SYS_ALT_BOOT
+
 #ifndef CONFIG_SYS_TEXT_BASE
+#ifdef CONFIG_SYS_ALT_BOOT
+#define CONFIG_SYS_TEXT_BASE	0xfff00000
+#else
 #define CONFIG_SYS_TEXT_BASE	0xfffa0000
 #endif
+#endif
 
 #undef CONFIG_RIO
 
@@ -109,9 +119,17 @@
 /* DDR Setup */
 #define CONFIG_FSL_DDR2
 #undef CONFIG_FSL_DDR_INTERACTIVE
+#undef CONFIG_DDR_ECC			/* only for ECC DDR module */
+/*
+ * A hardware errata caused the LBC SDRAM SPD and the DDR2 SPD
+ * to collide, meaning you couldn't reliably read either. So
+ * physically remove the LBC PC100 SDRAM module from the board
+ * before enabling the two SPD options below, or check that you
+ * have the hardware fix on your board via "i2c probe" and looking
+ * for a device at 0x53.
+ */
 #undef CONFIG_SPD_EEPROM		/* Use SPD EEPROM for DDR setup */
 #undef CONFIG_DDR_SPD
-#undef CONFIG_DDR_ECC			/* only for ECC DDR module */
 
 #define CONFIG_ECC_INIT_VIA_DDRCONTROLLER	/* DDR controller or DMA? */
 #define CONFIG_MEM_INIT_VALUE	0xDeadBeef
@@ -124,14 +142,20 @@
 #define CONFIG_DIMM_SLOTS_PER_CTLR	1
 #define CONFIG_CHIP_SELECTS_PER_CTRL	2
 
-/* I2C addresses of SPD EEPROMs */
+/*
+ * The hardware fix for the I2C address collision puts the DDR
+ * SPD at 0x53, but if we are running on an older board w/o the
+ * fix, it will still be at 0x51.  We check 0x53 1st.
+ */
 #define SPD_EEPROM_ADDRESS	0x51	/* CTLR 0 DIMM 0 */
+#define ALT_SPD_EEPROM_ADDRESS	0x53	/* CTLR 0 DIMM 0 */
 
 /*
  * Make sure required options are set
  */
 #ifndef CONFIG_SPD_EEPROM
 	#define CONFIG_SYS_SDRAM_SIZE	256		/* DDR is 256MB */
+	#define CONFIG_SYS_DDR_CONTROL	0xc300c000
 #endif
 
 #undef CONFIG_CLOCKS_IN_MHZ
@@ -139,28 +163,54 @@
 /*
  * FLASH on the Local Bus
  * Two banks, one 8MB the other 64MB, using the CFI driver.
- * Boot from BR0/OR0 bank at 0xff80_0000
- * Alternate BR6/OR6 bank at 0xfb80_0000
+ * JP12+SW2.8 are used to swap CS0 and CS6, defaults are to have
+ * CS0 the 8MB boot flash, and CS6 the 64MB flash.
+ *
+ *	Default:
+ *	ec00_0000	efff_ffff	64MB SODIMM
+ *	ff80_0000	ffff_ffff	8MB soldered flash
+ *
+ *	Alternate:
+ *	ef80_0000	efff_ffff	8MB soldered flash
+ *	fc00_0000	ffff_ffff	64MB SODIMM
  *
- * BR0:
+ * BR0_8M:
  *    Base address 0 = 0xff80_0000 = BR0[0:16] = 1111 1111 1000 0000 0
  *    Port Size = 8 bits = BRx[19:20] = 01
  *    Use GPCM = BRx[24:26] = 000
  *    Valid = BRx[31] = 1
  *
- * 0    4    8    12   16   20   24   28
- * 1111 1111 1000 0000 0000 1000 0000 0001 = ff800801    BR0
- *
- * BR6:
- *    Base address 6 = 0xfb80_0000 = BR6[0:16] = 1111 1011 1000 0000 0
+ * BR0_64M:
+ *    Base address 0 = 0xfc00_0000 = BR0[0:16] = 1111 1100 0000 0000 0
  *    Port Size = 32 bits = BRx[19:20] = 11
+ *
+ * 0    4    8    12   16   20   24   28
+ * 1111 1111 1000 0000 0000 1000 0000 0001 = ff800801    BR0_8M
+ * 1111 1100 0000 0000 0001 1000 0000 0001 = fc001801    BR0_64M
+ */
+#define CONFIG_SYS_BR0_8M	0xff800801
+#define CONFIG_SYS_BR0_64M	0xfc001801
+
+/*
+ * BR6_8M:
+ *    Base address 6 = 0xef80_0000 = BR6[0:16] = 1110 1111 1000 0000 0
+ *    Port Size = 8 bits = BRx[19:20] = 01
  *    Use GPCM = BRx[24:26] = 000
  *    Valid = BRx[31] = 1
+
+ * BR6_64M:
+ *    Base address 6 = 0xec00_0000 = BR6[0:16] = 1110 1100 0000 0000 0
+ *    Port Size = 32 bits = BRx[19:20] = 11
  *
  * 0    4    8    12   16   20   24   28
- * 1111 1011 1000 0000 0001 1000 0000 0001 = fb801801    BR6
- *
- * OR0:
+ * 1110 1111 1000 0000 0000 1000 0000 0001 = ef800801    BR6_8M
+ * 1110 1100 0000 0000 0001 1000 0000 0001 = ec001801    BR6_64M
+ */
+#define CONFIG_SYS_BR6_8M	0xef800801
+#define CONFIG_SYS_BR6_64M	0xec001801
+
+/*
+ * OR0_8M:
  *    Addr Mask = 8M = OR1[0:16] = 1111 1111 1000 0000 0
  *    XAM = OR0[17:18] = 11
  *    CSNT = OR0[20] = 1
@@ -169,11 +219,20 @@
  *    TRLX = use relaxed timing = OR0[29] = 1
  *    EAD = use external address latch delay = OR0[31] = 1
  *
- * 0    4    8    12   16   20   24   28
- * 1111 1111 1000 0000 0110 1110 0110 0101 = ff806e65    OR0
+ * OR0_64M:
+ *    Addr Mask = 64M = OR1[0:16] = 1111 1100 0000 0000 0
+ *
  *
- * OR6:
- *    Addr Mask = 64M = OR6[0:16] = 1111 1000 0000 0000 0
+ * 0    4    8    12   16   20   24   28
+ * 1111 1111 1000 0000 0110 1110 0110 0101 = ff806e65    OR0_8M
+ * 1111 1100 0000 0000 0110 1110 0110 0101 = fc006e65    OR0_64M
+ */
+#define CONFIG_SYS_OR0_8M	0xff806e65
+#define CONFIG_SYS_OR0_64M	0xfc006e65
+
+/*
+ * OR6_8M:
+ *    Addr Mask = 8M = OR6[0:16] = 1111 1111 1000 0000 0
  *    XAM = OR6[17:18] = 11
  *    CSNT = OR6[20] = 1
  *    ACS = half cycle delay = OR6[21:22] = 11
@@ -181,20 +240,37 @@
  *    TRLX = use relaxed timing = OR6[29] = 1
  *    EAD = use external address latch delay = OR6[31] = 1
  *
+ * OR6_64M:
+ *    Addr Mask = 64M = OR6[0:16] = 1111 1100 0000 0000 0
+ *
  * 0    4    8    12   16   20   24   28
- * 1111 1000 0000 0000 0110 1110 0110 0101 = f8006e65    OR6
+ * 1111 1111 1000 0000 0110 1110 0110 0101 = ff806e65    OR6_8M
+ * 1111 1100 0000 0000 0110 1110 0110 0101 = fc006e65    OR6_64M
  */
+#define CONFIG_SYS_OR6_8M	0xff806e65
+#define CONFIG_SYS_OR6_64M	0xfc006e65
 
+#ifndef CONFIG_SYS_ALT_BOOT		/* JP12 in default position */
 #define CONFIG_SYS_BOOT_BLOCK		0xff800000	/* start of 8MB Flash */
-#define CONFIG_SYS_ALT_FLASH		0xfb800000	/* 64MB "user" flash */
-#define CONFIG_SYS_FLASH_BASE		CONFIG_SYS_BOOT_BLOCK	/* start of FLASH 16M */
+#define CONFIG_SYS_ALT_FLASH		0xec000000	/* 64MB "user" flash */
 
-#define CONFIG_SYS_BR0_PRELIM		0xff800801
-#define CONFIG_SYS_BR6_PRELIM		0xfb801801
+#define CONFIG_SYS_BR0_PRELIM		CONFIG_SYS_BR0_8M
+#define CONFIG_SYS_OR0_PRELIM		CONFIG_SYS_OR0_8M
 
-#define	CONFIG_SYS_OR0_PRELIM		0xff806e65
-#define	CONFIG_SYS_OR6_PRELIM		0xf8006e65
+#define CONFIG_SYS_BR6_PRELIM		CONFIG_SYS_BR6_64M
+#define CONFIG_SYS_OR6_PRELIM		CONFIG_SYS_OR6_64M
+#else					/* JP12 in alternate position */
+#define CONFIG_SYS_BOOT_BLOCK		0xfc000000	/* start 64MB Flash */
+#define CONFIG_SYS_ALT_FLASH		0xef800000	/* 8MB soldered flash */
 
+#define CONFIG_SYS_BR0_PRELIM		CONFIG_SYS_BR0_64M
+#define CONFIG_SYS_OR0_PRELIM		CONFIG_SYS_OR0_64M
+
+#define CONFIG_SYS_BR6_PRELIM		CONFIG_SYS_BR6_8M
+#define CONFIG_SYS_OR6_PRELIM		CONFIG_SYS_OR6_8M
+#endif
+
+#define CONFIG_SYS_FLASH_BASE		CONFIG_SYS_BOOT_BLOCK
 #define CONFIG_SYS_FLASH_BANKS_LIST	{CONFIG_SYS_FLASH_BASE, \
 					 CONFIG_SYS_ALT_FLASH}
 #define CONFIG_SYS_MAX_FLASH_BANKS	2		/* number of banks */
@@ -221,6 +297,10 @@
 
 /*
  * SDRAM on the Local Bus (CS3 and CS4)
+ * Note that most boards have a hardware errata where both the
+ * LBC SDRAM and the DDR2 SDRAM decode at 0x51, making it impossible
+ * to use CONFIG_DDR_SPD unless you physically remove the LBC DIMM.
+ * A hardware workaround is also available, see README.sbc8548 file.
  */
 #define CONFIG_SYS_LBC_SDRAM_BASE	0xf0000000	/* Localbus SDRAM */
 #define CONFIG_SYS_LBC_SDRAM_SIZE	128		/* LBC SDRAM is 128MB */
@@ -300,19 +380,26 @@
 
 /*
  * Common settings for all Local Bus SDRAM commands.
- * At run time, either BSMA1516 (for CPU 1.1)
- *                  or BSMA1617 (for CPU 1.0) (old)
- * is OR'ed in too.
  */
 #define CONFIG_SYS_LBC_LSDMR_COMMON	( LSDMR_RFCR16		\
-				| LSDMR_PRETOACT7	\
-				| LSDMR_ACTTORW7	\
+				| LSDMR_BSMA1516	\
+				| LSDMR_PRETOACT3	\
+				| LSDMR_ACTTORW3	\
+				| LSDMR_BUFCMD		\
 				| LSDMR_BL8		\
-				| LSDMR_WRC4		\
+				| LSDMR_WRC2		\
 				| LSDMR_CL3		\
-				| LSDMR_RFEN		\
 				)
 
+#define CONFIG_SYS_LBC_LSDMR_PCHALL	\
+	 (CONFIG_SYS_LBC_LSDMR_COMMON | LSDMR_OP_PCHALL)
+#define CONFIG_SYS_LBC_LSDMR_ARFRSH	\
+	 (CONFIG_SYS_LBC_LSDMR_COMMON | LSDMR_OP_ARFRSH)
+#define CONFIG_SYS_LBC_LSDMR_MRW	\
+	 (CONFIG_SYS_LBC_LSDMR_COMMON | LSDMR_OP_MRW)
+#define CONFIG_SYS_LBC_LSDMR_RFEN	\
+	 (CONFIG_SYS_LBC_LSDMR_COMMON | LSDMR_RFEN)
+
 #define CONFIG_SYS_INIT_RAM_LOCK	1
 #define CONFIG_SYS_INIT_RAM_ADDR	0xe4010000	/* Initial RAM address */
 #define CONFIG_SYS_INIT_RAM_SIZE	0x4000		/* Size of used area in RAM */
@@ -330,7 +417,7 @@
  * thing for MONITOR_LEN in both cases.
  */
 #define CONFIG_SYS_MONITOR_LEN		(~CONFIG_SYS_TEXT_BASE + 1)
-#define CONFIG_SYS_MALLOC_LEN		(128 * 1024)	/* Reserved for malloc */
+#define CONFIG_SYS_MALLOC_LEN		(1024 * 1024) /* Reserved for malloc */
 
 /* Serial Port */
 #define CONFIG_CONS_INDEX	1