* Some Cleanup.

* Patch by Richard Woodruff, 10 Jan 2005:
  Update support for OMAP2420 (ARM11) and H4 board:
  o clean up and add new types to H4 memory probe code.
  o fix to work with internal boot.
  o added PRCM config III operation.
  o fix marginal flash timings.
  o add revison ATAG usage.
  o enable voltage scaling at power chip.
  o fix compile error for i2c.

* Fix network problem (error when receiving multiple ARP packets)

6 files changed, 310 insertions, 178 deletions

diff --git a/board/omap2420h4/config.mk b/board/omap2420h4/config.mk
index 4f14be84428..f2a533e0354 100644
--- a/board/omap2420h4/config.mk
+++ b/board/omap2420h4/config.mk
@@ -14,12 +14,10 @@
 # (mem base + reserved)
 
 # For use with external or internal boots.
-# CONFIG_PARTIAL_SRAM must be defined to use this.
 TEXT_BASE = 0x80e80000
 
 # Used with full SRAM boot.
 # This is either with a GP system or a signed boot image.
 # easiest, and safest way to go if you can.
-# Comment out CONFIG_PARTIAL_SRAM for this one.
-#
 #TEXT_BASE = 0x40280000
+
diff --git a/board/omap2420h4/flash.c b/board/omap2420h4/flash.c
index 3b6a69f57bc..d5e106a5ea6 100644
--- a/board/omap2420h4/flash.c
+++ b/board/omap2420h4/flash.c
@@ -119,6 +119,7 @@ unsigned long flash_init (void)
 		size += flash_info[i].size;
 	}
 
+#ifdef CFG_ENV_IS_IN_FLASH
 	/* Protect monitor and environment sectors
 	 */
 	flash_protect (FLAG_PROTECT_SET,
@@ -128,7 +129,7 @@ unsigned long flash_init (void)
 	flash_protect (FLAG_PROTECT_SET,
 				   CFG_ENV_ADDR,
 				   CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
-
+#endif
 	return size;
 }
 
diff --git a/board/omap2420h4/mem.c b/board/omap2420h4/mem.c
index 5e23d61308d..3ce38cc4d48 100644
--- a/board/omap2420h4/mem.c
+++ b/board/omap2420h4/mem.c
@@ -38,9 +38,8 @@
  *************************************************************/
 void sdelay (unsigned long loops)
 {
-	__asm__ volatile ("1:\n"
-					  "subs %0, %1, #1\n"
-					  "bne 1b":"=r" (loops):"0" (loops));
+	__asm__ volatile ("1:\n" "subs %0, %1, #1\n"
+		"bne 1b":"=r" (loops):"0" (loops));
 }
 
 /*********************************************************************************
@@ -50,12 +49,10 @@ void sdelay (unsigned long loops)
 void prcm_init(void)
 {
 	u32 rev,div;
-#ifdef CONFIG_PARTIAL_SRAM
 	void (*f_lock_pll) (u32, u32, u32, u32);
 	extern void *_end_vect, *_start;
 
 	f_lock_pll = (void *)((u32)&_end_vect - (u32)&_start + SRAM_VECT_CODE);
-#endif
 
 	__raw_writel(0, CM_FCLKEN1_CORE);	   /* stop all clocks to reduce ringing */
 	__raw_writel(0, CM_FCLKEN2_CORE);	   /* may not be necessary */
@@ -75,45 +72,33 @@ void prcm_init(void)
 	__raw_writel(div, CM_CLKSEL1_CORE);/* set L3/L4/USB/Display/Vlnc/SSi dividers */
 	sdelay(1000);
 
-#ifndef CONFIG_PARTIAL_SRAM
-	/* If running fully from SRAM this is OK.  The Flash bus drops out for just a little.
-	 * but then comes back.  If running from Flash this sequence kills you, thus you need
-	 * to run it using CONFIG_PARTIAL_SRAM.
-	 */
-	__raw_writel(MODE_BYPASS_FAST, CM_CLKEN_PLL); /* go to bypass, fast relock */
-	wait_on_value(BIT0|BIT1, BIT1, CM_IDLEST_CKGEN, LDELAY); /* wait till in bypass */
-
-	/* set clock selection and dpll dividers. */
-	__raw_writel(DPLL_VAL, CM_CLKSEL1_PLL);	 /* set pll for target rate */
-	__raw_writel(COMMIT_DIVIDERS, PRCM_CLKCFG_CTRL); /* commit dividers */
-	sdelay(10000);
-	__raw_writel(DPLL_LOCK, CM_CLKEN_PLL); /* enable dpll */
-	sdelay(10000);
-	wait_on_value(BIT0|BIT1, BIT2, CM_IDLEST_CKGEN, LDELAY);  /*wait for dpll lock */
-#else
-/* if running from flash, need to jump to small relocated code area in SRAM.
- * This is the only safe spot to do configurations from.
- */
-	(*f_lock_pll)(PRCM_CLKCFG_CTRL, CM_CLKEN_PLL, DPLL_LOCK, CM_IDLEST_CKGEN);
-#endif
+	if(running_in_sram()){
+		/* If running fully from SRAM this is OK.  The Flash bus drops out for just a little.
+	 	* but then comes back.  If running from Flash this sequence kills you, thus you need
+	 	* to run it using CONFIG_PARTIAL_SRAM.
+	 	*/
+		__raw_writel(MODE_BYPASS_FAST, CM_CLKEN_PLL); /* go to bypass, fast relock */
+		wait_on_value(BIT0|BIT1, BIT0, CM_IDLEST_CKGEN, LDELAY); /* wait till in bypass */
+		sdelay(1000);
+		/* set clock selection and dpll dividers. */
+		__raw_writel(DPLL_VAL, CM_CLKSEL1_PLL);	 /* set pll for target rate */
+		__raw_writel(COMMIT_DIVIDERS, PRCM_CLKCFG_CTRL); /* commit dividers */
+		sdelay(10000);
+		__raw_writel(DPLL_LOCK, CM_CLKEN_PLL); /* enable dpll */
+		sdelay(10000);
+		wait_on_value(BIT0|BIT1, BIT1, CM_IDLEST_CKGEN, LDELAY);  /*wait for dpll lock */
+	}else if(running_in_flash()){
+		/* if running from flash, need to jump to small relocated code area in SRAM.
+		 * This is the only safe spot to do configurations from.
+		 */
+		(*f_lock_pll)(PRCM_CLKCFG_CTRL, CM_CLKEN_PLL, DPLL_LOCK, CM_IDLEST_CKGEN);
+	}
 
 	__raw_writel(DPLL_LOCK|APLL_LOCK, CM_CLKEN_PLL);   /* enable apll */
 	wait_on_value(BIT8, BIT8, CM_IDLEST_CKGEN, LDELAY);	/* wait for apll lock */
 	sdelay(1000);
 }
 
-/***********************************************
- * memif_init() - init the gpmc and sdrc
- *  - early init routines, called from flash or
- *  SRAM.
- ***********************************************/
-void memif_init(void)
-{
-	sdrc_init();
-#ifndef CONFIG_PARTIAL_SRAM  /* don't init if calling from flash */
-	gpmc_init();
-#endif
-}
 
 /********************************************************
  *  mem_ok() - test used to see if timings are correct
@@ -121,11 +106,17 @@ void memif_init(void)
  *             we are currently using.
  *******************************************************/
 u32 mem_ok(void)
-{  u32 val;
-	__raw_writel(0x0,OMAP2420_SDRC_CS0+0x400);  /* clear pos A */
-	__raw_writel(0x12345678, OMAP2420_SDRC_CS0);/* pattern to pos B */
-	val = __raw_readl(OMAP2420_SDRC_CS0+0x400); /* get pos A value */
-	if (val != 0)                               /* see if pos A value changed*/
+{
+	u32 val1, val2;
+	u32 pattern = 0x12345678;
+
+	__raw_writel(0x0,OMAP2420_SDRC_CS0+0x400);   /* clear pos A */
+	__raw_writel(pattern, OMAP2420_SDRC_CS0);    /* pattern to pos B */
+	__raw_writel(0x0,OMAP2420_SDRC_CS0+4);       /* remove pattern off the bus */
+	val1 = __raw_readl(OMAP2420_SDRC_CS0+0x400); /* get pos A value */
+	val2 = __raw_readl(OMAP2420_SDRC_CS0);       /* get val2 */
+
+	if ((val1 != 0) || (val2 != pattern))        /* see if pos A value changed*/
 		return(0);
 	else
 		return(1);
@@ -142,122 +133,157 @@ void sdrc_init(void)
 	do_sdrc_init(SDRC_CS0_OSET, EARLY_INIT);  /* only init up first bank here */
 }
 
-/**********************************************************
+/*************************************************************************
  * do_sdrc_init(): initialize the SDRAM for use.
  *  -called from low level code with stack only.
  *  -code sets up SDRAM timing and muxing for 2422 or 2420.
  *  -optimal settings can be placed here, or redone after i2c
  *      inspection of board info
  *
- * !!! When ES1 comes out need to conditionalize RFR value!!!
- **********************************************************/
+ *  This is a bit ugly, but should handle all memory moduels
+ *   used with the H4. The first time though this code from s_init()
+ *   we configure the first chip select.  Later on we come back and
+ *   will configure the 2nd chip select if it exists.
+ *
+ **************************************************************************/
 void do_sdrc_init(u32 offset, u32 early)
 {
-	u32 cpu, bug=0, rev, shared=0, cs0=0, pmask=0,first=1;
+	u32 cpu, bug=0, rev, common=0, cs0=0, pmask=0, pass_type;
 	sdrc_data_t *sdata;	 /* do not change type */
+	u32 a, b, r;
 
 	static const sdrc_data_t sdrc_2422 =
 	{
-		H4_2422_SDRC_SHARING, H4_2422_SDRC_MDCFG_0, H4_2422_SDRC_ACTIM_CTRLA_0,
-		H4_2422_SDRC_ACTIM_CTRLB_0, H4_2422_SDRC_RFR_CTRL_ES1, H4_2422_SDRC_MR_0,
-		H4_2422_SDRC_DLLA_CTRL, H4_2422_SDRC_DLLB_CTRL
+		H4_2422_SDRC_SHARING, H4_2422_SDRC_MDCFG_0_DDR, 0 , H4_2422_SDRC_ACTIM_CTRLA_0,
+		H4_2422_SDRC_ACTIM_CTRLB_0, H4_2422_SDRC_RFR_CTRL_ES1, H4_2422_SDRC_MR_0_DDR,
+		0, H4_2422_SDRC_DLLA_CTRL, H4_2422_SDRC_DLLB_CTRL
 	};
 	static const sdrc_data_t sdrc_2420 =
 	{
-		H4_2420_SDRC_SHARING, H4_2420_SDRC_MDCFG_0, H4_2420_SDRC_ACTIM_CTRLA_0,
-		H4_2420_SDRC_ACTIM_CTRLB_0, H4_2420_SDRC_RFR_CTRL_ES1, H4_2420_SDRC_MR_0,
+		H4_2420_SDRC_SHARING, H4_2420_SDRC_MDCFG_0_DDR, H4_2420_SDRC_MDCFG_0_SDR,
+		H4_2420_SDRC_ACTIM_CTRLA_0, H4_2420_SDRC_ACTIM_CTRLB_0,
+		H4_2420_SDRC_RFR_CTRL_ES1, H4_2420_SDRC_MR_0_DDR, H4_2420_SDRC_MR_0_SDR,
 		H4_2420_SDRC_DLLA_CTRL, H4_2420_SDRC_DLLB_CTRL
 	};
 
 	if (offset == SDRC_CS0_OSET)
-		cs0 = shared = 1;  /* int regs shared between both chip select */
+		cs0 = common = 1;  /* int regs shared between both chip select */
 
 	cpu = get_cpu_type();
 
-	/* warning generated, though code generation is correct. this may bite later, but is ok for now.
-	 *  there is only so much C code you can do on stack only operation.
+	/* warning generated, though code generation is correct. this may bite later,
+         * but is ok for now. there is only so much C code you can do on stack only
+         * operation.
 	 */
-	if (cpu == CPU_2422)
-		sdata = &sdrc_2422;
-	else
-		sdata = &sdrc_2420;
-	__asm__ __volatile__("": : :"memory");
-#ifdef CONFIG_PARTIAL_SRAM
-	/* u-boot is compiled to run in DDR at 8xxxxxxx.  If we use data here which is not pc relative
-	 * we need to get the address correct.  We need to find the current flash mapping to dress up
-	 * the initial pointer load.  As long as this is const data we should be ok.
-	 */
-	if(early)
-		sdata = (sdrc_data_t *)(((u32)sdata & 0x0003FFFF) | get_gpmc0_base());
-#endif
+	if (cpu == CPU_2422){
+		sdata = (sdrc_data_t *)&sdrc_2422;
+		pass_type = STACKED;
+	}
+	else{
+		sdata = (sdrc_data_t *)&sdrc_2420;
+		pass_type = IP_DDR;
+	}
 
-	men_combo:
+	__asm__ __volatile__("": : :"memory");  /* limit compiler scope */
 
-	if (!early && get_mem_type() == DDR_COMBO) { /* combo part has a shared CKE signal, can't use feature */
+	/* u-boot is compiled to run in DDR or SRAM at 8xxxxxxx or 4xxxxxxx.
+         * If we are running in flash prior to relocation and we use data
+         * here which is not pc relative we need to get the address correct.
+         * We need to find the current flash mapping to dress up the initial
+         * pointer load.  As long as this is const data we should be ok.
+	 */
+	if((early) && running_in_flash()){
+		sdata = (sdrc_data_t *)(((u32)sdata & 0x0003FFFF) | get_gpmc0_base());
+		/* NOR internal boot offset is 0x4000 from xloader signature */
+		if(running_from_internal_boot())
+			sdata = (sdrc_data_t *)((u32)sdata + 0x4000);
+	}
+	if (!early && (get_mem_type() == DDR_COMBO)) {/* combo part has a shared CKE signal, can't use feature */
 		pmask = BIT2;
-		first = 0;	/* trigger ddr_combo init */
+		pass_type = COMBO_DDR; /* CS1 config */
 	}
 
-	if (shared) {
-		__raw_writel(__raw_readl(SMS_SYSCONFIG)|SMART_IDLE, SMS_SYSCONFIG);
-		__raw_writel(SMART_IDLE|SOFTRESET, SDRC_SYSCONFIG);	/* reset sdrc */
-		wait_on_value(BIT0, BIT0, SDRC_STATUS, 12000000);	/* wait till reset done set */
-		__raw_writel(SMART_IDLE, SDRC_SYSCONFIG);		/* clear soft reset */
+next_mem_type:
+	if (common) {	/* do a SDRC reset between types to clear regs*/
+		__raw_writel(SOFTRESET, SDRC_SYSCONFIG);	/* reset sdrc */
+		wait_on_value(BIT0, BIT0, SDRC_STATUS, 12000000);/* wait till reset done set */
+		__raw_writel(0, SDRC_SYSCONFIG);		/* clear soft reset */
 		__raw_writel(sdata->sdrc_sharing, SDRC_SHARING);
-		__raw_writel((__raw_readl(SDRC_POWER)|SMART_IDLE) & ~pmask, SDRC_POWER);
+		__raw_writel((__raw_readl(SDRC_POWER)) & ~pmask, SDRC_POWER);
+#ifdef POWER_SAVE
+		__raw_writel(__raw_readl(SMS_SYSCONFIG)|SMART_IDLE, SMS_SYSCONFIG);
+		__raw_writel(sdata->sdrc_sharing|SMART_IDLE, SDRC_SHARING);
+		__raw_writel((__raw_readl(SDRC_POWER)|BIT6) & ~pmask, SDRC_POWER);
+#endif
+	}
+
+	if ((pass_type == IP_DDR) || (pass_type == STACKED)) /* (IP ddr-CS0),(2422-CS0/CS1) */
+		__raw_writel(sdata->sdrc_mdcfg_0_ddr, SDRC_MCFG_0+offset);
+	else if (pass_type == COMBO_DDR){ /* (combo-CS0/CS1) */
+		__raw_writel(H4_2420_COMBO_MDCFG_0_DDR,SDRC_MCFG_0+offset);
+	} else if (pass_type == IP_SDR){ /* ip sdr-CS0 */
+		__raw_writel(sdata->sdrc_mdcfg_0_sdr, SDRC_MCFG_0+offset);
 	}
-	if (first)
-		__raw_writel(sdata->sdrc_mdcfg_0, SDRC_MCFG_0+offset);
-	else {
-		__raw_writel((__raw_readl(SDRC_POWER)|SMART_IDLE) & ~pmask, SDRC_POWER);
-		__raw_writel(H4_2420_COMBO_MDCFG_0,SDRC_MCFG_0+offset);
+
+	if(pass_type == IP_SDR){  /* SDRAM can run full speed only rated for 105MHz*/
+		a = H4_242X_SDRC_ACTIM_CTRLA_0_100MHz;
+		b = H4_242X_SDRC_ACTIM_CTRLB_0_100MHz;
+		r = H4_2420_SDRC_RFR_CTRL;
+	} else {
+		a = sdata->sdrc_actim_ctrla_0;
+		b = sdata->sdrc_actim_ctrlb_0;
+		r = sdata->sdrc_rfr_ctrl;
 	}
 
 	if (cs0) {
-		__raw_writel(sdata->sdrc_actim_ctrla_0, SDRC_ACTIM_CTRLA_0);
-		__raw_writel(sdata->sdrc_actim_ctrlb_0, SDRC_ACTIM_CTRLB_0);
+		__raw_writel(a, SDRC_ACTIM_CTRLA_0);
+		__raw_writel(b, SDRC_ACTIM_CTRLB_0);
 	} else {
-		__raw_writel(sdata->sdrc_actim_ctrla_0, SDRC_ACTIM_CTRLA_1);
-		__raw_writel(sdata->sdrc_actim_ctrlb_0, SDRC_ACTIM_CTRLB_1);
+		__raw_writel(a, SDRC_ACTIM_CTRLA_1);
+		__raw_writel(b, SDRC_ACTIM_CTRLB_1);
 	}
 
-	__raw_writel(sdata->sdrc_rfr_ctrl, SDRC_RFR_CTRL+offset);
+	__raw_writel(r, SDRC_RFR_CTRL+offset);
 
-	/* init sequence for _mDDR_ using manual commands (DDR is a bit different) */
+	/* init sequence for mDDR/mSDR using manual commands (DDR is a bit different) */
 	__raw_writel(CMD_NOP, SDRC_MANUAL_0+offset);
-	sdelay(5000);  /* susposed to be 100us per design spec for mddr*/
+	sdelay(5000);  /* susposed to be 100us per design spec for mddr/msdr */
 	__raw_writel(CMD_PRECHARGE, SDRC_MANUAL_0+offset);
 	__raw_writel(CMD_AUTOREFRESH, SDRC_MANUAL_0+offset);
 	__raw_writel(CMD_AUTOREFRESH, SDRC_MANUAL_0+offset);
 
 	/*
 	 * CSx SDRC Mode Register
-	 * Burst length = 4 - DDR memory
+	 * Burst length = (4 - DDR) (2-SDR)
 	 * Serial mode
 	 * CAS latency = x
 	 */
-	__raw_writel(sdata->sdrc_mr_0, SDRC_MR_0+offset);
+	if(pass_type == IP_SDR)
+		__raw_writel(sdata->sdrc_mr_0_sdr, SDRC_MR_0+offset);
+	else
+		__raw_writel(sdata->sdrc_mr_0_ddr, SDRC_MR_0+offset);
 
-	/* NOTE: ES1 242x _BUG_ DLL */
+	/* NOTE: ES1 242x _BUG_ DLL + External Bandwidth fix*/
 	rev  = get_cpu_rev();
-	if (rev == CPU_2420_ES1 || rev ==  CPU_2422_ES1)
+	if (rev == CPU_2420_ES1 || rev ==  CPU_2422_ES1){
 		bug = BIT0;
+		__raw_writel((__raw_readl(SMS_CLASS_ARB0)|BURSTCOMPLETE_GROUP7)
+			,SMS_CLASS_ARB0);/* enable bust complete for lcd */
+	}
 	/* enable & load up DLL with good value for 75MHz, and set phase to 90% */
-	if (shared) {
+	if (common && (pass_type != IP_SDR)) {
 		__raw_writel(sdata->sdrc_dlla_ctrl, SDRC_DLLA_CTRL);
 		__raw_writel(sdata->sdrc_dlla_ctrl & ~(BIT2|bug), SDRC_DLLA_CTRL);
 		__raw_writel(sdata->sdrc_dllb_ctrl, SDRC_DLLB_CTRL);
 		__raw_writel(sdata->sdrc_dllb_ctrl & ~(BIT2|bug) , SDRC_DLLB_CTRL);
 	}
-	sdelay(9000);
-	if (!first || mem_ok())	/* passed test or 2nd bank init */
-		return;
-	else {
-		first = 0;
-		goto men_combo;
-	}
-}
+	sdelay(90000);
 
+	if(mem_ok())
+		return; /* STACKED, other configued type */
+	++pass_type; /* IPDDR->COMBODDR->IPSDR for CS0 */
+	goto next_mem_type;
+}
 
 /*****************************************************
  * gpmc_init(): init gpmc bus
@@ -272,7 +298,11 @@ void gpmc_init(void)
 	__raw_writel(0x10, GPMC_SYSCONFIG);	/* smart idle */
 	__raw_writel(0x0, GPMC_IRQENABLE);	/* isr's sources masked */
 	__raw_writel(0x1, GPMC_TIMEOUT_CONTROL);/* timeout disable */
+#ifdef CFG_NAND_BOOT
+	__raw_writel(0x001, GPMC_CONFIG);	/* set nWP, disable limited addr */
+#else
 	__raw_writel(0x111, GPMC_CONFIG);	/* set nWP, disable limited addr */
+#endif
 
 	/* discover bus connection from sysboot */
 	if (is_gpmc_muxed() == GPMC_MUXED)
@@ -283,11 +313,22 @@ void gpmc_init(void)
 	/* setup cs0 */
 	__raw_writel(0x0, GPMC_CONFIG7_0);	/* disable current map */
 	sdelay(1000);
+
+#ifdef CFG_NAND_BOOT
+	__raw_writel(H4_24XX_GPMC_CONFIG1_0|mtype|mwidth, GPMC_CONFIG1_0);
+#else
 	__raw_writel(H4_24XX_GPMC_CONFIG1_0|mux|mtype|mwidth, GPMC_CONFIG1_0);
-	/* __raw_writel(H4_24XX_GPMC_CONFIG2_0, GPMC_CONFIG2_0); */
+#endif
+
+#ifdef PRCM_CONFIG_III
+	__raw_writel(H4_24XX_GPMC_CONFIG2_0, GPMC_CONFIG2_0);
+#endif
 	__raw_writel(H4_24XX_GPMC_CONFIG3_0, GPMC_CONFIG3_0);
 	__raw_writel(H4_24XX_GPMC_CONFIG4_0, GPMC_CONFIG4_0);
-	/* __raw_writel(H4_24XX_GPMC_CONFIG5_0, GPMC_CONFIG5_0); */
+#ifdef PRCM_CONFIG_III
+	__raw_writel(H4_24XX_GPMC_CONFIG5_0, GPMC_CONFIG5_0);
+	__raw_writel(H4_24XX_GPMC_CONFIG6_0, GPMC_CONFIG6_0);
+#endif
 	__raw_writel(H4_24XX_GPMC_CONFIG7_0, GPMC_CONFIG7_0);/* enable new mapping */
 	sdelay(2000);
 
@@ -303,3 +344,4 @@ void gpmc_init(void)
 	__raw_writel(H4_24XX_GPMC_CONFIG7_1, GPMC_CONFIG7_1); /* enable mapping */
 	sdelay(2000);
 }
+
diff --git a/board/omap2420h4/omap2420h4.c b/board/omap2420h4/omap2420h4.c
index bf398f6efcb..697dfefe68d 100644
--- a/board/omap2420h4/omap2420h4.c
+++ b/board/omap2420h4/omap2420h4.c
@@ -31,6 +31,11 @@
 #include <asm/arch/mem.h>
 #include <i2c.h>
 #include <asm/mach-types.h>
+#if (CONFIG_COMMANDS & CFG_CMD_NAND)
+#include <linux/mtd/nand.h>
+extern struct nand_chip nand_dev_desc[CFG_MAX_NAND_DEVICE];
+#endif
+
 
 static void wait_for_command_complete(unsigned int wd_base);
 
@@ -40,9 +45,8 @@ static void wait_for_command_complete(unsigned int wd_base);
  ******************************************************/
 static inline void delay (unsigned long loops)
 {
-	__asm__ volatile ("1:\n"
-					  "subs %0, %1, #1\n"
-					  "bne 1b":"=r" (loops):"0" (loops));
+	__asm__ volatile ("1:\n" "subs %0, %1, #1\n"
+		"bne 1b":"=r" (loops):"0" (loops));
 }
 
 /*****************************************
@@ -52,11 +56,9 @@ static inline void delay (unsigned long loops)
 int board_init (void)
 {
 	DECLARE_GLOBAL_DATA_PTR;
-#ifndef CONFIG_PARTIAL_SRAM
-	s_init(0x0);  /* full sram build, never skip clock and sdrc, no point */
-#else
-	gpmc_init();
-#endif
+
+	gpmc_init(); /* in SRAM or SDRM, finish GPMC */
+
 	gd->bd->bi_arch_number = MACH_TYPE_OMAP_H4;		/* board id for linux */
 	gd->bd->bi_boot_params = (OMAP2420_SDRC_CS0+0x100);	/* adress of boot parameters */
 
@@ -66,23 +68,23 @@ int board_init (void)
 /**********************************************************
  * Routine: s_init
  * Description: Does early system init of muxing and clocks.
- * - Called at time when only stack is available.
+ * - Called path is with sram stack.
  **********************************************************/
-void s_init(int skip)
+void s_init(void)
 {
+	int in_sdram = running_in_sdram();
+
 	watchdog_init();
 	set_muxconf_regs();
 	delay(100);
 
-	if (!skip)
+	if(!in_sdram)
 		prcm_init();
 
 	peripheral_enable();
 	icache_enable();
-#ifndef CONFIG_APTIX
-	if (!skip)
-		memif_init();
-#endif
+	if (!in_sdram)
+		sdrc_init();
 }
 
 /*******************************************************
@@ -102,7 +104,7 @@ int misc_init_r (void)
 void watchdog_init(void)
 {
 	int mode;
-#define GP (BIT8|BIT9)
+	#define GP (BIT8|BIT9)
 
 	/* There are 4 watch dogs.  1 secure, and 3 general purpose.
 	 * I would expect that the ROM takes care of the secure one,
@@ -152,6 +154,8 @@ void ether_init (void)
 #ifdef CONFIG_DRIVER_LAN91C96
 	int cnt = 20;
 
+	__raw_writeb(0x3,OMAP2420_CTRL_BASE+0x10a); /*protect->gpio95 */
+
 	__raw_writew(0x0, LAN_RESET_REGISTER);
 	do {
 		__raw_writew(0x1, LAN_RESET_REGISTER);
@@ -189,7 +193,9 @@ int dram_init (void)
 	DECLARE_GLOBAL_DATA_PTR;
 	unsigned int size0=0,size1=0;
 	u32 mtype, btype;
-#define NOT_EARLY 0
+	u8 chg_on = 0x5; /* enable charge of back up battery */
+	u8 vmode_on = 0x8C;
+	#define NOT_EARLY 0
 
 	i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE); /* need this a bit early */
 
@@ -197,13 +203,18 @@ int dram_init (void)
 	mtype = get_mem_type();
 
 	display_board_info(btype);
-	if (btype == BOARD_H4_MENELAUS)
-		update_mux(btype,mtype);
+	if (btype == BOARD_H4_MENELAUS){
+		update_mux(btype,mtype); /* combo part on menelaus */
+		i2c_write(I2C_MENELAUS, 0x20, 1, &chg_on, 1); /*fix POR reset bug */
+		i2c_write(I2C_MENELAUS, 0x2, 1, &vmode_on, 1); /* VCORE change on VMODE */
+	}
 
 	if ((mtype == DDR_COMBO) || (mtype == DDR_STACKED)) {
 		do_sdrc_init(SDRC_CS1_OSET, NOT_EARLY);	/* init other chip select */
 		size0 = size1 = SZ_32M;
-	} else
+	} else if (mtype == SDR_DISCRETE)
+		size0 = SZ_128M;
+	else
 		size0 = SZ_64M;
 
 	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
@@ -477,7 +488,7 @@ void muxSetupCamera(void)
 	/* CAMERA_RSTZ  pin configuration, PIN = Y16 */
 	/* CAM_RST is connected through the I2C IO expander.*/
 	/* MuxConfigReg = (volatile unsigned char *), CONTROL_PADCONF_SYS_NRESWARM*/
-	/* *MuxConfigReg = 0x00 ; /* Mode = 0, PUPD=Disabled   */
+	/* *MuxConfigReg = 0x00 ; / * Mode = 0, PUPD=Disabled   */
 
 	/* CAMERA_XCLK  pin configuration, PIN = U3 */
 	MuxConfigReg = (volatile unsigned char *)CONTROL_PADCONF_CAM_XCLK;
@@ -661,7 +672,7 @@ void muxSetupHDQ(void)
 void muxSetupGPMC(void)
 {
 	volatile uint8 *MuxConfigReg;
-	volatile unsigned int *MCR = 0x4800008C;
+	volatile unsigned int *MCR = (volatile unsigned int *)0x4800008C;
 
 	/* gpmc_io_dir */
 	*MCR = 0x19000000;
@@ -830,3 +841,25 @@ void update_mux(u32 btype,u32 mtype)
 		}
 	}
 }
+
+#if (CONFIG_COMMANDS & CFG_CMD_NAND)
+void nand_init(void)
+{
+    extern flash_info_t flash_info[];
+
+    nand_probe(CFG_NAND_ADDR);
+    if (nand_dev_desc[0].ChipID != NAND_ChipID_UNKNOWN) {
+		print_size(nand_dev_desc[0].totlen, "\n");
+    }
+
+#ifdef CFG_JFFS2_MEM_NAND
+    flash_info[CFG_JFFS2_FIRST_BANK].flash_id = nand_dev_desc[0].id;
+    flash_info[CFG_JFFS2_FIRST_BANK].size = 1024*1024*2;      /* only read kernel single meg partition */
+	flash_info[CFG_JFFS2_FIRST_BANK].sector_count = 1024;   /* 1024 blocks in 16meg chip (use less for raw/copied partition) */
+    flash_info[CFG_JFFS2_FIRST_BANK].start[0] = 0x80200000; /* ?, ram for now, open question, copy to RAM or adapt for NAND */
+#endif
+}
+#endif
+
+
+
diff --git a/board/omap2420h4/platform.S b/board/omap2420h4/platform.S
index dc1b443713f..86bf5ba3c51 100644
--- a/board/omap2420h4/platform.S
+++ b/board/omap2420h4/platform.S
@@ -33,8 +33,6 @@
 _TEXT_BASE:
 	.word	TEXT_BASE	/* sdram load addr from config.mk */
 
-#ifdef CONFIG_PARTIAL_SRAM
-
 /**************************************************************************
  * cpy_clk_code: relocates clock code into SRAM where its safer to execute
  * R1 = SRAM destination address.
@@ -159,41 +157,16 @@ pll_div_add:
     .word CM_CLKSEL1_PLL
 pll_div_val:
     .word DPLL_VAL	/* DPLL setting (300MHz default) */
-#endif
 
 .globl platformsetup
 platformsetup:
-	mov r3, r0     /* save skip information */
-#ifdef CONFIG_APTIX
-	ldr	r0,	REG_SDRC_MCFG_0
-	ldr	r1,	VAL_SDRC_MCFG_0
-	str	r1,	[r0]
-	ldr	r0,	REG_SDRC_MR_0
-	ldr	r1,	VAL_SDRC_MR_0
-	str	r1,	[r0]
-	/* a ddr needs emr1 set here */
-	ldr	r0,	REG_SDRC_SHARING
-	ldr	r1,	VAL_SDRC_SHARING
-	str	r1,	[r0]
-	ldr	r0,	REG_SDRC_RFR_CTRL_0
-	ldr	r1,	VAL_SDRC_RFR_CTRL_0
-	str	r1,	[r0]
-
-       /* little delay after init */
-       mov r2, #0x1800
-1:
-	subs r2, r2, #0x1
-	bne 1b
-#endif
-#ifdef CONFIG_PARTIAL_SRAM
 	ldr	sp,	SRAM_STACK
 	str	ip,	[sp]	/* stash old link register */
 	mov	ip,	lr	/* save link reg across call */
-	mov	r0,	r3	/* pass skip info to s_init */
 	bl	s_init		/* go setup pll,mux,memory */
 	ldr	ip,	[sp]	/* restore save ip */
 	mov	lr,	ip	/* restore link reg */
-#endif
+
 	/* map interrupt controller */
 	ldr	r0,	VAL_INTH_SETUP
 	mcr	p15, 0, r0, c15, c2, 4
@@ -211,21 +184,3 @@ VAL_INTH_SETUP:
 SRAM_STACK:
 	.word LOW_LEVEL_SRAM_STACK
 
-#ifdef CONFIG_APTIX
-REG_SDRC_SHARING:
-	.word SDRC_SHARING
-REG_SDRC_MCFG_0:
-	.word SDRC_MCFG_0
-REG_SDRC_MR_0:
-	.word SDRC_MR_0
-REG_SDRC_RFR_CTRL_0:
-	.word SDRC_RFR_CTRL
-VAL_SDRC_SHARING:
-	.word VAL_H4_SDRC_SHARING
-VAL_SDRC_MCFG_0:
-	.word VAL_H4_SDRC_MCFG_0
-VAL_SDRC_MR_0:
-	.word VAL_H4_SDRC_MR_0
-VAL_SDRC_RFR_CTRL_0:
-	.word VAL_H4_SDRC_RFR_CTRL_0
-#endif
diff --git a/board/omap2420h4/sys_info.c b/board/omap2420h4/sys_info.c
index b5fe9e39250..78b936cfff3 100644
--- a/board/omap2420h4/sys_info.c
+++ b/board/omap2420h4/sys_info.c
@@ -70,13 +70,21 @@ u32 get_cpu_rev(void)
  *************************************************************/
 u32 get_mem_type(void)
 {
+	volatile u32 *burst = (volatile u32 *)(SDRC_MR_0+SDRC_CS0_OSET);
+
 	if (get_cpu_type() == CPU_2422)
 		return(DDR_STACKED);
 
 	if (get_board_type() == BOARD_H4_MENELAUS)
-		return(DDR_COMBO);
+		if(*burst == H4_2420_SDRC_MR_0_SDR)
+			return(SDR_DISCRETE);
+		else
+			return(DDR_COMBO);
 	else
-		return(DDR_DISCRETE);
+		if(*burst == H4_2420_SDRC_MR_0_SDR) /* SDP + SDR kit */
+			return(SDR_DISCRETE);
+		else
+			return(DDR_DISCRETE); /* origional SDP */
 }
 
 /***********************************************************************
@@ -129,6 +137,8 @@ u32 is_gpmc_muxed(void)
 {
 	u32 mux;
 	mux = get_sysboot_value();
+	if ((mux & (BIT0 | BIT1 | BIT2 | BIT3)) == (BIT0 | BIT2 | BIT3))
+		return(GPMC_MUXED); /* NAND Boot mode */
 	if (mux & BIT1)	   /* if mux'ed */
 		return(GPMC_MUXED);
 	else
@@ -200,3 +210,96 @@ void display_board_info(u32 btype)
 		db_s = db_ip;
 	printf("TI H4 SDP Base Board with OMAP%s %s Daughter Board\n",cpu_s, db_s);
 }
+
+/*************************************************************************
+ * get_board_rev() - setup to pass kernel board revision information
+ *          0 = 242x IP platform (first 2xx boards)
+ *          1 = 242x Menelaus platfrom.
+ *************************************************************************/
+u32 get_board_rev(void)
+{
+	u32 rev = 0;
+	u32 btype = get_board_type();
+
+	if (btype == BOARD_H4_MENELAUS){
+		rev = 1;
+	}
+	return(rev);
+}
+
+/********************************************************
+ *  get_base(); get upper addr of current execution
+ *******************************************************/
+static u32 get_base(void)
+{
+	u32  val;
+	__asm__ __volatile__("mov %0, pc \n" : "=r" (val) : : "memory");
+	val &= 0xF0000000;
+	val >>= 28;
+	return(val);
+}
+
+/********************************************************
+ *  get_base2(); get 2upper addr of current execution
+ *******************************************************/
+static u32 get_base2(void)
+{
+	u32  val;
+	__asm__ __volatile__("mov %0, pc \n" : "=r" (val) : : "memory");
+	val &= 0xFF000000;
+	val >>= 24;
+	return(val);
+}
+
+
+
+/********************************************************
+ *  running_in_flash() - tell if currently running in
+ *   flash.
+ *******************************************************/
+u32 running_in_flash(void)
+{
+	if (get_base() < 4)
+		return(1);  /* in flash */
+	return(0); /* running in SRAM or SDRAM */
+}
+
+/********************************************************
+ *  running_in_sram() - tell if currently running in
+ *   sram.
+ *******************************************************/
+u32 running_in_sram(void)
+{
+	if (get_base() == 4)
+		return(1);  /* in SRAM */
+	return(0); /* running in FLASH or SDRAM */
+}
+/********************************************************
+ *  running_in_sdram() - tell if currently running in
+ *   flash.
+ *******************************************************/
+u32 running_in_sdram(void)
+{
+	if (get_base() > 4)
+		return(1);  /* in sdram */
+	return(0); /* running in SRAM or FLASH */
+}
+
+/*************************************************************
+ *  running_from_internal_boot() - am I a signed NOR image.
+ *************************************************************/
+u32 running_from_internal_boot(void)
+{
+	u32 v, base;
+
+	v = get_sysboot_value() & BIT3;
+	base = get_base2();
+	/* if running at mask rom flash address and
+	 * sysboot3 says this was an internal boot
+	 */
+	if ((base == 0x08) && v)
+		return(1);
+	else
+		return(0);
+}
+