* Enable NAND flash support for NC650 board.

* Patch by Thomas Lange 07 Oct 2004:
  Updated README for DBAu1x00 boards to match current status

CHANGELOG

@@ -2,6 +2,11 @@
 Changes since U-Boot 1.1.1:
 ======================================================================
 
+* Enable NAND flash support for NC650 board.
+
+* Patch by Thomas Lange 07 Oct 2004:
+  Updated README for DBAu1x00 boards to match current status
+
 * Patch by Philippe Robin, 28 Sept 2004:
   Fix Flash support for Versatile.
 

board/dbau1x00/README

@@ -1,30 +1,40 @@
-By Thomas.Lange@corelatus.se 2003-10-06
+By Thomas.Lange@corelatus.se 2004-Oct-05
 ----------------------------------------
-DbAu1000 is a development board from AMD containing
-an Alchemy AU1000 with mips32 core.
+DbAu1xx0 are development boards from AMD containing
+an Alchemy AU1xx0 series cpu with mips32 core.
+Existing cpu:s are Au1000, Au1100, Au1500 and Au1550
 
 Limitations & comments
 ----------------------
-I assume that you set board to BIG endian!
-Little endian not tested, most probably broken.
+Support was originally big endian only.
+I have not tested, but several u-boot users report working
+configurations in little endian mode.
 
 I named the board dbau1x00, to allow
 support for all three development boards
-some day ( dbau1000, dbau1100 and dbau1500 ).
+( dbau1000, dbau1100 and dbau1500 ).
+Now there is a new board called dbau1550 also, which 
+should be supported RSN.
 
-I only have a dbau1000, so all testing is limited
-to this board!
+I only have a dbau1000, so my testing is limited
+to this board.
 
 The board has two different flash banks, that can
 be selected via dip switch. This makes it possible
 to test new bootloaders without thrashing the YAMON
-boot loader deliviered with board.
+boot loader delivered with board.
+
+NOTE! When you switch between the two boot flashes, the
+base addresses will be swapped. 
+Have this in mind when you compile u-boot. TEXT_BASE has
+to match the address where u-boot is located when you 
+actually launch. 
 
 Ethernet only supported for mac0.
 
-Pcmcia only supported for slot 0, only 3.3V.
+PCMCIA only supported for slot 0, only 3.3V.
 
-Pcmcia IDE tested with Sandisk Compact Flash and
+PCMCIA IDE tested with Sandisk Compact Flash and
 IBM microdrive.
 
 ###################################
@@ -32,7 +42,7 @@ IBM microdrive.
 ###################################
 If you partition a disk on another system (e.g. laptop),
 all bytes will be swapped on 16bit level when using
-PCMCIA!!!!
+PCMCIA and running cpu in big endian mode!!!!
 
 This is probably due to an error in Au1000 chip.
 

board/nc650/nc650.c

@@ -205,3 +205,13 @@ static long int dram_size (long int mamr_value, long int *base,
 
 	return (get_ram_size(base, maxsize));
 }
+
+#if (CONFIG_COMMANDS & CFG_CMD_NAND)
+void nand_init(void)
+{
+	unsigned long totlen = nand_probe(CFG_NAND_BASE);
+
+	printf ("%4lu MB\n", totlen >> 20);
+}
+#endif
+

include/configs/NC650.h

@@ -96,8 +96,8 @@
 /*
  * Software (bit-bang) I2C driver configuration
  */
-#define SCL		0x10000000	/* PA 3 */
-#define SDA		0x40000000	/* PA 1 */
+#define SCL		0x1000		/* PA 3 */
+#define SDA		0x2000		/* PA 2 */
 
 #define PAR		immr->im_ioport.iop_papar
 #define DIR		immr->im_ioport.iop_padir
@@ -111,19 +111,16 @@
 			else DAT &= ~SDA
 #define I2C_SCL(bit)	if (bit) DAT |=  SCL; \
 			else DAT &= ~SCL
-#define I2C_DELAY	udelay(50)	/* 1/4 I2C clock duration */
+#define I2C_DELAY	udelay(5)	/* 1/4 I2C clock duration */
 
-#define CFG_I2C_EEPROM_ADDR		0x50
-#define CFG_I2C_EEPROM_ADDR_LEN		1
-#define CFG_EEPROM_PAGE_WRITE_BITS  	4	/* 16 bytes page write mode */
-
-#define	CONFIG_RTC_MPC8xx		/* use internal RTC of MPC8xx	*/
+#define CONFIG_RTC_PCF8563
+#define CFG_I2C_RTC_ADDR		0x51
 
 #define CONFIG_COMMANDS	      ( CONFIG_CMD_DFL	| \
 				CFG_CMD_ASKENV	| \
 				CFG_CMD_DHCP	| \
-				CFG_CMD_EEPROM	| \
 				CFG_CMD_I2C	| \
+				CFG_CMD_NAND	| \
 				CFG_CMD_DATE	)
 
 /* this must be included AFTER the definition of CONFIG_COMMANDS (if any) */
@@ -216,6 +213,31 @@
 #define CFG_CACHELINE_SHIFT	4	/* log base 2 of the above value	*/
 #endif
 
+/*
+ * NAND flash support
+ */
+#define CFG_MAX_NAND_DEVICE	1
+#define NAND_ChipID_UNKNOWN	0x00
+#define SECTORSIZE		512
+#define NAND_MAX_FLOORS		1
+#define NAND_MAX_CHIPS		1
+#define ADDR_PAGE		2
+#define ADDR_COLUMN_PAGE	3
+#define ADDR_COLUMN		1
+#define NAND_NO_RB
+
+#define NAND_WAIT_READY(nand)		udelay(12)
+#define WRITE_NAND_COMMAND(d, adr)	WRITE_NAND(d, adr + 2)
+#define WRITE_NAND_ADDRESS(d, adr)	WRITE_NAND(d, adr + 1)
+#define WRITE_NAND(d, adr)		(*(volatile uint8_t *)(adr) = (uint8_t)(d))
+#define READ_NAND(adr)			(*(volatile uint8_t *)(adr))
+#define NAND_DISABLE_CE(nand)		/* nop */
+#define NAND_ENABLE_CE(nand)		/* nop */
+#define NAND_CTL_CLRALE(nandptr)	/* nop */
+#define NAND_CTL_SETALE(nandptr)	/* nop */
+#define NAND_CTL_CLRCLE(nandptr)	/* nop */
+#define NAND_CTL_SETCLE(nandptr)	/* nop */
+
 /*-----------------------------------------------------------------------
  * SYPCR - System Protection Control					11-9
  * SYPCR can only be written once after reset!
@@ -286,6 +308,18 @@
 #define CFG_OR0_PRELIM	(CFG_PRELIM_OR_AM | CFG_OR_TIMING_FLASH)
 #define CFG_BR0_PRELIM	((FLASH_BASE0_PRELIM & BR_BA_MSK) | BR_PS_8 | BR_V)
 
+/*
+ * BR2 and OR2 (NAND Flash)
+ */
+#define CFG_NAND_BASE		0x50000000
+#define CFG_NAND_SIZE		0x04000000
+
+#define CFG_OR_TIMING_NAND	(OR_CSNT_SAM | OR_ACS_DIV1 | OR_BI | \
+				 OR_SCY_15_CLK | OR_EHTR | OR_TRLX)
+
+#define CFG_BR2_PRELIM  ((CFG_NAND_BASE & BR_BA_MSK) | BR_PS_8 | BR_V )
+#define CFG_OR2_PRELIM  (((-CFG_NAND_SIZE) & OR_AM_MSK) | CFG_OR_TIMING_NAND)
+
 /*
  * BR3 and OR3 (SDRAM)
  */