mpc83xx: Add NAND boot support for MPC8315E-RDB boards

The core support for NAND booting is there already, so this patch
is pretty straightforward.

There is one trick though: top level Makefile expects nand_spl to
be in nand_spl/board/$(BOARDDIR), but we can fully reuse the code
from mpc8313erdb boards, and so to not duplicate the code we just
symlink nand_spl/board/freescale/mpc8315erdb to mpc8313erdb.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>

o silence make during ln echo
o update documentation
o and avoid:

$ ./MAKEALL MPC8315ERDB_NAND
Configuring for MPC8315ERDB board...
sdram.o: In function `fixed_sdram':
/home/r1aaha/git/u-boot/nand_spl/board/freescale/mpc8313erdb/sdram.c:72: undefined reference to `udelay'

by renaming udelay -> __udelay in the spirit of commit
3eb90bad651fab39cffba750ec4421a9c01d60e7 "Generic udelay() with watchdog
support".

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>

1 files changed, 76 insertions, 19 deletions

diff --git a/include/configs/MPC8315ERDB.h b/include/configs/MPC8315ERDB.h
index 79376b3..cfed4ca 100644
--- a/include/configs/MPC8315ERDB.h
+++ b/include/configs/MPC8315ERDB.h
@@ -25,6 +25,11 @@
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
+#ifdef CONFIG_MK_NAND
+#define CONFIG_NAND_U_BOOT		1
+#define CONFIG_RAMBOOT_TEXT_BASE	0x00100000
+#endif
+
 /*
  * High Level Configuration Options
  */
@@ -51,20 +56,29 @@
 	HRCWL_SVCOD_DIV_2 |\
 	HRCWL_CSB_TO_CLKIN_2X1 |\
 	HRCWL_CORE_TO_CSB_3X1)
-#define CONFIG_SYS_HRCW_HIGH (\
+#define CONFIG_SYS_HRCW_HIGH_BASE (\
 	HRCWH_PCI_HOST |\
 	HRCWH_PCI1_ARBITER_ENABLE |\
 	HRCWH_CORE_ENABLE |\
-	HRCWH_FROM_0X00000100 |\
 	HRCWH_BOOTSEQ_DISABLE |\
 	HRCWH_SW_WATCHDOG_DISABLE |\
-	HRCWH_ROM_LOC_LOCAL_16BIT |\
-	HRCWH_RL_EXT_LEGACY |\
 	HRCWH_TSEC1M_IN_RGMII |\
 	HRCWH_TSEC2M_IN_RGMII |\
 	HRCWH_BIG_ENDIAN |\
 	HRCWH_LALE_NORMAL)
 
+#ifdef CONFIG_NAND_SPL
+#define CONFIG_SYS_HRCW_HIGH (CONFIG_SYS_HRCW_HIGH_BASE |\
+		       HRCWH_FROM_0XFFF00100 |\
+		       HRCWH_ROM_LOC_NAND_SP_8BIT |\
+		       HRCWH_RL_EXT_NAND)
+#else
+#define CONFIG_SYS_HRCW_HIGH (CONFIG_SYS_HRCW_HIGH_BASE |\
+		       HRCWH_FROM_0X00000100 |\
+		       HRCWH_ROM_LOC_LOCAL_16BIT |\
+		       HRCWH_RL_EXT_LEGACY)
+#endif
+
 /*
  * System IO Config
  */
@@ -79,6 +93,10 @@
  */
 #define CONFIG_SYS_IMMR		0xE0000000
 
+#if defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL)
+#define CONFIG_DEFAULT_IMMR	CONFIG_SYS_IMMR
+#endif
+
 /*
  * Arbiter Setup
  */
@@ -161,12 +179,6 @@
  */
 #define CONFIG_SYS_MONITOR_BASE	TEXT_BASE /* start of monitor */
 
-#if (CONFIG_SYS_MONITOR_BASE < CONFIG_SYS_FLASH_BASE)
-#define CONFIG_SYS_RAMBOOT
-#else
-#undef CONFIG_SYS_RAMBOOT
-#endif
-
 #define CONFIG_SYS_MONITOR_LEN		(384 * 1024) /* Reserve 384 kB for Mon */
 #define CONFIG_SYS_MALLOC_LEN		(512 * 1024) /* Reserved for malloc */
 
@@ -200,10 +212,10 @@
 #define CONFIG_SYS_LBLAWBAR0_PRELIM	CONFIG_SYS_FLASH_BASE /* Window base at flash base */
 #define CONFIG_SYS_LBLAWAR0_PRELIM	0x80000016 /* 8MB window size */
 
-#define CONFIG_SYS_BR0_PRELIM		( CONFIG_SYS_FLASH_BASE	/* Flash Base address */ \
+#define CONFIG_SYS_NOR_BR_PRELIM	(CONFIG_SYS_FLASH_BASE \
 				| (2 << BR_PS_SHIFT)	/* 16 bit port size */ \
 				| BR_V )		/* valid */
-#define CONFIG_SYS_OR0_PRELIM		( (~(CONFIG_SYS_FLASH_SIZE - 1) << 20) \
+#define CONFIG_SYS_NOR_OR_PRELIM	((~(CONFIG_SYS_FLASH_SIZE - 1) << 20) \
 				| OR_UPM_XAM \
 				| OR_GPCM_CSNT \
 				| OR_GPCM_ACS_DIV2 \
@@ -223,18 +235,31 @@
 /*
  * NAND Flash on the Local Bus
  */
-#define CONFIG_SYS_NAND_BASE		0xE0600000	/* 0xE0600000 */
+
+#ifdef CONFIG_NAND_SPL
+#define CONFIG_SYS_NAND_BASE		0xFFF00000
+#else
+#define CONFIG_SYS_NAND_BASE		0xE0600000
+#endif
+
 #define CONFIG_SYS_MAX_NAND_DEVICE	1
 #define CONFIG_MTD_NAND_VERIFY_WRITE	1
 #define CONFIG_CMD_NAND			1
 #define CONFIG_NAND_FSL_ELBC		1
+#define CONFIG_SYS_NAND_BLOCK_SIZE 16384
+
+#define CONFIG_SYS_NAND_U_BOOT_SIZE  (512 << 10)
+#define CONFIG_SYS_NAND_U_BOOT_DST   0x00100000
+#define CONFIG_SYS_NAND_U_BOOT_START 0x00100100
+#define CONFIG_SYS_NAND_U_BOOT_OFFS  16384
+#define CONFIG_SYS_NAND_U_BOOT_RELOC 0x00010000
 
-#define CONFIG_SYS_BR1_PRELIM	( CONFIG_SYS_NAND_BASE \
+#define CONFIG_SYS_NAND_BR_PRELIM	(CONFIG_SYS_NAND_BASE \
 				| (2<<BR_DECC_SHIFT)	/* Use HW ECC */ \
 				| BR_PS_8		/* Port Size = 8 bit */ \
 				| BR_MS_FCM		/* MSEL = FCM */ \
 				| BR_V )		/* valid */
-#define CONFIG_SYS_OR1_PRELIM	( 0xFFFF8000		/* length 32K */ \
+#define CONFIG_SYS_NAND_OR_PRELIM	(0xFFFF8000	/* length 32K */ \
 				| OR_FCM_CSCT \
 				| OR_FCM_CST \
 				| OR_FCM_CHT \
@@ -243,9 +268,31 @@
 				| OR_FCM_EHTR )
 				/* 0xFFFF8396 */
 
+#ifdef CONFIG_NAND_U_BOOT
+#define CONFIG_SYS_BR0_PRELIM CONFIG_SYS_NAND_BR_PRELIM
+#define CONFIG_SYS_OR0_PRELIM CONFIG_SYS_NAND_OR_PRELIM
+#define CONFIG_SYS_BR1_PRELIM CONFIG_SYS_NOR_BR_PRELIM
+#define CONFIG_SYS_OR1_PRELIM CONFIG_SYS_NOR_OR_PRELIM
+#else
+#define CONFIG_SYS_BR0_PRELIM CONFIG_SYS_NOR_BR_PRELIM
+#define CONFIG_SYS_OR0_PRELIM CONFIG_SYS_NOR_OR_PRELIM
+#define CONFIG_SYS_BR1_PRELIM CONFIG_SYS_NAND_BR_PRELIM
+#define CONFIG_SYS_OR1_PRELIM CONFIG_SYS_NAND_OR_PRELIM
+#endif
+
 #define CONFIG_SYS_LBLAWBAR1_PRELIM	CONFIG_SYS_NAND_BASE
 #define CONFIG_SYS_LBLAWAR1_PRELIM	0x8000000E	/* 32KB  */
 
+#define CONFIG_SYS_NAND_LBLAWBAR_PRELIM CONFIG_SYS_LBLAWBAR1_PRELIM
+#define CONFIG_SYS_NAND_LBLAWAR_PRELIM CONFIG_SYS_LBLAWAR1_PRELIM
+
+#if CONFIG_SYS_MONITOR_BASE < CONFIG_SYS_FLASH_BASE && \
+	!defined(CONFIG_NAND_SPL)
+#define CONFIG_SYS_RAMBOOT
+#else
+#undef CONFIG_SYS_RAMBOOT
+#endif
+
 /*
  * Serial Port
  */
@@ -254,7 +301,7 @@
 #define CONFIG_SYS_NS16550
 #define CONFIG_SYS_NS16550_SERIAL
 #define CONFIG_SYS_NS16550_REG_SIZE	1
-#define CONFIG_SYS_NS16550_CLK		get_bus_freq(0)
+#define CONFIG_SYS_NS16550_CLK		(CONFIG_83XX_CLKIN * 2)
 
 #define CONFIG_SYS_BAUDRATE_TABLE  \
 	{300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200}
@@ -408,7 +455,16 @@
 /*
  * Environment
  */
-#ifndef CONFIG_SYS_RAMBOOT
+#if defined(CONFIG_NAND_U_BOOT)
+	#define CONFIG_ENV_IS_IN_NAND	1
+	#define CONFIG_ENV_OFFSET		(512 * 1024)
+	#define CONFIG_ENV_SECT_SIZE	CONFIG_SYS_NAND_BLOCK_SIZE
+	#define CONFIG_ENV_SIZE		CONFIG_ENV_SECT_SIZE
+	#define CONFIG_ENV_SIZE_REDUND	CONFIG_ENV_SIZE
+	#define CONFIG_ENV_RANGE	(CONFIG_ENV_SECT_SIZE * 4)
+	#define CONFIG_ENV_OFFSET_REDUND	(CONFIG_ENV_OFFSET + \
+						 CONFIG_ENV_RANGE)
+#elif !defined(CONFIG_SYS_RAMBOOT)
 	#define CONFIG_ENV_IS_IN_FLASH	1
 	#define CONFIG_ENV_ADDR		(CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)
 	#define CONFIG_ENV_SECT_SIZE	0x10000 /* 64K(one sector) for env */
@@ -442,7 +498,7 @@
 #define CONFIG_CMD_DATE
 #define CONFIG_CMD_PCI
 
-#if defined(CONFIG_SYS_RAMBOOT)
+#if defined(CONFIG_SYS_RAMBOOT) && !defined(CONFIG_NAND_U_BOOT)
     #undef CONFIG_CMD_SAVEENV
     #undef CONFIG_CMD_LOADS
 #endif
@@ -504,7 +560,8 @@
 
 /* FLASH: icache cacheable, but dcache-inhibit and guarded */
 #define CONFIG_SYS_IBAT2L	(CONFIG_SYS_FLASH_BASE | BATL_PP_10 | BATL_MEMCOHERENCE)
-#define CONFIG_SYS_IBAT2U	(CONFIG_SYS_FLASH_BASE | BATU_BL_8M | BATU_VS | BATU_VP)
+#define CONFIG_SYS_IBAT2U	(CONFIG_SYS_FLASH_BASE | BATU_BL_32M | \
+				 BATU_VS | BATU_VP)
 #define CONFIG_SYS_DBAT2L	(CONFIG_SYS_FLASH_BASE | BATL_PP_10 | \
 			BATL_CACHEINHIBIT | BATL_GUARDEDSTORAGE)
 #define CONFIG_SYS_DBAT2U	CONFIG_SYS_IBAT2U