nand: Freescale Integrated Flash Controller NAND support

Add NAND support (including spl) on IFC, such as is found on the p1010.

Note that using hardware ECC on IFC with small-page NAND (which is what
comes on the p1010rdb reference board) means there will be insufficient
OOB space for JFFS2, since IFC does not support 1-bit ECC.  UBI should
work, as it does not use OOB for anything but ECC.

When hardware ECC is not enabled in CSOR, software ECC is now used.

Signed-off-by: Dipen Dudhat <Dipen.Dudhat@freescale.com>
[scottwood@freescale.com: ECC rework and misc fixes]
Signed-off-by: Scott Wood <scottwood@freescale.com>

3 files changed, 27 insertions, 7 deletions

diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init_nand.c b/arch/powerpc/cpu/mpc85xx/cpu_init_nand.c
index 796d398426..6d01479a98 100644
--- a/arch/powerpc/cpu/mpc85xx/cpu_init_nand.c
+++ b/arch/powerpc/cpu/mpc85xx/cpu_init_nand.c
@@ -21,10 +21,12 @@
  */
 
 #include <common.h>
+#include <asm/fsl_ifc.h>
 #include <asm/io.h>
 
 void cpu_init_f(void)
 {
+#ifdef CONFIG_FSL_LBC
 	fsl_lbc_t *lbc = LBC_BASE_ADDR;
 
 	/*
@@ -39,6 +41,14 @@ void cpu_init_f(void)
 #else
 #error  CONFIG_SYS_NAND_BR_PRELIM, CONFIG_SYS_NAND_OR_PRELIM must be defined
 #endif
+#endif
+#ifdef CONFIG_FSL_IFC
+#if defined(CONFIG_SYS_CSPR0) && defined(CONFIG_SYS_CSOR0)
+	set_ifc_cspr(IFC_CS0, CONFIG_SYS_CSPR0);
+	set_ifc_amask(IFC_CS0, CONFIG_SYS_AMASK0);
+	set_ifc_csor(IFC_CS0, CONFIG_SYS_CSOR0);
+#endif
+#endif
 
 #if defined(CONFIG_SYS_RAMBOOT) && defined(CONFIG_SYS_INIT_L2_ADDR)
 	ccsr_l2cache_t *l2cache = (void *)CONFIG_SYS_MPC85xx_L2_ADDR;
diff --git a/arch/powerpc/cpu/mpc85xx/u-boot-nand_spl.lds b/arch/powerpc/cpu/mpc85xx/u-boot-nand_spl.lds
index 8410bd7979..852f9aa4a3 100644
--- a/arch/powerpc/cpu/mpc85xx/u-boot-nand_spl.lds
+++ b/arch/powerpc/cpu/mpc85xx/u-boot-nand_spl.lds
@@ -23,6 +23,8 @@
  * MA 02111-1307 USA
  */
 
+#include "config.h"	/* CONFIG_BOARDDIR */
+
 OUTPUT_ARCH(powerpc)
 SECTIONS
 {
@@ -52,8 +54,18 @@ SECTIONS
 	. = ALIGN(8);
 	__init_begin = .;
 	__init_end = .;
-
-	.resetvec ADDR(.text) + 0xffc : {
+#if defined(CONFIG_FSL_IFC) /* Restrict bootpg at 4K boundry for IFC */
+	.bootpg ADDR(.text) + 0x1000 :
+	{
+		start.o	(.bootpg)
+	}
+#define RESET_VECTOR_OFFSET 0x1ffc /* IFC has 8K sram */
+#elif defined(CONFIG_FSL_ELBC)
+#define RESET_VECTOR_OFFSET 0xffc /* LBC has 4k sram */
+#else
+#error unknown NAND controller
+#endif
+	.resetvec ADDR(.text) + RESET_VECTOR_OFFSET : {
 		KEEP(*(.resetvec))
 	} = 0xffff
 
@@ -64,4 +76,4 @@ SECTIONS
 	}
 	__bss_end__ = .;
 }
-ASSERT(__init_end <= 0xfff00ffc, "NAND bootstrap too big");
+ASSERT(__init_end <= (0xfff00000 + RESET_VECTOR_OFFSET), "NAND bootstrap too big");
diff --git a/arch/powerpc/include/asm/fsl_ifc.h b/arch/powerpc/include/asm/fsl_ifc.h
index d4d9809055..fb12363c88 100644
--- a/arch/powerpc/include/asm/fsl_ifc.h
+++ b/arch/powerpc/include/asm/fsl_ifc.h
@@ -69,6 +69,7 @@
  */
 /* Enable ECC Encoder */
 #define CSOR_NAND_ECC_ENC_EN		0x80000000
+#define CSOR_NAND_ECC_MODE_MASK		0x30000000
 /* 4 bit correction per 520 Byte sector */
 #define CSOR_NAND_ECC_MODE_4		0x00000000
 /* 8 bit correction per 528 Byte sector */
@@ -857,10 +858,7 @@ struct fsl_ifc_nand {
 	u32 res19[0x10];
 	u32 nand_fsr;
 	u32 res20;
-	u32 nand_eccstat0;
-	u32 nand_eccstat1;
-	u32 nand_eccstat2;
-	u32 nand_eccstat3;
+	u32 nand_eccstat[4];
 	u32 res21[0x20];
 	u32 nanndcr;
 	u32 res22[0x2];